90R75 90R100 Original hydraulic valve Hydraulic pump high pressure relief valve

Working principle of hydraulic pump

    The working principle of the hydraulic pump is that the movement brings changes in the volume of the pump chamber, thus compressing the fluid so that the fluid has pressure energy. The necessary condition is that the pump chamber has a sealed volume change.

  Hydraulic pump is a hydraulic component that provides pressurized liquid for hydraulic transmission and is a kind of pump. Its function is to convert the mechanical energy of the power machine (such as electric motors and internal combustion engines, etc.) into the pressure energy of the liquid. Its CAM is turned by an electric motor. When the CAM pushes the plunger upward, the sealing volume formed by the plunger and the cylinder body is reduced, and the oil is extruded from the sealing volume and discharged to the required place through the check valve. When the CAM rotates to the falling part of the curve, the spring forces the plunger downward, forming a certain vacuum, and the oil in the 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 continues to suck and drain oil.

Hydraulic tank:

    The main function of the hydraulic tank in the hydraulic system is to store oil, dissipate heat, separate the air contained in the oil and eliminate foam. The selection of fuel tank must first consider its capacity, the general mobile equipment to take the maximum flow of the pump 2-3 times, fixed equipment to take 3 to 4 times; Secondly, consider the oil level of the tank. When all the hydraulic cylinders of the system are extended, the oil level of the tank shall not be lower than the lowest oil level, and when the cylinder is retracted, the oil level shall not be higher than the highest oil level. Finally, considering the structure of the oil tank, the traditional partition in the oil tank can not play the role of settling dirt, and a vertical partition should be installed along the longitudinal axis of the oil tank. There is an empty space between the partition end and the tank end plate so that the two sides of the partition space is connected, the oil inlet and outlet of the hydraulic pump is arranged on both sides of the disconnected end of the partition, so that the distance between the oil inlet and the oil return is the furthest, and the hydraulic tank plays some heat dissipation role.