Submersible pump cylinder

Abstract

The utility model discloses a submersible pump oil cylinder, including the oil cylinder main body, its characterized in that oil cylinder main body is the cone shape of the seat and the central through -hole with, lower end circumference outside is provided with annular heat dissipation groove, still be equipped with several heat dissipation copper sheets, through and fixed in the oil cylinder main body inside, one end is located in the inside of annular heat dissipation groove, the other end extends to the inside of oil cylinder main body and the lubricating oil in oil chamber direct contact, adopt the utility model structure, realize the heat that the running of rotating shaft produced makes the temperature of lubricating oil rise, and the heat is passed through lubricating oil and is delivered to L type heat dissipation copper sheet, and then through annular heat dissipation groove and the outside medium carry out heat exchange, realize the oil in the oil cylinder of pump, the shaft cooling, avoid the deterioration of lubricating oil because of high temperature, and through annular heat dissipation groove can effectively guarantee that heat dissipation copper sheet will not directly with the external object knock and extrude, effectively guarantee that heat dissipation copper sheet will not bend and damage, and the simple structure is very practical, further improves the service life of submersible pump.

Description

Technical Field

[0001] This utility model relates to the field of submersible pump technology, specifically to a submersible pump cylinder. Background Technology

[0002] Submersible pumps are devices for transporting fluids. Currently, the shafts used in submersible pumps manufactured by companies have poor wear resistance. After a period of use, especially the section of the shaft near the oil seal, it is prone to wear and grooves. Severe wear can affect the normal operation of the submersible pump. Therefore, there are many structural improvements needed. A search reveals that Chinese patent CN214464945U discloses a submersible pump with a novel shaft design. This design uses a wear-resistant sleeve to protect the section of the shaft between the drive impeller and the cylinder head, effectively preventing shaft wear and extending the shaft's service life. However, in the existing technology, sealing ring 1 and sealing ring 2 are used as sealing isolation parts between the submersible pump cylinder and the shaft to achieve good oil isolation and lubrication effect. However, when used in sewage pumps or larger pump bodies, the shaft rotates at high speed for a long time, generating heat, which causes the oil in the cylinder to deteriorate at high temperature (such as producing carbon deposits or foreign matter), thus affecting the long-term lubrication effect of the shaft. The heat dissipation of this oil and shaft is easily overlooked. Therefore, a submersible pump cylinder and submersible pump with heat dissipation design are provided. Utility Model Content

[0003] To solve the problems mentioned in the background art, the technical solution adopted by this utility model is: a submersible pump cylinder, including a cylinder body, characterized in that the cylinder body is a cone shape with a seat and a central through hole, and an annular heat dissipation groove is preset on the outer side of the lower circumference. The annular heat dissipation groove is continuously distributed along the circumference of the cylinder body to form a groove structure. Several heat dissipation copper plates are also provided, which are L-shaped, penetrate through and fixed inside and outside the cylinder body, with one end located inside the annular heat dissipation groove and the other end extending into the inside of the cylinder body to directly contact the lubricating oil in the oil cavity.

[0004] The bottom of the cylinder body is provided with a cylinder cover, which is also provided with a through hole that matches the rotating shaft. Both the cylinder body and the cylinder cover are provided with skeleton oil seals inside the through holes. The central through hole is used for the submersible pump's power shaft to pass through, ensuring that the power shaft is in full contact with the lubricating oil inside the cylinder. The skeleton oil seal is tightly fitted with the rotating shaft to achieve dynamic sealing.

[0005] It also includes a pump body, the top of which is connected to a motor cylinder. A hydraulic cylinder body is disposed between the pump body and the motor cylinder. A coil is disposed inside the motor cylinder, and a rotor shaft is disposed inside the coil. Bearings are disposed at both ends of the rotor shaft. One end of the rotor shaft is connected to the inside of the hydraulic cylinder body through the bearing. One end of the rotor shaft extends into the inside of the hydraulic cylinder body and movably passes through the skeleton oil seal in the middle of the hydraulic cylinder cover. An organic seal is sleeved between the hydraulic cylinder body and the hydraulic cylinder cover. The organic seal does not directly contact the rotor, which neither increases friction loss nor reduces the sealing performance of the oil cavity formed by the hydraulic cylinder body and the hydraulic cylinder cover. Furthermore, the organic seal has an intermittent position inside the hydraulic cylinder body to ensure that the oil in the hydraulic cylinder body contacts and lubricates the rotor shaft.

[0006] The bottom of the pump body is threaded with a first external hexagonal bolt, and the bottom of the pump body is fixedly connected to a base by the first external hexagonal bolt.

[0007] The rotating shaft extends through the cylinder cover into the pump body, with one end keyed to an impeller. A hexagonal nut is threaded onto one end of the rotating shaft at the impeller.

[0008] The bottom of the cylinder body is threaded with a second external hexagonal bolt, and the bottom of the cylinder body is fixedly connected to the cylinder cover by the second external hexagonal bolt. A first O-ring is provided between the bottom of the cylinder body and the cylinder cover.

[0009] The bottom end of the motor barrel is fixedly and sealed to the cylinder body by a first internal hex bolt, and a second O-ring is provided between the bottom end of the motor barrel and the cylinder body.

[0010] The top end of the rotating shaft is connected to the middle of the shaft seat via a bearing, and a wave-shaped washer is provided between the shaft seat and the bearing at the end of the rotating shaft.

[0011] The top of the motor cylinder is connected to a top cover, and a third O-ring is provided between the inside of the top cover and the shaft seat.

[0012] The pump body is bolted to a water outlet connector, and the bottom of the motor cylinder is connected to the pump body by a second inner angle bolt.

[0013] The first O-ring, the second O-ring, and the third O-ring are all made of nitrile rubber.

[0014] The plurality of heat dissipation copper fins are evenly distributed inside the cylinder body.

[0015] A submersible pump having the above-described cylinder structure.

[0016] This invention has the following advantages: By adding an L-shaped heat dissipation copper fin to the cylinder body, the heat generated by the operation of the power shaft raises the temperature of the lubricating oil. The heat is then transferred to the inner end of the cylinder body of the L-shaped heat dissipation copper fin through the lubricating oil. The heat dissipation copper fin conducts the heat to its outer end located in the annular heat dissipation groove, and then exchanges heat with the external medium (air or water) through the annular heat dissipation groove, thereby cooling the oil and shaft in the pump cylinder and preventing the lubricating oil from deteriorating due to high temperature. In addition, the annular heat dissipation groove effectively ensures that the heat dissipation copper fin will not be directly bumped or squeezed by external objects, effectively preventing the heat dissipation copper fin from bending and being damaged. This structure is simple, very practical, and suitable for use in sewage pumps or larger pump bodies. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the disassembled structure of the submersible pump according to a preferred embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the main structure of the hydraulic cylinder according to a preferred embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the main cross-sectional structure of the hydraulic cylinder according to a preferred embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the heat dissipation copper fin distribution structure of a preferred embodiment of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. First external hex bolt; 2. Base; 3. Pump body; 4. Hex nut; 5. Impeller; 7. Second external hex bolt; 8. Oil seal; 9. Internal hex plug; 10. Cylinder cover; 11. First internal hex bolt; 12. First O-ring; 13. Mechanical seal; 14. Cylinder body; 15. Second O-ring; 16. Second internal hex bolt; 17. Motor barrel; 18. Coil; 19. Bearing; 20. Shaft; 21. Wave washer; 22. Shaft seat; 23. Third O-ring; 24. Top cover; 25. Water outlet connector; 26. Heat dissipation copper fin; 27. Annular heat dissipation groove. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Please refer to the following: Figures 1-5 This utility model discloses a submersible pump cylinder, which is also a submersible pump structure, comprising: a pump body 3, a motor cylinder 17 connected to the top of the pump body 3, a cylinder body 14 disposed between the pump body 3 and the motor cylinder 17, a cylinder cover 10 disposed at the bottom of the cylinder body 14, an annular heat dissipation groove 27 pre-set on the outer circumference of the lower end of the cylinder body 14, and a heat dissipation copper fin 26 disposed inside the annular heat dissipation groove 27, with one end of the heat dissipation copper fin 26 extending into the annular heat dissipation groove 27 and the other end extending into the cylinder body 14. The bottom end of the cylinder head 10 is threaded with an internal hexagon plug 9. Both the cylinder body 14 and the cylinder head 10 are equipped with a skeleton oil seal 8. The motor barrel 17 is equipped with a coil 18. The coil 18 is equipped with a rotating shaft 20. Both ends of the rotating shaft 20 are equipped with bearings 19. One end of the rotating shaft 20 is connected to the inside of the cylinder body 14 through the bearing 19. The rotating shaft 20 extends into the inside of the cylinder body 14 and movably passes through the skeleton oil seal 8 in the middle of the cylinder head 10. The rotating shaft 20 is located between the cylinder body 14 and the cylinder head 10 and is fitted with an organic seal 13.

[0027] The mechanical seal 13 is an existing structure that does not directly contact the rotating shaft 20 during use. This not only does not increase friction loss, but also further enhances the sealing of the oil cavity formed by the cylinder body and the cylinder cover. In addition, the mechanical seal 13 has an intermittent position or intermittent setting inside the cylinder body to ensure that the oil in the cylinder body contacts and lubricates the rotating shaft.

[0028] The skeleton oil seal 8 provided on both the cylinder body 14 and the cylinder cover 10 not only ensures stable sealed rotation with the rotating shaft 20 and guarantees the sealing and isolation between the pump body 3 and the cylinder body 14, but also, in conjunction with the mechanical seal 13 located on the outer circumference of the rotating shaft 20, does not increase the friction between it and the rotating shaft 20, and can always ensure the sealing of the oil cavity between the cylinder body 14 and the cylinder cover 10.

[0029] The cylinder body 14 is a cone shape with a seat and a central through hole. An annular heat dissipation groove 27 is provided on the outer side of the lower circumference. The annular heat dissipation groove 27 is continuously distributed along the circumference of the cylinder body 14 to form a groove structure. Several heat dissipation copper plates 26 are also provided. They are L-shaped and pass through and are fixed inside and outside the cylinder body 14. That is, one end is located inside the annular heat dissipation groove 27, and the other end extends into the interior of the cylinder body 14 to directly contact the lubricating oil in the oil cavity. Several heat dissipation copper plates are evenly distributed inside the cylinder body.

[0030] The cylinder body 14 is provided with a cylinder cover 10 at its bottom. The cylinder cover 10 also has a through hole that matches the rotating shaft. Both the cylinder body 14 and the cylinder cover 10 have a skeleton oil seal 8 inside the through hole. The central through hole allows the power shaft of the submersible pump to pass through, ensuring that the power shaft is in full contact with the lubricating oil inside the cylinder. The skeleton oil seal 8 fits tightly with the rotating shaft 20 to achieve dynamic sealing. The skeleton oil seal is an existing structural reference, generally composed of a rubber sealing lip, a metal skeleton, and a spring. The metal skeleton ensures the overall shape stability of the oil seal, and the spring applies continuous radial pressure to the rubber sealing lip, making it tightly adhere to the surface of the rotating component (such as the power shaft of the rotating shaft 20). Its dynamic sealing principle is as follows: when the rotating shaft 20 (power shaft) rotates or extends, the rubber sealing lip always maintains tight contact with the shaft surface under the spring pressure, forming an elastic sealing interface. This interface can adapt in real time with the movement of the shaft, preventing the lubricating oil in the oil cavity from leaking along the gaps in the shaft, while also preventing external water or impurities from seeping into the oil cavity through the gap between the shaft and the cylinder.

[0031] The pump body 3 has a first external hexagon bolt 1 threadedly connected to its bottom. A base 2 is fixedly connected to the bottom of the pump body 3 via the first external hexagon bolt 1. A rotating shaft 20 extends through the cylinder cover 10 and into the pump body 3, with an impeller 5 keyed to one end. A hexagonal nut 4 is threadedly connected to the end of the rotating shaft 20 near the impeller 5. A second external hexagon bolt 7 is threadedly connected to the bottom of the cylinder body 14. The cylinder cover 10 is fixedly connected to the bottom of the cylinder body 14 via the second external hexagon bolt 7. A first O-ring 12 is provided between the bottom of the cylinder body 14 and the cylinder cover 10. When replacing the impeller 5, only the second internal hexagon bolt 16 needs to be removed to disassemble the pump body 3. The cylinder body 14 will not separate from the motor cylinder 17, facilitating subsequent direct installation of the pump body 3.

[0032] The bottom end of the motor barrel 17 is fixedly and sealed to the cylinder body 14 by a first internal hex bolt 11. A second O-ring 15 is provided between the bottom end of the motor barrel 17 and the cylinder body 14. The top end of the rotating shaft 20 is connected to the middle of the bearing seat 22 by a bearing 19. A wave washer 21 is provided between the bearing seat 22 and the bearing 19 at the end of the rotating shaft 20 to prevent the rotating shaft 20 from shaking. A top cover 24 is connected to the top end of the motor barrel 17. A third O-ring 23 is provided between the inside of the top cover 24 and the bearing seat 22. A water outlet connector 25 is fixedly connected to the water outlet end of the pump body 3 by bolts. The bottom end of the motor barrel 17 is connected to the pump body 3 by a second internal hex bolt 16. The first O-ring 12, the second O-ring 15 and the third O-ring 23 are all made of nitrile rubber. The first O-ring 12 ensures the seal between the cylinder head 10 and the cylinder body 14, the second O-ring 15 ensures the seal between the cylinder body 14 and the motor barrel 17, and the third O-ring 23 ensures the seal between the top cover 24 and the motor barrel 17. The heat dissipation copper fins 26 have an L-shaped structure, and several heat dissipation copper fins 26 are evenly distributed inside the cylinder body 14. The heat generated inside the cylinder body 14 is transferred to the heat dissipation copper fins 26 through lubricating oil, and then transferred to the annular heat dissipation groove 27 on the outside of the cylinder body 14 through the heat dissipation copper fins 26. The annular heat dissipation groove 27 directly contacts the external water, air or other media to dissipate heat and cool down. The annular heat dissipation groove 27 effectively ensures that the heat dissipation copper fins 26 will not be directly bumped or squeezed by external objects, thus effectively ensuring that the heat dissipation copper fins 26 will not be bent or damaged.

[0033] The submersible pump operates on the existing technology principle, whereby the impeller 5 is fixed to the end of the rotor 20 (power shaft) via a key connection. When the submersible pump starts, the coil 18 inside the motor barrel 17 is energized, driving the rotor 20 to rotate. The rotor 20 drives the impeller 5 to rotate synchronously at high speed, typically 1450 r / min or 2900 r / min. Centrifugal force is generated and the water flow is accelerated, resulting in a strong centrifugal force on the lower part of the pump body 3 during rotation. Under the action of centrifugal force, the water is thrown towards the edge of the impeller 5 and flows out at high speed from the flow channel between the blades. After being collected through the water outlet channel of the pump body 3, it is discharged to the target location (such as a water pipeline) through the water outlet connector 25.

[0034] The continuous pumping effect is as follows: as the impeller 5 continues to rotate, the above-mentioned "water intake-water ejection-water discharge" process is continuously cyclical, forming a continuous water flow, realizing the function of transporting water from low to high or over long distances.

[0035] The above structure can achieve the following: By adding an L-shaped heat dissipation copper fin to the cylinder body, the heat generated by the operation of the power shaft raises the temperature of the lubricating oil. The heat is transferred through the lubricating oil to the inner end of the cylinder body with the L-shaped heat dissipation copper fin; the heat dissipation copper fin 26 conducts the heat to its outer end located within the annular heat dissipation groove 27, and then exchanges heat with the external medium (air, water, or other) through the annular heat dissipation groove 27 to achieve cooling, preventing the lubricating oil from deteriorating due to high temperature. Furthermore, the annular heat dissipation groove effectively prevents the heat dissipation copper fin from directly impacting or being squeezed by external objects, effectively preventing the heat dissipation copper fin from bending or being damaged. The use of skeleton oil seals on both the cylinder body and cylinder cover ensures stable sealing and rotation with the shaft, guaranteeing the airtight seal between the pump body and the cylinder body. Simultaneously, the mechanical seal, located on the outer circumference of the shaft, prevents increased friction and maintains the airtightness of the oil cavity between the cylinder body and cylinder cover. The multiple sealing structures (skeleton oil seal and mechanical seal) ensure the oil cavity's airtightness. The combination of the skeleton oil seal and mechanical seal effectively prevents lubricant leakage and the infiltration of external impurities, further ensuring the submersible pump's stable and reliable operation and extending its overall lifespan. This design is particularly suitable for sewage pumps or larger pump bodies.

[0036] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

[0037] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A submersible pump cylinder, comprising a cylinder body (14), characterized in that, The lower circumference of the cylinder body (14) is provided with an annular heat dissipation groove (27). The annular heat dissipation groove (27) is continuously distributed along the circumference of the cylinder body (14) to form a groove structure. Several heat dissipation copper plates (26) are also provided, which penetrate and are fixed inside and outside the cylinder body (14). One end is located inside the annular heat dissipation groove (27), and the other end extends into the inside of the cylinder body (14).

2. The submersible pump cylinder according to claim 1, characterized in that, The cylinder body (14) is a cone shape with a seat and a central through hole.

3. The submersible pump cylinder according to claim 1, characterized in that, The heat dissipation copper fins (26) have an L-shaped structure and are evenly distributed inside the cylinder body.

4. The submersible pump cylinder according to claim 3, characterized in that, The bottom of the cylinder body (14) is provided with a cylinder cover (10), and the cylinder cover (10) is also provided with a through hole that matches the rotating shaft. The cylinder body (14) and the cylinder cover (10) are both provided with skeleton oil seals (8) inside the through holes.

5. The submersible pump cylinder according to claim 4, characterized in that, It also includes a pump body (3), the top of which is connected to a motor cylinder (17). A cylinder body (14) is provided between the pump body (3) and the motor cylinder (17). A coil (18) is provided inside the motor cylinder (17). A rotating shaft (20) is provided inside the coil (18). The rotating shaft (20) extends into the cylinder body (14) and movably passes through the skeleton oil seal (8) in the middle of the cylinder cover (10). A mechanical seal (13) is sleeved between the cylinder body (14) and the cylinder cover (10). The mechanical seal (13) has an intermittent position inside the cylinder body (14).

6. A submersible pump cylinder as described in claim 5, characterized in that, The bottom of the cylinder body (14) is threaded with a second external hexagonal bolt (7), and the bottom of the cylinder body (14) is fixedly connected to the cylinder cover (10) by the second external hexagonal bolt (7). A first O-ring (12) is provided between the bottom of the cylinder body (14) and the cylinder cover (10).

7. The submersible pump cylinder as described in claim 6, characterized in that, The bottom end of the motor cylinder (17) is fixedly and sealed to the cylinder body (14) by a first internal hex bolt (11), and a second O-ring (15) is provided between the bottom end of the motor cylinder (17) and the cylinder body (14).

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