Full-oil-free lubrication sealing type gas compressor

Abstract

The invention discloses a full-oil-free lubrication sealing type gas compressor which has the technical proposal that an inner bearing seat is sheathed at the outer ring of a main bearing, a seal groove arranged between the inner bearing seat and a contact surface of a crankcase is internally provided with a sealing ring, an inner rotor of a magnetic coupling is fixed on a power input end of a crank shaft by a key, the inner bearing seat is fixedly provided with an insulating cover of the magnetic coupling, an outer rotor of the magnetic coupling is fixedly connected with a power input shaft which is provided with a bearing, an outer bearing seat is sheathed at the outer ring of the bearing, a concentric cover is arranged outside the outer rotor of the magnetic coupling, and flanges at the two ends of the concentric cover are respectively fixed and connected with the inner and the outer bearing seats. On the basis of the full-oil-free lubrication sealing type gas compressor, the unique moving seal part which is the power input end of the crank shaft is designed to be a closed structure, and the magnetic coupling is adopted for realizing power input, so that the compressed gaseous medium is ensured not to be polluted by lubricating oil, and the compressed gas is not leaked. Therefore, the whole machine has low cost and high reliability.

Description

(1) Technical field: [0001] The invention relates to a gas compressor, in particular to a fully oil-free lubricated and sealed gas compressor. (two) background technology: [0002] At present, special gas compressors are widely used in all walks of life. Some occasions that use dangerous, toxic or precious gases have strict requirements on the sealing performance of the machine, such as helium compressors, H 2 SF used in compressors and high-voltage substations 6 compressor etc. At this stage, most of them are imported from abroad, and the price is very expensive. All of them are made to order, and the delivery time is as long as several months or even one year. Domestic machines cannot be 100% leak-free in the sealing of the whole machine, especially in the dynamic sealing part. Some traditional sealing methods, such as piston rings, packing and other sealing schemes, generally have a leakage rate of more than 2%; for better semi-closed structures, the shaft end adopts a...

AI Technical Summary

Problems solved by technology

However, this kind of oil-free lubricated air compressor cannot be used directly as some special gas compressors, because the power input end of the crankshaft is a dynamic sealing part, which cannot achieve zero leakage, and with the extension of use time, due to wear, The amount of leakage will increase

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