How to repair the plain bearing, how to carry out the maintenance and maintenance of the bearing

The damage forms of plain bearings include wear, burning, spalling and cracks on the working surface. The main cause of these defects is that the oil film is damaged for some reason, resulting in direct friction between the journal and the bearing surface. For defects in different bearing forms, the repair methods adopted are also different.

1) The repair of integral sliding bearings generally adopts the method of replacing the shaft sleeve.

2) The split sliding bearing is slightly worn, which can be dealt with by adjusting the gasket and re-scraping.

3) If there is no serious abrasion on the working surface, the clearance can be adjusted by the nut when the inner column and the outer cone sliding bearing is only precision trimmed; When there is serious abrasion on the working surface, the spindle should be disassembled, and the bearing should be scraped again to restore its fitting accuracy. When there is no adjustment margin, the outer cone diameter of the bearing can be increased by spraying, or the conical surface of the small end of the bearing can be removed, and the thread length can be lengthened to increase the adjustment range. When the bearing is deformed and worn severely, it must be replaced.

4) For multi-watt sliding bearings, when there is a slight abrasion on the working surface, the inner surface of the bearing can be ground and polished by grinding. When the working surface is seriously burned or worn due to the shaft, the inner surface of the bearing can be repaired by scraping.

The mechanism of their occurrence is different. I recommend you to read the book by Professor Wen Shizhu of Tsinghua University, which may have the answer. Or you can also take a look at the book on elastofluid dynamics.

1. In order to give full play to the bearing and maintain its due performance for a long time, it is necessary to do a good job in regular maintenance (regular inspection). It is important to detect faults at an early stage and prevent accidents before they occur through appropriate regular inspections to improve productivity and economy.

2. When cleaning and removing the bearing for inspection, first use photography and other methods to make a record of the appearance. In addition, check the amount of remaining lubricant and sample the lubricant before cleaning the bearing.

3. The cleaning of the bearing is divided into rough washing and fine washing, and the metal grid can be placed at the bottom of the container used.

4. During rough washing, use a brush to remove grease or sticky objects in the oil. In this case, if you rotate the bearing in oil, be careful that the rolling surface will be damaged due to foreign matter, etc.

5. When fine washing, slowly rotate the bearing in the oil, which must be carried out carefully.

6. The cleaning agent usually used is neutral and does not contain water, diesel or kerosene, and sometimes warm lye is used as needed. Regardless of the type of cleaning agent used, filter it frequently to keep it clean.

7. After cleaning, immediately coat the bearing with anti-rust oil or anti-rust grease.

8. In order to judge whether the removed bearing can be reused, it is necessary to focus on checking its dimensional accuracy, rotation accuracy, internal clearance, mating surface, raceway surface, cage and sealing ring.

9. The inspection results can be judged by those who use inertial bearings or are proficient in bearings.

10. The criteria for judging vary according to the mechanical properties and importance, as well as the inspection cycle. If there is any of the following damages, the bearing shall not be reused and must be replaced.

Dalian Guangyang Bearing Manufacturing Co., Ltd. is a production and processing enterprise mainly engaged in bearings, the company is located in Wafangdian, Liaoning Province, with a registered capital of 5 million yuan, mainly engaged in bearings, replacing imported bearings and other products.

Dalian Guangyang bearing manufacturing **** for your answer? How to maintain bearings and common bearing repairsIn order to maintain the original performance of bearings in good condition for as long as possible, it is necessary to maintain and overhaul them to prevent accidents, ensure the reliability of operation, and improve productivity and economy.

Maintenance is best carried out on a regular basis according to the operating conditions of the machine. This includes monitoring of operating conditions, replenishment or replacement of lubricants, and periodic disassembly inspections. As a maintenance item during operation, there are bearing rotation sounds, vibrations, temperatures, lubricant conditions, and so on.

Summary. Hello dear <>

The main reason is that the maintenance work is not carried out in accordance with the specified requirements, which aggravates the wear of the transmission shaft, and then loosens. It may be time to replace the screws and spring pads. The pulse shaft causes collisions when starting and stopping, so it is looser.

If you send them, replace the screws and spring pads. It is recommended to replace the good screws. It won't take too long, start the engine, hang the high grade, and check the swing of the transmission shaft.

If the oscillation is maximum when the speed drops, it means that the oscillation and noise are caused by the transmission imbalance.

What should be done with propeller shaft slippage.

Hello dear <>

The main reason is that the maintenance work is not carried out in accordance with the specified requirements, which aggravates the wear of the transmission shaft, and then loosens. It may be time to replace the screws and spring pads. The pulse shaft causes collisions when starting and stopping, so it is looser.

If you send them, replace the screws and spring pads. It is recommended to replace the collapsed screws. It won't be too long, start the engine, hang the belt rock high-grade, check the line round to check the swing of the transmission shaft.

If the oscillation is maximum when the speed drops, it means that the oscillation and noise are caused by the transmission imbalance.

The noise is caused by loosening. If the noise is not serious, you can drive it back and repair it later; If it is severe, the repair should be stopped immediately. The propeller shaft is unbalanced.

The balance of the transmission shaft is more than 100gcm, and the transmission shaft is shaken during operation, and the bolts of the transmission shaft are loosened due to shaking. Because there is no fundamental solution to the problem, only simple fastening is used, and it becomes loose after a short period of use.

The radial runout of the transmission shaft is too large; Because the size of the fitting does not meet the accuracy requirements, the positioning stop of the flange fork is too tight or too loose, so that the axis of the two flanges is not easy to coincide during installation; The shaft tube of the transmission shaft is bent and deformed, and there are depressions; The center line of the universal joint cross shaft at both ends of the transmission shaft is not on the same type of biscular, and the rent roller cannot rotate at a uniform speed. The transmission shaft connector does not meet the requirements of Changyu. The diameter of the stop on the flange does not match; The inner diameter of the flange bolt hole is too large; Using substandard propeller shaft bolts, these substandard fittings will make the mating clearance too large.

When the engine speed changes, the bolt subjected to shear force swings in the hole, and the bolt is easy to loosen. It is important to point out here that ordinary bolts should never be used.

The Steyr series drive shaft bolts are high-strength bolts and are hooked into low gear. If there is obvious shaking phenomenon of the transmission shaft, it means that the rotation of the transmission Zen shaft is uneven. The propeller shaft should be removed for balance checking.

If there is no obvious shaking phenomenon of the transmission shaft, the connection parts should be checked with emphasis on collapse, such as flanges, flange forks, transmission shaft bolts, etc., and unqualified accessories can not be used resolutely to prevent serious accidents caused by the transmission shaft falling off.

If only the damage does not affect the internal structure of the bearing, you can use abrasive to grind the broken place, and then coat it with a layer of film, and then if there is rust, you can remove the rust treatment, and finally lubricate the shelf treatment. If the degree of fracture is severe and may affect the internal structure of the bearing, then you can consider disassembling the broken bearing, cleaning it, reassembling it with new parts, and then lubricating it.

1. Check the broken bearing: when the bearing is broken, the broken part should be checked to determine the cause of the break and the type of break 2, replace the broken bearing: a new No. 1 component can be used to replace the broken bearing, and the drum bearing can be selected according to the type of mechanical equipment 3

Treat the surface of the broken part with refined sandpaper to ensure that it is smaller than the original size, but not too small 4. Install the roller bearing: you can use the clamp to tighten, weld, smooth and non-riveting methods to fix the roller bearing. 5. Smooth the surface

Use a grinding wheel to smooth the surface of the broken part to ensure smoothness and dimensional accuracy, so that the drum bearing works normally 6, shaping the broken edge: the broken edge may be bent and rushing, the bent edge should be shaped, so that it is in an elliptical shape, so as not to have an impact on the bearing, etc. 7, install the bearing: install the drum bearing on the mechanical equipment, and adjust the axial direction of the bearing axis, to ensure that the bearing and the wheel are in correct contact 8, debugging the mechanical equipment:

After the installation is completed, start the mechanical equipment for volt debugging, if there is any abnormality, it should be dealt with in time and judged to ensure the normal operation of the roller bearing.

Summary. Generally, the shaft wear will cause the problem of loosening between the bearings, and the shaft wear is a frequent failure in the operation of enterprise equipment, and there are many reasons for the wear of the shaft, but in most cases there are two reasons.

1. Insufficient lubrication; That.

Second, caused by metal characteristics, although the metal has good hardness but poor impact resistance, can not be restored after deformation, poor fatigue resistance, so it is easy to cause fatigue wear of the shaft head, there are many repair methods for shaft wear, generally repair welding, brush plating or scrap replacement.

How to get the shaft worn out and the bearing loose.

Dear, hello, how to get the shaft worn and the bearing loose, I will help you with this problem, it takes some time to type, please be patient!

Good. Hello dear, the shaft is worn and the bearing is loose can be so to shoot the trip which 1Grinding with a grinder removes rust and bad metal, exposes the metal body, and forms a certain roughness or turns out the thread.

2. .Cleaning agent to remove oil stains, such as the original workpiece long-term oil operation, the surface of the workpiece should be baked with a spray lamp, electric stove, etc., the oil will be baked, and the oil will be removed again after cooling 3

Clean up all contaminants in the area to be repaired. 4.Proportional blending of polymer composites.

5.Apply the blended polymer code composite evenly to the repair site. 6.

After curing, it will be installed and machined.

Generally, the shaft wear will cause the problem of loosening between the bearings, and the shaft wear is a frequent failure in the operation process of the enterprise equipment.

1. Insufficient lubrication; That.

Second, caused by metal characteristics, although the metal failure inspection has good hardness but poor impact resistance, deformation can not be restored, fatigue resistance is poor, so it is easy to cause fatigue wear of the shaft head, there are many repair methods for the shaft wear, generally repair welding, brush plating or scrap replacement.

Can cast steel heel bearings be welded?

Can cast steel heel bearings be welded?

Cast steel heel bearings can be welded.

Cast iron has a high carbon content, which is not good for welding, and 45 steel itself is not easy to weld. Welding is equivalent to normalizing, quenching, high carbon content, weld structure has more cementite, weld brittleness, internal stress concentration. Even if welding, the weldment must be preheated, welded at a certain temperature, and slowly cooled after welding, and then annealed for stress relief.

Welding should be ridge can be welded, this should take into account the strength requirements and importance of your parts welding, choose a good welding rod, pay attention to the welding method).