Bearing testing device

Abstract

The utility model provides a bearing test device, relates to the technical field of test equipment, and solves the technical problem that the bearing test equipment in the prior art is insufficient in simulating the actual use condition of a bearing. The device is technically characterized by comprising a hydraulic station, a loading oil cylinder, an eccentric motor and a test bearing, the hydraulic station is provided with a first pump motor set and a second pump motor set which are independently arranged and are respectively connected with a front cavity and a rear cavity of the loading oil cylinder through pipelines; the end part of a piston of the loading oil cylinder is fixedly connected with an external shell of the test bearing; two sides of the test bearing are respectively provided with a support bearing, and the optical axis respectively passes through the support bearings and the test bearing. And an output shaft of the eccentric motor is fixedly connected with the optical shaft. The method has the beneficial effects that the actual use condition of the bearing can be well simulated, and various parameters of the durability of the bearing are more accurate and scientific.

Description

Technical Field

[0001] The utility model relates to the technical field of testing equipment, in particular to a bearing testing device. Background Art

[0002] Bearings are an important component in modern mechanical equipment. Its main function is to support the mechanical rotating body, reduce its friction coefficient during movement, and ensure its rotation accuracy. During use, the bearing's running resistance will increase due to factors such as wear, rust or impurities, so the bearing needs to be tested for durability before it is put into production. However, as far as the existing bearing performance testing device is concerned, when conducting the durability test, it measures the running resistance of the bearing after driving the bearing to rotate for a certain period of time, thereby obtaining various parameters of the bearing durability performance; or it obtains various parameters of the bearing durability performance by combining axial reciprocating rotation and radial loading; the present disclosure adopts another structure to test the bearing durability, and the overall structure can be more in line with the actual use conditions of the bearing than the traditional testing equipment. Utility Model Content

[0003] The utility model aims to solve the technical problem that the bearing testing equipment in the prior art cannot adequately imitate the actual use conditions of the bearing, and provides a bearing testing device.

[0004] In order to solve the above technical problems, the technical solutions of the present utility model are as follows:

[0005] A bearing test device comprises: a hydraulic station, a loading cylinder, an eccentric motor and a test bearing;

[0006] The hydraulic station has two sets of independently arranged first pump-motor groups and second pump-motor groups, which are respectively connected to the front chamber and the rear chamber of the loading cylinder through pipelines;

[0007] The piston end of the loading cylinder is fixedly connected to the outer shell of the test bearing;

[0008] There are support bearings on both sides of the test bearing, and the optical axis passes through the support bearings and the test bearing respectively;

[0009] The output shaft of the eccentric motor is fixedly connected to the optical axis.

[0010] Furthermore, the hydraulic station also includes a high-pressure filter, a relief valve, a one-way valve and an accumulator, which are arranged in a row along the pipeline; the relief valve is located in a bypass position between the high-pressure filter and the one-way valve.

[0011] Furthermore, the rear cavity of the loading cylinder has two interconnected oil ports, one of which is connected to the one-way valve through a pipeline, and the other is connected to the first proportional valve group through a pipeline;

[0012] The front chamber of the loading oil cylinder is connected to the second proportional valve group through a pipeline, and the second proportional valve group is connected to the one-way valve on the oil circuit of the second pump-motor group through a pipeline.

[0013] Furthermore, a tension and compression sensor is provided at the end of the piston rod of the loading cylinder, and the tension and compression sensor is hinged to the outer shell of the test bearing.

[0014] The utility model has the following beneficial effects:

[0015] The utility model relates to a bearing test device. An eccentric motor drives the test bearing to rotate at high speed. Combined with the continuous thrust of the loading cylinder, it can well simulate the actual use conditions of the bearing and obtain various parameters of the bearing durability performance more accurately and scientifically.

[0016] The hydraulic oil first passes through the high-pressure filter before entering the relief valve, which can make the hydraulic oil entering the relief valve cleaner and greatly reduce the failure rate of the relief valve;

[0017] The two proportional valve groups control the pressure of the front and rear chambers of the loading cylinder respectively. The closed-loop control is formed through the feedback of the tension and pressure sensors, which enables the test bearing to better simulate the actual working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.

[0019] Figure 1 This is a schematic diagram of a bearing test device of the present invention;

[0020] Figure 2 This is a three-dimensional schematic diagram of a hydraulic station of a bearing test device of the present invention;

[0021] Figure 3 The utility model is a structural schematic diagram of a loading cylinder of a bearing test device.

[0022] The reference numerals in the figures indicate:

[0023] 1. Hydraulic station; 101. First pump-motor group; 102. Second pump-motor group; 103. High-pressure filter; 104. Overflow valve; 105. Check valve; 106. Accumulator; 2. Loading cylinder; 201. First proportional valve group; 202. Second proportional valve group; 203. Tension and compression sensor; 3. Eccentric motor; 4. Test bearing. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 3 , a bearing test device, comprising: a hydraulic station 1, a loading cylinder 2, an eccentric motor 3 and a test bearing 4;

[0026] The hydraulic station 1 has two sets of independently arranged first pump-motor groups 101 and second pump-motor groups 102, which are respectively connected to the front chamber and the rear chamber of the loading cylinder 2 through pipelines;

[0027] The piston end of the loading cylinder 2 is fixedly connected to the outer shell of the test bearing 4;

[0028] There are support bearings on both sides of the test bearing 4, and the optical axis passes through the support bearings and the test bearing 4 respectively;

[0029] The output shaft of the eccentric motor 3 is fixedly connected to the optical axis.

[0030] Working principle: The eccentric motor 3 drives the optical shaft to rotate at the set speed, and the test bearing 4 will be subjected to two force modes: when the optical shaft applies a downward radial force to the test bearing 4, the test bearing 4 applies pressure to the piston of the loading cylinder 2 through the external shell. At this time, due to the pressure of the hydraulic oil in the rear chamber of the loading cylinder 2, the loading cylinder 2 applies a reverse thrust to the test bearing; when the optical shaft applies an upward radial force to the test bearing 4, the test bearing 4 applies a pulling force to the piston of the loading cylinder 2 through the external shell. At this time, due to the pressure of the hydraulic oil in the front chamber of the loading cylinder 2, the loading cylinder 2 applies a reverse pulling force to the test bearing. This is repeated, which can well simulate the actual working conditions of the bearing, and make the various parameters of the bearing durability performance more accurate and scientific.

[0031] The hydraulic station 1 further includes a high-pressure filter 103 , a relief valve 104 , a one-way valve 105 and an accumulator 106 . The high-pressure filter 103 , the one-way valve 105 and the accumulator 106 are arranged in a row along the pipeline; the relief valve 104 is in a bypass position between the high-pressure filter 103 and the one-way valve 105 .

[0032] Specifically, the hydraulic oil first passes through the high-pressure filter 103 and then enters the relief valve 104, which can make the hydraulic oil entering the relief valve 104 cleaner, greatly reduce the failure rate of the relief valve 104, make the entire system work stably, and extend the service life of the test device.

[0033] The rear cavity of the loading cylinder 2 has two interconnected oil ports, one of which is connected to the one-way valve 105 through a pipeline, and the other is connected to the first proportional valve group 201 through a pipeline;

[0034] The front chamber of the loading cylinder 2 is connected to the second proportional valve group 202 through a pipeline, and the second proportional valve group 202 is connected to the one-way valve on the oil circuit of the second pump-motor group 102 through a pipeline.

[0035] Specifically, when the optical axis applies a downward radial force to the test bearing 4, the test bearing 4 applies pressure to the piston of the loading cylinder 2 through the external housing, and the pressure in the rear chamber of the loading cylinder 2 increases. The first proportional valve group 201 releases the excess pressure back to the oil tank, so that the pressure in the rear chamber remains stable; the pressure in the rear chamber of the loading cylinder 2 increases, and the one-way valve 105 can prevent the hydraulic oil from flowing back to the first pump motor group 101, thereby protecting the first pump motor group 101; the accumulator 106 can absorb the sudden increase in pressure to prevent the impact and vibration of the system caused by the slow oil discharge speed of the first proportional valve group 201; as the piston of the loading cylinder 2 moves toward the rear chamber, the pressure in the front chamber decreases, and the second pump motor group 102 will quickly replenish the hydraulic oil to maintain the pressure in the front chamber; the hydraulic oil in the accumulator will also quickly replenish the hydraulic oil to the front chamber to make up for the deficiency of the second pump motor group 102;

[0036] The test bearing 4 applies a pulling force to the piston of the loading cylinder 2 through the external housing, the pressure in the rear chamber of the loading cylinder 2 decreases, and the pressure in the front chamber increases, and the second proportional valve group 202 releases the excess pressure back to the oil tank, so that the pressure in the front chamber remains stable; the pressure in the front chamber of the loading cylinder 2 increases, and the one-way valve can prevent the hydraulic oil from flowing back to the second pump motor group 102, thereby protecting the second pump motor group 102; the accumulator can absorb the sudden increase in pressure to prevent the impact and vibration of the system caused by the slow oil discharge speed of the second proportional valve group 202; as the piston of the loading cylinder 2 moves toward the front chamber, the pressure in the rear chamber decreases, and the first pump motor group 101 will quickly replenish the hydraulic oil to maintain the pressure in the rear chamber; the hydraulic oil in the accumulator 106 will also quickly replenish the hydraulic oil to the rear chamber to make up for the deficiency of the first pump motor group 101.

[0037] The end of the piston rod of the loading cylinder 2 is provided with a tension and compression sensor 203 , which is hinged to the outer housing of the test bearing 4 .

[0038] Specifically, a tension and compression sensor 203 is provided, and cooperates with the first proportional valve group 201 and the second proportional valve group 202 to form a closed-loop control, so that the test data is more accurate and scientific; the articulated connection method can make the loading cylinder 2 adapt to the test action of the bearing during work, and the sealing ring of the loading cylinder 2 can be protected from the deflection force, thereby ensuring the normal service life of the loading cylinder 2.

[0039] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A bearing testing device, characterized in that: include: Hydraulic station (1), loading cylinder (2), eccentric motor (3) and test bearing (4); The hydraulic station (1) has two sets of independently arranged first pump-motor groups (101) and second pump-motor groups (102), which are respectively connected to the front cavity and the rear cavity of the loading cylinder (2) through pipelines; The piston end of the loading cylinder (2) is fixedly connected to the outer shell of the test bearing (4); There are support bearings on both sides of the test bearing (4), and the optical axis passes through the support bearings and the test bearing (4) respectively; The output shaft of the eccentric motor (3) is fixedly connected to the optical axis.

2. A bearing testing device according to claim 1, characterized in that: The hydraulic station (1) further comprises a high-pressure filter (103), a relief valve (104), a one-way valve (105) and an accumulator (106), wherein the high-pressure filter (103), the one-way valve (105) and the accumulator (106) are arranged in a row along the pipeline; the relief valve (104) is located in a bypass position between the high-pressure filter (103) and the one-way valve (105).

3. A bearing testing device according to claim 1, characterized in that: The rear cavity of the loading oil cylinder (2) has two interconnected oil ports, one of which is connected to a one-way valve (105) through a pipeline, and the other is connected to a first proportional valve group (201) through a pipeline; The front chamber of the loading oil cylinder (2) is connected to the second proportional valve group (202) through a pipeline, and the second proportional valve group (202) is connected to the one-way valve on the oil circuit of the second pump motor group (102) through a pipeline.

4. A bearing testing device according to claim 3, characterized in that: The piston rod end of the loading oil cylinder (2) is provided with a tension and compression sensor (203), and the tension and compression sensor (203) is hinged to the outer shell of the test bearing (4).

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