CA1205058A - Device for cooling motor end-turns in a compressor - Google Patents
Device for cooling motor end-turns in a compressorInfo
- Publication number
- CA1205058A CA1205058A CA000435892A CA435892A CA1205058A CA 1205058 A CA1205058 A CA 1205058A CA 000435892 A CA000435892 A CA 000435892A CA 435892 A CA435892 A CA 435892A CA 1205058 A CA1205058 A CA 1205058A
- Authority
- CA
- Canada
- Prior art keywords
- tube
- pick
- stator
- motor
- end turns
- 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
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 28
- 239000000314 lubricant Substances 0.000 claims abstract description 19
- 239000007921 spray Substances 0.000 description 4
- 230000000994 depressogenic effect Effects 0.000 description 3
- 241000901720 Stator Species 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241000155250 Iole Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Compressor (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
ABSTRACT
A cooling device for a hermetic motor-compressor unit having an outer housing with a lubricant sump in the bottom thereof, a rotatable crankshaft vertically disposed in the housing, and a motor having a stator circumferentially disposed about the rotating crank-shaft and a rotor connected to the crankshaft for rotation therewith. The cooling device comprises a pick-up tube connected to the rotating crankshaft and having one end thereof extending into the lubricant sump. The pick-up tube has an axial bore disposed therein and a radial passage means disposed therein in communication with the axial bore so that, upon rotation of the crankshaft, oil is pumped upwardly through the axial bore and a portion thereof thrown radially outwardly through the radial passage means and directly against the inner surfaces of the lower end turns of the stator without having first contacted any other parts of the motor.
A cooling device for a hermetic motor-compressor unit having an outer housing with a lubricant sump in the bottom thereof, a rotatable crankshaft vertically disposed in the housing, and a motor having a stator circumferentially disposed about the rotating crank-shaft and a rotor connected to the crankshaft for rotation therewith. The cooling device comprises a pick-up tube connected to the rotating crankshaft and having one end thereof extending into the lubricant sump. The pick-up tube has an axial bore disposed therein and a radial passage means disposed therein in communication with the axial bore so that, upon rotation of the crankshaft, oil is pumped upwardly through the axial bore and a portion thereof thrown radially outwardly through the radial passage means and directly against the inner surfaces of the lower end turns of the stator without having first contacted any other parts of the motor.
Description
S~8 A DFV~CE FOR COOLING MOTOR
END-TURNS IN A COMPRESSOR
_ This invention pertains to a cooliny device for a hermetic motor-compressor unit, and more particularly to a cooling device that radially sprays a portion of the lubricant pumped by a lubrlcant pick-up tube directly against the lower end turns of the motor stator.
One problem of major concern relating to hermetic 1~ motor-compressor units is the heat generated by its operation which decreases compressor cooling efficiency.
Various devices have been arranged within the housing of the motor-compressor unit to pump lubricant from an oil sump therein onto or against different structural members to reduce their temperatures caused by the heat generated by the units operation. An example of one such device is disclosed in U.S. Patent 3,6~8,337 wherein a portion of the pumped lubricant is used to cool the lower en~ ring o F the rotor and thereafter the lower end turns of the stator. In particular, oil flows ~rom the oil sump up through an oil pick-up tube into a chamber, which is formed by the inner surfaces of the rotor end ring, a radially disposed flange of the pick-up tube, and the rotating crank-~5 shaft. Passages are radially provided in the rotorend ring so that the oil within the chamber may pass therethrough and be dispersed against the stator lower end turns for the cooling thereof. However, since the lubricant must first pass through passages in the rotor end rings before contacting ~he stator lower end turns, the cooling experienced by the stator lower end turns is reduced because of the ,~, increase in temperature of the lubricant as it passes through the radial passayes removing heat energy from the rotor end ring.
A further disadvantage of the device disclosed in Patent 3,618,337 is the increase in cost resulting from the s-tructure defining the oil chamber, i.e., the rotor end ring, the radially disposed flange of the pick-up tube, and the fastener assemblies required to attach the radial flange to the rotor end ring lower surfaces, and the drilling of a plurality of radial passages in the rotor end ring.
Another prior art device similar to the above-mentioned prior art device is disclosed in U.S.
Patent 3,560,116 wherein oil is delivered by a pump into two streams, one stream being used for normal lubricating purposes associated with the parts dlsposed in the upper housing area, and a second stream for cooling the motor parts directly. The two streams of oil are created by two oil pump pic~-up tubes, an inner tube and an outer tube, wherein the outer tube pumps lubricant upwardly through the area defined between the inner and outer tube into a chamber defined by the rotor lower short-circui-ting ring, a flange radially disposed on the top portion of the outer tube, and the inner tube which extends upwardly to the rotating crankshaft. The radial flange has depressed grooves radially disposed therein and with the lower surface of the lower short-circuiting ring form radial passages for delivering a portion of the lubricant therethrough against the stator lower coil ends. Any cooling experienced by the stator lower coil ends is reduced 3~5~5a~
since the oll being sprayed thereon has absorbed heat energy from the radial flange, inner pick-up tube, and the rotor lower short-circuiting ring. As with the prior art cooling device clisclosed in the above U.S. Patent 3,618,337, the -temperature of the rotor is generally higher than the temperature of the stator, thereby further reducing any cooling effect of the oil against the stator lower coil ends.
Further, the cooling device in U.S. Patent 3,560,116 undesirably increases the cost of the compressor because of its rather complex construction requiring two coaxially disposed pick-up tubes, the radial flange disposed on the upper portion of the outer pick~up tube, and the depressed grooves disposed within the radial flange.
The cooling device of the present invention eliminates the disadvantages and problems discussed in the above prior art by providing a lubricant pick-up tube having a hole radially disposed therein.
The hole is axially located on the lubrican-t pick-up tube such that the oil thrown radially outwardly therethrough avoids contact with other motor parts during its flight to and directly against the radially inner surfaces of the stator lower end turns. Since the oil thrown radially outwardly through -the hole is pumped directly by the lubricant pick-up tube from the oil sump, that portion of the oil maintains a substantially constant temperature so as to provide maximum cooling to the stator lower end turns. Since this portion of the pumped oil does not first contact any other motor components prior to contacting the sta-tor lower end turns, the stator cooling effectuated 5~
by that portion of the pumped oil is greater than the cooliny resulting ~rom the above prior art cooliny devices.
In ~urther contras-t with the above prior art cooling devices, the cooling device of the present invention is substantially less costly to construct since it does not involve additional structural members, for e~xample, radially extending flanges from the upper portion of the pick~up tube, depressed grooves within the radial flange, or a plurality of coaxially disposed pick-up tubes.
A further advantage of the cooling device of the present invention is that it reduces the requirement for close tolerances of the stator lower end turns by throwing the oil directly on the end turns, which makes submersion of the end turns in the oil less critical in controlling motor temperatures as may be the case in some prior art compressors.
In one embodiment of the present inventionl there is provided in a hermetic motor-compressor unit a cooling device comprising a lubricant pick-up tube having one end connec-ted to a rotating crankshaft and its opposite end extending into an oil sump disposed in the housing of -the motor-compressor unit. The pick-up tube has an axial bore upwardly extending therein from i-ts opposite end and through which oil from the oil sump is pumped. The motor stator has its lower end turns extending downwardly such that their radially inner surfaces are in radially adjacent and spaced-apart relationship with the pick-up tube.
The pick-up tube further has a radial passaye means disposed therein which communicates with the axial S~8 bore and which is in direct facing relationship with the sta-tor lower end turns. ~s the lubrican-t-pick-up tube is rotated, a portion of the lubrlcant pumped upwardly through the axial bore is thrown radially outwardly through the radial passage means directly against the radially inner surfaces of the stator lower end turns prior to contacting any other portion of the motor unit.
It is an object of the present invention to provide an improved cooling device for a hermetic motor-compressor unit which transports a portion of the oil ~rom the oil sump upwardly through a lubricant pick-up tube and directly against the radially inner surfaces of the stator lower end turns prior to contacting and drawing heat from any other motor components.
Another ob~ect of the present invention is to provide an improved cooling device for the stator lower end turns in a hermetic motor-compressor unit which is inexpensive to manufacture.
The above mentioned and other features and objects of this invention, and the manner of attaining them, will become more apparent and the inven-tion itself will be better understood by reference to the description of an embodiment of the invention taken in conjunction with the drawing, which is a longi-tudinal sectional view of the lower portion of a hermetic motor-compressor unit incorporating a preferred embodiment of the present invention.
Referring to the drawing, lower portion 2 of a hermetic motor-compressor unit is illustrated com-prising a compressor outer housing ~ enclosing rotor ~Z05~
6 which is secured to crankshaft 8 to rota-te therewith, stator 10 which is secured within houslng 4, oil sump ].2 disposed in the lower por~ion of outer housin~ 4, and cooling device 14 of the present in~ention.
Crankshaft 8 i5 conventionally mounted within motor compressor unit 2 and has axially disposed therein a plurality of passages 16, 18 and 20 for delivering oil to the upper components of motor compressor unit 2. The portion of oil delivered upwardly through passages 16, 18 and 20 generally returns to oil sump 12 by gravitational means.
RotGr 6 has rotor end rings 22, and stator 10 has stator motor end turns 24 ~xtending downwardly in outer housing 4 so that the lower end portions of end turns 24 may be disposed below oil level 26 in oil sump 12.
Cooling device 14 comprises pickup tube 28, which has a generally cylindrical midportion 30 a lower conical portion 32 ~oined to midportion 30 and an upper portion 34 disposed within passage 16 of crankshaft 8. As illustrated, pickup tube 28 has axial bore 36 disposed therein and which communicates with passage 16 of crankshaft 4. The lower end of axial bore 36 defines opening 38 in conical portion 32, which is disposed below oil level 26.
Radially disposed within pickup tube 28 is hole 40 through which a portion of the pumped lubricant is thrown radially outwardly. Important to cooling device 14 is the axial location of hole 40 in pickup tube 28. ~Iole 40 is disposed within pickup tube 28 so that it is directly opposite the radially inner surfaces 42 of stator end turns 24 and below lower s~
surfaces 44 of rotor end rings 22. By so positioning hole 40 in pickup tube 28 there are no obstructions to the oil spray 46 existing hole 40 and being thrown directly against radially inner surfaces 42 of stator end turns 24.
An enclosure 48 is secured to the bottom portion of outer housing 4 in coaxial, spaced-apart relationship with pickup tube 28 to reduce the effects of cavitation.
Enclosure 48 is provided with a plurality of holes 50 so that oil in oil sump 12 may pass therethrough and within enclosure 48.
In operation, crankshaft 8 is rotated upon actuation of motor-compressor unit 2 and rotates pickup tube 28 within enclosure 48. Oil within oil sump 12 is ~hen drawn upwardly through axial hore 36 wherein a portion is delivered further upwardly through passages 16, 18 and 20 ~or lubrication of compressor components in the upper portion of motor compressor unit 2. The remainder of the oil pumped upwardly through axial bore 36 is thrown radially outwardly through hole 40 and directly against radially inner surfaces 42 of stator end turns 24, and since hole 40 is below the lower surfaces 44 of ring 22, oil spray 46 avoids contacting any motor-compressor unit parts prior to contacting inner surfaces 42 of stator end turns 24. This su~stan-tially eliminates any potential temperature increase of oil spray 46, which would decrease the cooling of stator end turns 24 by cooling device 14.
While this invention has been described as having a specific embodiment, it will be understood that it is capable of further modifications. This ~2(~5C3~
application is therefore intended to cover any variations~ uses, or adaptations of the invention following the general principles thereof, and including such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains and fall within the limits of the appended claims.
END-TURNS IN A COMPRESSOR
_ This invention pertains to a cooliny device for a hermetic motor-compressor unit, and more particularly to a cooling device that radially sprays a portion of the lubricant pumped by a lubrlcant pick-up tube directly against the lower end turns of the motor stator.
One problem of major concern relating to hermetic 1~ motor-compressor units is the heat generated by its operation which decreases compressor cooling efficiency.
Various devices have been arranged within the housing of the motor-compressor unit to pump lubricant from an oil sump therein onto or against different structural members to reduce their temperatures caused by the heat generated by the units operation. An example of one such device is disclosed in U.S. Patent 3,6~8,337 wherein a portion of the pumped lubricant is used to cool the lower en~ ring o F the rotor and thereafter the lower end turns of the stator. In particular, oil flows ~rom the oil sump up through an oil pick-up tube into a chamber, which is formed by the inner surfaces of the rotor end ring, a radially disposed flange of the pick-up tube, and the rotating crank-~5 shaft. Passages are radially provided in the rotorend ring so that the oil within the chamber may pass therethrough and be dispersed against the stator lower end turns for the cooling thereof. However, since the lubricant must first pass through passages in the rotor end rings before contacting ~he stator lower end turns, the cooling experienced by the stator lower end turns is reduced because of the ,~, increase in temperature of the lubricant as it passes through the radial passayes removing heat energy from the rotor end ring.
A further disadvantage of the device disclosed in Patent 3,618,337 is the increase in cost resulting from the s-tructure defining the oil chamber, i.e., the rotor end ring, the radially disposed flange of the pick-up tube, and the fastener assemblies required to attach the radial flange to the rotor end ring lower surfaces, and the drilling of a plurality of radial passages in the rotor end ring.
Another prior art device similar to the above-mentioned prior art device is disclosed in U.S.
Patent 3,560,116 wherein oil is delivered by a pump into two streams, one stream being used for normal lubricating purposes associated with the parts dlsposed in the upper housing area, and a second stream for cooling the motor parts directly. The two streams of oil are created by two oil pump pic~-up tubes, an inner tube and an outer tube, wherein the outer tube pumps lubricant upwardly through the area defined between the inner and outer tube into a chamber defined by the rotor lower short-circui-ting ring, a flange radially disposed on the top portion of the outer tube, and the inner tube which extends upwardly to the rotating crankshaft. The radial flange has depressed grooves radially disposed therein and with the lower surface of the lower short-circuiting ring form radial passages for delivering a portion of the lubricant therethrough against the stator lower coil ends. Any cooling experienced by the stator lower coil ends is reduced 3~5~5a~
since the oll being sprayed thereon has absorbed heat energy from the radial flange, inner pick-up tube, and the rotor lower short-circuiting ring. As with the prior art cooling device clisclosed in the above U.S. Patent 3,618,337, the -temperature of the rotor is generally higher than the temperature of the stator, thereby further reducing any cooling effect of the oil against the stator lower coil ends.
Further, the cooling device in U.S. Patent 3,560,116 undesirably increases the cost of the compressor because of its rather complex construction requiring two coaxially disposed pick-up tubes, the radial flange disposed on the upper portion of the outer pick~up tube, and the depressed grooves disposed within the radial flange.
The cooling device of the present invention eliminates the disadvantages and problems discussed in the above prior art by providing a lubricant pick-up tube having a hole radially disposed therein.
The hole is axially located on the lubrican-t pick-up tube such that the oil thrown radially outwardly therethrough avoids contact with other motor parts during its flight to and directly against the radially inner surfaces of the stator lower end turns. Since the oil thrown radially outwardly through -the hole is pumped directly by the lubricant pick-up tube from the oil sump, that portion of the oil maintains a substantially constant temperature so as to provide maximum cooling to the stator lower end turns. Since this portion of the pumped oil does not first contact any other motor components prior to contacting the sta-tor lower end turns, the stator cooling effectuated 5~
by that portion of the pumped oil is greater than the cooliny resulting ~rom the above prior art cooliny devices.
In ~urther contras-t with the above prior art cooling devices, the cooling device of the present invention is substantially less costly to construct since it does not involve additional structural members, for e~xample, radially extending flanges from the upper portion of the pick~up tube, depressed grooves within the radial flange, or a plurality of coaxially disposed pick-up tubes.
A further advantage of the cooling device of the present invention is that it reduces the requirement for close tolerances of the stator lower end turns by throwing the oil directly on the end turns, which makes submersion of the end turns in the oil less critical in controlling motor temperatures as may be the case in some prior art compressors.
In one embodiment of the present inventionl there is provided in a hermetic motor-compressor unit a cooling device comprising a lubricant pick-up tube having one end connec-ted to a rotating crankshaft and its opposite end extending into an oil sump disposed in the housing of -the motor-compressor unit. The pick-up tube has an axial bore upwardly extending therein from i-ts opposite end and through which oil from the oil sump is pumped. The motor stator has its lower end turns extending downwardly such that their radially inner surfaces are in radially adjacent and spaced-apart relationship with the pick-up tube.
The pick-up tube further has a radial passaye means disposed therein which communicates with the axial S~8 bore and which is in direct facing relationship with the sta-tor lower end turns. ~s the lubrican-t-pick-up tube is rotated, a portion of the lubrlcant pumped upwardly through the axial bore is thrown radially outwardly through the radial passage means directly against the radially inner surfaces of the stator lower end turns prior to contacting any other portion of the motor unit.
It is an object of the present invention to provide an improved cooling device for a hermetic motor-compressor unit which transports a portion of the oil ~rom the oil sump upwardly through a lubricant pick-up tube and directly against the radially inner surfaces of the stator lower end turns prior to contacting and drawing heat from any other motor components.
Another ob~ect of the present invention is to provide an improved cooling device for the stator lower end turns in a hermetic motor-compressor unit which is inexpensive to manufacture.
The above mentioned and other features and objects of this invention, and the manner of attaining them, will become more apparent and the inven-tion itself will be better understood by reference to the description of an embodiment of the invention taken in conjunction with the drawing, which is a longi-tudinal sectional view of the lower portion of a hermetic motor-compressor unit incorporating a preferred embodiment of the present invention.
Referring to the drawing, lower portion 2 of a hermetic motor-compressor unit is illustrated com-prising a compressor outer housing ~ enclosing rotor ~Z05~
6 which is secured to crankshaft 8 to rota-te therewith, stator 10 which is secured within houslng 4, oil sump ].2 disposed in the lower por~ion of outer housin~ 4, and cooling device 14 of the present in~ention.
Crankshaft 8 i5 conventionally mounted within motor compressor unit 2 and has axially disposed therein a plurality of passages 16, 18 and 20 for delivering oil to the upper components of motor compressor unit 2. The portion of oil delivered upwardly through passages 16, 18 and 20 generally returns to oil sump 12 by gravitational means.
RotGr 6 has rotor end rings 22, and stator 10 has stator motor end turns 24 ~xtending downwardly in outer housing 4 so that the lower end portions of end turns 24 may be disposed below oil level 26 in oil sump 12.
Cooling device 14 comprises pickup tube 28, which has a generally cylindrical midportion 30 a lower conical portion 32 ~oined to midportion 30 and an upper portion 34 disposed within passage 16 of crankshaft 8. As illustrated, pickup tube 28 has axial bore 36 disposed therein and which communicates with passage 16 of crankshaft 4. The lower end of axial bore 36 defines opening 38 in conical portion 32, which is disposed below oil level 26.
Radially disposed within pickup tube 28 is hole 40 through which a portion of the pumped lubricant is thrown radially outwardly. Important to cooling device 14 is the axial location of hole 40 in pickup tube 28. ~Iole 40 is disposed within pickup tube 28 so that it is directly opposite the radially inner surfaces 42 of stator end turns 24 and below lower s~
surfaces 44 of rotor end rings 22. By so positioning hole 40 in pickup tube 28 there are no obstructions to the oil spray 46 existing hole 40 and being thrown directly against radially inner surfaces 42 of stator end turns 24.
An enclosure 48 is secured to the bottom portion of outer housing 4 in coaxial, spaced-apart relationship with pickup tube 28 to reduce the effects of cavitation.
Enclosure 48 is provided with a plurality of holes 50 so that oil in oil sump 12 may pass therethrough and within enclosure 48.
In operation, crankshaft 8 is rotated upon actuation of motor-compressor unit 2 and rotates pickup tube 28 within enclosure 48. Oil within oil sump 12 is ~hen drawn upwardly through axial hore 36 wherein a portion is delivered further upwardly through passages 16, 18 and 20 ~or lubrication of compressor components in the upper portion of motor compressor unit 2. The remainder of the oil pumped upwardly through axial bore 36 is thrown radially outwardly through hole 40 and directly against radially inner surfaces 42 of stator end turns 24, and since hole 40 is below the lower surfaces 44 of ring 22, oil spray 46 avoids contacting any motor-compressor unit parts prior to contacting inner surfaces 42 of stator end turns 24. This su~stan-tially eliminates any potential temperature increase of oil spray 46, which would decrease the cooling of stator end turns 24 by cooling device 14.
While this invention has been described as having a specific embodiment, it will be understood that it is capable of further modifications. This ~2(~5C3~
application is therefore intended to cover any variations~ uses, or adaptations of the invention following the general principles thereof, and including such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains and fall within the limits of the appended claims.
Claims (4)
1. In a hermetic motor-compressor unit including an outer housing having a lubricant sump in the bottom thereof, a rotatable crankshaft vertically disposed in said housing, and a motor having a stator circumferentially disposed about said rotating crankshaft and a rotor connected to said rotating crankshaft for rotation thereof, a cooling device comprising:
a centrifugal lubricant pick-up tube having one end connected to said rotating crankshaft for rotation therewith and its opposite end extending vertically into said lubricant sump, said pick-up tube having an axial bore extending upwardly therein from said opposite end, said stator having lower end turns extending downwardly in said outer housing, said lower end turns having their radially inner surfaces in radially adjacent and spaced-apart relationship with said pick-up tube, said pick-up tube having a radial passage means therein in communication with said axial bore and in direct facing relationship with said stator lower end turns for throwing a portion of lubricant pumped upwardly through said axial bore radially outwardly therethrough and directly against said radially inner surfaces of said lower end turns for the cooling thereof prior to contacting any other portions of said motor.
a centrifugal lubricant pick-up tube having one end connected to said rotating crankshaft for rotation therewith and its opposite end extending vertically into said lubricant sump, said pick-up tube having an axial bore extending upwardly therein from said opposite end, said stator having lower end turns extending downwardly in said outer housing, said lower end turns having their radially inner surfaces in radially adjacent and spaced-apart relationship with said pick-up tube, said pick-up tube having a radial passage means therein in communication with said axial bore and in direct facing relationship with said stator lower end turns for throwing a portion of lubricant pumped upwardly through said axial bore radially outwardly therethrough and directly against said radially inner surfaces of said lower end turns for the cooling thereof prior to contacting any other portions of said motor.
2. The unit of Claim 1 wherein said lower end turns of said stator have a bottom portion thereof immersed in said lubricant sump.
3. The unit of Claim 1 wherein the diameter of said radial passage means is less than the diameter of said axial bore.
4. The unit of Claim 1 wherein said radial passage means comprises a hole in said pick-up tube axially below said rotor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US43382482A | 1982-10-12 | 1982-10-12 | |
| US433,824 | 1982-10-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1205058A true CA1205058A (en) | 1986-05-27 |
Family
ID=23721672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000435892A Expired CA1205058A (en) | 1982-10-12 | 1983-09-01 | Device for cooling motor end-turns in a compressor |
Country Status (16)
| Country | Link |
|---|---|
| JP (1) | JPS5993978A (en) |
| AR (1) | AR230486A1 (en) |
| AU (1) | AU546942B2 (en) |
| CA (1) | CA1205058A (en) |
| DE (1) | DE3334441A1 (en) |
| DK (1) | DK466583A (en) |
| ES (1) | ES8407196A1 (en) |
| FR (1) | FR2534323B1 (en) |
| GB (1) | GB2128418B (en) |
| IL (1) | IL69665A0 (en) |
| IN (1) | IN159137B (en) |
| IT (1) | IT1160214B (en) |
| MX (1) | MX158852A (en) |
| PH (1) | PH22900A (en) |
| SU (1) | SU1296017A3 (en) |
| TR (1) | TR22484A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9322866D0 (en) * | 1993-11-05 | 1993-12-22 | Lucas Ind Public Limited | A rotary generator |
| DE102004055179A1 (en) * | 2004-11-16 | 2006-05-24 | Zf Friedrichshafen Ag | Laminated core of a stator and / or rotor of a spray-oil-cooled electric machine and injection-oil-cooled electric machine |
| JP7292881B2 (en) | 2019-01-10 | 2023-06-19 | エドワーズ株式会社 | Vacuum pump |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA674037A (en) * | 1959-12-03 | 1963-11-12 | Ateliers De Constructions Electriques De Charleroi, Societe Anonyme | Moteur entierement ferme |
| DE1501139A1 (en) * | 1965-05-19 | 1969-12-18 | Sanyo Electric Co | Hermetically sealed motor-compressor for a refrigeration machine |
| US3445695A (en) * | 1966-05-25 | 1969-05-20 | Borg Warner | Cooling system for hermetic dynamoelectric devices |
| DE1628157C3 (en) * | 1968-02-01 | 1973-10-11 | Danfoss A/S, Nordborg (Daenemark) | Device for cooling an encapsulated motor compressor, in particular a clamping machine |
| US3618337A (en) * | 1970-06-22 | 1971-11-09 | Carrier Corp | Hermetic refrigeration compressor |
| JPS5268999A (en) * | 1975-12-05 | 1977-06-08 | Nissin Electric Co Ltd | Method of refining orthophosphoric acid ester oil for electric insulation |
| SE440817B (en) * | 1978-07-26 | 1985-08-19 | Ingo H Friedrichs | RENGORINGSAGGREGAT |
| DD138258A1 (en) * | 1978-08-03 | 1979-10-17 | Eberhard Guenther | DEVICE FOR REMOVING THE MOTOR SHAFT IN HERMETIC COATING COMPRESSORS |
| IT1128947B (en) * | 1980-07-18 | 1986-06-04 | Aspera Spa | IMPROVEMENTS IN HERMETIC COMPRESSORS FOR REFRIGERATING FLUIDS |
-
1983
- 1983-09-01 CA CA000435892A patent/CA1205058A/en not_active Expired
- 1983-09-05 IL IL69665A patent/IL69665A0/en unknown
- 1983-09-06 GB GB08323817A patent/GB2128418B/en not_active Expired
- 1983-09-23 DE DE19833334441 patent/DE3334441A1/en not_active Ceased
- 1983-09-26 IN IN1177/CAL/83A patent/IN159137B/en unknown
- 1983-10-05 AU AU19885/83A patent/AU546942B2/en not_active Ceased
- 1983-10-07 JP JP58187165A patent/JPS5993978A/en active Pending
- 1983-10-10 SU SU833650512A patent/SU1296017A3/en active
- 1983-10-10 ES ES526364A patent/ES8407196A1/en not_active Expired
- 1983-10-10 FR FR838316066A patent/FR2534323B1/en not_active Expired
- 1983-10-11 PH PH29682A patent/PH22900A/en unknown
- 1983-10-11 MX MX199084A patent/MX158852A/en unknown
- 1983-10-11 IT IT68040/83A patent/IT1160214B/en active
- 1983-10-11 DK DK466583A patent/DK466583A/en not_active Application Discontinuation
- 1983-10-11 AR AR294520A patent/AR230486A1/en active
- 1983-10-12 TR TR6878/83A patent/TR22484A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB8323817D0 (en) | 1983-10-05 |
| AR230486A1 (en) | 1984-04-30 |
| TR22484A (en) | 1987-08-10 |
| ES526364A0 (en) | 1984-08-16 |
| FR2534323A1 (en) | 1984-04-13 |
| JPS5993978A (en) | 1984-05-30 |
| IL69665A0 (en) | 1983-12-30 |
| DE3334441A1 (en) | 1984-04-12 |
| IT8368040A0 (en) | 1983-10-11 |
| SU1296017A3 (en) | 1987-03-07 |
| GB2128418B (en) | 1986-02-26 |
| DK466583A (en) | 1984-04-13 |
| GB2128418A (en) | 1984-04-26 |
| DK466583D0 (en) | 1983-10-11 |
| MX158852A (en) | 1989-03-17 |
| AU1988583A (en) | 1984-04-19 |
| IT1160214B (en) | 1987-03-04 |
| FR2534323B1 (en) | 1989-04-21 |
| ES8407196A1 (en) | 1984-08-16 |
| PH22900A (en) | 1989-01-19 |
| IN159137B (en) | 1987-03-28 |
| AU546942B2 (en) | 1985-09-26 |
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