The engine is the heart of the car, which continuously provides power for other parts. The internal bearings were dominated by sliding bearings before. At present, most of them adopt sealed ball bearings on the premise of improving the bearing performance. The following is a detailed explanation of several typical bearings in the engine according to the understanding of the engine. I hope it will be helpful to you.

Alternator bearing

The bearing of alternator is a single row sealed ball bearing, which is mainly subject to centripetal force. It is required to operate reliably under the conditions of rotating speed exceeding 2000r / min and temperature greater than 180 ℃. The ferrule and rolling element are made of high-purity GCr15, and the hardness after heat treatment is required to be 58 ~ 64hrc. The cage is generally made of nylon PA46, and the sealing ring is generally made of acrylate rubber ACM, The reference standard is JB / t8167-2006.

Air conditioning compressor electromagnetic clutch bearing

The electromagnetic clutch bearing of the air-conditioning compressor is a double row angular contact ball bearing. The outer ring rotates. The speed of the air-conditioning pulley can reach 7000 ~ 13000 R / min, and the maximum temperature is 160 ℃. The material is the same as above. The cage changes from a part of the ordinary single spherical pocket to a cylindrical surface. The reference standard is JB / t10531-2005.

Tensioner and idler bearing

The tensioner and idler bearings are high-performance sealed ball bearings. The former acts on the loose edge of the synchronous transmission belt and the latter acts on the tight edge of the synchronous transmission belt. The materials are basically the same as above. The cage can be made of engineering plastic, 08 steel or 10 steel. The sealing ring is made of ACM or FPM (fluorine rubber). The reference standard is JB / t10859-2008.

Water pump shaft bearing

The bearing of water pump shaft is generally double row ball bearing, and the radial dimension is smaller than that of general bearing. In essence, it is a double support bearing system with simplified structure. The two supported bearings have no inner ring, the raceway of the rolling element is directly made on the shaft, the outer ring of the two supported bearings is made into a whole, and both sides of the ring are sealed with seals. Its rollers are usually made of high chromium bearing steel, and the materials of the shaft and outer ring are made of carburized steel or high chromium bearing steel, The reference standard is JB / t8563-2010.