Rotary Fluid Machine Thrust Bearing Layout for Axial Stability
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Solution Overview
Problem
Existing rotary fluid machines face challenges in efficiently supporting the rotary shaft in the axial direction due to thrust forces, leading to instability and increased power consumption by thrust magnetic bearings.
Innovation Solution
The rotary fluid machine incorporates a thrust magnetic bearing that partitions the casing into two spaces, utilizing differential pressure and magnetic levitation to support the rotary shaft in the axial direction, reducing the pulling force required from the thrust magnetic bearing and minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a thrust magnetic bearing is used to support the rotary shaft in the axial direction, then the rotary shaft stability is improved, but the power consumption increases
Solution Approach 1:
The thrust magnetic bearing is divided into a first thrust magnetic bearing and a second thrust magnetic bearing positioned at different locations along the rotary shaft. This segmentation allows the thrust forces to be distributed across multiple bearing points, reducing the load on each individual bearing and thereby lowering the overall power consumption while maintaining shaft stability
Solution Approach 2:
A partition member is introduced as an intermediary component between the first and second thrust magnetic bearings. This partition member helps to distribute and balance the axial thrust forces, enabling each magnetic bearing to operate more efficiently with reduced power consumption while collectively providing stable support for the rotary shaft
2Device complexity
If a single thrust magnetic bearing supports the rotary shaft, then the structure is simple, but the bearing size and power consumption increase
Solution Approach 1:
The single thrust magnetic bearing is segmented into multiple smaller thrust magnetic bearings (first and second thrust magnetic bearings). This segmentation reduces the size and power consumption of each individual bearing while collectively providing the same level of support, thus resolving the contradiction between structural simplicity and energy efficiency
3Force
If the thrust magnetic bearing pulls the rotary shaft with large force, then the axial support is strong, but the power consumption increases
Solution Approach 1:
The total axial support force is segmented and distributed across multiple thrust magnetic bearings. Each bearing generates a smaller pulling force on the rotary shaft, but the cumulative effect of multiple bearings provides strong overall axial support while significantly reducing the power consumption compared to a single high-force bearing
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 configuration stabilizes the rotary shaft's axial support, reduces the size and power consumption of the thrust magnetic bearing, and maintains differential pressure effectively, enhancing the machine's efficiency and stability.
Implementation Method 1
a thrust magnetic bearing configured to support the rotary shaft in an axial direction
Implementation Method 2
utilizing differential pressure and magnetic levitation to support the rotary shaft in the axial direction, reducing the pulling force required from the thrust magnetic bearing
Data Source
AI summary
A rotary fluid machine includes a casing, a partition member that partitions a space in the casing into a first space and a second space, and a rotary shaft provided in the casing. The rotary shaft is rotatably supported. The partition member includes a thrust magnetic bearing that supports the rotary shaft in an axial direction.