Dustproof test tool for axle box bearing of high-speed rail

Abstract

The utility model provides a dustproof test tool for a high-speed rail axle box bearing, which comprises a tool shaft and a test bearing arranged on the tool shaft, a radial loading sleeve is sleeved outside the test bearing, and a radial loading seat for radial loading is connected outside the radial loading sleeve. The radial loading sleeve is axially and outwards connected with an axial loading sleeve through a connecting sleeve, an axial loading seat used for axial loading is arranged in the axial direction of the axial loading sleeve, the connecting sleeve is provided with a test cavity used for a dustproof test, one end of the test cavity is correspondingly communicated with the test bearing, and the other end of the test cavity is communicated with the test bearing. The test cavity is filled with dust, and the test bearing rotates under the stress condition under the combined action of axial loading and radial loading to carry out a dustproof test.

Description

Technical Field

[0001] The utility model relates to a dustproof test tool for a high-speed railway axle box bearing. Background Art

[0002] In the prior art, the bearings used on the axles are axle box bearings. When the train is running, the friction between the wheels and the tracks, as well as the high-speed running, will cause dust to be raised on the railway line. The train axle box bearings are installed inside the axial box body, with one side completely sealed and the other side gap sealed. The side with the gap seal is close to the wheel. In actual application, dust will enter the inside of the axial box body. If the dustproof performance of the bearing is not up to standard, it will cause damage to the bearing and affect the safety of train operation. However, there is currently a lack of equipment to directly test the dustproof performance of the high-speed rail axle box bearings. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a high-speed railway axle box bearing dustproof test tool.

[0004] To achieve the above-mentioned purpose, the utility model provides a high-speed railway axle box bearing dustproof test tool, including a tool shaft, a test bearing arranged on the tool shaft, the test bearing outer shell is provided with a radial loading sleeve, the radial loading sleeve is externally connected with a radial loading seat for radial loading, the radial loading sleeve is axially connected to an axial loading sleeve through a connecting sleeve toward the outside, an axial loading seat for axial loading is arranged in the axial direction of the axial loading sleeve, the connecting sleeve is provided with a test cavity for dustproof test, one end of the test cavity is connected to the test bearing, the test cavity is filled with dust, and the test bearing is rotated under force conditions under the combined action of axial loading and radial loading to perform a dustproof test.

[0005] Furthermore, an air inlet for introducing compressed air is provided at the bottom of the test chamber, and the air inlet allows compressed air to roll up dust. An air outlet is provided at the top of the test chamber, and a gas silencer for exhaust is installed at the air outlet, and the gas is exhausted through the gas silencer to prevent dust from being discharged.

[0006] Furthermore, the radially inward end of the connecting sleeve is connected and installed with the radial loading sleeve, and the end includes a first connecting portion connected to the axial end surface of the radial loading sleeve and a second connecting portion adapted to be plugged into the inner edge of the radial loading sleeve, and the end of the second connecting portion abuts against the outer ring of the test bearing.

[0007] Furthermore, a positioning mechanism for positioning the test bearing and the companion test bearing is provided on the tooling shaft, and the positioning mechanism includes a first positioning member and a second positioning member arranged at both axial ends of the test bearing, the first positioning member is fixedly installed corresponding to the axial outward end of the positioning shaft, and the second positioning member is extended along the outer wall of the tooling shaft to form a positioning installation space for installing the companion test bearing.

[0008] Furthermore, the radial loading sleeve is provided with a temperature measuring hole corresponding to the experimental bearing test.

[0009] Furthermore, a sealing mechanism is provided between the second connection portion and the inner edge of the radial loading sleeve, and the sealing mechanism comprises a flange provided on the second connection portion, an annular groove provided on the inner edge of the radial loading sleeve corresponding to the flange, and a sealing ring is provided between the flange and the annular groove.

[0010] The beneficial effects of the utility model are as follows: the structure of the utility model performs radial loading on the radial loading sleeve and the radial loading seat, performs axial loading on the axial loading sleeve and the axial loading seat, and shakes up and down and left and right, thereby simulating the actual operating state of the wheel during the operation of the high-speed railway wheelset, as well as the high-frequency vibration. Dust is placed inside the test cavity through the test cavity in the connecting sleeve. Under the action of gravity, the dust will gather at the bottom. Compressed air is introduced to blow up the dust so that it fills the entire cavity. The test bearing sealing ring contacts the dust, and the test bearing rotates under stress conditions. At this time, the simulation result is closer to the actual working condition, so as to judge the dustproof performance of the bearing, realize the test requirements of the dustproof performance at a very low cost, improve the credibility of the detection, and has the characteristics of simple structure and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure in an embodiment of the utility model;

[0012] Figure 2 It is a schematic diagram of the cross-sectional structure in an embodiment of the utility model;

[0013] Figure 3 for Figure 2 A schematic diagram of the enlarged structure in FIG. DETAILED DESCRIPTION

[0014] The following is a further description of the embodiments of the utility model in conjunction with the accompanying drawings: as shown in the figure, the high-speed railway axle box bearing dustproof test tool comprises a tool shaft 1, a test bearing 2 arranged on the tool shaft 1, the test bearing 2 is provided with a radial loading sleeve 3 on the outer sleeve, the radial loading sleeve 3 is externally connected to a radial loading seat 4 for radial loading, the radial loading sleeve 3 is axially connected to an axial loading sleeve 5 through a connecting sleeve 7 facing outward, the axial direction of the axial loading sleeve 5 is provided with an axial loading seat 6 for axial loading, the connecting sleeve 7 is provided with a test cavity 8 for dustproof test, one end of the test cavity 8 is connected to the test bearing 2, the test cavity 8 is filled with dust, and the test bearing 2 is rotated under force conditions under the combined action of axial loading and radial loading to perform a dustproof test.

[0015] The bottom of the test chamber 8 is provided with an air inlet 9 for introducing compressed air, and the air inlet 9 introduces compressed air to roll up dust. The upper part of the test chamber 8 is provided with an air outlet 10, and the air outlet 10 is equipped with a gas muffler for exhaust, and exhaust is exhausted through the gas muffler to prevent dust from being discharged. The air inlet 9 is at the bottom of the test chamber 8, which is convenient for better rolling up dust for testing under the dust deposition state. The main function of the gas muffler is to reduce the noise during gas flow, while protecting the equipment and maintaining the stability of air flow, and achieving noise reduction effect by blocking, dispersing and dissipating the energy of gas flow. It is conducive to absorbing direct sound waves and reducing the generation of echoes.

[0016] The radially inward end of the connecting sleeve 7 is connected and installed with the radial loading sleeve 3, and the end includes a first connecting portion 11 connected with the axial end surface of the radial loading sleeve 3, and a second connecting portion 12 adapted and plugged corresponding to the inner edge of the radial loading sleeve 3, and the end of the second connecting portion 12 abuts against the outer ring of the test bearing 2. The first connecting portion 11 and the second connecting portion 12 form an L shape.

[0017] The tooling shaft 1 is provided with a positioning mechanism for positioning the test bearing 2 and the accompanying test bearing, and the positioning mechanism includes a first positioning member 13 and a second positioning member 14 arranged at both axial ends of the test bearing 2, the first positioning member 13 is fixedly installed corresponding to the axial outward end of the positioning shaft, and the second positioning member 14 is extended along the outer wall of the tooling shaft 1 to form a positioning installation space 15 for the accompanying test bearing to be installed. The test bearing 2 is positioned and fixed by the first positioning member 13 and the second positioning member 14, and the first positioning member 13 and the second positioning member 14 are respectively abutted and limited with the end faces at both axial ends of the inner ring of the test bearing 2, and the extended end of the second positioning member 14 extends on the tooling shaft 1, and an installation space for the accompanying test bearing to be installed is formed between the other end of the tooling shaft 1 and the extended end.

[0018] The radial loading sleeve 3 is provided with a temperature measuring hole corresponding to the test bearing 2. The temperature sensor detects the temperature. When the temperature is abnormally high, the test is stopped to detect whether dust has entered the bearing. In this way, the dustproof performance of the bearing is judged, and the test requirements of the dustproof performance are achieved at a very low cost.

[0019] A sealing mechanism is provided between the second connection part 12 and the inner edge of the radial loading sleeve 3, and the sealing mechanism includes a flange 16 provided on the second connection part 12, and an annular groove provided on the inner edge of the radial loading sleeve 3 corresponding to the flange 16, and a sealing ring is provided between the flange 16 and the annular groove. By plugging the flange 16 and the annular groove and sealing therebetween with the sealing ring, dust is prevented from leaking through the connection between the second connection part 12 and the radial loading sleeve 3 during the dustproof test, and dust is prevented from getting stuck between the first connection part 11 and the radial loading sleeve 3 to increase friction, thereby improving the use effect.

[0020] The above embodiment is only one of the preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A high-speed railway axle box bearing dustproof test tool, characterized by: The utility model comprises a tooling shaft and a test bearing arranged on the tooling shaft, wherein a radial loading sleeve is arranged outside the test bearing, a radial loading seat for radial loading is connected to the outside of the radial loading sleeve, the radial loading sleeve is axially connected to an axial loading sleeve through a connecting sleeve toward the outside, an axial loading seat for axial loading is arranged in the axial direction of the axial loading sleeve, the connecting sleeve is provided with a test cavity for dustproof test, one end of the test cavity is connected to the test bearing, the test cavity is filled with dust, and the test bearing is rotated under force condition by the joint action of axial loading and radial loading to perform dustproof test.

2. The high-speed railway axle box bearing dustproof test tool according to claim 1 is characterized in that: An air inlet for introducing compressed air is provided at the bottom of the test chamber, and the compressed air is introduced into the air inlet to roll up dust. An air outlet is provided at the top of the test chamber, and a gas muffler for exhaust is installed at the air outlet. The gas is exhausted through the gas muffler and dust is prevented from being discharged.

3. The high-speed railway axle box bearing dustproof test tool according to claim 2 is characterized in that: The radially inward end of the connecting sleeve is connected and installed with the radial loading sleeve, and the end includes a first connecting portion connected to the axial end surface of the radial loading sleeve and a second connecting portion adapted and plugged into the inner edge of the radial loading sleeve, and the end of the second connecting portion abuts against the outer ring of the test bearing.

4. The high-speed railway axle box bearing dustproof test tool according to claim 3 is characterized by: The tooling shaft is provided with a positioning mechanism for positioning the test bearing and the companion test bearing. The positioning mechanism includes a first positioning member and a second positioning member arranged at both axial ends of the test bearing. The first positioning member is fixedly installed corresponding to the axial outward end of the positioning shaft, and the second positioning member is extended along the outer wall of the tooling shaft to form a positioning installation space for installing the companion test bearing.

5. The high-speed railway axle box bearing dustproof test tool according to claim 1 is characterized in that: The radial loading sleeve is provided with a temperature measuring hole corresponding to the test bearing test.

6. The high-speed railway axle box bearing dustproof test tool according to claim 3 is characterized by: A sealing mechanism is provided between the second connection portion and the inner edge of the radial loading sleeve. The sealing mechanism comprises a flange provided on the second connection portion and an annular groove provided on the inner edge of the radial loading sleeve corresponding to the flange. A sealing ring is provided between the flange and the annular groove.

Images