Engine cooling fan housing shroud with unobstructed outlet

A shroud and fan technology, which is applied in the field of automotive axial flow fan components, can solve problems such as ineffective operation, and achieve the effects of reducing material costs, low fan noise, and high fan efficiency

Active Publication Date: 2021-03-12
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the radial gap "g" between the fan band 18 and the outlet bell 64, the outlet tends to operate less efficiently without a downstream blockage

Method used

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  • Engine cooling fan housing shroud with unobstructed outlet
  • Engine cooling fan housing shroud with unobstructed outlet
  • Engine cooling fan housing shroud with unobstructed outlet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Figure 4 A axial flow fan assembly 100 is shown comprising a shroud 104, a motor 108 coupled to the shroud 104, and an axial fan 112 coupled to the motor 108 and driven by the motor 108. Special, such as Figure 4 As shown, the motor 108 includes an output shaft (not shown) to drive an axial flow fan 112 around the central axis 116 of the axial flow fan 112. In the illustrated embodiment, the shroud 104 is a molded part of a single part.

[0025]The axial flow fan assembly 100 is configured to be coupled to the heat exchanger with "suction pass" such that the axial flow fan 112 is sucks the airflow through the heat exchanger. Alternatively, the axial flow fan assembly 100 can be coupled to the heat exchanger with "push through" such that the axial flow fan 112 discharges the airflow through the heat exchanger. The axial flow fan assembly 100 can be coupled to the heat exchanger using any connector in multiple different connector.

[0026] in Figure 4 In the illustrated s...

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PUM

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Abstract

A shroud for an axial fan includes an annular barrel. The barrel includes a cylindrical section and a tapered section downstream of the cylindrical section. The tapered section is angled radially inward from the cylindrical section at an angle between 15 degrees and 35 degrees. The shroud also includes an annular outlet bell coupled to the conical section at an apex defining a transition between the conical section and the outlet bell. The outlet bell and barrel house multiple leakage stators. The stator base extends from the radially inner surface of the outlet bell to the end of the stator base, and the depth (a) of the outlet bell, measured from the end surface of the outlet bell to the tip, is less than The direction of the axial airflow is half the depth (b) measured from the end surface of the outlet bell to the end of the stator.

Description

[0001] Related application [0002] The claims of the Application Serial No. 62 / 292, 532, filed on February 8, 2016, all of which are hereby incorporated by reference. Technical field [0003] The present invention relates to an axial flow fan, and more particularly to an automotive axial fan assembly having a shroud. Background technique [0004] Axial fan assembly typically includes a shroud, coupled to the shroud, and a axial fan driven by a motor. The axial flow fan typically includes a belt of the respective end of the axial flow fan blade, thereby enhancing the shaft flow fan blades and allows the end to generate greater pressure at the end of the blade. [0005] The axial fan assembly used in automotive applications must operate with high efficiency and low noise. However, various constraints typically make the design objective complicated. For example, such constraints may include a finite pitch (i.e., "fan-to-core spacing") between the axial flow fan and the upstream heat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/16F04D29/52F04D29/54F04D29/68
CPCF05D2250/52F04D29/542F04D29/547F04D29/685F04D29/526F04D19/002F04D25/08F04D29/164F04D29/326F04D29/667
Inventor W.斯蒂芬斯
Owner ROBERT BOSCH GMBH
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