A gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gear to convey or pressurize the liquid. The plunger pump is an important device of the hydraulic system. It relies on the reciprocating movement of the plunger in the cylinder to change the volume of the sealed working cavity to achieve oil absorption and oil pressure. These two devices are often used in oil cylinders. Which one is better to use in the oil cylinder? The gear pump is not sensitive to oil pollution, but the pressure rise is not too high. It has a simple structure, convenient maintenance, and is not sensitive to oil pollution. If it is used in a system of about 160BA, it is a good choice, but the flow output of the gear pump is much smaller. In the case of the same shape and structure, the pressure fluctuation is centered between the three. The pump oil mechanism of a plunger pump includes two sets of precision couplers: a plunger and a plunger sleeve constitute a plunger coupler, an oil outlet valve and an oil outlet valve seat constitute an oil outlet valve coupler. The plunger and the plunger sleeve are a pair of precision parts. They cannot be interchanged after being ground and matched. They require high accuracy and smoothness and good wear resistance. The direction hole and the axial hole communicate with the top, the purpose of which is to change the recirculation oil supply; there are inlet and return holes on the plunger sleeve, which communicate with the low-pressure oil cavity in the upper body of the pump. Apply positioning screws. Depending on the position of the chute of the plug head, the method of changing the oil supply amount is different. In other words, gear pumps are limited by the pressure system used in oil cylinders, while plunger pumps are not limited in any way by oil cylinders, so which of these two devices is better, I think everyone should understand it!
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