SU794229A2 - Pneumatic motor exchaust silencer - Google Patents

Description

one

The invention relates to the field of mechanical engineering, in particular, to an exhaust air silencer of an air motor.

According to the main author. St. No. 246967 is known for an air motor exhaust silencer, comprising a cylindrical body with a flat bottom, spiral vanes connected to the bottom of the body and forming chambers among themselves, and with a wall of the body a manifold, a cover and a spigot for connecting an exhaust engine to the exhaust. The spiral-shaped blades are also connected to the lid, and the gas outlet opening is made in the wall of the housing 1.

To provide the required noise reduction, the silencer must have a sufficient volume, depending on the air flow, which, in turn, depends on the type of air motor and can vary over a wide range.

The chambers and the manifold of a known silencer have a constant volume, therefore the field of application of the silencer is limited to pneumatic engines with the same or slightly different air flow corresponding to the volume of the silencer. For air engines with a different air flow, the silencer is not applicable. An increase in the air flow rate at a constant volume of the silencer leads to a deterioration in the damping effect and an increase in power loss. With a decrease in air flow, the required noise reduction is provided, but the dimensions of the silencer are too large.

As a result, several silence sizes for air motors with different air flow rates are required.

The purpose of the invention is to expand the range of application of the muffler depending on the performance of the air motor.

The goal is achieved by the fact that the wall of the body and the blades are made of two detachable parts connected by an overlap with the possibility of moving in the axial direction and fixing their relative position.

FIG. 1 shows a general view of the proposed muffler, section; in fig. 2 - section A-A of FIG. one.

The silencer consists of a cylindrical body made of two parts 1 and 2, connected respectively to the cover 3 and the bottom 4. Spiral-shaped vanes connected to the cover and the bottom are also made from two parts 5 and 6. Parts 1 and 2 of the body and 5 and 6 The blades are overlapped and can move relative to each other in the longitudinal direction.

On the lid 3 there is an inlet 7. The blades, the bottom and the lid form chambers 8 between them, and a cylindrical case and a collector lid 9. In the cylindrical case there is a hole 10 for exhaust air to exit. Ties 4 are rigidly attached to the bottom 4 and passing through the holes in the lid 3 and fitted with nuts 12 and 13.

The silencer works in the following way.

Depending on the air flow, the pneumatic motor establishes the required volume of a silencer. To do this, releasing the nuts 12 and 13 move the cover 3 and the body parts 1 connected to it and 5 blades relative to the Bottom 4 and the body parts 2 connected to it and 6 blades to the required value.

Then in this position the lid is fixed on the bolts 11 with nuts 12 and 13.

Exhaust air through the inlet 7 enters the chamber 8 of the silencer, expands, passes into the collector 9 and exits the atmosphere through the opening 10. The noise is muffled when the air expands in the chambers and the collector, and also due to friction when passing through the holes.

The volume of the chambers and the collector corresponds to the air flow of the air motor, as a result of which the required noise reduction is achieved with minimal power loss.

Claims (1)

Invention Formula Exhaust silencer air motor on aut. St. No. 246967, characterized in that, in order to expand the field of application, depending on the performance of the air motor, the wall of the body and the blade are made of two parts, connected by an overlap with the possibility of movement in the axial direction and fixing their relative position. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 246967, cl. F 01N 1/12, 1969.