CN202746286U - Novel centrifugal fan - Google Patents
Novel centrifugal fan Download PDFInfo
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- CN202746286U CN202746286U CN 201220437369 CN201220437369U CN202746286U CN 202746286 U CN202746286 U CN 202746286U CN 201220437369 CN201220437369 CN 201220437369 CN 201220437369 U CN201220437369 U CN 201220437369U CN 202746286 U CN202746286 U CN 202746286U
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- impeller
- centrifugal fan
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Abstract
The utility model provides a novel centrifugal fan, belongs to the technical field of fans, and solves the problems of short service life and easy-to-dust performance in a conventional centrifugal fan. The centrifugal fan comprises a rack, a volute casing provided with an air inlet and an air outlet and arranged at the rack, and a motor arranged on the rack, wherein the air inlet is arranged at the side part of the volute casing; an impeller driven by the motor is arranged in the volute casing and located on one side of the air inlet, and takes the shape of a ratchet wheel; and a tapered rectification cylinder is arranged at the air inlet. The centrifugal fan provided by the utility model has the advantages of long service life, excellent pneumatic performance, high efficiency and the like.
Description
Technical field
The utility model belongs to the blower fan technical field, relates to a kind of centrifugal blower, particularly a kind of centrifugal fan for high dust or mass transport.
Background technique
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 cooling and the mass transport of factory, mine, tunnel, cooling tower, vehicle, boats and ships and building, and the oven dry of the cooling in the ventilation of boiler and industrial furnace and air inducing, the apparatus of air conditioning and the domestic electric appliance and ventilation and cereal and selecting and recommending etc.As everyone knows, centrifugal blower generally comprises housing, has the spirality air channel on the housing, be provided with outlet in its end, medium position in the spirality air channel is provided with intake grill, and centrifugal blower also comprises impeller, drives the dynamic structure of this wheel rotation, and this power is generally motor.
Mainly there is following defective in domestic centrifugal blower centrifugal blower for delivery of high dust at present:
1. draught fan impeller makes the life-span short
Originally lack the working life of draught fan impeller, its main cause is the granule dust height of the conveying gas of centrifugal blower.Because the airflow direction of centrifugal blower becomes 90 ° to turn to, these 90 ° turn at impeller blade air flow inlet place and finish.Flowing through, powder dust particle is not the runner that enters of being obedient in the dust-containing airflow of impeller channel, but because the effect of inertia, the entry end that rushes at blade at a high speed and the joint of blade inlet end and wheel disc make this position often be subject to heavy wear.Because contain the particles of different sizes in the dusty gas, high-speed flight has larger energy, cause wearing and tearing with collision and the friction of impeller.
Manufactory prolongs life in order to prolong into the impeller use, adopt high-abrasive material to make draught fan impeller, increase impeller damaged part sheet metal thickness, be subject to the abrading section at impeller and spread the weldering high-abrasive material, ground the position in the impeller part and add the measures such as wearing plate, all in the working life that has prolonged in varying degrees impeller, these measures all are to bear passively the impact of dust and wearing and tearing, thereby do not have the new breakthrough progress.
2. impeller stops up, collects ash at work easily
This type of draught fan impeller is that completely shrouded impeller is in the majority at present, and this blower fan collects ash and obstruction easily at the process Leaf of conveying material, and destruction of balance causes affecting the normal operation of complete blower.
3. efficient is low, noise is high, fan performance is stable not, wastes energy
A. at present this type of blower fan peak efficiency many power consumption is large, and high efficient area is narrow about 70%, large flow district pressure coefficient is low, therefore, fan operation usually causes undercapacity when large flow district, affects system's operation.
B. the intake grill place is without vortex shield, and in the fan operation process, efficient is low, and the stream swirl noise is high.
4. shaft end seal is changed inconvenient
The shaft end seal of this type of blower fan is whole shape at present, therefore when repair and replacement, unload impeller and just can keep in repair, and wastes time and energy, and maintenance cost is high.
5. it is unreasonable that spiral case wind tongue is in the gap of impeller, so pneumatic noise is large in the fan operation process, and the hyoplastron wearing and tearing are severe, and casing shortens working life.
Summary of the invention
The purpose of this utility model is to have the problems referred to above for existing technology, a kind of long service life, aeroperformance good (can cover the performance of original blower fan fully) have been designed, efficient is high, efficient district is wide, noise is low, the shaft end seal repair and replacement are convenient, the brand-new centrifugal blower of reasonable in design.
The purpose of this utility model can realize by following technical proposal:
This centrifugal blower, comprise frame, be located at the volute housing with intake grill and exhaust outlet at frame place and be located at motor on the frame, described intake grill is positioned at the sidepiece of volute housing, be provided with the impeller that is driven by said motor in the described volute housing, it is characterized in that, the side that described impeller is positioned at intake grill is ratchet shape, and is provided with the taper flow regulating barrels at described intake grill place.
Utilize impeller to be positioned at the eddy current separation principle of intake grill one side, after dust enters into impeller, carry out of short duration pressurization and namely enter the vortex, the gentle miscarriage of granule dust estranged from, thereby increased the wear-resisting effect of impeller, prolonged the working life of blower fan.
In above-mentioned centrifugal blower, the side that described impeller is positioned at motor is ratchet shape.
In above-mentioned centrifugal blower, between above-mentioned motor and volute housing, be provided with a bearing housing on the described frame, be equipped with a main shaft in the described bearing housing, one end of described main shaft is connected with the output shaft of motor by coupling, the other end of described main shaft stretches in the sidewall of above-mentioned volute housing, and above-mentioned impeller set is located on this main shaft.
This bearing housing plays a supportive role to main shaft, makes the main shaft can be crooked in rotation process.
In above-mentioned centrifugal blower, offer through hole on the described volute housing, above-mentioned main shaft is located in this through hole, and is provided with divergence type shaft end seal spare in described through hole, described divergence type shaft end seal spare links to each other with casing, with the contact segment good seal of main shaft.
This divergence type shaft end seal spare can prevent that the harmful dust gas leak leaks in the volute housing, and the personal safety at scene when guaranteeing the operation of blower fan, and sealing is divergence type is on-the-spotly changed conveniently, need not to pull down impeller.
In above-mentioned centrifugal blower, described volute housing is to wait basis set side, Archimedes spiral shell body.
In above-mentioned centrifugal blower, the entrance point of described impeller blade is added with Wear-resistant Treatment.Make its with the process of abrasion of particles in, wearing and tearing are reduced to minimum, effectively prolonged the working life of impeller, thereby increased the working life of blower fan.
In above-mentioned centrifugal blower, described wearing layer is fixed on the above-mentioned impeller by welding manner.
In above-mentioned centrifugal blower, all and casing, the junction plane of intake grill all adopts encapsulation process
Compared with prior art, this centrifugal blower has the following advantages:
1. draught fan impeller makes the life-span long
This blower fan is owing to adopted advanced Dynamic Simulation Analysis and the flow field of gas-solid biphase flow carried out the analog simulation three dimensional analysis, and optimizing flow passage design, change the angle of washing away of air-flow, simultaneously dish before and after the impeller is designed to the ratchet type shape, utilize the tail vortex principle of air-flow, destroy the movement locus of airflow dust, thereby improved the wear-resisting effect of this blower fan
This blower fan becomes ratchet shape for taking full advantage of the eddy current separation principle with Impeller Design, make dust enter into impeller after, carry out of short duration pressurization and namely enter vortex separation zone, dust produce to separate, thereby has increased the wear-resisting effect of impeller, has prolonged the working life of blower fan;
2. impeller is at work without blocking phenomenon
Become traditional double shrouded wheel ratchet shape impeller, utilize the eddy current separation principle, upset material telemechanical track, avoid blocking phenomenon to occur.
3. efficient is high, noise is low, fan performance is stable, it is wide efficiently to distinguish, energy saving
1) this blower fan since adopted advanced Dynamic Simulation Analysis and gas-solid biphase flow the flow field carry out the analog simulation three dimensional analysis, and optimized runner design, change the angle of washing away of air-flow, improved the impeller pneumatic efficiency.
2) add a taper flow regulating barrels at the intake grill place, the efficient of the blower fan of Effective Raise has reduced eddy current crack, and its noise figure is than original low (3-8) dB.
3) through after the above measure, the efficient of this blower fan increases substantially peak efficiency 85 than original fan efficiency and reaches above, therefore, and good energy-conserving effect.
4) high efficient area is wide, and large flow district pressure coefficient is high, and its performance covers original fan performance fully, and therefore, blower fan is exerted oneself when operation can satisfy system requirements, can guarantee system safety operation.
4. the shaft end seal repair and replacement are convenient
The shaft end seal of blower fan is designed to separable type, therefore when repair and replacement, need not to unload impeller, time saving and energy saving, maintenance cost is low
5. used dynamic simulation and to the emulation three dimensional analysis in the flow field of gas-solid biphase flow, and through detailed theory calculating, optimize the Streamline Design of spiral case, adopted and waited based method to draw spiral of Archimedes spiral case line, choose reasonable the gap at snail tongue and impeller outer diameter place, it is minimum that the noise of air-flow is dropped to, and the easily-worn position of snail tongue has been taked the abrasionproof measure, thereby guaranteed reduction noise and anti abrasive purpose.
Description of drawings
Fig. 1 is the front view of a kind of preferred embodiment of providing of the utility model.
Fig. 2 is the side view of a kind of preferred embodiment of providing of the utility model.
Among the figure, 1, frame; 2, housing; 3, motor; 4, impeller; 5, flow regulating barrels; 6, bearing housing; 7, main shaft; 8, coupling; 9, divergence type shaft end seal spare.
Embodiment
Below be specific embodiment of the utility model and by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
As shown in Figure 1, this centrifugal blower comprises frame 1, is located at the volute housing 2 with intake grill and exhaust outlet at frame 1 place and is located at motor 3 on the frame 1 that intake grill is positioned at the sidepiece of volute housing 2, is provided with the impeller 4 that is driven by motor 3 in the volute housing 2.As shown in Figure 1, between motor 3 and volute housing 2, be provided with a bearing housing 6 on the frame 1, be equipped with a main shaft 7 in the bearing housing 6, one end of main shaft 7 is connected with the output shaft of motor 3 by coupling 8, the other end of main shaft 7 stretches in the sidewall of volute housing 2, and impeller 4 is set on this main shaft 7.
Concrete, as shown in Figure 1, offer through hole on the volute housing 2, main shaft 7 is located in this through hole, and be provided with divergence type shaft end seal spare 9 in the through hole, divergence type shaft end seal spare 9 is set on this main shaft 7 and with volute housing 2 bolts and is connected, and this divergence type shaft end seal spare 9 can prevent that harmful dust etc. from revealing by this through hole and enter atmosphere, effective guarantee on-the-spot leakage safety.
Such as figure and shown in Figure 2, the side that impeller 4 is positioned at intake grill is ratchet shape, and is provided with taper flow regulating barrels 5 at the intake grill place, and the side that impeller 4 is positioned at motor 3 also is ratchet shape.It utilizes impeller 4 to be positioned at the eddy current separation principle of intake grill one side, after dust enters into impeller 4, carry out of short duration pressurization and namely enter the vortex, dust produces gas solid separation, thereby increased the wear-resisting effect of impeller 4, also avoid simultaneously the obstruction of impeller in operation process now to want to occur, thereby prolonged the working life of blower fan.
Volute housing 2 in the present embodiment is Archimedes spiral housing 2.
In order to strengthen the wear resistance of impeller 4, being positioned at the increase of intake grill place at impeller 4 has wearing layer.This wearing layer has improved the intensity of impeller 4 to a certain extent, make its with the process of dust collision in, wearing and tearing are reduced to minimum, effectively prolonged the working life of impeller 4, thereby increased the working life of blower fan.Concrete, the wearing layer in the present embodiment is fixed on the impeller 4 by welding manner.
Specific embodiment described herein only is to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Although this paper has more used 1, frame; 2, housing; 3, motor; 4, impeller; 5, flow regulating barrels; 6, bearing housing; 7, main shaft; 8, coupling; 9, the term such as divergence type shaft end seal spare, but do not get rid of the possibility of using other term.Using these terms only is in order to describe more easily and explain essence of the present utility model; They are construed to any additional restriction all is contrary with the utility model spirit.
Claims (7)
1. centrifugal fan, comprise frame (1), be located at the volute housing (2) with intake grill and exhaust outlet that frame (1) locates and be located at motor (3) on the frame (1), described intake grill is positioned at the sidepiece of volute housing (2), be provided with the impeller (4) that is driven by said motor (3) in the described volute housing (2), it is characterized in that, the side that described impeller (4) is positioned at intake grill is ratchet shape, and is provided with taper flow regulating barrels (5) at described intake grill place.
2. a kind of centrifugal fan according to claim 1 is characterized in that, the side that described impeller (4) is positioned at motor (3) is ratchet shape.
3. a kind of centrifugal fan according to claim 1 and 2, it is characterized in that, be positioned on the described frame (1) between above-mentioned motor (3) and the volute housing (2) and be provided with a bearing housing (6), be equipped with a main shaft (7) in the described bearing housing (6), one end of described main shaft (7) is connected with the output shaft of motor (3) by coupling (8), the other end of described main shaft (7) stretches in the sidewall of above-mentioned volute housing (2), and above-mentioned impeller (4) is set on this main shaft (7).
4. a kind of centrifugal fan according to claim 3, it is characterized in that, offer through hole on the described volute housing (2), above-mentioned main shaft (7) is located in this through hole, and be provided with divergence type shaft end seal spare (9) in described through hole, described divergence type shaft end seal spare (9) is set on this main shaft (7).
5. a kind of centrifugal fan according to claim 1 and 2 is characterized in that, described volute housing (2) is Archimedes spiral housing (2).
6. a kind of centrifugal fan according to claim 1 and 2 is characterized in that, described impeller (4) is positioned at above-mentioned intake grill place increase wearing layer.
7. a kind of centrifugal fan according to claim 6 is characterized in that, described wearing layer is fixed on the above-mentioned impeller (4) by welding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220437369 CN202746286U (en) | 2012-08-30 | 2012-08-30 | Novel centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220437369 CN202746286U (en) | 2012-08-30 | 2012-08-30 | Novel centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202746286U true CN202746286U (en) | 2013-02-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220437369 Expired - Fee Related CN202746286U (en) | 2012-08-30 | 2012-08-30 | Novel centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202746286U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102815537A (en) * | 2012-08-30 | 2012-12-12 | 浙江兴益风机电器有限公司 | Novel centrifugal fan |
| CN105179269A (en) * | 2015-10-12 | 2015-12-23 | 嘉善县汾湖铸钢厂 | High-pressure centrifugal fan |
-
2012
- 2012-08-30 CN CN 201220437369 patent/CN202746286U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102815537A (en) * | 2012-08-30 | 2012-12-12 | 浙江兴益风机电器有限公司 | Novel centrifugal fan |
| CN105179269A (en) * | 2015-10-12 | 2015-12-23 | 嘉善县汾湖铸钢厂 | High-pressure centrifugal fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130220 Termination date: 20150830 |
|
| EXPY | Termination of patent right or utility model |