CN112564356A - Motor has cooling channel's electronic scroll compressor - Google Patents
Motor has cooling channel's electronic scroll compressor Download PDFInfo
- Publication number
- CN112564356A CN112564356A CN202011184416.5A CN202011184416A CN112564356A CN 112564356 A CN112564356 A CN 112564356A CN 202011184416 A CN202011184416 A CN 202011184416A CN 112564356 A CN112564356 A CN 112564356A
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- China
- Prior art keywords
- channel
- rotor
- motor
- scroll compressor
- cooling channel
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/02—Pumps characterised by combination with or adaptation to specific driving engines or motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
- F04C29/042—Heating; Cooling; Heat insulation by injecting a fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
- F04C29/045—Heating; Cooling; Heat insulation of the electric motor in hermetic pumps
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
Abstract
An electric scroll compressor with a cooling channel in a motor comprises a motor shell consisting of a front end cover and a middle cylinder, wherein the middle cylinder is connected with the end part of the scroll compressor; the rotor is provided with a through rotor cooling channel along the axial direction, the front end cover is provided with an air inlet, air enters the air inlet channel after passing through the air inlet, the air inlet channel is communicated with the rotor cooling channel, the rotor cooling channel discharges the air through the air outlet channel, and the air outlet channel is communicated with the air suction chamber of the scroll compressor. The rotor cooling channel accelerates the gas flow, and enhances the heat exchange condition between the gas and the motor. In addition, resistance loss is generated when the gas passes through the motor, but the pressure of the gas is increased along with the rotation of the rotor under the driving of the motor shaft, so that the resistance loss is made up.
Description
Technical Field
The invention relates to the field of compressors, in particular to an electric scroll compressor with a motor provided with a cooling channel.
Background
The motor is at the operation in-process, because there is copper loss and iron loss can produce a large amount of heats, if do not carry out inside cooling to the motor, the motor can only give off the external world with heat transfer on to the casing for motor temperature risees, and the motor is overheated can accelerate winding ageing, finally breaks down. The motor adopts the inside cooling to need to set up cooling channel, and cooling gas reduces the temperature through the passageway and the motor heat transfer, and gas temperature risees and has the resistance loss. In the prior art, a circulation area is designed on a shell, and gas passes through the circulation area to achieve the purpose of heat exchange. However, the flow passage of the casing is difficult to process, and causes resistance loss and gas pressure reduction.
Disclosure of Invention
The invention aims to solve the problems that the scroll compressor in the prior art is difficult to cool and affects the gas pressure, and provides an electric scroll compressor with a cooling channel in a motor, which can effectively enhance heat exchange and reduce resistance loss.
In order to achieve the purpose, the invention has the following technical scheme:
an electric scroll compressor with a cooling channel in a motor comprises a motor shell consisting of a front end cover and a middle cylinder, wherein the middle cylinder is connected with the end part of the scroll compressor; the rotor is provided with a through rotor cooling channel along the axial direction, the front end cover is provided with an air inlet, air enters the air inlet channel after passing through the air inlet, the air inlet channel is communicated with the rotor cooling channel, the rotor cooling channel discharges the air through the air outlet channel, and the air outlet channel is communicated with the air suction chamber of the scroll compressor.
Preferably, the air inlet channel is a region between the front end cover and the stator and the rotor, the end of the air inlet channel is an inlet of a rotor cooling channel, the rotor cooling channel is a spiral channel, and the rotor cooling channels are distributed along the circumferential direction at equal angles on the cross section of the rotor.
Preferably, a centrifugal impeller is arranged at the end part of the rotor, a centrifugal impeller channel is formed in the centrifugal impeller, and the centrifugal impeller channel is connected with the rotor cooling channel; the air inlet channel is an area between the front end cover and the stator and the rotor, the tail end of the air inlet channel is an inlet of a rotor cooling channel, the rotor cooling channel is a spiral channel, the rotor cooling channel is distributed on the cross section of the rotor at equal angles along the circumferential direction, and an outlet of the centrifugal impeller channel is connected with the exhaust channel.
Preferably, a centrifugal impeller is arranged at the end part of the rotor, a centrifugal impeller channel is formed in the centrifugal impeller, and the centrifugal impeller channel is connected with the rotor cooling channel; the air inlet channel is an area between the front end cover and the stator and the rotor, the tail end of the air inlet channel is an inlet of a rotor cooling channel, the rotor cooling channel is a straight channel, the rotor cooling channel is distributed on the cross section of the rotor at equal angles along the circumferential direction, and an outlet of the centrifugal impeller channel is connected with the exhaust channel.
Preferably, the centrifugal impeller is arranged on the motor shaft or integrally cast with the rotor.
Preferably, the inlets of the rotor cooling channels are distributed at the same radius of the rotor in an equiangular manner, and the number of the rotor cooling channels is a multiple of the number of the centrifugal impeller channels.
Preferably, the air inlet is arranged in the center of the front end cover, and air enters the motor through the air inlet channel and then diffuses towards the circumferential direction.
Preferably, the base section of the rotor cooling channel is in a trapezoid, triangular or circular structure, the circular structure is that the channel section is circular, the triangular structure is convenient to process and manufacture by adopting circular arc transition at three vertexes, and the trapezoid structure is formed by two concentric circular arcs and two line segments.
Preferably, the rotor cooling channel is additionally provided with fins for enhancing the heat exchange capacity of the channel on the basic section.
Preferably, the outlet cross section of the rotor cooling channel is perpendicular to the arrangement direction of the motor shaft.
Compared with the prior art, the invention has the following beneficial effects: when the motor is connected with the scroll compressor for use, gas firstly passes through the motor and then enters the scroll compressor, and the motor is provided with a rotor cooling channel to cool the motor. The rotor cooling channel accelerates the gas flow, and enhances the heat exchange condition between the gas and the motor. In addition, resistance loss is generated when the gas passes through the motor, but the pressure of the gas is increased along with the rotation of the rotor under the driving of the motor shaft, so that the resistance loss is made up.
Furthermore, the rotor cooling channel is a spiral channel, and the centrifugal impeller is arranged to enable the centrifugal impeller channel to be connected with the rotor cooling channel, so that the centrifugal impeller can further accelerate the gas flow, enhance the heat exchange between the gas and the motor, achieve a better cooling effect, and simultaneously further enable the pressure of the gas to be increased, thereby better compensating the resistance loss of the gas.
Drawings
FIG. 1 is a schematic cross-sectional view of an embodiment 1 of the electric scroll compressor having cooling passages for the motor of the present invention;
FIG. 2 is a schematic cross-sectional view of embodiment 2 of the electric scroll compressor having cooling passages for the motor of the present invention;
FIG. 3 is a schematic cross-sectional view of embodiment 3 of the electric scroll compressor having cooling passages for the motor of the present invention;
FIG. 4 is a three-dimensional model view of embodiment 2 of the electric scroll compressor having cooling passages for the motor of the present invention;
FIG. 5 is a front view of the rotor cooling passage of the present invention as a spiral channel;
FIG. 6 is a schematic base section of a rotor cooling passage of the present invention in the form of a spiral channel;
FIG. 7 is a schematic view of a rotor cooling channel of the present invention with fins added to the base section;
in the drawings: 1-front end cover; 2-a middle cylinder; 3-a scroll compressor; 4-centrifugal impeller; 5-motor shaft; 6-a rotor; 7-a stator; 11-an intake passage; 31-an exhaust channel; 41-centrifugal impeller channel; 61-rotor cooling channels.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
An electric scroll compressor with a cooling channel for a motor comprises a front end cover 1, a middle cylinder 2, a motor shaft 5, a rotor 6, a stator 7, an air inlet channel 11, a rotor cooling channel 61 and an air outlet channel 31. The air inlet channel 11 enters from the middle opening of the front end cover 1, the air inlet channel 11 is the area between the front end cover 1 and the stator 7 and the rotor 6, the end of the air inlet channel 11 is the inlet of the rotor cooling channel 61, the rotor cooling channel 61 adopts a spiral channel, the outlet of the rotor cooling channel 61 is connected with the air exhaust channel 31, and the air exhaust channel 31 is communicated with the air suction chamber of the scroll compressor 3.
Example 2
An electric scroll compressor with a cooling channel for a motor comprises a front end cover 1, a middle cylinder 2, a centrifugal impeller 4, a motor shaft 5, a rotor 6, a stator 7, an air inlet channel 11, a rotor cooling channel 61, a centrifugal impeller channel 41 and an air outlet channel 31. The air inlet channel 11 enters from the middle opening of the front end cover 1, the air inlet channel 11 is the area between the front end cover 1 and the rotor 6 and the stator 7, the end of the air inlet channel 11 is the inlet of the rotor cooling channel 61, the rotor cooling channel 61 is a spiral channel, the outlet of the rotor cooling channel 61 is connected with the inlet of the centrifugal impeller channel 41, the centrifugal impeller 4 can share one motor shaft with the motor or can be directly and fixedly connected with the rotor 6 of the motor without the motor shaft, the outlet of the centrifugal impeller channel 41 is connected with the air exhaust channel 11, and the air exhaust channel 11 is communicated with the air suction chamber of the scroll compressor 3.
Example 3
An electric scroll compressor with a cooling channel for a motor comprises a front end cover 1, a middle cylinder 2, a centrifugal impeller 4, a motor shaft 5, a rotor 6, a stator 7, an air inlet channel 11, a rotor cooling channel 61, a centrifugal impeller channel 41 and an air outlet channel 31. The air inlet channel 11 enters from the middle opening of the front end cover 1, the air inlet channel 11 is the area between the front end cover 1 and the rotor 6 and the stator 7, the end of the air inlet channel 11 is the inlet of the rotor cooling channel 61, the rotor cooling channel 61 is an axial straight channel, the outlet of the rotor cooling channel 61 is connected with the inlet of the centrifugal impeller channel 41, the centrifugal impeller 4 can share one motor shaft with the motor or can be directly and fixedly connected with the rotor 6 of the motor without the motor shaft, the outlet of the centrifugal impeller channel 41 is connected with the exhaust channel 31, and the exhaust channel 31 is communicated with the air suction chamber of the scroll compressor 3.
The front end cover 1 of the invention is arranged at one end of the middle cylinder 2, the related components of the scroll compressor 3 are arranged at the other end of the middle cylinder 2, the center of the front end cover 1 is provided with a gas inlet, and the scroll compressor 3 is provided with a vent hole.
Referring to fig. 5, the rotor cooling channel 61 of the present invention is in the form of a spiral channel, an included angle between the direction of the spiral channel and the axial direction can theoretically range from 0 ° to 90 °, when the included angle is 0 °, the rotor cooling channel 61 is an axial straight channel, when the included angle is 90 ° as an ideal state, the rotation speed of the gas passing through the rotor cooling channel 61 is increased, heat exchange with the wall surface can be enhanced, the gas passes through the spiral channel, the pressure is increased by the rotation of the rotor 6, and the resistance loss of the gas passing through the motor can be generally compensated.
The centrifugal impeller 4 can be of a closed structure, cover plates are arranged at the front and the rear of blades of the closed structure, efficiency is high, and gas can be conveyed to the exhaust channel 31 in a directional mode. The relevant components of the scroll compressor 3 compress the gas before discharge.
Referring to fig. 6, when the rotor cooling channel 61 of the present invention is a spiral channel, the basic cross-section of the rotor cooling channel 61 may be in various forms, such as a trapezoidal structure, a triangular structure and a circular structure, the circular structure is a circular channel, the triangular structure is formed by circular arc transition at three vertexes for convenient processing and manufacturing, and the trapezoidal structure is formed by two concentric circular arcs and two line segments.
Referring to fig. 7, fins can be added to the basic section of the above structures to enhance the heat exchange condition of the channel.
The inlets of the rotor cooling channels 61 are distributed at the same radius of the rotor 6 in an equal angle, the number of the rotor cooling channels 61 is a multiple relation of the number of the centrifugal impeller channels 41, the number of the rotor cooling channels 61 should be increased as much as possible under the condition of ensuring reasonable structural strength, and the channels can be increased by several circles along the direction of a concentric circle.
The invention accelerates the gas flow through the rotor cooling channel 61, and enhances the heat exchange condition between the gas and the motor. The gas is rotated to increase the pressure and make up for the resistance loss through the spiral channel arranged on the rotor 6 and the centrifugal impeller 4.
The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, and it should be understood by those skilled in the art that the present invention can be modified and replaced by other simple modifications and replacements without departing from the spirit and principle of the present invention, and the modifications and replacements also fall within the protection scope of the appended claims.
Claims (10)
1. An electric scroll compressor having a cooling passage for a motor, comprising: the scroll compressor comprises a motor shell consisting of a front end cover (1) and a middle cylinder (2), wherein the middle cylinder (2) is connected with the end part of the scroll compressor (3), a motor shaft (5) is arranged in the motor shell, a rotor (6) is arranged on the motor shaft (5), and a stator (7) is arranged outside the rotor (6); rotor (6) on seted up through-going rotor cooling channel (61) along the axial, front end housing (1) on seted up the air inlet, gaseous entering air intake passage (11) behind the air inlet, air intake passage (11) and rotor cooling channel (61) intercommunication, rotor cooling channel (61) pass through exhaust passage (31) with gaseous exhaust, exhaust passage (31) and the room intercommunication of breathing in of scroll compressor (3).
2. The electric scroll compressor having a cooling passage for the motor of claim 1, wherein:
the air inlet channel (11) is an area between the front end cover (1) and the stator (7) and the rotor (6), the tail end of the air inlet channel (11) is an inlet of a rotor cooling channel (61), the rotor cooling channel (61) is a spiral channel, and the rotor cooling channel (61) is distributed along the circumferential direction at equal angles on the section of the rotor (6).
3. The electric scroll compressor having a cooling passage for the motor of claim 1, wherein:
the end part of the rotor (6) is provided with a centrifugal impeller (4), a centrifugal impeller channel (41) is formed in the centrifugal impeller (4), and the centrifugal impeller channel (41) is connected with a rotor cooling channel (61); the air inlet channel (11) is an area between the front end cover (1) and the stator (7) and the rotor (6), the tail end of the air inlet channel (11) is an inlet of a rotor cooling channel (61), the rotor cooling channel (61) is a spiral channel, the rotor cooling channel (61) is distributed on the section of the rotor (6) at equal angles along the circumferential direction, and an outlet of the centrifugal impeller channel (41) is connected with the exhaust channel (31).
4. The electric scroll compressor having a cooling passage for the motor of claim 1, wherein:
the end part of the rotor (6) is provided with a centrifugal impeller (4), a centrifugal impeller channel (41) is formed in the centrifugal impeller (4), and the centrifugal impeller channel (41) is connected with a rotor cooling channel (61); the air inlet channel (11) is an area between the front end cover (1) and the stator (7) and the rotor (6), the tail end of the air inlet channel (11) is an inlet of a rotor cooling channel (61), the rotor cooling channel (61) is a straight channel, the rotor cooling channel (61) is distributed on the section of the rotor (6) at equal angles along the circumferential direction, and an outlet of the centrifugal impeller channel (41) is connected with the exhaust channel (31).
5. The electric scroll compressor having a cooling passage for the motor according to claim 3 or 4, wherein: the centrifugal impeller (4) is arranged on the motor shaft (5) or integrally cast and molded with the rotor (6).
6. The electric scroll compressor having a cooling passage for the motor according to claim 3 or 4, wherein:
the inlets of the rotor cooling channels (61) are distributed at the same radius position of the rotor (6) in an equal angle mode, and the number of the rotor cooling channels (61) is a multiple relation of the number of the centrifugal impeller channels (41).
7. The electric scroll compressor having a cooling passage for the motor of claim 1, wherein: the air inlet is formed in the center of the front end cover (1), and air is diffused in the circumferential direction after entering the motor through the air inlet channel (11).
8. The electric scroll compressor having a cooling passage for the motor of claim 1, wherein: the base section of the rotor cooling channel (61) is of a trapezoid, triangular or circular structure, the circular structure is that the channel section is circular, the triangular structure is convenient to process and manufacture by adopting circular arc transition at three vertexes, and the trapezoid structure is formed by two concentric circular arcs and two line segments.
9. The electric scroll compressor having the cooling passage in the motor of claim 8, wherein:
the rotor cooling channel (61) is added with fins for enhancing the heat exchange capacity of the channel on the base section.
10. The electric scroll compressor having a cooling passage for the motor of claim 1, wherein:
the outlet section of the rotor cooling channel (61) is vertical to the arrangement direction of the motor shaft (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011184416.5A CN112564356A (en) | 2020-10-28 | 2020-10-28 | Motor has cooling channel's electronic scroll compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011184416.5A CN112564356A (en) | 2020-10-28 | 2020-10-28 | Motor has cooling channel's electronic scroll compressor |
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| Publication Number | Publication Date |
|---|---|
| CN112564356A true CN112564356A (en) | 2021-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011184416.5A Pending CN112564356A (en) | 2020-10-28 | 2020-10-28 | Motor has cooling channel's electronic scroll compressor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198340A (en) * | 2021-11-24 | 2022-03-18 | 华能重庆两江燃机发电有限责任公司 | SCR dilution fan that can start fast |
| WO2023246204A1 (en) * | 2022-06-24 | 2023-12-28 | 清华大学 | Dual-mode compressor |
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| US20200235620A1 (en) * | 2019-01-23 | 2020-07-23 | Toyota Jidosha Kabushiki Kaisha | Rotary electric machine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198340A (en) * | 2021-11-24 | 2022-03-18 | 华能重庆两江燃机发电有限责任公司 | SCR dilution fan that can start fast |
| CN114198340B (en) * | 2021-11-24 | 2023-01-20 | 华能重庆两江燃机发电有限责任公司 | SCR dilution fan that can start fast |
| WO2023246204A1 (en) * | 2022-06-24 | 2023-12-28 | 清华大学 | Dual-mode compressor |
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Application publication date: 20210326 |