A hydraulic system with a dynamic seal

• Main Authors: EGELJA ALEKSANDAR M, SOROKINE MIKHAIL A, BESCHORNER MATTHEW J, AARDEMA JAMES A, HUGHES ERIC C, HAJEK THOMAS J
• Format: Patent
• Language: English
• Published: 24.06.2015
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; TAPS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

A system can include one or more valve arrangements (12, 240, 242, 244, 246, 410, 510, 312, 314, or 316) with a working chamber (W) to receive a working fluid at a first pressure, and a control chamber (C) to receive fluid at a second pressure. A dynamic seal (58 or 420) can be disposed on a land (55 or 451) of a valve element (22 or 420). The valve arrangement may include a sleeve (450) against which the dynamic seal is slidably engaged. The valve element may include a check stem (480). A pressure compensating system (500) may be in communication with bores formed in with the valve element. A pressure-monitoring system (99) to monitor dynamic seal wear may be in communication with the control chamber of the valve arrangement.