Pressure regulator

• Main Author: BICKLEY DANIEL J
• Format: Patent
• Language: English
• Published: 05.10.2006
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BLASTING; BRAKES; CLUTCHES; COMBUSTION ENGINES; CONTROLLING; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; COUPLINGS FOR TRANSMITTING ROTATION; ENGINEERING ELEMENTS AND UNITS; GAS-TURBINE PLANTS; 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; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INDEXING SCHEME FOR ASPECTS RELATING TONON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES ORJET-PROPULSION PLANTS; INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04; LIGHTING; MECHANICAL ENGINEERING; PHYSICS; REGULATING; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; 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; WEAPONS

A pressure regulator comprises a housing, a metering spool movable within the housing to control the degree of opening of a metering orifice of the regulator, a first inlet through which hydraulic fluid at high pressure is supplied to said metering orifice, a first pressure chamber within the housing and containing hydraulic fluid at a reference pressure (Pref) to which one end of said metering spool is exposed, compression spring means within said first pressure chamber and acting at one end against said one end of said metering spool, an outlet from the housing downstream of said metering orifice, for hydraulic fluid at regulated pressure (Preg) from said metering orifice, a second pressure chamber containing hydraulic fluid at said regulated pressure Preg to which the opposite end of said metering spool is exposed, such that the metering position of the metering spool relative to the housing is a position of equilibrium between the force of the spring and Pref acting on one end of said metering spool and Preg acting on the other end of the metering spool, said equilibrium position changing to maintain a predetermined pressure difference (Pdiff) between Pref and Preg, and the regulator further including an abutment against which the opposite end of said compression spring means reacts and a third pressure chamber containing hydraulic fluid at a control pressure (Pcon) acting on said abutment, whereby the value of Pcon, can be changed to adjust the position of said abutment relative to the housing of the regulator to change the pre-load of said compression spring means thereby to adjust the value of Pdiff.