Energy-saving method for positive flow of hydraulic system of loader

Abstract

The invention discloses an energy-saving method for the positive flow of a hydraulic system of a loader. A positive flow pump is arranged on a hydraulic pump; operation speeds of two hydraulic cylinders are controlled by controlling a control handle; the opening amount of a multi-path reversing valve is controlled by a hydraulic oil signal led from the control handle on one hand; a shuttle valve is arranged, controls the displacement of the positive flow pump by selection and adjusts the displacement of the positive flow pump to be in direct proportion to the opening amount of the multi-path reversing valve; the output flow of a positive flow control pump automatically adapts to the change of a pilot pressure control signal; and no central position unloading loss and overflow loss exist in the system. The energy-saving method disclosed by the invention has the beneficial effects that the a steering pump is facilitated to be reasonably utilized to enable the steering pump to be mutually matched with the load and increase the efficiency of the hydraulic system; the hydraulic system can quickly enter a normal work state; the integral work efficiency of the equipment is increased; and electric energy is saved.

Description

technical field [0001] The invention relates to the field of hydraulic technology, in particular to a positive flow energy-saving method for a hydraulic system of a loader. Background technique [0002] The hydraulic system is an important part of the loader. The basic actions of the loader, such as boom lifting, bucket turning, and machine steering, all need to be driven by the hydraulic system. During the use of the loader, the hydraulic system often has the problem of high oil temperature. According to the actual investigation, the high oil temperature of the hydraulic system when the loader is working is one of the main factors affecting the reliability of the hydraulic system and hydraulic components and the working efficiency of the whole machine. one. Therefore, ensuring that the heat balance temperature of the hydraulic system of the loader is in a normal state is the key to ensuring the reliable operation of the loader and improving the efficiency of the hydraulic ...

AI Technical Summary

Problems solved by technology

However, the main reason for the energy loss of the hydraulic system of many loader working devices is that the output flow and output pressure of the pump cannot match the flow and pressure required by the load, and there are more overflow losses, throttling losses and neutral unloading losses.