隔膜泵是容积泵中较为特殊的一种形式。它是依靠一个隔膜片的来回鼓动而改变工作室容积来吸入和排出液体的。 Diaphragm pump is a more special form of volume pump. It relies on the agitation of a diaphragm to change the volume of the chamber to absorb and drain the liquid. 气动隔膜泵主要由传动部分和隔膜缸头两大部分组成。传动部分是带动隔膜片回来鼓动的驱动机构，它的传动形式有机械传动、液压传动和气压传动等。其中应用较为广泛的是液压传动。隔膜泵的工作部分主要由曲柄连杆机构、柱塞、液缸、隔膜、泵体、吸入阀和排出阀等组成，其中由曲轴连杆，柱塞和液缸构成的驱动机构与往复柱塞泵十分相似。 Pneumatic diaphragm pump mainly by the transmission part and diaphragm cylinder head of two major parts. The driving part is the driving mechanism that drives the diaphragm to come back, and its drive forms include mechanical drive, hydraulic drive and pneumatic transmission. Among them, hydraulic drive is widely used. Diaphragm pump work is mainly composed of a crank connecting rod mechanism, hydraulic cylinder, piston, diaphragm, pump, suction valve and discharge valve, which is composed of a crankshaft connecting rod, piston and cylinder of the driving mechanism and the reciprocating piston pump is very similar. 隔膜泵工作时，曲柄连杆机构在电动机的驱动下，带动柱塞作往复运动，柱塞的运动通过液缸内的工作液体(一般为油)而传到隔膜，使隔膜来回鼓动。 When the diaphragm pump works, the crank connecting rod mechanism drives the plunger to reciprocate under the drive of the motor. The movement of the plunger is transmitted to the diaphragm through the working fluid (usually oil) in the liquid cylinder, so that the diaphragm moves back and forth. 气动隔膜泵缸头部分主要由一隔膜片将被输送的液体和工作液体分开，当隔膜片向传动机构一边运动，泵缸内工作时为负压而吸入液体，当隔膜片向另一边运动时，则排出液体。被输送的液体在泵缸内被膜片与工作液体隔开，只与泵缸、吸入阀、排出阀及膜片的泵内一侧接触，而不接触柱塞以及密封装置，这就使柱塞等重要零件完全在油介质中工作，处于良好的工作状态。 Pneumatic diaphragm pump cylinder head is mainly composed of a diaphragm liquid is transported and liquid separately, when the diaphragm to the side of the transmission mechanism, working pump cylinder for pressure and suction liquid, when the diaphragm to the other side of the movement, then discharged liquid. The conveyed liquid is separated from the diaphragm and the working fluid in the pump cylinder, and a pump cylinder, a suction valve, discharge valve and diaphragm pump side contact, and contact the plunger and sealing device, which makes the important parts such as the plunger fully working in oil medium, in good working state.