RU1775009C - Positive-displacement rotor machine - Google Patents

Abstract

SUMMARY OF THE INVENTION: Three profiled rotors are placed in the housing with the formation of working chambers, the axes of rotation of which in cross section coincide with the centers of gravity and are located on intersecting sub-angle of 120 & straight lines passing through the centers of rotation of the rotor. The profile of each rotor is made in the form of a convex equilateral triangle. The sides of the rotors are described by equal circular arcs with centers of curvature located at the vertices of triangle 3 il, corresponding to opposite sides.

Description

The invention relates to mechanical engineering, in particular to the design of rotors of volumetric rotary machines.

The rotor is one of the main components of volumetric rotary machines. Known designs of volumetric rotary machines have common disadvantages, such as low specific productivity, high inertial loads, design complexity. In addition, disadvantages of rotary machines include such as pressure pulsations and gas flowing from the working cavity through the gaps between the rotors and the machine body, which leads to a decrease in productivity.

A common disadvantage of rotary machines is the inability to develop high pressure in the discharge chamber. The indicated drawback of rotary machines is absent in piston machines.

However, existing piston machines have unsatisfactory weight and dimensions, large friction power losses, as a result of which their efficiency decreases with increasing speed.

An object of the invention is to provide a positive displacement rotary supercharger combining the advantages of reciprocating machines, those. creating high pressure and productivity.

This goal is achieved by the fact that in the known volumetric rotary machine comprising a housing, several interacting rotors forming a working chamber with the housing, which according to the invention is formed by three rotors, the axis of rotation of which pass through their centers of gravity and are located at an angle of 120 ° the profile of the rotors has the shape of a convex equilateral triangle, the sides of which are circular arcs with centers of curvature located at the corresponding vertices of the triangle. When the rotors rotate in the same direction around its axis by an angle a closed volume is formed - working chamber, whose dimensions vary from 0 to 3R2H (3 -)

t

With uniform synchronous rotation of the rotors in one direction, the volume of the working chamber periodically changes

H xi

ate

similar to what happens in a reciprocating compressor.

Thus, the inventive rotor machine meets the criterion of Novelty.

Comparison of the claimed solution with the corresponding technical solutions in the given technical field made it possible to reveal G features that distinguish the claimed solution from the existing ones, which allows us to conclude that the criterion Essential was distinguished.

Fig. 1 shows a horn when the tops of the rotors are at one point; in Fig. 2, the rotors are rotated in one direction around their axes by an angle (p in Fig. 3 is a schematic diagram of the operation of a volumetric rotary supercharger.

The volumetric rotor machine consists of a rotor 1, a working chamber 2, formed by three rotors, the axis of rotation of which pass through the center of gravity of each rotor and located at an angle of 120 °, radial channels 3, end cover 4, in which there is a hole 5 closed valve (not shown), end cavities 6.

Volumetric rotary machine operates as follows.

When the rotors 1 rotate in the same direction around their axes at an angle (see Fig. 2), a closed volume forms between the rotors, the working chamber 2, the dimensions of which vary from 0 to 3R N (3), where

R is the radius of the circle passing through the centers of gravity of the rotors (see Fig. 1);

H is the height of the rotor.

With an increase in the volume of the working chamber 2, air from the end cavities 6 of the rotor 1 through the radial channels 3 rushes into the working chamber 2 until the size of the chamber reaches its maximum

3R N values (3 tg} - Subsequently

As the rotors rotate, the conjugate vertices of the rotors cut off the radial channels 3 and the air in the working chamber 2 begins to compress. When the camera reaches the set

the pressure valve opens the hole 5 in the end cap 4 and air is pumped into the desired volume. For one revolution of the rotor, three pressure cycles occur. Rotors driven by gear transmission

providing their synchronous angular rotation.

The manufacture of rotors having the shape of a convex equilateral triangle, the sides of which are circular arcs with centers of curvature located at the corresponding vertices of the triangle, is simply technological.

In addition, the working chamber of the proposed volumetric rotary machine is created

the tops and sides of three rotors rotating in the same direction and having the same shape. This makes it possible to compress gas (air) to the required, sufficiently high pressures, as in reciprocating machines, with a large frequency in the absence of reciprocating movement of the parts.

Claims (1)

SUMMARY OF THE INVENTION A volumetric rotor machine comprising a housing, three profiled rotors arranged in it to form working chambers, the rotational axes of which in cross section coincide with their centers of gravity and are located on straight lines intersecting each other at an angle of 120 ° passing through the centers of rotation rotors, moreover, the profile of each rotor is made in the form of a convex equilateral triangle, distinguishing with the fact that, in order to increase the efficiency, the sides of the rotors are described by equal circular arcs with centers of curvature located with the vertices of the triangle corresponding to opposite sides. Figure 1 U and g 3 Fig.Z