Motor shielding structure, motor and shield pump

Abstract

The utility model discloses a motor shielding structure, a motor and a shield pump. The motor shielding structure is used for the shielding pump, the motor shielding structure comprises a rotor, a shielding sleeve assembly and a bracket cover assembly, the shielding sleeve assembly comprises a shielding sleeve and a first bearing, the shielding sleeve forms a mounting cavity with an opening in one end, and the first bearing is arranged in the mounting cavity in a sleeved mode; the bracket cover assembly comprises a bracket cover, a bearing support and a second bearing, a mounting part is formed on the bracket cover, a mounting hole is formed in the mounting part, the second bearing is embedded in the mounting hole through the bearing support, the bracket cover covers the opening of the shielding sleeve, and the mounting part is in sealed connection with the shielding sleeve; the rotor is fixedly installed between the first bearing and the second bearing, and one end of the rotor penetrates out of the second bearing. The stator mounting chamber and the rotor mounting chamber of the motor are isolated from each other by arranging the bracket cover assembly located at the opening of the shielding sleeve and the motor shell, the shielding effect is good, and disassembly and assembly are convenient.

Description

Technical Field

[0001] This utility model relates to the field of pumping device technology, specifically to a motor shielding structure, a motor, and a shielded pump. Background Technology

[0002] A canned motor pump is a seal-free pump used to transport liquids. The pump body and motor are sealed, and the shielding structure isolates the internal components of the motor stator and rotor from the transported medium to prevent leakage.

[0003] Existing canned motor pumps typically employ one of two shielding structures. The first is to seal the motor by using a shielding sleeve assembly and sealing gaskets or other sealing components on the contact surface between the pump body and the motor. The drawback of this shielding structure is that it is inconvenient to disassemble and assemble. The second is to achieve a sealing effect by welding at the point where sealing is required. The drawback of this shielding structure is that the internal parts cannot be disassembled for cleaning after molding.

[0004] Therefore, it is essential to design a shielding structure that is easy to assemble and disassemble and has a good sealing effect. Utility Model Content

[0005] To address the aforementioned deficiencies in the prior art, this application provides a motor shielding structure, a motor, and a shielded pump. The motor shielding structure is easy to assemble and disassemble and has a good sealing effect.

[0006] Firstly, in order to achieve the above-mentioned objectives, this utility model adopts the following technical solution:

[0007] A motor shielding structure for a shielded pump, the motor shielding structure including a rotor, a shielding sleeve assembly and a bracket cover assembly, the shielding sleeve assembly including a shielding sleeve and a first bearing, the shielding sleeve forming an installation chamber with an opening at one end, and the first bearing being sleeved in the installation chamber;

[0008] The bracket cover assembly includes a bracket cover, a bearing bracket, and a second bearing. The bracket cover has a mounting portion with a mounting hole. The second bearing is embedded in the mounting hole through the bearing bracket. The bracket cover covers the opening of the shielding sleeve, and the mounting portion and the shielding sleeve are sealed together.

[0009] The first bearing and the second bearing are coaxially arranged, the rotor is fixedly installed between the first bearing and the second bearing, and one end of the rotor extends out of the second bearing.

[0010] In this technical solution, by setting a shielding sleeve with only one end open and placing the rotor inside the shielding sleeve, the rotor and stator of the motor are located in different chambers. By setting a bracket cover assembly at the opening of the shielding sleeve and the motor housing, the stator mounting chamber and the rotor mounting chamber of the motor are isolated from each other, preventing the liquid medium in the pump body from flowing into the stator mounting chamber. The shielding effect is good, and only two sealing connections are required between the bracket cover, the shielding sleeve assembly, and the motor housing, which is convenient for disassembly and assembly.

[0011] Preferably, the canned motor pump includes a motor and a pump body. The mounting portion is a hollow tube extending towards the shielding sleeve. The mounting portion is embedded in the opening of the shielding sleeve, and the outer wall of the hollow tube is tightly fitted with the inner wall of the shielding sleeve. The outer edge of the bracket cover is sealingly connected between the motor and the pump body of the canned motor pump. The tight fit between the outer wall of the hollow tube and the inner wall of the shielding sleeve achieves a seal between the shielding sleeve and the motor housing. The sealing connection between the outer edge of the bracket cover and the motor and the pump body achieves a seal between the motor stator and the pump body. These two seals prevent liquid media inside the pump body and the shielding sleeve from flowing into the stator mounting cavity of the motor.

[0012] Preferably, a first sealing ring is further provided between the mounting part and the shielding sleeve. This further improves the sealing effect and prevents the liquid medium inside the shielding sleeve from flowing into the motor.

[0013] Preferably, the shielding sleeve is cylindrical, with an interference fit between the first bearing and the shielding sleeve, and a gap between the first bearing and the inner bottom wall of the shielding sleeve. This interference fit and press-fitting of the first bearing and the shielding sleeve into a single unit facilitates installation.

[0014] Preferably, the bearing bracket is provided with a plurality of guide grooves or guide holes arranged in the axial direction to allow the liquid medium to flow into the shielding sleeve.

[0015] Preferably, the rotor includes a shaft with an axially oriented through hole connecting both ends of the shaft. A filter is also disposed within the through hole. A liquid flow channel is also provided within the shaft, allowing the liquid medium to circulate within the shielding sleeve.

[0016] Preferably, the shielding sleeve and the mounting portion of the bracket cover are welded together. This improves the sealing effect and connection strength.

[0017] Secondly, to achieve the aforementioned objectives, this utility model also proposes an electric motor, including a housing, a stator, an impeller, and a motor shielding structure. The motor shielding structure is configured as described in any of the above technical solutions. The stator and the motor shielding structure are fixedly installed within the housing, and the impeller is fixedly connected to the rotor. The reasoning process for the beneficial effects of the electric motor provided in this application and the aforementioned motor shielding structure is similar and will not be repeated here.

[0018] Thirdly, to achieve the aforementioned objectives, this utility model also proposes a shielded pump, comprising a motor and a pump body, wherein the motor is fixedly connected to the pump body, and the impeller is located within the pump body. The motor is characterized by being configured as described in the above technical solution, and the bracket cover is sealingly connected between the housing and the pump body. The reasoning process for the beneficial effects of the shielded pump provided in this application are similar to that of the aforementioned motor shielding structure, and will not be repeated here.

[0019] Preferably, a second sealing ring is provided at the connection between the bracket cover and the housing and / or the pump body.

[0020] 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 are not intended to limit the technical solutions of this invention. 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

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] Figure 1 This is a perspective view of the motor shielding structure in this embodiment;

[0023] Figure 2 This is an exploded view of the motor shielding structure in this embodiment;

[0024] Figure 3 This is a cross-sectional view of the motor shielding structure in this embodiment;

[0025] Figure 4 This is a cross-sectional view of the motor in this embodiment;

[0026] Figure 5 This is a front view of the shielded pump in this embodiment;

[0027] Figure 6 This is a cross-sectional view of the shielded pump in this embodiment.

[0028] Among them, 100 is the shielding sleeve assembly; 110 is the shielding sleeve; 120 is the first bearing; 200 is the bracket cover assembly; 210 is the bracket cover; 211 is the mounting part; 2111 is the mounting hole; 220 is the second bearing; 230 is the bearing bracket; 231 is the guide groove; 300 is the rotor; 310 is the rotating shaft; 311 is the through hole; 320 is the filter; 401 is the first sealing ring; 402 is the second sealing ring; 510 is the housing; 520 is the stator; 530 is the impeller; and 600 is the pump body. Detailed Implementation

[0029] 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 the invention and should not be construed as limiting the scope of this utility model.

[0030] 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 patent. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0031] Example:

[0032] like Figures 1 to 3 As shown, a motor shielding structure is used for a shielded pump. The motor shielding structure includes a rotor 300, a shielding sleeve assembly 100, and a bracket cover assembly 200. The shielding sleeve assembly 100 includes a shielding sleeve 110 and a first bearing 120. The shielding sleeve 110 forms an installation chamber with an opening at one end, and the first bearing 120 is sleeved in the installation chamber.

[0033] The bracket cover assembly 200 includes a bracket cover 210, a bearing bracket 230, and a second bearing 220. The bracket cover 210 has a mounting portion 211 and a mounting hole 2111. The second bearing 220 is embedded in the mounting hole 2111 through the bearing bracket 230. The bracket cover 210 covers the opening of the shielding sleeve 110, and the mounting portion 211 and the shielding sleeve 110 are sealed together.

[0034] The first bearing 120 and the second bearing 220 are coaxially arranged, and the rotor 300 is fixedly installed between the first bearing 120 and the second bearing 220, with one end of the rotor 300 passing through the second bearing 220.

[0035] In this embodiment, by setting a shielding sleeve 110 with only one end open and placing the rotor 300 inside the shielding sleeve 110, the rotor 300 and stator 520 of the motor are located in different chambers. By setting a bracket cover assembly 200 at the opening of the shielding sleeve 110 and the motor housing 510, the stator 520 mounting chamber and the rotor 300 mounting chamber of the motor are isolated from each other, preventing the liquid medium in the pump body and the shielding sleeve 110 from flowing into the mounting chamber of the stator 520. The shielding effect is good, and only two sealing connections are needed between the bracket cover 210 and the shielding sleeve assembly 100 and the motor housing 510, which is convenient for disassembly and assembly.

[0036] In some embodiments, such as Figure 3 As shown, the canned motor pump includes a motor and a pump body. The bracket cover 210 is formed by stretching and machining a metal sheet. The mounting part 211 is a hollow tube extending towards the shielding sleeve 110. The mounting part 211 and the bracket cover 210 body are integrally formed. The mounting part 211 is embedded in the opening of the shielding sleeve 110, and the outer wall of the hollow tube is tightly fitted with the inner wall of the shielding sleeve 110. The outer edge of the bracket cover 210 is sealed between the motor and the pump body of the canned motor pump. The tight fit between the outer wall of the hollow tube and the inner wall of the shielding sleeve 110 achieves a seal between the shielding sleeve 110 and the motor housing 510. The sealing connection between the outer edge of the bracket cover 210 and the motor and pump body achieves a seal between the housing 510 (excluding the shielding sleeve assembly 100) and the pump body. These two seals prevent the liquid medium in the pump body and the shielding sleeve 110 from flowing into the stator 520 mounting cavity of the motor.

[0037] In some embodiments, such as Figure 3 As shown, a first sealing ring 401 is also provided between the mounting part 211 and the shielding sleeve 110. By providing a sealing ring between the mounting part 211 and the shielding sleeve 110, the sealing effect is further improved, preventing the liquid medium in the shielding sleeve 110 from flowing into the motor through the gap between the outer wall of the mounting part 211 and the inner wall of the shielding sleeve 110.

[0038] In some embodiments, such as Figure 2As shown, the shielding sleeve 110 is cylindrical, and the first bearing 120 is interference-fitted with the shielding sleeve 110, with a gap between the first bearing 120 and the inner bottom wall of the shielding sleeve 110. The interference fit and press-fitting of the first bearing 120 and the shielding sleeve 110 into a single unit reduces the difficulty of disassembly and assembly. By creating a gap between the first bearing 120 and the inner bottom wall of the shielding sleeve 110, and by providing a through hole 311 in the rotating shaft 310, the liquid medium in the pump body flows into the bottom of the shielding sleeve 110 through the through hole 311 of the rotating shaft 310. The liquid medium at the bottom of the shielding sleeve 110 then flows from the outside of the rotor 300 to the pump body through the first bearing 120, thus circulating the liquid medium within the shielding sleeve 110.

[0039] In some embodiments, such as Figure 2 As shown, the bearing bracket 230 is provided with a plurality of liquid flow grooves or liquid flow holes arranged in the axial direction to allow the liquid medium to flow into the shielding sleeve 110. In this embodiment, the liquid flow grooves are provided on the outer side wall of the bearing bracket 230. In other embodiments, they can also be provided as liquid flow channels that pass through the bearing bracket 230 or the second bearing 220 in the axial direction, such as liquid flow grooves, liquid flow holes or other structures, so that the liquid medium in the pump body can flow into the shielding sleeve assembly 100 through the bracket cover assembly 200.

[0040] In some embodiments, such as Figure 3 As shown, the rotor 300 includes a shaft 310, within which an axially oriented through hole 311 is provided, connecting both ends of the shaft 310. A filter 320 is also provided within the through hole 311. The through hole 311 within the shaft 310 allows liquid to flow from the shielding sleeve 110 along the through hole 311 to the pump body, forming an internal circulation with the liquid flow channel flowing from the pump body along the liquid flow groove of the bearing bracket 230 into the shielding sleeve 110. This internal circulation of the liquid medium within the shielding sleeve 110 reduces the motor temperature, ensuring the motor can operate at high temperatures. It also lubricates the bearings, reducing friction and wear on the first bearing 120 and the second bearing 220. The filter 320 within the through hole 311 removes solid impurities from the liquid medium, preventing fixed impurities from entering the shielding sleeve 110 and damaging the motor.

[0041] In some embodiments, the shielding sleeve 110 is welded to the mounting portion 211 of the bracket cover 210. By welding the connecting surfaces between the shielding sleeve 110 and the mounting portion 211 of the bracket cover 210, a double-layer protection function is achieved, which can further improve the sealing effect and connection strength.

[0042] In addition, such as Figure 4As shown, this embodiment also proposes a motor, including a housing 510, a stator 520, an impeller 530, and a motor shielding structure. The motor shielding structure is configured as described in any of the above embodiments. The stator 520 and the motor shielding structure are fixedly installed inside the housing 510. Specifically, a stator 520 mounting cavity is provided inside the housing 510, and a stator 520 is disposed inside the stator 520 mounting cavity. The shielding sleeve 110 is disposed at the geometric center of the stator 520, and the impeller 530 is fixedly connected to the rotor 300.

[0043] In addition, such as Figure 5 As shown in Figure 6, this utility model also proposes a canned motor pump, including a motor and a pump body. The motor is fixedly connected to the pump body. In this embodiment, the motor and the pump body are connected by bolts. The impeller 530 is fixedly connected to the through end of the rotating shaft 310 and located in the pump body. The impeller 530 rotates under the drive of the motor rotor 300 and drives the liquid medium in the pump body to flow. The motor is configured as described in the above embodiment. The bracket cover 210 is sealed between the housing 510 and the pump body. The bracket cover 210 covers the space between the stator 520 mounting cavity of the housing 510 and the pump body. The stator 520 mounting cavity of the housing 510 is sealed to prevent liquid medium from flowing into the stator 520 mounting cavity of the housing 510. A second sealing ring 402 is provided at the connection between the bracket cover 210 and the housing 510 and / or the pump body. In this embodiment, the connection surface between the bracket cover 210 and the housing 510 and the pump body 600 is set as an annular plane. The second sealing ring 402 covers the connection surface between the bracket cover 210 and the pump body 600, that is, the second sealing ring 402 covers the annular plane of the bracket cover 210. The second sealing ring 402 improves the sealing effect and prevents liquid medium leakage or seepage. It should be noted that in other embodiments, the second sealing ring 402 may also be provided on the connection surface between the bracket cover 210 and the housing 510, or simultaneously on the connection surface between the bracket cover 210 and the pump body 600 and the connection surface between the bracket cover 210 and the housing 510.

[0044] In summary, the motor shielding structure, motor, and shielded pump of this embodiment isolate the stator 520 mounting chamber and the rotor 300 mounting chamber of the motor from each other through the bracket cover assembly 200 located at the openings of the shielding sleeve 110 and the motor housing 510, preventing the liquid medium in the pump body from flowing into the stator 520 mounting chamber. The shielding effect is good, and only two sealing connections are required between the bracket cover 210 and the shielding sleeve assembly 100 and the motor housing 510, which is convenient for disassembly and assembly.

[0045] 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 invention will be included within the scope of the claims.

Claims

1. A motor shielding structure for a shielded pump, characterized in that, The motor shielding structure includes a rotor (300), a shielding sleeve assembly (100), and a bracket cover assembly (200). The shielding sleeve assembly (100) includes a shielding sleeve (110) and a first bearing (120). The shielding sleeve (110) forms an installation chamber with an opening at one end, and the first bearing (120) is sleeved in the installation chamber. The bracket cover assembly (200) includes a bracket cover (210), a bearing bracket (230), and a second bearing (220). The bracket cover (210) has a mounting portion (211) and a mounting hole (2111) on the mounting portion (211). The second bearing (220) is embedded in the mounting hole (2111) through the bearing bracket (230). The bracket cover (210) covers the opening of the shielding sleeve (110), and the mounting portion (211) and the shielding sleeve (110) are sealed together. The first bearing (120) and the second bearing (220) are coaxially arranged, and the rotor (300) is fixedly installed between the first bearing (120) and the second bearing (220), with one end of the rotor (300) passing through the second bearing (220).

2. The motor shielding structure according to claim 1, characterized in that, The shielded pump includes a motor and a pump body (600). The mounting part (211) is a hollow tube extending toward the shielding sleeve (110). The mounting part (211) is embedded in the opening of the shielding sleeve (110), and the outer wall of the hollow tube is tightly fitted with the inner wall of the shielding sleeve (110). The outer edge of the bracket cover (210) is sealed between the motor and the pump body (600) of the shielded pump.

3. The motor shielding structure according to claim 2, characterized in that, A first sealing ring (401) is also provided between the mounting part (211) and the shielding sleeve (110).

4. The motor shielding structure according to claim 1, characterized in that, The shielding sleeve (110) is cylindrical, the first bearing (120) and the shielding sleeve (110) are interference-fitted, and a gap is formed between the first bearing (120) and the inner bottom wall of the shielding sleeve (110).

5. The motor shielding structure according to any one of claims 1 to 4, characterized in that, The bearing bracket (230) is provided with a number of guide grooves (231) or guide holes arranged in the axial direction so that the liquid medium can flow into the shielding sleeve (110).

6. The motor shielding structure according to claim 5, characterized in that, The rotor (300) includes a shaft (310), and the shaft (310) is provided with a through hole (311) arranged in the axial direction. The through hole (311) connects the two ends of the shaft (310), and a filter (320) is also provided in the through hole (311).

7. The motor shielding structure according to any one of claims 1 to 4, characterized in that, The shielding sleeve (110) is welded to the mounting part (211) of the bracket cover (210).

8. An electric motor, comprising a housing (510), a stator (520), an impeller (530), and a motor shielding structure, characterized in that, The motor shielding structure is configured as described in any one of claims 1 to 7, the stator (520) and the motor shielding structure are fixedly installed inside the housing (510), and the impeller (530) is fixedly connected to the rotor (300).

9. A canned motor pump, comprising a motor and a pump body (600), wherein the motor is fixedly connected to the pump body (600), and the impeller (530) is located within the pump body (600), characterized in that, The motor is configured as described in claim 8, and the bracket cover (210) is sealed between the housing (510) and the pump body (600).

10. The shielded pump according to claim 9, characterized in that, A second sealing ring (402) is provided at the connection between the bracket cover (210) and the housing (510) and / or the pump body (600).

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