Vacuum pump rotor structure

Abstract

The utility model discloses a vacuum pump rotor structure which comprises a rotor outer shell, a rotor main body is arranged in the rotor outer shell, the outer wall of the rotor main body is fixedly connected with the inner wall of the rotor outer shell, and the bottom end of the rotor main body extends to the outside of the rotor outer shell and is provided with a hollow connecting column. The outer wall of the hollow connecting column is provided with an external thread, the outer wall of the rotor outer shell is provided with rotary pieces at equal intervals, each rotary piece comprises an aluminum alloy inner base body and a stainless steel outer anti-corrosion layer, the aluminum alloy inner base bodies are arranged in the rotary pieces, and the stainless steel outer anti-corrosion layers are arranged on the outer walls of the aluminum alloy inner base bodies. According to the utility model, not only can the airflow guiding efficiency be improved to the greatest extent and the airflow impact loss be reduced, but also the phenomena of deformation and corrosion of the rotary vane can be reduced, so that the service life of the rotor structure is prolonged, and the purpose of easily and stably positioning the rotor structure is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumps, in particular to a rotor structure of a vacuum pump. Background Technique

[0002] As an indispensable device in modern industry, vacuum pumps are widely used in fields such as semiconductor manufacturing, chemical industry, medical treatment, and aerospace. As the core component of the vacuum pump, the structural design of the rotor directly affects the performance, efficiency, and reliability of the pump. Therefore, developing a rotor structure of a vacuum pump has important practical significance.

[0003] A rotor structure for a vacuum pump with a reference publication number of CN206309599U includes a rotor body. The rotor body adopts a hollow structure and has several redundant cavities. Among them, plastic fillers are arranged in each of the several redundant cavities, and the outer shape of the plastic fillers matches the redundant cavities. The above-mentioned rotor structure for a vacuum pump adds plastic fillers in the redundant cavities on the rotor body, which is not only simple in structure and easy to implement, but also ingeniously designed, effectively reducing the oil accumulation amount in the pump cavity of the vacuum pump and ensuring the reliable stability of the operation of the vacuum pump. According to the above, although this rotor structure can be well applied, it usually does not set vane components with equal spacing, so it is difficult to maximize the guidance of the air flow, not convenient for reducing the air flow impact loss, and still needs to be improved. Content of the Utility Model

[0004] The purpose of the utility model is to provide a rotor structure of a vacuum pump to solve the problem that although the rotor structure can be well applied in the above-mentioned background technique, it usually does not set vane components with equal spacing, so it is difficult to maximize the guidance of the air flow and not convenient for reducing the air flow impact loss.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A rotor structure of a vacuum pump includes a rotor outer shell. A rotor main body is arranged inside the rotor outer shell. The outer wall of the rotor main body is fixedly connected to the inner wall of the rotor outer shell. The bottom end of the rotor main body extends to the outside of the rotor outer shell and is provided with a hollow connecting column. External threads are arranged on the outer wall of the hollow connecting column. Equally spaced vanes are arranged on the outer wall of the rotor outer shell. The vane includes an aluminum alloy inner matrix and a stainless steel outer anti-corrosion layer. The aluminum alloy inner matrix is arranged inside the vane, and the stainless steel outer anti-corrosion layer is arranged on the outer wall of the aluminum alloy inner matrix.

[0006] Preferably, both the rotor outer shell and the rotor main body are arranged in a circular structure, and the inner diameter of the rotor outer shell is equal to the outer diameter of the rotor main body. By making the inner diameter of the rotor outer shell equal to the outer diameter of the rotor main body, the rotor main body can be fixedly arranged on the inner wall of the rotor outer shell.

[0007] Preferably, the rotating vane is arranged in an inclined structure, and the outer wall on one side of the rotating vane is arranged in an arc structure. The inclination angle and length of the rotating vane are precisely calculated to fit the vacuum pump body, so as to maximize the air flow guiding efficiency and reduce the air flow impact loss.

[0008] Preferably, an upper positioning seat is arranged on the inner wall at the upper end of the rotor main body. The upper positioning seat is arranged in an annular structure. Through the arrangement of the upper positioning seat, the upper positioning hole can be arranged.

[0009] Preferably, a lower positioning seat is arranged on the inner wall at the lower end of the rotor main body. The lower positioning seat is arranged in an annular structure. Through the arrangement of the lower positioning seat, the lower positioning hole can be arranged.

[0010] Preferably, equally spaced upper positioning holes are arranged inside the upper positioning seat, and the tops of the upper positioning holes all extend to the outside of the upper positioning seat. Through the arrangement of the upper positioning holes, the rotor structure can be positioned and arranged.

[0011] Preferably, equally spaced lower positioning holes are arranged inside the lower positioning seat, and the bottoms of the lower positioning holes all extend to the outside of the lower positioning seat. Through the arrangement of the lower positioning holes, the rotor structure can be positioned and arranged.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The vacuum pump rotor structure is not only easy to maximize the air flow guiding efficiency and reduce the air flow impact loss, but also can reduce the phenomenon of deformation and corrosion of the rotating vane, so as to extend the service life of the rotor structure, and moreover, it achieves the purpose of being easy to stably position the rotor structure;

[0013] (1) By arranging a plurality of rotating vanes at equal intervals on the outer wall of the rotor housing, the outer wall on one side of the rotating vane is set as an arc structure, the outer wall on the other side of the rotating vane is set as a parallel structure, and the rotating vane as a whole is set as an inclined structure. The inclination angle and length of the rotating vane are precisely calculated to fit the vacuum pump body, so as to be easy to maximize the air flow guiding efficiency and reduce the air flow impact loss;

[0014] (2) The rotating vane is formed by combining an aluminum alloy inner matrix and a stainless steel outer anti-corrosion layer, and the rotating vane and the rotor housing are integrally arranged, thereby improving the firmness between the rotor housing and the rotating vane, and effectively improving the rigid strength and corrosion resistance of the rotating vane, so as to reduce the phenomenon of deformation and corrosion of the rotating vane, and thus extend the service life of the rotor structure;

[0015] (3) By providing a hollow connecting column and external threads at the bottom end of the rotor body, the rotor structure can be installed and connected to the threaded hole preset on the rotating shaft of the vacuum pump by means of threaded connection. The upper positioning hole and the lower positioning hole facilitate bolting the rotor structure to the flange plate reserved inside the threaded hole, thereby achieving the purpose of easily and stably positioning the rotor structure. Description of the Drawings

[0016] Figure 1 It is a schematic top view structure diagram of the present utility model;

[0017] Figure 2 It is a schematic bottom view structure diagram of the present utility model;

[0018] Figure 3 It is a schematic front view structure diagram of the present utility model;

[0019] Figure 4 It is a schematic enlarged cross-sectional view of the sliding vane of the present utility model.

[0020] In the figure: 1, rotor outer housing; 2, sliding vane; 201, aluminum alloy inner matrix; 202, stainless steel outer anti-corrosion layer; 3, rotor body; 4, upper positioning seat; 401, upper positioning hole; 5, lower positioning seat; 501, lower positioning hole; 6, hollow connecting column; 601, external thread. Detailed Embodiment

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1-4 , an embodiment provided by the present utility model: A vacuum pump rotor structure includes a rotor outer housing 1. Both the rotor outer housing 1 and the rotor body 3 are provided in a circular structure, and the inner diameter of the rotor outer housing 1 is equal to the outer diameter of the rotor body 3;

[0023] During use, since the inner diameter of the rotor outer housing 1 is equal to the outer diameter of the rotor body 3, the rotor body 3 can be fixedly arranged on the inner wall of the rotor outer housing 1;

[0024] The rotor body 3 is arranged inside the rotor outer housing 1. The outer wall of the rotor body 3 is fixedly connected to the inner wall of the rotor outer housing 1. An upper positioning seat 4 is arranged on the inner wall of the upper end of the rotor body 3, and the upper positioning seat 4 is arranged in an annular structure;

[0025] During use, through the arrangement of the upper positioning seat 4, the upper positioning hole 401 can be placed and processed;

[0026] The upper positioning seat 4 is internally provided with equally spaced upper positioning holes 401, and the tops of the upper positioning holes 401 all extend to the outside of the upper positioning seat 4;

[0027] During use, through the setting of the upper positioning holes 401, the rotor structure can be positioned and placed;

[0028] A lower positioning seat 5 is provided on the inner wall at the lower end of the rotor body 3, and the lower positioning seat 5 is arranged in an annular structure;

[0029] During use, through the setting of the lower positioning seat 5, the lower positioning holes 501 can be placed and processed;

[0030] The lower positioning seat 5 is internally provided with equally spaced lower positioning holes 501, and the bottoms of the lower positioning holes 501 all extend to the outside of the lower positioning seat 5;

[0031] During use, through the setting of the lower positioning holes 501, the rotor structure can be positioned and placed;

[0032] The bottom end of the rotor body 3 extends to the outside of the rotor housing 1 and is provided with a hollow connecting column 6. An external thread 601 is provided on the outer wall of the hollow connecting column 6. Equally spaced rotating vanes 2 are provided on the outer wall of the rotor housing 1. The rotating vanes 2 are arranged in an inclined structure, and the outer wall on one side of the rotating vanes 2 is arranged in an arc structure;

[0033] During use, through the inclination angle and length of the rotating vanes 2 being precisely calculated to fit the vacuum pump body, the air flow guiding efficiency can be maximally improved and the air flow impact loss can be reduced;

[0034] The rotating vane 2 includes an aluminum alloy inner matrix 201 and a stainless steel outer anti-corrosion layer 202. The aluminum alloy inner matrix 201 is provided inside the rotating vane 2, and the stainless steel outer anti-corrosion layer 202 is provided on the outer wall of the aluminum alloy inner matrix 201.

[0035] When the embodiment of the present application is in use, first, through the setting of the hollow connecting column 6 and the external thread 601, the rotor structure can be installed and connected to the preset threaded hole of the vacuum pump rotating shaft by means of threaded connection. The upper positioning hole 401 and the lower positioning hole 501 are convenient for bolting the rotor structure to the flange reserved inside the threaded hole, so as to easily position and place the rotor structure. Then, the rotating vane 2 is formed by combining the aluminum alloy inner matrix 201 and the stainless steel outer anti-corrosion layer 202, and the rotating vane 2 and the rotor outer housing 1 are integrally arranged. Furthermore, the firmness between the rotor outer housing 1 and the rotating vane 2 can be greatly improved, and the rigid strength and corrosion resistance of the rotating vane 2 can be effectively improved. Finally, a plurality of rotating vanes 2 are arranged at equal intervals on the outer wall of the rotor outer housing 1. The outer wall of one side of the rotating vane 2 is set as an arc structure, the outer wall of the other side of the rotating vane 2 is set as a parallel structure, and the rotating vane 2 is integrally set as an inclined structure. The inclination angle and length of the rotating vane 2 are accurately calculated to fit the vacuum pump body, so as to maximize the air flow guiding efficiency and reduce the air flow impact loss, thus completing the use of the rotor structure.

[0036] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although the present invention has been described above with reference to the embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention can be combined with each other in any way. The reason for not exhaustively describing the situations of these combinations in this specification is only to save space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A vacuum pump rotor structure, characterized in that: It includes a rotor housing (1), inside which a rotor main body (3) is arranged. The outer wall of the rotor main body (3) is fixedly connected to the inner wall of the rotor housing (1). The bottom end of the rotor main body (3) extends to the outside of the rotor housing (1) and is provided with a hollow connecting column (6). An external thread (601) is arranged on the outer wall of the hollow connecting column (6). Equally spaced vanes (2) are arranged on the outer wall of the rotor housing (1). The vane (2) comprises an aluminum alloy inner matrix (201) and a stainless steel outer anti-corrosion layer (202). The aluminum alloy inner matrix (201) is arranged inside the vane (2), and the stainless steel outer anti-corrosion layer (202) is arranged on the outer wall of the aluminum alloy inner matrix (201).

2. The rotor structure of a vacuum pump according to claim 1, characterized in that: Both the rotor housing (1) and the rotor main body (3) are arranged in a circular structure, and the inner diameter of the rotor housing (1) is equal to the outer diameter of the rotor main body (3).

3. A vacuum pump rotor structure according to claim 1, characterized in that: The vane (2) is arranged in an inclined structure, and the outer wall on one side of the vane (2) is arranged in an arc structure.

4. A vacuum pump rotor structure according to claim 1, wherein: An upper positioning seat (4) is arranged on the inner wall at the upper end of the rotor main body (3), and the upper positioning seat (4) is arranged in a ring structure.

5. A vacuum pump rotor structure according to claim 1, characterized in that: A lower positioning seat (5) is arranged on the inner wall at the lower end of the rotor main body (3), and the lower positioning seat (5) is arranged in a ring structure.

6. The rotor structure of a vacuum pump according to claim 4, wherein: Equally spaced upper positioning holes (401) are arranged inside the upper positioning seat (4), and the tops of the upper positioning holes (401) all extend to the outside of the upper positioning seat (4).

7. A vacuum pump rotor structure according to claim 5, characterized in that: Equally spaced lower positioning holes (501) are arranged inside the lower positioning seat (5), and the bottoms of the lower positioning holes (501) all extend to the outside of the lower positioning seat (5).

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