Vertical type direct connection draught fan

A direct-connected, vertical technology, used in electromechanical devices, mechanical equipment, non-variable-capacity pumps, etc., can solve the problems of low speed, low efficiency, and low pressure ratio of the prime mover motor, and achieve low starting current, fewer components, The effect of increasing the magnetic flux density

Inactive Publication Date: 2017-05-10
BEIJING LIANGMING TONGCHUANG WATER TREATMENT EQUIP DEV CENT +2
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AI-Extracted Technical Summary

Problems solved by technology

However, because the current fans are powered by 50HZ AC power supply, the speed of the prime mover motor is low, causing the existing fans to work at low speeds, resulting in low efficiency, large volume, and small pressure ratio. In the case ...
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Method used

The magnetizer makes the magnetic field on the other side of the stator coil produce a circuit, increases the magnetic flux density in the stator coil 22, and this loop of the magnetizer rotates synchronously with the permanent magnet rotor, eliminates the resistance torque that the magnetic force line produces, also eliminates the guide The alternating magnetic field is generated in the magnet circuit, and at the same time, the high-frequency heating is greatly reduced, so that the permanent magnet rotor can rotate efficiently and at high speed. The impeller adopts an efficient three-dimensional curved surface impeller, and the smaller diameter is more convenient for high-speed work.
The present invention adopts mechanical bearing, vertical installation, and direct-current br...
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Abstract

The invention discloses a vertical type direct connection draught fan. The vertical type direct connection draught fan mainly comprises a shaft, a bearing, a three-dimensional curved surface impeller, a permanent magnet rotor, a stator coil without an iron core and an impeller shell. The shaft is installed on the impeller shell through the bearing. The permanent magnet rotor, the impeller and the shaft are fixedly connected. The stator coil and the impeller shell are fixedly connected. The impeller is arranged in the impeller shell. The stator coil is coupled to the permanent magnet rotor. A magnetizer is further installed on the other side, symmetrical to the permanent magnet rotor, of the stator coil. A brushless direct current motor and the impeller are integrally and vertically installed, so that the gravity of the impeller and the rotor is balanced to the lifting force produced by the three-dimensional impeller during working, and the axial force on the bearing is reduced to the greatest extent. The vertical type direct connection draught fan is used in cooperation with a brushless motor driver, the starting current is small, the power factor is high, and the motor efficiency is improved. The coil directly drives the rotor, a high-speed coupler is omitted through the rotor and the impeller, the cost is reduced, the system efficiency is improved, and the weight is reduced. The vertical type direct connection draught fan has the advantages of having a few components and being small in size and is simple and compact in structure.

Application Domain

Technology Topic

ImpellerMotor efficiency +9

Image

  • Vertical type direct connection draught fan
  • Vertical type direct connection draught fan
  • Vertical type direct connection draught fan

Examples

  • Experimental program(6)

Example Embodiment

[0033] Embodiment 1 The permanent magnet rotor is distributed axially, and the fan is arranged vertically.
[0034] See figure 1 , The permanent magnet rotor 21 and the stator coil 22 are distributed in an axial manner. The permanent magnets of the permanent magnet rotor are arranged around the axis along the axis, and the stator coils corresponding to the permanent magnet rotor are also arranged around the axis along the axis. , That is, the permanent magnet rotor and the stator coil are both cylindrical; a magnet tube 23 is arranged outside the stator coil symmetrical to the permanent magnet rotor, and the permanent magnet rotor 21, the stator coil 22 and the magnet tube 23 are placed on the body of the impeller 31 In the cavity of, the magnet barrel 23 is fixedly connected with the impeller body and rotates with the shaft. In addition, the positions of the permanent magnet rotor 21 and the magnet barrel 23 can be interchanged.
[0035] A limit roller 15 is arranged between the upper end of the shaft and the limit block 14; another set of limit blocks 14 and a limit roller 15 are arranged at the lower end of the shaft.
[0036] The magnetizer causes the magnetic field on the other side of the stator coil to generate a loop, increasing the magnetic flux density in the stator coil 22, and the loop of the magnetizer rotates synchronously with the permanent magnet rotor, eliminating the resistance torque generated by the magnetic lines of force, and also eliminating the loop of the magnetizer The alternating magnetic field is generated, and high-frequency heating is greatly reduced, so that the permanent magnet rotor can rotate at high efficiency and high speed. The impeller adopts an efficient three-dimensional curved impeller, and the smaller diameter is more convenient for high-speed work.
[0037] The experimental results show that the speed can reach more than 35000rpm, and the wind pressure ratio can reach more than 2.5.

Example Embodiment

[0038] Embodiment 2 The permanent magnet rotors are distributed radially, and this embodiment is arranged vertically.
[0039] See figure 2 The basic structure of the impeller, shaft and impeller shell is similar to that of the first embodiment. The special feature is that the permanent magnet rotors are distributed radially, and the permanent magnet rotors are arranged in the radial direction of the shaft. The permanent magnet rotors are disk-shaped, and the permanent magnet rotor disks Place behind the impeller. Corresponding stator coils are concentrated windings, which are also arranged around the shaft in the radial direction of the shaft. This structure is suitable for fans with large torque and lower speed.
[0040] Experimental results show that the speed can reach more than 15000 rpm. The wind pressure ratio can reach above 1.5.

Example Embodiment

[0041] Example 3
[0042] See image 3 , The basic structure is similar to the second embodiment, the special feature is: the stator coil is also in the shape of a flat disk, and a magnet disk 23 is provided on the other side of the stator coil symmetrical to the permanent magnet rotor, and the magnet disk is fixed to the shaft In connection, the stator coil 22 is interposed between the permanent magnet rotor 21 and the magnet disk 23; a radial guide vane 13 is installed on the rear side of the impeller, and the guide vane is fixed to the impeller shell through a rear plate 33.
[0043] The stator coil is also in the shape of a flat disk, so as to increase the torque and reduce the axial distance to make the shafting work in a rigid state, reduce the critical effect, and increase the torque.
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Description & Claims & Application Information

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Owner:CHINA CNR LIMITED DALIAN ELECTRIC TRACTION R&D CENT
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