Hydraulic system oil pump constant-power control system

Abstract

The invention discloses a hydraulic system oil pump constant-power control system which comprises a master control unit, a main oil pump, an engine, an electrical control loop for adjusting the outletpressure of the main oil pump, and a pressure sensor for detecting an outlet of the main oil pump. The maximum pressure value and maximum flow value of the main oil pump are set in the master controlunit, the maximum pressure value and the maximum flow value guarantee that the rotating speed of the engine is not a value in a low rotating speed area, and when the outlet pressure of the main oil pump is larger than the maximum pressure value, the preset maximum pressure value can be adopted as the outlet pressure of the main oil pump by the master control unit; then the flow of the main oil pump is controlled according to the maximum pressure value; when the flow of the main oil pump is larger than the maximum flow value, the preset maximum flow value can also be adopted as the flow of themain oil pump by the master control unit, the outlet pressure of the main oil pump is controlled according to the maximum flow value, the constant power of the main oil pump is guaranteed, and it isguaranteed that the main oil pump gives play to the optimum performance; and it is further guaranteed that the engine cannot be flamed out easily.

Description

technical field [0001] The invention relates to the technical field of hydraulic system oil pump control, in particular to a hydraulic system oil pump constant power control system. Background technique [0002] The hydraulic system oil pump is one of the cores of the entire hydraulic system. The hydraulic system oil pump provides power to the entire hydraulic system. In order to ensure the hydraulic system generator has a large flow rate at low pressure and a small flow rate at high pressure, a constant power hydraulic system oil pump is generally required to achieve , the traditional constant power hydraulic system oil pump mainly realizes the constant power through the power control valve. It will exceed the set value to prevent engine overload, and the precise hyperbolic characteristics of the power control valve can maximize the use of engine power. [0003] However, the realization of the constant power of the oil pump of the hydraulic system through the power control...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention proposes a hydraulic system oil pump constant power control system, which can solve the problem that the existing oil pumps that control the hydraulic system oil pumps with constant power through the power control valve cannot exert the best performance, the engine is easy to turn off, and the constant power point of the oil pump cannot be real-time. defect such as change

Images