CN109412351B - Motor cooling system of semi-enclosed centrifugal compressor - Google Patents
Motor cooling system of semi-enclosed centrifugal compressor Download PDFInfo
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- CN109412351B CN109412351B CN201811541434.7A CN201811541434A CN109412351B CN 109412351 B CN109412351 B CN 109412351B CN 201811541434 A CN201811541434 A CN 201811541434A CN 109412351 B CN109412351 B CN 109412351B
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- fluid channel
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- 238000001816 cooling Methods 0.000 title claims abstract description 33
- 239000003507 refrigerant Substances 0.000 claims abstract description 79
- 239000012809 cooling fluid Substances 0.000 claims abstract description 55
- 238000005507 spraying Methods 0.000 claims abstract description 40
- 239000007921 spray Substances 0.000 claims description 41
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 51
- 238000004804 winding Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 12
- 239000000203 mixture Substances 0.000 description 12
- 239000003595 mist Substances 0.000 description 4
- 239000000110 cooling liquid Substances 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000010618 wire wrap Methods 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
-
- 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
- H02K9/20—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
Abstract
The invention discloses a motor cooling system of a semi-sealed centrifugal compressor, wherein a motor rotor is sleeved on a motor shaft, a motor stator is sleeved on the motor rotor, a motor shell is arranged outside the motor stator, bearing seats are arranged at the joints of two ends of the motor shaft and the motor shell, a plurality of thermistor sensors are arranged at two ends of a motor stator winding, a first cooling fluid channel is arranged between the motor shell and the outer circle of the motor stator, an electronic expansion valve for controlling the flow of refrigerant in the first cooling fluid channel is arranged on the motor shell, and cooling fluid channel outlets communicated with the first cooling fluid channel are arranged at the left end and the right end of the motor; the invention can adjust the opening of the electronic expansion valve according to the temperature detected by the thermistor sensor, thereby controlling the spraying amount of the refrigerant when the motor is cooled, adopting a directional scattering spraying mode, simultaneously obviously reducing the liquid supply amount of the refrigerant and improving the operation reliability of the compressor.
Description
Technical Field
The invention belongs to the technical field of semi-closed centrifugal compressors, and particularly relates to a motor cooling system of a semi-closed centrifugal compressor.
Background
At present, the cooling mode for the semi-hermetic centrifugal compressor is a mode of cooling by refrigerant liquid. The typical motor cooling system design and mechanical design are not optimized and motor cooling can be accomplished in several ways: 1. the high-pressure introduced refrigerant liquid is directly sprayed into the motor shell, so that the motor rotor and the motor stator are cooled simultaneously. The motor stator is partially soaked in the refrigerant liquid, the refrigerant liquid absorbs heat of the motor stator and the rotor and is gasified, the phase change of the refrigerant absorbs a large amount of latent heat of gasification, the motor is cooled, gasified refrigerant gas returns to the low-pressure evaporator or the air suction pipe, the liquid supply amount and the return air flow of the refrigerant reach self-balance, and the liquid injection amount of the refrigerant can be controlled through a valve. The mode has a liquid-over supply mode, the surface of the motor shell is relatively cold and is easy to condense, meanwhile, the refrigerating capacity loss is relatively high, and the windage loss of the motor rotor is relatively high due to the increase of the liquid quantity. 2, the high-pressure refrigerant is directly sprayed into the motor cavity, and the motor is similar to an irrigation type motor cooling mode, and the motor cooling effect is very small due to the fact that the refrigerant cooling structure is simple.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a motor cooling system of a semi-sealed centrifugal compressor, which can adjust the opening of an electronic expansion valve according to the temperature detected by a thermistor sensor, thereby controlling the liquid spraying amount of a refrigerant during motor cooling, adopting a directional scattering spraying mode, having excellent motor cooling effect, remarkably reducing the liquid supply amount of the refrigerant, improving the operation reliability of the compressor and improving the operation efficiency of the compressor.
The technical scheme adopted by the invention is as follows: the motor cooling system of the semi-sealed centrifugal compressor comprises a motor shell, a motor stator, a motor rotor and a motor shaft, wherein the motor rotor is sleeved on the motor shaft, the motor stator is sleeved on the motor rotor, the motor shell is arranged outside the motor stator, bearing seats are arranged at the joint positions of two ends of the motor shaft and the motor shell, a plurality of thermistor sensors are arranged at the two ends of a motor stator winding, a first cooling fluid channel is arranged between the motor shell and the outer circle of the motor stator, an electronic expansion valve for controlling the flow of refrigerant in the first cooling fluid channel is arranged on the motor shell, and cooling fluid channel outlets communicated with the first cooling fluid channel are arranged at the left end and the right end of the motor.
In the technical scheme, the thermistor temperature probe embedded in the motor winding can control the opening of the electronic expansion valve according to the actually detected motor temperature so as to control the flow of the refrigerant entering the motor shell for cooling the motor; the electronic expansion valve is arranged before the motor cooling liquid enters, the flow of the refrigerant can be accurately controlled, the control target value is the motor temperature, the control parameters comprise the compressor operation pressure ratio, the compressor load, the cooling liquid temperature and the like, and the purpose is to ensure that the motor performance reduction and the motor shell surface condensation caused by excessive liquid supply are avoided under the reliable and stable motor temperature control condition, and the electronic expansion valve plays the role of throttling and depressurization simultaneously, so that the cooling liquid enters into the motor shell to continuously cool the motor stator enamelled wire header and the refrigerant of the motor rotor to be the intermediate pressure instead of the high pressure.
Preferably, the outlet of the cooling fluid channel is arranged on bearing seats at two ends of the motor shaft, a first annular channel is arranged on the bearing seats, the refrigerant at the outlet of the cooling fluid channel flows into the first annular channel in three directions, and the distance between the inner diameter and the outer diameter of the first annular channel is far smaller than the inner diameter of the cooling fluid channel.
In the above technical scheme, the refrigerant liquid in three directions at the outlet of the cooling fluid channel uniformly flows into the narrow first annular channel, and in the narrowed annular channel, the refrigerant generates local pressure loss, so that the refrigerant flash is generated, the flow rate of the gas-liquid two-phase refrigerant is increased, the larger the gas quantity is, the larger the cavitation share is, the narrower the flow channel becomes, the higher the flow rate is, the gas-liquid two-phase mixture is sprayed onto enamelled wire wrapping heads at two ends of the motor stator in a mist form, and the motor rotor is further cooled.
Preferably, the outlet of the cooling fluid channel is arranged on bearing seats at two ends of the motor shaft, a second annular channel is arranged at the inner side of the bearing seat, the refrigerant at the outlet of the cooling fluid channel flows downwards into the second annular channel, a plurality of first capillary spraying ports and a plurality of second capillary spraying ports are uniformly arranged on the second annular channel, the spraying angle of the first capillary spraying ports is inclined upwards, and the spraying angle of the second capillary spraying ports is inclined downwards.
Preferably, the outlet of the cooling fluid channel is arranged on the bearing seat at two ends of the motor shaft, a third annular channel and a fourth annular channel are radially arranged on the inner side of the bearing seat from outside to inside in sequence, the refrigerant at the outlet of the cooling fluid channel flows downwards into the third annular channel and the fourth annular channel, a plurality of third capillary spraying ports are uniformly arranged on the third annular channel, a plurality of fourth capillary spraying ports are uniformly arranged on the fourth annular channel, the spraying angle of the third capillary spraying ports is inclined upwards, and the spraying angle of the fourth capillary spraying ports is inclined downwards.
In the above technical solution, the capillary liquid spraying port functions as follows: 1. the medium-pressure refrigerant liquid from the electronic expansion valve can be throttled to a low-pressure refrigerant gas-liquid two-phase mixture, and meanwhile, the flow speed is improved due to the reduction of the flow cross section, and the fixed-point liquid spraying cools the rotor and the stator. 2. According to the actual temperature of the motor stator and the motor rotor, the opening degree of the EEV motor expansion valve and the liquid supply amount of the refrigerant are accurately controlled, the jet speed of the capillary liquid spraying port is high, the refrigerant gas-liquid mixture sprayed out of the capillary liquid spraying port can be well mixed together, once the mixture is sprayed out and enters the cavity, the flow area is suddenly increased, the rapid atomization effect is formed, and the high-speed liquid flow is not impacted on the enameled wire; the better the atomization effect is, the better the dispersion effect of the refrigerant liquid is, the contact area between the liquid and the motor winding is increased, and the more obvious the heat absorption and cooling effects of the vaporization latent heat are. 3. The direction of the capillary spray jet is not directly aligned with the cooled stator and rotor surfaces, but is above the cooling surfaces so that the atomized droplets are dispersed in space to cool the electrons and the rotor. 4. The position of the capillary liquid spraying port and the cooling surface ensure a certain gap for atomizing and dispersing, and the motor is prevented from being impacted.
Preferably, the cooling fluid channel outlet is arranged above two ends of the motor shell, an umbrella-shaped sprayer is arranged below the cooling fluid channel outlet, and a spray opening is arranged below the umbrella-shaped sprayer.
In the technical scheme, the surface of the motor stator is sprayed in an umbrella-shaped form, the flow of the refrigerant used for cooling the total motor is very small, but after passing through a plurality of very small spraying ports, the refrigerant is throttled and depressurized, the dryness of the two-phase mixture of the refrigerant is increased, and the refrigerant gas after flash evaporation in the throttling process and the refrigerant liquid drops are sprayed out from the spraying ports and then are in mist distribution in the motor cavity, so that the optimized effect of cooling the motor is achieved.
Preferably, the cooling fluid channel outlet is arranged above two ends of the motor shell, an annular sprayer is arranged below the cooling fluid channel outlet, a spraying port is arranged below the annular sprayer, and the annular sprayer can ensure that the refrigerant can more comprehensively cool the motor and has better cooling effect.
Preferably, an annular second cooling fluid channel is arranged in the silicon steel sheet of the motor stator, and redundant refrigerant liquid flows along the channel and further cools the motor silicon steel sheet so as to effectively reduce the temperature of the motor.
Preferably, any one of a spiral groove, a baffle plate or a baffle plate is arranged in the cooling fluid channel, the flow pattern of the refrigerant liquid is disturbed by the spiral groove, the baffle plate or the baffle plate, so that the refrigerant liquid fully contacts with the outer circle of the motor stator, the refrigerant liquid absorbs a part of the heat productivity of the stator silicon steel sheet, and a fixed cold curtain layer is formed on the periphery of the motor, namely a low-temperature heat preservation layer is formed.
Preferably, the outlet positions of the spraying ports are radially distributed and uniformly arranged according to a certain angle, the spraying ports are arranged in groups along the length direction when seen from the length direction, and the outlet positions of the spraying ports are chamfered, so that the outward large-angle scattering of the sprayed refrigerant liquid is ensured.
Preferably, the second, third and fourth annular channels have an inner diameter length less than an inner diameter length of the first cooling fluid channel, which facilitates better outflow of refrigerant liquid from the second, third and fourth annular channels.
The beneficial effects achieved by the invention are as follows:
1. an electronic expansion valve is arranged before the motor cools liquid inlet and is used for accurately controlling the flow of refrigerant, the control target value is motor temperature, the control parameters comprise a compressor running pressure ratio, a compressor load, cooling water temperature and the like, and the performance reduction caused by excessive liquid supply and the like are avoided under the reliable and stable motor temperature control condition.
2. Thermistor sensors are arranged at two ends in the motor winding, and the opening degree of the electronic expansion valve is controlled according to the actually detected motor temperature so as to control the flow of the refrigerant entering the motor shell.
3. The cooling fluid channel is internally provided with a spiral groove or a baffle plate, a baffle plate and other modes for disturbing the flowing flow pattern of the refrigerant liquid, so that the refrigerant liquid is fully contacted with the outer circle of the motor stator, the refrigerant liquid absorbs part of the heat productivity of the stator silicon steel sheet, and a fixed cold curtain layer is formed at the periphery of the motor, namely a low-temperature heat preservation layer is formed.
4. The spray opening is further throttled and depressurized, the refrigerant flash improves the flow velocity of the refrigerant, when the refrigerant flows into the large-space motor shell from the micro throttle opening, the flow area is suddenly enlarged, the spray opening sprays dispersed vaporous refrigerant liquid and gas mixture, the vaporous mixture has maximized contact area, when the spray opening contacts with the enamelled wire head of the motor rotor and contacts with the surface of the motor rotor and the surface of the silicon steel sheet of the motor stator, the heat dissipation capacity of the motor can be maximally absorbed, and the refrigerant gas is generated through the submerged flash, so that the motor cooling effect is better.
Drawings
The invention will be further described with reference to the accompanying drawings,
FIG. 1 is a schematic view of the structure of the present invention with a first annular channel;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic view of the structure of the bearing housing of FIG. 1 in accordance with the present invention;
FIG. 4 is a schematic view of the structure of the present invention with a second annular channel;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4 in accordance with the present invention;
FIG. 6 is a schematic view of the structure of the bearing housing of FIG. 4 in accordance with the present invention;
FIG. 7 is a schematic view of the structure of the present invention in which a third annular channel and a fourth annular channel are provided;
FIG. 8 is a cross-sectional view taken along line A-A of FIG. 7 in accordance with the present invention;
FIG. 9 is a schematic view of the structure of the bearing housing of FIG. 7 in accordance with the present invention;
FIG. 10 is a schematic view of the structure of the umbrella sprayer of the invention;
FIG. 11 is a cross-sectional view taken along line A-A of FIG. 10 in accordance with the present invention;
FIG. 12 is a schematic view of the structure of the present invention in which an annular shower is provided;
FIG. 13 is a cross-sectional view taken along line A-A of FIG. 12 in accordance with the present invention;
FIG. 14 is a schematic view of the structure of the cooling passages of the motor stator of the present invention;
FIG. 15 is a cross-sectional view taken along line A-A of FIG. 14 in accordance with the present invention;
wherein 1, a motor shell, 2, a motor stator, 3, a motor rotor, 4, a motor shaft, 5, a bearing seat, 6, a first cooling fluid channel, 61, a cooling fluid channel outlet, 7, an electronic expansion valve, 8, a first annular channel, 9, a second annular channel, 91, a first capillary spray port, 92, a second capillary spray port, 10, a third annular channel, 101, a third capillary spray port, 11, a fourth annular channel, 111, a fourth capillary spray port, 12, an umbrella-shaped sprayer, 13 and a spray port,
14. annular spray thrower 15, second cooling fluid passageway.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings.
The motor cooling system of the semi-sealed centrifugal compressor comprises a motor shell 1, a motor stator 2, a motor rotor 3 and a motor shaft 4, wherein the motor rotor 3 is sleeved on the motor shaft 4, the motor stator 2 is sleeved on the motor rotor 3, the motor shell 1 is arranged outside the motor stator 2, bearing seats 5 are arranged at the joint of two ends of the motor shaft 4 and the motor shell 1, a plurality of thermistor sensors (not marked) are arranged at two ends of windings of the motor stator 2, a first cooling fluid channel 6 is arranged between the motor shell 1 and the outer circle of the motor stator 2, an electronic expansion valve 7 for controlling the flow of refrigerant in the first cooling fluid channel 6 is arranged on the motor shell 1, and cooling fluid channel outlets 61 communicated with the first cooling fluid channel 6 are arranged at the left end and the right end of the motor.
Example 1: as shown in fig. 1 to 3, the cooling fluid channel outlet 61 is disposed on the bearing seat 5 at two ends of the motor shaft 4, the bearing seat 5 is provided with a first annular channel 8, the refrigerant of the cooling fluid channel outlet 61 flows into the first annular channel 8 in three directions, and the distance between the inner diameter and the outer diameter of the first annular channel 8 is far smaller than the inner diameter of the cooling fluid channel 6.
In this technical solution, the refrigerant liquid in three directions at the outlet 61 of the cooling fluid channel uniformly flows into the narrow first annular channel 8, and in the narrowed annular channel, the refrigerant generates local pressure loss, and flash evaporation of the refrigerant is generated, so that the flow rate of the refrigerant in the gas-liquid two phases is increased, the larger the gas quantity is, the larger the cavitation share is, the narrower the flow channel becomes, the higher the flow rate is, and the gas-liquid two-phase mixture is sprayed onto the enamelled wire heads at two ends of the motor stator 2 in a mist form, so as to further cool the motor rotor 3.
Example 2: as shown in fig. 4 and 6, the cooling fluid channel outlet 61 is disposed on the bearing seat 5 at two ends of the motor shaft 4, a second annular channel 9 is disposed at the inner side of the bearing seat 5, the refrigerant of the cooling fluid channel outlet 61 flows into the second annular channel 9 downward, a plurality of first capillary spray openings 91 and a plurality of second capillary spray openings 92 are uniformly disposed on the second annular channel 9, the spray angle of the first capillary spray openings 91 is inclined upward, and the spray angle of the second capillary spray openings 92 is inclined downward.
In this technical scheme, the first capillary spray mouth 91 upwards sprays the liquid refrigerant to the top of motor stator 2 enameled wire baotor, mainly cools off motor stator 2 and enameled wire coil, and the second capillary spray mouth 92 upwards sprays the liquid refrigerant to the clearance between motor rotor 3 and the motor stator 2, cools off motor rotor 3 and motor stator 2 internal diameter. The first capillary spraying port 91 and the second capillary spraying port 92 are further throttled and depressurized, the refrigerant flash increases the flow rate of the refrigerant, when the refrigerant flows into the large-space motor shell 1 from the micro throttle, the flow area is suddenly enlarged, the spraying port sprays a dispersive vaporific mixture of refrigerant liquid and gas, the vaporific mixture has maximized contact area, when the vaporific mixture contacts with the enamelled wire head of the motor rotor and contacts with the surface of the motor rotor 3, the heat dissipation capacity of the motor can be maximally absorbed when the surface of the silicon steel sheet of the motor stator 2, the refrigerant gas is obtained through the submerged heat flash, and therefore, the motor cooling effect is better.
Example 3: as shown in fig. 7 and fig. 9, the cooling fluid channel outlet 61 is disposed on the bearing seat 5 at two ends of the motor shaft 4, a third annular channel 10 and a fourth annular channel 11 are radially disposed inside the bearing seat 5 and radially disposed outside and inside in sequence, the refrigerant of the cooling fluid channel outlet 61 flows down into the third annular channel 10 and the fourth annular channel 11, a plurality of third capillary spray openings 101 are uniformly disposed on the third annular channel 10, a plurality of fourth capillary spray openings 111 are uniformly disposed on the fourth annular channel 11, a spray angle of the third capillary spray openings 101 is inclined upward, and a spray angle of the fourth capillary spray openings 111 is inclined downward.
In this technical scheme, in order to better realize the cooling of motor stator 2 and motor rotor 3, design into two independent passageways, third annular passage 10 is big ring, fourth annular passage 11 is little ring, all open inside ring channel in third annular passage 10 and the fourth annular passage 11, after the refrigerant liquid gets into in the ring channel, third capillary spray port 101 upwards spray liquid and spout the top that motor stator 2 enameled wire was wrapped in, mainly cool off motor stator 2 and enamelled coil, the fourth capillary spray port 111 that the level slightly sprayed liquid downwards spouts liquid to the clearance between motor rotor 3 and the motor stator 2, cool off motor rotor 3 and motor stator 2 external diameter, capillary spray port's position design is with motor rotor 3 or motor stator 2 clearance position parallel and level below, guaranteed just in time spray angle can not impact moving parts again.
Example 4: as shown in fig. 10 and 11, the cooling fluid passage outlets 61 are provided above both ends of the motor casing 1, umbrella sprayers 12 are provided below the cooling fluid passage outlets 61, and spray ports 13 are provided below the umbrella sprayers 12.
In the technical scheme, the surface of the motor stator 2 is in umbrella-shaped spraying, the flow of the refrigerant used for cooling the total motor is very small, but after passing through a plurality of very small spraying ports, the refrigerant is throttled and depressurized, the dryness of the two-phase mixture of the refrigerant is increased, and the refrigerant gas after flash evaporation in the throttling process and the refrigerant liquid drops are sprayed out from the spraying ports and then are in mist distribution in the motor cavity, so that the optimized effect of cooling the motor is achieved.
Example 5: as shown in fig. 12 and 13, the cooling fluid channel outlets 61 are disposed above two ends of the motor casing 1, an annular sprayer 14 is disposed below the cooling fluid channel outlets 61, and a spraying opening 13 is disposed below the annular sprayer 14, and the annular sprayer 13 can ensure that the refrigerant can cool the motor more comprehensively, so that the cooling effect is better.
As shown in fig. 14 and 15, an annular second cooling fluid channel 15 is provided in the silicon steel sheet of the motor stator 2, and an excessive refrigerant liquid flows along the channel and further cools the motor silicon steel sheet to effectively reduce the motor temperature.
The foregoing is a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent variation and variation of the above embodiment according to the technical substance of the present invention falls within the scope of the technical solution of the present invention.
Claims (3)
1. The motor cooling system of the semi-sealed centrifugal compressor comprises a motor shell, a motor stator, a motor rotor and a motor shaft, wherein the motor rotor is sleeved on the motor shaft, the motor stator is sleeved on the motor rotor, the motor shell is arranged outside the motor stator, and bearing seats are arranged at the joints of two ends of the motor shaft and the motor shell. An annular second cooling fluid channel is arranged in the silicon steel sheet of the motor stator; the arrangement mode of the cooling fluid channel outlet comprises the following three modes:
1. the cooling fluid channel outlets are arranged on bearing seats at two ends of the motor shaft, a first annular channel is arranged on the bearing seats, the refrigerant at the cooling fluid channel outlets flows into the first annular channel in three directions, and the distance between the inner diameter and the outer diameter of the first annular channel is far smaller than the inner diameter of the cooling fluid channel;
2. the cooling fluid channel outlets are arranged on bearing seats at two ends of a motor shaft, a second annular channel is arranged at the inner side of the bearing seats, the refrigerant at the cooling fluid channel outlets flows downwards into the second annular channel, a plurality of first capillary spray openings and a plurality of second capillary spray openings are uniformly arranged on the second annular channel, the spray angles of the first capillary spray openings are inclined upwards, and the spray angles of the second capillary spray openings are inclined downwards;
3. the cooling fluid channel outlet is arranged on bearing seats at two ends of a motor shaft, a third annular channel and a fourth annular channel are radially arranged on the inner side of the bearing seats from outside to inside in sequence, the refrigerant at the cooling fluid channel outlet flows downwards into the third annular channel and the fourth annular channel, a plurality of third capillary spraying ports are uniformly arranged on the third annular channel, a plurality of fourth capillary spraying ports are uniformly arranged on the fourth annular channel, the spraying angle of the third capillary spraying ports is inclined upwards, and the spraying angle of the fourth capillary spraying ports is inclined downwards.
2. A motor cooling system for a semi-hermetic centrifugal compressor according to claim 1, wherein any one of a spiral groove, a baffle or a partition is provided in the cooling fluid passage.
3. The motor cooling system of a semi-hermetic centrifugal compressor according to claim 1, wherein the second, third and fourth annular passages have an inner diameter length smaller than an inner diameter length of the first cooling fluid passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811541434.7A CN109412351B (en) | 2018-12-17 | 2018-12-17 | Motor cooling system of semi-enclosed centrifugal compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811541434.7A CN109412351B (en) | 2018-12-17 | 2018-12-17 | Motor cooling system of semi-enclosed centrifugal compressor |
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| CN109412351A CN109412351A (en) | 2019-03-01 |
| CN109412351B true CN109412351B (en) | 2024-04-02 |
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| CN109936241A (en) * | 2019-03-27 | 2019-06-25 | 上海蔚来汽车有限公司 | Motor |
| CN112747391A (en) * | 2019-10-29 | 2021-05-04 | 青岛海尔空调电子有限公司 | Air conditioning unit and compressor cooling control method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000146331A (en) * | 1998-11-06 | 2000-05-26 | Mitsubishi Electric Corp | Cooling device for motor for refrigerant compressor |
| CN103138488A (en) * | 2011-11-24 | 2013-06-05 | 苏州贝得科技有限公司 | Composite cooling system of three-phase asynchronous motor for semi-hermetic refrigeration compressor |
| CN103683673A (en) * | 2013-11-13 | 2014-03-26 | 华南理工大学 | Direct spray-type motor cooling system |
| CN104065208A (en) * | 2014-06-06 | 2014-09-24 | 中国科学院广州能源研究所 | Generator cooled by organic working medium |
| CN105871125A (en) * | 2015-01-21 | 2016-08-17 | 东方电气集团东方电机有限公司 | Rotary motor atomizing evaporative cooling system, motor and cooling method thereof |
| CN108870790A (en) * | 2018-08-02 | 2018-11-23 | 合肥天鹅制冷科技有限公司 | A kind of centrifugal refrigerating machines electromotor cooling system |
| CN209150916U (en) * | 2018-12-17 | 2019-07-23 | 无锡职业技术学院 | A kind of half seals the electromotor cooling system of centrifugal compressor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2652333B1 (en) * | 2010-12-16 | 2019-10-16 | Johnson Controls Technology Company | Motor cooling system |
| JP5837997B2 (en) * | 2012-02-07 | 2015-12-24 | ジョンソン コントロールズ テクノロジー カンパニーＪｏｈｎｓｏｎ Ｃｏｎｔｒｏｌｓ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏｍｐａｎｙ | Airtight motor cooling and control |
| JP2013169029A (en) * | 2012-02-14 | 2013-08-29 | Kobe Steel Ltd | Power generator |
| JP6552851B2 (en) * | 2015-03-19 | 2019-07-31 | 三菱重工サーマルシステムズ株式会社 | Compressor driving motor and cooling method thereof |
-
2018
- 2018-12-17 CN CN201811541434.7A patent/CN109412351B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000146331A (en) * | 1998-11-06 | 2000-05-26 | Mitsubishi Electric Corp | Cooling device for motor for refrigerant compressor |
| CN103138488A (en) * | 2011-11-24 | 2013-06-05 | 苏州贝得科技有限公司 | Composite cooling system of three-phase asynchronous motor for semi-hermetic refrigeration compressor |
| CN103683673A (en) * | 2013-11-13 | 2014-03-26 | 华南理工大学 | Direct spray-type motor cooling system |
| CN104065208A (en) * | 2014-06-06 | 2014-09-24 | 中国科学院广州能源研究所 | Generator cooled by organic working medium |
| CN105871125A (en) * | 2015-01-21 | 2016-08-17 | 东方电气集团东方电机有限公司 | Rotary motor atomizing evaporative cooling system, motor and cooling method thereof |
| CN108870790A (en) * | 2018-08-02 | 2018-11-23 | 合肥天鹅制冷科技有限公司 | A kind of centrifugal refrigerating machines electromotor cooling system |
| CN209150916U (en) * | 2018-12-17 | 2019-07-23 | 无锡职业技术学院 | A kind of half seals the electromotor cooling system of centrifugal compressor |
Non-Patent Citations (2)
| Title |
|---|
| 电子膨胀阀在定频制冷系统上的应用;彭喜姣;;中国新技术新产品(14);55-57 * |
| 风冷式微通道冷凝器的性能拟合计算模型;商萍君;;制冷与空调(09);25-28 * |
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