What is the working principle of hydraulic hand pump？

Working principle of hydraulic hand pump: the cam is rotated by the electric motor. When the cam pushes the plunger to move upward, the sealing volume formed by the plunger and the cylinder decreases, and the oil is squeezed out from the sealing volume and discharged to the required place through the one-way valve. When the cam rotates to the descending part of the curve, the spring forces the plunger downward to form a certain vacuum, and the oil in the oil tank enters the sealed volume under the action of atmospheric pressure. The cam makes the plunger rise and fall continuously, the sealing volume decreases and increases periodically, and the pump continuously absorbs and discharges oil.

  The function of the manual hydraulic pump is to convert the mechanical energy of the power machine (such as electric motor and internal combustion engine, etc.) into the pressure energy of the liquid.

  The working principle of the manual hydraulic pump is the same as that of the air pump. When the piston rod is stretched out, the one-way valve on the oil suction channel is opened, and the one-way valve on the oil discharge channel is closed to complete the oil suction process. When the piston rod retracts , the one-way valve on the oil suction channel is closed, and the one-way valve on the oil discharge channel is opened to complete the oil discharge process.

  The main function of the manual hydraulic pump is to make the actuator reach a certain position through the manual hydraulic pump when there is no power source or the power source fails.