Modification of vane pump in hydraulic system

The vane pump should have the characteristics of small volume, light weight and excellent performance. However, since the operation in October 1992, there have been many faults such as vibration, noise, pressure, pressure fluctuation, etc., and “automatic operation” is required to switch to “hand” during maintenance. The shaking operation increases the labor intensity of the workers and causes fluctuations in the operation of the device. In order to ensure the safe and reliable operation of the electro-hydraulic slide valve, in the overhaul of the catalytic device in June 1994, we modified the vane pump.
Analysis of the cause of failure of vane pump
When the rotor rotates in the direction of the arrow, the blade gradually protrudes as the rotor rotates in the oil suction zone (lower part of the rotor), and the sealing volume of the blade gradually increases, causing partial vacuum and filling with oil, when the cavity reaches the maximum In the case of the volume, the distribution plate separates it from the suction side to complete the oil absorption process. Then, it is connected to the oil discharge side, the rotor continues to rotate, and the inner curved blade of the stator enters the groove again, and the cavity volume becomes smaller. According to this, the oil is pressed into the oil discharge port to realize the oil discharge process.

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