An electro-hydraulic combined speed regulation slewing system and control method for a crane

Abstract

The invention discloses an electro-hydraulic combined speed regulation rotary system and a control method for a crane, comprising a hydraulic control handle, a control system, a rotary control valve, a rotary motor and a boom, by detecting the state of the hydraulic control handle and comparing the output of the hydraulic control handle The pressure and the steps of the pressure switch setting value regulate the swing operation. The invention has obvious effects, is convenient and practical, and can effectively reduce the impact when the handle is suddenly started and stopped when the handle is quickly pressed or reset, and improves the operating comfort; it reduces the shaking of heavy objects when the handle is suddenly started and stopped, and improves safety ;Reduce the shaking of heavy objects, and then reduce the load impact, and increase the service life of the whole machine.

Description

technical field [0001] The invention relates to a slewing system, which belongs to the field of engineering machinery, in particular to an electro-hydraulic combined speed-regulating slewing system for a crane and a control method. Background technique [0002] At present, the small and medium tonnage cranes generally adopt the full hydraulic pilot control mode, which has the advantages of low cost, simple control, high reliability and convenient maintenance compared with large tonnage electric control. However, according to the continuous improvement of market users' requirements for operating accuracy and operating comfort, some shortcomings are also reflected: because the hydraulic control pilot handle is completely controlled by manual control, the control method is relatively simple, the control curve is difficult to adjust, and the control is not flexible; for special The pilot operating system cannot meet the application requirements and different operating habits. D...

AI Technical Summary

Problems solved by technology

However, according to the continuous improvement of market users' requirements for operation accuracy and operation comfort, some shortcomings are also reflected: because the hydraulic control pilot handle is completely controlled by manual control, the control method is relatively simple, the control curve is difficult to adjust, and the control is not flexible; for special The pilot operating system cannot meet the application requirements and different operating habits

When turning, the handle quickly returns to the neutral position, and the action stops quickly, causing the whole vehicle to shake, which affects the smoothness, comfort and safety of the operation.

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