Bearing mounting tool

Abstract

The utility model provides a bearing mounting tool. The shaft system comprises an inner shaft, an outer shaft arranged on the outer side of the inner shaft and a bearing arranged between the inner shaft and the outer shaft, and the bearing installation tool comprises a guide support which comprises a guide column, a first supporting part and a second supporting part, and the first supporting part and the second supporting part are connected to the two ends of the guide column respectively. The second supporting part is used for being connected with the axial end of the inner shaft or the axial end of the outer shaft. And the pressing plate assembly is movably arranged between the first supporting part and the second supporting part, can move along the guide columns and is used for pushing and installing the bearing. According to the technical scheme, the mounting efficiency of the shafting can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shaft assembly, and more particularly to a bearing installation tool. BACKGROUND

[0002] A wind turbine generator set connects a generator and an impeller of the wind turbine generator set through a main shaft system, and converts wind energy captured by the impeller into electrical energy through the generator. The main shaft system of the wind turbine generator set usually includes a fixed shaft and a movable shaft which are sleeved with each other, and a bearing arranged between the fixed shaft and the movable shaft, and the bearing realizes the rotation support of the fixed shaft to the movable shaft.

[0003] In the prior art, the bearing is usually installed on the fixed shaft or the movable shaft by hot mounting. However, after the inner ring or the outer ring of the bearing is hot-mounted, the subsequent operation cannot be performed until the bearing is cooled, and the shaft assembly operation period is long. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide a bearing installation tool to improve the installation efficiency of the shaft system.

[0005] The bearing installation tool according to the embodiments of the present application comprises a guide support, the guide support comprises a guide column and a first support part and a second support part connected at both ends of the guide column respectively, the second support part is used for connecting with the axial end part of the inner shaft or the outer shaft; a pressing plate assembly movably arranged between the first support part and the second support part and capable of moving along the guide column, used for pushing the installation of the bearing.

[0006] According to an aspect of the present application, the pressing plate assembly comprises a pressing plate connecting part arranged between the first support part and the second support part and capable of moving along the guide column, the outer peripheral edge of the pressing plate connecting part is outwardly protruding relative to the outer peripheral edge of the second support part; a bearing pressing plate connected to the outer peripheral edge of the pressing plate connecting part, capable of being arranged on the outer periphery of the second support part and capable of moving with the pressing plate connecting part, used for pushing the installation of the bearing.

[0007] According to an aspect of the present application, the guide column comprises a plurality of guide columns which are arranged in parallel between the first support part and the second support part.

[0008] According to an aspect of the present application, the guide column comprises a first guide column arranged at the middle part of the first support part and the second support part; and a plurality of second guide columns arranged symmetrically around the outer periphery of the first guide column.

[0009] According to an aspect of the present application, the bearing includes a bearing inner ring and a bearing outer ring, the bearing outer ring is mounted on the inner side of the outer shaft, the bearing inner ring is mounted on the outer side of the inner shaft, the second support part is fixedly connected to the axial end face of the inner shaft, and the pressing plate assembly is used to push the bearing inner ring, or the second support part is fixedly connected to the axial end face of the outer shaft, and the pressing plate assembly is used to push the bearing outer ring.

[0010] According to an aspect of the present application, the bearing mounting tool further includes a sensor assembly for measuring the distance between the bearing outer ring and / or the bearing inner ring and the axial end face of the inner shaft.

[0011] According to an aspect of the present application, the bearing mounting tool further includes a driving part connected with the pressing plate assembly for driving the pressing plate assembly to move along the guide column.

[0012] According to an aspect of the present application, the driving part is a ring-shaped oil cylinder, the piston rod of the ring-shaped oil cylinder is ring-shaped, can be arranged around the first guide column, and is connected with the pressing plate assembly.

[0013] Additional aspects and / or advantages of the present general inventive concept will be set forth in part in the description that follows, and in part will be obvious from the description, or can be learned by practice of the present general inventive concept. BRIEF DESCRIPTION OF DRAWINGS

[0014] The above and other objects and features of the present application will become more apparent from the following description of embodiments taken in conjunction with the accompanying drawings, in which:

[0015] Figure 1 A sectional view of a shafting structure according to an embodiment of the present application is shown;

[0016] Figure 2 A flowchart of a shafting mounting method according to an embodiment of the present application is shown;

[0017] Figure 3 A perspective view of a bearing mounting tool according to an embodiment of the present application is shown;

[0018] Figure 4 A sectional view of a bearing mounting tool according to an embodiment of the present application is shown;

[0019] Figure 5 A perspective view of a guide bracket is shown;

[0020] Figure 6 A perspective view of a pressing plate connecting part is shown;

[0021] Figure 7 A perspective view of a bearing pressing plate is shown;

[0022] Figure 8 and Figure 9 is a process schematic of shafting installation using a bearing installation tooling according to an embodiment of the present application;

[0023] Figure 10 is a perspective view of a bearing installation tooling according to another embodiment of the present application;

[0024] Figure 11 is a sectional view of a bearing installation tooling according to another embodiment of the present application.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 10 - inner shaft; 100 - guide bracket; 10a - first axial end face;

[0027] 10b - second axial end face; 11 - shaft shoulder; 110 - guide post;

[0028] 111 - first guide post; 112 - second guide post; 115 - third guide rod;

[0029] 120 - first support portion; 130 - second support portion; 131 - through hole;

[0030] 20 - outer shaft; 200 - pressure plate assembly; 21 - bearing installation portion;

[0031] 210 - pressure plate connecting portion; 211 - first through hole; 212 - second through hole;

[0032] 213 - through hole; 214 - first bolt hole; 215 - second bolt hole;

[0033] 220 - bearing pressure plate; 30 - first bearing; 300 - sensor assembly;

[0034] 31 - bearing inner ring; 310 - installation bracket; 31a - first axial end face;

[0035] 31b - second axial end face; 32 - roller; 320 - first sensor;

[0036] 33 - bearing outer ring; 330 - second sensor; 33a - first axial end face;

[0037] 33b - second axial end face; 400 - driving portion; 40 - second bearing; 41 - bearing inner ring;

[0038] 41a - first axial end face; 41b - second axial end face; 42 - roller;

[0039] 43 - bearing outer ring; 43a - first axial end face; 43b - second axial end face;

[0040] 50 - bearing end cap; 51 - cover body; 52 - protrusion. DETAILED DESCRIPTION

[0041] The following detailed description is presented to aid in understanding the method, apparatus and / or system described herein. It is not intended to limit the method, apparatus and / or system described herein to the details described. Rather, various changes, modifications and equivalents can be used, and substitutions thereof can be made after reading the present disclosure. For example, the order of the operations described herein can be changed, and various elements can be added, omitted, or combined, as will be apparent to those of skill in the art upon reading the present disclosure. Moreover, in order to more clearly and concisely describe the method, apparatus and / or system, description of known features can be omitted.

[0042] The features described herein can be implemented in different forms and should not be construed as limited to the examples described herein. Rather, these examples are provided as a non-exhaustive list of a few of the many possible ways to implement the method, apparatus and / or system described herein.

[0043] As used herein, the term "and / or" includes any one of the associated listed items, as well as any combination of any two or more of the associated listed items.

[0044] Although terms such as "first", "second", and "third" can be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, the first element, first component, first region, first layer or first section referred to in the examples described herein can also be referred to as a second element, second component, second region, second layer or second section without departing from the teachings of the examples.

[0045] In the description, when an element such as a layer, a region, or a substrate is referred to as being "on" another element, "connected to" or "coupled to" another element, it can be directly on the other element, directly connected to or coupled to the other element, or one or more other elements can be interposed therebetween. In contrast, when an element is referred to as being "directly on" another element, "directly connected to" or "directly coupled to" another element, no other elements are interposed therebetween.

[0046] The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including" and "has" are intended to be inclusive and allow for any additional

[0047] The terms "upper", "lower", "top", "bottom", etc. used in the present application are defined based on the position of the product in the normal use state, unless otherwise specified.

[0048] Unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs when read in light of the present application. Unless explicitly defined otherwise, terms such as, for example, terms defined in a general dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present application, and should not be interpreted in an idealized or overly formalized manner.

[0049] Figure 1 is a schematic sectional view of a main shaft system in an existing wind turbine generator set. As shown in Figure 1 , the shaft system includes an inner shaft 10, an outer shaft 20 sleeved on the outer side of the inner shaft 10, and bearings provided between the inner shaft 10 and the outer shaft 20, so that the outer shaft 20 and the inner shaft 10 can rotate relative to each other.

[0050] The bearings include a first bearing 30 and a second bearing 40 arranged at intervals, respectively arranged at the front end (the end connected to the impeller) and the rear end (the end connected to the generator) of the shaft system, and the first bearing 30 and the second bearing 40 can be respectively referred to as front bearing and rear bearing. The first bearing 30 and the second bearing 40 can be single-row tapered roller bearings (TRB), so that the shaft system is a TRB+TRB shaft system structure. In addition, the first bearing 30 and the second bearing 40 can also be angular contact ball bearings.

[0051] The shaft system also includes a bearing end cover 50 fixedly connected to the end of the inner shaft 10 for applying a pre-tightening force to the bearings. The bearing end cover 50 can include a cover body 51 and a protruding portion 52 formed on the cover body 51. The cover body 51 is fixedly connected to the end of the inner shaft 10, and the protruding portion 52 is annular and pressed against the second bearing 40, so that the shaft system has a certain pre-tightening force.

[0052] As shown in Figure 1As shown, the inner shaft 10 has opposite first and second ends 10a and 10b. A shoulder 11 can be formed on the first end 10a, which projects outwardly relative to the axial direction of the inner shaft 10, forming an outer flange. A first bearing 30 can be installed at the shoulder 11, thereby avoiding falling off from the inner shaft 10.

[0053] The first bearing 30 can include a bearing inner race 31, which can be fitted on the outer circumference of the inner shaft 10 and abut against the shoulder 11, rollers 32, and a bearing outer race 33, which can be installed in the bearing installation portion 21 in the outer shaft 20.

[0054] Similarly, the second bearing 40 can include a bearing inner race 41, which can be fitted on the outer circumference of the inner shaft 10, rollers 42, and a bearing outer race 43, which can be installed in the bearing installation portion 21 in the outer shaft 20. The bearing inner race 41 can have first and second axial end faces 41a and 41b, and the bearing outer race 43 can have first and second axial end faces 43a and 43b.

[0055] In installing the above shafting structure, the following steps are generally adopted in the prior art.

[0056] First, the bearing inner race 31 and the rollers 32 of the first bearing 30 are fitted on the inner shaft 10. Before installation, the bearing inner race 31 and the rollers 32 of the first bearing 30 are heated to facilitate fitting of the bearing inner race 31 of the first bearing 30 on the inner shaft 10.

[0057] Then, the bearing outer race 33 of the first bearing 30 and the bearing outer race 43 of the second bearing 40 are installed in the outer shaft 20. Similarly, before installation, the outer shaft 20 is heated to facilitate installation of the bearing outer race 33 of the first bearing 30 and the bearing outer race 43 of the second bearing 40 in the outer shaft 20. After the inner shaft 10 and the outer shaft 20 are cooled to room temperature, the outer shaft 20 is fitted on the inner shaft 10, and the outer shaft 20 can be rotated relative to the inner shaft 10 by an external force to enable the rollers 32 of the first bearing 30 to be in uniform and sufficient contact with the bearing inner race 31 and the bearing outer race 33.

[0058] Next, the bearing inner race 41 and the rollers 42 of the second bearing 40 are fitted on the inner shaft 10. Similarly, before installation, the bearing inner race 41 and the rollers 42 of the second bearing 40 are heated to expand, thereby facilitating fitting on the inner shaft 10.

[0059] After the bearing inner race 41 and the rollers 42 of the second bearing 40 are cooled to room temperature, the bearing end cover 50 is installed, thereby completing installation of the shafting.

[0060] In existing technology, the preload of the shaft system is controlled by controlling the length of the protrusion 52 of the bearing end cover 50. The length of the protrusion 52 is usually determined using a formula method. However, the formula method has a large dimensional error in matching the end cover stop. This error is related to factors such as the measurement accuracy of the dimensions of components such as the spindle, bearing housing, and bearing, the measurement accuracy of the height difference between the spindle and the outer ring of the rear bearing after shaft system assembly, and the accuracy of shaft system force simulation. Errors in any of these aspects will directly affect the final result, making it impossible for the first bearing 30 and the second bearing 40 to obtain the expected preload. Therefore, it may affect the stiffness and life of the first bearing 30 and the second bearing 40, thereby affecting the reliability of the entire shaft system structure.

[0061] To address the aforementioned problems, this application provides a shaft system installation method for accurately controlling the preload of the shaft system. The shaft system installation method of this application will now be described in detail.

[0062] According to the shaft installation method of this application, the installation steps before installing the inner ring 41 of the second bearing 40 can be carried out in the same way as in the prior art.

[0063] Specifically, such as Figure 2 As shown, in step S10, the inner ring 31 of the first bearing 30 is fitted onto the inner shaft 10 and supported at the shoulder 11. In step S20, the outer ring 33 of the first bearing 30 and the outer ring 43 of the second bearing 40 are installed inside the outer shaft 20. Next, in step S30, the outer shaft 20 is fitted onto the inner shaft 10, completing the installation of the first bearing 30.

[0064] After the outer shaft 20 is fitted onto the inner shaft 10, according to the shaft system installation method of this application, in step S40, an axial preload is applied to the outer shaft 20. This axial preload is the preload force of the desired shaft system structure. In this case, step S50 is performed to measure the distance between the outer ring 43 of the bearing and the axial end face of the inner shaft 10, and this distance value is recorded as L. Since the second bearing 40 is closer to the second end of the inner shaft 10 and is easier to measure, the distance between the first axial end face 43a of the outer ring 43 of the bearing and the second end 10b of the inner shaft 10 can be measured here, and recorded as L.

[0065] In the step of applying a predetermined axial preload to the outer shaft 20, either an axial compressive force can be applied to the outer shaft 20 or an axial compressive force can be applied to the outer ring 43 of the bearing. Since the end face of the outer ring 43 is small and inconvenient for applying force, the compressive force can be applied to the outer shaft 20. Under the action of the axial compressive force, the clearance of the first bearing 30 will decrease, thereby achieving a certain preload.

[0066] After the distance value L is obtained, the axial pre-tightening force is removed in step S60. The first bearing 30, which is compressed and has a certain amount of deformation, and the inner shaft 10 and the outer shaft 20, after the external force is removed, the deformation will recover to a certain extent, so that the distance between the axial end surface of the bearing outer ring 43 and the inner shaft 10 will be less than the aforementioned distance value L.

[0067] Then, step S70 is performed to install the bearing inner ring 41 of the second bearing 40. Specifically, the bearing inner ring 41 is sleeved on the second end of the inner shaft 10, and the bearing inner ring 41 is pushed inward. When installing the bearing inner ring 41, the rollers 42 of the second bearing 40 can be sleeved on the inner shaft 10 together with the bearing inner ring 41.

[0068] During the movement of the bearing inner ring 41 inward, the bearing inner ring 41 will gradually approach the bearing outer ring 43. The bearing inner ring 41 transmits the compression force to the bearing outer ring 43 through the rollers 42 under the action of the predetermined axial compression force. According to the relationship that the action force is equal to the reaction force, the bearing outer ring 43 will be subjected to the same axial compression force, and the first bearing 30 will also be subjected to the same axial compression force.

[0069] In step S70, that is, during the process of pushing the bearing inner ring 41 towards the second end of the inner shaft 10, the distance between the axial end surface of the bearing outer ring 43 and the axial end surface of the inner shaft 10 is measured in real time. When the distance between the axial end surface of the bearing outer ring 43 and the axial end surface of the inner shaft 10 is equal to the aforementioned distance value L, it can be determined that the second bearing 40 is installed in place, and the shafting has the desired pre-tightening force. At this time, the pushing of the bearing inner ring 41 is stopped.

[0070] Then, in step S80, the distance between the axial end surface of the bearing inner ring 41 and the axial end surface of the inner shaft 10 is measured to obtain a distance value S. The bearing end cover 50 is designed according to the distance value S, so that the length of the protruding part 52 of the bearing end cover 50 is S. The bearing end cover 50 is installed on the inner shaft 10, and after the bearing end cover 50 is installed in place, the desired pre-tightening force can be applied to the shafting.

[0071] According to the shafting installation method of the present application, since the distance S is the distance between the bearing inner ring 41 of the second bearing 40 and the rear end surface of the inner shaft 10 under the action of the desired pre-tightening force. Therefore, compared with the method for obtaining the distance S in the prior art, the distance S obtained by the method according to the present application is more accurate, so that the bearing pre-tightening force of the shafting can be more accurately controlled, and the service life and stiffness of the shafting are ensured.

[0072] Although the shaft system installation method of the present application is described in the foregoing embodiments by taking the main shaft system of a wind turbine generator as an example, the shaft system installation method of the present application is not limited to only being applicable to the main shaft system of a wind turbine generator, but can also be used to install other shaft system structures that need to obtain a desired pre-tightening force. For example, similar to the main shaft system of a wind turbine generator, the shaft system structure includes an inner shaft, an outer shaft sleeved outside the inner shaft, and a bearing rotatably arranged between the inner shaft and the outer shaft. The bearing can include a first bearing and a second bearing. The first bearing can be installed first, and before the inner ring of the second bearing is installed, a desired axial pre-tightening force is applied to the shaft system, the distance L between the outer ring of the second bearing and the end face of the inner shaft is measured, and then the inner ring of the second bearing is installed. In the case where the distance between the outer ring of the second bearing and the end face of the inner shaft is equal to the distance value L measured in the foregoing, it is determined that the second bearing is installed in place. At this time, the distance S between the inner ring of the bearing and the end face of the inner shaft is measured, and the bearing end cover is designed according to the distance S, so that the pre-tightening force of the shaft system can be more accurately controlled.

[0073] In the prior art, the bearing inner ring 41 and the roller 42 of the second bearing 40 are heated and then sleeved on the inner shaft 10 by hot mounting. However, after the bearing inner ring 41 is sleeved, the subsequent operation cannot be performed until the bearing cools down, and the production cycle is relatively long.

[0074] According to the shaft system installation method of the present application, the bearing inner ring 41 and the roller 42 of the second bearing 40 are installed on the inner shaft 10 at room temperature, thereby avoiding the problem of a long assembly operation cycle caused by hot mounting.

[0075] In order to facilitate the sleeving of the bearing inner ring 41 of the second bearing 40 on the inner shaft 10 at room temperature, a chamfer can be arranged at the end of the inner shaft 10, which can be a round chamfer or an inclined chamfer, so that the diameter of the second axial end face of the inner shaft 10 is appropriately reduced. In addition, a chamfer can also be designed at one axial end of the bearing inner ring 41, so that the inner diameter of one axial end of the bearing inner ring 41 is appropriately increased.

[0076] In order to enable the bearing inner ring 41 to be smoothly installed on the inner shaft 10 at room temperature, according to an embodiment of the present application, a bearing installation tool is also provided.

[0077] Figure 3 A perspective view of the bearing installation tool according to an embodiment of the present application is shown, Figure 4 A sectional view of the bearing installation tool according to an embodiment of the present application is shown.

[0078] As Figure 3 and Figure 4 shown, the bearing installation tool according to an embodiment of the present application includes a guide bracket 100 and a pressing plate assembly 200 movably connected with the guide bracket 100. As Figure 5As shown, the guide bracket 100 comprises a guide column 110 and a first support portion 120 and a second support portion 130 connected at two ends of the guide column 110 respectively, and the second support portion 130 is used for connecting with the axial end portion of the inner shaft 10, so as to fix the guide bracket 100 on the inner shaft 10.

[0079] The pressing plate assembly 200 is movably arranged between the first support portion 120 and the second support portion 130 and can move along the guide column 110, and is used for pushing the second bearing 40. In the case of pushing the bearing inner ring 41 on which the second bearing 40 is mounted, the guide bracket 100 is fixed on the inner shaft 10 and can guide the movement of the pressing plate assembly 200, so that the pressing plate assembly 200 can exert a pushing force on the bearing inner ring 41 in the axial direction of the inner shaft 10 in the process of pushing the bearing inner ring 41, and prevent the bearing inner ring 41 from being deflected in the process of mounting.

[0080] The first support portion 120 and the second support portion 130 can both be in the shape of a plate, which can enhance the support strength and improve the support stability, and also enable the second support portion 130 to abut against the end face of the inner shaft 10 with a larger area, so that the stress distribution is more uniform and the guide bracket 100 is prevented from tilting.

[0081] As shown, Figure 4 The guide column 110 can be multiple, so as to guide the up-and-down movement of the pressing plate assembly 200 at multiple positions. As an example, the guide column 110 comprises a first guide column 111 and multiple second guide columns 112. The first guide column 111 can be arranged at the middle portion of the guide bracket 100. The first support portion 120 and the second support portion 130 are generally circular plates, and the two ends of the first guide column 111 are connected to the middle portions of the first support portion 120 and the second support portion 130 respectively. The multiple second guide columns 112 are arranged symmetrically around the first guide column 111. The diameter of the first guide column 111 is relatively larger than the diameter of the second guide column 112, so that the first guide column 111 plays a major guiding role and the second guide column 112 plays an auxiliary guiding role, thereby ensuring that the pressing plate assembly 200 can move along the axial direction of the inner shaft 10 and preventing the pressing plate assembly 200 from being deflected in the process of moving.

[0082] As shown, Figure 2 and Figure 3 The pressing plate assembly 200 comprises a pressing plate connecting portion 210 and a bearing pressing plate 220, and the pressing plate connecting portion 210 is arranged between the first support portion 120 and the second support portion 130 and can move along the guide column 110. The pressing plate connecting portion 210 is generally a circular plate, and a through hole capable of cooperating with the guide column 110 is formed in the pressing plate connecting portion 210. The through hole comprises a first through hole 211 and a second through hole 212, the first guide column 111 is arranged in the first through hole 211, and the second guide column 112 is arranged in the second through hole 212.

[0083] The diameter of the pressing plate connecting portion 210 is greater than the diameter of the second support portion 130, so that the outer peripheral edge of the pressing plate connecting portion 210 protrudes outward relative to the outer peripheral edge of the second support portion 130. The bearing pressing plate 220 is connected to the outer peripheral edge of the pressing plate connecting portion 210, can be disposed at the outer periphery of the second support portion 130 and can move with the pressing plate connecting portion 210 to push the bearing inner ring 41 on which the second bearing 40 is mounted.

[0084] As shown in Figure 6 , the bearing pressing plate 220 can be annular to uniformly apply force to the bearing inner ring 41 in the circumferential direction. However, the implementation form of the bearing pressing plate 220 is not limited to an annular plate, but can also be a plurality of protruding columns connected to the pressing plate connecting portion 210, which are arranged at intervals along the circumferential direction to apply extrusion force to the bearing inner ring 41. Therefore, the visual form of the bearing pressing plate 220 is not limited to the above examples, as long as it can achieve the extrusion of the second bearing 40 in the axial direction of the inner shaft 10.

[0085] In order to realize the connection between the pressing plate connecting portion 210 and the bearing pressing plate 220, as shown in Figure 6 and Figure 7 , first and second bolt holes 214 and 215 are respectively provided on the pressing plate connecting portion 210 and the bearing pressing plate 220, so that the connection between the two can be realized by bolts. In addition, the pressing plate connecting portion 210 and the bearing pressing plate 220 can be connected by welding or formed as an integral structure.

[0086] The bearing mounting tool according to the embodiment of the application further comprises a sensor assembly 300 for measuring the distance between the second bearing 40 and the axial end face of the inner shaft 10 to determine whether the second bearing 40 is installed in place.

[0087] Specifically, in the case of mounting the bearing inner ring 41 of the second bearing 40 by using the bearing mounting tool according to the embodiment of the application in the shafting mounting method as described above, the sensor assembly 300 can measure the distance between the axial end face of the bearing outer ring 43 and the axial end face of the inner shaft 10, and when the distance value is L, it can be determined that the bearing inner ring 41 has been installed in place. At this time, the bearing end cover 50 can be prepared according to the distance between the bearing inner ring 41 and the axial end face of the inner shaft 10.

[0088] The sensor assembly 300 comprises a mounting bracket 310, a first sensor 320 and a second sensor 330, the mounting bracket 310 can be mounted on the guide bracket 100 or the pressing plate assembly 200. The first sensor 320 is used to measure the distance L1 between the axial end face of the inner shaft 10, and the second sensor 330 is used to measure the distance L2 between the axial end face of the bearing outer ring 43. By L2-L1, the distance between the axial end face of the bearing outer ring 43 and the inner shaft 10 can be obtained. When the distance between the axial end face of the bearing outer ring 43 and the inner shaft 10 is the distance value L measured in the front, it is determined that the second bearing 40 is installed in place, and at this time, the length of the protruding part 52 of the bearing end cover 50 can be determined according to the distance between the bearing inner ring 41 and the axial end face of the inner shaft 10.

[0089] The sensor assembly 300 can be provided in multiple numbers and arranged at intervals along the circumferential direction of the pressing plate assembly 200 to measure at multiple positions, thereby ensuring the accuracy of the measurement results and ensuring that the bearing inner ring 41 has been installed in place in the entire circumferential direction.

[0090] According to the embodiment of the present application, the sensor assembly 300 is mounted on the pressing plate assembly 200. Specifically, the mounting bracket 310 comprises a bracket body and first and second legs, the bracket body is mounted on the pressing plate connecting portion 210, and the first and second sensors 320 and 330 are respectively mounted on the first and second legs. The pressing plate connecting portion 210 is provided with a through hole 213, and the second support portion 130 is provided with a through hole 131 opposite to the through hole 213. The first leg and the first sensor 320 can pass through the through hole 213 and the through hole 131, so as to measure the distance L1 between the mounting bracket 310 and the axial end face of the inner shaft 10. The second sensor 330 on the second leg can directly face and contact the bearing outer ring 43, so as to measure the distance L2 between the bearing outer ring 43. The structure of the sensor assembly 300 is not limited to the above example, as long as the distance between the bearing outer ring 43 and the axial end face of the inner shaft 10 can be measured.

[0091] As shown in Figure 10 and Figure 11 According to another embodiment of the present application, the bearing installation tool can further comprise a driving portion 400 provided on the mounting bracket 310, used to drive the pressing plate assembly 200 to move along the guide column 110.

[0092] The driving portion 400 can be a gas cylinder, a hydraulic cylinder, a lead screw, etc. According to the embodiment of the present application, the driving portion 400 is an annular oil cylinder, which can be arranged around the first guide column 111. Specifically, as shown in Figure 10 and Figure 11As shown, the annular oil cylinder comprises an annular cylinder body 410 and an annular piston 420 arranged in the annular cylinder body 410. One of the annular cylinder body 410 and the annular piston 420 is fixedly connected with the first support part 120, and the other of the annular cylinder body 410 and the annular piston 420 is connected with the pressing plate connecting part 210, so as to drive the pressing plate connecting part 210 to move up and down. By adopting the annular oil cylinder, uniform force can be applied in the circumferential direction, so that the bearing inner ring 41 can move along the axial direction of the inner shaft 10, and deflection is avoided.

[0093] In the example shown in the drawings, the bearing installation tool further comprises a plurality of third guide rods 115 arranged between the first support part 120 and the pressing plate assembly 200 around the outer periphery of the annular oil cylinder. The third guide rods 115 are telescopic rods that can be correspondingly elongated and shortened with the movement of the annular oil cylinder. By arranging a plurality of third guide rods 115, the driving operation of the annular oil cylinder can be more stable.

[0094] Since the bearing is installed at room temperature, the installation resistance is large, and uneven force in the circumferential direction can easily cause the bearing installation to be stuck. However, by adopting the bearing installation tool according to the embodiments of the present application, uniform force can be applied in the circumferential direction during the bearing installation process, and the bearing inner ring or the bearing outer ring can be sleeved along the axial direction, so that the bearing inner ring 41 can be installed at room temperature, avoiding the problem of long operation cycle in the hot installation method, and improving the installation efficiency.

[0095] Although the bearing installation tool according to the embodiments of the present application is described by taking the installation of the bearing inner ring of the second bearing 40 as an example in the foregoing description, the bearing installation tool is not limited to the installation of the bearing inner ring, but can also be used to install the bearing outer ring. In the case of installing the bearing outer ring 43, the second support part 130 can be fixedly installed at the axial end of the outer shaft 20. In the case of installing the bearing outer ring 43, the installation method and operation process are similar to those of installing the bearing inner ring 41, and will not be described again here.

[0096] Although the specific details of the embodiments of the present application have been described in detail with reference to the drawings, the scope of protection of the present application is not limited by the description. Those skilled in the art can make corresponding modifications and variations without departing from the principles of the present application, and these modifications and variations will fall within the scope of protection of the present application.

Claims

1. A bearing mounting fixture for mounting a shaft system, the shaft system comprising an inner shaft (10), an outer shaft (20) disposed outside the inner shaft (10), and a bearing (40) disposed between the inner shaft (10) and the outer shaft (20), characterized in that, The bearing mounting fixture includes: The guide bracket (100) includes a guide post (110) and a first support portion (120) and a second support portion (130) respectively connected to both ends of the guide post (110). The second support portion (130) is used to connect to the axial end of the inner shaft (10) or the outer shaft (20). The pressure plate assembly (200) is movably disposed between the first support (120) and the second support (130) and is movable along the guide post (110) for pushing and mounting the bearing (40).

2. The bearing mounting fixture according to claim 1, characterized in that, The pressure plate assembly (200) includes: A pressure plate connecting part (210) is disposed between the first support part (120) and the second support part (130) and is movable along the guide post (110). The outer peripheral edge of the pressure plate connecting part (210) protrudes outward relative to the outer peripheral edge of the second support part (130). The bearing pressure plate (220) is connected to the outer peripheral edge of the pressure plate connecting part (210), and can be disposed on the outer periphery of the second support part (130) and can move with the pressure plate connecting part (210) to push and install the bearing (40).

3. The bearing mounting fixture according to claim 2, characterized in that, The guide post (110) comprises a plurality of posts, which are arranged in parallel between the first support portion (120) and the second support portion (130).

4. The bearing mounting fixture according to claim 3, characterized in that, The guide post (110) includes: The first guide post (111) is disposed in the middle of the first support part (120) and the second support part (130); Multiple second guide posts (112) are symmetrically arranged around the outer periphery of the first guide post (111).

5. The bearing mounting fixture according to claim 4, characterized in that, The bearing (40) includes an inner bearing ring (41) and an outer bearing ring (43). The outer bearing ring (43) is mounted on the inner side of the outer shaft (20), and the inner bearing ring (41) is mounted on the outer side of the inner shaft (10). The second support (130) is fixedly connected to the axial end face of the inner shaft (10), and the pressure plate assembly (200) is used to push the inner ring (41) of the bearing; or, the second support (130) is fixedly connected to the axial end face of the outer shaft (20), and the pressure plate assembly (200) is used to push the outer ring (43) of the bearing.

6. The bearing mounting fixture according to claim 5, characterized in that, The bearing mounting fixture also includes a sensor assembly (300) for measuring the distance between the outer ring (43) and / or the inner ring (41) of the bearing and the axial end face of the inner shaft (10).

7. The bearing mounting fixture according to claim 4, characterized in that, The bearing mounting fixture also includes a drive unit, which is connected to the pressure plate assembly (200) and is used to drive the pressure plate assembly (200) to move along the guide post (110).

8. The bearing mounting fixture according to claim 7, characterized in that, The drive unit is an annular hydraulic cylinder that can be arranged around the first guide post (111) and connected between the first support unit (120) and the pressure plate assembly (200).

9. The bearing mounting fixture according to claim 8, characterized in that, The annular cylinder includes an annular cylinder body and an annular piston disposed in the annular cylinder body. One of the annular cylinder body and the annular piston is connected to the first support (120), and the other of the annular cylinder body and the annular piston is connected to the pressure plate assembly (200).

10. The bearing mounting fixture according to claim 8, characterized in that, The bearing installation fixture also includes multiple third guide rods (115), which are arranged around the outer periphery of the annular cylinder between the first support (120) and the pressure plate assembly (200). The third guide rods (115) are telescopic rods.

11. The bearing mounting fixture according to claim 6, characterized in that, The sensor assembly (300) includes a mounting bracket (310), a first sensor (320) and a second sensor (330) mounted on the mounting bracket (310). The first sensor (320) is used to measure the distance between the mounting bracket (310) and the axial end face of the inner shaft (10). The second sensor (330) is used to measure the distance between the mounting bracket (310) and the axial end face of the outer ring (43) of the bearing or the distance between the inner ring (41) of the bearing and the axial end face of the inner shaft (10).

12. The bearing mounting fixture according to claim 11, characterized in that, The sensor assembly (300) is mounted on the pressure plate connecting part (210). The mounting bracket (310) includes a bracket body, a first leg and a second leg connected to the bracket body. The first sensor (320) and the second sensor (330) are respectively mounted on the first leg and the second leg. The pressure plate connecting part (210) is provided with a first through hole (213), and the second support part (130) is provided with a second through hole (131). The first through hole (213) and the second through hole (131) are vertically opposite each other. The first sensor can pass through the first through hole (213) and the second through hole (131) to measure the distance between the mounting bracket (310) and the axial end face of the inner shaft (10).

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