A method for limiting the synchronous limit of an actuator

Abstract

A limiting method for synchronous limit of actuating cylinders is characterized in that an unloading oil passage is additionally arranged on a high-pressure inlet loop, when strokes of the actuating cylinders exceed a design permissible value, the unloading oil passage is connected to enable high-pressure oil to directly flow back, and therefore the actuating cylinders are prevented from keeping on stretching out or retracting, and a moving mechanism driven by the actuating cylinders is protected from damage because of the actuating cylinders. When the stroke L of each actuating cylinder is greater than a design permissible maximum value, namely L is greater than or equal to Lmax, the unloading oil passage is open, the high-pressure oil is enabled to directly flow back through the unloading oil passage to lower inlet oil pressure when the actuating cylinders stretch out, and therefore the actuating cylinders are prevented from keeping on stretching out; and when the stroke L of each actuating cylinder is less than a design permissible minimum value, namely L is less than or equal to Lmin, the unloading oil passage is open, the high-pressure oil is enabled to directly flow back through the unloading oil passage to lower the inlet oil pressure when the actuating cylinders retract, and therefore the actuating cylinders are prevented from keeping on retracting. The limiting method for the synchronous limit of the actuating cylinders has the advantages that the situation that the actuating cylinders synchronously exceed the design permissible limit value and keep on working can be effectively prevented so that the effect that a nozzle moving mechanism is protected from damage is achieved.

Description

technical field [0001] The invention relates to the field of hydraulic and pneumatic drives, and is mainly applied to the synchronous limit limit of an aero-engine vectoring nozzle actuator, and is also applicable to other fields with similar functions, and particularly relates to a method for synchronous limit limit of an actuator. Background technique [0002] The existing aero-engine vector actuator realizes the vector deflection of the vector nozzle and the adjustment of the outlet area. When the vector actuator moves asynchronously, the vector deflection is realized, and when the vector actuator moves synchronously, the outlet area is adjusted. The stroke of the moving cylinder is in the basic middle position, and the outlet area can be adjusted when it moves synchronously, but when the synchronous stroke exceeds the design allowable limit value and fails to reach the mechanical limit, it may cause damage to the driven motion mechanism, resulting in the failure of the no...

AI Technical Summary

Problems solved by technology

[0002] The existing aero-engine vector actuator realizes the vector deflection of the vector nozzle and the adjustment of the outlet area. When the vector actuator moves asynchronously, the vector deflection is realized, and when the vector actuator moves synchronously, the outlet area is adjusted. The stroke of the moving cylinder is in the basic middle position, and the outlet area can be adjusted when it moves synchronously, but when the synchronous stroke exceeds the design allowable limit value and fails to reach the mechanical limit, it may cause damage to the driven motion mechanism, resulting in the failure of the nozzle. Normal work, affect the use of the engine

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