CN2705635Y - Three blade Roots blower composite linear impeller - Google Patents
Three blade Roots blower composite linear impeller Download PDFInfo
- Publication number
- CN2705635Y CN2705635Y CN 200420028621 CN200420028621U CN2705635Y CN 2705635 Y CN2705635 Y CN 2705635Y CN 200420028621 CN200420028621 CN 200420028621 CN 200420028621 U CN200420028621 U CN 200420028621U CN 2705635 Y CN2705635 Y CN 2705635Y
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- Prior art keywords
- impeller
- shaped
- tooth
- flank
- cambered surface
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- Expired - Fee Related
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Abstract
The utility model provides a kind of three leaf Roots blowers compound molded lines impeller.Be characterized in: impeller is uniform to be shaped on three teeth, be shaped on smooth facing directly of being connected between the top circle cambered surface of impeller and the flank involute face, also be shaped on smooth facing directly of being connected between the concave circular arc of flank involute face and tooth waist, the tooth waist also is shaped on and the smooth convex arc surface that is connected of concaved circular cambered surface, has solved two leaf Roots air blower (involute-pin tooth circular arc profile) problem that noise is big.The utlity model has that noise is low, efficient the is high advantage of (compare with two leaf Roots blowers, on average descend 2-3dB (A), volumetric efficiency of noise improves 5%-8%).
Description
Technical field
The utility model relates to a kind of Roots air blower, the compound molded lines impeller of especially a kind of three leaf Roots blowers.
Background technique
At present homemade Roots air blower molded lines adopts involute-pin tooth circular arc profile, the ratio D/A=1.5 of the rotor of this molded lines (impeller) outer diameter D and centre distance A, its capacity utilization is 0.5185, and this involute profile is made up of the radius D/2 circular arc of tooth top portion, the involute and the recessed circular arc of waist of flank engagement.Though this impeller is simple in structure, efficient is low, noise is big, especially eddy current crack.
Summary of the invention
The utility model provides the three leaf Roots blowers that a kind of noise is low, efficient is high compound molded lines impeller for solving the technical problem that exists in the known technology.
The technological scheme that the utility model is taked for the technical problem that exists in the solution known technology is:
The compound molded lines impeller of a kind of three leaf Roots blowers is made up of the O-ring cambered surface of impeller tooth top portion, the involute face of impeller flank engagement and the arc surface of impeller tooth waist, and described impeller is evenly equipped with three engaging tooths; The arc surface of described tooth waist is the arc surface that two sections concave, convex connect; Between described top circle cambered surface and the flank involute face, all also be shaped on one section facing directly of being connected between flank involute face and the tooth waist concaved circular cambered surface.
Advantage and the good effect that the utlity model has are: owing to adopt the correction involute profile of the compound molded lines impeller of this three leaves, make capacity utilization rise to 0.528, in the whole engagement process of this impeller tooth, except that involute has partly been realized some engagement continuously, also realized engagement in tooth waist convex arc surface and tooth top portion arc surface, two local point gearing therefore occurred, reduced thereby reveal in making, improved volumetric efficiency 5%-8%, the noise 2-3dB (A) that on average descends; The D/A ratio of the compound impeller of this in addition three leaves also can reach 1.5 and do not produce interference, helps realizing the generalization of two leaves and three leaf blower fans.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is user mode figure of the present utility model.
Embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1, compound impeller is 1 uniform, symmetry is shaped on three teeth, and its shaft axis is O, and diameter is D, Pitch radius be A/2 (A be two mutually the engagement impellers be installed in centre distance in the casing 5, as shown in Figure 2).Arc surface ab makes in impeller tooth top portion 4, and impeller flank Surface of action 3 is made involute face cd.In order to make impeller tooth waist also participate in engagement, impeller tooth waist 2 is made interconnective concaved circular cambered surface ef and convex arc surface fg.Between the arc surface ab of impeller tooth top portion and impeller flank involute face cd, between impeller flank involute face cd and the impeller tooth waist concaved circular cambered surface ef, also be shaped on respectively smooth be connected face bc and de directly.
Claims (1)
1. the compound molded lines impeller of leaf Roots blower is made up of the O-ring cambered surface of impeller tooth top portion, the involute face of impeller flank engagement and the arc surface of impeller tooth waist, and it is characterized in that: described impeller is evenly equipped with three engaging tooths; The arc surface of described tooth waist is the arc surface that two sections concave, convex connect; Between described top circle cambered surface and the flank involute face, all also be shaped on one section facing directly of being connected between flank involute face and the tooth waist concaved circular cambered surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420028621 CN2705635Y (en) | 2004-03-29 | 2004-03-29 | Three blade Roots blower composite linear impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420028621 CN2705635Y (en) | 2004-03-29 | 2004-03-29 | Three blade Roots blower composite linear impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2705635Y true CN2705635Y (en) | 2005-06-22 |
Family
ID=34849721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420028621 Expired - Fee Related CN2705635Y (en) | 2004-03-29 | 2004-03-29 | Three blade Roots blower composite linear impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2705635Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102146920A (en) * | 2011-04-19 | 2011-08-10 | 四川长生鼓风机制造有限公司 | High-pressure roots blower |
| CN102767523A (en) * | 2012-08-14 | 2012-11-07 | 南通大学 | Design method of twisted Roots blower rotor profile |
| CN103195704A (en) * | 2013-04-10 | 2013-07-10 | 兰州理工大学 | Flow-constant cam pump rotor profile and generation method thereof |
| CN109578080A (en) * | 2019-02-14 | 2019-04-05 | 河北工业大学 | A kind of three leaves torsion leaf roots-type power machine electric generating apparatus |
| CN111271284A (en) * | 2020-03-16 | 2020-06-12 | 江阴全玉节能环保真空设备制造有限公司 | Three-blade rotor assembly of roots vacuum pump |
-
2004
- 2004-03-29 CN CN 200420028621 patent/CN2705635Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102146920A (en) * | 2011-04-19 | 2011-08-10 | 四川长生鼓风机制造有限公司 | High-pressure roots blower |
| CN102767523A (en) * | 2012-08-14 | 2012-11-07 | 南通大学 | Design method of twisted Roots blower rotor profile |
| CN102767523B (en) * | 2012-08-14 | 2015-01-14 | 南通大学 | Design method of twisted Roots blower rotor profile |
| CN103195704A (en) * | 2013-04-10 | 2013-07-10 | 兰州理工大学 | Flow-constant cam pump rotor profile and generation method thereof |
| CN103195704B (en) * | 2013-04-10 | 2016-06-29 | 兰州理工大学 | A kind of rotor of cam pump Profile Design method of constant flow rate |
| CN109578080A (en) * | 2019-02-14 | 2019-04-05 | 河北工业大学 | A kind of three leaves torsion leaf roots-type power machine electric generating apparatus |
| CN111271284A (en) * | 2020-03-16 | 2020-06-12 | 江阴全玉节能环保真空设备制造有限公司 | Three-blade rotor assembly of roots vacuum pump |
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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: 20050622 Termination date: 20110329 |