Vibration reduction device suitable for aero-engine reduction box

Abstract

The invention discloses a vibration reduction device suitable for an aero-engine reduction box. The vibration reduction device comprises an output shaft used for being connected with the reduction box, a power transmission mechanism used for transmitting the torque from an aero-engine to the output shaft, a spring seat arranged on the output shaft in a sleeving mode and a spring assembly which is arranged between the spring seat and the power transmission mechanism and used for applying an axial elastic acting force to the power transmission mechanism. According to the vibration reduction device suitable for the aero-engine reduction box, the spring assembly is arranged to absorb the torsional vibration energy of the engine, a buffering effect is achieved between the engine and the reduction box, then the vibration reduction effect is achieved, through shaft teeth in the reduction box, a gear is prevented from being damaged, and the reliability and comfort of an aero-power assembly are improved.

Description

technical field [0001] The invention belongs to the technical field of engine reduction box power, in particular, the invention relates to a vibration damping device suitable for an aircraft engine reduction box. Background technique [0002] At present, in the field of piston aeroengines, some engines with simple structures, directly driving propellers, and small power-to-weight ratios cannot meet the purposes of aircraft. Aircraft now require high power-heavy and low fuel consumption for the powertrain. If the engine direct-drive propeller is used, the power-to-weight ratio of the engine will be small. Therefore, the commonly used solution is to increase the power of the engine by high-speed and high-pressure. The speed required by the actual aircraft will be lower than the speed of a single engine, so in general, it is necessary to add a deceleration mechanism separately to reduce the output speed of the powertrain, so as to achieve a perfect match between the engine and ...

AI Technical Summary

Problems solved by technology

The engine is directly connected to the gearbox, and the torsional vibration of the engine is completely transmitted to the gearbox through the output end. This torsional vibration produces a huge alternating impact load, which is transmitted to the gears, shafts and other parts in the gearbox. , will greatly reduce the reliability of the gearbox, which may cause the vibration and noise of the gearbox to be very loud, or lead to broken teeth and shafts of the gearbox, damage to the powertrain, and even the tragedy of crashing the plane.

[0003] Generally, hard connections cannot be used between the engine and the gearbox. Referring to the current vehicle structure, the engine is equipped with a single-mass flywheel, which is connected to the gearbox through a diaphragm spring clutch and a clutch pressure plate. With this structure, the powertrain A 10kg increase in weight will greatly reduce the power-to-weight ratio of the powertrain

[0004] Generally, the powertrain for aviation use, the connection between the engine and the gearbox is also made of rubber damping material, which is generally used in the powertrain below 30KW, and for the powertrain above 80KW, rubber sleeves are used to reduce vibration. Vibration will reduce the vibration damping effect, the weight will increase significantly, and the reliability will decrease

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