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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI 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 of high flow rate and long life, it cannot meet the needs of high-speed and stable operation. At present, centrifugal high-speed turbo refrigeration and motor vehicle electric booster air superchargers are also in urgent need of high-speed fans.

Method used

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  • Vertical type direct connection draught fan

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 The permanent magnet rotors are distributed axially, and the fans are arranged vertically.

[0034] see figure 1 , the permanent magnet rotor 21 and the stator coil 22 are distributed axially, the permanent magnets of the permanent magnet rotor are arranged around the axis in the axial direction of the shaft, and the stator coils corresponding to the permanent magnet rotor are also arranged around the axis in the axial direction of the shaft , that is, both the permanent magnet rotor and the stator coil are cylindrical; a magnetizer cylinder 23 is arranged on the outside of the stator coil symmetrical to the permanent magnet rotor, and the permanent magnet rotor 21, the stator coil 22 and the magnetizer cylinder 23 are placed on the body of the impeller 31 In the cavity of the impeller, the magnetic conductor cylinder 23 is fixedly connected with the impeller body and rotates with the shaft. And the positions of the permanent magnet rotor 21 and the magnet...

Embodiment 2

[0038] Embodiment 2 The permanent magnet rotors are radially distributed, and this embodiment is vertically arranged.

[0039] see figure 2 , the basic structure of the impeller, shaft and impeller shell is similar to that of Embodiment 1, the special feature is that the permanent magnet rotors are radially distributed, the permanent magnet rotors are arranged according to the radial distribution of the shaft, the permanent magnet rotors are disc-shaped, and the permanent magnet rotor discs after the impeller. The corresponding stator coils are concentrated windings, which are also distributed around the shaft in the radial direction of the shaft. This structure is suitable for fans with high torque and slightly low speed.

[0040] Experimental results show that the rotational speed can reach above 15000rpm. The wind pressure ratio can reach more than 1.5.

Embodiment 3

[0042] see image 3, the basic structure is similar to that of Embodiment 2, and the special feature is that the stator coil is also in the shape of a flat disk, and a magnetizer disk 23 is arranged on the other side of the stator coil symmetrical to the permanent magnet rotor, and the magnetizer disk is fixed to the shaft Connected, the stator coil 22 is interposed between the permanent magnet rotor 21 and the magnetizer 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 the 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 so that the shafting works in a rigid state, reduce the critical effect and increase the torque.

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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.

Description

technical field [0001] The invention relates to a fan, in particular to a vertical direct-connected fan. It belongs to a branch of the field of aerodynamics - the field of fans. Background technique [0002] At present, most of the technical status of the fan is to use the motor as the driving force to drive the two-dimensional impeller to inhale and compress the air and then discharge it. Widely used in ventilation, smoke exhaust, sewage treatment, material transportation, and other fields. [0003] The common fan is mainly composed of motor, impeller, fan housing and other parts. It uses the structure of centrifugal impeller to pressurize the gas. However, most of the fans currently have a low speed of 3000 revolutions per minute or less. Although in some electric tools and The series-excited motor used in the vacuum cleaner has a high speed but has large interference, short life and low efficiency and will be gradually eliminated. Among them, the centrifugal fan is mai...

Claims

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Application Information

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IPC IPC(8): F04D25/06F04D29/28H02K7/10H02K33/18
Inventor 佟宪良
Owner BEIJING LIANGMING TONGCHUANG WATER TREATMENT EQUIP DEV CENT
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