US1776921A - Rotary compressor - Google Patents

Description

p 30, 1930. A. MOESSINGER 1,776,921

' ROTARY COMPRESSOR Filed June 17, '1927 BY I G O MJM ATTD RN EYS 35' mounted on a shaft e supported in bearmamuonssmena, or 'wm'rna'rnnn,

the compressor casing and a 'member disposed within it.

Patented sep ao; 193a UNITED T T S swnzmtm," Assmnon. we "ran rm BULZER. rnnnns socnrrn .enomn, or wmrnarnunswnzmnm1 noun: conrnnsson Application glee June 17, 1927, Serial in. 199,444, and m sme ma 1111 ma This invention relates to rotary-compressors of the kind in which the compression, is

effected by means of the relative movement of According to the present invention the lateral walls of the workin space in a rotary compressor of the kind escribed are inthe form of rotating discs, the circumferential edges of which slide in an air tight manner on the inner surface of the compressor casing. Each disc may be disposed within a chamber supplied withv lubricating medium. under pressure from the delivery'side of the comressor, and preferably one ofthese chamrs is connected b means of channels or ducts to the slots or the reception of the rotor vanes so that the slots. are also supplied with lubricating medium under ressure.

The rotor and the discs may be ree to move axially on the shaft, so that irrespective of any forces acting on the shaft they-can adjust themselves automatically thereon.

The invention may be carried out in varlous ways but one construction accor g thereto is illustrated by way of example in I the accompanying drawing in which Figure 1 is a sectional elevation on the line 1-1 of-Figure 2, and

Figure 2 is a cross-section on .the line IIII of Figure 1.

In the construction illustrated in the drawing the compressor comprises a casing a hav ing within it a suction chamber 6, working space a and delivery chamber d, and a' rotor nally by the rotor IL, externally by thecylindrical' liner Land laterallyby discs The inletports-iand outlet ports .7rz' are formed in the liner Z. .The casing is; hermetically sealed atone end by the cover 0 provided with a glass inspection window 'n and at the opposite endby the end cover 9 into which is The lateral walls of the working chamber are not, as hitherto, a fixed or rigid part of displacement under a variations in the pressure the compressor housing but comprise rotatable discs m. These are loosely keyed to the rotor shaft e by means of a key or'feather r in such a manner as to permit their axial movement along'therotor' shaft and theircircumferentialedgesare adapted to'slide in an air tight manner on theinner surface of thecylindricallin'er." In this way the clear chamber a: connected to the delivery chamber of the compressor, in which lubricant col lects, by means of on ipe 8. Thus each disc is forced against the iner Z by means of oil ressure equal to the delivery res-- sure of t e compresstonso that in addition to good lubrication of the slidin surfaces of the discs, a perfect sealing is o tained.

Further the bearings f and the stuffing box p are efliciently lubricated and the sealing of the working space from the atmosphere is also improved as the gaseous medium is unable to reach an of the joints.

A portion oft e lubricant forced into the left handchamber a: flows through a channel or duct tin the shaft e. and rotor h to the slots which contain the vanes g, which it seals and lubricates.. Further, the lubricantwhich- 4 flows over into the working space is forced.

back again into the delivery chamber (1 to-' gether with the compressed working medium. The thrust produced by the pressure of the lubricant on the unbalanced end face of :the shaft e is taken up or absorbed by the left hand ball bearing 7 which is also designed as a thrust bearing. .The discs) together with the rotor h are axiall movable on the shaft, so that they can ad ust themselves automatically with respect to the c lindrical casing, which is sprung or hel be-- tween distance pieces u, o and w, inde end'ently of anyaxial movement of the sha due-to of the lubricating and sealing medium.

-I claim: -1. In a rotary com of a casing, a liner essor, the combination stationary in said casing and forming a c lindrical chamber therein, a rotor mounte to rotate in said chamber, and discs positively mounted to rotate with said rotor and sliding on the end edges of said stationary liner said rotor and discs being free to'move axially with respect to said liner.

2. In a rotary compressor, the combination of a casing, a liner in said casing forming a cylindrical chamber therein, a shaft extending through said chamber, a rotor mounted on said shaft to rotate in said chamber, and discs mounted on said shaft so as to be positively rotated thereby and slidin on the end ed es of said liner, said rotor an discs being axially movable on said shaft, whereby they can automatically align themselves with respect to said liner. 7

3. In a rotary compressor, the combination of a casin a liner in said casing forming a cylindrica chamber therein, a rotor mounted to'rotate in said chamber, discs mounted on said shaft so as to be positively rotated thereby and slidin on the end edges of said liner, said rotor an discs being free to movaaxially with respect to said liner, and means for supplyin lubricant under the delivery pressure of t e compressor to the outer ace of each of said discs, whereby said discs are yieldingly pressed against the end edges of said liner by the pressure of said lubricant.

4. In a rotary compressor, the combination of a casing, shaft bearings in said casing, a I

cylindrical liner disposed in said casing concentric with said bearings, and forming a cylindrical chamber eccentric thereto, a shaft mounted in said bearings, a rotor mounted on said shaft to rotate in said chamber, and discs mounted on said shaft so as to be positively rotated thereby and sliding on the end edges of said liner, said rotor and discs being axially movable on said shaft, whereby they can automatically align themselves with respect to said liner.

5. In a rotaryco'mpressor, the combination of a casing, a shaft rotatably mounted in said casing, a liner disposed in said. casing and form a cylindrical chamber therein, a rotor having a plurality of vanes mounted on said shaft to rotate in said chamber, said shaft having axial and radial passages therein adaptedto connect theinner faces of said concentric with said shaft and forming a cylindrical chamber eccentric thereto, a rotor ing lubricant from said reservoir to the outer face of each of said discs, whereby said discs are yieldingly pressed against the end edges of said liner by the pressure of the li -bricant.

In testimony whereof I have aifixed my signature. a

ALBERT MOE SSINGER.

rotor vanes with a supgly. of lubricating 'medium under p mounted on said shaft so as to be positivel rotated thereby and sliding on the end of said liner, said rotor and discs bein axially movable-on said shaft, and means or suppl cant under presureto the of said discs ingly pressed against the and "edges of said liner by the pressure of said lubricant.

6. In a rotary compressor, the combination of a casing, a shaft rotatably mounted insaidcasing,alinerdisposedinsaidcasing outer ace of each 'lubriwhereby said discs are yield-

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