Constant pressure variable pump system and energy saving method

Abstract

The invention relates to a constant pressure variable pump system and an energy saving method. The constant pressure variable pump system is composed of a plurality of pump set units. Each pump set unit is connected with an oil supply system body and composed of a constant pressure variable pump, a control slide valve, an overflow valve, an electromagnetic directional valve, a one-way valve, a first ball valve, a second ball valve and a third ball valve, wherein the constant pressure variable pump, the overflow valve, the one-way valve, the first ball valve and the oil supply system body are sequentially connected; the control slide valve is connected to the constant pressure variable pump; opening and closing of the overflow valve are controlled through the electromagnetic directional valve; the control slide valve is connected with the oil supply system body through the second ball valve; and the electromagnetic directional valve is connected with the oil supply system body through the third ball valve and the second ball valve in sequence. The constant pressure variable pump system and the energy saving method have the advantages that the pump set units are improved, and the ball valves are added, so that unicontrol of the pump set units is achieved; and by improving the control process, energy waste of the constant pressure variable pump during standby is reduced, and accordingly the service life of oil fluid is prolonged.

Description

technical field [0001] The invention relates to a constant pressure variable pump system and an energy saving method. Background technique [0002] With the improvement of people's living standards, human beings' demand for energy is increasing, and the pollution of the environment is becoming more and more intolerable. Energy conservation and emission reduction have become the consensus of all mankind. Hydraulic systems are commonly used in the production process of large industries such as metallurgy, and the proportion of energy consumption of hydraulic systems is increasing. In a hydraulic system using a constant pressure variable pump, when the system is not working temporarily, the swash plate of the hydraulic pump is automatically at such a swash plate angle that the oil discharged from the hydraulic pump just meets the leakage (internal leakage) of the hydraulic pump. With the increase of the service time of the hydraulic pump, the internal leakage of the hydraulic ...

AI Technical Summary

Problems solved by technology

The disadvantage is: when the external pump station does not need to supply oil, the oil discharged by the hydraulic pump just meets the leakage (internal leakage) of the hydraulic pump, which wastes energy and causes the oil to heat up and deteriorate, reducing the life of the oil

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