Bearing testing machine lubricating mechanism and bearing testing machine

Abstract

The invention discloses a bearing testing machine lubricating mechanism and a bearing testing machine. The bearing testing machine lubricating mechanism comprises a flange plate, a flange end cover, an outer sleeve piece and an inner sleeve piece, an oil outlet I is formed in the first end face of the flange plate; the flange end cover comprises an end cover and a flange I arranged in the circumferential direction of a center hole of the end cover, a lubricating oil hole is further formed in the axial direction of the flange end cover and located in one side of the center hole of the end cover, the outer sleeve part is provided with a through cavity II in the axial direction, and the flange I of the flange end cover is sleeved with two ports of the cavity II of the outer sleeve part respectively. A lubricating oil channel I is formed in the outer sleeve part in the axial direction, one end of the lubricating oil hole is connected with the oil outlet I, and the other end of the lubricating oil hole is connected with the lubricating oil channel I; through structure optimization, the structure of the bearing testing machine is reasonably simplified, the dismounting box is convenient to replace the testing bearing, and the problem that the bearing of the existing testing machine is difficult to replace is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of testing machines, and in particular relates to a lubrication mechanism of a bearing testing machine and a bearing testing machine. Background Art

[0002] With the rapid development of modern industry in my country, rolling bearings have become the basic parts of universal application. High-speed rolling bearings are the core parts of high-end mechanical equipment, and their fatigue life has a great influence on the performance and service life of the main machine. Engineering and technical personnel have always been concerned about the operation of high-speed bearings because it determines the safety of the equipment. If a small bearing is damaged, it may cause many accidents. For example, my country's railway transportation is developing at a high speed, and the operating speed of electric locomotives is constantly increasing. At present, the 300km / h electric locomotive motor developed in my country has abnormal wear on the motor bearing during operation, resulting in increased vibration of the motor or even failure to operate. Therefore, in order to solve these problems and study the operating conditions of the motor bearing at 300km / h, it is necessary to use a high-speed bearing life tester to analyze and solve these problems.

[0003] In addition, when the bearing is installed, lubricated and well maintained, due to the effect of periodic variable stress, each load-bearing component will produce small pieces or pieces of peeling, forming pits or pits, which may cause fatigue pitting. This will cause noise, wear, vibration and temperature rise in the work of the parts, leading to failure of the parts, and various failure forms such as fatigue pitting, plastic deformation, wear, bonding, etc. will seriously affect the life of high-speed bearings. The dynamic performance of the bearing at high speed is not only affected by the preload, but also to a greater extent related to the speed and ball material properties. If there is a problem with the bearing during the production process, it will cause the failure of the entire mechanical transmission system, which will not only affect the production efficiency, but also cause huge economic losses. Therefore, it is very necessary to conduct reliability testing on the bearing during the production process. In order to suppress the excessive vibration of the high-speed rolling bearing-rotor system when passing the critical speed, a friction damping elastic support structure can be used. The bearing life tester can simulate the various loads, vibrations, temperatures, lubrication and other environments that the bearing is subjected to under actual working conditions, and conduct long-term running tests to achieve the purpose of evaluating the bearing life. Through the bearing life tester, we can fully and systematically understand the performance, life and reliability of bearings, and provide a scientific basis for the design and manufacture of bearing products. At the same time, in the future maintenance and care process, we can also replace or repair them in time according to the test results, thereby extending the service life of the bearings, reducing the failure rate, and improving production efficiency and product quality. Therefore, the study of bearing life testers has important practical significance and economic value.

[0004] In the related existing technologies, the safety, stability and accuracy of the testing machine still cannot meet the requirements. Secondly, in order to increase the test load and improve the test effect, some companies also enhance the test conditions by using heavier working media, changing the deformation of the bearing surface, etc. Although the simulation test technology can quickly evaluate the reliability of the bearing, its high cost, long cycle and coupling complexity are difficult to be effectively solved. Summary of the invention

[0005] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and to provide a bearing testing machine lubrication mechanism and a bearing testing machine. The device reasonably simplifies the structure of the bearing testing machine through structural optimization, facilitates the disassembly and replacement of test bearings, and solves the problem of difficulty in replacing bearings in existing testing machines.

[0006] One of the purposes of the present invention is to provide a bearing testing machine lubrication mechanism, comprising a flange, a flange end cover, an outer sleeve and an inner sleeve; the first end surface of the flange is provided with an oil outlet I; The flange end cover comprises an end cover and a flange I arranged in the circumferential direction of the center hole of the end cover, and a lubricating oil hole is also arranged along the axial direction of the flange end cover, and the lubricating oil hole is located on one side of the center hole of the end cover; The outer sleeve is provided with a through cavity II in the axial direction, and the two ports of the cavity II of the outer sleeve are respectively mounted on the flange I of the flange end cover, and the outer sleeve is provided with a lubricating oil passage I in the axial direction, one end of the lubricating oil hole is connected to the oil outlet I, and the other end is connected to the lubricating oil passage I; The inner set is installed in cavity II, and the inner set is axially provided with a lubricating oil passage II. The inner side wall of the outer set is formed with a connecting oil hole I connected to the lubricating oil passage I, and the outer side wall of the inner set is provided with a connecting oil hole II connected to the lubricating oil passage II. The connecting oil hole I and the connecting oil hole II are connected inside and outside to achieve the connection between the lubricating oil passage I and the lubricating oil passage II. The lubricating oil passage II is used to supply oil to a group of bearings located in the middle section of the rotor; the second end face of the flange is provided with an oil outlet II, and the oil outlet II is used to supply oil to a group of bearings located at both ends of the rotor.

[0007] As a preferred solution, an oil injection port communicating with oil outlet port I and oil outlet port II is also provided on the circumferential surface of the flange.

[0008] A second object of the present invention is to provide a bearing inspection and testing machine, comprising the bearing testing machine lubrication mechanism described in any one of the above items.

[0009] As a preferred solution, it also includes a rotor, a test bearing assembly, a companion test bearing assembly and a radial loading sleeve, wherein the rotor includes a large diameter section and small diameter sections located at both ends of the large diameter section, the large diameter section and the small diameter section are coaxially arranged, and a mounting step is formed at the connection between the large diameter section and the small diameter section; A test bearing assembly comprises a first test bearing and a second test bearing, wherein the first test bearing and the second test bearing are respectively mounted on the small diameter sections on both sides, and one end of the inner rings of the first test bearing and the second test bearing are respectively abutted against the mounting steps of the rotor; the inner rings of the first test bearing and the second test bearing are sleeved on the rotor, and the outer rings of the first test bearing and the second test bearing are sleeved with an outer sleeve, and the outer sleeve is sleeved with a radial loading sleeve, and both ends of the radial loading sleeve are fixedly connected to the flange end cover; A test bearing assembly, the test bearing assembly comprising a first test bearing and a second test bearing, the first test bearing and the second test bearing are located on the small diameter section of the rotor, and the first test bearing and the second test bearing are respectively located on both sides of the test bearing assembly; or, The rotor comprises a large diameter section and small diameter sections located at both ends of the large diameter section, the large diameter section and the small diameter section are coaxially arranged, and a mounting step is formed at the connection between the large diameter section and the small diameter section; A test bearing assembly comprises a first test bearing and a second test bearing, wherein the first test bearing and the second test bearing are respectively mounted on the small diameter sections on both sides, and one end of the inner ring of the first test bearing and the second test bearing is respectively abutted against the mounting step of the rotor; the inner rings of the first test bearing and the second test bearing are sleeved on the rotor, and the outer rings of the first test bearing and the second test bearing are sleeved with an outer sleeve, and the outer sleeve is sleeved with a radial loading sleeve, and the two ends of the radial loading sleeve are fixedly connected with the flange end cover; A test bearing assembly, wherein the test bearing assembly comprises a first test bearing and a second test bearing, wherein the first test bearing and the second test bearing are located on the small diameter section of the rotor, and the first test bearing and the second test bearing are respectively located on both sides of the test bearing assembly.

[0010] As a preferred embodiment, an axial loading mechanism is also included, which includes an axial loading hydraulic cylinder and an axial loading body. The axial loading hydraulic cylinder is located on a third bracket. The axial loading body is detachably connected to the piston rod of the axial loading hydraulic cylinder. The axial loading body can extend into the inner cavity of the loading inner sleeve in the second sleeve to apply axial loading force to the test bearing.

[0011] As a preferred solution, a first bushing is sleeved on the outside of the first companion bearing; a first end of the first bushing is fixed in the mounting cavity of the flange, and the other end of the first bushing is connected to the first bearing cover; The first bushing is provided with a cavity V in the axial direction, and the first bearing cover comprises an end plate and a flange II arranged at the center of the end plate, and the flange II extends into the cavity V to form an axial stop for one end of the first companion bearing or the first test bearing; The second companion bearing or the second test bearing is arranged inside the loading inner sleeve, the second sleeve is axially provided with a cavity VI, the loading inner sleeve is arranged in the cavity VI of the second sleeve, and one end of the second sleeve and the loading inner sleeve is fixed in the mounting cavity of the flange; the first sleeve and the second sleeve are respectively connected to the second bracket through a support frame.

[0012] As a preferred embodiment, it also includes a sleeve I and a sleeve II, wherein the two ends of the sleeve I are respectively abutted against the inner ring of the first test bearing and the inner ring of the first test bearing, and the two ends of the sleeve II are respectively abutted against the inner ring of the second test bearing and the inner ring of the second test bearing, and the other end of the inner ring of the second test bearing or the second test bearing is abutted against the shaft end cover, and the shaft end cover is fixed on the rotor.

[0013] As a preferred solution, it also includes a radial loading hydraulic cylinder, the piston rod of which can be fixedly connected to the outer wall of the radial loading sleeve through a stud.

[0014] As a preferred solution, the rotor further comprises a coupling section, the coupling section is connected to the small diameter section on one side, and the coupling section is connected to the rotating shaft of the driving motor via a coupling.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: First, the lubrication mechanism of the present scheme realizes the oil supply of the test bearing and the companion test bearing through structural improvement, through the coordination of the flange, the flange end cover, the outer set and the inner set, and combined with the design of the lubricating oil circuit, wherein the two end faces of the flange are respectively provided with oil outlet I and oil outlet II, wherein the oil outlet I is used to supply oil to a group of bearings located in the middle of the rotor through the lubricating oil channel I, the connecting oil hole I, the connecting oil hole II and the lubricating oil channel II, and the oil outlet II is used to directly supply oil to a group of bearings located at both ends of the rotor, thereby, the test bearing and the companion test bearing are respectively lubricated through a set of oil circuit systems, and the lubrication effect of the entire rotor system is realized, which ensures the lubrication effect during the test process while improving the reliability of the overall lubrication effect of the system.

[0016] Secondly, the bearing test machine of this scheme has a simpler and more reasonable structure through optimization and improvement, which is convenient for replacing the test bearing and solves the problem of difficulty in replacing the test bearing due to the complex structure of the test machine. The test bearing can be loaded with axial load through the axial loading hydraulic cylinder, the first frame, and the axial load loading body. The test bearing can be loaded with radial load through the radial loading hydraulic cylinder, the second frame, the radial load loading sleeve, the outer set and the inner set. The design structure of this scheme is simple and reasonable, easy to install, and the load loading is stable and reliable, which is convenient for maintenance. The axial load loading body can be replaced, which expands the scope of use of the axial load between loading different types of bearings. By expanding the scope of application of the axial load loading body, the equipment can simultaneously meet the axial load requirements under different working conditions, so that it is more stable and reliable during use. Expanding the scope of application of the axial load loading body can help reduce the cost of equipment update and maintenance, and improve equipment utilization and economic benefits. In addition, expanding the scope of application of the axial load loading body can also improve the production efficiency and production quality of the equipment, so that the equipment can maintain an efficient and stable operating state under different working conditions, thereby enhancing the competitiveness of the enterprise. Therefore, expanding the application scope of axial load loading bodies is of great significance, which can help improve the adaptability and flexibility of testing equipment, improve production efficiency and quality, reduce maintenance costs, and bring more significant economic benefits.

[0017] Third, this solution takes into account that the test machine will generate a lot of heat and friction during long-term operation, and these factors will cause certain wear and damage to the test bearings and transmission devices inside the test machine. (In the prior art, the test machine needs to clamp and fix the test bearings during the test, and the fixtures and fixtures of the test machine often generate certain friction and pressure on the test bearings, which in turn causes wear or deformation on the surface.) This solution can reduce damage to the test bearings by installing a companion test bearing on the outside or inside of the test bearing, ensuring the reliability and accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A three-dimensional diagram of the testing machine of the present invention; Figure 2 It is a front view of the testing machine of the present invention; Figure 3 A top view of the testing machine of the present invention; Figure 4 is a cross-sectional view of the testing machine of the present invention; Figure 5 This is a schematic diagram of the installation of a test bearing according to the first embodiment of the present invention; Figure 6 This is a schematic diagram of the installation of a test bearing according to the second embodiment of the present invention; Figure 7 It is a structural cross-sectional view of a third embodiment of the present invention; Figure 8 It is the internal structure diagram of the hydraulic cylinder in the present invention; Fig. 9 It is a structural diagram of the radial loading sleeve in the present invention; Fig.10 It is a structural diagram of the flange end cover in the present invention; Fig.11 is a structural diagram of the rotor in the present invention; Fig.12 It is a structural diagram of the axial loading body in the present invention; Fig.13 It is a structural diagram of the bushing in the present invention; Fig.14 It is a structural diagram of the flange in the present invention; Fig.15 It is a structural diagram of the foreign kit of the present invention; Markings in the figure: 1. Flange, 1-1. Cavity Ⅰ, 1-2. Oil injection port, 1-3. Oil outlet Ⅰ, 1-4. Oil outlet Ⅱ, 1-5. Installation cavity, 1-6. Nozzle joint, 2. Flange end cover, 2-1. Center hole of end cover, 2-2. Flange Ⅰ, 2-3. Lubricating oil hole, 2-4. Installation groove, 2-5. Through hole, 3. Outer set, 3-1. Lubricating oil passage Ⅰ, 3-2. Connecting oil hole Ⅰ, 3-3. Cavity Ⅱ, 4. Inner set, 4-1. Lubricating oil passage Ⅱ, 4-2. Connecting oil hole Ⅱ, 4-3. Cavity Ⅲ, 5. Rotor, 5-1. Large diameter section, 5-2. Small diameter section, 5-3. Coupling section, 5-4. Installation step, 5-5. Keyway, 5-6. Key, 6. Radial loading sleeve, 6-1. Cavity Ⅳ, 6-2. Screw hole, 6-3 , threaded through hole, 7, first test bearing, 8, second test bearing, 9, first accompanying test bearing, 10, second accompanying test bearing, 11, first bushing, 12, second bushing, 121, cavity VI, 122, stop boss, 123, threaded blind hole, 13, transparent cover I, 15, support frame, 16, axially loaded hydraulic cylinder, 161, cylinder body, 162, cylinder head end cover, 163, cylinder bottom end cover, 164, step seal, 165, piston rod, 166, piston, 167, guide sleeve, 168, sealing ring I, 169, sealing ring II, 17, axial loading body, 171, end face cavity, 172, positioning screw hole, 18, shaft sleeve I, 19, shaft sleeve II, 20, radially loaded hydraulic cylinder, 21, transparent cover II, 22, shaft end cover, 23, loading inner sleeve, 24. Oil deflector ring I, 25. Oil deflector ring II, 26. Sealing ring, 27. Felt ring, 28. Elastic support ring, 30. First bracket, 40. Second bracket, 50. Third bracket, 60. Driving motor, 70. Coupling, 101. Bolt I, 102. Bolt II, 103. Bolt III, 104. Bolt IV, 105. Screw, 106. Positioning screw, 110. Flange I, 120. Flange II, 210. Flange end cover I, 220. Flange end cover II. DETAILED DESCRIPTION

[0020] The present invention is described in detail below by means of exemplary embodiments. However, it should be understood that, without further description, elements, structures and features in one embodiment may also be beneficially combined in other embodiments.

[0021] It should be noted that, unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the invention belongs. The words "one", "an" or "the" and the like used in the patent application specification and claims of the present invention do not express quantitative limitations, but indicate the existence of at least one. Words such as "include" or "comprise" indicate that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalents, but do not exclude other elements or objects with the same function.

[0022] Example 1 The present embodiment provides a lubrication mechanism of a bearing testing machine, including a flange end cover 2, an outer set 3 and an inner set 4, wherein the outer set 3 and the inner set 4 are both shaft sleeve structures and are coaxially nested, the outer set 3 is axially provided with a cavity II3-3 for accommodating the inner set 4, the inner set 4 is located in the inner middle section of the cavity II3-3, the flange end cover 2 includes a flange end cover I210 and a flange end cover II220; the flange end cover I210 and the flange end cover II220 both include an end cover and The flange Ⅰ2-2 is located on the end face of one side of the end cover, and an end cover center hole 2-1 is formed in the center of the flange end cover 2. The flange Ⅰ2-2 is arranged around the circumference of the end cover center hole 2-1. The flange Ⅰ2-2 of the flange end cover Ⅰ210 extends into the first port of the cavity Ⅱ3-3 and abuts against the first end of the outer ring of the first test bearing 7. The flange Ⅰ2-2 of the flange end cover Ⅱ220 extends into the second port of the cavity Ⅱ3-3 and abuts against the first end of the outer ring of the second test bearing 8.

[0023] In this solution, the outer sleeve 3 is also provided with a lubricating oil passage Ⅰ3-1 along the axial direction, and the lubricating oil passage Ⅰ3-1 is located on the outer side wall of the cavity Ⅱ3-3, and a connecting oil hole Ⅰ3-2 is also provided on the inner wall of the cavity Ⅱ3-3. Felt rings 27 are respectively provided between the two ends of the outer sleeve 3 and the radial loading sleeve 6 and the flange end cover Ⅰ210 and the flange end cover Ⅱ220.

[0024] In this solution, the inner sleeve 4 is formed with a cavity III4-3 along the axial direction, and the interior of the cavity III4-3 is used to pass the rotor 5. The cavity III4-3 and the rotor 5 form a clearance fit, that is, the inner sleeve 4 acts as a spacer. The inner sleeve 4 is also provided with a lubricating oil passage II4-1 along the axial direction. The lubricating oil passage II4-1 is located on one side of the cavity III4-3. The outer wall of the inner sleeve 4 is also provided with a connecting oil hole II4-2. The connecting oil hole I3-2 and the connecting oil hole II4-2 are connected inside and outside to achieve the connection between the lubricating oil passage I3-1 and the lubricating oil passage II4-1. The two ends of the inner sleeve 4 are respectively in contact with the outer rings of the first test bearing 7 (test bearing 1) and the second test bearing 8 (test bearing 2), and the inner sleeve 4 does not contact the inner rings of the first test bearing 7 and the second test bearing 8; the inner rings of the first test bearing 7 and the second test bearing 8 are in contact with the mounting step 5-4 of the rotor 5.

[0025] In this solution, both flange end cover Ⅰ210 and flange end cover Ⅱ220 are provided with lubricating oil holes 2-3 in the axial direction, flange Ⅰ110 is located on the outside of flange end cover Ⅰ210, and flange Ⅰ110 is provided with oil outlet Ⅰ1-3 on the end surface opposite to flange end cover Ⅰ210, and oil outlet Ⅰ1-3 of flange Ⅰ110 is butted with the first end of lubricating oil passage Ⅰ3-1 through lubricating oil hole 2-3, and flange Ⅱ120 is provided with oil outlet Ⅰ1-3 on the end surface opposite to flange end cover Ⅱ220, and oil outlet Ⅰ1-3 of flange Ⅱ120 is butted with the second end of lubricating oil passage Ⅰ3-1 through lubricating oil hole 2-3. Thus, oil is simultaneously supplied to lubricating oil passage Ⅰ3-1 through the flanges at both ends. The first test bearing 7 and the second test bearing 8 are respectively provided at the two ends of lubricating oil passage Ⅱ4-1, so that lubricating oil passage Ⅱ4-1 is used to supply oil to the first test bearing 7 and the second test bearing 8 respectively.

[0026] In this embodiment, an oil outlet II1-4 is further provided on the end face of the flange I110 opposite to the flange end cover I210, and a first test bearing 9 (test bearing 1) is correspondingly provided at the end of the oil outlet II1-4 of the flange I110. An oil outlet II1-4 is further provided on the end face of the flange II120 opposite to the flange end cover II220, and a second test bearing 10 (test bearing 2) is correspondingly provided at the end of the oil outlet II1-4 of the flange II120, thereby supplying oil to the first test bearing 9 and the second test bearing 10 respectively.

[0027] In this embodiment, the outer circumference of the flange I 110 and the flange II 120 are both provided with oil injection ports 1-2, and the oil injection ports 1-2 are provided with nozzle joints 1-6 for supplying oil to the inside of the lubrication mechanism respectively. The first test bearing 7, the second test bearing 8, the first accompanying test bearing 9 and the second accompanying test bearing 10 are coaxially arranged.

[0028] In this embodiment, there is another implementation as follows, which is the same as the other structures mentioned above, except that: the first test bearing 7 and the first accompanying test bearing 9 are interchanged, and the second test bearing 8 and the second accompanying test bearing 10 are interchanged. In this implementation, the oil outlet I1-3 is used to supply oil to the first accompanying test bearing 9 and the second accompanying test bearing 10 respectively, and the oil outlet II1-4 is used to supply oil to the first accompanying test bearing 9 and the second accompanying test bearing 10 respectively.

[0029] Example 2 The present embodiment provides a bearing testing machine, comprising a rotor 5, a test bearing assembly, a companion test bearing assembly, a radial loading sleeve 6 and the lubrication mechanism in Embodiment 1, wherein the test bearing assembly comprises a first test bearing 7 and a second test bearing 8, the companion test bearing assembly comprises a first companion test bearing 9 and a second companion test bearing 10, the first companion test bearing 9 and the second companion test bearing 10 are respectively located on the outer sides of both ends of the test bearing assembly, the first companion test bearing 9, the first test bearing 7, the second test bearing 8 and the second companion test bearing 10 are sequentially mounted on the rotor 5 and are coaxially arranged.

[0030] In this solution, the rotor 5 includes a large diameter section 5-1, a small diameter section 5-2 and a coupling section 5-3. The small diameter section 5-2 is provided with two sections and is respectively located at the two ends of the large diameter section 5-1. The large diameter section 5-1, the small diameter section 5-2 and the coupling section 5-3 are coaxially arranged, and a mounting step 5-4 is formed at the connection between the large diameter section 5-1 and the small diameter section 5-2; the first test bearing 7 and the second test bearing 8 are respectively installed on the two small diameter sections 5-2, and one end of the inner ring of the first test bearing 7 and the second test bearing 8 respectively cooperates with the mounting steps 5-4 on both sides to form an axial stop, and the other end of the inner ring of the first test bearing 7 abuts against the sleeve I18, thereby forming the axial positioning of the first test bearing 7, and the other end of the inner ring of the second test bearing 8 abuts against the sleeve II19, thereby forming the axial positioning of the second test bearing 8. The coupling section 5-3 of the rotor 5 is connected to the power output shaft of the drive motor 60 through the coupling 70 and the bolt I 101. Specifically, the coupling section 5-3 of the rotor 5 is connected to the coupling 70 through the key 5-6 and the keyway 5-5, and the coupling 70 is connected through the bolt I. The drive motor 60, the coupling 70 and the third bracket 50 for supporting the drive motor 60 constitute a speed control part.

[0031] In this embodiment, a cavity Ⅰ1-1 is formed along the axial center of the flange Ⅰ110, one end of the sleeve Ⅰ18 is installed in the center hole of the flange end cover Ⅰ210, and the other end passes through the cavity Ⅰ1-1 of the flange Ⅰ110 and extends out, the end of the cavity Ⅰ1-1 abuts against one end of the inner ring of the first companion test bearing 9, the first end of the flange Ⅰ110 is formed with a central boss in contact with the flange end cover Ⅰ210, the second end of the flange Ⅰ110 is formed with a mounting cavity for connecting the first bushing 11, and one end of the first bushing 11 is fixed inside the mounting cavity of the flange Ⅰ110 by a stud. An annular mounting groove 24 is provided in the inner ring of the center hole of the flange end cover Ⅰ210, and an O-ring 26 is installed in the mounting groove 24 to achieve sealing between the sleeve Ⅰ18 and the flange end cover Ⅰ210.

[0032] In this solution, the first bushing 11 is formed with a cavity V along the axial direction, and the first bushing 11 is sleeved on the outside of the first test bearing 9. The flange of the transparent cover Ⅰ13 penetrates into the cavity V of the first bushing 11, and the first test bearing 9 is axially positioned from the other end. The transparent cover Ⅰ13 and the first bushing 11 are fixedly connected by bolts Ⅱ102. It should be noted that an oil retaining ring Ⅰ24 is also provided between the first test bearing 9 and the transparent cover Ⅰ13, and the oil retaining ring Ⅰ24 is used to seal the lubricating oil of the first test bearing 9 and axially position and stop the first test bearing 9. After the first bushing 11 and the transparent cover Ⅰ13 are butt-jointed, a groove area for connecting with the support frame 15 is formed on the periphery thereof.

[0033] In this embodiment, the flange II 120 at the other end of the testing machine body forms a cavity along the axial center, one end of the sleeve II 19 is installed in the center hole of the flange end cover II 220, and the other end passes through the cavity of the flange II 120 and extends out, the end of the sleeve II 19 abuts against one end of the inner ring of the second companion test bearing 10, the first end of the flange II 120 forms a center boss in contact with the flange end cover II 220, the second end of the flange II 120 forms a mounting cavity for connecting the second bushing 12, one end of the second bushing 12 is fixed inside the mounting cavity of the flange II 120 by a stud, the inner ring of the center hole of the flange end cover II 220 is provided with an annular groove, and an O-ring 26 is installed in the mounting groove 24 to achieve sealing between the sleeve II 19 and the flange end cover II 220. The other end is fixedly connected to the transparent cover II 21 by bolts IV 104, and the inner cavity of the transparent cover II 21 is interference-fitted with the loading inner sleeve 23, and the loading inner sleeve is loaded. One end of the second bushing 12 is fixed inside the mounting cavity 1-5 of the flange II 120, and is screwed into the threaded blind hole 123 of the second bushing 12 and fixed by screws. The second bushing 12 is circumferentially provided with a stop boss 122 that cooperates with the flange II 120. The second bushing 12 is formed with a cavity VI 121 along the axial direction, and the cavity VI 121 of the second bushing 12 is sleeved on the outside of the second test bearing 10. The other end of the second test bearing 10 is provided with an axial end cover 22, which is fixedly connected to the rotor 5 by screws 105, and abuts against the inner ring of the second test bearing 10, forming an axial stop for the second test bearing 10.

[0034] In this embodiment, a lubrication mechanism for providing lubricating oil to the testing machine body is also included. The lubrication mechanism is arranged on the periphery of the rotor 5, the test bearing assembly, and the companion test bearing assembly, and is used to supply oil and lubrication to the test bearing assembly and the companion test bearing assembly.

[0035] The lubrication mechanism can be implemented as follows: a flange end cover 2, an outer set 3 and an inner set 4, wherein the outer set 3 and the inner set 4 are both shaft sleeve structures and are coaxially nested, the outer set 3 is axially provided with a cavity II3-3 for accommodating the inner set 4, the inner set 4 is located in the inner middle section of the cavity II3-3, the flange end cover 2 includes a flange end cover I210 and a flange end cover II220; the flange end cover I210 and the flange end cover II220 both include an end cover and a flange I2-2 located on one end face of the end cover, the center of the flange end cover 2 is formed with an end cover center hole 2-1, The flange Ⅰ2-2 is arranged around the circumference of the center hole 2-1 of the end cover, the flange Ⅰ2-2 of the flange end cover Ⅰ210 extends into the first port of the cavity Ⅱ3-3 and abuts against the first end of the outer ring of the first test bearing 7, the flange Ⅰ2-2 of the flange end cover Ⅱ220 extends into the second port of the cavity Ⅱ3-3 and abuts against the first end of the outer ring of the second test bearing 8, and the outer sleeve 3 is also axially provided with a lubricating oil channel Ⅰ3-1, which is located on the outer side wall of the cavity Ⅱ3-3, and a connecting oil hole Ⅰ3-2 is also provided on the inner wall of the cavity Ⅱ3-3.

[0036] In this solution, the inner sleeve 4 is formed with a cavity III4-3 along the axial direction, and the interior of the cavity III4-3 is used to pass the rotor 5, and the cavity III4-3 forms a clearance fit with the rotor 5. The inner sleeve 4 is also provided with a lubricating oil passage II4-1 along the axial direction, and the lubricating oil passage II4-1 is located on one side of the cavity III4-3. The outer wall of the inner sleeve 4 is also provided with a connecting oil hole II4-2, and the connecting oil hole I3-2 and the connecting oil hole II4-2 are connected inside and outside to achieve the connection between the lubricating oil passage I3-1 and the lubricating oil passage II4-1.

[0037] In this solution, a radial loading sleeve 6 is provided on the outside of the outer sleeve 3, and the radial loading sleeve 6 is provided with a cavity IV6-1 for accommodating the outer sleeve 3 along the axial direction, and the two ends of the radial loading sleeve 6 are respectively fixedly connected with the flange end cover I210 and the flange end cover II220 through bolts III103, and screw holes 6-2 connected with the bolts III103 are provided on the two ends of the radial loading sleeve 6, and the flange end cover I210 and the flange end cover II220 are respectively provided with through holes 2-5 corresponding to the screw holes 6-2, and the outer wall of the radial loading sleeve 6 is provided with a threaded through hole 6-3, and is connected to the piston rod of the radial loading hydraulic cylinder 20 through the threaded through hole 6-3. The radial loading sleeve 6 is subjected to a radial force by the piston rod of the radial loading hydraulic cylinder 20, so as to apply a radial load test to the first test bearing 7 and the second test bearing 8.

[0038] In this solution, both flange end cover Ⅰ210 and flange end cover Ⅱ220 are provided with lubricating oil holes 2-3 along the axial direction, flange Ⅰ110 is located on the outside of flange end cover Ⅰ210, and flange Ⅰ110 is provided with oil outlet Ⅰ1-3 on the end surface opposite to flange end cover Ⅰ210, and oil outlet Ⅰ1-3 of flange Ⅰ110 is butted with the first end of lubricating oil passage Ⅰ3-1 through lubricating oil hole 2-3, and flange Ⅱ120 is provided with oil outlet Ⅰ1-3 on the end surface opposite to flange end cover Ⅱ220, and oil outlet Ⅰ1-3 of flange Ⅱ120 is butted with the second end of lubricating oil passage Ⅰ3-1 through lubricating oil hole 2-3. Thus, oil is simultaneously supplied to lubricating oil passage Ⅰ3-1 through the flanges at both ends. The first test bearing 7 and the second test bearing 8 are respectively provided at the two ends of lubricating oil passage Ⅱ4-1, so that lubricating oil passage Ⅱ4-1 is used to supply oil to the first test bearing 7 and the second test bearing 8 respectively.

[0039] In this embodiment, an oil outlet II1-4 is further provided on the end face of the flange I110 opposite to the flange end cover I210, and a first test bearing 9 is correspondingly provided at the end of the oil outlet II1-4 of the flange I110. An oil outlet II1-4 is further provided on the end face of the flange II120 opposite to the flange end cover II220, and a second test bearing 10 is correspondingly provided at the end of the oil outlet II1-4 of the flange II120, thereby supplying oil to the first test bearing 9 and the second test bearing 10 respectively.

[0040] In this embodiment, the outer circumference of flange I 110 and flange II 120 are both provided with oil injection ports 1-2 for supplying oil to the lubrication mechanism. The first test bearing 7, the second test bearing 8, the first accompanying test bearing 9 and the second accompanying test bearing 10 are coaxially arranged. The first accompanying test bearing 9 and the second accompanying test bearing 10 are angular contact ball bearings.

[0041] In order to realize the axial loading test of the test bearing, this scheme requires, on the basis of the above-mentioned lubrication mechanism, that the first test bearing 7 and the first companion test bearing 9 are interchanged, and the second test bearing 8 and the second companion test bearing 10 are interchanged. Thus, the axial loading body 17 directly applies the axial loading force to the test bearing. In this scheme, the axial loading body 17 extends into the cavity VI of the second bushing 12, and the axial loading body 17 applies the axial loading load to the second test bearing 8 through the oil retaining ring II 25. An end face cavity 171 is formed on the side of the axial loading body 17 facing the rotor 5, and the end face cavity 171 is used to accommodate and make way for the shaft end of the rotor 5. A positioning screw hole 172 is provided on the axial loading body 17, and a positioning screw 106 is installed in the positioning screw hole 172. The axial loading body 17 is fixedly connected to the piston rod of the axial loading hydraulic cylinder 16 by bolts. With such a design, different axial loading bodies 17 can be replaced according to different bearings for adaptation. A loading inner sleeve 23 is disposed on the periphery of the axial loading body 17, and a cavity is disposed in the axial direction of the loading inner sleeve 23, and the axial loading body 17 is installed in the cavity of the loading inner sleeve 23. A limited stop groove 107 is formed in the axial direction of the loading inner sleeve 23, and a positioning screw 106 of the axial loading body 17 cooperates with the limited stop groove 107. When the positioning screw 106 moves along the axial direction with the axial loading body 17 toward the second test bearing 8, the limited stop groove 107 will limit the maximum movement limit position of the axial loading body 17.

[0042] In this scheme, the axially loaded hydraulic cylinder 16 is the core component of the axial load loading part, and the axially loaded hydraulic cylinder 16 can be implemented as follows: it includes a cylinder body 161, and the cylinder body 161 forms a cavity for the movement of the piston 166 along the axial direction. The two ends of the cavity of the cylinder body 161 are respectively fixedly connected with a cylinder head end cover 162 and a cylinder bottom end cover 163, wherein a center hole through which the first end of the piston rod 165 extends is formed in the center of the cylinder head end cover 162, and a step seal 164 is circumferentially arranged on the center hole for sealing the piston rod 165 and the inner wall of the center hole, and the second end of the piston rod 165 is fixedly connected to the piston 166, and a guide sleeve 167 is circumferentially installed on the outer periphery of the piston 166, and the guide sleeve 167 contacts the inner wall of the cavity of the cylinder body 161, and a sealing ring I 168 is also circumferentially arranged on the piston 166 for sealing the hydraulic oil on this side, and a sealing ring II 169 is circumferentially arranged on the cylinder bottom end cover 162 for sealing the hydraulic oil on this side. The cylinder bottom end cover 163 is provided with an oil supply channel, and an oil chamber space of hydraulic oil is formed between the piston 166 and the cylinder bottom end cover 163. The oil chamber space pushes the piston to move according to the oil supply, thereby realizing automatic expansion or contraction, and realizing the telescopic function of the piston rod 165. When working, the hydraulic oil is introduced through the oil channel at the bottom of the hydraulic cylinder to apply pressure to the piston 166, and the piston 166 begins to move along the cylinder body 161 of the hydraulic cylinder. The internal structure of the radial loading hydraulic cylinder 20 is the same as or similar to that of the axial loading hydraulic cylinder 16.

[0043] Another embodiment of the present invention is that an elastic support ring 28 is arranged in the cavity of the first bushing 11 at a position corresponding to the bearing, and an elastic support sleeve 28 is arranged in the cavity of the loading inner sleeve 23 at a position corresponding to the bearing, and the elastic support sleeve 28 is respectively in contact with the outer rings of the first test bearing 9 and the second test bearing 10. Or the elastic support sleeve 28 is respectively in contact with the outer rings of the first test bearing 7 and the second test bearing 8. The elastic support ring 28 arranged on the test machine can reduce vibration and noise, improve stability, reduce friction, and improve precision. Its friction damping elastic support can effectively reduce the energy transmitted to the bearing and other components by mechanical vibration, thereby reducing the noise and vibration generated by the test machine. This helps to protect the bearing and other key components from damage caused by vibration and impact, and prolong their service life. The elastic support structure can improve the stability and balance of the test machine, making it more stable when running at high speed. This helps to ensure that the bearing is accurately tested and evaluated, and avoid errors caused by the instability of the test machine itself. The friction damping elastic support can reduce the friction between the bearing and the support structure, and reduce energy loss and heat generation. This helps improve the efficiency of the test machine and is particularly important for long-term tests, which can reduce wear and heat accumulation caused by friction. The elastic support structure can reduce the impact of external interference on the test results and improve the test accuracy of the test machine. This is particularly important for bearing performance evaluation that requires high-precision measurement, which can ensure the accuracy and reliability of the test results, thereby providing more reliable support for bearing research and development work.

[0044] The present invention provides a high-speed bearing life and motion state detection test machine to complete the high-speed bearing life experiment. The present invention mainly includes four parts, a speed control part, a test machine structure body, an axial load loading part and a radial load loading part. The present invention can load the test bearing with an axial load through an axial loading hydraulic cylinder 16, a first bracket 30, and an axial load body 17. The structural design is simple and convenient to install. The load loading in this scheme is stable and reliable, and it is easy to maintain. Since the axial load body and the axial loading hydraulic cylinder 16 are detachably connected by bolts, the axial load body 17 can be replaced, which expands the use range of the axial load between loading different types of bearings. By expanding the applicable scope of the axial load body 17, the equipment can simultaneously meet the axial load requirements under different working conditions, so that it is more stable and reliable during use. Expanding the applicable scope of the axial load body can help reduce the equipment update and maintenance costs, and improve the equipment utilization rate and economic benefits. In addition, expanding the applicable scope of the axial load body can also improve the production efficiency and production quality of the equipment, so that the equipment can maintain an efficient and stable operating state under different working conditions. Therefore, expanding the scope of application of the axial load loading body can improve the adaptability and flexibility of the equipment, improve production efficiency and quality, reduce maintenance costs, and also bring more significant economic benefits.

[0045] In this solution, the bearing tester needs to apply a certain load to the test bearing. For radial load, a vertical downward force needs to be applied to the test bearing, while for axial load, the force needs to be along the axis of the main shaft, and the applied pressure needs to be kept stable. In the present invention, both the axial loading hydraulic cylinder 16 and the radial loading hydraulic cylinder can be a tie rod type hydraulic cylinder.

[0046] This machine optimizes the structure to make the structural design simple and reasonable, which is convenient for replacing the test bearing. At the same time, vibration sensors and temperature sensors are pre-installed in the tooling for assembling the test bearing to monitor the bearing vibration and temperature changes in real time during the test, so that the test data is more accurate and the bearing state when the bearing is about to fail is collected. Specifically, the flange 1 is provided with a vibration sensor and a temperature sensor for monitoring the operating state of the test bearing, and the outer set 3 is also provided with a vibration sensor and a temperature sensor for monitoring the operating state of the test bearing. The vibration sensor and the temperature sensor can be transmitted wirelessly or wired. The temperature sensor can be provided along the circumference of the flange 1 and / or the outer set 3. For example, the outer set 3 is provided with mounting holes for the vibration sensor and the temperature sensor, and the above-mentioned sensors are fixed inside the mounting holes. The vibration sensor is used to detect the vibration of the test bearing, including information such as amplitude, frequency and phase, so as to understand the operating state of the bearing in real time, detect abnormal vibration signals in time and prevent equipment failure. Secondly, the temperature sensor can measure the temperature of the bearing, which can not only help keep the bearing running within the normal temperature range, but also be used to determine whether the bearing has problems such as overheating. Finally, the built-in vibration sensor and temperature sensor are used together to comprehensively monitor the movement state of the bearing, so as to understand the working state of the bearing more comprehensively and accurately, detect bearing failures in time, and take effective measures to deal with them, which is convenient for data collection and experimental control.

[0047] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. Bearing testing machine lubrication mechanism, characterized by: It includes a flange, a flange end cover, an outer set and an inner set; The first end surface of the flange is provided with an oil outlet I; The flange end cover comprises an end cover and a flange I arranged in the circumferential direction of the center hole of the end cover, and a lubricating oil hole is also arranged along the axial direction of the flange end cover, and the lubricating oil hole is located on one side of the center hole of the end cover; The outer sleeve is provided with a through cavity II in the axial direction, and the two ports of the cavity II of the outer sleeve are respectively mounted on the flange I of the flange end cover, and the outer sleeve is provided with a lubricating oil passage I in the axial direction, one end of the lubricating oil hole is connected to the oil outlet I, and the other end is connected to the lubricating oil passage I; The inner set is installed in cavity II, and the inner set is axially provided with a lubricating oil passage II. The inner side wall of the outer set is formed with a connecting oil hole I connected to the lubricating oil passage I, and the outer side wall of the inner set is provided with a connecting oil hole II connected to the lubricating oil passage II. The connecting oil hole I and the connecting oil hole II are connected inside and outside to achieve the connection between the lubricating oil passage I and the lubricating oil passage II. The lubricating oil passage II is used to supply oil to a group of bearings located in the middle section of the rotor; the second end face of the flange is provided with an oil outlet II, and the oil outlet II is used to supply oil to a group of bearings located at both ends of the rotor.

2. The bearing testing machine lubrication mechanism according to claim 1, characterized in that: The circumferential surface of the flange is also provided with an oil injection port which is communicated with the oil outlet port I and the oil outlet port II.

3. Bearing detection test machine, characterized by: The invention comprises the lubrication mechanism of the bearing testing machine as claimed in claim 1 or 2.

4. The bearing detection and testing machine according to claim 3 is characterized in that: It also includes a rotor, a test bearing assembly, a companion test bearing assembly and a radial loading sleeve, wherein the rotor includes a large diameter section and small diameter sections located at both ends of the large diameter section, the large diameter section and the small diameter section are coaxially arranged, and a mounting step is formed at the connection between the large diameter section and the small diameter section; A test bearing assembly comprises a first test bearing and a second test bearing, wherein the first test bearing and the second test bearing are respectively mounted on the small diameter sections on both sides, and one end of the inner rings of the first test bearing and the second test bearing are respectively abutted against the mounting steps of the rotor; the inner rings of the first test bearing and the second test bearing are sleeved on the rotor, and the outer rings of the first test bearing and the second test bearing are sleeved with an outer sleeve, and the outer sleeve is sleeved with a radial loading sleeve, and both ends of the radial loading sleeve are fixedly connected to the flange end cover; A test bearing assembly, the test bearing assembly comprising a first test bearing and a second test bearing, the first test bearing and the second test bearing are located on the small diameter section of the rotor, and the first test bearing and the second test bearing are respectively located on both sides of the test bearing assembly; or, The rotor comprises a large diameter section and small diameter sections located at both ends of the large diameter section, the large diameter section and the small diameter section are coaxially arranged, and a mounting step is formed at the connection between the large diameter section and the small diameter section; A test bearing assembly comprises a first test bearing and a second test bearing, wherein the first test bearing and the second test bearing are respectively mounted on the small diameter sections on both sides, and one end of the inner ring of the first test bearing and the second test bearing is respectively abutted against the mounting step of the rotor; the inner rings of the first test bearing and the second test bearing are sleeved on the rotor, and the outer rings of the first test bearing and the second test bearing are sleeved with an outer sleeve, and the outer sleeve is sleeved with a radial loading sleeve, and the two ends of the radial loading sleeve are fixedly connected with the flange end cover; A test bearing assembly, wherein the test bearing assembly comprises a first test bearing and a second test bearing, wherein the first test bearing and the second test bearing are located on the small diameter section of the rotor, and the first test bearing and the second test bearing are respectively located on both sides of the test bearing assembly.

5. The bearing detection and testing machine according to claim 4 is characterized in that: It also includes an axial loading mechanism, which includes an axial loading hydraulic cylinder and an axial loading body. The axial loading hydraulic cylinder is located on a third bracket. The axial loading body is detachably connected to the piston rod of the axial loading hydraulic cylinder. The axial loading body can extend into the inner cavity of the loading inner sleeve in the second sleeve to apply axial loading force to the test bearing.

6. The bearing detection and testing machine according to claim 5, characterized in that: The first test bearing is externally sleeved with a first bushing; a first end of the first bushing is fixed in the mounting cavity of the flange, and the other end of the first bushing is connected to the first bearing cover; The first bushing is provided with a cavity V in the axial direction, and the first bearing cover comprises an end plate and a flange II arranged at the center of the end plate, and the flange II extends into the cavity V to form an axial stop for one end of the first companion bearing or the first test bearing; The second companion bearing or the second test bearing is arranged inside the loading inner sleeve, the second sleeve is axially provided with a cavity VI, the loading inner sleeve is arranged in the cavity VI of the second sleeve, and one end of the second sleeve and the loading inner sleeve is fixed in the mounting cavity of the flange; the first sleeve and the second sleeve are respectively connected to the second bracket through a support frame.

7. The bearing detection tester according to claim 4 or 5, characterized in that: It also includes a sleeve I and a sleeve II, the two ends of the sleeve I are respectively abutted against the inner ring of the first test bearing and the inner ring of the first test bearing, the two ends of the sleeve II are respectively abutted against the inner ring of the second test bearing and the inner ring of the second test bearing, the other end of the inner ring of the second test bearing or the second test bearing is abutted against the shaft end cover, and the shaft end cover is fixed on the rotor.

8. The bearing detection tester according to claim 4 or 5, characterized in that: It also includes a radial loading hydraulic cylinder, the piston rod of which can be fixedly connected to the outer wall of the radial loading sleeve through a stud.

9. The bearing detection tester according to claim 5, characterized in that: The rotor further comprises a coupling section, wherein the coupling section is connected to the small diameter section on one side, and the coupling section is connected to the rotating shaft of the driving motor via a coupling.

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