CN213270358U - Mechanical draft air cooling system - Google Patents
Mechanical draft air cooling system Download PDFInfo
- Publication number
- CN213270358U CN213270358U CN202021395766.1U CN202021395766U CN213270358U CN 213270358 U CN213270358 U CN 213270358U CN 202021395766 U CN202021395766 U CN 202021395766U CN 213270358 U CN213270358 U CN 213270358U
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- Prior art keywords
- cooling system
- permanent magnet
- air cooling
- fan
- rotor
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- 238000001816 cooling Methods 0.000 title claims abstract description 68
- 238000005399 mechanical ventilation Methods 0.000 claims abstract description 38
- 239000004020 conductor Substances 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000011065 in-situ storage Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 14
- 239000000498 cooling water Substances 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008450 motivation Effects 0.000 description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Motor Or Generator Cooling System (AREA)
Abstract
The utility model discloses a mechanical ventilation air cooling system, which comprises a fan and a source motor for driving the fan; the output shaft of the source motor is connected with the rotating shaft of the fan through a permanent magnet speed regulator. When the mechanical ventilation air cooling system is used, the rotating speed of the fan shaft is changed by changing the size of the air gap in the permanent magnet speed regulator, the magnetic transmission mode is not influenced by power quality, and the mechanical ventilation air cooling system can normally work when the power quality is poor or in a low-voltage period.
Description
Technical Field
The utility model relates to a mechanical industry technical field, more specifically say, relate to a mechanical draft air cooling system.
Background
The mechanical ventilation air cooling system is a relatively common auxiliary machine circulating water cooling mode, cooling water enters an auxiliary machine heat exchanger for heat exchange, the heated cooling water is pumped into an air cooling radiator by a circulating water pump, air is sucked by a fan to accelerate the fin tube bundle of the air cooling radiator to perform surface heat exchange with the air (the cold air is sucked and flows through the outer side of the air cooling radiator so as to cool hot water in the air cooling radiator), and the cooling water is cooled by the air at the air cooling radiator and then returns to the auxiliary machine heat exchanger for cooling to form closed circulation.
In the mechanical ventilation air cooling system, a shaft of a fan is directly and fixedly connected with an output shaft of a source motor, and the rotation speed of the fan is adjusted by changing the rotation speed of the source motor. However, in the mechanical draft cooling system as above, the driving of the fan is greatly affected by the power quality, and the fan cannot normally operate during a poor power quality or a low voltage.
In addition, in the existing mechanical ventilation cooling system, the transmission mode of the fan can also generate electric power harmonic waves, and the damage is large.
In summary, how to improve the driving manner of the fan in the mechanical ventilation cooling system to ensure that the fan normally operates during the period of poor power quality or low voltage is an urgent problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a mechanical draft cooling system, including fan and the source moving machine that is used for driving the fan, the output shaft of source moving machine links to each other with the pivot of fan through permanent magnet speed regulator, changes the rotational speed of fan axle through the size that changes the air gap among the permanent magnet speed regulator, and magnetic transmission mode does not receive the influence of power quality, can both normally work during power quality is very poor or at the low pressure.
In order to achieve the above object, the utility model provides a following technical scheme:
a mechanical draft air cooling system including a fan and a source motor for driving the fan; and the output shaft of the source motor is connected with the rotating shaft of the fan through a permanent magnet speed regulator.
Preferably, in the mechanical ventilation air cooling system, the permanent magnet speed regulator includes a conductor rotor and a permanent magnet rotor, the conductor rotor is fixedly connected to the output shaft, and the permanent magnet rotor is connected to a rotating shaft of the fan.
Preferably, in the mechanical ventilation air cooling system, the conductor rotor is formed in a frame shape, and the permanent magnet rotor is located inside a frame-shaped structure formed by the conductor rotor.
Preferably, in the mechanical ventilation air cooling system, the permanent magnet rotor includes a magnetic rotor connected to a rotating shaft of the fan, permanent magnets capable of moving are respectively installed on two sides of the magnetic rotor along the axial direction, and the thickness of the permanent magnet rotor along the axial direction can be changed in the moving process of the permanent magnets; an air gap is formed between the end part of the permanent magnet rotor along the axial direction and the inner wall of the conductor rotor close to the end part.
Preferably, in the mechanical ventilation air cooling system, the permanent magnet speed regulator includes an actuator, and the actuator is controlled by an on-site control device of the mechanical ventilation air cooling system and is used for adjusting the thickness of the permanent magnet rotor in the axial direction.
Preferably, in the mechanical ventilation air cooling system, the site control device is a DCS device.
Preferably, in the mechanical ventilation air cooling system, the fan is configured to draw air to an air-cooled radiator of the mechanical ventilation air cooling system, and the air-cooled radiator is communicated with an auxiliary heat exchanger of the mechanical ventilation air cooling system to form a closed circulation loop.
Preferably, in the mechanical ventilation air cooling system, a pump is disposed on the circulation loop for driving water to circulate in the circulation loop.
The utility model provides a mechanical ventilation air cooling system, which comprises a fan and a source motor for driving the fan; the output shaft of the source motor is connected with the rotating shaft of the fan through a permanent magnet speed regulator.
The mechanical ventilation air cooling system is different from the scheme of adjusting the rotating speed of a rotating shaft of a fan by using a frequency converter in the prior art, when the mechanical ventilation air cooling system is used, the rotating speed of the shaft of the fan is changed by changing the size of an air gap in a permanent magnet speed regulator, a magnetic transmission mode is not influenced by power quality, and the mechanical ventilation air cooling system can normally work when the power quality is poor or in a low-voltage period.
Additionally, the utility model provides a mechanical draft air cooling system utilizes the transmission of permanent magnet speed regulator, can reduce the transmission of vibration, and is good to entire system's shock attenuation, and the installation is simple, also reduces the maintenance rate, and it is still little to take up an area of the space, does not need special safeguard measure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a permanent magnet speed regulator according to an embodiment of the present invention;
fig. 2 is an assembly view of a permanent magnet speed regulator and a motor according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a mechanical ventilation cooling system according to an embodiment of the present invention;
wherein, in fig. 1-3:
a motor 1; an output shaft 101; a load shaft 102; a conductor rotor 201; a magnetic rotor 202; a permanent magnet 221.
Detailed Description
The embodiment of the utility model discloses mechanical draft cooling system, including the fan with be used for driving the source motivation of fan, the output shaft of source motivation passes through permanent magnet speed regulator and links to each other with the pivot of fan, changes the rotational speed of fan axle through the size that changes air gap among the permanent magnet speed regulator, and magnetic transmission mode does not receive power quality's influence, and power quality is very poor or can both normally work during the low pressure.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, an embodiment of the present invention provides a mechanical ventilation air cooling system, which includes a fan and a source motor for driving the fan; the output shaft 101 of the source motor is connected with the rotating shaft of the fan through a permanent magnet speed regulator.
When the mechanical ventilation air cooling system is used, the rotating speed of a rotating shaft of the fan is changed by changing the size of an air gap in the permanent magnet speed regulator, the magnetic transmission mode is not influenced by power quality, and the mechanical ventilation air cooling system can normally work when the power quality is poor or in a low-voltage period.
Additionally, the embodiment of the utility model provides a mechanical ventilation air cooling system utilizes the transmission of permanent magnet speed regulator, can reduce the transmission of vibration, and is good to entire system's shock attenuation, and the installation is simple, also reduces the maintenance rate, and it is still little to take up an area of the space, does not need special safeguard measure.
In the above mechanical ventilation air cooling system, the permanent magnet speed regulator includes a conductor rotor 201 and a permanent magnet rotor, the conductor rotor 201 is fixedly connected with the output shaft 101, and the permanent magnet rotor is connected with the rotating shaft of the fan.
Specifically, in the mechanical ventilation air cooling system, the conductor rotor 201 is formed in a frame shape, and the permanent magnet rotor is located inside the frame-shaped structure formed by the conductor rotor 201. The permanent magnet rotor comprises a magnetic rotor 202 connected with a rotating shaft of the fan, permanent magnets 221 capable of moving are respectively installed on two sides of the magnetic rotor 202 along the axial direction, and the thickness of the permanent magnet rotor along the axial direction can be changed in the moving process of the permanent magnets 221; an air gap is formed between the end part of the permanent magnet rotor along the axial direction and the inner wall of the conductor rotor 201 close to the end part, and air gaps are respectively formed at the two ends of the permanent magnet rotor along the axial direction.
The permanent magnet speed regulator comprises an actuator, the actuator is controlled by an on-site control device of the mechanical ventilation air cooling system, and the actuator is used for adjusting the thickness of the permanent magnet rotor along the axial direction. The field Control device is a DCS (Distributed Control System) device.
The fan is used for sucking air to an air cooling radiator of the mechanical ventilation air cooling system, and the air cooling radiator is communicated with an auxiliary machine heat exchanger of the mechanical ventilation air cooling system to form a closed circulation loop. The fan is a draught fan.
In the mechanical ventilation air cooling system, the circulating loop is provided with a pump, and the pump is used for driving cooling water to circularly flow in the circulating loop. The source motor is a motor 1, the motor 1 is a horizontal motor, the motor 1 is placed on the outer side of the fan, an output shaft of the motor 1 is connected with a permanent magnet speed regulator to regulate the output rotating speed, a permanent magnet rotor of the permanent magnet speed regulator is provided with a load shaft 102, the load shaft 102 is connected with a speed reducer with a long shaft to the middle of the fan, and the torque is increased by the speed reducer to drive a rotating shaft of the fan to rotate. When the mechanical ventilation air cooling system is applied, cooling water enters the auxiliary heat exchanger for heat exchange, the heated cooling water is pumped into the air cooling radiator by the circulating water pump, the air is sucked by the fan to accelerate the finned tube bundle of the air cooling radiator to perform surface heat exchange with the air (the cold air is sucked and flows through the outer side of the air cooling radiator so as to cool hot water in the air cooling radiator), and the cooling water is cooled by the air and then returns to the auxiliary heat exchanger for cooling to form closed circulation.
The mechanical ventilation cooling system provided by the embodiment utilizes the permanent magnet speed regulator for transmission, and the magnetic transmission mode does not influence the power quality of the system and does not generate harmonic waves, instantaneous high voltage or other problems related to the power quality. And the permanent magnet speed regulator has high reliability and economy and simple maintenance, and is flexibly connected with the motor 1, so that the service life of the motor 1 is prolonged.
The permanent magnet rotor is made of high-performance neodymium iron boron (NdFeB), magnetic energy and coercive force are high, larger magnetic force can be generated by a smaller volume, the thickness of the permanent magnet rotor is much thinner than that of an iron oxide body, and a source motor can be made smaller. The permanent magnet speed regulator has a good vibration isolation effect, and under the condition that the rotating speed of the source motor is not changed, the permanent magnet speed regulator can change the rotating speed difference between the source motor and a load by adjusting the air gap between the conductor rotor 201 and the permanent magnet rotor, so that the output rotating speed of the permanent magnet speed regulator is adjusted, the rotating speed of the load can be adjusted to realize soft start under the condition that the rotating speed of the source motor is not changed, and the impact of the load during starting is reduced. The operation condition is simple, and the load shaft can operate when generating inclination angle and axial vibration.
The working principle of the permanent magnet speed regulator is as follows, when the conductor rotor 201 is far away from the permanent magnet rotor, the magnetic force lines passing through the conductor rotor 201 are reduced, the induction magnetic field is reduced, the transmission torque is reduced, the load rotating speed is reduced, when the conductor rotor 201 is near to the permanent magnet rotor, the number of the magnetic force lines passing through the conductor rotor 201 is increased, the induction magnetic field is increased, the output torque is increased, and the load rotating speed is increased. The conductor rotor 201 may be provided as a copper conductor rotor.
The mechanical ventilation air cooling system provided by the embodiment utilizes the permanent magnet speed regulator to change a transmission mode, so that equipment can be protected, a frequency converter cabinet is not required, the field in a power plant is saved, and the installation and maintenance are simple. Meanwhile, the mechanical ventilation air cooling system provided by the embodiment has the advantages that the running condition of the fan is simple, the rotating shaft of the fan is inclined, and the fan can run when vibrating axially.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A mechanical draft air cooling system comprising a fan and a source motor for driving the fan; an output shaft of the source motor is connected with a rotating shaft of the fan through a permanent magnet speed regulator;
the permanent magnet speed regulator comprises a conductor rotor and a permanent magnet rotor, the conductor rotor is fixedly connected with the output shaft, and the permanent magnet rotor is connected with a rotating shaft of the fan.
2. The mechanical ventilation air cooling system of claim 1, wherein the conductor rotor forms a frame shape, and the permanent magnet rotor is located inside a frame-like structure formed by the conductor rotor.
3. The mechanical ventilation air cooling system of claim 2, wherein the permanent magnet rotor includes a magnetic rotor connected to a rotating shaft of the fan, and movable permanent magnets are respectively installed on two sides of the magnetic rotor in the axial direction, and the thickness of the permanent magnet rotor in the axial direction can be changed during the movement of the permanent magnets; an air gap is formed between the end part of the permanent magnet rotor along the axial direction and the inner wall of the conductor rotor close to the end part.
4. The mechanical draft air cooling system of claim 2, wherein said permanent magnet governor includes an actuator controlled by an in-situ control of said mechanical draft air cooling system for adjusting the thickness of said permanent magnet rotor in the axial direction.
5. The mechanical draft air cooling system of claim 4, wherein said site control device is a DCS device.
6. The mechanical draft air cooling system of claim 1, wherein said fan is configured to draw air toward an air cooled radiator of said mechanical draft air cooling system, said air cooled radiator being in communication with an auxiliary heat exchanger of said mechanical draft air cooling system to form a closed circulation loop.
7. The mechanical draft air cooling system of claim 6, wherein a pump is provided on said circulation loop for driving water to circulate within said circulation loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021395766.1U CN213270358U (en) | 2020-07-15 | 2020-07-15 | Mechanical draft air cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021395766.1U CN213270358U (en) | 2020-07-15 | 2020-07-15 | Mechanical draft air cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213270358U true CN213270358U (en) | 2021-05-25 |
Family
ID=75959811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021395766.1U Active CN213270358U (en) | 2020-07-15 | 2020-07-15 | Mechanical draft air cooling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213270358U (en) |
-
2020
- 2020-07-15 CN CN202021395766.1U patent/CN213270358U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 100071 11 / F, block B, building 1, yard 6, Automobile Museum East Road, Fengtai District, Beijing Patentee after: Huadian Technology Co.,Ltd. Country or region after: China Address before: 10th Floor, Building B, Huadian Industrial Park, East Road of Automobile Museum, Fengtai District, Beijing Patentee before: HUADIAN HEAVY INDUSTRIES Co.,Ltd. Country or region before: China |