CN203374497U

CN203374497U - Centrifugal ventilator

Info

Publication number: CN203374497U
Application number: CN201320409594.2U
Authority: CN
Inventors: 胡金城
Original assignee: WUHAN KANGHUA GRAIN MACHINE PLANT
Current assignee: WUHAN KANGHUA GRAIN MACHINE PLANT
Priority date: 2013-07-10
Filing date: 2013-07-10
Publication date: 2014-01-01
Anticipated expiration: 2023-07-10

Abstract

The utility model discloses a centrifugal ventilator. The centrifugal ventilator comprises an impeller, wherein the impeller comprises a conical front disc and a flat-plate-type rear disc, connecting vanes are evenly and circumferentially distributed between the conical front disc and the flat-plate-type rear disc and comprise long vanes and short vanes which are distributed evenly and alternatively, the long vanes and the short vanes are straight vanes, and the included angle beta of air outlets of the long vanes and the short vanes is 65 degrees +/-1 degree. The centrifugal ventilator resolves the problem that while high pressure and large wind amount are needed in the grain processing process, the pressure is surplus but the wind amount is not enough, has the advantages of being convenient to install and repair, high in efficiency, low in energy consumption, low in cost, large in wind amount, wide in performance regulation range, stable in work, reliable in operation, and capable of regulating the wind amount, and is suitable for type matching and selection of a rice polishing machine and a grain mechanism power conveying mechanism.

Description

A kind of centrifugal fan

Technical field

The utility model belongs to grain processing equipment, is specifically related to a kind of centrifugal fan.

Background technique

Grain processing equipment is also the old product of the fifties at the 6-30 type blower fan of selecting at present, because efficiency is low, pressure is not high, and air quantity is less than normal, adds and man-hour easily occurs putty, falls the problems such as material, be difficult to meet the technological requirement of grain processing, simultaneously blower fan in use for some time, during the black dirt that is detained on the periodic cleaning impeller, must be taken wind net and blower fan suction chamber apart, it is very inconvenient to clear up, keep in repair, and also greatly affects the working life of blower fan simultaneously.And the corresponding a kind of air quantity of a kind of blower fan of model, can't directly change air force, caused the accommodation of blower fan little.

Disclose a kind of centrifugal fan in Chinese patent specification ZL201020120755, this Impeller for Centrifugal Fan comprises linear leaf and short blade, and linear leaf and short blade alternately are evenly arranged, and the exhaust outlet angle β of blade is 90 ° ± 1 °.This centrifugal fan is in the situation that General Promotion pressure value increases air quantity, solved the supporting demand of various new grain machinery high pressure, Wind Volume, but for the large-scale polishing rice machine equipment of constantly updating after regenerating, this blower fan but seems that pressure has a surplus, deficiency in draught, be difficult to the technological effect that reaches satisfied.

The model utility content

The utility model proposes a kind of centrifugal fan, solved above-mentioned blower fan in use pressure have a surplus and the problem of deficiency in draught and the centrifugal fan of air quantity is provided in the situation that provides a kind of total head to decrease.

The technical solution of the utility model is achieved in that

A kind of centrifugal fan, comprise supporting frame, connect motor on support frame as described above, the output shaft of described motor connects impeller through casing, described impeller is arranged in described casing, described casing is provided with intake grill and exhaust outlet, described impeller comprises taper shroud and plate hub disk, distribute and be connected blade along even circumferential between described taper shroud and described plate hub disk, described blade comprises linear leaf and the short blade of evenly alternately arranging, described blade is prismatic blade, and the described exhaust outlet angle β of described linear leaf and described short blade is 65 ° ± 1 °.

As further improvement of the utility model, described linear leaf three limits are H0:H1:H2=31:13.8:9.3, and wherein H0 is the length of linear leaf, and H1 is the high-end height of linear leaf, and H2 is the height of linear leaf low side.

Further, the length of described short blade is 1/3rd of described linear leaf length.

Reduce in order better to realize the purpose that total head increases fan delivery, the sheet number of described linear leaf and described short blade is all 12.

This uses novel beneficial effect: the utility model adopts the straight connection type structure, the blade of centrifugal fan adopts linear leaf and the short blade alternately be evenly arranged, and the exhaust outlet angle β of linear leaf and short blade is 65 ° ± 1 °, and blade adopts prismatic blade, make this blower fan to increase fan delivery in the situation that blower press reduces, this type fan performance regulation range is wide, energy-efficient, there are installation and maintenance convenient, be applicable to the supporting type selecting of polishing rice machine and grain machinery power conveying equipment.

The accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is structural representation of the present utility model;

Fig. 2 profile schematic diagram of the present utility model;

Fig. 3 blade structure schematic diagram;

Fig. 4 impeller is arranged schematic diagram;

Fig. 5 linear leaf plan view;

Fig. 6 short blade plan view;

Fig. 7 linear leaf plan view;

Fig. 8 short blade plan view.

In figure, 1, supporting frame, 2, damping disc, 3, motor, 4, casing, 5, deashing door, 6, impeller, 7, air intake pipe, 8, shroud, 9, hub disk, 10, linear leaf, 11, short blade

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiments.Embodiment based in the utility model, those of ordinary skills, not making under the creative work prerequisite the every other embodiment who obtains, belong to the utility model; The scope of protection.

With reference to Fig. 1, the bottom of supporting frame 1 is provided with damping disc 2, top is connected with motor 3, and the output shaft of motor 3 connects impeller 6 through casing 4, and impeller 6 is located in casing 4, casing 4 is provided with intake grill and exhaust outlet, intake grill consists of the air intake pipe 7 of the air intake with frustum and arc outlet air end, forms air inlet chamber, can before intake grill, be provided with in use the damper of quantity-adjustable, so that regulate the air quantity of blower fan, thereby adapt to various working.

With reference to Fig. 2, casing 4 has deashing door 5, when regularly being cleared up black dirt and maintenance, must not tear Air outlet net and blower fan air inlet chamber open, only opens deashing door 5 and gets final product, and is conducive to improve the utilization efficiency of blower fan, extends the working life of blower fan.

With reference to Fig. 3 and Fig. 4, impeller 6 comprises taper shroud 8 and plate hub disk 9, be alternately distributed and connect linear leaf 10 and short blade 11 along even circumferential between taper shroud 8 and plate hub disk 9, the sheet number is all 12, and the exhaust outlet angle β of linear leaf 10 and short blade 11 is 65 ° ± 1 °.The shape of casing 4, be that the aerodynamics sketch map is of a size of: F1=4.5:F2=5.5:F3=6.5:F4=7.5:R=56, the outlet diameter Φ 4 of the intake grill largest diameter 1 of air inlet chamber, minimum diameter Φ 3 and air inlet chamber, the inlet diameter Φ 2 of impeller, its ratio is respectively Φ 1: Φ 2: Φ 3: Φ 4=57:50.4:46:48.5, the height B 3 of casing outlet length B7 and casing exit width B6 and impeller, its ratio is: B7:B6:B3=50:25:18.5.

With reference to Fig. 5 to Fig. 8, linear leaf 10 and short blade 11 are all prismatic blades, prismatic blade is quadrilateral, and wherein the H0:H1:H2=31:13.8:9.3 of linear leaf, allow fluctuation in ± 0.5 scope, three limits of short blade are H3:H4:H5=10.3:10.8:9.3, wherein H4Yu limit, limit H5, limit H3 is vertical, and H1He limit H0 is vertical for H2, limit, limit, and H0 is the length of linear leaf, H1 is the high-end height of linear leaf, and H2 is the height of linear leaf low side.

Working principle of the present utility model: by the driven by motor vane rotary, blade in impeller forces gas rotating, to air work, can increase, gas is under the effect of centrifugal force, to the impeller surrounding, throw away, can convert speed to pressure energy by whirlpool type casing, after gas in impeller is discharged, pressure in impeller is lower than the air intake pipe internal pressure, and new gas is intake impeller under the effect of pressure difference, and gas is just constantly discharged continuously in impeller, collected and get rid of from exhaust outlet by whirlpool type casing, reach certain pressure and air quantity.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.

Claims

1. a centrifugal fan, comprise impeller, it is characterized in that: described impeller comprises taper shroud and plate hub disk, distribute and be connected blade along even circumferential between described taper shroud and described plate hub disk, described blade comprises linear leaf and the short blade of evenly alternately arranging, described linear leaf and described short blade are prismatic blades, and the exhaust outlet angle β of described linear leaf and described short blade is 65 ° ± 1 °.

2. centrifugal fan as claimed in claim 1, it is characterized in that: described linear leaf three limits are H0:H1:H2=31:13.8:9.3, and wherein H0 is the length of linear leaf, and H1 is the high-end height of linear leaf, and H2 is the height of linear leaf low side.

3. centrifugal fan as claimed in claim 1 or 2, it is characterized in that: the length of described short blade is 1/3rd of described linear leaf length.

4. centrifugal fan as claimed in claim 1, it is characterized in that: the sheet number of described linear leaf and described short blade is all 12.