CN2527751Y

CN2527751Y - Superhigh speed multistage centrifugal blower

Info

Publication number: CN2527751Y
Application number: CN 01220304
Authority: CN
Inventors: 李明贤; 王庆禄; 蔡明灼
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-04-26
Filing date: 2001-04-26
Publication date: 2002-12-25
Anticipated expiration: 2011-04-26

Abstract

The utility model is an ultraspeed multistage centrifugal blower. The flow capacity of the blower is 12-15 m <3> per hour and the exhaust total pressure is 30000-35000 Pa. The blower has a structure of three levels in two moving vanes and one stationary vane. Referring to the picture 3, the blower structure comprises an air inlet 1, a first level of moving vane 2, a stationary vane 3 (also called as a guide vane), a second level of moving vane 4, a shell 5 and a motor 6. when the motor 6 is started to rotate, air enters from the air inlet 1 into the first level of moving vane 2 and obtains energy after rotation, is guided into the second level of moving vane 4 through the stationary vane 3 and obtains energy again, at the moment, the air pressure reaches 30000-35000 Pa, and then the high pressure air is discharged from an air outlet of the shell 5. The utility model can be widely applied for scientific research, environment protection, spray finishing, sampling and cleaning. Compared with the prior art, the utility model has the advantages of simple structure, reliable performance, high efficiency, convenient production, small size, light weight (3kg in total), stable operation, convenient maintenance and low cost. The blower adopts a non-carbon-brush ultraspeed motor which has single phase, 350 W of power, 20000 r per minute in speed and can work continuously.

Description

The ultra high speed multiple-stage centrifugal fan

It is 12-15m that the utility model is to provide flow ³/ h, exhaust total head are that three grades of (two moving is quiet), rotating speeds of 30000～35000Pa are that 20000r/min, impeller diameter are the blower of 125mm, are called the ultra high speed multiple-stage centrifugal fan.This blower is widely used in aspects such as scientific research, environmental protection, spraying, sampling, cleaning, sewage treatment, office service.

According to the ventilator principle of similitude, under standard state,, change rotating speed when proportion and impeller diameter are constant, then flow is directly proportional with the first power of rotating ratio, and total head is directly proportional with the quadratic power of rotating ratio; When proportion and rotating speed are constant, change impeller diameter, then flow is directly proportional with the cube of diameter ratio, and total head is directly proportional with the quadratic power of diameter ratio.Under the prior art condition, under 3000r/min synchronous machine rotating speed, reach above-mentioned pressure requirement, can take to increase impeller diameter and progression, perhaps realize with the rotating speed of extremely complicated speeder raising impeller shaft.Increase impeller diameter, then flow is directly proportional with the cube of impeller diameter ratio.Reach above-mentioned traffic requirement, then impeller diameter is little, and the impeller width is also little.Impeller diameter is little, and then its pressure is also little.Improve pressure, then need increase progression.Progression increases, its complex structure, and the impeller width is little, and its manufacturing process difficulty increases, or too small width, can't make.

In a word, under the prior art condition, realize the above-mentioned parameter requirement, its structure is quite complicated, makes difficulty, and efficient is low, and progression increases, and boundary dimension is bigger, Heavy Weight, even on manufacturing process, may be difficult to realize.

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, adopts three grades of centrifugal blowers of a kind of 20000r/min to reach flow 12～15m ³/ h, the performance parameter requirement of pressure 30000～35000Pa.It has simple in structure, efficient is high, in light weight, boundary dimension is little, but continuous operation and easy to maintenance, characteristics such as cost is low.

Accompanying drawing drawing of the present utility model is described as follows:

Fig. 1 ultra high speed multiple-stage centrifugal fan structure and air flow chart.

Fig. 2 is a movable vane rolling hitch composition.

Technical solution of the present utility model is: referring to Fig. 1, air is entered by air inlet 1, Obtain energy by one-level movable vane wheel 2, namely pressure increases, and (claims again guiding through stationary blade wheel 3 Device) imports secondary movable vane wheel 4, again obtain energy, enter casing 5, discharge from exhaust outlet.

The utility model has following advantage than prior art:

1, simple in structure, reliable, the efficient height is made simple, convenient;

2, adopt the 20000r/min motor, machine volume is little, and is in light weight, complete machine weight 3Kg;

3, running is steady, easy to maintenance;

4, price of complete machine is low, and running expense is low, and gross investment is few.

The utility model further describes in conjunction with the accompanying drawings: in Fig. 1, ultra high speed multiple-stage centrifugal fan structure is made up of intake grill 1, one-level movable vane wheel 2, stationary blade wheel 3 (claiming guider again), secondary movable vane wheel 4, casing 5, motor 6, one-level casing 7, secondary casing 8, separation sleeve 9, spacer 10, motor shaft 11 etc.One-level casing 7 is formed primary structure with one-level movable vane wheel 2; Secondary casing 8 is formed secondary structure with secondary movable vane wheel 4, simultaneously, stationary blade wheel 3 is housed on the secondary casing 8, constitutes flow guide device; Casing 5 is formed power and exhaust air outlet structure with motor 6; Separation sleeve 9, spacer 10 are the gap size a that are used for adjusting casing and movable vane wheel, and take turns the constituent element that becomes a level with casing, movable vane.The I and II casing is circular, and it connects the magnitude of interference drive fit of outer shell mutually.Equally, connecting between secondary casing 8 and the casing 5 also is the magnitude of interference drive fit of outer shell.The stationary blade wheel 3 of dress on the secondary casing 8, stationary blade wheel claims guider again, is impeller is sent the air guide next stage movable vane wheel that has pressure.

The part assembly relation of said structure is: motor 6 loads with casing 5, loads onto spacer 10 at motor shaft 11, secondary movable vane wheel 4, and secondary casing 8, separation sleeve 9, one-level movable vane wheel 2 is loaded onto one-level casing 7 and intake grill 1.

After motor 6 starts running, air is entered by intake grill 1, through 2 rotations of one-level movable vane wheel, obtain energy (promptly improving pressure) and discharge, through stationary blade wheel 3 air with pressure is imported secondary movable vane wheel 4,, obtain energy again through the impeller rotation, air pressure reaches 30000～35000Pa, and high-pressure air is discharged from the exhaust port of casing 5.

Fig. 2 is the structural drawing of movable vane wheel.The shroud 1 of impeller, hub disk 3 is the square position, blade 2 be the back to curved blade, totally 6, radius of curvature R is 40mm, impeller width b=7mm, impeller diameter D are 125mm, angle of impeller outlet alpha be 26 ° 24 '.With regard to impeller diameter still is impeller width numerical value, all is very little in this type of multiple-stage centrifugal fan square position impeller design and manufacturing.If numerical value is littler, then manufacturing process will be difficult to realize.

Motor 6 adopts non-carbon brush formula ultra high speed motor, and is single-phase, power 350W, rotating speed 20000r/min, continuous operation.

Claims

1, a kind of ultra high speed multiple-stage centrifugal fan, its flow is 12～15m ³/ h, the exhaust total head is that two of 30000～35000Pa moves a quiet tertiary structure, is normal moving commentaries on classics the under the 20000r/min at motor speed.It is characterized in that being made up of intake grill 1, one-level movable vane wheel 2, stationary blade wheel 3 (claiming guider again), secondary movable vane wheel 4, casing 5, motor 6, one-level casing 7, secondary casing 8, separation sleeve 9, spacer 10, motor shaft 11, one-level casing 7 is formed primary structure with one-level movable vane wheel 2; Secondary casing 8 is formed secondary structure with secondary movable vane wheel 4, simultaneously, stationary blade wheel 3 (claiming guider again) is housed on secondary casing 8; Separation sleeve 9, spacer 10 are the gap size a that are used for adjusting between casing and the movable vane wheel, and take turns the constituent element that becomes a level with casing, movable vane, and casing is circular, and the connection between the casing is the magnitude of interference drive fit in outer footpath all.

2, according to the described ultra high speed multiple-stage centrifugal fan of claim 1, it is characterized in that one-level, secondary movable vane wheel are the square position impellers, after 6, form to curved blade.Its angle of impeller outlet alpha be 26 ° 24 '.Blade radius of arc R is 40mm, and impeller diameter D is 125mm, impeller width b=7mm.