Improved volumetric compressor

Abstract

A compression device compresses a gas by means of a compression fluid includes a compression chamber for the generation of a compressed mixture of the gas and the compression fluid. A first driving compression rotor and a second compression rotor mesh with each other and are housed inside the compression chamber. The first driving rotor includes an end that projects from a wall of the compression chamber. A power source includes a transmission shaft suited to be set rotating by the power source. A transmission unit is interposed between the power source and the first driving rotor in such a way as to transmit the rotation of the transmission shaft to the first driving rotor. Containment means define a housing chamber to house the transmission unit. The wall of the compression chamber is at least partially defined by a wall of the containment means of the transmission unit.

Description

TECHNICAL FIELD OF THE INVENTION[0001]The present invention concerns the technical field of devices for the production of compressed gas, preferably compressed air.[0002]In particular, the present invention concerns the technical field of volumetric compressors.[0003]In greater detail, the present invention concerns a volumetric screw compressor with oil injection.DESCRIPTION OF THE STATE OF THE ART[0004]The use of devices for the generation of compressed gas is known in several sectors, typically but not exclusively in the industrial field.[0005]Said devices for the generation of compressed gas, here below simply referred to as compressors, are suitable for the intake of a gas, typically air, and for treating the same in order to increase its pressure while it flows towards an outlet way.[0006]Among the compressors of known type, the so-called volumetric screw compressors with lubricating fluid (oil) injection offer several advantages such as, for example, high efficiency and relia...

AI Technical Summary

Benefits of technology

The patent text describes a device that prevents wear and tear on the end of a driving rotor by using an annular element as an interface between the sealing element and the end of the driving rotor. The technical effect of this is to improve the durability of the device and minimize maintenance costs.

Problems solved by technology

A first drawback is related to the constructive complexity that characterizes this type of compressors, which leads to an increase in their weight and overall dimensions.

Said constructive complexity also increases the tendency of the various parts making up the compressor to wear out.

A further drawback deriving from said constructive complexity is the risk of errors being made during the assembly operations, which may lead to wear and noise exceeding the acceptable levels.

Another drawback lies in the need to use particularly sensitive and expensive sealing elements in order to ensure that the tightness obtained is sufficient to resist the pressure difference of the oils contained in the compression chamber and in the casing of the transmission unit and thus to prevent the two oils from flowing therethrough and mixing.

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