Directional valve and method of operation
AssigneeSPX Corporation
InventorMichael T. Landrum
Life of this patent
Estimating the term…
Abstract
A valve is provided. The valve may include: an axially movable spool having a conical valve portion and dissipating disk portion; a valve housing defining a valve cavity in which the spool resides; a first port in the valve housing; a second port in the valve housing; a land defined by the housing; a wide portion in the housing; and a valve seat defined, at least in part, by the valve housing configured to form a seal with the conical valve portion, wherein the land, the wide portion, the conical valve portion, and the valve seat are dimensioned to cause the disk portion and the land to be proximate to each other when the valve section is near the valve seat and the disk portion is proximate to the wide portion when the valve section is away from the valve seat.
Claims20
A valve comprising:
- an axially movable spool having a conical valve portion and dissipating disk portion;
- a valve housing defining a valve cavity in which the spool resides;
- a first port in the valve housing configured to provide fluid communication from outside the valve housing to the valve cavity;
- a second port in the valve housing configured to provide fluid communication from outside the valve housing to the valve cavity;
- a land defined by the housing to provide a small tolerance between the land and the disk portion when the spool is in a position to cause the disk portion to be proximate to the land;
- a wide portion in the housing to provide a large tolerance between the land and the disk portion when the spool is in a position to cause the disk portion to be proximate to the wide portion;
- and
- a valve seat defined, at least in part, by the valve housing configured to form a seal with the conical valve portion when the spool is in a position to cause the conical valve portion to be pressed against the valve seat and the disk portion, the land, the wide portion, the conical valve portion, and the valve seat are dimensioned to cause the disk portion and the land to be proximate to each other when the valve section is near the valve seat and the disk portion is proximate to the wide portion when the valve section is away from the valve seat.
A method of reducing erosion within the valve assembly comprising:
- configuring a valve to restrict fluid flow through the valve at a place in the valve away from the valve seat when a conical valve portion is proximate to a valve seat;
- and
- configuring the valve to open flow through the valve when the conical valve portion is not proximate to the valve seat.
A valve comprising:
- an axially movable valving means having a conical valve portion and dissipating disk portion;
- a means for housing defining a valve cavity in which the valving means resides;
- a first port in the housing means configured to provide fluid communication from outside the housing means to the valve cavity;
- a second port in the housing means configured to provide fluid communication from outside the housing means to the valve cavity;
- a means for constricting defined by the housing means to provide a small tolerance between the means for constricting and the disk portion when the valving means is in a position to cause the disk portion to be proximate to the means for constricting;
- a wide portion in the housing to provide a large tolerance between the means for constricting and the disk portion when the valving means is in a position to cause the disk portion to be proximate to the wide portion;
- and
- a valve seat defined, at least in part, by the means for housing configured to form a seal with the conical valve portion when the valving means is in a position to cause the conical valve portion to be pressed against the valve seat and the disk portion, the means for constricting, the wide portion, the conical valve portion, and the valve seat are dimensioned to cause the disk portion and the means for constricting to be proximate to each other when the valve section is near the valve seat and the disk portion is proximate to the wide portion when the valve section is away from the valve seat.
Dependencies are inferred from the claim text.