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Double-impeller counter-rotating multi-wing centrifugal fan

A technology of centrifugal fan and double impeller, which is applied in the direction of mechanical equipment, machine/engine, liquid fuel engine, etc. It can solve the problems of increasing air volume and fan energy consumption, and achieves reduced fan vibration, improved fan flow, and overall efficiency Improved effect

Pending Publication Date: 2021-04-16
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the application number CN201610301848.7, at least two air ducts and centrifugal wind wheels are set on the centrifugal fan, which realizes a substantial increase in the air volume of the entire centrifugal fan, but the basic method is to connect two fans in parallel to increase the air volume and make the The energy consumption of the fan has increased significantly, and the wind pressure of the fan has not changed much

Method used

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  • Double-impeller counter-rotating multi-wing centrifugal fan
  • Double-impeller counter-rotating multi-wing centrifugal fan
  • Double-impeller counter-rotating multi-wing centrifugal fan

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Embodiment Construction

[0034] The present invention is described in further detail below in conjunction with accompanying drawing:

[0035] Such as Figure 1 to Figure 4As shown, a double-impeller counter-rotating multi-blade centrifugal fan includes a fan volute 1, a double-impeller mechanism 41, a fan motor 4, and a double-impeller forward and reverse mechanism 40; the double-impeller mechanism 41 includes an outer impeller 7 and an inner impeller 8; The inner impeller 8 and the outer impeller 7 have the same structure, the inner impeller 8 and the outer impeller 7 are coaxially nested in the fan volute 1, the inner impeller 8 is nested in the outer impeller 7, and the inner impeller 8 and the impeller on the outer impeller 7 The blades rotate in the opposite direction; the fan volute 1 is provided with an air inlet along the end of the axis of the inner impeller 8, and the fan volute 1 is provided with an air outlet along the radial side of the inner impeller 8, and the fan motor 4 is fixed on th...

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Abstract

The invention discloses a double-impeller counter-rotating multi-wing centrifugal fan. An inner impeller and an outer impeller which are coaxially nested are arranged in a fan volute, airflow enters a cavity of the inner impeller through the inner impeller and the outer impeller which are nested mutually, and after the airflow acts through the inner impeller, the airflow at an outlet of the inner impeller further has vortex motion energy in the circumferential direction, the airflow enters an outer impeller blade inlet, and it is ensured that the airflow flowing out of inner impeller blades enters the outer impeller without impact; and the vortex motion energy, not used in the circumferential direction, in the airflow flowing out of the inner impeller further acts through the outer impeller, the energy of the airflow is improved again, then the pressure of the air flow is multiplied, the flow of the fan is greatly improved, and the overall efficiency of the fan is greatly improved. A driving shaft and a hollow shaft which are mutually nested are utilized to synchronously drive the inner impeller and the outer impeller, so that the torques generated by the two impellers are mutually counteracted, the vibration of the fan is reduced, and mechanical noise generated by the fan is reduced.

Description

technical field [0001] The invention relates to the field of multi-blade centrifugal fans, in particular to a double impeller counter-rotating multi-blade centrifugal fan. Background technique [0002] Multi-blade centrifugal fans are widely used in the field of air conditioners, range hoods and other home appliances. Air conditioners, range hoods, etc. have higher and higher requirements for the air volume and pressure of multi-blade centrifugal fans. The traditional multi-blade centrifugal fans have a single impeller or Composite impeller, the air volume and air pressure are limited. In the application number CN201810888202.2, a composite impeller is involved. By fixing and combining two impellers with different blade profiles, the air volume of the fan is increased, but the static pressure of the fan is not changed. In the application number CN201610301848.7, at least two air ducts and centrifugal wind wheels are set on the centrifugal fan, which realizes a substantial i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D25/08F04D17/16F04D29/28F04D29/66F04D29/42F04D29/44
Inventor 刘小民王加浩席光田晨晔
Owner XI AN JIAOTONG UNIV
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