Turning gradient control valve

Abstract

The invention discloses a turning gradient control valve, which is designed to provide a two-functional turning gradient control valve which can absorb vibration of the system, has low noise and energy saving, and can be applied to a static signal type and a dynamic signal type, wherein a first hole (P) in communication with a first throttle groove (4a1) and a second throttle groove (4a2) of a second hole (CF) is arranged on a beading at the right side along the circumference direction; the first hole (P) is in communication with a third throttle groove (4b1) and a fourth throttle groove (4b2) of a third hole (EF), wherein the first throttle groove (4a1) and the second throttle groove (4a2) are matched with a throttle side (5a) of a first sunken cutting groove of a valve body (5a) to form a valve port through which the first hole (P) is led to the second hole (CF); the third throttle groove (4b1) and the fourth throttle groove (4b2) are matched with a throttle side (5b) of a second sunken cutting groove of the valve body (5) to form a valve port through which the first hole (P) is led to the third hole (EF); the left end of the valve core (4) is provided with an asymmetric composite damper (3) while the right end of the valve core (4) is provided with a first damping hole (6).

Description

technical field [0001] The invention relates to a hydraulic steering priority valve used in traveling machinery. Background technique [0002] There is a situation in the hydraulic system of mobile machinery that a single pump supplies oil to multiple working mechanisms at the same time. At this time, for driving safety, it is necessary to ensure that the steering hydraulic circuit has priority over other hydraulic working circuits to obtain hydraulic energy supply. Under this background, the hydraulic steering priority valve can be used widely used. The smoothness, rapidity and reliability of the distribution or switching of hydraulic energy between the steering circuit and other working circuits in the hydraulic system of mobile machinery directly determine the comfort, control characteristics, energy saving and reliability of the main engine operation, and the steering priority valve is The key device that determines the above performance. At present, the spool valve po...

AI Technical Summary

Problems solved by technology

At present, the spool valve port of the hydraulic steering priority valve mostly adopts a non-full-circumference opening with a small opening, that is, a throttle groove structure, and a full-circumference opening form with a large opening. This structure has a sudden change in the area of ​​the valve port, resulting in a sudden change in the flow rate, which is easy Cause steering hydraulic shock, system vibration, noise, system power consumption and other problems. In addition, the movement damping of the valve core during the reversing process can only be guaranteed by setting a single damping hole, which cannot fully match the asymmetry of the valve core's two-way movement. In addition, The existing hydraulic steering priority valve only considers the static signal type or the dynamic signal type, and does not consider the easy modification of the structure between the two, which reduces the universality of the components

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