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Mining local axial fan with blade tip back edge as sawtooth structure

A ventilator and axial flow technology, which is applied to components of pumping devices for elastic fluids, mechanical equipment, non-variable pumps, etc., can solve the requirements of higher machining accuracy and strength of blades, and the process of bending and twisting blades And problems such as complex process and inconvenient integrated design, to achieve the effect of reducing blade tip noise, reducing fatigue and improving efficiency

Pending Publication Date: 2019-08-20
代元军
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above methods change the aerodynamic characteristics of the axial flow fan by optimizing the structural parameters of the blades and designing new blades to reduce the aerodynamic noise of the axial flow fan, but changing the structural parameters of the blades and designing new blades will change the aerodynamic characteristics of the axial flow fan. Structural dynamic characteristics complicate the problem, increase the influencing factors, and increase the difficulty of research
[0003] The disadvantages of the method of forward-swept blades and twisted blades for noise reduction are: the process and process of manufacturing curved and twisted blades are relatively complicated, and the processing accuracy and strength of the blades are required to be higher, which increases the manufacturing cost.
The manufacturing cost of soft-edge blades is several times that of ordinary blades, and it is not convenient for integrated design

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  • Mining local axial fan with blade tip back edge as sawtooth structure
  • Mining local axial fan with blade tip back edge as sawtooth structure
  • Mining local axial fan with blade tip back edge as sawtooth structure

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Embodiment Construction

[0016] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0017] In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrally connected; it can be mechanically connected or electrically connected: it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordi...

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Abstract

The invention relates to the technical field of energy conservation and noise reduction of mining local axial fans, in particular to a mining local axial fan blade with a blade tip back edge as a sawtooth structure. The mining local axial fan blade is characterized by comprising a blade main body; and the blade tip back edge of the blade main body is a sawtooth slot. The invention further providesa local mining axial fan; and the local mining axial fan comprises the blade with the blade tip back edge as the sawtooth slot, an air collector, a I-grade machine body, an I-grade impeller, a II-grade impeller, a II-grade machine body, an explosion-proof three-phase asynchronous motor and a silencing dispersion cone. In the fan blade with the blade tip back edge as the sawtooth structure, the blade tip back edge of the fan is grooved to form the sawtooth structure; the blade tip back edge structure is improved under the precondition of not increasing the cost; the process is simple; the integral design is convenient; and the scale production can be realized. Meanwhile, under the precondition of guaranteeing the ventilation performance of the fan, the outlet flowing speed of the fan is accelerated, the pneumatic noise of the fan is reduced, the flowing loss of the fan is reduced, the efficiency of the fan is improved, and the service life of the fan is prolonged.

Description

technical field [0001] The invention relates to the technical field of energy saving and noise reduction of local axial-flow fans for mines, in particular to a local axial-flow fan for mines with a zigzag trailing edge of blade tips. Background technique [0002] In order to reduce the flow loss and aerodynamic noise of the axial flow fan and improve the aerodynamic efficiency, researchers from all over the world have proposed various methods. Such as the use of forward-swept blades, curved twisted blades and soft-edge blades. The above methods change the aerodynamic characteristics of the axial flow fan by optimizing the structural parameters of the blades and designing new blades to reduce the aerodynamic noise of the axial flow fan, but changing the structural parameters of the blades and designing new blades will change the aerodynamic characteristics of the axial flow fan. The dynamic characteristics of the structure complicate the problem, increase the influencing fac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/38F04D29/66
CPCF04D29/384F04D29/388F04D29/666F04D29/667
Inventor 代元军李保华吴柯万明月封彬
Owner 代元军