A canned motor pump

Abstract

The utility model discloses a shielding pump, including motor part and pump part, the motor part includes motor shell and shielding sleeve subassembly, one end of shielding sleeve subassembly sets up in the motor shell, and the end surface opposite with motor shell, the pump part includes pump body shell, and the pump body shell is fixedly connected with motor shell, the shielding pump still includes the annular support that sets up in the pump body shell, the outside wall of annular support is attached with the inner wall of pump body shell and is set up, and the inner wall of pump body shell forms the locating platform, along the axial direction of annular support, the annular support is clamped between the locating platform and motor shell, shielding sleeve subassembly is set up between annular support and motor shell, under the clamping force effect of locating platform and motor shell, the annular support will shielding sleeve subassembly and be pressed on motor shell, and sealedly be connected between with shielding sleeve subassembly. The utility model discloses have better sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of pump technology, and specifically to a shielded pump with better sealing performance. Background Technology

[0002] A canned motor pump is a pump that connects the pump and the motor together. The rotor of the motor and the impeller of the pump are fixed on the same shaft. The rotor and stator of the motor are separated by a shielding sleeve. The rotor rotates in the medium being transported, and its power is transmitted to the rotor through the stator magnetic field.

[0003] Compared to traditional centrifugal pumps, canned motor pumps have better leak-proof performance and are generally used to transport high-risk and valuable media.

[0004] In the case of existing canned motor pumps, leakage and deterioration of sealing performance are prone to occur during long-term use, which in turn affects the pump's head. Utility Model Content

[0005] This invention aims to address one of the technical problems in related technologies to a certain extent. Therefore, this invention provides a shielded pump with improved sealing performance.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a shielded pump, comprising a motor component and a pump component. The motor component includes a motor housing and a shielding sleeve assembly, one end of which is disposed inside the motor housing, and the other end of which faces the end face of the motor housing. The pump component includes a pump body housing, which is fixedly connected to the motor housing.

[0007] The shielded pump also includes an annular support member disposed inside the pump housing. The outer wall of the annular support member is fitted to the inner wall of the pump housing. A positioning platform is formed on the inner wall of the pump housing. Along the axial direction of the annular support member, the annular support member is sandwiched between the positioning platform and the motor housing.

[0008] The shielding sleeve assembly is disposed between the annular support and the motor housing. Under the clamping force of the positioning platform and the motor housing, the annular support presses the shielding sleeve assembly against the motor housing and seals it in connection with the shielding sleeve assembly.

[0009] In this technical solution, the motor housing and shielding cover assembly of the canned motor pump are fixed and sealed together by an annular support inside the pump housing. This avoids the problem of poor sealing effect caused by deformation of the annular support under external force during actual use, thus improving the sealing effect of the canned motor pump.

[0010] Furthermore, the annular support includes an annular body, a first clamping ring, and a second clamping ring. The outer wall of the annular body is fitted with the inner wall of the pump housing. The shielding sleeve assembly includes a shielding sleeve and a cover. The shielding sleeve includes a shielding cylinder and a shielding end plate. The shielding cylinder is disposed inside the motor housing, and the shielding end plate is disposed outside the shielding cylinder. The cover is disposed on the shielding cylinder. The first clamping ring and the second clamping ring are disposed on the end face of the annular body facing the motor housing. The first clamping ring is disposed outside the second clamping ring. The first clamping ring presses against the shielding end plate, and the second clamping ring presses against the end face of the cover.

[0011] Furthermore, the shielding end plate includes a first connecting ring, a first ring plate, an annular side plate, and a second ring plate arranged radially from the inside to the outside. The inner side of the first connecting ring is connected to the shielding cylinder. The first ring plate and the second ring plate are spaced apart along the axial direction. The first clamping ring protrudes from the second clamping ring along the axial direction. An annular groove is formed on the end face of the motor housing. The annular side plate and the second ring plate are disposed in the annular groove, and the inner wall of the annular side plate fits against the side wall of the annular groove. The first clamping ring extends into the annular groove and presses the second ring plate against the bottom wall of the annular groove. The inner wall of the first clamping ring is opposite to the outer wall of the annular side plate.

[0012] Furthermore, the cover includes a bearing mounting cylinder, a second connecting ring, and a third ring plate arranged radially from the inside to the outside. The second connecting ring is opposite to the first connecting ring, and the third ring plate is opposite to the first ring plate and spaced apart. The second pressing ring includes a second pressing part and a limiting part. The second pressing part is opposite to the third ring plate, and the limiting part protrudes from the surface of the second pressing part and is disposed on the outside of the third ring plate.

[0013] Furthermore, the shielded pump includes a first seal and a second seal. The first seal is disposed between the inner wall of the first clamping ring and the outer wall of the annular side plate, and the second seal is disposed between the third annular plate and the first annular plate.

[0014] Furthermore, the first clamping ring and the second clamping ring are spaced apart radially, and a plurality of radially arranged reinforcing strips are provided within the space. The plurality of reinforcing strips are circumferentially distributed, and the second reinforcing strip abuts against the second sealing element.

[0015] Furthermore, the motor component includes a stator assembly and a rotor assembly, and the pump component includes an impeller. The stator assembly is disposed in the cavity between the motor housing and the shielding sleeve assembly, and the rotor assembly is disposed within the shielding sleeve assembly. The rotor assembly's shaft extends out of the shielding sleeve assembly and is connected to the impeller. The shielding sleeve assembly has multiple liquid inlets circumferentially distributed around its axis, with the liquid inlets facing the back of the impeller. The center of the shaft has a through hole communicating with the inner cavity of the shielding sleeve assembly.

[0016] Furthermore, the shielded pump also includes an annular water outlet cover, which is disposed inside the pump body housing. One end of the water outlet cover abuts against the end face of the annular support member away from the motor housing, and the other end abuts against the positioning platform. The impeller is disposed between the water outlet cover and the annular support member, and a liquid inlet is formed at the center of the water outlet cover, which is opposite to the front of the impeller.

[0017] Furthermore, a sealing groove is formed on the outer wall of the annular support member, and the shielded pump also includes a third sealing member, which is disposed in the sealing groove and seals the inner wall of the annular support member and the pump body shell.

[0018] Furthermore, an annular boss is formed on the shielding sleeve assembly, and an annular limiting platform adapted to the annular boss is formed on the annular support member. The annular limiting platform is disposed on the outer side of the annular boss, and the inner wall of the annular limiting platform is fitted to the inner wall of the annular boss.

[0019] These features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. The preferred embodiments or means of this utility model will be shown in detail in conjunction with the accompanying drawings, but this is not intended to limit the technical solution of this utility model. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Figure 1 This is a side cross-sectional view of a shielded pump according to one embodiment of the present invention;

[0022] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is an exploded view of the shielded pump structure according to one embodiment of the present invention;

[0024] Figure 4 This is a structural diagram of the annular support member according to one embodiment of the present invention;

[0025] Figure 5 This is a side sectional view of the annular support member according to one embodiment of the present utility model;

[0026] Figure 6 This is a structural diagram of a shielding sleeve according to one embodiment of the present invention;

[0027] Figure 7 This is a structural diagram of the cover body according to one embodiment of the present utility model;

[0028] Figure 8 This is an overall external view of the shielded pump according to one embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the internal circulation of liquid in a shielded pump according to one embodiment of the present invention.

[0030] in,

[0031] 10. Motor components; 11. Stator assembly; 12. Rotor assembly;

[0032] 13. Motor housing; 131. Motor cylindrical housing; 132. Annular bracket; 133. Annular groove;

[0033] 14. Shielding sleeve assembly; 140. Shielding sleeve; 141. Shielding cylinder;

[0034] 142. Shielding end plate; 1421. First connecting ring; 1422. First ring plate; 1423. Annular side plate; 1424. Second ring plate;

[0035] 143. Cover; 1431. Bearing mounting sleeve; 1432. Second connecting ring; 1433. Third ring plate; 1434. Liquid inlet;

[0036] 20. Pump components; 21. Pump housing; 211. Positioning platform; 22. Impeller; 23. Outlet cover;

[0037] 30. Annular support; 31. Annular body; 311. Sealing groove; 32. First clamping ring; 33. Second clamping ring; 331. Second clamping part; 332. Limiting part; 34. Reinforcing strip; 35. Annular limiting platform; 41. First sealing element; 42. Second sealing element; 43. Third sealing element. Detailed Implementation

[0038] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this utility model and should not be construed as limiting it.

[0039] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this utility model. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0040] As one embodiment of this utility model, see the appendix. Figure 1 , 2 9. A canned motor pump is disclosed, comprising a motor component 10 and a pump component 20. The motor component 10 includes a stator assembly 11, a rotor assembly 12, a motor housing 13, and a shielding sleeve assembly 14. One end of the shielding sleeve assembly 14 is disposed inside the motor housing 13, and the other end faces the end face of the motor housing 13. The stator assembly 11 is disposed in the cavity between the motor housing 13 and the shielding sleeve assembly 14. The rotor assembly 12 is disposed inside the shielding sleeve assembly 14, and the shaft of the rotor assembly 12 extends out of the shielding sleeve assembly 14. The pump component 20 includes a pump body housing 21 and an impeller 22. The pump body housing 21 is fixedly connected to the motor housing 13, and one end of the shaft extending out of the shielding sleeve assembly 14 is connected to the impeller 22.

[0041] The shielded pump also includes an annular support member 30 disposed inside the pump body shell 21. The outer side wall of the annular support member 30 is fitted to the inner wall of the pump body shell 21. A positioning platform 211 is formed on the inner wall of the pump body shell 21. Along the axial direction of the annular support member 30, the annular support member 30 is sandwiched between the positioning platform 211 and the motor shell 13.

[0042] The shielding sleeve assembly 14 is disposed between the annular support 30 and the motor housing 13. Under the clamping force of the positioning platform 211 and the motor housing 13, the annular support 30 presses the shielding sleeve assembly 14 onto the motor housing 13 and seals it in connection with the shielding sleeve assembly 14.

[0043] In this embodiment, the stator assembly 11 and rotor assembly 12 of the shielded pump are respectively arranged in two mutually isolated cavities, wherein the rotor assembly 12 is arranged inside the shielding sleeve assembly 14, which can ensure better sealing performance during use.

[0044] In this embodiment, the motor housing 13 and the pump body housing 21 of the shielded pump are generally fixedly connected by bolts. In actual installation, multiple bolts are generally set in the circumferential direction for connection to ensure the stability of the connection.

[0045] In this embodiment, the pump housing 21 has an inlet and an outlet, enabling the canned pump to transport and circulate liquid.

[0046] The canned pump in this embodiment includes an annular support 30 disposed inside the pump housing 21. Under the threaded locking force of the motor housing 13 and the pump housing 21, the positioning table 211 presses the annular support 30 and presses the shielding sleeve assembly 14 onto the motor housing. Compared with the structure in the related technology where the pump housing 21 directly presses the shielding sleeve assembly 14, the canned pump in this embodiment adds a built-in intermediate component (annular support 30). In the related technology, the structure in which the pump housing 21 directly presses the shielding sleeve assembly 14 is prone to deformation under the action of external force during actual use. The deformation of the pump housing 21 will cause uneven force on the shielding sleeve assembly 14, and in severe cases, it may even be unable to press the shielding sleeve assembly 14, which will cause sealing failure and affect the normal operation of the canned pump.

[0047] In this embodiment, the annular support 30 can prevent deformation caused by external forces during use. The pump body shell 21 is transmitted to the shielding sleeve assembly 14 through the annular support 30. In actual use, even if the pump body shell 21 undergoes certain deformation under external forces, the annular support 30 can still provide a relatively stable top pressure to the shielding sleeve assembly 14, ensuring the reliability of the seal and improving the leakage prevention capability of the shielded pump. (It should be noted that the leakage prevention capability of the shielded pump mentioned in this embodiment generally refers to the sealing effect of the rotor assembly 12 inside the shielding sleeve assembly 14. The better the sealing effect of the shielding sleeve assembly 14, the stronger the leakage prevention capability.)

[0048] In addition, the outer wall of the annular support 30 in this embodiment is fitted to the inner wall of the pump housing 21, which provides support for the inner wall of the pump housing 21 and increases the pressure-bearing capacity of the pump housing 21, thus better avoiding deformation that may occur during use.

[0049] This embodiment does not specifically limit the structure of the annular support 30. In actual installation, it can be designed according to the adaptability of the component structure of the canned pump, as long as it is inside the pump body shell 21 or the motor shell 13 and can directly press the shielding sleeve assembly 14 and press the shielding sleeve assembly 14 and the motor shell 13 together.

[0050] In this embodiment, the sealing position and sealing form of the shielding sleeve assembly 14 and the annular support 30 are not specifically limited. In actual settings, they can be set as axial seals or radial seals, or a combination of axial seals and radial seals.

[0051] As one embodiment of this utility model, see the appendix. Figure 2 , 4 The annular support 30 includes an annular body 31, a first clamping ring 32, and a second clamping ring 33. The outer wall of the annular body 31 is fitted with the inner wall of the pump housing 21. The shielding sleeve assembly 14 includes a shielding sleeve 140 and a cover 143. The shielding sleeve 140 includes a shielding cylinder 141 and a shielding end plate 142. The shielding cylinder 141 is disposed inside the motor housing 13, and the shielding end plate 142 is disposed outside the shielding cylinder 141. The cover 143 covers the shielding cylinder 141. The first clamping ring 32 and the second clamping ring 33 are disposed on the end face of the annular body 31 facing the motor housing 13. The first clamping ring 32 is disposed outside the second clamping ring 33. The first clamping ring 32 presses against the shielding end plate 142, and the second clamping ring 33 presses against the end face of the cover 143.

[0052] The shielding sleeve assembly 14 in this embodiment includes a shielding sleeve 140 and a cover 143. The shielding sleeve 140 has a structure with one end open and the other end closed. The shielding sleeve 140 includes a shielding cylinder 141 and a shielding end plate 142. The shielding cylinder 141 is disposed inside the motor housing 13, and the shielding end plate 142 is pressed against the end of the motor housing 13 to seal the end of the motor housing 13, thereby forming a sealed installation space for the stator assembly 11. The cover 143 is placed on the end face of the shielding sleeve 140 to seal the end of the shielding sleeve 140, thereby forming a sealed installation space for the rotor assembly 12.

[0053] The separate design of the shielding sleeve 140 and the cover 143 facilitates the installation of the rotor assembly 12 inside the shielding sleeve 141.

[0054] The annular support 30 in this embodiment includes a first clamping ring 32 and a second clamping ring 33, wherein the first clamping ring 32 and the second clamping ring 33 are arranged inside and outside the other. This allows the first clamping ring 32 and the second clamping ring 33 to apply top pressure to the shielding end plate 142 and the cover 143 respectively. The top pressure applied by the second clamping ring 33 to the cover 143 can further press the shielding sleeve 140 onto the motor housing 13, thereby achieving a larger top pressure area between the shielding sleeve 140 and the motor housing 13, and improving the stability of the shielding sleeve 140 and the motor housing 13.

[0055] As one embodiment of this utility model, see the appendix. Figure 6The shielding end plate 142 includes a first connecting ring 1421, a first ring plate 1422, an annular side plate 1423, and a second ring plate 1424 arranged radially from the inside to the outside. The inner side of the first connecting ring 1421 is connected to the shielding cylinder 141. The first ring plate 1422 and the second ring plate 1424 are spaced apart along the axial direction. The first pressing ring 32 protrudes from the second pressing ring 33 along the axial direction. An annular groove 133 is formed on the end face of the motor housing 13. The annular side plate 1423 and the second ring plate 1424 are disposed in the annular groove 133, and the inner wall of the annular side plate 1423 is in contact with the side wall of the annular groove 133. The first pressing ring 32 extends into the annular groove 133 and presses the second ring plate 1424 onto the bottom wall of the annular groove 133. The inner wall of the first pressing ring 32 is opposite to the outer wall of the annular side plate 1423.

[0056] In this embodiment, the shielding sleeve 140 is formed into a T-shaped structure, which facilitates installation and creates an installation space for the rotor assembly 12.

[0057] In this embodiment, an annular groove 133 is formed on the end face of the motor housing 13. The first clamping ring 32, the annular side plate 1423 and the second annular plate 1424 all extend into the annular groove 133. The annular groove 133 can limit the position of the annular support 30, which is convenient for installation, and can also ensure the coaxiality of the annular support 30 and the motor housing 13 during installation.

[0058] Furthermore, the design of the annular groove 133, the first clamping ring 32, the annular side plate 1423, and the second annular plate 1424 can increase the contact area between the shielding sleeve 140 and the motor housing 13 and the annular support 30 (for example, by increasing the contact area between the annular side plate 1423 and the side of the annular groove 133), as shown in the attached figure. Figure 2 As shown, this can improve the stability of the installation and also help with sealing.

[0059] It should be noted that the motor housing 13 in this utility model is not necessarily a single component, but can be formed by assembling multiple components. For example, the motor housing 13 in this embodiment may include two parts, namely the motor cylindrical housing 131 and the annular bracket 132. The annular bracket 132 and the motor cylindrical housing 131 are fixedly connected. In this way, the annular bracket 132 and the motor cylindrical housing 131 can be made of different materials and structures, which is convenient for processing.

[0060] Furthermore, the annular bracket 132 can be configured to have an annular groove 133 that is easier to process and a structure with higher strength, which facilitates its fixed connection with the pump housing 21 and the shielding sleeve assembly 14.

[0061] As one embodiment of this utility model, see the appendix. Figure 7The cover 143 includes a bearing mounting cylinder 1431, a second connecting ring 1432, and a third ring plate 1433 arranged radially from the inside to the outside. The second connecting ring 1432 is opposite to the first connecting ring 1421, and the third ring plate 1433 is opposite to the first ring plate 1422 and spaced apart. The second pressing ring 33 includes a second pressing part 331 and a limiting part 332. The second pressing part 331 is opposite to the third ring plate 1433, and the limiting part 332 protrudes from the surface of the second pressing part 331 and is disposed on the outside of the third ring plate 1433.

[0062] In this embodiment, the bearing mounting sleeve 1431 is used to install the rotation support (such as a bearing) of the rotating shaft. The first connecting ring 1421 and the second connecting ring 1432 mainly serve as a connection. They can be set as concave and convex structures with matching shapes to increase the structural strength of the cover 143 and the shielding sleeve 140. On the other hand, it can make the fit between the cover 143 and the shielding sleeve end plate more stable and achieve better sealing.

[0063] In this embodiment, the second pressing part 331 presses against the cover 143 through a surface fit, which increases the pressing area and makes the force more stable. The limiting part 332 can limit the radial relative position of the annular support 30 and the cover 143, ensuring the stability of the assembly.

[0064] The third ring plate 1433 is positioned opposite and spaced apart from the first ring plate 1422, which facilitates the installation of a sealing structure between them.

[0065] As one embodiment of this example, see Appendix Figure 2 The shielded pump includes a first seal 41 and a second seal 42. The first seal 41 is disposed between the inner wall of the first clamping ring 32 and the outer wall of the annular side plate 1423, and the second seal 42 is disposed between the third annular plate 1433 and the first annular plate 1422.

[0066] In this embodiment, the first sealing element 41 achieves radial sealing, and the second sealing element 42 achieves end face sealing. The combination of the spaced radial and axial seals achieves a dual sealing effect, ensuring a better sealing effect for the shielding sleeve assembly 14.

[0067] As one embodiment of this utility model, see the appendix. Figure 5 The first clamping ring 32 and the second clamping ring 33 are spaced apart radially, and a plurality of radially arranged reinforcing strips 34 are provided in the space. The plurality of reinforcing strips 34 are circumferentially distributed and abut against the second sealing member 42.

[0068] The spacing between the first clamping ring 32 and the second clamping ring 33 in this embodiment can improve the clamping effect of the annular support 30 on the shielding sleeve assembly 14. The design of the reinforcing strip 34 can improve the structural strength of the annular support 30. Moreover, both the reinforcing strip 34 and the third ring plate 1433 can press on the second sealing member 42. That is, the second sealing member 42 has a large radial width, which can increase the sealing area and improve the sealing effect.

[0069] As one embodiment of this utility model, see the appendix. Figure 7 The shielding sleeve assembly 14 has a plurality of liquid inlets 1434 circumferentially distributed around the axis of the shielding sleeve assembly 14. The liquid inlets 1434 are opposite to the back of the impeller 22 so that the liquid can flow into the shielding sleeve assembly 14 through the liquid inlets 1434 under the rotation of the impeller 22. The center of the rotating shaft is provided with a through hole so that the liquid entering the shielding sleeve can flow out of the shielding sleeve assembly 14 from the end of the rotating shaft where the impeller 22 is installed.

[0070] In this embodiment, when the canned pump is in use, under the centrifugal force of the rotating impeller 22, a portion of the pumped liquid enters the shielding sleeve assembly 14 from the back of the impeller 22 through the liquid inlet 1434. The liquid inside the shielding sleeve assembly 14 flows through the rotor assembly 12 and then enters the through hole in the center of the shaft from the tail end of the shaft (the end away from the impeller 22), and flows out from the head end of the shaft, forming a liquid flow cycle. In this way, a portion of the normally pumped liquid acts as a cooling medium to cool the rotor assembly 12, preventing overheating.

[0071] In this embodiment, the liquid inlet 1434 is generally located at the position of the second connecting ring 1432. In actual installation, a flat plate structure can be set on the second connecting ring 1432, and the liquid inlet 1434 is opened on the plane, which is convenient for processing.

[0072] In addition, the circumferential distribution of multiple liquid inlets 1434 allows the liquid to enter the shielding sleeve assembly 14 evenly in the circumferential direction, and increases the liquid inlet area. This can reduce the impact of the liquid flow on the cover 143 and the uniformity of the pressure on the cover 143, and reduce the deformation of the cover 143.

[0073] As one embodiment of this utility model, see the appendix. Figure 1 , 3 The shielded pump also includes an annular outlet cover 23, which is disposed inside the pump body housing 21. One end of the outlet cover 23 abuts against the end face of the annular support 30 away from the motor housing 13, and the other end abuts against the positioning platform 211. The impeller 22 is disposed between the outlet cover 23 and the annular support 30. A liquid inlet is formed at the center of the outlet cover 23, which is opposite to the front of the impeller 22.

[0074] In this embodiment, the water outlet cover 23 is also an internal structure. During use, the pressure of the positioning platform 211 on the pump body shell 21 is transmitted to the shielding sleeve assembly 14 through the water outlet cover 23 and the annular support 30.

[0075] In this embodiment, the water outlet cover 23 and the annular support 30 together form an installation space. The impeller 22 is set in this installation space, which can provide a more stable installation space for the impeller 22 and avoid the impact of pressure deformation of the pump body shell 21 on the impeller 22, making the movement of the impeller 22 more stable.

[0076] As one embodiment of this example, see Appendix Figure 5 A sealing groove 311 is formed on the outer side wall of the annular support 30. The shielded pump also includes a third sealing member 43, which is disposed in the sealing groove 311 and seals the inner wall of the annular support 30 and the pump body shell 21.

[0077] In one embodiment of this utility model, an annular boss is formed on the shielding sleeve assembly 14, and an annular limiting platform 35 adapted to the annular boss is formed on the annular support member 30. The annular limiting platform 35 is disposed on the outside of the annular boss, and the inner wall of the annular limiting platform 35 is fitted to the inner wall of the annular boss (generally, the gap between the two is not greater than 0.1).

[0078] The fitting clearance between the annular limiting platform 35 and the annular boss defined in this embodiment is intended to ensure the coaxiality of the annular support 30 with the pump housing 21 and the shielding sleeve assembly 14, and to avoid friction between the inlet end of the impeller 22 and the outlet cover 23 during use. In actual installation, the annular limiting platform 35 in this embodiment can be formed by the second clamping ring 33, and the annular boss can be formed on the second connecting ring 1432 and the first connecting ring 1421.

[0079] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A shielded pump, comprising a motor component (10) and a pump component (20), wherein the motor component (10) includes a motor housing (13) and a shielding sleeve assembly (14), one end of the shielding sleeve assembly (14) is disposed inside the motor housing (13), and the other end is opposite to the end face of the motor housing (13); the pump component (20) includes a pump body housing (21), the pump body housing (21) being fixedly connected to the motor housing (13), characterized in that, The shielded pump also includes an annular support member (30) disposed inside the pump body shell (21). The outer side wall of the annular support member (30) is fitted to the inner wall of the pump body shell (21). A positioning platform (211) is formed on the inner wall of the pump body shell (21). Along the axial direction of the annular support member (30), the annular support member (30) is sandwiched between the positioning platform (211) and the motor shell (13). The shielding sleeve assembly (14) is disposed between the annular support (30) and the motor housing (13). Under the clamping force of the positioning platform (211) and the motor housing (13), the annular support (30) presses the shielding sleeve assembly (14) against the motor housing (13) and seals it in connection with the shielding sleeve assembly (14).

2. The shielded pump according to claim 1, characterized in that, The annular support (30) includes an annular body (31), a first clamping ring (32), and a second clamping ring (33). The outer wall of the annular body (31) is fitted to the inner wall of the pump housing (21). The shielding sleeve assembly (14) includes a shielding sleeve (140) and a cover (143). The shielding sleeve (140) includes a shielding cylinder (141) and a shielding end plate (142). The shielding cylinder (141) is disposed inside the motor housing (13), and the shielding end plate (142) is disposed inside the motor housing (13). Outside the shielding cylinder (141), the cover (143) is placed on the shielding cylinder (141). The first clamping ring (32) and the second clamping ring (33) are disposed on the end face of the annular body (31) facing the motor housing (13). The first clamping ring (32) is disposed outside the second clamping ring (33). The first clamping ring (32) presses against the shielding end plate (142), and the second clamping ring (33) presses against the end face of the cover (143).

3. The shielded pump according to claim 2, characterized in that, The shielding end plate (142) includes a first connecting ring (1421), a first ring plate (1422), an annular side plate (1423), and a second ring plate (1424) arranged radially from the inside to the outside. The inner side of the first connecting ring (1421) is connected to the shielding cylinder (141). The first ring plate (1422) and the second ring plate (1424) are spaced apart along the axial direction. The first clamping ring (32) protrudes from the second clamping ring (33) along the axial direction. The motor housing (1423) 3) An annular groove (133) is formed on the end face. The annular side plate (1423) and the second annular plate (1424) are disposed in the annular groove (133). The inner wall of the annular side plate (1423) is in contact with the side wall of the annular groove (133). The first pressing ring (32) extends into the annular groove (133) and presses the second annular plate (1424) onto the bottom wall of the annular groove (133). The inner wall of the first pressing ring (32) is opposite to the outer wall of the annular side plate (1423).

4. The shielded pump according to claim 3, characterized in that, The cover (143) includes a bearing mounting cylinder (1431), a second connecting ring (1432), and a third ring plate (1433) arranged radially from the inside to the outside. The bearing mounting cylinder (1431) is used to install the support bearing of the rotating shaft. The second connecting ring (1432) is opposite to the first connecting ring (1421). The third ring plate (1433) is opposite to the first ring plate (1422) and spaced apart. The second pressing ring (33) includes a second pressing part (331) and a limiting part (332). The second pressing part (331) is opposite to the third ring plate (1433). The limiting part (332) protrudes from the surface of the second pressing part (331) and is disposed on the outside of the third ring plate (1433).

5. The shielded pump according to claim 4, characterized in that, The shielded pump includes a first seal (41) and a second seal (42). The first seal (41) is disposed between the inner wall of the first clamping ring (32) and the outer wall of the annular side plate (1423). The second seal (42) is disposed between the third annular plate (1433) and the first annular plate (1422).

6. The shielded pump according to claim 5, characterized in that, The first clamping ring (32) and the second clamping ring (33) are spaced apart radially, and a plurality of radially arranged reinforcing strips (34) are provided in the space. The plurality of reinforcing strips (34) are circumferentially distributed, and the second reinforcing strip (34) abuts against the second seal (42).

7. The canned pump according to any one of claims 1 to 6, characterized in that, The motor component (10) includes a stator assembly (11) and a rotor assembly (12). The pump component (20) includes an impeller (22). The stator assembly (11) is disposed in the cavity between the motor housing (13) and the shielding sleeve assembly (14). The rotor assembly (12) is disposed in the shielding sleeve assembly (14). The shaft of the rotor assembly (12) extends out of the shielding sleeve assembly (14) and is connected to the impeller (22). The shielding sleeve assembly (14) has a plurality of liquid inlets (1434) circumferentially distributed around the axis of the shielding sleeve assembly (14). The liquid inlets (1434) are opposite to the back of the impeller (22). The center of the shaft has a through hole that communicates with the inner cavity of the shielding sleeve assembly (14).

8. The shielded pump according to claim 7, characterized in that, The pump component (20) also includes an annular water outlet cover (23), which is disposed inside the pump housing (21). One end of the water outlet cover (23) abuts against the end face of the annular support member (30) away from the motor housing (13), and the other end abuts against the positioning platform (211). The impeller (22) is disposed between the water outlet cover (23) and the annular support member (30). A liquid inlet is formed at the center of the water outlet cover (23) that faces the front of the impeller (22).

9. The canned pump according to any one of claims 1 to 6, characterized in that, A sealing groove (311) is formed on the outer side wall of the annular support (30). The shielded pump also includes a third sealing element (43), which is disposed in the sealing groove (311) and seals the inner wall of the annular support (30) and the pump body shell (21).

10. The canned pump according to any one of claims 1 to 6, characterized in that, The shielding sleeve assembly (14) has an annular boss, and the annular support member (30) has an annular limiting platform (35) adapted to the annular boss. The annular limiting platform (35) is disposed on the outside of the annular boss, and the inner wall of the annular limiting platform (35) is fitted to the inner wall of the annular boss.

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