Shaft mounted rotor brake

摘要

A shaft mounted rotor brake (7) with at least one braking force absorption element non-rotatable connected to said shaft (1). A stationary brake actuator (8, 24) is mounted to a rotor gear box housing (4). Said stationary brake actuator (8, 24) actuates a braking force transmission element (17, 23) that is functionally coupled to the at least one braking force absorption element (2) so as to exert a braking effect. At least one rotor brake deactivation device (6, 9, 25) is provided. The at least one braking force absorption element comprises lamellas (2) interacting with stationary lamellas (3), said lamellas (2) and stationary lamellas (3) being arranged inside of the rotor gear box housing (4) with oil inside.

主权项

1. A rotor brake device for a helicopter having a main rotor, a gear box for rotatably driving a rotatable shaft of the main rotor, the gear box having a gear box housing with oil inside, the rotor brake device comprising:
at least one braking force absorption element mounted to said rotatable shaft; a stationary brake actuator mounted to said gear box housing, a braking force transmission element, said stationary brake actuator actuating said braking force transmission element that is functionally coupled to the at least one braking force absorption element, so as to exert a braking effect; and at least one rotor brake deactivation device, wherein the at least one braking force absorption element comprises stationary lamellas and rotary lamellas interacting with the stationary lamellas, said rotary lamellas and stationary lamellas being arranged inside of the gear box housing with oil inside, wherein the rotor brake deactivation device is dependent on a pressure p of oil inside the gear box housing, the pressure being controlled by the rotor speed of the main rotor wherein the brake deactivation device has a control piston in a control casing forming a control piston chamber, the control piston chamber connected to an oil supply line providing oil pressure; and wherein the control casing of the brake deactivation device forms an oil pressure line having a non-return valve and a non-return spring, wherein the oil pressure line is controlled by a position of the control piston and the non-return valve.