CN2628767Y

CN2628767Y - Vane wheel

Info

Publication number: CN2628767Y
Application number: CN 03263940
Authority: CN
Inventors: 王福荫
Original assignee: Dalong Scence & Technology Co Ltd
Current assignee: Dalong Scence & Technology Co Ltd
Priority date: 2003-05-28
Filing date: 2003-05-28
Publication date: 2004-07-28
Anticipated expiration: 2013-05-28

Abstract

The utility model provides a fan impeller, consisting of a hub and a plurality of blades located in the fringe of the hub. The hub assumes the frustum of a cone shape, and the fringe of the hub is an incline. One end of the hub is a plane; the other end is a positioning part. The outer diameter of the positioning part is bigger than that of the plane. The plane side is named the wind inspiration side, and the positioning part side is named the discharge side. The blades are arranged by equidistant on the incline, and each blade assumes the same camber line. The root of each blade is arranged along the full width of the slant of the hub, and the connecting point of the blade root and the incline is a cambered surface; the neighboring two blades forms a conduit ferrule, each ferrule assumes the same shape. The across-sectional area compare of the plane and the positioning part is between 1:1.9-1:2.3. The operating space of the fan impeller has no stallout and can provide bigger wind pressure.

Description

Vane wheel

Technical field

The utility model relates to a kind of Vane wheel, relates in particular to a kind of Vane wheel of mixed flow fan.

Background technique

Because the purposes of fan (gas fan) is very extensive, for example can be applicable to fields such as petrochemical industry, cement, chemical industry, mine, iron and steel, traffic and public hazards prevention, even in office building or general family, also can see fan.Its objective is the resistance that overcomes pipeline, required air quantity is delivered to specific place, therefore, in ventilation or dust-precipitating system, playing the part of considerable role, if can understand its characteristic and running, the effect of getting twice the result with half the effort will be arranged for handling relevant problem of ventilating.According to the direction that air-flow enters and blows out, that fan is broadly divided into is centrifugal, four kinds of diagonal flow type, mixed-flow and cross-flow types, and industrial most employing is centrifugal, diagonal flow type and mixed-flow, and is wherein the widest with the mixed flow fan purposes with higher air quantity.

No. 88215121 patent disclosure in Taiwan a kind of " improved type flabellum ", it comprises: one has the flabellum body and a gap structure of a plurality of blades, this gap structure is connected on the flabellum body, in order to the intensity of increase blade, and increases by a diffusing air quantity when the flabellum body rotates.Because the external side brim of this flabellum body is connected with gap structure, so can be when the flabellum body rotates except that wind flow originally, also increase by a diffusing air quantity that enters and discharge from side in addition, but because the characteristic of mixed flow fan is, the rotating shaft of the suction of gas and discharge and flabellum in the same way, so this structure does not meet the characteristic of mixed flow fan, and can't really change the wind flow of fan, can't improve the usability of fan.

The model utility content

The purpose of this utility model provides the Vane wheel of no stall in a kind of control panel.

For achieving the above object, the utility model provides a kind of Vane wheel, comprises that wheel hub and ring are located at a plurality of blades on these wheel hub outer periphery; Wherein, described wheel hub is circular cone shape, and its outer periphery are the inclined-plane, and an end of wheel hub is a plane, and the other end is a holding part, and the external diameter of this holding part is greater than the external diameter on described plane; A side that is positioned at the plane is called the wind suction side, and a side that is positioned at holding part is called wind and discharges side; Described blade equidistantly is provided with on the inclined-plane, and the shape of each blade is all identical and be arc shape, and the root of blade is along the whole width setting on the inclined-plane of wheel hub, and the root of blade and connecting part, inclined-plane are curved surface; Be formed with guide groove between adjacent two blades, the shape of each guide groove is all identical.Wherein, the sectional area ratio of described plane and described holding part is between 1: 1.9～1: 2.3.

Because Vane wheel of the present utility model possesses said structure, so no stall in its control panel can provide bigger blast, can improve the usability of fan greatly.

Description of drawings

Fig. 1 is the stereogram of the fan of use the utility model Vane wheel;

Fig. 2 is the stereogram of the utility model Vane wheel;

Fig. 3 is the plan view of the utility model Vane wheel;

Fig. 4 is the rear view of the utility model Vane wheel;

Fig. 5 is the side view of the utility model Vane wheel, and shows the flow direction of wind;

Fig. 6 is the P-Q characteristic curve schematic representation of the utility model Vane wheel.

Embodiment

Vane wheel of the present utility model uses on mixed flow fan, and as shown in Figures 1 to 4, this Vane wheel 1 comprises that wheel hub 2 and ring are located at a plurality of blades 3 on these wheel hub outer periphery.

Described wheel hub 2 is circular cone shape, and its outer periphery are inclined-plane 23, and an end of wheel hub is a plane 22, and the other end is a holding part 21, and the external diameter of this holding part is greater than the external diameter on described plane 22.A side that is positioned at plane 22 is called wind suction side 24, and a side that is positioned at holding part 21 is called wind and discharges side 25.The sectional area ratio of described plane 22 and described holding part 21 is between 1: 1.9～1: 2.3.

Described blade 3 equidistantly is provided with on inclined-plane 23, and the shape of each blade is all identical and be arc shape, and the root of blade is along the whole width setting on the inclined-plane 23 of wheel hub, and the root of blade and 23 connecting parts, inclined-plane are curved surface 32.Be formed with guide groove 33 between every adjacent two blades, and the shape of each guide groove 33 is all identical.

Also be provided with an axle center (not shown) on the holding part 21 of Vane wheel 1 of the present utility model, Vane wheel 1 can be assembled in the bearing of fan frame by this axle center.Energising rear blade 3 can rotate, as shown in Figure 5, can produce attraction force when blade rotation, makes air-flow from the suction side 24, through a plurality of guide grooves 33, from 25 discharges of discharge side.

Because Vane wheel of the present utility model possesses said structure, so there is not stall in the control panel, can provide bigger blast, this effect can be confirmed from following experiment.The fan test equipment that this experiment is used is " engineering experiment chamber design Co., Ltd (Engineering LaboratoryDesign; Inc.) " produces, employing be 51-1985ASHRAE (the U.S.'s heating-refrigeration-American Society of HeatingRefrigeration and Air-condition of air-conditioning association) standard.This experiment is the characteristic curve of the fan that obtains with 3100rmp, i.e. P-Q characteristic curve, and probe temperature is a room temperature, humidity is 65%RH.Wherein, abscissa is represented air quantity (CFM), and y coordinate is represented static pressure (MMWG, promptly the dynamic pressure of the total head of fan and outlet is poor).Curve A among the figure is the characteristic curve of fan of the present utility model, and curve B is the characteristic curve of the fan of prior art.As can be seen from Figure, static pressure and air quantity are inverse ratio, that is: static pressure is more little, air quantity is big more.Stall conditions are meant that air quantity changes, but the constant or impregnable state of static pressure.The control panel is meant in fan characteristic, the curve ranges of each fan.

As can be known from Fig. 6, curve A of the present utility model does not have the stall zone, and the curve B of prior art then has stall zone S, and therefore, Vane wheel of the present utility model can provide the blast bigger than prior art, can improve the usability of fan widely.

Claims

1. a Vane wheel comprises that wheel hub (2) and ring are located at a plurality of blades (3) on these wheel hub outer periphery;

Described wheel hub (2) is circular cone shape, and its outer periphery are inclined-plane (23), and an end of wheel hub is a plane (22), and the other end is a holding part (21), and the external diameter of this holding part is greater than the external diameter of described plane (22); A side that is positioned at plane (22) is called wind suction side (24), and a side that is positioned at holding part (21) is called wind and discharges side (25);

Described blade (3) on the inclined-plane (23) go up and equidistantly to be provided with, the shape of each blade is all identical and be arc shape, the root of blade is along the whole width setting on the inclined-plane (23) of wheel hub, and the root of blade and connecting part, inclined-plane (23) are curved surface (32); Be formed with guide groove (33) between adjacent two blades, the shape of each guide groove (33) is all identical;

It is characterized in that the sectional area ratio of described plane (22) and described holding part (21) is between 1: 1.9～1: 2.3.