Micro-motion test bench for hydrogen embrittlement test of bearing

Abstract

A bearing hydrogen embrittlement test micro-motion test bench comprises a fixing seat, a shaft arranged in the middle of the fixing seat, test bearings installed on the shaft, a bearing seat connected to the outer side of the test bearings, an upper end cover and a lower end cover installed at the two ends of the bearing seat respectively, sealing gaskets arranged between the upper end cover and the bearing seat and between the lower end cover and the bearing seat, and a shaft sleeve arranged between the test bearings. The shaft is sleeved with the shaft sleeve, the outer side of the shaft sleeve is sleeved with a spring, the lower end of the shaft is connected with a lower locking nut, the upper end of the shaft is sleeved with a pressing block, the upper end of the pressing block is provided with an upper locking nut, the upper locking nut is connected to the upper end of the shaft, the pressing block is connected to the fixing base, and a sealing piece is arranged between the pressing block and the upper end cover. The bearing seat is provided with an air hole communicated with the test bearing, and the bearing seat is connected with a swing rod. According to the utility model, the inner ring of the test bearing is fixed, the outer ring of the test bearing swings at a certain angle in a hydrogen state, and the abrasion conditions of a bearing channel and a steel ball are observed, so that the test requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing testing, in particular to a micro-motion test bench for bearing hydrogen embrittlement test. Background Technique

[0002] The hydrogen embrittlement test is a test method for evaluating the brittle fracture of materials. It is mainly used to evaluate the brittle fracture tendency of materials when exposed to a hydrogen environment. Wind power equipment can generate hydrogen through the process of electrolyzing water, which is called wind power hydrogen production. Wind power hydrogen production uses the electricity generated by a wind farm to decompose water molecules through electrolysis to produce hydrogen and oxygen. This technology not only helps to reduce the dependence on fossil fuels but also can produce clean hydrogen energy.

[0003] Therefore, it is necessary to test the hydrogen embrittlement test of the bearing before it is installed in the wind power equipment. However, the existing test benches can only meet the life test of ordinary bearings and cannot perform the wear test of bearings in a hydrogen environment. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a micro-motion test bench for bearing hydrogen embrittlement test aiming at the above-mentioned deficiencies of the existing technology.

[0005] To solve the above technical problem, the technical scheme adopted by the utility model is:

[0006] A micro-motion test bench for bearing hydrogen embrittlement test, including a fixed seat. An installation area is arranged in the middle of the fixed seat. A shaft is arranged in the installation area. A test bearing is installed on the shaft. A bearing seat is connected to the outside of the test bearing. An upper end cover and a lower end cover are respectively installed at both ends of the bearing seat. A sealing gasket is arranged between the upper end cover and the lower end cover and the bearing seat. A shaft sleeve is arranged between the test bearings. The shaft sleeve is sleeved on the shaft. A spring is sleeved on the outside of the shaft sleeve. The lower end of the shaft is connected with a lower locking nut. A pressing block is sleeved on the upper end of the shaft. An upper locking nut is arranged at the upper end of the pressing block. The upper locking nut is connected to the upper end of the shaft. The pressing block is connected to the fixed seat. A sealing member is arranged between the pressing block and the upper end cover. An air hole is processed on the bearing seat and communicated with the test bearing. A swing rod is connected to the bearing seat.

[0007] Further, a circlip and a washer are respectively arranged on both sides of the spring. The circlip and the washer press the outer ring of the test bearing. Pressing rings are processed on the surfaces of the upper end cover and the lower end cover, and the pressing rings press the outer ring of the test bearing.

[0008] Further, the lower locking nut, the shaft sleeve and the pressing block press the inner ring of the test bearing.

[0009] Further, connection protrusions are arranged around the upper end of the pressing block. Screw holes are processed on the connection protrusions. The upper part of the fixed seat is connected to the screw holes of the connection protrusions through screws to fix the pressing block.

[0010] Further, an installation base is provided around the bottom of the fixed seat, and installation holes are provided on the installation base.

[0011] Further, the seal is a double-lip stainless steel oil seal. The outer side of the double-lip stainless steel oil seal is adhesively bonded to the upper end cover, and the inner side is sealed with the periphery of the pressing block through a sealing lip.

[0012] Compared with the prior art, for a bearing hydrogen embrittlement test micro-motion test bench of the present utility model, the inner ring of the test bearing is fixed. Under the hydrogen state, the outer ring of the test bearing swings at a certain angle, and the wear conditions of the bearing raceway and the steel balls are observed to meet the test requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a structural schematic diagram of the present utility model;

[0014] Figure 2 is a cross-sectional view inside the bearing seat of the present utility model;

[0015] Among them, 1. Fixed seat, 2. Shaft, 3. Test bearing, 4. Bearing seat, 5. Upper end cover, 6. Lower end cover, 7. Sealing gasket, 8. Sleeve, 9. Lower locking nut, 10. Pressing block, 11. Upper locking nut, 12. Spring, 13. Snap ring, 14. Washer, 15. Pressing ring, 16. Seal, 17. Air hole, 18. Swing rod, 101. Connecting protrusion, 111. Installation base. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions in the embodiments of the present utility model will be clearly and completely described below.

[0017] As Figure 1 and Figure 2 shown, a bearing hydrogen embrittlement test micro-motion test bench includes a fixed seat 1. An installation base 111 is provided around the bottom of the fixed seat 1, and installation holes are provided on the installation base 111 for installing the fixed seat 1 on the test bench. An installation area is provided in the middle of the fixed seat 1, a shaft 2 is provided in the installation area, two test bearings 3 are installed on the shaft 2, a bearing seat 4 is connected to the outside of the test bearings 3, an upper end cover 5 and a lower end cover 6 are respectively connected to both ends of the bearing seat 4, and the upper end cover 5 and the lower end cover 6 are fixed to the bearing seat 4 through installation screws around the periphery. A sealing gasket 7 is provided between the upper end cover 5 and the lower end cover 6 and the bearing seat 4. A sleeve 8 is provided between the test bearings 3, the sleeve 8 is sleeved on the shaft 2. A lower locking nut 9 is connected to the lower end of the shaft 8, a pressing block 10 is sleeved on the upper end of the shaft 2, an upper locking nut 11 is provided at the upper end of the pressing block 10, and the upper locking nut 11 is connected to the upper end of the shaft 2. By tightening the upper locking nut 11, the lower locking nut 9, the sleeve 8 and the pressing block 10 compress the inner ring of the test bearing 3.

[0018] The briquetting block 10 is connected to the fixed seat. In this embodiment, connection protrusions 101 are arranged around the upper end of the briquetting block 10, and screw holes are machined on the connection protrusions 101. Above the fixed seat 1, it is connected to the screw holes of the connection protrusions 101 through screws to fix the briquetting block 10.

[0019] A spring 12 is sleeved outside the bushing 8. A circlip 13 and a washer 14 are respectively arranged on both sides of the spring 12. Under the action of the spring 12, the circlip 13 and the washer 14 press against the outer ring of the test bearing 3. Pressing rings 15 are machined on the surfaces of the upper end cover 5 and the lower end cover 6, and the pressing rings 15 also press against the outer ring of the test bearing 3.

[0020] A seal 16 is arranged between the briquetting block 10 and the upper end cover 5. An air hole 17 is machined on the bearing seat 4 and communicates with the test bearing 3. Hydrogen is injected into the bearing seat 4 through the air hole 17, and sealed through the seal 16 and the gasket 7. In this embodiment, the seal 16 adopts a double-lip stainless steel oil seal. The outside of the double-lip stainless steel oil seal is adhesively bonded to the upper end cover 5, and the inside is sealed with the periphery of the briquetting block 10 through a sealing lip. A swing rod 18 is connected to the bearing seat 4.

[0021] During use, after injecting hydrogen through the air hole 17 and discharging the air in the test bearing 3, block the air hole 17 on the other side to maintain the hydrogen pressure. Drive the swing rod 18 through an external driving device to make the bearing seat swing slightly within a small range at a certain angle, and then take out the test shaft to observe the wear conditions of the rotating positions of the bearing raceway and the steel balls, and compare them with the positions in the test bearing 3 where no rotation has occurred.

[0022] The present utility model is not limited to the described embodiments. Those skilled in the art can still make some corrections or changes without departing from the spirit of the present utility model, that is, within the scope of disclosure. Therefore, the scope of protection of the rights of the present utility model shall be subject to the scope defined by the claims.

Claims

1. A fretting test bench for bearing hydrogen embrittlement test, characterized in that: It includes a fixed seat, an installation area is arranged in the middle of the fixed seat, a shaft is arranged in the installation area, a test bearing is installed on the shaft, a bearing seat is connected to the outside of the test bearing, an upper end cover and a lower end cover are respectively installed at both ends of the bearing seat, a sealing gasket is arranged between the upper end cover and the lower end cover and the bearing seat, a bushing is arranged between the test bearings, the bushing is sleeved on the shaft, a spring is sleeved outside the bushing, a lower locking nut is connected to the lower end of the shaft, a pressing block is sleeved on the upper end of the shaft, an upper locking nut is arranged at the upper end of the pressing block, the upper locking nut is connected to the upper end of the shaft, the pressing block is connected to the fixed seat, a sealing member is arranged between the pressing block and the upper end cover, an air hole is machined on the bearing seat and communicated with the test bearing, and a swing rod is connected to the bearing seat.

2. The fretting test bench for bearing hydrogen embrittlement test according to claim 1, characterized in that: A circlip and a washer are respectively arranged on both sides of the spring, and the circlip and the washer press the outer ring of the test bearing. Pressing rings are machined on the surfaces of the upper end cover and the lower end cover, and the pressing rings press the outer ring of the test bearing.

3. The fretting test bench for bearing hydrogen embrittlement test according to claim 1, characterized in that: The lower locking nut, the bushing and the pressing block press the inner ring of the test bearing.

4. The fretting test bench for bearing hydrogen embrittlement test according to claim 1, characterized in that: Connection protrusions are arranged around the upper end of the pressing block, screw holes are machined on the connection protrusions, and the upper part of the fixed seat is connected to the screw holes of the connection protrusions through screws to fix the pressing block.

5. The fretting test bench for bearing hydrogen embrittlement test according to claim 1, characterized in that: Mounting seats are arranged around the bottom of the fixed seat, and mounting holes are opened on the mounting seats.

6. The fretting test bench for bearing hydrogen embrittlement test according to claim 1, characterized in that: The sealing member adopts a double-lip stainless steel oil seal. The outside of the double-lip stainless steel oil seal is adhesively bonded to the upper end cover, and the inside is sealed with the periphery of the pressing block through a sealing lip.

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