Dynamic compaction buffer damping method of crawler crane

Abstract

The invention relates to a dynamic compaction buffer damping method of a crawler crane. A buffer damping device is arranged on the rear side of a suspension arm of the crawler crane, the rebounding kinetic energy of the suspension arm and the rebounding upward gravity center potential energy of the suspension arm are slowly released through a damping function, impacts to a machine body and the suspension arm due to repeated oscillation are stopped; the suspension arm is connected with one end of a back stay bar member, the other end of the back stay bar member is connected with the buffer damping device, the other end of the buffer damping device is connected with a triangular support of the crane, the buffer damping device comprises a stop valve and a buffer damping cylinder with two pistons, the front cavity and rear cavity of the cylinder are communicated by adopting the stop valve, and the stop valve is a bidirectional two-position two-way electromagnetic valve. According to the invention, the impact to the crane by the rebounding kinetic energy of the suspension arm during unhooking of a dynamic compaction hammer can be rapidly relieved, and the impacts to the machine body and the suspension arm due to the repeated oscillation of the suspension arm are stopped.

Description

technical field [0001] The invention belongs to the technical field of crawler cranes, and in particular relates to a method for reducing the rebound impact of crawler cranes used in dynamic compaction working conditions. Background technique [0002] When the crawler crane is used for the dynamic compaction of foundation treatment, when the rammer is lifted, the elastic deformation of the boom and the fuselage structure will accumulate a large amount of elastic potential energy, and the rebound of the boom will make the center of gravity upward to generate potential energy. The release of the potential energy of elastic denaturation when the rammer is unhooked will cause a strong rebound of the boom. The rebound kinetic energy of the boom will have a great impact on the boom and the machine platform, and the boom and the machine body will vibrate repeatedly for many times before they stop. This kind of shock and vibration is very harmful, and may cause cracks in the boom, ...

AI Technical Summary

Problems solved by technology

This shock and vibration is very harmful and may cause cracks in the boom, machine platform welds and stress concentration areas and premature damage to the slewing support

[0003] Most of the existing technologies use a door-shaped bracket installed on the boom head against the ground to reduce the elastic potential energy when lifting the rammer, but it takes a lot of work to move and adjust the door-shaped bracket every time the rammer is hit. Due to the repeated movement and adjustment of the door-shaped bracket, the operation is complicated, the efficiency is low, and it has a great impact on the safety of production; at the same time, because the door-shaped bracket occupies the space, the applicable occasions of the jack are limited.

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