CN2714854Y

CN2714854Y - Bidirectional propeller fan

Info

Publication number: CN2714854Y
Application number: CN 200420027256
Authority: CN
Inventors: 许文元; 叶美华; 徐国忠
Original assignee: Changshu Fan Co ltd
Current assignee: Changshu Fan Co ltd
Priority date: 2004-05-18
Filing date: 2004-05-18
Publication date: 2005-08-03
Anticipated expiration: 2014-05-18

Abstract

The utility model relates to a bidirectional propeller fan, which is suitable for the places of the mine, the wood drying kiln, the subway, etc. ; the bidirectional propeller fan comprises a fan fixing seat 3, a fan cylinder 2, motor 5, a vane 1 and a pair of wind collecting units 11 and 11'; the pair of wind collecting units 11 and 11' are symmetrically fixed at both sides of the fan cylinder 2 that are respectively provided with a sound absorber 12; the vane comprises a leaf 1a and a leaf 1b; the leaf 1b and the leaf 1a are mutually wrapped in reverse direction; the wind collecting units 11 and 11 are respectively provided with a center sound absorber 7 that is fixedly arranged in the center of the air suction and discharging cavity 8 of the wind collecting units 11 and 11. The ventilation in reverse direction of the structure can be reached more than 80 percent of the ventilation in positive direction; the center shock absorber 7 is added, and good noise reduction effect is provided.

Description

Two-way propeller fan

Technical field

The utility model relates to a kind of two-way propeller fan, and particularly a kind of place that is applicable to mine, drying of wood kiln, subway and so under normal circumstances keeps forward to ventilate, and when emergency episode takes place the two-way propeller fan of inverted ventilation in time.

Background technique

Propeller fan is a purposes fluid machinery comparatively widely, and in many applications, propeller fan must have the ability of inverted ventilation.For example aforesaid timber drying kiln, colliery roadway, city underground or the like, the propeller fan of this type of occasion is being undertaken the new wind in the external world in the ordinary course of things or is being claimed the task that fresh air is introduced, be that forward ventilates, but, noxious air in tunnel, the subway in time outwards must be pumped because of needs or because of certain accident, propeller fan became original forward ventilation role and was the inverted ventilation role this moment.

Though two-way propeller fan is because of it has forward, the inverted ventilation function is that people widely use in subway, tunnelling works, but mainly there is the deficiency of following two aspects in existing two-way propeller fan: the one,, the ventilation of inverted ventilation is lower for the ventilation that forward ventilates, it only is about 60% of forward ventilation, in case therefore in tunnel, subway, the tunnel harmful gas takes place, just can't noxious air outwards be taken out the personnel's that have little time to evacuate a period of time in entail dangers to subway, tunnel, the roadway life with the short time; The 2nd,, noise ratio is bigger.

Summary of the invention

Task of the present utility model is that a kind of two-way propeller fan good inverted ventilation effect, that noise is little that has will be provided.

Task of the present utility model is finished like this, a kind of two-way propeller fan, by blower fan fixed base 3, blower fan cylindrical shell 2, motor 5, blade 1 and a pair of wind collecting unit 11,11 that is fixed on each tool shock absorber 12 of blower fan cylindrical shell 2 both sides respectively symmetrically ' form, described blade 1 comprises leaf lobe 1a and leaf lobe 1b, and the mutually reverse born of the same parents of leaf lobe 1b and leaf lobe 1a close; Described wind collecting unit 11,11 ' also respectively has a center shock absorber 7, center shock absorber 7 be installed in wind collecting unit 11,11 ' suction, air draft chamber 8 among the centre.

Shock absorber 12 used sound-absorbing materials described in the utility model are cellucotton.

Shock absorber 7 used sound-absorbing materials in center described in the utility model are cellucotton.

The inverted ventilation amount that the utility model structure is embodied can reach more than 80% of forward ventilation, and because of having added center shock absorber 7, has good noise reduction.

Accompanying drawing and drawing explanation

Fig. 1 is the assembling assumption diagram of the two-way propeller fan of the utility model.

Fig. 2 is the front view of the blade 1 of the two-way propeller fan of the utility model.

Fig. 3 is the cross section enlarged diagram of Fig. 2.

Embodiment

Ask for an interview Fig. 1, blower fan cylindrical shell 2 is fixed on the blower fan fixed base 3, and motor 5 is installed in the blower fan cylindrical shell 2 by motor fixing frame 4, and blade 1 is installed on the vanes fixed dish, and the vanes fixed dish is fixed on the reel of motor 5.The both sides of blower fan cylindrical shell 2 are expanded and have been set as flange edge, on the flange edge respectively affixed wind collecting unit 11,11 ' an end, wind collecting unit 11,11 ' end in addition be connected with suction, air draft pipeline, wind collecting unit 11,11 ' shape near horn-like.Wind collecting unit 11,11 ' the multiple intrinsic shock absorber 12 of inwall, this shock absorber 12 with regard to himself structure be a shape be equal to wind collecting unit 11,11 ' cylindrical shell, has cavity, filling cellucotton in the cavity, cellucotton adopts glass fibre cotton, and ultra-fine fibre glass cotton preferably, the chamber wall bloop 9 that gathers.The shape of a pair of center shock absorber 7 respectively is a cylindrical shape, and its two ends are bearing in each end end of pair of brackets 10 respectively, and the other end end of pair of brackets 10 be fixed on wind collecting unit 11,11 ' on.The structure of center shock absorber 7 and principle and shock absorber 12 are similar, also are the filling sound-absorbing materials of ultra-fine fibre glass cotton preferably in cavity, and the bloop 6 that gathers on outer wall.Like this, the noise that produces when blower fan is via wind collecting unit 11 or 11 ' time of wind collecting unit, and sound just enters from bloop 9,6 respectively, is received and noise reduction by sound-absorbing material.

See Fig. 2 and Fig. 3, illustrated blade 1 to close wing for reverse double end born of the same parents, promptly close and constitute by leaf lobe 1b and the mutually reverse born of the same parents of leaf lobe 1a, by sectional shape shown in Figure 3, more particularly, the microcephaly of leaf lobe 1b aims at the major part of leaf lobe 1a, and the microcephaly of leaf lobe 1a aims at the major part of leaf lobe 1b, realizes that each other born of the same parents close.The general molded mode born of the same parents of employing synthesize shape.This so-called double end born of the same parents are closed wing, the research of its performance test is tested by fluid machinery system of active institute of Xi'an Communications University, proves that the inverted ventilation amount of the blade 1 of this shape can reach more than 80% of forward ventilation.See the blower fan technology phase 26 days the 1st February in 2003 for details.

Under normal circumstances, the utility model is installed in mine roadway, subway, the tunnel, carries fresh air for roadway, subway, tunnel, promptly shows as forward and ventilates; In case and Yin Tefa incident, in the time of noxious air in roadway, subway, the tunnel need being effluxed, then motor 5 counterrotatings, blade 1 is as the same, because the specificity of the shape of blade 1 is compared so air can be ventilated with forward, effluxes to be not less than 80% of forward ventilation, and in whole suction, air draft process, noise reduction is better.

Claims

1, a kind of two-way propeller fan, form by blower fan fixed base (3), blower fan cylindrical shell (2), motor (5), blade (1) and a pair of wind collecting unit (11), (11 ') that are fixed on each tool shock absorber (12) of blower fan cylindrical shell (2) both sides respectively symmetrically, it is characterized in that described blade (1) comprises leaf lobe (1a) and leaf lobe (1b), leaf lobe (1b) and leaf lobe (1a) both mutually reverse born of the same parents close; Described wind collecting unit (11), (11 ') also respectively have a center shock absorber (7), and center shock absorber (7) is installed in centre among the suction, air draft chamber (8) of wind collecting unit (11), (11 ').

2, two-way propeller fan according to claim 1 is characterized in that the used sound-absorbing material of described shock absorber (12) is a cellucotton.

3, two-way propeller fan according to claim 1 is characterized in that the used sound-absorbing material of described center shock absorber (7) is a cellucotton.