Vacuum pump built-in cooling circulation driving structure

Abstract

This utility model relates to the field of vacuum pump technology, specifically disclosing a built-in cooling circulation drive structure for a vacuum pump. The vacuum pump includes a drive motor, a gear transmission assembly, a pump housing, and a rotor disposed within the pump housing. The key feature is that the circulation drive structure includes a front connecting housing disposed between the drive motor and the pump housing. A first pump assembly is disposed within the front connecting housing. The first pump assembly is driven by the gear transmission assembly, and it circulates a first cooling medium from the front connecting housing to the rotor. This utility model achieves automatic circulation of the cooling medium without requiring a separate external motor, thus saving on external power sources.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump technology, specifically to a built-in cooling cycle drive structure for a vacuum pump. Background Technology

[0002] A vacuum pump is a device or equipment that uses mechanical, physical, chemical, or physicochemical methods to evacuate a container and obtain a vacuum. It is used in semiconductors, lithium batteries, photovoltaics, steel, chemicals, petroleum, light industry, pharmaceuticals, and food. During operation, multiple parts of a screw vacuum pump generate heat due to energy conversion and mechanical action. To ensure normal operation, it is necessary to cool them down. For example, the vacuum pump screw rotor cooling system disclosed in patent number CN204082557U achieves direct contact and effective cooling between the cooling water and the rotor surface by setting cooling water channels and spiral channel walls inside the vacuum pump screw rotor. However, this type of cooling structure requires continuous replenishment of cooling water, and the cooling water cannot be circulated. Utility Model Content

[0003] The purpose of this invention is to provide a built-in cooling cycle drive structure for a vacuum pump to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: A built-in cooling circulation drive structure for a vacuum pump is provided, wherein the vacuum pump includes a drive motor, a gear transmission assembly, a pump housing, and a rotor disposed within the pump housing. The characteristic feature is that the circulation drive structure includes a front connecting housing disposed between the drive motor and the pump housing, wherein a first pump assembly is disposed within the front connecting housing. The first pump assembly is driven by the gear transmission assembly, and the first pump assembly circulates a first cooling medium from the front connecting housing to the rotor.

[0005] Furthermore, the front connecting housing has a space for accommodating the first cooling medium, and a protruding plate is provided inside the front connecting housing. The protruding plate has a medium channel and forms a first liquid inlet and a first liquid outlet on the front connecting housing and the protruding plate. The first liquid outlet is connected to the conveying pipe, and the conveying pipe is connected to the inside of the rotor.

[0006] Furthermore, a first transmission gear is provided on the convex plate. The first transmission gear is driven to rotate by a gear transmission group, and the first pump group is driven to move by the first transmission gear. The first pump group is located inside the convex plate.

[0007] Furthermore, the convex plate is provided with a first reflux hole, and the convex plate is provided with an inlet channel and an outlet channel. The inlet channel and the outlet channel are located on both sides of the first pump group. The inlet channel is connected to the first reflux hole, and the outlet channel is connected to the filter. The outer side of the front connecting housing is provided with a first main hole body. The first main hole body is connected to the filter and connected to the heat exchange box. The first liquid inlet hole is connected to the heat exchange box through a pipeline.

[0008] Furthermore, the first cooling medium inside the rotor flows back to the front connecting housing, and the first cooling medium in the front connecting housing is guided to the filter through the first pump body. The first cooling medium in the filter is discharged to the heat exchange box through the first main hole body. After heat exchange, the first cooling medium is drawn into the medium channel and sent into the rotor.

[0009] Furthermore, the filter includes a main housing, a filter cartridge is disposed inside the main housing, the filter cartridge is provided with filter holes, a cover plate is disposed on the filter cartridge to close the main housing, the cover plate is provided with a hole communicating with the interior of the main housing, the hole is located outside the filter cartridge, and a first connector is provided on the cover plate, the first connector communicating with the interior of the filter cartridge and communicating with a first main hole.

[0010] This utility model has the following beneficial effects: This invention enables automatic circulation of the cooling medium, providing a stable and effective rotor heat dissipation effect.

[0011] This invention achieves heat exchange of the cooling medium introduced into the rotor by setting up a heat exchange box.

[0012] This invention uses a drive motor to drive the movement of the inner and outer circulation drive structures, eliminating the need for a separate external motor and saving on external power sources. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the vacuum pump with built-in cooling cycle drive structure combined with the vacuum pump in Example 1; Figure 2 for Figure 1 Enlarged schematic diagram of the location of the central loop drive structure; Figure 3 for Figure 2 Partial schematic diagram; Figure 4 for Figure 3 A diagram from another perspective; Figure 5 for Figure 3 A cross-sectional view of the first position; Figure 6 for Figure 3 A cross-sectional view of the second position; Figure 7 for Figure 4 An exploded view of the filter. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example 1 like Figures 1-7 As shown, the vacuum pump in this embodiment has a built-in cooling cycle drive structure, which is installed inside the vacuum pump. The vacuum pump conventionally includes a drive motor 1, a gear transmission group 2, a pump housing 3, and a rotor installed inside the pump housing 3. The rotor is a twin-screw rotor structure, with the shafts at both ends passing through the gear transmission group 2. The drive motor 1 drives the gear transmission group 2 to move, and the gear transmission group 2 drives the two screw rotors to move synchronously.

[0017] Here, the cyclic drive structure includes a front connecting housing 10 disposed between the drive motor 1 and the pump housing 3. A first pump group 20 is disposed inside the front connecting housing 10. The first pump group 20 is driven by the gear transmission group 2. The first pump group 20 circulates the first cooling medium inside the front connecting housing 10 to the inside of the rotor. The first pump group 20 here adopts a conventional cycloidal rotor pump in the field, but there is no need for an external motor for driving.

[0018] Furthermore, the front connecting housing 10 has a space to accommodate the first cooling medium, forming a lidless box-like structure. The first cooling medium is cooling oil. A protruding plate 11 is provided on the inner wall of the front connecting housing 10. The protruding plate 11 is generally arranged in a cross shape. Two medium channels 12 are provided in the protruding plate 11 in a generally horizontal direction. Two first liquid inlets 13 and two first liquid outlets 14 are formed on the front connecting housing 10 and the protruding plate 11, respectively. The first liquid outlets 14 are connected to the conveying pipe 15. The conveying pipe 15 is connected to the inside of the rotor. The inside of the rotor has a return channel for the cooling oil to return to the internal space of the front connecting housing 10.

[0019] A first transmission gear 101 is provided on the protruding plate 11. The first transmission gear 101 is driven to rotate by the gear transmission group 2. The first pump group 20 is driven to move by the first transmission gear 101. The first pump group 20 is located inside the protruding plate 11. Thus, the first pump group 20 is driven to move by the drive motor 1 of the vacuum pump.

[0020] Furthermore, a first reflux hole 16 is provided on the convex plate 11, and an inflow channel 17 and an outflow channel 18 are provided inside the convex plate 11. The inflow channel 17 and the outflow channel 18 are vertically arranged on both sides of the first pump group 20. The inflow channel 17 is connected to the first reflux hole 16, and the outflow channel 18 is connected to the filter 30. A first main hole body 19 is provided on the outside of the front connecting housing 10. The first main hole body 19 is connected to the filter 30 and is connected to the heat exchange box 40. The first liquid inlet hole 13 is connected to the heat exchange box 40 through a pipeline.

[0021] The heat exchange box 40 typically has a double-layer space, which can be separated by a heat-conducting plate. One layer contains cooling oil, and the other layer contains hot water for heat exchange. The hot water can be supplied by connecting to an external water source, thereby achieving heat exchange. After cooling the cooling oil, it is reintroduced into the rotor.

[0022] Furthermore, the filter 30 includes a main housing 31, a filter cartridge 32 disposed inside the main housing 31, a filter hole 321 disposed on the filter cartridge 32, a cover plate 33 disposed on the filter cartridge 32, the cover plate 33 being used to close the main housing 31, the cover plate 33 being provided with a hole communicating with the interior of the main housing 31, the hole being located on the outside of the filter cartridge 32, and a first connector 34 disposed on the cover plate 33, the first connector 34 communicating with the interior of the filter cartridge 32 and communicating with the first main hole 19. Thus, cooling oil enters the main housing 31 through the hole on the cover plate 33, enters the interior of the filter cartridge 32 after passing through the filter hole 321, and is discharged from the first connector 34 to the first main hole 19.

[0023] The flow path of the cooling oil, i.e. the first cooling medium, is roughly as follows: First, the first cooling medium inside the rotor flows back to the front connecting housing 10. The first cooling medium in the front connecting housing 10 is guided to the filter 30 through the first pump body. The first cooling medium in the filter 30 is discharged to the heat exchange box 40 through the first main hole body 19. After heat exchange, the first cooling medium is drawn into the medium channel 12 and sent back into the rotor.

[0024] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A built-in cooling circulation drive structure for a vacuum pump, disposed within the vacuum pump, the vacuum pump comprising a drive motor, a gear transmission assembly, a pump housing, and a rotor disposed within the pump housing, characterized in that, The cyclic drive structure includes a front connecting housing disposed between the drive motor and the pump housing. A first pump group is disposed inside the front connecting housing. The first pump group is driven by a gear transmission group and cyclically draws the first cooling medium inside the front connecting housing into the rotor.

2. The vacuum pump built-in cooling cycle drive structure according to claim 1, characterized in that: The front connecting housing has a space for accommodating a first cooling medium. A protruding plate is provided inside the front connecting housing. A medium channel is provided inside the protruding plate, and a first liquid inlet and a first liquid outlet are formed on the front connecting housing and the protruding plate. The first liquid outlet is connected to the conveying pipe, and the conveying pipe is connected to the inside of the rotor.

3. The vacuum pump built-in cooling cycle drive structure according to claim 2, characterized in that: The convex plate is provided with a first transmission gear, which is driven to rotate by a gear transmission group. The first pump group is driven to move by the first transmission gear and is located inside the convex plate.

4. The vacuum pump built-in cooling cycle drive structure according to claim 3, characterized in that: The convex plate is provided with a first reflux hole, and the convex plate is provided with an inlet channel and an outlet channel. The inlet channel and the outlet channel are located on both sides of the first pump group. The inlet channel is connected to the first reflux hole, and the outlet channel is connected to the filter. The outer side of the front connecting housing is provided with a first main hole body. The first main hole body is connected to the filter and connected to the heat exchange box. The first liquid inlet hole is connected to the heat exchange box through a pipeline.

5. The vacuum pump built-in cooling cycle drive structure according to claim 3, characterized in that: The first cooling medium inside the rotor flows back to the front connecting housing. The first cooling medium in the front connecting housing is guided to the filter through the first pump body. The first cooling medium in the filter is discharged to the heat exchange box through the first main hole body. After heat exchange, the first cooling medium is drawn into the medium channel and sent into the rotor.

6. The vacuum pump built-in cooling cycle drive structure according to claim 4, characterized in that: The filter includes a main housing, a filter cartridge is disposed inside the main housing, the filter cartridge is provided with filter holes, a cover plate is provided on the filter cartridge to close the main housing, the cover plate is provided with a hole communicating with the interior of the main housing, the hole is located on the outside of the filter cartridge, and a first connector is provided on the cover plate, the first connector communicating with the interior of the filter cartridge and communicating with a first main hole.

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