IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0109600
(2005-04-19)
|
등록번호 |
US-7300060
(2007-11-27)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- Flowserve Management Company
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
7 |
초록
▼
A staged seal assembly having a plurality of staged seals and an external pressure breakdown device connected to the seal assembly and configured to be connected to an external device, wherein each staged seal includes a shaft seal and a seal bypass. The seal bypass includes a pressure breakdown dev
A staged seal assembly having a plurality of staged seals and an external pressure breakdown device connected to the seal assembly and configured to be connected to an external device, wherein each staged seal includes a shaft seal and a seal bypass. The seal bypass includes a pressure breakdown device and directs a portion of fluid through the pressure breakdown device bypassing the respective shaft seal. The staged seal assembly may be configured to be installed in a new installation or replace an existing, seal assembly while substantially maintaining equal pressure reductions across each staged seal and substantially matching the fluid parameters of an external device originally connected to the seal assembly being replaced.
대표청구항
▼
What is claimed is: 1. A staged seal assembly, comprising: a first staged seal for sealing along a rotating shaft, said first staged seal comprising a first shaft seal and a first seal bypass, wherein said first seal bypass directs a portion of fluid through a first pressure breakdown device that i
What is claimed is: 1. A staged seal assembly, comprising: a first staged seal for sealing along a rotating shaft, said first staged seal comprising a first shaft seal and a first seal bypass, wherein said first seal bypass directs a portion of fluid through a first pressure breakdown device that is parallel to said first shaft seal; a second staged seal for sealing along said rotating shaft disposed in series with said first staged seal, said second staged seal comprising a second shaft seal and a second seal bypass, wherein said second seal bypass is fluidly connected to said first seal bypass at a first node and directs a portion of fluid from said first seal bypass through a second pressure breakdown device that is parallel to said second shaft seal; and a third pressure breakdown device that is fluidly connected to said first and second seal bypasses at said first node such that a portion of fluid from said first node through said third pressure breakdown device. 2. The seal assembly according to claim 1, wherein said third pressure breakdown device is configured to adapt said staged seal assembly to replace an existing, non-staged seal assembly along a shaft. 3. The seal assembly according to claim 1, wherein said third pressure breakdown device operates to maintain substantially equal pressure reductions across each of said first and second staged seals. 4. The seal assembly according to claim 1, wherein said third pressure breakdown device is configured to substantially match the flow and pressure parameters of an existing, external device. 5. The seal assembly according to claim 4, wherein said flow parameter is from about 1 g/min. to about 8 g/min and said pressure parameter is from about 5 psi to about 100 psi. 6. The seal assembly according to claim 1, wherein said first and second pressure breakdown devices of said respective first and second staged seals are controlled pressure breakdown devices. 7. The seal assembly according to claim 1, wherein said first and second pressure breakdown devices of said respective first and second staged seals are active pressure breakdown devices. 8. The seal assembly according to claim 1, further comprising: an inlet configured to circulate a fluid into said first staged seal; a valve connected to an outlet of said seal assembly; and a bimetallic strip connected to said valve and configured to close said valve at a set temperature of the fluid entering said first staged seal. 9. The seal assembly according to claim 1, further comprising: a valve connected to an outlet of said seal assembly; and a thermal shape memory alloy connected to said valve and configured to close said valve at a set temperature of the fluid entering said first staged seal. 10. The staged seal assembly according to claim 1, wherein said third pressure breakdown device is fluidly connected to an existing external device such that fluid from said seal assembly may flow through said third pressure breakdown device into said external device. 11. The staged seal assembly according to claim 10, wherein said external device is a volume control tank. 12. The staged seal assembly according to claim 1, wherein said staged seal assembly provides a seal for a shaft of a primary coolant pump. 13. The staged seal assembly according to claim 1, wherein said staged seal assembly provides a seal for a shaft of a mixer. 14. The staged seal assembly according to claim 1, wherein said first, second, and third pressure breakdown devices are a length of coiled tubing. 15. The seal assembly according to claim 1, wherein said third pressure breakdown device is operable to cause fluid exiting said third pressure breakdown device to have fluid parameters that substantially match the fluid parameters of an existing, external device. 16. The staged seal assembly according to claim 1, wherein said third pressure breakdown device permits the adjustment of a first pressure reduction across said first staged seal and a second pressure reduction across said second staged seal such that said first and second pressure reductions are unequal to one another. 17. The staged seal according to claim 1, wherein a first pressure reduction across said first staged seal is about 950 psi and a second pressure reduction across said second staged seal is about 1000 psi. 18. A method for replacing a non-staged seal assembly with a staged seal assembly, comprising removing a non-staged seal assembly from a shaft; providing a staged seal assembly according to claim 1; connecting said third pressure breakdown device from the first node to an existing external device; manipulating a pressure reduction across said third pressure breakdown in order to control a first pressure reduction across said first stage seal and a second pressure reduction across said second stage seal. 19. The method according to claim 18, wherein said first and second pressure reductions are not equal to one another. 20. A staged seal assembly, comprising: a first staged seal for sealing along a rotating shaft, the first staged seal comprising a first shaft seal and a first seal bypass, wherein the first seal bypass directs a portion of fluid through a first pressure breakdown device that is parallel to the first shaft seal; a second staged seal for sealing along the rotating shaft disposed in series with the first staged seal, the second staged seal comprising a second shaft seal and a second seal bypass, wherein the second seal bypass is fluidly connected to the first seal bypass and directs a portion of fluid from the first seal bypass through a second pressure breakdown device that is parallel to the second shaft seal; a third stage seal for sealing along the rotating shaft disposed in series with the second staged seal, the third staged seal comprising a third shaft seal and a third seal bypass, wherein the third seal bypass is fluidly connected to the second seal bypass and directs a portion of fluid from the second seal bypass through a third pressure breakdown device that is parallel to the third shaft seal; and a flow channel having a fourth pressure breakdown device that is fluidly connected between the first and second seal bypasses and directs a portion of fluid from the first and second bypasses through the fourth pressure breakdown device. 21. The seal assembly according to claim 20, wherein said pressure reduction across said first staged seal is from about 850 psi, to about 1050 psi, said second staged seal is from 900 psi to about 1000 psi, and said third stage is from 200 psi to about 400 psi. 22. A staged seal assembly, comprising: two or more shaft seals disposed in series for sealing along a rotating shaft; two or more pressure breakdown devices, wherein each one of said two or more pressure breakdown devices provides a parallel flow path around a respective one of said two or more shaft seals, and wherein said two or more pressure breakdown devices are connected to each other in series; an external pressure breakdown device for controlling pressure reductions across said two or more shaft seals and fluidly connected between two of said two or more pressure breakdown devices.
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