CN201982337U

CN201982337U - High-speed centrifugal blower

Info

Publication number: CN201982337U
Application number: CN2011200981220U
Authority: CN
Inventors: 高进
Original assignee: ZHEJIANG TONGYUAN BLOWER Co Ltd
Current assignee: ZHEJIANG TONGYUAN BLOWER Co Ltd
Priority date: 2011-04-07
Filing date: 2011-04-07
Publication date: 2011-09-21
Anticipated expiration: 2021-04-07

Abstract

The utility model provides a high-speed centrifugal blower. The high-speed centrifugal blower comprises a scroll casing and an impeller; an impeller shaft is in rigid connection with a motor shaft on the same axial line; and a motor is a high-speed permanent magnet DC (Direct Current) motor. The impeller shaft and the high-speed permanent magnet DC motor shaft are in rigid connection on the same axial line to form an impeller driving mechanism. Compared with the prior art, the high-speed centrifugal blower eliminates the efficiency decrease due to the frequency conversion or a speed-increasing gearbox through the high rotation speed of the DC motor.

Description

The high-speed centrifugal blower

Technical field

The utility model relates to a kind of high-speed centrifugal blower, especially the drive motor of high-speed centrifugal blower belongs to pump technical field in the mechanical engineering.

Background technique

Blower leads to/the air feed machinery as a kind of, is widely used in all trades and professions, especially in fields such as oil, chemical industry, metallurgy, Aeronautics and Astronautics, environmental protection a large amount of uses is arranged.Blower has various ways, and centrifugal blower is comparatively use always a kind of, and centrifugal blower is made up of spiral case and impeller, and impeller shaft is connected with motor shaft.The high-speed centrifugal blower is meant that the impeller shaft rotating speed reaches the centrifugal blower of 10000 ~ 30000r/min.Because the impeller shaft rotating speed height of high-speed centrifugal blower, thus normally with the AC motor output shaft through step-up gear rear driving impeller shaft, so just have that efficient is low, noise is big, bulky deficiency.Especially mechanical efficiency counts the mechanical efficiency and the efficiency of motor of gear speedup case, is about 50 ~ 60% under the overall efficiency normal condition of high-speed centrifugal blower so.As not using step-up gear, then must carry out frequency conversion to the power supply of AC motor, then also can cause the not high problem of efficient, and make control complicated more.

Summary of the invention

At above-mentioned deficiency, the utility model will provide a kind of high efficiency high-speed centrifugal blower exactly.

The high-speed centrifugal blower that the utility model provides has spiral case and impeller, and impeller shaft is connected with motor shaft, and said motor is the high-speed permanent magnetic direct current generator, and it is that diaxon carries out rigid connection on same axis that said impeller shaft is connected with motor shaft.

The high-speed centrifugal blower that the utility model provides, rigid connection on same axis constitutes impeller drive with impeller shaft and high-speed permanent magnetic direct current arbor, compared with prior art, the utility model utilizes the high rotating speed of direct current generator and has eliminated the decrease in efficiency that causes because of frequency conversion or step-up gear.

The power line of said high-speed permanent magnetic direct current generator is provided with voltage or regulating current device, and with the control motor speed, this control mode is convenient with the rotating speed of control AC motor.Can cancel simultaneously to remedying the vane apparatus of the inconvenient adjusting air output that is provided with of control, efficient is further improved.

The motor shaft of said high-speed permanent magnetic direct current generator is installed on the motor casing with pneumatic bearing, makes to lubricate, not exist frictional loss, motor shaft floatability good, thereby has further improved efficient.

Description of drawings

Fig. 1 is the utility model one embodiment's a axial view, among the figure: 1-spiral case body, 2-intake grill, 3-honeycomb duct, 4-impeller, 5-exhaust outlet, 6-impeller shaft;

Fig. 2 is A among Fig. 1---A is to sectional view, among the figure: 1-spiral case body, 2-intake grill, 3-honeycomb duct, the 4-impeller, 5-exhaust outlet, 6-impeller shaft, 7-motor thimble portion, the 8-stator, 9-motor shaft, 10-rotor, 11-rear bearing block one, the 12-pneumatic bearing, 13-rear bearing block two, 14-thrust-bearing, 15-thrust disc, the 16-thrust-bearing, 17-back end cover for motor, 18-pneumatic bearing, 19-front-end bearing pedestal, 20-motor front cover, 21-spiral case bonnet, M-motor.

Embodiment

One high-speed centrifugal blower as shown in Figure 1, 2, mainly comprises: high-speed permanent-magnet brushless direct current generator, spiral case and impeller constitute.Spiral case is made of snail machine body 1 and spiral case bonnet 21, has in the spiral case body air inlet through hollow shaft mouth 2 and exhaust outlet 5 radially are set on the honeycomb duct 3 spiral case bodies.Impeller 4 is installed in the honeycomb duct, and impeller is fixed on the impeller shaft 6, and impeller casting self also has one section axial region, between this axial region and the spiral case bonnet mechanical sealing mechanism is arranged.The high speed direct current generator is harmonious with front cover 20 and spiral case bonnet and is installed on the spiral case, and the impeller shaft rear end is inserted motor shaft 9 and done coaxial fixing.Form motor casing by motor thimble portion 7 and rear end cover 17.Motor stator 8 is the windings that are fixed in the motor thimble portion, and electronics rotor 10 is the permanent magnetic steels that are fixed on the motor shaft, and voltage-operated device is arranged on the power line.In motor casing, also be provided with a front-end bearing pedestal and two rear bearing blocks, front-end bearing pedestal 19 and rear bearing block one 11 each radial force with a pneumatic bearing 18,12 supporting motor axles wherein, rear bearing block 2 13 then will be fixed on thrust disc 15 on the axle the be clipped in the middle axial force of bearing motor shaft and the axial float that limits motor shaft by two thrust-

bearings

14,16.

During work, the motor high speed rotating, impeller sucks gas from suction port, discharge through relief opening; Blower has saved the gear speedup case equipment in the traditional drum blower fan system by motor direct-drive, reduces the component of traditional drum blower fan system, simplifies the formation of traditional drum blower fan system, reduces because the loss in efficiency that the gear up link causes.Adopt high-speed air suspension magneto simultaneously, improved electric efficiency.The rotating speed of rotor and blower wheel relies on the decision of supply voltage output, can cancel the loss in efficiency that the transport drum blower fan causes with the guide vane wheel of restriction air output.Drive with the DC electrical source after the Ac inversion, inverter efficient is 90%, and the utility model blower overall efficiency is 70% ~ 80%.

Claims

1. a high-speed centrifugal blower has spiral case and impeller, and impeller shaft is connected with motor shaft, it is characterized in that said motor is the high-speed permanent magnetic direct current generator, and it is that diaxon carries out rigid connection on same axis that said impeller shaft is connected with motor shaft.

2. high-speed centrifugal blower as claimed in claim 1 is characterized in that the power line of said high-speed permanent magnetic direct current generator is provided with voltage or regulating current device.

3. high-speed centrifugal blower as claimed in claim 1 or 2 is characterized in that the motor shaft of said high-speed permanent magnetic direct current generator is installed on the motor casing with pneumatic bearing.