Unlock instant, AI-driven research and patent intelligence for your innovation.

Fan wheel for an axial fan

A fan impeller, axial flow technology, applied in the field of vehicle radiators, axial flow fans, can solve problems such as unstable fan impeller, noise development, fan impeller instability, etc.

Inactive Publication Date: 2018-08-03
MAHLE INT GMBH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of an unfavorable combination of installation situation and current operating state, this gap flow can cause the fan wheel to become unstable
Due to an unstable fan wheel, noise development and / or deviations may be introduced within the characteristics defining the correlation between the rotational speed of the fan wheel and the conveying capacity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fan wheel for an axial fan
  • Fan wheel for an axial fan
  • Fan wheel for an axial fan

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] according to figure 1 , an axial fan 1 , only partially shown, comprising a fan impeller 2 and a fan cover 3 , by means of which axial fan a cooling air flow can be generated for a vehicle radiator. In the installed state of the axial fan 1 , a fan cover 3 , which can also be referred to as a fan guard, guides the cooling air flow generated by means of the fan wheel 2 from the vehicle radiator to the fan wheel 2 . The fan cover 3 has a housing 4 which is in figure 1 The fan impeller 2 is surrounded in the circumferential direction 5 indicated by the double arrow. A radial gap 6 is formed radially between the housing 4 and the fan wheel 2 .

[0031] as specifically from image 3As can be seen in , the fan wheel 2 has a hub 7 and a plurality of blades 8 projecting substantially radially from the hub 7 . The fan wheel 2 with hub 7 and blades 8 can be produced as a one-piece injection-moulded part from plastic or metal, especially light metal.

[0032] The fan wheel 2 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a fan wheel (2) for an axial fan for producing a cooling air flow, preferably for a vehicle radiator, comprising a hub (7), from which a plurality of blades (8) extends, wherein each blade (8) has, radially inside, a blade root (13) connected to the hub (7) and, radially outside, a blade tip (14) distant from the hub (7), wherein each blade (8) has a blade front side (17),which faces a pressure side (16) of the fan wheel (2), a blade back side (18), which faces a suction side (15) of the fan wheel (2), and a transverse profile (19), which lies in a cross-sectional plane (20) extending perpendicularly to the radial direction (12), and wherein each blade (8) has a transverse curvature (21) in the transverse profile (19) in such a way that the blade front side (17) is curved concavely toward the pressure side (16) in the transverse profile (19), while the blade back side (18) is curved convexly toward the suction side (15) in the transverse profile (19). The operation of the fan wheel (2) can be stabilized if the transverse curvature (21) of the transverse profile (19) of the blades (8) decreases from a blade central region (24), which lies radially between the blade root (13) and the blade tip (14), to the blade tip (14).

Description

technical field [0001] The invention relates to a fan wheel for generating a cooling air flow for an axial fan, preferably for a vehicle radiator, having the features stated in the preamble of claim 1 . The invention also relates to an axial fan equipped with such a fan wheel. Background technique [0002] A fan wheel is known from DE 10 2010 042 325 A1, which has a hub from which a plurality of blades extend. Each blade has a radially inner blade root connected to the hub and a radially outer blade tip remote from the hub. Furthermore, each blade has a blade front side facing the pressure side of the fan wheel, a blade rear side facing the suction side of the fan wheel, and a transverse section lying in a cross-sectional plane extending perpendicularly to the radial direction. The transverse sections of the blades each have a curvature referred to hereinafter as transverse curvature. The transverse curvature is such that the blade front side is concavely curved towards t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F04D19/00F04D29/38
CPCF04D29/384F04D29/386F05D2240/301F05D2240/307F04D19/002F05D2250/71
Inventor 斯特凡妮·拉尔庞
Owner MAHLE INT GMBH