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Integrated end sealer in fan-case structure

A technology of seals and shrouds, which is applied to the components of pumping devices for elastic fluids, pump elements, liquid fuel engines, etc., and can solve problems such as ineffective sealing

Inactive Publication Date: 2004-10-06
SIEMENS VDO AUTOMOTIVE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these ribs are not effective at sealing air leaks through the end gap

Method used

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  • Integrated end sealer in fan-case structure
  • Integrated end sealer in fan-case structure
  • Integrated end sealer in fan-case structure

Examples

Experimental program
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Embodiment Construction

[0012] figure 1 Shown therein is a fan-shield structure generally indicated by 10 in accordance with the principles of the present invention. The fan-shield structure 10 includes a fan indicated generally at 12, and the fan 12 has a hub 14 coupled to a shaft 16 of a motor 18 for rotating the fan 12 about an axis B. The fan includes a plurality of blades 20. Each blade 20 is connected to the hub 14 at one end thereof, and the end 21 of each blade 20 is connected to an endless belt 22. Such as figure 2 It is clearly shown that the belt 22 is preferably L-shaped with a radially extending portion 24 and an axially extending portion 27. The motor 18 is mounted to a shield generally indicated at 26. The shield 26 includes support ribs 29 extending from the body of the shield 26 to the motor mounting portion 19 of the shield. The ribs 29 substantially adjoin the blades 20 of the fan 12.

[0013] According to the invention, the shield 26 includes an improved labyrinth seal 28 with a co...

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PUM

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Abstract

A fan-shroud structure 10 includes a fan 12 mounted for rotation about an axis B. The fan has a plurality of blades 20 with tips of the blades being coupled to an annular band 22. A shroud 26, including an annular labyrinth seal 28, is disposed generally adjacent to the annular band thereby defining a gap 30 between the annular band and the seal. The seal has a corrugated profile and is constructed and arranged to provide resistance to air flow as air swirls and flows back into the gap and to minimize air leakage across the gap.

Description

[0001] This application is based on the U.S. Provisional Application with the document number 2003P01238US filed on January 29, 2003 entitled "Integral Seal End in Fan-Shield Structure" and claims priority. Technical field [0002] The invention relates to improving fan efficiency and reducing fan noise in engine cooling applications. The main purpose of the present invention is to provide a device that effectively reduces noise and improves fan efficiency by minimizing air leakage and the vortex component between the combined fan blade and the shroud. Background technique [0003] Conventionally, in axial fans, labyrinth end seals are used to reduce air leakage or airflow in the gap (about 5 mm) between the shroud and the rotor (fan) in the engine cooling fan assembly. Ribs are also used to reduce this air leakage. One disadvantage of labyrinth seals is that they are difficult to manufacture, and manufacturing tolerances often limit the correct design of the seals. The ribs in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/16
CPCF04D29/164F04D29/326
Inventor S·纳德奥
Owner SIEMENS VDO AUTOMOTIVE CORP