CN2358254Y

CN2358254Y - Double-suction type adjustable booster fan specially adapted for cement vertical kiln

Info

Publication number: CN2358254Y
Application number: CN 98232527
Authority: CN
Inventors: 梁新理
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-03-02
Filing date: 1998-03-02
Publication date: 2000-01-12
Anticipated expiration: 2008-03-02

Abstract

The utility model relates to a centrifugal blower specially used for a cement vertical kiln. The utility model is characterized in that every vane is designed with double surfaces, the length of the vanes is longer than one section of the flanges of the vanes, and thus input air is increased; the bottom of the bent inner sides of the vanes is provided with a flow baffle plate used for reducing a gap between the vanes and increasing the flow rate of the vanes, and one side air inlet can be blocked for boosting pressure between 15 % and 30 % when the pressure needs to be boosted. The utility model has the advantage that the rotation speed of a fan can not be increased during pressure boost, and the utility model adapts to the characteristic of changing work in cement manufacture.

Description

The cement in vertical kiln adjustable booster fan of double-sucking type

The utility model relates to a kind of air bells conditioner, particularly a kind of centrifugal fan of cement in vertical kiln special use.

In manufacture of cement, shaft kiln is big owing to its power with roots blower, installation and maintenance inconvenience, and it is superseded to have become at present.Emerging centrifugal fan, this kind ventilator incoming air area is little, flow velocity is high, noise is big, resistance is big, waste energy.Find " a kind of cement in vertical kiln high pressure centrifugal blower " (CN2203370Y) according to retrieval, cooperate to increase air output with deviated splitter vane, air quantity is regulated and is adopted electric actuator to finish, and this machine also is furnished with muffler part, and it is a bit complicated that structure seems.

In the cement industry, what of fan pressure are power of fan outfit size depend primarily on, because the characteristics of exchanging work in the manufacture of cement, sometimes need to realize, strengthen blower pressure, then must realize by improving rotating speed by the pressure that strengthens blower fan, be certain to increase power of fan so, conversely.The utility model purpose is to design the adjustable booster fan of a kind of double suction, takes two air intake modes, its vent area is under equal conditions increased be twice, incoming air area increase be twice after, have the certain significance to reducing power of fan, simultaneously, require when boost pressure, to need not to improve rotation speed of fan.

The utility model structure is: a kind of cement in vertical kiln adjustable booster fan of double-sucking type, have power source (1) and the output shaft (4) that links to each other with power source (1), this output shaft is fixed on the bearing support (2) by bearing (3), be fixed with impeller (5) on the output shaft the other end, several blades (6) are fixed on the circumference of impeller equably, blade cover (7) is fixed on the bearing support (2), blade (6) exceeds one section of impeller (5) flange plate for two-sided and its length, simultaneously become bent inside bottom and also be fixed with a spoiler (8) at blade (6), blade cover (7) be circular and its wall height suitable with blade height.Also be provided with an active catch aerofoil at the blade cover outer side wall.

The utility model key is that blade changes bilateral structure into, blade and length exceed the impeller flange plate simultaneously, both sides air intake simultaneously like this, increase air output, when the need boost pressure, block an intake grill, because bending blade inside bottom spoiler reduces space between fan blade, increase air velocity around here, can improve pressure 15-30% not improving under the rotation speed of fan situation.

Description of drawings:

Fig. 1 is the utility model structural representation;

Fig. 2 arranges schematic representation for the utility model fan blade;

Fig. 3 is the two-sided blade schematic representation of the utility model;

Embodiment: a kind of cement in vertical kiln adjustable booster fan of double-sucking type, have power source (1) and the output shaft (4) that links to each other with power source (1), power source adopts three phase motor, its this output shaft is by on bearing (3) fixed bearing block (2), output shaft is not held and is fixed with impeller (5), several blades (6) are fixed on the blade wheel circumference equably, lobe numbers is decided according to the impeller diameter size, being generally 10 ± 2 is advisable, blade cover (7) is fixed on bearing support (2) and goes up and blade is surrounded, blade (6) exceeds one section on the method dish of impeller (5) for two-sided its length, the length that exceeds is pressure size and deciding optionally, pressure is greatly then long slightly, and pressure is little then short slightly, has not only increased air output but also strengthened pressure.Also be fixed with a spoiler (8) in blade (6) curved interior bottom simultaneously, this spoiler and blade are fixed with one better, because spoiler has reduced the impeller clearance, make flow velocity raising around here, have reached the supercharging purpose.Blade cover (7) for circular and its wall high with blade height quite to guarantee enough air outputs.

Also be provided with an active catch aerofoil at the blade cover outer side wall, when boost pressure, push barge board, block an intake grill, power of fan, the corresponding minimizing about 20% of air quantity like this, and pressure can improve 15-30%.

Claims

1, a kind of cement in vertical kiln adjustable booster fan of double-sucking type, have power source (1) and the output shaft (4) that links to each other with power source (1), this output shaft is fixed on the bearing support (2) by bearing (3), be fixed with impeller (5) on the output shaft the other end, several blades (6) are fixed on the circumference of impeller equably, blade cover (7) is fixed on the bearing support (2), it is characterized in that: blade (6) exceeds one section of impeller (5) flange plate for two-sided and its length, simultaneously become bent inside bottom and also be fixed with a spoiler (8) at blade (6), blade cover (7) be circular and its wall height suitable with blade height.

2, booster fan according to claim 1 is characterized in that also being provided with an active catch aerofoil at the blade cover outer side wall.