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Air outlet unit for large blower assembly

A technology of air outlet and blower, which is applied to parts, pump elements, mechanical equipment, etc. of the pumping device used for elastic fluid, which can solve the problems of negative effects of efficiency and achieve the effect of improving efficiency

Inactive Publication Date: 2006-02-08
HOWDEN POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This is true for all air outlet devices of the above type handling gases at high velocities and pressures, where eddies and recirculation flows at the ends of the inner tube elements have a severe negative effect on efficiency

Method used

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  • Air outlet unit for large blower assembly
  • Air outlet unit for large blower assembly
  • Air outlet unit for large blower assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] refer to figure 1 , The blower assembly 2 includes a suction box 7 with an air inlet, and an impeller 4 and a diffuser 1 . The impeller 4 is driven by a motor 8 connected to the impeller 4 by a shaft 9 extending through the suction box 7 . A tubular body 10 passing through the suction box 7 contains the shaft 9, main bearing 11 and any other means. A fluid such as air flowing to a power station or exhaust gas discharged from a power station is sucked into the suction box 7 in the direction indicated by arrow A through the impeller 4, and the suction box 7 makes the flow from the inlet to the impeller 4 The direction changes. An impeller 4 with blades, which in turn raise the pressure of the fluid, is turned by a shaft 9 connected to a motor 8 . As mentioned above, the shaft 9 passes through this suction box 7 in a tubular body 10 which can also hold the main bearing 11 for the shaft 9, the ducts for the sealing air, and the blower's Equipment used or required to fun...

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PUM

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Abstract

An air outlet unit ( 101 ) for a large blower assembly comprising an outlet tube member ( 103 ) with an upstream inner end in flow communication with the pressure side of an impeller of the blower asembly and a downstream outer end for connection with a duct and a mainly cylindrical inner tube member ( 105 ) arranged coaxially to the outlet tube member ( 103 ) and having an inner end substantially aligned with the inner end of the outlet tube member ( 103 ) and a downstream outer end, the inner tube member ( 105 ) being closed by a closing means ( 106 ). The inner tube member ( 105 ) has an open downstream end ( 8114 ) projecting in the downstream direction beyoud the downstream outer end of the outlet tube member ( 103 ) to thereby achieve a reduced pressure loss and a more uniform velocity profile.

Description

technical field [0001] The present invention relates to an air outlet assembly for a large blower assembly comprising an upstream inner end in fluid communication with the pressure side of the impeller of the fan assembly and a downstream outer end for connection to a delivery duct an outlet pipe member at the end, a generally cylindrical inner pipe disposed coaxially with the outlet pipe member having an inner end substantially aligned with the inner end of the outlet pipe member and a downstream outer end element, the inner tube element is closed by a closing device. Background technique [0002] In large blower assemblies used in power stations, fluidized bed systems, tunnels, etc., the efficiency of the blower assembly is critical as the motor power driving the impeller is 700kW or more. The development / development of larger blower assemblies due to the increased velocity and pressure of the fluid places higher demands on the different parts. [0003] This is true for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/44F04D29/54F04D29/66
CPCF04D29/541
Inventor E·延森
Owner HOWDEN POWER