CN104373348A - Novel double-screw vacuum pump - Google Patents
Novel double-screw vacuum pump Download PDFInfo
- Publication number
- CN104373348A CN104373348A CN201410261216.3A CN201410261216A CN104373348A CN 104373348 A CN104373348 A CN 104373348A CN 201410261216 A CN201410261216 A CN 201410261216A CN 104373348 A CN104373348 A CN 104373348A
- Authority
- CN
- China
- Prior art keywords
- screw
- driven
- vacuum pump
- novel double
- pump
- 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.)
- Pending
Links
- 239000002828 fuel tank Substances 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 230000001360 synchronised effect Effects 0.000 abstract 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
Classifications
-
- 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
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
-
- 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
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/082—Details specially related to intermeshing engagement type pumps
-
- 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
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
A disclosed novel double-screw vacuum pump comprises screws, a pump sleeve, synchronous gears, end caps, a bearing and a sealing assembly; the screws comprise a driving screw and a driven screw which are different in diameter and opposite in rotation direction, and are both installed in the pump sleeve; two ends of the pump sleeve are provided flanges; the bearing and the sealing assembly are installed on the end caps at two ends; shaft sleeves of the driving screw and the driven screw are sleeved by the bearing between the two end caps; the end caps at the two ends are connected with the pump sleeve via bolts; the two synchronous gears outside the end caps are respectively fixedly installed on the central shafts of the driving screw and the driven screw by expansion bushings; a fuel tank and a motor flange are installed on a rear end cap; a driving shaft is provided with a universal driving shaft which is driven to rotate by a motor; and a gas enters via an air inlet and is exhausted by an air exhausting port. The screw length is relatively short, a complete sealing ring can be formed by rotating the screw for one loop, and the novel double-screw vacuum pump is a miniature screw pump which is relatively high in limit vacuum degree, free of oil, environment-friendly and energy-saving.
Description
Technical field
The present invention relates to dry vacuum equipment technical field, particularly relate to a kind of Novel double-screw vacuum pump.
Background technique
At present, on market, existing vacuum pump kind is a lot, and oil-free dry vacuum pump is due to pollution-free, energy-conserving and environment-protective, is the developing direction of following vacuum pump.And screw vacuum pump due to without friction, rational in infrastructure, gear, bearing, shaft seal have the oil lubrication in fuel tank, so this pump has the working life of overlength, belong to optimal one in vacuum pump.It is widely used in any field needing to obtain vacuum such as biochemical pharmacy, solar energy, semiconductor, petroleum vapor recovery.
Due to the problem of screw rod of screw pump profile of tooth, general two circles could form a Seal cage completed, so when the number of turns needing to need when reaching same ultimate vacuum is more, the length of screw pump are increased, smaller owing to compressing in the screw pump of small flow, ultimate vacuum is very low.
Summary of the invention
The object of this invention is to provide a kind of Novel double-screw vacuum pump, its spiro rod length is shorter, can form a complete seal ring once enclosing, be a kind of ultimate vacuum higher without oil, environmental protection, energy-conservation small-sized screw pump.
The technical solution adopted for the present invention to solve the technical problems is: a kind of Novel double-screw vacuum pump, comprise screw rod, pump block, synchromesh gear, end cap, bearing, black box, described screw rod comprises the contrary drive screw of the different rotation direction of diameter and driven screw, described drive screw and driven screw are contained in pump block, the two ends of pump block are provided with flange, described bearing and black box are contained on the end cap at two ends, the axle sleeve of drive screw and driven screw is in the bearing of two ends end cap, the end cover bolt at two ends is connected on pump block, two synchromesh gears outside end cap fixed by expansion set be contained in drive screw and driven screw respectively central shaft on, fuel tank and motor flange are contained on rear end cover, live axle is equipped with couple axle to be rotated by driven by motor, gas enters from suction port to be got rid of from relief opening.
As preferably, the diameter of described drive screw is greater than the diameter of driven screw.
As preferably, the root diameter of described drive screw is equal with the tooth tip diameter of driven screw.
As preferably, described drive screw and driven screw are multi-turn uniform pitch or variable pitch.
As preferably, described pump block and cover internal are respectively with the sealing of O type circle.
The invention has the beneficial effects as follows: owing to have employed two screw rods of different-diameter, when two screw rod engagements, just can form a complete sealing profile of tooth, although compare flow with the pump of diameter identical pitch like this to reduce to some extent, if the number of turns is identical, many one times of the potted line formed, the ultimate vacuum formed like this is higher, so be especially applicable to the screw vacuum pump of small flow.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the drive screw profile of tooth formation figure in Fig. 1.
Fig. 3 is the driven screw profile of tooth formation figure in Fig. 1.
1. drive screws, 2. driven screw, 3. pump block, 4. flange, 5. bearing, 6. black box, 7. front cover, 8. rear end cover, 9. bolt, 10. synchromesh gear in figure, 11. O type circles, 12. fuel tanks and motor adpting flange, 13. suction ports, 14. relief openings.
Embodiment
In order to make technical problem solved by the invention, technological scheme and beneficial effect clearly understand, below in conjunction with accompanying drawing and embodiment, the present invention is further illustrated.Should be appreciated that embodiment described herein only for explaining the present invention, being not intended to limit the present invention.
As shown in Figure 1, a kind of Novel double-screw vacuum pump, comprise screw rod, pump block 3, synchromesh gear 10, end cap, bearing 5, black box 6, screw rod is made up of the contrary drive screw 1 of the different rotation direction of diameter and driven screw 2, drive screw 1 and driven screw 2 are contained in pump block 3, the two ends of pump block 3 are provided with flange 4, bearing 5 and black box 6 are contained on front cover 7 and rear end cover 8, pump block 3 and cover internal seal with O type circle 11 respectively, the axle sleeve of drive screw 1 and driven screw 2 is in the bearing 5 of front cover 7 and rear end cover 8, front cover 7 and rear end cover 8 are connected on pump block 3 with bolt 9 respectively, two synchromesh gears 10 outside end cap fixed by expansion set be contained in drive screw 1 and driven screw 2 respectively central shaft on, fuel tank and motor adpting flange 12 are contained on rear end cover 8, live axle is equipped with couple axle to be rotated by driven by motor, gas enters from suction port 13 to be got rid of from relief opening 14.
As Figure 2-3, when rotating to enable drive screw 1 and driven screw 2, profile of tooth seals mutually, and namely AC arc is at O
1on circle and BC arc at O
2circle all will seal, and the root diameter of drive screw 1 is equal with the tooth tip diameter of driven screw 2, O
1for drive screw end face, with tooth root A for basic point, see Fig. 2, when C point is with radius O
2when C is mobile to A point, α
1angle and α
2angular difference reduces gradually, to being zero during A point.O
1on circle, Radius A point is the height in tooth root upwards this shop to the Y-coordinate of each point of C point, and X-coordinate is point and O for this
1, O
2the leg-of-mutton difference that line is formed is multiplied by pitch T divided by 360 degree, and namely X equals Δ α × T/360, moves to C ' point to C point during tooth top.
O
2nose circle face is with root circle B for basic point, and rectangular coordinate system initial point X-direction moves to O
1tooth top C ' point after circle processing, by C point O
1, O
2the triangle that point is formed, is shown in Fig. 2, when C point is with O
1c is radius when thinking that B point is mobile, i.e. O
2c radius reduces gradually, the triangle α that certain point on CB arc is formed
1, α
2the difference at angle is multiplied by pitch T divided by 360 degree, is the X-coordinate that C ' puts, and Y-coordinate is the height that tooth root arrives this point.
Adopt the screw rod composition that two different-diameter rotation directions are contrary, the diameter of drive screw 1 is greater than driven screw 2, has a pair synchromesh gear 10 to drive two screw rods to do frictionless relative movement.The root diameter of drive screw 1 is equal with the tooth tip diameter of driven screw 2.Two screw rods can be multi-turn uniform pitchs, also can be variable pitchs.Variable pitch is generally than the saving energy about 30% of uniform pitch.Drive screw 1 is convex gear, and driven screw 2 is concave gear, and two screw rods engage each other, and and pump block 3 form some working seal chambeies, the processes such as air-breathing, closed, compression, exhaust can be completed when drive screw 1 rotates.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equal replacement and improvement etc., all should drop within protection scope of the present invention.
Claims (5)
1. a Novel double-screw vacuum pump, comprise screw rod, pump block, synchromesh gear, end cap, bearing, black box, it is characterized in that: described screw rod comprises the contrary drive screw of the different rotation direction of diameter and driven screw, described drive screw and driven screw are contained in pump block, the two ends of pump block are provided with flange, described bearing and black box are contained on the end cap at two ends, the axle sleeve of drive screw and driven screw is in the bearing of two ends end cap, the end cover bolt at two ends is connected on pump block, two synchromesh gears outside end cap fixed by expansion set be contained in drive screw and driven screw respectively central shaft on, fuel tank and motor flange are contained on rear end cover, live axle is equipped with couple axle to be rotated by driven by motor, gas enters from suction port to be got rid of from relief opening.
2. a kind of Novel double-screw vacuum pump according to claim 1, is characterized in that: the diameter of described drive screw is greater than the diameter of driven screw.
3. a kind of Novel double-screw vacuum pump according to claim 2, is characterized in that: the root diameter of described drive screw is equal with the tooth tip diameter of driven screw.
4. a kind of Novel double-screw vacuum pump according to claim 1, is characterized in that: described drive screw and driven screw are multi-turn uniform pitch or variable pitch.
5. a kind of Novel double-screw vacuum pump according to claim 1, is characterized in that: described pump block and cover internal are respectively with the sealing of O type circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410261216.3A CN104373348A (en) | 2014-06-13 | 2014-06-13 | Novel double-screw vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410261216.3A CN104373348A (en) | 2014-06-13 | 2014-06-13 | Novel double-screw vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104373348A true CN104373348A (en) | 2015-02-25 |
Family
ID=52552453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410261216.3A Pending CN104373348A (en) | 2014-06-13 | 2014-06-13 | Novel double-screw vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104373348A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143497A (en) * | 2017-06-29 | 2017-09-08 | 德耐尔节能科技（上海）股份有限公司 | A kind of vacuum pump |
| CN111520321A (en) * | 2020-05-15 | 2020-08-11 | 丁彪 | Mechanical seal chemical pump and use method thereof |
| CN111765175A (en) * | 2020-05-22 | 2020-10-13 | 浙江珂勒曦动力设备股份有限公司 | Bearing cooling structure |
| CN115461541A (en) * | 2020-03-10 | 2022-12-09 | 阿特拉斯·科普柯空气动力股份有限公司 | Lubricant recovery system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86108274A (en) * | 1986-12-17 | 1987-08-19 | 武汉冷冻机厂 | Circular-arc teeth shape of screw type compressor rotor |
| JPS63277885A (en) * | 1987-05-06 | 1988-11-15 | Kobe Steel Ltd | Oil-free screw type vacuum pump |
| CN1760552A (en) * | 2005-11-21 | 2006-04-19 | 西安交通大学 | Method for designing molded lines of rotor of helical lobe compressor |
| CN101634297A (en) * | 2008-07-25 | 2010-01-27 | 株式会社爱德克斯 | Screw pump |
| CN201771762U (en) * | 2010-09-03 | 2011-03-23 | 浙江开山凯文螺杆机械有限公司 | Helical-lobe compressor rotor |
| CN202883379U (en) * | 2012-08-30 | 2013-04-17 | 上海格什特螺杆科技有限公司 | Rotor shaft assembly of screw compressor |
-
2014
- 2014-06-13 CN CN201410261216.3A patent/CN104373348A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86108274A (en) * | 1986-12-17 | 1987-08-19 | 武汉冷冻机厂 | Circular-arc teeth shape of screw type compressor rotor |
| JPS63277885A (en) * | 1987-05-06 | 1988-11-15 | Kobe Steel Ltd | Oil-free screw type vacuum pump |
| CN1760552A (en) * | 2005-11-21 | 2006-04-19 | 西安交通大学 | Method for designing molded lines of rotor of helical lobe compressor |
| CN101634297A (en) * | 2008-07-25 | 2010-01-27 | 株式会社爱德克斯 | Screw pump |
| CN201771762U (en) * | 2010-09-03 | 2011-03-23 | 浙江开山凯文螺杆机械有限公司 | Helical-lobe compressor rotor |
| CN202883379U (en) * | 2012-08-30 | 2013-04-17 | 上海格什特螺杆科技有限公司 | Rotor shaft assembly of screw compressor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107143497A (en) * | 2017-06-29 | 2017-09-08 | 德耐尔节能科技（上海）股份有限公司 | A kind of vacuum pump |
| CN115461541A (en) * | 2020-03-10 | 2022-12-09 | 阿特拉斯·科普柯空气动力股份有限公司 | Lubricant recovery system |
| CN111520321A (en) * | 2020-05-15 | 2020-08-11 | 丁彪 | Mechanical seal chemical pump and use method thereof |
| CN111520321B (en) * | 2020-05-15 | 2022-09-13 | 大连宏亚泵业有限公司 | Mechanical seal chemical pump and use method thereof |
| CN111765175A (en) * | 2020-05-22 | 2020-10-13 | 浙江珂勒曦动力设备股份有限公司 | Bearing cooling structure |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150225 |