CN201916251U

CN201916251U - Reversible axial flow fan

Info

Publication number: CN201916251U
Application number: CN2011200165824U
Authority: CN
Inventors: 王文彦; 雷森
Original assignee: TIANJIN JIN BLOWER CO Ltd
Current assignee: Jingu Fan Group Co ltd; Tianjin Tianjin blower Refco Group Ltd.
Priority date: 2011-01-19
Filing date: 2011-01-19
Publication date: 2011-08-03
Anticipated expiration: 2021-01-19

Abstract

The utility model relates to a reversible axial flow fan, which comprises blades (1). Blade surfaces (3) are S-shaped wing profiles or S-shaped circular arc plate wing profiles; the blade surfaces (3) are S-shaped torsion or non-torsion blade surfaces. Footstalks (4) of the blades are conical or cylindrical. Footstalk seats (5) on hubs (2) are conical or cylindrical; and the blade profile midcourt lines of the S blade surfaces are in S shapes, i.e. the front half parts of the wing profiles are upwards bulged, and the rear half parts of the wing profiles are downwards bulged.

Description

But reverse type propeller fan

Technical field

The utility model relates to a kind of brand-new propeller fan, efficient, low noise, energy-conservation and environmental protection, its excellent combination property.

Technical background

Along with the develop rapidly of Chinese national economy and transportation, expressway is greatly developed in the mountain area, for reducing the whole cost of high speed operation, tunnel and super long tunnel must occur.Metropolitan communications and transportation pressure is severe day by day, and in order to alleviate the pressure of traffic above-ground transportation, subway emerges in each big city one after another as a kind of emerging means of transportation efficiently.

Tunnel and subway ventilation are almost all finished by blower fan because block and during the fire smoke evacuation blower fan need the clockwise and anticlockwise air-supply, and assurance clockwise and anticlockwise air output and blast size are wanted basically identical.Therefore but ventilation system has disposed a large amount of reverse type propeller fans.

Summary of the invention

But a kind of reverse type propeller fan comprises blade, it is characterized in that the blade face is serpentine air-foil or serpentine circular arc plate aerofoil profile.

Above-mentioned blade face is that serpentine reverses or the non-blade face of reversing.The petiole of blade is conical or cylindrical.The petiole seat is conical or cylindrical, and " S " blade face blade profile center line is " S ", and promptly the aerofoil profile first half raises up, and aerofoil profile is latter half of to lower convexity.

But the reverse type propeller fan will guarantee to have identical and close fan performance under the operating mode rotating and reverse, so the ventilating vane aerofoil profile is had specific (special) requirements." S " blade face blade profile center line is " S ", and promptly the aerofoil profile first half raises up, and aerofoil profile is latter half of to lower convexity.The serpentine wing blades has under the same angle of attack, forward is walked around the mobile more similar of aerofoil profile head during with antikinesis, but can guarantee the performance requirement of reverse type propeller fan, and good flowing properties, flow losses are little, high by 5～7% than other shape aerofoil profile efficient, low 6～9 decibels of noise.

Description of drawings

Figure 1A is the impeller sets left view;

Figure 1B is the impeller sets right elevation;

Fig. 2 A is the blade plan view;

Fig. 2 B is blade profile figure;

Fig. 2 C is the blade plan view;

Fig. 3 A is the wheel hub left view;

Fig. 3 B is the wheel hub right elevation;

1-blade 2-wheel hub 3-blade face 4-petiole 5-petiole seat

Embodiment

But a kind of reverse type propeller fan comprises blade 1, and blade face 3 is serpentine air-foil or serpentine circular arc plate aerofoil profile.Above-mentioned blade face 3 is reversed for serpentine or the non-blade face of reversing.The petiole 4 of blade is conical or cylindrical.Petiole seat 5 on the wheel hub 2 is conical or cylindrical, and " S " blade face blade profile center line is " S ", and promptly the aerofoil profile first half raises up, and aerofoil profile is latter half of to lower convexity.

Petiole and petiole seat are conical, have reduced procedure, and manufacturing efficiency is remarkable, features simple and practical process, and packaging efficiency also obviously improves, convenient and swift, few easy workout part.

Claims

1. but a reverse type propeller fan comprises blade (1), it is characterized in that blade face (3) is serpentine air-foil or serpentine circular arc plate aerofoil profile.

2. but according to the described reverse type propeller fan of claim 1, it is characterized in that above-mentioned blade face (3) are reversed for serpentine or the non-blade face of reversing.

3. but according to claim 1 or 2 described reverse type propeller fans, the petiole (4) that it is characterized in that blade (1) is for conical or cylindrical.

4. but, it is characterized in that the petiole seat (5) on the wheel hub (2) is taper shape or cylindrical according to the described reverse type propeller fan of claim 3.

5. but according to the described reverse type propeller fan of claim 1, it is characterized in that " S " blade face blade profile center line is " S ", promptly the aerofoil profile first half raises up, and aerofoil profile is latter half of to lower convexity.