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A fan cover

A machine cover and fan technology, applied in mechanical equipment, machines/engines, liquid fuel engines, etc., can solve the problems of poor sealing performance, unfavorable airflow for one-time circulation, and low work efficiency, so as to achieve stable airflow, improve fan efficiency, The effect of accelerating gas entry

Active Publication Date: 2017-01-04
CHONGQING DEGU TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Centrifugal fans are widely used in factories, mines, tunnels, cooling towers, vehicles, ships and buildings for ventilation, dust removal and cooling. Gas upper cover, because of its structural design, it is easy to form a vortex, the gas hovers in the shell, the work efficiency is not high, it is not conducive to the one-time circulation of the air flow, and the sealing performance is relatively poor, so it is not suitable for the transportation of flammable and explosive gases

Method used

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Embodiment Construction

[0027] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0028] like Figure 1 to Figure 2 As shown, the present invention provides a fan upper cover, which includes a cover body, an air inlet 14 is opened in the center of the cover body 1, and a connector is provided on the outside of the cover body 1, and the connector includes cylindrical parts arranged sequentially from outside to inside 16 and a tapered portion 17, the tapered portion 17 is connected to the outer center of the machine cover body 1, and the connecting head is provided with an air inlet hole 14, the first section of the air inlet hole 14 is a circular hole opened in the cylindrical portion 16, The second section of the air inlet hole 14 is set in the tapered portion 17 and has a tapered hole whose diam...

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Abstract

The invention provides an upper cover of a fan. The upper cover comprises a fan cover body, an air inlet is formed in the center of the fan cover body, a connector is arranged on the outer side of the fan cover body, an air incoming hole is formed in the connector, a first section of the air incoming hole is a round hole while a second section of the air incoming hole is a conical hole with diameter gradually increasing from outside to inside, the second section of the air incoming hole is communicated with the air inlet, and the edge of the air inlet forms an annular first boss towards the inner side of the fan cover body. The air incoming hole is composed of the round hole and the conical hole, so that when gas enters the fan through the air incoming hole and the air inlet, suction force exists, and effect of accelerating gas to enter is realized; after the gas enters, the first boss plays a role in guiding and limiting flowing direction of the gas, enables the gas to directly enters an impeller at the center of the fan and cooperates with a second boss to prevent the gas from willfully flowing and forming a vortex, so that air flow is stable, and efficiency of the fan is improved.

Description

technical field [0001] The invention relates to the technical field of gas transportation, in particular to a fan upper cover with good sealing performance and stable structure. Background technique [0002] Centrifugal fans are widely used in factories, mines, tunnels, cooling towers, vehicles, ships and buildings for ventilation, dust removal and cooling. Gas upper cover, because of its structural design, it is easy to form a vortex, the gas hovers in the shell, the work efficiency is not high, it is not conducive to the one-time circulation of the air flow, and the sealing performance is relatively poor, so it is not suitable for the transportation of flammable and explosive gases . Contents of the invention [0003] In view of the deficiencies of the prior art described above, the object of the present invention is to provide a fan upper cover with a reasonable structure and stable intake air flow. [0004] In order to achieve the above purpose and other related purp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/42F04D29/44
CPCF04D29/4226F04D29/441
Inventor 周华周凌冰
Owner CHONGQING DEGU TECH