CN113250957B - Single-rotor vacuum pump - Google Patents
Single-rotor vacuum pump Download PDFInfo
- Publication number
- CN113250957B CN113250957B CN202110420606.0A CN202110420606A CN113250957B CN 113250957 B CN113250957 B CN 113250957B CN 202110420606 A CN202110420606 A CN 202110420606A CN 113250957 B CN113250957 B CN 113250957B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/20—Rotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/30—Casings or housings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention provides a single-rotor vacuum pump, which comprises a rotor, a rotor and a pump cavity, wherein a pump cavity shape line is formed by connecting 12 sections of arcs with incompletely same arc radiuses end to end, and sequentially comprises a section a, a section b, a section c, a section d, a section e, a section f, a section g, a section f1, a section e1, a section d1, a section c1 and a section b1 according to the connection sequence; wherein the sections b and b1 are symmetrical and equal in length, the sections c and c1 are symmetrical and equal in length, the sections d and d1 are symmetrical and equal in length, the sections e and e1 are symmetrical and equal in length, and the sections f and f1 are symmetrical and equal in length. The pump cavity line can ensure that the end parts of the two ends of the rotary vane can be well attached to the inner wall of the pump cavity, thereby ensuring the volumetric efficiency of the vacuum pump; compared with a Pascal spiral cavity, the rotary vane has the advantages that the extension length is reduced when the rotary vane rotates, the stress state of the rotary vane is improved, and the maximum working speed of the vacuum pump can be increased to more than 3500 rpm.
Description
Technical Field
The invention relates to a single-rotor vacuum pump.
Background
The vacuum assist system of the vehicle generally provides a vacuum source by a vacuum pump, wherein a single-vane vacuum pump is common.
The pump cavity line of the single-vane vacuum pump is usually circular, elliptical and Pascal vortex-shaped, the pump cavity is matched with an eccentrically-mounted rotor and a vane penetrating through the rotor, and the vane is driven by the rotor to rotate, so that the change of the inner volume of the pump cavity is realized, and the air pumping and exhausting of the vacuum pump can be realized.
The traditional circular and oval pump cavities can not enable the end parts at two ends of the rotary vane to be well attached to the inner wall of the pump cavity when rotating, and the rotary vane leaks too much when compressed gas is exhausted, so that the volumetric efficiency of the vacuum pump is low finally; the Pascal vortex line cavity improves the joint degree of the two end parts of the rotary vane and the inner wall of the pump cavity, so that the volumetric efficiency of the vacuum pump is obviously improved, but the axial extension of the rotary vane is over long, so that the rotating speed of the vacuum pump is limited, and the maximum rotating speed application range of a common Pascal vortex line cavity type single-rotary-vane vacuum pump is 3000 to 3250rpm.
Disclosure of Invention
The invention aims to provide a vacuum pump, which can improve the maximum working speed of the vacuum pump while ensuring the volumetric efficiency of the vacuum pump.
In order to solve the technical problem, the technical scheme of the invention is as follows: a single-rotor vacuum pump comprises a rotor, a pump cavity, wherein the shape line of the pump cavity is formed by connecting 12 sections of arc lines with incompletely same arc radiuses end to end, and sequentially comprises a section a, a section b, a section c, a section d, a section e, a section f, a section g, a section f1, a section e1, a section d1, a section c1 and a section b1 according to the connection sequence; wherein the sections b and b1 are symmetrical and equal in length, the sections c and c1 are symmetrical and equal in length, the sections d and d1 are symmetrical and equal in length, the sections e and e1 are symmetrical and equal in length, and the sections f and f1 are symmetrical and equal in length.
The shape lines of the pump cavities are distributed in an axial symmetry mode, the axial symmetry line passes through the circle center of the cross section of the rotor, and two ends of the axial symmetry line are respectively crossed with the middle point of the section a and the middle point of the section g.
And determining the farthest end and the nearest end of the pump cavity by taking the circle center of the cross section of the rotor as a base point, wherein the farthest end is positioned at the midpoint of the section a, the nearest end is positioned at the midpoint of the section g, and the distance ratio of the farthest end to the nearest end is 2.47.
The invention has the beneficial effects that: the pump cavity line is formed by fitting an ellipse and a Pascal vortex line according to the motion tracks of the end parts of the two ends of the rotary vane, so that the end parts of the two ends of the rotary vane can be well attached to the inner wall of the pump cavity, and the volumetric efficiency of the vacuum pump is ensured; compared with a Pascal vortex linear cavity, the extension length of the rotary plate is reduced when the rotary plate rotates, the stress state of the rotary plate is improved, and the maximum working speed of the vacuum pump can be increased to more than 3500 rpm.
Drawings
FIG. 1 is a schematic view of a vacuum pump according to an embodiment of the present invention;
FIG. 2 is a schematic sectional view of a vacuum pump chamber in an embodiment of the present invention;
the reference signs are:
1-rotor 2-rotor 3-pump cavity.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
As shown in fig. 1 and 2, a single-rotor vacuum pump comprises a rotor 1, a rotor 2 and a pump cavity 3, wherein the shape line of the pump cavity 3 is formed by connecting 12 arc lines with incompletely same arc radiuses end to end, and sequentially comprises a section a, a section b, a section c, a section d, a section e, a section f, a section g, a section f1, a section e1, a section d1, a section c1 and a section b1 according to the connection sequence; wherein the sections b and b1 are symmetrical and equal in length, the sections c and c1 are symmetrical and equal in length, the sections d and d1 are symmetrical and equal in length, the sections e and e1 are symmetrical and equal in length, and the sections f and f1 are symmetrical and equal in length.
As shown in fig. 2, the pump chambers are arranged in an axisymmetrical manner, the axisymmetrical line passes through the center of the cross section of the rotor, and two ends of the axisymmetrical line respectively intersect the midpoint of the section a and the midpoint of the section g.
As shown in fig. 2, the farthest end and the nearest end of the pump chamber are determined by taking the center of the cross-sectional circle of the rotor as a base point, the farthest end is located at the midpoint of the section a, the nearest end is located at the midpoint of the section g, and the distance ratio between the farthest end and the nearest end is 2.47.
The pump cavity line in the embodiment is formed by fitting oval and Pascal vortex lines according to the motion tracks of the end parts of the two ends of the rotary vane, so that the end parts of the two ends of the rotary vane can be well attached to the inner wall of the pump cavity, and the volumetric efficiency of the vacuum pump is ensured; compared with a Pascal vortex linear cavity, the extension length of the rotary plate is reduced when the rotary plate rotates, the stress state of the rotary plate is improved, and the maximum working speed of the vacuum pump can be increased to more than 3500 rpm.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit and scope of the present invention.
Some of the drawings and descriptions of the present invention have been simplified to facilitate the understanding of the improvements over the prior art by those skilled in the art, and some other elements have been omitted from this document for the sake of clarity, and it should be appreciated by those skilled in the art that such omitted elements may also constitute the subject matter of the present invention.
Claims (3)
1. The utility model provides a single rotor vacuum pump, includes rotor, pump chamber, its characterized in that: the shape line of the pump cavity is formed by connecting 12 sections of arcs with incompletely same arc radiuses end to end, and sequentially comprises a section a, a section b, a section c, a section d, a section e, a section f, a section g, a section f1, a section e1, a section d1, a section c1 and a section b1 according to the connection sequence; wherein the sections b and b1 are symmetrical and equal in length, the sections c and c1 are symmetrical and equal in length, the sections d and d1 are symmetrical and equal in length, the sections e and e1 are symmetrical and equal in length, and the sections f and f1 are symmetrical and equal in length.
2. A single-vane vacuum pump as set forth in claim 1, wherein: the shape lines of the pump cavities are distributed in an axisymmetric mode, the axisymmetric line of the pump cavities passes through the circle center of the cross section of the rotor, and two ends of the axisymmetric line of the pump cavities are respectively intersected with the middle point of the section a and the middle point of the section g.
3. A single-vane vacuum pump as set forth in claim 1, wherein: and determining the farthest end and the nearest end of the pump cavity by taking the circle center of the cross section of the rotor as a base point, wherein the farthest end is positioned at the midpoint of the section a, the nearest end is positioned at the midpoint of the section g, and the distance ratio of the farthest end to the nearest end is 2.47.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110420606.0A CN113250957B (en) | 2021-04-19 | 2021-04-19 | Single-rotor vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110420606.0A CN113250957B (en) | 2021-04-19 | 2021-04-19 | Single-rotor vacuum pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113250957A CN113250957A (en) | 2021-08-13 |
| CN113250957B true CN113250957B (en) | 2022-11-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110420606.0A Active CN113250957B (en) | 2021-04-19 | 2021-04-19 | Single-rotor vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113250957B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB739334A (en) * | 1953-01-07 | 1955-10-26 | Vickers Electrical Co Ltd | Improvements in rotary pumps or compressors |
| US3917438A (en) * | 1972-08-24 | 1975-11-04 | Stal Refrigeration Ab | Rotary compressor of the sliding vane type |
| JPS5810190A (en) * | 1981-07-13 | 1983-01-20 | Diesel Kiki Co Ltd | Vane type compressor |
| JPS6258080A (en) * | 1985-05-30 | 1987-03-13 | Nippon Denso Co Ltd | Vane type compressor |
| CN203835723U (en) * | 2014-04-09 | 2014-09-17 | 浙江飞越机电有限公司 | Radial length fixed integral rotary piece type vacuum pump cavity structure |
| CN103982430B (en) * | 2014-04-09 | 2016-02-17 | 浙江飞越机电有限公司 | The design method of high pumping rate rotary-vane vaccum pump pump chamber structure and pump chamber profile |
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2021
- 2021-04-19 CN CN202110420606.0A patent/CN113250957B/en active Active
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| Publication number | Publication date |
|---|---|
| CN113250957A (en) | 2021-08-13 |
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