Dry-wear-resistant shield pump

Abstract

The invention relates to the technical field of shield pumps, in particular to a dry-wear-resistant shield pump which comprises a pump body, a first wear-resistant sealing assembly and a second wear-resistant sealing assembly, a pump shaft is arranged in the pump body, the first wear-resistant sealing assembly is arranged in the pump body and located at one end of the pump shaft, and the second wear-resistant sealing assembly is located at the other end of the pump shaft. The second wear-resistant sealing assembly is arranged in the pump body and located at the other end of the pump shaft. By adopting the wear-resistant shaft sleeves, the wear-resistant bearings and the thrust discs in the first wear-resistant sealing assembly and the second wear-resistant sealing assembly, the wear resistance of the pump body can be effectively improved, especially under the condition that large friction force and wear exist in the working environment, the service life is longer when dry grinding media are conveyed, the maintenance frequency is reduced, and the service life of the pump body is prolonged. And through the arrangement of the first wear-resistant sealing assembly and the second wear-resistant sealing assembly, liquid leakage can be effectively prevented, and it is ensured that the pressure in the pump body is maintained.

Description

Technical Field

[0001] The invention relates to the technical field of canned pumps, and in particular to a dry wear resistant canned pump. Background Art

[0002] The canned motor drive pump is a pump that has the stator winding and the rotor winding placed in a sealed metal cylinder. The pump housing is connected to the drive motor housing with a flange seal, and the pump shaft dynamic seal structure is eliminated. Its working principle is similar to that of an ordinary canned pump. It uses the centrifugal force generated by the rotation of the impeller to draw the liquid into the pump from the inlet, and after passing through the flow channel of the pump housing and the blades, it is discharged from the pump port. In the dry wear-resistant canned pump, since the impeller and the motor rotor are connected as a whole and installed in a sealed housing, a packing device is no longer required, which fundamentally eliminates the possibility of leakage.

[0003] A noise-reducing shielded pump with publication number CN105927596A, wherein a stator sleeve is disposed on the outside of the stator, an external thread is disposed on the stator sleeve, a shielding sleeve is disposed on the outside of the stator sleeve, and an internal thread is disposed on the shielding sleeve, which can simplify the additional connection structure, making the structure compact and reliable, a balance plate is disposed between the front bearing seat and the impeller, which can reduce the damage of components such as bearings and thrust plates, and a vibration-reducing and noise-reducing plate is disposed on the bottom side of the base, which can reduce the vibration and noise of the shielded pump when it is working. However, these traditional shielded pumps are prone to lack of cooling liquid around the mechanical seal provided between the motor shaft and the pump cover when the pump starts working or the pumping pressure is low, causing the mechanical seal to be easily in a dry grinding state, reducing the service life of the mechanical seal. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that mechanical seals are easily in a state of dry wear, which reduces the service life of the mechanical seals. A dry wear-resistant shielded pump is provided, which can effectively improve the wear resistance of the pump body through the wear-resistant sleeve, wear-resistant bearing and thrust plate in the first wear-resistant sealing component and the second wear-resistant sealing component.

[0005] In order to achieve the above-mentioned purpose, the present invention proposes a dry-wear resistant shielded pump, including a pump body, a first wear-resistant sealing assembly and a second wear-resistant sealing assembly. A pump shaft is arranged inside the pump body, the first wear-resistant sealing assembly is arranged inside the pump body and is installed at one end of the pump shaft, and the second wear-resistant sealing assembly is arranged inside the pump body and is installed at the other end of the pump shaft.

[0006] As a further description of the above technical solution: the first wear-resistant sealing assembly includes a first wear-resistant sleeve, a first wear-resistant bearing and a wear-resistant front thrust plate, the first wear-resistant sleeve and the first wear-resistant bearing are sequentially passed through one end of the pump shaft from the inside to the outside, and the first wear-resistant sleeve is tightly attached to one end of the wear-resistant front thrust plate.

[0007] As a further description of the above technical solution: the second wear-resistant sealing assembly includes a second wear-resistant sleeve, a second wear-resistant bearing and a wear-resistant rear thrust plate, the second wear-resistant sleeve and the second wear-resistant bearing are sequentially passed through one end of the pump shaft from the inside to the outside, and the second wear-resistant sleeve is tightly attached to one end of the wear-resistant rear thrust plate.

[0008] As a further description of the above technical solution: the pump body is detachably connected to a first end cover and a second end cover, the first end cover is detachably connected to the impeller on one side, the other end of the first end cover is provided with a first limiting groove adapted to the first wear-resistant sealing assembly, and the second end cover is provided with a second limiting groove adapted to the second wear-resistant sealing assembly.

[0009] As a further description of the above technical solution: a working chamber is opened inside the pump body, a stator is arranged inside the working chamber, and a shielding component is arranged between the stator and the pump shaft.

[0010] As a further description of the above technical solution: the shielding assembly includes a non-metallic rotor shielding sleeve and a non-metallic stator shielding sleeve, the non-metallic rotor shielding sleeve is sleeved on the pump shaft, and the non-metallic stator shielding sleeve is sleeved on the non-metallic rotor shielding sleeve.

[0011] As a further description of the above technical solution: a liquid inlet pipe is arranged at one end of the pump body close to the impeller, a liquid discharge pipe is arranged at one side of the impeller, a first through hole is formed on the first end cover close to the end of the liquid discharge pipe, a second through hole is formed on the first end cover close to the first wear-resistant sealing component, a third through hole is formed on the second end cover close to the second wear-resistant sealing component, and a fourth through hole is formed on the first end cover away from the end of the liquid discharge pipe.

[0012] As a further description of the above technical solution: the second wear-resistant bearing and the first wear-resistant bearing are both provided with axial grooves therein, and the axial grooves are serpentine grooves.

[0013] As a further description of the above technical solution: the first wear-resistant sealing component and the second wear-resistant sealing component are both made of wear-resistant materials.

[0014] As a further description of the above technical solution: the bottom of the pump body is connected to the base through a connecting frame, and a sealing plug is provided under the pump body.

[0015] The above technical solution has the following advantages or beneficial effects:

[0016] 1. The present invention can effectively improve the wear resistance of the pump body by adopting the wear-resistant sleeve, wear-resistant bearing and thrust plate in the first wear-resistant sealing component and the second wear-resistant sealing component, especially when there is large friction and wear in the working environment, so that the pump has a longer service life when conveying dry abrasive media and reduces the maintenance frequency. The setting of the first wear-resistant sealing component and the second wear-resistant sealing component can effectively prevent liquid leakage and ensure that the pressure inside the pump body is maintained. The design of the wear-resistant sleeve and the thrust plate can provide better sealing performance, reduce the entry of external pollutants, prevent liquid leakage, and improve the working efficiency and reliability of the pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a dry wear resistant canned motor pump in one embodiment of the present invention;

[0018] Figure 2 for Figure 1 A schematic structural diagram of the first wear-resistant sealing component;

[0019] Figure 3 for Figure 1 A schematic diagram of the structure of the second wear-resistant sealing component;

[0020] Figure 4 for Figure 1 A schematic diagram of the structure of the first end cover;

[0021] Figure 5 for Figure 1 A schematic diagram of the structure of the second end cover;

[0022] Figure 6 for Figure 1 Working diagram of the first wear-resistant bearing.

[0023] Legend:

[0024] 1. Pump body; 2. Pump shaft; 3. First wear-resistant sealing assembly; 4. Second wear-resistant sealing assembly; 5. First end cover; 6. Second end cover; 7. Impeller; 8. First limiting groove; 9. Second limiting groove; 10. Working chamber; 11. Stator; 12. Shielding assembly; 13. Liquid inlet pipe; 14. Liquid discharge pipe; 15. First through hole; 16. Second through hole; 17. Third through hole; 18. Fourth through hole; 19. Axial groove; 20. Connecting frame; 21. Base; 22. Sealing plug; 31. First wear-resistant bushing; 32. First wear-resistant bearing; 33. Wear-resistant front thrust plate; 41. Second wear-resistant bushing; 42. Second wear-resistant bearing; 43. Wear-resistant rear thrust plate; 1201. Non-metallic rotor shielding sleeve; 1202. Non-metallic stator shielding sleeve. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See also Figure 1-6 The present invention provides a technical solution: a dry wear-resistant shielded pump of the present invention comprises: a pump body 1, a first wear-resistant sealing component 3 and a second wear-resistant sealing component 4, a pump shaft 2 is arranged inside the pump body 1, the first wear-resistant sealing component 3 is arranged inside the pump body 1 and is located at one end of the pump shaft 2, the second wear-resistant sealing component 4 is arranged inside the pump body 1 and is located at the other end of the pump shaft 2, the first wear-resistant sealing component 3 comprises a first wear-resistant sleeve 31, a first wear-resistant bearing 32 And a wear-resistant front thrust plate 33, the first wear-resistant sleeve 31 and the first wear-resistant bearing 32 are sequentially passed through one end of the pump shaft 2 from the inside to the outside, and the first wear-resistant sleeve 31 is tightly attached to one end of the wear-resistant front thrust plate 33. The second wear-resistant sealing assembly 4 includes a second wear-resistant sleeve 41, a second wear-resistant bearing 42 and a wear-resistant rear thrust plate 43. The second wear-resistant sleeve 41 and the second wear-resistant bearing 42 are sequentially passed through one end of the pump shaft 2 from the inside to the outside, and the second wear-resistant sleeve 41 is tightly attached to one end of the wear-resistant rear thrust plate 43.

[0029] In the technical solution of the present invention, by adopting the wear-resistant sleeve, wear-resistant bearing and thrust plate in the first wear-resistant sealing component 3 and the second wear-resistant sealing component 4, the wear resistance of the pump body can be effectively improved. In particular, when there is a large friction and wear in the working environment, the shielded pump has a longer service life when conveying dry abrasive media and reduces the maintenance frequency. The setting of the first wear-resistant sealing component 3 and the second wear-resistant sealing component 4 can effectively prevent the leakage of liquid and ensure that the pressure inside the pump body is maintained. The design of the wear-resistant sleeve and the thrust plate can provide better sealing performance, reduce the entry of external pollutants, prevent liquid leakage, and improve the working efficiency and reliability of the pump. Due to the presence of the wear-resistant bearing and the thrust plate, the friction resistance between the pump shaft and the pump body can be effectively reduced. Through precise design, the friction loss is reduced, the pump operation is more efficient, can withstand higher loads and is not prone to failure. The design of the wear-resistant front thrust plate and the wear-resistant rear thrust plate can effectively disperse the axial force borne by the bearing and improve the working stability of the pump body under high load conditions. The thrust plate can evenly distribute the thrust, reduce the risk of local overload, and thus extend the service life of the entire system.

[0030] Among them, the shielded pump eliminates the rotating shaft sealing device of the traditional centrifugal pump, and the dry-wear-resistant shielded pump can be completely leak-free, avoiding the safety hazards and environmental pollution caused by medium leakage; the bearings, sleeves and thrust plate components are made of special wear-resistant materials, so that the dry-wear-resistant shielded pump has a longer service life when conveying dry abrasive media; the pump shaft is directly connected to the impeller, which reduces the energy loss in the intermediate transmission link and improves the operation efficiency of the pump.

[0031] Specifically, the first wear-resistant sealing component 3 and the second wear-resistant sealing component 4 are respectively located at both ends of the pump shaft, which can effectively prevent leakage of the medium. The double-end sealing design ensures that the sealing performance of the pump is more stable and reliable when it is running, thereby avoiding contamination or damage between the inside of the pump body and the external environment. By arranging the wear-resistant sealing components at both ends of the pump shaft, more uniform and stable support can be provided when the pump shaft rotates. This design effectively prevents the pump shaft from being offset or unevenly loaded, thereby reducing the failure rate of the equipment and improving work efficiency. Since both ends are supported by wear-resistant sealing components, the pump shaft is not easily affected by external force impact during operation, reducing the possibility of equipment failure and ensuring the long-term stable operation of the equipment. By installing the first wear-resistant sealing component 3 and the second wear-resistant sealing component 4 at both ends of the pump shaft, not only the sealing effect and wear resistance of the equipment are improved, but also the stability and service life of the equipment are improved.

[0032] like Figure 1 and Figure 2As shown, the pump body 1 is detachably connected with the first end cover 5 and the second end cover 6, the first end cover 5 is detachably connected with the impeller 7 on one side, the first end cover 5 is provided with a first limiting groove 8 adapted to the first wear-resistant sealing component 3 at the other end, and the second end cover 6 is provided with a second limiting groove 9 adapted to the second wear-resistant sealing component 4; through the detachable connection between the pump body 1 and the first end cover 5 and the second end cover 6, the maintenance and disassembly process of the pump becomes simpler and more convenient. When it is necessary to inspect, clean or replace internal parts, the end cover can be easily disassembled, saving time and cost. The first limiting groove 8 and the second limiting groove 9 respectively provided on the first end cover 5 and the second end cover 6 can be closely adapted to the first wear-resistant sealing component 3 and the second wear-resistant sealing component 4. This design ensures that the position of the sealing component is stable, prevents it from being offset or falling off during operation, thereby enhancing the sealing performance of the pump and effectively preventing medium leakage. Due to the detachable design of the end cover, maintenance personnel can more easily disassemble, replace or adjust the sealing component, thereby reducing the complexity and labor cost of maintenance. This modular design makes it easier to replace components, which helps improve the overall operation and maintenance efficiency of the equipment. The precise limit groove design ensures the correct positioning of the sealing components, making the sealing effect more stable. This reduces leakage or efficiency loss caused by poor sealing, ensures that the pump operates under efficient and stable conditions, and improves overall work efficiency.

[0033] Among them, a plurality of sealing gaskets are arranged between the first end cover 5 , the second end cover 6 and the pump body 1 , so as to enhance the sealing performance between the first end cover 5 , the second end cover 6 and the pump body 1 .

[0034] like Figure 1 As shown, a working chamber 10 is opened inside the pump body 1, a stator 11 is arranged inside the working chamber 10, a shielding component 12 is arranged between the stator 11 and the pump shaft 2, and the shielding component 12 includes a non-metallic rotor shielding sleeve 1201 and a non-metallic stator shielding sleeve 1202, the non-metallic rotor shielding sleeve 1201 is sleeved on the pump shaft 2, and the non-metallic stator shielding sleeve 1202 is sleeved on the non-metallic rotor shielding sleeve 1201; the non-metallic shielding component 12 is injection molded by filling polytetrafluoroethylene material, that is, non-metallic method, and the stator 11 and the pump shaft 2 are completely sealed to form a closed cavity to achieve a shielding effect. The non-metallic shielding sleeve is not easy to transfer heat, and the medium vaporization will avoid the dry wear of the bearing, the material cost is significantly reduced, it is suitable for strong acid resistance conditions, and the dry wear resistance effect is improved.

[0035] Specifically, the non-metallic rotor shielding sleeve 1201 and the non-metallic stator shielding sleeve 1202 are formed by injection molding to form a completely sealed closed cavity between the pump shaft 2 and the stator 11. This sealing structure effectively isolates the contact area between the medium and the bearing, avoids friction and wear caused by medium leakage, and enhances the overall sealing of the pump. The non-metallic shielding sleeve adopts polytetrafluoroethylene material, which can effectively prevent heat conduction through its excellent non-thermal conductivity and avoid the dry grinding of the bearing caused by the vaporization of the medium. By maintaining the low temperature state of the bearing and the sealing component, the damage and failure of the mechanical parts caused by overheating are reduced. The low thermal conductivity of the non-metallic material prevents the shielding sleeve from affecting the operating stability of the pump due to the excessive temperature of the medium during operation. Through effective heat insulation, the performance changes of the pump body and the sealing component caused by temperature fluctuations are avoided, thereby improving the reliability of the equipment. The use of the non-metallic rotor shielding sleeve 1201 and the non-metallic stator shielding sleeve 1202 not only significantly improves the sealing effect and dry grinding resistance, but also reduces the cost and adapts to harsh working conditions through the advantages of polytetrafluoroethylene materials, thereby enhancing the overall durability and working stability of the pump.

[0036] like Figure 4 and Figure 5 As shown, a liquid inlet pipe 13 is provided at one end of the pump body 1 close to the impeller 7, a liquid discharge pipe 14 is provided at one side of the impeller 7, a first through hole 15 is provided at the first end cover 5 close to the liquid discharge pipe 14, a second through hole 16 is provided at the first end cover 5 close to the first wear-resistant sealing component 3, a third through hole 17 is provided at the second end cover 6 close to the second wear-resistant sealing component 4, and a fourth through hole 18 is provided at the first end cover 5 away from the liquid discharge pipe 14; by providing the first through hole 15, the second through hole 16 and the fourth through hole 18 on the first end cover 5, and providing the third through hole 17 on the second end cover 6, when the pressure at the impeller 7 port is greater than the pressure of the impeller rear cover plate and the pressure in the front bearing seat area, part of the conveying medium coming out of the impeller 7 will flow through the first through hole 15 into the first end cover 5, and then enter the second through hole 16 again To the first wear-resistant sleeve 31, the inner gap of the first wear-resistant sleeve 31, the inner and outer sides and the end of the first wear-resistant bearing 32 and the wear-resistant front thrust plate 33 are effectively cooled and lubricated, and the conveying medium then flows to the second wear-resistant sealing assembly 4 through the first wear-resistant sleeve 31, so that part of the conveying medium coming out of the impeller flows through the inner gap of the second wear-resistant sleeve 41, the inner and outer sides and the end of the second wear-resistant bearing 42 and the wear-resistant rear thrust plate 43 to be effectively cooled and lubricated, and the conveying medium then flows back to the fourth through hole 18 through the third through hole 17 opened on the second end cover 6, and returns to the impeller 7 inlet through the fourth through hole 18 to form a circulation loop, so that the first wear-resistant sealing assembly 3 and the second wear-resistant sealing assembly 4 are effectively cooled and lubricated, thereby improving the heat dissipation effect, enhancing the dry wear resistance effect, improving the reliability of the shielded pump, and extending the life of the pump.

[0037] Among them, a filter screen is arranged at the first through hole 15, and the first through hole 15 can be blocked according to the situation. By setting a plurality of through holes, the conveying medium can form a circulation loop between the impeller outlet and the inlet. This loop allows the coolant to flow in the pump body, effectively reducing the temperature of the pump, ensuring that the sealing component always maintains a good working condition during the operation process, avoiding overheating or excessive wear. By optimizing the liquid flow path, the coolant can cover all parts that need heat dissipation, especially the wear-resistant sealing component, improving the heat dissipation efficiency, ensuring that the pump body will not cause performance degradation or failure due to overheating, and enhancing the dry wear resistance effect.

[0038] like Figure 1 and Figure 6 As shown, the second wear-resistant bearing 42 and the first wear-resistant bearing 32 are both provided with axial grooves 19, and the axial grooves 19 are serpentine grooves; the design of the serpentine axial grooves 19 can effectively guide the flow of lubricating oil and maintain continuous lubrication of the bearing surface. This structure enables the lubricating oil to be more evenly distributed on the bearing contact surface, reduces friction and wear, and improves the working efficiency and service life of the bearing. The serpentine axial grooves 19 can effectively disperse the pressure inside the bearing, reduce the risk of local overheating, and reduce friction, so that the bearing can still maintain stable operation when running under high load. Due to the reduction in friction, the wear rate of the bearing is also greatly reduced. The serpentine axial grooves 19 can enhance the flow of the medium inside the bearing, so that the heat can be quickly taken away. The bearing can better maintain stable operation in a high-temperature working environment and avoid performance degradation or damage caused by overheating. The serpentine axial groove 19 can also play a certain sealing role, helping to prevent lubricating oil leakage and blocking the entry of external contaminants, further improving the durability and working reliability of the bearing. Through the serpentine groove design, the bearing can disperse the load pressure so that the bearing will not be locally overloaded when it is under a large load, thereby extending the service life of the bearing and improving the long-term stability of the equipment. The axial groove using the serpentine axial groove 19 can provide significant advantages in reducing friction, improving lubrication, increasing heat dissipation and improving load-bearing capacity, making the first and second wear-resistant bearings work more efficiently and stably, adapting to more harsh working conditions, and enhancing the dry wear resistance effect.

[0039] like Figure 1 , Figure 2 and Figure 3 As shown, the first wear-resistant sealing assembly 3 and the second wear-resistant sealing assembly 4 are both made of wear-resistant materials; the first wear-resistant sleeve 31, the first wear-resistant bearing 32, the wear-resistant front thrust plate 33, the second wear-resistant sleeve 41, the second wear-resistant bearing 42 and the wear-resistant rear thrust plate 43 use special wear-resistant materials such as ceramics, silicon carbide, etc. during the manufacturing process. These materials have excellent wear resistance and can extend the service life of the pump.

[0040] Specifically, the first wear-resistant sleeve 31, the first wear-resistant bearing 32, and the wear-resistant front thrust plate 33 are directly involved in the operation of the pump and bear great mechanical pressure. The use of wear-resistant materials such as ceramics and silicon carbide can greatly reduce wear, prevent component failure due to long-term friction, and ensure long-term stable operation of the pump. The second wear-resistant sleeve 41, the second wear-resistant bearing 42, and the wear-resistant rear thrust plate 43 work in conjunction with the first group of components to support the overall operation of the pump. After the use of wear-resistant materials, the durability and stability of the pump can be further improved, especially under high load or harsh working environments. By selecting wear-resistant materials such as ceramics and silicon carbide, the wear-resistant components in the manufacturing process not only extend the service life of the pump, but also ensure that the pump reduces the frequency of maintenance and replacement when it operates efficiently for a long time. This design improves the reliability of the pump and reduces operation and maintenance costs.

[0041] Among them, the shielded pump connects the pump impeller 7 and the rotor together and installs them in a sealed housing. This design makes the pump more stable during operation and reduces the risk of leakage; the shielding sleeve separates the rotor and the stator. The rotor runs in the medium being transported, and its power is transmitted to the rotor through the stator magnetic field. This structure not only ensures the normal operation of the motor, but also improves the dry wear resistance of the pump; the dry wear-resistant shielded pump uses special wear-resistant materials such as ceramics and silicon carbide during the manufacturing process. These materials have excellent wear resistance and can extend the service life of the pump.

[0042] like Figure 1 As shown, the bottom of the pump body 1 is connected to the base 21 through a connecting frame 20, and a sealing plug 22 is provided at the bottom of the pump body 1; the pump body 1 can be supported by the base 21 and the connecting frame 20 to enhance the stability of the pump body 1, and the liquid refluxed at the fourth through hole 18 can be released through the sealing plug 22.

[0043] Working principle: By adopting the wear-resistant sleeve, wear-resistant bearing and thrust plate in the first wear-resistant sealing component 3 and the second wear-resistant sealing component 4, the wear resistance of the pump body can be effectively improved. Especially in the case of large friction and wear in the working environment, the shielded pump has a longer service life when conveying dry abrasive media and reduces the maintenance frequency. The setting of the first wear-resistant sealing component 3 and the second wear-resistant sealing component 4 can effectively prevent the leakage of liquid and ensure that the pressure inside the pump body is maintained. The design of the wear-resistant sleeve and thrust plate can provide better sealing performance, reduce the entry of external pollutants, prevent liquid leakage, and improve the working efficiency and reliability of the pump. Due to the presence of wear-resistant bearings and thrust plates, the friction resistance between the pump shaft and the pump body can be effectively reduced. Through precise design, friction loss is reduced, making the pump run more efficiently, able to withstand higher loads and less prone to failure.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A dry wear resistant canned motor pump, characterized in that: include: A pump body (1), wherein a pump shaft (2) is arranged inside the pump body (1); A first wear-resistant sealing component (3), the first wear-resistant sealing component (3) is arranged inside the pump body (1) and is installed at one end of the pump shaft (2); A second wear-resistant sealing component (4), the second wear-resistant sealing component (4) is arranged inside the pump body (1) and is located and installed on the other end of the pump shaft (2).

2. The dry wear resistant canned motor pump according to claim 1, characterized in that: The first wear-resistant sealing assembly (3) comprises a first wear-resistant sleeve (31), a first wear-resistant bearing (32) and a wear-resistant front thrust plate (33); the first wear-resistant sleeve (31) and the first wear-resistant bearing (32) are sequentially inserted from the inside to the outside on one end of the pump shaft (2); the first wear-resistant sleeve (31) is tightly attached to one end of the wear-resistant front thrust plate (33).

3. The dry wear resistant canned motor pump according to claim 1, characterized in that: The second wear-resistant sealing assembly (4) comprises a second wear-resistant sleeve (41), a second wear-resistant bearing (42) and a wear-resistant rear thrust plate (43); the second wear-resistant sleeve (41) and the second wear-resistant bearing (42) are sequentially inserted into one end of the pump shaft (2) from the inside to the outside; the second wear-resistant sleeve (41) is tightly attached to one end of the wear-resistant rear thrust plate (43).

4. The dry wear resistant canned motor pump according to claim 1, characterized in that: The pump body (1) is detachably connected to a first end cover (5) and a second end cover (6); the first end cover (5) is detachably connected to an impeller (7) at one side; the first end cover (5) is provided with a first limiting groove (8) adapted to the first wear-resistant sealing component (3) at the other end; and the second end cover (6) is provided with a second limiting groove (9) adapted to the second wear-resistant sealing component (4).

5. The dry wear resistant canned motor pump according to claim 1, characterized in that: A working chamber (10) is provided inside the pump body (1), a stator (11) is provided inside the working chamber (10), and a shielding component (12) is provided between the stator (11) and the pump shaft (2).

6. The dry wear resistant canned motor pump according to claim 5, characterized in that: The shielding assembly (12) comprises a non-metallic rotor shielding sleeve (1201) and a non-metallic stator shielding sleeve (1202); the non-metallic rotor shielding sleeve (1201) is sleeved on the pump shaft (2); and the non-metallic stator shielding sleeve (1202) is sleeved on the non-metallic rotor shielding sleeve (1201).

7. The dry wear resistant canned motor pump according to claim 4, characterized in that: The pump body (1) is provided with a liquid inlet pipe (13) at one end close to the impeller (7), a liquid discharge pipe (14) is provided at one side of the impeller (7), a first through hole (15) is provided at the end of the first end cover (5) close to the liquid discharge pipe (14), a second through hole (16) is provided at the first end cover (5) close to the first wear-resistant sealing component (3), a third through hole (17) is provided at the second end cover (6) close to the second wear-resistant sealing component (4), and a fourth through hole (18) is provided at the end of the first end cover (5) away from the liquid discharge pipe (14).

8. The dry wear resistant canned motor pump according to claim 3, characterized in that: The second wear-resistant bearing (42) and the first wear-resistant bearing (32) are both provided with axial grooves (19) inside, and the axial grooves (19) are serpentine grooves.

9. The dry wear resistant canned motor pump according to claim 1, characterized in that: The first wear-resistant sealing component (3) and the second wear-resistant sealing component (4) are both made of wear-resistant materials.

10. The dry wear resistant canned motor pump according to claim 1, characterized in that: The bottom of the pump body (1) is connected to the base (21) via a connecting frame (20), and a sealing plug (22) is provided at the bottom of the pump body (1).

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