CN2194424Y - Rotator for liquid conveying pump - Google Patents
Rotator for liquid conveying pump Download PDFInfo
- Publication number
- CN2194424Y CN2194424Y CN 94228516 CN94228516U CN2194424Y CN 2194424 Y CN2194424 Y CN 2194424Y CN 94228516 CN94228516 CN 94228516 CN 94228516 U CN94228516 U CN 94228516U CN 2194424 Y CN2194424 Y CN 2194424Y
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- China
- Prior art keywords
- rotor
- shape
- curve
- pair
- peak
- Prior art date
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a rotor of a vacuum pump, a blower and a fluid conveying pump. A pair of rotors are respectively fixed on a shaft and are respectively arranged in each casing, and the engaging structure of the pair of rotors are in an engaging form which uses a peak shape curve as the conjugate curve of the engaging structure. The shape of the engaging structure is that a valley shape line is in a trilobate rectilinear shape. The rotors of a pump or a blower can reach high rotational speed, and the utility model is used for different use conditions, such as large pumping amount.
Description
The utility model relates to a kind of rotor of vacuum pump, blower and liquid delivery pump.
In the existing comparable technology of having grasped:
1. 23 mechanical booster pumps (Roots pump) in " mechanical engineering manual " the 77th piece of pump, the vacuum pump 77-124 page or leaf, the molded lines of rotor kind is a lot, as circular arc type, involute-type, gerotor type etc.Molded lines of rotor is used involute more at present.Its molded lines design class is like Roots blower.
2. 593 pages of (four) Roots blowers such as " engineering goods catalogue " the 7th valve, blower fan and Jaeger blower, Roots blower, the ∞ type that its rotor section geometric is an involute.
3. " vacuum science and technology journal " the 11 rolled up the fourth phase the 228th page of " a kind of new seriation roots pump rotor molded lines " (receive December 28 nineteen ninety), and molded lines of rotor is boundary, the outer title peak type curve of pitch circle with the pitch circle, the title paddy type curve in the pitch circle.As whole molded lines is a smooth curve, then this two-part molded lines conjugate curve each other.Propose the oval envelope line style molded lines of seriation in the literary composition, its peak type curve is an elliptic curve, and paddy type curve is its envelope.The ratio of mentioning ellipse long and short shaft in the literary composition is 1 o'clock, promptly becomes round envelope line style molded lines, is the external line style that generally adopts.And the gerotor type molded lines must guarantee D/C=1.5, and D is a rotor length, and C is a pitch diameter, and the C value equals two rotor centre distance values.
4. " mechanical engineering manual " the 77th piece of the 8th chapter water-ring pump, the shortcoming of water-ring pump is that efficient is lower, is generally 30-50%, is up to 55%.Working medium is a liquid, and its hydraulic efficiency is between 0.50-0.70.
From several molded lines of rotor of above-mentioned introduction as seen, except that circle envelope line style rotor, all the other involute-types, cycloid line style and oval envelope line style rotor, no matter be the peak molded lines, or paddy molded lines, manufacturing be difficulty all, because can not adopt method of loci or generating cutting cutting; And circle envelope line style rotor, its processing technology is several more much easier than all the other, demonstrates good manufacturability, design is easy to characteristics, and this line style rotor paddy molded lines can adopt generating cutting processing, and the peak molded lines can be processed with method of loci, but, during with method of loci processing peak type circular arc line, must very careful " cross and cut ", at the intersection point place of two sections different straight lines, not that cutting is not in place, it is excessive to cut exactly, takes place to cut, because actual cutter is not made cutting edge with point.
The purpose of this utility model is to provide with three leaf straight lines, four leaf straight lines or circular arc, the straight line paddy type curve as a pair of cooperation rotor, makes rotors such as pump or blower can reach high rotating speed, greatly the amount of taking out and being used under the different service conditions.
The purpose of this utility model realizes by following measure:
It is made up of a pair of rotor, casing and axle institute, and described a pair of rotor is packed in respectively on the axle, and is configured in respectively in separately the casing, and the meshing engagement structure of a pair of rotor is to be the mesh form of its conjugate curve with peak-shaped curve; Its shape is that paddy shape line is three leaf lineal shapes; This meshing engagement structure to rotor also is with the mesh form of peak-shaped curve for its conjugate curve, is four leaf lineal shapes but shape separately is a paddy shape line; This meshing engagement structure to rotor also is with the mesh form of peak-shaped curve for its conjugate curve, is circular arc but shape separately is a paddy shape line; This meshing engagement structure to rotor also is with the mesh form of peak-shaped curve for its conjugate curve, is lineal shape but shape separately is a paddy shape line.
Advantage of the present utility model and effect are:
1. a pair of rotor that is assemblied in the casing can be designed different rotor shapes according to this rotor service condition, thereby reaches best dynamic effect.
2. according to the variation of rotor structure, can form tandem product, after two rotor centre distances were determined, the whole shape of rotor only depended on the requirement of the structure or the intensity of product.
3. several construction rotors that the utility model proposed have the advantages that simple in structure, easy processing, precision are easy to guarantee.
4. a pair of rotor just can reach the big discharge capacity effect that multi-stage rotor could obtain after being assemblied in the casing.
Description of drawings is as follows:
Fig. 1 is a pair of rotor assembling schematic representation of the utility model " three leaf lineal shapes ";
Fig. 2 is a pair of rotor assembling schematic representation of the utility model " four leaf lineal shapes ";
Fig. 3 is a pair of rotor assembling schematic representation of the utility model " circular arc ";
Fig. 4 is a pair of rotor assembling schematic representation of the utility model " lineal shape ".
Below in conjunction with four kinds of embodiments shown in the drawings, the utility model is done further detailed description:
Fig. 1-4 is FLUID TRANSPORTATION pump rotors 1 of four kinds of different structure forms.They all are to be assemblied in one to do relative rotation on the axle 4 separately, because the difference of its paddy deltoid makes the forms of motion of rotor 1 separately different, but its design principle is identical, is that the rotor of lineal shape (Fig. 4) is an example with the paddy deltoid below, and the feasibility of its design and motion is described.
With the straight line line segment during as the paddy molded lines:
When the radius of Fig. 5 two-story valley type curve infinitely increased, this curve became the straight line perpendicular to the x axle, becomes Fig. 2, and paddy type straight line is the hH section in x axle upper portion, and this moment, HO '=2/2R made being m, then m=2/2R.
When rotor B still is that the pitch circle of C rotates the pitch circle of sub-A when making pure rolling with the diameter, the envelope of the paddy type straight line of rotor B is exactly the peak molded lines of rotor A.When tie-rod rotated the θ angle, rotor B centre of pitch circle rotated to O
θThe position, paddy type straight line hH rotates to h
θH
θThe position, H
θCoordinate is (x
θ, y
θ), get by Fig. 2
x
θ＝Lcosθ－mcos2θ
y
θ＝Lsinθ－msin2θ
Straight line h
θH
θEquation be:
Y-y
θ=-(x-x
θ) cty2 θ, when the θ value changes, this The Representation Equation one family of straight lines.
Obtain the conjugate curve (envelope) of this family of straight lines, be the peak type curve of rotor A.The parametric equation of these conjugate curve (envelope) is:
x＝x
θ－1／2x
θsin2θcos2θ－1／2y
θsin
22θ；
y＝y
θ＋1／2y
θsin2θcos2θ＋1／2x
θcos
22θ。
X wherein
θ=-Lsin θ+2msin2 θ
y
θ＝Lcosθ－2mcos2θ
When the θ span is (0, π/4), get the part of peak type envelope above the x axle, this envelope is a symmetry with the x axle.
Therefrom the design and the manufacturing of visible lineal shape rotor are very easy, and its structural relation is also very simple.Straight line molded lines is owing to its intensity, rigidity, capacity utilization etc. all have incomparable advantage with respect to all revolution minor displacement pumps.The straight line type rotor is applied to oil hydraulic pump, will obtain big discharge capacity and high pressure easily, and its mechanism efficiency is also higher.
Can release the design method of other three kinds of rotors that the utility model proposes in view of the above.According to its different formation characteristics, the conveying that its three leaves lineal shape rotor is used for press liquid is comparatively suitable; It is comparatively suitable that four leaf lineal shape rotors are used for the conveying of highly pressurised liquid; And the circular arc rotor is used for gas pump drainage gas such as vacuum pump, blower with being the most suitable.
At work, a pair of rotor 1 places in the casing 3, makes relative pure rolling when axle 4 drives two rotors by pitch circle line 2, and fluid at this moment then is transferred by the direction of arrow shown in the figure.
Claims (4)
1, FLUID TRANSPORTATION pump rotor, form with 4 on axle by a pair of rotor 1, casing 3, it is characterized in that described a pair of rotor 1 is packed in respectively on the axle 4, and be configured in respectively in separately the casing 3 that the meshing engagement structure of a pair of rotor is with the mesh form of peak-shaped curve for its conjugate curve; Its shape is that paddy shape line is three leaf lineal shapes.
2, FLUID TRANSPORTATION pump rotor as claimed in claim 1 is characterized in that this meshing engagement structure to rotor 1 also is with the mesh form of peak-shaped curve for its conjugate curve, is four leaf lineal shapes but shape separately is a paddy shape line.
3, FLUID TRANSPORTATION pump rotor as claimed in claim 1 is characterized in that this meshing engagement structure to rotor 1 also is with the mesh form of peak-shaped curve for its conjugate curve, is circular arc but shape separately is a paddy shape line.
4, FLUID TRANSPORTATION pump rotor as claimed in claim 1 is characterized in that this meshing engagement structure to rotor 1 also is with the mesh form of peak-shaped curve for its conjugate curve, is lineal shape but shape separately is a paddy shape line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94228516 CN2194424Y (en) | 1994-05-09 | 1994-05-09 | Rotator for liquid conveying pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94228516 CN2194424Y (en) | 1994-05-09 | 1994-05-09 | Rotator for liquid conveying pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2194424Y true CN2194424Y (en) | 1995-04-12 |
Family
ID=33841046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94228516 Expired - Fee Related CN2194424Y (en) | 1994-05-09 | 1994-05-09 | Rotator for liquid conveying pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2194424Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927778A (en) * | 2019-12-31 | 2020-11-13 | 中科九微科技有限公司 | Roots rotor and profile design method thereof |
| CN113530818A (en) * | 2021-07-12 | 2021-10-22 | 西安交通大学 | Single-head twisted lobe roots pump rotor and lobe pump |
-
1994
- 1994-05-09 CN CN 94228516 patent/CN2194424Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927778A (en) * | 2019-12-31 | 2020-11-13 | 中科九微科技有限公司 | Roots rotor and profile design method thereof |
| CN113530818A (en) * | 2021-07-12 | 2021-10-22 | 西安交通大学 | Single-head twisted lobe roots pump rotor and lobe pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |