RU1788331C - Compressor cooling unit - Google Patents

Abstract

Application: in compressor engineering, in particular to the construction of refrigeration compressors and compressor units. SUMMARY OF THE INVENTION: lubricating bearings and a pair of gears without using an oil pump or ejector. 1 s.p. f-ly, 2 ill.

Description

The invention relates to compressor construction and relates to the construction of refrigeration compressors and compressor units.

Refrigeration compressor units are known in which the lubrication is carried out by means of an ejection device supplying oil to the system from an oil tank, the ejector itself is a dispenser.

Compressors are also known, consisting of a housing, a working chamber, a motor casing, suction and discharge cavities, selected as a prototype, in which the lubrication is carried out by pump supplying oil from the oil bath located in the compressor quarry to the rubbing parts .

The disadvantage of these compressors is the design complexity: the presence of an oil bath in the crankcase and an oil pump or ejector for oil supply, as well as insufficient lubrication of the rubbing surfaces.

The aim of the invention is to simplify the design of refrigeration compressor units, increasing reliability by improving compressor lubrication.

This goal is achieved in that in the refrigeration compressor unit comprising a casing with front, rear and intermediate end caps, a drive motor, the shaft of which is mounted in bearings located respectively in the intermediate and rear end caps, and a compressor unit located between the front and intermediate covers wherein the compressor unit includes a housing and a hollow rotor placed therein with the formation of suction and discharge cavities, mounted by means of a rolling bearing on an eccentric The shaft side, rigidly connected to the motor shaft, as well as the synchronizing gear fixed in the rotor cavity, and the stationary gear located on the front end cover with the possibility of engagement with the synchronizing gear, an overflow channel is made on the inner surface of the front end cover, which communicates the suction cavity with cavity formed

WITH

: VJ 00 00 WITH

with

A synchronizing gear, a rotor bearing and an electric motor shaft bearing located in the intermediate cover, as well as a refrigeration compressor unit can be equipped with an additional compressor unit mounted on the back cover side.

In FIG. 1 shows a refrigeration compressor unit with one compressor unit; figure 2 - unit with an additional compressor unit.

The refrigeration compressor unit comprises a casing 1 (Fig. 1) with front 2, intermediate 3 and rear 4 end caps, an electric motor 5 located between the caps 3 and 4, the rotor of which is mounted on a shaft b having rolling bearings 7 in the caps 3 and 4, and a compressor unit located between the front and intermediate covers, including a housing 8, the inner surface of which is made in the form of an epitrochoid and a rotor 9, in the inner cavity of which there is a rolling bearing 10 mounted on an eccentric rigidly connected to the shaft 6 and hroniziruyuscha gear 11 finds a conductive meshed with the fixed gear 12 located in the front cover 2 and the housing 8, the rotor 9 and the end caps 2 and 3 form a suction cavity 13 and pumping 14.

For the passage of the additional flow of the mixture of refrigerant with oil and lubrication of the bearing 10, gears 11, 12 and bearing 7 located in the intermediate cover 3, an overflow channel 15 is provided on the inner side of the front cover 2. This channel communicates the suction cavity 13 with a cavity formed by a synchronizing gear 11, bearings 7 and 10.

. The oil-refrigerant mixture enters the compressor through the inlet with the filter 16. To pass the oil-oil mixture in the back cover 4, holes 17 are made. And in the intermediate cover 3 there is a hole 18.

Due to the discharge created in the expanding cavity of the housing 8, the palm-oil mixture containing 1-5% of the oil comes from the evaporator (not shown in Fig. 1) through the filter 16 to the compressor.

Then, the oil-refrigerant mixture is sucked out through the rolling bearing 7 located in the rear cover 4, the holes in the rear cover 17, the gap between the stator and the rotor of the electric motor, the hole 18 in

lid 3 into the suction cavity. This lubricates this bearing 7 and the friction parts of the rotating rotor 9. The lubrication of the rolling bearing 10, bearing 7 located in the cover 3 and a pair of gears 11,12 is carried out as part of the flow of oil-cold mixture entering the suction cavity through the bypass channel 15. made on the inner surface of the cover 2.

In the case of installing an additional compressor unit (Fig. 2), the oil-cold mixture entering through the inlet with the filter 16 enters the cavity of the casing 1 and then, as described in Figs. 1.

The use of the invention in comparison with the prototype allows the lubrication of bearings and a pair of gears without the use of an oil pump or ejector, i.e. The design of the refrigeration compressor unit is simpler and more reliable.

Claims (2)

SUMMARY OF THE INVENTION A refrigeration compressor unit comprising a casing with front, rear and intermediate end caps, a drive motor whose shaft is mounted in bearings housed in the intermediate and rear end caps, respectively, and a compressor unit located between the front and intermediate covers, wherein the compressor block includes a housing and a hollow rotor mounted therein with the formation of suction and discharge cavities, mounted by means of a rolling bearing on an eccentric shaft y, rigidly connected to the motor shaft, as well as a synchronizing gear fixed in the rotor cavity, and a fixed gear located on the front end cover with the possibility of engagement with the synchronizing gear, is also distinguished in order to simplify the design and increase reliability by improving compressor lubrication; an overflow channel is provided on the inner surface of the front end cover. Communicating a suction cavity with a cavity formed by a synchronizing gear, a rotor bearing and an electric motor shaft bearing located in the intermediate cover. 2. The assembly according to claim 1, characterized in that it is provided with an additional compressor unit mounted on the back cover side. FIG. 2.