A transmission device (1) includes a casing (2) accommodating a transmission gear (4) and having an oil sump (6) for retaining oil (OL). The oil (OL) in the oil sump (6) flows from a lubrication pump (8) through a lubrication passage (10) and is injected to the transmission gear (4). A connection portion (32) is provided in a part of the lubrication passage (10), which part is disposed outside the casing (2). A direction control valve (14) is provided downstream of the lubrication pump (8) and upstream of the connection portion (32) in the lubrication passage (10) with respect to a flow direction of the oil. The direction control valve (14) is configured to open the lubrication passage (10) when a hydraulic pressure (PI) in the lubrication passage (10) exceeds a predetermined value (VI) and to close the lubrication passage (10) when the hydraulic pressure is equal to or lower than the predetermined value (V1).
POWER TRANSMISSION DEVICE FOR HELICOPTER
KRAFTÜBERTRAGUNGSVORRICHTUNG FÜR HUBSCHRAUBER
DISPOSITIF DE TRANSMISSION DE PUISSANCE POUR HÉLICOPTÈRE
2023-02-22
Patent
Elektronische Ressource
Englisch
Europäisches Patentamt | 2017
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