Dynamic valve seal arrangement

A valve assembly (200; 400; 600) for a fuel injector that includes a sleeve member (220; 420; 620) having an interior chamber (222; 422; 622), a piston member (224; 424; 624) supported for movement within the interior chamber of the sleeve member and separating an upstream pressure side of the valve...

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Bibliographic Details
Main Authors WESTLAKE, DOUGLAS, THOMSON, NEAL, BURKE, TRAVIS RAYMOND
Format Patent
LanguageEnglish
French
German
Published 01.04.2015
Subjects
ACTUATING-FLOATS
BLASTING
COCKS
COMBUSTION APPARATUS
COMBUSTION ENGINES
COMBUSTION PROCESSES
DEVICES FOR VENTING OR AERATING
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGHVELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
LIGHTING
MECHANICAL ENGINEERING
REGULATING OR CONTROLLING COMBUSTION
SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF
TAPS
THERMAL INSULATION IN GENERAL
VALVES
WEAPONS
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Summary:A valve assembly (200; 400; 600) for a fuel injector that includes a sleeve member (220; 420; 620) having an interior chamber (222; 422; 622), a piston member (224; 424; 624) supported for movement within the interior chamber of the sleeve member and separating an upstream pressure side of the valve assembly from a downstream pressure side of the valve assembly, and a dynamic sealing device (230; 430; 630) mounted to one of the sleeve member and the piston member for sealingly isolating the upstream pressure side of the valve assembly from the downstream pressure side of the valve assembly. The dynamic sealing assembly includes a PTFE seal member (232; 432; 632) having a generally C-shaped cross-section defining an internal cavity (234; 434; 634) having an opening (236; 436; 636) about the outer periphery thereof the seal member, and a helical spring (238; 438; 638) disposed within the internal cavity of the seal member for providing a constant sealing force to the seal member. The dynamic sealing device is positioned in the valve assembly so that the opening of the internal cavity of the seal member faces away from the upstream pressure side of the valve assembly and towards the downstream pressure side of the valve assembly.
Bibliography:Application Number: EP20140164174