CN1032383A - The rotor of rotary screw machine - Google Patents
The rotor of rotary screw machine Download PDFInfo
- Publication number
- CN1032383A CN1032383A CN 87106893 CN87106893A CN1032383A CN 1032383 A CN1032383 A CN 1032383A CN 87106893 CN87106893 CN 87106893 CN 87106893 A CN87106893 A CN 87106893A CN 1032383 A CN1032383 A CN 1032383A
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- China
- Prior art keywords
- rotor
- mentioned
- plastics
- axle
- fuse
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- 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.)
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- Extrusion Moulding Of Plastics Or The Like (AREA)
- Rotary Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
A kind of rotor that is used for rotary screw machine, particularly a kind of male rotor with spiral leaf and middle groove.The rotor fuse comprises the axle of one first material and is installed in the mesosphere of second material on this.Rotor surface is coated with plastic layer.
The method of making this rotor is a bar to be squeezed into be equivalent to rotor shapes basically, is cut into rotor body then.Wound rotor injection-moulded plastic layer.After processing on the rotor body is portalled, rotor body is installed on the axle.Rotor does not need cutting, and can satisfy accuracy to shape and requirement of strength.
Description
The present invention relates to a kind of rotor that is used for rotary screw machine, relate in particular to a kind of spiral leaf and middle groove of having to form the male rotor on working rotor surface, and by two radial end faces as its axial restraint, this rotor has a fuse and one by plastics, the surface layer with basic uniform thickness that preferably composite plastic is made is coated on the above-mentioned working surface that is made of leaf and groove at least.
The invention still further relates to a kind of method of making this rotor.
Screw rotor is generally made by cutting metal solid blanks.Screw rotor with complex geometric shapes needs high accuracy of manufacturing, and will excise very a large amount of metallic material.These shortcomings are combined, will cause long and cost height of manufacturing cycle.
Therefore, hope always for a long time can be produced screw rotor with a kind of simpler method, and its precision and accuracy requirement are not too strict, so that the manufacturing of screw rotor is based upon on the basis of production in enormous quantities and rational manufacture cost.
Just attempt to make rotor as far back as nineteen fifty-three, as from U. S. Patent 2,868, can recognize significantly in No. 442 with plastics.Disclose a kind of male rotor that is used for sieve Song formula (Lysholm type) rotary screw machine in this patent, it a metal core with plastic overmold and makes.This fuse only is a rotor shaft, and rotor keeps a large amount of plastics.It is big and the rotor of varied in thickness can bring various defectives to make plastics.Big and different contour projector can cause dimensional accuracy lower, in addition, produces shrinking stress in the parts of plastics of rotor and is difficult to avoid.And the tensile strength performance of rotor also will be restricted.Therefore, this rotor only is applicable to small size.
In order to improve intensity, further recognize the employing metal reinforced plastic with the rotor of a metal core of plastic overmold.At U. S. Patent 3,918, a kind of mother rotor that a metal shaft molded plastic becomes that centers on is disclosed in No. 838, plastics are the framework enhancings that have the radially metal dish that is equivalent to rotor profile basically with.Owing to still contact plastics at this moment rotor shaft, all difficulties that inherent shrinking stress brings still exist, particularly when this structure is used to have the male rotor of lot of materials more so.
Make a kind of rotor that is equivalent to the metal core of rotor profile basically, and coating skim plastics also once carried out trial on rotor.The example of this type rotor discloses in 306, No. 352 files at GB1.Metal core is made overall structure with axle in this case.According to the needed material of this rotor shaft, the manufacturing of rotor body comprises a molding step, so then sizable ricing will occur on the outer surface of rotor shaft.Become complicated around metal core molded plastic layer because this ricing can rotor body and around mould between produce in the narrower space and shrink, will hinder the even distribution of plastics in above-mentioned space like this.This ricing also can produce unbalanced centrifugal force in rotor, particularly under high rotating speed.These problems can be before the coating plastic layer working surface of milling or grinding rotor body avoided, even now is done the increase manufacture cost.
Although occurred making rotor with the cancellation cutting with partly plastic in this field, up to the present a kind of solution of satisfaction does not also find, no matter be the top example of mentioning or other similar structure.
One object of the present invention is exactly the rotor that obtains a kind of rotary screw machine, and it without any need for cutting, and can not bring the various defectives that produced in the early stage trial in manufacture process.
Reached such requirement according to an aspect of the present invention, promptly adopting a kind of fuse of introducing the rotor that illustrated is the axle of being made by first material, and being installed on this is the mesosphere of being made by second material.
Various embodiment with advantage of the present invention describes in relevant claim.
The invention still further relates to rotor suitable application on rotary screw machine.
Another object of the present invention is a kind of method of making the said structure rotor of development.
Realized that bar with above-mentioned second material is squeezed into the shape of the working surface of the rotor that is equivalent to have spiral leaf and groove basically continuously, wheel profile after the above-mentioned extruding is cut into the rotor body that its length is equivalent to rotor length, above-mentioned plastic layer is by carrying out injection moulding around above-mentioned rotor body to form the wheel profile of rotor finished product, a center hole processes on above-mentioned rotor body, and above-mentioned rotor body is installed on the axle of above-mentioned first metal.
Below in conjunction with accompanying drawing, by the description to most preferred embodiment of the present invention, further the present invention will be described.
Fig. 1 is the longitudinal cross-section cut-away view of upper half part of rotor of the present invention.
Fig. 2 is the vertical cross-section diagrammatic sketch along the rotor that II among Fig. 1-the II line cuts.
Rotor shown in the figure is the male rotor of rotary screw machine.It has three spiral leaves and middle groove, to be meshed with the groove and the leaf of mother rotor in the compressor.
This rotor has a steel axle 1, the aluminium that is installed with thereon or the rotor body 2 of metal alloy.Rotor body be hot jacket on axle, but also can use other joining method, for example the key formula connects.
The leaf of rotor and groove all coat one deck composite plastic 3, preferably contain 30%, contain the thermoplastic of 50% reinforcing fiber in some cases.Be to adopt polyamide 66 in a most preferred embodiment.The thickness of this layer be several millimeter and the length of fiber be at a few tenths of millimeter to tens millimeters scopes.
Selectively make up by material, the thermal expansion coefficient of rotor body 2 surpasses axle 1, and the thermal expansion coefficient of plastics is the same with the aluminium rotor body big at least, does the thermal stress that produces in the time of can making compressor operating like this and can obtain favourable distribution.
And an end face of rotor is coated with plastic layer 4, with at the rotor tip protection planar end surface in the face of the compressor high-voltage end wall.
Constitute because its structure is three parts, any cutting is not wanted in the manufacturing of rotor profile face.Do rotor body with aluminium, might be by pushing the profile precision that obtains satisfaction and needn't reprocessing to the surface.The low density of material also will reduce unbalanced centrifugal force.By extruding, can make the long vallate bar that has, yet again it be cut into rotor body.After rotor body was installed on the steel axle, plastic layer was coated up.It is undertaken by injection moulding, is about to rotor body and is placed in the mould, and the shape of its internal surface is equivalent to the shape of finished product rotor.In addition, plastic layer also can coat before rotor body is installed on the axle.
By the present invention, a rotor structure that does not need contoured surface to rotor to carry out cutting is realized, and this rotor also can satisfy desired accuracy to shape and intensity.
Claims (6)
1, a kind of rotor that is used for rotary screw machine, particularly a kind of have spiral leaf and middle groove to constitute the male rotor on working rotor surface, and carry out axial restraint by two radial end faces, rotor has a fuse and the basic surface layer (3) uniformly of the thickness that is made of plastics, plastics are composite plastic preferably, at least be coated on the above-mentioned working surface that constitutes by leaf and groove, it is characterized in that: fuse is an axle (1) of being made by first material, and a mesosphere of being made by second material (2) is installed thereon.
2, rotor as claimed in claim 1 is characterized in that: the various materials of rotor are chosen such that to be that the thermal expansion coefficient of plastics is the same with second material big at least, and the second material coefficient of thermal expansion coefficient will surpass first material.
3, rotor as claimed in claim 2 is characterized in that: above-mentioned second material is aluminium or a kind of alloy.
4, as any one described rotor of claim 1 to 3, it is characterized in that: it is one of above-mentioned radial end face (4) at least that above-mentioned plastics also are coated on.
5, rotary screw machine is characterized in that: it disposes as any one described rotor of claim 1 to 4.
6, a kind of method of making as claim 1 to 4 rotor as described in any one, rotor has spiral leaf and middle groove to constitute the working surface of rotor, and carry out axial restraint by two radial end faces, rotor has a fuse and the basic surface layer uniformly of the thickness that is made of plastics, this fuse is the axle of being made by first material, a mesosphere of being made by second material is installed thereon, it is characterized in that:
The bar of-above-mentioned second material is equivalent to have the shape on the working rotor surface of spiral leaf and groove basically by continuously extruded one-tenth,
-above-mentioned wheel the profile that is squeezed into is cut into the rotor body that its length is equivalent to rotor length,
-above-mentioned plastic layer centers on the shape that above-mentioned rotor body is injection moulded into the finished product rotor profile,
-on above-mentioned rotor body, process a center hole,
-above-mentioned rotor body is installed on the axle of being made by above-mentioned first material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87106893 CN1016636B (en) | 1987-10-09 | 1987-10-09 | Rotor for rotary screw machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87106893 CN1016636B (en) | 1987-10-09 | 1987-10-09 | Rotor for rotary screw machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1032383A true CN1032383A (en) | 1989-04-12 |
| CN1016636B CN1016636B (en) | 1992-05-13 |
Family
ID=4815889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87106893 Expired CN1016636B (en) | 1987-10-09 | 1987-10-09 | Rotor for rotary screw machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1016636B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100520072C (en) * | 2003-01-15 | 2009-07-29 | 日立产业有限公司 | Screw compressor and manufacturing method of its rotor |
| CN103333933A (en) * | 2013-05-24 | 2013-10-02 | 桐乡晟泰生物科技有限公司 | Production technology of L-arabinose |
| CN105014324A (en) * | 2015-08-02 | 2015-11-04 | 衢州市易凡设计有限公司 | Machining method for laminated screw shaft |
| CN107448384A (en) * | 2016-05-31 | 2017-12-08 | 苏州艾柏特精密机械有限公司 | Double-screw compressor rotor preparation method |
| CN109763981A (en) * | 2019-02-22 | 2019-05-17 | 浙江凯尼真空设备有限公司 | A kind of composite rotors, the injection mold for producing the rotor and rotor production technology |
| EP4163495A1 (en) | 2021-10-07 | 2023-04-12 | TM.I.C. S.r.l. Termomeccanica Industrial Compressors | Screw compressor |
-
1987
- 1987-10-09 CN CN 87106893 patent/CN1016636B/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100520072C (en) * | 2003-01-15 | 2009-07-29 | 日立产业有限公司 | Screw compressor and manufacturing method of its rotor |
| CN103333933A (en) * | 2013-05-24 | 2013-10-02 | 桐乡晟泰生物科技有限公司 | Production technology of L-arabinose |
| CN105014324A (en) * | 2015-08-02 | 2015-11-04 | 衢州市易凡设计有限公司 | Machining method for laminated screw shaft |
| CN107448384A (en) * | 2016-05-31 | 2017-12-08 | 苏州艾柏特精密机械有限公司 | Double-screw compressor rotor preparation method |
| CN109763981A (en) * | 2019-02-22 | 2019-05-17 | 浙江凯尼真空设备有限公司 | A kind of composite rotors, the injection mold for producing the rotor and rotor production technology |
| CN109763981B (en) * | 2019-02-22 | 2023-11-24 | 威固乐真空设备(浙江)有限公司 | Composite rotor, injection mold for producing rotor and rotor production process |
| EP4163495A1 (en) | 2021-10-07 | 2023-04-12 | TM.I.C. S.r.l. Termomeccanica Industrial Compressors | Screw compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1016636B (en) | 1992-05-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |