Centrifugal fan provided with air tight ring
A centrifugal fan and airtight ring technology, applied in mechanical equipment, machines/engines, liquid fuel engines, etc., can solve the problems of no strict requirements on sealing, increasing the medium leakage path and medium leakage friction, and poor sealing. , to achieve the effect of overcoming poor sealing and enhancing sealing
Inactive Publication Date: 2012-10-10
SUZHOU TAIHU FAN MFG
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Problems solved by technology
In the past, centrifugal fans were mainly used for transporting harmless gases or for indoor and outdoor air conditioning. There were no strict requirements on the sealing between the motor output shaft and the motor housing. However, with the expansion of the application range of centrifugal fans, when When the centrifugal fan is used to transport some radioactive gases and other harmful media to the human body, there are strict requirements on the sealing between the motor output shaft and the motor housing.
Most of the existing centrifugal fans use labyrinth seals to seal the cooperation between the motor output shaft and the motor housing. , in order to increase the leakage path of the medium and the friction force of the medium leakage, thereby reducing the sealing of the medium loss, but in actual use, it is found that the centrifugal fan with the labyrinth seal has poor sealing performance, large leakage and easy damage, which cannot meet the current requirements. Some production needs
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[0011] The present invention is described below in conjunction with accompanying drawing.
[0012] as attached figure 1 A centrifugal fan provided with an airtight ring according to the present invention includes a motor output shaft 1, a fan casing 2, an impeller 9, a sleeve 7, a labyrinth ring 5, a gland 8 and fasteners 4 , the motor output shaft 1 passes through the fan housing 2 and is connected to the impeller 9 in the fan housing 2, the sleeve 7 is set outside the motor output shaft 1 and is close to the outside of the fan housing 2, A labyrinth ring 5 is provided between the motor output shaft 1 and the sleeve 7, and the gland 8 is set outside the motor output shaft 1 and connected to the sleeve 7 through a fastener 4 for pressing the labyrinth ring 5; The labyrinth ring 5 is provided with an airtight ring 6; the airtight ring 6 is provided with an air pipe 3; the material of the labyrinth ring 5 is asbestos rubber.
[0013] When the centrifugal fan provided with an a...
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The invention discloses a centrifugal fan provided with an air tight ring. The centrifugal fan comprises a motor output shaft, a fan shell, an impeller, a sleeve, a labyrinth ring, a gland and a fastener, wherein the motor output shaft penetrates through the fan shell and is connected with the impeller in the fan shell; the sleeve is sleeved outside the motor output shaft and is tightly pressed against the outer side of a fan rear plate; the labyrinth ring is arranged between the motor output shaft and the sleeve; the gland is sleeved outside the motor output shaft, is connected with the sleeve through the fastener and is used for pressing the labyrinth ring; the air tight ring is arranged in the labyrinth ring; an adapter tube is arranged on the air tight ring; and the labyrinth ring is made of asbestos rubber. By the centrifugal fan provided with the air tight ring, an air tight sealing ring is arranged on the basis of the labyrinth ring, so that the defects that the common labyrinth type seal is low in sealing property, high in leakage and easy to damage are greatly overcome.
Description
technical field [0001] The invention relates to a centrifugal fan, in particular to a centrifugal fan provided with an airtight ring. Background technique [0002] The centrifugal fan is a machine that relies on the input mechanical energy to increase the gas pressure and discharge the gas. It is a driven fluid machine. Centrifugal fans are widely used in factories, mines, tunnels, cooling towers, air conditioning equipment and household electrical equipment. In the past, centrifugal fans were mainly used for transporting harmless gases or for indoor and outdoor air conditioning. There were no strict requirements on the sealing between the motor output shaft and the motor housing. However, with the expansion of the application range of centrifugal fans, when When the centrifugal fan is used to transport some radioactive gases and other media harmful to the human body, there are strict requirements on the sealing performance between the motor output shaft and the motor housi...
Claims
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IPC IPC(8): F04D29/12
Inventor 汤永明
Owner SUZHOU TAIHU FAN MFG