Container multi-stage pump combined by independent shaftless impeller modules
Through the combined structure of independent shaftless impeller modules, the axial force closed-loop balance is achieved using magnets and coils, which solves the problems of return and mechanical losses of traditional multi-stage pumps, improves pumping efficiency and flow or pressure output, and reduces production costs.
Patent Information
- Application Number
- CN202510883366.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-29
- Publication Date
- 2025-08-08
AI Technical Summary
Traditional multi-stage pumps have problems such as return and secondary flow, large mechanical losses, imbalance in axial force, limited shaft length deflection and complex maintenance of impeller series.
The independent shaftless impeller module combination structure is adopted. Each impeller module works in the receiving cavity of the main body, uses magnets and coils to achieve axial force closed-loop balance, and flexibly controls the rotation speed through the electronic control system. The impeller modules are arranged in parallel or in series.
It effectively avoids the demand for superposition of axial forces, improves pumping efficiency and flow or pressure output, reduces production costs, and meets the needs of diversified working conditions.
Smart Images
Figure CN120444252A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of centrifugal pumps, and in particular to a containerized multi-stage pump composed of independent shaftless impeller modules. Background Art
[0002] Traditional multistage pumps typically use a shaft to connect the impeller and drive unit. This is particularly true for low-flow, high-lift multistage pumps. The narrow flow path is prone to backflow and secondary flow, increasing hydraulic losses while also causing significant mechanical losses and axial force imbalance, requiring the design of a specialized balancing device. Furthermore, multistage pumps face challenges such as shaft deflection limiting the number of impeller stages required for pressurization and complex maintenance. Therefore, a new multistage pump design is urgently needed to address these issues. Summary of the Invention
[0003] The purpose of this application is to provide a containerized multi-stage pump composed of independent shaftless impeller modules to solve the problems in the prior art.
[0004] To achieve the above objectives, the present application provides the following technical solution: a containerized multi-stage pump composed of independent shaftless impeller modules, comprising: The main body 1 is composed of at least two half-shells connected together by fasteners 9. The main body 1 is formed with an assembly inlet flow channel 2, an assembly outlet flow channel 8 and a plurality of accommodating chambers 6. The plurality of accommodating chambers 6 are connected to the assembly inlet flow channel 2 and the assembly outlet flow channel 8 through intermediate flow channels 101. impeller modules 5, a plurality of which are provided corresponding to the accommodating chamber 6 and installed in the accommodating chamber 6, and are used to pump the target medium from the assembly inlet flow channel 2 to the assembly outlet flow channel 8; each impeller module 5 includes a pump body 503, a fluid flow channel 502, and an impeller 501 disposed between the pump body 503 and the fluid flow channel 502, with magnets 508 disposed at both axial ends of the impeller 501, and coils 507 disposed on the pump body 503 and the fluid flow channel 502 relative to the magnets 508; The fixing pin 3 is connected to the impeller module 5 and is used to lock the impeller module 5 in the corresponding accommodating cavity 6 of the main body 1 .
[0005] Optionally, several of the accommodating cavities 6 are connected in parallel with the assembly inlet flow channel 2 and the assembly outlet flow channel 8 through the intermediate flow channel 101, and the impeller module suction port 201 of each impeller module 5 is connected to the assembly inlet flow channel 2 through the corresponding intermediate flow channel 101; the impeller module discharge port 202 of each impeller module 5 is connected to the assembly outlet flow channel 8 through the corresponding intermediate flow channel 101.
[0006] Optionally, all of the accommodating cavities 6 are connected in series with the assembly inlet flow channel 2 and the assembly outlet flow channel 8 through the intermediate flow channel 101, and the impeller module suction port 201 of the latter impeller module 5 is connected with the impeller module discharge port 202 of the former impeller module 5 through the corresponding intermediate flow channel 101, wherein the impeller module suction port 201 of the former impeller module 5 is connected with the assembly inlet flow channel 2, and the impeller module discharge port 202 of the last impeller module 5 is connected with the assembly outlet flow channel 8.
[0007] Optionally, a ring platform 504 for sleeve-mounting a sealing ring 7 is provided at one end of the pump body 503 facing the suction port 2 , and the end face and outer circle of the sealing ring 7 abut against the corresponding end face of the accommodating cavity 6 .
[0008] Optionally, the impeller module 5 further includes a mouth ring 506 provided on the pump body 503 and the fluid 502 for slewing support of the impeller 501 .
[0009] Optionally, a flow channel 505 is provided on the pump body 503 to guide the target medium ejected by the impeller 501 to the flow medium 502 , and a guide vane 510 is provided on a side of the flow medium 502 away from the flow channel 505 .
[0010] Optionally, the coil 507 is further configured to interact with the magnet 508 to balance at least a portion of the axial force of the impeller 501 when it is operating.
[0011] Optionally, the magnet 508 and the coil 507 are both insulated and protected.
[0012] The beneficial technical effects of the present application are as follows: The present application provides a containerized multi-stage pump composed of independent shaftless impeller modules, which uses a main body as a platform and an impeller module assembled in a housing cavity on the main body. The axial force generated by each impeller is closed-loop balanced in its own impeller module, effectively avoiding the disadvantage that when all impellers are arranged in series on a main shaft in the prior art, the axial forces generated by all impellers are concentrated and superimposed on the main shaft, thus requiring the design of a special balancing device; at the same time, each impeller module is provided with a coil on the pump body and the fluid flow, and a magnet is provided on the impeller accordingly, so that the speed of each impeller module can be controlled by an electronic control system, thereby more flexibly controlling the output flow, pressure and other parameters of the containerized multi-stage pump while ensuring the pumping efficiency to meet diverse needs; in addition, different impeller modules can be flexibly adapted in the housing cavity according to the working conditions, which is conducive to standardization during the manufacture of the main body and effectively reduces production costs. The impeller modules are arranged and combined in parallel or in series to form a containerized multi-stage pump, which effectively improves the flow or pressure output. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1This is a schematic diagram of the parallel structure of a containerized multi-stage pump combined with independent shaftless impeller modules in this application; Figure 2 This is a schematic diagram of the serial structure of a containerized multi-stage pump combined with independent shaftless impeller modules in this application; Figure 3 This is a schematic diagram of the impeller module structure of this application; Figure 4 A schematic diagram of the main body of this application; In the figure: 1. Main body; 1a. Upper half shell; 1b. Lower half shell; 101. Intermediate flow channel; 2. Assembly inlet flow channel; 201. Impeller module suction port; 202. Impeller module discharge port; 3. Fixing pin; 4. Pin hole; 5. Impeller module; 501. Impeller; 502. Flow through fluid; 503. Pump body; 504. Ring platform; 505. Flow channel; 506. Mouth ring; 507. Coil; 508. Magnet; 509. Shaft; 510. Guide vane; 6. Accommodating chamber; 7. Sealing circle; 8. Assembly outlet flow channel; 9. Fastener. DETAILED DESCRIPTION
[0014] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0015] See also Figures 1 to 4 , a containerized multi-stage pump with an independent shaftless impeller module combination, comprising: a main body 1, an impeller module 5, and a fixing pin 3; wherein: The main body 1 is composed of at least two half-split shells connected together by fasteners 9. An assembly inlet flow channel 2, an assembly outlet flow channel 8 and a plurality of accommodating chambers 6 are formed in the main body 1. The plurality of accommodating chambers 6 are connected to the assembly inlet flow channel 2 and the assembly outlet flow channel 8 through the intermediate flow channel 101. Here, it can be understood that the assembly inlet flow channel 2, the assembly outlet flow channel 8 and the accommodating cavity 6 are all open structures formed on the two half-split shells by pairing with the joint surface of the two half-split shells as the symmetrical surface. After the two half-split shells are connected as a whole by the fastener 9, a complete assembly inlet flow channel 2, the assembly outlet flow channel 8 and the accommodating cavity 6 are formed. In this embodiment, the cross-sections of the assembly inlet flow channel 2, the assembly outlet flow channel 8 and the accommodating cavity 6 are all circular; in this embodiment, the fastener 9 is a combination of a double-headed screw and a matching nut and a locking washer. Correspondingly, a light hole and a threaded hole are respectively provided on the two half-split shells. One end of the double-headed screw passes through the light hole provided on one half of the split shell and is screwed into the threaded hole provided on the other half of the split shell, and an anti-loosening washer is installed on the threaded end exposed outside the light hole and the nut is screwed in, thereby connecting the two half-split shells as a whole. Several impeller modules 5 are provided corresponding to the accommodating chamber 6 and installed in the accommodating chamber 6. The impeller modules 5 are used to pump the target medium from the assembly inlet flow channel 2 to the assembly outlet flow channel 8. Each impeller module 5 includes a pump body 503, a flow passage 502, and an impeller 501 disposed between the pump body 503 and the flow passage 502. Magnets 508 are provided at both axial ends of the impeller 501. Coils 507 are provided on the pump body 503 and the flow passage 502 relative to the magnets 508. The fixing pin 3 is connected to the impeller module 5 and is used to lock the impeller module 5 in the corresponding accommodating cavity 6 of the main body 1. In this embodiment, the fixing pin 3 is installed in the pin hole 4 provided on the outer wall of the pump body 503, and the housing (i.e. Figure 4 As shown in the figure, the joint surfaces of the upper half-split shell 1a and the lower half-split shell 1b are respectively provided with semi-counterfeit holes adapted to the fixing pin 3. When the impeller module 5 is installed in the accommodating cavity 6 of the lower half-split shell 1b, the part of the fixing pin 3 exposed from the outer wall of the pump body 503 is accommodated in the corresponding semi-counterfeit hole on the lower half-split shell 1b. After the two half-split shells are connected as a whole by fasteners 9 to form the main body 1, the two half-counterfeit holes are combined into a circular hole, thereby completing the pressing and fixing of the fixing pin 3, and then locking the impeller module 5 in the corresponding accommodating cavity 6 of the main body 1.
[0016] According to the above structure provided in this embodiment, the containerized multi-stage pump of the independent shaftless impeller module combination provided in this embodiment adopts the main body 1 as the platform, and the impeller module 5 is assembled in the accommodating chamber 6 on the main body 1. The axial force generated by the operation of each impeller 501 is closed-loop balanced in its own impeller module 5, effectively avoiding the disadvantage of the prior art that when all impellers are arranged in series on a main shaft, the axial forces generated by all impellers are concentrated and superimposed on the main shaft, thereby requiring the design of a special balancing device; at the same time, each impeller module 5 is provided with a coil 507 on the pump body 503 and the fluid flow 502, and a magnet 508 is correspondingly provided on the impeller 501, so that the speed of each impeller module 5 can be controlled by the electronic control system, thereby ensuring the pumping efficiency. On the basis of more flexible control of the output flow, pressure and other parameters of the containerized multi-stage pump to meet diverse needs; in addition, different impeller modules 5 can be flexibly adapted in the accommodating chamber according to the working conditions and tasks, which is conducive to standardization during the manufacture of the main body 1 and effectively reduces production costs. Multiple impeller modules 5 are arranged and combined in parallel or in series to form a containerized multi-stage pump, which effectively increases the flow rate or pressure output.
[0017] In another embodiment of this application, please refer to Figure 1, several accommodating chambers 6 are connected in parallel with the assembly inlet flow channel 2 and the assembly outlet flow channel 8 through the intermediate flow channel 101, and the impeller module suction port 201 of each impeller module 5 is connected to the assembly inlet flow channel 2 through the corresponding intermediate flow channel 101; the impeller module discharge port 202 of each impeller module 5 is connected to the assembly outlet flow channel 8 through the corresponding intermediate flow channel 101. In this way, a larger flow rate can be obtained under the same power.
[0018] In another embodiment of this application, please refer to Figure 2 All the accommodating cavities 6 are connected in series with the assembly inlet flow channel 2 and the assembly outlet flow channel 8 through the intermediate flow channel 101. The impeller module suction port 201 of the rear impeller module 5 is connected with the impeller module discharge port 202 of the front impeller module 5 through the corresponding intermediate flow channel 101. Among them, the impeller module suction port 201 of the front impeller module 5 is connected with the assembly inlet flow channel 2, and the impeller module discharge port 202 of the last impeller module 5 is connected with the assembly outlet flow channel 8. In this way, higher discharge pressure and higher head can be obtained under the same power.
[0019] In another embodiment of this application, please refer to Figure 1 and Figure 2 The end of the pump body 503 facing the suction port 2 is provided with a ring platform 504 for mounting a sealing ring 7. The end face and outer circle of the sealing ring 7 abut against the corresponding end face of the accommodating cavity 6. In this way, the target medium can be effectively prevented from leaking from the high-pressure area back to the low-pressure area, thereby ensuring the pumping efficiency.
[0020] In another embodiment of this application, please refer to Figure 1 and Figure 2 The impeller module 5 also includes a mouth ring 506 provided on the pump body 503 and the fluid flow 502 for slewing support of the impeller 501. In this embodiment, the impeller 501 has shafts 509 extending from both ends of its own axis to rotate with the mouth ring 506. In this way, the modular structure of the impeller module 5 can be fully realized to ensure the smooth rotation of the impeller 501. Among them, the structure of the mouth ring 506 and its installation and fixing method on the pump body 503 and the fluid flow 502 can adopt existing technology, and the pump body 503 and the fluid flow 502 are connected by fasteners.
[0021] In another embodiment of this application, please refer to Figure 1 and Figure 2 A flow channel 505 is provided on the pump body 503 for guiding the target medium thrown out by the impeller 501 to the flow channel 502. A guide vane 510 is provided on the side of the flow channel 502 away from the flow channel 505. The guide vane 510 guides the target medium thrown out by the impeller 501 so that the target medium is introduced into the subsequent intermediate flow channel 101 according to the set flow direction.
[0022] In another embodiment of this application, please refer to Figure 1 and Figure 2 The coil 507 is also used to interact with the magnet 508 to balance at least part of the axial force of the impeller 501 when it is working. In this way, it can effectively bear part of the axial force generated when the impeller 501 is working, thereby reducing the wear pressure of the impeller 501 on the ring 506 and significantly improving the service life of the impeller module 5.
[0023] In another embodiment of this application, please refer to Figures 1 to 4 The magnet 508 and the coil 507 are both insulated and protected. Here, the insulation protection can be processed by existing technology, so that the service life of the impeller module 5 can be significantly improved.
[0024] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.
[0025] In the description of this application, it should be understood that the terms "up", "down", "left", "right", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this 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 cannot be understood as a limitation on this application.
[0026] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.
[0027] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A containerized multi-stage pump composed of independent shaftless impeller modules, characterized in that: include: A main body (1) is composed of at least two half-split shells connected together by a fastener (9), wherein an assembly inlet flow channel (2), an assembly outlet flow channel (8) and a plurality of accommodating chambers (6) are formed in the main body (1), and the plurality of accommodating chambers (6) are connected to the assembly inlet flow channel (2) and the assembly outlet flow channel (8) through an intermediate flow channel (101); impeller modules (5), a plurality of which are provided corresponding to the accommodating chamber (6) and installed in the accommodating chamber (6), the impeller modules (5) being used to pump the target medium from the assembly inlet flow channel (2) to the assembly outlet flow channel (8); each impeller module (5) comprises a pump body (503), a fluid (502), and an impeller (501) provided between the pump body (503) and the fluid (502); magnets (508) are provided at both axial ends of the impeller (501); and coils (507) are provided on the pump body (503) and the fluid (502) relative to the magnets (508); A fixing pin (3) is connected to the impeller module (5) and is used to lock the impeller module (5) in the corresponding accommodating cavity (6) of the main body (1).
2. The containerized multi-stage pump with independent shaftless impeller modules according to claim 1 is characterized in that: The plurality of accommodating chambers (6) are connected in parallel with the assembly inlet flow channel (2) and the assembly outlet flow channel (8) through the intermediate flow channel (101); the impeller module suction port (201) of each impeller module (5) is connected to the assembly inlet flow channel (2) through the corresponding intermediate flow channel (101); and the impeller module discharge port (202) of each impeller module (5) is connected to the assembly outlet flow channel (8) through the corresponding intermediate flow channel (101).
3. The containerized multi-stage pump with independent shaftless impeller modules according to claim 1 is characterized in that: All of the accommodating chambers (6) are connected in series with the assembly inlet flow channel (2) and the assembly outlet flow channel (8) through the intermediate flow channel (101), and the impeller module suction port (201) of the latter impeller module (5) is communicated with the impeller module discharge port (202) of the previous impeller module (5) through the corresponding intermediate flow channel (101), wherein the impeller module suction port (201) of the first impeller module (5) is communicated with the assembly inlet flow channel (2), and the impeller module discharge port (202) of the last impeller module (5) is communicated with the assembly outlet flow channel (8).
4. The containerized multi-stage pump with independent shaftless impeller modules according to claim 1 is characterized in that: An annular platform (504) for sleeve-mounting a sealing ring (7) is provided at one end of the pump body (503) facing the suction port (2), and the end face and outer circle of the sealing ring (7) abut against the corresponding end face of the accommodating cavity (6).
5. The containerized multi-stage pump with independent shaftless impeller modules according to claim 4 is characterized in that: The impeller module (5) further comprises a mouth ring (506) provided on the pump body (503) and the fluid (502) for slewing support of the impeller (501).
6. The containerized multi-stage pump with independent shaftless impeller modules according to claim 5 is characterized in that: The pump body (503) is provided with a flow passage (505) for guiding the target medium ejected by the impeller (501) to the flow passage (502), and a guide vane (510) is provided on a side of the flow passage (502) away from the flow passage (505).
7. The containerized multi-stage pump with independent shaftless impeller modules according to claim 1 is characterized in that: The coil (507) is also used to interact with the magnet (508) to balance at least a portion of the axial force when the impeller (501) is working.
8. The containerized multi-stage pump with independent shaftless impeller modules according to claim 1 is characterized in that: The magnet (508) and the coil (507) are both insulated and protected.