A device and method for adjusting the interference fit of the main shaft bearing of a wind turbine generator set.

Abstract

This application provides a device and method for adjusting the interference fit of a wind turbine generator main shaft bearing. The wind turbine generator main shaft bearing interference fit adjustment device, for installation within the main shaft of a wind turbine generator, includes: a central support assembly; a tensioning force applying assembly, mounted on the central support assembly, the tensioning force applying assembly having a tensioning force applying portion for applying a tensioning force to the inner wall of the wind turbine generator main shaft to increase the shaft diameter; and a tensioning force retaining assembly, mounted on the central support assembly, the tensioning force retaining assembly having a tensioning force retaining portion for maintaining the expanded shaft diameter of the wind turbine generator main shaft unchanged. This eliminates the problem of main shaft bearing misalignment and provides better performance.

Description

Technical Field

[0001] This application relates to the technical field of wind turbine generator installation equipment, and in particular to a wind turbine generator main shaft bearing interference adjustment device and method. Background Technology

[0002] The main shaft of a wind turbine generator set is the core component that transmits torque. It adopts a hollow structure design and mainly connects the wind turbine blades to the base of the wind turbine generator set, undertaking the functions of mechanical energy transmission and load support.

[0003] After installation, wind turbine main shaft bearings may experience "running" due to insufficient interference fit between the bearing inner ring and the main shaft, or insufficient main shaft rigidity. This means the bearing inner ring rotates relative to the wind turbine main shaft. This causes main shaft wear, increased clearance, and potentially more serious consequences.

[0004] When lap speed issues occur, there are currently three ways to handle them: 1. Remove the turret and replace the spindle. 2. Add a retaining pin between the spindle and the inner ring of the bearing. 3. Add a shrink sleeve between the spindle and the bearing. All three solutions face the problems of high cost and complex, difficult implementation. Summary of the Invention

[0005] Based on this, this application provides a device and method for adjusting the interference fit of the main shaft bearing of a wind turbine generator set, which can solve the problem of the main shaft bearing running around the main shaft of the wind turbine generator set.

[0006] This application provides an interference fit adjustment device for the main shaft bearing of a wind turbine generator set, which is installed inside the main shaft of the wind turbine generator set, including:

[0007] Central support component;

[0008] The tensioning force application assembly is installed on the central support assembly. The tensioning force application assembly is provided with a tensioning force application part, which is used to apply a tensioning force to the inner wall of the wind turbine main shaft to increase the shaft diameter.

[0009] The tension retention assembly is installed on the central support assembly and has a tension retention part, which is used to keep the diameter of the wind turbine main shaft unchanged after expansion.

[0010] An interference fit adjustment device for the main shaft bearing of a wind turbine generator set according to an embodiment of this application has at least the following beneficial effects: By adjusting the tensioning force application component, the tensioning force application part of the tensioning force application component applies a tensioning force that increases the shaft diameter to the inner wall of the main shaft of the wind turbine generator set. As the expansion force increases, the shaft diameter of the main shaft of the wind turbine generator set continuously increases until the interference fit of the main shaft bearing of the wind turbine generator set reaches a preset value, so that the interference fit of the main shaft bearing of the wind turbine generator set meets the engineering requirements, thereby eliminating the problem of main shaft bearing misalignment. After the interference fit of the main shaft bearing of the wind turbine generator set reaches the preset value, the tensioning force application part is removed from the inner wall of the main shaft of the wind turbine generator set, and the interference fit of the main shaft bearing of the wind turbine generator set is maintained by the tensioning force holding component. The tensioning force holding component is simpler and more reliable in structure than the tensioning force application component, effectively reducing costs and improving operational stability.

[0011] According to some embodiments of this application, the tensioning force application assembly includes a telescopic support member and a telescopic control system. The telescopic support member is fixedly installed on the central support assembly. The telescopic end of the telescopic support member faces the inner wall of the wind turbine generator main shaft and can move radially along the wind turbine generator main shaft. The telescopic support member has multiple telescopic ends. The telescopic ends of the telescopic support member are arranged in a ring around the axial direction of the wind turbine generator main shaft to form a tensioning force application part. The telescopic control system is connected to the telescopic support member to control the telescopic movement of the telescopic ends of the telescopic support member.

[0012] In this embodiment, when the tensioning force applying part applies a tensioning force to the inner wall of the wind turbine main shaft to increase the shaft diameter, under the control of the telescopic control system, the telescopic end of the telescopic support extends towards the inner wall of the wind turbine main shaft and abuts against the inner wall of the wind turbine main shaft. By controlling the extension length of the telescopic end of the telescopic support, the tensioning force can be continuously increased. The shaft diameter of the wind turbine main shaft is expanded under the action of the tensioning force until the interference fit of the wind turbine main shaft bearing reaches the preset value, so that the interference fit of the wind turbine main shaft bearing meets the engineering requirements, thereby eliminating the problem of the main shaft bearing running out of circles.

[0013] According to some embodiments of this application, the telescopic support includes multiple hydraulic cylinders, which are mounted on a central support assembly. The multiple hydraulic cylinders are arranged in a ring around the axial direction of the wind turbine main shaft. The telescopic control system includes a hydraulic control device and a hydraulic circuit, with the hydraulic control device connected to the hydraulic cylinders via the hydraulic circuit.

[0014] In this embodiment, the telescopic support consists of multiple hydraulic cylinders. The base of each hydraulic cylinder is mounted on the central support assembly. The multiple hydraulic cylinders are arranged in a ring around the axial direction of the wind turbine main shaft. The piston rods of the hydraulic cylinders face the inner wall of the wind turbine main shaft. The hydraulic control device controls the supply of oil to the hydraulic cylinders through the hydraulic oil circuit, controlling the extension and retraction of the piston, and thus controlling the tension force. By controlling the oil supply, the tension force and interference fit can be precisely controlled.

[0015] According to some embodiments of this application, multiple hydraulic cylinders are arranged in parallel.

[0016] In this embodiment, since the hydraulic cylinders are of the same model and have the same load, the parallel arrangement of the hydraulic cylinders can make the piston rods of all the hydraulic cylinders evenly supported on the inner wall of the wind turbine main shaft, so that the inner wall of the wind turbine main shaft is subjected to uniform force in all directions.

[0017] According to some embodiments of this application, the central support assembly is provided with a first mounting countersunk hole, and the hydraulic cylinder is detachably mounted in the first mounting countersunk hole.

[0018] In this embodiment, during the installation of the hydraulic cylinders, they can be quickly and accurately installed in their corresponding positions, ensuring that the installed hydraulic cylinders are evenly spaced. Setting the mounting structure between the hydraulic cylinders and the first mounting countersunk hole within the first mounting countersunk hole allows for a more compact central support assembly and avoids the risk of damage to the exposed mounting structure.

[0019] According to some embodiments of this application, the tension retention assembly includes a plurality of telescopic retaining rods. The fixed ends of the telescopic retaining rods are fixedly installed on the central support assembly. The telescopic ends of the telescopic retaining rods face the inner wall of the wind turbine main shaft and can move radially along the wind turbine main shaft. The plurality of telescopic retaining rods are arranged in a ring around the axial direction of the wind turbine main shaft, and the telescopic ends of the plurality of telescopic retaining rods constitute the tension retention part.

[0020] In this embodiment, the tension retention assembly consists of multiple telescopic retaining rods. When the tension retention part keeps the diameter of the expanded wind turbine main shaft unchanged, the fixed end of the telescopic retaining rod is installed on the central support assembly. The telescopic end of the telescopic retaining rod extends towards the inner wall of the wind turbine main shaft until it abuts against the inner wall of the wind turbine main shaft, ensuring sufficient support force. Then, the telescopic retaining rod is locked to maintain its length, thus ensuring that the diameter of the expanded wind turbine main shaft remains unchanged. This also ensures that the inner wall of the wind turbine main shaft is subjected to uniform force in all directions.

[0021] According to some embodiments of this application, the central support assembly is provided with a second mounting countersunk hole, and the fixed end of the telescopic retaining rod is installed in the second mounting countersunk hole.

[0022] In this embodiment, the mounting structure between the telescopic retaining rod and the second mounting countersunk hole is set inside the second mounting countersunk hole, which makes the central support assembly more compact and avoids the risk of damage to the mounting structure due to exposure.

[0023] According to some embodiments of this application, the number of telescopic retaining rods is consistent with the number of hydraulic cylinders, and the telescopic retaining rods and hydraulic cylinders are arranged alternately on the central support assembly.

[0024] In this embodiment, when the hydraulic cylinder removes its supporting force, the telescopic retaining rod provides support at a position adjacent to the hydraulic cylinder, ensuring that the inner wall of the wind turbine main shaft is subjected to uniform force in all directions.

[0025] This application also discloses a method for adjusting the interference fit of the main shaft bearing of a wind turbine generator set, using the aforementioned wind turbine generator set main shaft bearing interference fit adjustment device. The adjustment method includes:

[0026] Adjust the tensioning force application component to apply tensioning force to the inner wall of the wind turbine main shaft until the interference fit of the wind turbine main shaft bearing reaches the preset value;

[0027] Adjust the tension retention assembly to keep the main shaft diameter of the wind turbine generator set unchanged after expansion;

[0028] The tensioning force applied to the inner wall of the wind turbine main shaft is removed.

[0029] The method for adjusting the interference fit of the main shaft bearing of a wind turbine generator according to an embodiment of this application has at least the following advantages: Compared with current methods for adjusting the interference fit of the main shaft bearing of a wind turbine generator, the method provided in this application eliminates the need to remove the main shaft of the wind turbine generator from the tower, thus improving its operability. The interference fit adjustment device for the main shaft bearing of the wind turbine generator consists of multiple small components, facilitating transfer and transportation.

[0030] According to some embodiments of this application, it also includes:

[0031] When it is determined that the tension holding component has malfunctioned, the tension applying component is readjusted so that the tension applying part applies tension force to the inner wall of the wind turbine main shaft until the interference fit of the wind turbine main shaft bearing reaches the preset value.

[0032] Replace the faulty tension retention component and remove the tension force applied by the tension application part from the inner wall of the wind turbine main shaft.

[0033] In this embodiment, the repair of a faulty tension holding component can be completed quickly, making operation and maintenance simple and convenient.

[0034] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the wind turbine generator main shaft bearing interference adjustment device and method provided by this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A schematic diagram of the interference fit adjustment device for the main shaft bearing of a wind turbine generator set provided in an embodiment of this application;

[0037] Figure 2 for Figure 1 Cross-sectional view along the AA direction.

[0038] Explanation of reference numerals in the attached figures:

[0039] 100 - Central support component;

[0040] 200-Tightening force application assembly; 201-Tightening force application part; 210-Telescopic support; 221-Hydraulic control device; 222-Hydraulic circuit; 220-Telescopic control system;

[0041] 300 - Main shaft of wind turbine generator set;

[0042] 400 - Tension force retaining assembly; 401 - Tension force retaining part. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0046] The terms "first," "second," and "third" (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0047] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or display that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or display.

[0048] Currently, with the increasing size of wind turbine units, the main bearing technology has been entirely converted to dual TRB bearings. After installation, due to insufficient interference fit between the inner ring of the main bearing and the main shaft, as well as insufficient rigidity of the main shaft, the main shaft bearing exhibits a "running" phenomenon, meaning that the inner ring of the bearing rotates relative to the main shaft of the wind turbine unit. This causes wear on the main shaft, increased clearance, and ultimately, more serious consequences.

[0049] Therefore, refer to Figure 1 and Figure 2 As shown, this application discloses an interference fit adjustment device for the main shaft bearing of a wind turbine generator set, which is used for installation inside the main shaft of the wind turbine generator set, and includes:

[0050] Central support component 100;

[0051] The tensioning force application assembly 200 is installed on the central support assembly 100. The tensioning force application assembly 200 is provided with a tensioning force application part 201, which is used to apply a tensioning force to the inner wall of the wind turbine main shaft 300 to increase the shaft diameter.

[0052] The tension retention assembly 400 is installed on the central support assembly 100. The tension retention assembly 400 is provided with a tension retention part 401, which is used to keep the shaft diameter of the wind turbine generator main shaft 300 unchanged after expansion.

[0053] The central support assembly 100 serves to provide mounting support for other accessories and can be a block-shaped, spherical, or other structure. The central support assembly 100 may have mounting holes for bolts, fixing pins, and other mounting structures; no restrictions are placed on this. The tension force application assembly 200 and the tension force retention assembly 400 are mounted and fixed to the central support assembly 100 via mounting structures or other means.

[0054] When maintenance personnel discover that the wind turbine main shaft bearing is "running around" due to insufficient interference fit after installation or due to prolonged operation, the interference fit adjustment device should be installed inside the wind turbine main shaft, specifically at the location of the corresponding bearing.

[0055] By adjusting the tensioning force application component 200, the tensioning force application part 201 of the tensioning force application component 200 applies an increasing tensioning force to the inner wall of the wind turbine generator main shaft 300. As the expansion force increases, the shaft diameter of the wind turbine generator main shaft 300 continuously increases until the interference fit of the wind turbine generator main shaft bearing reaches a preset value, ensuring that the interference fit of the wind turbine generator main shaft bearing meets engineering requirements, thereby eliminating the problem of main shaft bearing misalignment. The preset tensioning force can be obtained through simulation.

[0056] After the interference fit of the wind turbine main shaft bearing reaches the preset value, the tension force holding assembly 400 is adjusted. The tension force holding part 401 keeps the shaft diameter of the expanded wind turbine main shaft 300 unchanged, thereby maintaining the interference fit of the wind turbine main shaft bearing and ensuring stable operation of the wind turbine. Subsequently, the tension force application part 201 is released from the tension force on the inner wall of the wind turbine main shaft 300, and the tension force holding assembly 400 maintains the interference fit of the wind turbine main shaft bearing.

[0057] It should be noted that the tensioning force application component 200 applies an increasing tensioning force to the inner wall of the wind turbine main shaft 300, which is a force that gradually increases. Therefore, the tensioning force application component 200 is generally a hydraulic device or a motor device with a telescopic support mechanism. These types of devices are characterized by complex structures and high costs. If the tensioning force application component 200 continues to apply tensioning force after the interference fit of the wind turbine main shaft bearing meets the engineering requirements, the tensioning force application component 200 needs to remain continuously operational. This results in high operating costs and poor system stability. Moreover, due to the complex structure of the tensioning force application component 200, a large layout space and a complex fixing mechanism are required to ensure the stability of the tensioning force application component 200 during wind turbine operation.

[0058] Taking the hydraulic cylinder as an example of the tensioning force application component 200, to ensure that the inner wall of the wind turbine main shaft 300 receives a uniform tensioning force, multiple hydraulic cylinders need to be arranged in a ring. During the operation of the hydraulic cylinders, a hydraulic system including a hydraulic pump, hydraulic valves, and hydraulic pipelines is also required. If, after the interference fit of the wind turbine main shaft bearings meets the engineering requirements, the hydraulic cylinders continue to apply tensioning force, they need to remain continuously operational, and the hydraulic oil in the oil circuit must be kept at high pressure. Therefore, the hydraulic valves and hydraulic pipelines need to be continuously running. The entire system is quite complex, has high operating costs, and is prone to failure.

[0059] In this application, after the interference fit of the wind turbine generator main shaft bearing reaches a preset value, the tensioning force of the tensioning force application part 201 on the inner wall of the wind turbine generator main shaft 300 is removed. The interference fit of the wind turbine generator main shaft bearing is maintained by the tensioning force holding component 400. The tensioning force application component 200 can be in a non-working state, and can even be removed from the central support component 100 after operation. The tensioning force holding component 400 only needs to provide a stable supporting force, and can commonly be various supporting rods, such as support rods, lead screw structures, etc. The tensioning force holding component 400 has a simpler structure than the tensioning force application component 200, effectively reducing costs, and only needs to withstand simple mechanical forces, resulting in higher stability.

[0060] refer to Figure 1 and Figure 2 As shown, in some embodiments of this application, the tensioning force application assembly 200 includes a telescopic support member 210 and a telescopic control system 220. The telescopic support member 210 is fixedly installed on the central support assembly 100. The telescopic end of the telescopic support member 210 faces the inner wall of the wind turbine generator main shaft 300 and can move radially along the wind turbine generator main shaft 300. The telescopic support member 210 is provided with multiple telescopic ends. The telescopic ends of the telescopic support member 210 are arranged in a ring around the axial direction of the wind turbine generator main shaft 300 to form a tensioning force application part 201. The telescopic control system 220 is connected to the telescopic support member 210 to control the telescopic movement of the telescopic ends of the telescopic support member 210.

[0061] In this embodiment, when the tensioning force applying part 201 applies a tensioning force to increase the shaft diameter to the inner wall of the wind turbine main shaft 300, under the control of the telescopic control system 220, the telescopic end of the telescopic support 210 extends toward the inner wall of the wind turbine main shaft 300 and abuts against the inner wall of the wind turbine main shaft 300. By controlling the extension length of the telescopic support 210, the tensioning force can be continuously increased. The shaft diameter of the wind turbine main shaft 300 is expanded under the action of the tensioning force until the interference of the wind turbine main shaft bearing reaches the preset value, so that the interference of the wind turbine main shaft bearing meets the engineering requirements, thereby eliminating the problem of the main shaft bearing running.

[0062] It should be noted that both the wind turbine main shaft 300 and the wind turbine main shaft bearing are circular structures. The enlarged shaft diameter of the wind turbine main shaft 300 requires maintaining a uniform circular cross-section to ensure the uniformity of the force applied between it and the wind turbine main shaft bearing. To this end, the telescopic support 210 is provided with multiple telescopic ends, and these ends are arranged in a ring around the axial direction of the wind turbine main shaft 300 to form a tensioning force application part 201. This ensures that the inner wall of the wind turbine main shaft 300 is subjected to uniform force in all directions, maintaining the uniform circular shape of the enlarged shaft diameter.

[0063] refer to Figure 1 and Figure 2 As shown, in some embodiments of this application, the telescopic support 210 includes a plurality of hydraulic cylinders, which are mounted on the central support assembly 100. The plurality of hydraulic cylinders are arranged in a ring around the axial direction of the wind turbine main shaft 300. The telescopic control system 220 includes a hydraulic control device 221 and a hydraulic circuit 222. The hydraulic control device 221 is connected to the hydraulic cylinders through the hydraulic circuit 222.

[0064] In this embodiment, the telescopic support 210 consists of multiple hydraulic cylinders. The base of each hydraulic cylinder is mounted on the central support assembly 100. The multiple hydraulic cylinders are arranged in a ring around the axial direction of the wind turbine main shaft 300. The piston rods of the hydraulic cylinders face the inner wall of the wind turbine main shaft 300. The hydraulic control device 221 mainly includes a hydraulic pump, a hydraulic oil tank, and control valves. The hydraulic control device 221 controls the supply of oil to the hydraulic cylinders through the hydraulic oil circuit 222, controlling the extension and retraction of the piston, and thus controlling the tension force. By using a hydraulic system to control the tension force, the tension force and interference fit can be precisely controlled by controlling the oil supply.

[0065] In some embodiments of this application, multiple hydraulic cylinders are connected in parallel.

[0066] In this embodiment, the hydraulic cylinders are connected in parallel, meaning that the rodless or rod-type chambers of all cylinders are connected to the same pressure oil source and return oil circuit, and all parallel branches share the system pressure. In this embodiment, since the hydraulic cylinders are of the same model and have the same load, the parallel connection ensures that the piston rods of all hydraulic cylinders are evenly supported on the inner wall of the wind turbine main shaft 300, resulting in uniform force acting on the inner wall of the wind turbine main shaft 300 in all directions.

[0067] In some embodiments, each hydraulic cylinder can also be connected to an independent hydraulic system, with each hydraulic system independently supplying oil to its corresponding hydraulic cylinder, thus achieving the purpose of controlling the tightening force. To ensure that the piston rod of each hydraulic cylinder can extend and retract synchronously, a synchronous start-up system is set up to control the synchronous operation of each hydraulic system.

[0068] In some embodiments of this application, the central support assembly 100 is provided with a first mounting countersunk hole, and the hydraulic cylinder is detachably mounted in the first mounting countersunk hole.

[0069] In this embodiment, by providing a first mounting countersunk hole in the central support component 100, the number of the first mounting countersunk holes corresponds to the number of hydraulic cylinders, so that each hydraulic cylinder can be detachably installed in the first mounting countersunk hole.

[0070] During the production process, the central support assembly 100 has pre-drilled first mounting countersunk holes, which are evenly spaced on the central support assembly 100. This allows the hydraulic cylinders to be quickly and accurately installed in their corresponding positions, ensuring that the installed hydraulic cylinders are evenly spaced.

[0071] The hydraulic cylinder and the first mounting countersunk hole are provided with a detachable mounting structure, such as a bolt connection structure or a fixing pin structure. After the hydraulic cylinder has finished working, it can be removed from the first mounting countersunk hole, leaving only the tension holding component 400.

[0072] Setting the mounting structure between the hydraulic cylinder and the first mounting countersunk hole inside the first mounting countersunk hole allows the central support assembly 100 to be more compact and also avoids the risk of damage to the mounting structure due to exposure.

[0073] refer to Figure 1 and Figure 2 As shown, in some embodiments of this application, the tension retention assembly 400 includes a plurality of telescopic retaining rods. The fixed ends of the telescopic retaining rods are fixedly installed on the central support assembly 100. The telescopic ends of the telescopic retaining rods face the inner wall of the wind turbine main shaft 300 and can move radially and telescopically along the wind turbine main shaft 300. The plurality of telescopic retaining rods are arranged in a ring around the axial direction of the wind turbine main shaft 300, and the telescopic ends of the plurality of telescopic retaining rods constitute the tension retention part 401.

[0074] In this embodiment, the tension retention assembly 400 consists of multiple telescopic retaining rods. When the diameter of the expanded wind turbine main shaft 300 remains unchanged through the tension retention part 401, the fixed end of the telescopic retaining rod is installed on the central support assembly 100, and the telescopic end of the telescopic retaining rod extends towards the inner wall of the wind turbine main shaft 300 until it abuts against the inner wall of the wind turbine main shaft 300. After ensuring sufficient support force, the telescopic retaining rod is locked to keep its length unchanged, thereby keeping the diameter of the expanded wind turbine main shaft 300 unchanged. In a specific embodiment, the telescopic retaining rod uses a lead screw, and the support is completed by a simple mechanical mechanism.

[0075] Multiple telescopic retaining rods are arranged in a ring around the axial direction of the wind turbine main shaft 300, and the telescopic ends of the multiple telescopic retaining rods constitute the tension force retaining part 401, ensuring that the inner wall of the wind turbine main shaft 300 is subjected to uniform force in all directions.

[0076] refer to Figure 1 and Figure 2 As shown, in some embodiments of this application, the central support assembly 100 is provided with a second mounting countersunk hole, and the fixed end of the telescopic retaining rod is installed in the second mounting countersunk hole.

[0077] By providing second mounting countersunk holes in the central support assembly 100, the number of which corresponds to the number of telescopic retaining rods, allowing each telescopic retaining rod to be detachably installed within the second mounting countersunk hole. During the manufacturing process, the second mounting countersunk holes are pre-fabricated on the central support assembly 100, and these holes are evenly spaced. This ensures that the telescopic retaining rods can be quickly and accurately installed in their corresponding positions, guaranteeing that the installed hydraulic cylinders are evenly spaced.

[0078] The telescopic retaining rod and the second mounting countersunk hole are connected by a mounting structure, such as a bolt connection or a fixing pin. Thus, the telescopic retaining rod and the central support assembly 100 are separate units, which are assembled together only when in use, facilitating transportation.

[0079] Similarly, by placing the mounting structure between the telescopic retaining rod and the second mounting countersunk hole inside the second mounting countersunk hole, the center support assembly 100 can be made more compact, and the risk of damage to the mounting structure due to exposure can be avoided.

[0080] refer to Figure 1 and Figure 2 As shown, in some embodiments of this application, the number of telescopic retaining rods is consistent with the number of hydraulic cylinders, and the telescopic retaining rods and hydraulic cylinders are arranged alternately on the central support assembly 100.

[0081] In this embodiment, the number of telescopic retaining rods is consistent with the number of hydraulic cylinders, both being eight, corresponding to eight first mounting countersunk holes and eight second mounting countersunk holes. The number of telescopic retaining rods is consistent with the number of hydraulic cylinders, and the telescopic retaining rods and hydraulic cylinders are arranged alternately on the central support assembly 100. This ensures that when the hydraulic cylinders release their support force, the telescopic retaining rods provide support at positions adjacent to the hydraulic cylinders, guaranteeing that the inner wall of the wind turbine main shaft 300 is subjected to uniform force in all directions.

[0082] This application also discloses a method for adjusting the interference fit of the main shaft bearing of a wind turbine generator set, using the aforementioned wind turbine generator set main shaft bearing interference fit adjustment device. The adjustment method includes:

[0083] Adjust the tension force application component 200 so that the tension force application part 201 applies tension force to the inner wall of the wind turbine generator main shaft 300 until the interference fit of the wind turbine generator main shaft bearing reaches the preset value.

[0084] Adjust the tension holding assembly 400 to keep the shaft diameter of the wind turbine generator main shaft 300 unchanged after expansion through the tension holding part 401;

[0085] The tensioning force of the tensioning force application part 201 on the inner wall of the wind turbine main shaft 300 is cancelled.

[0086] In this embodiment, by using the wind turbine generator main shaft bearing interference adjustment device of this application to adjust the interference of the wind turbine generator main shaft bearing, the shaft diameter of the wind turbine generator main shaft 300 can be increased so that the interference of the wind turbine generator main shaft bearing reaches the preset value, thereby eliminating the problem of the main shaft bearing running.

[0087] Simultaneously, after the interference fit of the wind turbine main shaft bearing reaches the preset value, the tensioning force of the tensioning force application part 201 on the inner wall of the wind turbine main shaft 300 is released. The interference fit of the wind turbine main shaft bearing is maintained by the tensioning force holding assembly 400, and the tensioning force application part 201 is removed from the central support assembly 100. The tensioning force holding assembly 400 has a simpler structure than the tensioning force application assembly 200, effectively reducing costs, and only needs to withstand simple mechanical forces, resulting in higher stability. It also reduces the layout space required by the tensioning force application assembly 200.

[0088] Compared to current methods for adjusting the interference fit of wind turbine main shaft bearings, the method provided in this application eliminates the need to remove the wind turbine main shaft from the tower, resulting in better operability. The wind turbine main shaft bearing interference fit adjustment device consists of several small components, facilitating transfer and transportation.

[0089] During long-term operation, the tension retaining component 400 of the wind turbine main shaft bearing interference adjustment device will inevitably loosen or become damaged. This can lead to a weakening of the support force provided by the tension retaining component 400 to the inner wall of the wind turbine main shaft 300, or uneven application of the support force.

[0090] Therefore, in some embodiments of this application, the following are also included:

[0091] When it is determined that the tension holding component 400 has malfunctioned, the tension applying component 200 is readjusted so that the tension applying part 201 applies tension force to the inner wall of the wind turbine main shaft 300 until the interference fit of the wind turbine main shaft bearing reaches the preset value.

[0092] Replace the faulty tension holding assembly 400 and remove the tension force of the tension applying part 201 on the inner wall of the wind turbine main shaft 300.

[0093] When maintenance personnel discover a malfunction in the tension retention assembly 400, they can reapply tension force to the inner wall of the wind turbine main shaft 300 by adjusting the tension application part 201 of the tension application assembly 200. The tension application assembly 200 provides temporary support, while simultaneously facilitating the removal of the malfunctioning tension retention assembly 400. After removing the malfunctioning tension retention assembly 400, a new one can be installed, or the malfunctioning assembly can be reconfigured to meet operational requirements again, thus effectively supporting the inner wall of the wind turbine main shaft 300. The tension force of the tension application assembly 200 on the inner wall of the wind turbine main shaft 300 can then be removed. This method allows for quick repair of the malfunctioning tension retention assembly 400, simplifying maintenance.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A wind turbine generator main shaft bearing interference adjustment device, used for installation inside the main shaft of a wind turbine generator, characterized in that, include: Central support component (100); A tensioning force application assembly (200) is installed on the central support assembly (100). The tensioning force application assembly (200) is provided with a tensioning force application part (201), which is used to apply a tensioning force to the inner wall of the wind turbine main shaft (300) to increase the shaft diameter. An expansion force retaining assembly (400) is installed on the central support assembly (100). The expansion force retaining assembly (400) is provided with an expansion force retaining part (401), which is used to keep the shaft diameter of the wind turbine generator main shaft (300) unchanged after expansion. The tension retention assembly (400) includes a plurality of telescopic retaining rods. The fixed ends of the telescopic retaining rods are fixedly installed on the central support assembly (100). The telescopic ends of the telescopic retaining rods face the inner wall of the wind turbine main shaft (300) and can move radially along the wind turbine main shaft (300). The plurality of telescopic retaining rods are arranged in a ring around the axial direction of the wind turbine main shaft (300). The telescopic ends of the plurality of telescopic retaining rods constitute the tension retention part (401).

2. The interference fit adjustment device for the main shaft bearing of a wind turbine generator set according to claim 1, characterized in that: The tensioning force application assembly (200) includes a telescopic support member (210) and a telescopic control system (220). The telescopic support member (210) is fixedly installed on the central support assembly (100). The telescopic end of the telescopic support member (210) faces the inner wall of the wind turbine main shaft (300) and can move radially along the wind turbine main shaft (300). The telescopic support member (210) is provided with multiple telescopic ends. The telescopic ends of the telescopic support member (210) are arranged in a ring around the axial direction of the wind turbine main shaft (300) to form the tensioning force application part (201). The telescopic control system (220) is connected to the telescopic support member (210) to control the telescopic movement of the telescopic ends of the telescopic support member (210).

3. The interference fit adjustment device for the main shaft bearing of a wind turbine generator set according to claim 2, characterized in that: The telescopic support (210) includes multiple hydraulic cylinders, which are mounted on the central support assembly (100). The multiple hydraulic cylinders are arranged in a ring around the axial direction of the wind turbine main shaft (300). The telescopic control system (220) includes a hydraulic control device (221) and a hydraulic circuit (222). The hydraulic control device (221) is connected to the hydraulic cylinders through the hydraulic circuit (222).

4. The interference fit adjustment device for the main shaft bearing of a wind turbine generator set according to claim 3, characterized in that: The hydraulic cylinders are arranged in parallel.

5. The interference fit adjustment device for the main shaft bearing of a wind turbine generator set according to claim 3, characterized in that: The central support assembly (100) is provided with a first mounting countersunk hole, and the hydraulic cylinder is detachably installed in the first mounting countersunk hole.

6. The interference fit adjustment device for the main shaft bearing of a wind turbine generator set according to claim 1, characterized in that: The central support assembly (100) is provided with a second mounting countersunk hole, and the fixed end of the telescopic retaining rod is installed in the second mounting countersunk hole.

7. The interference fit adjustment device for the main shaft bearing of a wind turbine generator set according to claim 1, characterized in that: The number of telescopic retaining rods is consistent with the number of hydraulic cylinders, and the telescopic retaining rods and the hydraulic cylinders are arranged alternately on the central support assembly (100).

8. A method for adjusting the interference fit of the main shaft bearing of a wind turbine generator set, characterized in that, The wind turbine generator main shaft bearing interference adjustment device as described in any one of claims 1-7 is used, wherein the adjustment method includes: Adjust the tension force application component (200) so that the tension force application part (201) applies tension force to the inner wall of the wind turbine generator main shaft (300) until the interference fit of the wind turbine generator main shaft bearing reaches the preset value; Adjust the tension holding assembly (400) to keep the shaft diameter of the wind turbine generator main shaft (300) unchanged after expansion by means of the tension holding part (401); The tensioning force of the tensioning force application part (201) on the inner wall of the wind turbine main shaft (300) is canceled.

9. The method for adjusting the interference fit of the main shaft bearing of a wind turbine generator set according to claim 8, characterized in that, Also includes: When it is determined that the tension holding component (400) has malfunctioned, the tension applying component (200) is readjusted so that the tension applying part (201) applies tension force to the inner wall of the wind turbine main shaft (300) until the interference fit of the wind turbine main shaft bearing reaches the preset value. Replace the faulty tension holding assembly (400) and cancel the tension force of the tension applying part (201) on the inner wall of the wind turbine main shaft (300).

Images