CN215805305U - Magnetic suspension centrifuge air-blower - Google Patents
Magnetic suspension centrifuge air-blower Download PDFInfo
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- CN215805305U CN215805305U CN202121879186.4U CN202121879186U CN215805305U CN 215805305 U CN215805305 U CN 215805305U CN 202121879186 U CN202121879186 U CN 202121879186U CN 215805305 U CN215805305 U CN 215805305U
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Abstract
The utility model relates to the field of air blowers, in particular to an air blower of a magnetic suspension centrifugal machine. The blower comprises a casing, a diffuser, a rear end cover, a motor shaft and a magnetic bearing device; the diffuser and the rear end cover are respectively fixed on the front end surface and the rear end surface of the casing, and the casing is fixedly provided with a stator seat, a front protection bearing seat, a rear protection bearing seat, a front radial bearing seat, a rear radial bearing seat and an axial bearing seat; a blower impeller is fixedly arranged on a motor shaft, and a sealing device is arranged between the back of the blower impeller and the end surface of the diffuser; a first channel is arranged between the front protection bearing seat and the diffuser, and the front radial bearing seat is provided with a second channel and a third channel communicated with the outside; one end of the first channel is communicated with the back of the air blowing impeller and the tail end of the sealing device, and the other end of the first channel, the second channel and the third channel are sequentially communicated to form a heat dissipation channel. The blower is provided with a heat dissipation channel at the back of the blower impeller to discharge hot air to the outside of the blower, thereby reducing the temperature at the position of the protective bearing and preventing the damage of the protective bearing.
Description
Technical Field
The utility model relates to the field of air blowers, in particular to an air blower of a magnetic suspension centrifugal machine.
Background
The blower is a mechanical device for conveying gas, and is widely applied to various fields of metallurgy, chemical industry, chemical fertilizer, petrifaction, food, building materials, petroleum, mines, textile, gas stations, pneumatic conveying, sewage treatment and the like. With the development of the air blower technology, the centrifugal air blower based on the magnetic suspension technology is produced, and the centrifugal air blower based on the magnetic suspension technology has the performance characteristics of energy conservation, high efficiency and the like, and has better application prospect.
The Chinese patent application (publication No. CN113027819A, published as 20210625) discloses an active air cooling system and an air cooling method for a magnetic suspension centrifugal blower, and the active air cooling system comprises a volute, an impeller, a casing rear cover, a rotor assembly, a motor stator and a magnetic suspension stator assembly, wherein the front end of the casing is connected with the volute, the rear end of the casing is provided with the casing rear cover, the rotor assembly, the motor stator and the magnetic suspension stator assembly are all arranged in an inner cavity of the casing, the impeller is arranged in the volute, the front end of the rotor assembly is coaxially connected with the impeller, the casing rear cover is provided with an air inlet, the side wall of the front end of the casing is provided with an air outlet, the motor stator and the magnetic suspension stator assembly are both provided with mutually communicated air vents, and the air inlet is communicated with the air outlet through the air inlet of the magnetic suspension stator assembly and the motor stator. The active air cooling system and the method do not need external parts such as external heat dissipation equipment, a water cooling pipeline or a heat exchanger, the traditional external passive heat dissipation is changed into internal active heat dissipation, the heat dissipation efficiency of the motor rotor is improved, the heat dissipation cost is reduced, and the heat dissipation system is maintenance-free and high in reliability.
The prior art has the following defects: the pressure of the working cavity of the impeller is higher, so that a small amount of hot gas can pass through a sealing device between the back of the blower impeller and the diffuser, enter the motor and cannot be discharged; resulting in heat accumulation between the blower impeller and the front protective bearing seat, which in turn causes damage to the protective bearing due to the higher temperature.
Disclosure of Invention
The purpose of the utility model is: in order to solve the problems, a magnetic suspension centrifuge blower is provided, in which a heat dissipation channel is arranged at the back of a blower impeller to discharge hot air to the outside of the blower, so that the temperature of a protective bearing is reduced and the bearing is prevented from being damaged.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a magnetic suspension centrifuge blower comprises a casing, a diffuser, a rear end cover, a motor shaft and a magnetic bearing device; the diffuser and the rear end cover are respectively fixed on the front end surface and the rear end surface of the casing, and the casing is fixedly provided with a stator seat, a front protection bearing seat, a rear protection bearing seat, a front radial bearing seat, a rear radial bearing seat and an axial bearing seat; a blower impeller is fixedly arranged on a motor shaft, and a sealing device is arranged between the back of the blower impeller and the end surface of the diffuser; a first channel is arranged between the front protection bearing seat and the diffuser, and the front radial bearing seat is provided with a second channel and a third channel communicated with the outside; one end of the first channel is communicated with the back of the air blowing impeller and the tail end of the sealing device, and the other end of the first channel, the second channel and the third channel are sequentially communicated to form a heat dissipation channel.
Preferably, the motor shaft is also fixedly provided with a heat dissipation impeller, and the air blowing impeller and the heat dissipation impeller are respectively positioned on two end faces of the motor shaft; the rear end cover is provided with a fourth channel communicated with the outside, the shell is provided with an axial fifth channel, and the axial bearing seat is provided with an axial sixth channel; the heat dissipation impeller is located in the fourth channel, and the fourth channel, the inner hole of the machine shell, the fifth channel, the sixth channel, the second channel and the third channel are sequentially communicated to form a second heat dissipation channel.
Preferably, the heat radiation impeller is provided with a screw hole which penetrates through the heat radiation impeller in the axial direction, the end face of the motor shaft is provided with a threaded hole, and the screw penetrates through the screw hole and is screwed with the threaded hole.
Preferably, the rear radial bearing seat is provided with a seventh channel which penetrates through the rear radial bearing seat in the axial direction, and a motor stator is fixedly arranged in the stator seat; the motor stator is provided with a stator gap which penetrates axially, and the shell is provided with a ventilation opening which is communicated with the outside in the radial direction; the fourth channel, the inner hole of the machine shell, the seventh channel, the stator gap and the ventilation opening are communicated in sequence to form a third heat dissipation channel.
Preferably, the rear protection bearing seat is provided with an eighth channel which penetrates axially, and the rear radial bearing seat is also provided with a ninth channel; one end of the ninth channel is communicated with the seventh channel, and the other end of the ninth channel is communicated with the eighth channel through an inner hole of the rear radial bearing seat; the fourth channel, the inner hole of the machine shell, the eighth channel, the inner hole of the rear radial bearing seat, the ninth channel, the seventh channel, the stator gap and the ventilation opening are communicated in sequence to form a fourth heat dissipation channel.
Preferably, the magnetic bearing device comprises a front radial magnetic bearing, a rear radial magnetic bearing and an axial magnetic bearing, wherein the front radial magnetic bearing, the rear radial magnetic bearing and the axial magnetic bearing are respectively fixed in a front radial bearing seat, a rear radial bearing seat and an axial bearing seat; the motor shaft is fixedly provided with a front radial bearing rotor, a rear radial bearing rotor and a thrust disc, the front radial bearing and the rear radial bearing rotor respectively correspond to the front radial bearing rotor and the rear radial bearing rotor in position, and the limiting parts of the axial magnetic bearing are respectively positioned at the two axial ends of the thrust disc.
Preferably, the axial magnetic bearing is provided with a bearing channel which penetrates in the radial direction, and the axial bearing seat is provided with a thrust disc channel; one end of the bearing channel is aligned with the radial outer side of the thrust disc, and the other end of the bearing channel is communicated with the sixth channel through the thrust disc channel; the bearing channel, the thrust disc channel, the sixth channel, the second channel and the third channel are communicated in sequence to form a fifth heat dissipation channel.
Preferably, the front radial bearing seat is provided with a tenth channel along the radial direction, one end of the tenth channel is communicated with the inner hole of the front radial bearing seat, and the other end of the tenth channel is communicated with the second channel; and the tenth channel, the second channel and the third channel are communicated to form a sixth heat dissipation channel.
Preferably, the tenth passage is radially aligned with the third passage.
Preferably, the front protection bearing seat and the rear protection bearing seat are internally provided with protection bearings, the outer rings of the protection bearings are in interference fit with the inner holes of the front protection bearing seat and the rear protection bearing seat respectively, and a gap exists between the inner ring of the protection bearing and the outer wall of the motor shaft at the corresponding position.
The magnetic suspension centrifuge blower adopting the technical scheme has the advantages that:
a small amount of hot gas passes through a sealing device between the back of the blower impeller and the diffuser, enters the blower, then sequentially passes through a heat dissipation channel formed by the first channel, the second channel and the third channel to flow, and is discharged out of the blower through the third channel; therefore, heat accumulation between the blast impeller and the front protection bearing seat is avoided, the temperature of the protection bearing is reduced to prevent the protection bearing from being damaged, and the service life of the protection bearing is prolonged.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of a heat dissipation channel.
Fig. 3 is a schematic structural view of a seventh passage and a ninth passage.
20-sealing device.
Detailed Description
The following describes in detail embodiments of the present invention with reference to the drawings.
Example 1
1-3, the blower comprises a casing 1, a diffuser 2, a rear end cover 3, a motor shaft 4 and a magnetic bearing device 5; the diffuser 2 and the rear end cover 3 are respectively fixed on the front end surface and the rear end surface of the casing 1, and the casing 1 is fixedly provided with a stator seat 11, a front protection bearing seat 12, a rear protection bearing seat 13, a front radial bearing seat 14, a rear radial bearing seat 15 and an axial bearing seat 16; the motor shaft 4 is fixedly provided with an air blowing impeller 41, and a sealing device is arranged between the back of the air blowing impeller 41 and the end surface of the diffuser 2; a first channel 61 is arranged between the front protective bearing seat 12 and the diffuser 2, and the front radial bearing seat 14 is provided with a second channel 62 and a third channel 63 communicated with the outside; one end of the first channel 61 is communicated with the back of the blower impeller 41 and the tail end of the sealing device, and the other end of the first channel 61, the second channel 62 and the third channel 63 are sequentially communicated to form a heat dissipation channel. In this way, a small amount of hot gas enters the blower through the sealing device between the back of the blower impeller and the diffuser, then flows through the heat dissipation channels formed by the first channel 61, the second channel 62 and the third channel 63 in sequence, and is discharged out of the blower through the third channel 63; therefore, heat accumulation between the blast impeller 41 and the front protection bearing seat 12 is avoided, the temperature of the protection bearing is reduced to prevent the protection bearing from being damaged, and the service life of the protection bearing is prolonged.
The motor shaft 4 is also fixedly provided with a heat dissipation impeller 42, and the blast impeller 41 and the heat dissipation impeller 42 are respectively positioned on two end faces of the motor shaft 4; the rear end cover 3 is provided with a fourth channel 71 communicated with the outside, the machine shell 1 is provided with an axial fifth channel 72, and the axial bearing seat 16 is provided with an axial sixth channel 73; the heat dissipation impeller 42 is located in the fourth channel 71, and the fourth channel 71, the inner hole of the casing 1, the fifth channel 72, the sixth channel 73, the second channel 62 and the third channel 63 are sequentially communicated to form a second heat dissipation channel, so as to cool the rear end protection bearing, the rear radial magnetic bearing, the motor stator, the axial magnetic bearing and the front radial magnetic bearing.
The heat dissipation impeller 42 is provided with a screw hole that penetrates axially, the end surface of the motor shaft 4 is provided with a threaded hole, and a screw passes through the screw hole and is screwed with the threaded hole so as to fix the heat dissipation impeller 42 to the end surface of the motor shaft 4.
The rear radial bearing seat 15 is provided with a seventh channel 81 which axially penetrates through, and a motor stator 17 is fixedly arranged in the stator seat 11; the motor stator 17 is provided with a stator gap which penetrates through the motor stator in the axial direction, and the shell 1 is provided with a ventilation opening 18 which is communicated with the outside in the radial direction; the fourth channel 71, the inner hole of the machine shell 1, the seventh channel 81, the stator gap and the ventilation opening 18 are sequentially communicated to form a third heat dissipation channel so as to cool the rear-end protection bearing, the rear radial magnetic bearing and the motor stator.
The rear protection bearing seat 13 is provided with an eighth channel 19 which axially penetrates through, and the rear radial bearing seat 15 is also provided with a ninth channel 91; one end of the ninth channel 91 is communicated with the seventh channel 81, and the other end of the ninth channel 91 is communicated with the eighth channel 19 through an inner hole of the rear radial bearing seat 15; the fourth channel 71, the inner hole of the machine shell 1, the eighth channel 19, the inner hole of the rear radial bearing seat 15, the ninth channel 91, the seventh channel 81, the stator gap and the ventilation opening 18 are sequentially communicated to form a fourth heat dissipation channel so as to cool the rear end protection bearing, the rear radial magnetic bearing and the motor stator.
The magnetic bearing device 5 comprises a front radial magnetic bearing 51, a rear radial magnetic bearing 52 and an axial magnetic bearing 53, wherein the front radial magnetic bearing 51, the rear radial magnetic bearing 52 and the axial magnetic bearing 53 are respectively fixed in the front radial bearing seat 14, the rear radial bearing seat 15 and the axial bearing seat 16; the motor shaft 4 is fixedly provided with a front radial bearing rotor, a rear radial bearing rotor and a thrust disc 43, the front radial magnetic bearing 51 and the rear radial magnetic bearing 52 respectively correspond to the front radial bearing rotor and the rear radial bearing rotor, and the limiting parts of the axial magnetic bearing 53 are respectively positioned at the two axial ends of the thrust disc 43. The front radial magnetic bearing 51 and the rear radial magnetic bearing 52 realize radial support of the motor shaft 4 by supporting the front radial bearing rotor and the rear radial bearing rotor, and the limit part of the axial magnetic bearing 53 realizes axial limit of the motor shaft 4 by controlling the axial position of the thrust disc 43.
The axial magnetic bearing 53 is provided with a bearing passage 54 which penetrates radially, and the axial bearing block 16 is provided with a thrust disc passage 161; one end of bearing channel 54 is aligned with the radially outer side of thrust disc 43, and the other end of bearing channel 54 communicates with sixth channel 73 through thrust disc channel 161; the bearing channel 54, the thrust disc channel 161, the sixth channel 73, the second channel 62 and the third channel 63 are sequentially communicated to form a fifth heat dissipation channel so as to cool the position of the thrust disc 43.
The front radial bearing seat 14 is provided with a tenth channel 141 along the radial direction, one end of the tenth channel 141 is communicated with the inner hole of the front radial bearing seat 14, and the other end of the tenth channel 141 is communicated with the second channel 62; the tenth passage 141, the second passage 62 and the third passage 63 are communicated to form a sixth heat dissipation passage to cool the front radial magnetic bearing 51. The tenth passage 141 is radially aligned with the third passage 63.
The front protection bearing seat 12 and the rear protection bearing seat 13 are internally provided with a protection bearing 10, the outer ring of the protection bearing 10 is in interference fit with the inner holes of the front protection bearing seat 12 and the rear protection bearing seat 13 respectively, and a gap exists between the inner ring of the protection bearing 10 and the outer wall of the motor shaft 4 at the corresponding position. When the equipment is suddenly powered off or stopped, the front radial magnetic bearing 51, the rear radial magnetic bearing 52 and the axial magnetic bearing 53 lose magnetic force and can not support and limit the motor shaft 4, and at the moment, the motor shaft 4 falls down and is in contact with the inner ring of the protective bearing 10 and supported by the protective bearing 10; thereby avoiding the damage of important parts such as the front radial magnetic bearing 51, the rear radial magnetic bearing 52 and the axial magnetic bearing 53 caused by the sudden falling of the motor shaft 4 when the motor is suddenly powered off or stopped.
Claims (10)
1. A magnetic suspension centrifuge blower is characterized in that the blower comprises a casing (1), a diffuser (2), a rear end cover (3), a motor shaft (4) and a magnetic bearing device (5); the diffuser (2) and the rear end cover (3) are respectively fixed on the front end face and the rear end face of the casing (1), and the casing (1) is fixedly provided with a stator seat (11), a front protection bearing seat (12), a rear protection bearing seat (13), a front radial bearing seat (14), a rear radial bearing seat (15) and an axial bearing seat (16); a blower impeller (41) is fixedly arranged on the motor shaft (4), and a sealing device is arranged between the back of the blower impeller (41) and the end surface of the diffuser (2); a first channel (61) is arranged between the front protective bearing seat (12) and the diffuser (2), and a second channel (62) and a third channel (63) communicated with the outside are arranged on the front radial bearing seat (14); one end of the first channel (61) is communicated with the back of the air blowing impeller (41) and the tail end of the sealing device, and the other end of the first channel (61), the second channel (62) and the third channel (63) are communicated in sequence to form a heat dissipation channel.
2. The blower of the magnetic suspension centrifuge as claimed in claim 1, wherein the motor shaft (4) is further fixedly provided with a heat dissipation impeller (42), and the blower impeller (41) and the heat dissipation impeller (42) are respectively located on two end faces of the motor shaft (4); the rear end cover (3) is provided with a fourth channel (71) communicated with the outside, the machine shell (1) is provided with an axial fifth channel (72), and the axial bearing seat (16) is provided with an axial sixth channel (73); the heat dissipation impeller (42) is positioned in the fourth channel (71), and the fourth channel (71), the inner hole of the machine shell (1), the fifth channel (72), the sixth channel (73), the second channel (62) and the third channel (63) are communicated in sequence to form a second heat dissipation channel.
3. The blower of the magnetic suspension centrifuge as claimed in claim 2, characterized in that the heat-dissipating impeller (42) is provided with screw bores running axially through it, and the end face of the motor shaft (4) is provided with threaded bores through which screws pass and which engage with the threaded bores in a screwing manner.
4. The blower of the magnetic suspension centrifuge as claimed in claim 2, characterized in that the rear radial bearing block (15) is provided with a seventh channel (81) running through axially, and a motor stator (17) is fixedly arranged in the stator block (11); the motor stator (17) is provided with a stator gap which penetrates through the motor stator in the axial direction, and the shell (1) is provided with a ventilation opening (18) which is communicated with the outside in the radial direction; the fourth channel (71), the inner hole of the machine shell (1), the seventh channel (81), the stator gap and the ventilation opening (18) are communicated in sequence to form a third heat dissipation channel.
5. A magnetic suspension centrifuge blower according to claim 2, characterised in that the rear protective bearing block (13) is provided with an eighth channel (19) running through axially, the rear radial bearing block (15) being further provided with a ninth channel (91); one end of the ninth channel (91) is communicated with the seventh channel (81), and the other end of the ninth channel (91) is communicated with the eighth channel (19) through an inner hole of the rear radial bearing seat (15); the fourth channel (71), the inner hole of the machine shell (1), the eighth channel (19), the inner hole of the rear radial bearing seat (15), the ninth channel (91), the seventh channel (81), the stator gap and the ventilation opening (18) are communicated in sequence to form a fourth heat dissipation channel.
6. The blower according to claim 1, characterised in that the magnetic bearing means (5) comprise a front radial magnetic bearing (51), a rear radial magnetic bearing (52) and an axial magnetic bearing (53), the front radial magnetic bearing (51), the rear radial magnetic bearing (52) and the axial magnetic bearing (53) being fixed in the front radial bearing seat (14), the rear radial bearing seat (15) and the axial bearing seat (16), respectively; a front radial bearing rotor, a rear radial bearing rotor and a thrust disc (43) are fixedly arranged on the motor shaft (4), the front radial magnetic bearing (51) and the rear radial magnetic bearing (52) respectively correspond to the front radial bearing rotor and the rear radial bearing rotor in position, and the limiting parts of the axial magnetic bearing (53) are respectively positioned at the two axial ends of the thrust disc (43).
7. A magnetic levitation centrifuge blower according to claim 2 or 6, characterised in that the axial magnetic bearing (53) is provided with a radially through-going bearing channel (54), the axial bearing block (16) being provided with a thrust disc channel (161); one end of the bearing channel (54) is aligned with the radial outer side of the thrust disc (43), and the other end of the bearing channel (54) is communicated with the sixth channel (73) through a thrust disc channel (161); the bearing channel (54), the thrust disc channel (161), the sixth channel (73), the second channel (62) and the third channel (63) are communicated in sequence to form a fifth heat dissipation channel.
8. The blower of the magnetic suspension centrifugal machine according to claim 1, characterized in that the front radial bearing seat (14) is provided with a tenth channel (141) along the radial direction, one end of the tenth channel (141) is communicated with the inner hole of the front radial bearing seat (14), and the other end of the tenth channel (141) is communicated with the second channel (62); the tenth channel (141), the second channel (62) and the third channel (63) are communicated to form a sixth heat dissipation channel.
9. The magnetic levitation centrifuge blower according to claim 8, wherein the tenth channel (141) is radially aligned with the third channel (63).
10. The magnetic suspension centrifuge blower according to claim 1, characterized in that the front protection bearing seat (12) and the rear protection bearing seat (13) are both provided with a protection bearing (10), the outer ring of the protection bearing (10) is in interference fit with the inner holes of the front protection bearing seat (12) and the rear protection bearing seat (13), and a gap exists between the inner ring of the protection bearing (10) and the outer wall of the motor shaft (4) at the corresponding position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121879186.4U CN215805305U (en) | 2021-08-11 | 2021-08-11 | Magnetic suspension centrifuge air-blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121879186.4U CN215805305U (en) | 2021-08-11 | 2021-08-11 | Magnetic suspension centrifuge air-blower |
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| Publication Number | Publication Date |
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| CN215805305U true CN215805305U (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121879186.4U Active CN215805305U (en) | 2021-08-11 | 2021-08-11 | Magnetic suspension centrifuge air-blower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023015737A1 (en) * | 2021-08-11 | 2023-02-16 | 鑫磊压缩机股份有限公司 | Blower of magnetic levitation centrifuge |
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2021
- 2021-08-11 CN CN202121879186.4U patent/CN215805305U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023015737A1 (en) * | 2021-08-11 | 2023-02-16 | 鑫磊压缩机股份有限公司 | Blower of magnetic levitation centrifuge |
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