Device for monitoring the sealing of a rotorcraft transmission box by suction
AssigneeEurocopter
InventorsDaniel Huillet, Vincent Quintric
Life of this patent
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Abstract
A device for monitoring the sealing state of a casing (2) of a transmission box (1) of a rotorcraft. An open airflow circuit (7) fitted with a suction generator member (10) is connected to a vent (5) of the casing (2). Regulator means (12) maintain stable suction in the airflow circuit (7) relative to a setpoint threshold (S), the regulator means being controlled in response to a pressure gauge (13) for measuring the suction generated inside the airflow circuit (7). The device is used on the ground to detect a source of leakage in the casing (2) and in flight to retain lubricant inside the casing (2) in the event of there being a source of leakage.
Claims18
A device for monitoring the sealing state of a casing housing lubricated moving members of a transmission box of a rotorcraft, wherein the device comprises:
- an airflow circuit open to the atmosphere at its downstream end, the airflow circuit having coupling means at its upstream end for coupling in leaktight manner to a vent of the casing, and being fitted with a suction generator member for generating suction inside the airflow circuit, operation of the suction generator member being under the control of control means;
- and
- regulator means for regulating said suction that is maintained stable inside the airflow circuit relative to a setpoint threshold (S), operation of the regulator means being controlled at least to depend on a pressure gauge for measuring the suction generated inside the airflow circuit.
Dependencies are inferred from the claim text.