Motor-Integrated Fluid Machine Ring Restraint for Centrifugal Loads
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Solution Overview
Problem
The existing motor-integrated fluid machines face challenges in achieving sufficient load capacity due to the high centrifugal forces applied to rotor-side magnets, which are difficult to securely integrate with adhesives or locking parts, especially at high speeds.
Innovation Solution
A motor-integrated fluid machine design featuring a rotating support ring with blades and an outer peripheral drive motor, where a restraining part covers and integrates the rotating support ring and rotor-side magnet, using a composite material or metal casing to enhance load capacity and withstand centrifugal forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rotor side magnet is bonded with an adhesive agent or integrated with a locking part, then the magnet can be fixed to the rotor, but the load capacity at the joining part becomes insufficient under high centrifugal force
Solution Approach 1:
The restraining part integrates the rotating support ring and rotor side magnet into a unified structure, merging previously separate components to distribute and share the centrifugal force loads, thereby achieving sufficient load capacity without relying solely on adhesive bonds or locking parts
Solution Approach 2:
The restraining part is constructed from composite materials that provide high strength-to-weight ratio, enabling the structure to withstand high centrifugal forces while maintaining adequate load capacity at the joining parts between the magnet and rotor
2Strength
If a thick restraining part is used to increase load capacity, then the structure can withstand centrifugal force, but gaps increase and motor performance decreases
Solution Approach 1:
The use of high-performance composite materials allows the restraining part to achieve the required load capacity and centrifugal force resistance with a reduced thickness, thereby minimizing gaps and maintaining optimal motor performance
Solution Approach 2:
The restraining part is optimized with specific geometric parameters and material properties that enable it to withstand centrifugal forces effectively at minimal thickness, balancing structural strength requirements with motor performance considerations
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
The design achieves a sufficient load capacity even under centrifugal forces, improving energy efficiency and reducing stress concentration, while allowing for a thinner restraining part to minimize gaps and enhance motor performance.
Implementation Method 1
a motor which includes a rotor side magnet provided on an outer peripheral side of the rotating support ring in a radial direction, and a stator side magnet provided on an inner peripheral side of the outer peripheral part to face the rotor side magnet
Implementation Method 2
A centrifugal force toward an outside in a radial direction is applied to the rotor in rotation
Data Source
AI summary
A motor-integrated fluid machine includes a rotatable part configured to rotate around a rotation axis; an outer peripheral part at an outer periphery of the rotatable part; a motor configured to provide power from the outer peripheral part to rotate the rotatable part; and a restrainer part. The rotatable part includes a support ring around the rotation axis, and blades on a center side of the support ring. The blades are side by side in a circumferential direction. The motor includes a rotor side magnet on an outer peripheral side of the support ring in a radial direction, and a stator side magnet on an inner peripheral side of the outer peripheral part to face the rotor side magnet. The restrainer part is configured to restrain the support ring and the rotor side magnet from outside to integrate the support ring and the rotor side magnet.