Split Aerostatic Bearing for Precise Rotor Static Balancing
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Solution Overview
Problem
Existing rotor static balance devices face issues with large frictional resistance, ball abrasion, and low measurement accuracy due to the use of rolling bearings, and most aerostatic bearings are integrally manufactured, making them unsuitable for rotor static balancing, which results in devices with high volume, weight, poor portability, and low balance precision.
Innovation Solution
The development of split-type swing angle adjustable aerostatic bearing devices that include a shaft base with a semi-cylindrical surface and air holes for air support, allowing the rotor to be statically balanced with minimal friction, and an air flotation support device for rotating ring-shaped parts, enabling precise balance through gas molds formed by air pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rolling bearings are used for rotor static balance support, then the rotor can be positioned and supported, but frictional resistance increases and ball abrasion occurs leading to decreased measurement accuracy
Solution Approach 1:
The patent replaces rolling bearings with an aerostatic bearing that uses compressed air to create a floating support for the rotor. Air holes in the bearing base generate an air cushion that eliminates direct contact between the rotor and support surface, thereby eliminating frictional resistance and ball abrasion while maintaining positioning accuracy
Solution Approach 2:
The patent substitutes the mechanical rolling bearing system with a pneumatic aerostatic bearing system. This replacement transitions from mechanical contact-based support to air-cushion-based support, resolving the friction and wear problems inherent in mechanical bearings
2Reliability
If integrally manufactured aerostatic bearings are used, then friction loss is reduced and movement precision is improved, but the device volume and weight increase reducing portability
Solution Approach 1:
The aerostatic bearing is divided into two separate halves that can be assembled around the rotor shaft. This segmented design allows the bearing to be constructed in place without requiring a large integral structure, thereby reducing overall device volume and weight while maintaining the precision benefits of aerostatic support
Solution Approach 2:
The two halves of the aerostatic bearing are designed to fit together around the rotor shaft in a nested configuration. This allows compact assembly that minimizes device footprint and weight while preserving the full functionality of the aerostatic bearing
3Reliability
If the rotor is disposed in a floating form during static balancing, then aerostatic bearings can be used, but the rotor tilts causing collision and friction on the bearings
Solution Approach 1:
The aerostatic bearing base is designed to be swingable rather than fixed, allowing it to dynamically adjust its position and angle in response to rotor tilt. This dynamic adjustment prevents collision between the rotor and bearing structure while maintaining the aerostatic floating support
Solution Approach 2:
The swingable bearing base can periodically adjust its position during the static balancing process to accommodate rotor movements and tilts, preventing sustained contact and friction while maintaining support
4Reliability
If guide rail type or swing frame type devices are used for rotor static balance, then the rotor can be balanced, but the devices have large volume weight and poor portability
Solution Approach 1:
The aerostatic bearing is segmented into two halves that can be assembled in place, eliminating the need for large integral guide rail or swing frame structures. This segmentation dramatically reduces device volume and weight while maintaining static balance capability
Solution Approach 2:
The use of lightweight aerostatic bearing components replaces heavy guide rails and swing frames, achieving static balance functionality with a much lighter and more portable device configuration
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 solution provides high-precision, portable, and lightweight rotor static balance with reduced friction, preventing wear and improving measurement accuracy, while allowing for the static balancing of rotating ring-shaped parts with a simple and efficient air flotation mechanism.
Implementation Method 1
Aerostatic lubricating bearings have a series of advantages such as small friction loss, high movement precision, small vibration, no pollution
Implementation Method 2
an air flotation support device for rotating ring-shaped parts, enabling precise balance through gas molds formed by air pressure
Data Source
AI summary
The present disclosure provides a split-type swing angle adjustable aerostatic bearing device for rotor static balance and an air flotation support device for static balance of rotating ring-shaped parts, the split-type swing angle adjustable aerostatic bearing device for rotor static balance and an air flotation support device for static balance of rotating ring-shaped parts belong to a field of static balance detection, and aims to solve a problem of low measurement precision of rotor and realize static balance of rotating ring-shaped parts. A gas mold, having a certain bearing capacity, is formed between an outer surface of the air flotation support cover under the bearing base and a concave surface of the upper base, so that the bearing base is floated to realize an automatic centering of the rotor static balancing device.