The self loading mixer is composed of chassis and top loading. Besides the mixing tank, the hydraulic system is the most important part for the top loading Zui. The hydraulic oil pump in the hydraulic system is a relatively fine part. Therefore, great attention should be paid to the use and maintenance of the hydraulic oil pump during the operation of the self loading mixer.

油泵的工作原理：当通过操纵杆装置使变量杆向左转动，油泵就开始从油口排油，经过高压油管进入马达，马达转动，流经马达的油变成低压油，再经过另一高压油管从另一个油口流回油泵。变量杆转动角度越大，油泵每转排出的油量就会越多，马达的转速就越高。当操纵变量杆使其向右转动，这时压力油就从另一口排出，马达旋向改变，低压油从油口流回油泵。

The working principle of the oil pump: when the variable rod is turned to the left by the control lever device, the oil pump starts to drain oil from the oil port, enters the motor through the high-pressure oil pipe, the motor rotates, and the oil flowing through the motor becomes low-pressure oil, and then flows back to the oil pump from another oil port through another high-pressure oil pipe. The greater the rotation angle of the variable rod, the more oil is discharged from the oil pump per revolution, and the higher the motor speed is. When the variable lever is turned to the right, the pressure oil is discharged from the other port, the rotation direction of the motor is changed, and the low-pressure oil flows back to the oil pump from the oil port.

自上料搅拌车马达的转动带动了减速机，从而使搅拌车的搅拌罐能在一定转速范围内无极变速且有两种旋向。其它液压油泵原理也是如此。要使液压油泵高效、无故障的工作，就要在日常使用中加强维护保养，并按说明书进行操作，按要求及时的对液压油和辅助装置进行更换。

The rotation of the motor of the self loading mixer drives the reducer, so that the mixing tank of the mixer can be infinitely variable in a certain speed range and has two rotation directions. The principle of other hydraulic oil pumps is the same. In order to make the hydraulic oil pump efficient and trouble free, it is necessary to strengthen the maintenance in daily use, operate according to the manual, and timely replace the hydraulic oil and auxiliary devices as required.

液压油更换需要注意一下几点：

Pay attention to the following points when changing hydraulic oil:

1. 使用性能稳定符合要求的液压油，不要使用经过过滤和沉淀的液压油。

1. Use hydraulic oil with stable performance and meet the requirements, do not use filtered and precipitated hydraulic oil.

2. 滤油器使用过滤精度为10的。

2. The oil filter should use the filter precision of 10.

3. 主系统、泵、马达的壳体在启动之前要充满液压油。

3. The shell of main system, pump and motor should be filled with hydraulic oil before starting.

4. 液压油和滤芯要按说明书及时更换。

4. The hydraulic oil and filter element should be replaced in time according to the instructions.

自上料搅拌车的液压系统有国产的、中外合资的、进口的，一般小型的搅拌车标配的都是国产液压系统，大型搅拌车，比如后双桥、小三轴、前四后八搅拌车一般标配的都是进口或中外合资的液压系统，当然除了标配，也可选装，可根据客户的需求来安装，不同品牌的液压系统价格也是不同的。

There are domestic, Sino foreign joint venture and imported hydraulic systems for the loading mixer. Generally, the standard configuration of small mixer truck is domestic hydraulic system. For large mixer truck, such as rear double axle, small three axle, front four and rear eight mixer truck, the standard configuration is imported or Sino foreign joint venture hydraulic system. Of course, in addition to the standard configuration, it can be installed according to the needs of customers Brand hydraulic system price is also different.

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