The bearing of concrete mixer truck is a special bearing, which has a super bearing capacity. The bearing system is a special bearing for the reducer of concrete mixer. It is a component that can fix and reduce the load friction coefficient in the process of mechanical transmission. The early damage of sliding bearing of concrete mixer truck is more common than that of bearing burning, so it is very important to prevent the early damage of sliding bearing.

滑动轴承的正确维护是减少轴

The correct maintenance of sliding bearing is to reduce the shaft

承早期损坏的有效途径，也是延长轴承寿命的可靠保证。因此，在发动机的日常维护和维修中，必须注意轴承的合金表面、背面、端头及边缘棱角处的外观形状，如有异常或出现过半磨损的征兆，就要认真查明原因，并采取相应的措施，改善轴承的工作条件，重视对滑动轴承早期损坏的预防。

The effective way of bearing early damage is also the reliable guarantee of prolonging bearing life. Therefore, in the daily maintenance and repair of the engine, attention must be paid to the appearance and shape of the alloy surface, back face, end and edge corner of the bearing. In case of abnormal or more than half wear signs, it is necessary to carefully find out the causes, take corresponding measures to improve the working conditions of the bearing, and pay attention to the prevention of the early damage of the sliding bearing.

混凝土搅拌车轴承损坏的维修方法

Maintenance method for bearing damage of concrete mixer truck

一、混凝土搅拌车轴承损坏的措施

1、 Measures for bearing damage of concrete mixer truck

滑动轴承的正确保护是减少轴承前期损坏的有效途径，也是延长轴承寿命的可靠保证。因而，在发动机的日常保护和修理中，有必要留意轴承的合金表面、反面、端头及边际棱角处的外观形状，如有异常或出现过半磨损的预兆，就要仔细查明原因，并采取相应的措施，改善轴承的工作条件，重视对滑动轴承前期损坏的预防。

The correct protection of sliding bearing is an effective way to reduce the early damage of bearing, and it is also a reliable guarantee to extend the bearing life. Therefore, in the daily protection and repair of the engine, it is necessary to pay attention to the appearance and shape of the alloy surface, the reverse side, the end and the edge corner of the bearing. If there is abnormal or more than half wear omen, it is necessary to carefully find out the causes, take corresponding measures to improve the working conditions of the bearing, and pay attention to the prevention of the early damage of the sliding bearing.

滑动轴承在气缸压力冲击载荷的重复作用下，表层发生塑性变形和冷作硬化，局部丧失变形能力，逐步构成条纹并不断扩展，然后随着磨屑的掉落，在受载表面层构成凹穴。

Under the repeated action of cylinder pressure impact load, the surface layer of sliding bearing will undergo plastic deformation and cold work hardening, local deformation capacity will be lost, and the striation will gradually form and continue to expand, and then with the drop of wear debris, pits will be formed in the loaded surface layer.

一般轴瓦发生穴蚀时，先出现凹坑，然后这种凹坑逐步扩展并引起合金层界面的开裂，裂纹沿着界面的平行方向扩展，直到脱落为止。滑动轴承穴蚀的首要原因是，因为油槽和油孔等结构要素的横断面突然改变引起油流强烈紊乱，在油流紊乱的真空区构成气泡，随后因为压力升高，气泡溃灭而发生穴蚀。

Generally, when pitting occurs, pits first appear, and then the pits gradually expand and cause cracks at the alloy layer interface. The cracks propagate along the parallel direction of the interface until they fall off. The main reason of cavitation erosion of sliding bearing is that the cross section of oil groove, oil hole and other structural elements suddenly changes, which causes oil flow to be strongly disordered. Bubbles form in the vacuum area with oil flow disorder, and then cavitation occurs because of pressure rise and bubble collapse.

穴蚀一般发生在轴承的高载区，如曲轴主轴承的下轴瓦上。轴承走外圆轴承走外圆就是轴承在座孔内有相对滚动。轴承走外圆后，不只影响轴承的散热，容易使轴承内表面合金烧蚀，而且还会使轴承反面受损，严重时烧毁轴承。其首要原因是，轴承过短、凸榫损害、加工或者装置不符合规范等。

Cavitation usually occurs in the high load area of the bearing, such as the lower bearing bush of the crankshaft main bearing. The bearing goes through the outer circle, and the bearing moves through the outer circle, which means that the bearing has relative rolling in the seat hole. After the bearing goes to the outer circle, it will not only affect the heat dissipation of the bearing, but also cause the alloy on the inner surface of the bearing to be ablated, and the negative side of the bearing will be damaged, and the bearing will be burned down in serious cases. The main reason is that the bearing is too short, tenon damage, processing or device does not conform to the specification.

混凝土搅拌车轴承损坏的维修方法

Maintenance method for bearing damage of concrete mixer truck

发生在轴承的高载区，如曲轴主轴承的下轴瓦上。轴承走外圆轴承走外圆就是轴承在座孔内有相对转动。轴承走外圆后，不仅影响轴承的散热，容易使轴承内表面合金烧蚀，而且还会使轴承背面损伤，严重时烧毁轴承。其主要原因是，轴承过短、凸榫损伤、加工或者安装不符合规范等。

It occurs in the high load area of the bearing, such as the lower bearing bush of the crankshaft main bearing. Bearing running outer circle bearing running outer circle means that the bearing has relative rotation in the seat hole. After the bearing goes to the outer circle, not only the heat dissipation of the bearing is affected, but also the alloy on the inner surface of the bearing is easily ablated, and the back surface of the bearing will be damaged, and the bearing will be burned down in serious cases. The main reason is that the bearing is too short, tenon damage, processing or installation does not conform to the specification.

任何质量等级的润滑油在运用过程中油质都会发生变化。到一定路程之后，功能恶化，会给发动机带来种种问题。为了防止问题的发生，应结合运用条件定期换油，并使油量适中。

The oil quality of any grade of lubricating oil will change during operation. After a certain distance, the function deterioration will bring various problems to the engine. In order to prevent the occurrence of the problem, the oil should be changed regularly according to the operation conditions, and the oil quantity should be moderate.

机油从滤清器的细孔经过时把油中的固体颗粒和粘稠物积存在滤清器中。如滤清器阻塞，机油不能经过滤芯时，会胀破滤芯或翻开阀，从旁通阀经过，仍把脏物带回润滑部位，促使发动机磨损，内部的污染加重。

When the oil passes through the fine hole of the filter, the solid particles and viscous substances in the oil are accumulated in the filter. If the filter is blocked and the oil cannot pass through the filter element, the filter element will be broken or the safety valve will be opened to pass through the bypass valve, and the dirt will still be brought back to the lubrication part, which will cause the engine wear and increase the internal pollution.