CN2232500Y

CN2232500Y - Large centrifugal ventilator

Info

Publication number: CN2232500Y
Application number: CN 95233419
Authority: CN
Inventors: 李金松
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-17
Filing date: 1995-03-17
Publication date: 1996-08-07
Anticipated expiration: 2005-03-17

Abstract

The utility model relates to an electromechanical ventilating apparatus which is the technological improvement for the present large-scale centrifugal ventilating apparatus, particularly a large centrifugal ventilator. The utility model is composed of a motor (4), an impeller (2), an impeller flange (11), an impeller central disc (15), a blade (6) and a casing (1) of a fan, wherein, the outside surface of the casing of the motor is in a concave-convex shape, and a motor stator is connected with a motpr shaft through a key (3). The size of the fan is big and is more than number 6. The power of the motor is high and is more than 20 kilowatt. The utility model has the advantages of compact structure, small volume, light weight, little transmission noise and low manufacture cost, which can be widely applied to air-conditioning match, hotels, meeting places, theatres, manufacturing shops, etc. for ventilating with multi-change speed and long-term operation.

Description

A kind of large centrifugal ventilator

The utility model relates to a kind of ventilation equipment of electromechanical, is the improvement to existing large centrifugal ventilation equipment structure, and its name is called a kind of large centrifugal ventilator.

In the prior art, the form that drags of centrifugal blower roughly is divided into two classes: a class is an internal rotor type, directly or indirectly drags draught fan impeller by motor shaft; Another kind of is external rotor type, and draught fan impeller external rotor direct and motor combines as a whole and drags.The former structure complexity, running noises is big; The latter is because motor housing is direct and impeller combines as a whole, be installed in volute of blower inside jointly, be subjected to that installing space is little, the restriction of motor volume finite sum structural strength, the maximum plane No. of this type of blower fan does not surpass No. 5, and promptly peak output does not surpass 14 kilowatts, but this class blower fan structure compactness, easy for installation, noise is low, and the efficient height is widely used in ventilation, purification and air-conditioning system.In the existing life, many occasions are again to need powerful centrifugal blower so urgently, as, the ventilation of occasions such as air-conditioning is supporting, hotel, meeting-place, Movie theater and manufacturing shop.In order to maximize favourable factors and minimize unfavourable ones, this occasion adopts the external rotor type centrifugal blower more, but because this class blower fan, weight is too big, and volume is too big, and unit weight refrigerating capacity and per unit volume refrigerating capacity are too little, and along with power of motor increases, the two will reduce gradually, and motor moves axially too big, be difficult to fix, vanes fixed is difficulty also, and auxiliary material are too many, cost height, connector lug all are exposed in the middle of the air, and danger is too big, do not meet electric erection code, so its using effect is unsatisfactory.

The purpose of the utility model design, be to avoid above-mentioned the deficiencies in the prior art, and provide a kind of large centrifugal ventilator, adopt external rotor electric machine, the impeller of blower fan external rotor direct and motor combines as a whole and drags, in order to reduce the weight of motor, do not reduce using effect again, motor housing adopts concavo-convex structure, and the utility model is mainly by motor, blade, the limit dish, protecting cover, adjust cushion block, composition such as motor housing and flow blower casing, designed blower fan plane No. is big, and power of motor is big, compact structure, volume is little, in light weight, rotational noise is little, low cost of manufacture, and it is supporting to can be widely used in air-conditioning, the hotel, the meeting-place, the ventilation in place such as Movie theater and manufacturing shop, but multi-change speed, long-term operation is used.

To achieve these goals, the utility model can adopt following measure to realize, described a kind of large centrifugal ventilator, form by motor, impeller, impeller limit dish, impeller mid-game, blade and Fan casing, motor is an external rotor electric machine, the outer surface of outer cover concave-convex surface of motor, motor stator and motor shaft key connecting.Reach with this and to reduce weight and do not reduce and be subjected to force intensity, be convenient to peace open motor stator and motor shaft connecting with key, changed the Bolt Connection of prior art, prior art is a scyewed joint, processing difficulties, the utility model is a key connecting, has increased linking intensity, and connecting hole is convenient to processing.

To achieve these goals, the utility model can also adopt following measure to realize, described a kind of large centrifugal ventilator, the two ends of motor shaft are all installed an axle head protecting cover and are adjusted cushion block, all between motor shaft end face and axle head protecting cover, motor shaft and flow blower casing link by a support each adjustment cushion block.

To achieve these goals, the utility model can also adopt following measure to realize, described a kind of large centrifugal ventilator, two side dishes and a mid-game are arranged on the impeller, and the intermediate portion of blade is fixed in " recessed " shape patchhole of mid-game, is inserted in after the bending two ends of blade in the meniscate mounting hole of side panel, after blade end comes out from the mounting hole internal return, be attached on the wall of side dish, be welded on then on the wall of side dish, also can rivet.

To achieve these goals, the utility model can also adopt following measure to realize, described impeller side dish and motor shaft end protecting cover have that three above spokes are auxiliary to be connected, and an outlet box is installed in the volute of blower side, and an outlet box and a speed regulator link.Reach the purpose of safety, speed governing therefrom.

To achieve these goals, the utility model can adopt following measure to realize, described impeller diameter is between 700 millimeters～2000 millimeters, and the rated output power of external rotor electric machine is greater than 20 kilowatts.

In order to be illustrated more clearly in the utility model, below in conjunction with accompanying drawing the utility model is done to illustrate further:

Fig. 1 sees the half sectional view of the utility model structural representation for blower fan mouth direction;

Fig. 2 is the structural representation of the utility model from axial direction;

Fig. 3 is limit, the side dish 11 on the utility model impeller 2, and the mounting hole 17 of the blade 6 of a crescent shape is arranged above it;

Fig. 4 is the mid-game 15 on the utility model impeller 2, and the blade insertion hole 16 of a spill is arranged above it.

In order more to clearly demonstrate the utility model, in conjunction with the embodiments the utility model is described further with reference to the accompanying drawings:

Embodiment:

A kind of large centrifugal ventilator described in the utility model, be by flow blower casing 1, impeller 2, motor 4, motor housing 15, blade 6 is formed, impeller 2 is equipped with 11 and impeller mid-games 15 of two impeller limit dishes, the mounting hole 17 that one crescent shape is arranged above the limit dish 11, one blade insertion hole 16 is arranged in the mid-game 15, motor 4 is the outward rotation type motor, the shell of motor 4 is from blower fan mouth direction, concave-convex surface, motor stator connects with key 3 with motor shaft, the two ends of motor shaft are all installed a hubcap 12 and are adjusted cushion block 8, adjust cushion block 8 between motor shaft end face and axle head protecting cover 12, motor shaft and flow blower casing 1 link by support 7, blade 6 passes the patchhole 16 of mid-game 15, be embedded in after the bending two ends in the mounting hole 17 of limit dish 11, after the end of blade 6 comes out in the mounting hole 17, be attached on the wall of side dish, be welded on then on the wall of side dish, also can rivet, the side dish 11 of impeller 2 and motor shaft end cap 12 have 10 auxiliary connections of spoke more than three, an outlet box 13 is installed in volute of blower 14 sides, outlet box 13 links to each other with a speed regulator, volute of blower 14 surfaces have an angle steel to protect frame 9, by welding the two is associated in together securely, the diameter of impeller (2) is between 700mm～2000mm, and the external rotor electric machine rated output power is greater than 20 kilowatts.

Enforcement of the present utility model has following advantages:

Designed blower fan plane No. is big, and power of motor is big, can surpass more than 20 kilowatts structure Compactness, volume is little, and is in light weight, and rotational noise is little, and low cost of manufacture can be used widely Supporting in air-conditioning, the ventilation in the places such as hotel, meeting-place, cinema and workshop, But multi-change speed, long-term operation is used.

Claims

1, a kind of large centrifugal ventilator of forming by motor (4), impeller (2), impeller limit dish (11), impeller mid-game (15), blade (6) and flow blower casing (1), motor (4) is an external rotor electric machine, it is characterized in that the outer surface of outer cover concave-convex surface of motor (4) and be connected as one that motor stator connects with key (3) with motor shaft with impeller.

2, according to the described a kind of large centrifugal ventilator of claim 1, its feature is all installed an axle head protecting cover (12) and is adjusted cushion block (8) in the two ends of motor shaft, each is adjusted cushion block (8) and all is positioned between motor shaft end face and the axle head protecting cover (12), and motor shaft and flow blower casing (1) link by a support (7).

3, according to the described a kind of large centrifugal ventilator of claim 2, it is characterized in that two side dishes (11) and a mid-game (15) are arranged on the impeller (2), the intermediate portion of blade (6) is fixed in the spill patchhole (16) of mid-game (15), after the bending two ends of blade (6), be inserted in the meniscate mounting hole (17) of side panel (11), after blade (6) end comes out from mounting hole (17) internal return, be attached on the wall of side dish (11), be welded on then on the wall of side dish (11), also can rivet.

4, according to the described a kind of large centrifugal ventilator of claim 3, it is characterized in that described impeller (2) side dish (11) and motor shaft end protecting cover (12) have auxiliary connection of spoke (10) more than three, volute of blower (14) is gone up an outlet box (13) is installed, and outlet box (13) links to each other with a speed regulator.

5, according to the described a kind of large centrifugal ventilator of claim 1, it is characterized in that impeller (2) diameter between 700 millimeters to 2000 millimeters, the rated output power of outer rotor motor (4) is greater than 20 kilowatts.