Dry vacuum pump

Abstract

The utility model provides a dry vacuum pump. The dry vacuum pump comprises a stator shell, a motor, a driving gear, a driven gear, a driving rotor shaft and a driven rotor shaft, wherein the motor is located on the outer side of one end of the stator shell, and the driving gear and the driven gear are located on the outer side of the other end of the stator shell; the driving rotor shaft and the driven rotor shaft are both arranged in the stator shell in a penetrating mode, one end of the driving rotor shaft penetrates through the stator shell to be connected with the motor, and the other end of the driving rotor shaft penetrates through the stator shell to be connected with the driving gear. One end of the driven rotor shaft penetrates through the stator shell and is connected with the driven gear; the driven gear is meshed with the driving gear, and the driving rotor and the driven rotor are meshed in the stator shell. The dry vacuum pump has the advantages that the design is reasonable, the structure of the dry vacuum pump is optimized, the assembling efficiency is remarkably improved, and more convenient conditions are provided for overhauling of the driving gear and the driven gear.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum pumps, and particularly relates to a dry vacuum pump. Background Art

[0002] With the improvement of environmental awareness and the progress of technology, dry vacuum pumps are increasingly widely used in many fields such as medicine, food, chemical industry, and electronics. Especially with the continuous expansion of the new energy vehicle market, the demand for dry vacuum pumps will further increase. In addition, with the rapid development of the semiconductor industry, the demand for dry vacuum pumps in industries such as integrated circuits, photovoltaics, LEDs, flat panel displays, and lithium batteries will also continue to grow.

[0003] At present, there are technical problems in the manufacturing process of dry vacuum pumps, such as too many assembled parts and long time consumption, which in turn lead to high overall manufacturing costs. Moreover, the maintenance operation of dry vacuum pumps is inconvenient. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art and provides a new technical solution for a dry vacuum pump.

[0005] According to one aspect of the present application, a dry vacuum pump is provided, which includes a stator housing, a motor, a driving gear, a driven gear, a driving rotor shaft, and a driven rotor shaft; wherein, the motor is located outside one end of the stator housing, and the driving gear and the driven gear are located outside the other end of the stator housing;

[0006] Both the driving rotor shaft and the driven rotor shaft pass through the inside of the stator housing. One end of the driving rotor shaft passes through the stator housing and is connected to the motor, and the other end passes through the stator housing and is connected to the driving gear; one end of the driven rotor shaft passes through the stator housing and is connected to the driven gear; the driven gear meshes with the driving gear, and the driving rotor on the driving rotor shaft meshes with the driven rotor on the driven rotor shaft inside the stator housing.

[0007] Optionally, a rotor hole is provided at the output end of the motor, and the driving rotor shaft is embedded in the rotor hole.

[0008] Optionally, the dry vacuum pump further includes a frequency converter, and the frequency converter is integrally connected to the motor.

[0009] Optionally, the stator housing includes a casing, a front wall plate, and a rear wall plate; wherein, the casing includes an upper casing and a lower casing;

[0010] The upper housing is detachably mounted above the lower housing, and the front wall plate is detachably mounted on one side of the housing close to the motor; the rear wall plate is detachably mounted on one side of the housing away from the motor;

[0011] One end of the driving rotor shaft passes through the front wall plate, and the other end passes through the rear wall plate;

[0012] One end of the driven rotor shaft passes through the front wall plate, and the other end passes through the rear wall plate.

[0013] Optionally, the dry vacuum pump further includes a plurality of first bolts; the upper housing and the lower housing are connected by the plurality of first bolts.

[0014] Optionally, the dry vacuum pump further includes two first bearings and two second bearings;

[0015] One end of the driving rotor shaft is rotatably connected to the front wall plate through a first bearing, and the other end is rotatably connected to the rear wall plate through another first bearing;

[0016] One end of the driven rotor shaft is rotatably connected to the front wall plate through a second bearing, and the other end is rotatably connected to the rear wall plate through another second bearing.

[0017] Optionally, the dry vacuum pump further includes a first sealing ring and a second sealing ring;

[0018] A first groove is provided on one side of the housing close to the motor or a first groove is provided on one side of the front wall plate close to the housing, and the first sealing ring is partially embedded in the first groove to realize the sealing between the housing and the front wall plate;

[0019] A second groove is provided on one side of the housing away from the motor or a second groove is provided on one side of the rear wall plate close to the housing, and the second sealing ring is partially embedded in the second groove to realize the sealing between the housing and the rear wall plate.

[0020] Optionally, both the first sealing ring and the second sealing ring are O-rings.

[0021] Optionally, the dry vacuum pump further includes a positioning pin;

[0022] A positioning pin is provided between the upper housing and the lower housing;

[0023] and / or, a positioning pin is provided between the front wall plate and the housing;

[0024] and / or, a positioning pin is provided between the rear wall plate and the housing.

[0025] Optionally, the dry vacuum pump further includes a second bolt;

[0026] The motor is fixed to the front wall plate by the second bolt.

[0027] One technical effect of this application is that:

[0028] In the embodiment of this application, the motor is located outside one end of the stator housing, and the driving gear and the driven gear are located outside the other end of the stator housing; moreover, both the driving rotor shaft and the driven rotor shaft pass through the inside of the stator housing. One end of the driving rotor shaft passes through the stator housing and is connected to the motor, and the other end passes through the stator housing and is connected to the driving gear; one end of the driven rotor shaft passes through the stator housing and is connected to the driven gear. That is, the motor is connected to one end of the driving rotor shaft, the other end of the driving rotor shaft is equipped with the driving gear, and the driving gear meshes with the driven gear. Then, when the dry vacuum pump works, the driving gear and the driven gear perform synchronous transmission, prompting the driving rotor shaft and the driven rotor shaft to also rotate synchronously, thereby realizing the suction and exhaust processes of the dry vacuum pump.

[0029] Therefore, the structural design of this dry vacuum pump is reasonable, reducing the number of assembled parts, significantly improving the assembly efficiency, and being beneficial to reducing the manufacturing cost. At the same time, since the driving gear and the driven gear are located outside the stator housing, it is not necessary to disassemble the entire pump during maintenance, thereby providing more convenient conditions for the maintenance of the driving gear and the driven gear, and the maintenance operation is simple. Description of the Drawings

[0030] Figure 1 It is an exploded structural schematic diagram of a dry vacuum pump according to an embodiment of the present utility model;

[0031] Figure 2 It is a schematic diagram of the connection relationship of the motor, driving gear, driven gear, driving rotor shaft, and driven rotor shaft of a dry vacuum pump according to an embodiment of the present utility model.

[0032] In the figure: 1. Motor; 101. Rotor hole; 2. Driving gear; 3. Driven gear; 4. Driving rotor shaft; 41. Driving rotor; 5. Driven rotor shaft; 51. Driven rotor; 61. Upper housing; 62. Lower housing; 63. Front wall plate; 64. Rear wall plate; 71. First bolt; 72. Second bolt; 81. First bearing; 82. Second bearing; 91. First sealing ring; 92. Second sealing ring; 10. Positioning pin. Detailed Embodiments

[0033] Now, various exemplary embodiments of this application will be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps described in these embodiments do not limit the scope of this application.

[0034] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of protection of the present application.

[0035] The terms "first", "second" in the description and claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0036] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0037] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0038] According to one aspect of the present application, referring to Figure 1 and Figure 2 , a dry vacuum pump is provided, which includes a stator housing, a motor 1, a driving gear 2, a driven gear 3, a driving rotor shaft 4 and a driven rotor shaft 5; wherein, the motor 1 is located outside one end of the stator housing, and the driving gear 2 and the driven gear 3 are located outside the other end of the stator housing.

[0039] Specifically, both the driving rotor shaft 4 and the driven rotor shaft 5 are disposed inside the stator housing, and the driving rotor shaft 4 and the driven rotor shaft 5 are respectively rotatably connected to the stator housing; one end of the driving rotor shaft 4 passes through the stator housing and is connected to the motor 1, and the other end passes through the stator housing and is connected to the driving gear 2; one end of the driven rotor shaft 5 passes through the stator housing and is connected to the driven gear 3; the driven gear 3 meshes with the driving gear 2, and the driving rotor 41 on the driving rotor shaft 4 meshes with the driven rotor 51 on the driven rotor shaft 5 inside the stator housing. Among them, since the driving gear 2 drives the driven gear 3 to rotate synchronously, the rotation direction of the driving gear 2 driving the driven gear 3 is opposite, that is, the rotation directions of the driving rotor shaft 4 and the driven rotor shaft 5 are opposite.

[0040] In the embodiment of the present application, the structure of the dry vacuum pump is reasonably designed, the number of assembled parts is reduced, the assembly efficiency is significantly improved, and the manufacturing cost is reduced. At the same time, since the driving gear 2 and the driven gear 3 are located outside the stator housing, it is not necessary to disassemble the whole pump during maintenance, thus providing more convenient conditions for the maintenance of the driving gear 2 and the driven gear 3, and more convenient operations for the later maintenance and replacement of the driving gear 2 and the driven gear 3.

[0041] Exemplarily, the driving rotors at all levels on the driving rotor shaft 4 and the driven rotors at all levels on the driven rotor shaft 5 are located in the internal chambers at all levels of the stator housing, and the driving rotors and the driven rotors at all levels rotate relative to each other, and the stator housing and the internal chambers at all levels are in a stationary and fixed state.

[0042] Optionally, a rotor hole 101 is provided at the output end of the motor 1, and the driving rotor shaft 4 is embedded in the rotor hole 101.

[0043] In the above embodiment, the positioning connection between the output end of the motor 1 and the driving rotor shaft 4 is realized through the rotor hole 101, and the connection method is relatively simple. Moreover, by reducing the cantilever of the motor 1, the natural frequency of the driving rotor 41 on the driving rotor shaft 4 is increased, which helps to reduce the power consumption of the dry vacuum pump and reduce the cost.

[0044] Optionally, the dry vacuum pump further includes a frequency converter, and the frequency converter is integrally connected to the motor 1.

[0045] In the above embodiment, the frequency converter (not shown in the figure) is integrally connected to the motor 1. For example, the frequency converter control hardware is integrated inside the motor 1, so as to upgrade the direct drive of the motor 1 to a frequency conversion drive to realize the automatic adjustment of the motor 1 speed under different load conditions.

[0046] Optionally, the stator housing includes a casing, a front wall plate 63, and a rear wall plate 64; wherein, the casing includes an upper casing 61 and a lower casing 62;

[0047] The upper casing 61 is detachably mounted above the lower casing 62, and the front wall plate 63 is detachably mounted on one side of the casing close to the motor 1; the rear wall plate 64 is detachably mounted on the side of the casing away from the motor 1;

[0048] One end of the driving rotor shaft 4 passes through the front wall plate 63 and is rotatably connected to the front wall plate 63, and the other end passes through the rear wall plate 64 and is rotatably connected to the rear wall plate 64;

[0049] One end of the driven rotor shaft 5 passes through the front wall plate 63 and is rotatably connected to the front wall plate 63, and the other end passes through the rear wall plate 64 and is rotatably connected to the rear wall plate 64.

[0050] In the above embodiment, the structure of the stator housing is reasonably designed, which is not only convenient for assembly, significantly improves the assembly efficiency, reduces the manufacturing cost, but also helps to optimize the volume of the dry vacuum pump, and has good assembly consistency, thereby improving the stability.

[0051] Optionally, the dry vacuum pump further includes a plurality of first bolts 71; the upper casing 61 and the lower casing 62 are connected by the plurality of first bolts 71. This makes the connection relationship between the upper casing 61 and the lower casing 62 relatively simple, and the installation and disassembly are very convenient.

[0052] Optionally, the dry vacuum pump further includes two first bearings 81 and two second bearings 82;

[0053] One end of the driving rotor shaft 4 is rotatably connected to the front wall plate 63 through a first bearing 81, and the other end is rotatably connected to the rear wall plate 64 through another first bearing 81;

[0054] One end of the driven rotor shaft 5 is rotatably connected to the front wall plate 63 through a second bearing 82, and the other end is rotatably connected to the rear wall plate 64 through another second bearing 82.

[0055] In the above embodiment, the connection relationship between the driving rotor shaft 4 and the stator housing is relatively simple, which is convenient for assembling the driving rotor shaft 4 and the stator housing. Moreover, the connection relationship between the driven rotor shaft 5 and the stator housing is relatively simple, which is convenient for assembling the driven rotor shaft 5 and the stator housing.

[0056] Optionally, the dry vacuum pump further includes a first sealing ring 91 and a second sealing ring 92;

[0057] One side of the casing close to the motor 1 is provided with a first groove or one side of the front wall plate 63 close to the casing is provided with a first groove, and a part of the first sealing ring 91 is embedded in the first groove to realize the sealing between the casing and the front wall plate 63;

[0058] One side of the casing away from the motor 1 is provided with a second groove or one side of the rear wall plate 64 close to the casing is provided with a second groove, and a part of the second sealing ring 92 is embedded in the second groove to realize the sealing between the casing and the rear wall plate 64.

[0059] In the above embodiment, the first sealing ring 91 and the second sealing ring 92 can preferably ensure the sealing performance of the stator housing, thereby preferably ensuring the working stability of the dry vacuum pump.

[0060] Optionally, both the first sealing ring and the second sealing ring are O-rings. This makes the structures of the first sealing ring and the second sealing ring more reasonable, facilitating the realization of the sealing between the front wall plate 63 and the casing, and also facilitating the realization of the sealing between the rear wall plate 64 and the casing.

[0061] In a specific embodiment, a special-shaped sealing member is provided between the upper casing 61 and the lower casing 62 to realize the sealing between the upper casing 61 and the lower casing 62, and precise positioning between the upper casing 61 and the lower casing 62 is achieved through positioning pins, and then the upper casing 61 and the lower casing 62 are locked with the first bolt 71. Among them, the special-shaped sealing member can be a regular sealing strip or a special-shaped sealing strip with axial positioning.

[0062] For example, the front wall plate 63 and the casing are fixed by bolts, and the rear wall plate 64 and the casing are also fixed by bolts.

[0063] Optionally, the dry vacuum pump further includes a positioning pin 10;

[0064] A positioning pin is provided between the upper casing 61 and the lower casing 62;

[0065] And / or, a positioning pin is provided between the front wall plate 63 and the casing;

[0066] And / or, a positioning pin is provided between the rear wall plate 64 and the casing.

[0067] In the above embodiment, the positioning pin 10 can realize the precise positioning between the upper casing 61 and the lower casing 62, between the front wall plate 63 and the casing, and between the rear wall plate 64 and the casing, prevent displacement during the assembly of each part, and preferably ensure the assembly consistency of the dry vacuum pump.

[0068] Optionally, the dry vacuum pump further includes a second bolt 72;

[0069] The motor 1 is fixed to the front wall panel 63 by the second bolt 72.

[0070] In the above embodiment, the motor 1 can be quickly and firmly fixed to the front wall panel 63 by the second bolt 72, which is beneficial to simplify the assembly of the motor 1.

[0071] In the embodiment of the present application, the front wall panel 63 and the rear wall panel 64 are respectively assembled on both sides of the casing; at the same time, both ends of the driving rotor shaft 4 are tightly connected to two first bearings 81 assembled on the front wall panel 63 and the rear wall panel 64, and both ends of the driven rotor shaft 5 are tightly connected to two second bearings 82 assembled on the front wall panel 63 and the rear wall panel 64; a first sealing ring 91 is arranged between the casing and the front wall panel 63, and a second sealing ring 92 is arranged between the casing and the rear wall panel 64 to realize the sealing of the stator housing. Further, since the use of bearings is cancelled in the internal structure of the motor 1, the cost of lubricating oil can be saved. At the same time, the application of the coupling between the motor 1 and the driving rotor shaft 4 is cancelled, which reduces costs and improves efficiency while avoiding deviations in the manufacturing and assembly processes, and the assembly consistency is good. Therefore, the dry vacuum pump has a simple structure, good assembly consistency, convenient maintenance and operation. Moreover, it has a smaller volume and lower energy consumption compared with the existing structure, and can significantly improve stability while reducing vibration.

[0072] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

1. A dry vacuum pump, characterized in that: It includes a stator housing, a motor, a driving gear, a driven gear, a driving rotor shaft and a driven rotor shaft; wherein the motor is located outside one end of the stator housing, and the driving gear and the driven gear are located outside the other end of the stator housing; The active rotor shaft and the driven rotor shaft are both inserted into the stator housing; one end of the active rotor shaft passes through the stator housing to be connected to the motor, and the other end passes through the stator housing to be connected to the active gear; one end of the driven rotor shaft passes through the stator housing to be connected to the driven gear; the driven gear is meshed with the active gear, and the active rotor on the active rotor shaft and the driven rotor on the driven rotor shaft are meshed in the stator housing.

2. The dry vacuum pump according to claim 1, characterized in that: The output end of the motor is provided with a rotor hole, and the active rotor shaft is embedded in the rotor hole.

3. The dry vacuum pump according to claim 1, characterized in that: It also includes a frequency converter, which is integrally connected with the motor.

4. The dry vacuum pump according to claim 1, characterized in that: The stator housing includes a casing, a front wall plate, and a rear wall plate; wherein the casing includes an upper casing and a lower casing; The upper housing is detachably mounted above the lower housing, the front wall panel is detachably mounted on a side of the housing close to the motor; the rear wall panel is detachably mounted on a side of the housing away from the motor; One end of the active rotor shaft is passed through the front wall plate, and the other end is passed through the rear wall plate; One end of the driven rotor shaft is passed through the front wall plate, and the other end is passed through the rear wall plate.

5. The dry vacuum pump according to claim 4, characterized in that: It also includes a plurality of first bolts; the upper casing and the lower casing are connected by the plurality of first bolts.

6. The dry vacuum pump according to claim 4, characterized in that: Also included are two first bearings and two second bearings; One end of the active rotor shaft is rotatably connected to the front wall plate through a first bearing, and the other end is rotatably connected to the rear wall plate through another first bearing; One end of the driven rotor shaft is rotatably connected to the front wall plate through a second bearing, and the other end is rotatably connected to the rear wall plate through another second bearing.

7. The dry vacuum pump according to claim 4, characterized in that: Also includes a first sealing ring and a second sealing ring; A first groove is provided on a side of the housing close to the motor or a first groove is provided on a side of the front wall plate close to the housing, and the first sealing ring is partially embedded in the first groove to achieve sealing between the housing and the front wall plate; A second groove is provided on the side of the casing away from the motor or a second groove is provided on the side of the rear wall plate close to the casing, and the second sealing ring is partially embedded in the second groove to achieve sealing between the casing and the rear wall plate.

8. The dry vacuum pump according to claim 7, characterized in that: The first sealing ring and the second sealing ring are both O-rings.

9. The dry vacuum pump according to claim 4, characterized in that: Also included are dowel pins; A positioning pin is provided between the upper housing and the lower housing; And / or, a positioning pin is provided between the front wall plate and the housing; And / or, positioning pins are provided between the rear wall plate and the casing.

10. The dry vacuum pump according to claim 4, characterized in that: Also included is a second bolt; The motor is fixed to the front wall plate by the second bolts.

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