Redundant seal for wind turbine hydraulic brakes

A caliper brake featuring a hydraulic piston assembly includes a housing, a movable piston within a chamber of the housing, a first port providing a first fluid pathway into the chamber, and a redundant seal assembly. The redundant seal assembly may include a first pressure seal disposed about a fir...

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Bibliographische Detailangaben
Hauptverfasser:	Winslow, Christopher James, King, Matthew Kenneth
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING BRAKES CLUTCHES COUPLINGS FOR TRANSMITTING ROTATION ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MACHINES OR ENGINES FOR LIQUIDS MECHANICAL ENGINEERING OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR PRODUCING MECHANICAL POWER THERMAL INSULATION IN GENERAL WEAPONS WIND MOTORS WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS
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Beschreibung
Zusammenfassung:	A caliper brake featuring a hydraulic piston assembly includes a housing, a movable piston within a chamber of the housing, a first port providing a first fluid pathway into the chamber, and a redundant seal assembly. The redundant seal assembly may include a first pressure seal disposed about a first interior circumference of the chamber disposed above the first port, a second pressure seal disposed about a second interior circumference of the chamber disposed above the first pressure seal, and a second port disposed between the first pressure seal and the second pressure seal, the second port providing a second fluid pathway from inside of the chamber to outside of the chamber, and the second port establishing a bleed-off for fluid traversing above the first pressure seal such that the second pressure seal experiences a lower fluid pressure than the first pressure seal during normal operation of the caliper brake.