GEAR EXTENSION EMERGENCY DRIVE WITH ADDITIONAL FEEDBACK Russian patent published in 2023 - IPC B64C25/30 B64C25/22 

FIELD: aircraft engineering.

SUBSTANCE: emergency landing gear systems. The gear extension emergency drive contains a hydraulic motor connected by a common shaft to the pump, a check valve, a throttle that converts the pressure in the pump discharge line when the actual load on the actuating hydraulic motors changes into the control pressure of a multi-position throttling hydraulic distributor connected to the hydraulic motor. Moreover, the emergency drive contains a device for additional feedback on the derivative of the pressure drop, including a hydraulic condenser. The condenser is made in the form of a spring-loaded piston, one cavity of which is connected to the executive hydraulic motors and to one of the cavities of the additional multi-position two-line hydraulic distributor through throttles. In this case, the other cavity of the hydraulic condenser is connected to the control cavity of the additional multi-position two-line hydraulic distributor connecting the hydraulic motor power line with the control cavity of the main multi-position throttling hydraulic distributor.

EFFECT: increased accuracy and stability of the hydraulic drive operation when operating at resonant frequencies, under the action of positional and inertial loads of a random nature.

1 cl, 1 dwg