CN106837788A - Oil-free negative and positive birotor screw rod - Google Patents
Oil-free negative and positive birotor screw rod Download PDFInfo
- Publication number
- CN106837788A CN106837788A CN201710030443.9A CN201710030443A CN106837788A CN 106837788 A CN106837788 A CN 106837788A CN 201710030443 A CN201710030443 A CN 201710030443A CN 106837788 A CN106837788 A CN 106837788A
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- China
- Prior art keywords
- screw rod
- positive
- birotor
- oil
- yin
- 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
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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
- F04C18/10—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 internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member
- F04C18/107—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 internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member with helical teeth
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Oil-free negative and positive birotor screw rod disclosed in this invention, including positive screw rod, the female screw that relatively positive screw rod is set, the positive screw rod has been collectively forming an inter-tooth volume with two teeth portion of female screw, and the size of the inter-tooth volume is continually changing with the rotation of yin, yang screw rod；The positive screw rod is 4: 6 with the specific lobe of female screw, and the positive screw rod is asymmetrical relative to one another with female screw.The present invention is by the structure setting to positive screw rod and female screw non-corresponding, so during each comfortable rotation of yin, yang screw rod, teeth portion on its yin, yang screw rod is more abundant to the gas compression that inter-tooth volume absorbs, and can be completely exhausted out, and then realize using the oil-free negative and positive birotor screw rod prepare air compressor high-performance, reach the purpose that compressed air is heated and gas high can drive.
Description
Technical field
The invention belongs to oil free screw technical field, more particularly to a kind of oil-free negative and positive birotor screw rod.
Background technology
It is appreciated that oil-free twin-screw generally comprises positive screw rod, and the female screw matched with positive screw rod, and positive screw rod and the moon
Screw rod is assemblied in when in casing jointly, and the teeth portion of its yin, yang screw rod can form an inter-tooth volume jointly, and can be according to external turn
Rotation of the motivation structure to yin, yang screw rod drives to realize to adjusting the size of inter-tooth volume, and then realizes the effect of suction and discharge.
Be before current existing oil-free twin-screw, its positive screw rod and female screw it is symmetrically arranged, specifically, positive screw rod and the moon
Screw rod is assemblied in when on casing jointly, is parallel setting between positive screw rod and the plane that center line on female screw is formed by connecting and ground
Put, and positive screw rod and the maximum outside diameter of teeth portion on female screw are the same, thus cause positive screw rod mutual with female screw
During cooperation, the gas compression that the inter-tooth volume that both is collectively forming is absorbed is not abundant enough, correspondingly, by the yin, yang screw rod
The intensity of the suction and discharge produced by work is not high, and the suction and discharge produced when can not thus make full use of oil-free twin-screw to work are special
Point is prepared with efficient air compressor to correspond to.
The content of the invention
Present invention aim at a kind of oil-free negative and positive birotor screw rod for solving above-mentioned technical problem of offer, the wherein oil-free
Between female screw and positive screw rod it is each other asymmetric in negative and positive birotor screw rod.
In order to solve the above technical problems, the present invention provides a kind of oil-free negative and positive birotor screw rod, including positive screw rod, relatively sun
The female screw that screw rod is set, the positive screw rod has been collectively forming an inter-tooth volume with two teeth portion of female screw, and the between cog holds
Long-pending size is continually changing with the rotation of yin, yang screw rod；It is characterized in that：The positive screw rod is 4 with the specific lobe of female screw∶6,
And it is asymmetrical relative to one another between the positive screw rod and female screw.
As preferred scheme of the invention, joint face between the center line and the center line of female screw of the positive screw rod with
Shape has angle P between ground, wherein, 25 °≤P≤35 °.
Used as preferred scheme of the invention, the angle P is 30 °.
4th, oil-free negative and positive birotor screw rod according to claim 1, it is characterised in that：Teeth portion on the positive screw rod
Maximum outside diameter of the maximum outside diameter more than teeth portion on the female screw.
Used as preferred scheme of the invention, the maximum outside diameter of teeth portion is outer with the maximum of teeth portion on female screw on the positive screw rod
Difference between footpath is not more than 5 percent of teeth portion maximum outside diameter on the positive screw rod.
As preferred scheme of the invention, at least one is offered respectively on the outer face of teeth portion on the yin, yang screw rod
Seal groove, and the seal groove encloses the shaft on correspondence yin, yang screw rod.
Used as preferred scheme of the invention, the positive screw rod offers two respectively with female screw on the outer face of its teeth portion
Individual seal groove.
As preferred scheme of the invention, 4 spiral shells are equably offered on the yin, yang screw rod on the outer face of shaft
Silk hole, and the center of gravity of 4 screw holes is arranged on correspondence yin, yang screw rod on the fabrication hole of shaft outer face.
Used as preferred scheme of the invention, the yin, yang screw rod is prepared from by forging part respectively.
Used as preferred scheme of the invention, the material of the yin, yang screw rod is No. 45 steel.
Due to the utilization of above-mentioned technical proposal, oil-free negative and positive birotor screw rod of the invention possesses advantages below：
Oil-free negative and positive birotor screw rod of the invention, by the structure setting to positive screw rod and female screw non-corresponding, so
During each comfortable rotation of yin, yang screw rod, the teeth portion on its yin, yang screw rod is more filled to the gas compression that inter-tooth volume absorbs
Point, and can be completely exhausted out, and then the high-performance of the air compressor prepared using the oil-free negative and positive birotor screw rod is realized, reach
Heated to compressed air and purpose that gas high can drive.
Brief description of the drawings
Fig. 1 represents the structural representation of oil-free negative and positive birotor screw rod of the invention, and wherein yin, yang screw rod is in air-breathing mistake
Cheng Zhong.
Fig. 2 represents the structural representation of oil-free negative and positive birotor screw rod of the invention, the wherein breathing process of yin, yang screw rod
Terminate.
Fig. 3 represents the structural representation of oil-free negative and positive birotor screw rod of the invention, and wherein yin, yang screw rod is in compressed
The initial state of journey.
Fig. 4 represents the structural representation of oil-free negative and positive birotor screw rod of the invention, and wherein yin, yang screw rod is in compressed gas
During body.
Fig. 5 represents the structural representation of oil-free negative and positive birotor screw rod of the invention, wherein yin, yang screw compression gas mistake
Journey terminates.
Fig. 6 represents the structural representation of oil-free negative and positive birotor screw rod of the invention, and wherein yin, yang screw rod is in and was vented
Cheng Zhong.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Oil-free negative and positive birotor screw rod 100 provided by the present invention, including positive screw rod 20, and the relatively positive setting of screw rod 20
Female screw 10, it will be understood that the positive screw rod 20 has been collectively forming an inter-tooth volume, and institute with two teeth portion 121 of female screw 10
The size for stating inter-tooth volume is continually changing with the rotation of yin, yang screw rod (10,20), and then realizes the oil-free negative and positive birotor spiral shell
When bar 100 works, ambient atmos are absorbed, and it is simultaneously last to compress absorbed gas with the teeth portion 121 of yin, yang screw rod (10,20)
Obtain that temperature is high, the compressed gas that gas can be big, the function of then outward being discharged again, and then realize using the oil-free
The high-performance of air compressor prepared by negative and positive birotor screw rod 100, reaches the purpose that compressed air is heated and gas high can drive.
In the present embodiment, the positive screw rod 20 and the specific lobe of female screw 10 are 4∶6, that is, the present embodiment positive screw rod
20 have 4 numbers, and female screw 10 has 6 numbers.And the structure between the positive screw rod 20 and female screw 10 of the present embodiment is not
Symmetrical.
Specifically：Shape between joint face and ground between the center line of the positive screw rod 20 and the center line of female screw 10
Have angle P, wherein, 25 °≤P≤35 °, preferably P=30 °.That is, the positive screw rod 20 of the present embodiment is mutual with female screw 10
It is assembled to when in casing with merging, setting is mutually inclined between its positive screw rod 20 and female screw 10, is so easy to yin, yang spiral shell
Bar (10,20), and can also be by teeth portion 121 on yin, yang screw rod (10,20) specifically for its tooth of the part of compressed gas from air-breathing
Between volume could be arranged to small as far as possible, the gas absorbed during realizing and work the yin, yang screw rod (10,20) fills
Partial compression.Of course, in order to realize the abundant compression of the yin, yang screw rod (10,20) to gas, on its yin, yang screw rod (10,20)
The curved surface of respective molded line also does the improvement of an adaptability compared to existing technology, for details, reference can be made to accompanying drawing.
In addition, positive screw rod 20 in the present embodiment be also configured as from the maximum outside diameter of female screw 10 its teeth portion 121 it is different,
Specifically, the maximum outside diameter of teeth portion 121 is greater than the maximum outside diameter of teeth portion 121 on the female screw 10 on the positive screw rod 20,
And difference on the positive screw rod 20 on the maximum outside diameter and female screw 10 of teeth portion 121 between the maximum outside diameter of teeth portion 121 is little
In 5 percent of the maximum outside diameter of teeth portion 121 on the positive screw rod 20.This has been also to realize the oil-free negative and positive birotor spiral shell
Bar 100 operationally, the abundant compression of the gas absorbed to it and the structure that carries out is improved.
It is appreciated that the oil-free negative and positive birotor screw rod 100 of the present embodiment is operationally, positive screw rod 20 and female screw 10
Inter-tooth volume be successively in air-breathing, compressed gas, scavenging action along the length direction of teeth portion 121.So when by yin, yang
Screw rod (10,20) is assembled to when on casing, and it is derived specifically for the gas that yin, yang screw rod (10,20) is discharged is carried out
Gas outlet is provided on casing, and it will be understood by those skilled in the art that the gas outlet of its casing is provided in neighbouring yin, yang
Shaft 122 is set on screw rod (10,20), and is to use gear between shaft 122 and casing, what bearing was assembled, this
Sample is appreciated that between the shaft 122 of the yin, yang screw rod (10,20) and casing the feelings that inevitably there is gas leakage
Shape.Therefore, the present embodiment offers at least one sealing ring on the yin, yang screw rod (10,20) respectively on the outer face of teeth portion 121
Groove 123, preferentially offers two seal grooves 123, and the seal groove 123 is to enclose correspondence yin, yang screw rod (10,20)
On shaft 122.So during rotation, seal groove 123 thereon can also enter yin, yang screw rod (10,20) therewith
Row high-speed rotation, and an air flow pattern is formd, to stop the leakage of gas by air flow pattern.
As preferred scheme of the invention, on the yin, yang screw rod (10,20) on the outer face of shaft 122 equably
4 screw holes 124 are offered, and the center of gravity of 4 screw holes 124 is arranged on shaft in correspondence yin, yang screw rod (10,20)
On the fabrication hole of 122 outer faces.That is, when the shaft 122 of yin, yang screw rod (10,20) is assembled with gear, bearing,
The present embodiment be specifically with screw to carry out spacing assembling to gear, bearing when, its compare it is existing cooperation is tightened with round nut,
It is not only simple in structure, easy to operate, and the dynamic balance of the yin, yang screw rod (10,20) obtained after assembling will also get well, that is,
Its stability after assembling of the oil-free negative and positive birotor screw rod 100 of the present embodiment is higher.
Used as another improvement of the invention, the yin, yang screw rod (10,20) of the present embodiment is specifically with No. 45 steel matter
Forge part to be prepared from, substitute original mode cast by spheroidal graphite cast-iron, it will be understood that the yin, yang of the present embodiment
Screw rod (10,20) is prepared compared to existing using part is forged, have in terms of density, toughness, hardness, yield rate and air-tightness compared with
Big improvement, the use contracted to gas high pressure when being worked with the oil-free negative and positive birotor screw rod 100 for further meeting the present embodiment
It is required that.
Air-breathing, compressed gas and exhaust three when below with regard to the work of the oil-free negative and positive birotor screw rod 100 of the present embodiment
Individual process, make a concrete explanation explanation：
In the oil-free negative and positive birotor screw rod 100 is in breathing process, positive screw rod 20 turns clockwise, and female screw 10 is inverse
Hour hands rotate.With the setting in motion of yin, yang screw rod (10,20), due to one section of teeth portion 121 on yin, yang screw rod (10,20) by
The inter-tooth volume that is gradually disengaged from and is formed expands, and certain vacuum has been internally formed at it, and inter-tooth volume only with air-breathing
Mouth is connected, therefore gas side flows into wherein under differential pressure action, and realizes getter action.As shown in Figure 1, yin, yang screw rod
(10,20) during rotating, positive screw rod 20 constantly spins off from the teeth groove of female screw 10, and inter-tooth volume constantly expands,
And keep connecting by air entry；As shown in Figure 2, when positive screw rod 20 and the inter-tooth volume of female screw 10 reach maximum, with it is cloudy,
The rotation of positive screw rod (10,20), inter-tooth volume disconnects in this position and air entry, and breathing process just terminates.
During the oil-free negative and positive birotor screw rod 100 is in compressed gas, female screw 10 is to turn clockwise, and
Positive screw rod 20 is rotate counterclockwise.As shown in Figure 3, compression process will start, and the yin, yang screw rod (10,20) is to be in
In one closed space, and inter-tooth volume is about to begin reduction with the rotation of yin, yang screw rod (10,20)；Such as accompanying drawing 4, attached
Shown in Fig. 5, with the rotation of yin, yang screw rod (10,20), inter-tooth volume constantly reduces due to the engagement of teeth portion 121.It is sealed in
The volume occupied by gas in inter-tooth volume also reduces therewith, causes pressure rise, so as to realize the compression process of gas.
During the oil-free negative and positive birotor screw rod 100 is in exhaust, the inter-tooth volume of yin, yang screw rod (10,20)
Connected with gas outlet, that is, started exhaust process, as shown in Figure 6, as inter-tooth volume constantly reduces, with exhaust pressure
The gas of power gradually passes through gas outlet and is discharged, and this process lasts till the type of the end of teeth portion 121 of yin, yang screw rod (10,20)
Line is at a fully engaged, and now, the gas in the inter-tooth volume of yin, yang screw rod (10,20) is completely exhausted out by gas outlet, correspondingly,
The volume of inter-tooth volume is by vanishing.
To sum up, oil-free negative and positive birotor screw rod of the invention, by the structure setting to positive screw rod and female screw non-corresponding,
So during each comfortable rotation of yin, yang screw rod, the gas compression that the teeth portion on its yin, yang screw rod absorbs to inter-tooth volume is more
Plus fully, and can be completely exhausted out, and then realize the property high of the air compressor prepared using the oil-free negative and positive birotor screw rod
Can, reach the purpose that compressed air is heated and gas high can drive.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of oil-free negative and positive birotor screw rod, including positive screw rod (20), the female screw (10) that relatively positive screw rod (20) is set, institute
Two teeth portion (121) for stating positive screw rod (20) and female screw (10) have been collectively forming an inter-tooth volume, and the inter-tooth volume is big
The small rotation with yin, yang screw rod (10,20) is continually changing；It is characterized in that：The positive screw rod (20) and the head of female screw (10)
Number is than being 4∶It is asymmetrical relative to one another between 6, and the positive screw rod (20) and female screw (10).
2. oil-free negative and positive birotor screw rod according to claim 1, it is characterised in that：The center line of the positive screw rod (20)
Shape has angle P and the joint face and ground between the center line of female screw (10) between, wherein, 25 °≤P≤35 °.
3. oil-free negative and positive birotor screw rod according to claim 2, it is characterised in that：The angle P is 30 °.
4. oil-free negative and positive birotor screw rod according to claim 1, it is characterised in that：Teeth portion on the positive screw rod (20)
(121) maximum outside diameter of the maximum outside diameter more than teeth portion (121) on the female screw (10).
5. oil-free negative and positive birotor screw rod according to claim 4, it is characterised in that：Teeth portion on the positive screw rod (20)
(121) difference on maximum outside diameter and female screw (10) between the maximum outside diameter of teeth portion (121) is not more than the positive screw rod
(20) 5 the percent of teeth portion (121) maximum outside diameter on.
6. oil-free negative and positive birotor screw rod according to claim 1, it is characterised in that：On the yin, yang screw rod (10,20)
At least one seal groove (123) is offered on the outer face of teeth portion (121) respectively, and the seal groove (123) is enclosed
Shaft (122) in correspondence yin, yang screw rod (10,20).
7. oil-free negative and positive birotor screw rod according to claim 6, it is characterised in that：The positive screw rod (20) and female screw
(10) two seal grooves (123) are offered respectively on the outer face of its teeth portion (121).
8. oil-free negative and positive birotor screw rod according to claim 1, it is characterised in that：On the yin, yang screw rod (10,20)
4 screw holes (124) are equably offered on the outer face of shaft (122), and the center of gravity of 4 screw holes (124) sets
Put in correspondence yin, yang screw rod (10,20) on the fabrication hole of shaft (122) outer face.
9. oil-free negative and positive birotor screw rod according to claim 1, it is characterised in that：The yin, yang screw rod (10,20) point
Not be prepared from by forging part.
10. oil-free negative and positive screw rod birotor screw rod according to claim 9, it is characterised in that：The yin, yang screw rod (10,
20) material is No. 45 steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710030443.9A CN106837788A (en) | 2017-01-17 | 2017-01-17 | Oil-free negative and positive birotor screw rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710030443.9A CN106837788A (en) | 2017-01-17 | 2017-01-17 | Oil-free negative and positive birotor screw rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106837788A true CN106837788A (en) | 2017-06-13 |
Family
ID=59124424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710030443.9A Pending CN106837788A (en) | 2017-01-17 | 2017-01-17 | Oil-free negative and positive birotor screw rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106837788A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111997896A (en) * | 2020-09-09 | 2020-11-27 | 温州大学 | Oil-free gas contact double-screw compressor |
| CN112295440A (en) * | 2020-11-16 | 2021-02-02 | 天津君宇科技股份有限公司 | Horizontal double-shaft devolatilization machine |
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|---|---|---|---|---|
| CN87100486A (en) * | 1987-01-26 | 1988-08-10 | 武汉冷冻机厂 | The suction end end face has the rotor of helical lobe compressor of connectivity slot |
| CN2091951U (en) * | 1991-06-12 | 1992-01-01 | 郑娱泉 | Screw arbor expander for recovering pressure energy of natural gas |
| CN200978803Y (en) * | 2006-11-13 | 2007-11-21 | 中国北车集团北京南口机车车辆机械厂 | Screw compressor rotor |
| CN201007279Y (en) * | 2007-02-08 | 2008-01-16 | 林朝萍 | Double screw rods air compressor |
| JP2011007048A (en) * | 2009-06-23 | 2011-01-13 | Hitachi Plant Technologies Ltd | Screw compressor |
| CN102352846A (en) * | 2011-10-25 | 2012-02-15 | 上海戈里流体机械有限公司 | Oil-free dry screw compressor rotor |
| CN202326245U (en) * | 2011-11-18 | 2012-07-11 | 烟台哈特福德压缩机有限公司 | Rotor device driving male rotor by female rotor of screw compressor |
| CN103032312A (en) * | 2012-12-17 | 2013-04-10 | 重庆大学 | Combined screw rod and forming process |
| CN206477994U (en) * | 2017-01-17 | 2017-09-08 | 张善君 | Oil-free negative and positive birotor screw rod |
-
2017
- 2017-01-17 CN CN201710030443.9A patent/CN106837788A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87100486A (en) * | 1987-01-26 | 1988-08-10 | 武汉冷冻机厂 | The suction end end face has the rotor of helical lobe compressor of connectivity slot |
| CN2091951U (en) * | 1991-06-12 | 1992-01-01 | 郑娱泉 | Screw arbor expander for recovering pressure energy of natural gas |
| CN200978803Y (en) * | 2006-11-13 | 2007-11-21 | 中国北车集团北京南口机车车辆机械厂 | Screw compressor rotor |
| CN201007279Y (en) * | 2007-02-08 | 2008-01-16 | 林朝萍 | Double screw rods air compressor |
| JP2011007048A (en) * | 2009-06-23 | 2011-01-13 | Hitachi Plant Technologies Ltd | Screw compressor |
| CN102352846A (en) * | 2011-10-25 | 2012-02-15 | 上海戈里流体机械有限公司 | Oil-free dry screw compressor rotor |
| CN202326245U (en) * | 2011-11-18 | 2012-07-11 | 烟台哈特福德压缩机有限公司 | Rotor device driving male rotor by female rotor of screw compressor |
| CN103032312A (en) * | 2012-12-17 | 2013-04-10 | 重庆大学 | Combined screw rod and forming process |
| CN206477994U (en) * | 2017-01-17 | 2017-09-08 | 张善君 | Oil-free negative and positive birotor screw rod |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111997896A (en) * | 2020-09-09 | 2020-11-27 | 温州大学 | Oil-free gas contact double-screw compressor |
| CN112295440A (en) * | 2020-11-16 | 2021-02-02 | 天津君宇科技股份有限公司 | Horizontal double-shaft devolatilization machine |
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Application publication date: 20170613 |