CN203189286U - Medical fan - Google Patents
Medical fan Download PDFInfo
- Publication number
- CN203189286U CN203189286U CN 201320061248 CN201320061248U CN203189286U CN 203189286 U CN203189286 U CN 203189286U CN 201320061248 CN201320061248 CN 201320061248 CN 201320061248 U CN201320061248 U CN 201320061248U CN 203189286 U CN203189286 U CN 203189286U
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- China
- Prior art keywords
- impeller
- medical
- blower fan
- blade
- ring
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Abstract
The utility model discloses a medical fan which comprises a volute, a motor, an impeller connected to the motor through a shaft, and an air inlet, wherein the air inlet is fixed on the volute, and the air inlet and the impeller are arranged in a coaxial mode and matched in a rotating mode through a sealing mechanism. Air enters the impeller through the air inlet, the impeller rotates, blades apply work to the air to convert mechanical energy into kinetic energy and pressure energy of the air, the sealing mechanism is arranged between the impeller and the air inlet, the main purpose is to improve the sealing effect of the air inlet of the centrifugal fan, so that internal leakage of the fan is reduced, and volume fraction of the fan is improved.
Description
Technical field
The utility model relates to a kind of blower fan, is specifically related to a kind of medical centrifugal fan.
Background technique
The centrifugal fan centrifugal blower is the mechanical energy that relies on input, improves supply gas the side by side machinery of body of gas pressure, and it is a kind of driven fluid machinery.
Centrifugal blower is widely used in ventilation, dust discharge and the cooling of factory, mine, tunnel, cooling tower, vehicle, boats and ships and building; The ventilation of boiler and industrial furnace and air inducing; Cooling in the apparatus of air conditioning and the domestic electric appliance and ventilation; The oven dry of cereal and selecting and recommending; The inflation of wind-tunnel wind regime and Hovercraft and propelling etc.
Centrifugal blower is the principle that is converted to potential energy according to kinetic energy, utilizes the impeller of rotation at a high speed that gas is accelerated, and slows down, changes the flow direction then, makes kinetic energy convert potential energy (pressure) to.In the one-stage centrifugal blower fan, gas is from axially entering impeller, and gas changes over radially when flowing through impeller, enters Diffuser then.In Diffuser, gas and changing flow direction cause deceleration, this decelerating effect converts kinetic energy to the pressure energy.Increased pressure mainly occurs in the impeller, and next occurs in the diffusion process.In the multistage centrifugal blower fan, make air-flow enter next impeller with return channel, produce more high pressure.
Common centrifugal blower comprises intake grill, exhaust outlet, impeller, spiral case and motor, and motor provides power for impeller, and drives impeller is rotated, and gas enters impeller from intake grill, and gas is discharged by exhaust outlet after the spiral case buffering after impeller changes the flow direction again.The blade of impeller can be divided into two kinds of forward direction blade and backward inclined blades by the difference of sense of rotation, and the vane tip of forward direction blade tilts to the sense of rotation of blade; The vane tip of backward inclined blade is to the reversed dip of blade sense of rotation.
The centrifugal fan that is used for medical industry has the characteristics of high pressure low-specific-speed, because the low-specific-speed blower fan adopts the forward direction blade usually, its runner velocity distribution is poor, so pneumatic efficiency is low, and the gap between air inlet and impeller inlet can produce bigger leakage under the high-pressure situations, so volumetric efficiency is low.
The model utility content
The utility model provides a kind of medical blower fan, by to the control of blade passage velocity distribution and inlet seal, improves pneumatic efficiency and volumetric efficiency.
A kind of medical blower fan comprises spiral case, motor, the impeller on motor of being coupling, is fixed on the spiral case intake grill with the impeller coaxial arrangement, is rotatably assorted by sealing mechanism between described intake grill and the described impeller.
Gas is entered in the impeller by intake grill, wheel rotation, blade does work to gas, mechanical energy is converted into kinetic energy and the pressure energy of gas, between impeller and intake grill, sealing mechanism is set, main purpose is to improve the sealing effect at centrifugal blower intake grill place, reduces the blower fan internal leakage to reach, thereby reaches the purpose that improves the blower fan plot ratio.
As preferably, the blade of described impeller is backward inclined blade.
As preferably, described blade comprises spaced apart linear leaf and short blade, and an end of all blades is in the outward edge of impeller, and the other end extends towards the center of impeller.
More preferably, all blades extend to the center of impeller with identical trend.
More preferably, the length of described short blade be linear leaf length 1/2 ~ 3/4.
By the control of runner velocity distribution, weaken the jet wake structure, form the backward inclined blade impeller, adopt deviated splitter vane to improve diffusion degree in the runner, the control development of boundary layer alleviates separation, improves pressure head and the efficient of blower fan.
As preferably, described seal arrangement comprises:
Be fixed on the rotating ring on the described impeller;
Be fixed on the stationary ring on the described intake grill;
And be arranged on seal ring between described rotating ring and the stationary ring.
More preferably, described seal ring is fixed on the stationary ring, forms labyrinth sealing between described seal ring and the rotating ring.
Rotating ring is welded on the impeller and rotates with impeller, and stationary ring is fixed on the intake grill, and seal ring is fixed on the stationary ring, and seal ring and rotating ring constitute labyrinth sealing.Pressurized gas in the spiral case produce throttle effect and reach the purpose that reduces to leak when the gap by tortuous labyrinth.There are the gap in rotating ring and the seal ring of labyrinth seal, and no solid contact needn't be lubricated, and allowed thermal expansion.
As preferably, described rotating ring is the aluminium ring, and described seal ring is the low-carbon (LC) steel loop, can play effect lubricated and that reduce to wear and tear during axial float.
Compared with prior art, the utlity model has following beneficial effect:
Existing medical blower fan adopts the forward direction blade usually, and its runner velocity distribution is poor, so pneumatic efficiency is low, and the gap between air inlet and impeller inlet can produce bigger leakage under the high-pressure situations, so volumetric efficiency is low.
The utility model is by the control of blade passage speed, adopt the backward inclined blade molded lines to reach purpose efficiently, intake grill and impeller inlet place at draught fan impeller adopt labyrinth sealing, its main performance is to improve the sealing effect at centrifugal blower intake grill place, reaching the internal leakage that reduces blower fan, thereby improve blower fan volumetric efficiency purpose.Comprehensive above structural feature, this medical centrifugal fan has high pressure, characteristics of high efficiency.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of sealing mechanism of the present utility model.
Fig. 3 is the plan view of the utility model impeller.
Fig. 4 is the right elevation of the utility model impeller.
Reference character is as follows shown in the figure:
1-intake grill 2-sealing mechanism 3-impeller
4-spiral case 201-stationary ring 202-seal ring
203-rotating ring 301-shroud 302-hub disk
303-linear leaf 304-short blade.
Embodiment
As shown in Figure 1, a kind of medical blower fan, be centrifugal fan, comprise spiral case 4, motor (not shown), be coupling on motor impeller 3 and be fixed on intake grill 1 on the spiral case 4, intake grill 1 is common awl arc intake grill, impeller 3 is arranged in spiral case 4, intake grill 1 and impeller 3 coaxial arrangement all adopt conventional Placement between motor, spiral case 4, impeller 3 and the intake grill 1, and intake grill 1 is rotatably assorted by sealing mechanism 2 with the air intake place of impeller 3.
The structure of sealing mechanism 2 as shown in Figure 2, comprise stationary ring 201, rotating ring 203 and seal ring 202, stationary ring 201 is fixed on the intake grill 1, adopt the welding means of fixation in the present embodiment, be on the edge at air intake place of the stationary ring 201 close impeller 3 that is weldingly fixed on intake grill 1, rotating ring 203 is fixed on the edge, air intake place of impeller 3, adopt welding fixing in the present embodiment, between stationary ring 201 and rotating ring 203, seal ring 202 is set, seal ring 202 is fixed on the stationary ring 201, form labyrinth sealing between seal ring 202 and the rotating ring 203, the sealing of sealing formula can be to realize by labyrinth sealing of the prior art.
The structure of impeller 3 as shown in Figure 3 and Figure 4, impeller 3 adopts double shrouded wheels in the present embodiment, comprise shroud 301, hub disk 302 and be arranged on shroud 301 and hub disk 302 between blade.
Blade is backward inclined blade, and its structure comprises linear leaf 303 and short blade 304 as shown in Figure 4, linear leaf 303 and short blade 304 are arranged at interval, the length of short blade 304 be linear leaf 303 length 1/2 ~ 3/4, in the present embodiment, short blade 304 be roughly linear leaf 303 length 2/3.
The top of all blades all is positioned at the outer edge of impeller 3, and the other end of all blades extends to the center of impeller 3 with same trend, and namely the outer edge of the top of all blades and impeller 3 is on same toroidal surface.
Same trend refers to that the tilt angle of all blades is identical, and namely the angle between the tangent direction of the circumference of the tangent direction of all blades and the outward edge intersection of impeller 3 and this intersection is identical.
Gas enters the impeller 3 from intake grill 1, impeller 3 rotates, blade does work to gas, and mechanical energy is converted into kinetic energy and the pressure energy of gas, and blade adopts backward inclined blade, control by the runner velocity distribution, weaken the jet wake structure, deviated splitter vane improves diffusion degree in the runner, the control development of boundary layer, alleviate separation, improve pressure head and the efficient of blower fan.Pressurized gas in the spiral case produce throttle effect and reach the purpose that reduces to leak when the gap by tortuous labyrinth.
The above only is preferable implementation example of the present utility model, is not limited to the utility model, and is all within the utility model spirit and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (7)
1. medical blower fan comprises spiral case, motor, the impeller on motor of being coupling, is fixed on the spiral case intake grill with the impeller coaxial arrangement, it is characterized in that, is rotatably assorted by sealing mechanism between described intake grill and the described impeller.
2. medical blower fan according to claim 1 is characterized in that, the blade of described impeller is backward inclined blade.
3. medical blower fan according to claim 2 is characterized in that, described blade comprises spaced apart linear leaf and short blade, and an end of all blades is in the outward edge of impeller, and the other end extends towards the center of impeller.
4. medical blower fan according to claim 3 is characterized in that, all blades extend to the center of impeller with identical trend.
5. medical blower fan according to claim 4 is characterized in that, the length of described short blade be linear leaf length 1/2 ~ 3/4.
6. according to the described medical blower fan of the arbitrary claim of claim 1 ~ 5, it is characterized in that described seal arrangement comprises:
Be fixed on the rotating ring on the described impeller;
Be fixed on the stationary ring on the described intake grill;
And be arranged on seal ring between described rotating ring and the stationary ring.
7. medical blower fan according to claim 6 is characterized in that, described seal ring is fixed on the stationary ring, forms labyrinth sealing between described seal ring and the rotating ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320061248 CN203189286U (en) | 2013-02-04 | 2013-02-04 | Medical fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320061248 CN203189286U (en) | 2013-02-04 | 2013-02-04 | Medical fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203189286U true CN203189286U (en) | 2013-09-11 |
Family
ID=49106148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320061248 Expired - Lifetime CN203189286U (en) | 2013-02-04 | 2013-02-04 | Medical fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203189286U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386372A (en) * | 2018-01-05 | 2018-08-10 | 佛山杰致信息科技有限公司 | A kind of intelligent power saving blower fan system based on three-dimensional flow impeller |
| CN111828376A (en) * | 2020-07-09 | 2020-10-27 | 李电豹 | Centrifugal fan impeller |
-
2013
- 2013-02-04 CN CN 201320061248 patent/CN203189286U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386372A (en) * | 2018-01-05 | 2018-08-10 | 佛山杰致信息科技有限公司 | A kind of intelligent power saving blower fan system based on three-dimensional flow impeller |
| CN111828376A (en) * | 2020-07-09 | 2020-10-27 | 李电豹 | Centrifugal fan impeller |
| CN111828376B (en) * | 2020-07-09 | 2022-04-15 | 沈力风机股份有限公司 | Centrifugal fan impeller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130911 |
|
| CX01 | Expiry of patent term |