阅读说明：本技术 爪式螺杆转子结构及螺杆真空泵 (Claw type screw rotor structure and screw vacuum pump ) 是由 郑志 陈宗武 郭金光 张东庆 辛玲玲 王仕生 尚蕾 于 2020-05-09 设计创作，主要内容包括：本发明公开了一种爪式螺杆转子结构及螺杆真空泵,包括两个彼此相邻的转子,相邻的所述转子通过啮合驱动气体定向流动；所述转子具有转子轴、以及装配于所述转子轴上的多个转子片；多个所述转子片依次装配于所述转子轴上；所述转子片形成有远离所述转子轴延伸的啮合爪结构；同一转子的相邻所述转子片的圆周角度差为θ,相邻所述转子的转子片依次啮合以驱动气体定向流动。本发明的转子结构采用多个相互叠装的转子片,能够利用通用设备加工成型,片状结构的转子片加工精度高,转子直径不受加工设备和加工能力的限制,显著降低了大型螺杆加工的难度,使得大型螺杆真空泵的生产制造成为可能。(The invention discloses a claw-type screw rotor structure and a screw vacuum pump, which comprise two mutually adjacent rotors, wherein the adjacent rotors drive gas to directionally flow through meshing; the rotor has a rotor shaft, and a plurality of rotor sheets mounted on the rotor shaft; a plurality of the rotor sheets are sequentially assembled on the rotor shaft; the rotor sheet is formed with an engagement claw structure extending away from the rotor shaft; the difference of the circumferential angles of the adjacent rotor sheets of the same rotor is theta, and the rotor sheets of the adjacent rotors are sequentially meshed to drive the gas to flow directionally. The rotor structure of the invention adopts a plurality of rotor sheets which are mutually stacked, can be processed and molded by using general equipment, has high processing precision of the rotor sheets with sheet structures, has no limitation of processing equipment and processing capacity on the diameter of the rotor, obviously reduces the processing difficulty of large-scale screw rods, and makes the production and the manufacture of large-scale screw vacuum pumps possible.)

1. Claw screw rotor structure, characterized in that, this rotor structure (10) includes:

two rotors adjacent to each other;

the adjacent rotors drive the gas to directionally flow through meshing;

the rotor has a rotor shaft, and a plurality of rotor sheets mounted on the rotor shaft;

a plurality of the rotor sheets are sequentially assembled on the rotor shaft;

the rotor sheet is formed with an engagement claw structure extending away from the rotor shaft;

the circumferential angle difference of adjacent rotor sheets of the same rotor is theta;

wherein b is the thickness of the rotor sheet;

p is the rotor pitch;

the rotor sheets of adjacent rotors are sequentially meshed to drive the directional flow of gas.

2. Claw screw rotor structure according to claim 1, characterized in that adjacent rotors are configured as a driving rotor (1) and a driven rotor (2), respectively;

the drive rotor (1) has a plurality of drive rotor segments (102) mounted on a drive rotor shaft (101);

the driven rotor (2) having a plurality of driven rotor segments (202) fitted on a driven rotor shaft (201);

the driving rotor sheets (102) of the driving rotor (1) are sequentially meshed with the driven rotor sheets (201) of the driven rotor (2) to drive the gas to flow directionally;

the driving rotor (1) and the driven rotor (2) are driven by a synchronous gear to form synchronous rotation;

the rotation direction of the driving rotor (1) is opposite to that of the driven rotor (2).

3. The claw screw rotor structure according to claim 2, wherein the driving rotor sheet (102) comprises:

a drive rotor assembly (10201) and a drive rotor engagement claw projecting from the drive rotor assembly (10201) and extending along an arcuate path;

the driving rotor assembly (10201) has a first shaft hole (10204);

the driving rotor sheet (102) is fitted to the driving rotor shaft (101) through the first shaft hole (10204);

the driven rotor sheet (202) includes:

a driven rotor assembly (20201) and a driven rotor engaging claw projecting from the driven rotor assembly (20201) and extending along an arc-shaped locus;

the driven rotor assembly (20201) has a second shaft hole (20204);

the driven rotor sheet (202) is fitted to the driven rotor shaft (201) through the second shaft hole (20204);

the extension direction of the arc-shaped track of the driving rotor meshing claw is opposite to that of the arc-shaped track of the driven rotor meshing claw, and the driving rotor meshing claw is meshed with the driven rotor meshing claw to drive gas to flow directionally.

4. A claw screw rotor structure according to claim 3, characterized in that the arc-shaped face of the driving rotor engagement claw is configured as a driving rotor profile (10202) and the end of the driving rotor engagement claw remote from the end of the driving rotor assembly (10201) is configured as a driving rotor nose (10203);

the arc-shaped surface of the driven rotor engaging claw is configured as a driven rotor profile surface (20202), and the end of the driven rotor engaging claw far away from one end of the driven rotor assembly (20201) is configured as a driven rotor rear claw (20203);

the driving rotor profile (10202) and the driven rotor profile (20202) extend in opposite directions;

the driving rotor front claw (10203) is meshed and moves along the driven rotor profile surface (20202) to form a first sealing pair;

the driven rotor rear claw (20203) is meshed and moves along the driving rotor profile surface (10202) to form a second sealing pair;

the formation and movement of the first sealing pair and the second sealing pair are used for driving the gas to flow directionally.

5. A claw screw rotor structure according to claim 3 or 4, wherein the engaging claws of each rotor plate on the same rotor shaft are arranged along a spiral line, and the engaging claws of the rotor plates form a spiral rotor structure after the rotor plates are stacked.

6. Screw vacuum pump comprising a pump body (3), characterized in that a claw screw rotor structure (10) according to any one of claims 1 to 5 is integrated in the pump body (3).

7. Screw vacuum pump according to claim 6, characterized in that the pump body (3) comprises a first and a second pump body of one-piece construction;

the first pump body is formed with a first rotor cavity (301);

the second pump body is formed with a second rotor cavity (302);

the first rotor cavity (301) and the second rotor cavity (302) are communicated and partially overlapped;

the driving rotor (1) is embedded in the first rotor cavity (301);

the driven rotor (2) is embedded in the second rotor cavity (302).

Technical Field

The invention relates to the technical field of screw vacuum pumps, in particular to a claw-type screw rotor structure and a screw vacuum pump.

Background

Compared with other types of vacuum pumps, the screw vacuum pump is a dry type multi-stage vacuum pump, does not pollute a vacuum system in the working process, is low-carbon and environment-friendly, can keep higher pumping speed in a wider pressure range, has short gas channel in the pump, is easy to carry out antiseptic treatment, has wide application range, and is widely applied in various fields.

At present, the pumping rate of domestic external screw vacuum pumps is below 200L/s and is mainly limited by the processing capacity of the screws, so that the large-scale screw vacuum pump cannot be manufactured, popularized and applied.

Disclosure of Invention

The invention aims to provide a claw type screw rotor structure and a screw vacuum pump which are suitable for a large screw vacuum pump and can be machined and manufactured on general equipment.

In order to achieve the above purpose, the invention provides the following technical scheme:

the claw type screw rotor structure of the invention comprises:

two rotors adjacent to each other;

the adjacent rotors drive the gas to directionally flow through meshing;

the rotor has a rotor shaft, and a plurality of rotor sheets mounted on the rotor shaft;

a plurality of the rotor sheets are sequentially assembled on the rotor shaft;

the rotor sheet is formed with an engagement claw structure extending away from the rotor shaft;

the circumferential angle difference of adjacent rotor sheets of the same rotor is theta;

wherein b is the thickness of the rotor sheet;

p is the rotor pitch;

the rotor sheets of adjacent rotors are sequentially meshed to drive the directional flow of gas.

Further, adjacent rotors are respectively configured as a driving rotor and a driven rotor;

the drive rotor has a plurality of drive rotor segments mounted on a drive rotor shaft;

the driven rotor has a plurality of driven rotor segments mounted on a driven rotor shaft;

the driving rotor sheets of the driving rotor are sequentially meshed with the driven rotor sheets of the driven rotor to drive the gas to flow directionally;

the driving rotor and the driven rotor are driven by a synchronous gear to form synchronous rotation;

the rotation direction of the driving rotor is opposite to that of the driven rotor.

Further, the active rotor sheet includes:

the driving rotor assembly comprises a driving rotor assembly body and a driving rotor meshing claw which protrudes out of the driving rotor assembly body and extends along an arc-shaped track;

the driving rotor assembly body is provided with a first shaft hole;

the driving rotor plate is assembled to the driving rotor shaft through the first shaft hole;

the driven rotor sheet includes:

the driven rotor assembly comprises a driven rotor assembly body and a driven rotor meshing claw which protrudes out of the driven rotor assembly body and extends along an arc-shaped track;

the driven rotor assembly has a second shaft bore;

the driven rotor piece is assembled to the driven rotor shaft through the second shaft hole;

the extension direction of the arc-shaped track of the driving rotor meshing claw is opposite to that of the arc-shaped track of the driven rotor meshing claw, and the driving rotor meshing claw is meshed with the driven rotor meshing claw to drive gas to flow directionally;

further, the arc-shaped surface of the driving rotor engagement claw is configured as a driving rotor profile surface, and the end of the driving rotor engagement claw far away from one end of the driving rotor assembly is configured as a driving rotor front claw;

the arc-shaped surface of the driven rotor engagement claw is configured as a driven rotor profile surface, and the end part of the driven rotor engagement claw, which is far away from one end of the driven rotor assembly, is configured as a driven rotor rear claw;

the extension directions of the driving rotor profile surface and the driven rotor profile surface are opposite;

the front claw of the driving rotor is meshed and moves along the profile surface of the driven rotor to form a first sealing pair;

the driven rotor rear claw is meshed with and moves along the profile surface of the driving rotor to form a second sealing pair;

the formation and movement of the first sealing pair and the second sealing pair are used for driving the gas to flow directionally.

Furthermore, the meshing claws of each rotor sheet on the same rotor shaft are arranged along a spiral line, and after the rotor sheets are stacked, the meshing claws of the rotor sheets form a spiral rotor structure.

The invention discloses a screw vacuum pump which comprises a pump body, wherein the claw-type screw rotor structure is integrated in the pump body.

Further, the pump body comprises a first pump body and a second pump body which are of an integrated structure;

the first pump body is provided with a first rotor cavity;

the second pump body is provided with a second rotor cavity;

the first rotor cavity and the second rotor cavity are communicated and partially overlapped;

the driving rotor is embedded in the first rotor cavity;

the driven rotor is embedded in the second rotor cavity.

In the technical scheme, the claw-type screw rotor structure and the screw vacuum pump with the claw-type screw rotor structure have the following beneficial effects:

the rotor structure of the invention adopts a plurality of rotor sheets which are mutually stacked, can be processed and molded by using general equipment, has high processing precision of the rotor sheets with sheet structures, has no limitation of processing equipment and processing capacity on the diameter of the rotor, obviously reduces the processing difficulty of large-scale screw rods, and makes the production and the manufacture of large-scale screw vacuum pumps possible.

The rotor structure and the screw vacuum pump with the rotor structure can meet the requirements of different operation working conditions, so that the design and adjustment of the vacuum pump are easier and more flexible, and the applicability of the screw vacuum pump is obviously improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

Fig. 1 is a schematic structural diagram of a claw screw rotor structure according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a driving rotor of a claw screw rotor structure according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a driving rotor plate of a claw screw rotor structure according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a driven rotor of the claw screw rotor structure provided by the embodiment of the invention;

FIG. 5 is a schematic structural diagram of a driven rotor plate of a claw screw rotor structure according to an embodiment of the present invention;

FIG. 6 is a schematic view of rotor profiles of a claw screw rotor structure according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a screw vacuum pump having a claw screw rotor structure according to an embodiment of the present invention.

Description of reference numerals:

1. a driving rotor; 2. a driven rotor; 3. a pump body;

10. a rotor structure;

101. a driving rotor shaft; 102. an active rotor plate;

10201. a drive rotor assembly; 10202. a drive rotor profile; 10203. a front claw of the driving rotor; 10204. a first shaft hole;

201. a driven rotor shaft; 202. a driven rotor plate;

20201. a driven rotor assembly; 20202. a driven rotor profile; 20203. a driven rotor rear jaw; 20204. a second shaft hole;

301. a first rotor cavity; 302. a second rotor chamber.

Detailed Description

In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.