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Centrifugal blower having volute chamber with subchannel

A centrifugal fan and shunt technology, which is applied to the components of the pumping device for elastic fluids, mechanical equipment, machines/engines, etc. Reduced chances of friction, beneficial effects on safe operation and improved flow efficiency

Inactive Publication Date: 2007-04-25
宣伯民
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AI Technical Summary

Problems solved by technology

Centrifugal fans have many well-known advantages, but there are also some disadvantages, especially in the spiral chamber of the volute, the airflows collide and interfere with each other, generating vortices, which consume a lot of energy in vain. Due to the generation of the vortex area, the flow state in the spiral chamber Deterioration, the airflow cannot flow out smoothly, causing the static pressure in the spiral chamber to increase, which will increase the return flow and leakage loss, and reduce the volumetric efficiency
Due to the stagnation of the airflow in the spiral chamber, the chance of friction with the high-speed rotating impeller increases, and the friction time is prolonged, which converts energy into harmful heat and increases the temperature of the spiral chamber. When the airflow contains combustible dust, it is easy to cause Combustion or even explosion will pose a hidden danger to safe operation

Method used

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  • Centrifugal blower having volute chamber with subchannel

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] In the figure, the spiral chamber in the volute 1 is provided with a flow channel 3, which is symmetrically arranged with the center of the impeller as the center, and the airflow thrown out by the impeller 2 is timely introduced into the flow channel 3, Each goes its own way without interfering with each other, and flows into the main flow channel 4 smoothly. For the choice of the number of runners 3, it can be selected according to the fan model; as a preference, two to six are more suitable. When the runner 3 is made of steel plate, its strength, rigidity, wear resistance and temperature resistance are all good, and it can be used to transport gas containing dust and high temperature. When transporting gases that are corrosive to metals, they must be made of plastic plates.

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Abstract

The invention discloses a centrifugal fan with dividing channel in volute spiral room with the purpose that whole running status of fan is improved. It is provided with simple structure, less part added and easy machining. The invention comprises volute body, vane wheel, driving part, rectifying part and two and more than two dividing channels in the volute spiral room. Compared with current known centrifugal fan, air flow is leaded in time and does not interfere with each other in the spiral room so as to improve efficiency and increase flow quantity. In the same time it is provided with stable running.

Description

technical field [0001] The invention relates to the field of centrifugal fans, in particular to a centrifugal fan in which a spiral chamber of a volute is provided with flow passages. Background technique [0002] Statistics show that more than 30% of the total electricity consumption in the country is consumed by pumps and fans. It can be seen that pumps and fans occupy an important position in my country's national economic construction. Centrifugal fans are the most widely used in the fan category. So the present invention relates to the field of centrifugal fans. Centrifugal fans have many well-known advantages, but there are also some disadvantages, especially in the spiral chamber of the volute, the airflows collide and interfere with each other, generating vortices, which consume a lot of energy in vain. Due to the generation of the vortex area, the flow state in the spiral chamber If it deteriorates, the airflow cannot flow out smoot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/44F04D29/02
Inventor 宣伯民
Owner 宣伯民
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