CN2245683Y - Paired propeller fan - Google Patents

Abstract

The utility model relates to a paired propeller fan, which is composed of an axial explosion-proof electric motor, an air intake silencing pot, a wind-collection cover, an impeller, an outer air barrel and a steady flow ring. As vortex flow generated at the tip part of the impeller is respectively collected by two stationary flow rings to be delivered to a back flow field through rectification, thereby, the phenomenon that vortex flow flows to the root of a blade to have diffusion is avoided, and a broad high efficiency region with high efficiency, high wind pressure is formed. Compared with an ordinary axial-flow ventilator, the utility model can improve wind pressure by 10% to 20%, the wind reversing rate reaches 60% to 70%, and the high efficiency region is higher than the high efficiency region range of other paired propeller fans without steady flow ring structure by 30%.

Description

Counter-rotating axial fan

The utility model relates to a kind of colliery that is used for and advances the counter-rotating axial fan of tunneling ventilation, tunnel tunneling ventilation down.

Counter-rotating axial fan is a kind ofly to advance tunneling ventilation, the high blast of tunnel tunneling ventilation, the novel ventilated facility of permanent wind amount ventilation operation needs down for satisfying the colliery.It is by wind-collection cover, the intake noise reduction tube, anti-explosion motor, outer air duct, first order impeller, second level impeller is formed, its working principle is: first order impeller and second level impeller are respectively by motor drives, do rotation relatively, after air-flow enters first order impeller acquisition energy, quicken its discharge by second level impeller again, thereby increased the energy of air-flow, this is to the inaccessiable high blast of common axial fan, but existing counter rotating axial fan remains an obvious defects, promptly when the blower fan load acquires a certain degree, because the blade tip on the draught fan impeller produces eddy current and spreads to root of blade rapidly, fan efficiency is sharply descended, thereby on the performance curve of blower fan, form a defective-hump district that influences its Applicable scope.

The purpose of this utility model is to provide a kind of blower fan of avoiding to load when acquiring a certain degree the counter-rotating axial fan that its efficient sharply descends.

The purpose of this utility model realizes with following technical proposals: a kind of counter-rotating axial fan is made up of anti-explosion motor, intake noise reduction tube, wind-collection cover and impeller, outer air duct, suit current stabilization ring on impeller, and the current stabilization ring is fixed on the outer air duct.The current stabilization ring is made up of preceding side ring, back side ring, outside circle, internal overarm support and current stabilization circle, the internal overarm support two ends are individually fixed on preceding side ring and the back side ring, preceding side ring and back side ring are individually fixed in circle two ends, the outside, and internal overarm support is positioned on the current stabilization circle outer peripheral surface, and connects firmly with it.Internal overarm support has 3～40.

The utility model is by increasing the current stabilization ring, impeller blade tip position produce eddy current collect by two current stabilization rings respectively and send back in the flow field by rectification, thereby avoid eddy current to spread to root of blade, reach high efficiency, high blast and broad efficient district, after tested, compare with common axial fan, can improve blast 10%～20%, exceed 8% than the common axial fan peak efficiency of preposition stator blade two-stage, exceed 4%～5% than the common axial fan peak efficiency of stator before rotor type two-stage, the inverted ventilation rate reaches 60～70%, exceeds 30% than common axial fan, than other counter rotating axial fan of no current stabilization ring structure efficiently district's scope exceed 30%.

Accompanying drawing has provided an embodiment of the present utility model.

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model current stabilization ring structure schematic representation;

Fig. 3 is the A-A cut-away view of Fig. 2;

Fig. 4 is existing counter rotating axial fan performance curve sketch;

Fig. 5 is the utility model performance curve sketch.

With reference to the accompanying drawings the utility model is described in further detail:

With reference to Fig. 1, this to the axial flow rotary blower fan by wind-collection cover 1, intake noise reduction tube 2, anti-explosion motor 3, first order impeller 5, second level impeller 7, the silencing pot 8 of giving vent to anger, preceding current stabilization ring 4, back current stabilization ring 6, outer air duct 9 is formed, first order impeller 5, current stabilization ring 4 before being set with on the second level impeller 7, back current stabilization ring 6, two current stabilization rings 4,6 are welded in respectively on the outer air duct 9, as Fig. 2, shown in Figure 3, two current stabilization rings are by preceding side ring 12, back side ring 14, outside circle 13, internal overarm support 11 and current stabilization circle 10 are formed, preceding side ring 12, back side ring 14 is welded in circle 13 two ends, the outside respectively, internal overarm support 11 is the roundlet mast, its two ends are welded in respectively on preceding side ring 12 and the back side ring 14, current stabilization circle 10 is positioned at the circumference that internal overarm support 11 forms, each root internal overarm support 11 and the welding of current stabilization circle 10 outer peripheral surface corresponding parts, like this, current stabilization circle 10 is supported on the outside circle 13, the current stabilization ring is fixing with outer air duct 9 welding by back side ring 14, front and back current stabilization ring 4,6 install after, the space position of the blade profile center line of impeller blade between preceding side ring 12 and current stabilization circle 10.The working principle of this current stabilization ring is: when the impeller high speed rotating, the swirl gas that blade tip produces is gone into current stabilization ring abdominal cavity by the gap part bit stream between flow field pressure reduction the past side ring and the current stabilization circle, swirl gas is subjected to deceleration and flow constraint in current stabilization ring abdominal cavity after, become the laminar flow structure, get back in the blower fan flow field by the current stabilization circle and the position, space of asking of back side ring then, thereby avoided eddy current to spread effectively, reached high efficiency, high blast and broad efficient district to root of blade.

Claims (3)

1. counter-rotating axial fan, it is made up of anti-explosion motor [3], intake noise reduction tube [2], wind-collection cover [1] and impeller [5], outer air duct [9], it is characterized in that: go up suit current stabilization ring [4] at impeller [5], current stabilization ring [4] is fixed on the outer air duct [9].

2. according to the described ventilator of claim 1, it is characterized in that: current stabilization ring [4] is made up of preceding side ring [12], back side ring [14], outside circle [13], internal overarm support [11] and current stabilization circle [10], internal overarm support [11] two ends are individually fixed on preceding side ring [12] and the back side ring [14], preceding side ring [12] and back side ring [14] are individually fixed in circle [13] two ends, the outside, internal overarm support [11] is positioned on current stabilization circle [10] outer peripheral surface, and connects firmly with it.

3. according to the described propeller fan of claim 2, it is characterized in that: internal overarm support [11] has 3～40.

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