CN203067344U - Auxiliary impeller device between bearing and housing of centrifugal fan - Google Patents
Auxiliary impeller device between bearing and housing of centrifugal fan Download PDFInfo
- Publication number
- CN203067344U CN203067344U CN 201320027929 CN201320027929U CN203067344U CN 203067344 U CN203067344 U CN 203067344U CN 201320027929 CN201320027929 CN 201320027929 CN 201320027929 U CN201320027929 U CN 201320027929U CN 203067344 U CN203067344 U CN 203067344U
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- bearing
- rotating shaft
- auxiliary impeller
- auxilliary impeller
- auxilliary
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Abstract
The utility model discloses an auxiliary impeller device between a bearing and the housing of a centrifugal fan, belongs to the technical field of shaft seal of centrifugal fans and aims to overcome shortcomings that the temperature at the bearing of a centrifugal fan used by a food processing enterprise at present is rather high and detonation is easily caused by dust accumulation at the bearing. The auxiliary impeller device comprises a casing, a rotating shaft and a bearing box, wherein an auxiliary impeller is mounted on the rotating shaft between the casing and the bearing box; and the blade rotation direction of the auxiliary impeller ensures that airflow output when the auxiliary impeller rotates along with the rotating shaft is blown to the side of the bearing box. The auxiliary impeller device is suitable for assembly of high-power centrifugal fans.
Description
Technical field
The utility model relates to a kind of axle encapsulation technique of centrifugal blower, particularly relates to the auxilliary impeller unit between a kind of centrifugal blower bearing and shell.
Background technique
In food-processing industry, a lot of operations and occasion will be used blower fan, especially need to use some centrifugal blowers.According to the character of food-processing industry, normally technology is more extensive, and raw material mostly is bulk cargo and quantity is big, so used centrifugal blower generally all is the big moving rate blower fan that flow is big, pressure head is higher, as: be used for dust discharge, ventilation, conveying material etc.Because the rotating shaft of centrifugal blower is the work of cantilever support impeller, and impeller often can produce inhomogeneous radial thrust because of the instability of operating mode in the course of the work.This inhomogeneous radial thrust not only can cause the vibration of rotating shaft, also can form an extra moment and put on the bearing, makes between bearing and the axle and strengthens frictional force because of the imbalance rotation.So centrifugal blower is when work, the temperature of rotating shaft and bearing can be very high; Food service industry has its particularity again; in the air-flow that centrifugal blower is carried with powder all be inflammable and explosive food quality particulate, what have also has a grease, these powders accumulate in the bearing place of centrifugal blower; because the specific surface area of powder is very big, deflagration accident having very easily takes place.Therefore, there are the food processing enterprises of the high-power centrifugal blower of a lot of uses can establish the accumulated powder situation that the special messenger is responsible for observing the bearing place, in case of necessity, in time shut down and carry out gumming and allow axle and bearing cooling.Obviously, do the increase that can bring the recruitment cost and the reduction of manufacturing efficiency like this.
Summary of the invention
The purpose of this utility model provides the auxilliary impeller unit between a kind of centrifugal blower bearing and shell, and it is very high and the deficiency of deflagration accident having can accumulated powder easily takes place to overcome the used centrifugal blower bearing place temperature of present food processing enterprises.
The utility model is achieved by following technical proposals.
The utility model comprises casing, rotating shaft and bearing housing, auxilliary impeller is equipped with in described rotating shaft between described casing and described bearing housing, and the blade sense of rotation of described auxilliary impeller is that the satisfied air-flow of exporting when described auxilliary impeller rotates with described rotating shaft blows to described bearing housing on one side.Described auxilliary impeller is the impeller of similar axial-flow blower, it is when rotating with described rotating shaft, will produce one air-flow and blow at its described rotating shaft and bearing in addition, give the cooling of axle and bearing on the one hand, their temperature is remained on the not really high level; Another side is to form airflow layer at axle and bearing surface, makes the powder can't land, more can not gather, and this has just fundamentally been avoided the generation of deflagration accident having.In addition, described auxilliary impeller can produce negative pressure towards one side of described casing at it when rotated, and the negative pressure of the gap location of this negative pressure and described rotating shaft and described casing offsets, and then can play the better seal effect.
In the utility model, because centrifugal blower has composition and flow and the change of pressure head aspect of carrying fluid, for the operating mode that can adapt to main frame changes, described auxilliary impeller also can change flow thereupon, so, the blade of described auxilliary impeller is half regulating type blade, and it can be by the position of locating stud between manual change's fan blade and the wheel hub, and the setting angle of adjusting vane is regulated flow in certain scope.Safety and the air-flow that allows described auxilliary impeller export are more concentrated when operating for the workman, and at the protective case that is peripherally equipped with of described auxilliary impeller, for the ease of the dismounting of described protective case, described protective case is that two semicircle slit bamboo or chopped woods are closed up formula, is screwed respectively on described casing.
Against existing technologies, the beneficial effects of the utility model are:
Can effectively strengthen the ventilation and heat of centrifugal blower rotating shaft and bearing, avoid because accumulated powder causes deflagration accident having, be conducive to safety in production; Improve the sealability between axle, the shell simultaneously, reduced inleakage, improved the volumetric efficiency of blower fan.
Description of drawings
Fig. 1 is structural representation of the present utility model, and Fig. 2 is the A-A cut-away view of Fig. 1.Among the figure: 1, casing, 2, rotating shaft, 3, bearing housing, 4, auxilliary impeller, 5, protective case.
Embodiment
The utility model will be further described below in conjunction with accompanying drawing and embodiment.
The wheel hub of auxilliary impeller 4 of the present utility model can be made the endoporus full circle lasso identical with rotating shaft 2 external diameters, and the screw that holds out against of symmetry is established on both sides, also can make the Hough circle that cuts open formula in pairs, and both sides fixedly are loaded in the rotating shaft 2 with bolt and nut.The blade of auxilliary impeller 4 can be made of plastic, because the flow that auxilliary impeller 4 is carried needn't be very big, plastic blade is enough on structural strength, but itself is in light weight, and being additional to dynamic balancing in the rotating shaft 2, to influence meeting very little, very easy adjustment.The diameter of protective case 5 and height have much relations for 4 output gas flow flows of auxilliary impeller and its formed vacuum degree of gap location between rotating shaft 2 and casing 1, should determine size by test according to different practical occasions.
Claims (4)
1. the auxilliary impeller unit between a centrifugal blower bearing and shell, comprise casing, rotating shaft and bearing housing, it is characterized in that, auxilliary impeller is equipped with in described rotating shaft between described casing and described bearing housing, and the blade sense of rotation of described auxilliary impeller is that the satisfied air-flow of exporting when described auxilliary impeller rotates with described rotating shaft blows to described bearing housing on one side.
2. the auxilliary impeller unit between a kind of centrifugal blower bearing according to claim 1 and shell is characterized in that, the blade of described auxilliary impeller is half regulating type blade.
3. the auxilliary impeller unit between a kind of centrifugal blower bearing according to claim 1 and shell is characterized in that, at the protective case that is peripherally equipped with of described auxilliary impeller.
4. the auxilliary impeller unit between a kind of centrifugal blower bearing according to claim 3 and shell is characterized in that, described protective case is that two semicircle slit bamboo or chopped woods are closed up formula, is screwed respectively on described casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320027929 CN203067344U (en) | 2013-01-17 | 2013-01-17 | Auxiliary impeller device between bearing and housing of centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320027929 CN203067344U (en) | 2013-01-17 | 2013-01-17 | Auxiliary impeller device between bearing and housing of centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203067344U true CN203067344U (en) | 2013-07-17 |
Family
ID=48766134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320027929 Expired - Fee Related CN203067344U (en) | 2013-01-17 | 2013-01-17 | Auxiliary impeller device between bearing and housing of centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203067344U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843616A (en) * | 2018-07-23 | 2018-11-20 | 深圳市能源环保有限公司 | A kind of odour seal device of garbage incinerating power plant centrifugal blower |
-
2013
- 2013-01-17 CN CN 201320027929 patent/CN203067344U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843616A (en) * | 2018-07-23 | 2018-11-20 | 深圳市能源环保有限公司 | A kind of odour seal device of garbage incinerating power plant centrifugal blower |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20140117 |