Control system and method for solving rotation starting impact of crane

Abstract

The invention relates to a control system and method for solving rotation starting impact of a crane, comprising a pilot electric handle, a controller, a proportional pressure reducing valve, a gear pump, an overflow valve, an engine, a three-position five-way electro-hydraulic proportional reversing valve, a one-way valve, a hydraulic motor, a safety valve, a load and a hydraulic oil tank. In the starting stage of a crane rotating platform, before starting, the rotational inertia of the rotating platform is calculated, the angular acceleration of the rotating platform is selected according to experience, and therefore the starting pressure of the starting stage can be calculated in a theoretical mode, and the maximum pressure corresponds to the opening degree of a valve port of the starting stage; when the valve element moves to the opening degree of the valve port corresponding to the pressure, a control signal of the control valve element is subjected to fixed value delay; when the rotating platform starts to rotate, the fixed value delay time is over, and the controller outputs an original control signal curve, that is, the opening degree of the valve port is matched with the load. By solving the matching problem of different loads and the valve port, the problem that pressure overshoot is inconsistent with a flow rising curve when the loads are different can be effectively solved.

Description

technical field [0001] The invention relates to the field of engineering technology, in particular to a control system and method for solving the impact of crane slewing start. Background technique [0002] With the rise of the infrastructure construction industry, more and more construction machinery is being used, among which truck cranes are widely used due to their advantages of convenient movement and strong flexibility. [0003] The car crane is mainly composed of lifting, luffing, slewing, boom and car chassis. Due to the development of hydraulic technology, electronics industry, high-strength steel and automobile industry, the development of truck cranes has been promoted. The mechanical transmission truck crane with heavy weight and long work preparation time has been replaced by hydraulic truck crane. [0004] The hydraulic system of the hydraulic truck crane uses hydraulic pumps, quantitative or variable motors to realize the lifting and turning of the crane, lu...

AI Technical Summary

Problems solved by technology

[0011] In view of the above problems, the object of the present invention is to provide a control system and method for solving the impact of crane slewing start-up, which can fundamentally solve the problem of pressure overshoot in the start-up stage of the crane slewing system without changing the existing hydraulic system of the crane , and when the trajectory of the handle is the same, the problem that the flow rate rise curve is inconsistent under different working conditions

Images