US-12624731-B2 - Hydrostatic gas bearing configured to remove humidity by heat exchanging

US12624731B2US 12624731 B2US12624731 B2US 12624731B2US-12624731-B2

Abstract

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.

Inventors

Zhiwu Ke
Guangming CAO
Jinlan GOU
Yuansheng Lin
Zhenxing Zhao
Hanbing Ke
Can Ma
Wei Wang
Bangming Li
LU DAI
Tao He

Assignees

WUHAN SECOND SHIP DESIGN AND RESEARCH INSTITUTE

Dates

Publication Date: 20260512
Application Date: 20241025
Priority Date: 20231214

Claims (10)

1 . A hydrostatic gas bearing configured to remove humidity by heat exchanging, comprising: a bearing seat, with a cavity provided inside the bearing seat, and with an inlet pipe that is provided on an outer surface of the bearing seat and communicates with the cavity; a rotary shaft, passing through the bearing seat; an annular throttling component that is sleeved outside of the rotary shaft and is provided inside the cavity, wherein a first gap is provided between the annular throttling component and the rotary shaft, and wherein the first gap passes through the bearing seat to form an exhaust channel, wherein the annular throttling component is configured to throttle and cool a working medium; and a plurality of heat exchanging tubes provided in the annular throttling component, the plurality of heat exchanging tubes being arranged circularly along a circumference of the annular throttling component, and the plurality of heat exchanging tubes being provided with a heat exchanging medium flowing therein, wherein the heat exchanging medium is configured to heat and vaporize a part of an in-liquid phase in a cooled portion of the working medium.
2 . The hydrostatic gas bearing configured to remove humidity by heat exchanging according to claim 1 , wherein the annular throttling component is made of a material having a porous structure.
3 . The hydrostatic gas bearing configured to remove humidity by heat exchanging according to claim 1 , wherein the annular throttling component is provided with a plurality of first via holes on walls thereof, the plurality of first via holes being configured to perform throttling and cooling on the working medium.
4 . The hydrostatic gas bearing configured to remove humidity by heat exchanging according to claim 1 , wherein the annular throttling component is a non-metallic annular throttling component.
5 . The hydrostatic gas bearing configured to remove humidity by heat exchanging according to claim 1 , wherein the plurality of heat exchanging tubes are arranged circularly along a circumference of the annular throttling component to form a plurality of heat exchanging layers, the heat exchanging layers being provided with a gap between adjacent layers.
6 . The hydrostatic gas bearing configured to remove humidity by heat exchanging according to claim 5 , wherein a temperature of the heat exchanging medium in a first heat exchanging layer of the plurality of heat exchanging layers adjacent to the first gap is higher than a temperature of the heat exchanging medium in other heat exchanging layers of the plurality of heat exchanging layers.
7 . The hydrostatic gas bearing configured to remove humidity by heat exchanging according to claim 5 , further comprising: a first pipeline communicating with first ends of the heat exchanging layers, the first pipeline being configured to inject the heat exchanging medium; a second pipeline communicating with second ends of the heat exchanging layers, the second pipeline being configured to discharge the heat exchanging medium.
8 . The hydrostatic gas bearing configured to remove humidity by heat exchanging according to claim 7 , wherein the bearing seat comprises an annular member and a pair of end caps, the pair of end caps being respectively provided at ends of the annular member, each of the end caps being provided with a second via hole through which the rotary shaft is disposed, a diameter of the second via hole being larger than a diameter of the rotary shaft such that an exhaust channel is provided therein; and wherein the first and second pipelines go through the end caps and extend beyond the end caps.
9 . The hydrostatic gas bearing configured to remove humidity by heat exchanging according to claim 8 , further comprising: a pair of sealing plates respectively provided at ends of the annular throttling component, wherein both ends of the heat exchanging tubes go through the sealing plates respectively and communicate with the first pipeline or the second pipeline, each sealing plate of the pair of sealing plates being provided with a third via hole, and wherein a diameter of the third via hole is equal to the diameter of the second via hole.
10 . The hydrostatic gas bearing configured to remove humidity by heat exchanging according to claim 1 , wherein a second gap is formed between the annular throttling component and an inner wall of the bearing seat, wherein the second gap forms an inlet channel which communicates with the inlet pipe.

Description

CROSS-REFERENCE TO RELATED DISCLOSURES This disclosure claims priority to Chinese Patent Application No. 2023117251415, filed on Dec. 14, 2023, entitled “Hydrostatic Gas Bearing Configured to Remove Humidity by Heat Exchanging”, which is hereby incorporated by reference in its entirety. TECHNICAL FIELD The present disclosure relates to the field of bearing, specifically to a hydrostatic gas bearing configured to remove humidity by heat exchanging. BACKGROUND Bearings are one of the key components of power machinery. Hydrostatic gas bearings have a strong capacity in bearing loads and may use high-pressure gas internally from a power system as the working medium of bearing. The working medium is more compatible with the system, and compared to traditional oil-lubricated bearings, the need for an oil supply system may be eliminated, losses due to friction in bearing may be reduced, and the power system may be simplified with energy efficiency improved. In some power systems, such as a steam system of nuclear power plants, steam may liquefy to form water droplets during throttling expansion. When such working media are used as the gas supply for hydrostatic gas bearings, gas pressure and temperature decrease during throttling in the hydrostatic gas bearing and thus the gas may be liquefied, so that a two-phase mixture of gas and liquid may enter bearing clearance, and it is difficult for the bearing to operate reliably. BRIEF SUMMARY The present disclosure provides a hydrostatic gas bearing configured to remove humidity by heat exchanging to address problems in the prior art where two-phase mixtures of gas and liquid liquefy to form water droplets during throttling expansion, so that it is difficult for the bearing to operate reliably. The present disclosure provides a hydrostatic gas bearing configured to remove humidity by heat exchanging, including: a bearing seat, a cavity is provided inside the bearing seat and an inlet pipe is provided on an outer surface of the bearing seat and communicates with the cavity; a rotary shaft, passing through the bearing seat; an annular throttling component, sleeved on the outside of the rotary shaft and provided inside the cavity, with a first gap provided between the annular throttling component and the rotary shaft, the first gap passing through the bearing seat to form an exhaust channel. The annular throttling component is configured to throttle and cool a medium. A plurality of heat exchanging tubes, provided in the annular throttling component, arranged circularly along circumference of the annular throttling component. 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. According to the hydrostatic gas bearing configured to remove humidity by heat exchanging provided in this disclosure, the annular throttling component is made of a material with a porous structure. In the hydrostatic gas bearing configured to remove humidity by heat exchanging provided in this disclosure, the annular throttling component is made of a material with a porous structure. In the hydrostatic gas bearing configured to remove humidity by heat exchanging provided in this disclosure, the annular throttling component is provided with a plurality of first via holes on walls, the plurality of first via holes are configured to perform throttling and cooling on the medium. In the hydrostatic gas bearing configured to remove humidity by heat exchanging provided in this disclosure, the annular throttling component is a non-metallic annular throttling component. In the hydrostatic gas bearing configured to remove humidity by heat exchanging provided in this disclosure, a plurality of heat exchanging tubes are arranged circularly along circumference of the annular throttling component, to form heat exchanging layers. The heat exchanging layers are multiple layers, with a gap between adjacent layers. In the hydrostatic gas bearing configured to remove humidity by heat exchanging provided in this disclosure, a temperature of heat exchanging medium in a heat exchanging layer adjacent to the first gap is higher than a temperature of heat exchanging medium in other heat exchanging layers. The hydrostatic gas bearing configured to remove humidity by heat exchanging provided in this disclosure further includes: a first pipeline communicating with first ends of the heat exchanging layers, and configured to inject the heat exchanging medium; a second pipeline communicating with second ends of the heat exchanging layers, and configured to discharge the heat exchanging medium. In the hydrostatic gas bearing configured to remove humidity by heat exchanging provided in this disclosure, the bearing seat includes an annular member and a pair of end caps. The pair of end caps are respectively provided at both ends of the annular member. Each of the end caps is provided with