SU931967A1 - Rotary pneumatic engine with silencers - Google Patents

Description

(5) ROTAC1 | ONE PNEUMATIC MOTOR WITH A silencer

I

The invention relates to mechanical engineering, to rotary pneumatic motors.

Known rotary pneumatic engine with a silencer, communicated with the outlet of the pneumatic path 1.

The disadvantage of this pneumatic engine is that the silencer is installed at some distance from it and the treated air flowing out of the air motor exhaust port generates strong sound vibrations in the pneumatic path.

Closest to the present invention is a rotary air motor with a silencer, comprising a cylindrical stator with inlet and outlet openings, a rotor with blades, eccentrically mounted in it, a cylindrical silencer body, concentrically mounted relative to the stator and covering it with

formation of a silencing chamber, a cylindrical porous ring inside the silencing chamber, overlapping the stator inlets and the silencer housing.

The disadvantage of this rotary air motor is due to the fact that during operation the pores of the cylindrical porous ring are clogged with solid particles.

10 contained in the air. The main part of the solid particles is deposited on the surface of the porous ring from the air inlet side, reducing its service life and reducing the efficiency

15 noise suppression.

The purpose of the invention is to clean a cylindrical porous ring with a stream of exhaust air and increase the efficiency of a silencer.

20

This goal is achieved by the fact that the cylindrical porous ring is set eccentrically in the chamber

silencer with the possibility. Turning about its axis.

The ring is made with sections of variable porosity, and the least dense is the area overlapping the outlet opening of the stator.

Such an embodiment of the device ensures the cleaning of the cylindrical porous ring of solid particles contained in the air by the flow of exhaust air and increases the effect of the silencer.

FIG. 1 shows a rotary air motor with a silencer, cross section; in fig. 2 the same longitudinal section.

The rotary pneumatic engine with a silencer contains a cylindrical stator 1 with an inlet (not shown) and an outlet 2 apertures, a rotor 3 with blades 4, eccentrically mounted in it with the formation of a working cavity 5, a silencer 6.

The muffler 6 contains a cylindrical body 7, concentrically mounted relative to the stator 1 and covering it with the formation of chambers 8, a cylindrical porous ring

9in the chamber 8, blocking the inlet 2 of the stator 1 by the section 10 with the lowest density and the outlet 11 of the housing 7 of the silencer 6 and forming with the stator 1 and the housing 7 cavities 12 and 13 of the silencer 6.

Rotary air motor operates as follows.

Air is supplied through an inlet (not shown) of the stator 1 into the working cavity 5 of the rotary air motor, rotating the rotor 3 with the blades k and doing work. Exhaust air, coming out of the outlet of the 2stator 1, sequentially passes through the section

10 cylindrical porous ring and further, twice crossing it and the passage through the cavities 12 and 13, goes

.in atmosphere.

The solid particles contained in the exhaust air are deposited on the cylindrical surface of the porous ring from the air inlet side. When turning the porous cylindrical

rings around its axis, the air in some areas acts in the opposite direction and blows solid particles into the atmosphere. In this way, the pores of the cylindrical porous ring 9 are cleaned. In order to increase the noise attenuation efficiency, the cylindrical porous ring is made with variable porosity areas, and the least dense section is 10, which overlaps the outlet opening 2 of the stator 1.

Thanks to the proposed technical solution, the service life of the silencer is increased and its efficiency is increased.

Claims (2)

Invention Formula one . Rotary air motor with a silencer, containing a cylindrical stator with inlet and outlet legs, a rotor with blades eccentrically mounted in it, a cylindrical silencer body, concentrically mounted relative to the stator and covering it with the formation of a silencer chamber, a cylindrical porous ring inside the silencer chamber overlapping stator and muffler housing inlets, characterized in that, c. the purpose of cleaning a cylindrical porous ring with a stream of exhaust air, it is installed eccentrically in the chamber of the muffler with the possibility of rotation about its axis. 2. The engine according to claim 1, wherein the cylindrical porous ring is made with variable porosity in order to increase the sound attenuation efficiency, the segment overlapping the outlet of the stator being the least dense. Sources of information taken into account in the examination 1. USSR Author's Certificate No. 313652, cl. B 25 D 17/12, 1971. 2.Zelenetsky S.V., R bkov E..D., Mikerov AG Rotary pneumatic motors. L., Mechanical Engineering, 1976, p. 227, fig. 128 (2).