HIGH FLOW DIRECT ACTING VALVE

• US 20190329603A1
• Filed: 07/11/2017
• Published: 10/31/2019
• Est. Priority Date: 08/02/2016
• Status: Active Grant

• Current Assignee: Parker Intangibles LLC (Parker-Hannifin Corporation)
• Original Assignee: Parker-Hannifin Corporation
• Inventors: Qi, Yufeng, Knepple, Robert Brian, Jabcon, Leonard Joseph
• Granted Patent: US 10,870,320 B2
• Time in Patent Office: Days
• CPC Class Codes: B60C 23/00354 Details of valves
• CPC Class Codes: B60C 23/00363 Details of sealings
• CPC Class Codes: B60C 23/00372 characterised by fluid diagrams
• CPC Class Codes: F16K 1/36 Valve members for double-seat valves F16K1/44 ; for butterfly valves F16K1/222, F16K1/223
• CPC Class Codes: F16K 31/0655 Lift valves
• CPC Class Codes: F16K 31/0686 Braking, pressure equilibration, shock absorbing
• CPC Class Codes: F16K 37/005 for measuring fluid parameters F16K37/0033 takes precedence

Abstract

A novel valve that may include a self-energizing seal member with a lobe extending toward a valve seat surface, a radially outwardly extending skirt, an axially extending nose, solenoid-operated three-position valve member, a pressure sense port, and/or a pressure pick-up opening. The features of the valve may allow the valve to operate at higher flow rates while requiring less energy to operate, may have a wider pressure and/or temperature operation range, may allow bidirectional fluid flow, may be less expensive to manufacture, and/or may enable a simple and compact assembly of the valve with a pressure sensor. The self-energizing seal member may include a base portion and the lobe extending may extend at an angle from the base portion relative to a longitudinal axis. The lobe may reduce energy requirements to operate the valve compared to larger sealing contact area seals. For example, the lobe may have a small sealing area to allow the valve to be better balanced.

Claims

1. A valve including:

a valve housing including a first inlet/outlet and a second inlet/outlet;

a valve seat having a valve seat surface that circumscribes a longitudinal axis;

a valve member that is moveable along the longitudinal axis, wherein the valve member includes a first axial end that faces the valve seat surface and a second axial end that faces away from the first axial end, wherein when the valve member is in an open position, the first inlet/outlet and the second inlet/outlet are fluidly connected, and when the valve member is in a closed position, the first inlet/outlet and the second inlet/outlet are fluidly disconnected;

a cavity that is defined by the first axial end facing toward the valve seat surface; and

a self-energizing sealing member that circumscribes the longitudinal axis, wherein the sealing member includes a base portion and a lobe extending from the base portion at an angle relative to the longitudinal axis to seal against the valve seat surface when the valve member is in the closed position, wherein the base portion is at least partially disposed within the cavity and includes a lobe end that is a portion of the lobe that extends beyond the cavity; and

wherein when the valve member is in the open position a length of the base portion perpendicular to the valve seat surface is greater than a length of the lobe end perpendicular to the valve seat surface.

2. The valve of claim 1, wherein the valve member includes:

a rear end body; and

a front end valve body disposed within the rear end body, wherein the front end body and the rear end body together define the cavity.

3. The valve of claim 1, wherein the cavity circumscribes the longitudinal axis, faces radially away from the longitudinal axis, and faces axially toward the valve seat surface.

4. The valve of claim 1, wherein the valve member includes:

a radially outwardly extending flange that circumscribes the longitudinal axis at an angle and is formed in the first axial end, wherein the radially outwardly extending flange at least partially defines a first seal retaining portion of the cavity that extends tangential to the valve seat surface toward the longitudinal axis; and

a radially inwardly extending flange that circumscribes the longitudinal axis at an angle and is formed in the first axial end, wherein the radially inwardly extending flange at least partially defines a second seal retaining portion of the cavity that extends tangential to the valve seat surface and away from the first seal retaining portion, and wherein the radially inwardly extending flange extends toward the radially outwardly extending flange to define a slit that circumscribes the longitudinal axis and extends perpendicular to the to the valve seat surface;

wherein the base portion is disposed within the cavity adjacent to the radially outwardly extending flange and the radially inwardly extending flange, and the lobe end protrudes from the first axial end toward the valve seat surface.

5. The valve of claim 4, wherein the first seal retaining portion extends radially inwardly from the slit to receive a portion of the base portion, and wherein the second seal retaining portion extends axially from the slit to receive another portion of the base portion.

6. The valve of claim 4, wherein the cavity and the slit together form a spade-shaped cross-section.

7. The valve of claim 4, wherein each flange includes an annular protrusion that extends away from the valve seat surface to engage a corresponding concave surface of the base portion.

8. The valve of claim 4, wherein the cavity includes an intermediate annular seal retaining portion that extends radially inward of the second seal retaining portion, and extends axially away from the first seal retaining portion toward the second axial end of the valve member.

9. The valve of claim 1, wherein the base portion includes a radially inner lobe and a radially outer lobe that extend opposite one another, and wherein the lobe extends perpendicular to the radially inner lobe and/or the radially outer lobe at an incline to the longitudinal axis.

10. The valve of claim 1, wherein the sealing member is an x-ring seal.

11. The valve of claim 1, wherein the valve member includes:

a radially outwardly extending skirt that circumscribes the longitudinal axis and is disposed axially between a valve seat engaging surface of the first axial end and the second axial end of the valve member, whereby when a pressure at the second inlet/outlet is lower than a pressure at the first inlet/outlet, and the valve member opens, a high pressure zone forms adjacent the skirt axially between the skirt and the valve seat surface to reduce an amount of force needed to open the valve member.

12. The valve of claim 1, wherein the valve member includes:

an axially extending nose that defines a flow path that extends from an opening in the first axial end towards the second axial end to allow fluid to flow within the nose, and the nose extends axially away from the second axial end of the valve member beyond a focal point, wherein a focal point is defined by an intersection of imaginary projection lines that extend along flow paths formed between the valve member and the valve seat surface;

whereby when a fluid within the second inlet/outlet has a pressure that is higher than a pressure of fluid within the flow path defined by the nose, and the valve member opens, a high pressure zone forms in the first inlet/outlet about the nose and the flow path receives lower pressure fluid from a low pressure zone that is axially beyond the high pressure zone and that is adjacent the opening in the nose to reduce an amount of force needed to open the valve member.

13. The valve of claim 1, further including a solenoid that is operably coupled to the valve member, wherein the open position is an intermediately-open position and the valve member is moveable from the closed position to the intermediately-open position and from the intermediately-open position to a second open position that is further from the valve seat surface than the intermediately-open position;

a first resilient member that biases the valve member toward the valve seat surface; and

a second resilient member that biases the valve member toward the valve seat surface when the valve member is between the intermediately-open position and the second open position;

wherein when the valve member is in the intermediately-open position, the second resilient member compresses as the valve member moves toward the second open position, thereby causing an abrupt increase in force needed to advance the valve member toward the second open position.

14. The valve of claim 1, further including a pressure sense port in the valve housing, wherein the pressure sense port is axially opposite the first axial end of the valve member and is fluidly connected to a flow path of the valve member that extends from the first axial end toward the second axial end to allow fluid to flow through the valve member when the valve member moves between the open position and the closed position.

15. The valve of claim 1, wherein the valve member further includes a pressure pick-up opening, whereby when a pressure at the first inlet/outlet is greater than a pressure at the second inlet/outlet and the valve member opens the pressure pick-up opening is exposed pressure that is less than the highest pressure present in the first inlet/outlet.

44. A central tire inflation system including:

a control system including the valve according to claim 1 and a fluid flow line fluidly connected to the first inlet/outlet or the second inlet/outlet of the valve;

a fluid reservoir that is fluidly connectable to an outlet of the control system; and

a pressure source with an outlet fluidly connected to an inlet of the control system.

16. A valve including:

a valve housing including a first inlet/outlet and a second inlet/outlet;

a valve seat having a valve seat surface that circumscribes a longitudinal axis; and

a valve member that is moveable along the longitudinal axis, wherein the valve member includes a first axial end that faces the valve seat surface and a second axial end that faces away from the first axial end, wherein when the valve member is in an open position, the first inlet/outlet and the second inlet/outlet are fluidly connected, and when the valve member is in a closed position, the first inlet/outlet and the second inlet/outlet are fluidly disconnected;

wherein the valve member includes;

a radially outwardly extending skirt that circumscribes the longitudinal axis and is disposed axially between a valve seat engaging surface of the first axial end and the second axial end of the valve member, whereby when a pressure at the second inlet/outlet is lower than a pressure at the first inlet/outlet, and the valve member opens, a high pressure zone forms adjacent the skirt axially between the skirt and the valve seat surface to reduce an amount of force needed to open the valve member.

17-18. -18. (canceled)

19. A valve including:

a valve housing including a first inlet/outlet and a second inlet/outlet;

a valve seat having a valve seat surface that circumscribes a longitudinal axis; and

a valve member that is moveable along the longitudinal axis, wherein the valve member includes a first axial end that faces the valve seat surface and a second axial end that faces away from the first axial end, wherein when the valve member is in an open position, the first inlet/outlet and the second inlet/outlet are fluidly connected, and when the valve member is in a closed position, the first inlet/outlet and the second inlet/outlet are fluidly disconnected;

wherein the valve member includes;

an axially extending nose that defines a flow path that extends from an opening in the first axial end towards the second axial end to allow fluid to flow within the nose, and the nose extends axially away from the second axial end of the valve member beyond a focal point, wherein the focal point is defined by an intersection of imaginary projection lines that extend along flow paths formed between the valve member and the valve seat surface;

whereby when a fluid within the second inlet/outlet has a pressure that is higher than a pressure of fluid within the flow path defined by the nose, and the valve member opens, a high pressure zone forms in the first inlet/outlet about the nose and the flow path receives lower pressure fluid from a low pressure zone that is axially beyond the high pressure zone and that is adjacent the opening in the nose to prevent an increase in the amount of force needed to open the valve member.

20. The valve of claim 19, wherein the focal point is centrally disposed in the first inlet/outlet.

21-43. -43. (canceled)