Dynamic seal wear mitigation system

摘要

A system can include one or more valve arrangements with a working chamber to receive a working fluid at a first pressure, and a control chamber to receive fluid at a second pressure. A dynamic seal can be disposed on a land of a valve element. A supply passage can be in communication between the control chamber and a tank and can include a check valve. A relief valve can be disposed between the check valve and the control chamber. A pilot pump and another relief valve may be disposed upstream of the check valve. The relief valve downstream of the check valve can have a higher pressure limit than the downstream one. A pressure sensor may be disposed between the check valve and the control chamber and used to warn the operator of a high pressure in the control chamber.

主权项

1. A system, comprising:
at least one valve device including a valve body and a valve element slidably disposed within a passageway formed in the valve body, wherein a first segment of the valve element and the valve body are arranged to define a working chamber to receive a working fluid at a first pressure, and the valve body and the valve element are arranged to define a control chamber to receive a control fluid at a second pressure, the valve element having a land; and an annular seal element disposed between the land and an inner surface, wherein the seal element and the land are together arranged to separate the working chamber and the control chamber and to move with axial movement of the valve element; and a pressure monitoring system fluidly coupled to the control chamber; and a controller in communication with the pressure monitoring system, configured to:
receive a signal indicative of the second pressure;compare the second pressure with a predetermined pressure; andcommunicate a signal to an operator when the second pressure is at or above the predetermined pressure.