RU2382905C2 - Two-rotor vacuum pump - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: invention relates to vacuum pumps used in milking apparatuses. Proposed pump comprises two shaped rotors with pressure openings, housing with side covers, suction opening, two hollow collectors with exhaust slit-like holes arranged inside every rotor, and synchronisation mechanism representing two pairs of gear wheels. Said rotary collectors are furnished with position retainers to adjust compression degree. Aforesaid slits are arranged at an angle to horizontal plane.

EFFECT: increased time of gas feed, reduced power losses and control over internal compression.

3 dwg

Description

The invention relates to vacuum installations used in milking units.

A two-rotor rotary compressor is known (see FR 1426541 A, 04/15/1966), in which compressed gas is displaced through a window made in the cavity of a driven rotor rotating around a fixed tubular axis. This rotary compressor, in principle, can operate in a vacuum mode, however, it has significant energy losses in the discharge window due to the limitation of its area.

A known two-rotor vacuum pump containing two profiled rotors with discharge windows, a housing with side covers, a suction window, two hollow manifolds with exhaust holes in the form of slots installed inside each rotor, a synchronization mechanism in the form of a pair of gears (see RU 2005102528 A, 07/10/2006). The disadvantage of this compressor is the energy loss in the discharge window due to the limitation of its area and the inability to control the degree of internal compression.

The objective of the invention is to increase the time of gas injection, reduce energy loss during injection and to ensure the regulation of the degree of internal compression.

To solve the problem in a two-rotor vacuum pump containing two profiled rotors with discharge windows, a housing with side covers, a suction window, two hollow manifolds with exhaust holes in the form of slots installed inside each rotor, a synchronization mechanism in the form of a pair of gears, according to the invention , the collectors are rotary with position locks to control the degree of compression, and the slots on the collectors are located at an angle to the horizontal plane.

The invention is illustrated by drawings.

Figure 1 shows a two-rotor vacuum pump.

Figure 2 - exhaust manifold.

Figure 3 - synchronization mechanism.

The double-rotor vacuum pump consists (Fig. 1) of two rotors 1 and 2 with a cycloidal profile, the protrusion made of an epicycloid, and the cavity of a hypocycloid, body 3 with side covers, suction 4 and discharge windows 5, two hollow manifolds 6 and 7 with exhaust holes in the form of a slot 8 with an opening 9 for fixing the position of the collector. The hollow collector has an exhaust hole in the form of a slot (figure 2). The drive is carried out from the electric motor through a synchronization mechanism, consisting of two gears 10 and 11 (figure 3).

The principle of operation of the pump is as follows.

When the rotors 1 and 2 rotate in the indicated direction in the suction cavity “B”, the volume expands, as a result of which a fresh portion of gas is sucked in. With further rotation of the rotors 1 and 2, the gas located in the cavity enters the discharge cavity “H”, where, as a result of a decrease in volume, internal compression occurs when the discharge window 5 is closed by a cylindrical surface of the hollow manifold 6 or 7. When the rotors are rotated 1 and 2, the discharge window 5 is aligned with the exhaust outlet of the hollow manifold 6 or 7. In this position, the compressed gas from the discharge cavity enters the manifold. The pumping process takes place alternately when the rotors are rotated through an angle of 90 °. The degree of internal compression and the time of gas injection will depend on the angle of inclination and dimensions of the exhaust outlet of the collector. With an increase in the angle of inclination of the exhaust opening, the gas injection time increases and, consequently, the gas velocity and the discharge energy loss decrease. To regulate the degree of internal compression, the hollow collector is rotatable and equipped with a position lock.

Claims (1)

Two-rotor vacuum pump containing two profiled rotors with discharge windows, a housing with side covers, a suction window, two hollow manifolds with exhaust holes in the form of slots installed inside each rotor, a synchronization mechanism in the form of a pair of gears, characterized in that the collectors are rotary with position locks to control the degree of compression, and the slots on the manifolds are located at an angle to the horizontal plane.

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