How hydraulic pumps work

How hydraulic pumps work

The pump is an energy conversion device that converts the rotational mechanical energy of the motor into hydraulic energy for output. Hydraulic pumps work on the principle of sealing volume change, so they are generally called positive displacement hydraulic pumps. The plunger 2 is installed in the cylinder body 3 to form a sealing volume a, and the plunger is always compressed under the action of the spring 4. On eccentric 1. The prime mover drives the eccentric wheel 1 to rotate to make the plunger 2 reciprocate, so that the size of the sealed volume a changes periodically. When a changes from small to large, a partial vacuum is formed, so that the oil in the oil tank will open the one-way valve 6 through the oil suction pipe and enter the oil chamber a under the action of atmospheric pressure to realize oil absorption; on the contrary, when a changes from large to small, the oil in the chamber a The oil that has been sucked up will push open the one-way valve 5 and flow into the system to realize oil pressure. In this way, the hydraulic pump converts the mechanical energy input by the prime mover into the pressure energy of the liquid. The prime mover drives the eccentric wheel to rotate continuously, and the hydraulic pump continuously absorbs and presses oil.