Pilot valve controlled positive and negative pressure relief valves
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16K-017/10
B60K-015/035
G05D-016/10
F16K-017/196
B60K-015/03
출원번호
US-0256729
(2016-09-05)
등록번호
US-10047872
(2018-08-14)
발명자
/ 주소
Shelly, Mark Alan
출원인 / 주소
The Boeing Company
대리인 / 주소
Miller, Matthias & Hull LLP
인용정보
피인용 횟수 :
0인용 특허 :
5
초록▼
Concepts and technologies disclosed herein for relief valves (“relief valves”). A relief valve can include a flow path, a primary valve poppet that is urged or biased into a closed position by a tensioned spring, and a pilot valve in communication with a valve compartment of the relief valve. When a
Concepts and technologies disclosed herein for relief valves (“relief valves”). A relief valve can include a flow path, a primary valve poppet that is urged or biased into a closed position by a tensioned spring, and a pilot valve in communication with a valve compartment of the relief valve. When an exterior space pressure overcomes the tensioned spring, the primary valve poppet can be overcome and pressure between an interior space and the exterior space can equalize, at least partially. When the pressure within the interior space increases beyond a defined threshold, which can be defined by a spring of the pilot valve, the pilot valve can open, the valve compartment can vent, and the tensioned spring again can be overcome and can open to allow at least partial equalization of pressures within the interior space and the exterior space.
대표청구항▼
1. A bidirectional relief valve comprising: a valve body disposed between a first space and a second space, the valve body at least partially defining a valve compartment, a flow path formed through the valve body configured to fluidly communicate between the first space and the valve compartment;a
1. A bidirectional relief valve comprising: a valve body disposed between a first space and a second space, the valve body at least partially defining a valve compartment, a flow path formed through the valve body configured to fluidly communicate between the first space and the valve compartment;a primary valve poppet located within the valve compartment and configured to close off a main relief valve outlet fluidly communicating between the valve compartment and the second space; anda pilot valve having a pilot valve seal disposed in a pilot valve flow path extending through the valve body, the pilot valve flow path configured to fluidly communicate between the first space and the valve compartment independently of the flow path, the pilot valve further having an opening into an ambient pressure sense line configured to fluidly communicate between the pilot valve and the second space, and comprising a pilot valve poppet with an exposed end of the pilot valve poppet that is directly exposed to the first space such that a pressure associated with the first space is continuously applied to the exposed end of the pilot valve poppet,wherein the configuration of the valve compartment, the primary valve poppet, and the pilot valve opens the fluid pathway between the first space and the second space in response to a threshold positive pressure differential between the first space and the second space and in response to a threshold negative pressure differential between the first space and the second space. 2. The relief valve of claim 1, further comprising a primary valve poppet spring located within the valve compartment and configured to bias the primary valve poppet into a sealed position at which the fluid pathway is obstructed. 3. The relief valve of claim 2, further comprising a poppet shaft bore annulus extending through the valve body and configured to fluidly communicate between the first space and the valve compartment independently of the flow path and the pilot valve flow path, the poppet shaft bore annulus further being configured to allow pressure equalization between the valve compartment and the first space. 4. The relief valve of claim 1, wherein the pilot valve further comprises: a pilot valve body;the pilot valve poppet located within the pilot valve body; anda pilot valve spring located between at least a portion of the pilot valve poppet and at least a portion of the pilot valve body, the pilot valve spring being configured to bias the pilot valve poppet into a sealed position at which the pilot valve flow path is obstructed by the pilot valve seal. 5. The relief valve of claim 1, wherein the pilot valve is configured to open at a crack pressure, and wherein opening of the pilot valve allows fluid to flow between the valve compartment and the second space, and wherein the first space comprises an interior of a fuel tank and the second space comprises an exterior space. 6. The relief valve of claim 1, further comprising: a valve seal between the primary valve poppet and at least a portion of the valve compartment; anda poppet seal between the pilot valve poppet and at least a portion of the pilot valve body. 7. The relief valve of claim 6, wherein the primary valve poppet comprises a portion exposed to the first space via the flow path, and wherein the primary valve poppet further comprises a poppet shaft configured to extend into the first space via a poppet shaft bore annulus. 8. The relief valve of claim 1, wherein the pilot valve is configured to open at a specified pressure, wherein the specified pressure is substantially equal to a tension of a pilot valve spring configured to close the pilot valve. 9. The relief valve of claim 1, wherein the relief valve is configured to open when a pressure within the first space exceeds a defined positive pressure threshold. 10. The relief valve of claim 1, wherein the relief valve is configured to open when a pressure within the first space falls below a defined negative pressure threshold. 11. The relief valve of claim 1, wherein the relief valve is configured to increase a force on the primary valve poppet while the pressure in the first space increases. 12. The relief valve of claim 11, wherein the relief valve is configured to increase the force until the pilot valve opens. 13. The relief valve of claim 1, wherein an aperture is formed in the valve body and configured to fluidly communicate between the first space and the valve compartment independently of the flow path and the pilot valve flow path, and wherein the ambient pressure sense line is configured to permit a first flow rate of fluid from the valve compartment to the second space that exceeds a second flow rate of fluid through the aperture from the first space to the valve compartment. 14. A tank, comprising: a relief valve that includes a valve body, the valve body being positioned within an interior space of the tank and including a valve compartment being configured to provide a fluid pathway between the interior space of the tank and an exterior space, the valve compartment comprising: a primary valve poppet located within the valve compartment;a poppet shaft connected to the primary valve poppet, at least a portion of the poppet shaft passing through a poppet shaft bore annulus, the poppet shaft bore annulus being configured to allow fluid flow between the interior space and the valve compartment; anda pilot valve located in an opening into the valve compartment and within the interior space of the tank such that one end of the pilot valve abuts the valve compartment and an opposing end of the pilot valve abuts the interior space of the tank, a further opening into an ambient pressure sense line between the pilot valve and the exterior space,wherein the relief valve is configured to at least partially relieve a positive and a negative pressure differential between the interior space and the exterior space. 15. The tank of claim 14, wherein the valve compartment and the exterior space via the ambient pressure sense line has a first flow rate that exceeds a second flow rate between the interior space and the valve compartment. 16. The tank of claim 14, wherein the pilot valve further comprises: a pilot valve body;a pilot valve poppet located within the pilot valve body and comprising the exposed end that is directly exposed to the interior space; anda pilot valve spring located between at least a portion of the pilot valve poppet and at least a portion of the pilot valve body, the pilot valve spring being configured to urge the pilot valve poppet into a sealed position at which the opening is obstructed by a pilot valve seal attached to the pilot valve poppet. 17. The tank of claim 14, further comprising a primary valve poppet spring located within the valve compartment, the primary valve poppet spring being configured to bias the primary valve poppet into a sealed position at which the fluid pathway is obstructed. 18. The tank of claim 14, wherein the pilot valve is configured to open at a crack pressure, and wherein opening of the pilot valve allows fluid to flow between the valve compartment and the exterior space via the ambient pressure sense line. 19. The tank of claim 14, further comprising: a valve seal between the primary valve poppet and at least a portion of a tank boundary of the tank; anda poppet seal between the primary valve poppet and at least a further portion of the tank boundary of the tank, wherein the primary valve poppet comprises a portion exposed to the interior space via a flow path formed in the valve compartment. 20. The tank of claim 14, wherein the relief valve is configured to open when a pressure within the interior space exceeds a defined positive pressure threshold, and wherein the relief valve is further configured to open when a pressure within the interior space drops below a defined negative pressure threshold. 21. The tank of claim 14, wherein the relief valve is configured to increase force on the primary valve poppet when the pressure in the interior space increases until the pilot valve opens.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (5)
Larsen, Soeren Michael; Joergensen, Erik Casper; Birkelund, Michael, Axial valve.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.