Now the helicopter uses a turboshaft engine, how to drive the helicopter propeller?

Now the helicopter uses a turboshaft engine, how to drive the propeller? Very demanding

Because of its own particularity, a helicopter can't directly blow something back to make it fly forward like a traditional model, and its whole power transmission is obviously different from other models.

The rotor of a helicopter rotates upward, but its power device is generally installed horizontally, so it is not directly carried out, but is converted through a set of devices to turn the original longitudinal output power to the lateral direction for the rotor to use. This part of the rotor is mainly used to provide upward force for the whole machine to replace the wing in the traditional model. At the same time, because a component is needed to suppress the reverse rotation during the rotation process, the power should not only be provided to the rotor, but also be output backward. This makes the transmission of the helicopter itself very complicated, and the design of the whole device is still quite difficult.

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Moreover, it should be clear that the power of the whole machine is not directly output by the engine. If it is direct output, it will be difficult to control and the speed will be too fast. So the power output by the engine will be slowed down and then sent to all the parts that need power. For the traditional turboshaft power, not only one-stage deceleration can be used, but also multi-stage deceleration can be used to meet the final use requirements. At the same time, it is often difficult to change direction. The whole system must provide a constant output during operation.

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To sum up, the transmission of helicopter is a very complicated problem, which makes the working environment of each component comparable to hell compared with conventional models. Therefore, the stability and safety of the whole transmission device are very demanding, and each gear is required to be very stable without error. With the improvement of helicopter performance requirements in the future, the development requirements of the whole power transmission device will be higher.