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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge> The reason for the failure of the "main engine body main bearing" and the maintenance method The reason for the failure of "main engine body main bearing" and the maintenance method
The main bearing of the internal combustion engine body is subjected to the effects of complex alternating loads such as gas pressure, reciprocating inertial force and centrifugal force and friction force during operation; the damage is quite severe. If the manufacturing device is not suitable, the smooth system fails, the operation is not standard; The failure of the main bearing of the internal combustion engine body. According to statistics, the body that needs to be repaired due to the failure of the main bearing of the main body accounts for 60%-70% of the total number of repaired cars. After the main bearing of the main body fails, it must incur severe wear of the crankshaft; Lifetime. Therefore, the failure of the main bearing of the internal combustion engine body should be carefully checked and repaired in time. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
(1) The oil pump fails; the pressure is smooth and some are not smooth. The gear backlash of the oil pump and the gap between the top circle of the gear and the outer casing should be checked; if the wear is too large, replace it.
(2) The oil meter fails; the oil pressure gauge pointer is fixed at a certain azimuth (normal oil pressure orientation); but the internal oil pressure condition is unknown; therefore, the bearing is not smooth. Check whether the oil circuit of the oil pressure gauge can block. Perhaps replace the new oil pressure gauge, in normal use; do not rely solely on the oil pressure gauge to recognize the smooth condition of the machine; also through the oil level and other viewing methods to know.
(3) The oil circuit and the oil filter are blocked; or the oil path is leaking; the pressure is lacking and the effect is smooth. The filter should be completely removed and the oil path should be viewed.
(4) The oil level of the oil bottom tank is lacking; the oil level does not reach the required height. The oil level should be checked with the oil level gauge after parking; and the oil is added to the oil bottom tank.
(5) The cooling water pump fails; or the cooling water is lacking; the machine is overheated. The cooling water pump should be checked and properly repaired; and the cooling water should be added together.
(6) The bearing clearance is too large; the impact on the bearing is added; or the newly repaired bearing clearance is too. 龃罅 å²¢ å²¢ ニ穑 ニ穑 ニ穑 ニ穑 ニ穑 â”— â”— è ¡ è ¡ è ¡ è ¡ è ¡ è ¡ è ¡ è ¡ è ¡ è ¡ è ¡ è ¡ é«¡å²¢ é«¡å²¢I read the å²¢ ニ鹆 å²¢ å²¢ å²¢ ç° ç° ç° ç° ç° è–· è–·.
(7) The quality of the oil is not suitable; the oil is not used for a long time; the impurities are too much; the wear of the added bearing should be replaced with the oil that meets the demand; and the oil bottom groove is completely removed.
(8) The climate is too cold; the machine temperature is too low; the viscosity of the oil is too large; therefore, after the internal combustion engine is used; the oil cannot be sent to the smooth part; plus the rotation speed is increased; the bearing is burned. Before the machine is started; Heat; make the temperature of all parts of the machine normal; make the viscosity of the oil thin.
(9) After the machine is overhauled; the bearing contact surface is rough and not oily; the wear is too large; when the shaft is reversed; the center of gravity of the shaft cannot be maintained in the middle direction; that is, the oil does not get the buoyancy effect; therefore; the bearing is subject to wear. The bearing should be repaired from the beginning; the wear is not too big; the surface can be scrubbed with fine sandpaper. To make the oil in the bearing constitute a certain oil film; then there must be a proper clearance; and after each launch of the car; Minute; this way; the oil is gradually entering the bearing.
(10) The bearing device does not depend; during the working process of the machine; the operation and operation are not proper; the impact of the bearing is too large, which leads to the failure of the bearing alloy. The machine should be operated from the head, and the operation should be reasonable; .
(11) Bearing manufacturing process and equipment process are also one of the important reasons for its ineffectiveness; for example, the thickness of the alloy layer is not uniform; the semicircular length is too high or too large.æ•å²¢ æ•å²¢ å•„è°Ÿ å•„è°Ÿ 仓 试 试 试 试 试 试 试 试 试 试 试 å‹– å‹– å‹– å‹– å‹– å‹– å‹– å‹– å‹– å‹– å‹– 蓟岬 蓟岬 蓟岬 蓟岬 蓟岬 蓟岬 蓟岬 蓟岬 蓟岬 蓟岬 蓟岬 蓟岬 蓟岬 蓟岬 è“Ÿå²¬é’ªç› å²¢ å²¢ å²¢ 鸢 鸢 鸢 鸢.
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Source: China Bearing Network Time: 2013-12-30