Submersible electric pump

Abstract

The utility model provides a submersible electric pump, which relates to the technical field of water pumps and comprises a motor module and a hydraulic module. The motor module comprises a motor internal structure, an outer cylinder used for surrounding the motor internal structure, and a driving shaft partially extending out of the outer cylinder. The hydraulic module is arranged at the extending end of the driving shaft; the hydraulic module comprises a flow guide shell and an impeller which is contained in the flow guide shell and detachably installed on the driving shaft. A mounting plate is arranged between the outer cylinder body and the flow guide shell; the mounting plate seals and covers the internal structure of the motor in the outer cylinder body; a bearing for rotatably supporting the driving shaft is arranged on the side, close to the interior of the outer barrel, of the mounting plate, and a sealing structure is arranged on the side, close to the hydraulic module, of the mounting plate; the sealing structure is detachably arranged on the mounting plate, and the flow guide shell is detachably mounted on the mounting plate or the sealing structure. The hydraulic module can be conveniently disassembled, maintained and replaced, and the hydraulic performance can be greatly adjusted.

Description

Technical Field

[0001] This application relates to the field of water pump technology, and more particularly to a submersible electric pump. Background Technology

[0002] Submersible pumps are widely used in daily life as a water supply and drainage tool. In recent years, portable high-flow submersible pumps, in particular, have played a vital role in flood control and drought relief due to their small weight and large displacement. During flood control and drought relief operations, the on-site conditions are complex and harsh. On the one hand, different hydraulic performance requirements are needed based on the site conditions; on the other hand, due to the urgency of the situation, equipment maintenance and replacement need to be carried out quickly. Traditional submersible pumps, in order to reduce weight and size, have a high degree of internal integration, with complex relationships between various parts. While achieving portability and compactness, this greatly increases the difficulty of equipment maintenance and parts replacement. At the same time, the performance of a single pump is limited by the hydraulic components, resulting in a limited adjustable range and limited adaptability to complex and changing on-site conditions. Utility Model Content

[0003] The technical problem to be solved by this application is to provide a submersible electric pump in response to the above-mentioned shortcomings of the prior art.

[0004] A submersible electric pump, comprising:

[0005] The motor module includes an internal structure of the motor, an outer cylinder for surrounding the internal structure of the motor, and a drive shaft that extends partially out of the outer cylinder;

[0006] A hydraulic module is disposed at the extended end of the drive shaft; the hydraulic module includes a flow guide housing and an impeller housed within the flow guide housing and detachably mounted on the drive shaft;

[0007] An installation plate is provided between the outer cylinder and the flow guide shell, and the installation plate covers the internal structure of the motor inside the outer cylinder; a bearing for rotatably supporting the drive shaft is arranged on the side of the installation plate near the inside of the outer cylinder, and a sealing structure is arranged on the side of the installation plate near the hydraulic module; the sealing structure is detachably arranged on the installation plate, and the flow guide shell is detachably installed on the installation plate or the sealing structure.

[0008] Optionally, the hydraulic module includes at least an axial flow pump hydraulic module;

[0009] For the axial flow pump hydraulic module, the flow guide housing includes a connecting seat, an impeller chamber, and a rectifier; the impeller is located in the impeller chamber; the connecting seat is located on the side of the impeller chamber closer to the motor module, and the rectifier is located on the side of the impeller chamber away from the motor module;

[0010] The connecting seat is detachably connected to the mounting plate and is provided with a water inlet channel; the rectifier is provided with a water outlet channel.

[0011] Optionally, the impeller chamber is detachably connected to the connecting seat; the impeller chamber is detachably connected to the rectifier.

[0012] Optionally, the hydraulic module includes at least a centrifugal pump hydraulic module.

[0013] Optionally, the sealing structure includes a sealing support fixed to the mounting plate and a mechanical seal device housed within the sealing support;

[0014] The sealing support forms an oil cavity inside, and the oil cavity contains lubricating oil; the mechanical seal device is disposed inside the oil cavity and is surrounded by the lubricating oil inside the oil cavity.

[0015] Optionally, the mechanical seal device is a double-end mechanical seal device.

[0016] Optionally, the sealing support is surrounded by the flow guide housing, and the sealing support and the flow guide housing together form a water inlet channel.

[0017] Optionally, the sealing support has a tapered structure on the side near the impeller to serve as part of the sidewall of the water inlet channel.

[0018] Optionally, the submersible pump is equipped with multiple hydraulic modules of different specifications, and the hydraulic modules of different specifications can be interchanged and installed.

[0019] Optionally, the submersible pump is equipped with various types of hydraulic modules, and each hydraulic module can be interchangeably installed on the motor module; the types of hydraulic modules include at least centrifugal pump hydraulic modules, axial flow pump hydraulic modules, and mixed flow pump hydraulic modules.

[0020] The submersible pump provided in this application has a clear division of its overall structure and functions, which solves the problems of complex structure, numerous interconnected hydraulic and other components, and difficulty in disassembly, replacement and maintenance of traditional submersible pumps. It is a submersible pump structure that allows non-professionals to easily replace different hydraulic and sealing components, and it can be easily disassembled, maintained and replaced with hydraulic modules, and can significantly adjust hydraulic performance. Attached Figure Description

[0021] Figure 1 This is one of the structural schematic diagrams of the submersible electric pump in the embodiments of this application.

[0022] Figure 2 This is the second schematic diagram of the submersible electric pump in the embodiments of this application.

[0023] Figure 3 This is a schematic block diagram of a submersible electric pump in an embodiment of this application.

[0024] Reference numerals: motor module 10, internal structure of motor 11, outer cylinder 12, drive shaft 13, mounting plate 14, bearing 15, hydraulic module 20, flow guide shell 21, connecting seat 211, impeller chamber 212, rectifier 213, impeller 22, sealing structure 30, sealing support 31, conical structure 311, mechanical seal device 32. Detailed Implementation

[0025] The following are specific embodiments of this application, described in conjunction with the accompanying drawings, to further illustrate the technical solutions of this application. However, this application is not limited to these embodiments. In the following description, specific details such as particular configurations and components are provided merely to aid in a comprehensive understanding of the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Furthermore, for clarity and brevity, descriptions of known functions and structures have been omitted.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0027] It should be understood that traditional submersible pumps, in order to reduce weight and size, have a high degree of internal integration, with complex relationships between various components. While achieving a lightweight and compact design, this greatly increases the difficulty of equipment maintenance and parts replacement. At the same time, the performance of a single pump is limited by the hydraulic components, resulting in a limited adjustable range and limited adaptability to complex and changing on-site conditions. Therefore, this application improves the structure to reduce the difficulty of equipment maintenance and parts replacement, and facilitates the replacement of the hydraulic module, in order to better adapt to complex and changing on-site conditions.

[0028] Specifically, in conventional submersible pumps, replacing hydraulic components damages the unit's seals, bearings, lubrication systems, and other structures, affecting the equipment's critical functions and safety performance. The solution proposed in this application structurally differentiates and isolates the functions of each component, enabling independent disassembly and installation of hydraulic and sealing components, thus facilitating easier disassembly and maintenance. Building upon this advantage, it also allows for the replacement of hydraulic components of different specifications and types, thereby achieving a wide range of variations in water delivery performance. A detailed explanation follows with reference to the accompanying drawings.

[0029] refer to Figure 1 and Figure 2The submersible pump includes a motor module 10 and a hydraulic module 20. The motor module 10 includes an internal motor structure 11, an outer cylinder 12, and a drive shaft 13. The outer cylinder 12 surrounds the internal motor structure 11, and a portion of the drive shaft 13 extends out of the outer cylinder 12. The hydraulic module 20 is located at the extended end of the drive shaft 13. The hydraulic module 20 includes a flow guide housing 21 and an impeller 22. The impeller 22 is housed within the flow guide housing 21 and detachably mounted on the drive shaft 13.

[0030] A mounting plate 14 is provided between the outer cylinder 12 and the flow guide shell 21, and the mounting plate 14 encloses the internal structure 11 of the motor inside the outer cylinder 12. A bearing 15 for rotating and supporting the drive shaft 13 is arranged on the side of the mounting plate 14 near the interior of the outer cylinder 12, and a sealing structure 30 is arranged on the side of the mounting plate 14 near the hydraulic module 20. The sealing structure 30 is detachably arranged on the mounting plate 14, and the flow guide shell 21 is detachably mounted on the mounting plate 14 or the sealing structure 30.

[0031] Specifically, the motor module 10, used to provide power, includes an internal motor structure 11, an outer cylinder 12, a drive shaft 13, and a mounting plate 14. The internal motor structure 11 is enclosed by the outer cylinder 12 and the mounting plate 14. The drive shaft 13 extends from one side of the mounting plate 14 to the outside for outputting power. The impeller 22 is mounted on the drive shaft 13 and rotates with the drive shaft 13.

[0032] Furthermore, a bearing 15 is arranged on the side of the mounting plate 14 near the interior of the outer cylinder 12, and a sealing structure 30 is arranged on the side of the mounting plate 14 near the hydraulic module 20. The bearing 15 is used to rotate and support the drive shaft 13, and the sealing structure 30 is used to seal the motor to prevent fluid from entering the interior of the motor module 10. In this structure, the sealing structure 30 is independent of the mounting plate 14 and is detachable from the mounting plate 14. During maintenance, it can be directly removed from the mounting plate 14 without disassembling the mounting plate 14 itself, making maintenance more convenient and less affected by interference from other structures. In addition, compared with the solution where the bearing and sealing structure are integrated on the same mounting base, in this application, the bearing of the drive shaft is mounted on the mounting plate, and the sealing structure is arranged separately from the mounting plate, which reduces the manufacturing precision required for the mounting plate.

[0033] like Figure 1 and Figure 2As shown, in one embodiment, the guide housing 21 is detachably mounted on the mounting plate 14, and the impeller 22 is housed within the guide housing 21 and detachably mounted on the drive shaft 13. Therefore, both the guide housing 21 and the impeller 22 are detachably mounted. When replacing different hydraulic modules 20, the guide housing 21 can be first removed from the mounting plate 14, and then the impeller 22 can be removed from the drive shaft 13. When installing the hydraulic module 20, the new impeller 22 can be first installed on the drive shaft 13, and then the new guide housing 21 can be installed on the mounting plate 14. In other embodiments, the guide housing is detachably mounted on a sealing structure (not shown in the figures), and the disassembly and assembly process is similar and will not be described further here.

[0034] exist Figure 1 and Figure 2 In the structure shown, the sealing structure 30 is surrounded by the flow guide housing 21. When disassembling and maintaining the sealing structure 30, the flow guide housing 21 needs to be disassembled first. Specifically, the flow guide housing 21 is first removed from the mounting plate 14. After maintaining or replacing the sealing structure 30, the flow guide housing 21 is then reinstalled onto the mounting plate 14. This process does not require disassembling the mounting plate 14 or the bearings on the mounting plate 14.

[0035] Further reference Figure 1 ,exist Figure 1 In the structure shown, part A, located above the mounting plate 14, includes the hydraulic module 20 and the sealing structure 30, while part B, located below the mounting plate 14, consists of the internal structure 11 of the motor and the bearing. Disassembling part A does not affect part B; therefore, maintenance of the hydraulic module 20 and the sealing structure 30 is more convenient and unaffected by the structure below the mounting plate 14.

[0036] It should be understood that the hydraulic module 20 can be directly separated and disassembled without affecting the unit's key functional and safety structures such as seals, lubrication, and bearings, thus greatly facilitating the replacement and maintenance of the hydraulic module. When replacing it, a hydraulic module of the same type but with different parameters and specifications can be used, or a different type of hydraulic module can be used to change the type of pump.

[0037] like Figure 3 As shown, the submersible pump includes a motor module and multiple hydraulic modules, including hydraulic module 1, ..., hydraulic module N. All N hydraulic modules can be adapted and installed onto the motor module and can be replaced as needed. In one embodiment, the submersible pump is equipped with multiple hydraulic modules of different specifications, and these different specifications of hydraulic modules can be interchanged and installed interchangeably. Figure 3 In the diagram, hydraulic module 1, ..., hydraulic module N are hydraulic modules of different specifications. Different specifications of hydraulic modules have different parameters. The operating parameters of the pump can be changed by replacing and installing them.

[0038] Furthermore, the submersible pump is equipped with various types of hydraulic modules, and these modules can be interchangeably installed on the motor module. The types of hydraulic modules include at least centrifugal pump hydraulic modules, axial flow pump hydraulic modules, and mixed flow pump hydraulic modules. For example... Figure 3 As shown, the submersible pump includes a motor module and multiple hydraulic modules, including hydraulic module 1, ..., hydraulic module N. All N hydraulic modules can be adapted and installed on the motor module and can be replaced as needed. When different types of hydraulic modules are replaced, the type of submersible pump also changes. Therefore, the type of submersible pump can be changed by replacing the hydraulic modules. For example, hydraulic module 1 is an axial flow pump, and hydraulic module 2 is a centrifugal pump. When hydraulic module 1 replaces hydraulic module 2 on the motor module, the submersible pump changes from an axial flow pump to a centrifugal pump. Specifically, Figure 1 The hydraulic module 20 shown is an axial flow pump structure. Figure 2 The hydraulic module 20 shown is a centrifugal pump structure, and the two can be interchanged for mutual conversion.

[0039] The submersible electric pump provided in this application improves the adjustable range of its performance by replacing and installing hydraulic modules of different specifications and types, thus adapting to a variety of complex and ever-changing usage needs.

[0040] In one embodiment of this application, the hydraulic module includes at least an axial flow pump hydraulic module. (See reference...) Figure 1 For the axial flow pump hydraulic module, the guide housing 21 includes a connecting seat 211, an impeller chamber 212, and a rectifier 213. The impeller 22 is located within the impeller chamber, the connecting seat is located on the side of the impeller chamber closer to the motor module 10, and the rectifier is located on the side of the impeller chamber away from the motor module 10. The connecting seat is detachably connected to the mounting plate 14, which has an inlet channel, and the rectifier 213 has an outlet channel. In one embodiment, the impeller chamber is detachably connected to the connecting seat; the impeller chamber is also detachably connected to the rectifier.

[0041] based on Figure 1The structure shown has a connecting seat 211 detachably mounted on the mounting plate 14 at one end. The impeller chamber 212 is located between the connecting seat 211 and the rectifier 213, and is detachably connected to both the connecting seat 211 and the rectifier 213. The connecting seat 211 has an inlet channel, and the rectifier 213 has an outlet channel. Water entering through the inlet channel is pressurized by the impeller 22 inside the impeller chamber 212 before entering the outlet channel and being discharged. In one specific embodiment, the impeller chamber 212 is detachably connected to the connecting seat 211 and the rectifier 213. Since the impeller chamber 212 is a vulnerable component under certain harsh operating conditions, this detachable connection allows for individual replacement of the impeller chamber 212, thus reducing subsequent maintenance costs. Furthermore, in another specific embodiment, the detachable connection between the connecting seat 211 and the mounting plate 14 is specifically a bolted connection.

[0042] In one embodiment of this application, the hydraulic module includes at least a centrifugal pump hydraulic module. (See reference...) Figure 2 The hydraulic module 20 is configured as a centrifugal pump structure, and the impeller 22 has the impeller structure of a centrifugal pump.

[0043] refer to Figure 1 and Figure 2 In one embodiment of this application, the sealing structure 30 includes a sealing support 31 and a mechanical seal device 32. The sealing support 31 is fixed to the mounting plate 14, and the mechanical seal device 32 is housed within the sealing support 31. An oil cavity is formed inside the sealing support 31, and the oil cavity contains lubricating oil. The mechanical seal device 32 is disposed within the oil cavity and surrounded by the lubricating oil within the oil cavity. In one embodiment, the mechanical seal device 32 is a double-end mechanical seal device 32.

[0044] Specifically, the sealing support 31 is mounted on the mounting plate 14 and is removable. A mechanical seal is installed inside the sealing support 31. The mechanical seal is a double-end mechanical seal, with a friction pair at each end. Lubricating oil is injected into the sealing support 31 to lubricate the mechanical seal and enhance its sealing effect.

[0045] refer to Figure 1 and Figure 2 In one embodiment of this application, the sealing support 31 is surrounded by the flow guide housing 21, and the sealing support 31 and the flow guide housing 21 together form a water inlet channel. In a specific embodiment, the sealing support 31 has a tapered structure 311 on the side near the impeller 22 to serve as part of the sidewall of the water inlet channel. This arrangement makes full use of the external structure of the sealing support 31, and the sealing support 31 and the flow guide housing 21 are combined to form a water inlet channel, resulting in a more compact structure.

[0046] Therefore, the submersible pump provided in this application has a clear division of its overall structure and functions, which solves the problems of complex structure, numerous interconnected hydraulic and other components, and difficulty in disassembly, replacement and maintenance of traditional submersible pumps. It is a submersible pump structure that allows non-professionals to easily replace different hydraulic and sealing components, and enables convenient disassembly, maintenance and replacement of hydraulic modules to significantly adjust hydraulic performance.

[0047] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] The specific embodiments described herein are merely illustrative examples of the spirit of this application. Those skilled in the art to which this application pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this application or exceeding the scope defined by the appended claims.

Claims

1. A submersible electric pump, characterized by, The submersible electric pump comprises: a motor module, including a motor internal structure, an outer cylinder for enclosing the motor internal structure, and a drive shaft partially protruding from the outer cylinder; a water power module arranged at a protruding end of the drive shaft; the water power module includes a flow guide housing and an impeller accommodated in the flow guide housing and detachably mounted on the drive shaft; an installation plate is arranged between the outer cylinder and the flow guide housing, the installation plate covers the motor internal structure in the outer cylinder; a bearing for rotationally supporting the drive shaft is arranged on a side of the installation plate close to the inner part of the outer cylinder, and a sealing structure is arranged on a side of the installation plate close to the water power module; the sealing structure is detachably arranged on the installation plate, and the flow guide housing is detachably mounted on the installation plate or the sealing structure; the water power module at least includes an axial flow pump water power module; for the axial flow pump water power module, the flow guide housing includes a coupling seat, an impeller chamber, and a flow straightener; the impeller is located in the impeller chamber; the coupling seat is located on a side of the impeller chamber close to the motor module, and the flow straightener is located on a side of the impeller chamber away from the motor module; the coupling seat is detachably connected with the installation plate, and a water inlet channel is arranged on the coupling seat; the flow straightener is provided with a water outlet channel.

2. The submersible electric pump according to claim 1, characterized in that, the impeller chamber is detachably connected with the coupling seat; the impeller chamber is detachably connected with the flow straightener.

3. The submersible electric pump according to claim 1, characterized in that, the water power module at least includes a centrifugal pump water power module.

4. The submersible electric pump according to claim 1, characterized in that, the sealing structure includes a sealing support fixed on the installation plate and a mechanical sealing device accommodated in the sealing support; an oil cavity is formed in the inside of the sealing support, and the oil cavity contains lubricating oil; the mechanical sealing device is arranged in the oil cavity and surrounded by the lubricating oil in the oil cavity.

5. The submersible electric pump according to claim 4, characterized in that, the mechanical sealing device is a double-end-face mechanical sealing device.

6. The submersible electric pump according to claim 4, characterized in that, the sealing support is surrounded by the flow guide housing, and the sealing support and the flow guide housing together form a water inlet channel.

7. The submersible electric pump according to claim 6, characterized in that, a conical structure is arranged on a side of the sealing support close to the impeller to serve as part of a side wall of the water inlet channel.

8. The submersible electric pump according to claim 1, characterized in that, the submersible electric pump is provided with multiple water power modules of different specifications, and the water power modules of different specifications can be mutually replaced and mounted.

9. The submersible electric pump according to claim 1 or 8, characterized in that, the submersible electric pump is provided with multiple types of water power modules, and each water power module can be mutually replaced and mounted on the motor module; the types of the water power modules at least include a centrifugal pump water power module, an axial flow pump water power module, and an inclined flow pump water power module.

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