CN204164032U - A kind of impeller assembly - Google Patents
A kind of impeller assembly Download PDFInfo
- Publication number
- CN204164032U CN204164032U CN201420571863.XU CN201420571863U CN204164032U CN 204164032 U CN204164032 U CN 204164032U CN 201420571863 U CN201420571863 U CN 201420571863U CN 204164032 U CN204164032 U CN 204164032U
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- CN
- China
- Prior art keywords
- impeller
- axle body
- main shaft
- radius
- level
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model proposes a kind of impeller assembly, comprise impeller and main shaft, described impeller is arranged on the two ends of main shaft respectively, described main shaft comprises the gear teeth and is arranged on coaxial the first axle body and the second axle body at gear teeth two ends, the section radius of described the first axle body is greater than the section radius of the second axle body, described impeller comprises first order impeller and second level impeller, the wheel disc radius of described first order impeller is greater than the wheel disc radius of second level impeller, described first order impeller is arranged on the first axle body, described second level impeller is arranged on the second axle body, described the first axle body and the second axle body are arranged with respectively a corresponding labyrinth seal structure.The utility model structure is more reasonable, compact, improves assembly precision and gear-driven precision, improves transmission efficiency.
Description
Technical field
The utility model relates to the accessory field of centrifugal air compressor, particularly a kind of impeller assembly.
Background technique
The speedup being rotated through gear drive of the motor in centrifugal compressor makes impeller obtain higher rotating speed.The gear drive of common two-stage centrifugal compressor generally comprises the parts such as driving gear, lower velocity shaft, thrust-bearing, radial bearing, high speed gear shaft and motor.Because motor needs drive two impellers, so the general layout adopting a lower velocity shaft two high speed shafts.Such driving gear just needs drive two high speed gear shafts, not only radial bearings, and thrust bearing increases, and when bearing runs, also needs a large amount of lubricant oil to lubricate, makes lubricant passage way system more complicated, easily make pressurized air be subject to oil pollution.The many meetings of driving mechanism number of parts have influence on assembly precision, cause the reduction of gear-driven accuracy, thus have a negative impact to transmission efficiency.The driving mechanism complex structure of such design, bulky, product cost is high.
Model utility content
The utility model object is for the above-mentioned technical problem existing for prior art, and propose one and can ensure that under any circumstance pressurized air can not be polluted by the oil, structure is simple, the impeller assembly that assembly precision is high.
For achieving the above object, the utility model proposes a kind of impeller assembly, comprise impeller and main shaft, described impeller is arranged on the two ends of main shaft respectively, described main shaft comprises the gear teeth and is arranged on coaxial the first axle body and the second axle body at gear teeth two ends, the section radius of described the first axle body is greater than the section radius of the second axle body, described impeller comprises first order impeller and second level impeller, the wheel disc radius of described first order impeller is greater than the wheel disc radius of second level impeller, described first order impeller is arranged on the first axle body, described second level impeller is arranged on the second axle body, described the first axle body and the second axle body are arranged with respectively a corresponding labyrinth seal structure, described labyrinth seal structure comprises axle sleeve, described sleeve lining is provided with the identical toroidal cavity of outer radius in several, spacing between described toroidal cavity is identical, described the first axle body and the second axle body are provided with corresponding some annulus tabs, described annulus tabs is intervally arranged on the first axle body and the second axle body by corresponding with toroidal cavity, the planar annular of described annulus tabs and the axes normal of the first axle body and the second axle body.
As preferably, described impeller is fixedly connected on the two ends of main shaft by tightening nut.
As preferably, described first order impeller and second level impeller are respectively equipped with 6-12 primary blades, in the middle of two often adjacent primary blades, are provided with a point of blade.
The utility model structure is more reasonable, compact, improves assembly precision and gear-driven precision, improves transmission efficiency.Labyrinth installed by main shaft, effectively can ensure that pressurized air is not by oil pollution in any case.On the other hand, two impellers are arranged symmetrically with, and both can be made suffered pneumatic end thrust to offset to a certain extent, thus alleviate the load of thrust bearing.By the driving mechanism of this reasonable Arrangement, the product cost of two stage compressor is reduced greatly.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of impeller assembly described in the utility model.
Fig. 2 is the structural representation of labyrinth seal structure described in the utility model and main shaft.
Embodiment
Feature of the present utility model and advantage will be described in detail by reference to the accompanying drawings by embodiment.
As shown in Figure 1-2, a kind of impeller assembly, comprise impeller 1 and main shaft 2, described impeller 1 is arranged on the two ends of main shaft 2 respectively, described main shaft 2 comprises the gear teeth 21 and is arranged on coaxial the first axle body 22 and second axle 23 body at the gear teeth 21 two ends, the section radius of described the first axle body 22 is greater than the section radius of the second axle body 23, described impeller 1 comprises first order impeller 11 and second level impeller 12, the wheel disc radius of described first order impeller 11 is greater than the wheel disc radius of the second impeller 12, described first order impeller 11 is arranged on the first axle body 22, described second level impeller 12 is arranged on the second axle body 23, described the first axle body 22 and the second axle body 23 are arranged with respectively a corresponding labyrinth seal structure 3, described labyrinth seal structure 3 comprises axle sleeve 31, described axle sleeve 31 inwall is provided with the identical toroidal cavity of outer radius in several 32, spacing between described toroidal cavity 32 is identical, described the first axle body 22 and the second axle body 23 are provided with corresponding some annulus tabs 4, described annulus tabs 4 is intervally arranged on the first axle body 22 and the second axle body 23 by corresponding with toroidal cavity 32, the planar annular of described annulus tabs 4 and the axes normal of the first axle body 22 and the second axle body 23.Described impeller 1 is fixedly connected on the two ends of main shaft 2 by tightening nut.Described first order impeller 11 and second level impeller 12 are respectively equipped with 12 primary blades, in the middle of two often adjacent primary blades, are provided with a point of blade.
Specific embodiment described herein is only to the explanation for example of the utility model structure.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Claims (3)
1. an impeller assembly, comprise impeller and main shaft, described impeller is arranged on the two ends of main shaft respectively, it is characterized in that: described main shaft comprises the gear teeth and is arranged on coaxial the first axle body and the second axle body at gear teeth two ends, the section radius of described the first axle body is greater than the section radius of the second axle body, comprise first order impeller and second level impeller, the wheel disc radius of described first order impeller is greater than the wheel disc radius of second level impeller, described first order impeller is arranged on the first axle body, described second level impeller is arranged on the second axle body, described the first axle body and the second axle body are arranged with respectively a corresponding labyrinth seal structure, described labyrinth seal structure comprises axle sleeve, described sleeve lining is provided with the identical toroidal cavity of outer radius in several, spacing between described toroidal cavity is identical, described the first axle body and the second axle body are provided with corresponding some annulus tabs, described annulus tabs is intervally arranged on the first axle body and the second axle body by corresponding with toroidal cavity, the planar annular of described annulus tabs and the axes normal of the first axle body and the second axle body.
2. a kind of impeller assembly as claimed in claim 1, is characterized in that: described impeller is fixedly connected on the two ends of main shaft by tightening nut.
3. a kind of impeller assembly as claimed in claim 1, is characterized in that: described first order impeller and second level impeller are respectively equipped with 6-12 primary blades, is provided with a point of blade in the middle of two often adjacent primary blades.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420571863.XU CN204164032U (en) | 2014-09-30 | 2014-09-30 | A kind of impeller assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420571863.XU CN204164032U (en) | 2014-09-30 | 2014-09-30 | A kind of impeller assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204164032U true CN204164032U (en) | 2015-02-18 |
Family
ID=52537724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420571863.XU Expired - Fee Related CN204164032U (en) | 2014-09-30 | 2014-09-30 | A kind of impeller assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204164032U (en) |
-
2014
- 2014-09-30 CN CN201420571863.XU patent/CN204164032U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20200930 |