Apparatus and method for adjusting bearing assembly housing roundness and eccentricity

Abstract

The application relates to the technical field of rolling bearing assembly, in particular to a device and method for adjusting the roundness and eccentricity of a bearing assembly shell, which comprises a bearing seat, a plurality of adjusting members and a spacer sleeve. The bearing seat is provided with a cylindrical part, the cylindrical part is provided with a plurality of connecting fitting holes arranged along the circumference of the cylindrical part and penetrating through the cylindrical part, and the inner diameter surface is provided with a limiting protrusion. The adjusting member is connected with the connecting fitting hole, and the adjusting member can be fed or retracted in the connecting fitting hole. The spacer sleeve is arranged on the inner side of the cylindrical part and is stopped on one side of the limiting protrusion. The outer diameter surface of the spacer sleeve abuts against the end of the adjusting member, and the inner diameter surface of the spacer sleeve is in close contact with the outer diameter surface of the bearing outer ring. When the adjusting member is fed, the adjusting member forces the spacer sleeve to deform, so as to adjust the bearing outer ring. The application can realize the adjustment of the roundness and eccentricity of different bearing seat holes, and can test and optimize the verification of the service performance influence of the assembly and adjustment phase on the rotor system for various types of bearings. Moreover, the device is convenient, economical and reliable to adjust.

Description

Technical Field

[0001] This invention relates to the field of rolling bearing assembly technology, specifically to a device and method for adjusting the roundness and eccentricity of a bearing assembly housing. Background Technology

[0002] The installation and commissioning process of rolling bearings on a rotor system is affected by a variety of factors, and the phase adjustment is an important part of this. In order to improve the service performance of the rotor system after the rolling bearings are assembled, it is usually necessary to follow the principle of directional assembly. The so-called directional assembly of rolling bearings means that the eccentricity of the inner ring of the bearing and the eccentricity of the journal, and the eccentricity of the outer ring of the bearing and the eccentricity of the bearing housing bore are respectively arranged in the same axial section and assembled in a certain direction. This can offset some of the machining errors of the mating dimensions and improve the rotational accuracy of the spindle. Reference Yang Zuoyu, Directional Assembly of Machine Tool Spindles [J]. Mechanical Worker. Cold Working, 2003(06):73-74.

[0003] However, traditional tooling has a single error, and the adjustment of the assembly and adjustment phase usually relies on repeated disassembly and assembly. It is not convenient and effective to optimize and verify the assembly and adjustment phase in order to obtain the best rotor system service performance. Furthermore, it is not possible to conduct service performance tests under various assembly error conditions in order to study the influence mechanism of rolling bearing assembly and adjustment process on rotor system service performance. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a device and method for adjusting the roundness and eccentricity of bearing assembly housing. It can conveniently realize the adjustment of different assembly error conditions, that is, the roundness and eccentricity of different bearing seat holes. It can be used to test and optimize the impact of assembly and adjustment phase on the service performance of rotor system for multiple types of bearings. Moreover, the device is convenient to adjust, economical and reliable.

[0005] To achieve the above objectives, the present invention provides a device for adjusting the roundness and eccentricity of a bearing assembly housing. The device includes a bearing housing, multiple adjusting members, and a spacer. The bearing housing has a cylindrical portion with multiple connecting holes arranged circumferentially along the cylindrical portion and penetrating the inner and outer diameter surfaces of the cylindrical portion. The inner diameter surface has a limiting protrusion. The multiple adjusting members are connected one-to-one with the multiple connecting holes, and the adjusting members can advance or retract within the connecting holes. The spacer is located inside the cylindrical portion and stops on one side of the limiting protrusion. The outer diameter surface of the spacer abuts against the end of the adjusting member, and the inner diameter surface of the spacer fits against the outer diameter surface of the bearing outer ring. When the adjusting member advances, it forces the spacer to deform, thereby adjusting the bearing outer ring.

[0006] Furthermore, the width of the spacer is greater than the width of the outer ring of the bearing.

[0007] Furthermore, the plurality of connecting and mating holes are evenly distributed at equal intervals.

[0008] Furthermore, the end of the adjusting member abuts against the spacer, and the axial position of the abutment corresponds to halfway down the outer diameter surface of the bearing outer ring.

[0009] Furthermore, the bearing housing includes a support base and the cylindrical portion disposed on the upper part of the support base.

[0010] Furthermore, one or more grooves are provided on the support base.

[0011] Furthermore, the limiting protrusion includes a spacer shoulder that protrudes from the inner diameter surface of the cylindrical portion.

[0012] Furthermore, the connecting hole includes a threaded hole formed in the cylindrical portion.

[0013] Furthermore, the adjusting element includes a set screw that mates with the threaded hole.

[0014] On the other hand, the technical solution provided by the present invention is a method for adjusting the roundness and eccentricity of a bearing assembly housing, comprising:

[0015] Establish finite element models of the spacer and the bearing outer ring, including establishing the surface-to-surface contact between them;

[0016] A forced displacement load is applied at the node where the outer surface of the spacer contacts the adjusting component to obtain the influence of the adjusting component feed rate on the bearing ring deformation and to plot the forced displacement load-bearing outer ring deformation curve.

[0017] Based on the forced displacement load-bearing outer ring deformation curve, select the adjustment component and determine the corresponding feed rate;

[0018] Adjusting the corresponding adjustment component according to the feed amount forces the spacer to deform, thereby forming different assembly shell roundness and eccentric working conditions.

[0019] The beneficial effects of this invention are: the device can conveniently achieve multi-roundness and eccentricity adjustment of the bearing housing under test, thereby enabling the conduct of rotor system service performance experiments and optimization verification of assembly and adjustment phases. Finite element contact analysis is used to simulate the influence of the feed rate of the adjusting component on the deformation of the bearing ring by applying a forced displacement load to the spacer, thus allowing for the selection of a suitable feed rate for the experiment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the device for adjusting the roundness and eccentricity of the bearing assembly housing in one embodiment of the present invention before assembly;

[0021] Figure 2 This is a schematic diagram of a device for adjusting the roundness and eccentricity of a bearing assembly housing applied to a rolling bearing vibration testing equipment BVT-8, according to an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the assembled structure of the device for adjusting the roundness and eccentricity of the bearing assembly housing according to an embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the bearing housing structure in one embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the spacer structure in one embodiment of the present invention;

[0025] Figure 6 This is a finite element model of the spacer and bearing outer ring established in one embodiment of the present invention;

[0026] Figure 7 This is a curve showing the set screw feed rate versus bearing outer ring displacement in one embodiment of the present invention.

[0027] Figure 8 This is a cloud diagram showing the deformation displacement of the outer ring of the bearing when the displacement load of the device used to adjust the roundness and eccentricity of the bearing assembly housing is 0.00688 mm, according to one embodiment of the present invention.

[0028] Figure 9 This is a cloud diagram showing the deformation displacement of the outer ring of the bearing when the displacement load of the device used to adjust the roundness and eccentricity of the bearing assembly housing is 0.01 mm, according to one embodiment of the present invention.

[0029] Figure 10 This is a cloud diagram showing the deformation displacement of the outer ring of the bearing when the displacement load of the device used to adjust the roundness and eccentricity of the bearing assembly housing is 0.014 mm, according to an embodiment of the present invention.

[0030] Figure 11 This is a cloud diagram showing the deformation displacement of the outer ring of the bearing when the displacement load of the device used to adjust the roundness and eccentricity of the bearing assembly housing is 0.018 mm, according to one embodiment of the present invention.

[0031] Figure 12 This is a cloud diagram showing the deformation displacement of the outer ring of the bearing when the displacement load of the device used to adjust the roundness and eccentricity of the bearing assembly housing is 0.022 mm, according to one embodiment of the present invention.

[0032] In the diagram: 10. A device used to adjust the roundness and eccentricity of the bearing assembly housing.

[0033] 100. Bearing housing; 110. Cylindrical section; 110a. Inner diameter surface of the cylindrical section; 110b. Outer diameter surface of the cylindrical section; 111. Connecting mating hole; 112. Limiting protrusion; 120. Support seat; 121. Slide groove.

[0034] 200. Adjusting parts

[0035] 300, spacer; 300a, inner diameter surface of spacer; 300b, outer diameter surface of spacer.

[0036] 20. Bearing outer ring; 20a. Outer diameter surface of bearing outer ring.

[0037] 30. Rolling bearing vibration testing equipment; 31. Main shaft; 32. Vibration acceleration sensor; 33. Mandrel; 34. Axial loading mechanism. Detailed Implementation

[0038] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] See Figure 1 and Figure 2 One embodiment of the present invention provides a device 10 for adjusting the roundness and eccentricity of a bearing assembly housing. This device can create different bearing seat hole roundnesses, thereby generating different eccentric working conditions, achieving the goal of creating multiple working conditions within the same housing. It is applied to experiments involving adjustments of different assembly phases and optimization of rotor system service performance. As an example, this embodiment applies it to an existing rolling bearing vibration testing equipment 30, model BVT-8.

[0040] The device 10 for adjusting the roundness and eccentricity of the bearing assembly housing includes a bearing housing 100, a plurality of adjusting members 200, and a spacer 300. The bearing housing 100 has a cylindrical portion 110, which has a plurality of connecting holes 111 arranged circumferentially along the cylindrical portion 110 and penetrating the inner diameter surface 110a and the outer diameter surface 110b of the cylindrical portion. The inner diameter surface 110a of the cylindrical portion has a limiting protrusion 112; a stepped receiving groove is formed on the side of the inner diameter surface 110a and the limiting protrusion 112. The plurality of adjusting members 200 are connected one-to-one with the plurality of connecting holes 111, and the adjusting members 200 can advance or retract within the connecting holes 111. The spacer 300 is located inside the cylindrical part 110 and stops on one side of the limiting protrusion 112. The outer diameter surface 300b of the spacer abuts against the end of the adjusting member 200, and the inner diameter surface 300a of the spacer fits against the outer diameter surface 20a of the bearing outer ring. When the adjusting member 200 is fed, the adjusting member 200 forces the spacer 300 to deform in order to adjust the bearing outer ring 20.

[0041] like Figure 2 As shown, in one embodiment, the device 10 for adjusting the roundness and eccentricity of the bearing assembly housing is applied to the rolling bearing vibration testing equipment 30. The bearing inner ring is mounted on the mandrel 33, and the bearing housing 100, spacer 300, and bearing outer ring 20 are assembled together and fixedly installed on the test bench. The spacer 300 is pressed against by the adjusting member 200 on the bearing housing 100, and the spacer 300 deforms and transmits the force to the bearing outer ring 20. The feed amount of each adjusting member 200 is adjusted to form different assembly housing roundness and eccentricity conditions. The axial loading mechanism 34 loads the end face of the bearing outer ring, and the bearing inner ring is rotated by the main shaft 31. The vibration acceleration sensor 32 is placed on the outer surface of the bearing housing 100, corresponding to the middle position of the bearing outer ring 20, to conduct experiments on the impact of the assembly phase on the service performance of the rotor system.

[0042] Preferably, in one embodiment, the plurality of connecting holes 111 are evenly spaced and distributed. Specifically, the included angle between two adjacent connecting holes 111 is not limited and can be set according to actual needs. As an example, see [reference needed]. Figure 3 Multiple connecting holes 111 are evenly distributed at 45-degree angles. In one embodiment, the end of the adjusting member 200 abuts against the spacer 300, with its axial position corresponding to the axial halfway point of the outer diameter surface 20a of the bearing outer ring. In this way, force can be applied to the spacer 300 more evenly, thereby causing deformation of the bearing outer ring.

[0043] See Figure 6 and Figure 7It should be noted that the feed rate of the adjusting component 200 can be calculated using finite element contact analysis. Taking the adjusting component 200 as an example, a finite element model of the spacer 300 and the bearing outer ring 20 is first established. The feed rate of the adjusting component 200 and the deformation of the bearing outer ring are calculated by using forced displacement load to recommend a suitable thread feed rate to meet the requirements of different working conditions.

[0044] See Figures 8-12 The diagram shows the deformation displacement contours of the bearing outer ring corresponding to different displacement loads.

[0045] See Figure 1 In one embodiment, the width of the spacer 300 is greater than the width of the bearing outer ring 20 to facilitate roundness measurement on its inner cylindrical surface, thereby examining the resulting roundness and eccentricity. The spacer 300 is installed between the bearing outer ring 20 and the bearing housing 100, and the adjusting member 200 rests on the spacer 300 without directly acting on the bearing outer ring 20, thus preventing damage to the bearing outer ring 20.

[0046] See also Figure 1 In one embodiment, the bearing housing 100 includes a support base 120 and a cylindrical portion 110 disposed on the upper part of the support base 120. The shape of the support base 120 is not limited; in specific configurations, it can be as follows: Figure 1 The base plate shown is designed to work with the support plate, and connection holes or other structures are provided on the base plate to facilitate connection with the experimental platform. In one embodiment, the support base 120 has one or more sliding grooves 121, which facilitates the fixing and disassembly of the bearing seat 100 to the experimental platform. Depending on the specific working conditions, a suitable position within the length range of the sliding groove 121 is selected for fixing.

[0047] In one embodiment, the limiting protrusion 112 includes a spacer shoulder protruding from the inner diameter surface 110a of the cylindrical portion. The function of providing the limiting protrusion 112 on the inner diameter surface 110a of the cylindrical portion is that when the other end of the adjusting member 200 presses against the spacer 300, causing deformation of the spacer 300, an axial load is applied to the end face of the bearing outer ring 20. The spacer shoulder serves as the opposite surface to the axial load, thereby restricting the axial movement of the spacer 300. It should be noted that, in addition to being configured as an annular spacer shoulder, the specific structure of the limiting protrusion 112 can also be configured as several limiting protrusions, as long as they can constrain the axial position of the spacer 300.

[0048] Preferably, in one embodiment, the connecting mating hole 111 includes a threaded hole formed in the cylindrical portion, and correspondingly, in this embodiment, the adjusting member 200 includes a set screw that mates with the threaded hole. It should be noted that in this embodiment, the bearing housing 100 is composed of a threaded hole, a limiting protrusion 112, etc., and the set screws are evenly distributed along the circumferential direction. One end of the set screw is fixed to the bearing housing 100, and the thread preload causes the other end of the set screw to press against the spacer 300 to deform it. An axial load is applied to the end face of the bearing outer ring 20, and the axial load is applied to the spacer shoulder provided in the bearing housing 100 to restrict the axial movement of the spacer 300.

[0049] On the other hand, the technical solution provided by the present invention is a method for adjusting the roundness and eccentricity of a bearing assembly housing, comprising:

[0050] Step S100, see Figure 6 Establish finite element models of spacer 300 and bearing outer ring 20, including but not limited to establishing the surface-to-surface contact between the two;

[0051] Step S200, see Figure 7 Finite element simulation was performed by applying a forced displacement load at the node where the outer surface of the spacer 300 contacts the adjusting member 200 to obtain the effect of the feed rate of the adjusting member 200 on the deformation of the spacer 300 and to plot the forced displacement load-bearing outer ring deformation curve; see [link to relevant documentation]. Figures 8-12 The diagram shows the deformation displacement contours of the bearing outer ring corresponding to different displacement loads.

[0052] Step S300: Based on the forced displacement load-bearing outer ring deformation curve, select the adjusting component 200 and determine the corresponding feed amount;

[0053] Step S400: Adjust the corresponding adjusting component 200 according to the feed amount to force the spacer 300 to deform, so as to form different assembly shell roundness and eccentric working conditions.

[0054] It should be noted that the feed rate of the adjusting component 200 is calculated using finite element contact analysis. Taking the adjusting component 200 as an example, a finite element model of the spacer 300 and the outer ring 20 of the bearing is first established. The feed rate of the adjusting component 200 and the deformation of the outer ring of the bearing are calculated by using forced displacement load to recommend a suitable thread feed rate to meet the requirements of different working conditions.

[0055] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] In this invention, unless otherwise explicitly specified and limited, "above" or "below" a second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of a second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

Claims

1. A method for adjusting the roundness and eccentricity of a bearing assembly housing, characterized in that: The device for adjusting the roundness and eccentricity of a bearing assembly housing comprises a bearing seat provided with a cylindrical portion, the cylindrical portion being provided with a plurality of connecting fitting holes arranged along the circumference of the cylindrical portion and penetrating the inner diameter surface and the outer diameter surface of the cylindrical portion, the inner diameter surface being provided with a limiting protrusion; a plurality of adjusting members connected one-to-one with the plurality of connecting fitting holes, the adjusting members being capable of feeding or retreating in the connecting fitting holes; and a spacer sleeve provided on the inner side of the cylindrical portion and stopped on one side of the limiting protrusion, the outer diameter surface of the spacer sleeve abutting against the end of the adjusting member, the inner diameter surface of the spacer sleeve being in close contact with the outer diameter surface of the bearing outer ring, when the adjusting member feeds, the adjusting member forces the spacer sleeve to deform to adjust the bearing outer ring; The method comprises establishing a finite element model of the spacer sleeve and the bearing outer ring, including establishing the face-to-face contact between the two; applying a forced displacement load on the nodes at the contact between the outer surface of the spacer sleeve and the adjusting member; obtaining the influence of the adjusting member feeding amount on the deformation amount of the sleeve ring and drawing a forced displacement load-bearing outer ring deformation amount curve; selecting the adjusting member and determining the corresponding feeding amount according to the forced displacement load-bearing outer ring deformation amount curve; adjusting the corresponding adjusting member according to the feeding amount, forcing the spacer sleeve to deform to form different assembly housing roundness and eccentricity working conditions.

2. The method for adjusting bearing assembly housing roundness and eccentricity of claim 1, wherein: The width of the spacer sleeve is greater than the width of the bearing outer ring.

3. The method for adjusting bearing assembly housing roundness and eccentricity of claim 1, wherein: The plurality of connecting fitting holes are arranged at equal intervals.

4. The method for adjusting bearing assembly housing roundness and eccentricity of claim 1, wherein: The end of the adjusting member abuts against the spacer sleeve, and the abutting axial position corresponds to one-half of the outer diameter surface of the bearing outer ring.

5. The method for adjusting bearing assembly housing roundness and eccentricity of any one of claims 1-4, wherein: The bearing seat comprises a support seat and the cylindrical portion provided on the upper part of the support seat.

6. The method for adjusting bearing assembly housing roundness and eccentricity of claim 5, wherein: One or more than one sliding groove is formed on the support seat.

7. The method for adjusting bearing assembly housing roundness and eccentricity of any one of claims 1-4, wherein: The limiting protrusion comprises a spacer sleeve shoulder protruding from the inner diameter surface of the cylindrical portion.

8. The method for adjusting bearing assembly housing roundness and eccentricity of any one of claims 1-4, wherein: The connecting fitting hole comprises a threaded hole formed in the cylindrical portion.

9. The method for adjusting bearing assembly housing roundness and eccentricity of claim 8, wherein: The adjusting member comprises a jack screw matched with the threaded hole.

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