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Carangidae fish simulation forwardly bent type multi-blade centrifugal fan blade and method for manufacturing same

A centrifugal fan and fish technology, applied in mechanical equipment, non-variable pumps, machines/engines, etc., can solve the problems of affecting the indoor environment, disturbing the quiet environment, and large dynamic noise, so as to reduce quality and reduce aerodynamic noise , the effect of strong work ability

Inactive Publication Date: 2018-08-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the airflow flows through the impeller blade channel, a large pressure pulsation will be generated on the blade wall, resulting in a large aerodynamic noise, which becomes a source of disturbance to the quiet environment and seriously affects the indoor environment.

Method used

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  • Carangidae fish simulation forwardly bent type multi-blade centrifugal fan blade and method for manufacturing same
  • Carangidae fish simulation forwardly bent type multi-blade centrifugal fan blade and method for manufacturing same
  • Carangidae fish simulation forwardly bent type multi-blade centrifugal fan blade and method for manufacturing same

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Embodiment Construction

[0027] The present invention is described in further detail below in conjunction with accompanying drawing:

[0028] Studies have shown that fish have evolved various shapes and complete physiological structures during the long-term evolution process, and these shapes and structures correspondingly enable them to have excellent swimming performances such as high efficiency and fast speed. In addition to the unique swing propulsion method, the high-efficiency swimming performance of fish also benefits from its effective drag reduction mechanism. In addition to the non-smooth structure of the fish skin, this drag reduction mechanism is also directly related to the streamlined shape of the fish. Therefore, based on reverse reconstruction engineering, the streamlined shape of the fish can be applied to the impeller of the multi-blade centrifugal fan, so that the blades have a better drag reduction effect, increase the air volume, and reduce the pressure fluctuations on the blade s...

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Abstract

The invention discloses a carangidae fish simulation forwardly bent type multi-blade centrifugal fan blade and a method for manufacturing the same. The carangidae fish simulation forwardly bent type multi-blade centrifugal fan blade is applied to multi-blade centrifugal fans and comprises a blade body. The cross section of the blade body is in the shape of the contour of the cross section of simulated carangidae fish, a medial camber line of the cross section of the blade body is in the shape of a single arc, and a circle center location, an arc radius and an arc center angle of the medial camber line of the cross section of the blade body are determined according to forwardly bent blade profile design methods for the multi-blade centrifugal fans. The carangidae fish simulation forwardly bent type multi-blade centrifugal fan blade and the method have the advantages that flowing of airflow in impellers can be improved by the carangidae fish simulation forwardly bent type multi-blade centrifugal fan blade on the premise that the air volumes are increased, surface pressure pulsation of the carangidae fish simulation forwardly bent type multi-blade centrifugal fan blade can be reduced,and pneumatic noise can be lowered.

Description

technical field [0001] The invention relates to a bionic blade and a preparation method thereof, in particular to a forward-curved multi-wing centrifugal fan blade imitating trevally fish and a preparation method thereof. Background technique [0002] The forward-facing multi-blade centrifugal fan is widely used in household appliances such as range hoods and ventilation devices. It has the characteristics of compact structure, high pressure coefficient, and large flow coefficient. Its structure includes motor, volute and impeller. Among them, the impeller is the core component of the multi-blade centrifugal fan, which has the characteristics of large number of blades, large blade curvature, large inner and outer diameter of the impeller, and short blade passage. The performance of the impeller directly affects the range hood and ventilation device. performance of household appliances. When the range hood is working, the motor is directly connected to drive the impeller to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/30
CPCF04D29/30
Inventor 刘小民熊仲营
Owner XI AN JIAOTONG UNIV
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