In one featured embodiment, a piston for a valve comprises a cylindrical body surrounding a center axis and defined by an overall length extending from an upstream end to a downstream end. The cylindrical body has a piston bore configured to receive a spring assembly. The cylindrical body has a maxi
In one featured embodiment, a piston for a valve comprises a cylindrical body surrounding a center axis and defined by an overall length extending from an upstream end to a downstream end. The cylindrical body has a piston bore configured to receive a spring assembly. The cylindrical body has a maximum outer diameter that comprises a closure sleeve contact surface, and the cylindrical body is defined by a first length that is less than the overall length. A ratio of the first length to the maximum outer diameter is between 1.0 and 1.2.
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1. A piston for a valve comprising: a cylindrical body surrounding a center axis and defined by an overall length extending from an upstream end to a downstream end, wherein the cylindrical body has a piston bore configured to receive a spring assembly, and wherein the cylindrical body has a maximum
1. A piston for a valve comprising: a cylindrical body surrounding a center axis and defined by an overall length extending from an upstream end to a downstream end, wherein the cylindrical body has a piston bore configured to receive a spring assembly, and wherein the cylindrical body has a maximum outer diameter that comprises a closure sleeve contact surface, and wherein the cylindrical body is defined by a first length that extends from the maximum outer diameter at the upstream end to the maximum outer diameter at the downstream end, the first length being less than the overall length, and wherein a ratio of the first length to the maximum outer diameter is between 1.0 and 1.2, and wherein the cylindrical body includes first and second outer surface portions that are axially spaced apart from each other and which are both defined by the maximum outer diameter, and includes an undercut portion providing a central outer surface portion that is between the first and second outer surface portions, the undercut portion being defined by an undercut outer diameter, and wherein a ratio of the undercut outer diameter to the maximum outer diameter is between 0.8 and 1.0. 2. A piston for a valve comprising: a cylindrical body surrounding a center axis and defined by an overall length extending from an upstream end to a downstream end, wherein the cylindrical body has a piston bore configured to receive a spring assembly, and wherein the cylindrical body has a maximum outer diameter that comprises a closure sleeve contact surface, and wherein the cylindrical body is defined by a first length that is less than the overall length, and wherein a ratio of the first length to the maximum outer diameter is between 1.0 and 1.2; anda boss portion formed at the upstream end of the cylindrical body, the boss portion enclosing one end of the piston bore leaving an opposite end of the piston bore open to receive the spring assembly, and wherein the boss portion comprises a seat for a pivoting half ball, the seat comprising a conical surface formed within the boss portion and being defined by a conical angle, and wherein the conical angle is within a range between 100 and 120 degrees. 3. The piston according to claim 2, wherein the seat comprises a conical opening defined by a conical surface formed within the boss portion, and wherein the conical opening is defined by a depth extending from an apex of the conical surface to an end face of the boss portion, and wherein a ratio of the depth to a boss outer diameter is between 0.3 and 0.4. 4. A piston for a valve comprising: a cylindrical body surrounding a center axis and defined by an overall length extending from an upstream end to a downstream end, wherein the cylindrical body has a piston bore configured to receive a spring assembly, and wherein the cylindrical body has a maximum outer diameter that comprises a closure sleeve contact surface, wherein the cylindrical body includes first and second outer surface portions that are axially spaced apart from each other and which are both defined by the maximum outer diameter, and includes an undercut portion providing a central outer surface portion that is between the first and second outer surface portions, the undercut portion being defined by an undercut outer diameter, and wherein a ratio of the undercut outer diameter to the maximum outer diameter is between 0.8 and 1.0; ana boss portion formed at the upstream end of the cylindrical body, the boss portion enclosing one end of the piston bore leaving an opposite end of the piston bore open to receive the spring assembly, and wherein the boss portion comprises a seat for a pivoting half ball and is defined by a boss outer diameter, and wherein the seat comprises a conical opening defined by a conical surface formed within the boss portion, and wherein the conical opening is defined by a depth extending from an apex of the conical surface to an end face of the boss portion, and wherein a ratio of the depth to the boss outer diameter is between 0.3 and 0.4. 5. The piston according to claim 4, wherein the cylindrical body is defined by a first length that is less than the overall length, and wherein a ratio of the first length to the maximum outer diameter is between 1.0 and 1.2. 6. A piston for a valve comprising: a cylindrical body surrounding a center axis and defined by an overall length extending from an upstream end to a downstream end, wherein the cylindrical body has a piston bore configured to receive a spring assembly, and wherein the cylindrical body has a maximum outer diameter that comprises a closure sleeve contact surface, wherein the cylindrical body includes first and second outer surface portions that are axially spaced apart from each other and which are both defined by the maximum outer diameter, and includes an undercut portion providing a central outer surface portion that is between the first and second outer surface portions, the undercut portion being defined by an undercut outer diameter, and wherein a ratio of the undercut outer diameter to the maximum outer diameter is between 0.8 and 1.0;wherein the cylindrical body is defined by a first length that is less than the overall length, and wherein a ratio of the first length to the maximum outer diameter is between 1.0 and 1.2; anda boss portion formed at the upstream end of the cylindrical body, the boss portion enclosing one end of the piston bore leaving an opposite end of the piston bore open to receive the spring assembly, and wherein the boss portion comprises a seat for a pivoting half ball, the seat comprising a conical surface formed within the boss portion and being defined by a conical angle, and wherein the conical angle is within a range between 100 and 120 degrees. 7. A piston for a valve comprising: a cylindrical body surrounding a center axis and defined by an overall length extending from an upstream end to a downstream end, wherein the cylindrical body has a piston bore configured to receive a spring assembly, and including a boss portion formed at the upstream end of the cylindrical body, the boss portion enclosing one end of the piston bore leaving an opposite end of the piston bore open to receive the spring assembly, and wherein the boss portion comprises a seat for a pivoting half ball, the seat comprising a conical surface formed within the boss portion, and wherein the boss portion is defined by a boss outer diameter, and wherein the seat comprises a conical opening defined by the conical surface, and wherein the conical opening is defined by a depth extending from an apex of the conical surface to an end face of the boss portion, and wherein a ratio of the depth to the boss outer diameter is between 0.3 and 0.4. 8. The piston according to claim 7, wherein the conical surface is defined by a conical angle, and wherein the conical angle is within a range between 100 and 120 degrees. 9. The piston according to claim 7, wherein the cylindrical body has a maximum outer diameter that comprises a closure sleeve contact surface, and wherein the cylindrical body is defined by a first length that is less than the overall length, and wherein a ratio of the first length to the maximum outer diameter is between 1.0 and 1.2. 10. The piston according to claim 7, wherein the cylindrical body portion has a maximum outer diameter that comprises a closure sleeve contact surface, and wherein the cylindrical body includes first and second outer surface portions that are axially spaced apart from each other and which are both defined by the maximum outer diameter, and includes an undercut portion providing a central outer surface portion that is between the first and second outer surface portions, the undercut portion being defined by an undercut outer diameter, and wherein a ratio of the undercut outer diameter to the maximum outer diameter is between 0.8 and 1.0. 11. A piston and closure sleeve assembly for a valve comprising: a closure sleeve comprising a sleeve body surrounding a center axis and defined by an overall length extending from an upstream end to a downstream end, wherein the sleeve body has an internal cavity that is enclosed at the downstream end and open at the upstream end, and wherein the internal cavity is defined in part by a piston contact surface that is defined by an inner diameter, and wherein the sleeve body includes at least one damping orifice defined by a damping orifice diameter; anda piston comprising a cylindrical body surrounding a center axis and defined by an overall length extending from an upstream end to a downstream end, wherein the cylindrical body has a piston bore configured to receive a spring assembly, and wherein the cylindrical body has a maximum outer diameter that comprises a closure sleeve contact surface that slides against the piston contact surface, and wherein the cylindrical body includes at least one vent window defined by a vent window diameter, and wherein a ratio of the damping orifice diameter to the vent window diameter is between 0.375 and 0.450. 12. A high pressure relief valve comprising: a valve housing defining an internal bore and having a valve inlet configured to be in fluid communication with a pump outlet;a closure sleeve at least partially received within the internal bore, the closure sleeve comprising a sleeve body surrounding a center axis, wherein the sleeve body has an internal cavity that is enclosed at the downstream end and open at the upstream end;a piston received within the internal cavity, wherein the internal cavity is defined in part by a piston contact surface, and wherein the piston comprises a cylindrical body surrounding a center axis and defined by an overall length extending from an upstream end to a downstream end, wherein the cylindrical body has a piston bore configured to receive a spring assembly, and wherein the cylindrical body has a maximum outer diameter that comprises a closure sleeve contact surface;a nozzle received within the internal bore of the valve housing and including a nozzle bore having a nozzle inlet in fluid communication with the valve inlet and a nozzle outlet;a spring assembly that biases the piston to close the nozzle outlet, and wherein when a system pressure at the nozzle outlet exceeds a predetermined pressure level, a spring biasing load is overcome to open the nozzle outlet to fluidly connect the nozzle to the internal cavity of the closure sleeve; andwherein the high pressure relief valve includes one or more of the following valve characteristics wherein the cylindrical body portion is defined by a first length that is less than the overall length, and wherein a ratio of the first length to the maximum outer diameter is between 1.0 and 1.2,wherein the cylindrical body includes first and second outer surface portions that are axially spaced apart from each other and which are both defined by the maximum outer diameter, and including an undercut portion providing a central outer surface portion that is between the first and second outer surface portions, the undercut portion being defined by an undercut outer diameter, and wherein a ratio of the undercut outer diameter to the maximum outer diameter is between 0.8 and 1.0,wherein the piston includes a boss portion formed at the upstream end of the cylindrical body, the boss portion enclosing one end of the piston bore leaving an opposite end of the piston bore open to receive the spring assembly, and wherein the boss portion comprises a seat for a pivoting half ball, the seat comprising a conical surface formed within the boss portion and being defined by a conical angle, and wherein the conical angle is within a range between 100 and 120 degrees,wherein the boss portion is defined by a boss outer diameter, and wherein the seat comprises a conical opening defined by the conical surface, and wherein the conical opening is defined by a depth extending from an apex of the conical surface to an end face of the boss portion, and wherein a ratio of the depth to the boss outer diameter is between 0.3 and 0.4,wherein the sleeve body includes at least one damping orifice defined by a damping orifice diameter, and wherein the cylindrical body of the piston includes at least one vent window defined by a vent window diameter, and wherein a ratio of the damping orifice diameter to the vent window diameter is between 0.375 and 0.450. 13. A fuel supply system incorporating: a fuel pump having a pump inlet and a pump outlet, the pump inlet being in fluid communication with a fuel supply;a metering valve receiving fuel from the fuel pump and directing the fuel to a gas turbine engine; anda high pressure relief valve upstream of the metering valve and downstream of the pump inlet, the high pressure relief valve being configured to move to an open position once system pressure downstream of the pump outlet exceeds a predetermined pressure level such the fuel can be returned to the pump inlet via the high pressure relief valve, and wherein the high pressure relief valve comprisesa valve housing defining an internal bore and having a valve inlet configured to be in fluid communication with the pump outlet;a closure sleeve at least partially received within the internal bore, the closure sleeve comprising a sleeve body surrounding a center axis, wherein the sleeve body has an internal cavity that is enclosed at the downstream end and open at the upstream end;a piston received within the internal cavity, wherein the internal cavity is defined in part by a piston contact surface, and wherein the piston comprises a cylindrical body surrounding a center axis and defined by an overall length extending from an upstream end to a downstream end, wherein the cylindrical body has a piston bore configured to receive a spring assembly, and wherein the cylindrical body has a maximum outer diameter that comprises a closure sleeve contact surface;a nozzle received within the internal bore of the valve housing and including a nozzle bore having a nozzle inlet in fluid communication with the valve inlet and a nozzle outlet;a spring assembly that biases the piston to close the nozzle outlet, and wherein when a system pressure at the nozzle outlet exceeds a predetermined pressure level, a spring biasing load is overcome to open the nozzle outlet to fluidly connect the nozzle to the internal cavity of the closure sleeve; andwherein the high pressure relief valve includes one or more of the following valve characteristics wherein the cylindrical body is defined by a first length that is less than the overall length, and wherein a ratio of the first length to the maximum outer diameter is between 1.0 and 1.2,wherein the cylindrical body includes first and second outer surface portions that are axially spaced apart from each other and which are both defined by the maximum outer diameter, and including an undercut portion providing a central outer surface portion that is between the first and second outer surface portions, the undercut portion being defined by an undercut outer diameter, and wherein a ratio of the undercut outer diameter to the maximum outer diameter is between 0.8 and 1.0,wherein the piston includes a boss portion formed at the upstream end of the cylindrical body, the boss portion enclosing one end of the piston bore leaving an opposite end of the piston bore open to receive the spring assembly, and wherein the boss portion comprises a seat for a pivoting half ball, the seat comprising a conical surface formed within the boss portion and being defined by a conical angle, and wherein the conical angle is within a range between 100 and 120 degrees,wherein the boss portion is defined by a boss outer diameter, and wherein the seat comprises a conical opening defined by the conical surface, and wherein the conical opening is defined by a depth extending from an apex of the conical surface to an end face of the boss portion, and wherein a ratio of the depth to the boss outer diameter is between 0.3 and 0.4,wherein the sleeve body includes at least one damping orifice defined by a damping orifice diameter, and wherein the cylindrical body of the piston includes at least one vent window defined by a vent window diameter, and wherein a ratio of the damping orifice diameter to the vent window diameter is between 0.375 and 0.450. 14. A method of installing a component in a high pressure relief valve including the steps of: removing a piston from a valve housing and replacing the removed piston with a replaced piston, wherein a closure sleeve is at least partially received within the valve housing and includes an internal cavity that is enclosed at a downstream end and open at an upstream end, the piston is received within the internal cavity of the closure sleeve, and wherein the piston comprises a cylindrical body surrounding a center axis and defined by an overall length extending from an upstream end to a downstream end, wherein the cylindrical body has a piston bore configured to receive a spring assembly, and wherein the cylindrical body has a maximum outer diameter that comprises a closure sleeve contact surface; andwherein if the piston is removed and replaced, the replaced piston has one or more of the following piston characteristics wherein the cylindrical body is defined by a first length that is less than the overall length, and wherein a ratio of the first length to the maximum outer diameter is between 1.0 and 1.2,wherein the cylindrical body includes first and second outer surface portions that are axially spaced apart from each other and which are both defined by the maximum outer diameter, and including an undercut portion providing a central outer surface portion that is between the first and second outer surface portions, the undercut portion being defined by an undercut outer diameter, and wherein a ratio of the undercut outer diameter to the maximum outer diameter is between 0.8 and 1.0,wherein the piston includes a boss portion formed at the upstream end of the cylindrical body, the boss portion enclosing one end of the piston bore leaving an opposite end of the piston bore open to receive the spring assembly, and wherein the boss portion comprises a seat for a pivoting half ball, the seat comprising a conical surface formed within the boss portion and being defined by a conical angle, and wherein the conical angle is within a range between 100 and 120 degrees,wherein the boss portion is defined by a boss outer diameter, and wherein the seat comprises a conical opening defined by the conical surface, and wherein the conical opening is defined by a depth extending from an apex of the conical surface to an end face of the boss portion, and wherein a ratio of the depth to the boss outer diameter is between 0.3 and 0.4.
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이 특허에 인용된 특허 (7)
Dyer Gerald P., Combined pressure regulating and fuel flow system.
Arline Samuel B. (Lake Park FL) Eder Matthias (Stuart FL) Dunlap Jeffrey J. (Stuart FL) Douglas Gary W. (Palm Beach Gardens FL), Fuel metering and actuation system.
Zemek Thomas G. (Mansfield CT) Caruolo Antonio B. (Vernon CT) Roberts Stephanie A. (Columbia SC) Dunn James K. (Columbia SC) Spearen John (Irmo SC), Method and apparatus for determining spring preloading in a fluid handling device.
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