Motor Supporting Frame Assembly for High-Speed Coaxiality
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The accumulated tolerance in the assembly of multiple components in rotating motors leads to decreased working performance and reliability, particularly at high speeds, due to inadequate coaxiality and air gap precision.
Innovation Solution
A rotating motor design featuring a supporting frame with bearing seats and support rods, where the rotor is assembled with bearings and a permanent magnet, allowing for direct mounting and calibration to ensure coaxiality and dynamic balance, reducing assembly tolerance and improving high-speed stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple components are assembled to form the rotating motor, then the device functionality is improved, but the accumulated tolerance increases and assembly accuracy deteriorates
Solution Approach 1:
The patent integrates the bearing seats directly into the stator structure, merging what were previously separate components (stator and bearing seats) into a single integrated stator assembly. This eliminates the interface between the stator and bearing seats, removing a source of accumulated tolerance. The rotor components (rotating shaft, permanent magnet, and bearings) are assembled as a complete rotor assembly before being mounted to the stator, reducing the number of assembly interfaces and minimizing tolerance accumulation across the entire motor structure.
2Speed
If the rotating speed is increased to tens of thousands or hundreds of thousands of revolutions per minute, then the motor performance is improved, but the requirements for coaxiality and assembly accuracy become more stringent
Solution Approach 1:
The patent employs preliminary action by pre-assembling the complete rotor assembly (including rotating shaft, permanent magnet, and bearings) before mounting it to the stator. This allows for preliminary balancing and coaxiality verification of the rotor components before final assembly. Additionally, the bearing seats are pre-integrated into the stator structure with precise coaxiality features, ensuring that the high-speed rotation requirements are met before the motor enters operation.
3Use of energy by moving object
If the air gap between stator and rotor is reduced to improve efficiency, then the motor efficiency is improved, but the assembly accuracy requirements between components increase
Solution Approach 1:
By integrating the bearing seats into the stator structure, the patent reduces the number of separate components and interfaces. This integration minimizes the cumulative tolerance buildup that would otherwise occur at each interface, enabling tighter air gaps between the stator and rotor while maintaining acceptable assembly accuracy. The reduced number of interfaces directly supports the achievement of smaller air gaps for improved efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances the assembly accuracy and reliability of rotating motors, ensuring stable and high-speed operation with reduced vibration and noise, thereby improving the overall performance and reliability of the motor and associated devices like fans.
Implementation Method 1
the rotor comprises a rotating shaft, a permanent magnet mounted on the rotating shaft... the stator comprises a stator yoke sleeved on the supporting frame, a plurality of stator teeth arranged on the stator yoke, and coils respectively wound on the stator teeth
Data Source
AI summary
A rotating motor and a fan are provided. A first bearing seat, a second bearing seat and a plurality of support rods of the motor are arranged to form a supporting frame of the motor. Accordingly, the coaxiality between the first bearing seat and the second bearing seat can be ensured. The motor has a rotor. The outer diameter of the permanent magnet of the rotor is disposed to be greater than or equal to the outer diameter of a second bearing of the rotor. The outer diameter of a first bearing of the rotor is disposed to be greater than or equal to the outer diameter of the permanent magnet of the rotor. Accordingly, the entire rotor of the rotating motor can be directly mounted on the supporting frame.