US2630964A - Compressor mounting - Google Patents

Compressor mounting Download PDF

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Publication number
US2630964A
US2630964A US13288149A US2630964A US 2630964 A US2630964 A US 2630964A US 13288149 A US13288149 A US 13288149A US 2630964 A US2630964 A US 2630964A
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US
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Grant
Patent type
Prior art keywords
compressor
casing
rotor
frame
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Inventor
Owen H Scheldorf
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General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12Casings; Cylinders; Cylinders heads; Fluid connections
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00Pumps
    • Y10S417/902Hermetically sealed motor pump unit
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/49009Dynamoelectric machine
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49316Impeller making
    • Y10T29/4932Turbomachine making
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining
    • Y10T29/49908Joining by deforming
    • Y10T29/49938Radially expanding part in cavity, aperture, or hollow body
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining
    • Y10T29/49947Assembling or joining by applying separate fastener
    • Y10T29/49954Fastener deformed after application

Description

March 10, 1953 o. H. SCHELDORF COMPRESSOR MOUNTING Filed Dec. 14, 1949 =7 In ve nbor Owen H. Schel His Attorne Patented Mar. 10, 1953 COMPRESSOR MOUNTING Owen H. Schel'dorf, North East, 2a., assignor to General Electric Company, a corporation of New York.

Application December 14, 1949, Serial No. 132,881

7' Claims. 1

My invention relates to motor-compressor assemblies and more particularly to arrangements for mounting such assemblies Within an enclosing casing.

It is an object of my invention to provide a motor-compressor assembly including an improved arrangement for maintaining a uniform air gap between the stator and the rotor of the motor.

Further objects and advantages of my invention will become apparent as the following description proceeds and the features of novelty which characterize my invention will be pointed out with particularity in the claims annexed to and forming part of this specification.

For a better understanding of my invention reference may be had to the accompanying drawing in which Fig. 1 is an endelevation view partly in section of a motor-ccmpressor assembly embodying my invention; Fig. 2- is a side elevation view taken along the line 22 in Fig. 1-; Fig, 3 is an enlarged view showing a detail of my invention; Fig. 4 shows the construction of Fig. 3 in another stage of the assembly; and Fig. 5i1lustrates a modified form of my invention.

In carrying out the objects of my invention a rotor-compressor assembly is positioned within an enclosing casing with the rotor in proper spaced relationship to the stator. The enclosing casing and the frame of the compressor are shaped to receive spaced elements which areforced into grooves in the casing and theframeto fix the rotor-compressor assembly in position.

Referring to Figs. 1 and 2 there is shown anenclosing casing or housing I of hollow cylindrical shape. Within the casing is arranged a motor-compressor unit including a motor 2 and a compressor 3. For purposes of illustration an enclosed motor-compressor unit for use as refrigerating apparatus is illustrated, but motor-compressor units employed for other purposes may equally well be constructed in accordance with. my invention. In the form illustrated the ends of the casing I are closed by end plates, one such end plate being shown at A. Compressed refrigerant is discharged from the compressor 3 through an exhaust muffler 5- and a conduit 6 to the condenser (not shown) of the refrigerating system and vaporized refrigerant is returned from the evaporator (not shown) to the interior of the. casing I through the conduit I. This vaporized refrigerant passes from the casing through an intake muffler 8 to the compressor.

The motor 2 includes a stator 9 and a rotor I0 mounted to rotate within the stator. The stator 9 includes a laminated core structure it and windings ltdisposed within slots in the. core structure. The stator is secured in fixed position. within the casing I.

The compressor 3 includes a frame 1'3 which is shaped to provide a boss I4 having an. opening; therein providing a. bearing surface for the. drive shaft I5 which connects the rotor and the. stator. The rotor is supported entirely by the frame of the compressor through the shaft I5, forming av rotor-compressor assembly.

In order to position this rotor-compressor assembly longitudinally within the casing, the casing is shaped to provide a shoulder [-6. The shoulder I6 may be formed in any suitable manher, for example, by rolling a recess in the wall. of the casing to force the wall inwardly at the. shoulder [6. The frame [3. of the compressor includes a portion I!v which is arranged to abut. the shoulder I6 affording a positive longitudinal positioning for the rotor-compressor assembly.

For satisfactory low noise operation it is necessary that a uniform gap between the rotor and the. stator be maintained throughout the periphery of the rotor. By my invention the rotorcompressor assembly is easily and positively mountedso that thisuniform air-gap is provided. The. casing I is provided along its. interior surface. with. an annular groove. I8 which is spaced longitudinally from the shoulder I6; As is, most. clearly illustrated. in Figs. 3' and 4, the, frame por-. tion I! is similarly provided with an annular groove I9. The groove I19 is formed so that in the assembled position of the compressor, the grooves I8 and I9 are in aligned relationship. During the assembly operation the rotor-com pressor assembly and the casing, are held in. anysuitable fixture for temporarily maintainin the proper uniform air gap between the rotor and the stator. In order to fix the parts permanently in this position a plurality of tubular elements or keys 20.- are inserted between the. frame. portion I7 and the casing I at intervals about the circumference. In the; form. illustrated four such keys are used, the keys being equally spaced at intervals about the casing; The frame portion I 'I- is shaped. to provide a. recess N for receiving the. keys 20.. With the keys disposed at proper intervals a force is. applied to each of the keys by a pressing tool 22. This force squeezes. and flattens. the. keys 2.0; into. the. laterally elongated flattened shape shownv in Fig. 4. As: the: keys are flattened the sides of the keys are forced into the grooves l8 and I9 forming a support for the rotor-compressor assembly and radially positioning aceaeca this assembly so that the uniform air gap temporarily maintained by the fixture is permanently fixed.

It can be seen that the construction described above compensates for slight variations which may occur in manufacturing and further that the need for carefully machined surfaces is minimized since the periphery 23 of the frame portion I1 is spaced by the keys 20 from the inner wall of the casing.

In Fig. 5 there is illustrated a modified form of my invention which differs from that described above only in that each of the keys 24 is of hollow triangular cross section. One side of the triangular key 24 is disposed against a fiat face 25 of the frame portion and a force is exerted against an apex 26 of the key by the pressing tool 22. The force exerted by the tool 22 flattens the key 23 into substantially the shape shown in Fig. 4, forcing the key laterally into the grooves l8 and H3 in the manner described above.

While I have shown and described specific embodiments of my invention as applied to an en closed refrigerating motor-compressor unit, other applications will occur to those skilled in the art, and I intend to cover by the appended claims all modifications within the spirit and scope of my invention.

What I claim as new and desire to secure by Letters Patent of the United States is:

1. A motor-compressor assembly comprising a casing having a shoulder on the interior surface thereof, said casing having an annular groove therein spaced from said shoulder, a motor-cornpressor unit having a frame portion abutting said shoulder, said frame having an annular groove therein concentric with said first-mentioned groove, and a plurality of elements each engaging both of said grooves and having a pressed fit therewith to hold said motor-compressor unit in fixed position with said casing.

2. A motor-compressor assembly comprising a. casing having a shoulder on the interior surface thereof, said casing having an annular groove therein spaced from said shoulder, a motor-compressor unit having a frame portion abutting said shoulder, said frame having an annular groove therein concentric with said first-mentioned groove, and a plurality of flattened hollow elements each engaging both of said grooves to hold said motor-compressor unit in fixed position with said casing.

3. A motor-compressor assembly comprising a hollow cylindrical casing having a shoulder on the interior surface thereof, said casing having an annular groove therein spaced from said shoulder, a motor-compressor unit having a frame portion abutting said shoulder, said frame having an annular groove therein concentric with said first-mentioned groove and a plurality of flattened hollow elements equally spaced about the internal periphery of said casing, each of said elements engaging both of said grooves to hold said motor-compressor unit in fixed position within said casing.

4. A motor-compressor assembly comprising a casing having a shoulder on the interior surface thereof, a stator mounted Within said casing, a rotor-compressor assembly including a frame portion arranged within said casing, said frame portion abutting said shoulder, and means for maintaining a uniform air gap between the rotor and said stator, said means comprising an annular groove in said casing spaced from said shoulder, an annular groove in said frame portion concentric with said first-mentioned groove, and a plurality of flattened hollow elements engaging both of said grooves.

5. In a motor-compressor assembly comprising casing having a stator and a rotor-compressor unit mounted therein, the compressor of said rotor-compressor unit including a frame portion, the method of positioning the rotor within said stator with a uniform air gap which comprises providing said casing with an internal shoulder, forming an annular groove in said casing spaced from said shoulder, forming a complementary groove in said frame portion of said compressor, holding said rotor in properly spaced relationship with said stator, placing a plurality of nollow elements in spaced relationship between said frame portion and said casing, and exerting a force on said elements to flatten said elements and to force said elements into engagement with both of said grooves.

6. In a motor-compressor assembly comprising a casing having a stator and a rotor-compressor unit mounted therein, the compressor of said rotor-compressor unit including a frame portion, the method of positioning the rotor within said stator with a uniform air gap which comprises providing said casing with an internal shoulder, forming an annular groove in said casing spaced from said shoulder, forming a complementary groove in said frame portion of said compressor, holding said rotor in properly spaced relationship with said stator, placing a plurality of hollow tubular elements in spaced relationship between said frame portion and said casing, and exerting a force on said elements to flatten said elements and to force said elements into engagement with both of said grooves.

'7. In a motor-compressor assembly comprising a casing having a stator and a rotor-compressor unit mounted therein, the compressor of said rotor-compressor unit including a frame portion, the method of positioning the rotor within said stator with a uniform air gap which comprises providing said casing with an internal shoulder, forming an annular groove in said casing spaced from said shoulder, forming a complementary groove in said frame portion of said compressor, holding said rotor in properly spaced relationship with said stator, placing a plurality of hollow elements of triangular cross section in spaced relationship between said frame portion and said casing, and exerting a force on said elements to flatten said elements and to force said elements into engagement with both of said grooves.

OWEN H. SCHELDORF.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,971,723 QDell Aug. 28, 1934 1,991,723 Betz Feb. 19, 1935 2,001,492 Herlinger May 14, 1935 2,062,045 Van Deventer Nov. 24, 1936 2,246,272 Davidson June 17, 1941 2,279,932 Von Henke Apr. 14, 1942 2,415,905 Overton Feb. 18, 1947

US2630964A 1949-12-14 1949-12-14 Compressor mounting Expired - Lifetime US2630964A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2905124A (en) * 1955-09-26 1959-09-22 Continental Can Co Method of attaching a bail ear
US3168775A (en) * 1964-06-17 1965-02-09 Walter A Churchill Method of securing an electrical heater to a heat exchanger
US3701197A (en) * 1970-05-14 1972-10-31 Fichtel & Sachs Ag Method of providing a partition wall in the cylinder of a telescopic suspension unit
US3724064A (en) * 1970-07-02 1973-04-03 Mott Metallurg Corp Sealing method
US3744123A (en) * 1970-05-14 1973-07-10 Fichtel & Sachs Ag Method of assembling a resilient tube with a rigid body
US4249298A (en) * 1978-03-27 1981-02-10 Hitachi, Ltd. Method for connecting two members
US4846635A (en) * 1988-01-25 1989-07-11 Tecumseh Products Company Hermetic compressor mounting pin
WO1993021440A1 (en) * 1992-04-13 1993-10-28 Copeland Corporation Compressor assembly with staked shell
US20070261238A1 (en) * 2006-05-11 2007-11-15 Mitsubishi Electric Corporation Compressor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1971723A (en) * 1934-02-10 1934-08-28 Robert J O'dell Method of securing automobile top coverings
US1991723A (en) * 1933-06-05 1935-02-19 Fafnir Bearing Co Bearing seal
US2001492A (en) * 1933-05-16 1935-05-14 Gen Electric Method of assembling packing rings in turbine rotors
US2062045A (en) * 1926-10-12 1936-11-24 Gen Motors Corp Motor operated machine unit
US2246272A (en) * 1940-08-04 1941-06-17 Davidson William Ward Rotary pump
US2279932A (en) * 1939-12-16 1942-04-14 American Electric Fusion Corp Method of installing cooling devices in welding electrodes
US2415905A (en) * 1944-01-28 1947-02-18 Charles M Overton Metal lock

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2062045A (en) * 1926-10-12 1936-11-24 Gen Motors Corp Motor operated machine unit
US2001492A (en) * 1933-05-16 1935-05-14 Gen Electric Method of assembling packing rings in turbine rotors
US1991723A (en) * 1933-06-05 1935-02-19 Fafnir Bearing Co Bearing seal
US1971723A (en) * 1934-02-10 1934-08-28 Robert J O'dell Method of securing automobile top coverings
US2279932A (en) * 1939-12-16 1942-04-14 American Electric Fusion Corp Method of installing cooling devices in welding electrodes
US2246272A (en) * 1940-08-04 1941-06-17 Davidson William Ward Rotary pump
US2415905A (en) * 1944-01-28 1947-02-18 Charles M Overton Metal lock

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2905124A (en) * 1955-09-26 1959-09-22 Continental Can Co Method of attaching a bail ear
US3168775A (en) * 1964-06-17 1965-02-09 Walter A Churchill Method of securing an electrical heater to a heat exchanger
US3701197A (en) * 1970-05-14 1972-10-31 Fichtel & Sachs Ag Method of providing a partition wall in the cylinder of a telescopic suspension unit
US3744123A (en) * 1970-05-14 1973-07-10 Fichtel & Sachs Ag Method of assembling a resilient tube with a rigid body
US3724064A (en) * 1970-07-02 1973-04-03 Mott Metallurg Corp Sealing method
US4249298A (en) * 1978-03-27 1981-02-10 Hitachi, Ltd. Method for connecting two members
US4846635A (en) * 1988-01-25 1989-07-11 Tecumseh Products Company Hermetic compressor mounting pin
WO1993021440A1 (en) * 1992-04-13 1993-10-28 Copeland Corporation Compressor assembly with staked shell
US5267844A (en) * 1992-04-13 1993-12-07 Copeland Corporation Compressor assembly with staked shell
US20070261238A1 (en) * 2006-05-11 2007-11-15 Mitsubishi Electric Corporation Compressor
US7722339B2 (en) * 2006-05-11 2010-05-25 Mitsubishi Electric Corporation Compressor including attached compressor container

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