RU1798537C - Two-stage oil pump for hermetic compressor - Google Patents

Abstract

SUMMARY OF THE INVENTION: A rotor is mounted in a housing on a support. The first stage of the pump is formed by working bodies located on the rotor. The second stage is formed by a radial channel made in the body of the rotor. The input of the first stage is in communication with the input channels in the support, the output bypass channel in the body of the support and the longitudinal channel of the rotor with the input of the radial channel. The output of this channel is communicated with the output of the pump. The working bodies of the first stage are made from the side of the support in the form of centrifugal impellers. The longitudinal channel is made along the axis of the rotor. The rotor is mounted in the housing at the exit end of the radial channel to form a pressure chamber. Radial channels are star-shaped. 1 C.p. f-ls, 4 ill.

Description

ate with

The invention relates to the field of refrigeration and relates to the improvement of the lubrication system of hermetic compressors.

An object of the invention is to increase pump productivity.

In FIG. 1 shows a hermetic compressor; in FIG. 2 - oil pump; in FIG. 3 - size AA in FIG. 2; in FIG. 4 is a section bB in FIG. 2.

The hermetic refrigeration compressor 1 has an electric motor consisting of a stator 2 and a rotor 3, and is located inside the hermetic casing 4 with a welded pipe 5. The vertical crankshaft 6 is connected with radially arranged pistons 7.

On the cylinders 8, valve plates 9 with channels for the passage of steam are installed, and the cylinders and casings 10 are mounted on the supporting body 11. The lower part of the casing serves as an oil bath 12. Pump (Fig. 2, 3, 4)

consists of a housing 13, in the chamber 14 of which a rotor 15 is installed.

The upper part of the rotor supports the crankshaft 16 and is connected to it by means of a pin 17, and through its channel 18 the rotor communicates with the axial hole 19 of the shaft. In the middle part of the rotor, there are radial channels 20 in communication with the vertical central hole 21.

The lower part of the rotor is an internal cavity 22 with blades (ribs) 23 radially located therein, with which the rotor rests on a thin thrust plate 24 and a support 25.

Between the forming circles of the ribs 26 and 27 and the lateral surfaces of the inner cavity of the rotor, there are respectively suction and discharge zones 28 of the first pump stage. An adjacent horseshoe-shaped channel 30 is made in the heel and support, and the support bypass channel 31 connects the discharge zone

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the first stage 29 with a Central hole 21 of the rotor. Channel 30 communicates with the suction zone 28.

The compressor and pump operate as follows.

When voltage is applied to the stator 2, the rotor 3 of the electric motor and the crankshaft 6 of the compressor 1 are rotated, which is converted into the translational movement of the pistons 7. When the pistons move to the shaft, a vacuum is created through the channel for the passage of the valve plates 9, the cavity formed by the casing 10. the stator 2 and the rotor 3 of the electric motor, and the pipe 5 is the absorption of a mixture of vapor refrigerant.

In the casing 4 of the compressor, the oil droplets are separated, forming in the lower part an oil bath 12 into which the oil pump is immersed. Then the shaft rotates the rotor 15 through the pin 17. The oil located between the rotor blades 23 is sucked into the zone by centrifugal forces. injection 29 of the first stage, then through the adjacent hole in the heel-24 through the bypass channel 31 of the support .25 enters through the adjacent hole in the heel in the central. hole 21 of the rotor. The continuous flow of oil into the suction zone 28 from the oil bath 12 is carried out through the channel 30. In this way, the first stage of the pump is operated. Then, from the central hole 21, oil enters the radial channels 20, from where it is ejected by centrifugal forces

the discharge chamber 14 and further along the rotor channel 18 and the shaft bore 19 is supplied to lubricate friction pairs.,:

The economic effect of the implementation of the invention is achieved by increasing the reliability and durability of the friction compressor pairs.

Claims (2)

1. A two-stage oil pump for a hermetic compressor, comprising a housing with a support, a rotor mounted in a housing on a support, a first stage of the pump formed by working bodies located on the rotor, and a second stage formed by at least one radial channel made in the body rotor, while the input of the first stage is in communication with the input channels in the support, and the output through the bypass channel in the body of the support and the longitudinal channel of the rotor is with the input of the radial channel, while the output of the radial channel is communicated with the output of the pump, therefore, in order to increase pump productivity, the working bodies of the first stage are made from the side of the support in the form of centrifugal impellers, the longitudinal channel is made along the axis of the rotor, and the rotor is installed in the housing with exit side of the radial channel to form a pressure chamber. 2. The pump according to claim 1, characterized in that it is provided with additional radial channels located star-shaped.