Device and method for adjusting magnitude of interference of main shaft bearing of wind generating set

Abstract

The invention provides a wind generating set main shaft bearing interference magnitude adjusting device and method. The wind generating set main shaft bearing interference magnitude adjusting device is used for being installed in a wind generating set main shaft and comprises a center supporting assembly; the expansion force applying assembly is installed on the center supporting assembly, the expansion force applying assembly is provided with an expansion force applying part, and the expansion force applying part is used for applying expansion force for increasing the shaft diameter to the inner wall of the main shaft of the wind generating set; and the expansion force maintaining assembly is installed on the center supporting assembly, the expansion force maintaining assembly is provided with an expansion force maintaining part, and the expansion force maintaining part is used for keeping the shaft diameter of the main shaft of the expanded wind generating set unchanged. The problem of ring running of the main shaft bearing can be solved, and better execution performance is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind turbine installation equipment, in particular to a wind turbine main shaft bearing interference amount adjusting device and method. BACKGROUND

[0002] The wind turbine main shaft is a core component for transmitting torque in the wind turbine, adopts a hollow structure design, is mainly connected with the wind turbine fin and the wind turbine base, and bears mechanical energy transmission and load support functions.

[0003] After the wind turbine main shaft bearing is installed, due to insufficient interference amount between the main bearing inner ring and the main shaft, insufficient rigidity of the main shaft and other influences, the main shaft bearing has a “running circle” phenomenon, that is, the relative rotation movement between the bearing inner ring and the wind turbine main shaft. It will cause the main shaft to wear, the gap to increase, and further cause more serious consequences.

[0004] When the running circle occurs, there are currently three ways to handle it: 1. Replace the main shaft under the tower. 2. Increase the stop pin between the main shaft and the bearing inner ring. 3. Increase the expansion sleeve between the main shaft and the bearing. These three solutions all face the problems of high cost, complex and difficult execution. SUMMARY

[0005] Based on this, the present application provides a wind turbine main shaft bearing interference amount adjusting device and method, which can solve the problem of wind turbine main shaft bearing running circle on the wind turbine main shaft.

[0006] The present application provides a wind turbine main shaft bearing interference amount adjusting device, which is installed in the wind turbine main shaft, comprising:

[0007] A center support assembly;

[0008] A tensioning force applying assembly is installed in the center support assembly, and the tensioning force applying assembly is provided with a tensioning force applying part for applying a tensioning force for increasing the shaft diameter to the inner wall of the wind turbine main shaft;

[0009] A tensioning force maintaining assembly is installed in the center support assembly, and the tensioning force maintaining assembly is provided with a tensioning force maintaining part for maintaining the expanded wind turbine main shaft diameter unchanged.

[0010] According to the wind turbine main shaft bearing interference amount adjusting device provided by the embodiment of the present application, at least the following beneficial effects are achieved: the interference amount of the wind turbine main shaft bearing can be adjusted by adjusting the expansion force applying assembly, so that the expansion force applying part of the expansion force applying assembly applies an expansion force to the inner wall of the wind turbine main shaft to increase the shaft diameter, and as the expansion force increases, the shaft diameter of the wind turbine main shaft is continuously increased until the interference amount of the wind turbine main shaft bearing reaches the preset value, so that the interference amount of the wind turbine main shaft bearing meets the engineering requirements, thereby eliminating the problem of the main shaft bearing running out of the raceway. After the interference amount of the wind turbine main shaft bearing reaches the preset value, the expansion force applied by the expansion force applying part to the inner wall of the wind turbine main shaft is cancelled, and the interference amount of the wind turbine main shaft bearing is maintained by the expansion force maintaining assembly. The expansion force maintaining assembly has a simpler and more reliable structure than the expansion force applying assembly, effectively reduces the cost, and improves the stability of work.

[0011] According to some embodiments of the present application, the expansion force applying assembly comprises a telescopic support and a telescopic control system, the telescopic support is fixedly installed on the central support assembly, the telescopic end of the telescopic support faces the inner wall of the wind turbine main shaft and can move in the radial direction of the wind turbine main shaft, the telescopic support is provided with a plurality of telescopic ends, the telescopic ends of the telescopic support are arranged in a ring shape around the axial direction of the wind turbine main shaft to form the expansion force applying part, and the telescopic control system is in control connection with the telescopic support to control the telescopic movement of the telescopic ends of the telescopic support.

[0012] In the embodiment, when the expansion force applying part applies the expansion force to increase the shaft diameter to the inner wall of the wind turbine main shaft, under the control of the telescopic control system, the telescopic ends of the telescopic support extend towards the inner wall of the wind turbine main shaft and abut against the inner wall of the wind turbine main shaft, the expansion force can be continuously increased by controlling the extension length of the telescopic ends of the telescopic support, the shaft diameter of the wind turbine main shaft is expanded under the action of the expansion force, until the interference amount of the wind turbine main shaft bearing reaches the preset value, so that the interference amount of the wind turbine main shaft bearing meets the engineering requirements, thereby eliminating the problem of the main shaft bearing running out of the raceway.

[0013] According to some embodiments of the present application, the telescopic support comprises a plurality of hydraulic cylinders, the hydraulic cylinders are installed on the central support assembly, and the plurality of hydraulic cylinders are arranged in a ring shape around the axial direction of the wind turbine main shaft. The telescopic control system comprises a hydraulic control device and a hydraulic oil circuit, and the hydraulic control device is connected with the hydraulic cylinders through the hydraulic oil circuit.

[0014] In the embodiment, the telescopic support is composed of a plurality of hydraulic cylinders, the bases of the hydraulic cylinders are mounted on the central support assembly, the plurality of hydraulic cylinders are arranged in a ring shape with the axial direction of the main shaft of the wind turbine generator set as the center, the piston rods of the hydraulic cylinders are directed towards the inner wall of the main shaft of the wind turbine generator set, the hydraulic control device controls the oil supply to the hydraulic cylinders through the hydraulic oil circuit to control the extension and contraction of the pistons and further control the expansion force. The expansion force and the interference amount can be accurately controlled by controlling the oil supply.

[0015] According to some embodiments of the present application, the plurality of hydraulic cylinders are arranged in parallel.

[0016] In the embodiment, since the models of the hydraulic cylinders are the same and the loads between the hydraulic cylinders are the same, the parallel arrangement of the hydraulic cylinders can make the piston rods of all the hydraulic cylinders uniformly support the inner wall of the main shaft of the wind turbine generator set, so that the inner wall of the main shaft of the wind turbine generator set is subjected to uniform forces in all directions.

[0017] According to some embodiments of the present application, the central support assembly is provided with a first mounting counterbore, and the hydraulic cylinders are detachably mounted in the first mounting counterbore.

[0018] In the embodiment, when the hydraulic cylinders are mounted, the hydraulic cylinders can be quickly and accurately mounted in the corresponding positions, and the uniformly spaced arrangement between the mounted hydraulic cylinders is ensured. The mounting structure between the hydraulic cylinders and the first mounting counterbore is arranged in the first mounting counterbore, which can make the central support assembly more compact and can also avoid the risk of damage to the mounting structure due to exposure.

[0019] According to some embodiments of the present application, the expansion force maintaining assembly includes a plurality of telescopic maintaining rods, the fixed ends of the telescopic maintaining rods are fixedly mounted on the central support assembly, the telescopic ends of the telescopic maintaining rods are directed towards the inner wall of the main shaft of the wind turbine generator set and can move in the radial direction of the main shaft of the wind turbine generator set, the plurality of telescopic maintaining rods are arranged in a ring shape with the axial direction of the main shaft of the wind turbine generator set as the center, and the telescopic ends of the plurality of telescopic maintaining rods constitute an expansion force maintaining portion.

[0020] In the embodiment, the expansion force maintaining assembly is composed of a plurality of telescopic maintaining rods. When the diameter of the expanded main shaft of the wind turbine generator set is maintained unchanged by the expansion force maintaining portion, the fixed ends of the telescopic maintaining rods are mounted on the central support assembly, the telescopic ends of the telescopic maintaining rods are directed towards the inner wall of the main shaft of the wind turbine generator set and are extended until they abut against the inner wall of the main shaft of the wind turbine generator set, and then the telescopic maintaining rods are locked to maintain their lengths unchanged, so that the diameter of the expanded main shaft of the wind turbine generator set is maintained unchanged. The uniform forces in all directions on the inner wall of the main shaft of the wind turbine generator set are also ensured.

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

[0022] In the present embodiment, the mounting structure between the telescopic retaining rod and the second mounting counterbore is arranged in the second mounting counterbore, which can make the central support assembly more compact and avoid the risk of damage to the mounting structure due to exposure.

[0023] According to some embodiments of the present application, 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 in an interleaved manner on the central support assembly.

[0024] In the present embodiment, the telescopic retaining rod can provide support at the adjacent position of the hydraulic cylinder when the hydraulic cylinder removes the supporting force, thereby ensuring that the inner wall of the main shaft of the wind turbine generator set is subjected to uniform force in all directions.

[0025] The present application also discloses a method for adjusting the interference amount of the main shaft bearing of a wind turbine generator set, which uses the above-mentioned device for adjusting the interference amount of the main shaft bearing of a wind turbine generator set, and the adjusting method comprises the following steps:

[0026] Adjusting the expansion force applying assembly to apply the expansion force to the inner wall of the main shaft of the wind turbine generator set by the expansion force applying part until the interference amount of the main shaft bearing of the wind turbine generator set reaches a preset value.

[0027] Adjusting the expansion force retaining assembly to keep the expanded diameter of the main shaft of the wind turbine generator set unchanged by the expansion force retaining part.

[0028] Canceling the expansion force applied to the inner wall of the main shaft of the wind turbine generator set by the expansion force applying part.

[0029] According to the method for adjusting the interference amount of the main shaft bearing of a wind turbine generator set provided by the present application, the main shaft of the wind turbine generator set does not need to be lowered, which has better execution and is composed of multiple small parts, thereby facilitating transfer and transportation.

[0030] According to some embodiments of the present application, the method further comprises the following steps:

[0031] When it is judged that the expansion force retaining assembly is faulty, readjusting the expansion force applying assembly to apply the expansion force to the inner wall of the main shaft of the wind turbine generator set by the expansion force applying part until the interference amount of the main shaft bearing of the wind turbine generator set reaches a preset value.

[0032] Replacing the faulty expansion force retaining assembly and canceling the expansion force applied to the inner wall of the main shaft of the wind turbine generator set by the expansion force applying part.

[0033] In the embodiment, the repair of the malfunctioning expansion force maintaining assembly can be quickly completed, and the operation and maintenance are simple and convenient.

[0034] In addition to the technical problems solved by the embodiments of the application described above, the technical features constituting the technical solutions, and the beneficial effects brought by these technical features, other technical problems solved by the wind turbine main shaft bearing interference amount adjusting device and method provided by the application, other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0036] Figure 1 The structural schematic diagram of the wind turbine main shaft bearing interference amount adjusting device provided by the embodiments of the application is shown in the figure.

[0037] Figure 2 For Figure 1 The cross-sectional view in the A-A direction.

[0038] Explanation of reference signs:

[0039] 100 - center support assembly

[0040] 200 - expansion force applying assembly; 201 - expansion force applying part; 210 - telescopic support; 221 - hydraulic control device; 222 - hydraulic oil path; 220 - telescopic control system

[0041] 300 - wind turbine main shaft

[0042] 400 - expansion force maintaining assembly; 401 - expansion force maintaining part DETAILED DESCRIPTION

[0043] In order to make the objects, technical solutions and advantages of the present application clearer, the following will be combined with the drawings of the preferred embodiments of the present application to describe the technical solutions in the embodiments of the present application in more detail. In the drawings, the same or similar notations represent the same or similar components or components with the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, rather than all the embodiments. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work under the premise of the present application, belong to the scope of protection of the present application. The embodiments of the present application will be described in detail below with reference to the drawings.

[0044] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixed connection, or indirect connection through an intermediate medium, or internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

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

[0046] The terms "first", "second", "third" (if any) in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0047] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or display including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or displays.

[0048] At present, with the development of large-scale wind turbine, the main bearing technology route is all changed to double TRB bearing. After the wind power main shaft bearing is installed, due to the insufficient interference amount of the inner ring of the main bearing and the insufficient rigidity of the main shaft, the main shaft bearing has the phenomenon of "running circle", that is, the relative rotation motion between the bearing inner ring and the main shaft of the wind turbine. It will cause the main shaft wear, the gap increase, and further cause more serious consequences.

[0049] Therefore, referring to the drawings shown in Figure 1 and Figure 2 , the application discloses a wind turbine main shaft bearing interference amount adjusting device for being installed in the wind turbine main shaft, comprising:

[0050] a center support assembly 100;

[0051] an expansion force applying assembly 200, the expansion force applying assembly 200 is installed in the center support assembly 100, the expansion force applying assembly 200 is provided with an expansion force applying part 201, the expansion force applying part 201 is used for applying the expansion force of increasing the shaft diameter to the inner wall of the wind turbine main shaft 300;

[0052] an expansion force maintaining assembly 400, the expansion force maintaining assembly 400 is installed in the center support assembly 100, the expansion force maintaining assembly 400 is provided with an expansion force maintaining part 401, the expansion force maintaining part 401 is used for keeping the shaft diameter of the expanded wind turbine main shaft 300 unchanged.

[0053] Among them, the center support assembly 100 is used for providing installation support for other accessories, which can be block-shaped, spherical and the like. The center support assembly 100 can be provided with mounting holes, mounting bolts, fixed pins and the like, which are not limited herein. The expansion force applying assembly 200 and the expansion force maintaining assembly 400 are installed and fixed on the center support assembly 100 through the mounting structure and the like.

[0054] When the wind power main shaft bearing has the phenomenon of "running circle" due to the insufficient interference amount after being installed or for a long time of operation, the wind turbine main shaft bearing interference amount adjusting device is installed in the wind turbine main shaft and at the position corresponding to the main bearing.

[0055] By adjusting the expansion force applying assembly 200, the expansion force applying part 201 of the expansion force applying assembly 200 applies the expansion force of increasing the shaft diameter to the inner wall of the wind turbine main shaft 300. With the increase of the expansion force, the shaft diameter of the wind turbine main shaft 300 is continuously increased until the interference amount of the wind turbine main shaft bearing reaches the preset value, so that the interference amount of the wind turbine main shaft bearing meets the engineering requirements, thereby eliminating the problem of the main bearing running circle. The size of the preset expansion force can be obtained through simulation.

[0056] After the interference of the main shaft bearing of the wind turbine reaches the preset value, the adjusting and expanding force maintaining assembly 400 keeps the shaft diameter of the expanded main shaft 300 of the wind turbine unchanged through the expanding force maintaining part 401, so as to maintain the interference of the main shaft bearing of the wind turbine and ensure the stable operation of the wind turbine. Then, the expanding force exerting part 201 cancels the expanding force on the inner wall of the main shaft 300 of the wind turbine, and the interference of the main shaft bearing of the wind turbine is maintained by the expanding force maintaining assembly 400.

[0057] It should be noted that the expanding force exerting assembly 200 needs to exert the expanding force increasing the shaft diameter on the inner wall of the main shaft 300 of the wind turbine, and the expanding force is an action force changing from small to large. Therefore, the expanding force exerting assembly 200 is generally selected as a hydraulic device or a motor device with a telescopic support mechanism. Such devices have the characteristics of complex structure and high cost. If the interference of the main shaft bearing of the wind turbine meets the engineering requirements, the expanding force exerting assembly 200 needs to continuously maintain the working state. This mode will cause high operation cost and poor stability of the system. Moreover, due to the complex structure of the expanding force exerting assembly 200, a large layout space and a complex fixing mechanism are needed to ensure the stability of the expanding force exerting assembly 200 during the operation of the wind turbine.

[0058] We take the hydraulic cylinder as an example to illustrate the expanding force exerting assembly 200. In order to ensure that the inner wall of the main shaft 300 of the wind turbine is subjected to uniform expanding force, a plurality of hydraulic cylinders are arranged in a ring. In the operation of the hydraulic cylinder, a hydraulic system including a hydraulic pump, a hydraulic valve, a hydraulic pipeline and the like is also needed. If the interference of the main shaft bearing of the wind turbine meets the engineering requirements, the hydraulic cylinder needs to continuously maintain the working state, and the hydraulic oil in the oil circuit needs to maintain high pressure, so the hydraulic valve, the hydraulic pipeline and the like need to be continuously operated. The whole system is relatively complex, the operation cost is high, and faults are prone to occur.

[0059] However, in the present application, after the interference of the main shaft bearing of the wind turbine reaches the preset value, the expanding force exerting part 201 cancels the expanding force on the inner wall of the main shaft 300 of the wind turbine, and the interference of the main shaft bearing of the wind turbine is maintained by the expanding force maintaining assembly 400. The expanding force exerting assembly 200 can be in a non-working state, or even after working, the expanding force exerting assembly 200 can be taken off from the central support assembly 100. The expanding force maintaining assembly 400 only needs to provide a stable supporting force, which can be commonly provided by various rod members having supporting function, such as supporting rods, screw rod structural members and the like. The expanding force maintaining assembly 400 has a simpler structure than the expanding force exerting assembly 200, effectively reduces the cost, only needs to bear simple mechanical force, and has higher stability.

[0060] Referring to Figure 1 and Figure 2 As shown in FIGS. 1 and 2, in some embodiments of the present application, the tensioning force applying assembly 200 comprises a telescopic support 210 and a telescopic control system 220, the telescopic support 210 is fixedly installed on the central support assembly 100, the telescopic end of the telescopic support 210 faces the inner wall of the wind turbine main shaft 300 and can move in the radial direction of the wind turbine main shaft 300, the telescopic support 210 is provided with a plurality of telescopic ends, the telescopic ends of the telescopic support 210 are arranged in a ring shape with the axial direction of the wind turbine main shaft 300 as the center to form a tensioning force applying part 201, and the telescopic control system 220 is in control connection with the telescopic support 210 to control the telescopic movement of the telescopic end of the telescopic support 210.

[0061] In this embodiment, when the tensioning force applying part 201 applies the tensioning force for expanding 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 towards the inner wall of the wind turbine main shaft 300 and abuts to the inner wall of the wind turbine main shaft 300, and the tensioning force can be continuously increased by controlling the extension length of the telescopic end of the telescopic support 210, the shaft diameter of the wind turbine main shaft 300 is expanded under the action of the tensioning force, until the interference amount of the wind turbine main shaft bearing reaches the preset value, so that the interference amount of the wind turbine main shaft bearing meets the engineering requirements, thereby eliminating the problem of the main shaft bearing running out of circle.

[0062] It should be noted that the wind turbine main shaft 300 and the wind turbine main shaft bearing are both circular structures, and the wind turbine main shaft 300 after the shaft diameter expansion needs to maintain a uniform circular cross section, so as to maintain the uniformity of the acting force between the wind turbine main shaft 300 and the wind turbine main shaft bearing. Therefore, the telescopic support 210 is provided with a plurality of telescopic ends, and the telescopic ends of the telescopic support 210 are arranged in a ring shape with the axial direction of the wind turbine main shaft 300 as the center to form the tensioning force applying part 201, so that the inner wall of the wind turbine main shaft 300 is subjected to uniform acting force in all directions, and the wind turbine main shaft 300 after the shaft diameter expansion maintains a uniform circular shape.

[0063] Referring to Figure 1 and Figure 2 As shown in FIGS. 1 and 2, in some embodiments of the present application, the telescopic support 210 comprises a plurality of hydraulic cylinders, the hydraulic cylinders are installed on the central support assembly 100, and the plurality of hydraulic cylinders are arranged in a ring shape with the axial direction of the wind turbine main shaft 300 as the center, the telescopic control system 220 comprises a hydraulic control device 221 and a hydraulic oil circuit 222, and the hydraulic control device 221 is connected with the hydraulic cylinders through the hydraulic oil circuit 222.

[0064] In the embodiment, the telescopic support 210 is composed of a plurality of hydraulic cylinders, the bases of the hydraulic cylinders are mounted on the central support assembly 100, the plurality of hydraulic cylinders are arranged in a ring shape with the axial direction of the main shaft 300 of the wind turbine generator set as the center, the piston rods of the hydraulic cylinders are directed to the inner wall of the main shaft 300 of the wind turbine generator set, the hydraulic control device 221 mainly includes a hydraulic pump, a hydraulic oil tank, a control valve and the like, the hydraulic control device 221 controls the oil supply to the hydraulic cylinders through the hydraulic oil circuit 222 to control the extension and retraction of the pistons and further control the expansion force. The expansion force is controlled by using the hydraulic system, and the expansion force and the interference amount can be accurately controlled by controlling the oil supply.

[0065] In some embodiments of the present application, the plurality of hydraulic cylinders are arranged in parallel.

[0066] In the embodiment, the plurality of hydraulic cylinders are arranged in parallel, that is, the rodless chambers or the rod chambers of all the hydraulic cylinders are respectively connected to the same pressure oil source and oil return circuit, and all the parallel branches share the system pressure. In the embodiment, since the models of the hydraulic cylinders are the same and the loads between the hydraulic cylinders are the same, the parallel arrangement of the hydraulic cylinders can make the piston rods of all the hydraulic cylinders uniformly support the inner wall of the main shaft 300 of the wind turbine generator set, so that the inner wall of the main shaft 300 of the wind turbine generator set is subjected to uniform forces in all directions.

[0067] In some embodiments, each hydraulic cylinder can also be connected to an independent hydraulic system, and each hydraulic system independently supplies oil to the corresponding hydraulic cylinder, which can also achieve the purpose of controlling the expansion force. In order to ensure that the piston rods of each hydraulic cylinder can be extended and retracted synchronously, a synchronous starting system is arranged to control the synchronous operation of each hydraulic system.

[0068] In some embodiments of the present application, the central support assembly 100 is provided with a first mounting counterbore, and the hydraulic cylinders are detachably mounted in the first mounting counterbores.

[0069] In the embodiment, the first mounting counterbores are arranged on the central support assembly 100, and the number of the first mounting counterbores corresponds to the number of the hydraulic cylinders, so that each hydraulic cylinder can be detachably mounted in the corresponding first mounting counterbore.

[0070] During the production process of the central support assembly 100, the first mounting counterbores are prefabricated on the central support assembly 100, and the first mounting counterbores are uniformly arranged on the central support assembly 100. In this way, when the hydraulic cylinders are installed, the hydraulic cylinders can be quickly and accurately installed at the corresponding positions, so as to ensure that the installed hydraulic cylinders are uniformly arranged.

[0071] The mounting structure between the hydraulic cylinder and the first mounting counterbore is arranged in the first mounting counterbore, so that the center support assembly 100 is more compact, and the risk of damage of the mounting structure due to exposure can be avoided.

[0072] The mounting structure between the hydraulic cylinder and the first mounting counterbore is arranged in the first mounting counterbore, so that the center support assembly 100 is more compact, and the risk of damage of the mounting structure due to exposure can be avoided.

[0073] Reference Figure 1 and Figure 2 As shown in FIGS. 1 and 2, in some embodiments of the present application, the expansion force maintaining assembly 400 includes a plurality of telescopic retaining rods, the fixed ends of the telescopic retaining rods are fixedly installed on the center support assembly 100, the telescopic ends of the telescopic retaining rods are directed towards the inner wall of the wind turbine generator main shaft 300 and can telescopically move along the radial direction of the wind turbine generator main shaft 300, the plurality of telescopic retaining rods are arranged in a ring shape with the axial direction of the wind turbine generator main shaft 300 as the center, and the telescopic ends of the plurality of telescopic retaining rods constitute the expansion force maintaining portion 401.

[0074] In the present embodiment, the expansion force maintaining assembly 400 is composed of a plurality of telescopic retaining rods. When the axial diameter of the expanded wind turbine generator main shaft 300 is maintained unchanged by the expansion force maintaining portion 401, the fixed ends of the telescopic retaining rods are installed on the center support assembly 100, the telescopic ends of the telescopic retaining rods are directed towards the inner wall of the wind turbine generator main shaft 300 and are extended until abutting against the inner wall of the wind turbine generator main shaft 300, and after ensuring that the telescopic retaining rods have sufficient supporting force, the telescopic retaining rods are locked to maintain the length unchanged, so that the axial diameter of the expanded wind turbine generator main shaft 300 is maintained unchanged. In specific embodiments, the telescopic retaining rods are screw rods, and the support is completed by a simple mechanical mechanism.

[0075] The plurality of telescopic retaining rods are arranged in a ring shape with the axial direction of the wind turbine generator main shaft 300 as the center, the telescopic ends of the plurality of telescopic retaining rods constitute the expansion force maintaining portion 401, and the inner wall of the wind turbine generator main shaft 300 is uniformly subjected to force in each direction.

[0076] Reference Figure 1 and Figure 2 As shown in FIGS. 1 and 2, in some embodiments of the present application, the center support assembly 100 is provided with a second mounting counterbore, and the fixed ends of the telescopic retaining rods are installed in the second mounting counterbore.

[0077] By providing second mounting countersunk holes in the center support assembly 100, with the number of these holes corresponding to the number of telescopic retaining rods, each telescopic retaining rod can be removably mounted within a second mounting countersunk hole. During the production process of the center support assembly 100, the second mounting countersunk holes are prefabricated and evenly spaced throughout the center support assembly 100. This allows the telescopic retaining rods to be quickly and accurately positioned, ensuring even spacing between the hydraulic cylinders after installation.

[0078] A mounting structure is provided between the telescopic retaining rod and the second mounting countersunk hole, such as a bolt connection structure, a fixed pin structure, etc. Thus, the telescopic retaining rod and the central support assembly 100 are separated and assembled together only when in use, facilitating transportation.

[0079] Likewise, disposing the mounting structure between the telescopic retaining rod and the second mounting countersunk hole in the second mounting countersunk hole can make the central support assembly 100 more compact and avoid the risk of damage to the mounting structure due to exposure.

[0080] refer to Figure 1 and Figure 2 As shown, in some embodiments of the present application, 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 in a staggered manner 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 the eight first mounting countersunk holes and eight second mounting countersunk holes. The number of telescopic retaining rods matches the number of hydraulic cylinders, and the telescopic retaining rods and hydraulic cylinders are arranged in a staggered arrangement on the central support assembly 100. This allows the telescopic retaining rods to provide support at adjacent locations when the hydraulic cylinders are released, ensuring uniform force on the inner wall of the wind turbine main shaft 300 in all directions.

[0082] The present application also discloses a method for adjusting the interference of a main shaft bearing of a wind turbine generator set, which uses the above-mentioned device for adjusting the interference of a main shaft bearing of a wind turbine generator set. The adjustment method includes:

[0083] Adjust the expansion force applying assembly 200 so that the expansion force applying portion 201 applies an expansion force to the inner wall of the wind turbine main shaft 300 until the interference fit of the wind turbine main shaft bearing reaches a preset value;

[0084] Adjust the expansion force maintaining assembly 400 so that the diameter of the main shaft 300 of the wind turbine generator set remains unchanged after expansion through the expansion force maintaining portion 401;

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

[0086] In the embodiment, the interference amount of the main shaft bearing of the wind turbine generator is adjusted by using the interference amount adjusting device of the main shaft bearing of the wind turbine generator, so that the shaft diameter of the main shaft 300 of the wind turbine generator is increased, the interference amount of the main shaft bearing of the wind turbine generator reaches the preset value, and the problem of the main shaft bearing running out of the race is eliminated.

[0087] Meanwhile, after the interference amount of the main shaft bearing of the wind turbine generator reaches the preset value, the expansion force of the expansion force applying part 201 on the inner wall of the main shaft 300 of the wind turbine generator is cancelled, the interference amount of the main shaft bearing of the wind turbine generator is maintained by the expansion force maintaining assembly 400, and the expansion force applying part 201 is removed from the central support assembly 100. The expansion force maintaining assembly 400 has a simpler structure than the expansion force applying assembly 200, effectively reduces the cost, only needs to bear simple mechanical force, has higher stability, and can reduce the layout space required by the expansion force applying assembly 200.

[0088] Compared with the current adjustment method of the interference amount of the main shaft bearing of the wind turbine generator, the method provided by the application has better execution without the need to lower the tower of the wind turbine generator. The interference amount adjusting device of the main shaft bearing of the wind turbine generator is composed of multiple small parts, and is convenient to transfer and transport.

[0089] During a long period of operation of the interference amount adjusting device of the main shaft bearing of the wind turbine generator, the expansion force maintaining assembly 400 will inevitably have faults such as loosening or damage. As a result, the supporting force provided by the expansion force maintaining assembly 400 on the inner wall of the main shaft 300 of the wind turbine generator will be weakened or the supporting force applied will be uneven.

[0090] Therefore, in some embodiments of the application, the following steps are further included.

[0091] When it is judged that the expansion force maintaining assembly 400 has a fault, the expansion force applying assembly 200 is adjusted again, so that the expansion force applying part 201 applies the expansion force on the inner wall of the main shaft 300 of the wind turbine generator, until the interference amount of the main shaft bearing of the wind turbine generator reaches the preset value.

[0092] The expansion force maintaining assembly 400 having the fault is replaced, and the expansion force of the expansion force applying part 201 on the inner wall of the main shaft 300 of the wind turbine generator is cancelled.

[0093] When the maintenance personnel find that the expansion force maintaining assembly 400 is out of order, the expansion force exerting part 201 of the expansion force adjusting assembly 200 is used to exert the expansion force on the inner wall of the wind turbine main shaft 300 again, the expansion force exerting assembly 200 is used to replace the short-time support, and the out-of-order expansion force maintaining assembly 400 is removed conveniently. After the out-of-order expansion force maintaining assembly 400 is removed and a new expansion force maintaining assembly 400 is installed or the out-of-order expansion force maintaining assembly 400 is adjusted to meet the use requirements again, the effective support on the inner wall of the wind turbine main shaft 300 is achieved. Then, the expansion force exerting assembly 200 is removed from the inner wall of the wind turbine main shaft 300. Through the above method, the repair work of the out-of-order expansion force maintaining assembly 400 can be completed quickly, and the maintenance is simple and convenient.

[0094] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A wind turbine generator main shaft bearing interference adjustment device, used for installation in the wind turbine main shaft, characterized in that: include: a center support assembly (100); An expansion force applying assembly (200), the expansion force applying assembly (200) being mounted on the central support assembly (100), the expansion force applying assembly (200) being provided with an expansion force applying portion (201), the expansion force applying portion (201) being used to apply an expansion force to the inner wall of the main shaft (300) of the wind turbine generator set to increase the shaft diameter; An expansion force retaining assembly (400) is installed on the central support assembly (100), and the expansion force retaining assembly (400) is provided with an expansion force retaining portion (401). The expansion force retaining portion (401) is used to keep the shaft diameter of the main shaft (300) of the wind turbine generator set unchanged after expansion.

2. The wind turbine generator main shaft bearing interference adjustment device according to claim 1, characterized in that: The expansion force applying assembly (200) comprises a telescopic support member (210) and a telescopic control system (220). The telescopic support member (210) is fixedly mounted on the central support assembly (100). The telescopic end of the telescopic support member (210) faces the inner wall of the main shaft (300) of the wind turbine generator set and is capable of telescopic movement along the radial direction of the main shaft (300) of the wind turbine generator set. The telescopic support member (210) is provided with a plurality of telescopic ends. The telescopic ends of the telescopic support member (210) are arranged in a ring shape with the axial direction of the main shaft (300) of the wind turbine generator set as the center to form the expansion force applying portion (201). The telescopic control system (220) is control-connected to the telescopic support member (210) to control the telescopic movement of the telescopic end of the telescopic support member (210).

3. The wind turbine generator main shaft bearing interference adjustment device according to claim 2, characterized in that: The telescopic support member (210) comprises a plurality of hydraulic cylinders, the hydraulic cylinders being mounted on the central support assembly (100), the plurality of hydraulic cylinders being arranged in a ring with the axial direction of the main shaft (300) of the wind turbine generator set as the center, the telescopic control system (220) comprising a hydraulic control device (221) and a hydraulic oil circuit (222), the hydraulic control device (221) being connected to the hydraulic cylinders via the hydraulic oil circuit (222).

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

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

6. The wind turbine generator main shaft bearing interference adjustment device according to claim 1, characterized in that: The expansion force retaining assembly (400) includes a plurality of telescopic retaining rods, wherein the fixed ends of the telescopic retaining rods are fixedly mounted on the central support assembly (100), the telescopic ends of the telescopic retaining rods face the inner wall of the main shaft (300) of the wind turbine generator set, and are capable of telescopic movement along the radial direction of the main shaft (300) of the wind turbine generator set, and the plurality of telescopic retaining rods are arranged in a ring shape with the axial direction of the main shaft (300) of the wind turbine generator set as the center, and the telescopic ends of the plurality of telescopic retaining rods constitute the expansion force retaining portion (401).

7. The wind turbine generator main shaft bearing interference adjustment device according to claim 6, 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 mounted in the second mounting countersunk hole.

8. The wind turbine generator main shaft bearing interference adjustment device according to claim 6, characterized in that: The number of the telescopic retaining rods is consistent with the number of the hydraulic cylinders, and the telescopic retaining rods and the hydraulic cylinders are arranged in a staggered manner on the central support assembly (100).

9. A method for adjusting the interference of a main shaft bearing of a wind turbine generator set, characterized in that: The wind turbine generator set main shaft bearing interference adjustment device according to any one of claims 1 to 8 is used, and the adjustment method includes: Adjusting the expansion force applying assembly (200) so that the expansion force applying portion (201) applies an expansion force to the inner wall of the wind turbine generator set main shaft (300) until the interference fit of the wind turbine generator set main shaft bearing reaches a preset value; Adjusting the expansion force retaining assembly (400) to maintain the shaft diameter of the expanded wind turbine generator set main shaft (300) unchanged through the expansion force retaining portion (401); The expansion force exerted by the expansion force applying portion (201) on the inner wall of the main shaft (300) of the wind turbine generator set is cancelled.

10. The method for adjusting the interference of the main shaft bearing of a wind turbine generator set according to claim 9, characterized in that: Also includes: When it is determined that the expansion force retaining assembly (400) has failed, the expansion force applying assembly (200) is readjusted so that the expansion force applying portion (201) applies an expansion force to the inner wall of the main shaft (300) of the wind turbine generator set until the interference fit of the main shaft bearing of the wind turbine generator set reaches a preset value; The failed expansion force retaining assembly (400) is replaced, and the expansion force exerted by the expansion force applying portion (201) on the inner wall of the main shaft (300) of the wind turbine generator set is canceled.

Images