Fan blade supporting structure, air conditioner outdoor unit and air conditioner

Abstract

The invention provides a fan blade supporting structure, an air conditioner outdoor unit and an air conditioner, the fan blade supporting structure comprises fan blades, the fan blades are sleeved ona power output shaft of a driving motor, the fan blade supporting structure further comprises a motor support and a shaft end supporting piece, the driving motor is connected onto the motor support, and the shaft end supporting piece is connected onto the shaft end supporting piece. The shaft end supporting piece is connected to the free end of the power output shaft. According to the invention, the double-end support of the power output shaft of the driving motor is realized, the stress of the power output shaft is optimized, the motor efficiency, the service life and the stability and the reliability of a structural member can be improved, and the shaking and the abnormal noise of fan blades and a shell are effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to a fan blade support structure, an outdoor unit of an air conditioner, and an air conditioner. Background technique [0002] Existing air conditioner outdoor units, especially side air outlet units, mostly use axial flow fans for their motors. The axial flow fan blades are generally fixed on the motor shaft, and the motor shaft bears the gravity of the fan blades. This force will cause the motor shaft to be damaged. The pressure and friction force increase, which reduces the efficiency of the motor; while the axial flow fan blade generally has a 3-blade structure, there is a certain deviation from the design to the manufacturing process, and the motor bracket and the motor shaft will be deformed after assembly. Even if the fan blade is dynamically balanced It is also difficult to achieve complete balance. When the motor shaft is deformed or the assembly is sli...

AI Technical Summary

Problems solved by technology

[0002] Existing air conditioner outdoor units, especially side air outlet units, mostly use axial flow fans for their motors. The axial flow fan blades are generally fixed on the motor shaft, and the motor shaft bears the gravity of the fan blades. This force will cause the motor shaft to be damaged. The pressure and friction force increase, which reduces the efficiency of the motor; while the axial flow fan blade generally has a 3-blade structure, there is a certain deviation from the design to the manufacturing process, and the motor bracket and the motor shaft will be deformed after assembly. Even if the fan blade is dynamically balanced It is also difficult to achieve complete balance. When the motor shaft is deformed or the assembly is slightly misaligned, the center of gravity of the fan blade may change slightly periodically during rotation, which will cause slight vibration and jitter. After a long time of operation, As the deviation increases, the jitter also increases, and there are hidden dangers such as abnormal noise, interference and collision

Furthermore, due to processing deviation or dynamic balance deviation or deformation of the motor bracket after assembly, the center of gravity of the fan blade may shift, resulting in vibration during the rotation of the fan blade

[0003] The existing fan blade fixing method is a cantilever beam structure fixed on one side, and the greater the mass of the air conditioner fan blade, the greater the deformation of the structural parts, and the greater the amplitude of its vibration. Long-term operation may cause the screws to loosen and produce abnormal noise. , shell vibration, etc., and the greater the mass of the air conditioner fan blade, the greater the force that the motor shaft needs to provide, resulting in increased force on the motor shaft, increased friction, and reduced motor efficiency, which is not good for energy consumption, noise, and reliability.

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