Characteristics and types of vane pumps

The structure of the vane pump is more complicated than that of the gear pump, but its working pressure is higher, and the flow pulsation is small, the work is stable, the noise is smaller, and the service life is longer. Therefore, it is widely used in medium and low pressure hydraulic systems such as special machine tools and automatic lines in machinery manufacturing, but its structure is complex, its oil absorption characteristics are not very good, and it is also sensitive to oil pollution.

According to the difference in the number of oil suction and discharge of each sealed working volume in one revolution of the rotor, the vane pump is divided into two types, that is, the single-acting vane pump that completes one suction and discharge of oil and the double-action vane pump that completes two suction and discharge of oil vane pump. Single-acting vane pumps are mostly used for variable displacement pumps, and the maximum working pressure is 7.0MPa. Double-acting vane pumps are quantitative pumps, and the maximum working pressure is generally 7.00Pa. The maximum working pressure of the high-pressure vane pump with improved structure can reach 16.0～ 21. OMPa.