Damping balance valve

Abstract

The invention discloses a damping balance valve. The damping balance valve comprises a valve body with a balance valve core group, wherein the balance valve core group is provided with a damper; an one-way throttle valve combination which has a buffering function so as to improve the action smoothness of the balance valve core group and is provided with a dismountable damper is mounted in the valve body; the one-way throttle valve combination with the dismountable damper consists of two one-way throttle valves with dismountable dampers, which are mounted in the valve body in a symmetrical manner; in the valve body, a hole is drilled downwards in the upper end of a left end surface relatively close to the valve body, so that a channel A used as a main working oil channel extending downwards is formed; a hole is drilled downwards in the upper end of a right end surface relatively close to the valve body, so that a channel B used as a main working oil channel extending downwards is formed; a channel C which extends upwards and is used as a main control oil channel, and a channel D which extends upwards and is used as a main control oil channel are symmetrically formed in a punching manner in the left side and the right side of the center line in the valve body; a balance valve cavity penetrating through the channel A, the channel C, the channel D and the channel B sequentially is horizontally formed in the left end surface of the valve body. The damping balance valve is simple in structure and high-efficient in performance, and can effectively weaken the pressure peak generated by hydraulic pressure fluctuation, so that the whole system can stably run.

Description

technical field [0001] The invention relates to the hydraulic control technology of engineering machinery, in particular to a balance valve applied to a full-hydraulic walking wheel excavator or a loader, in particular to a damping balance valve. Background technique [0002] At present, most of the wheeled excavators and loaders adopt the mechanical walking type, that is, the tires are directly driven by the diesel engine through the drive axle and gearbox. Due to its shortcomings such as high energy consumption and poor controllability, manufacturers at home and abroad are looking for a way to start and stop softly, save energy, and have good controllability. The motor drives the tires through the transaxle. However, in actual operation, due to the lack of a suitable balance valve, the full hydraulic travel system is not enough in the process of oil circuit switching, which often leads to problems of large hydraulic impact force and high pressure vibration, so the control...

AI Technical Summary

Problems solved by technology

Due to its disadvantages such as high energy consumption and poor controllability, manufacturers at home and abroad are looking for a way to start and stop softly, save energy, and have good controllability. The mode in which the motor drives the tires through the drive axle

However, in actual operation, due to the lack of a suitable balance valve, the full hydraulic travel system is not enough in the process of oil circuit switching, which often leads to problems of large hydraulic impact force and high pressure vibration, so the controllability is still not ideal

Images