If the small concrete mixer has problems and the cause of failure is not found, it will have an adverse impact on the directional booster pump, which is more likely to cause damage.

小型混凝土搅拌机转向助力泵，我们通常称之为动力转向泵，是转向助力系统的动力转向和转向系统的核心。对于重型清障车，由于机械转向力和驾驶员的劳动强度，液压转向系统更为重要。

Small concrete mixer power steering pump, which we usually call power steering pump, is the core of power steering and steering system of power steering system. For heavy-duty wrecker, due to mechanical steering force and driver's labor intensity, hydraulic steering system is more important.

通用叶片泵包括在内腔中具有双曲线的泵体，带槽的转子，叶片等。有些安装在发动机后部的飞轮壳上，也由定时齿轮驱动。当发动机运转时，增压泵的转子被驱动旋转，叶片在离心力的作用下沿叶片槽向外移动，并抵靠泵体的内壁，体积大于封闭的叶片之间的空间在转子旋转期间连续增大和小。实现了吸油和油压的过程。对于转子的每次旋转，吸油和油压完成两次。泵体内还有一个阀，用于限制压力。当转向系统的外部负载增加，导致油压上升到一定值时，阀打开以移除负载。节流阀和流量控制阀也安装在泵体中，以确保增压泵的排量基本恒定。

The general vane pump includes the pump body with hyperbola in the inner cavity, the rotor with groove, the vane and so on. Some are mounted on the flywheel housing at the rear of the engine and are also driven by timing gears. When the engine is running, the rotor of the booster pump is driven to rotate, and the blades move outward along the blade groove under the action of centrifugal force and against the inner wall of the pump body. The volume is larger than that of the closed blades, and the space between the blades increases and decreases continuously during the rotor rotation. The process of oil absorption and oil pressure is realized. For each rotation of the rotor, oil suction and oil pressure are completed twice. There is also a relief valve in the pump body to limit the pressure. When the external load of the steering system increases, causing the oil pressure to rise to a certain value, the relief valve opens to remove the load. Throttle valve and flow control valve are also installed in the pump body to ensure that the displacement of booster pump is basically constant.

动力转向泵的使用和维护尤为重要，因此必须做到以下几点：

The use and maintenance of power steering pump is particularly important, so the following points must be achieved:

1.如果转向泵助力器在使用过程中发生泄漏，撞击或异常噪音，应及时检查并排除。

1. If the steering pump booster has leakage, impact or abnormal noise during use, it should be checked and eliminated in time.

2.小型混凝土搅拌机运行一段时间后，应及时更换液压油过滤器。特别是安装新泵后，应在2500-3000后更换液压油。

2. The hydraulic oil filter should be replaced in time after the small concrete mixer runs for a period of time. Especially after installing a new pump, the hydraulic oil should be changed after 2500-3000 km.

3.定期检查储罐的油位。应及时补充清洁液压油。在维护期间，应使用酒精清洁储罐中的滤芯。

3. Regularly check the oil level of the storage tank. Add clean hydraulic oil in time. During maintenance, alcohol should be used to clean the filter element in the tank.

4.正确选择液压油是确保增压泵率和长寿命的关键。

4. Correct selection of hydraulic oil is the key to ensure high efficiency and long life of booster pump.

小型混凝土搅拌机维修中应注意的事项

Matters needing attention in maintenance of small concrete mixer

1.搅拌缸：检查罐头和其他部件的螺丝是否在使用前50小时内移动。清洁内部润滑脂并添加润滑剂。

1. Mixing cylinder: check whether the screws of cans and other parts move within 50 hours before use. Clean the internal grease and add lubricant.

2.液压驱动系统：液压系统每次都应正常运行，以保证搅拌轮的正常运行。同时，它们的清洁度得不到保证，灰烬等压缩系统无法压缩，系统无法操作或损坏。

2. Hydraulic drive system: the hydraulic system should operate normally every time to ensure the normal operation of the mixing wheel. At the same time, their cleanliness is not guaranteed, the ash and other compression systems cannot be compressed, and the system cannot be operated or damaged.

3.供水系统：液压供水系统选位于水箱的四分之一处，并始终检查阀门是否密封或正常运行。用水防止管道冻结。

3. Water supply system: the hydraulic water supply system is preferably located at the quarter of the water tank, and always check whether the valve is sealed or in normal operation. Use water to prevent pipes from freezing.

除了如上所述的识别之外，还需要对搅拌的汽车系统进行例行检查以修复旋入式密封车辆以进行维护。摩擦性能影响车辆的性能。

In addition to the identification described above, routine inspection of the agitated vehicle system is required to repair the screw in sealed vehicle for maintenance. Friction performance affects the performance of vehicle.