小型混凝土搅拌机液压系统有3个基本的“致病”因素：污染、过热和进入空气。这3个不利因素有着密切的内在联系，出现其中任何一个问题，就会连带产生另外一个或多个问题。下面小编就来为您讲讲。

The hydraulic system of small concrete mixer has three basic "pathogenic" factors: pollution, overheating and entering the air. These three unfavorable factors are closely related, and any one of them will cause one or more problems. Let's talk about it.

1、污染

1. Pollution

工作油液因进入污物而变质，进入油液中的污物(如灰、砂、土等)的来源有：

The working oil deteriorates due to entering the dirt. The dirt (such as ash, sand, soil, etc.) entering the oil comes from:

(1)系统外部不清洁。不清洁物在加油或检查油量时被带入系统，或通过损坏的油封或密封环而进入系统;

(1) The exterior of the system is not clean. Uncleans are brought into the system when refueling or checking the oil volume, or enter the system through damaged oil seals or sealing rings;

(2)内部清洗不干净。在油箱或部件内仍留有微量的污物残渣;

(2) The interior was not cleaned thoroughly. There are still traces of dirt and residues in the oil tank or components;

(3)加油容器或用具不洁;

(3) The refueling container or appliance is unclean;

(4)制造时因热弯油管而在管内产生锈皮;

(4) Rust scale is generated in the pipe due to hot bending of the pipe during manufacturing;

污物会造成零件的磨损与腐蚀，尤其是对于精加工的零件，它们会擦伤胶皮管的内壁、油封环和填料，而这些东西损伤后又会导致更多的污物进入系统中，这样就形成恶性循环的损坏。

Dirt will cause wear and corrosion of parts, especially for precision machined parts, they will scratch the inner wall of rubber tube, oil seal ring and packing, which will cause more dirt to enter the system after being damaged, thus forming a vicious circle of damage.

2、过热

2. Overheating

系统过热可能由以下一种或多种原因造成：

System overheating may be caused by one or more of the following reasons:

(1)油中进入空气或水分，当液压泵把油液转变为压力油时，空气和水分就会助长热的增加而引起过热;

(1) Air or water enters the oil. When the hydraulic pump converts the oil into pressure oil, the air and water will contribute to the increase of heat and cause overheating;

(2)容器内的油平面过高，油液被强烈搅动，从而引起过热;

(2) The oil level in the container is too high, and the oil is strongly stirred, causing overheating;

(3)质量差的油可能变稀，使外来物质悬浮着，或与水有亲合力，这也会引起生热;

(3) The oil with poor quality may become thinner, causing foreign substances to suspend, or having affinity with water, which may also cause heat generation;

3、进入空气

3. Inlet air

空气进入油中除引起过热外，也会有相当数量空气在压力下被溶于油内。如果被压缩的体积大约有10%是属于被溶的空气，则压力下降时便会形成泡沫。

In addition to overheating caused by air entering the oil, a considerable amount of air will be dissolved in the oil under pressure. If about 10% of the compressed volume is dissolved air, foam will form when the pressure drops.

而工作液压缸在减压回油时，带泡沫的油液就会形成“海绵”的性质。此外，油中含有许多泡沫会增加总体积，将造成油箱或储油器的溢油现象。

When the working hydraulic cylinder returns oil under reduced pressure, the oil with foam will form a "sponge" property. In addition, many foams in the oil will increase the total volume, which will cause oil spillage in the oil tank or oil reservoir.

含有空气的工作油，在传递动力时会产生急跳的痉挛现象，使动力传递不均匀，由此产生的压力波动和应力，将会使零部件损坏，严重时会导致整个系统损坏。含有空气的工作油，还会造成液压泵发生气穴的危险，由此而产生更大的吸力，会把更多的空气连同其他杂质都吸入系统内。因油中进入空气而产生过热，空气进入的同时也会带进灰尘，这些情况会使油很快变质。

Working oil containing air will produce jerk when transmitting power, which will cause uneven power transmission. The resulting pressure fluctuation and stress will damage parts and even the whole system. The working oil containing air will also cause the danger of cavitation of the hydraulic pump, which will generate greater suction, and will suck more air and other impurities into the system. Overheating occurs when the oil enters the air. The air will also bring in dust, which will quickly deteriorate the oil.

要进行多面预防才能确保液压系统正常地工作。为此，要对液压系统建立专门的预防保养制度，其首要任务是严格检查工作油的状况。在换油时，保养服务人员要参加，并帮助对系统进行多面检查。更多相关内容就来我们网站https://www.zishangliaojiaobanji.cn咨询吧！

Multi sided prevention is required to ensure the normal operation of the hydraulic system. Therefore, it is necessary to establish a special preventive maintenance system for the hydraulic system, and its primary task is to strictly check the condition of the working oil. When changing the oil, the maintenance service personnel should participate in and help to carry out multiple inspections of the system. More relevant content will come to our website https://www.zishangliaojiaobanji.cn Consult!