Twin-screw compressor slide valve position indicator

Abstract

The invention relates to a slide valve position indicator used in a twin-screw compressor of a slide valve energy regulation mechanism, in particular to a device which adopts Hall sensors to indicate slide valve positions. The twin-screw compressor slide valve position indicator comprises the twin-screw compressor, the Hall sensors, an additional magnetic field element and a controller, the Hall sensors are mounted outside a slide valve piston cavity of the twin-screw compressor in a slot embedding or glue packaging manner, and the additional magnetic field element is fixed on a slide valve link or a slide valve in a slot embedding or bolt connection manner; the controller is mounted in an electric control cabinet; and the twin-screw compressor comprises a slide valve piston cavity cover plate, an oil supply / oil discharge passage, the slide valve piston cavity, a slide valve piston, the slide valve link, the slide valve, a slide valve spring and a spring compression plate. The design of the twin-screw compressor slide valve position indicator is reasonable, the frictional contact between the twin-screw compressor slide valve position indicator and other moving parts, motional abrasion, mechanical deformation and damage do not need to be taken into consideration, lubrication, sealing and clearance designs for the moving process of the twin-screw compressor slide valve position indicator do not need to be considered as well, and the twin-screw compressor slide valve position indicator can be reliably mounted, and is highly maintainable.

Description

technical field [0001] The invention relates to a slide valve position indication device used in a twin-screw compressor of a slide valve energy adjustment mechanism, in particular to a device using a Hall sensor as a slide valve position indication device. Background technique [0002] The sliding valve mechanism has been widely used as the energy adjustment mechanism of the twin-screw compressor. The sliding valve mechanism provides a simple and reliable function of automatically adjusting the displacement of the compressor according to the change of the load. The slide valve control principle is as follows: the slide valve mechanism is installed inside the compressor housing to provide the compressor suction bypass passage and the compressor exhaust passage. A component of a series of components such as rods, pins, sealing washers, slide valve pistons, and cover plates. The suction end of the slide valve provides a suction bypass channel. When there is a gap between the ...

AI Technical Summary

Problems solved by technology

Among these three schemes, scheme 1, the compressor design is completely different, the compressor motor, shell castings, bearings, unit controller and control software are completely different; scheme 2, the compressor needs a major design change, the suction seat or The exhaust seat is extended to install the spool valve position indicator device inside the spool valve stem, and the spool valve position indicator device will have accumulated errors and cause drift, and regular positioning and calibration are required, and its price is more expensive and maintenance is more difficult; the first two solutions It can realize stepless energy regulation, and the third solution can only realize stepwise energy regulation, by designing four slide valve positions of 100%, 75%, 50%, and 25%, but the oil circuit design is more complicated

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