Counterweight slipping control method and system

Abstract

The invention discloses a counterweight slipping control method and system. The method comprises the following steps that firstly, position signals of a counterweight in the sliding process are detected in real time; secondarily, according to the position signals, the distance between the counterweight and the preset working position is judged according to the position signals, hydraulic oil flow instructions are sent to a flow control component according to a judgment result, and therefore the flow of hydraulic oil flowing into a counterweight oil cylinder is controlled. According to the control method, the flow of the hydraulic oil in the counterweight oil cylinder can be controlled according to the position of the counterweight in the sliding process, and therefore the sliding speed of the counterweight is controlled, before the counterweight collides with a car frame, the counterweight stops at the low speed, the large impact between the counterweight and the car frame is effectively avoided, and the reliability and safety of the system are improved.

Description

technical field [0001] The invention relates to the technical field of counterweight control, in particular to a method and system for controlling counterweight slippage. Background technique [0002] The existing crane is generally provided with a balance weight, which can balance the weight lifted by the crane to ensure the balance of the whole vehicle. Generally, the farther the balance weight of the same weight is from the lifting side, the higher the lifting capacity of the crane will be. [0003] In order to increase the lifting capacity of the crane, the position of the balance weight on the crane is designed as a position-adjustable structure. According to the lifting working conditions of the crane, the balance weight installed on the crane can be horizontally moved to a suitable position. [0004] The sliding of the counterweight of the traditional crane is realized through the hydraulic control system of the counterweight sliding. At present, the quantitative pu...

AI Technical Summary

Problems solved by technology

[0006] However, when the balance weight moves to the end point (full extension or full retraction), the mechanical collision between the balance weight and the frame will cause the balance weight to stop quickly, and the movement speed of the balance weight will directly decrease from the maximum to zero, and the rate of change is relatively large. The impact is large, which affects the safety of the whole vehicle, and the overflow valve of the hydraulic system has been overflowing at high pressure and large flow, resulting in large system power loss and high temperature rise

[0007] In addition, due to the same flow rate of the system, there is an area ratio of the balance heavy cylinder, which leads to a faster shrinking movement and poor controllability

Images