CN101985938A - Three-axis composite dry pump with screw and roots rotor - Google Patents
Three-axis composite dry pump with screw and roots rotor Download PDFInfo
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- CN101985938A CN101985938A CN 201010565676 CN201010565676A CN101985938A CN 101985938 A CN101985938 A CN 101985938A CN 201010565676 CN201010565676 CN 201010565676 CN 201010565676 A CN201010565676 A CN 201010565676A CN 101985938 A CN101985938 A CN 101985938A
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Abstract
The invention relates to a vacuum pump, in particular to a three-axis composite dry pump with a screw and a roots rotor. The three-axis composite dry pump comprises a motor, a spindle and a driven shaft, wherein the spindle is engaged with a gear at a shaft end so as to drive the driven shaft; two driven shafts are parallel and are symmetrically assembled on two sides of the spindle; a screw rotor and the roots rotor are assembled on the spindle and the driven shafts on two sides; and the screw rotor and the roots rotor on each shaft are separated through a clapboard. The three-axis composite dry pump has a higher pumping speed in a wider pressure range, and compared with that of the two-axis composite dry pump, the pumping speed of the pump is approximately doubled. Meanwhile, the three-axis composite dry pump has good dynamic balance characteristics and the reliability and service life are greatly improved.
Description
Technical field
The present invention relates to a kind of vacuum pump, be specifically related to a kind of three compound dried pumps with screw rod and roots rotor.
Background technique
Existing dried pump all adopts two axle construction, and rotor shaft especially driving shaft is subjected to asymmetric periodicity active force, and vibration and noise are big, and pumping efficiency is low, and not only being difficult in the pressure range of broad has bigger pumping speed, and has increased the consumption to the energy.
Summary of the invention
At the existing in prior technology problem, the invention provides a kind of three compound dried pumps with screw rod and roots rotor, solved the big and low problem of pumping efficiency of vibrating noise.
Three compound dried pumps of screw rod of the present invention and roots rotor, comprise motor, main shaft and driven shaft, be equipped with driving gear on the main shaft, the driven gear that is meshed with driving gear is assemblied on the driven shaft, main points are that driven shaft is two, parallel and the symmetrical main shaft both sides that are assemblied in all are equipped with screw rotor and roots rotor on main shaft and the both sides driven shaft, and screw rotor and roots rotor on every axle separate by dividing plate.
Described dividing plate is provided with three axis holes, opens a pore below the axis hole of left driven shaft, opens a pore above the axis hole of right driven shaft, and two pores are symmetrically distributed up and down along the straight line at axis hole place.
Described roots rotor is orthogonal to be installed on main shaft and the driven shaft.
The described roots rotor number of sheets is two leaves, four leaves, six leaves or eight leaves.
The described main shaft and the line of centres of two driven shafts on same cross section are straight line or triangle.
Described roots rotor progression is 1 grade～6 grades.
When described roots rotor progression is 2 grades～6 grades, separate with dividing plate between the adjacent two-stage.
The beneficial effect of the present invention's outstanding feature and generation compared with prior art is: because in the present techniques scheme, outstanding feature is that Roots is mutually compound with screw rod, make three compound dried pumps of screw rod and roots rotor that bigger pumping speed can be arranged in the pressure range of broad, and the power curve of compound dried pump still can be similar to a horizontal line along with the variation of pressure.This performance effectively reduces the consumption of energy.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the pumping process schematic representation of Roots's part;
Fig. 3 is a roots rotor cross section molded lines;
The structural representation that Fig. 4 is triangularly arranged for the rotor cross-section line of centres;
Among the figure: 1 motor, 2 driving gears, 3 right driven gears, 4 main shafts, 5 active screw rotors, 6 right driven screw rotors, 7 dividing plates, 8 right driven shafts, 9 right driven roots rotors, 10 air-inlet cavitys, 11 left driven roots rotors, 12 left driven shafts, 13 active roots rotors, 14 left driven screw rotors, 15 exhaust cavitys, 16 left driven gears, 17 suction ports, 18 relief openings, 19 bearing (ball) covers, 20 pump housings, 21 upper bearing brackets, 22 steps, 23 upper bearing (metal)s, 24 gear chamber, 25 lower bearings.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
Three compound dried pumps of example 1. screw rods of the present invention and roots rotor, wherein motor 1 is connected with main shaft 4, driving gear 2, left side driven gear 16 is connected by key with right driven gear 3 and is assemblied in main shaft 4 respectively, on left side driven shaft 12 and the right driven shaft 8, three axles are parallel distribution, under three synchromesh gears drive, three axles are done reverse each other rotatablely moving, at main shaft 4, all be fixed with the roots rotor of a screw rotor and 2 grade of eight leaf on left side driven shaft 12 and the right driven shaft 8, screw rotor is connected by key with roots rotor and is separately fixed on three axles, main shaft 4, left side driven shaft 12 and right driven shaft 8 all are equipped with bearing on the shaft shoulder at two ends, upper bearing (metal) 23 is fixed on the upper bearing bracket 21, upper bearing bracket 21 tops are connected with a cavity gear chamber 24, the shaft shoulder that three axles extend to gear chamber 24 partly is equipped with bearing, gear chamber 24 and upper bearing bracket 21 form by integrally casting, the cavity of upper bearing bracket 21 inside is an exhaust cavity 15, exhaust cavity 15 communicates with relief opening 18, motor 1 is by being bolted on the gear chamber 24, upper bearing bracket 21 is connected with the pump housing 20 by bolt, the orthogonal main shaft 4 that is installed in respectively of three four leaf roots rotors of the pump housing 20 inside, on left side driven shaft 12 and the right driven shaft 8, roots rotor and screw rotor separate by dividing plate 7, dividing plate 7 is provided with three axis holes, open a pore below the axis hole of left driven shaft 12, open a pore above the axis hole of right driven shaft 8, two pores are symmetrically distributed up and down along the straight line at axis hole place.Step 22 is by being bolted on the pump housing 20, the cavity of step 22 inside is an air-inlet cavity 10, have suction port 17 on the step 22 at air-inlet cavity 10 tops, suction port 17 is connected with air inlet pipeline, and bearing (ball) cover 19 is by being bolted on the step 22.
Screw rotor drives engagement synchronously by three gears, and inter-lobe clearance is very little, but does not contact, thereby can produce high vacuum, is not easy wearing and tearing again.Compare with other dried pumps such as vortex pump, pawl type pumps, screw pump has clear superiority, has both had higher compression ratio, and is steady relatively again.
Three axles be furnished with two kinds of schemes: one is that three axle horizontals arrange that two is that three axles are triangularly arranged.Because three synchromesh gears engagements of the designing requirement of three axles, in order to prevent the interference of two-way air inlet and exhaust, and simplified structure, adopt three axle horizontals to be arranged as, also can adopt triangular arrangement.
Working procedure of the present invention is: provide power source by motor 1.Motor 1 directly is connected with main shaft 4, thereby drives main shaft 4 rotations.Main shaft 4 connects driving gear 2 by key, drives left driven gear 16 and 3 rotations of right driven gear.Left side driven gear 16 is connected with right driven shaft 8 with left driven shaft 12 respectively with right driven gear 3, drives the rotation of two driven shafts.Initiatively screw rotor 5, left driven screw rotor 14, right driven screw rotor 6, the initiatively synchronous rotation of roots rotor 13, left driven roots rotor 11 and right driven roots rotor 9 have so just been realized.Contactless engagement between rotor forms the space of sealing together with pump housing inwall, thus the air-breathing and exhaust of property performance period.
Separate with dividing plate 7 between the pump internal rotor.The gas of discharging that interacts between rotor and rotor, rotor and the pump housing inwall is finally discharged by relief opening 18 by the pore in dividing plate 7, air-inlet cavity 10 and the exhaust cavity 15.Under rotor rotation effects at different levels, realize the transport process of gas.Three compound dried pumps of screw rod and roots rotor are on the basis of the part advantage that has kept Roots pump and screw pump, and its three layouts and screw rod and the compound more advantages of Roots are arranged: dynamic balance performance is good, and running is steady, effectively vibration damping and noise reduction; Compact structure, identical pumping speed lower volume is less, has reduced cost effectively, and rate of fault reduces, and has reduced maintenance cost.
Example 2. its structures, connection is identical with embodiment 1 with working procedure, and difference is all to be equipped with on main shaft and the both sides driven shaft roots rotor of 2 grade of eight leaf.
Example 3. its working procedure are identical with embodiment 1, and difference is main shaft 4, and left driven shaft 12 and right driven shaft 8 are triangularly arranged.
Claims (7)
1. three compound dried pumps with screw rod and roots rotor, comprise motor, main shaft and driven shaft, be equipped with driving gear on the main shaft, the driven gear that is meshed with driving gear is assemblied on the driven shaft, it is characterized in that driven shaft is two, parallel and the symmetrical main shaft both sides that are assemblied in all are equipped with screw rotor and roots rotor on main shaft and the both sides driven shaft, and screw rotor and roots rotor on every axle separate by dividing plate.
2. a kind of three compound dried pumps as claimed in claim 1 with screw rod and roots rotor, it is characterized in that described dividing plate is provided with three axis holes, below the axis hole of left driven shaft, open a pore, open a pore above the axis hole of right driven shaft, two pores are symmetrically distributed up and down along the straight line at axis hole place.
3. a kind of three compound dried pumps with screw rod and roots rotor as claimed in claim 1 is characterized in that described roots rotor is orthogonal to be installed on main shaft and the driven shaft.
4. a kind of three compound dried pumps with screw rod and roots rotor as claimed in claim 1 is characterized in that the described roots rotor number of sheets is two leaves, four leaves, six leaves or eight leaves.
5. a kind of three compound dried pumps with screw rod and roots rotor as claimed in claim 1 is characterized in that the described main shaft and the line of centres of two driven shafts on same cross section are straight line or triangle.
6. a kind of three compound dried pumps with screw rod and roots rotor as claimed in claim 1 is characterized in that described roots rotor progression is 1 grade～6 grades.
7. a kind of three compound dried pumps with screw rod and roots rotor as claimed in claim 6 when it is characterized in that described roots rotor progression is 2 grades～6 grades, separate with dividing plate between the adjacent two-stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010565676 CN101985938A (en) | 2010-11-30 | 2010-11-30 | Three-axis composite dry pump with screw and roots rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010565676 CN101985938A (en) | 2010-11-30 | 2010-11-30 | Three-axis composite dry pump with screw and roots rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101985938A true CN101985938A (en) | 2011-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010565676 Pending CN101985938A (en) | 2010-11-30 | 2010-11-30 | Three-axis composite dry pump with screw and roots rotor |
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| CN (1) | CN101985938A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486034A (en) * | 2013-10-17 | 2014-01-01 | 山东伯仲真空设备股份有限公司 | Multi-level Roots pump |
| CN103732923A (en) * | 2011-08-17 | 2014-04-16 | 厄利孔莱博尔德真空技术有限责任公司 | Roots pump |
| CN103994070A (en) * | 2014-05-22 | 2014-08-20 | 威海智德真空科技有限公司 | Screw vacuum pump and rotor planetary layout structure of compressor |
| CN112780563A (en) * | 2019-11-07 | 2021-05-11 | 中国石油化工股份有限公司 | Two-stage dry vacuum pump |
| CN113137369A (en) * | 2021-05-27 | 2021-07-20 | 威鹏晟(山东)真空技术有限公司 | Roots screw composite vacuum pump |
| CN114412788A (en) * | 2022-03-02 | 2022-04-29 | 南通诺博特机器人制造有限公司 | Energy-saving Roots-screw integrated oil-free vacuum pump |
| CN114526233A (en) * | 2022-03-02 | 2022-05-24 | 安徽理工大学 | Composite dry vacuum pump with roots rotor and screw rotor connected in series and use method |
| CN114607600A (en) * | 2020-12-09 | 2022-06-10 | 东北大学 | Novel multistage roots vacuum pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB504385A (en) * | 1937-09-29 | 1939-04-25 | Fletcher & Winterbottom Ltd | Improvements in or relating to rotary blowers or compressors |
| EP0953771A1 (en) * | 1998-04-27 | 1999-11-03 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Single-stage and multi-stage roots pump |
| JP2000161269A (en) * | 1998-11-27 | 2000-06-13 | Toyota Autom Loom Works Ltd | Roots pump and pump device |
| US20030035731A1 (en) * | 2001-08-14 | 2003-02-20 | Deok-Kyeom Kim | Dry vacuum pump |
| US20060083651A1 (en) * | 2004-10-01 | 2006-04-20 | Lim Moon G | Composite dry vacuum pump having roots rotor and screw rotor |
-
2010
- 2010-11-30 CN CN 201010565676 patent/CN101985938A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB504385A (en) * | 1937-09-29 | 1939-04-25 | Fletcher & Winterbottom Ltd | Improvements in or relating to rotary blowers or compressors |
| EP0953771A1 (en) * | 1998-04-27 | 1999-11-03 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Single-stage and multi-stage roots pump |
| JP2000161269A (en) * | 1998-11-27 | 2000-06-13 | Toyota Autom Loom Works Ltd | Roots pump and pump device |
| US20030035731A1 (en) * | 2001-08-14 | 2003-02-20 | Deok-Kyeom Kim | Dry vacuum pump |
| US20060083651A1 (en) * | 2004-10-01 | 2006-04-20 | Lim Moon G | Composite dry vacuum pump having roots rotor and screw rotor |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103732923A (en) * | 2011-08-17 | 2014-04-16 | 厄利孔莱博尔德真空技术有限责任公司 | Roots pump |
| CN103732923B (en) * | 2011-08-17 | 2016-09-21 | 厄利孔莱博尔德真空技术有限责任公司 | Rocker-type piston pump |
| US9476423B2 (en) | 2011-08-17 | 2016-10-25 | Oerlikon Leybold Vaccum Gmbh | Roots pump connection channels separating adjacent pump stages |
| CN103486034A (en) * | 2013-10-17 | 2014-01-01 | 山东伯仲真空设备股份有限公司 | Multi-level Roots pump |
| CN103486034B (en) * | 2013-10-17 | 2016-04-06 | 山东伯仲真空设备股份有限公司 | Multi-stage roots pump |
| CN103994070A (en) * | 2014-05-22 | 2014-08-20 | 威海智德真空科技有限公司 | Screw vacuum pump and rotor planetary layout structure of compressor |
| CN112780563A (en) * | 2019-11-07 | 2021-05-11 | 中国石油化工股份有限公司 | Two-stage dry vacuum pump |
| CN114607600A (en) * | 2020-12-09 | 2022-06-10 | 东北大学 | Novel multistage roots vacuum pump |
| CN114607600B (en) * | 2020-12-09 | 2023-03-21 | 东北大学 | Novel multistage roots vacuum pump |
| CN113137369A (en) * | 2021-05-27 | 2021-07-20 | 威鹏晟(山东)真空技术有限公司 | Roots screw composite vacuum pump |
| CN113137369B (en) * | 2021-05-27 | 2024-05-31 | 威鹏晟(山东)真空技术有限公司 | Roots screw composite vacuum pump |
| CN114412788A (en) * | 2022-03-02 | 2022-04-29 | 南通诺博特机器人制造有限公司 | Energy-saving Roots-screw integrated oil-free vacuum pump |
| CN114526233A (en) * | 2022-03-02 | 2022-05-24 | 安徽理工大学 | Composite dry vacuum pump with roots rotor and screw rotor connected in series and use method |
| CN114412788B (en) * | 2022-03-02 | 2024-03-22 | 南通诺博特机器人制造有限公司 | Energy-saving Roots-screw integrated oil-free vacuum pump |
| CN114526233B (en) * | 2022-03-02 | 2024-05-10 | 安徽理工大学 | Composite dry vacuum pump with Roots rotor and screw rotor connected in series and use method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 110819 Heping Road, Heping District, Liaoning, Shenyang, Lane No. 11, No. 3 Applicant after: Northeastern University Co-applicant after: Shenyang Scientific Apparatus Co., Ltd. of Chinese Academy of Sciences Address before: 110819 Heping Road, Heping District, Liaoning, Shenyang, Lane No. 11, No. 3 Applicant before: Northeastern University Co-applicant before: Shenyang Scientific Instrument Research & Mfg. Center Co., Ltd., C.A.S |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110316 |