Hydrostatic Gas Bearing Humidity Removal via Heat Exchanging
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Solution Overview
Problem
Hydrostatic gas bearings face operational instability due to the formation of two-phase mixtures of gas and liquid during throttling expansion, which can lead to liquefaction and unreliable bearing performance.
Innovation Solution
A hydrostatic gas bearing configured to remove humidity by heat exchanging, featuring an annular throttling component with a porous structure and heat exchanging tubes that decrease the temperature and pressure of the working medium, vaporizing the liquid phase to prevent liquefaction and ensure reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-pressure gas is used as working medium for throttling expansion, then the bearing capacity and power system compatibility are improved, but the gas may liquefy during throttling to form two-phase mixture, deteriorating bearing reliability
Solution Approach 1:
The patent applies preliminary action by pre-heating the working medium before it enters the throttling component. Heat exchanging tubes are arranged within the throttling component to provide heating in advance, preventing liquefaction during throttling expansion and maintaining the working medium in gas phase throughout the bearing operation.
Solution Approach 2:
The patent uses heat exchanging tubes as an intermediary element within the throttling component. These tubes carry heating medium that transfers thermal energy to the working medium, acting as a mediator to prevent temperature drop and phase change during the throttling process, thereby resolving the contradiction between utilizing high-pressure gas benefits and avoiding liquefaction.
2Stress or pressure
If throttling expansion is applied to reduce pressure, then the working medium pressure is decreased, but temperature decreases simultaneously causing liquefaction
Solution Approach 1:
The patent merges the pressure reduction function and temperature maintenance function into a single integrated throttling component. The heat exchanging tubes are embedded within the throttling component structure, combining the throttling passage with heating capability, so that pressure reduction and temperature maintenance occur simultaneously in the same component.
Solution Approach 2:
The patent applies parameter changes by introducing a heating medium through the heat exchanging tubes to change the thermal parameter of the working medium during throttling. This external heating input compensates for the temperature drop caused by throttling expansion, allowing pressure reduction without corresponding temperature decrease that would cause liquefaction.
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 effectively prevents liquid from entering the bearing's operational gaps, thereby enhancing the reliability and stability of the hydrostatic gas bearing by maintaining the working medium in a gas phase.
Implementation Method 1
The heat exchanging tube is provided with a heat exchanging medium flowing therein, which is configured to heat and vaporize a part of an in-liquid phase in a cooled portion of the working medium
Implementation Method 2
heat and vaporize a part of an in-liquid phase in a cooled portion of the working medium
Implementation Method 3
gas pressure and temperature decrease during throttling in the hydrostatic gas bearing
Data Source
AI summary
A hydrostatic gas bearing is provided that is configured to remove humidity by heat exchanging, including a bearing seat, a rotary shaft, an annular throttling component, and a plurality of heat exchanging tubes. A cavity is provided inside the bearing seat and an inlet pipe is provided on an outer surface of the bearing seat. The annular throttling component is sleeved on the outside of the rotary shaft with a first gap provided between the annular throttling component and the rotary shaft. The first gap goes through the bearing seat to form an exhaust channel therein, and the annular throttling component is configured to throttle and cool a working medium. The plurality of heat exchanging tubes are provided in the annular throttling component, with heat exchanging medium flowing therein, which is configured to heat and vaporize a part of an in-liquid phase in a cooled portion of the working medium.