CN103982430A - High-pumping speed rotary-vane vacuum pump chamber structure and design method for pump chamber profile - Google Patents
High-pumping speed rotary-vane vacuum pump chamber structure and design method for pump chamber profile Download PDFInfo
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- CN103982430A CN103982430A CN201410139393.4A CN201410139393A CN103982430A CN 103982430 A CN103982430 A CN 103982430A CN 201410139393 A CN201410139393 A CN 201410139393A CN 103982430 A CN103982430 A CN 103982430A
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Abstract
The invention provides a high-pumping speed rotary-vane vacuum pump chamber structure and a design method for a pump chamber profile. The invention discloses a rotary-vane vacuum pump and specifically provides the high-pumping speed rotary-vane vacuum pump chamber structure capable of greatly increasing the geometric pumping speed of the vacuum pump without increase of the rotating speed of the vacuum pump and having the advantages of low energy consumption and high work efficiency, and the design method for the pump chamber profile, thereby overcoming the technical problem that air pumping efficiency of a conventional rotary-vane vacuum pump can only be enhanced through increase of the rotating speed of the vacuum pump in the prior art. The structure comprises a pump body and a pump rotor arranged in the pump chamber of the pump body, connected with the pump chamber in the manner of eccentric rotation and tangent to the inner wall of the pump chamber; the pump rotor is radially and slidably connected with a pair of rotary vanes; the rotary vanes outwardly extend and slidably abut against corresponding internal faces of the pump chamber in a sealing way; two sides of the pump body close to the tangency point of the pump rotor and the pump chamber are respectively provided with an air inlet and an air outlet; the pump chamber is a cylindrical cavity formed by enclosure of upper and lower arc sheets and left and right arc sheets connected with and arranged between the upper and lower arc sheets, and joints of the four arc sheets smoothly transit; when the rotary vanes slide over the joints, the rotary vanes always slidably abut against the internal faces of the pump chamber in the sealing way.
Description
Technical field
The present invention relates to a kind of rotary-vane vaccum pump, relate in particular to and a kind ofly can under speed conditions, increase substantially how much pumping speed of vacuum pump waiting, working efficiency is high, the high pumping rate rotary-vane vaccum pump pump chamber structure that energy consumption is low and the design method of pump chamber profile.
Background technique
Vacuum pump is to utilize the methods such as machinery, physics, chemistry or physical chemistry in a certain enclosed space, to produce, improve and maintain the device of vacuum, it is widely used in the fields such as medication chemistry, electronic technology, vacuum drying, refrigeration, generally be divided into reciprocating vacuum pump, rotary-vane vaccum pump and molecular pump etc., rotary-vane vaccum pump is wherein the widest as backing pump application area, accounts for 60%～70% in vacuum equipment configuration.The speed of exhaust of rotary-vane vaccum pump is mainly determined by key elements such as the pump chamber of vacuum pump, rotor, throw of eccentric, rotating speeds, when the key dimensions such as the pump housing of vacuum pump, rotor, throw of eccentric are determined, the working efficiency of bleeding in order to improve rotary-vane vaccum pump, conventional method is to improve the rotating speed of vacuum pump, the motor speed of vacuum pump is brought up to 1400 revs/min from 500 revs/min, even rotating speed is brought up to 3000 revs/min.Although the raising of rotating speed can improve the working efficiency that vacuum pump is bled, there will be the temperature rise of vacuum pump to increase simultaneously, the wearing and tearing aggravation of blade, working stability declines, the reduction of pumping fluid life-span waits series of problems, directly affects the normal performance of vacuum pump performance.
Summary of the invention
The present invention has mainly been to provide a kind of geometry pumping speed that can increase substantially vacuum pump in the situation that not improving vacuum pump rotating speed, energy consumption is low, the high pumping rate rotary-vane vaccum pump pump chamber structure that working efficiency is high and the design method of pump chamber profile, solve the rotary-vane vaccum pump existing in prior art and can only improve by increasing the rotating speed of motor the pumping efficiency of vacuum pump, thereby cause the temperature rise of vacuum pump to increase, the wearing and tearing aggravation of blade, working stability declines, the technical problem of pumping fluid life-span reduction etc.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: a kind of high pumping rate rotary-vane vaccum pump pump chamber structure, comprise the pump housing and eccentric be rotatably connected in pump housing pump chamber and the pump rotor tangent with pump chamber inwall, on pump rotor, radially slide and connecting a pair of blade, blade stretches out and the envelope of sliding is against on corresponding pump chamber internal face, and be provided with suction port and relief opening on the both sides pump housing near pump rotor and pump chamber points of tangency, described pump chamber is by upper arc-like sheet, arc lower sheet and be connected to arc-like sheet and arc lower sheet between left arc-like sheet and the column cavity that encloses of right arc-like sheet, upper arc-like sheet, arc lower sheet, the joint smooth transition of left arc-like sheet and right arc-like sheet, and when blade slides past joint and pump chamber internal face remain that envelope supports state.By upper, under, left, the column cavity that right four arc-like sheets enclose is as the pump chamber of vacuum pump, with respect to traditional positive pulsator cavity configuration, its leaving area increases, thus can be in the situation that vacuum pump rotating speed be constant, by increasing leaving area, realize the object that improves how much pumping speed of vacuum pump, the working efficiency of vacuum pump is high, energy consumption is low, and avoided the vacuum pump energy consumption that produces by improving vacuum pump rotating speed high, temperature rise is large, the wearing and tearing aggravation of blade, pump life of oil reduces, the technical problem of degradation under the working stability of vacuum pump, guaranteeing that vacuum pump is normal, in the situation of stable operation, improved the speed of exhaust.
As preferably, the radial center face of described upper arc-like sheet and arc lower sheet is coplanar, and pump rotor is inscribed within the middle part of arc-like sheet.Guarantee that vacuum pump keeps air-flow steady in suction and discharge process, is beneficial to the smooth running of vacuum pump.
As more preferably, the size of described left arc-like sheet and right arc-like sheet and shape is identical and relatively go up arc-like sheet or arc lower sheet radial center face is symmetric.Make the pump chamber of vacuum pump be symmetrical state, guarantee that vacuum pump pump chamber pressure in whole service process changes balanced, air-flow is steady, improves the stability of vacuum pump operation.
Between upper and lower arc-like sheet, also can connect by the curved surface of other shape, as preferably, the cross section of described upper arc-like sheet and arc lower sheet is elliptic curve, and the cross section of left arc-like sheet and right arc-like sheet is equal diameter circular arc line.When elliptic curve is connected with the upper and lower arc-like sheet of circular shape, joint seamlessly transits, guarantee that blade can not beat or stuck phenomenon at tie point, and after crossing tie point, can also guarantee that blade is along the smooth operation of oval-shaped pump chamber, make blade and pump chamber internal face remain that envelope is to state.
A design method for high pumping rate rotary-vane vaccum pump pump chamber profile, comprises following sequential steps:
1) setting the just round heart of benchmark that diameter is D is O
2, the round heart of pump rotor that diameter is d is O
1, it is just round that pump rotor circle is inscribed within benchmark, and point of contact is J, and throw of eccentric is e;
2) benchmark is just round with respect to O
1and O
2line respectively left, to eccentric distance e of right translation form move to left benchmark just circle and the benchmark that moves to right just round, and to set the just round summit of benchmark that moves to left be A, A O
1elongation line is E with the just round intersection point of the benchmark that moves to right, and the just round summit of the benchmark that moves to right is B, B O
1elongation line is G with the just round intersection point of the benchmark that moves to left;
3) benchmark moving to left just circle is rotated counterclockwise α angle around the rotating shaft of pump rotor circle, the benchmark moving to right just circle around the rotating shaft of the pump rotor circle α angle that turns clockwise;
4) by elliptic curve S1 transition connect Vertex A and summit B; By elliptic curve S2 transition, connect E and G.
The circular benchmark of take is just round is basis, by left and right moving reference, just justifying and rotating rear and connect rear formation pump chamber with elliptic curve, with respect to the pump chamber structure of other shape, meeting under blade and the airtight prerequisite being slidably connected of pump chamber maintenance, make and process simple.
As preferably, pump rotor circle center line and the just round left intersection point of benchmark perpendicular to O1 O2 line in described step 3) are I, right intersection point is C, the just round center line of benchmark perpendicular to O1 O2 line is H with the just round intersection point of the benchmark that moves to left, just justifying intersection point with the benchmark that moves to right is D, and the benchmark that moves to left is just being justified and the just round intersection point on O1 O2 line of the benchmark that moves to right is F; The HD of take draws the first ellipse as the oval center of circle as semi-minor axis, the O2 of take as major axis, the F O2 of take, along intersecting at move to right benchmark just the E point on circle and the just G point on circle of benchmark that moves to left after downward translation the first ellipse of O1 O2 direction, corresponding to oval section of first between EG, be elliptic curve S2; Take IC as major axis, with J O
1for semi-minor axis, with O
1for drawing the second ellipse in the oval center of circle, the second ellipse is a with the just round intersection point of the benchmark that moves to left, and it is b that the second ellipse is just justified intersection point with the benchmark that moves to right, and corresponding to the oval section of second between ab, is elliptic curve S1.
The elliptic curve S1 and the S2 that adopt said method to make, left and right moving reference is just being connected smooth between circle, blade is beated little when pump chamber inwall slides, blade change in resistance in sliding process is even, blade stability of rotation, guarantee good airproof performance between blade and pump chamber inwall, guarantee the usability of vacuum pump.
Therefore, the design method of high pumping rate rotary-vane vaccum pump pump chamber structure of the present invention and pump chamber profile has following advantage: the column cavity being enclosed by four arc-like sheets is as the pump chamber of vacuum pump, and pump chamber joint seamlessly transits and is left, right symmetry, with respect to traditional positive pulsator cavity configuration, effectively aspirated volume increases, therefore in the situation that vacuum pump rotating speed is constant, by increasing effective aspirated volume of pump chamber, realized the object that improves how much pumping speed of vacuum pump, and vacuum pump normal operation is stable, working efficiency is high, energy consumption is low, and the vacuum pump energy consumption producing while having avoided improving vacuum pump rotating speed is high, temperature rise is large, the wearing and tearing aggravation of blade, pump life of oil reduces, degradation problem under the working stability of vacuum pump.
accompanying drawing explanation:
Fig. 1 is the structural representation of high pumping rate rotary-vane vaccum pump pump chamber structure of the present invention;
Fig. 2 is the structural representation of pump chamber profile in the present invention;
Fig. 3 is the drafting schematic diagram of step 3) in the design method of high pumping rate rotary-vane vaccum pump pump chamber profile of the present invention;
Fig. 4 is the drafting schematic diagram of the first ellipse in the design method of high pumping rate rotary-vane vaccum pump pump chamber profile of the present invention;
Fig. 5 is the schematic diagram of elliptic curve S2 in the design method of high pumping rate rotary-vane vaccum pump pump chamber profile of the present invention;
Fig. 6 is the drafting schematic diagram of the second ellipse in the design method of high pumping rate rotary-vane vaccum pump pump chamber profile of the present invention;
Fig. 7 is the schematic diagram of elliptic curve S1 in the design method of high pumping rate rotary-vane vaccum pump pump chamber profile of the present invention;
Fig. 8 is the drafting figure of pump chamber profile in the design method of high pumping rate rotary-vane vaccum pump pump chamber profile of the present invention.
embodiment:
Below by embodiment, and by reference to the accompanying drawings, technological scheme of the present invention is described in further detail.
Embodiment:
As shown in Figure 1, a kind of high pumping rate rotary-vane vaccum pump pump chamber structure of the present invention comprises the pump rotor 2 in the pump housing 1 receiving cavity 11 that is rotatably connected on of the pump housing 1 and bias, on pump rotor 2, have a radially groove, a pair of blade 3 is radially being slidably connected in groove radially, the two ends of blade 3 radially extend to respectively the outer also envelope of pump rotor 2 and are against on corresponding receiving cavity 11 internal faces, blade 3 ends corresponding with the inwall of receiving cavity 11 are arc surfaced, and blade 3 ends of arc surfaced all with between corresponding receiving cavity 11 internal faces keep airtight being slidably connected, as shown in Figure 2, pump chamber 11 is by upper arc-like sheet 6, arc lower sheet 7 and be connected to arc-like sheet 6 and column cavity that the left arc-like sheet 8 of 7 of arc lower sheets and right arc-like sheet 9 enclose, the radial center face of upper arc-like sheet 6 and arc lower sheet 7 is coplanar, pump rotor 2 is inscribed within the middle part of arc-like sheet 6, the size of left arc-like sheet 8 and right arc-like sheet 9 and shape is identical and relatively go up arc-like sheet 6 or arc lower sheet 7 radial center faces are symmetric, upper arc-like sheet 6 wherein and the cross section of arc lower sheet 7 are elliptic curve, the cross section of left arc-like sheet 8 and right arc-like sheet 9 is equal diameter circular arc line, upper arc-like sheet 6, arc lower sheet 7, the joint smooth transition of left arc-like sheet 8 and right arc-like sheet 9, while guaranteeing that blade 3 slides past joint and pump chamber 11 internal faces remain that envelope supports state.On the both sides pump housing 1 near pump rotor 2 and arc-like sheet 6 point of contacts, have a suction port 4 and a relief opening 5.
A design method for high pumping rate rotary-vane vaccum pump pump chamber profile, comprises following sequential steps: as shown in Fig. 3 and Fig. 8,
1) setting just round 12 centers of circle of benchmark that diameter is D is O
2, pump rotor circle 13 centers of circle that diameter is d are O
1, pump rotor circle 13 is inscribed within benchmark and just justifies 12, and point of contact is J, and throw of eccentric is e;
2) benchmark is just justifying 12 with respect to O
1and O
2line respectively left, to eccentric distance e of right translation form move to left benchmark just round 14 and the benchmark that moves to right just round 15, and set move to left benchmark just round 14 summit be A, A O
1elongation line is E with just round 15 intersection points of the benchmark that moves to right, move to right benchmark just round 14 summit be B, B O
1elongation line is G with just round 14 intersection points of the benchmark that moves to left;
3) benchmark moving to left just round 14 is rotated counterclockwise α angle around the rotating shafts of pump rotor circle 13, and the benchmark moving to right is round 15 rotating shafts around the pump rotor circle 13 α angle that turns clockwise just;
As shown in Figure 4,
4) perpendicular to O
1o
2the just round 12 left intersection points of pump rotor circle 13 center lines of line and benchmark are I, and right intersection point is C, perpendicular to O
1o
2the benchmark of line is just being justified 12 center lines and just round 14 intersection points of the benchmark that moves to left are H, and just justifying 15 intersection points with the benchmark that moves to right is D, and the benchmark that moves to left is just being justified 14 and just justified 15 at O with the benchmark that moves to right
1o
2intersection point on line is F; Take HD as major axis, with F O
2for semi-minor axis, with O
2for drawing the first ellipse 16 in the oval center of circle, as shown in Figure 5, along O
1o
2after downward translation the first ellipse 16 of direction, intersect at the E point moving to right on benchmark just round 15 and the just G point on round 14 of benchmark that moves to left, corresponding to 16 sections of the ellipses of first between EG, be elliptic curve S2 19; As shown in Figure 6, take IC as major axis, with J O
1for semi-minor axis, with O
1for the oval center of circle, drawing the second ellipse 17, the second oval 17 is a with just round 14 intersection points of the benchmark that moves to left, and the second ellipse 17 is b with just round 15 intersection points of the benchmark that moves to right, and as shown in Figure 7, corresponding to oval 17 sections of second between ab, is elliptic curve S1 18.
Specific embodiment described herein is only to design of the present invention explanation for example.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (6)
1. a high pumping rate rotary-vane vaccum pump pump chamber structure, comprise the pump housing (1) and eccentric be rotatably connected in the pump housing (1) pump chamber (11) and the pump rotor (2) tangent with pump chamber (11) inwall, on pump rotor (2), radially slide and connecting a pair of blade (3), blade (3) stretches out and the envelope of sliding is against on corresponding pump chamber (11) internal face, and be provided with suction port (4) and relief opening (5) on the both sides pump housing (1) near pump rotor (2) and pump chamber (11) points of tangency, it is characterized in that: described pump chamber (11) is by upper arc-like sheet (6), arc lower sheet (7) and be connected to arc-like sheet (6) and arc lower sheet (7) between left arc-like sheet (8) and the column cavity that encloses of right arc-like sheet (9), upper arc-like sheet (6), arc lower sheet (7), the joint of left arc-like sheet (8) and right arc-like sheet (9) is smooth excessively, and when blade (3) slides past joint and pump chamber (11) internal face remain that envelope supports state.
2. high pumping rate rotary-vane vaccum pump pump chamber structure according to claim 1, is characterized in that: the radial center face of described upper arc-like sheet (6) and arc lower sheet (7) is coplanar, and pump rotor (2) is inscribed within the middle part of arc-like sheet (6).
3. high pumping rate rotary-vane vaccum pump pump chamber structure according to claim 2, is characterized in that: the size of described left arc-like sheet (8) and right arc-like sheet (9) and shape is identical and relatively go up arc-like sheet (6) or arc lower sheet (7) radial center face is symmetric.
4. according to the high pumping rate rotary-vane vaccum pump pump chamber structure described in claim 1 or 2 or 3, it is characterized in that: the cross section of described upper arc-like sheet (6) and arc lower sheet (7) is elliptic curve, the cross section of left arc-like sheet (8) and right arc-like sheet (9) is equal diameter circular arc line.
5. a design method for high pumping rate rotary-vane vaccum pump pump chamber profile, is characterized in that: comprise following sequential steps:
1) it is O that the benchmark that setting diameter is D is just justified (12) center of circle
2, pump rotor circle (13) center of circle that diameter is d is O
1, pump rotor circle (13) is inscribed within benchmark and is just justifying (12), and point of contact is J, and throw of eccentric is e;
2) benchmark is just being justified (12) with respect to O
1and O
2respectively left, to eccentric distance e of right translation, form and move to left that benchmark just justify (14) and the benchmark that moves to right is just being justified (15), and the setting summit that benchmark just justifying (14) that moves to left is A to line, A O
1it is E that elongation line is just justified (15) intersection point with the benchmark that moves to right, and the summit that the benchmark that moves to right is just being justified (14) is B, B O
1it is G that elongation line is just justified (14) intersection point with the benchmark that moves to left;
3) benchmark moving to left is just being justified (14) and is being rotated counterclockwise α angle around the rotating shaft of pump rotor circle (13), and the benchmark moving to right just justify the rotating shaft of (15) justifying (13) around the pump rotor α angle that turns clockwise;
4) by elliptic curve S1(18) transition connect Vertex A and summit B; By elliptic curve S2(19) transition connection E and G.
6. the design method of high pumping rate rotary-vane vaccum pump pump chamber profile according to claim 5, is characterized in that: in described step 3) perpendicular to O
1o
2it is I that pump rotor circle (13) center line of line and benchmark are just justified (12) left intersection point, and right intersection point is C, perpendicular to O
1o
2the benchmark of line is just being justified (12) center line, and just to justify (14) intersection point be H with the benchmark that moves to left, and just justifying (15) intersection point with the benchmark that moves to right is D, and the benchmark that moves to left is just being justified (14) and the benchmark that moves to right is just being justified (15) at O
1o
2intersection point on line is F; Take HD as major axis, with F O
2for semi-minor axis, with O
2for drawing the first ellipse (16) in the oval center of circle, along O
1o
2after downward translation the first ellipse of direction (16), intersect at that the benchmark that moves to right is just being justified the E point on (15) and the benchmark that moves to left is just being justified the G point on (14), corresponding to the first ellipse (16) section between EG, be elliptic curve S2(19); Take IC as major axis, with J O
1for semi-minor axis, with O
1for drawing the second ellipse (17) in the oval center of circle, it is a that the second ellipse (17) is just justified (14) intersection point with the benchmark that moves to left, it is b that the second ellipse (17) is just justified (15) intersection point with the benchmark that moves to right, and corresponding to the second ellipse (17) section between ab, is elliptic curve S1(18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410139393.4A CN103982430B (en) | 2014-04-09 | 2014-04-09 | The design method of high pumping rate rotary-vane vaccum pump pump chamber structure and pump chamber profile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410139393.4A CN103982430B (en) | 2014-04-09 | 2014-04-09 | The design method of high pumping rate rotary-vane vaccum pump pump chamber structure and pump chamber profile |
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| Publication Number | Publication Date |
|---|---|
| CN103982430A true CN103982430A (en) | 2014-08-13 |
| CN103982430B CN103982430B (en) | 2016-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410139393.4A Active CN103982430B (en) | 2014-04-09 | 2014-04-09 | The design method of high pumping rate rotary-vane vaccum pump pump chamber structure and pump chamber profile |
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| CN (1) | CN103982430B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110025838A (en) * | 2019-05-31 | 2019-07-19 | 河南科技大学第一附属医院 | A kind of quick sputum aspirator of emergency |
| CN113250957A (en) * | 2021-04-19 | 2021-08-13 | 湖南腾智机电有限责任公司 | Single-rotor vacuum pump |
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| 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 |
| GB2075121A (en) * | 1980-04-25 | 1981-11-11 | Flamme J M | Rotary positive-displacement fluid-machines |
| JPS6258080A (en) * | 1985-05-30 | 1987-03-13 | Nippon Denso Co Ltd | Vane type compressor |
| CN1548703A (en) * | 2003-05-07 | 2004-11-24 | 宁 金 | Multi-arc cylinder body sliding sheet rotor positive displacement machinery |
| CN203835722U (en) * | 2014-04-09 | 2014-09-17 | 浙江飞越机电有限公司 | High-pumping-speed rotary vane type vacuum pump cavity structure |
-
2014
- 2014-04-09 CN CN201410139393.4A patent/CN103982430B/en active Active
Patent Citations (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 |
| GB2075121A (en) * | 1980-04-25 | 1981-11-11 | Flamme J M | Rotary positive-displacement fluid-machines |
| JPS6258080A (en) * | 1985-05-30 | 1987-03-13 | Nippon Denso Co Ltd | Vane type compressor |
| CN1548703A (en) * | 2003-05-07 | 2004-11-24 | 宁 金 | Multi-arc cylinder body sliding sheet rotor positive displacement machinery |
| CN203835722U (en) * | 2014-04-09 | 2014-09-17 | 浙江飞越机电有限公司 | High-pumping-speed rotary vane type vacuum pump cavity structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110025838A (en) * | 2019-05-31 | 2019-07-19 | 河南科技大学第一附属医院 | A kind of quick sputum aspirator of emergency |
| CN113250957A (en) * | 2021-04-19 | 2021-08-13 | 湖南腾智机电有限责任公司 | Single-rotor vacuum pump |
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| Publication number | Publication date |
|---|---|
| CN103982430B (en) | 2016-02-17 |
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