How Hydraulic Pumps Work

Hydraulic pump is an energy conversion equipment, which converts mechanical energy into hydraulic energy, is a power element in the hydraulic transmission system, and provides pressure oil for the system. The size of the seal volume A is periodically changed. When A changes from small to large, it forms a partial vacuum, so that the oil in the tank enters the oil cavity A through the check valve 6 at the top of the oil suction pipe under the action of atmospheric pressure and completes oil absorption; Conversely, when A changes from large to small, the oil sucked in the A cavity will flow into the system with the top open check valve 5 and finish the pressurized oil. In this way, the hydraulic pump converts the mechanical energy input by the prime mover into the pressure energy of the liquid, and the prime mover drives the eccentric wheel to rotate continuously, and the hydraulic pump continuously absorbs oil and presses oil. Characteristics of the hydraulic pump 1, there are several seals and can be changed periodically. The output flow of the pump is proportional to the volume change in this space and the number of changes per unit time, and is independent of other factors2. The definite pressure of the liquid in the tank must be equal to or greater than the atmospheric pressure. This is the external condition under which positive displacement hydraulic pumps can suck in oil. Therefore, in order to ensure that the hydraulic pump can absorb oil normally, it is necessary for the oil tank to communicate with the atmosphere, or choose a closed sub-filling tank. 3. Have corresponding distribution arrangement. The suction tank and the discharge tank are separated to ensure that the hydraulic pump continuously sucks and drains the liquid cam in a regular manner, and the motor rotates by the strand. When the cam pushes the plunger upward, the sealing volume formed by the plunger and the cylinder block is reduced, and the oil is extruded from the sealing volume and discharged through the check valve to the local demand. When the cam rotates to the descending part of the curve, the spring forces the plunger downward, forming a certain vacuum degree, and the oil in the tank enters the sealing volume under the action of atmospheric pressure. The cam makes the plunger continuously lift and lower, the sealing volume periodically decreases and increases, and the pump continuously sucks and drains oil.