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.

滑動軸承的正確維護是減少軸

The correct maintenance of sliding bearing is to reduce the shaft

承早期損壞的有效途徑，也是延長軸承壽命的可靠保證。因此，在發動機的日常維護和維修中，必須注意軸承的合金表面、背面、端頭及邊緣棱角處的外觀形狀，如有異?；虺霈F過半磨損的征兆，就要認真查明原因，并采取相應的措施，改善軸承的工作條件，重視對滑動軸承早期損壞的預防。

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.

混凝土攪拌車軸承損壞的維修方法

Maintenance method for bearing damage of concrete mixer truck

一、混凝土攪拌車軸承損壞的措施

1、 Measures for bearing damage of concrete mixer truck

滑動軸承的正確保護是減少軸承前期損壞的有效途徑，也是延長軸承壽命的可靠保證。因而，在發動機的日常保護和修理中，有必要留意軸承的合金表面、反面、端頭及邊際棱角處的外觀形狀，如有異?；虺霈F過半磨損的預兆，就要仔細查明原因，并采取相應的措施，改善軸承的工作條件，重視對滑動軸承前期損壞的預防。

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.

滑動軸承在氣缸壓力沖擊載荷的重復作用下，表層發生塑性變形和冷作硬化，局部喪失變形能力，逐步構成條紋并不斷擴展，然后隨著磨屑的掉落，在受載表面層構成凹穴。

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.

一般軸瓦發生穴蝕時，先出現凹坑，然后這種凹坑逐步擴展并引起合金層界面的開裂，裂紋沿著界面的平行方向擴展，直到脫落為止?；瑒虞S承穴蝕的首要原因是，因為油槽和油孔等結構要素的橫斷面突然改變引起油流強烈紊亂，在油流紊亂的真空區構成氣泡，隨后因為壓力升高，氣泡潰滅而發生穴蝕。

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.

穴蝕一般發生在軸承的高載區，如曲軸主軸承的下軸瓦上。軸承走外圓軸承走外圓就是軸承在座孔內有相對滾動。軸承走外圓后，不只影響軸承的散熱，容易使軸承內表面合金燒蝕，而且還會使軸承反面受損，嚴重時燒毀軸承。其首要原因是，軸承過短、凸榫損害、加工或者裝置不符合規范等。

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.

混凝土攪拌車軸承損壞的維修方法

Maintenance method for bearing damage of concrete mixer truck

發生在軸承的高載區，如曲軸主軸承的下軸瓦上。軸承走外圓軸承走外圓就是軸承在座孔內有相對轉動。軸承走外圓后，不僅影響軸承的散熱，容易使軸承內表面合金燒蝕，而且還會使軸承背面損傷，嚴重時燒毀軸承。其主要原因是，軸承過短、凸榫損傷、加工或者安裝不符合規范等。

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.

任何質量等級的潤滑油在運用過程中油質都會發生變化。到一定路程之后，功能惡化，會給發動機帶來種種問題。為了防止問題的發生，應結合運用條件定期換油，并使油量適中。

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.

機油從濾清器的細孔經過時把油中的固體顆粒和粘稠物積存在濾清器中。如濾清器阻塞，機油不能經過濾芯時，會脹破濾芯或翻開閥，從旁通閥經過，仍把臟物帶回潤滑部位，促使發動機磨損，內部的污染加重。

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.