Construction machinery power adjustment method and hydraulic power system based on displacement detection

Abstract

The invention discloses a construction machinery power adjustment method based on displacement detection, comprising the following steps: detecting the displacement of the piston rod of the executive hydraulic cylinder; detecting the working load of the executive mechanism; Adjust the hydraulic pressure of the construction machinery hydraulic system. The invention also discloses a hydraulic power system for engineering machinery, including a main pump, a main control valve, an executive hydraulic oil cylinder and a controller. The main pump provides pressure liquid for the executive hydraulic cylinder through the main control valve, and the executive hydraulic cylinder is provided with The displacement sensor is used to detect the displacement of the piston rod of the hydraulic cylinder; the oil circuit in the rodless chamber of the hydraulic cylinder is equipped with a pressure sensor, and the controller can adjust the hydraulic pressure of the main pump according to the displacement of the piston rod of the hydraulic cylinder and the load pressure of the actuator. force. The invention can automatically adjust the liquid supply pressure of the hydraulic system according to the working state of the engineering machinery, has good power adaptability, and is energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to a hydraulic control system, in particular to a displacement detection-based engineering machinery power adjustment method. In addition, the invention also relates to a hydraulic power system. Background technique [0002] Construction machinery refers to the mechanical equipment used in earthwork construction projects, road surface construction and maintenance, lifting and unloading operations, and mechanized construction of construction projects. The power required by construction machinery in different construction operations often varies greatly. Therefore, construction machinery usually uses different control modes under different construction conditions to maximize the engine's power and achieve higher operating efficiency. In general working conditions, fuel economy is usually emphasized; while in some working conditions, it is necessary to pay attention to control coordination and operation precision. [0003] Construc...

AI Technical Summary

Problems solved by technology

However, the setting of multiple power control modes will put forward higher skill requirements for the construction machinery operators to choose the power mode. The wrong power mode will lead to wrong power matching, which will affect the operability and operation effect of the construction machinery.

However, it is very subjective to choose the matching power mode according to different working conditions, and requires the operator to accumulate long-term experience and constantly adjust according to changes in working conditions.

It not only reduces the control performance of construction machinery, but also causes construction machinery to often work in the wrong power mode, which affects the working efficiency of construction machinery, causes waste of fuel, and aggravates environmental pollution

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