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Flow guiding device for two-way reversible axial flow fan

An axial flow fan and guide device technology, which is applied to the components of the pumping device for elastic fluids, mechanical equipment, machines/engines, etc. Axial flow fans cannot be used to achieve the effect of completely consistent aerodynamic characteristics, completely consistent aerodynamic performance, and improved static pressure lift capacity.

Active Publication Date: 2017-01-18
苏莫明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conventional guide vane design cannot meet the requirements of two-way reversible working conditions, so it cannot be used for reversible axial flow fans.

Method used

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  • Flow guiding device for two-way reversible axial flow fan
  • Flow guiding device for two-way reversible axial flow fan
  • Flow guiding device for two-way reversible axial flow fan

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] This embodiment is a flow guiding device for a two-way reversible axial flow fan. The diameter of the impeller of the two-way reversible axial flow fan is D=2m, the impeller working speed n=980rmp, and the design flow Q=60m 3 / s, design total pressure P=950Pa, number of impeller blades Z=10, chord length L at the top of the blade top =250mm, hub ratio k=0.45. Tip installation angle b AN = 15°. As shown in Figure 1, guide devices are installed on both sides of the two-way reversible axial flow fan impeller.

[0068] Two sets of flow guiding devices are arranged antisymmetrically on both sides of the impeller along the axial direction, and each set of flow guiding devices is composed of multiple sets of flow guiding components. Each group of deflector components includes a curved deflector, a connecting plate 2 and a flat deflector 3. In this embodiment, the flow guiding device on each side of the impeller is composed of 9 groups of flow guiding components. The 9 groups ...

Embodiment 2

[0081] This embodiment is a flow guide device for a bidirectional reversible axial flow fan. The diameter of the bidirectional reversible axial flow fan is D=2m, the impeller working speed n=980rmp, and the design flow Q=60m 3 / s, design total pressure P = 1250Pa, number of impeller blades Z = 12, chord length L at the top of the blade top =250mm, hub ratio k=0.45. Tip installation angle b AN = 12°. As shown in Figure 1, guide devices are installed on both sides of the two-way reversible axial flow fan impeller.

[0082] Two sets of guide devices are arranged antisymmetrically on both sides of the impeller along the axial direction, and each set of guide devices is composed of 9 groups of guide components. Each group of deflector components includes a curved deflector, a connecting plate 2 and a flat deflector 3. In this embodiment, 9 groups of guide components are evenly distributed along the inner circumference of the bidirectional reversible axial flow fan casing, as shown...

Embodiment 3

[0093] This embodiment is a flow guide device for a bidirectional reversible axial flow fan. The diameter of the bidirectional reversible axial flow fan is D=2m, the impeller working speed n=980rmp, and the design flow Q=60m 3 / s, design total pressure P=950Pa, number of impeller blades Z=10, chord length L at the top of the blade top =250mm, hub ratio k=0.45. Tip installation angle b AN = 15°. As shown in Figure 1, guide devices are installed on both sides of the two-way reversible axial flow fan impeller.

[0094] Two sets of guide devices are arranged antisymmetrically on both sides of the impeller along the axial direction, and each set of guide devices is composed of 9 groups of guide components. Each group of deflector components includes a curved deflector, a connecting plate 2 and a flat deflector 3. In this embodiment, the flow guiding device on each side of the impeller is composed of 9 groups of flow guiding components. The 9 groups of guide components are evenly ...

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Abstract

The invention discloses a guide set of a bidirectional reversible axial-flow fan. The guide set comprises two guide units mounted on two sides of an impeller of the reversible axial-flow fan in anti-symmetry; each guide component is composed of a curved guide plate and at least two planar guide plates, which are mutually overlapped in the axial direction and mutually staggered in the peripheral direction; the cured guide plates of each guide unit are close to a rotating impeller, serving as an inflow side. The guide set has the advantages that leaving-velocity loss caused by integration, on the section of the outlet of the fan, of kinetic energy 0.5 Rho C<u3><2> formed by a rotational velocity component C<u3> of an outlet of the fan can be greatly recycled, the guide set has the aerodynamic characteristic, complete reversibility, to be specific, the fan has completely uniform aerodynamic characteristics no matter when the impeller positively or reversely rotates; by recycling the leaving-velocity loss, whole-pressure efficiency of the fan is increased by 10% to 20%, static pressure rise capacity of the reversible axial-flow fans of same model is greatly improved, the bidirectional reversible axial-flow fan is imparted surging resistance, and a common anti-surging ring structure on existing reversible axial-flow fans is omitted.

Description

Technical field [0001] The invention relates to a flow guiding device of a bidirectional reversible axial flow fan with a symmetrical airfoil. Background technique [0002] The two-way reversible axial flow fan refers to a fan installed with a symmetrical or anti-symmetrical airfoil impeller structure. At the design speed, no matter the forward or reverse rotation fan has the same aerodynamic characteristics, that is, it has the same aerodynamic characteristics. Pneumatic parameters such as pressure, flow, efficiency, power and so on. [0003] Conventional reversible axial flow fans usually install "anti-surge ring" structures on both sides of the casing at the top of the blade. This special feature of the reversible fan makes the total pressure, flow and total pressure efficiency of the reversible fan very low compared with the one-way axial flow fan of the same size, and the power consumption is very large. Even the advanced reversible axial flow fans at home and abroad, their ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/54
CPCF04D27/02F04D29/541
Inventor 苏莫明洪灵
Owner 苏莫明
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