IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0268002
(2016-09-16)
|
등록번호 |
US-9784312
(2017-10-10)
|
우선권정보 |
CN-2016 2 0448968 U (2016-05-16) |
발명자
/ 주소 |
- Gu, Fahua
- Yuan, Peng
- Song, Jiejie
- Ji, Weixing
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
1 |
초록
▼
A method for increasing load capacity on a porous aerostatic bearing through use of a two-phase fluid that is less viscous than lubrication oils and the bearing gap is of the size of air bearings. The porous material throttles vapor and liquid. As liquid goes through the porous media, the pressure d
A method for increasing load capacity on a porous aerostatic bearing through use of a two-phase fluid that is less viscous than lubrication oils and the bearing gap is of the size of air bearings. The porous material throttles vapor and liquid. As liquid goes through the porous media, the pressure drop from the porous media resistance causes it to vaporize. The increased volume flow in the bearing gap reduces the vapor flow rate through porous media, resulting in higher pressure in gap. As the vapor-liquid mixture escapes from bearing gap, another vaporization occurs at the end of bearings which retards escaping, and further increases pressure in the gap. The liquid portion of the two-phase fluid in the bearing gap increases the load capacity and stiffness, similar to hydrostatic bearings fed with liquid. The vaporization absorbs heat generated by bearing friction to allow higher relative speed between bearing surfaces.
대표청구항
▼
1. A method for increasing load-bearing capacity of an aerostatic bearing through use of a two-phase fluid, the method comprising: providing an aerostatic bearing, the aerostatic bearing comprising a housing having a radial hole, the aerostatic bearing further comprising a gap through which a load p
1. A method for increasing load-bearing capacity of an aerostatic bearing through use of a two-phase fluid, the method comprising: providing an aerostatic bearing, the aerostatic bearing comprising a housing having a radial hole, the aerostatic bearing further comprising a gap through which a load passes, the aerostatic bearing further comprising a bushing disposed in the gap, the bushing having a generally porous composition;heating a two-phase fluid, the two-phase fluid comprising a vapor and a liquid;forcing the two-phase fluid through the radial hole of the housing;enabling the two-phase fluid to flow through the bushing;throttling, whereby the resistance of the porous media reduces the pressure of the two-phase fluid, whereby the throttling vaporizes at least a portion of the liquid of the two-phase fluid, whereby the vaporization reduces the temperature of the aerostatic bearing;passing the remaining liquid and the vapor of the two-phase fluid between the bushing and the load, whereby a low friction load-bearing interface is formed between the bushing and the load; andthe vapor-liquid two-phase fluid escaping from the bearing gap at both ends, where the pressure drops to the level of the condenser which triggers another round of liquid vaporization. 2. The method of claim 1, further comprising a step of discharging the two-phase fluid from the housing of the aerostatic bearing. 3. The method of claim 2, further comprising a step of collecting the two-phase fluid in a condenser, whereby the vapor of the two-phase fluid is condensed substantially into the liquid. 4. The method of claim 3, further comprising a step of heating the two-phase fluid in a heating tank to maintain the required saturation pressure to allow the pump to work intermittently. 5. The method of claim 4, wherein the step of heating the two-phase fluid in a heating tank is configured to raise the liquid temperature such that a saturated vapor of corresponding high pressure is obtained. 6. The method of claim 5, wherein the high temperature, high pressure saturated vapor is at least partially condensed in the housing of the aerostatic bearing. 7. The method of claim 6, further comprising a step of pumping the two-phase fluid from the condenser to the heating tank through a pipe to raise the fluid pressure such that it can meet the pressure requirement of the bearings. 8. The method of claim 7, wherein the step of pumping the two-phase fluid from the condenser to the heating tank through a pipe, is operable with a pump. 9. The method of claim 8, wherein the two-phase fluid is selected from the group consisting of refrigerant, methanol, ethanol, ether, propane, gasoline, kerosene and water. 10. The method of claim 8, wherein the aerostatic bearing comprises a radial housing having an inner wall and an outer wall, the inner wall defined by a plurality of grooves configured to carry the two-phase solution. 11. The method of claim 10, wherein the heating tank comprises an outlet port, the outlet port configured to join with the plurality of grooves of the aerostatic bearing. 12. The method of claim 11, wherein the high temperature and high pressure saturated vapor produced in the heating tank is at least partially condensed in the plurality of grooves. 13. The method of claim 12, wherein the aerostatic bearing comprises a thrust aerostatic bearing. 14. The method of claim 13, wherein the thrust aerostatic bearing, comprises a cylindrical seat and a porous metal ring having a plurality of radial holes disposed in an even, spaced-apart relationship. 15. The method of claim 14, wherein the two-phase fluid includes at least one member selected from the group consisting of: a refrigerant, methanol, ethanol, ether, propane, gasoline, kerosene, and water. 16. A method for increasing load-bearing capacity of an aerostatic bearing through use of a two-phase fluid, the method comprising: using a vapor and liquid two-phase low-viscosity fluid as a lubricating medium;heating the lubrication medium to form a high temperature and pressure saturated vapor by a heating tank;connecting a vapor outlet port of the heating tank to a gas-liquid groove of the aerostatic bearing, wherein the high temperature and pressure saturated vapor is liquefied in the gas-liquid groove;discharging a vapor lubricating medium and a liquid lubricating medium from the aerostatic bearing; andpumping the liquid lubricating medium to the heating tank by a pump, wherein the liquid lubricating medium is in a condenser. 17. The method of claim 16, further comprising a step of adjusting the amount of vapor in the two-phase low-viscosity fluid with the heating tank. 18. The method of claim 16, wherein the wherein the gas and the liquid in the lubricating medium pass into the condenser through a pipe. 19. A radial aerostatic bearing using a two-phase fluid as a lubricating medium, the aerostatic bearing comprising: a medium circulation lubrication system, the medium circulation lubrication system having: a heating tank for heating the lubrication medium to generate a high-temperature high-pressure saturated vapor, the heating tank comprising an outlet port connected to a gas-liquid groove of the radial aerostatic bearing, wherein the high temperature and pressure saturated vapor is partially condensed in the gas-liquid groove;a condenser for condensing the vapor in the lubrication medium;a pump for pumping the liquid lubricating medium to the heating tank, the pump comprising a suction port connected to the condenser and an outlet port connected to an inlet port of the heating tank;a pipe collecting discharged the vapor and liquid lubricating medium from the radial aerostatic bearing, and then pass into the condenser;a metal housing in the shape of shallow cylindrical seat;an inner wall surface of the metal housing having a vapor-liquid groove;a porous material ring that is coaxially mounted in the cylindrical seat and have a plurality of radial holes disposed in an even, spaced-apart relationship, wherein the radial holes of the rings are connected to the housing groove to provide fluid to the porous ring;an outer wall of the radial aerostatic bearing metal housing having a radial hole, whereby the gas outlet port of the heating tank connects to the housing groove through the radial hole;a disc seat having an accommodating groove; andwhereby the gas outlet port of the heating tank connects to the housing radial hole of the radial aerostatic bearing.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.