Device for carrying out durability and dry running test by simulating working condition of bearing

Abstract

The utility model relates to the technical field of bearing performance tests, in particular to a device for testing durability and dry running performance by simulating the working condition of a bearing. The main shaft is arranged on the shell and is provided with an end part accompanying test bearing, two middle part accompanying test bearings and a test bearing; the first end sleeve sleeves the outer ring of the end part accompanying test bearing; the first universal piece square iron sleeves the outer diameter of the first end sleeve; the radial load loading end portion abuts against the middle lining so as to transmit the radial load to the test bearing through the two middle accompanying test bearings and the main shaft in sequence. The bushing sleeves the outer ring of the test bearing, and a plurality of oil passing holes are uniformly formed in the circumference of the bushing; the second end sleeve is sleeved on the bushing; the axial load loading end portion abuts against the vertical plate so as to transmit the axial load to the test bearing through the second universal piece square iron, the second end sleeve and the lining in sequence. According to the utility model, axial and radial loads can be loaded on the test bearing, a working condition lubrication mode can be simulated in the test process, the operation stability is maintained, and unbalance loading is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing performance testing, in particular to a device for simulating bearing working conditions to conduct durability and dry running tests. Background Art

[0002] The bearing durability test is conducted to determine the service life of bearing products under specified use and maintenance conditions, and to predict or verify the weak links and dangerous parts of the structure. The test time of the durability test is generally longer than the reliability test. Through the durability test, it is possible to find out which parts in the design and manufacture of bearing products have reliability problems, so as to improve the design or process level. At the same time, by measuring the wear changes of the main parts, the service life of the bearing products can be calculated.

[0003] The dry-running test of bearings is a test conducted to simulate the operating conditions of bearings. The test bearings are cut off from oil during use. This test is used to assess whether the test bearings meet the requirements for oil-free use.

[0004] Existing test equipment cannot simulate working conditions for durability (working conditions have special lubrication requirements), nor can it perform dry-running tests on test bearings alone. For example, if the entire bearing is cut off from oil for dry-running tests, the working bearing will not meet the requirements and the test results will be less reliable. Utility Model Content

[0005] In view of the defects of the prior art, the utility model provides a device for simulating bearing working conditions to conduct durability and dry-running tests. The device tests the test bearing by configuring end test bearings and two middle test bearings, and loads axial and radial loads on the test bearings. During the test, the working condition lubrication mode can be simulated, and the operating stability can be maintained to prevent unbalanced loading.

[0006] In order to achieve the above-mentioned purpose, on the one hand, the technical solution provided by the utility model is a device for simulating the working conditions of bearings to conduct durability and dry running tests, including a housing, a main shaft, a first end sleeve, a first universal square iron, a middle bushing, a radial load loading end, a bushing, a second end sleeve, a second universal square iron, a vertical plate and an axial load loading end; the main shaft is installed on the housing, and the main shaft includes a first mounting part, a second mounting part, a third mounting part and a fourth mounting part arranged along the length direction of the main shaft, the first mounting part is installed with an end test bearing, the second mounting part and the third mounting part are each installed with a middle test bearing, and the fourth mounting part is installed with a test bearing; The first end sleeve is sleeved on the outer ring of the end test bearing and abuts against the end face of the outer ring of the end test bearing; the first universal square iron is sleeved on the outer diameter of the first end sleeve and abuts against the end face of the first end sleeve; the middle sleeve is sleeved on the outer rings of the two middle test bearings; the radial load loading end abuts against the middle sleeve to transfer the radial load to the test bearing through the two middle test bearings and the main shaft in sequence; the sleeve is sleeved on the outer ring of the test bearing and abuts against the end face of the outer ring of the test bearing, and the sleeve is evenly provided with a plurality of oil holes in the circumferential direction, and the oil holes are connected to the lubricating oil tank; the second end sleeve is sleeved on the sleeve and abuts against the end face of the sleeve;

[0007] The second universal square iron sleeve is arranged on the outer diameter of the second end sleeve and abuts against the end face of the second end sleeve; the vertical plate abuts against the end face of the second universal square iron; the axial load loading end abuts against the vertical plate to transfer the axial load to the test bearing through the second universal square iron, the second end sleeve and the bushing in sequence.

[0008] Furthermore, the shell is provided with a first oil supply channel for supplying lubricating oil to the end test bearings; the shell is provided with a second oil supply channel for supplying lubricating oil to the two middle test bearings; and the shell is provided with a third oil supply channel for supplying lubricating oil to the test bearings.

[0009] Furthermore, the middle bushing is provided with an oil inlet hole, one end of which is connected to the second oil supply channel, and the other end of which is connected to the cavity between the two middle test bearings to provide a channel for lubricating oil to enter the two middle test bearings.

[0010] Furthermore, the first oil supply passage is connected to the cavity between the inner wall of the housing and the end test bearing to provide a passage for lubricating oil to enter the end test bearing.

[0011] Furthermore, a first end cover is detachably fixed to one end of the main shaft, and the first end cover abuts against an inner ring end face of the end test bearing.

[0012] Furthermore, a second end cover is detachably fixed to the other end of the main shaft, and the second end cover abuts against the inner ring end surface of the test bearing.

[0013] Furthermore, there is an oil gap between the second end sleeve and the second end cover, and the second end sleeve is provided with an oil inlet channel and an oil return channel. One end of the oil inlet channel is connected to the third oil supply channel, and the other end of the oil inlet channel is connected to the oil hole to allow lubricating oil to enter the test bearing.

[0014] Furthermore, an oil drain groove is provided at the bottom of the shell, and the oil drain groove is connected to the lubricating oil tank.

[0015] On the other hand, the technical solution provided by the utility model is a method for simulating the working conditions of a bearing to conduct durability and dry-running tests, using a device for simulating the working conditions of a bearing to conduct durability and dry-running tests as described above, including an axial load loading method and a radial load loading method;

[0016] The axial load loading method includes applying the axial load to the second end sleeve and the bushing through the axial load loading end of the oil cylinder piston, applying the axial load to the test bearing, fixing the first end sleeve, and the end test bearing bearing the axial load through the reaction force, and conducting the test by simulating the working condition load spectrum;

[0017] The radial load loading method includes applying the radial load to the middle bushing from the radial load loading end through the oil cylinder piston, transmitting it to the main shaft through two middle test bearings, the main shaft transmitting the radial load to the test bearing and the end test bearings, and the test bearings and the end test bearings at both ends jointly bear the radial load through reaction force.

[0018] A method for testing the durability and dry running performance of a bearing under simulated working conditions is provided, wherein the device for testing the durability and dry running performance of a bearing under simulated working conditions is used, and the method includes a durability test method and a dry running test method.

[0019] The durability test method includes

[0020] The end test bearings and two middle test bearings are supplied with oil through the first oil supply channel and the second oil supply channel, and the test bearings are supplied with oil through the third oil supply channel to simulate the working load and speed for durability test;

[0021] The dry running test method includes

[0022] Oil is supplied to the end test bearings and two middle test bearings through the first oil supply channel and the second oil supply channel. The third oil supply channel is cut off to cut off the oil to the test bearings, and a dry running test is carried out under simulated working load and speed.

[0023] The beneficial effects of the utility model are as follows: four mounting parts are provided for respectively mounting the end test bearings, two middle test bearings, and the test bearing, forming a relatively balanced state on the left and right sides, so as to improve the stability of the operation of the device during the test and prevent unbalanced loads; a radial load loading end and an axial load loading end are provided, so that the same device can be used to apply radial and axial loads to the test bearing; and a plurality of oil holes are evenly opened around the circumference of the bushing, which are connected to the lubricating oil tank to introduce lubricating oil into the test bearing; the working condition lubrication method can be simulated during the test, and the test result is relatively accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a device for simulating bearing working conditions to perform durability and dry-running tests in one embodiment of the utility model;

[0025] Figure 2 This is a schematic structural diagram of a square iron, a first universal component, in an embodiment of the utility model;

[0026] Figure 3 It is a structural schematic diagram of a device for simulating bearing working conditions to perform durability and dry-running tests in another embodiment of the utility model;

[0027] Figure 4 for Figure 1 A partial enlarged view of

[0028] In the figure:

[0029] 1. Shell, 1.1. First oil supply channel, 1.2. Second oil supply channel, 1.3. Third oil supply channel, 1.4. Oil drain groove,

[0030] 2. Main shaft, 2.1. First mounting part, 2.2. Second mounting part, 2.3. Third mounting part, 2.4. Fourth mounting part,

[0031] 3. The first end sleeve,

[0032] 4. The first universal piece is square iron.

[0033] 5. Middle bushing, 5.1. Oil inlet hole,

[0034] 6. Radial load loading end,

[0035] 7. Bushing, 7.1. Oil hole,

[0036] 8. Second end sleeve, 8.1. Oil inlet channel, 8.2. Oil return channel,

[0037] 9. The second universal part is square iron.

[0038] 10. Vertical board,

[0039] 11. Axial load loading end,

[0040] 12. The first end cover,

[0041] 13. The second end cover,

[0042] 14. Lubricating oil tank,

[0043] A, end test bearing, B1, B2, middle test bearing, C, test bearing. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0045] See also Figure 1 On the one hand, the technical solution provided by the utility model is a device for simulating bearing working conditions to conduct durability and dry-running tests, which is used to simulate bearing working conditions to test a test bearing C, and includes a housing 1, a main shaft 2, a first end sleeve 3, a first universal square iron 4, a middle bushing 5, a radial load loading end 6, a bushing 7, a second end sleeve 8, a second universal square iron 9, a vertical plate 10 and an axial load loading end 11.

[0046] See also Figure 1 , Figure 2 and Figure 4, the main shaft 2 is installed on the housing 1, and the main shaft is connected to the driving device to drive the main shaft 2 to rotate when the test is carried out. In this embodiment, the main shaft 2 is connected to the belt transmission mechanism, and the motor drives the main shaft 2 to rotate. The main shaft 2 includes a first mounting part 2.1, a second mounting part 2.2, a third mounting part 2.3 and a fourth mounting part 2.4 arranged along the length direction of the main shaft 2. The first mounting part 2.1 is installed with an end test bearing A, the second mounting part 2.2 and the third mounting part 2.3 are each installed with a middle test bearing B1, B2, and the fourth mounting part 2.4 is used to install the test bearing C. The first end sleeve 3 is sleeved on the outer ring of the end test bearing A and abuts against the end face of the outer ring of the end test bearing A; the first universal square iron 4 is sleeved on the outer diameter of the first end sleeve 3 and abuts against the end face of the first end sleeve 3, and the end face of the first universal square iron 4 abuts against the inner wall of the housing 1. The middle bushing 5 is sleeved on the outer rings of the two middle test bearings B1 and B2; the radial load loading end 6 abuts against the middle bushing 5, so as to transfer the radial load to the test bearing C through the two middle test bearings B1 and B2 and the main shaft 2 in sequence; the bushing 7 is sleeved on the outer ring of the test bearing C and abuts against the outer ring end face of the test bearing C, and the bushing 7 is evenly provided with multiple oil holes 5.1 in the circumferential direction; the second end sleeve 8 is sleeved on the bushing 7 and abuts against the end face of the bushing 7; the second universal square iron 9 is sleeved on the outer diameter of the second end sleeve 8 and abuts against the end face of the second end sleeve 8; the vertical plate 10 abuts against the end face of the second universal square iron 9; the axial load loading end 11 abuts against the vertical plate 10, so as to transfer the axial load to the test bearing C through the second universal square iron 9, the second end sleeve 8 and the bushing 7 in sequence.

[0047] The above-mentioned device for simulating bearing working conditions to conduct durability and dry-running tests is provided with four installation parts, which respectively install the end test bearing A, two middle test bearings B1, B2 and the test bearing C, forming a relatively balanced state on the left and right to improve the stability of the device operation during the test. A radial load loading end 6 and an axial load loading end 11 are provided, and the same equipment can be used to apply radial and axial loads to the test bearing C. In addition, a plurality of oil holes 5.1 are evenly opened in the circumference of the bushing 7, and the oil holes 5.1 are connected to the lubricating oil tank 14 to introduce lubricating oil into the test bearing C. The working condition lubrication method can be simulated during the test, and the test results are relatively accurate and reliable.

[0048] See also Figure 3 and Figure 4 In one embodiment, the housing 1 is provided with a first oil supply passage 1.1 for supplying lubricating oil to the end test bearing A; the housing 1 is provided with a second oil supply passage 1.2 for supplying lubricating oil to the two middle test bearings B1 and B2; the housing 1 is provided with a third oil supply passage 1.3 for supplying lubricating oil to the test bearing C.

[0049] It should be noted that in this embodiment, channels for providing lubricating oil to the end test bearing A, the middle test bearings B1, B2 and the test bearing C are respectively opened on the housing 1, namely, the first oil supply channel 1.1, the second oil supply channel 1.2 and the third oil supply channel 1.3, so that the four bearings can be lubricated separately and independently, and each bearing can be fully lubricated as much as possible, and mutual influence can be avoided. When the dry running test is performed, if the test bearing C does not need to be lubricated under the test conditions, it is only necessary to cut off the passage from the lubricating oil tank 14 to the third oil supply channel 1.3, without cutting off the oil of the entire bearing, and the operation of other test bearings will not be affected, so that the flexibility of the device is greatly improved, more working conditions can be simulated, and the scope of application is wider.

[0050] The specific process of the bearing dry running test is as follows: the first oil supply channel 1.1 and the second oil supply channel 1.2 supply oil to the end test bearing A and the two middle test bearings B1 and B2 normally, and the third oil supply channel 1.3 is cut off, and the oil cut-off test is recorded, and this time is set as the start time of the oil cut-off test T=T1=0; within 5 seconds, the oil supply to the test bearing C is completely cut off, and the test is carried out at a simulated working load and speed, and the test time runs to T2=(T1+1765) seconds; from T2, the test load is reduced, the speed is increased, and the bearing self-rotation state is simulated, and the test is carried out for 25 seconds; the transition state is completed in the shortest possible time. The test bearing is in one state at this stage, and the running time (excluding the transition state) is 10 seconds. At this time, the dry running test has accumulated to 30 minutes, that is, the bearing has passed the 30-minute dry running test assessment, and the test can be stopped.

[0051] In one embodiment, the middle bushing 5 is provided with an oil inlet hole 5.1, one end of the oil inlet hole 5.1 is connected to the second oil supply channel 1.2, and the other end of the oil inlet hole 5.1 is connected to the cavity between the two middle test bearings B1 and B2 to provide a channel for lubricating oil to enter the two middle test bearings B1 and B2.

[0052] In one embodiment, the first oil supply passage 1 . 1 is connected to the cavity between the inner wall of the housing 1 and the end test bearing A, so as to provide a passage for the lubricating oil to enter the end test bearing A.

[0053] In one embodiment, a first end cover 12 is detachably fixed to one end of the main shaft 2 , and the first end cover 12 abuts against the inner ring end surface of the end test bearing A.

[0054] In one embodiment, a second end cover 13 is detachably fixed to the other end of the main shaft 2 , and the second end cover 13 abuts against the inner ring end surface of the test bearing C.

[0055] In one embodiment, there is an oil gap between the second end sleeve 8 and the second end cover 13. The second end sleeve 8 is provided with an oil inlet channel 8.1 and an oil return channel 8.2. One end of the oil inlet channel 8.1 is connected to the third oil supply channel 1.3, and the other end of the oil inlet channel 8.1 is connected to the oil hole 5.1, so that the lubricating oil can enter the test bearing C.

[0056] In one embodiment, an oil drain groove 1.4 is provided at the bottom of the housing 1, and the oil drain groove 1.4 is connected to the lubricating oil tank 14. In the specific configuration, an oil groove is designed at the bottom of the housing 1, and an oil hole is provided at a suitable position inside the oil groove, and the lubricating oil returns to the lubricating oil tank 14 by gravity. With such a configuration, the lubricating oil entering the device can be discharged relatively smoothly, so that new lubricating oil can be introduced into the device.

[0057] On the other hand, the technical solution provided by the utility model is a method for simulating the working conditions of a bearing to conduct durability and dry-running tests, using a device for simulating the working conditions of a bearing to conduct durability and dry-running tests as described above, including an axial load loading method and a radial load loading method;

[0058] The axial load loading method includes applying the axial load to the second end sleeve 8 and the bushing 7 through the axial load loading end 11 of the oil cylinder piston, applying the axial load to the test bearing C, fixing the first end sleeve 3, and the end companion test bearing A bearing the axial load through the reaction force, and conducting the test by simulating the working load spectrum;

[0059] The radial load loading method includes applying the radial load to the middle bushing 5 through the radial load loading end 6 via the cylinder piston, and transmitting it to the main shaft 2 via the two middle test bearings B1 and B2. The main shaft 2 transmits the radial load to the test bearing C and the end test bearing A. The test bearings C and the end test bearings A at both ends jointly bear the radial load through the reaction force.

[0060] In addition, the technical solution provided by the utility model is a method for simulating bearing working conditions to conduct durability and dry-running tests, which uses the above-mentioned device for simulating bearing working conditions to conduct durability and dry-running tests, including a durability test method and a dry-running test method.

[0061] The durability test method includes

[0062] The end test bearing A and the two middle test bearings B1 and B2 are supplied with oil through the first oil supply channel 1.1 and the second oil supply channel 1.2, and the test bearing C is supplied with oil through the third oil supply channel to simulate the working load and speed for durability test;

[0063] The dry running test method includes

[0064] The end test bearing A and the two middle test bearings B1 and B2 are supplied with oil through the first oil supply channel 1.1 and the second oil supply channel 1.2. The third oil supply channel is cut off to cut off the oil supply to the test bearing C, and a dry running test is carried out under simulated working load and speed.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0066] In addition, the terms "first" and "second" are used for descriptive purposes only 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" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0067] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

Claims

1. A device for simulating bearing working conditions to conduct durability and dry running tests, characterized in that: include case; A main shaft is mounted on the housing, the main shaft comprises a first mounting portion, a second mounting portion, a third mounting portion and a fourth mounting portion arranged along the length direction of the main shaft, the first mounting portion is mounted with an end test bearing, the second mounting portion and the third mounting portion are each mounted with a middle test bearing, and the fourth mounting portion is used to mount a test bearing; A first end sleeve, which is sleeved on the outer ring of the end test bearing and abuts against the end face of the outer ring of the end test bearing; A first universal square iron is sleeved on the outer diameter of the first end sleeve and abuts against the end surface of the first end sleeve; Middle bushing, which is sleeved on the outer rings of the two middle companion bearings; The radial load loading end abuts against the middle bushing to sequentially transmit the radial load to the test bearing through two middle companion test bearings and the main shaft; A bushing is sleeved on the outer ring of the test bearing and abuts against the outer ring end face of the test bearing. The bushing is evenly provided with a plurality of oil holes in the circumferential direction, and the oil holes are connected to the lubricating oil tank; A second end sleeve is sleeved on the bushing and abuts against an end surface of the bushing; A second universal square iron is sleeved on the outer diameter of the second end sleeve and abuts against the end surface of the second end sleeve; A vertical plate abutting against the end surface of the square iron of the second universal member; The axial load loading end abuts against the vertical plate to transmit the axial load to the test bearing through the second universal square iron, the second end sleeve and the bushing in sequence.

2. The device for simulating bearing working conditions to conduct durability and dry-running tests according to claim 1, characterized in that: The shell is provided with a first oil supply channel for supplying lubricating oil to the end test bearings; the shell is provided with a second oil supply channel for supplying lubricating oil to the two middle test bearings; the shell is provided with a third oil supply channel for supplying lubricating oil to the test bearings.

3. The device for simulating bearing working conditions to conduct durability and dry running tests according to claim 2, characterized in that: The middle bushing is provided with an oil inlet hole, one end of which is connected to the second oil supply channel, and the other end of which is connected to the cavity between the two middle test bearings to provide a channel for lubricating oil to enter the two middle test bearings.

4. The device for simulating bearing working conditions to conduct durability and dry-running tests according to claim 2, characterized in that: The first oil supply passage is communicated with the cavity between the inner wall of the housing and the end test bearing to provide a passage for lubricating oil to enter the end test bearing.

5. The device for simulating bearing working conditions to conduct durability and dry-running tests according to claim 2, characterized in that: A first end cover is detachably fixed to one end of the main shaft, and the first end cover abuts against the inner ring end surface of the end companion bearing.

6. The device for simulating bearing working conditions to conduct durability and dry-running tests according to claim 5, characterized in that: A second end cover is detachably fixed to the other end of the main shaft, and the second end cover abuts against the inner ring end surface of the test bearing.

7. The device for simulating bearing working conditions to conduct durability and dry-running tests according to claim 6, characterized in that: There is an oil gap between the second end sleeve and the second end cover. The second end sleeve is provided with an oil inlet channel and an oil return channel. One end of the oil inlet channel is connected to the third oil supply channel, and the other end of the oil inlet channel is connected to the oil hole to allow lubricating oil to enter the test bearing.

Images