Magnetic liquid coupling suspension mechanical pump with split end cover

Abstract

The utility model provides a kind of magnetic liquid coupling suspension mechanical pump with split end cap, it is characterized by, including: impeller assembly, end cap, shell and rotor assembly;The inner shell cavity is formed in the shell central area recess;The rotor assembly is installed in the inner shell cavity;The impeller assembly is connected with the rotor assembly;The end cap is including first split end cap and second split end cap formed along radial division, the first split end cap and the second split end cap are installed on the wheel shaft along radial direction.The utility model uses split end cap structure, so that it can realize the integrated forming of impeller assembly and rotor assembly, the structure avoids the structural interference problem caused by traditional end cap needing to be inserted from shaft end, so that impeller and rotor can be integrally inserted into shell interior for assembly, significantly reduce assembly complexity and requirement to machining precision.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical pump technology, and specifically relates to a magnetic fluid coupling suspension mechanical pump with a split end cap. Background Technology

[0002] Existing hydraulic-magnetic coupling suspended mechanical pumps have a critical structural component: the end cover. Since the diameters of both the impeller assembly and the rotor are larger than the diameter of the end cover's central hole, the impeller assembly and rotor cannot be integrally molded; otherwise, the end cover cannot be installed. The current solution involves machining the impeller assembly and rotor separately, then fitting the end cover into the impeller assembly's shaft, and finally inserting the impeller assembly into the rotor's inner hole for secure connection. This existing end cover design prevents the impeller assembly and rotor from being integrally molded, forcing them to be fixed using interference fits or other connection methods. Compared to the integrated rotor of traditional non-suspended pumps, this increases structural complexity, material costs, and adds an extra connection process. Furthermore, the connection efficiency is affected by machining accuracy, leading to yield issues and ultimately impacting cost and production capacity. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a magnetic fluid coupling suspension mechanical pump with a split end cap, so as to solve the problem that the existing end cap design makes it impossible to integrally form the impeller assembly and rotor, resulting in the impeller assembly and rotor being fixed by interference fit or other connection methods. Compared with the integral rotor of the traditional non-suspension pump, this increases the complexity of the structure, increases the material cost, and adds an extra connection process. Moreover, the connection efficiency is affected by the processing accuracy, resulting in a certain yield problem, which in turn affects the cost and production capacity.

[0004] To achieve the above objectives and other related objectives, this utility model proposes a magnetic fluid coupling suspension mechanical pump with a split end cap, comprising: an impeller assembly, an end cap, a housing, and a rotor assembly;

[0005] The central area of ​​the casing is recessed to form an inner shell cavity;

[0006] The rotor assembly is installed inside the inner shell cavity;

[0007] The impeller assembly is connected to the rotor assembly;

[0008] The end cap comprises a first split end cap and a second split end cap formed by radial division, and the first split end cap and the second split end cap are radially mounted on the wheel shaft of the impeller assembly.

[0009] In one embodiment of the present invention, the first split end cap and the second split end cap are provided with mutually cooperating fixing structures on their dividing surfaces, and the first split end cap and the second split end cap are fixedly connected by the fixing structures.

[0010] In one embodiment of the present invention, the fixing structure includes a plurality of protrusions and a plurality of corresponding grooves. The protrusions are formed on the dividing surface of the first split end cap, and the grooves are formed on the dividing surface of the second split end cap. The protrusions and the grooves are interference fit.

[0011] In one embodiment of the present invention, the fixing structure includes a plurality of buckles and a plurality of corresponding slots that are mutually engaged and fixed. The buckles are formed on the dividing surface of the first split end cap, and the slots are formed on the dividing surface of the second split end cap.

[0012] In one embodiment of the present invention, the first split end cap and the second split end cap are fixedly connected by adhesive.

[0013] In one embodiment of the present invention, a plurality of positioning posts and corresponding positioning holes are respectively provided on the dividing surfaces of the first split end cap and the second split end cap, and the positioning posts are inserted into the positioning holes to achieve assembly alignment.

[0014] In one embodiment of this utility model, the first split end cap and the second split end cap are respectively fixedly connected to the housing.

[0015] In one embodiment of this utility model, the first split end cap and the second split end cap are fixedly connected to the housing by interference fit, adhesive or bolts.

[0016] In one embodiment of the present invention, the first split end cap and the second split end cap are respectively provided with positioning protrusions, and the housing is provided with positioning grooves. The positioning protrusions are inserted into the positioning grooves for assembly positioning of the housing and the end caps.

[0017] In one embodiment of the present invention, a pump cover is further included, which is fixed to the top of the housing and clamps and fixes the first split end cover and the second split end cover with the housing.

[0018] This invention provides a magnetic-hydraulic coupled suspension mechanical pump with a split end cap. By optimizing the connection structure between the impeller assembly and the rotor assembly, as well as the overall design of the end cap, it solves the problems of complex structure, difficult assembly, high cost, and low yield in traditional magnetic-hydraulic coupled suspension pumps. Specifically, it has the following beneficial effects:

[0019] This invention facilitates the integrated molding of the impeller assembly and rotor assembly. By integrally machining the shaft core of the impeller assembly and the inner hole of the rotor assembly during manufacturing, it eliminates traditional connection methods such as interference fits and bushing installations, simplifying the structure, improving overall strength and reliability, and avoiding defective products caused by assembly errors. It employs a split end cap structure, with the end cap radially divided into a first split end cap and a second split end cap, which are respectively fitted onto the impeller shaft from both sides and spliced ​​together to form a complete end cap. This enables the integrated molding of the impeller assembly and rotor assembly. This structure avoids the structural interference problems caused by the traditional end cap requiring insertion from the shaft end, allowing the impeller and rotor to be integrally inserted into the housing for assembly, significantly reducing assembly complexity and the requirements for machining accuracy. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0021] Figure 1 This is a schematic diagram of the structure of a suspension pump in one embodiment of the present invention.

[0022] Figure 2 This is a cross-sectional schematic diagram of an integrally formed rotor in a suspension pump according to one embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the split end cap structure in one embodiment of the present invention.

[0024] Label Explanation:

[0025] 10. Impeller assembly; 20. End cover; 30. Casing; 40. Rotor assembly; 11. Shaft; 12. Impeller; 21. First split end cover; 22. Second split end cover; 50. Pump cover. Detailed Implementation

[0026] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0027] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0028] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0029] Please see Figures 1 to 3 As shown, this utility model provides a magnetically coupled suspended mechanical pump with a split end cap, solving the problem that existing end cap designs prevent the impeller assembly and rotor from being integrally formed. This results in the impeller assembly and rotor being fixed using interference fits or other connection methods, increasing structural complexity and material costs compared to the integrated rotor of traditional non-suspended pumps. Furthermore, it adds an extra connection process, and the connection efficiency is affected by processing precision, leading to yield issues and impacting cost and production capacity. Specifically, the magnetically coupled suspended mechanical pump includes: an impeller assembly 10, an end cap 20, a housing 30, and a rotor assembly 40. The impeller assembly 10 includes a shaft 11 and an impeller 12, with the impeller 12 fixedly connected to one end of the shaft 11. The housing 30 has an inwardly recessed central region forming an inner cavity to accommodate and support the rotor assembly 40. The rotor assembly 40 is installed in the inner cavity and achieves suspended operation through magnetically coupled coupling. The impeller assembly 10 is connected to the rotor assembly 40 and rotates synchronously with it, thereby realizing the liquid transport function.

[0030] Please see Figure 1 and Figure 2 As shown, in this embodiment, the impeller assembly 10 and the rotor assembly 40 adopt an integrated molding structure, that is, the inner hole portions of the impeller assembly 10 and the rotor assembly 40 are integrally machined during the manufacturing process, eliminating the need for subsequent connection through interference fits or other fixing methods. This integrated structure not only improves the overall structural strength but also simplifies the assembly process, increasing production efficiency and product yield.

[0031] Please see Figure 1 , Figure 2 and Figure 3As shown, it is understandable that traditional end caps are integral structures, which limits the integrated molding of the impeller assembly and the rotor. In this embodiment, the end cap 20 adopts a split structure formed by radial division, specifically including a first split end cap 21 and a second split end cap 22. The first split end cap 21 and the second split end cap 22 are respectively installed radially from both sides of the shaft onto the wheel shaft 11 of the impeller assembly 10, and are spliced ​​together to form a complete end cap structure after assembly. This split end cap design eliminates the need to insert the impeller assembly 10 into the inner hole of the rotor assembly 40 during assembly, and also eliminates the need to fit the end cap into the shaft core before installing the impeller assembly. Therefore, it avoids the problem of not being able to integrate the impeller assembly due to structural interference, allowing the impeller assembly 10 and the rotor assembly 40 to be integrated into one piece. It eliminates the shaft sleeve in the traditional structure. Compared with the traditional structure, this utility model can reduce the number of parts, avoid complex assembly processes, and significantly reduce the assembly defect rate caused by processing errors, thereby improving product consistency and yield. In other words, the structure of this utility model is simplified, significantly reducing the difficulty of assembly.

[0032] Please see Figure 1 , Figure 2 and Figure 3 As shown, during the assembly process, since the impeller assembly 10 and the rotor assembly 40 are integrally formed, they can be directly inserted into the housing 30. The two separate parts of the end cover 20 are then radially fitted onto the shaft from both sides, completing the end cover installation. Compared to the prior art, which requires first fitting the end cover onto the shaft core before assembling the impeller and rotor, this invention eliminates the connection process between the impeller and rotor, reducing assembly difficulty and machining accuracy requirements. It is understood that by designing the end cover as a radially separate structure, this invention allows the impeller assembly and rotor to be integrally formed, effectively solving the problems of complex structure, cumbersome assembly, high cost, and low yield caused by the end cover structure limitations in existing hydraulic-magnetic coupling suspension mechanical pumps. This invention has good application prospects and promotional value.

[0033] Please see Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, to ensure that the first split end cap 21 and the second split end cap 22 can be securely connected together and to guarantee their stability during use, the present invention provides mutually cooperating fixing structures on the dividing surfaces of the first split end cap 21 and the second split end cap 22. The first split end cap 21 and the second split end cap 22 are fixedly connected by the fixing structures. These fixing structures can take various forms to meet the needs of different application scenarios.

[0034] Please see Figure 1 , Figure 2 and Figure 3As shown, in this embodiment, the fixing structure includes multiple protrusions and multiple corresponding grooves. The protrusions are formed on the dividing surface of the first split end cap 21, and the grooves are formed on the dividing surface of the second split end cap 22. The two are connected by an interference fit. This structure not only enhances the connection strength but also improves the assembly accuracy and prevents relative displacement of the split end caps during operation.

[0035] In another embodiment, the fixing structure can also be configured as multiple buckles and multiple corresponding slots that are mutually engaged and fixed. The buckles are formed on the dividing surface of the first split end cap, and the slots are formed on the dividing surface of the second split end cap. During assembly, the two split end caps can be automatically engaged simply by aligning them together, thereby achieving rapid assembly.

[0036] In another embodiment, the first split end cap 21 and the second split end cap 22 can also be fixedly connected by adhesive. For example, a high-strength, corrosion-resistant industrial adhesive, such as epoxy resin or polyurethane adhesive, can be used. After applying the adhesive to the mating surfaces of the two split end caps, they are pressed radially and cured. To enhance the bonding effect, a rough texture or microporous structure can be provided on the mating surfaces to increase the bonding area and adhesion.

[0037] To further improve the assembly precision between the first split end cap 21 and the second split end cap 22, and to ensure that they can be quickly and accurately aligned and maintain a stable connection during the docking process, this invention also provides a positioning structure on the dividing surface of the first split end cap 21 and the second split end cap 22. The positioning structure includes multiple positioning posts and multiple corresponding positioning holes. The positioning posts are formed on the dividing surface of the first split end cap 21; the positioning holes are opened on the dividing surface of the second split end cap 22, and correspond one-to-one with the positions of the positioning posts. During assembly, the first split end cap 21 and the second split end cap 22 are radially docked, allowing the positioning posts to be inserted into the corresponding positioning holes, thereby achieving precise alignment and limiting of the two. This structure allows operators to complete the docking of the end caps without repeatedly adjusting the angle or position, improving assembly efficiency and preventing misalignment or poor contact of the fixing structure due to assembly offset, thus enhancing connection stability. It can also be used in conjunction with the aforementioned protrusion-groove, snap-fit, and adhesive fixing methods to jointly ensure the overall connection performance of the end caps. Preferably, the positioning post and the positioning hole adopt a clearance fit or a slight interference fit, which facilitates insertion and prevents loosening. In addition, a guide bevel or chamfer structure can be provided on the outer periphery of the positioning post according to actual needs to further improve the smoothness of assembly.

[0038] In some other embodiments, the first split end cap 21 and the second split end cap 22 may not be assembled into a single structure, but may be fixedly connected to the housing 30 respectively. The first split end cap 21 and the second split end cap 22 can be fixedly connected to the housing 30 in various ways, such as interference fit connection, adhesive connection, or bolt connection. For example, the outer edges of the first split end cap 21 and the second split end cap 22 are provided with flange structures with certain dimensional tolerances, and the flange structures are tightly fitted with the mounting holes on the housing 30 by interference fit. Alternatively, the first split end cap 21 and the second split end cap 22 are provided with a plurality of mounting holes; correspondingly, the housing 30 is also provided with matching threaded holes or through holes; the end caps are firmly fixed to the housing 30 by bolts or other fasteners.

[0039] Understandably, to ensure that the first split end cap 21 and the second split end cap 22 can be accurately installed into their predetermined positions on the housing 30, and to avoid poor sealing or structural loosening due to assembly deviations, this invention also provides a positioning structure between the end caps and the housing 30. Specifically, positioning protrusions are provided on the first split end cap 21 and the second split end cap 22; positioning grooves are provided at corresponding positions on the housing 30; during assembly, the positioning protrusions are inserted into the positioning grooves, thereby achieving rapid positioning and limiting between the end caps and the housing. This structure can improve assembly accuracy, prevent end cap misalignment, enhance connection stability, and prevent displacement during operation.

[0040] Please see Figure 1 , Figure 2 and Figure 3 As shown, this utility model also includes a pump cover 50, which is fixed to the top of the housing 30 and, together with the housing 30, clamps and fixes the first split end cover 21 and the second split end cover 22. Specifically, the pump cover 50 is fixedly installed on the top of the housing 30 by screws, clips, etc., and a clamping space is formed between the pump cover 50 and the housing 30 for pressing and fixing the upper area of ​​the end cover 20; this clamping structure can further enhance the overall stability of the end cover and prevent it from loosening or falling off during pump operation.

[0041] This invention proposes a magnetic fluid coupling suspension mechanical pump with a split end cap. By integrally machining the impeller assembly shaft core and the rotor assembly inner hole during manufacturing, it eliminates the need for traditional interference fits and bushing installations, simplifying the structure, improving overall strength and reliability, and avoiding defective products caused by assembly errors. The split end cap structure is radially divided into a first split end cap and a second split end cap, which are respectively fitted onto the impeller assembly shaft from both sides and spliced ​​together to form a complete end cap. This allows for the integrated molding of the impeller assembly and the rotor assembly. This structure avoids the structural interference problem caused by the traditional end cap needing to be inserted from the shaft end, allowing the impeller and rotor to be integrally inserted into the casing for assembly, significantly reducing assembly complexity and the requirements for machining accuracy.

[0042] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A magnetic fluid coupling suspension mechanical pump with a split-type end cap, characterized in that, include: Impeller assembly, end cover, housing and rotor assembly; The central area of ​​the casing is recessed to form an inner shell cavity; The rotor assembly is installed inside the inner shell cavity; The impeller assembly is connected to the rotor assembly; The end cap comprises a first split end cap and a second split end cap formed by radial division, and the first split end cap and the second split end cap are radially mounted on the wheel shaft of the impeller assembly.

2. The magnetic fluid coupling suspension mechanical pump with a split end cap according to claim 1, characterized in that, The first split end cap and the second split end cap are provided with mutually cooperating fixing structures on their dividing surfaces, and the first split end cap and the second split end cap are fixedly connected by the fixing structures.

3. The magnetic fluid coupling suspension mechanical pump with a split end cap according to claim 2, characterized in that, The fixing structure includes multiple protrusions and multiple corresponding grooves. The protrusions are formed on the dividing surface of the first split end cap, and the grooves are formed on the dividing surface of the second split end cap. The protrusions and the grooves are interference fit.

4. The magnetic fluid coupling suspension mechanical pump with a split end cap according to claim 2, characterized in that, The fixing structure includes multiple buckles and multiple corresponding slots that are mutually engaged and fixed. The buckles are formed on the dividing surface of the first split end cap, and the slots are formed on the dividing surface of the second split end cap.

5. The magnetic fluid coupling suspension mechanical pump with a split end cap according to claim 1, characterized in that, The first split end cap and the second split end cap are fixedly connected by adhesive.

6. The magnetic fluid coupling suspension mechanical pump with a split end cap according to claim 1, characterized in that, The first split end cap and the second split end cap are respectively provided with multiple positioning posts and corresponding positioning holes on their dividing surfaces. The positioning posts are inserted into the positioning holes to achieve assembly alignment.

7. The magnetic fluid coupling suspension mechanical pump with a split end cap according to claim 1, characterized in that, The first split end cap and the second split end cap are respectively fixedly connected to the housing.

8. The magnetic fluid coupling suspension mechanical pump with a split end cap according to claim 1, characterized in that, The first split end cap and the second split end cap are fixedly connected to the housing by interference fit, adhesive or bolts.

9. The magnetic fluid coupling suspension mechanical pump with a split end cap according to claim 8, characterized in that, The first split end cap and the second split end cap are respectively provided with positioning protrusions, and the housing is provided with positioning grooves. The positioning protrusions are inserted into the positioning grooves to position the housing and the end caps during assembly.

10. The magnetic fluid coupling suspension mechanical pump with a split end cap according to claim 1, characterized in that, It also includes a pump cover, which is fixed to the top of the housing and clamps the first split end cap and the second split end cap with the housing.

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