Shield pump

Abstract

The utility model provides a shield pump which comprises a pump head provided with a first pump opening and a second pump opening. A main cavity is defined by the pump head and the shielding sleeve, and the first pump opening and the second pump opening are both communicated with the main cavity; the stator structure is provided with a rotor mounting hole, the stator structure comprises a stator body and an injection molding layer, the injection molding layer wraps at least part of the stator body, and the stator body comprises a stator iron core; the rotor structure is mounted in the rotor mounting hole, the stator structure and the rotor structure are isolated by the shielding sleeve, and the rotor structure is located in the main cavity; the impeller is arranged in the main cavity, and the rotor structure is connected with the impeller; and at least part of the first sealing element is arranged between the stator structure and the shielding sleeve, and the first sealing element prevents air from entering the rotor mounting hole through a gap between the stator structure and the shielding sleeve. The shield pump solves the technical problem that a shield pump in the prior art is short in service life.

Description

Technical Field

[0001] The utility model relates to the field of pumps, and in particular, to a canned motor pump. Background Art

[0002] A canned motor pump is a pump that isolates the stator and the rotor through a shield sleeve, enabling the rotor to operate entirely within a closed space. It does not require a dynamic sealing structure and has excellent sealing performance. When transporting fluids, it can achieve complete leak-free operation. Therefore, it is widely used in transporting high-temperature, high-pressure, corrosive, flammable, explosive, highly toxic, and precious liquids.

[0003] However, there are certain deficiencies in the design of canned motor pumps in the related art. After being used for a period of time, it is prone to problems such as performance degradation, increased noise, and increased heat generation, and thus has to be replaced. Therefore, the service life of canned motor pumps in the related art is generally short.

[0004] It can be seen that the canned motor pump in the related art has the technical problem of short service life, and for this technical problem, no effective solution has been proposed yet. Summary of the Utility Model

[0005] The main purpose of the present utility model is to provide a canned motor pump to solve the technical problem of short service life of canned motor pumps in the related art.

[0006] To achieve the above purpose, the present utility model provides a canned motor pump, which includes: a pump head having a first pump port and a second pump port; a shield sleeve, with a main chamber formed between the pump head and the shield sleeve, and both the first pump port and the second pump port communicate with the main chamber; a stator structure provided with a rotor mounting hole, the stator structure includes a stator body and an injection molding layer, the injection molding layer wraps at least part of the stator body, and the stator body includes a stator core; a rotor structure mounted in the rotor mounting hole, the shield sleeve isolates the stator structure and the rotor structure, and the rotor structure is located in the main chamber; an impeller disposed in the main chamber, the rotor structure is connected to the impeller; a first seal, at least part of the first seal is disposed between the stator structure and the shield sleeve, and the first seal prevents air from entering the rotor mounting hole through the gap between the stator structure and the shield sleeve.

[0007] Further, the position of the stator core corresponding to the inner wall surface of the rotor mounting hole is exposed.

[0008] Further, a seal ring mounting groove is provided at the inner corner of the end of the rotor mounting hole close to the pump head. The seal ring mounting groove is an annular cut surrounding the rotor mounting hole, and the first seal is disposed in the seal ring mounting groove; the shield sleeve includes a barrel portion and a flanging portion at the barrel mouth position, the flanging portion is folded outward toward the outside of the barrel portion, and both the barrel portion and the flanging portion are in pressing contact with the first seal.

[0009] Furthermore, the rotor mounting hole penetrates through the stator structure, and the canned motor pump further includes: a control box disposed on the side of the stator structure away from the pump head, connected to the stator structure, with electrical components provided inside, and the electrical components are electrically connected to the stator windings of the stator body; a second seal disposed between the stator structure and the control box to seal the gap therebetween, wherein the second seal surrounds the rotor mounting hole.

[0010] Furthermore, the canned motor pump includes connection terminals, and both the stator windings and the electrical components are connected to the connection terminals. Among them, the second seal includes a seal body that surrounds the connection terminals.

[0011] Furthermore, the second seal includes a first auxiliary seal portion, and the seal body surrounds the first auxiliary seal portion. A terminal avoidance hole is provided on the first auxiliary seal portion, and the connection terminal is inserted through the terminal avoidance hole. When the stator structure and the control box are fitted together, both the stator structure and the control box are in pressing contact with the first auxiliary seal portion.

[0012] Furthermore, there are multiple connection terminals, and all the multiple connection terminals are inserted through the terminal avoidance hole; or, there are multiple connection terminals and multiple terminal avoidance holes, and the multiple connection terminals are correspondingly inserted through the multiple terminal avoidance holes one by one.

[0013] Furthermore, a through hole is provided on the control box to communicate the inside and outside of the control box, and the connection terminal passes through the through hole; the control box includes a box body and a box cover, the box cover is detachably installed on the box body, and an accommodation cavity is formed between the box body and the box cover, and the electrical components are located in the accommodation cavity; among them, the canned motor pump further includes a fourth seal located at the mating position between the box body and the box cover, and both the box body and the box cover are in pressing contact with the fourth seal.

[0014] Furthermore, the canned motor pump includes a first connecting member, at least a part of which is embedded in the injection molding layer, and the canned motor pump further includes a second connecting member that cooperates with the first connecting member to connect the stator structure and the control box through the first connecting member and the second connecting member; among them, the second seal includes a second auxiliary seal portion, and a connecting member avoidance hole is provided on the second auxiliary seal portion, and the first connecting member is inserted through the connecting member avoidance hole. When the stator structure and the control box are fitted together, both the stator structure and the control box are in pressing contact with the second auxiliary seal portion.

[0015] Furthermore, the canned motor pump includes a third seal disposed between the pump head and the shielding sleeve to seal the gap between the pump head and the shielding sleeve.

[0016] The canned motor pump applying the technical solution of the present utility model includes: a pump head having a first pump port and a second pump port; a shielding sleeve, a main chamber is formed between the pump head and the shielding sleeve, and both the first pump port and the second pump port communicate with the main chamber; a stator structure provided with a rotor mounting hole, the stator structure includes a stator body and an injection molding layer, the injection molding layer wraps at least a part of the stator body, and the stator body includes a stator core; a rotor structure mounted in the rotor mounting hole, the shielding sleeve isolates the stator structure and the rotor structure, and the rotor structure is located in the main chamber; an impeller disposed in the main chamber, the rotor structure is connected to the impeller; a first seal, at least a part of the first seal is disposed between the stator structure and the shielding sleeve, and the first seal prevents air from entering the rotor mounting hole through the gap between the stator structure and the shielding sleeve. For the canned motor pump with such a structural design, a first seal is designed between the stator structure and the shielding sleeve, and the gap between the two can be sealed through the first seal, so that external air cannot enter the rotor mounting hole through the gap between the stator structure and the shielding sleeve. Therefore, condensed water will not be formed in the rotor mounting hole, and the situation of the iron core of the stator body being rusted due to the entry of condensed water into the rotor mounting hole can be avoided, effectively extending the service life of the canned motor pump and solving the technical problem of the short service life of the canned motor pump in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specification drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0018] Figure 1 is a schematic external structure diagram of an embodiment of the canned motor pump of the present utility model;

[0019] Figure 2 is a schematic cross-sectional structure diagram of an embodiment of the canned motor pump of the present utility model;

[0020] Figure 3 is Figure 2 a partial enlarged schematic diagram;

[0021] Figure 4 is a schematic half-sectional structure diagram of an embodiment of the canned motor pump of the present utility model;

[0022] Figure 5 is Figure 4 a partial enlarged schematic diagram;

[0023] Figure 6 is a schematic structure diagram of a second seal of an embodiment of the canned motor pump of the present utility model;

[0024] Figure 7 is a schematic structure diagram of a shielding sleeve of an embodiment of the canned motor pump of the present utility model;

[0025] Figure 8 Structural schematic diagram of the control box of the embodiment of the canned motor pump of the present utility model;

[0026] Figure 9 Structural schematic diagram inside the control box of the embodiment of the canned motor pump of the present utility model.

[0027] Among them, the above-mentioned drawings include the following reference numerals:

[0028] 1, pump head; 11, first pump port; 12, second pump port; 13, main chamber; 14, strengthening structure; 2, shielding sleeve; 21, barrel part; 22, flanging part; 23, shielding cover; 3, stator structure; 30, rotor mounting hole; 31, stator body; 311, stator core; 312, insulating skeleton; 313, terminal bracket; 32, injection molding layer; 4, rotor structure; 5, impeller; 6, control box; 61, electrical components; 62, box body; 63, box cover; 7, second seal; 701, first auxiliary seal part; 702, second auxiliary seal part; 71, seal body; 72, terminal avoidance hole; 73, connector avoidance hole; 81, first seal; 82, third seal; 83, fourth seal; 100, connection terminal; 201, first connector; 202, second connector mounting hole. Detailed implementation manners

[0029] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0030] The applicant has found through research that after the canned motor pump in the related art is used for a long time, the reasons for the performance decline, noise increase, heat increase, etc. are that air can enter through the gap between the stator structure and the shielding sleeve, so the condensed water generated by the cold air can enter the rotor mounting hole of the stator structure. The stator core of the stator structure is often exposed or poorly protected in the rotor mounting hole. Therefore, when water enters the stator mounting hole, the stator core is likely to rust, damaging the integrity of the magnetic circuit and thus reducing the performance of the motor. In addition, the damage to the iron core will also cause magnetic field imbalance, resulting in additional noise during the operation of the motor. Moreover, after the iron core is damaged, the heat generated by the motor during operation cannot be effectively dissipated, leading to too rapid an increase in the internal temperature of the motor.

[0031] Please refer to Figures 1 to 9, the present utility model provides a canned motor pump, which includes: a pump head 1 having a first pump port 11 and a second pump port 12; a shield 2, a main chamber 13 is formed between the pump head 1 and the shield 2, and both the first pump port 11 and the second pump port 12 communicate with the main chamber 13; a stator structure 3, a rotor mounting hole 30 is provided on the stator structure 3, the stator structure 3 includes a stator body 31 and an injection molding layer 32, the injection molding layer 32 wraps at least a part of the stator body 31, and the stator body 31 includes a stator core 311; a rotor structure 4, the rotor structure 4 is installed in the rotor mounting hole 30, the shield 2 isolates the stator structure 3 and the rotor structure 4, and the rotor structure 4 is located in the main chamber 13; an impeller 5, the impeller 5 is arranged in the main chamber 13, and the rotor structure 4 is connected to the impeller 5; a first seal 81, at least a part of the first seal 81 is arranged between the stator structure 3 and the shield 2, and the first seal 81 prevents air from entering the rotor mounting hole 30 through the gap between the stator structure 3 and the shield 2.

[0032] For the canned motor pump designed with this structure, a first seal 81 is designed between the stator structure 3 and the shield 2. The gap between the two can be sealed by the first seal 81, so that external air cannot enter the rotor mounting hole 30 through the gap between the stator structure 3 and the shield 2. Therefore, condensate will not be formed in the rotor mounting hole 30, and the situation of the core of the stator body 31 being rusted due to the entry of condensate into the rotor mounting hole 30 can be avoided, effectively extending the service life of the canned motor pump and solving the technical problem of the short service life of the canned motor pump in the related art.

[0033] In actual implementation, the number of the first seals 81 is not limited. For example, in an optional implementation manner, the rotor mounting hole 30 is in the form of a blind hole, that is, it has only one opening and is not in the form of penetrating the stator structure 3. In this embodiment, the number of the first seals 81 is one, which seals the gap between the stator structure 3 and the shield 2, thus preventing air or water from entering the rotor mounting hole 30. In another optional implementation manner, the rotor mounting hole 30 can be set in the form of a through hole, that is, the rotor mounting hole 30 penetrates the stator structure 3. At this time, two or more first seals 81 can be set, which are respectively arranged at both ends of the rotor mounting hole 30 to seal both ends of the rotor mounting hole 30 and prevent condensate from entering the rotor mounting hole 30 from both ends. For another example, in another optional implementation manner, a control box 6 is provided on the side of the stator structure 3 away from the pump head 1, and the mating position between the stator structure 3 and the control box 6 is sealed (for example, a gasket surrounding the rotor mounting hole 30 is provided between the two). Therefore, external gas will not enter the rotor mounting hole 30 through the gap between the two, and at this time, only the first seal 81 needs to be provided on the side of the rotor mounting hole 30 close to the pump head 1.

[0034] In this embodiment, the stator body 31 includes: a stator core 311, an insulating skeleton 312, and a stator winding. The insulating skeleton 312 is mounted on the stator core 311, and the enameled wire is wound around the insulating skeleton 312 to form the stator winding. Preferably, there are two insulating skeletons 312. Along a preset direction, the two insulating skeletons 312 are inserted into the stator core 311 from both sides, so as to form a stable structure to support the stator winding. Preferably, the stator structure 3 has an integrally molded body structure and a connecting flange. The pump head 1 is connected to the connecting flange through fasteners. Among them, the canned motor pump further includes a reinforcing structure 14, and the reinforcing structure 14 connects the above-mentioned body structure and the connecting flange, thereby improving the structural strength of the stator structure 3 and ensuring the reliability of its connection with the pump head 1. Preferably, the reinforcing structure 14 is an integrally molded rib. In a preferred embodiment, the canned motor pump further includes a shielding cover 23. The shielding cover 23 is arranged between the rotor structure 4 and the impeller 5. The shielding cover 23 covers the opening of the shielding sleeve 2. An avoidance opening is provided on the shielding cover 23, and the shaft of the rotor structure 4 passes through the avoidance opening. By providing the shielding cover 23, impurities in the working medium can be blocked from entering the rotor structure 4, ensuring the reliability of the rotor structure 4 during operation.

[0035] In a specific embodiment, the position of the stator core 311 corresponding to the inner wall surface of the rotor mounting hole 30 is exposed. That is to say, in this embodiment, at least part of the inner peripheral surface of the stator body 31 is not provided with the injection molding layer 32, but the stator core 311 is directly exposed in the rotor mounting hole 30, thereby reducing the loss of magnetic force and ensuring the working efficiency of the pump. Since a first seal 81 is provided between the shielding sleeve 2 and the stator structure 3, the air outside the canned motor pump will not enter the rotor mounting hole 30 through the gap between the shielding sleeve 2 and the stator structure 3. In this way, condensed water will not be formed in the rotor mounting hole 30, so that the part of the stator core 311 exposed in the rotor mounting hole 30 can be effectively prevented from rusting, and the service life of the canned motor pump can be effectively extended. The canned motor pump adopting this structural design takes into account both the performance and the service life of the pump, and has good application prospects. Of course, in other alternative embodiments, the position of the stator core 311 corresponding to the rotor mounting hole 30 can also be covered with the injection molding layer 32 or other materials to improve waterproofness, but it will cause magnetic field loss and have an adverse effect on the performance of the canned motor pump.

[0036] Specifically, a sealing ring mounting groove is provided at the inner corner of the end of the rotor mounting hole 30 close to the pump head 1. The sealing ring mounting groove is an annular notch surrounding the rotor mounting hole 30, and the first seal 81 is arranged in the sealing ring mounting groove; the shielding sleeve 2 includes a barrel part 21 and a flanging part 22 located at the barrel opening. The flanging part 22 is folded outward towards the outside of the barrel part 21, and both the barrel part 21 and the flanging part 22 are in pressing contact with the first seal 81.

[0037] In this embodiment, the first seal 81 is disposed in the annular notch at the end of the rotor mounting hole 30. After installation, the first seal 81 is squeezed by the barrel portion 21 and the flanging portion 22 of the shielding sleeve 2. Therefore, for the stator structure 3 and the shielding sleeve 2, the first seal 81 can play an axial and radial extrusion sealing role, effectively improving the sealing effect of the first seal 81.

[0038] To ensure the sealing performance of the canned motor pump and reduce the risk of liquid leakage or air intake, as a preferred embodiment, the canned motor pump further includes a third seal 82. The third seal 82 is disposed at the mating position of the pump head 1 and the shielding sleeve 2 to seal the mating position of the pump head 1 and the shielding sleeve 2, preventing the water in the main chamber 13 from flowing out of the canned motor pump under pressure or the outside air from being sucked into the canned motor pump.

[0039] The rotor mounting hole 30 penetrates through the stator structure 3. The canned motor pump further includes: a control box 6. The control box 6 is disposed on the side of the stator structure 3 away from the pump head 1. The control box 6 is connected to the stator structure 3. An electrical component 61 is provided in the control box 6, and the electrical component 61 is electrically connected to the stator winding of the stator body 31; a second seal 7. The second seal 7 is disposed between the stator structure 3 and the control box 6 to seal the gap between the stator structure 3 and the control box 6. Among them, the second seal 7 is disposed around the rotor mounting hole 30.

[0040] In this embodiment, the rotor mounting hole 30 penetrates through the stator structure 3. Therefore, there is a risk of air entering at both ends of the rotor mounting hole 30 to form condensate. On the side of the stator structure 3 away from the pump head 1, there is a control box 6. The control box 6 is connected to the stator structure 3, and the two are sealed by the second seal 7. In this way, the air on this side cannot enter the rotor mounting hole 30 through the gap between the stator structure 3 and the control box 6, and only the first seal 81 needs to be provided on the side of the stator structure 3 close to the pump head 1 for sealing.

[0041] Specifically, the specific form of the electrical component 61 can be various, as long as it can supply power to and / or control the canned motor pump after being electrically connected to the stator structure 3. For example, in this embodiment, the electrical component 61 includes a main control circuit board, on which electrical components will be arranged according to actual needs, and after being electrically connected to the stator body 31 of the stator structure 3, it realizes the power supply and control of the canned motor pump.

[0042] The canned motor pump includes a connection terminal 100. Both the stator winding and the electrical component 61 are connected to the connection terminal 100. Among them, the second seal 7 includes a seal body 71, and the seal body 71 is disposed around the connection terminal 100.

[0043] In this embodiment, the seal body 71 of the second seal 7 is arranged around the connection terminal 100. In this way, the connection terminal 100 can also be sealed and protected by the second seal 7, preventing water in the external environment or condensed water in the air from flowing to the connection terminal 100 and causing a short - circuit fault, which is beneficial to improving the reliability of the canned motor pump.

[0044] In an alternative embodiment, the connection terminal 100 includes: a first insert piece, the first insert piece is electrically connected to the stator winding in the stator structure 3, and a part of the first insert piece is embedded in the injection - molded layer 32; a second insert piece, the second insert piece is fixedly arranged in the control box 6, and the second insert piece is electrically connected to the electrical component 61; wherein, both the first insert piece and the second insert piece are metal pieces, and the first insert piece and the second insert piece are in plug - in fit.

[0045] A part of the first insert piece is embedded in the injection - molded layer. That is to say, after the first insert piece is electrically connected to the stator winding, it is fixed integrally with the stator structure 3 through injection molding, and the first insert piece is fixed by the injection - molded layer 32.

[0046] In this embodiment, the canned motor pump includes a terminal bracket 313, the first insert piece is fixed by the terminal bracket 313, and after injection molding, the terminal bracket 313 is embedded in the injection - molded layer 32.

[0047] In an embodiment of the present utility model, the second seal 7 includes a first auxiliary seal part 701, the seal body 71 is arranged around the first auxiliary seal part 701, a terminal avoidance hole 72 is provided on the first auxiliary seal part 701, the connection terminal 100 is inserted through the terminal avoidance hole 72, and when the stator structure 3 and the control box 6 are matched, both the stator structure 3 and the control box 6 are in extrusion contact with the first auxiliary seal part 701.

[0048] In this embodiment, for the seal of the connection terminal 100, the second seal 7 is designed with a first auxiliary seal part 701, on which a terminal avoidance hole 72 is provided, and the connection terminal 100 is inserted through the terminal avoidance hole 72. In this way, the separate seal of the connection terminal 100 is realized. Even if the seal body 71 fails, water cannot flow to the connection terminal 100, further improving the reliability of the canned motor pump.

[0049] Specifically, there are multiple connection terminals 100, and multiple connection terminals 100 are all inserted through the terminal avoidance hole 72; or, there are multiple connection terminals 100, there are multiple terminal avoidance holes 72, and multiple connection terminals 100 are inserted through multiple terminal avoidance holes 72 in one - to - one correspondence.

[0050] That is to say, when there are multiple connection terminals 100, there can be multiple sealing methods for the connection terminals 100. In an optional sealing method, multiple connection terminals 100 can be passed through the terminal avoidance holes 72 for unified sealing protection. In another optional sealing method, corresponding to multiple connection terminals 100, multiple terminal avoidance holes 72 are provided on the first auxiliary sealing portion 701, so that multiple connection terminals 100 are respectively passed through the corresponding terminal avoidance holes 72. In this way, individual sealing protection is achieved for each connection terminal 100. Even if a certain sealing structure fails and water enters, the connection terminals 100 will not be short-circuited, effectively improving the safety of the canned motor pump during use.

[0051] Specifically, a through hole is provided on the control box 6, and the through hole communicates the inside and outside of the control box 6. The connection terminal 100 is arranged through the through hole; the control box 6 includes a box body 62 and a box cover 63, the box cover 63 is detachably installed on the box body 62, and an accommodation cavity is formed between the box body 62 and the box cover 63. The electrical component 61 is located in the accommodation cavity; among them, the canned motor pump further includes a fourth seal 83, and the fourth seal 83 is located at the mating position between the box body 62 and the box cover 63, and both the box body 62 and the box cover 63 are in pressing contact with the fourth seal 83.

[0052] By providing the fourth seal 83, the mating gap between the box body 62 and the box cover 63 can be sealed, so as to isolate the accommodation cavity inside the control box 6 from the external space, prevent water or air from entering the inside of the control box 6, and thus damage the electrical component 61 inside the control box 6.

[0053] In addition, since the seal body 71 of the second seal 7 and the first auxiliary sealing portion 701 mentioned above can achieve the sealing effect on the connection terminal 100, water and air from the outside will not flow into the control box 6 through the through hole at the connection terminal 100, thus ensuring the effective isolation between the inside and the outside environment of the control box 6.

[0054] Specifically, the canned motor pump includes a first connector 201, at least a part of the first connector 201 is embedded in the injection molding layer 32, and the canned motor pump further includes a second connector, and the second connector cooperates with the first connector 201 to connect the stator structure 3 and the control box 6 through the first connector 201 and the second connector; among them, the second seal 7 includes a second auxiliary sealing portion 702, and a connector avoidance hole 73 is provided on the second auxiliary sealing portion 702, and the first connector 201 is passed through the connector avoidance hole 73. When the stator structure 3 and the control box 6 are mated, both the stator structure 3 and the control box 6 are in pressing contact with the second auxiliary sealing portion 702.

[0055] In actual implementation, the first auxiliary sealing portion 701 may be connected to the seal body 71, or the first auxiliary sealing portion 701 may not be connected to the seal body 71. Similarly, the second auxiliary sealing portion 702 may be connected to the seal body 71, or the second auxiliary sealing portion 702 may not be connected to the seal body 71. In a preferred embodiment, in order to reduce the number of components, achieve cost savings and facilitate assembly, the seal body 71, the first auxiliary sealing portion 701, and the second auxiliary sealing portion 702 are of an integral structure.

[0056] By embedding the first connecting member 201 in the injection molding layer 32 and then connecting the stator structure 3 to the control box 6 through the first connecting member 201 and the second connecting member, the structural strength at the connection between the stator structure 3 and the control box 6 is effectively improved, thereby ensuring the connection reliability between the stator structure 3 and the control box 6 and avoiding the situation where the connection reliability between the stator structure 3 and the control box 6 is poor due to insufficient injection molding strength of the stator structure 3. As described above, embedding the first connecting member 201 in the injection molding layer 32 is to improve the structural strength at the connection. In actual implementation, the specific forms of the first connecting member 201 and the second connecting member can be various as long as they can realize the connection between the stator structure 3 and the control box 6. In this embodiment, the first connecting member 201 is an insert nut, the second connecting member is a screw, and the control box 6 is provided with a second connecting member mounting hole 202. The screw is inserted into the second connecting member mounting hole 202 and connected to the insert nut, so as to connect the stator structure to the control box 6 through the fastening action between the screw and the insert nut. In a preferred embodiment, a protruding portion is provided on one side of the control box 6 facing the stator structure 3, and the position of the protruding portion corresponds to the position of the insert nut. When the stator structure 3 is connected to the control box 6, the protruding portion contacts the end face of the insert nut, so as to support the insert nut through the protruding portion, so that the fastening force is applied to the protruding portion and the insert nut, preventing the insert nut from being pulled out while suspended.

[0057] Specifically, the canned motor pump includes a third seal 82, and the third seal 82 is disposed between the pump head 1 and the shield 2 to seal the gap between the pump head 1 and the shield 2.

[0058] By designing the third seal 82, the gap between the pump head 1 and the shield 2 can be sealed, avoiding the water in the main chamber 13 flowing out through the gap between the pump head 1 and the shield 2 or the external air entering the main chamber 13 through the gap between the pump head 1 and the shield 2 due to the pressure difference during the operation of the canned motor pump, thereby ensuring the high efficiency of the canned motor pump operation.

[0059] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0060] The canned motor pump of the present utility model includes: a pump head 1, the pump head 1 having a first pump port 11 and a second pump port 12; a shield 2, a main chamber 13 being formed between the pump head 1 and the shield 2, and both the first pump port 11 and the second pump port 12 communicating with the main chamber 13; a stator structure 3, the stator structure 3 being provided with a rotor mounting hole 30, the stator structure 3 including a stator body 31 and an injection molding layer 32, the injection molding layer 32 wrapping at least part of the stator body 31, the stator body 31 including a stator core 311; a rotor structure 4, the rotor structure 4 being mounted in the rotor mounting hole 30, the shield 2 isolating the stator structure 3 and the rotor structure 4, the rotor structure 4 being located in the main chamber 13; an impeller 5, the impeller 5 being disposed in the main chamber 13, the rotor structure 4 being connected to the impeller 5; a first seal 81, at least part of the first seal 81 being disposed between the stator structure 3 and the shield 2, the first seal 81 preventing air from entering the rotor mounting hole 30 through the gap between the stator structure 3 and the shield 2. For the canned motor pump designed with such a structure, a first seal 81 is designed between the stator structure 3 and the shield 2, and the gap between the two can be sealed through the first seal 81, so that external air cannot enter the rotor mounting hole 30 through the gap between the stator structure 3 and the shield 2. Therefore, condensed water will not be formed in the rotor mounting hole 30, and the situation of the core of the stator body 31 being rusted due to the condensed water entering the rotor mounting hole 30 can be avoided, effectively prolonging the service life of the canned motor pump and solving the technical problem of the short service life of the canned motor pump in the related art.

[0061] For the sake of description, spatial relative terms, such as "above", "over", "on the upper surface", "above-mentioned", etc., may be used herein to describe the spatial position relationship of one device or feature with respect to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figure is inverted, the device described as "above" or "over" other devices or structures will then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be oriented in other different ways (rotated 90 degrees or at other orientations), and corresponding interpretations may be made to the spatial relative descriptions used herein.

[0062] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of the features, steps, operations, devices, components, and / or combinations thereof.

[0063] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that comprises a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0064] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A canned motor pump, characterized in that: include: A pump head (1), wherein the pump head (1) has a first pump port (11) and a second pump port (12); A shielding sleeve (2), wherein the pump head (1) and the shielding sleeve (2) enclose a main chamber (13), and the first pump port (11) and the second pump port (12) are both in communication with the main chamber (13); A stator structure (3), wherein a rotor mounting hole (30) is provided on the stator structure (3), the stator structure (3) comprises a stator body (31) and an injection molding layer (32), the injection molding layer (32) wraps at least a portion of the stator body (31), and the stator body (31) comprises a stator core (311); a rotor structure (4), the rotor structure (4) being mounted in the rotor mounting hole (30), the shielding sleeve (2) isolating the stator structure (3) and the rotor structure (4), and the rotor structure (4) being located in the main chamber (13); An impeller (5), the impeller (5) being disposed in the main chamber (13), and the rotor structure (4) being connected to the impeller (5); A first seal (81), at least a portion of which is disposed between the stator structure (3) and the shielding sleeve (2), and the first seal (81) prevents air from entering the rotor mounting hole (30) through a gap between the stator structure (3) and the shielding sleeve (2).

2. The canned motor pump according to claim 1, characterized in that: The stator core (311) is exposed and disposed at a position corresponding to the inner wall surface of the rotor mounting hole (30).

3. The canned motor pump according to claim 1, characterized in that: A sealing ring installation groove is provided at the inner corner of one end of the rotor installation hole (30) close to the pump head (1); the sealing ring installation groove is an annular incision arranged around the rotor installation hole (30); the first sealing member (81) is arranged in the sealing ring installation groove; the shielding sleeve (2) comprises a barrel body (21) and a flange portion (22) located at the barrel mouth; the flange portion (22) is folded toward the outside of the barrel body (21); the barrel body (21) and the flange portion (22) are both in extrusion contact with the first sealing member (81).

4. The canned motor pump according to claim 1, characterized in that: The rotor mounting hole (30) is arranged through the stator structure (3), and the canned motor pump further comprises: A control box (6), the control box (6) being arranged on a side of the stator structure (3) away from the pump head (1), the control box (6) being connected to the stator structure (3), an electrical component (61) being arranged inside the control box (6), and the electrical component (61) being electrically connected to the stator winding of the stator body (31); A second sealing member (7), wherein the second sealing member (7) is arranged between the stator structure (3) and the control box (6) to seal a gap between the stator structure (3) and the control box (6), wherein the second sealing member (7) is arranged around the rotor mounting hole (30).

5. The canned motor pump according to claim 4, characterized in that: The canned motor pump comprises a connection terminal (100), the stator winding and the electrical element (61) are both connected to the connection terminal (100), wherein the second seal (7) comprises a seal body (71), and the seal body (71) is arranged around the connection terminal (100).

6. The canned motor pump according to claim 5, characterized in that: The second sealing member (7) comprises a first auxiliary sealing portion (701), the sealing member body (71) is arranged around the first auxiliary sealing portion (701), the first auxiliary sealing portion (701) is provided with a terminal avoidance hole (72), the connecting terminal (100) is inserted into the terminal avoidance hole (72), and when the stator structure (3) and the control box (6) are matched, the stator structure (3) and the control box (6) are both in compression contact with the first auxiliary sealing portion (701).

7. The canned motor pump according to claim 6, characterized in that: There are a plurality of connection terminals (100), and the plurality of connection terminals (100) are all inserted into the terminal avoidance hole (72); or, There are a plurality of connection terminals (100), there are a plurality of terminal avoidance holes (72), and the plurality of connection terminals (100) are inserted into the plurality of terminal avoidance holes (72) in a one-to-one correspondence.

8. The canned motor pump according to claim 5, characterized in that: The control box (6) is provided with a through hole, the through hole connects the inner side and the outer side of the control box (6), and the connecting terminal (100) is arranged through the through hole; the control box (6) comprises a box body (62) and a box cover (63), the box cover (63) is detachably mounted on the box body (62), and a receiving cavity is formed between the box body (62) and the box cover (63), and the electrical component (61) is located in the receiving cavity; The canned pump further comprises a fourth sealing member (83), wherein the fourth sealing member (83) is located at a matching position between the box body (62) and the box cover (63), and the box body (62) and the box cover (63) are both in compression contact with the fourth sealing member (83).

9. The canned motor pump according to claim 4, characterized in that: The canned motor pump comprises a first connecting member (201), at least a portion of which is embedded in the injection molding layer (32); the canned motor pump further comprises a second connecting member, which cooperates with the first connecting member (201) to connect the stator structure (3) to the control box (6) via the first connecting member (201) and the second connecting member; The second sealing member (7) comprises a second auxiliary sealing portion (702), a connecting member avoidance hole (73) is provided on the second auxiliary sealing portion (702), the first connecting member (201) is inserted into the connecting member avoidance hole (73), and when the stator structure (3) and the control box (6) are matched, the stator structure (3) and the control box (6) are both in compression contact with the second auxiliary sealing portion (702).

10. The canned motor pump according to any one of claims 1 to 9, characterized in that: The shielded pump comprises a third sealing member (82), wherein the third sealing member (82) is arranged between the pump head (1) and the shielding sleeve (2) so as to seal the gap between the pump head (1) and the shielding sleeve (2).

Images