Fan rotor and air cycle machine

Abstract

The invention provides a fan rotor and an air cycle machine, the fan rotor comprises a hub and blades, the hub is of a cylindrical structure, each blade comprises a blade root and a blade tip, the blade roots are connected with the peripheral surface of the hub to form a blade root section Sh, the blade tips are the end surfaces of the sides opposite to the blade roots, and the end surfaces of the blade tips are arc-shaped blade tip sections Sc; and the included angle between the tangential direction of a mean camber line at the front edge of the blade root and the tangential direction of a mean camber line at the tail edge of the blade root is a blade root bent angle, the blade tip comprises a blade tip front edge and a blade tip tail edge, and the blade tip front edge is located on the upstream side of the blade tip tail edge in the airflow flowing direction. The included angle between the tangential direction of the mean camber line at the front edge of the blade tip and the tangential direction of the mean camber line at the tail edge of the blade tip is a blade tip bent angle, and a blade root bent angle is larger than the blade tip bent angle. According to the invention, the pressure ratio of the transonic fan blade is reduced, the fan consumption power is reduced, and the compressor pressurization and aircraft air-conditioning refrigeration capabilities are improved.

Description

technical field [0001] The invention relates to the technical field of air cycle machines, in particular to a fan rotor and an air cycle machine. Background technique [0002] The air cycle machine is the core component of the aircraft air conditioning and refrigeration unit. The rotor system of a typical three-wheel booster air cycle machine is a coaxial mechanism composed of a turbine-compressor-fan three impellers. The operation of the fan and the compressor is powered by the output power of the turbine, and the main function of the fan is to provide the cold side flow for the primary and secondary heat dissipation of the high-temperature bleed air of the engine. [0003] The air flow of the fan comes from the ram air duct on the surface of the engine room, and is directly discharged out of the cabin after heat exchange. Therefore, the flow channel of the entire fan is short and the resistance is small, so the pressure ratio requirement for the fan is also small. However...

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the high power consumption of the fan of the air cycle machine in the prior art, which leads to the poor pressurization effect of the compressor and the low cooling capacity of the aircraft air conditioner, thereby providing a fan rotor and air cycler

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