Noncontact Fluid Bearing Sealing Layer Precision Machining
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hydrostatic bearings face challenges in maintaining even exhaust distributions due to uneven surface restrictor layers, leading to potential pneumatic hammer issues during mass production, and difficulty in controlling the thickness of the gel penetrating into the base member.
Innovation Solution
A noncontact fluid bearing design featuring a carrier with a cavity and a flow controller, including a porous layer and a sealing layer with micro through holes, where the sealing layer is pushed by fluid pressure to stay stable and the porous layer's thickness and flatness are adjustable through grinding, preventing peeling and ensuring even exhaust.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the surface restrictor layer is formed by baking gel on the base member, then the sealing function is improved, but the thickness uniformity deteriorates causing uneven exhaust distribution
Solution Approach 1:
The sealing layer is separated from the porous layer as an independent component that can be precisely manufactured and controlled. This extraction allows the sealing layer to be produced with high thickness uniformity (within ±0.05mm) through precision machining, eliminating the thickness variation problems associated with gel baking methods while maintaining effective sealing through the microporous structure.
2Measurement precision
If air is supplied during grinding of the surface restrictor layer, then the flow rate measurement is improved, but the surface uniformity deteriorates due to peeling
Solution Approach 1:
A adhesive layer is introduced as an intermediary between the sealing layer and the porous layer to prevent peeling during grinding. This adhesive mediator maintains the stability and uniformity of the sealing layer surface while allowing air supply for flow rate measurement, thus resolving the contradiction between measurement capability and surface integrity.
3Ease of manufacture
If the gel penetration depth is not controlled, then the manufacturing simplicity is improved, but the exhaust distribution uniformity deteriorates
Solution Approach 1:
The gel baking process is replaced with a precision machining process for creating the sealing layer. Instead of relying on uncontrolled gel penetration, a cutting tool with a precisely controlled depth of cut is used to machine the sealing layer to the exact required thickness. This mechanical substitution ensures uniform exhaust distribution while maintaining manufacturing efficiency through automated precision machining.
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 allows for precise control of fluid flow and exhaust volume, preventing pneumatic hammer and ensuring consistent performance by adjusting the thickness and flatness of the noncontact fluid bearing, thereby addressing the issues of uneven exhaust distributions and peeling of the sealing layer.
Implementation Method 1
The sealing layer located between the pressure chamber and the porous layer can be pushed by a force of a fluid to stay on the first surface of the porous layer stably
Implementation Method 2
The sealing layer has a plurality of micro through holes communicating with the pressure chamber and a plurality of pores of the porous layer
Data Source
AI summary
A noncontact fluid bearing is manufactured by disposing a flow controller in a cavity of a carrier to form a pressure chamber within the cavity. A sealing layer of the flow controller is located between a porous layer of the flow controller and the pressure chamber and has micro through holes communicating with the pressure chamber and pores of the porous layer. Because the sealing layer is located in the pressure chamber and a surface of the porous layer is exposed by a housing of the carrier, the noncontact fluid bearing can be processed from the exposed surface of the porous layer to conform standards of thickness and flatness. Furthermore, the sealing layer peeling from the noncontact fluid bearing is prevented.