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Fan

A technology for ventilation devices, channels, applied in pump devices, components of pumping devices for elastic fluids, liquid fuel engines, etc., can solve the problems of noise-intensive speed and pressure fluctuations, uneven blades, etc.

Pending Publication Date: 2019-12-31
EBM PAPST ST GEORGEN & -
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the ventilation unit is installed in the equipment, the asymmetry of the flow channel of the equipment leads to an uneven flow into the vanes of the ventilation unit and thus to noise-intensive velocity and pressure fluctuations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] figure 1 It is a plan view of the inflow-side end face 2 of the ventilation device 1 . The end face 2 is square in contour. The circular central area of ​​the end face 2 is filled by cascades 3 . Said cascade 3 comprises a plurality of main struts 4 leading straight to a common central point 5 and secondary struts 6 extending coaxially around said central point 5 . The main struts 4 are connected at their ends in one piece to a frame 7 surrounding the cascade 3 and to a circular hub 8 which occupies the center of the cascade 3 .

[0038] The number of openings 9 is limited by the main and secondary struts 4 , 6 respectively intersecting each other at right angles.

[0039] The edge of the vane 11 of the fan wheel 10 at the rear of the end face 2 is presented through the opening 9 (see appendix figure 2 , 3). The axis of rotation 12 of the ventilation device impeller is perpendicular to the attached figure 1 The plane of paper extends through the center point 5. ...

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PUM

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Abstract

A housing (17) of a fan (1) comprises an inflow-side end surface (2), an outflow-side end surface (16), and a wall ring (15) which extends in the direction of an axis (12) from one of the end surfaces(2) to the other (16) and bounds a fan passage. A fan wheel (10) is arranged in the fan passage. A grid (3) is arranged on the inflow-side end surface (2), said grid having a hub (8) positioned centrally in the fan passage, primary struts (4) extending in the radial direction between the hub (8) and the edge of the fan passage and secondary struts (6) which intersect the primary struts (4).

Description

technical field [0001] The present application relates to a ventilation device, in particular to a ventilation device for installation in a device to be cooled. The basic requirements for such a ventilation unit were a compact design, energy efficiency and low-noise operation. Background technique [0002] Such ventilators generally have a rectangular housing through which a ventilator channel extends between an inflow-side end face and an outflow-side end face, and which have a motor and a fan impeller mounted in the ventilator channel middle. A ventilation device of this type is shown, for example, in DE3528748C2. In the ventilation device, the engine and the ventilation device impeller are connected with the wall ring that limits the passage of the ventilation device through a cascade installed on the end face of the outflow side of the ventilation device. Consisting of struts extending above. [0003] Such cascades can bring about a static supercharging through the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D25/06F04D29/54F04D29/66F04D29/70
CPCF04D25/0606F04D25/0693F04D29/542F04D29/666F04D29/703F05D2250/51F04D19/002F04D29/544F04D29/667F04D29/526F04D25/0646F04D29/541F04D25/08F04D25/0613F04D29/4226
Inventor W·洛费尔
Owner EBM PAPST ST GEORGEN & -