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What should we pay attention to when choosing sliding bearings for modern cars

Author:admin   Date:2022-05-20
Thin-walled bearing bushes are not allowed to be scratched. The wear-resistant alloy coating on the main bearing of the crankshaft and the connecting rod bearing of the modern vehicle engine is very thin, the dimensional accuracy of the machining is very high, and the surface roughness value is very low. Generally, scratching is not allowed. It can only be selected according to the corresponding size; if there is no sliding bearing of suitable size, if necessary, the crankshaft can be ground by the method of the base hole system to obtain a suitable fit clearance. In order to adapt to this situation, the method of grinding the journal according to the size of the bearing bush should be adopted, and the method of matching the bearing bush in the past should be changed. For the three-layer alloy bearing bush, the surface alloy layer is covered by electroplating, which is to improve the surface performance of the copper-lead alloy bearing. If it is scraped, this effect will be lost and the original design idea will be destroyed. The previously widely used processes such as scraping and striking tiles should gradually transition to the direction of directly assembling finished tiles.

2. After the sliding bearing bush is worn, do not add pads on the back of the bush. The bearing pad and the pad seat are two parts. After assembly, they should work like one part. Since the bearing pad is thin-walled, in order to ensure the correct geometry during work, it depends entirely on the geometry of the seat hole. Therefore, the machining accuracy of the two is It is very high, and the surface roughness value is very low. If paper is placed in between, it will destroy their correct fit. At the same time, paper is a bad conductor of heat, which is not conducive to the heat dissipation of the bearing bush, so the padding may cause the oil temperature of the lubrication system. If it is too high, it may even cause a tile burning accident. In the same way, it is not allowed to put copper skin under the tile back. In addition, it is not allowed to loosen after the bearing bush is assembled, and it is easy to loosen after the pad is backed, thereby destroying the normal working conditions of the bearing bush.

3. There is a positioning lip on the back of the bearing bush to prevent rolling. The bearing pad of the sliding bearing is required to be reliably positioned with the bearing pad seat during operation, and neither rotation, movement nor vibration is allowed. During the overhaul, it was found that the back of the tile was very smooth, indicating that there was a loose phenomenon. However, the key measure for the reliable positioning of the bearing bush is the appropriate amount of interference, not the function of the positioning lip, which is used for initial positioning during assembly. These conditions must be paid attention to when choosing sliding bearings for vehicles.

Specializing in manufacturing sliding bearing series products, the physical production enterprises have reached 150 million sets of production capacity, with one automatic sintering line. Enterprise technology relying on Research Institute and colleges and universities and colleges and universities and colleges and universities, constantly develop self-lubricating bearing products adapted to different working conditions and various mechanical fields. The product performance has reached the level of foreign brass bush products of the same kind. The sales of products all over more than 40 countries and regions at home and abroad, and have been recognized by domestic and foreign users. In 2006, the company passed the ISO9001 quality system certification! And there is TUV system certification!

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