CN111396311A - Hollow screw rotor and processing method thereof - Google Patents
Hollow screw rotor and processing method thereof Download PDFInfo
- Publication number
- CN111396311A CN111396311A CN202010340407.4A CN202010340407A CN111396311A CN 111396311 A CN111396311 A CN 111396311A CN 202010340407 A CN202010340407 A CN 202010340407A CN 111396311 A CN111396311 A CN 111396311A
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- Prior art keywords
- spiral groove
- screw rotor
- connecting shaft
- rotor
- groups
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- Pending
Links
- 238000003672 processing method Methods 0.000 title abstract description 7
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 239000007787 solid Substances 0.000 claims abstract description 8
- 238000000227 grinding Methods 0.000 claims description 7
- 239000011265 semifinished product Substances 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000004323 axial length Effects 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- F04C18/084—Toothed wheels
Abstract
The invention relates to a hollow screw rotor and a processing method thereof, wherein the hollow screw rotor comprises: the rotor body is of a hollow shell structure with two open ends; the outer wall of the first spiral groove is provided with a first rolled spiral groove; two ends of the two groups of sealing sections are respectively corresponding to the two groups of sealing sections, a second spiral groove with the same parameter as the first spiral groove is rolled on the outer wall of each group of sealing sections, and an integral spiral groove structure is formed after the two groups of sealing sections are fixed; the rotation centers of the two groups of seal sections are coaxial with the rotation center of the rotor body; the outer side surfaces of the group of seal sections are fixed with the first connecting shaft; and the outer side surface of the other group of sealing sections is fixed with the second connecting shaft. The invention discloses and provides a hollow screw rotor, which greatly reduces the mass and the rotational inertia of the screw rotor and reduces the material consumption of the traditional integrated screw rotor compared with an integrated solid structure; the processing method reduces the processing time and the processing cost and improves the processing efficiency of the screw rotor.
Description
Technical Field
The invention relates to the technical field of screw rotors, in particular to a hollow screw rotor and a processing method thereof.
Background
The screw air compressor has the advantages of simple structure, reliable work, low noise, convenient regulation and control and the like, and is widely applied to the industries of air power, refrigeration and air conditioning and the like. The double-screw pump and the three-screw pump in the screw pump are also the key points for the development of the hydraulic pump industry in recent years due to the advantages of stable work, large flow, high pressure, simple structure and the like. However, the screw rotor is used as a core component of the screw air compressor and the screw pump, has a complex structure, high requirement on processing precision and high processing difficulty, and is a key point for restricting the screw air compressor and the screw pump from improving the processing efficiency and reducing the production cost.
The traditional screw rotor is generally of a solid structure, a bar is used as a blank, a rough structure of a spiral groove is formed by milling through a special machine tool, and then a final working surface of the screw rotor is formed by grinding through a special grinding machine for the screw rotor. Therefore, the screw rotor has the advantages of long processing period, complex process, high precision requirement, complex structure of required machine tool equipment, high manufacturing difficulty and high early investment cost. The solid screw rotor has the advantages of large mass, large rotational inertia, high required driving power and high processing and manufacturing cost, and restricts the application of products such as a screw air compressor, a screw pump and the like.
Therefore, in order to overcome the defects of large mass and large moment of inertia of the existing solid screw rotor, how to provide a hollow screw rotor structure and greatly reduce the mass of the rotor is a problem which needs to be solved urgently by the technical personnel in the field.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art.
To this end, it is an object of the invention to provide a hollow screw rotor with reduced mass and reduced moment of inertia.
The invention provides a hollow screw rotor, comprising:
the rotor body is of a hollow shell structure with two open ends; the outer wall of the first spiral groove is provided with a first rolled spiral groove;
two ends of the two groups of sealing sections are respectively corresponding to the two groups of sealing sections, a second spiral groove with the same parameter as the first spiral groove is rolled on the outer wall of each group of sealing sections, and an integral spiral groove structure is formed after the two groups of sealing sections are fixed; the rotation centers of the two groups of seal sections are coaxial with the rotation center of the rotor body;
the outer side surfaces of the group of seal sections are fixed with the first connecting shaft;
and the outer side surface of the other group of sealing sections is fixed with the second connecting shaft.
Compared with the prior art, the hollow screw rotor is formed by fixedly connecting the hollow rotor body, the seal section, the first connecting shaft and the second connecting shaft, and compared with an integrated solid structure, the hollow screw rotor greatly reduces the mass and the rotational inertia of the screw rotor, and reduces the material consumption of the traditional integrated screw rotor.
Further, an outer toothed first spiral groove is formed in the outer wall of the rotor body; the inner wall of the first spiral groove is provided with a third spiral groove which is in an inner tooth shape and corresponds to the first spiral groove.
Further, the wall thickness formed by the inner wall and the outer wall of the rotor body is equal.
Furthermore, planes are formed at two ends of the hollow shell structure, each group of sealing sections is of a solid sheet structure, and two end faces are both planes.
Further, the first connecting shaft is a stepped three-section shaft or two-section shaft; the second connecting shaft is a stepped two-section shaft or a stepped three-section shaft.
Another object of the present invention is to provide a method for processing a hollow screw rotor as described above, comprising the steps of:
s1, rolling the profiles according to the external dimension requirements of the rotor body and the seal section respectively; respectively processing a first connecting shaft blank and a second connecting shaft blank according to the size requirement of the connecting shaft;
s2, cutting the rotor body section and the sealing section according to the axial length of the screw rotor;
s3, fixing the two groups of sealing sections cut in the S2 on two side faces of a screw rotor section, and enabling the first spiral groove and the second spiral groove to form a working surface to be processed correspondingly;
s4, respectively and correspondingly fixing the first connecting shaft and the second connecting shaft on the outer side surfaces of the two groups of seal sections in the S3 to form a semi-finished product of the hollow spiral rotor;
and S5, grinding the work surface to be processed of the semi-finished product in the S4 to form the actual work surface of the screw rotor with accurate molded line and high surface quality.
According to the technical scheme, compared with the prior art, the invention discloses the method for processing the hollow screw rotor, the screw rotor is divided into five sections, namely the hollow rotor body, two groups of sealing sections, the first connecting shaft and the second connecting shaft, the hollow rotor body and the two groups of sealing sections roll profiles according to the size requirement, and the processing blanks of the three-section shaft and the two-section shaft can be greatly reduced, so that the processing time and the processing cost are reduced; the rough structure of the spiral grooves of the hollow screw rotors with the same specification is formed in a rolling mode, and then the actual working surface of the screw rotor with accurate molded lines and high surface quality is formed through grinding, so that the processing efficiency of the screw rotor is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a perspective view of a hollow screw rotor according to the present invention;
FIG. 2 is a front view of a hollow screw rotor provided by the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a perspective view of a rotor body of a hollow screw rotor according to the present invention;
FIG. 5 is a perspective view of a seal section of a hollow screw rotor according to the present invention;
in the figure: 1-rotor body, 1-1-outer end face molded line, 1-2-inner end face molded line, 2-sealing section, 2-1-sealing section molded line, 3-first connecting shaft and 4-second connecting shaft.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The embodiment of the invention discloses a variety of hollow screw rotors, which reduces the mass of the screw rotors and reduces the rotational inertia.
Referring to fig. 1 to 5, the present invention provides a hollow screw rotor comprising:
the rotor comprises a rotor body 1, wherein the rotor body 1 is of a hollow shell structure with two open ends; the outer wall of the first spiral groove is provided with a first rolled spiral groove;
two ends of the two groups of sealing sections 2 are respectively corresponding to the two groups of sealing sections 2, a second spiral groove with the same parameter as the first spiral groove is rolled on the outer wall of each group of sealing sections 2, and an integral spiral groove structure is formed after the second spiral groove is fixed; the rotation centers of the two groups of seal sections 2 are coaxial with the rotation center of the rotor body 1;
the outer side surfaces of the group of sealing sections 2 are fixed with the first connecting shaft 3;
and a second connecting shaft 4, and the outer side surface of the other group of sealing sections 2 is fixed with the second connecting shaft 4.
The invention discloses a hollow screw rotor which comprises a hollow rotor body, a sealing section, a first connecting shaft and a second connecting shaft which are fixedly connected.
Wherein, an outer dentate first spiral groove is formed on the outer wall of the rotor body 1; the inner wall of the first spiral groove is provided with a third spiral groove which is in an inner tooth shape and corresponds to the first spiral groove.
Advantageously, the inner and outer walls of the rotor body 1 are formed with equal wall thickness.
Advantageously, the two ends of the hollow shell structure form a plane, each group of sealing sections 2 is a solid sheet structure, and the two end faces are both planes.
In one embodiment of the present invention, the first connecting shaft 3 is a stepped three-section shaft or two-section shaft; the second connecting shaft 4 is a stepped two-section shaft or a stepped three-section shaft.
The invention also provides a processing method of the hollow screw rotor, which comprises the following steps:
s1, rolling the profiles according to the external dimension requirements of the rotor body and the seal section respectively; respectively processing a first connecting shaft blank and a second connecting shaft blank according to the size requirement of the connecting shaft;
s2, cutting the rotor body section and the sealing section according to the axial length of the screw rotor;
s3, fixing the two groups of sealing sections cut in the S2 on two side faces of a screw rotor section, and enabling the first spiral groove and the second spiral groove to form a working surface to be processed correspondingly;
s4, respectively and correspondingly fixing the first connecting shaft and the second connecting shaft on the outer side surfaces of the two groups of seal sections in the S3 to form a semi-finished product of the hollow spiral rotor;
and S5, grinding the work surface to be processed of the semi-finished product in the S4 to form the actual work surface of the screw rotor with accurate molded line and high surface quality.
The invention discloses a processing method of a hollow screw rotor, which divides the screw rotor into five sections, namely a hollow rotor body, two groups of sealing sections, a first connecting shaft and a second connecting shaft, wherein the hollow rotor body and the two groups of sealing sections roll profiles according to the size requirement, and the processing blanks of a three-section shaft and a two-section shaft can be greatly reduced, thereby reducing the processing time and the processing cost; the rough structure of the spiral groove of the hollow screw rotor with the same specification is formed by adopting a rolling mode, and the actual working surface of the screw rotor with accurate forming line (1-1,1-2,2-1) and high surface quality is formed by grinding, so that the processing efficiency of the screw rotor is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (6)
1. A hollow screw rotor, comprising:
the rotor comprises a rotor body (1), wherein the rotor body (1) is of a hollow shell structure with two open ends; the outer wall of the first spiral groove is provided with a first rolled spiral groove;
the two ends of the openings of the two groups of sealing sections (2) respectively correspond to the two groups of sealing sections (2), a second spiral groove with the same parameter as the first spiral groove is rolled on the outer wall of each group of sealing sections (2), and an integral spiral groove structure is formed after the second spiral groove is fixed; the rotation centers of the two groups of sealing sections (2) are coaxial with the rotation center of the rotor body (1);
the outer side surface of one group of the sealing sections (2) is fixed with the first connecting shaft (3);
and the outer side surface of the other group of the sealing sections (2) is fixed with the second connecting shaft (4).
2. A hollow screw rotor according to claim 1, characterized in that the rotor body (1) is formed with an outer toothed first helical groove on its outer wall; and an inner toothed third spiral groove corresponding to the first spiral groove is formed on the inner wall of the first spiral groove.
3. A hollow screw rotor according to claim 2, characterized in that the rotor body (1) has an inner wall and an outer wall with equal wall thickness.
4. A hollow screw rotor according to claim 1, characterized in that the two ends of the hollow shell structure form a plane, each set of the seal segments (2) is a solid sheet structure, and the two end faces are plane.
5. A hollow screw rotor according to claim 1, characterized in that the first connecting shaft (3) is a stepped three-section shaft or two-section shaft; the second connecting shaft (4) is a stepped two-section shaft or a stepped three-section shaft.
6. A method of manufacturing a hollow screw rotor according to any of claims 1 to 5, comprising the steps of:
s1, rolling the profiles according to the external dimension requirements of the rotor body and the seal section respectively; respectively processing a first connecting shaft blank and a second connecting shaft blank according to the size requirement of the connecting shaft;
s2, cutting the rotor body section and the sealing section according to the axial length of the screw rotor;
s3, fixing the two groups of sealing sections cut in the S2 on two side faces of a screw rotor section, and enabling the first spiral groove and the second spiral groove to form a working surface to be processed correspondingly;
s4, respectively and correspondingly fixing the first connecting shaft and the second connecting shaft on the outer side surfaces of the two groups of seal sections in the S3 to form a semi-finished product of the hollow spiral rotor;
and S5, grinding the work surface to be processed of the semi-finished product in the S4 to form the actual work surface of the screw rotor with accurate molded line and high surface quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010340407.4A CN111396311A (en) | 2020-04-26 | 2020-04-26 | Hollow screw rotor and processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010340407.4A CN111396311A (en) | 2020-04-26 | 2020-04-26 | Hollow screw rotor and processing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111396311A true CN111396311A (en) | 2020-07-10 |
Family
ID=71437236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010340407.4A Pending CN111396311A (en) | 2020-04-26 | 2020-04-26 | Hollow screw rotor and processing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111396311A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2608379A (en) * | 2021-06-29 | 2023-01-04 | Edwards Ltd | Screw-type vacuum pump |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US736039A (en) * | 1903-02-10 | 1903-08-11 | Harry Archible Wainwright | Impeller for rotary blowers or pumps. |
| US2714314A (en) * | 1951-05-15 | 1955-08-02 | Howden James & Co Ltd | Rotors for rotary gas compressors and motors |
| US6309195B1 (en) * | 1998-06-05 | 2001-10-30 | Halliburton Energy Services, Inc. | Internally profiled stator tube |
| CN1334904A (en) * | 1999-02-08 | 2002-02-06 | 阿特里尔斯布希股份有限公司 | Twin delivery screws provided for installation in positive-displacement machines, especially pumps |
| US20070140882A1 (en) * | 2003-08-22 | 2007-06-21 | Wilhelm Kachele Gmbh | Eccentric screw pump equipped with erosion-resistant rotor |
| JP2007255280A (en) * | 2006-03-23 | 2007-10-04 | Hitachi Industrial Equipment Systems Co Ltd | Screw rotor and its manufacturing method |
| CN101265816A (en) * | 2007-01-11 | 2008-09-17 | 通用汽车环球科技运作公司 | Rotor assembly and method of forming |
| WO2011069845A2 (en) * | 2009-12-10 | 2011-06-16 | Welser Profile Gmbh | Rotary piston or screw rotor as hollow body made from a cold-rolled steel profile |
| CN108906946A (en) * | 2018-07-24 | 2018-11-30 | 广东斯坦德流体系统有限公司 | A kind of sleeve rotor molding equipment |
| CN212296869U (en) * | 2020-04-26 | 2021-01-05 | 陕西理工大学 | Hollow screw rotor |
-
2020
- 2020-04-26 CN CN202010340407.4A patent/CN111396311A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US736039A (en) * | 1903-02-10 | 1903-08-11 | Harry Archible Wainwright | Impeller for rotary blowers or pumps. |
| US2714314A (en) * | 1951-05-15 | 1955-08-02 | Howden James & Co Ltd | Rotors for rotary gas compressors and motors |
| US6309195B1 (en) * | 1998-06-05 | 2001-10-30 | Halliburton Energy Services, Inc. | Internally profiled stator tube |
| CN1334904A (en) * | 1999-02-08 | 2002-02-06 | 阿特里尔斯布希股份有限公司 | Twin delivery screws provided for installation in positive-displacement machines, especially pumps |
| US20070140882A1 (en) * | 2003-08-22 | 2007-06-21 | Wilhelm Kachele Gmbh | Eccentric screw pump equipped with erosion-resistant rotor |
| JP2007255280A (en) * | 2006-03-23 | 2007-10-04 | Hitachi Industrial Equipment Systems Co Ltd | Screw rotor and its manufacturing method |
| CN101265816A (en) * | 2007-01-11 | 2008-09-17 | 通用汽车环球科技运作公司 | Rotor assembly and method of forming |
| WO2011069845A2 (en) * | 2009-12-10 | 2011-06-16 | Welser Profile Gmbh | Rotary piston or screw rotor as hollow body made from a cold-rolled steel profile |
| CN108906946A (en) * | 2018-07-24 | 2018-11-30 | 广东斯坦德流体系统有限公司 | A kind of sleeve rotor molding equipment |
| CN212296869U (en) * | 2020-04-26 | 2021-01-05 | 陕西理工大学 | Hollow screw rotor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2608379A (en) * | 2021-06-29 | 2023-01-04 | Edwards Ltd | Screw-type vacuum pump |
| WO2023275543A1 (en) * | 2021-06-29 | 2023-01-05 | Edwards Limited | Screw-type vacuum pump |
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