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装载机机油压力过低的几个原因

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装载机机油压力过低的几个原因

发布日期:2018-02-05 作者:贵州直喷装载机 点击:

装载机机油压力过低的几个原因

Several reasons for low oil pressure of loader

贵州直喷装载机

装载机在工作过程中,如果机油的压力低于0.2 MPa(或随发动机转速变化而忽高忽低),应立即停机查找原因,待排除故障后方可继续工作,否则会酿成烧瓦、拉缸等重大机械事故。贵州直喷装载机现将机油压力过低的主要原因介绍如下。

The loader in the work process, if the oil pressure is lower than 0.2 MPa (or with the engine speed change fluctuated), should immediately stop the search for reasons, troubleshooting before it can continue to work, otherwise it will lead to the tile burning, cylinder and other major mechanical accident. The main reasons for the low oil pressure of the Guizhou direct injection loader are as follows.

(1)机油油量不足

(1) insufficient oil oil quantity

若机油油量不足,会使机油泵的泵油量减少,导致机油压力下降,加剧曲轴与轴承、缸套与活塞的磨损。

If the oil oil is insufficient, the pump oil will be reduced, the oil pressure is reduced, and the wear of the crankshaft and the bearing, cylinder sleeve and piston will be aggravated.

(2)发动机温度过高

(2) high engine temperature

若发动机温度过高,不但加速机油老化、变质,也容易使机油变稀,导致油压下降。

If the temperature of the engine is too high, it not only accelerates the aging and deterioration of the oil, but also makes the oil thinner, which leads to the decline of oil pressure.

(3)机油泵停转或泵油量不足

(3) the shutdown of the oil pump or the insufficient pump oil

机油泵的驱动齿轮与驱动轴的固定销断裂或配合键脱落,以及机油泵吸入异物而将泵油齿轮卡住,都会使机油泵停止运转,机油压力也随之降为0。

The driving pin of the oil pump and the fixed pin of the drive shaft break or cooperate with the key to fall off, and the oil pump suck the foreign matter and pump the oil gear, which will stop the operation of the oil pump and the oil pressure will also drop to 0.

当机油泵泵轴与衬套之间的间隙、齿轮端面与泵盖的间隙、齿侧间隙或径向间隙因磨损而超过允许值时,都会导致泵油量减少,造成机油压力下降的后果。

When the oil pump shaft and bushing, the clearance between the gear face and the clearance between the pump cover and the clearance or radial clearance due to wear and exceeds the allowable value, will lead to reduce the amount of oil pump, oil pressure caused by the consequences of the decline.

(4)曲轴与连杆轴承配合间隙过大

(4) the gap between the crankshaft and the connecting rod bearing is too large

发动机长期使用后,曲轴与连杆轴承的配合间隙会逐渐增大,机油压力也随着下降。

When the engine is used for a long time, the gap between the crankshaft and the connecting rod bearing will gradually increase, and the oil pressure decreases as well.

(5)机油滤油器堵塞

(5) blockage of oil filter

当机油因滤油器堵塞而不能流通时,设在滤油器底座上的安全阀就被顶开,机油便不经过滤而直接进入主油道。如果安全阀的开启压力调得过高,滤油器被堵塞时,安全阀就不能及时打开,于是机油泵压力升高,内漏增加,主油道供油量减少,引起油压下降。

When the oil is blocked by the oil filter, the safety valve located on the base of the oil filter is pushed open, and the oil will not be filtered directly into the main oil channel. If the opening pressure of the safety valve is too high and the oil filter is blocked, the safety valve can not be opened in time, so the pressure of the oil pump increases, the internal leakage increases, and the oil supply of the main oil way decreases, resulting in the decrease of the oil pressure.

(6)回油阀损坏或失灵

(6) damage or failure of the oil return valve

若回油阀弹簧疲劳软化或调整不当,阀座与钢珠的配合面磨损或被脏物卡住而关闭不严时,回油量便明显增加,主油道的油压也会随之下降。

If the spring of the return valve is fatigued or softened or adjusted unproperly, when the mating surface of the valve seat and the steel ball is worn or blocked by dirt, the oil return will increase obviously, and the oil pressure of the main oil way will also decrease.

(7)机油散热器或管路漏油

(7) oil radiator or pipeline oil leakage

机油散热器及管路漏油,会使油压下降。管路若被脏物堵塞,也会因阻力增大而使油的流量减少、油压下降。

Oil radiator and oil leakage in the pipeline will make the oil pressure drop. If the pipe is blocked by the dirt, the flow of oil will be reduced and the oil pressure will be reduced because of the increase of resistance.

(8)油压传感器失灵或油管堵塞

(8) failure of oil pressure sensor or tubing blockage

若油压传感器失灵,或由主油道至油压传感器的油管因污垢积聚而流通不畅时,油压表将显示机油压力下降。

If the oil pressure sensor fails, or the oil pipe from the main oil channel to the oil pressure sensor is not fluent because of the accumulation of dirt, the oil pressure meter will show the oil pressure drop.

(9)吸油盘堵塞

(9) blockage of oil sucking disc

机油若过脏、过黏,就容易堵塞吸油盘。当发动机小油门低速运转时,机油泵吸油量不大,主油道尚能建立起一定的压力,油压会正常;但当加大油门高速运转时,机油泵的吸油量会因吸盘阻力过大而明显减少,进而造成机油压力表的显示值下降。

If the oil is too dirty, too sticky, it is easy to plug the suction disc. When the engine throttle low speed, oil pump volume is small, the main oil channel is able to set up a certain pressure, oil pressure will be normal; but when the throttle is running at high speed, the amount of oil pump for suction resistance and significantly reduced, thereby causing the oil pressure gauge shows decreased.

(10)机油牌号不对或质量不合格

(10) wrong number of oil or unqualified quality

不同型号的发动机须添加不同的机油,同种机型在不同的季节也应采用不同牌号的机油。如果机油牌号不对,发动机运转时会因机油黏度太低而加大泄漏量,从而使油压降低。

Different types of engines are required to add different oil, and the same type should also use different grades of oil in different seasons. If the engine oil number is wrong, the engine will increase the leakage due to the low viscosity of the engine oil, thus reducing the oil pressure.

(11)调压阀设定压力偏低

(11) low pressure setting of pressure regulating valve

如果调压阀设定油压低,机油就不能有效地输送到各润滑部位,从而发生机械故障。如果油压过高,就会增加油耗,给机油泵和润滑部位增加负荷,损坏油路密封件并引发机油泄漏。

If the pressure regulating valve sets the oil pressure low, the oil can not be effectively transported to the various lubricating parts, thus the mechanical failure occurs. If the oil pressure is too high, it will increase the fuel consumption, increase the load to the oil pump and the lubricating part, damage the seal of the oil road and cause the oil leakage.


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