CN202364057U - Motor cooling structure in screw type refrigeration compressor - Google Patents
Motor cooling structure in screw type refrigeration compressor Download PDFInfo
- Publication number
- CN202364057U CN202364057U CN2011204802554U CN201120480255U CN202364057U CN 202364057 U CN202364057 U CN 202364057U CN 2011204802554 U CN2011204802554 U CN 2011204802554U CN 201120480255 U CN201120480255 U CN 201120480255U CN 202364057 U CN202364057 U CN 202364057U
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Abstract
Provided is a motor cooling structure in a screw type refrigeration compressor wherein a motor includes a stator, a rotor and a motor housing. One side of the motor housing is a refrigerant suction end, and the other side is a refrigerant discharge end. An air channel is retained between the stator and the rotor, which is characterized in that a space between the motor housing and the stator communicates the refrigerant suction end with the refrigerant discharge end to be configured into an auxiliary air channel. A circular separation blade is disposed round an axis of the rotor in the refrigerant suction end of the motor housing and set to keep a distance from an end of the auxiliary air channel, so as to make the refrigerant backflow to a winding end of the stator through the block of the circular separation blade. Compared to the prior art, the motor cooling structure in the utility mode can greatly enhance the cooling effect to the motor.
Description
Technical field
The utility model relates to screw type refrigerating compressor, is specifically related to the motor cooling structure in this screw type refrigerating compressor.
Background technology
Can produce loss during the motor operation, comprise the stator core loss, the stator winding loss, the rotor core loss, loss of rotor aluminium and mechanical loss, these losses all are transformed into heat energy, and the temperature of motor each several part is raise.In the motor heat-resisting the poorest be the insulating material of winding, when motor temperature was no more than the maximum permissible temperature of used insulating material, the life-span of insulating material was longer, can reach 15～20 years; Otherwise if temperature surpasses above-mentioned maximum temperature, then insulating material wears out, becomes fragile, and shortens electrical machinery life, under the serious situation, insulating material with carbonization, go bad, lose insulation property, thereby make burn-down of electric motor.Have data to show: when 1 ℃ of the every rising of temperature rise, the life-span of motor will reduce 6 years.
Two principal elements that influence electric machine temperature rise are loss of motor own and extraneous cooling condition; Therefore for making electric machine temperature rise be no more than set point; Must reduce the temperature rise of motor from two aspects: the one, make electrical machinery plant optimize motor body from design and production technology, make the loss of electric machine reduce to minimum; The 2nd, improve extraneous cooling effect, the temperature rise of motor is limited in certain temperature range.Wherein, the way of the cooling effect that raising is extraneous is modal to be that cold-producing medium is blown in the motor, the heat that produces when taking away machine operation.Said motor comprises stator, rotor and electric machine casing.One end of said electric machine casing is a suction end, and the other end is an exhaust end, between stator and rotor air gap is arranged, and this air gap constitutes an air channel, and refrigerated medium flows through from this air channel, reaches the purpose of cooling motor.But because refrigerant flow direction is: the suction end of electric machine casing is to the exhaust end of electric machine casing, thus poor at the stator winding end cooling effect of electric machine casing exhaust end end, be difficult to satisfy motor and cool off needs normally.
Therefore, the cooling effect that how to improve existing motor just become the utility model the problem that will study.
Summary of the invention
The purpose of the utility model provides the motor cooling structure in a kind of screw type refrigerating compressor, to solve the not good problem of cooling effect of motor in the existing screw type refrigerating compressor.
For achieving the above object; The technical scheme that the utility model adopts is: the motor cooling structure in a kind of screw type refrigerating compressor; Said motor comprises stator, rotor and electric machine casing; One end of said electric machine casing is the cold-producing medium suction end, and the other end is the cold-producing medium exhaust end, leaves the air channel between said stator and rotor; Wherein: have the gap between said electric machine casing and stator, this gap is communicated with said cold-producing medium suction end and the cold-producing medium exhaust end constitutes auxiliary air channel; The axis of son of rotating in the cold-producing medium exhaust end of said electric machine casing is provided with an annular catch, and this annular catch is at a distance of being provided with in the end in said auxiliary air channel, so that cold-producing medium stops and is back to the winding overhang of said stator through annular catch.
Related content in the technique scheme is explained as follows:
1. in the such scheme; Said motor is the part of screw type refrigerating compressor, and the operation principle of this screw type refrigerating compressor is to lean on the generation pressure differential of compressor, so that the cold-producing medium in the unit is sucked in the compressor; Pass through the compression of compressor again; Improve pressure, discharge compressor and get into unit, move in circles with this.
2. in the such scheme, said cold-producing medium is gaseous state (being the gas-liquid mixed attitude sometimes).
3. in the such scheme, said cold-producing medium stops through annular catch and is back to the winding overhang of said stator, makes this winding overhang can access more cold-producing medium, significantly improves the cooling effect of motor.
4. in the such scheme, the applying that contacts with the internal face of electric machine casing of the outer peripheral face of said annular catch.
5. in the such scheme, the axis direction of the inwall upper edge rotor of said electric machine casing is provided with many ribs, and these many ribs are around the circumferential arrangement of electric machine casing inwall, and the space between adjacent rib is said gap.
The utility model operation principle and advantage are following:
Motor cooling structure in a kind of screw type refrigerating compressor of the utility model; Cold-producing medium exhaust end place through at electric machine casing adds an annular catch; So that cold-producing medium can stop through annular catch and be back to the winding overhang of said stator; Make this winding overhang can access more cold-producing medium, improve the cooling effect of motor.
Description of drawings
Accompanying drawing 1 combines the cutaway view of refrigerant flow direction for the utility model embodiment;
Accompanying drawing 2 is the cold-producing medium exhaust end end face structure sketch map of the utility model embodiment.
In the above accompanying drawing: 1. stator; 2. rotor; 3. electric machine casing; 4. cold-producing medium suction end; 5. cold-producing medium exhaust end; 6. air channel; 7. gap; 8. annular catch; 9. winding overhang; 10. rib.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
Embodiment: referring to accompanying drawing 1, shown in 2, the motor cooling structure in a kind of screw type refrigerating compressor, said motor comprise stator 1, rotor 2 and electric machine casing 3.
One end of said electric machine casing 3 is a cold-producing medium suction end 4, and the other end is a cold-producing medium exhaust end 5, and 2 of said stator 1 and rotors leave air channel 6.Said cold-producing medium is the gaseous fluorine Leon, in screw type refrigerating compressor, circulates.
Wherein, 1 of said electric machine casing 3 and stator have gap 7, and this gap 7 is communicated with said cold-producing medium suction end 4 and constitutes auxiliary air channel with cold-producing medium exhaust end 5.Son 2 the axis that rotates in the cold-producing medium exhaust end 5 of said electric machine casing 3 is provided with an annular catch 8; This annular catch 8 is provided with at a distance of the end in said auxiliary air channel; So that cold-producing medium stops through annular catch 8 and is back to the winding overhang 9 of said stator 1; Make this winding overhang 9 can access more cold-producing medium, significantly improve the cooling effect of motor.
In addition, the outer peripheral face of said annular catch 8 applying that contacts with the internal face of electric machine casing 3.The axis direction of the inwall upper edge rotor 2 of said electric machine casing 3 is provided with many ribs 10, and these many ribs 10 are around the circumferential arrangement of electric machine casing 3 inwalls, and the space that adjacent rib is 10 is said gap 7.
Motor cooling structure in a kind of screw type refrigerating compressor of the utility model; Cold-producing medium exhaust end place through at electric machine casing adds an annular catch; So that cold-producing medium can stop through annular catch and be back to the winding overhang of said stator; Make this winding overhang can access more cold-producing medium, improve the cooling effect of motor.
The foregoing description only is the technical conceive and the characteristics of explanation the utility model, and its purpose is to let the personage who is familiar with this technology can understand content of the utility model and enforcement according to this, can not limit the protection range of the utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection range of the utility model.
Claims (3)
1. the motor cooling structure in the screw type refrigerating compressor, said motor comprises stator, rotor and electric machine casing, and an end of said electric machine casing is the cold-producing medium suction end, and the other end is the cold-producing medium exhaust end, leaves the air channel between said stator and rotor; It is characterized in that:
Have the gap between said electric machine casing and stator, this gap is communicated with said cold-producing medium suction end and the cold-producing medium exhaust end constitutes auxiliary air channel; The axis of son of rotating in the cold-producing medium exhaust end of said electric machine casing is provided with an annular catch, and this annular catch is at a distance of being provided with in the end in said auxiliary air channel, so that cold-producing medium stops and is back to the winding overhang of said stator through annular catch.
2. motor cooling structure according to claim 1 is characterized in that: the applying that contacts with the internal face of electric machine casing of the outer peripheral face of said annular catch.
3. motor cooling structure according to claim 1 is characterized in that: the axis direction of the inwall upper edge rotor of said electric machine casing is provided with many ribs, and these many ribs are around the circumferential arrangement of electric machine casing inwall, and the space between adjacent rib is said gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204802554U CN202364057U (en) | 2011-11-28 | 2011-11-28 | Motor cooling structure in screw type refrigeration compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204802554U CN202364057U (en) | 2011-11-28 | 2011-11-28 | Motor cooling structure in screw type refrigeration compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202364057U true CN202364057U (en) | 2012-08-01 |
Family
ID=46575213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204802554U Expired - Lifetime CN202364057U (en) | 2011-11-28 | 2011-11-28 | Motor cooling structure in screw type refrigeration compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202364057U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322716A (en) * | 2014-06-11 | 2016-02-10 | 上海汉钟精机股份有限公司 | Motor cooling structure for direct connection screw compressor |
| CN105610277A (en) * | 2016-03-04 | 2016-05-25 | 石策略 | High-power electric engine |
-
2011
- 2011-11-28 CN CN2011204802554U patent/CN202364057U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322716A (en) * | 2014-06-11 | 2016-02-10 | 上海汉钟精机股份有限公司 | Motor cooling structure for direct connection screw compressor |
| CN105610277A (en) * | 2016-03-04 | 2016-05-25 | 石策略 | High-power electric engine |
| CN105610277B (en) * | 2016-03-04 | 2018-12-21 | 东莞市天孚电机科技有限公司 | A kind of high pass filter electric motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120801 |
|
| CX01 | Expiry of patent term |