Testing device for sliding bearing
By designing a sliding bearing test device that includes axial and radial pressure urging components, the sliding bearings are realized to bear both axial and radial loads in the test, solving the problem that existing devices cannot conduct comprehensive performance assessment, and achieving a comprehensive evaluation of the performance of sliding bearings.
Patent Information
- Application Number
- CN202510193908.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-06-27
AI Technical Summary
The existing sliding bearing test devices cannot conduct axial and radial load tests at the same time, making it difficult to achieve comprehensive performance assessment of sliding bearings.
A test device including an axial force application assembly and two radial force application assembly is designed to simulate axial and radial loads through the drive shaft and the test shaft to ensure that the sliding bearing can bear multi-directional loads simultaneously during the test.
This test device can conduct axial and radial load tests at the same time, comprehensively evaluate the performance of sliding bearings, and meet the load test requirements of multi-directional loads.
Smart Images
Figure CN120213460A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of mechanical testing, and particularly to a test device for a sliding bearing. Background Art
[0002] A sliding bearing is an important device in a ship propulsion system. If there is a fault in the sliding bearing, it will cause the ship propulsion system to break down and the ship cannot sail normally. Therefore, before the sliding bearing is used, it often needs to be tested first to determine whether the performance indicators of the sliding bearing meet the design requirements and ensure the reliability of the ship propulsion system.
[0003] The test devices in the related art can only apply axial load or radial load to the sliding bearing alone to detect the single performance of the axial or radial load of the sliding bearing. Therefore, it cannot meet the requirements of the multi-directional load loading test and is difficult to realize the comprehensive performance assessment of the sliding bearing. Summary of the Invention
[0004] An embodiment of the present disclosure provides a test device for a sliding bearing, which can simultaneously perform axial load and radial load tests on the sliding bearing to realize the performance assessment of the sliding bearing. The technical solution is as follows:
[0005] An embodiment of the present disclosure provides a test device for a sliding bearing. The test device includes: a test base, a transmission shaft, a test shaft, an axial force application assembly, and two radial force application assemblies. The two radial force application assemblies and the axial force application assembly are arranged at intervals in sequence along a first direction on the test base; the radial force application assembly includes: a first bearing seat and a first force application member, the first force application member is connected to the first bearing seat, the first force application member is located on the test base, and the first force application member is used to apply a radial acting force to the first bearing seat along a second direction, and the second direction is perpendicular to the first direction; the axial force application assembly includes: a second bearing seat and a second force application member, both the second bearing seat and the second force application member are located on the test base, the second force application member has a force application shaft, and one end of the force application shaft is inserted into the inner hole of the second bearing seat; the first end of the transmission shaft is inserted into the inner hole of the first bearing seat close to the axial force application assembly, the second end of the transmission shaft is coaxially connected to one end of the force application shaft, and the force application shaft is used to apply an axial acting force to the transmission shaft along the first direction; the test shaft is used for sleeving the sliding bearing to be tested, the test shaft is located between the two radial force application assemblies, the first end of the test shaft is coaxially connected to the first end of the transmission shaft, and the second end of the test shaft is inserted into the inner hole of the first bearing seat far from the axial force application assembly.
[0006] In one implementation of the embodiments of the present disclosure, the first bearing housing includes: a top plate, a bottom plate, an inner bearing ring, an outer bearing ring, and at least two tie rods. The first force-applying member is located between the top plate and the bottom plate. One end of the tie rod passes through the top plate and is connected to the first force-applying member, and the other end of the tie rod is connected to the outer bearing ring. The outer bearing ring is sleeved outside the inner bearing ring. The first force-applying member is configured to apply a radial force to the outer bearing ring through the tie rod.
[0007] In another implementation of the embodiments of the present disclosure, the first force-applying member includes at least one of an oil cylinder, a cylinder, and a telescopic rod.
[0008] In another implementation of the embodiments of the present disclosure, the second bearing housing includes: an inner bearing ring and an outer bearing ring. The outer bearing ring is located on the test base, and the outer bearing ring is sleeved outside the inner bearing ring. The second force-applying member includes at least one of an oil cylinder, a cylinder, and a telescopic rod. One end of the telescopic shaft of the second force-applying member is inserted into the inner bearing ring and is coaxially connected to the second end of the transmission shaft.
[0009] In another implementation of the embodiments of the present disclosure, the test device further includes a driving motor and a speed reducer. The rotating shaft of the driving motor is in transmission connection with the input shaft of the speed reducer, and the output shaft of the speed reducer is in transmission connection with the second end of the test shaft.
[0010] In another implementation of the embodiments of the present disclosure, the test device further includes an intermediate bearing housing. The intermediate bearing housing is located on the test base, and the second end of the transmission shaft passes through the intermediate bearing and is coaxially connected to one end of the force-applying shaft.
[0011] In another implementation of the embodiments of the present disclosure, the intermediate bearing housing includes: a bearing base, a bearing top cover, and a support shaft sleeve. The bearing base is detachably connected to the bearing top cover. The bearing base and the bearing top cover are combined to form a cylindrical structure with an inner hole. The support shaft sleeve is movably inserted into the inner hole of the cylindrical structure, and the second end of the transmission shaft is inserted into the support shaft sleeve.
[0012] In another implementation of the embodiments of the present disclosure, at least a part of the outer peripheral wall of the support shaft sleeve is a convex spherical surface, and at least the inner wall surface of the cylindrical structure is a concave spherical surface. The convex spherical surface of the support shaft sleeve is in contact with the concave spherical surface of the cylindrical structure.
[0013] In another implementation manner of the embodiment of the present disclosure, the surface of the bearing top cover has a first oil hole penetrating through to the concave spherical surface, and the convex spherical surface of the support bushing has a second oil hole penetrating through to the inner wall of the support bushing; the central axes of the first oil hole and the second oil hole are both located in the same radial section of the support bushing.
[0014] In another implementation manner of the embodiment of the present disclosure, the convex spherical surface of the support bushing has a first annular counterbore, and the concave spherical surface of the cylindrical structure has a second annular counterbore, and the first annular counterbore is opposite to the second annular counterbore; the bottom of the first annular counterbore has a second oil hole penetrating through to the inner wall of the support bushing.
[0015] The beneficial effects brought by the technical solutions provided by the embodiments of the present disclosure at least include:
[0016] The test device provided by the embodiment of the present disclosure includes two radial force application components and an axial force application component arranged at intervals in sequence along a first direction on a test base. Among them, a first force application member of the radial force application component is connected to a first bearing seat, the first force application member is located on the test base, and the first force application member is used to apply a radial force to the first bearing seat along a second direction. Since the second direction is perpendicular to the first direction, a radial force can be applied to a test shaft inserted in the first bearing seat through the first force application member, so that a sliding bearing sleeved on the test shaft also bears the radial force, thereby realizing the simulation of the radial load and examining the performance of the sliding bearing in bearing the radial force.
[0017] At the same time, the second bearing seat and the second force application member of the axial force application component are both arranged on the test base along the first direction, and one end of the force application shaft of the second force application member is inserted into the inner hole of the second bearing seat, and the force application shaft passes through the second bearing seat and is coaxially connected to a transmission shaft, so that the axial force applied by the force application shaft can be applied to the transmission shaft, and the test shaft is coaxially connected to the transmission shaft, so the axial force will also be transmitted to the sliding bearing through the test shaft, enabling the sliding bearing to also bear the axial force, thereby realizing the simulation of the axial load and examining the performance of the sliding bearing in bearing the axial force. Therefore, the test device provided by the embodiment of the present disclosure can not only conduct an axial load test on the sliding bearing, but also conduct a radial load test, realizing the performance assessment of the sliding bearing. Description of the Drawings
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0019] Figure 1It is a schematic structural diagram of a test device for a sliding bearing provided by an embodiment of the present disclosure;
[0020] Figure 2 It is a front view of a radial force application component provided by an embodiment of the present disclosure;
[0021] Figure 3 It is a side view of a radial force application component provided by an embodiment of the present disclosure;
[0022] Figure 4 It is a schematic structural diagram of an intermediate bearing housing provided by an embodiment of the present disclosure.
[0023] The descriptions of each mark in the figure are as follows:
[0024] 10. Test base;
[0025] 20. Transmission shaft;
[0026] 30. Test shaft;
[0027] 40. Radial force application component;
[0028] 41. First bearing housing; 411. Top plate; 412. Bottom plate; 413. Bearing inner ring; 414. Bearing outer ring; 415. Tie rod; 416. Ear plate;
[0029] 42. First force application member;
[0030] 50. Axial force application component; 51. Second bearing housing; 52. Second force application member; 521. Force application shaft;
[0031] 60. Sliding bearing to be tested;
[0032] 71. Driving motor; 72. Reducer;
[0033] 80. Intermediate bearing housing;
[0034] 81. Bearing base; 811. Collection groove;
[0035] 82. Bearing top cover; 821. First oil hole;
[0036] 83. Support bushing; 831. Outer convex spherical surface; 832. Second oil hole; 833. First annular counterbore;
[0037] 84. End cover; 85. Inner concave spherical surface; 86. Second annular counterbore;
[0038] 1a. First direction; 1b. Second direction. Detailed implementation manners
[0039] To make the objectives, technical solutions, and advantages of the present disclosure clearer, the following will further describe in detail the embodiments of the present disclosure with reference to the accompanying drawings.
[0040] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure pertains. The terms "first", "second", "third", and similar terms used in the specification and claims of the present patent application do not denote any order, quantity, or importance, but are merely used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a limitation in quantity, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" and similar terms are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", "top", "bottom", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly.
[0041] Figure 1 is a schematic structural diagram of a test device for a sliding bearing provided by an embodiment of the present disclosure. As Figure 1 shown, the test device includes: a test base 10, a transmission shaft 20, a test shaft 30, an axial force application assembly 50, and two radial force application assemblies 40. The two radial force application assemblies 40 and the axial force application assembly 50 are arranged at intervals in sequence along a first direction 1a on the test base 10.
[0042] Figure 2 is a front view of a radial force application assembly 40 provided by an embodiment of the present disclosure. Figure 3 is a side view of a radial force application assembly 40 provided by an embodiment of the present disclosure. As Figure 2 、 3 shown, the radial force application assembly 40 includes: a first bearing seat 41 and a first force application member 42. The first force application member 42 is connected to the first bearing seat 41, and the first bearing seat 41 is located on the test base 10. The first force application member 42 is installed on the test base 10 through the first bearing seat 41.
[0043] Among them, the first force application member 42 is used to apply a radial force to the first bearing seat 41 along a second direction 1b, and the second direction 1b is perpendicular to the first direction 1a.
[0044] As Figure 1As shown in the figure, the axial force application component 50 includes: a second bearing seat 51 and a second force application member 52. Both the second bearing seat 51 and the second force application member 52 are located on the test base 10. The second force application member 52 has a force application shaft 521, and one end of the force application shaft 521 is inserted into the inner hole of the second bearing seat 51.
[0045] As Figure 1 shown in the figure, the first end of the transmission shaft 20 is inserted into the inner hole of the first bearing seat 41 near the axial force application component 50, and the second end of the transmission shaft 20 is coaxially connected to one end of the force application shaft 521.
[0046] Among them, the force application shaft 521 is used to apply an axial force to the transmission shaft 20 along the first direction 1a.
[0047] As Figure 1 shown in the figure, the test shaft 30 is used for the sleeve of the sliding bearing 60 to be measured. The test shaft 30 is located between two radial force application components 40. The first end of the test shaft 30 is coaxially connected to the first end of the transmission shaft 20, and the second end of the test shaft 30 is inserted into the inner hole of the first bearing seat 41 far from the axial force application component 50.
[0048] The test device provided by the embodiment of the present disclosure includes two radial force application components 40 and an axial force application component 50 arranged at intervals along the first direction 1a on the test base 10. Among them, the first force application member 42 of the radial force application component 40 is connected to the first bearing seat 41. The first bearing seat 41 is located on the test base 10. The first force application member 42 is used to apply a radial force to the first bearing seat 41 along the second direction 1b. Since the second direction 1b is perpendicular to the first direction 1a, a radial force can be applied to the test shaft 30 inserted into the first bearing seat 41 through the first force application member 42, so that the sliding bearing sleeved on the test shaft 30 also bears the radial force, thereby realizing the simulation of the radial load and examining the performance of the sliding bearing under the radial force.
[0049] At the same time, the second bearing seat 51 and the second force application member 52 of the axial force application component 50 are both arranged on the test base 10 along the first direction 1a, and one end of the force application shaft 521 of the second force application member is inserted into the inner hole of the second bearing seat 51. The force application shaft 521 passes through the second bearing seat 51 and is coaxially connected to the transmission shaft 20, so that the axial force applied by the force application shaft 521 can be applied to the transmission shaft 20. And the test shaft 30 is coaxially connected to the transmission shaft 20. Therefore, the axial force will also be transmitted to the sliding bearing through the test shaft 30, so that the sliding bearing also bears the axial force, thereby realizing the simulation of the axial load and examining the performance of the sliding bearing under the axial force. Therefore, the test device provided by the embodiment of the present disclosure can not only perform the axial load test on the sliding bearing, but also perform the radial load test, realizing the performance assessment of the sliding bearing.
[0050] Exemplarily, as Figure 1 shown, the test base 10 may include two parallel and spaced mounting plates and a connecting plate connected between the two mounting plates to form a hollow frame structure. The frame structure can not only reduce the use of plates and achieve a lightweight design, but also has good stability, providing a stable mounting foundation for the axial force application component 50 and the radial force application component 40.
[0051] Exemplarily, the connecting plate and the mounting plate may be fixed by welding or bolts.
[0052] Wherein, reinforcing ribs may also be provided between the connecting plate and the mounting plate to improve the connection reliability between the connecting plate and the mounting plate.
[0053] Optionally, a coupling may be used to connect the transmission shaft 20 and the force application shaft 521 so that the transmission shaft 20 and the force application shaft 521 are axially locked. In this way, when the force application shaft 521 applies an axial force, the transmission shaft 20 can be pushed or pulled.
[0054] Exemplarily, as Figure 1 shown, connecting flanges may be provided at the ends where the transmission shaft 20 and the force application shaft 521 are connected. After the connecting flanges of the transmission shaft 20 and the force application shaft 521 are butted, the two connecting flanges are locked with bolts and nuts, and the transmission shaft 20 and the force application shaft 521 can be axially locked.
[0055] Optionally, a coupling may be used to connect the first end of the test shaft 30 and the first end of the transmission shaft 20 so that the test shaft 30 and the transmission shaft 20 are axially locked. In this way, when the force application shaft 521 applies an axial force, it can be transmitted to the test shaft 30 through the transmission shaft 20, thereby applying an axial load to the sliding bearing.
[0056] Exemplarily, as Figure 1 shown, connecting flanges may be provided at the ends where the test shaft 30 and the transmission shaft 20 are connected. After the connecting flanges of the test shaft 30 and the transmission shaft 20 are butted, the two connecting flanges are locked with bolts and nuts, and the test shaft 30 and the transmission shaft 20 can be axially locked.
[0057] Optionally, as Figure 1 shown, the test device further includes a driving motor 71 and a speed reducer 72. The rotating shaft of the driving motor 71 is in transmission connection with the input shaft of the speed reducer 72, and the output shaft of the speed reducer 72 is in transmission connection with the second end of the test shaft 30.
[0058] In this way, by driving the output shaft of the speed reducer 72 to rotate through the driving motor 71, the speed reducer 72 can drive the test shaft 30 to rotate to drive the sliding bearing to rotate, thereby simulating the normal working state of the sliding bearing and improving the accuracy of the load test.
[0059] Exemplarily, as Figure 1 shown, the output shaft of the speed reducer 72 is inserted into the inner hole of the first bearing housing 41 that is far from the axial force application assembly 50, and the output shaft of the speed reducer 72 passes through the inner hole of the first bearing housing 41 and is coaxially connected to the second end of the test shaft 30.
[0060] Among them, the second end of the test shaft 30 and the output shaft of the speed reducer 72 can be connected by a coupling so that the test shaft 30 and the output shaft of the speed reducer 72 are axially locked and circumferentially locked. In this way, the torque output by the output shaft of the speed reducer 72 can be transmitted to the test shaft 30, thereby rotating the sliding bearing.
[0061] Exemplarily, as Figure 1 shown, connecting flanges can be provided at the ends where the test shaft 30 and the output shaft of the speed reducer 72 are connected. After the connecting flanges of the test shaft 30 and the output shaft of the speed reducer 72 are butted, the two connecting flanges are locked with bolts and nuts, and the test shaft 30 and the output shaft of the speed reducer 72 can be axially locked and circumferentially locked.
[0062] Optionally, as Figure 1 shown, the test device further includes a mounting base, and the drive motor 71 and the speed reducer are both located on the mounting base. By providing the mounting base, the drive motor 71 and the speed reducer can be elevated, so that the output shaft of the speed reducer can be coaxial with the inner hole of the first bearing housing 41, and the output shaft of the speed reducer can be more easily inserted into the inner hole of the first bearing housing 41.
[0063] Exemplarily, the mounting base can include two parallel and spaced mounting plates and a connecting plate connected between the two mounting plates to form a hollow frame structure. The frame structure can not only reduce the use of plates and achieve a lightweight design, but also has good stability, providing a stable mounting foundation for the drive motor 71 and the speed reducer 72.
[0064] Exemplarily, the connecting plate and the mounting plate can be fixed by welding or bolts.
[0065] Among them, reinforcing ribs can also be provided between the connecting plate and the mounting plate to improve the connection reliability between the connecting plate and the mounting plate.
[0066] Optionally, as Figure 2 、 3As shown, the first bearing housing 41 includes: a top plate 411, a bottom plate 412, an inner bearing ring 413, an outer bearing ring 414, and at least two tie rods 415. A first force - applying member 42 is located between the top plate 411 and the bottom plate 412. One end of the tie rod 415 passes through the top plate 411 and is connected to the first force - applying member 42, and the other end of the tie rod 415 is connected to the outer bearing ring 414. The outer bearing ring 414 is sleeved outside the inner bearing ring 413. The first force - applying member 42 is used to apply a radial force to the outer bearing ring 414 through the tie rod 415.
[0067] Exemplarily, as Figure 2 , 3 shown, the bottom plate 412 is connected to the test base 10, and the bottom plate 412 can be fixed to the test base 10 by bolts and nuts to realize the disassembly and replacement of the first bearing housing 41.
[0068] Exemplarily, the other end of the tie rod 415 is stepped, and the outer peripheral wall of the outer bearing ring 414 is provided with an ear plate 416. The ear plate 416 is provided with a through - hole sleeved on the end of the tie rod 415, and the plate surface of the ear plate 416 abuts against the stepped shoulder, so as to prevent the ear plate 416 from slipping to the bottom of the tie rod 415 after being sleeved on the end of the tie rod 415.
[0069] Wherein, the other end of the tie rod 415 is provided with an external thread, so that after the ear plate 416 is sleeved on the tie rod 415, it can be locked on the tie rod 415 by a nut to prevent the outer bearing ring 414 from falling off the tie rod 415.
[0070] In the above implementation manner, the inner bearing ring 413 and the outer axial ring can rotate relative to each other, so that the test shaft 30 inserted in the inner bearing ring 413 can rotate freely relative to the outer bearing ring 414.
[0071] Optionally, the first force - applying member 42 includes at least one of an oil cylinder, a cylinder, and a telescopic rod.
[0072] Exemplarily, the first force - applying member 42 is an oil cylinder. The cylinder barrel of the oil cylinder is connected to the bottom plate 412, and the piston rod of the oil cylinder is connected to the tie rod 415. In this way, when the oil cylinder expands and contracts, it can push or pull the tie rod 415, and thus push or pull the inner bearing ring 413 and the outer bearing ring 414 by means of the tie rod 415 to apply a radial force to the sliding bearing.
[0073] Optionally, the second bearing housing includes: an inner bearing ring 413 and an outer bearing ring 414. The outer bearing ring 414 is located on the test base 10, and the outer bearing ring 414 is sleeved outside the inner bearing ring 413.
[0074] Wherein, the inner bearing ring 413 and the outer axial ring can rotate relative to each other, so that the force - applying shaft 521 inserted in the inner bearing ring 413 can rotate freely relative to the outer bearing ring 414.
[0075] Exemplarily, the second force applying member includes at least one of an oil cylinder, a pneumatic cylinder, and a telescopic rod. One end of the telescopic shaft of the second force applying member is inserted into the inner ring 413 of the bearing and is coaxially connected to the second end of the transmission shaft 20.
[0076] For example, the second force applying member is an oil cylinder. The cylinder barrel of the oil cylinder is connected to the test base 10 through a bracket, and the piston rod of the oil cylinder is inserted into the inner ring 413 of the bearing of the second bearing seat. When the oil cylinder expands and contracts, it can push or pull the transmission shaft 20, thereby pushing or pulling the test shaft 30 by means of the transmission shaft 20 to apply an axial force to the sliding bearing.
[0077] Optionally, as Figure 1 shown, the test device further includes an intermediate bearing seat 80. The intermediate bearing seat 80 is located on the test base 10, and the second end of the transmission shaft 20 passes through the intermediate bearing and is coaxially connected to one end of the force applying shaft 521.
[0078] Since a transmission shaft 20 for transitional connection is further provided between the force applying shaft 521 of the second force applying member and the test shaft 30, by providing the intermediate bearing seat 80 to support the transmission shaft 20, it is possible to prevent all the gravity of the transmission shaft 20 from being borne by the first bearing seat 41 and the second bearing seat, thereby improving the reliability of the test device.
[0079] Figure 4 is a schematic structural diagram of an intermediate bearing seat 80 provided by an embodiment of the present disclosure. As Figure 4 shown, the intermediate bearing seat 80 includes: a bearing base 81, a bearing top cover 82, and a support bushing 83. The bearing base 81 is detachably connected to the bearing top cover 82. The bearing base 81 and the bearing top cover 82 are combined to form a cylindrical structure with an inner hole. The support bushing 83 is movably inserted into the inner hole of the cylindrical structure, and the second end of the transmission shaft 20 is inserted into the support bushing 83.
[0080] Exemplarily, as Figure 4 shown, the bearing base 81 and the bearing top cover 82 are combined to form a cylinder, and end caps 84 are provided at both ends of the cylinder. The end caps 84 can be fixed to the bearing base 81 through bolts sequentially passing through the end caps 84 and the bearing base 81, or the end caps 84 can be fixed to the bearing top cover 82 through bolts sequentially passing through the end caps 84 and the bearing top cover 82.
[0081] In the above implementation manner, the support bushing 83 can rotate freely in the inner hole of the cylindrical structure, so that the transmission shaft 20 inserted into the support bushing 83 can rotate freely relative to the cylindrical structure.
[0082] Optionally, as Figure 4As shown, at least a part of the outer peripheral wall of the support bushing 83 is an outwardly convex spherical surface 831, and at least the inner wall surface of the cylindrical structure is an inwardly concave spherical surface 85. The outwardly convex spherical surface 831 of the support bushing 83 is in contact with the inwardly concave spherical surface 85 of the cylindrical structure.
[0083] At least the inner wall surface of the cylindrical structure is an inwardly concave spherical surface 85, so that the outwardly convex spherical surface 831 of the support bushing 83 can be embedded in the inwardly concave spherical surface 85, so that the support bushing 83 will not axially slide relative to the cylindrical structure, that is, axially lock the support bushing 83.
[0084] Optionally, as Figure 4 shown, the surface of the bearing top cover 82 has a first oil hole 821 that penetrates to the inwardly concave spherical surface 85, and the outwardly convex spherical surface 831 of the support bushing 83 has a second oil hole 832 that penetrates to the inner wall of the support bushing 83.
[0085] As Figure 4 shown, the central axes of the first oil hole 821 and the second oil hole 832 are both located in the same radial cross-section of the support bushing 83. That is, when the second oil hole 832 of the support bushing 83 rotates to face the first oil hole 821, the first oil hole 821 and the second oil hole 832 are communicated. Among them, an oil cup is provided at one end of the first oil hole 821 on the surface of the bearing top cover 82, so that the lubricating oil can be injected into the gap between the transmission shaft 20 and the inner wall of the support bushing 83 through the first oil hole 821 and the second oil hole 832 in sequence, so as to fully lubricate the transmission shaft 20 and avoid easy wear of the transmission shaft 20.
[0086] Optionally, as Figure 4 shown, the outwardly convex spherical surface 831 of the support bushing 83 has a first annular counterbore 833, and the inwardly concave spherical surface 85 of the cylindrical structure has a second annular counterbore 86. The first annular counterbore 833 is opposite to the second annular counterbore 86. The bottom of the first annular counterbore 833 has a second oil hole 832 that penetrates to the inner wall of the support bushing 83.
[0087] In the above implementation, after the gap between the transmission shaft 20 and the inner wall of the support bushing 83 is filled with lubricating oil, the lubricating oil will enter the oil collecting groove 811 surrounded by the first annular counterbore 833 and the second annular counterbore 86 along the second oil hole 832. When the oil collecting groove 811 overflows, the lubricating oil enters the gap between the outwardly convex spherical surface 831 and the inwardly concave spherical surface 85 to form an oil film between the outwardly convex spherical surface 831 and the inwardly concave spherical surface 85, preventing the outwardly convex spherical surface 831 and the inwardly concave spherical surface 85 from being easily worn.
[0088] Optionally, as Figure 4As shown, a collecting groove 811 is provided on the inner wall surface of the bearing base 81 except for the concave spherical surface 85. After the lubricating oil fills the gap between the convex spherical surface 831 and the concave spherical surface 85, the lubricating oil will overflow to both sides of the concave spherical surface 85 and thus flow into the collecting groove 811.
[0089] Exemplarily, there is also a collecting hole on the surface of the bearing base 81 that penetrates through to the collecting groove 811. When the lubricating oil overflows from the collecting groove 811, the lubricating oil will be discharged from the bearing base 81 through the collecting hole.
[0090] The above is not any form of limitation to the present disclosure. Although the present disclosure has been disclosed as above through embodiments, it is not intended to limit the present disclosure. Any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes by using the above-disclosed technical content without departing from the scope of the technical solution of the present disclosure. However, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present disclosure without departing from the content of the technical solution of the present disclosure still fall within the scope of the technical solution of the present disclosure.
Claims
1. A test device for sliding bearings, characterized in that: The test device comprises: a test base (10), a transmission shaft (20), a test shaft (30), an axial force application assembly (50) and two radial force application assemblies (40); the two radial force application assemblies (40) and the axial force application assembly (50) are sequentially arranged on the test base (10) at intervals along a first direction (1a); The radial force-applying assembly (40) comprises: a first bearing seat (41) and a first force-applying member (42), wherein the first force-applying member (42) is connected to the first bearing seat (41), the first force-applying member (42) is located on the test base (10), and the first force-applying member (42) is used to apply a radial force to the first bearing seat (41) along a second direction (1b), wherein the second direction (1b) is perpendicular to the first direction (1a); The axial force-applying assembly (50) comprises: a second bearing seat (51) and a second force-applying member (52), wherein the second bearing seat (51) and the second force-applying member (52) are both located on the test base (10), and the second force-applying member (52) has a force-applying shaft (521), and one end of the force-applying shaft (521) is inserted into the inner hole of the second bearing seat (51); The first end of the transmission shaft (20) is inserted into the inner hole of the first bearing seat (41) close to the axial force application component (50), the second end of the transmission shaft (20) is coaxially connected to one end of the force application shaft (521), and the force application shaft (521) is used to apply an axial force to the transmission shaft (20) along the first direction (1a); The test shaft (30) is used for fitting the sliding bearing (60) to be tested, the test shaft (30) is located between the two radial force-applying components (40), the first end of the test shaft (30) is coaxially connected to the first end of the transmission shaft (20), and the second end of the test shaft (30) is inserted into the inner hole of the first bearing seat (41) away from the axial force-applying component (50).
2. The test device according to claim 1, characterized in that: The first bearing seat (41) includes: a top plate (411), a bottom plate (412), a bearing inner ring (413), a bearing outer ring (414) and at least two tie rods (415), the first force-applying member (42) is located between the top plate (411) and the bottom plate (412), one end of the tie rod (415) passes through the top plate (411) and is connected to the first force-applying member (42), the other end of the tie rod (415) is connected to the bearing outer ring (414), the bearing outer ring (414) is sleeved outside the bearing inner ring (413), and the first force-applying member (42) is used to apply a radial force to the bearing outer ring (414) through the tie rod (415).
3. The test device according to claim 2, characterized in that: The first force applying member (42) comprises at least one of an oil cylinder, an air cylinder and a telescopic rod.
4. The test device according to claim 1, characterized in that: The second bearing seat comprises: a bearing inner ring and a bearing outer ring, wherein the bearing outer ring is located on the test base, and the bearing outer ring is sleeved outside the bearing inner ring; The second force-applying member includes at least one of an oil cylinder, an air cylinder and a telescopic rod. One end of the telescopic shaft of the second force-applying member is inserted into the inner ring of the bearing and is coaxially connected to the second end of the transmission shaft.
5. The test device according to claim 1, characterized in that: The test device further comprises a driving motor (71) and a reducer (72); the rotating shaft of the driving motor (71) is drivingly connected to the input shaft of the reducer (72); and the output shaft of the reducer (72) is drivingly connected to the second end of the test shaft (30).
6. The test device according to any one of claims 1 to 5, characterized in that: The test device also includes an intermediate bearing seat (80), wherein the intermediate bearing seat (80) is located on the test base (10), and the second end of the transmission shaft (20) passes through the intermediate bearing and is coaxially connected to one end of the force application shaft (521).
7. The test device according to claim 6, characterized in that The intermediate bearing seat (80) comprises: a bearing base (81), a bearing top cover (82) and a support sleeve (83); the bearing base (81) and the bearing top cover (82) are detachably connected; the bearing base (81) and the bearing top cover (82) are combined to form a cylindrical structure with an inner hole; the support sleeve (83) is movably inserted in the inner hole of the cylindrical structure; and the second end of the transmission shaft (20) is inserted in the support sleeve (83).
8. The test device according to claim 7, characterized in that: At least part of the outer peripheral wall of the support sleeve (83) is an outer convex spherical surface (831), and at least the inner wall surface of the cylindrical structure is an inner concave spherical surface (85). The outer convex spherical surface (831) of the support sleeve (83) fits with the inner concave spherical surface (85) of the cylindrical structure.
9. The test device according to claim 8, characterized in that The surface of the bearing top cover (82) has a first oil hole (821) penetrating to the inner concave spherical surface (85), and the outer convex spherical surface (831) of the support sleeve (83) has a second oil hole (832) penetrating to the inner wall of the support sleeve (83); The central axis of the first oil hole (821) and the central axis of the second oil hole (832) are both located in the same radial cross section of the support sleeve (83).
10. The test device according to claim 9, characterized in that The outer convex spherical surface (831) of the support sleeve (83) has a first annular countersunk hole (833), and the inner concave spherical surface (85) of the cylindrical structure has a second annular countersunk hole (86), and the first annular countersunk hole (833) is opposite to the second annular countersunk hole (86); The bottom of the first annular counterbore (833) has a second oil hole (832) penetrating to the inner wall of the support sleeve (83).