CN210599485U - Axial flow ventilation device with outer rotor permanent magnet motor and multistage impellers - Google Patents
Axial flow ventilation device with outer rotor permanent magnet motor and multistage impellers Download PDFInfo
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- CN210599485U CN210599485U CN201921617560.6U CN201921617560U CN210599485U CN 210599485 U CN210599485 U CN 210599485U CN 201921617560 U CN201921617560 U CN 201921617560U CN 210599485 U CN210599485 U CN 210599485U
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Abstract
The multi-stage impeller axial flow ventilation device of the outer rotor permanent magnet motor comprises a rectifying cylinder, a front base, a rear base, a middle air cylinder and an outer rotor permanent magnet motor, wherein the rectifying cylinder is fixedly connected with the front base, the front base is fixedly connected with the middle air cylinder, the middle air cylinder is fixedly connected with the rear base, the front base and the rear base are used for fixing the multi-stage impeller axial flow ventilation device of the outer rotor permanent magnet motor to a foundation, a front supporting disc is arranged at the front end of a motor shaft of the outer rotor permanent magnet motor, a front supporting plate is arranged on the front supporting disc, a rear supporting disc is arranged at the rear end of the motor shaft of the outer rotor permanent magnet motor, a rear supporting plate is arranged on the rear supporting disc, the outer rotor permanent magnet motor is fixed in the air cylinder through the front supporting plate and the rear supporting plate, a multi-stage impeller is mounted on the motor outer; the inner wall of the middle wind tube is provided with a plurality of guide vanes. Under the condition of the same diameter of the base, more axial fans with different powers, air volumes and air pressures can be combined by increasing or decreasing the impeller stages.
Description
Technical Field
The utility model relates to an axial flow ventilation device, especially a multistage impeller outer rotor permanent magnet motor shaft circulation ventilation device of establishing ties.
Background
The mine ventilation system is an important component part for mine and tunnel excavation, and is a basic guarantee for mine safety production, and the local fan ventilator is used for continuously conveying fresh air to the underground and tunnel working surface, diluting and removing harmful gas and dust, and guaranteeing the health and safety of operators.
The traditional local ventilator generally adopts an axial flow ventilator, and generally adopts a 2-pole motor and a disrotatory mode in order to obtain larger air volume and air pressure, so that the generated noise is up to 100-120 decibels, the noise greatly exceeds the national standard, and the physical and mental health of operating personnel is seriously influenced. Therefore, each manufacturer takes some noise reduction measures and is additionally provided with auxiliary facilities such as: the noise-abatement equipment (diffuser, muffler and diffuser tower) and sound-absorbing cotton etc. not only cause bulky, moreover because sound-absorbing cotton adheres to the dust, sound-absorbing material can become invalid in a year, even several months.
In addition, for the counter-rotating axial flow fan, because the two-stage impellers of the counter-rotating fan are close to each other and rotate in the opposite direction at a relatively high speed (2950r/min), the relative linear speed is high, the noise characteristic of the fan is greatly deteriorated, and the noise is high; and the power and efficiency of the front and rear two-stage fans are difficult to design and match, and the phenomenon of motor burning caused by large power of the rear fan often occurs. Therefore, the design of the multi-stage impeller axial flow ventilation device of the outer rotor permanent magnet motor is a technical problem to be solved at present.
Disclosure of Invention
The utility model aims to solve the technical problem that a multistage impeller axial compressor ventilation unit of external rotor permanent-magnet machine is provided.
The technical proposal of the utility model for solving the technical problem is that:
the multi-stage impeller axial flow ventilation device of the outer rotor permanent magnet motor comprises a rectifying cylinder, a front base, a rear base, a middle air cylinder and an outer rotor permanent magnet motor, wherein the rectifying cylinder is fixedly connected with the front base, the front base is fixedly connected with the middle air cylinder, the middle air cylinder is fixedly connected with the rear base, the front base and the rear base are used for fixing the multi-stage impeller axial flow ventilation device of the outer rotor permanent magnet motor to a foundation, a front supporting disc is arranged at the front end of a motor shaft of the outer rotor permanent magnet motor, a front supporting plate is arranged on the front supporting disc, a rear supporting disc is arranged at the rear end of the motor shaft of the outer rotor permanent magnet motor, a rear supporting plate is arranged on the rear supporting disc, the outer rotor permanent magnet motor is fixed in the air cylinder through the front supporting plate and the rear supporting plate, a multi-stage impeller is mounted on the motor outer; the inner wall of the middle wind tube is provided with a plurality of guide vanes.
As the utility model discloses a preferred scheme, well dryer be multisection structure, through tang flange joint between festival and the festival, a rectifying section of thick bamboo passes through tang flange joint with preceding frame, preceding frame passes through tang flange joint with an adjacent festival well dryer (12) through tang flange joint in back frame and an adjacent festival. The spigot flange ensures the coaxiality requirement of the cylinders at all levels.
As an optimized scheme of the utility model, external rotor permanent-magnet machine except motor urceolus and motor shaft, its constitution still includes stator core, stator winding and rotor magnet steel, the both ends of motor shaft are respectively through front end housing, front bearing and rear end housing, rear bearing and motor urceolus swivelling joint.
As a preferred scheme of the utility model, the middle stroke section of thick bamboo form for the connection of tile-shaped structure, the number of the piece of tile-shaped structure is 2-4.
As an optimal scheme of the utility model, stator evenly distributed on well dryer inner wall, arrange the one-level stator at every level impeller back.
The utility model discloses a principle analysis:
the noise of an axial fan is dominated by aerodynamic noise, which is divided into rotational noise proportional to the peripheral speed of the impeller to the power of 10 and eddy noise proportional to the peripheral speed of the impeller to the power of 6. Obviously, the most effective way to reduce noise is to reduce the impeller peripheral speed.
Therefore, the design of the rotating speed of the motor of the utility model is low, the rotating speed of the impeller of the ventilator is reduced from about 3000r/min to about (1500 + 2000 r/min), and the noise is greatly reduced; the driving motor adopts an outer rotor type permanent magnet motor, and a multi-stage impeller is arranged by utilizing the characteristics of the rotation of an outer cylinder and large axial space, so that higher wind pressure is obtained at lower rotating speed; the multistage impellers are coaxially installed and rotate in the same direction, and the number and the installation angle of the blades of each stage of impeller are adjusted, so that the power balance and the efficiency of each stage of impeller are optimal. For the axial flow fan with n-stage impellers, the wind pressure born by each stage of fan is lower than 1/n of the full pressure of the fan, the working environment of the impellers is improved, and the whole service life of the fan is greatly prolonged.
The utility model has the characteristics of compact structure, light weight, high efficiency, long service life and the like, under the condition of the same frame diameter, more axial flow ventilators with different air volume and air pressure can be combined by increasing and decreasing the impeller number, thereby greatly reducing the model number of the ventilator; the two oppositely-rotating motors are combined into an outer rotor permanent magnet motor, and the low-speed and multi-stage series impellers are adopted, so that the wind volume is large, the wind pressure is high, the noise is low, and the power density is higher.
Drawings
FIG. 1 is a structural view of the multistage axial flow ventilator of the present invention;
FIG. 2 is a right side view of FIG. 1;
FIG. 3 is a block diagram of an outer rotor permanent magnet motor;
FIG. 4 is a schematic view of the connection of the duct components;
FIG. 5 is a schematic view of a guide vane assembly configuration;
in the figure: 1. the rotor comprises a fairing, 2 bolts, 3 front supporting sheets, 4 front supporting discs, 5 impellers, 6 outer rotor permanent magnet motors, 7 guide vanes, 8 rear supporting sheets, 9 rear supporting discs, 10 rectifying cylinders, 11 front engine bases, 12 middle wind cylinders, 13 connecting bolts, 14 rear engine bases, 15 front end covers, 16 front bearings, 17 stator windings, 18 motor outer cylinders, 19 rotor magnetic steel, 20 stator iron cores, 21 motor shafts, 22 rear end covers, 23 rear bearings and 24 spigot flanges.
Detailed Description
A multi-stage impeller axial flow ventilation device of an outer rotor permanent magnet motor comprises a rectifying cylinder 10, a front base 11, a rear base 14, an inner cylinder 12 and an outer rotor permanent magnet motor 6, wherein the rectifying cylinder 10 is fixedly connected with the front base 11, the front base 11 is fixedly connected with the inner cylinder 12, the inner cylinder 12 is fixedly connected with the rear base 14, the front base 11 and the rear base 14 are used for fixing the multi-stage impeller axial flow ventilation device of the outer rotor permanent magnet motor to a foundation, a front supporting plate 4 is arranged at the front end of a motor shaft 21 of the outer rotor permanent magnet motor 6, a front supporting plate 3 is arranged on the front supporting plate 4, a rear supporting plate 8 is arranged at the rear end of the motor shaft 21 of the outer rotor permanent magnet motor 6, a rear supporting plate 9 is arranged on the rear supporting plate 8, the outer rotor permanent magnet motor 6 is fixed in the air cylinder through the front supporting plate 3 and the rear supporting plate 9, the multi-stage impeller, the impeller 5 rotates along with the motor outer cylinder 18 to generate wind flow; a plurality of guide vanes 7 are arranged on the inner wall of the middle wind cylinder 12.
The middle wind tube 12 is of a multi-section structure, the sections are connected through a spigot flange 24, the rectifying tube 10 is connected with the front base 11 through the spigot flange 24, the front base 11 is connected with the wind tube 12 in the adjacent section through the spigot flange 24, and the rear base 14 is connected with the wind tube 12 in the adjacent section through the spigot flange 24. The spigot flange 24 ensures the coaxiality requirement of the cylinders at all levels.
The outer rotor permanent magnet motor 6 comprises a stator iron core 20, a stator winding 17 and rotor magnetic steel 19 besides a motor outer cylinder 18 and a motor shaft 21, wherein two ends of the motor shaft 21 are respectively and rotationally fixed with the motor outer cylinder 18 through a front end cover 15, a front bearing 16, a rear end cover 22 and a rear bearing 23.
The middle chimney 12 is formed by connecting tile-shaped structures, and the number of the tile-shaped structures is 2-4.
The guide vanes 7 are uniformly distributed on the inner wall of the middle wind cylinder 12, and a stage of guide vane is arranged behind each stage of impeller 5.
Claims (5)
1. A multi-stage impeller axial flow ventilation device of an outer rotor permanent magnet motor comprises a rectifying cylinder (10), a front base (11), a rear base (14), an intermediate wind cylinder (12) and an outer rotor permanent magnet motor (6), wherein the rectifying cylinder (10) is fixedly connected with the front base (11), the front base (11) is fixedly connected with the intermediate wind cylinder (12), the intermediate wind cylinder (12) is fixedly connected with the rear base (14), the front base (11) and the rear base (14) are used for fixing the multi-stage impeller axial flow ventilation device of the outer rotor permanent magnet motor to a foundation, and the multi-stage impeller axial flow ventilation device is characterized in that a front supporting disc (4) is arranged at the front end of a motor shaft (21) of the outer rotor permanent magnet motor (6), a front supporting plate (3) is arranged on the front supporting disc (4), a rear supporting disc (8) is arranged at the rear end of the motor shaft (21) of the outer rotor permanent magnet motor (6), and a rear, the outer rotor permanent magnet motor (6) is fixed in the wind barrel through a front supporting sheet (3) and a rear supporting sheet (9), a multi-stage impeller (5) is installed on a motor outer barrel (18) of the outer rotor permanent magnet motor (6) in series, and the impeller (5) rotates along with the motor outer barrel (18) to generate wind flow; the inner wall of the middle wind cylinder (12) is provided with a plurality of guide vanes (7).
2. The multi-stage impeller axial flow ventilation device of the outer rotor permanent magnet motor as claimed in claim 1, wherein the middle wind barrel (12) is of a multi-section structure, the sections are connected through a spigot flange (24), the rectifying barrel (10) is connected with the front base (11) through the spigot flange (24), the front base (11) is connected with the middle wind barrel (12) of the adjacent section through the spigot flange (24), and the rear base (14) is connected with the middle wind barrel (12) of the adjacent section through the spigot flange (24).
3. The axial flow ventilation device of the multi-stage impeller of the outer rotor permanent magnet motor according to claim 1, wherein the outer rotor permanent magnet motor (6) comprises a stator core (20), a stator winding (17) and rotor magnetic steel (19) in addition to the motor outer cylinder (18) and the motor shaft (21), and two ends of the motor shaft (21) are respectively fixed with the motor outer cylinder (18) in a rotating manner through a front end cover (15), a front bearing (16), a rear end cover (22) and a rear bearing (23).
4. The multi-stage impeller axial flow ventilation device of the outer rotor permanent magnet motor, as recited in claim 1, wherein said middle wind tunnel (12) is formed by connecting tile-shaped structures, and the number of the tile-shaped structures is 2-4.
5. The axial flow ventilation device of the multi-stage impeller of the outer rotor permanent magnet motor is characterized in that the guide vanes (7) are uniformly distributed on the inner wall of the middle air duct (12), and a stage of guide vane is arranged behind each stage of impeller (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921617560.6U CN210599485U (en) | 2019-09-26 | 2019-09-26 | Axial flow ventilation device with outer rotor permanent magnet motor and multistage impellers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921617560.6U CN210599485U (en) | 2019-09-26 | 2019-09-26 | Axial flow ventilation device with outer rotor permanent magnet motor and multistage impellers |
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| Publication Number | Publication Date |
|---|---|
| CN210599485U true CN210599485U (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921617560.6U Active CN210599485U (en) | 2019-09-26 | 2019-09-26 | Axial flow ventilation device with outer rotor permanent magnet motor and multistage impellers |
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| CN (1) | CN210599485U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500298A (en) * | 2019-09-26 | 2019-11-26 | 华北重型装备制造有限公司 | Outer-rotor permanent magnet motor multi-stage impeller axis circulation wind apparatus |
-
2019
- 2019-09-26 CN CN201921617560.6U patent/CN210599485U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500298A (en) * | 2019-09-26 | 2019-11-26 | 华北重型装备制造有限公司 | Outer-rotor permanent magnet motor multi-stage impeller axis circulation wind apparatus |
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