An internal outer-circulation driving structure

Abstract

This utility model relates to the field of vacuum pump technology, specifically disclosing a built-in external circulation drive structure installed on a vacuum pump. The vacuum pump includes a drive motor, a gear transmission assembly, a pump housing, and a rotor assembly disposed within the pump housing. The gear transmission assembly is located at both ends of the rotor assembly. The drive motor drives the gear transmission assembly to rotate the rotor assembly. The external circulation drive structure includes a rear connecting housing, which is used to enclose the end of the pump housing. A second pump body is disposed within the rear connecting housing. The second pump body is driven by the gear transmission assembly and is used to drive a second cooling medium to circulate between the pump housing and the outside. This utility model allows for the recycling of the cooling medium and eliminates the need for a separate external motor, saving on external power sources and reducing space occupation.

Description

Technical Field

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

[0002] In the fields of semiconductors, lithium batteries, photovoltaics, steel, chemicals, petroleum, light industry, pharmaceuticals, and food, vacuum filtration, vacuum feeding, vacuum concentration, and vacuum degassing are often required. These processes all rely on vacuum pumps to achieve the required vacuum conditions. Since vacuum pumps generate a lot of heat during operation, cooling water needs to be introduced to cool them down and maintain normal operation. For example, the Roots water ring vacuum pump cooling water circulation device disclosed in patent number CN103047149A exchanges heat with the cooling water and then circulates it. However, in order to achieve water circulation, a separate water pump needs to be configured externally. The water pump also requires an additional motor to drive it, which not only occupies too much space but also has a high cost. Utility Model Content

[0003] The purpose of this invention is to provide a built-in external circulation drive structure 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:

[0005] An internal external circulation drive structure is provided on a vacuum pump. The vacuum pump includes a drive motor, a gear transmission assembly, a pump housing, and a rotor assembly disposed within the pump housing. The gear transmission assembly is located at both ends of the rotor assembly. The drive motor drives the gear transmission assembly to rotate the rotor assembly. The external circulation drive structure includes a rear connecting housing for sealing the end of the pump housing. A second pump body is disposed within the rear connecting housing. The second pump body is driven by the gear transmission assembly and is used to drive a second cooling medium to circulate between the pump housing and the outside.

[0006] Furthermore, a second transmission gear is provided inside the rear connecting housing. The second transmission gear is driven to rotate by a gear transmission group, and the second pump body is driven to move by the second transmission gear.

[0007] Furthermore, the second pump body includes a drive shaft, an outer magnet, an isolation sleeve, and an inner magnet disposed inside the rear connecting housing. The isolation sleeve is located between the outer magnet and the inner magnet. The drive shaft is connected to a second transmission gear and drives the outer magnet to rotate. The outer magnet drives the inner magnet to rotate. The inner magnet is connected to an impeller.

[0008] Furthermore, an outer shell protrudes from the outer side of the rear connecting housing, the outer shell being used to accommodate the second pump body, and the outer shell having a liquid supply chamber, within which the impeller rotates.

[0009] Furthermore, the outer casing is provided with multiple connectors, which are connected to the liquid supply chamber.

[0010] This utility model has the following beneficial effects:

[0011] This invention utilizes the circulating cooling medium introduced into the pump housing to improve the heat dissipation effect on the pump housing and corresponding parts, and eliminates the need for a separate external motor for drive, saving on external power sources and reducing space occupation. Attached Figure Description

[0012] 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.

[0013] Figure 1 This is an overall schematic diagram of the built-in external circulation drive structure of Embodiment 1, excluding the drive motor;

[0014] Figure 2 for Figure 1 A diagram from another perspective;

[0015] Figure 3 for Figure 1 A partially enlarged schematic diagram;

[0016] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure. Detailed Implementation

[0017] 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.

[0018] Example 1

[0019] like Figures 1-4As shown, the built-in external circulation drive structure in this embodiment is installed on the vacuum pump. The vacuum pump conventionally includes a drive motor, a gear transmission group 1, a pump housing 2, and a rotor group installed in the pump housing 2. The gear transmission group 1 is located at both ends of the rotor group. The drive motor drives the gear transmission group 1 to rotate the rotor group. The rotor group consists of two screw rotors to realize the pumping operation. The above is a conventional structure in the field and no further limitations are made here.

[0020] The external circulation drive structure includes a rear connecting housing 10, which is used to enclose the end of the pump housing 2. A second pump body 20 is provided inside the rear connecting housing 10. The second pump body 20 is driven by a gear transmission set 1 and is used to drive the second cooling medium to circulate between the pump housing 2 and the outside.

[0021] Furthermore, a second transmission gear 31 is provided inside the rear connecting housing 10. The second transmission gear 31 is driven to rotate by the gear transmission group 1, and the second pump body 20 is driven to move by the second transmission gear 31. Thus, the second pump body 20 is driven to move by the drive motor of the vacuum pump itself.

[0022] Specifically, the second pump body 20 includes a drive shaft 21, an outer magnet 22, an isolation sleeve 23, and an inner magnet 24 disposed inside the rear connecting housing 10. The isolation sleeve 23 is located between the outer magnet 22 and the inner magnet 24, forming a magnetic coupling pump structure. The drive shaft 21 is connected to the second drive gear 31 and drives the outer magnet 22 to rotate. The outer magnet 22 drives the inner magnet 24 to rotate. The inner magnet 24 is connected to the impeller 25.

[0023] Additionally, a housing 11 protrudes from the outer side of the rear connecting housing 10. The housing 11 is used to accommodate the second pump body 20. The housing 11 has a liquid supply chamber 12. The impeller 25 rotates in the liquid supply chamber 12. The rotation of the impeller 25 realizes the extraction and delivery of the second cooling medium. Correspondingly, the housing 11 is provided with multiple connectors 111. The connectors 111 are connected to the liquid supply chamber 12. The connectors 111 are used to connect pipelines to connect the second cooling medium to the required location, such as the pump housing 2.

[0024] Of course, conventional heat exchangers can also be installed on the outside of the vacuum pump or in other locations. Heat exchangers are conventional accessories in the field and are not further limited here. The second cooling medium is cooled by passing through the heat exchanger and then sent into the pump housing 2 for cooling.

[0025] 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 external circulation drive structure, mounted on a vacuum pump, the vacuum pump comprising a drive motor, a gear transmission assembly, a pump housing, and a rotor assembly disposed within the pump housing, the gear transmission assembly being located at both ends of the rotor assembly, the drive motor driving the gear transmission assembly to rotate the rotor assembly, characterized in that, The external circulation drive structure includes a rear connecting housing, which is used to enclose the end of the pump housing. A second pump body is provided inside the rear connecting housing. The second pump body is driven by a gear transmission set and is used to drive the second cooling medium to circulate between the pump housing and the outside.

2. The built-in external circulation drive structure according to claim 1, characterized in that: The rear connecting housing is provided with a second transmission gear, which is driven to rotate by a gear transmission group, and the second pump body is driven to move by the second transmission gear.

3. The built-in external circulation drive structure according to claim 2, characterized in that: The second pump body includes a drive shaft, an outer magnet, an isolation sleeve, and an inner magnet, which are disposed inside the rear connecting housing. The isolation sleeve is located between the outer magnet and the inner magnet. The drive shaft is connected to a second transmission gear and drives the outer magnet to rotate. The outer magnet drives the inner magnet to rotate. The inner magnet is connected to an impeller.

4. The built-in external circulation drive structure according to claim 3, characterized in that: The rear connecting housing has a protruding outer shell, which is used to accommodate the second pump body. The outer shell has a liquid supply chamber, and the impeller rotates in the liquid supply chamber.

5. The built-in external circulation drive structure according to claim 4, characterized in that: The outer casing is provided with multiple connectors, which are connected to the liquid supply chamber.

Images