Winch hydraulic system applicable to crawler crane

Abstract

The invention discloses a winch hydraulic system applicable to a crawler crane. The winch hydraulic system comprises a control oil way, a high pressure oil way, a control oil way metering pump, a main pump, a one-way valve, a fourth solenoid directional valve, a high pressure accumulator, an engine, a third solenoid directional valve and a low pressure accumulator; the control oil way metering pump is arranged on the control oil way; the main pump, the one-way valve, the fourth solenoid directional valve and the high pressure accumulator are arranged on the high pressure oil way; a driving shaft of the engine is connected with the control oil way metering pump and the main pump; the engine and the main pump are used for supplying power to the crawler crane jointly; the third solenoid directional valve is connected with the low pressure accumulator and an outlet of the control oil way metering pump; the low pressure accumulator is used for stabilizing the pressure of the control oil way; an outlet of the main pump is connected with the one-way valve; the fourth solenoid directional valve is connected with the one-way valve and the high pressure accumulator; and the high pressure accumulator is used for recovering and storing potential energy of a weight when the weight drops, so as to be used for winch movement.

Description

technical field [0001] The invention belongs to the related field of cranes, and more specifically relates to a winch hydraulic system suitable for crawler cranes. Background technique [0002] The crawler crane is a mobile crane that installs the lifting part on the crawler chassis and relies on the crawler device for walking. It can carry out operations such as material lifting, transportation, loading and unloading, and installation. Crawler cranes have the advantages of small grounding specific pressure, small turning radius, adaptability to harsh ground, large climbing capacity, good lifting performance, no need for outriggers for lifting operations, and can walk with load, etc. Add special devices to become grab cranes, electromagnetic cranes or piling machines, etc., to realize one machine with multiple functions, and perform pile and earthwork operations. It is widely used in electric power construction, municipal construction, bridge construction, petrochemical, wat...

AI Technical Summary

Problems solved by technology

[0003] However, due to the large change in the working load of the crane and the large change in the load power, when the heavy object falls, the potential energy of the heavy object decreases sharply and is lost in vain, which cannot be effectively used, resulting in energy waste and reduced utilization.

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