Centrifugal fan structure with variable volute tongue

A centrifugal fan and volute tongue technology, which is used in mechanical equipment, engine control, non-variable-capacity pumps, etc., can solve the problems of low fan efficiency and energy waste, and achieve the effect of improving operating efficiency and easy automatic control.

Pending Publication Date: 2020-07-10
GUIZHOU ELECTRIC POWER DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

like figure 1 As shown, the size of the volute tongue of the existing centrifugal fan is fixed, and it can only achieve high efficiency near the rated working condition. When the flow rate is small or large, the efficiency of the fan is low, which leads to energy waste

Method used

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  • Centrifugal fan structure with variable volute tongue
  • Centrifugal fan structure with variable volute tongue
  • Centrifugal fan structure with variable volute tongue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Implementation example 1: further, the driving device is an electric hydraulic cylinder 9, the push rod of the electric hydraulic cylinder 9 is welded to the outer sealing plate 7, and the telescopic direction of the push rod of the electric hydraulic cylinder 9 is parallel to the length direction of the air outlet 2.

[0050] The electric hydraulic cylinder 9 pushes the outer sealing plate 7 to move stably and reliably.

Embodiment 2

[0051]Implementation example 2: further, the driving device is a stepping motor 13, the stepping motor 13 is connected to the edge of the outer sealing plate 7 through a gear mechanism, the gear mechanism includes a rack 14 and a gear 15, and the rear side of the outer sealing plate 7 The edge is a tooth bar 14, and a gear 15 is welded on the rotating shaft of the stepping motor 13, and the tooth bar 14 and the gear 15 are meshed.

[0052] More precise by stepper motor 13.

[0053] Further, it also includes: a speed sensor 11, the speed sensor 11 is arranged on the shaft of the centrifugal fan body, the speed sensor 11 is connected to the controller 12 by wires; the controller 12, the controller 12 is connected to the drive device by wires. The rotational speed sensor 11 here can be a rotary encoder, and the controller 12 here can be a controller with peripheral circuits such as Arduino, Raspberry Pi, and PLC.

[0054] The rotational speed of the shaft of the centrifugal fan ...

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Abstract

The invention discloses a centrifugal fan structure with a variable volute tongue. The centrifugal fan structure comprises a centrifugal fan body, wherein the centrifugal fan body comprises a volute and an air outlet, and the inward protruding part of the volute is the volute tongue. The centrifugal fan structure further comprises an elastic volute tongue, wherein the elastic volute tongue is a rectangular plate, one side of the elastic volute tongue is fixedly connected to the inner wall of the volute on the left side of the volute tongue, and the other side of the elastic volute tongue is movably connected to the inner wall of the upper wall of the air outlet in the length direction of the air outlet. The centrifugal fan structure with the variable volute tongue solves the problems thatin the prior art, the size of a volute tongue is fixed, high efficiency can only be achieved under the rated working condition, and when the flow is relatively small or large, the fan efficiency is relatively low, so that energy waste is caused.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to a variable volute tongue centrifugal fan structure. Background technique [0002] The volute tongue clearance of the centrifugal fan is one of the important factors affecting the efficiency of the centrifugal fan. When the air volume is small, part of the air volume will enter the volute again. When the air volume is large, part of the air volume will impact the outer wall, which will affect the efficiency of the fan. . The centrifugal fan has the highest efficiency at the rated air volume, but in actual operation, the margin is mostly considered, and even some of the time it operates at a lower working condition. like figure 1 As shown, the size of the volute tongue of the existing centrifugal fan is fixed, and it can only achieve high efficiency near the rated working condition. When the flow rate is small or large, the efficiency of the fan is low, which leads to ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/42F04D27/00F04D17/10
CPCF04D17/10F04D27/002F04D29/422F04D29/4226F05D2270/62F05D2270/64
Inventor 李超吕玉坤史久志李钟邓健罗婕莹张玉柱吴瑾
Owner GUIZHOU ELECTRIC POWER DESIGN INST
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