Intelligent buffering and overflowing device

Abstract

The invention provides an intelligent buffering and overflowing device. A hydraulic oil tank (1) is communicated with a reversing valve (2) through a hydraulic pump; a first working oil opening A of a control valve is communicated with one end of a rotary motor (3) through a first executing oil opening C1; a fifth check valve (4.4), a third check valve (4.2), a first direct-acting type overflowing valve (5) and a first check valve (4) are connected between the first working oil opening A of the control valve and a pipeline of the rotary motor in parallel; the check valves and the direct-acting type overflowing valve are connected between a second working oil opening B of the control valve and the pipeline of the rotary motor by a second executing oil opening C2; an electric proportion flow control valve (6) is connected among the four check valves in parallel; a main oil pipeline which is connected between the check valves and the direct-acting type overflowing valve in parallel is in pipeline communication with the hydraulic oil tank through an oil supplementing opening T. The hydraulic impact when a rotary drilling rig does rotary movement is reduced and the getting-on shaking amount when the rotary drilling rig rotates is reduced; the stability of a main engine is improved and the service life of related components is prolonged.

Description

technical field [0001] The invention relates to an intelligent buffer overflow device, in particular to an intelligent buffer overflow device for motion control of a rotary motor in a rotary mechanism, and belongs to the technical field of hydraulic control. Background technique [0002] At present, domestic and foreign crawler-type rotary drilling rigs use the hydraulic system to drive the slewing mechanism when getting on and off the car to achieve the purpose of slewing. The slewing mechanism is composed of a slewing motor, a reducer and a slewing support. The slewing motor supplies oil to realize the rotation of the motor, the slewing motor drives the slewing reducer to rotate, and the slewing reducer drives the slewing support to rotate to realize the slewing working conditions of getting on and off the car; a balance valve is usually connected between the slewing motor and the hydraulic system, The balance valve acts as a buffer when the swing motor starts and stops. ...

AI Technical Summary

Problems solved by technology

At present, the slewing balance valve used in China is composed of a one-way valve and a relief valve. The one-way valve allows oil to pass in one direction, and the reverse is closed; the relief valve allows the hydraulic oil circuit to open when the pressure is higher than the set pressure through the set pressure. Overflow, so as to achieve the purpose of protecting the working components, but the cushioning effect of this balance valve is poor, the rotary motor is prone to reverse under the pressure impact, and the load changes greatly at the moment of starting, braking and sudden change of direction when the drilling rig performs rotary action , frequent shocks and vibrations, due to the large moment of inertia of the upper vehicle, it will cause a large hydraulic shock, hydraulic shock will cause vibration and noise to the entire hydraulic system and components, and even cause damage to hydraulic components, thus affecting the whole machine The stability of the work increases the risk of the whole machine

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