The supercharger is essentially a kind of hydraulic amplifier. In the hydraulic system, if the whole system needs low pressure and local or a branch needs high pressure, the supercharger can be used to make the local oil circuit or an executive component of the system obtain high pressure oil several times (2 ~ 7 times) higher than the working pressure of the hydraulic pump, so as to meet the needs of the local working mechanism, and it is not necessary to set it separately, which is expensive In this way, the energy consumption, equipment and system can be reduced and the system can be simplified.

Commonly used superchargers are divided into single acting and double acting. Single acting supercharger can only output high-pressure oil intermittently, while double acting supercharger can continuously output high-pressure oil. Their common characteristics are composed of low-pressure cylinder, high-pressure cylinder, large and small pistons, electromagnetic directional valve and signal device controlling electromagnetic directional valve; low-pressure oil is input into large piston end, and output is from small piston end High pressure oil. The commutation of supercharger is realized by frequent change of solenoid valve. If the solenoid valve reverses frequently, the solenoid coil will overheat when it works for a long time, which not only affects the performance of the valve, but also causes the oil temperature to rise. In addition, when the solenoid valve is far away from the power supply, it is still necessary to set a separate circuit for the supercharger.

How to simplify the system, research and explore a new way of turbocharger commutation is a new topic that people have been paying attention to.

Composition of hydraulic control double acting supercharger

The hydraulic control double acting supercharger is a kind of self reversing double acting supercharger. It cancels the electromagnetic directional valve of traditional supercharger and the transmitting device of controlling the electromagnetic directional valve. The cartridge valve is used as the main reversing valve, and the small flow two position four-way hydraulic directional valve is used as the pilot valve. There are two small holes in the cylinder body of the low-pressure cylinder. The position relationship between the large piston and the small hole is used to change the pilot

The position of the valve controls the action of the main valve to realize the reversing of the supercharger.