A novel split-type submersible axial flow pump

Abstract

This utility model discloses a novel split-type submersible axial flow pump, comprising: a base; a pump section structure mounted on the base, including a pump housing and a pump assembly installed within the pump housing; a motor section structure mounted on the base, including a motor housing and a motor assembly installed within the motor housing and connected to the pump assembly; an inlet pre-embedded pipe connected to the front end of the motor housing; and an outlet pre-embedded pipe connected to the rear end of the pump housing. The pump housing adopts a split-type structure, comprising an upper pump housing and a lower pump housing arranged vertically; the motor housing adopts a split-type structure, comprising an upper motor housing and a lower motor housing arranged vertically. This utility model uses a split-type structure for the pump housing and motor housing, allowing for direct disassembly of either the pump housing or the motor housing for maintenance, facilitating on-site repairs and reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of pump station engineering technology, and in particular to a novel split-type submersible axial flow pump. Background Technology

[0002] Submersible axial-flow pumps are a type of pump that integrates the motor and pump into a single design, operating submerged in water. They boast superior hydraulic performance, a compact structure, require fewer auxiliary devices, and offer high operating efficiency, making them widely used in urban drainage, irrigation, and water environment management. Through optimized hydraulic model design, this pump type effectively reduces hydraulic losses, increases head and flow rate, and meets the demands of high-flow, low-head operating conditions. Furthermore, because its motor operates submerged, it reduces the need for a technical water supply system found in traditional pump types, saving installation space, lowering the failure rate, and improving the stability and reliability of system operation.

[0003] However, despite the numerous performance advantages of submersible axial flow pumps, their structural design still has certain limitations. Currently, most mainstream submersible axial flow pumps on the market adopt an axial series structure, where the motor and pump are arranged in series along the axis. The motor is usually divided into inner and outer casings, with the stator and rotor inside and a sealed outer casing outside. While this structure improves the overall compactness of the pump, it brings considerable inconvenience in inspection and maintenance. Because the motor and pump are integrated, the entire pump body needs to be lifted out of its installation position for disassembly and repair during maintenance. This operation is acceptable for small and medium-sized submersible axial flow pumps, but for large submersible axial flow pumps, their large size and heavy weight make lifting and transportation complex, increasing the difficulty of on-site operations and posing certain safety risks.

[0004] More importantly, when large submersible axial flow pumps experience major malfunctions, they often need to be returned to the factory for professional repairs. Due to the large size and inconvenient transportation of the equipment, the return process is not only time-consuming and costly, but may also cause prolonged interruptions to the operation of the pump station, affecting the normal operation of the entire system. In addition, returning for repairs incurs high transportation and repair costs, further increasing the financial burden on users. Therefore, how to optimize the structural design of submersible axial flow pumps, improve the convenience of on-site repairs, and reduce maintenance costs has become an important issue that urgently needs to be addressed in this field.

[0005] Therefore, through beneficial exploration and research, the applicant has found a solution to the above problems, and the technical solution to be introduced below is the result of this research. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a new type of split-type submersible axial flow pump that reduces maintenance difficulty and cost in order to address the shortcomings of the existing technology.

[0007] The technical problem to be solved by this utility model can be achieved by the following technical solution:

[0008] A novel split-type submersible axial flow pump includes:

[0009] Base;

[0010] The water pump section structure is disposed on the base, the water pump section structure includes a water pump housing and a water pump assembly installed in the water pump housing;

[0011] The motor segment structure is mounted on the base. The motor segment structure includes a motor housing and a motor assembly installed inside the motor housing and connected to the water pump assembly. The rear end of the motor housing is connected to the front end of the water pump housing.

[0012] A pre-embedded pipe at the water inlet end, wherein the pre-embedded pipe at the water inlet end is connected to the front end of the motor housing; and

[0013] A pre-embedded pipe at the water outlet end is connected to the rear end of the water pump housing;

[0014] The water pump housing adopts a split structure, which includes an upper water pump housing and a lower water pump housing arranged in an enclosing manner, and the upper water pump housing and the lower water pump housing are sealed together.

[0015] The motor housing adopts a split structure, which includes an upper motor housing and a lower motor housing arranged in an enclosing manner, and the upper motor housing and the lower motor housing are sealed together.

[0016] In a preferred embodiment of this utility model, the upper pump housing includes an upper transition section housing, an upper impeller housing, and an upper guide vane housing spliced ​​along the water inlet direction. A first upper guide plate is disposed inside the upper transition section housing, and a first upper guide channel is formed between the first upper guide plate and the upper transition section housing. The lower pump housing includes a lower transition section housing, a lower impeller housing, and a lower guide vane housing spliced ​​along the water inlet direction. A first lower guide plate is disposed inside the lower transition section housing, and a first lower guide channel is formed between the first lower guide plate and the lower transition section housing.

[0017] In a preferred embodiment of the present invention, a first door panel that can be opened and closed is provided at the front periphery of the first upper guide plate, and a second door panel that can be opened and closed is provided at the front periphery of the first lower guide plate.

[0018] In a preferred embodiment of this utility model, the water pump assembly includes:

[0019] A water guide bearing is installed between the upper guide vane housing and the lower guide vane housing;

[0020] The impeller located between the upper impeller housing and the lower impeller housing; and

[0021] A pump shaft is located between the upper transition section housing and the lower transition section housing. The front end of the pump shaft is connected to the motor assembly, and its rear end passes through the impeller and is connected to the water guide bearing.

[0022] In a preferred embodiment of the present invention, a water guide cone is provided between the upper guide vane housing and the lower guide vane housing, located on the rear side of the water guide bearing.

[0023] In a preferred embodiment of the present invention, a bearing coupling assembly for connecting the pump shaft and the output shaft of the motor assembly is provided between the upper gradient section housing and the lower gradient section housing.

[0024] In a preferred embodiment of this utility model, the bearing connection assembly includes:

[0025] The bearing housing is disposed between the upper transition section housing and the lower transition section housing, and the bearing housing includes an upper bearing housing and a lower bearing housing arranged in an enclosing manner.

[0026] A thrust radial combined bearing is installed in the bearing housing, one end of which is connected to the front end of the pump shaft, and the other end is connected to the output shaft of the motor assembly via a coupling;

[0027] A dynamic seal mounted on the pump shaft and located at the rear end of the bearing housing; and

[0028] A sealed expansion joint installed on the front end face of the bearing housing and connected to the motor assembly.

[0029] In a preferred embodiment of the present invention, a drain pipe is provided on the bottom of the bearing housing.

[0030] In a preferred embodiment of the present invention, a second upper guide plate is provided inside the upper motor housing, and a second upper guide channel communicating with the first upper guide channel is formed between the second upper guide plate and the upper motor housing; a second lower guide plate is provided inside the lower motor housing, and a second lower guide channel communicating with the first lower guide channel is formed between the second lower guide plate and the lower motor housing.

[0031] In a preferred embodiment of the present invention, a manhole is provided on each side of the lower motor housing.

[0032] In a preferred embodiment of the present invention, inlet and outlet water holes are provided on the front side of the second upper guide plate and / or the second lower guide plate.

[0033] In a preferred embodiment of this utility model, the motor assembly is a submersible motor.

[0034] In a preferred embodiment of this utility model, the novel split-type submersible axial flow pump further includes a lubricating oil cooling mechanism, which comprises:

[0035] The circulating oil tank is installed on the base;

[0036] A first oil pump and a second oil pump are mounted on the base. The inlet ends of the first and second oil pumps are connected to the circulating oil tank, and their outlet ends are connected to the inlet ends of the water-guided bearing and the thrust radial combined bearing via oil supply pipes.

[0037] An oil cooler is installed inside the motor housing. The oil inlet of the oil cooler is connected to the oil outlet of the water-guided bearing and the thrust radial combined bearing through an oil return pipe. The oil outlet of the oil cooler is connected to the circulating oil tank through a return pipe.

[0038] In a preferred embodiment of this utility model, a safety monitoring sensor is provided inside the water guide bearing, the thrust radial combined bearing and the motor assembly. Each safety monitoring sensor is connected to the junction box via a signal cable, and the motor assembly is connected to the junction box via a power cable.

[0039] In a preferred embodiment of this utility model, the inlet pre-embedded pipe is a combination of expansion joint and pre-embedded pipe, and the outlet pre-embedded pipe is connected to the rear end of the water pump housing through the expansion joint.

[0040] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: This utility model adopts a split structure for the water pump housing and the motor housing, which allows the water pump housing or the motor housing to be directly disassembled when maintenance is required, thus facilitating on-site maintenance and reducing maintenance costs. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0042] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0043] Figure 2 This is an exploded schematic diagram from one perspective of this utility model.

[0044] Figure 3This is an exploded schematic diagram from another perspective of this utility model.

[0045] Figure 4 This is a structural schematic diagram of the core component of the submersible axial flow pump of this utility model.

[0046] Figure 5 This is a schematic diagram of the arrangement of the lubricating oil system, drainage, cables, etc. of this utility model.

[0047] Figure 6 This is a schematic diagram of the water pump section structure of this utility model.

[0048] Figure 7 This is an exploded view of the water pump section structure of this utility model.

[0049] Figure 8 This is a schematic diagram of the motor section structure of this utility model.

[0050] Figure 9 This is an exploded view of the motor section structure of this utility model. Detailed Implementation

[0051] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0052] Referring to the attached figure, a novel split-type submersible axial flow pump is shown, including a base 100, a pump section structure 200, a motor section structure 300, an inlet pre-embedded pipe 400, and an outlet pre-embedded pipe 500.

[0053] The base 100 adopts a frame structure, which serves as the carrier for the submersible axial flow pump and has high structural strength.

[0054] The pump section structure 200 is mounted on the base 100. The pump section structure 200 includes a pump housing 210 and a pump assembly 220 installed inside the pump housing 210. The pump housing 210 adopts a split structure, which includes an upper pump housing 211 and a lower pump housing 212 arranged in an enclosing manner. The outer mating surfaces between the upper pump housing 211 and the lower pump housing 212 are precision machined and sealed with sealing strips to ensure that there is no water leakage after installation. The inner mating surfaces are only fixed and not sealed, allowing water to flow freely in and out.

[0055] The upper pump housing 211 includes an upper transition section housing 2111, an upper impeller housing 2112, and an upper guide vane housing 2113, all joined together along the water inlet direction. A first upper guide plate 2114 is disposed within the upper transition section housing 2111, and a first upper guide channel 2115 is formed between the first upper guide plate 2114 and the upper transition section housing 2111. The lower pump housing 212 includes a lower transition section housing 2121, a lower impeller housing 2122, and a lower guide vane housing 2123, all joined together along the water inlet direction. A first lower guide plate 2124 is disposed within the lower transition section housing 2121, and a first lower guide channel 2125 is formed between the first lower guide plate 2124 and the lower transition section housing 2121. The outer surfaces of the first upper guide plate 2114 and the first lower guide plate 2124 are smooth and streamlined, and their inner surfaces are provided with reinforcing ribs, which can ensure smooth water flow while ensuring the rigidity of the half shell and prevent deformation during disassembly and assembly.

[0056] A first, openable door plate 2116 is provided at the front periphery of the first upper guide plate 2114. An appropriate gap is left between the first door plate 2116 and the inner surface of the upper pump housing 211 to ensure water flow within the first upper guide plate 2114. When the first upper guide plate 2114 is open, installation and maintenance personnel can move between the upper pump housing 211 and the lower pump housing 212, facilitating the installation of the motor assembly, expansion joint, and bearing housing. Similarly, a second, openable door plate 2126 is provided at the front periphery of the first lower guide plate 2124. An appropriate gap is left between the second door plate 2126 and the inner surface of the lower pump housing 212 to ensure water flow within the first lower guide plate 2124. When the first lower guide plate 2124 is open, installation and maintenance personnel can move between the upper pump housing 211 and the lower pump housing 212, facilitating the installation of the motor assembly, expansion joint, and bearing housing.

[0057] The pump assembly 220 includes a water guide bearing 221, an impeller 222, and a pump shaft 223. The water guide bearing 221 is installed between the upper guide vane housing 2113 and the lower guide vane housing 2123, and the impeller 222 is located between the upper impeller housing 2112 and the lower impeller housing 2122. The pump shaft 223 is located between the upper transition section housing 2111 and the lower transition section housing 2121. The front end of the pump shaft 223 is connected to the motor assembly 320, and its rear end passes through the impeller 222 and is connected to the water guide bearing 221.

[0058] A water guide cone 224 is provided between the upper guide vane housing 2113 and the lower guide vane housing 2123, located behind the water guide bearing 221, to facilitate the outward guidance of water from the water pump housing 210.

[0059] A bearing coupling assembly 230 for connecting the pump shaft 223 to the output shaft of the motor assembly 320 is provided between the upper transition section housing 2111 and the lower transition section housing 2121. Specifically, the bearing coupling assembly 230 includes a bearing housing housing 231, a thrust radial combination bearing 232, a dynamic seal 233, and a sealing expansion joint 234.

[0060] The bearing housing 231 is positioned between the upper transition section housing 2111 and the lower transition section housing 2121. The bearing housing 231 includes an upper bearing housing 2311 and a lower bearing housing 2312 arranged in an enclosing manner, facilitating disassembly and maintenance. A drain pipe 2313 is provided at the bottom of the bearing housing 231, allowing any minor leakage to be discharged. The thrust radial combined bearing 232 is installed inside the bearing housing 231, with one end connected to the front end of the pump shaft 223 and the other end connected to the output shaft of the motor assembly 320 via a coupling 235. A dynamic seal 233 is installed on the pump shaft 223 and located at the rear end of the bearing housing 231, forming a dynamic seal between the pump shaft 223 and the bearing housing 231 to prevent water from entering the bearing housing 231. The sealing expansion joint 234 is installed on the front end face of the bearing housing 231 and connected to the outer housing surface of the motor assembly 320. This ensures that the pump shaft 223 and the output shaft of the motor assembly 320 are installed coaxially, while also ensuring a sealed connection between the bearing housing 231 and the motor assembly 320.

[0061] The motor segment structure 300 is mounted on the base 100. The motor segment structure 300 includes a motor housing 310 and a motor assembly 320 installed inside the motor housing 310 and connected to the water pump assembly 220. The rear end of the motor housing 310 is connected to the front end of the water pump housing 320. The motor assembly 320 is preferably a submersible motor. The motor housing 310 adopts a split structure, which includes an upper motor housing 311 and a lower motor housing 312 arranged in an enclosing manner. The outer mating surface between the upper motor housing 311 and the lower motor housing 312 is precision machined and sealed with a sealing strip to ensure that there is no water leakage after installation. The inner mating surface is only fixed and not sealed, allowing water to flow freely in and out.

[0062] A second upper guide plate 3111 is provided inside the upper motor housing 311, and a second upper guide channel 3112 communicating with the first upper guide channel 2115 is formed between the second upper guide plate 3111 and the upper motor housing 311. A second lower guide plate 3121 is provided inside the lower motor housing 312, and a second lower guide channel 3122 communicating with the first lower guide channel 2125 is formed between the second lower guide plate 3121 and the lower motor housing 312. The outer surfaces of the second upper guide plate 3111 and the second lower guide plate 3121 are smooth and streamlined, and their inner surfaces are provided with reinforcing ribs, which can ensure smooth water flow while ensuring the rigidity of the half-shell and preventing deformation during disassembly and assembly.

[0063] A manhole 3123 is provided on each side of the lower motor housing 312 to facilitate maintenance personnel to enter the interior for maintenance.

[0064] Water inlet and outlet holes 301 are provided on the front side of the second upper guide plate 3111 and / or the second lower guide plate 3121. They can form an internal water flow channel with the joint surface of the second upper guide plate 3111 or the second lower guide plate 3121 and the gap of the first door plate 2116 or the second door plate 2126 to ensure the cooling effect of the motor and the oil cooler.

[0065] The inlet end pre-embedded pipe 400 is connected to the front end of the motor housing 310. In this embodiment, the inlet end pre-embedded pipe 400 adopts an expansion joint as a pre-embedded pipe to facilitate the adjustment of the installation position of the submersible axial flow pump.

[0066] The outlet end pre-embedded pipe 500 is connected to the rear end of the water pump housing 210. In this embodiment, the outlet end pre-embedded pipe 500 is connected to the rear end of the water pump housing 210 through an expansion joint 510 to facilitate adjustment of the installation position of the submersible cross-flow pump.

[0067] The novel split-type submersible axial flow pump of this utility model also includes a lubricating oil cooling mechanism 600, which includes a circulating oil tank 610, a first oil pump 620a, a second oil pump 620b, and an oil cooler 630. The circulating oil tank 610 is mounted on the base 100 and contains a filter assembly for filtering the lubricating oil. The first oil pump 620a and the second oil pump 620b are mounted on the base 100, with their inlets connected to the circulating oil tank 610 and their outlets connected to the inlets of the water-guided bearing 221 and the thrust radial combined bearing 232 via an oil supply pipe 621. The oil cooler 630 is located inside the motor housing 310, with its cooling oil inlet connected to the outlets of the water-guided bearing 221 and the thrust radial combined bearing 232 via return oil pipes 631, and its cooling oil outlet connected to the circulating oil tank 610 via a return pipe 632. The water guide bearing 221 and the thrust radial combined bearing 232 are lubricated with thin oil, and the lubricating oil is cooled to ensure normal operation of the water guide bearing 221 and the thrust radial combined bearing 232 and extend their service life.

[0068] Safety monitoring sensors (not shown in the figure) are installed inside the water-guided bearing 221, the thrust-radial combined bearing 232, and the motor assembly 320. Each safety monitoring sensor is connected to the junction box 700 via a signal cable 710 to achieve real-time safety monitoring. The motor assembly 320 is connected to the junction box 700 via a power cable 720. The junction box 700 is mounted on the base 100.

[0069] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel split-type submersible axial flow pump, comprising: Base; The water pump section structure is disposed on the base, the water pump section structure includes a water pump housing and a water pump assembly installed in the water pump housing; The motor segment structure is mounted on the base. The motor segment structure includes a motor housing and a motor assembly installed inside the motor housing and connected to the water pump assembly. The rear end of the motor housing is connected to the front end of the water pump housing. A pre-embedded pipe at the water inlet end, wherein the pre-embedded pipe at the water inlet end is connected to the front end of the motor housing; and A pre-embedded pipe at the water outlet end is connected to the rear end of the water pump housing; characterized in that, The water pump housing adopts a split structure, which includes an upper water pump housing and a lower water pump housing arranged in an enclosing manner, and the upper water pump housing and the lower water pump housing are sealed together. The motor housing adopts a split structure, which includes an upper motor housing and a lower motor housing arranged in an enclosing manner, and the upper motor housing and the lower motor housing are sealed together.

2. The novel split-type submersible axial flow pump as described in claim 1, characterized in that, The upper pump housing includes an upper transition section housing, an upper impeller housing, and an upper guide vane housing spliced ​​together along the water inlet direction. A first upper guide plate is provided inside the upper transition section housing, and a first upper guide channel is formed between the first upper guide plate and the upper transition section housing. The lower pump housing includes a lower transition section housing, a lower impeller housing, and a lower guide vane housing spliced ​​together along the water inlet direction. A first lower guide plate is provided inside the lower transition section housing, and a first lower guide channel is formed between the first lower guide plate and the lower transition section housing.

3. The novel split-type submersible axial flow pump as described in claim 2, characterized in that, A first door panel that can be opened and closed is provided at the front periphery of the first upper guide plate, and a second door panel that can be opened and closed is provided at the front periphery of the first lower guide plate.

4. The novel split-type submersible axial flow pump as described in claim 3, characterized in that, The water pump assembly includes: A water guide bearing is installed between the upper guide vane housing and the lower guide vane housing; The impeller located between the upper impeller housing and the lower impeller housing; and A pump shaft is located between the upper transition section housing and the lower transition section housing. The front end of the pump shaft is connected to the motor assembly, and its rear end passes through the impeller and is connected to the water guide bearing.

5. The novel split-type submersible axial flow pump as described in claim 4, characterized in that, A water guide cone is provided between the upper guide vane housing and the lower guide vane housing, located behind the water guide bearing.

6. The novel split-type submersible axial flow pump as described in claim 5, characterized in that, A bearing coupling assembly for connecting the pump shaft to the output shaft of the motor assembly is provided between the upper gradient section housing and the lower gradient section housing.

7. The novel split-type submersible axial flow pump as described in claim 6, characterized in that, The bearing connection assembly includes: The bearing housing is disposed between the upper transition section housing and the lower transition section housing, and the bearing housing includes an upper bearing housing and a lower bearing housing arranged in an enclosing manner. A thrust radial combined bearing is installed in the bearing housing, one end of which is connected to the front end of the pump shaft, and the other end is connected to the output shaft of the motor assembly via a coupling; A dynamic seal mounted on the pump shaft and located at the rear end of the bearing housing; and A sealed expansion joint installed on the front end face of the bearing housing and connected to the motor assembly.

8. The novel split-type submersible axial flow pump as described in claim 7, characterized in that, A drain pipe is provided on the bottom of the bearing housing.

9. The novel split-type submersible axial flow pump as described in any one of claims 4 to 8, characterized in that, A second upper guide plate is provided inside the upper motor housing, and a second upper guide channel is formed between the second upper guide plate and the upper motor housing, which communicates with the first upper guide channel; a second lower guide plate is provided inside the lower motor housing, and a second lower guide channel is formed between the second lower guide plate and the lower motor housing, which communicates with the first lower guide channel.

10. The novel split-type submersible axial flow pump as described in claim 9, characterized in that, A manhole is provided on each side of the lower motor housing.

11. The novel split-type submersible axial flow pump as described in claim 9, characterized in that, Water inlet and outlet holes are provided on the front side of the second upper guide plate and / or the second lower guide plate.

12. The novel split-type submersible axial flow pump as described in claim 9, characterized in that, The motor assembly is a submersible motor.

13. The novel split-type submersible axial flow pump as described in claim 9, characterized in that, The novel split-type submersible axial flow pump also includes a lubricating oil cooling mechanism, which comprises: The circulating oil tank is installed on the base; A first oil pump and a second oil pump are mounted on the base. The inlet ends of the first and second oil pumps are connected to the circulating oil tank, and their outlet ends are connected to the inlet ends of the water-guided bearing and the thrust radial combined bearing via oil supply pipes. An oil cooler is installed inside the motor housing. The oil inlet of the oil cooler is connected to the oil outlet of the water-guided bearing and the thrust radial combined bearing through an oil return pipe. The oil outlet of the oil cooler is connected to the circulating oil tank through a return pipe.

14. The novel split-type submersible axial flow pump as described in claim 9, characterized in that, Safety monitoring sensors are installed inside the water-guided bearing, the thrust-radial combined bearing, and the motor assembly. Each safety monitoring sensor is connected to the junction box via a signal cable, and the motor assembly is connected to the junction box via a power cable.

15. The novel split-type submersible axial flow pump as described in claim 1, characterized in that, The inlet pipe is a combination of expansion joint and pipe, and the outlet pipe is connected to the rear end of the pump housing via an expansion joint.

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