Axial loading and lubricating device for ring under lubricated bearing test

Abstract

The application relates to the technical field of bearing testing devices, in particular to an axial loading and lubricating device for ring-lubricated bearing testing, which comprises a fixed support seat, an oil cylinder barrel assembly, a test shaft assembly, a test bearing group, a force guiding cover and a loading cover. The oil cylinder barrel assembly is fixedly installed on the fixed support seat, and the test shaft assembly is arranged outside the fixed support seat. The test bearing group is installed on the test shaft assembly through an inner ring of the bearing, and the test bearing group is installed on a test bearing seat through an outer ring of the bearing. The application can generate stable and accurate axial loading on the test bearing group. Meanwhile, circumferential oil injection holes are uniformly distributed along the outer circumferential surface of the test shaft body, so that the lubricating oil can reach multiple positions in the circumferential direction of the test bearing group at the same time, the lubrication is uniform, and the effect is good.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearing test device, in particular to an axial loading and lubricating device for ring-lubricated bearing test. BACKGROUND

[0002] For the ring-lubricated bearing, the lubricating oil enters the bearing lubricating area from the oil inlet hole of the bearing inner ring. Generally, under the action of centrifugal force, the lubricating oil is more easily to reach the bearing lubricating area. In general, for the high-speed bearing with axial loading requirement, the bearing inner ring rotates at high speed with the test shaft, one end of the test shaft needs to be connected to the driving device, and the other end needs to be installed with the axial loading device. In this case, the ring-lubrication is generally achieved by opening an oil injection groove on the test shaft to spray lubricating oil into the oil injection groove on the test shaft to lubricate the bearing lubricating area. However, in the specific test process, part of the lubricating oil will splash to other places, and the amount of lubricating oil entering the bearing will be greatly reduced. In view of this situation, the present application provides an axial loading and lubricating device which can not only meet the axial loading test requirement of the bearing, but also ensure the lubricating requirement of the ring-lubricated bearing. SUMMARY

[0003] The purpose of the present application is to provide an axial loading and lubricating device for ring-lubricated bearing test, which has a scientific overall structure, is simple and convenient to install and use, and can not only meet the axial loading test requirement of the bearing, but also ensure the lubricating requirement of the ring-lubricated bearing, greatly meeting the test use requirement of the ring-lubricated bearing test.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0005] An axial loading and lubricating device for ring-lubricated bearing test, comprising a fixed support seat, an oil cylinder barrel assembly, a test shaft assembly, a test bearing group, a force guiding cover and a loading cover. The oil cylinder barrel assembly is fixedly installed on the fixed support seat, and the test shaft assembly is arranged outside the fixed support seat. The test bearing group is installed on the test shaft assembly through the bearing inner ring, and is installed on the test bearing seat through the bearing outer ring. One side of the force guiding cover is sleeved on the working end of the oil cylinder barrel assembly, and the right end surface of the force guiding cover is abutted against the loading cover after passing through the inner hole of the fixed support seat. The loading cover is installed on the test bearing seat, and the right end surface of the loading cover is abutted against the left end surface of the test bearing group.

[0006] The oil cylinder assembly comprises an oil cylinder cover, an oil cylinder body, an exhaust valve and a piston rod, the oil cylinder body is provided with a cavity, the piston rod is installed in the cavity and can slide transversely in the cavity, the oil cylinder cover is fixedly installed on the left end surface of the oil cylinder body, an oil-resistant rubber pad is installed between the oil cylinder cover and the oil cylinder body to form a sealed space therebetween, and the exhaust valve is installed on the upper portion of the oil cylinder cover; and an A port for injecting hydraulic oil is formed in the center of the oil cylinder cover.

[0007] Further, a lubricating oil passing channel is formed in the piston rod, an oil injection rod is installed on the outer end of the piston rod, the oil injection rod has a tubular structure with an open end and a closed end, the open end of the oil injection rod is communicated with the lubricating oil passing channel on the piston rod, and oil injection holes are formed in the outer circumferential surface of the oil injection rod.

[0008] The test shaft assembly comprises test shaft bearings I, test shaft bearings II and a test shaft body, a shaft end gland is installed on the leftmost end of the test shaft body, and the right end surface of the shaft end gland is in abutment with the left end surface of the test shaft bearing set; the test shaft bearings II are installed on the right end of the test shaft body, and the test shaft bearings I are installed on the test shaft body and located between the test shaft bearing set and the test shaft bearings II.

[0009] Further, a hollow inner hole is formed in the left side of the test shaft body, and a circumferential oil injection hole is formed in the radial direction of the hollow inner hole, the right end of the oil injection rod extends into the hollow inner hole on the test shaft body and sprays lubricating oil into the circumferential oil injection hole corresponding to the test shaft bearing set on the test shaft.

[0010] Further, the circumferential oil injection holes are uniformly distributed along the outer circumferential surface of the test shaft body, thereby ensuring that the lubricating oil can reach multiple positions in the circumferential direction of the test shaft bearing set at the same time, and the lubrication is uniform and effective.

[0011] Further, a B port for entering lubricating oil is formed in the bottom of the oil cylinder body, and the B port is communicated with the lubricating oil passing channel formed on the piston rod.

[0012] Further, in order to ensure that the axial loading does not produce eccentric loading during the test, the center lines of the oil cylinder assembly, the piston rod, the force guiding cover and the fixed support seat must be ensured to be on the same axis, and the right end surface of the force guiding cover must be perpendicular to the axis.

[0013] The axial loading and lubricating device has the following technical features and advantages compared with the existing ring-lubricated bearing test device:

[0014] 1. The simple structure; compared with the existing under-ring lubrication bearing test device, the number of components is reduced, and the axial loading and lubrication functions can be realized at the same time with the minimum number of components in specific use;

[0015] 2. Precise loading force transmission and good bearing lubrication effect; the axial loading and lubrication device in the application can generate stable and precise axial loading on the test bearing group through the cooperation of the oil cylinder barrel assembly, the force guiding cover and the loading cover and other structural elements, and at the same time, the circumferential oil injection holes are evenly distributed along the outer circumferential surface of the test shaft body, thereby ensuring that the lubricating oil can reach multiple positions in the circumferential direction of the test bearing group at the same time, and the lubrication is uniform and effective;

[0016] 3. Easy to disassemble and assemble, and high practicality; the overall design of the axial loading and lubrication device of the application is simple, and it is very easy to disassemble and assemble during operation and use, and has good practicality. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the installation assembly structure diagram of the axial loading and lubrication device of the application;

[0018] Figure 2 is the structure diagram of the oil cylinder barrel assembly in the application;

[0019] Figure 3 is the structure diagram of the test shaft assembly in the application;

[0020] Figure 4 is the structure diagram of the oil injection rod in the application;

[0021] The figure mark is: 1-oil cylinder cover, 2-exhaust valve, 3-oil-resistant rubber pad, 4-piston rod, 41-lubricating oil oil passage, 5-oil cylinder barrel, 6-fixed support seat, 7-force guiding cover, 8-oil injection rod, 81-oil injection small hole, 9-shaft end gland, 10-loading cover, 11-test bearing seat, 12-test bearing group, 13-oil separation plug, 14-accompanied test bearing I, 15-test shaft body, 16-accompanied test bearing II, 17-circumferential oil injection hole. DETAILED DESCRIPTION

[0022] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application. It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the terms "first", "second" are only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified. The meaning of "several" is one or more, unless otherwise explicitly specified. In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] Specific embodiment 1: As described in the specification attached Figure 1As shown, the axial loading and lubricating device for ring-down lubricated bearing test provided by the present application comprises a fixed support seat 6 installed as a connecting device installation base, an oil cylinder barrel assembly, a test shaft assembly, a test bearing set 12, a force guide cover 7 and a loading cover 10. The oil cylinder barrel assembly is mainly used for providing axial loading. The right side of the oil cylinder barrel assembly is fixedly installed on the fixed support seat 6. The test shaft assembly is arranged outside the fixed support seat 6. The test shaft assembly is used to drive the test bearing set 12 to rotate at high speed. When installed, the test bearing set 12 is installed on the test shaft assembly through the inner ring of the bearing, and the test bearing set 12 is installed on the test bearing seat 11 through the outer ring of the bearing. The force guide cover 7 is sleeved on the outer end of the piston rod 4 in the oil cylinder barrel assembly on one side. After the force guide cover 7 passes through the inner hole on the fixed support seat 6, the right end surface of the force guide cover 7 is abutted against the loading cover 10. The loading cover 10 is installed on the test bearing seat 11. The right end surface of the loading cover 10 is abutted against the left end surface of the test bearing set 12 to axially load the test bearing set 12.

[0024] As shown in the specification Figure 2 As shown, the oil cylinder barrel assembly in the present application comprises an oil cylinder cover 1, an oil cylinder barrel body 5, an exhaust valve 2 and a piston rod 4. A cavity is processed in the oil cylinder barrel body 5 to adapt to the installation of the piston rod 4. The piston rod 4 is installed in the cavity and can slide transversely in the cavity. The oil cylinder cover 1 is fixedly installed on the left end surface of the oil cylinder barrel body 5. An oil-resistant rubber pad 3 is installed between the oil cylinder cover 1 and the oil cylinder barrel body 5 to form a sealed space between the oil cylinder cover 1 and the oil cylinder barrel body 5 to prevent hydraulic oil from overflowing. The exhaust valve 2 is installed on the upper part of the oil cylinder cover 1 to exhaust the sealed space formed between the oil cylinder cover 1 and the oil cylinder barrel body 5. An A port for injecting hydraulic oil is processed at the center of the oil cylinder cover 1. A lubricating oil passing channel 41 is processed on the piston rod 4. An oil injection rod 8 is installed on the outer end of the piston rod 4. The oil injection rod 8 is a tubular structure with one open end and one closed end. When installed, the open end of the oil injection rod 8 is communicated with the lubricating oil passing channel 41 on the piston rod 4. Oil injection small holes 81 (as shown in the specification Figure 4 A B port for injecting lubricating oil is processed at the bottom of the oil cylinder barrel body 5. The B port can be communicated with the lubricating oil passing channel 41 on the piston rod 4.

[0025] As shown in the specification Figure 3As shown, the test shaft assembly in the application includes, test bearing I 14, test bearing II 16 and test shaft body 15, wherein the shaft end gland 9 is installed at the leftmost end of the test shaft body 15, and the right end surface of the shaft end gland 9 is in abutment with the left end surface of the test bearing set 12 to limit the left side of the test bearing set 12; the test bearing I 14 and the test bearing II 16 are installed on the test shaft body 15 to bear, the test bearing II 16 is installed on the right end of the test shaft body 15, and the test bearing I 14 is installed on the test shaft body 15 and located between the test bearing set 12 and the test shaft II; a hollow inner hole cavity is formed on the left side of the test shaft body 15, a circumferential oil injection hole 17 for injecting lubricating oil is formed on the radial direction of the hollow inner hole cavity, the right side end of the oil injection rod 8 extends into the hollow inner hole cavity on the test shaft body 15, and the lubricating oil is thrown into the circumferential oil injection hole 17 on the test shaft corresponding to the test bearing set 12. The circumferential oil injection hole 17 is uniformly distributed along the outer circumferential surface of the test shaft body 15, so as to ensure that the lubricating oil can reach multiple positions in the circumferential direction of the test bearing set 12 at the same time, the lubrication is uniform, the effect is good, and it needs to be noted that the length of the oil injection rod 8 should be longer than the installation position of the test bearing set 12 on the test shaft 15 to ensure that the lubrication can fully lubricate the test bearing set 12, and at the same time, in order to prevent oil leakage, the oil separation plug 13 is inserted into the test shaft 15.

[0026] The test process of the axial loading and lubricating device of the application in the specific operation test is as follows: first, it needs to be pointed out that in the test process, in order to ensure that the axial loading will not produce eccentric load, therefore, the center lines of the oil cylinder barrel 5, the piston rod 4, the force guiding cover 7 and the fixed support seat 6 must be ensured on the same axis, and the right end surface of the force guiding cover 7 must be perpendicular to the axis. In order to ensure the lubrication effect of the test bearing set 12, the structure, size, volume of the inner hole cavity of the test shaft body 15 and the size of the oil injection hole on the shaft need to be designed and calculated according to the requirements, so as to minimize the loss of lubricating oil and achieve the best lubrication effect.

[0027] Axial loading stage; during the test, high-pressure hydraulic oil can be injected from the A port at the center of the oil cylinder cover 1, the gas carried in the hydraulic oil can be discharged through the exhaust valve 2, at this time, the high-pressure thrust between the oil cylinder cover 1 and the oil-resistant rubber pad 3 pushes the piston rod 4 to move horizontally, the piston rod 4 pushes the force guiding cover 7, the force guiding cover 7 pushes the loading cover 10, and then the axial load is applied to the test bearing set 12. A high-precision pressure sensor is installed on the hydraulic oil circuit, the real-time signal of the pressure sensor is transmitted to the electric control system, the electric control system compares the signal with the set load and adjusts the hydraulic oil pressure, and the size of the axial load is determined by the product of the oil pressure and the area of the oil cylinder barrel.

[0028] Lubricating oil filling stage; test lubricating oil is injected from B port at the lower side of the cylinder barrel 5, flows into the oil injection rod 8 along the inner hole (lubricating oil oil passage 41) of the piston rod 4, and then is sprayed into the inner hole cavity of the test shaft body 15 from the small holes on the outer circumferential surface of the oil injection rod 8. The test shaft body 15 rotates at high speed, and the lubricating oil is thrown into the circumferential oil injection hole 17 of the test shaft body 15 corresponding to the test bearing set 12. The oil injection hole is uniformly distributed along the circumference of the test shaft, which ensures that the lubricating oil can reach multiple (each) positions in the circumferential direction of the test bearing set 12 at the same time, and the lubrication is uniform and good.

[0029] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. An axial loading and lubrication device for testing under-ring lubricated bearings, characterized in that, The assembly includes a fixed support base (6), a cylinder assembly, a test shaft assembly, a test bearing assembly (12), a force guide cover (7), and a loading cover (10). The cylinder assembly is fixedly installed on the fixed support base (6). The test shaft assembly is arranged on the outside of the fixed support base (6). The test bearing assembly (12) is installed on the test shaft assembly through the inner ring of the bearing and on the test bearing seat (11) through the outer ring of the bearing. One side of the force guide cover (7) is fitted onto the working end of the cylinder assembly. After the force guide cover (7) passes through the inner hole of the fixed support base (6), its right end face rests on the loading cover (10). The loading cover (10) is installed on the test bearing seat (11), and its right end face rests on the left end face of the test bearing assembly (12). The test shaft assembly includes a test bearing I (14), a test bearing II (16), and a test shaft body (15). A shaft end cap (9) is installed at the leftmost end of the test shaft body (15), and the right end face of the shaft end cap (9) rests against the left end face of the test bearing assembly (12). The test bearing II (16) is installed at the right end of the test shaft body (15), and the test bearing I (14) is installed on the test shaft body (15) and located between the test bearing assembly (12) and the test bearing II (16). A hollow inner hole is provided on the left side of the test shaft body (15), and a circumferential oil injection hole (17) is machined radially in the hollow inner hole. The right end of the oil injection rod (8) extends into the hollow inner hole on the test shaft body (15) and throws the lubricating oil into the circumferential oil injection hole on the test shaft corresponding to the test bearing assembly (12). The circumferential oil injection holes (17) are evenly distributed along the outer circumferential surface of the test shaft body (15), thereby ensuring that the lubricating oil can reach all positions in the circumferential direction of the test bearing assembly (12) at the same time, resulting in uniform lubrication and good effect. The length of the oil injection rod (8) should be longer than the installation position of the test bearing assembly (12) on the test shaft body (15) to ensure that the lubrication can fully lubricate the test bearing assembly (12). At the same time, in order to prevent oil leakage, an oil separator plug (13) is inserted into the test shaft body (15).

2. The axial loading and lubrication device for testing under-ring lubricated bearings according to claim 1, characterized in that, The cylinder assembly includes a cylinder cover (1), a cylinder body (5), an exhaust valve (2), and a piston rod (4). A cavity is machined inside the cylinder body (5). The piston rod (4) is installed in the cavity and slides laterally within the cavity. The cylinder cover (1) is fixedly installed on the left end face of the cylinder body (5). An oil-resistant rubber pad (3) is installed between the cylinder cover (1) and the cylinder body (5), forming a sealed space between the cylinder cover (1) and the cylinder body (5). An exhaust valve (2) is installed on the upper part of the cylinder cover (1). An A port for hydraulic oil injection is machined at the center of the cylinder cover (1).

3. The axial loading and lubrication device for testing under-ring lubricated bearings according to claim 2, characterized in that, A lubricating oil passage (41) is machined on the piston rod (4), and an oil injection rod (8) is installed on the outer end of the piston rod (4). The oil injection rod (8) is a tubular structure with one end open and the other end closed. The open end of the oil injection rod (8) is connected to the lubricating oil passage (41) on the piston rod (4), and small oil injection holes (81) are machined on the outer circumferential surface of the oil injection rod (8).

4. An axial loading and lubrication device for testing under-ring lubricated bearings according to claim 3, characterized in that, A port B for lubricating oil is machined at the bottom of the cylinder body (5), and the port B is connected to the lubricating oil passage (41) machined on the piston rod (4).

5. An axial loading and lubrication device for testing under-ring lubricated bearings according to claim 4, characterized in that, Furthermore, in order to ensure that the axial loading does not produce an off-center load during the test, the center lines of the cylinder assembly, piston rod (4), force guide cover (7) and fixed support (6) must be on the same axis, and the right end face of the force guide cover (7) must be perpendicular to the axis.

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