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油泵和油马达是液压系统中的重要组成元件。油泵是将机械能转变为液体能的机构,而油马达是将液体能转变为机械能的机构。油泵相当于电力传动中的发电机,油马达相当于电动机。一般说来,容积式油泵和油马达在结构上是相同的,油泵可作油马达使用,油马达也可作油泵使用。而阀式油泵和油缸则不能互相代替。在液压系统中,油泵是用来输送高压液体的,称为能源机构,油马达是用来带动外部负荷工作的,称为执行机构。
Oil pumps and oil motors are important components of a hydraulic system. An oil pump is a mechanism that converts mechanical energy into liquid energy, and an oil motor is a mechanism that converts liquid into mechanical energy. The oil pump is equivalent to the generator in the electric drive and the oil motor is equivalent to the electric motor. In general, the positive displacement oil pump and the oil motor are the same in structure, the oil pump can be used as the oil motor, and the oil motor can also be used as the oil pump. The valve pump and cylinder can not replace each other. In the hydraulic system, the pump is used to transport high-pressure liquid, known as the energy agency, the oil motor is used to drive external load work, called the implementing agencies.