Expandable and high-reliability hydraulic lock

Abstract

Provided is an expandable and high-reliability hydraulic lock. A shell is provided with a main oil way connector and a control oil way connector and internally provided with control valve element mounting cavities and lock closing cavities used for mounting main valve elements; a control valve element is composed of two valve element bodies of different diameters, and the installation cavity provided with the valve element of the small diameter communicates with the corresponding lock closing cavity; the control oil way connector communicates with a lock opening control cavity and a lock closing control cavity through flow channels, the lock opening control cavity communicates with the corresponding control valve element mounting cavity through one flow channel and is located outside the outer end face of the control valve element body of the big diameter, and the lock closing control cavity communicates with the inner end face of the control valve element of the big diameter through one flow channel; the main valve elements are mounted in the lock closing cavities through reset springs and plugs, and the control valve element mounting cavities are sealed through plugs mounted on the shell; when the hydraulic lock is opened, the hydraulic lock opening control cavity is filled with high pressure oil, and the control valve element bodies push the main valve elements to move outwards, and the main oil way is opened; and when the hydraulic lock is closed, the lock closing control cavity is filled with high pressure oil, the control valve element bodies move outwards, and the main valve elements cut off the main oil way under the effect of the reset springs.

Description

technical field [0001] The invention relates to an expandable and highly reliable hydraulic lock, which is a highly integrated hydraulic component. Background technique [0002] Hydraulic locks are widely used in hydraulic circuits in aerospace, transportation machinery, and hoisting machinery to prevent misoperation of actuators under the action of external forces and play the role of locks. Lock, by controlling the oil circuit to control the opening and closing of the main spool of the hydraulic lock, so as to achieve the function of opening and locking the oil circuit. [0003] However, the current hydraulic lock still has the problem of unreliable locking caused by the opening of the main valve core caused by pressure fluctuations or the unreliable sealing of the main valve core, as well as the excessive locking pressure caused by accidents, resulting in damage to the hydraulic system or hydraulic lock. problems, as well as problems such as complex structure, poor manuf...

AI Technical Summary

Problems solved by technology

[0003] However, the current hydraulic lock still has the problem of unreliable locking caused by the opening of the main valve core caused by pressure fluctuations or the unreliable sealing of the main valve core, as well as the excessive locking pressure caused by accidents, resulting in damage to the hydraulic system or hydraulic lock. problems, as well as complex structure, poor manufacturability, complex external interface, etc.

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