实际上该自动上料搅拌车滑动轴承的早期损坏比轴承烧坏更常见，因此防止滑动轴承的早期损坏非常重要。
In fact, the early damage of the sliding bearing of the automatic feeding mixer is more common than the bearing burning, so it is very important to prevent the early damage of the sliding bearing.
在气缸压力冲击载荷的反复作用下，滑动轴承表层发生塑性变形和冷加工硬化，部分丧失变形能力，逐渐形成条纹并膨胀，然后随着磨屑的脱落，在受力表层形成空洞。
Under the repeated action of the cylinder pressure impact load, the surface of the sliding bearing undergoes plastic deformation and cold work hardening, partially losing the deformation ability, gradually forming stripes and expanding, and then with the falling off of the wear debris, a cavity is formed on the stressed surface.
一般情况下，轴瓦发生点蚀时，点蚀出现，然后点蚀逐渐扩大，导致合金层的界面开裂。裂纹沿界面平行方向扩展，直剥离。
In general, when pitting occurs on the bearing bush, the pitting first occurs, and then gradually expands, leading to the interface cracking of the alloy layer. The crack propagates parallel to the interface until peeling.
滑动轴承空蚀的主要原因是油槽、油孔等结构元件截面的突变导致油流的强烈无序，在无序的真空区形成气泡，然后由于压力升高导致气泡坍塌而发生空蚀。自动上料搅拌车生产厂家
The main reason for cavitation of sliding bearing is that the sudden change of the cross section of structural elements such as oil groove and oil hole leads to the strong disorder of oil flow, forming bubbles in the disordered vacuum area, and then cavitation occurs due to the collapse of bubbles due to the pressure rise. Manufacturer of automatic feeding mixer
气蚀通常发生在轴承的高负荷区域，如曲轴主轴承的下轴瓦。轴承外圈是轴承在座孔内的相对转动。轴承通过外圈后，不仅影响轴承的散热，容易造成轴承内表面的合金腐蚀，而且会损坏轴承的背面，严重时会烧坏轴承。主要原因是轴承太短，榫头损坏，加工或安装不符合规范。
Cavitation usually occurs in high load areas of bearings, such as lower bearing shells of crankshaft main bearings. The bearing cup is the relative rotation of the bearing in the seating hole. After the bearing passes through the outer ring, it will not only affect the heat dissipation of the bearing, easily cause alloy corrosion on the inner surface of the bearing, but also damage the back of the bearing, and even burn the bearing in serious cases. The main reasons are that the bearing is too short, the tenon is damaged, and the processing or installation does not conform to the specifications.
滑动轴承的正确维护是减少轴承早期损坏的途径，也是延长轴承使用寿命的可靠保证。因此，在自动上料搅拌车发动机的日常保养和维修中，一定要注意合金表面、轴承背面、端部和棱角的外观形状。
The correct maintenance of sliding bearing is a way to reduce the early damage of bearing, and also a reliable guarantee to extend the service life of bearing. Therefore, in the daily maintenance and repair of the engine of the automatic feeding mixer, attention must be paid to the appearance of the alloy surface, the back of the bearing, the end and the corner.
如果有异常迹象或磨损过半，一定要认真查找原因，采取相应措施，轴承的工作条件，注意防止滑动轴承的早期损坏。
If there are abnormal signs or wear is more than half, be sure to carefully find out the cause, take corresponding measures, the working conditions of the bearing, and pay attention to prevent the early damage of the sliding bearing.
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2022-12-23
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