Rotor structure, canned pump and equipment

Abstract

This application discloses a rotor structure, a shielded pump, and equipment, relating to the field of electrical technology. The rotor structure includes a rotating shaft, a waterproof iron core, and a first stop structure. The waterproof iron core includes a waterproof structure and an iron core assembly; the waterproof structure has a waterproof through hole and a waterproof cavity, the rotating shaft passes through the waterproof through hole, and the waterproof cavity surrounds the outer periphery of the waterproof through hole. The iron core assembly includes an iron core body and a magnetic tile, the iron core body has a central through hole, and the magnetic tile surrounds and adheres to the outer surface of the iron core body. The iron core assembly is fixed within the waterproof cavity; the first stop structure is disposed between the rotating shaft and the waterproof iron core to prevent relative rotation between the rotating shaft and the waterproof iron core. This application not only prevents relative rotation between the rotating shaft and the waterproof iron core, but also, by fixing the iron core assembly within the waterproof cavity provided on the waterproof structure, achieves the purpose of waterproofing and rust prevention for the iron core assembly.

Description

Technical Field

[0001] This application relates to the field of electrical technology, and more specifically, to a rotor structure, a canned pump, and equipment. Background Technology

[0002] In heating systems such as underfloor heating and heat pumps, shielded circulating pumps are typically used to promote water circulation within the flow channel. The rotor assembly connected to the impeller is immersed in hot water, which can reach temperatures as high as 95°C. Therefore, the rotor assembly must be rust-proof and heat-resistant.

[0003] Currently, there are two common rotor structures. One involves enclosing the iron core and magnetic powder in a stainless steel shielding sleeve to isolate the iron core from water. This method requires a completely sealed shielding sleeve and compacted magnetic powder, making it difficult to manufacture. The other method involves integrating a ring-shaped permanent magnet with the shaft via injection molding. This structure is simple to manufacture, but because the shaft and iron core are directly coupled in the traditional way, relative rotation can easily occur between the shaft and iron core during operation, making it difficult to guarantee the rotor's structural strength. Furthermore, the performance of the ring-shaped permanent magnet is relatively poor, failing to meet the requirements for high-efficiency canned motor pumps. Summary of the Invention

[0004] The main objective of this application is to provide a rotor structure, a canned pump, and equipment to at least solve the problem of relative rotation between the rotor shaft and the iron core in the prior art.

[0005] According to one aspect of the embodiments of this application, a rotor structure is provided, comprising:

[0006] Shaft;

[0007] A waterproof iron core, comprising a waterproof structure and an iron core assembly; the waterproof structure is provided with a waterproof through hole and a waterproof cavity, the rotating shaft passes through the waterproof through hole, the waterproof cavity is arranged around the outer periphery of the waterproof through hole, the iron core assembly comprises an iron core body and a magnetic tile, the iron core body is provided with a central through hole, the magnetic tile surrounds and adheres to the outer surface of the iron core body, and the iron core assembly is fixed in the waterproof cavity;

[0008] A first stop structure is disposed between the rotating shaft and the waterproof iron core to prevent relative rotation between the rotating shaft and the waterproof iron core.

[0009] Furthermore, the first stop structure includes:

[0010] The first stop protrusion is disposed on one of the inner wall surface of the waterproof through hole and the outer surface of the rotating shaft;

[0011] The first stop groove is adapted to the first stop protrusion. The first stop groove is disposed on the other side of the inner wall surface of the waterproof through hole and the outer surface of the rotating shaft, so as to lock the waterproof iron core at a first predetermined position on the rotating shaft.

[0012] Furthermore, it also includes:

[0013] The second stop structure is disposed between the iron core body and the waterproof structure to prevent the iron core body from shifting.

[0014] Furthermore, the second stop structure includes:

[0015] The second stop protrusion is disposed on one of the iron core body and the waterproof structure;

[0016] The second stop groove is adapted to the second stop protrusion; the second stop groove is disposed on the other side of the iron core body and the waterproof structure to lock the iron core body at a second predetermined position on the outer surface of the waterproof through hole.

[0017] Furthermore, the first stop structure has multiple sets, and one or more sets of the first stop structure are respectively provided at opposite ends of the second stop structure.

[0018] Furthermore, there are multiple first stop protrusions and multiple first stop grooves; the multiple first stop protrusions are evenly arranged circumferentially along the inner wall surface of the waterproof through hole, and the first stop grooves are arranged in a one-to-one correspondence with the first stop protrusions and are located on the outer surface of the rotating shaft.

[0019] Furthermore, there are multiple second stop protrusions and multiple second stop grooves; the multiple second stop protrusions are evenly arranged circumferentially along the inner wall surface of the central through hole of the iron core body, and the second stop grooves are arranged one-to-one with the second stop protrusions and are located on the bottom surface of the waterproof cavity on the waterproof structure.

[0020] Furthermore, the waterproof structure includes:

[0021] A molding compound, wherein the waterproof through-hole is located in the middle of the molding compound;

[0022] A first plastic-sealed end cap is located at one end of the outer surface of the waterproof through hole;

[0023] A second plastic-sealed end cap is located at the other end of the outer surface of the waterproof through hole;

[0024] A fixed sealing cap is located between the first plastic sealing end cap and the second plastic sealing end cap, and is used to cover and seal the magnetic tile on the outer surface of the iron core body. The first plastic sealing end cap, the second plastic sealing end cap (213) and the fixed sealing cap are arranged on the outer surface of the waterproof through hole to form the waterproof cavity.

[0025] Furthermore, it also includes:

[0026] A shielding cover is fitted over the outer surface of the waterproof iron core.

[0027] Furthermore, the first plastic-sealed end cap has a first locking part at the end away from the waterproof through hole, and the second plastic-sealed end cap has a second locking part at the end away from the waterproof through hole. The first locking part and the second locking part lock and limit the shielding cover between the first plastic-sealed end cap and the second plastic-sealed end cap, and cover the outer surface of the waterproof iron core.

[0028] Furthermore, an annular connecting groove is provided on the outer side of either the first plastic-sealed end cap or the second plastic-sealed end cap, and the shielding cover includes:

[0029] A shielding cylinder, wherein the shielding cylinder has a circular cylindrical structure;

[0030] The first fastening structure is fixed to the first opening end of the shielding cylinder. The first fastening structure includes an end cap and an annular connecting protrusion adapted to the annular connecting groove. The end cap has a connecting hole adapted to the rotating shaft in the middle. The annular connecting protrusion is fixed to one end of the end cap facing the second opening end of the shielding cylinder.

[0031] The second fastening structure is fixed to the second open end of the shielding cylinder. The second fastening structure is an annular waterproof cover, which is used to fit around the other side of the first plastic-sealed end cap and the second plastic-sealed end cap.

[0032] Furthermore, the waterproof structure is also provided with an axial positioning hole, and the end face of the iron core body located in the axial direction is exposed at the axial positioning hole; the rotor structure also includes:

[0033] A rust-proof cover is fixed to the exposed end face of the iron core body at the axial positioning hole to prevent liquid from entering and contacting the iron core body from the axial positioning hole.

[0034] Furthermore, the waterproof structure is also provided with an axial positioning hole, and the end face of the iron core body located in the axial direction is exposed at the axial positioning hole; the rotor structure also includes:

[0035] A plug is provided, which is adapted to the axial positioning hole. The plug is inserted into the axial positioning hole and is interference-fitted with the axial positioning hole to prevent liquid from entering from the axial positioning hole and contacting the iron core body.

[0036] According to another aspect of the embodiments of this application, a shielded pump is also provided, the shielded pump including the rotor structure described above.

[0037] According to another aspect of the embodiments of this application, an apparatus is also provided, the apparatus including the aforementioned shielded pump.

[0038] Compared with the prior art, the technical solution of this application has at least the following technical effects:

[0039] This embodiment of the application, by setting a first stop structure between the rotating shaft and the waterproof iron core, not only prevents relative rotation between the rotating shaft and the waterproof iron core, but also fixes the iron core assembly in the waterproof cavity set on the waterproof structure, thereby achieving the purpose of waterproofing and rust prevention of the iron core assembly. The iron core body is equipped with magnetic tiles, which ensures the rotor performance while reducing the processing difficulty. Attached Figure Description

[0040] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0041] Figure 1 This is a cross-sectional view of a rotor structure provided in an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of the specific structure of the rotor shaft and core assembly in a rotor structure provided in an embodiment of the present invention;

[0043] Figure 3 This is a three-dimensional structural diagram of a rotor structure provided in an embodiment of the present invention;

[0044] Figure 4 for Figure 1 A partial structural diagram of the waterproof structure;

[0045] Figure 5 This is a schematic diagram of the rotor structure without the shielding cover provided in another embodiment of the present invention;

[0046] Figure 6 An exploded view of a rotor structure provided in another embodiment of the present invention;

[0047] Figure 7 This is a schematic diagram of a waterproof structure provided in an embodiment of the present invention;

[0048] Figure 8 A cross-sectional view of a rotor structure provided in another embodiment of the present invention;

[0049] Figure 9 for Figure 5 A cross-sectional view of the rotor structure showing the specific structure of the shaft and core assembly.

[0050] Figure 10 This is a schematic diagram of the assembly of the shielding cover, the rotating shaft, and the waterproof iron core in a rotor structure provided in another embodiment of the present invention;

[0051] Figure 11 A schematic diagram of one end face of a waterproof iron core equipped with a rotating shaft;

[0052] Figure 12 This is a schematic diagram of the specific structure of the rotating shaft and iron core assembly provided in another embodiment of the present invention.

[0053] The above figures include the following reference numerals:

[0054] 10. Shaft; 20. Waterproof iron core; 21. Waterproof structure; 211. Plastic seal; 111. Waterproof through hole; 112. Axial positioning hole; 113. Positioning hole A; 114. Positioning hole B; 115. Positioning hole C; 117. Anti-wear protrusion; 118. Positioning groove A; 119. Water passage hole; 212. First plastic seal end cap; 121. First boss; 213. Second plastic seal end cap; 131. Second boss; 132. Third boss; 123. Fixed sealing cover; 124. Annular connecting groove; 214. Shielding cover; 141 142. Shielding cylinder; 421. First fastening structure; 422. End cap; 423. Annular connecting protrusion; 424. Connecting hole; 145. Annular waterproof cover; 216. Waterproof cavity; 22. Iron core body; 221. Central through hole; 222. Positioning protrusion; 223. Through hole; 23. Magnet tile; 30. First stop structure; 31. First stop protrusion; 32. First stop groove; 41. Second stop protrusion; 411. Boss A; 42. Second stop groove; 50. Rust-proof cover; 51. Hook; 52. Positioning post; 60. Plug. Detailed Implementation

[0055] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0056] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0057] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0058] The first embodiment of the present invention provides a rotor structure, please refer to [link / reference]. Figure 1 The rotor structure includes a rotating shaft 10, a waterproof iron core 20, and a first stop structure 30. The waterproof iron core 20 includes a waterproof structure 21 and an iron core assembly. The waterproof structure 21 has a waterproof through hole 111 and a waterproof cavity 215. The rotating shaft 10 passes through the waterproof through hole 111, and the waterproof cavity 215 surrounds the outer periphery of the waterproof through hole 111. The iron core assembly includes an iron core body 22 and magnetic tiles 23. The iron core body 22 has a central through hole 221, and the magnetic tiles 23 surround and adhere to the outer surface of the iron core body 22. The iron core assembly is fixed within the waterproof cavity 215. The first stop structure 30 is disposed between the rotating shaft 10 and the waterproof iron core 20 to prevent relative rotation between them.

[0059] In this embodiment of the invention, by setting a first stop structure 30 between the rotating shaft 10 and the waterproof iron core 20, not only is relative rotation between the rotating shaft 10 and the waterproof iron core 20 prevented, but the iron core assembly is also fixed in the waterproof cavity 215 set on the waterproof structure 21, thus achieving the purpose of waterproofing and rust prevention for the iron core assembly. The iron core body 22 is provided with magnetic tiles 23. Compared with magnetic rings and magnetic powder, the use of magnetic tiles 23 on the iron core body 22 can not only ensure the rotor performance and meet the requirements of high-efficiency shielded pumps, but also reduce the processing difficulty of the entire rotor structure.

[0060] The first stop structure 30 provided in this embodiment of the invention includes a first stop protrusion 31 and a first stop groove 32. The first stop protrusion 31 is disposed on one of the inner wall surface of the waterproof through hole 111 and the outer surface of the rotating shaft 10. The first stop groove 32 is adapted to the first stop protrusion 31 and is disposed on the other of the inner wall surface of the waterproof through hole 111 and the outer surface of the rotating shaft 10, so as to lock the waterproof iron core 20 at a first predetermined position on the rotating shaft 10. Specifically, as shown... Figure 1 As shown, in this embodiment of the invention, the first stop protrusion 31 is a protrusion structure on the inner wall surface of the waterproof through hole 111, and the first stop groove 32 is disposed on the outer surface of the rotating shaft 10. The first stop groove 32 is as follows: Figure 2 The structure shown is a concave-flat structure. The first stop protrusion 31 and the first stop groove 32 cooperate to increase the bonding force between the rotating shaft 10 and the waterproof iron core, prevent relative rotation between the rotating shaft 10 and the waterproof iron core 20, and meet the usage requirements of the high-efficiency shielded pump.

[0061] In this embodiment of the invention, to further improve the mechanical strength of the rotor structure, the rotor structure also includes a second stop structure. The second stop structure is disposed between the iron core body 22 and the waterproof structure 21 to prevent the iron core body 22 from shifting. The second stop structure includes a second stop protrusion 41 and a second stop groove 42. The second stop protrusion 41 is disposed on one of the iron core body 22 and the waterproof structure 21. The second stop groove 42 is adapted to the second stop protrusion 41 and is disposed on the other of the iron core body 22 and the waterproof structure 21 to lock the iron core body 22 at a second predetermined position on the outer surface of the waterproof through hole 111. Specifically, as shown... Figure 2 , Figure 5 , Figure 6 As shown, the second stop protrusion 41 is disposed on the inner wall surface of the central through hole 221 on the iron core body 22, and the second stop groove 42 is disposed on the bottom surface of the waterproof cavity 215. When the iron core body 22 is fixed in the waterproof cavity 215, the second stop protrusion 41 is inserted into the second stop groove 42. The two fit together, increasing the bonding force between the iron core body 22 and the waterproof structure, preventing the iron core body 22 from moving within the waterproof cavity 215, and improving the structural strength and performance stability of the entire waterproof iron core. Specifically, the second stop protrusion 41 can be as follows: Figure 2 The petal-shaped protrusions arranged circumferentially along the inner wall of the central through hole 221, as shown, cooperate with the second stop groove 42 to increase the bonding force between the iron core body 22 and the waterproof structure 21, preventing the iron core body 22 from shifting within the waterproof structure 21. The second stop groove 42 can be a through groove extending from the outer surface of the waterproof through hole 111 to the inner surface of the waterproof through hole 111. In this case, the second stop protrusion 41 can also be as follows: Figure 6The positioning tooth structure shown has positioning teeth set on the inner wall surface of the central through hole 221. The positioning teeth are embedded in the second stop groove 42 and extend to the outer surface of the rotating shaft 10, which further enhances the bonding force between the iron core body 22 and the waterproof structure 21.

[0062] In this embodiment of the invention, the first stop structure 30 has multiple sets, and one or more sets of the first stop structure 30 are respectively provided at opposite ends of the second stop structure. When the second stop protrusion 41 is as follows... Figure 6 When the positioning tooth structure is shown, multiple concave-flat first stop grooves 32 are machined on the outer surface of the rotating shaft 10. The first stop grooves 32 are located at the opposite ends of the positioning teeth on the inner wall surface of the central through hole 221 of the iron core body 22 (that is, one or more sets of first stop structures 30 are respectively provided at the opposite ends of the second stop structure), which further enhances the bonding force between the rotating shaft 10 and the waterproof iron core 20, and prevents the rotating shaft 10 and the waterproof iron core 20 from rotating relative to each other. At the same time, the iron core body 22 will not move within the waterproof structure 21, thus ensuring the overall strength of the rotor structure.

[0063] In this embodiment of the invention, there are multiple first stop protrusions 31 and multiple first stop grooves 32. The multiple first stop protrusions 31 are evenly arranged circumferentially along the inner wall surface of the waterproof through hole 111. The first stop grooves 32 are arranged one-to-one with the first stop protrusions 31 and are located on the outer surface of the rotating shaft 10. As a result, the bonding force between the rotating shaft 10 and the waterproof iron core 20 is stronger to prevent relative rotation.

[0064] In this embodiment of the invention, there are multiple second stop protrusions 41 and multiple second stop grooves 42. The multiple second stop protrusions 41 are evenly arranged circumferentially along the inner wall of the central through hole 221 on the iron core body 22. The second stop grooves 42 are correspondingly arranged with the second stop protrusions 41 and are located on the bottom surface of the waterproof cavity 215 (the bottom surface of the waterproof cavity 215 is the outer surface of the plastic sealant 211). Figure 6 Two petal-shaped protrusions are evenly arranged circumferentially along the inner wall of the central through hole 221, and a second stop groove 42 is provided on the outer surface of the waterproof through hole 111 (as shown). Figure 7 (As shown). The specific structure of the second stop protrusion 41 is also as follows: Figure 9 The diagram shows multiple positioning teeth evenly arranged circumferentially along the inner wall of the central through hole 221. This strengthens the bonding force, preventing the iron core body 22 from shifting within the waterproof structure 21.

[0065] In this embodiment of the invention, the waterproof structure 21 includes a plastic sealant 211, a first plastic sealant end cap 212, a second plastic sealant end cap 213, and a fixed sealing cap 123. The waterproof through-hole 111 is located in the middle of the plastic sealant 211, meaning the plastic sealant 211 is a hollow cylindrical plastic structure. The first plastic sealant end cap 212 is located at one end of the outer surface of the waterproof through-hole 111. The first plastic sealant end cap 212 has a disc-shaped structure and is used to cover and seal one end of the iron core body 22 and the magnetic tile 23. The second plastic sealant end cap 213 is located at the other end of the outer surface of the waterproof through-hole 111. The second plastic sealant end cap 213 has a disc-shaped structure and is used to cover and seal the other end of the iron core body 22 and the magnetic tile 23. Figure 6 and Figure 7 As shown, the fixed sealing cover 123 is a cover with a T-shaped elongated structure in cross-section. The extended portions at both ends of the top of the fixed sealing cover 123 are respectively fixedly covered on one end of the corresponding magnetic tile 23, thereby fixing and sealing the magnetic tile 23 to the outer surface of the iron core body 22. While fixing the magnetic tile 23, it also prevents water from entering the iron core body 22 and corroding the iron core body 22. Thus, the first plastic-sealed end cap 212, the second plastic-sealed end cap 213, and the fixed sealing cover 123 form a waterproof cavity 215 on the outer surface of the waterproof through hole 111. The entire iron core assembly is placed in the waterproof cavity 215, achieving the purpose of waterproofing and rust prevention. In other specific embodiments of the present invention, the fixed sealing cover 123 can also be a cylindrical structure. The first plastic-sealed end cap 212, the second plastic-sealed end cap 213, and the cylindrical fixed sealing cover 123 can also form a waterproof cavity 215 on the outer surface of the waterproof through hole 111. Therefore, the present invention does not limit the specific structural form of the fixed sealing cover 123. The iron core assembly is fixedly sealed in the waterproof cavity 215 to prevent the iron core body 22 from rusting after being immersed in water, thus ensuring the reliable operation of the rotor structure.

[0066] The rotor structure provided in this embodiment of the invention also includes a shielding cover 214, which covers and sleeves the outer surface of the waterproof iron core 20. The shielding cover 214 is used to prevent the waterproof iron core 20 from breaking due to centrifugal force during operation. Specifically, the first plastic-sealed end cap 212 has a first locking part at its end away from the waterproof through hole 111, and the second plastic-sealed end cap 213 has a second locking part at its end away from the waterproof through hole 111. The first locking part and the second locking part lock and confine the shielding cover 214 between the first plastic-sealed end cap 212 and the second plastic-sealed end cap 213, and cover the outer surface of the waterproof iron core 20, thereby strengthening the structural strength of the waterproof iron core 20 and preventing it from breaking due to centrifugal force during operation. Figure 5 The diagram shown is a schematic of the rotor structure without the shield 214 installed. Figure 6 The demonstration shows a circular, barrel-shaped shield 214, which is fitted onto... Figure 5The outer surface of the waterproof iron core 20 shown will prevent the components of the waterproof iron core 20 from cracking due to centrifugal force during operation.

[0067] Specifically, in the embodiment of the present invention, as Figure 4 shown, the first locking portion is a first boss 121 with a circular boss structure circumferentially arranged around the waterproof through hole 111 at one end of the first plastic sealing end cover 212. The second locking portion includes: a second boss 131 and a third boss 132 arranged at a predetermined distance apart. Both the second boss 131 and the third boss 132 are circular boss structures circumferentially arranged around the waterproof through hole 111 at one end of the second plastic sealing end cover 213. Specifically, the diameter d1 of the first boss 121 is greater than the outer diameter d2 of the waterproof iron core 20, the diameter d3 of the second boss 131 is less than the outer diameter d2 of the waterproof iron core 20, the third boss 132 is arranged at the end of the second boss 131, and the diameter d4 of the third boss 132. The size relationship of each diameter is d3 < d4 < d2, where the "<" symbol represents "less than". The shielding cover 214 is a cylindrical shape with both ends open. At the second boss 131, one end of the shielding cover 214 is bent. After bending, both ends of the shielding cover 214 are limited and locked between the first plastic sealing end cover 212 and the second plastic sealing end cover 213 by the first boss 121 and the third boss 132, realizing that the shielding cover 214 is sleeved on the waterproof iron core 20. Thus, the shielding cover 214 covers the outer surface of the waterproof iron core 20, preventing the waterproof iron core 20 from cracking due to centrifugal force during operation and improving the structural strength of the rotor structure.

[0068] As Figure 10 shown, in a specific embodiment of the present invention, a ring-shaped connecting groove 124 is provided on the outer side of one of the first plastic sealing end cover 212 and the second plastic sealing end cover 213. The shielding cover 214 includes a shielding cylinder 141, a first buckling structure 142, and a second buckling structure. The shielding cylinder 141 is a circular cylindrical structure. The first buckling structure 142 is fixed at the first opening end of the shielding cylinder 141. The first buckling structure 142 includes an end cover 421 and a ring-shaped connecting protrusion 422 adapted to the ring-shaped connecting groove 124. A connecting hole 423 adapted to the rotating shaft 10 is provided in the middle of the end cover 421. The connecting hole 423 is used to avoid the rotating shaft 10 so that the rotating shaft 10 can operate normally. The ring-shaped connecting protrusion 422 is fixed at one end of the end cover 421 facing the second opening end of the shielding cylinder 141. The second buckling structure is fixed at the second opening end of the shielding cylinder 141. The second buckling structure is an annular waterproof cover 143, and the annular waterproof cover 143 is used for socketing with the outer side of the other of the first plastic sealing end cover 212 and the second plastic sealing end cover 213.

[0069] In this embodiment of the invention, the waterproof structure 21 is further provided with an axial positioning hole 112, and the end face of the iron core body 22 located in the axial direction is exposed at the axial positioning hole 112; the rotor structure also includes a rust-proof cover 50, which is fixed to the end face of the iron core body 22 exposed at the axial positioning hole 112 to prevent liquid from entering through the axial positioning hole 112 and contacting the iron core body 22, thereby preventing the iron core body 22 from rusting and achieving the purpose of waterproofing and rust prevention. In this embodiment of the invention, both ends of the waterproof structure 21 are provided with axial positioning holes 112, and both ends of the iron core body 22 are exposed at the axial positioning holes 112. Therefore, a rust-proof cover 50 can be provided at one exposed end of the iron core body 22, and a plug 60 can be provided at the other end. The plug 60 is a stud structure adapted to the axial positioning hole 112. The plug 60 is inserted into the axial positioning hole 112 and has an interference fit with the axial positioning hole 112 to prevent liquid from entering through the axial positioning hole 112 and contacting the iron core body 22, thereby preventing the iron core body 22 from rusting. Figure 1 As shown, one end of the plug 60 is configured as a cap-like structure with a diameter larger than that of the axial positioning hole 112, and the cap-like structure at one end of the plug 60 is welded together with the waterproof structure 21 at the location of the axial positioning hole 112, thereby covering and sealing the axial positioning hole 112 and further improving the waterproof capability of the overall structure.

[0070] The second embodiment of the present invention also provides a shielded pump, which includes a rotor structure. For the specific structural composition of the rotor structure, please refer to the content provided in the first embodiment of the present invention. The embodiments of the present invention will not be described again here.

[0071] The third embodiment of the present invention also provides a device including a shielded pump, which is provided by the second embodiment of the present invention. The device may include heating devices such as underfloor heating and heat pumps; the embodiments of the present invention are not limited to this specific device.

[0072] The fourth embodiment of the present invention provides a wet-running rotor, which is implemented based on the rotor structure provided in the first embodiment of the present invention. Specifically, the embodiments of the present invention provide wet-running rotors obtained under three manufacturing schemes, mainly including:

[0073] Option 1: A wet-running rotor, such as Figures 1 to 4As shown, the device includes a plastic-encapsulated rotor assembly and a plug 60. The plastic-encapsulated rotor assembly includes a shaft 10, a waterproof iron core 20, and a first stop structure 30. The waterproof iron core 20 includes a waterproof structure 21, an iron core assembly, a rust-proof cover 50, and a shielding cover 214. The iron core assembly includes an iron core body 22 and a magnetic tile 23. The waterproof structure 21 is a plastic-encapsulated part. In actual production, the shaft 10, the iron core body 22, the magnetic tile 23, and the rust-proof cover 50 can be plastic-encapsulated into a single unit. The iron core body 22 is an annular structure with a central through hole 221. Multiple positioning protrusions 222 are evenly distributed on the outer circular surface of the iron core body 22. The magnetic tile 23 is tightly attached to the outer circular surface of the iron core body 22 and is positioned by the positioning protrusions 222. Multiple through holes 223 are provided on the iron core body 22 for positioning on the injection mold during injection molding.

[0074] The rotating shaft 10 is located at the central through-hole 221 of the iron core body 22 and penetrates the iron core body 22. The rotating shaft 10 is cylindrical and made of ceramic or stainless steel. A concave-flat groove (i.e., a first stop groove 32) is machined on the outer surface of the rotating shaft 10 opposite to the iron core body 22. A plastic-sealed waterproof structure 21 is formed between the rotating shaft 10 and the iron core body 22. After the wet-running rotor is integrally plastic-sealed, a first stop protrusion 31 that matches the first stop groove 32 is formed on the inner wall surface of the waterproof through-hole 111 of the waterproof structure 21. Petal-shaped protrusions are arranged along the circumference on the inner wall surface of the central through-hole 221 of the iron core body 22. The first stop groove 32 of the rotating shaft 10 and the petal-shaped protrusions of the iron core body 22 increase the bonding force between the plastic-sealed shaft and the waterproof structure 21, preventing relative rotation between the rotating shaft 10 and the iron core body 22. Plastic covers both ends of the iron core body 22 and the magnetic tile 23. An axial positioning hole 112 is provided on the end face of the plastic waterproof structure 21 for axial positioning of the iron core body 22 and the magnetic tile 23. A rust-proof cover 50, made of stainless steel, is located on one end face of the iron core body 22 to prevent it from being exposed. The other end face of the iron core body 22 is not covered by the rust-proof cover 50, leaving the iron core body 22 exposed at the axial positioning hole 112. In this case, a plug 60 is inserted into the exposed axial positioning hole 112 to seal the iron core body 22. The plug 60 is press-fitted into the axial positioning hole 112. The plug 60 can also be made of plastic. To increase sealing, the end of the plug 60 is welded to the plastic waterproof structure 21.

[0075] The rust-proof cover 50 can also be made of plastic. The rust-proof cover 50 can be directly fixed to the end of the iron core body 22, or it can be positioned on one side of the iron core body 22 with a positioning post 52 (e.g., Figure 6 As shown, the positioning pin 52 is inserted into the through hole 223 of the iron core body 22. The positioning pin 52 and the through hole 223 are interference-fitted to achieve the sealing of the iron core body 22 and achieve the purpose of waterproofing and rust prevention.

[0076] A water passage hole 119 is provided on the waterproof structure 21. The water passage hole 119 penetrates through the waterproof structure 21. When the wet-running rotor operates in water, water flows through the water passage hole 119. An anti-wear protrusion 117 can be provided on one end face of the waterproof iron core 20. The anti-wear protrusions 117 are evenly distributed along the circumference. In order to reduce the dynamic unbalance amount, the anti-wear protrusions 117 are provided at the position of the waterproof iron core 20 close to the rotating shaft 10. The function of the anti-wear protrusion 117: During the operation of the rotor structure, the end face of the anti-wear protrusion 117 rubs against the bearing end face (similar to a sliding bearing).

[0077] A first boss 121 with a circular boss structure is provided at one end of the waterproof iron core 20. The diameter d1 of the first boss 121 is larger than the outer diameter d2 of the waterproof iron core 20. A second boss 131 with a circular boss structure is provided at the other end of the waterproof iron core 20. The diameter d3 of the second boss 131 is smaller than the outer diameter d2 of the waterproof iron core 20. A third boss 132 with a circular boss structure is provided at the end of the second boss 131. The diameter of the third boss 132 is d4. The size relationship of the diameters of each circular boss is d3 < d4 < d2, where the "<" symbol represents "less than". The shielding cover 214 is a cylindrical shape with openings at both ends. At the second boss 131, one end of the shielding cover 214 is bent. After bending, the two ends of the shielding cover 214 are respectively limited and locked between the first plastic sealing end cover 212 and the second plastic sealing end cover 213, realizing that the shielding cover 214 is sleeved on the waterproof iron core 20. Thus, the shielding cover 214 is fixedly sleeved on the outer surface of the waterproof iron core 20, preventing the waterproof iron core 20 from cracking due to centrifugal force during operation, positioning the various components of the waterproof iron core 20 with each other and interlocking them, and improving the structural strength of the rotor structure.

[0078] Solution two: As Figures 8 to 9As shown, a wet-operation rotor includes a plastic-encapsulated rotor assembly. The plastic-encapsulated rotor assembly includes a shaft 10, a core body 22, magnets 23, a rust-proof cover 50, and a waterproof structure 21. The waterproof structure 21 is a plastic-encapsulated component. In actual production, the shaft 10, core body 22, magnets 23, and rust-proof cover 50 can be plastic-encapsulated into a single unit. The core body 22 is an annular structure with a central through-hole 221. Multiple positioning protrusions 222 are evenly distributed on the outer surface of the core body 22. The magnets 23 are tightly attached to the outer surface of the core body 22 and positioned by the positioning protrusions 222. Multiple positioning teeth (i.e., second stop protrusions 41) extend axially from the inner side of the central through-hole 221 of the core body 22. The shaft 10 is located at the central through-hole 221 of the core body 22 and penetrates through the core body 22. The rotating shaft 10 is a cylinder made of ceramic or stainless steel. The iron core body 22 is positioned with the rotating shaft 10 by positioning teeth. The outer surface of the rotating shaft 10 is machined with a concave-flat groove (i.e., the first stop groove). The concave-flat groove is located on both sides of the positioning teeth inside the iron core body 22, which can further enhance the bonding force between the rotating shaft 10 and the plastic waterproof structure 21.

[0079] To prevent the iron core from being exposed, an axial positioning hole 112 is provided on the end face of the plastic waterproof structure 21 for axial positioning of the iron core body 22 and the magnetic tile 23. Rust-proof covers 50 are provided on both end faces of the iron core body 22 to prevent the iron core body 22 from rusting when exposed to water.

[0080] Similar to Scheme 1, a water passage hole 119 is provided on the waterproof structure 21, which penetrates the waterproof structure 21. When the wet-running rotor is running in water, water flows through the water passage hole 119. Anti-wear protrusions 117 can be provided on one end face of the waterproof iron core 20. The anti-wear protrusions 117 are evenly distributed along the circumference. In order to reduce the dynamic imbalance, the anti-wear protrusions 117 are located near the rotating shaft 10 of the waterproof iron core 20.

[0081] One end of the waterproof iron core 20 is provided with a first boss 121, the diameter d1 of the first boss 121 is larger than the outer diameter d2 of the waterproof iron core 20, the other end of the waterproof iron core 20 is provided with a second boss 131, the diameter d3 of the second boss 131 is smaller than the outer diameter d2 of the waterproof iron core 20, the end of the second boss 131 is provided with a third boss 132, the diameter of the third boss 132 is d4, and the size relationship of the diameters of each circular boss is d3 < d4 < d2, where the "<" symbol represents "less than". The shielding cover 214 is a cylindrical shape with openings at both ends, and the shielding cover 214 can be made of non-magnetic materials such as stainless steel. At the second boss 131, one end of the shielding cover 214 is bent. After bending, both ends of the shielding cover 214 are limited and locked between the first plastic sealing end cover 212 and the second plastic sealing end cover 213 by the first boss 121 and the third boss 132, so as to realize sleeving the shielding cover 214 on the waterproof iron core 20, prevent the waterproof iron core 20 from bursting due to centrifugal force during operation, and make the various components of the waterproof iron core 20 position each other and interlock, thereby improving the structural strength of the rotor structure.

[0082] Solution 3: A wet-running rotor, as Figures 10 to 12 shown, includes a plastic-sealed rotor and a shielding cover 214. The plastic-sealed rotor includes a rotating shaft 10, an iron core body 22, magnetic tiles 23 (also known as magnetic steels), an anti-rust cover 50 and an injection molding part (i.e., a waterproof structure 21). A shaft flat (i.e., a first stop groove) is provided in the middle of the rotating shaft 10, and the shaft flat cooperates with the waterproof structure 21 to prevent the rotating shaft 10 from radially and axially moving during the operation of the wet-running rotor. A boss A411 (i.e., another specific structural form of the second stop protrusion 41, the boss A411 can be a rectangular boss structure, the rectangular boss structure can extend from one end of the inner wall of the central through hole 221 to the other end, and the rectangular boss structure can also be a boss with a length shorter than the axial length of the central through hole 221) is provided on the inner wall of the central through hole 221 of the iron core body 22, and the boss A411 cooperates with the injection molding body (i.e., the waterproof structure 21) to prevent the iron core body 22 from radially moving. A positioning protrusion 222 is provided on the outer circular surface of the iron core body 22 for radial positioning of the magnetic tiles 23 and to prevent the magnetic tiles 23 from radially moving. An anti-rust cover 50 such as a nylon pad is placed at the shaft head end of the iron core body 22, and a hook 51 is provided at the inner circle of the anti-rust cover 50, and the hook 51 cooperates with the inner wall of the central through hole 221 of the iron core body 22 to prevent the anti-rust cover 50 from radially moving. This structure makes the various components of the plastic-sealed rotor interlock and position each other, thereby improving the mechanical strength of the plastic-sealed rotor.

[0083] The rotating shaft 10, iron core body 22, magnet 23, and anti-rust cover 50 are encapsulated in plastic as a single unit. The injection-molded body formed between the components constitutes the waterproof structure 21. After the encapsulated rotor is injection molded, a shielding cover 214 is wrapped around the outer periphery of the encapsulated rotor. A circular groove (i.e., annular connecting groove 124) is provided on the inner side of the shaft tail end of the waterproof structure 21. The annular connecting groove 124 cooperates with the annular connecting protrusion 422 at one end of the shielding cover 214 to form a curved sealing structure. The other end of the shielding cover 214 adopts a flanged structure (i.e., annular waterproof cover 143) to prevent water from entering the exposed iron core body 22 of the encapsulated rotor and thus corroding the iron core body 22.

[0084] like Figure 10 As shown, at one end of the waterproof structure 21 along its axial direction, a positioning hole A113 is provided, which is axially opposite to the magnetic tile 23. This hole is used to limit the axial position of the magnetic tile 23 during injection molding. Each magnetic tile 23 corresponds to two positioning holes A113. The waterproof structure 21 is also provided with a positioning hole B114 axially opposite to the junction of the magnetic tile 23 and the iron core body 22. The positioning hole B114 is used to limit the axial position of the iron core body 22 and the magnetic tile 23. Each magnetic tile 23 has one positioning hole B114. A positioning groove A118 is provided on the outside of the waterproof structure 21. The positioning groove A118 is used to limit the radial position of the magnetic tile 23 and the iron core body 22 during injection molding. The positioning groove A118 is not through-hole to prevent water from entering the groove and affecting the rotor operation. At the other end of the waterproof structure 21, a positioning hole C115 is provided. The positioning hole C115 is used for axial positioning of the magnetic tile 23 and the iron core body 22. The positioning hole C115 is axially opposite to the anti-rust cover 50 to prevent the iron core from being exposed to the air and causing the iron core to rust.

[0085] In conclusion, the wet-running rotor provided in this embodiment of the invention adopts a magnetic tile 23 structure, which, compared to magnetic rings and magnetic powder, ensures the operating performance of the wet-running rotor while reducing the rotor's processing difficulty. The shaft 10 and the iron core assembly are encased in a waterproof plastic structure 21, and structures such as plugs 60, rust-proof covers 50, and shielding covers 214 are used to enhance the waterproof and rust-proof effect of the wet-running rotor. When the wet-running rotor is injection molded, multiple positioning holes and positioning grooves are designed to improve the finished quality of the rotor. The use of concave flats and bosses ensures that the rotor components are mutually positioned and interlocked, improving structural strength.

[0086] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0087] Furthermore, it should be noted that the use of terms such as “” and “” to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0088] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A rotor structure, characterized in that, include: Rotating shaft (10); A waterproof iron core (20) includes a waterproof structure (21) and an iron core assembly; the waterproof structure (21) is provided with a waterproof through hole (111) and a waterproof cavity (215), the rotating shaft (10) passes through the waterproof through hole (111), the waterproof cavity (215) is arranged around the outer periphery of the waterproof through hole (111), the iron core assembly includes an iron core body (22) and a magnetic tile (23), the iron core body (22) is provided with a central through hole (221), the magnetic tile (23) surrounds and adheres to the outer surface of the iron core body (22), and the iron core assembly is fixed in the waterproof cavity (215); The first stop structure (30) is disposed between the rotating shaft (10) and the waterproof iron core (20) to prevent relative rotation between the rotating shaft (10) and the waterproof iron core (20); The first stop structure (30) includes: a first stop protrusion (31), which is disposed on one of the inner wall surface of the waterproof through hole (111) and the outer surface of the rotating shaft (10); and a first stop groove (32), which is adapted to the first stop protrusion (31) and is disposed on the other of the inner wall surface of the waterproof through hole (111) and the outer surface of the rotating shaft (10) to lock the waterproof iron core (20) at a first predetermined position on the rotating shaft (10). It also includes: a second stop structure, which is disposed between the iron core body (22) and the waterproof structure (21) to prevent the iron core body (22) from moving; The second stop structure includes: a second stop protrusion (41), which is disposed on one of the iron core body (22) and the waterproof structure (21); a second stop groove (42), which is adapted to the second stop protrusion (41); and the second stop groove (42) is disposed on the other of the iron core body (22) and the waterproof structure (21) to lock the iron core body (22) at a second predetermined position on the outer surface of the waterproof through hole (111). The waterproof structure (21) includes: a plastic seal (211), the waterproof through hole (111) being located in the middle of the plastic seal (211); a first plastic seal end cap (212), the first plastic seal end cap (212) being located at one end of the outer surface of the waterproof through hole (111); a second plastic seal end cap (213), the second plastic seal end cap (213) being located at the other end of the outer surface of the waterproof through hole (111); and a fixed sealing cap (123), the fixed sealing cap (123) being located between the first plastic seal end cap (212) and the second plastic seal end cap (213), for covering and sealing the magnetic tile (23) on the outer surface of the iron core body (22), the first plastic seal end cap (212), the second plastic seal end cap (213) and the fixed sealing cap (123) forming the waterproof cavity (215) on the outer surface of the waterproof through hole (111).

2. The rotor structure according to claim 1, characterized in that, The first stop structure (30) has multiple sets, and the two opposite ends of the second stop structure are respectively provided with one or more sets of the first stop structure (30).

3. The rotor structure according to claim 1 or 2, characterized in that, The first stop protrusion (31) and the first stop groove (32) are both multiple; the multiple first stop protrusions (31) are evenly arranged circumferentially along the inner wall surface of the waterproof through hole (111), and the first stop groove (32) is arranged in a one-to-one correspondence with the first stop protrusion (31) and is located on the outer surface of the rotating shaft (10).

4. The rotor structure according to claim 1 or 2, characterized in that, The second stop protrusion (41) and the second stop groove (42) are both multiple; the multiple second stop protrusions (41) are evenly arranged circumferentially along the inner wall surface of the central through hole (221) on the iron core body (22), and the second stop groove (42) is arranged one-to-one with the second stop protrusion (41) and is located on the bottom surface of the waterproof cavity (215) on the waterproof structure (21).

5. The rotor structure according to claim 1, characterized in that, Also includes: A shielding cover (214) is fitted over the outer surface of the waterproof iron core (20).

6. The rotor structure according to claim 5, characterized in that, The first plastic-sealed end cap (212) is provided with a first locking part at the end away from the waterproof through hole (111), and the second plastic-sealed end cap (213) is provided with a second locking part at the end away from the waterproof through hole (111). The first locking part and the second locking part lock and limit the shield (214) between the first plastic-sealed end cap (212) and the second plastic-sealed end cap (213), and cover the outer surface of the waterproof iron core (20).

7. The rotor structure according to claim 5, characterized in that, An annular connecting groove (124) is provided on the outer side of either the first plastic-sealed end cap (212) or the second plastic-sealed end cap (213). The shielding cover (214) includes: The shielding cylinder (141) is a circular cylindrical structure; The first fastening structure (142) is fixed to the first opening end of the shielding cylinder (141). The first fastening structure (142) includes an end cap (421) and an annular connecting protrusion (422) adapted to the annular connecting groove (124). The end cap (421) is provided with a connecting hole (423) adapted to the rotating shaft (10) in the middle. The annular connecting protrusion is fixed to one end of the end cap (421) facing the second opening end of the shielding cylinder (141). The second fastening structure is fixed to the second opening end of the shielding cylinder (141). The second fastening structure is an annular waterproof cover (143). The annular waterproof cover (143) is used to be sleeved on the other side of the first plastic seal end cap (212) and the second plastic seal end cap (213).

8. The rotor structure according to claim 1, characterized in that, The waterproof structure (21) is further provided with an axial positioning hole (112), and the end face of the iron core body (22) located in the axial direction is exposed at the axial positioning hole (112); the rotor structure also includes: Rust-proof cover (50) is fixed to the exposed end face of the iron core body (22) at the axial positioning hole (112) to prevent liquid from entering and contacting the iron core body (22) from the axial positioning hole (112).

9. The rotor structure according to claim 1, characterized in that, The waterproof structure (21) is further provided with an axial positioning hole (112), and the end face of the iron core body (22) located in the axial direction is exposed at the axial positioning hole (112); the rotor structure also includes: A plug (60) is adapted to the axial positioning hole (112). The plug (60) is inserted into the axial positioning hole (112) and is press-fitted with the axial positioning hole (112) to prevent liquid from entering from the axial positioning hole (112) and contacting the iron core body (22).

10. A canned pump, characterized in that, The shielded pump includes the rotor structure described in any one of claims 1 to 9.

11. A heating device, characterized in that, The heating device includes the shielded pump as described in claim 10.

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