A wind turbine bearing seat front and rear bearing outer ring mounting system and mounting method

Abstract

This invention discloses a system and method for installing the front and rear bearing outer rings of a wind turbine bearing housing. The installation system includes an installation platform, a front heating component, a rear heating component, a front outer ring bearing component, a front outer ring clamping component, and a lifting and pressure-holding component. The installation platform supports the bearing housing. The front outer ring bearing component is mounted on the installation platform and drives the front bearing outer ring to move axially along the bearing housing. The front and rear heating components heat the front and rear bearing outer ring mounting surfaces of the bearing housing, respectively. The front heating component includes a variable-diameter heating element that can avoid the movement path of the front bearing outer ring. The front outer ring clamping component maintains pressure on the front bearing outer ring. The lifting and pressure-holding component lifts and maintains pressure on the rear bearing outer ring. This invention reduces the assembly steps required for secondary in-flight rotation of the bearing housing.

Description

Technical Field

[0001] This invention relates to the field of bearings, and in particular to a system and method for mounting the outer rings of the front and rear bearings of a wind turbine bearing housing. Background Technology

[0002] Bearings and bearing housings are important components in the transmission system of wind turbine generators. The assembly condition between the outer ring of the bearing and the bearing housing affects the operational stability of the transmission system.

[0003] For large wind turbines, the front bearing outer ring and the rear bearing outer ring are typically installed at the front and rear ends of the bearing housing, respectively. During assembly, it is necessary not only to meet the fit requirements between the outer ring and the bearing housing, but also to ensure the fit between the end face of the outer ring and the corresponding mounting surface of the bearing housing. Due to the large size and heavy weight of these components, the installation process between the bearing outer ring and the bearing housing usually requires the assistance of hoisting equipment, heating equipment, and clamping tools.

[0004] In the current installation process of wind turbine bearing housings and the outer rings of the front and rear bearings, the bearing housing is typically flipped over and placed vertically first. Then, the mounting surface of the front bearing outer ring is heated. After the front bearing outer ring is hoisted into place and pressure is maintained, the bearing housing is flipped over a second time in mid-air to heat the mounting surface of the rear bearing outer ring and install the final bearing outer ring. Since the front and rear bearing outer rings are located at opposite ends of the bearing housing, and both require heating of their respective mounting surfaces before installation, the existing installation method necessitates changing the bearing housing's orientation to meet the assembly requirements of different ends. For large bearing housings, flipping them in mid-air requires the cooperation of hoisting equipment and personnel, and the operation is significantly affected by the weight, shape, and center of gravity of the workpiece. Summary of the Invention

[0005] To address the issue that existing wind turbine bearing housings require a change in orientation to install the outer rings of the front and rear bearings, resulting in a reliance on a second mid-air flip during installation, this invention proposes a wind turbine bearing housing front and rear bearing outer ring installation system and method.

[0006] Based on this, in a first aspect of the present invention, a wind turbine bearing housing front and rear bearing outer ring mounting system is provided, comprising a mounting platform, a front heating assembly, a rear heating assembly, a front outer ring bearing support assembly, a front outer ring clamping assembly, and a lifting and pressure-holding assembly. The mounting platform supports the bearing housing. The front outer ring bearing support assembly is disposed on the mounting platform and is used to drive the front bearing outer ring to move axially along the bearing housing. The front heating assembly and the rear heating assembly are respectively used to heat the front and rear bearing outer ring mounting surfaces of the bearing housing. The front heating assembly includes a variable-diameter heating element capable of avoiding the movement path of the front bearing outer ring. The front outer ring clamping assembly is used to maintain pressure on the front bearing outer ring, and the lifting and pressure-holding assembly is used to lift and maintain pressure on the rear bearing outer ring.

[0007] With the above structure, the bearing housing can be supported by the mounting platform. The front and rear heating components correspond to the front and rear bearing outer ring mounting surfaces of the bearing housing, respectively, thus providing heating conditions at both ends of the bearing housing while maintaining the same placement posture. Furthermore, the front outer ring support component can move the front bearing outer ring axially along the bearing housing, allowing it to enter the front bearing outer ring mounting surface of the bearing housing. Therefore, the installation of the front bearing outer ring does not require lifting the bearing housing and fitting the front bearing outer ring onto it. Further still, the variable-diameter heating element in the front heating component can avoid obstructing the movement path of the front bearing outer ring, so the front heating component will not hinder the axial movement of the front bearing outer ring into the bearing housing after heating. Moreover, the lifting and pressure-holding component can be used for both lifting and pressure-holding the rear bearing outer ring, and the front outer ring clamping component can hold the pressure of the front bearing outer ring. Thus, the bearing housing can complete the support, heating, front bearing outer ring movement, rear bearing outer ring lifting, and pressure-holding operations required for the installation of the front and rear bearing outer rings on the same mounting platform.

[0008] Preferably, the mounting platform includes a base, a bearing housing support portion, a lifting support portion, a lifting drive component, and a guide component. The bearing housing support portion is disposed on the base and serves to support the bearing housing. The front outer ring support assembly is disposed on the lifting support portion. The lifting drive component connects the base and the lifting support portion and serves to drive the lifting support portion to move axially along the bearing housing. The guide component guides the direction of movement of the lifting support portion.

[0009] Therefore, the outer ring of the front bearing can move axially along the bearing housing with the lifting load part, and the guide can constrain the movement direction of the lifting load part, thereby guiding the outer ring of the front bearing into the bearing housing front bearing outer ring mounting surface.

[0010] Preferably, the bearing housing support portion includes multiple support seats, which are spaced apart circumferentially along the bearing housing. At least one support seat is provided with a height adjustment element for adjusting the support height of the bearing housing on the mounting platform. The front outer ring support assembly is provided with a front outer ring positioning portion for limiting the radial movement of the front bearing outer ring relative to the lifting support portion.

[0011] Therefore, multiple support seats can provide multi-point support for the bearing housing, the height adjustment component can adapt to the support state of the bearing housing on the mounting platform, and the front outer ring positioning part can limit the radial displacement of the front bearing outer ring when the front bearing outer ring moves with the lifting load part.

[0012] Preferably, the front-end heating assembly further includes a drive assembly, a guide rail, and a variable-diameter connecting rod. The variable-diameter heating element slides in conjunction with the guide rail. The variable-diameter connecting rod connects the drive assembly and the variable-diameter heating element, so that the drive assembly drives the variable-diameter heating element to move radially along the bearing housing via the variable-diameter connecting rod.

[0013] Therefore, the variable diameter heating element can move radially under the guidance of the guide rail, allowing it to switch between a heating position and a clearance position.

[0014] Preferably, the drive assembly includes a screw jack, a drive motor, a lifting connecting plate, and a motor mounting base. The screw jack is mounted on the motor mounting base, the drive motor is connected to the screw jack via a transmission, and the lifting connecting plate is connected to the output end of the screw jack. A variable diameter connecting rod connects the lifting connecting plate and the variable diameter heating element. The variable diameter heating element includes multiple arc-shaped segments, which are spaced apart circumferentially along the bearing housing.

[0015] Therefore, the drive motor can drive the lifting connecting plate to move through the screw jack, and the lifting connecting plate can then drive the variable diameter heating element to move through the variable diameter connecting rod. Multiple arc segments can be arranged around the bearing outer ring mounting surface at the front end of the bearing housing, and move with the drive assembly when it is necessary to make way.

[0016] Preferably, the rear-end heating assembly includes a rear-end heating element and a rear-end coil support. The rear-end heating element is disposed on the rear-end coil support and corresponds to the rear bearing outer ring mounting surface of the bearing housing. The rear-end coil support is connected to the mounting platform and can move the rear-end heating element closer to or further away from the rear bearing outer ring mounting surface.

[0017] Therefore, the rear heating element can approach the rear bearing outer ring mounting surface of the bearing housing during heating, and move away from the corresponding position before the rear bearing outer ring is installed, thus leaving space for the rear bearing outer ring to enter the rear bearing outer ring mounting surface of the bearing housing.

[0018] Preferably, the front outer ring clamping assembly includes a front clamping member, a front connecting member, and a front hydraulic cylinder. The front connecting member is used to connect to the bearing housing. The front hydraulic cylinder is disposed between the front connecting member and the front clamping member, and is used to apply an axial clamping force to the front bearing outer ring through the front clamping member. Multiple front hydraulic cylinders are provided, spaced apart circumferentially along the front bearing outer ring.

[0019] Therefore, the front hydraulic cylinder can act on the outer ring of the front bearing through the front clamping member. When multiple front hydraulic cylinders are arranged at circumferential intervals, axial clamping force can be applied at multiple positions in the circumferential direction of the outer ring of the front bearing.

[0020] Preferably, the lifting and pressure-holding assembly includes a lifting frame, a rear outer ring connector, a rear clamping member, and a rear hydraulic cylinder. The lifting frame is provided with a lifting connection part. The rear outer ring connector is disposed on the lifting frame and is used to connect the rear bearing outer ring. The rear hydraulic cylinder is disposed between the lifting frame and the rear clamping member and is used to apply axial clamping force to the rear bearing outer ring through the rear clamping member.

[0021] Therefore, the lifting frame can cooperate with the lifting equipment through the lifting connection part, and the rear outer ring connector can connect to the rear bearing outer ring, so that the rear bearing outer ring moves with the lifting frame to the bearing outer ring mounting surface at the rear end of the bearing housing; after the rear bearing outer ring is installed in place, the rear cylinder can maintain pressure on the rear bearing outer ring through the rear clamping part.

[0022] Preferably, the wind turbine bearing housing front and rear bearing outer ring mounting system further includes a hydraulic pump station. The hydraulic pump station is connected to at least one of the front and rear hydraulic cylinders. The hydraulic pump station includes a pressure detection element and a pressure compensation control element. The pressure detection element is used to detect the cylinder pressure, and the pressure compensation control element is used to control the hydraulic pump station to compensate for pressure when the cylinder pressure is lower than the set pressure.

[0023] Therefore, at least one of the outer rings of the front bearing and the rear bearing can be pressure-maintained by hydraulic means. When the cylinder pressure is lower than the set pressure, the hydraulic pump station can supplement the pressure to maintain the pressure-maintaining state.

[0024] In a second aspect of the invention, a method for installing the front and rear bearing outer rings of a wind turbine bearing housing is provided, employing any of the aforementioned wind turbine bearing housing front and rear bearing outer ring installation systems. The installation method includes the following steps: placing the bearing housing on an installation platform and maintaining the bearing housing in the same placement posture; heating the front and rear bearing outer ring mounting surfaces of the bearing housing respectively using a front heating assembly and a rear heating assembly; ensuring that the variable-diameter heating element in the front heating assembly avoids the movement path of the front bearing outer ring; moving the front bearing outer ring axially along the bearing housing using a front outer ring bearing assembly, so that the front bearing outer ring is installed into the front bearing outer ring mounting surface; suspending the rear bearing outer ring using a lifting and pressure-holding assembly, so that the rear bearing outer ring is installed into the rear bearing outer ring mounting surface; and maintaining pressure on the front and rear bearing outer rings.

[0025] When using the above method, the bearing housing is placed on the mounting platform and maintained in the same orientation. The front and rear bearing outer ring mounting surfaces are heated by the front and rear heating components, respectively. After the front bearing outer ring mounting surface is heated, the variable-diameter heating element leaves the movement path of the front bearing outer ring. The front outer ring bearing assembly then moves the front bearing outer ring axially along the bearing housing, allowing it to enter the front bearing outer ring mounting surface. The rear bearing outer ring is then lifted and installed into the rear bearing outer ring mounting surface using the lifting and pressure-holding assembly. Pressure is maintained after installation of both the front and rear bearing outer rings. Therefore, the installation process of the front and rear bearing outer rings can be completed while maintaining the same orientation of the bearing housing, avoiding repeated changes to the bearing housing orientation to meet different end installation requirements.

[0026] Compared with the prior art, the present invention has at least the following technical effects:

[0027] The bearing housing can maintain the same placement posture on the mounting platform. The front heating component and the rear heating component heat the front bearing outer ring mounting surface and the rear bearing outer ring mounting surface of the bearing housing, respectively. The variable diameter heating element in the front heating component can avoid the movement path of the front bearing outer ring after heating. The front outer ring bearing component can drive the front bearing outer ring to move along the bearing housing axis and be installed into the front bearing outer ring mounting surface. The lifting and pressure holding component can lift the rear bearing outer ring and hold it under pressure.

[0028] Therefore, the present invention, through the cooperation between the installation platform, the front heating component, the rear heating component, the front outer ring bearing component, the front outer ring clamping component, and the hoisting and pressure holding component, enables the installation process of the front and rear bearing outer rings to no longer rely on the secondary aerial flipping of the bearing housing, and enables the installation of the front bearing outer ring to be completed by the front outer ring bearing component.

[0029] Furthermore, when the outer ring clamping assembly and the hoisting pressure holding assembly are respectively pressure-holding using hydraulic cylinders, and the hydraulic pump station has pressure detection and pressure replenishment capabilities, the pressure holding problem caused by relying solely on bolt tightening torque to maintain the clamping force can be reduced. Attached Figure Description

[0030] To more clearly illustrate the technical content of the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0031] Figure 1 This is a front view of the bearing housing placed on the mounting platform according to an embodiment of the present invention;

[0032] Figure 2A top view of the bearing housing provided in an embodiment of the present invention when it is placed on a mounting platform and heated at both the front and rear ends;

[0033] Figure 3 A cross-sectional view of the bearing housing provided in an embodiment of the present invention when it is placed on a mounting platform and subjected to front and rear end heating;

[0034] Figure 4 This is a cross-sectional view of the bearing housing provided in an embodiment of the present invention, placed on an installation platform and subjected to pressure holding of the outer rings of the front and rear bearings.

[0035] Figure 5 This is a top view of the bearing housing provided in an embodiment of the present invention, placed on an installation platform and subjected to pressure holding of the outer rings of the front and rear bearings.

[0036] Figure 6 This is a cross-sectional view of the variable diameter heating element provided in an embodiment of the present invention when it is in a contracted state;

[0037] Figure 7 This is a top view of the variable diameter heating element provided in the embodiment of the present invention when it is in a contracted state;

[0038] Figure 8 This is a cross-sectional view of the variable diameter heating element provided in an embodiment of the present invention in its unfolded state.

[0039] Figure 9 This is a top view of the variable diameter heating element provided in an embodiment of the present invention when it is in the unfolded state.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Bearing housing; 2. Mounting platform; 3. Rear heating assembly; 4. Front heating assembly; 5. Rear bearing outer ring; 6. Front bearing outer ring; 7. Lifting and pressure holding assembly; 41. Screw jack; 42. Mounting base; 43. Variable diameter heating element; 44. Lifting connecting plate; 45. Variable diameter connecting rod; 46. Guide rail; 47. Drive motor. Detailed Implementation

[0042] The technical content of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the described embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. Other implementation methods obtained by those skilled in the art based on the disclosure of the present invention without creative effort should all fall within the scope of protection of the present invention.

[0043] It should be noted that in this specification, the front end represents the mounting side of the front bearing outer ring 6 in bearing housing 1, and also represents the lower side of bearing housing 1 in the figure; the rear end represents the mounting side of the rear bearing outer ring 5, and also represents the upper side of bearing housing 1 in the figure. This is not intended to limit the absolute orientation of bearing housing 1 during actual use or hoisting. Axial direction refers to the direction of movement when the front bearing outer ring 6 or the rear bearing outer ring 5 is installed into the corresponding mounting surface of bearing housing 1. Radial direction refers to the direction extending from the inside out or from the outside in relative to the central axis of bearing housing 1. Circumferential direction refers to the direction extending around the central axis of bearing housing 1. The descriptions of upper, lower, inner, and outer orientations are only for the convenience of illustrating the relative positional relationships between components in conjunction with the accompanying drawings, and are not intended to limit the absolute spatial orientation of the invention during actual use. When the installation system of the present invention is in different placement postures, the connection relationship, movement relationship, and cooperation between the components do not substantially change.

[0044] like Figures 1 to 5 As shown, in a first aspect of the invention, a wind turbine bearing housing front and rear bearing outer ring mounting system is provided. This mounting system includes a mounting platform 2, a front heating assembly 4, a rear heating assembly 3, a front outer ring bearing assembly, a front outer ring clamping assembly, and a lifting and pressure-holding assembly 7. The mounting platform 2 supports the bearing housing 1. The front outer ring bearing assembly is disposed on the mounting platform 2 and is used to drive the front bearing outer ring 6 to move axially along the bearing housing 1. The front heating assembly 4 and the rear heating assembly 3 are used to heat the front and rear bearing outer ring mounting surfaces of the bearing housing 1, respectively. The front heating assembly 4 includes a variable-diameter heating element 43 capable of avoiding the movement path of the front bearing outer ring 6. The front outer ring clamping assembly is used to maintain pressure on the front bearing outer ring 6. The lifting and pressure-holding assembly 7 is used to lift and maintain pressure on the rear bearing outer ring 5.

[0045] Specifically, the bearing housing 1 can be a large bearing housing in a wind turbine generator. The bearing housing 1 has a front bearing outer ring mounting surface and a rear bearing outer ring mounting surface arranged opposite each other. The front bearing outer ring mounting surface is used to mount the front bearing outer ring 6, and the rear bearing outer ring mounting surface is used to mount the rear bearing outer ring 5. The front and rear bearing outer ring mounting surfaces can be cylindrical surfaces, stepped cylindrical surfaces, mounting surfaces with end face limiting parts, or other mounting structures capable of mating with the bearing outer rings. Before the front bearing outer ring 6 and rear bearing outer ring 5 are installed into the front and rear bearing outer ring mounting surfaces, the corresponding mounting surfaces of the bearing housing 1 can be heated to cause thermal expansion in the corresponding parts of the bearing housing 1, thereby facilitating the entry of the front bearing outer ring 6 and rear bearing outer ring 5 into their respective mounting surfaces.

[0046] Specifically, the mounting platform 2 supports the bearing housing 1, the front bearing outer ring 6, the front heating assembly 4, and the rear heating assembly 3. After the bearing housing 1 is placed on the mounting platform 2, it can be positioned in the same orientation to correspond to both the front heating assembly 4 and the rear heating assembly 3, ensuring that both the front and rear bearing outer ring mounting surfaces of the bearing housing 1 are heated. Therefore, during the installation of the front bearing outer ring 6 and the rear bearing outer ring 5, it is not necessary to change the orientation of the bearing housing 1 through a secondary aerial flip.

[0047] Furthermore, the mounting platform 2 may include a base, a bearing housing support, a lifting support, a lifting drive, and a guide. The bearing housing support is disposed on the base and supports the bearing housing 1. The lifting support is movable relative to the base, and a front outer ring support assembly is disposed on the lifting support. The lifting drive is connected between the base and the lifting support, and is used to drive the lifting support to move axially along the bearing housing 1. The guide is connected between the base and the lifting support, or disposed on the relative movement path of the base and the lifting support, and is used to guide the movement direction of the lifting support.

[0048] Specifically, the base can be a frame base, a plate base, or a load-bearing structure formed by multiple steel sections, support beams, and connecting plates. The base can be equipped with anchor holes, leveling feet, lifting holes, positioning slots, or mounting holes. Anchor holes are used to fix the base to the ground foundation or the support base of the assembly station. Leveling feet are used to adjust the level of the base. Lifting holes are used for transporting the base or the entire mounting platform 2. Positioning slots and mounting holes are used to install the bearing housing load-bearing part, the front outer ring load-bearing assembly, the front heating assembly 4, the rear heating assembly 3, or other auxiliary components.

[0049] As an alternative implementation, the base can be a one-piece welded structure. This structure can be formed by welding multiple crossbeams, longitudinal beams, and reinforcing beams, and the locations for installing the lifting load, support base, and heating components can be machined after welding.

[0050] As an alternative implementation, the base can be a detachable and modular structure. Multiple base modules are connected by bolts, pins, or locating keys to form a single base, facilitating transportation and on-site installation.

[0051] As an alternative implementation, the base can be equipped with a replaceable mounting plate, and bearing seats 1 of different specifications can be adapted to the support point position and heating component installation position by replacing the mounting plate.

[0052] Furthermore, the bearing housing support portion may include multiple support seats. These support seats are spaced apart circumferentially along the bearing housing 1 to support the bearing housing 1 from multiple locations. Since the shape and weight distribution of the wind turbine bearing housing 1 may be irregular, the multiple support seats can be arranged according to the outer contour, bottom support surface, or process support points of the bearing housing 1. At least one support seat may be equipped with a height adjustment component for adjusting the support height of the bearing housing 1 on the mounting platform 2.

[0053] As an optional implementation, the height adjustment component can be an adjusting screw. A threaded hole is provided on the support base, and the adjusting screw mates with the threaded hole. The upper end of the adjusting screw supports the bearing seat 1 or a pad located below the bearing seat 1. Rotating the adjusting screw changes the height of the support point.

[0054] As an optional implementation, the height adjustment component can be a hydraulic support component, which can adjust the support height through hydraulic pressure and can maintain the support position through a locking structure after adjustment.

[0055] As an optional implementation, the height adjustment component can be a set of shims, which can be used to adjust the support height by adding or removing shims of different thicknesses.

[0056] Furthermore, the support base may also be equipped with a bearing housing positioning part. The bearing housing positioning part is used to limit the horizontal displacement of the bearing housing 1 on the mounting platform 2. The bearing housing positioning part can be a positioning block, positioning pin, positioning boss, limit baffle, or clamping block.

[0057] As an alternative implementation, the positioning block abuts against the outer side wall or bottom flange of the bearing housing 1 to restrict the horizontal movement of the bearing housing 1.

[0058] As an optional implementation, a locating pin is inserted into a process hole or mounting hole on the bearing housing 1 to define the position of the bearing housing 1 relative to the base.

[0059] As an optional implementation, the clamping block is disposed on the outer periphery of the bearing housing 1 and connected to the support seat by bolts, thereby limiting and fixing the bearing housing 1 after it is placed in place.

[0060] Furthermore, to accommodate bearing housings 1 of different specifications, the support base can be detachably connected to the base. Multiple sets of mounting holes can be provided on the base, and the support base can be fixed using different mounting holes according to the specifications of the bearing housing 1.

[0061] As an optional implementation, the base is provided with an adjustment groove extending radially thereon, and the support is connected to the adjustment groove by bolts. The support can move along the adjustment groove and be locked in a predetermined position.

[0062] As an optional implementation, a positioning key is provided on the support base, and a keyway that mates with the positioning key is provided on the base. The mate between the positioning key and the keyway improves the repeatability of the support base installation position.

[0063] Furthermore, the bearing housing support section can also be equipped with an initial positioning structure and a repositioning structure. The initial positioning structure is used for coarse positioning when the bearing housing 1 is hoisted to the installation platform 2, and the repositioning structure is used to reposition the relative position between the bearing housing 1 and the front outer ring support assembly after the bearing housing 1 is placed.

[0064] Specifically, the initial positioning structure can be an inlet ramp or a flared guide block, so that the bearing housing 1 can first contact the inlet ramp and be guided to the predetermined area during the descent.

[0065] The repositioning structure can be a telescopic positioning pin, an adjustable positioning block, or a positioning pressure plate. After the bearing seat 1 is placed, the repositioning structure abuts against the reference surface of the bearing seat 1 or is inserted into the reference hole of the bearing seat 1.

[0066] Furthermore, the bearing housing can also be equipped with an attitude detection device. This device is used to detect the attitude of the bearing housing 1 on the mounting platform 2. The attitude detection device can be a level, tilt sensor, laser rangefinder, contact displacement sensor, or dial indicator.

[0067] As an optional implementation, multiple laser rangefinders are spaced apart along the circumference of the bearing housing 1 and detect the height at different positions on the bearing housing 1. Based on the multiple height detection values, it can be determined whether the bearing housing 1 is tilted.

[0068] As an optional implementation, the attitude detection component is linked with the height adjustment component. When it is detected that one side of the bearing housing 1 is too high or too low, it can be adjusted by the height adjustment component.

[0069] Furthermore, the lifting support unit is used to support the front outer ring support assembly and drive the front bearing outer ring 6 to move axially along the bearing housing 1. The lifting support unit can be a lifting platform, lifting tray, lifting frame, or lifting support beam. The lifting support unit can be located inside the bearing housing support unit, or at one end or below the bearing housing support unit, depending on the direction in which the front bearing outer ring 6 enters the front bearing outer ring mounting surface of the bearing housing 1.

[0070] Specifically, the lifting drive component can be a hydraulic cylinder. One end of the hydraulic cylinder is connected to the base, and the other end is connected to the lifting support unit. When the hydraulic cylinder extends or retracts, the lifting support unit can drive the outer ring 6 of the front bearing to move axially.

[0071] As an optional implementation, the lifting drive can be a screw lifting mechanism. The screw lifting mechanism includes a screw, a nut seat, and a drive motor. The drive motor drives the screw to rotate, and the nut seat moves axially with the rotation of the screw, thereby moving the lifting bearing part.

[0072] As an optional implementation, the lifting drive can be an electric actuator. One end of the electric actuator is connected to the base, and the other end is connected to the lifting support unit. When the electric actuator extends or retracts, it drives the lifting support unit to move.

[0073] As an alternative implementation, the lifting drive can employ a rack and pinion mechanism. The rack is arranged axially, and the gear is driven by a motor and meshes with the rack, thereby moving the lifting support unit.

[0074] As an optional implementation, the lifting drive can employ multiple synchronous cylinders, which are arranged circumferentially or along the edge of the lifting load. The lifting load is kept moving smoothly by means of a synchronous valve or a mechanical synchronous structure.

[0075] Furthermore, the lifting drive component can be equipped with a multi-stage speed control structure. Specifically, when the outer ring 6 of the front bearing is far from the mounting surface of the outer ring of the front bearing, the lifting drive component moves the outer ring 6 of the front bearing at a first speed; when the outer ring 6 of the front bearing approaches the mounting surface of the outer ring of the front bearing, it moves the outer ring 6 of the front bearing at a second speed lower than the first speed; when the outer ring 6 of the front bearing enters the mounting surface of the outer ring of the front bearing and is close to the final position, it moves at a third speed lower than the second speed for contact movement. The above-mentioned multi-stage speed control can be implemented by a hydraulic speed regulating valve, a motor frequency converter, a servo controller, or a proportional valve, and the specifics will not be elaborated further.

[0076] Furthermore, the guide component may include a guide post and a guide sleeve. One of the guide post and the guide sleeve is disposed on the base, and the other is disposed on the lifting bearing section. The guide post is slidably inserted into the guide sleeve. When the outer ring bearing assembly drives the outer ring 6 of the front bearing to rise or fall, the guide post and the guide sleeve can limit the lateral displacement of the lifting bearing section.

[0077] As an alternative implementation, the guide can be a linear guide rail and a slider. The linear guide rail extends axially along the bearing housing 1, and the slider slides into the linear guide rail.

[0078] As an alternative implementation, the guide member can be a guide groove and a guide protrusion. The guide groove is disposed on the base, and the guide protrusion is disposed on the lifting support part, with the guide protrusion moving within the guide groove.

[0079] As an optional implementation, the guide can be a cross guide mechanism, which is disposed between the base and the lifting support part to limit the tilt of the lifting support part.

[0080] Furthermore, the installation platform 2 may also include a lifting limit component. The lifting limit component is used to limit the lowest and highest positions of the lifting support unit. Specifically, the lifting limit component can be a mechanical limit block, a limit screw, a limit switch, or a displacement sensor.

[0081] As an optional implementation, a mechanical limit block is provided at the rising end point of the lifting bearing. When the lifting bearing reaches the predetermined position, the mechanical limit block abuts against the lifting bearing to prevent the outer ring 6 of the front bearing from continuing to move.

[0082] As an optional implementation, a displacement sensor is set to detect the position of the lifting load and send the position signal to the controller, which then controls the lifting drive to stop.

[0083] As an optional implementation, two limit switches are provided, one for the upper limit and one for the lower limit, to detect the starting and ending positions of the lifting load.

[0084] Furthermore, the mounting platform 2 may also include an alignment detection structure. The alignment detection structure is used to detect the coaxiality between the outer ring 6 of the front bearing and the mounting surface of the outer ring of the front bearing of the bearing housing 1. The alignment detection structure may include a distance sensor mounted on the lifting support section, or it may include a positioning reference component mounted on the bearing housing support section.

[0085] As an optional implementation, multiple ranging sensors are spaced apart circumferentially along the outer ring 6 of the front bearing to detect the distance between the outer circumference of the outer ring 6 and the corresponding inner wall of the bearing housing 1. If the difference between multiple ranging values ​​exceeds a predetermined range, the positioning part of the outer ring or the bearing housing bearing part can be adjusted to re-align the outer ring 6 of the front bearing with the mounting surface of the outer ring of the bearing at the front end of the bearing housing 1.

[0086] As an optional implementation, the centering detection structure can be a mechanical centering rod, with one end of the mechanical centering rod abutting against the outer ring 6 of the front bearing and the other end abutting against the reference surface of the bearing housing 1. The abutting state of multiple mechanical centering rods is used to determine whether the outer ring 6 of the front bearing is eccentric.

[0087] Furthermore, the front outer ring bearing assembly may include an outer ring bearing seat and a front outer ring positioning part. The outer ring bearing seat is disposed on the lifting bearing part and is used to support the front bearing outer ring 6. The front outer ring positioning part is disposed on the outer ring bearing seat or the lifting bearing part and is used to restrict the radial movement of the front bearing outer ring 6 relative to the lifting bearing part.

[0088] Specifically, the outer ring bearing seat can be an annular bearing seat. The annular bearing seat corresponds to the annular structure of the outer ring 6 of the front bearing and can support the end face of the outer ring 6 of the front bearing.

[0089] As an optional implementation, the outer ring support can be multiple support blocks, which are spaced apart circumferentially and jointly support the outer ring 6 of the front bearing.

[0090] As an optional implementation, the outer ring bearing seat can be a bearing seat with support rollers, which are used to support the outer ring 6 of the front bearing and allow the outer ring 6 of the front bearing to rotate at a small angle during positioning and adjustment.

[0091] As an optional implementation, the outer ring bearing seat can be provided with a heat-resistant pad or a buffer pad to reduce the local contact stress between the front bearing outer ring 6 and the outer ring bearing seat.

[0092] Furthermore, the front outer ring positioning part may include a plurality of positioning blocks spaced apart circumferentially. The plurality of positioning blocks are arranged around the front bearing outer ring 6 and mate with the inner or outer circumferential surface of the front bearing outer ring 6. At least one positioning block can be radially adjusted in position to position the front bearing outer ring 6 with different outer or inner diameters.

[0093] As an optional implementation, the front outer ring positioning part can be an annular positioning platform, with the front bearing outer ring 6 sleeved on the outer periphery of the annular positioning platform or placed inside the annular positioning platform. The annular positioning platform achieves radial positioning by cooperating with the inner or outer diameter of the front bearing outer ring 6.

[0094] As an optional implementation, the front outer ring positioning part may include multiple adjustable positioning claws, each positioning claw being distributed circumferentially and capable of synchronously approaching or moving away from the front bearing outer ring 6 radially.

[0095] As an optional implementation, the outer ring support is provided with a tapered guide portion, so that when the front bearing outer ring 6 is placed on the outer ring support, the front bearing outer ring 6 can approach the predetermined center position along the tapered guide portion.

[0096] Furthermore, the front outer ring bearing assembly may also include a fine-tuning mechanism. This fine-tuning mechanism is used to adjust the radial position of the front bearing outer ring 6 before or during lifting or lowering. The fine-tuning mechanism may include a radially arranged adjusting screw connected to a positioning block; rotating the adjusting screw changes the position of the positioning block.

[0097] As an optional implementation, the fine-tuning mechanism includes two adjustment components arranged perpendicular to each other, which are used to adjust the position of the outer ring 6 of the front bearing in the first radial direction and the second radial direction, respectively.

[0098] As an optional implementation, the fine-tuning mechanism adopts a wedge-driven structure, in which the wedge moves and drives the positioning block to move radially.

[0099] As an optional implementation, the fine-tuning mechanism employs a servo push rod, which automatically adjusts the position of the outer ring 6 of the front bearing based on the detection results of the centering detection structure.

[0100] Furthermore, the front outer ring carrier assembly may also include a circumferential positioning element. The circumferential positioning element defines the circumferential position of the front bearing outer ring 6 relative to the outer ring carrier. For a front bearing outer ring 6 having a connecting hole, a locating hole, or an end face mark, the circumferential positioning element can mate with the corresponding hole or mark to maintain a predetermined angle when the front bearing outer ring 6 enters the front bearing outer ring mounting surface of the bearing housing 1. The circumferential positioning element can be a locating pin, a stop block, or a removable limiting rod.

[0101] As an optional implementation, the circumferential positioning component is a retractable positioning pin. After the outer ring 6 of the front bearing is placed on the outer ring carrier, the retractable positioning pin extends into the positioning hole of the outer ring 6 of the front bearing. Before the outer ring 6 of the front bearing is installed into the bearing housing 1, the retractable positioning pin can be retracted to avoid affecting the outer ring 6 of the front bearing detaching from the outer ring carrier.

[0102] As an optional implementation, the circumferential positioning element is a removable stop, meaning that the stop can be removed after the outer ring 6 of the front bearing is positioned.

[0103] Specifically, the front-end heating assembly 4 includes a variable-diameter heating element 43, a drive assembly, a guide rail 46, and a variable-diameter connecting rod 45. The variable-diameter heating element 43 is used for electromagnetic induction heating of the front bearing outer ring mounting surface of the bearing housing 1. The guide rail 46 is used to guide the variable-diameter heating element 43 to move radially along the bearing housing 1. The variable-diameter connecting rod 45 connects the drive assembly and the variable-diameter heating element 43, so that the drive assembly drives the variable-diameter heating element 43 to move radially along the bearing housing 1 via the variable-diameter connecting rod 45.

[0104] Furthermore, combined Figures 6 to 9 ,in, Figure 6 This is a cross-sectional view of the variable diameter heating element 43 in a retracted state. Figure 7 This is a top view of the variable diameter heating element 43 in its retracted state. Figure 8 This is a cross-sectional view of the variable diameter heating element 43 in its unfolded state. Figure 9 This is a top view of the variable diameter heating element 43 in its unfolded state.

[0105] The drive assembly may include a screw jack 41, a drive motor 47, a lifting connecting plate 44, and a mounting base 42. The screw jack 41 is mounted on the mounting base 42, the drive motor 47 is connected to the screw jack 41, and the lifting connecting plate 44 is connected to the output end of the screw jack 41. A variable diameter connecting rod 45 connects the lifting connecting plate 44 and the variable diameter heating element 43. A guide rail 46 is disposed on the moving path of the variable diameter heating element 43, and the variable diameter heating element 43 slides in engagement with the guide rail 46.

[0106] When the drive motor 47 is working, the screw jack 41 drives the lifting connecting plate 44 to move, and the lifting connecting plate 44 drives the variable diameter heating element 43 to move along the guide rail 46 via the variable diameter connecting rod 45.

[0107] It should be explained that when the variable diameter heating element 43 is in the extended state, it can approach the front bearing outer ring mounting surface of the bearing housing 1, enabling it to heat the front bearing outer ring mounting surface. When the variable diameter heating element 43 is in the retracted state, it can leave the movement path of the front bearing outer ring 6, allowing the front bearing outer ring 6 to be driven by the front outer ring bearing support assembly and enter the front bearing outer ring mounting surface. The aforementioned extended and retracted states are used to illustrate the switching relationship between the heating position and the avoidance position of the variable diameter heating element 43, and do not require the variable diameter heating element 43 to adopt a unique variable diameter structure.

[0108] Specifically, the variable-diameter heating element 43 includes multiple arc-shaped segments spaced circumferentially along the bearing housing 1. In the heating state, the multiple arc-shaped segments are arranged together around the mounting surface of the front bearing outer ring to form a heating area for the mounting surface of the front bearing outer ring. In the clearance state, at least some of the arc-shaped segments move radially toward the center of the bearing housing, thereby clearing the axial movement path of the front bearing outer ring 6.

[0109] As an optional implementation method, refer to Figure 7 and Figure 9 Each of the multiple arc segments can be radially contracted inward by at least 200mm to allow space for the outer ring 6 of the front bearing to move on the outer periphery.

[0110] As an alternative implementation, multiple arc segments can be radially recessed outwards, creating a space on the inner side for the outer ring 6 of the front bearing to pass through.

[0111] As an alternative implementation, only part of the arc segment can move, while the other part of the arc segment is fixed. An obstacle avoidance channel is formed by changing the distance between the movable coil segment and the fixed coil segment.

[0112] As an alternative implementation, multiple arc segments can rotate about their respective axes, causing the arc segments to rotate from around the heating position to a position deviating from the movement path of the outer ring 6 of the front bearing.

[0113] Furthermore, the variable-diameter heating element 43 can be configured with a segmented energizing structure. Multiple arc-shaped segments can be connected to the heating power source separately and can be energized in groups.

[0114] As an alternative implementation, the multiple arc segments are divided into at least two groups, with the arc segments closest to the thick-walled region of the bearing housing 1 being energized first, and the remaining arc segments being energized then.

[0115] As an optional implementation, the power of multiple arc segments is adjusted in groups based on the temperature detection results of different areas of the mounting surface of the outer ring of the front bearing.

[0116] As an optional implementation, multiple arc segments are energized simultaneously during the heating phase and then energized in groups intermittently during the temperature equalization phase.

[0117] Furthermore, the front-end heating assembly 4 can be equipped with a coil position holding structure. The coil position holding structure is used to limit unintended movement of the variable-diameter heating element 43 when it is in the heating position or the avoidance position. The coil position holding structure can be a pin, a locking screw, a pneumatic locking element, a spring-loaded latch, or an electromagnetic lock.

[0118] As an optional implementation, after the variable diameter heating element 43 is moved to the heating position, the pin is inserted into the positioning hole between the coil seat and the support frame to maintain the relative position of the variable diameter heating element 43 and the mounting surface of the outer ring of the front bearing.

[0119] As an optional implementation, after the variable-diameter heating element 43 moves to the avoidance position, it is attracted to the coil seat by an electromagnetic lock to prevent the coil from returning to its original position during the movement of the outer ring 6 of the front bearing. This coil position holding structure can be linked with the control unit, and the corresponding heating or lifting action is only allowed when the coil position holding structure is in the locked state.

[0120] Furthermore, the variable diameter connecting rod 45 can be a straight rod or a connecting rod with a hinged end.

[0121] As an optional implementation, one end of the variable diameter connecting rod 45 is hinged to the lifting connecting plate 44, and the other end is hinged to the variable diameter heating element 43 or the coil seat supporting the variable diameter heating element 43. When the lifting connecting plate 44 moves, the variable diameter connecting rod 45 can convert the displacement of the lifting connecting plate 44 into the radial displacement of the variable diameter heating element 43.

[0122] As an optional implementation, the variable diameter connecting rod 45 can be connected to the slider, the slider moves along the guide rail 46, and the variable diameter heating element 43 is fixedly or detachably mounted on the slider.

[0123] As an optional implementation, the variable diameter connecting rod 45 can be a telescopic rod structure, which can adapt to distance changes at different positions during the movement of the variable diameter heating element 43, and reduce the sway of the variable diameter heating element 43 during radial movement.

[0124] Furthermore, the mounting base 42 can be fixed to the mounting platform 2 or to the support frame of the front heating component 4. The screw jack 41 can be arranged vertically or in a direction compatible with the movement direction of the lifting connecting plate 44. The drive motor 47 can be a servo motor, a stepper motor, or a geared motor.

[0125] As an optional implementation, the drive assembly may further include a position detection element for detecting whether the variable-diameter heating element 43 is in a heating position or a clearance position. The position detection element can be a limit switch, proximity switch, encoder, or displacement sensor. By using the position detection element, the movement of the front outer ring bearing assembly can be limited when the variable-diameter heating element 43 has not reached the clearance position, thereby reducing the possibility of component interference.

[0126] As an alternative implementation, the drive assembly can also be a hydraulic cylinder. The cylinder body of the hydraulic cylinder is fixed to the support frame, and the piston rod of the hydraulic cylinder is connected to the variable diameter heating element 43 or the coil seat. When the hydraulic cylinder extends or retracts, it drives the variable diameter heating element 43 to move along the guide rail 46.

[0127] As an alternative implementation, the drive component can be a cylinder, which drives the variable diameter heating element 43 to switch between a heating position and a avoidance position.

[0128] As an alternative implementation, the drive assembly can be a rack and pinion mechanism, with the rack connected to the variable diameter heating element 43, and the gear driven by a motor and meshing with the rack.

[0129] As an alternative implementation, the drive assembly can employ a cam-linkage mechanism, where the cam rotates and drives multiple coil segments to move synchronously via the link.

[0130] Furthermore, the front-end heating assembly 4 may also include a coil support and an insulating component. The coil support is used to support the variable-diameter heating element 43, and the insulating component is disposed between the variable-diameter heating element 43 and the coil support, or between the variable-diameter heating element 43 and the mounting platform 2, to reduce the possibility of unintended conduction during the heating process.

[0131] As an optional implementation, the outer periphery of the variable diameter heating element 43 is provided with a heat-resistant insulating layer.

[0132] As an optional implementation, the variable diameter heating element 43 is provided with a cooling channel for introducing a cooling medium to control the temperature of the coil itself when the variable diameter heating element 43 is in operation.

[0133] As an optional implementation, the variable diameter heating element 43 is connected to the power source via a flexible conductive connector to accommodate the movement of the variable diameter heating element 43 between the extended and retracted states.

[0134] As an optional implementation, cable drag chains can be provided at the inlet and outlet ends of the variable diameter heating element 43. The cable drag chains are used to guide the power supply cable to move with the variable diameter heating element 43, reducing cable bending and tangling.

[0135] Furthermore, the front-end heating assembly 4 may also include a temperature sensing element. The temperature sensing element can be used to detect the temperature at the mounting surface of the outer ring of the bearing at the front end of the bearing housing 1. The temperature sensing element can be an infrared temperature sensor, a thermocouple, or a contact temperature probe.

[0136] As an optional implementation, multiple temperature sensing elements are arranged at circumferential intervals along the mounting surface of the outer ring of the front bearing to detect the heating status at different circumferential positions.

[0137] As an optional implementation, the temperature sensing element is connected to the heating power controller, and the heating power controller adjusts the heating power or heating time of the variable diameter heating element 43 according to the temperature feedback from the temperature sensing element.

[0138] Furthermore, the front-end heating assembly 4 can perform staged heating. Specifically, the staged heating can include a preheating stage, a heating stage, a temperature equalization stage, and a heat preservation stage. In the preheating stage, the variable-diameter heating element 43 preheats the mounting surface of the front bearing outer ring with a first power, gradually increasing the temperature of the mounting surface. In the heating stage, the variable-diameter heating element 43 heats with a second power greater than the first power, raising the mounting surface of the front bearing outer ring to the target temperature range. In the temperature equalization stage, the variable-diameter heating element 43 intermittently heats or heats with low power with a third power less than the second power, keeping the temperature difference between the circumferential and axial directions of the mounting surface of the front bearing outer ring within a predetermined range. In the heat preservation stage, before or after the variable-diameter heating element 43 moves to the avoidance position, short-term supplementary heating or heat preservation is performed based on the temperature status fed back by the temperature detection element to reduce the temperature drop from the completion of heating to the installation of the front bearing outer ring 6.

[0139] As an optional implementation, the preheating stage can first heat the end region of the outer ring mounting surface of the front bearing, and then heat the inner region of the outer ring mounting surface of the front bearing.

[0140] As an optional implementation, during the temperature equalization stage, if multiple temperature sensors detect that the circumferential temperature difference exceeds a predetermined range, the control unit can increase the power of the arc segment corresponding to the lower temperature area or decrease the power of the arc segment corresponding to the higher temperature area.

[0141] As an optional implementation, during the heat preservation and installation stage, after the variable diameter heating element 43 is in the avoidance position, it can still be heated at low power through a portion of the coil segment, as long as the heating does not obstruct the movement path of the outer ring 6 of the front bearing.

[0142] Furthermore, the rear-end heating assembly 3 may include a rear-end heating element and a rear-end coil support. The rear-end heating element is disposed on the rear-end coil support and corresponds to the rear bearing outer ring mounting surface of the bearing housing 1. The rear-end coil support is connected to the mounting platform 2 and can move the rear-end heating element closer to or further away from the rear bearing outer ring mounting surface. Specifically, the rear-end coil support may be disposed on the mounting platform 2 or on a support frame adjacent to the mounting platform 2, as long as the rear-end heating element corresponds to the rear bearing outer ring mounting surface of the bearing housing 1.

[0143] Specifically, the rear coil support may include a support beam, a mounting base, and a coil fixing base. The support beam is connected to the mounting platform 2, the mounting base is disposed on the support beam, the coil fixing base is disposed on the mounting base, and the rear heating element is mounted on the coil fixing base.

[0144] As an optional implementation, the rear coil support includes a sliding seat and a sliding guide rail. The sliding guide rail is mounted on the mounting platform 2, and the sliding seat and the sliding guide rail are slidably engaged. The rear heating element is mounted on the sliding seat. By pushing the sliding seat, the rear heating element can be moved closer to or further away from the mounting surface of the outer ring of the rear bearing.

[0145] As an optional implementation, the rear coil support includes a rotating arm, and the rear heating element is disposed on the rotating arm. The rotating arm is capable of rotating about a fulcrum so that the rear heating element rotates from the heating position to the avoidance position.

[0146] As an optional implementation, the rear heating element is a split coil, which includes multiple coil segments. After heating is completed, the multiple coil segments can be separated and removed, thereby leaving space for the installation of the rear bearing outer ring 5.

[0147] Furthermore, the rear heating element can be a monolithic toroidal coil, an open-type toroidal coil, or a multi-segment arc-shaped coil. A monolithic toroidal coil is suitable for situations where the rear space can be moved in and out as a whole. An open-type toroidal coil can avoid the local protrusions on the bearing housing 1 through its opening. A multi-segment arc-shaped coil can be installed and removed separately, suitable for situations where the rear space of the bearing housing 1 is limited.

[0148] As an alternative implementation, the rear heating element can also be provided with a movable structure, so that the rear heating element is in a position close to the mounting surface of the outer ring of the rear bearing when heating, and moves to a clearance position before the outer ring 5 of the rear bearing is installed.

[0149] Furthermore, the rear heating assembly 3 can also be equipped with a temperature sensing element. The temperature sensing element is used to detect the temperature of the bearing outer ring mounting surface at the rear end of the bearing housing 1.

[0150] As an optional implementation, the rear heating component 3 and the front heating component 4 are connected to different heating power sources so as to control the heating power of the front and rear ends respectively.

[0151] As an optional implementation, the front heating component 4 and the rear heating component 3 share the same heating power supply, and power is supplied to the variable diameter heating element 43 and the rear heating element respectively through a switching switch or a power distribution module.

[0152] As an optional implementation, the front heating component 4 and the rear heating component 3 can be started at the same time, or the start-up time can be staggered according to the size, thickness and material condition of the front and rear mounting surfaces.

[0153] Furthermore, the back-end heating component 3 can also perform staged heating. The staged heating of the back-end heating component 3 can be performed synchronously with the front-end heating component 4, or it can be performed off-peak with the front-end heating component 4.

[0154] As an optional implementation, the front heating component 4 enters the heating stage first, while the rear heating component 3 enters the heating stage later, so that the mounting surface of the front bearing outer ring reaches the installation conditions first and the front bearing outer ring 6 is installed; during the installation and pressure holding of the front bearing outer ring 6, the rear heating component 3 continues to equalize or keep the rear bearing outer ring mounting surface warm.

[0155] As an optional implementation, the front heating component 4 and the rear heating component 3 enter the preheating stage simultaneously, and then enter the heating stage and the temperature equalization stage respectively according to their respective temperature detection results.

[0156] As an optional implementation, after the front heating component 4 completes heating and avoids obstruction, the rear heating component 3 enters the heat preservation and installation stage to ensure that the installation surface of the rear bearing outer ring 5 is still within the required installation temperature range when it is hoisted.

[0157] Further, the front outer ring clamping assembly may include a front clamping member, a front connecting member, and a front hydraulic cylinder. The front connecting member is used to connect with the bearing housing 1. The front hydraulic cylinder is disposed between the front connecting member and the front clamping member, and is used to apply an axial clamping force to the front bearing outer ring 6 through the front clamping member. Specifically, the front clamping member may be a front clamping ring, which corresponds to the front bearing outer ring 6 and is capable of abutting against the end face of the front bearing outer ring 6. The front connecting member may be multiple front connecting rods, which are spaced apart circumferentially along the front clamping ring. One end of the front connecting rod is connected to the bearing housing 1, and the other end provides reaction force support for the front hydraulic cylinder. One end of the front hydraulic cylinder cooperates with the front connecting rod, and the other end cooperates with the front clamping ring, so that the front clamping ring abuts against the front bearing outer ring 6.

[0158] Specifically, the front clamping ring can be a single, integral ring. The integral ring can continuously press against the end face of the outer ring 6 of the front bearing circumferentially.

[0159] As an optional implementation, the front clamping member can be composed of multiple arc-shaped pressure plates arranged circumferentially and applying clamping force to different circumferential areas of the outer ring 6 of the front bearing respectively.

[0160] As an optional implementation, the front clamping member may include a clamping ring and a plurality of clamping blocks disposed on the clamping ring, the plurality of clamping blocks respectively abutting against the end face of the outer ring 6 of the front bearing.

[0161] As an optional implementation, a heat-resistant pad, a buffer pad, or a replaceable pressure pad can be provided between the front clamping member and the front bearing outer ring 6 to reduce local indentations or to accommodate different sizes of the front bearing outer ring 6.

[0162] Furthermore, there can be multiple front hydraulic cylinders, which are spaced apart circumferentially along the outer ring 6 of the front bearing. These multiple front hydraulic cylinders can be evenly distributed circumferentially, or they can be non-uniformly distributed according to the force requirements of the outer ring 6 of the front bearing.

[0163] As an optional implementation, multiple front cylinders are connected through the same pressure supply line so that the multiple front cylinders can operate under the same pressure.

[0164] As an optional implementation, multiple front cylinders are divided into multiple groups, and each group of front cylinders is controlled by an independent pressure supply branch so as to adjust the local clamping force according to the contact state of different areas of the outer ring 6 of the front bearing.

[0165] As an optional implementation, the front clamping component can be composed of multiple segmented clamping plates, each segmented clamping plate corresponding to at least one front hydraulic cylinder, and the multiple segmented clamping plates together apply clamping force to different areas around the outer ring of the front bearing.

[0166] Furthermore, the front outer ring clamping assembly can employ a graded pressure-holding method. This graded pressure-holding method can include a pre-pressing stage, a main pressure stage, and a pressure-stabilizing stage. In the pre-pressing stage, the front cylinder pushes the front clamping member to contact the front bearing outer ring 6 with a first pressure, establishing contact between the end face of the front bearing outer ring 6 and the front clamping member. In the main pressure stage, the front cylinder applies an axial clamping force to the front bearing outer ring 6 with a second pressure greater than the first pressure, causing the front bearing outer ring 6 to fit against the front bearing outer ring mounting surface of the bearing housing 1. In the pressure-stabilizing stage, the hydraulic pump station supplements pressure based on the detection results of the pressure detection device, maintaining the front cylinder pressure within the set pressure range.

[0167] As an optional implementation, after the pre-compression stage is completed, a predetermined time can be paused to allow the outer ring 6 of the front bearing to adjust its position under stress before entering the main compression stage.

[0168] As an optional implementation, during the main pressure stage, multiple front cylinders can be pressurized in a circumferential sequence, first pressurizing the cylinders on opposite sides, and then pressurizing the remaining cylinders.

[0169] As an optional implementation, during the pressure stabilization stage, if the pressure of a certain pressure supply branch drops, then only that pressure supply branch is repressurized.

[0170] Furthermore, the front connector and bearing housing 1 can be connected by bolts, studs, tie rods, or snap-fit ​​connections. When the front connector is connected by bolts or studs, the bearing housing 1 can utilize existing mounting holes or have connecting holes for connecting the front outer ring clamping assembly. It should be explained that in this embodiment, the bolts or studs are mainly used to establish the connection between the front connector and bearing housing 1 and the reaction path of the front hydraulic cylinder. The holding pressure of the front bearing outer ring 6 is mainly provided by the front hydraulic cylinder.

[0171] Furthermore, the front outer ring clamping assembly can also be equipped with a front clamping guide. The front clamping guide is used to guide the front clamping member to move axially along the bearing housing 1. The front clamping guide can be a guide rod and guide hole, or a guide pin and guide sleeve.

[0172] As an optional implementation, a guide hole is provided on the front clamping ring, and a guide rod is provided on the front connector. The guide rod passes through the guide hole to limit the radial displacement of the front clamping ring during the hydraulic cylinder push.

[0173] As an optional implementation, multiple guide pins are provided on the front clamping member, and a guide sleeve that cooperates with the guide pins is provided on the bearing seat 1 or the front connecting member to ensure the movement direction of the front clamping member.

[0174] Furthermore, the front outer ring clamping assembly can also be equipped with a clamping displacement detection element. The clamping displacement detection element is used to detect the amount of axial displacement of the front clamping element, or to detect changes in the fit between the front bearing outer ring 6 and the bearing housing 1. The clamping displacement detection element can be a displacement sensor or a contact probe.

[0175] As an optional implementation, multiple clamping displacement detection elements are arranged circumferentially to detect the axial displacement of the outer ring 6 of the front bearing at different circumferential positions. If the difference between multiple axial displacement values ​​exceeds a predetermined range, the pressure of each group of front hydraulic cylinders can be adjusted to ensure that the outer ring 6 of the front bearing is subjected to balanced force.

[0176] Furthermore, the lifting and pressure-holding assembly 7 includes a lifting frame, a rear outer ring connector, a rear clamping member, and a rear hydraulic cylinder. The lifting frame is provided with a lifting connection part, which is used to cooperate with a crane, gantry crane, sling, or hook. The rear outer ring connector is disposed on the lifting frame and is used to connect the rear bearing outer ring 5. The rear hydraulic cylinder is disposed between the lifting frame and the rear clamping member and is used to apply axial clamping force to the rear bearing outer ring 5 through the rear clamping member.

[0177] Specifically, the lifting frame may include an annular lifting beam and lifting lugs disposed on the annular lifting beam. The annular lifting beam is adapted to fit the annular structure of the rear bearing outer ring 5, and the lifting lugs are used for connection with lifting equipment. The rear outer ring connector may include multiple rear outer ring connecting rods, which are spaced apart circumferentially along the annular lifting beam. One end of each rear outer ring connecting rod is connected to the annular lifting beam, and the other end is used to connect to the rear bearing outer ring 5. The rear clamping member may be a rear clamping ring, which abuts against the end face of the rear bearing outer ring 5. Multiple rear hydraulic cylinders are spaced apart circumferentially along the rear clamping ring and located between the annular lifting beam and the rear clamping ring.

[0178] As an optional implementation, the lifting frame can be a cross-beam structure. The cross-beam structure includes two intersecting beams, with the ends of the beams connected to the outer rear ring connectors, and a lifting connection section located in the middle of the beams.

[0179] As an alternative implementation, the lifting frame can be a frame structure, which includes multiple circumferential beams and radial beams. The circumferential beams are arranged around the outer ring 5 of the rear bearing, and the radial beams are used to connect the circumferential beams and the central lifting part.

[0180] As an alternative implementation, the lifting frame can be a modular structure, with multiple modular sections arranged around the outer ring 5 of the rear bearing and connected into a whole by connectors. The modular structure facilitates the installation and disassembly of the lifting and pressure-holding assembly 7 in space-constrained situations.

[0181] Furthermore, the rear outer ring connector can be a clamping member that clamps the inner or outer circumference of the rear bearing outer ring 5 so that the rear bearing outer ring 5 can be hoisted along with the hoisting frame.

[0182] As an optional implementation, the rear outer ring connector can be a bolted connector, which is connected to the rear bearing outer ring 5 through a process hole or a connection hole on the rear bearing outer ring 5.

[0183] As an alternative implementation, the rear outer ring connector can be a combination of a locating pin and a clamping block. The locating pin is used to define the position of the rear bearing outer ring 5 relative to the lifting frame, and the clamping block is used to prevent the rear bearing outer ring 5 from detaching from the lifting frame during the lifting process.

[0184] As an alternative implementation, the rear outer ring connector may include an adjustable connector that can be adjusted radially to accommodate rear bearing outer rings 5 ​​of different outer diameters.

[0185] Furthermore, the lifting and pressure-holding assembly 7 may include a lifting attitude adjustment mechanism. This mechanism is used to adjust the tilt state of the rear bearing outer ring 5 during the lifting process. The lifting attitude adjustment mechanism may include multiple adjustable lifting points or adjustable slings.

[0186] As an optional implementation, multiple lifting points are set on the annular lifting beam, and each lifting point is connected to the lifting equipment with an adjustable sling. The posture of the outer ring 5 of the rear bearing is adjusted by adjusting the length of the adjustable sling.

[0187] As an optional implementation, a horizontal detection device is installed on the lifting frame to detect the tilt angle of the lifting frame and adjust the lifting points according to the tilt angle.

[0188] As an optional implementation, a counterweight mounting position is provided on the lifting frame, and the center of gravity of the lifting frame and the outer ring 5 of the rear bearing is adjusted by changing the position of the counterweight.

[0189] Furthermore, the rear clamping component can be a rear clamping ring. The rear clamping ring can be an integral ring or composed of multiple arc-shaped clamping plates. The rear clamping ring corresponds to the end face of the outer ring 5 of the rear bearing and can apply axial clamping force to the outer ring 5 of the rear bearing under the action of the rear hydraulic cylinder.

[0190] As an optional implementation, a plurality of clamping blocks are provided on the rear clamping ring, and the plurality of clamping blocks are arranged at intervals along the circumference and abut against the outer ring 5 of the rear bearing.

[0191] As an optional implementation, a replaceable pad is provided between the rear clamping member and the rear bearing outer ring 5 to accommodate rear bearing outer rings 5 ​​with different thicknesses or different end face structures.

[0192] Furthermore, the lifting and pressure-holding assembly 7 can also be equipped with a guide structure. The guide structure may include a guide rod disposed on the lifting frame and a guide sleeve disposed on the bearing housing 1 or the auxiliary support. When the rear bearing outer ring 5 moves toward the rear bearing outer ring mounting surface, the guide rod and the guide sleeve cooperate to limit the sway of the rear bearing outer ring 5.

[0193] As an optional implementation, the guide structure may include a tapered guide portion disposed on the rear clamping ring or the rear outer ring connector, for guiding the rear bearing outer ring 5 close to the rear bearing outer ring mounting surface of the bearing housing 1.

[0194] As an optional implementation, a posture adjustment component can be installed on the lifting frame. This component is used to adjust the angle of the outer ring 5 of the rear bearing relative to the bearing housing 1 during the lifting process. The posture adjustment component can be an adjustable lifting point or an adjustable sling.

[0195] Furthermore, the lifting and pressure-holding assembly 7 can also adopt a graded pressure-holding method.

[0196] After the rear bearing outer ring 5 enters the mounting surface of the rear bearing outer ring, the rear cylinder first applies a first pressure to pre-press, so that the rear clamping part establishes contact with the rear bearing outer ring 5 and the rear bearing outer ring 5 initially fits together.

[0197] Then, the second pressure is applied to apply the main pressure, so that the outer ring 5 of the rear bearing is further fitted to the mounting surface of the outer ring of the rear bearing.

[0198] Then, in the pressure stabilization stage, the pressure of the rear cylinder is maintained by supplementing pressure through the hydraulic pump station.

[0199] As an alternative implementation, the rear cylinders can be pressurized sequentially in circumferential groups to reduce the possibility of localized force on the outer ring 5 of the rear bearing causing misalignment.

[0200] As an optional implementation, the lifting and pressure holding assembly 7 is equipped with a rear clamping displacement detection device. The rear clamping displacement detection device is used to detect the axial displacement of the outer ring 5 of the rear bearing at different circumferential positions, and to adjust the pressure of different rear cylinder groups according to the detection results.

[0201] Furthermore, the rear hydraulic cylinder can be activated after the rear bearing outer ring 5 is installed in place, applying axial clamping force to the rear bearing outer ring 5 through the rear clamping member. After the rear bearing outer ring 5 is installed in place, the lifting frame can continue to be connected to the rear bearing outer ring 5 and used as part of the pressure-holding structure. Thus, the lifting and pressure-holding assembly 7 is used both for lifting the rear bearing outer ring 5 and for maintaining pressure on the rear bearing outer ring 5, thereby reducing the number of steps required to change between the lifting equipment and the pressure-holding equipment.

[0202] Furthermore, the installation system of the present invention may also include a hydraulic pump station. The hydraulic pump station is connected to at least one of the front cylinder and the rear cylinder. The hydraulic pump station may include a pressure detection element and a pressure compensation control element. The pressure detection element is used to detect the cylinder pressure, and the pressure compensation control element is used to control the hydraulic pump station to compensate for pressure when the cylinder pressure is lower than a set pressure. Specifically, the pressure detection element may be a pressure sensor, a pressure switch, or a pressure gauge, and the pressure compensation control element may be an electrically controlled valve assembly, a controller, a relay control circuit, or a mechanical pressure control valve.

[0203] Specifically, the hydraulic pump station can be connected to the front cylinder via a first pressure supply branch and to the rear cylinder via a second pressure supply branch. Pressure-holding valves can be installed on both the first and second pressure supply branches. These pressure-holding valves can be check valves, hydraulically controlled check valves, shut-off valves, or a pressure-holding valve assembly. When the pressure in the front or rear cylinder decreases, a pressure detection element can detect the pressure change, and the pressure replenishment control element controls the hydraulic pump station to replenish pressure to the corresponding cylinder based on the signal from the pressure detection element.

[0204] As an optional implementation, the front and rear cylinders share the same hydraulic pump station.

[0205] As an optional implementation, the front and rear cylinders are connected to different hydraulic pump stations.

[0206] As an alternative implementation, the hydraulic pump station may also include an accumulator connected to the pressure supply branch to provide pressure compensation in the event of pressure fluctuations.

[0207] Furthermore, the hydraulic pump station may include a zoned pressure-holding module. This module controls the pressure of multiple cylinder groups separately. Specifically, multiple front cylinders can be divided into at least two front cylinder groups, and multiple rear cylinders can be divided into at least two rear cylinder groups. Each cylinder group is equipped with a pressure detection element and a pressure-holding valve. A pressure compensation control element can compensate for the pressure of each cylinder group separately.

[0208] As an optional implementation, the two opposing cylinder groups use the same pressure compensation branch to ensure consistent pressure in their respective areas.

[0209] As an optional implementation, each cylinder group is equipped with an independent pressure compensation branch, and the control unit adjusts the pressure of each cylinder group according to the fitting status feedback from the displacement detection device.

[0210] Furthermore, the hydraulic pump station can also be equipped with a relief valve, a safety valve, and a manual pressure relief valve. The relief valve is used to limit the maximum pressure of the hydraulic system, the safety valve is used to release pressure in case of abnormal pressure, and the manual pressure relief valve is used to release the cylinder pressure after the pressure holding is completed.

[0211] As an optional implementation, the hydraulic pump station can also be equipped with a display unit, which is used to display the pressure value of the front or rear cylinder.

[0212] As an optional implementation, the hydraulic pump station can also be equipped with a recording unit to record pressure changes during the pressure holding process.

[0213] As an optional implementation, the hydraulic pump station can also be equipped with an alarm unit, which will issue a warning signal when the cylinder pressure is lower or higher than the set range.

[0214] Furthermore, the installation system may also include a control unit. The control unit can be connected to the lifting drive component, the front heating assembly 4, the rear heating assembly 3, the hydraulic pump station, the position detection component, the temperature detection component, the attitude detection component, the alignment detection structure, and the clamping displacement detection component, respectively. The control unit can be used to control the start and stop of the front heating assembly 4 and the rear heating assembly 3, and can also be used to control the movement of the variable diameter heating element 43, the lifting and lowering of the front outer ring bearing assembly, and the pressurization of the hydraulic pump station.

[0215] As an optional implementation, the control unit can be programmed as follows: When the variable-diameter heating element 43 has not moved to the avoidance position, the control unit restricts the front outer ring bearing assembly from rising. When the lifting bearing part is not in the initial position, the control unit restricts the bearing housing 1 from being hoisted into place. When the bearing housing 1 attitude detection result does not meet the predetermined conditions, the control unit restricts the activation of the front heating assembly 4 and the rear heating assembly 3. When the temperature detection element detects that the mounting surface has not reached the predetermined temperature range, the control unit restricts the front bearing outer ring 6 or the rear bearing outer ring 5 from entering the mounting surface.

[0216] As an optional implementation, the control unit determines whether the installation conditions for the front bearing outer ring 6 or the rear bearing outer ring 5 are met based on the detection results of the temperature detection element.

[0217] As an optional implementation, the control unit controls the hydraulic pump station to replenish pressure, replenish pressure in sections, or depressurize based on the detection results of the pressure detection device and the clamping displacement detection device.

[0218] In a second aspect of the invention, a method for installing the outer rings of the front and rear bearings of a wind turbine bearing housing is provided. This method can be implemented using the wind turbine bearing housing front and rear bearing outer ring installation system described in any of the above embodiments.

[0219] Specifically, before installation, the mounting platform 2 can be inspected to ensure the base is in a stable supporting state, the lifting support is in its initial position, the variable diameter heating element 43 in the front heating assembly 4 is in a predetermined position, and the rear heating assembly 3 can be moved closer to or further away from the rear bearing outer ring mounting surface. Subsequently, the front bearing outer ring 6 can be placed on the front outer ring support assembly, and its radial position can be limited by the front outer ring positioning part. The front heating assembly 4 and the rear heating assembly 3 can also be pre-set on the mounting platform 2, with the front heating assembly 4 corresponding to the front bearing outer ring mounting surface of the bearing housing 1, and the rear heating assembly 3 corresponding to the rear bearing outer ring mounting surface of the bearing housing 1.

[0220] Furthermore, after the front bearing outer ring 6 is placed on the front outer ring carrier assembly, a pre-positioning step for the front bearing outer ring 6 can be performed. This pre-positioning step may include radial positioning, circumferential positioning, and height positioning. In radial positioning, the radial position of the front bearing outer ring 6 is restricted by the front outer ring positioning part. In circumferential positioning, the connecting hole or process mark of the front bearing outer ring 6 is positioned at a predetermined angle by the circumferential positioning member. In height positioning, the front bearing outer ring 6 is adjusted to the initial height by the lifting carrier part.

[0221] As an optional implementation, the pre-positioning step may also include centering detection. If the coaxial deviation between the outer ring 6 of the front bearing and the mounting surface of the outer ring of the front bearing of the bearing housing 1 exceeds a predetermined range, the position of the outer ring 6 of the front bearing is adjusted by a fine-tuning mechanism.

[0222] Furthermore, the bearing housing 1 is hoisted onto the bearing housing support portion of the mounting platform 2, and supported by multiple support seats. After the bearing housing 1 is placed, its horizontal movement can be restricted by the bearing housing positioning portion. If the placement height or posture of the bearing housing 1 needs to be adjusted, it can be adjusted using the height adjustment components on the support seats to keep the bearing housing 1 in the same placement posture and to align the front bearing outer ring mounting surface of the bearing housing 1 with the front bearing outer ring 6.

[0223] As an optional implementation, the placement of bearing housing 1 can be detected by a level, laser alignment instrument, rangefinder or dial indicator.

[0224] As an optional implementation, the installation position of the bearing housing 1 can be determined by cooperating with the positioning element on the mounting platform 2 through the reference hole or reference surface on the bearing housing 1.

[0225] Furthermore, after the bearing housing 1 is placed in position, a bearing housing 1 attitude verification step can be performed. The attitude verification step may include detecting the height of the bearing housing 1 at multiple circumferential positions, detecting the coaxiality of the bearing outer ring mounting surface at the front end of the bearing housing 1 relative to the front bearing outer ring 6, and detecting whether the bearing housing 1 is stably supported by the support seat. If the detection results do not meet the predetermined requirements, the height adjustment component or the bearing housing positioning part is adjusted.

[0226] As an optional implementation, the attitude verification step is performed before heating.

[0227] As an optional implementation, the attitude verification step is performed again after heating and before the front bearing outer ring 6 is installed, in order to compensate for the local deformation of the bearing housing 1 or the change in the support state caused by heating.

[0228] Furthermore, the variable-diameter heating element 43 in the front heating assembly 4 is positioned in the heating position, and the rear heating element in the rear heating assembly 3 is positioned at the corresponding rear bearing outer ring mounting surface. The front heating assembly 4 and the rear heating assembly 3 heat the front bearing outer ring mounting surface and the rear bearing outer ring mounting surface of the bearing housing 1, respectively.

[0229] As an optional implementation, the front heating component 4 and the rear heating component 3 can be heated simultaneously.

[0230] As an optional implementation, the front heating component 4 and the rear heating component 3 can be activated sequentially and operate simultaneously for at least part of the time.

[0231] As an optional implementation, the front heating component 4 and the rear heating component 3 can be configured with heating power and heating time according to the size, material thickness or temperature of the front and rear mounting surfaces, respectively.

[0232] Specifically, during the heating process, the temperatures of the front and rear bearing outer ring mounting surfaces of the bearing housing 1 can be detected by temperature sensors. Once the front bearing outer ring mounting surface reaches a predetermined temperature range, the heating power of the front heating assembly 4 can be stopped or reduced. Similarly, once the rear bearing outer ring mounting surface reaches a predetermined temperature range, the heating power of the rear heating assembly 3 can be stopped or reduced.

[0233] As an optional implementation, the variable diameter heating element 43 and the rear heating element can be kept in a fixed position during the heating process.

[0234] As an optional implementation, the variable diameter heating element 43 can be moved slightly along the axial or radial direction during the heating process to improve the heating status of different areas of the mounting surface.

[0235] Furthermore, the mounting surfaces of the front and rear bearing outer rings can be heated in stages. This staged heating method can include a preheating stage, a heating stage, a homogenization stage, and a heat-preservation stage. In the preheating stage, heating is performed at a first power level to raise the mounting surface from ambient temperature to the preheating temperature range. In the heating stage, heating is performed at a second power level, which is greater than the first power, to raise the mounting surface to the target temperature range. In the homogenization stage, heating is maintained at a third power level or intermittent heating, where the third power is less than the second power, ensuring that the circumferential or axial temperature difference of the mounting surface remains within a predetermined range. In the heat-preservation stage, before the bearing outer ring is installed, low-power supplementary heating or intermittent supplementary heating is used to reduce temperature drop.

[0236] As an optional implementation, after the outer ring mounting surface of the front bearing has been uniformly heated, the variable diameter heating element 43 is moved to a clearance position before the heat preservation and installation stage is performed.

[0237] As an alternative implementation, the heat preservation and pre-installation stage is completed before the variable diameter heating element 43 moves to the avoidance position, and then the lifting and installation of the front bearing outer ring 6 is performed.

[0238] As an optional implementation, the mounting surface of the rear bearing outer ring continues to be homogenized or kept warm during the installation of the front bearing outer ring 6.

[0239] Furthermore, during the staged heating process, a temperature difference judgment step can be performed. Specifically, multiple temperature detection points are set circumferentially along the outer ring mounting surface of the front bearing. If the temperature difference between the multiple temperature detection points exceeds a predetermined range, the arc segment at the corresponding position is controlled to perform supplementary heating, or the temperature equalization stage is extended. Multiple temperature detection points can also be set circumferentially along the outer ring mounting surface of the rear bearing. If the circumferential temperature difference of the outer ring mounting surface of the rear bearing exceeds a predetermined range, the heating power of the rear heating element is adjusted, or the temperature equalization stage is extended.

[0240] As an optional implementation, the temperature difference judgment step may also include axial temperature difference judgment, that is, detecting the temperature difference between the inlet of the mounting surface and the interior of the mounting surface, and adjusting the position of the variable diameter heating element 43 or the heating time according to the temperature difference.

[0241] Furthermore, after the outer ring mounting surface of the front bearing is heated, the drive assembly moves the variable diameter heating element 43 from the heating position to the clearance position. Specifically, the drive motor 47 drives the screw jack 41 to move, the screw jack 41 moves the lifting connecting plate 44, and the lifting connecting plate 44 moves the variable diameter heating element 43 along the guide rail 46 via the variable diameter connecting rod 45, causing the variable diameter heating element 43 to leave the movement path of the front bearing outer ring 6. It should be noted that after the variable diameter heating element 43 moves to the clearance position, its position can be confirmed by a position detection component, or its clearance position can be limited by a mechanical limiting component.

[0242] Furthermore, after the variable diameter heating element 43 moves to the avoidance position, an avoidance confirmation step can be performed. The avoidance confirmation step may include detecting whether the variable diameter heating element 43 has reached the avoidance position, detecting whether the coil position holding structure is locked, and detecting whether there are any interfering elements on the movement path of the front bearing outer ring 6.

[0243] As an optional implementation, the obstacle avoidance confirmation step is performed by the position detection device and the control unit.

[0244] As an optional implementation, the avoidance confirmation step is completed through a combination of mechanical limiting devices and manual observation.

[0245] Furthermore, the front outer ring bearing assembly drives the front bearing outer ring 6 to move axially along the bearing housing 1, causing the front bearing outer ring 6 to enter the front bearing outer ring mounting surface of the bearing housing 1. Specifically, the lifting drive unit drives the lifting bearing part to move, the outer ring bearing housing moves with the lifting bearing part, and the front bearing outer ring 6 enters the front bearing outer ring mounting surface axially along with the outer ring bearing housing. The guide member guides the lifting bearing part during the lifting process, and the front outer ring positioning part restricts the radial displacement of the front bearing outer ring 6 during the lifting process. Thus, the front bearing outer ring 6 can be installed into the front bearing outer ring mounting surface while maintaining the same placement posture in the bearing housing 1.

[0246] Furthermore, the moving speed of the lifting bearing part can be controlled during the process of the front bearing outer ring 6 entering the front bearing outer ring mounting surface.

[0247] As an alternative implementation, the lifting speed is reduced when the outer ring 6 of the front bearing approaches the mounting surface of the outer ring of the front bearing, in order to reduce the possibility of collision between the outer ring 6 of the front bearing and the bearing housing 1.

[0248] As an alternative implementation, the lifting bearing can move in segments, first moving at a higher speed to the approach position, and then at a lower speed to send the front bearing outer ring 6 into the front bearing outer ring mounting surface.

[0249] As an optional implementation, the front outer ring bearing assembly can be equipped with a positioning detection element, which is used to detect whether the front bearing outer ring 6 has entered the predetermined installation position.

[0250] Furthermore, the axial movement of the front bearing outer ring 6 can be divided into an alignment section, an introduction section, an insertion section, and a final positioning section. In the alignment section, the front outer ring bearing assembly moves the front bearing outer ring 6 to an entry position close to the mounting surface of the front bearing outer ring, and the coaxiality of the front bearing outer ring 6 is confirmed by the alignment detection structure. In the introduction section, the front bearing outer ring 6 enters the entry point of the front bearing outer ring mounting surface at a low speed. In the insertion section, the front bearing outer ring 6 continues to move axially and gradually enters the mounting surface of the front bearing outer ring. In the final positioning section, the front bearing outer ring 6 moves to the predetermined final position at a speed lower than that in the insertion section.

[0251] As an optional implementation, if increased resistance or asynchronous displacement is detected on one side of the outer ring 6 of the front bearing in the import section, the lifting bearing unit stops moving and returns to a predetermined distance, and then re-imports after centering adjustment.

[0252] As an optional implementation, the positioning status is determined by a displacement sensor and a mechanical limiter in the positioning section.

[0253] Furthermore, after the front bearing outer ring 6 is installed in place, the fit between the front bearing outer ring 6 and the bearing housing 1 can be inspected.

[0254] As an alternative implementation, a feeler gauge can be used to detect the gap between the outer ring 6 of the front bearing and the bearing housing 1 at multiple points along the circumference of the outer ring 6 of the front bearing.

[0255] As an optional implementation, a detection clearance portion can be provided near the mating surface between the outer ring 6 of the front bearing and the bearing housing 1 to allow the feeler gauge to enter the detection position.

[0256] As an optional implementation, displacement detection devices, dial indicators, or contact measuring tools can be used to assist in determining whether the outer ring 6 of the front bearing is in place.

[0257] In specific applications, the fit between the outer ring 6 of the front bearing and the bearing housing 1 can be required to reach more than 95%, and the gap at the non-fitting part can be required to not exceed 0.05mm. This value can be used as an assembly quality control condition, but it is not intended to limit the entire scope of implementation of the present invention in other application scenarios.

[0258] Furthermore, the fit inspection can include an initial inspection and a re-inspection. The initial inspection is performed after the front bearing outer ring 6 is installed in place and before the front outer ring clamping assembly is pressurized, to determine whether the front bearing outer ring 6 is misaligned. The re-inspection is performed after the front outer ring clamping assembly is pre-pressurized or fully pressurized, to determine whether the fit between the front bearing outer ring 6 and the bearing housing 1 meets the requirements.

[0259] As an optional implementation, if a local gap is found to exceed the predetermined range during the initial inspection, the front outer ring bearing assembly can be retracted a short distance and re-inserted.

[0260] As an optional implementation method, if a gap in a certain area is found to be too large during the re-inspection, the pressure of the corresponding front cylinder group in that area can be increased or the pressure stabilization time can be extended.

[0261] Further, after the front bearing outer ring 6 is installed in place, the front outer ring clamping assembly is connected to the bearing housing 1. Specifically, the front connector is connected to the bearing housing 1, and the front hydraulic cylinder is positioned between the front connector and the front clamping assembly, so that the front clamping assembly corresponds to the end face of the front bearing outer ring 6. After starting the hydraulic pump station, the front hydraulic cylinder pushes the front clamping assembly against the front bearing outer ring 6, thereby applying an axial clamping force to the front bearing outer ring 6. When the pressure of the front hydraulic cylinder is lower than the set pressure, the hydraulic pump station can control the pressure supplementation through the pressure supplementation control assembly to maintain the pressure holding state of the front bearing outer ring 6. After the pressure holding is completed, the pressure of the front hydraulic cylinder can be released through the manual pressure relief valve or the automatic pressure relief valve.

[0262] Furthermore, the pressure holding of the outer ring 6 of the front bearing can be achieved through staged pressure holding and feedback pressure compensation. Staged pressure holding includes a pre-pressure stage, a main pressure stage, and a pressure stabilization stage.

[0263] During the pre-compression stage, the front hydraulic cylinder pushes the front clamping member against the outer ring 6 of the front bearing with the first pressure.

[0264] During the main pressure stage, the front cylinder applies axial pressure to the outer ring 6 of the front bearing with a second pressure greater than the first pressure.

[0265] During the pressure stabilization phase, the hydraulic pump station replenishes pressure based on the detection results of the pressure sensor to maintain the pressure of the front cylinder within the set range. During the feedback pressure replenishment phase, if the pressure sensor detects a pressure drop, the hydraulic pump station replenishes pressure; if the clamping displacement sensor detects insufficient displacement in a certain area, it replenishes pressure on the corresponding cylinder group in that area.

[0266] As an optional implementation, a waiting stage is set between the pre-compression stage and the main compression stage, so that the outer ring 6 of the front bearing can be adjusted in position under stress.

[0267] As an optional implementation, pressure and displacement are detected at fixed time intervals during the pressure stabilization phase.

[0268] As an optional implementation, pressure replenishment is only performed during the pressure stabilization phase when the pressure falls below a set lower limit.

[0269] Furthermore, after the rear bearing outer ring mounting surface is heated, the rear heating element is moved away from the rear bearing outer ring mounting surface. If the rear heating element is slidably mounted via the rear coil bracket, the rear coil bracket can move the rear heating element away from the rear end of the bearing housing 1. If the rear heating element is a split coil, each coil segment can be disassembled and removed. If the rear heating element is mounted on a rotating arm, the rear coil bracket can be rotated to move the rear heating element out of the entry space of the rear bearing outer ring 5.

[0270] Furthermore, after the rear heating element has left the mounting surface of the rear bearing outer ring, a rear clearance confirmation step can be performed. The rear clearance confirmation step is used to confirm that the rear heating element has left the lifting path of the rear bearing outer ring 5.

[0271] As an optional implementation, a position detection device is used to detect whether the rear coil bracket has moved to an avoidance position.

[0272] As an alternative implementation, the clearance position of the rear coil bracket is limited by a mechanical limiting component.

[0273] As an optional implementation, the control unit only allows the lifting and pressure-holding assembly 7 to enter the rear bearing outer ring mounting area after confirming that the rear heating element is in a clearance position.

[0274] Further, the rear bearing outer ring 5 is connected and hoisted via the lifting and pressure-holding assembly 7. Specifically, the rear outer ring connector is connected to the rear bearing outer ring 5, establishing a connection between the rear bearing outer ring 5 and the lifting frame. The lifting equipment lifts the rear bearing outer ring 5 via the lifting connection on the lifting frame and moves it to the rear bearing outer ring mounting surface of the bearing housing 1. After the rear bearing outer ring 5 enters the rear bearing outer ring mounting surface, the rear hydraulic cylinder applies axial clamping force to the rear bearing outer ring 5 via the rear clamping component. The rear hydraulic cylinder can be connected to a hydraulic pump station, which provides pressure and replenishes pressure to maintain the pressure-holding state of the rear bearing outer ring 5.

[0275] Furthermore, during the hoisting process of the rear bearing outer ring 5, a guide structure can be used to assist the rear bearing outer ring 5 in entering the mounting surface of the rear bearing outer ring.

[0276] As an optional implementation, the guide rod on the hoisting frame first engages with the guide sleeve on the bearing housing 1 or the auxiliary bracket, and then the outer ring 5 of the rear bearing enters the mounting surface of the outer ring of the rear bearing along the guiding direction of the guide rod.

[0277] As an optional implementation, the rear bearing outer ring 5 and the mounting surface of the rear bearing outer ring can be kept at a corresponding angle by adjusting the attitude adjustment component on the hoisting frame.

[0278] As an optional implementation, the position of the rear bearing outer ring 5 can be detected during the installation process using observation holes, inspection holes, or external measuring tools.

[0279] Furthermore, the hoisting and installation of the outer ring 5 of the rear bearing can be divided into a connecting section, a posture adjustment section, an introduction section, a fitting section, and a pressure holding and switching section.

[0280] In the connecting section, the rear outer ring connector is connected to the rear bearing outer ring 5.

[0281] In the attitude adjustment section, the tilt state of the outer ring 5 of the rear bearing is adjusted by the hoisting attitude adjustment mechanism.

[0282] In the inlet section, the guide structure guides the outer ring 5 of the rear bearing into the inlet of the mounting surface of the outer ring of the rear bearing.

[0283] As it is inserted into the section, the outer ring 5 of the rear bearing continues to enter the mounting surface of the outer ring of the rear bearing.

[0284] During the pressure holding switching section, after the outer ring 5 of the rear bearing is in place, the lifting pressure holding assembly 7 switches from the lifting state to the pressure holding state, and the rear hydraulic cylinder pushes the rear clamping component to pressurize the outer ring 5 of the rear bearing.

[0285] As an alternative implementation, during the pressure holding switching section, the lifting equipment keeps the lifting frame under control, but the rear hydraulic cylinder begins to bear the clamping effect.

[0286] As an optional implementation, the lifting frame is connected to the bearing housing 1 via a connector, and then pressure is maintained by the rear hydraulic cylinder.

[0287] Furthermore, the outer ring 6 of the front bearing and the outer ring 5 of the rear bearing can be pressurized separately, or they can be pressurized simultaneously for at least part of the time after installation.

[0288] As an alternative implementation, the front bearing outer ring 6 is installed first and pressure is maintained. During the pressure maintenance of the front bearing outer ring 6, the rear bearing outer ring 5 is installed and pressure is maintained on the rear bearing outer ring 5.

[0289] As an optional implementation, after the outer ring 6 of the front bearing and the outer ring 5 of the rear bearing are installed in place, pressure is supplied to the front cylinder and the rear cylinder simultaneously through the hydraulic pump station.

[0290] As an optional implementation, the outer ring 6 of the front bearing and the outer ring 5 of the rear bearing are pressure-held by different hydraulic pump stations so that the pressure holding pressure and pressure holding time can be set separately.

[0291] Furthermore, the outer ring 6 of the front bearing and the outer ring 5 of the rear bearing can adopt an overlapping pressure holding method. The overlapping pressure holding method means that the outer ring 6 of the front bearing first enters the pressure stabilization stage, and before the pressure stabilization stage of the outer ring 6 of the front bearing enters the installation and pressure holding process, so that the pressure stabilization stage of the outer ring 6 of the front bearing and the pre-pressure stage, main pressure stage or pressure stabilization stage of the outer ring 5 of the rear bearing at least partially overlap.

[0292] As an optional implementation, after the front bearing outer ring 6 enters the pressure stabilization stage, the rear heating assembly 3 enters the heat preservation and installation stage, and the hoisting of the rear bearing outer ring 5 begins.

[0293] As an optional implementation, after both the outer ring 6 of the front bearing and the outer ring 5 of the rear bearing enter the pressure stabilization stage, the hydraulic pump station monitors the pressure of the front cylinder and the rear cylinder respectively, and replenishes the pressure accordingly.

[0294] Furthermore, once the fit between the outer ring 6 of the current bearing and the outer ring 5 of the rear bearing and the bearing housing 1 meets the predetermined requirements, the pressure of the front and rear hydraulic cylinders can be released, and the front outer ring clamping assembly and the lifting and holding pressure assembly 7 can be removed. Specifically, the pressure release can be carried out in a step-by-step manner. The step-by-step pressure release method includes first reducing the cylinder pressure from the holding pressure to the intermediate pressure, maintaining it for a predetermined time, and then reducing it to the pressure release state.

[0295] As an optional implementation, the front and rear hydraulic cylinders are depressurized in stages.

[0296] As an optional implementation, the front and rear hydraulic cylinders are depressurized synchronously and in stages.

[0297] As an optional implementation, the displacement changes of the outer ring 6 of the front bearing and the outer ring 5 of the rear bearing are detected during the depressurization process. If the displacement changes exceed the predetermined range, the depressurization is stopped and the pressure is reapplied.

[0298] Furthermore, after depressurization, a final inspection step can be performed. This final inspection step is used to check the final installation status of the front bearing outer ring 6 and the rear bearing outer ring 5 relative to the bearing housing 1. The final inspection step may include feeler gauge testing, displacement testing, end face runout testing, or coaxiality testing.

[0299] As an optional implementation, the fit and gap between the non-fitted areas are checked again in the final inspection step.

[0300] As an optional implementation, the final inspection step involves checking the end face positions of the front bearing outer ring 6 and the rear bearing outer ring 5.

[0301] As an optional implementation, a test record is generated during the final inspection step and stored together with the heating temperature record and the holding pressure record.

[0302] Subsequently, the bearing housing 1, along with the front bearing outer ring 6 and the rear bearing outer ring 5 that have already been installed, can be removed from the mounting platform 2.

[0303] It should be further noted that the above embodiments are described using wind turbine bearing housing 1 as the assembly object. However, without departing from the concept of the present invention, this installation system can also be used for the installation of other large bearing housings, bases, or housing components with the front and rear bearing outer rings. As long as such components have two oppositely arranged bearing outer ring mounting surfaces and require heating, fitting, and pressure holding, the matching relationships between the installation platform 2, front heating component 4, rear heating component 3, front outer ring bearing component, front outer ring clamping component, and lifting and pressure holding component 7 in this invention can all be applied.

[0304] It should also be noted that the front heating assembly 4 and the rear heating assembly 3 are not limited to the specific structures shown in the attached drawings. The variable diameter heating element 43 in the front heating assembly 4 can be implemented in various ways, such as inward contraction, outward retraction, segmented opening, rotational relocation, or sliding relocation. The rear heating assembly 3 can be removed from the installation space of the rear bearing outer ring 5 by means of integral removal, sliding removal, rotational removal, or separate disassembly. The front outer ring bearing assembly can be a lifting bearing platform, lifting tray, lifting bracket, or a movable seat with a guide structure. The clamping elements in the front outer ring clamping assembly and the lifting and pressure holding assembly 7 can be integral ring parts or multiple separate clamping blocks. The above changes do not affect the technical content of the present invention, which uses the same installation platform 2 to support the bearing seat 1 and coordinates front and rear heating, axial movement of the front bearing outer ring 6, lifting of the rear bearing outer ring 5, and pressure holding to complete the installation of the front and rear bearing outer rings.

[0305] It should also be noted that the aspects of staged heating, zoned temperature control, alignment detection, avoidance confirmation, step-by-step insertion, graded pressure holding, overlapping pressure holding, step-by-step pressure release, and final inspection recording in this embodiment can be partially or fully adopted according to actual assembly conditions. The above-mentioned aspects are not required to exist simultaneously in every embodiment. As long as the installation system can support the bearing housing 1 via the installation platform 2 and cooperate with the front heating assembly 4, rear heating assembly 3, front outer ring support assembly, front outer ring clamping assembly, and lifting and pressure holding assembly 7 to complete the installation of the front and rear bearing outer rings, the basic technical content of this invention can be achieved. When it is necessary to further improve the controllability of the installation process, the above-mentioned detection, control, and step-by-step execution aspects can be combined.

[0306] It should also be noted that specific examples have been used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the present invention and its concept. For those skilled in the art, several changes can be made to the above embodiments without departing from the concept of the present invention. For example, the number and position of the support base, front cylinder, rear cylinder, positioning block, and coil segment can be adjusted; the type of lifting drive component and coil drive assembly can be changed; the number of pressure supply branches of the hydraulic pump station can be changed; and the size and bearing method of the mounting platform 2 can be adjusted according to the specifications of the bearing housing 1 and the outer ring of the bearing. These changes do not affect the implementation of the present invention and should all fall within the protection scope of the present invention.

Claims

1. A system for mounting the outer rings of the front and rear bearings of a wind turbine generator bearing housing, characterized in that, This includes an installation platform, a front-end heating component, a rear-end heating component, a front outer ring load-bearing component, a front outer ring clamping component, and a hoisting and pressure-holding component; The mounting platform is used to support the bearing housing; The front outer ring bearing assembly is disposed on the mounting platform and is used to drive the front bearing outer ring to move axially along the bearing housing; The front heating assembly and the rear heating assembly are respectively used to heat the front bearing outer ring mounting surface and the rear bearing outer ring mounting surface of the bearing housing, and the front heating assembly includes a variable diameter heating element that can avoid the movement path of the front bearing outer ring. The front outer ring clamping assembly is used to maintain pressure on the front bearing outer ring, and the lifting and pressure maintaining assembly is used to lift the rear bearing outer ring and maintain pressure on the rear bearing outer ring.

2. The wind turbine generator bearing housing front and rear bearing outer ring mounting system according to claim 1, characterized in that, The installation platform includes a base, a bearing seat support, a lifting support, a lifting drive component, and a guide component; The bearing housing support portion is disposed on the base and is used to support the bearing housing; The front outer ring bearing assembly is disposed on the lifting bearing part; The lifting drive component is connected between the base and the lifting support part, and is used to drive the lifting support part to move along the axial direction of the bearing seat; The guide member is used to guide the movement direction of the lifting support unit.

3. The wind turbine bearing housing front and rear bearing outer ring mounting system according to claim 2, characterized in that, The bearing housing bearing portion includes a plurality of support seats, which are spaced apart along the circumference of the bearing housing. At least one of the support seats is provided with a height adjustment element, which is used to adjust the support height of the bearing seat on the mounting platform; The front outer ring bearing assembly is provided with a front outer ring positioning part, which is used to limit the radial movement of the front bearing outer ring relative to the lifting bearing part.

4. The wind turbine bearing housing front and rear bearing outer ring mounting system according to claim 1, characterized in that, The front-end heating assembly also includes a drive assembly, a guide rail, and a variable-diameter connecting rod; The variable diameter heating element is slidably engaged with the guide rail; The variable diameter connecting rod is connected between the drive assembly and the variable diameter heating element, so that the drive assembly drives the variable diameter heating element to move radially along the bearing seat through the variable diameter connecting rod.

5. The wind turbine generator bearing housing front and rear bearing outer ring mounting system according to claim 4, characterized in that, The drive assembly includes a screw jack, a drive motor, a lifting connection plate, and a motor mounting base; The screw jack is mounted on the motor mounting base, the drive motor is connected to the screw jack in a transmission connection, and the lifting connecting plate is connected to the output end of the screw jack; The variable diameter connecting rod connects the lifting connecting plate and the variable diameter heating element; The variable diameter heating element includes multiple arc-shaped segments, which are spaced apart circumferentially along the bearing housing.

6. The wind turbine generator bearing housing front and rear bearing outer ring mounting system according to claim 1, characterized in that, The rear heating assembly includes a rear heating element and a rear coil support; The rear heating element is disposed on the rear coil bracket and corresponds to the rear bearing outer ring mounting surface of the bearing housing; The rear coil bracket is connected to the mounting platform and can move the rear heating element closer to or away from the rear bearing outer ring mounting surface.

7. The wind turbine generator bearing housing front and rear bearing outer ring mounting system according to claim 1, characterized in that, The front outer ring clamping assembly includes a front clamping component, a front connecting component, and a front hydraulic cylinder; The front connector is used to connect to the bearing housing; The front hydraulic cylinder is disposed between the front connecting member and the front clamping member, and is used to apply axial clamping force to the outer ring of the front bearing through the front clamping member; The number of front hydraulic cylinders is multiple, and the multiple front hydraulic cylinders are arranged at circumferential intervals along the outer ring of the front bearing.

8. The wind turbine bearing housing front and rear bearing outer ring mounting system according to claim 1, characterized in that, The lifting and pressure-holding assembly includes a lifting frame, a rear outer ring connector, a rear clamping component, and a rear hydraulic cylinder; The hoisting frame is equipped with a lifting connection part; The rear outer ring connector is disposed on the lifting frame and is used to connect the rear bearing outer ring; The rear hydraulic cylinder is positioned between the lifting frame and the rear clamping member, and is used to apply axial clamping force to the outer ring of the rear bearing through the rear clamping member.

9. The wind turbine bearing housing front and rear bearing outer ring mounting system according to claim 7 or 8, characterized in that, It also includes hydraulic pump stations; The hydraulic pump station is connected to at least one of the front cylinder and the rear cylinder; The hydraulic pump station includes a pressure detection device and a pressure compensation control device. The pressure detection device is used to detect the cylinder pressure, and the pressure compensation control device is used to control the hydraulic pump station to compensate for pressure when the cylinder pressure is lower than the set pressure.

10. A method for installing the outer rings of the front and rear bearings of a wind turbine generator bearing housing, characterized in that, The wind turbine generator bearing housing front and rear bearing outer ring mounting system according to any one of claims 1 to 9, the mounting method comprising: Place the bearing housing on the mounting platform and keep the bearing housing in the same placement posture; The front and rear bearing outer ring mounting surfaces of the bearing housing are heated by the front heating assembly and the rear heating assembly, respectively. The variable-diameter heating element in the front heating assembly avoids the movement path of the outer ring of the front bearing; The front outer ring is moved axially along the bearing housing by the front outer ring bearing assembly so that the front outer ring is installed into the front bearing outer ring mounting surface. The outer ring of the rear bearing is hoisted using a hoisting and pressure-holding assembly so that it is installed into the mounting surface of the outer ring of the rear bearing. Pressure is maintained on the outer rings of the front and rear bearings.

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