Induction regulator

Abstract: An induction regulator valve is incorporated in the induction manifold of a compressor to provide for infinitely variable regulation of the output from the rotary type compressor, in particular the screw-type compressor. The closing piece of the induction regulator valve can be adjusted by means of an actuator system. To improve this regulation performance of this system, in particular to reduce its sensitivity when the regulator valve is almost closed, the spring system is formed so that its stiffness varies along the length of its spring path, the stiffness of the spring system being smaller when the induction regulator valve is open than when it approaches the closed position of the closing piece of the induction regulator valve.

Abstract: The invention relates to an apparatus and a method for detecting a partial discharge of a power transformer by utilizing a fluorescence fiber, more particular to a simulation experiment apparatus and a method thereof for a partial discharge of a needle-board electrode in a power transformer. The apparatus provided in the invention mainly comprises: an induction regulator; a dizziness-free test transformer; a partial discharge protective resistance; a standard capacitance voltage divider; a partial discharge generator, which is formed by a needle-board electrode, a fluorescence fiber and a housing; a photomultiplier; a direct current regulated power supply; and an oscilloscope and the like. According to the method provided in the invention, the apparatus is utilized; and a needle-board electrode partial discharge experiment in the air of a power transformer is simulated. According to the invention, partial discharge experiments of a transformer with different exerted voltages and in different spacings are simulated; besides, the apparatus has advantages of strong anti-interference capability, good insulating property and high detection sensitivity and the like. Moreover, the apparatus and the method can be widely applied to luminous characteristic researches of a power transformer on floating potential partial discharge, insulator surface discharge and partial discharge in a transformer oil and an SF6 of a GIS in the air medium.