Vane Pump Applications And Development Trends

Traditionally, vane pumps, especially variable vane pumps, are mostly used in fixed installations of industrial and mining equipment and ships, but in recent years, many mobile machinery has also been equipped with high-pressure quantitative vane pumps.

Various metal processing machine tools widely use vane pumps as the source of hydraulic oil. Their hydraulic systems generally have low power and medium working pressure, and require hydraulic pumps with stable output flow, low noise and long life, which is in line with vane pumps. specialty. The double vane pump composed of two units with different displacements can be superimposed and switched to obtain three different flow rates, which is very suitable for those processing equipment with very different feed and return speed.

Various small and medium-sized forging, punching, casting, rubber and plastic molding equipment have a large load change in a working cycle, and it is often necessary to "hold pressure" on the processing object or mold. A variable vane pump with pressure compensation function can be used. The energy-saving operation method meets these requirements, and the cost is low. However, due to the increase in working pressure of the hydraulic system in the new generation of equipment and the considerable progress of other components in reducing noise and manufacturing costs, the application of variable vane pumps in this field has slightly decreased. For various reasons, the variable vane pump belongs to the hydraulic pump components that have the least obvious technological progress in the past 20 years. Compared with modern variable plunger pumps, variable vane pumps have obvious gaps in pressure, speed, power, efficiency and optional variable methods, and there are few varieties. Except for lower prices and slightly better self-priming capacity, they are almost There are no other advantages at all. Its scope of application is shrinking. Following this trend, a considerable part of variable vane pumps will inevitably be replaced by variable vane pumps or variable-speed vane pumps and internal gear pumps driven by variable plunger pumps or variable speed motors with better overall performance and more varied adjustment methods.

Contrary to variable vane pumps, the new high-performance quantitative vane pump not only maintains and develops its position in the field of industrial hydraulics, but also occupies many mobile machinery with its advantages of small size, light weight, low noise and long life. It originally belonged to the market of external gear pumps. Especially in the field of car hydraulic steering assist system has formed a great advantage. In addition, the application in construction machinery, heavy vehicles, marine deck machinery, aerospace equipment is also increasing. Together with internal gear pumps, they will become the mainstream products of high-performance quantitative hydraulic pumps in the future.

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