Anti-corrosion self-sealing motor body of submersible sewage pump

Abstract

The application relates to the technical field of submersible sewage pumps, and discloses an anti-corrosion self-sealing submersible sewage pump motor body, which comprises a motor shell, a sealing cover arranged above the motor shell, a sealing mechanism arranged below the motor shell and a backflow mechanism arranged on the right side of the motor shell. The sealing mechanism comprises a lubricating oil cylinder, a rotating shaft arranged in the lubricating oil cylinder, and the rotating shaft extends to the inside of the motor shell through the lubricating oil cylinder and the motor shell in sequence. The anti-corrosion self-sealing submersible sewage pump motor body can tightly seal the gap between the sealing cover and the motor shell through the expansion of the rubber air bag under pressure, so that the sewage cannot enter the inside of the motor shell through the gap, the corrosion of the inside facilities of the motor shell is prevented, the self-sealing property of the submersible sewage pump motor body is effectively increased through cooperation of the submersible sewage pump and the sealing mechanism, the inside of the motor body is not easy to be corroded by the sewage, and the overall service life of the submersible sewage pump motor body is prolonged.

Description

Technical Field

[0001] This invention relates to the field of submersible sewage pump technology, specifically to a corrosion-resistant, self-sealing submersible sewage pump motor body. Background Technology

[0002] Submersible sewage pumps are submersible sewage pumps, particularly suitable for conveying liquids containing hard solids, fibrous materials, and especially dirty, viscous, and slippery liquids. There are two types: AS and AV submersible sewage pumps. Because submersible sewage pumps work underwater, they can be directly installed in sewage tanks without the need to build a dedicated pump house to install the pumps and machines, which can save a lot of land and infrastructure costs. They are the main working pumps for sewage pumping.

[0003] When using existing submersible sewage pumps, the pump body is immersed in sewage. As a result, after prolonged use, corrosive substances in the sewage can severely corrode the gaps in the pump body, making it susceptible to corrosion and unable to function properly. This significantly affects the pump body's corrosion resistance and self-sealing effect, and also reduces its overall service life. Summary of the Invention

[0004] The purpose of this invention is to provide a corrosion-resistant, self-sealing submersible sewage pump motor body to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a corrosion-resistant self-sealing submersible sewage pump motor body, including a motor housing, a sealing cover is provided on the upper part of the motor housing, a sealing mechanism is provided on the lower part of the motor housing, and a reflux mechanism is provided on the right side of the motor housing. The sealing mechanism includes a lubricating oil cylinder, inside which a rotating shaft is installed. The top end of the rotating shaft passes through the lubricating oil cylinder and the motor housing in sequence and extends into the interior of the motor housing. A rubber sealing ring and a rubber air bladder are respectively snapped onto the upper surface of the motor housing. Both the rubber sealing ring and the rubber air bladder are snapped into the interior of the sealing cover. A gearbox is fitted onto the outer surface of the rotating shaft. A large gear is fixedly installed on the outer surface of the rotating shaft. The large gear is located inside the gearbox. An oil inlet is opened on the right side of the gearbox. A small gear is rotatably connected inside the gearbox. The small gear meshes with the large gear. A delivery pipe is fixedly connected to the left side of the gearbox. The end of the delivery pipe away from the gearbox passes through the lubricating oil cylinder, the motor housing, and the rubber air bladder in sequence and extends into the interior of the rubber air bladder. The return mechanism includes a return pipe, the left end of which passes through the lubricating oil cylinder and extends into the interior of the lubricating oil cylinder. The top end of the return pipe is fixedly connected to a control cylinder. The upper surface of the control cylinder is fixedly connected to an oil inlet pipe. The left end of the oil inlet pipe passes through the motor housing and the rubber air bladder in sequence and extends into the interior of the rubber air bladder. A conical frame and a connecting frame are fixedly installed on the inner wall of the control cylinder. A conical block is snapped into the inside of the conical frame. A compression spring is fixedly installed on the bottom surface of the conical block. The bottom end of the compression spring is fixedly connected to the upper surface of the connecting frame.

[0006] Preferably, a water inlet cover is fixedly installed on the bottom surface of the lubricating oil cylinder, and the outer surface of the water inlet cover has water inlets arranged at equal intervals.

[0007] Preferably, a water outlet pipe is fixedly connected to the right side of the outer surface of the water inlet hood, and a connecting flange is fixedly installed on the outer surface of the water outlet pipe.

[0008] Preferably, the sealing cover has six sealing bolts connected to its internal threads. The bottom end of each sealing bolt penetrates the sealing cover and extends into the interior of the motor housing. Each sealing bolt is fixedly connected to the motor housing.

[0009] Preferably, a rotor is fixedly installed on the outer surface of the rotating shaft, a stator core is fixedly installed on the inner wall of the motor housing, and an impeller is fixedly installed at the bottom end of the rotating shaft.

[0010] Preferably, a sealed bearing is fitted onto the outer surface of the rotating shaft, and the inner wall of the motor housing and the inner wall of the lubricating oil cylinder are both fixedly connected to the outer surface of the outer ring of the sealed bearing.

[0011] Preferably, an auxiliary bearing is sleeved on the top end of the rotating shaft, a connecting seat is fixedly installed on the outer surface of the outer ring of the auxiliary bearing, the upper surface of the connecting seat is fixedly connected to the bottom surface of the sealing cover, a connecting line is fixedly installed on the upper surface of the connecting seat, and the top end of the connecting line passes through the sealing cover and extends to the top of the sealing cover.

[0012] Preferably, four support legs are fixedly installed on the bottom surface of the gearbox, and the bottom surface of each support leg is fixedly connected to the inner bottom wall of the motor housing.

[0013] Preferably, two reinforcing sleeves are fixedly installed on the outer surface of the conveying pipe, and the right side of each reinforcing sleeve is fixedly connected to the outer surface of the motor housing.

[0014] Preferably, the compression spring has a telescopic rod inside, the telescopic end of the telescopic rod is fixedly connected to the bottom surface of the conical block, and the bottom end of the telescopic rod is fixedly connected to the upper surface of the connecting frame.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are: This invention utilizes a rotating shaft to drive a large gear, which in turn drives a small gear. This, in turn, creates suction within the gearbox using a gear pump principle. This suction forces some lubricating oil from the lubricating oil cylinder into the gearbox through the inlet and then into a rubber bladder via a delivery pipe. As the rubber bladder expands under pressure, it tightly seals the gap between the sealing cover and the motor housing, preventing sewage from entering the motor housing and corroding its internal components. This sealing mechanism effectively increases the self-sealing performance of the submersible sewage pump motor, ensuring a tight seal within the motor body. The design is designed to prevent corrosion from sewage, thus extending the overall service life of the submersible sewage pump motor. An oil inlet pipe allows lubricating oil from inside the rubber airbag to be introduced into the control cylinder. When the lubricating oil pressure inside the control cylinder becomes too high, it presses down on the conical block, forcing the compression spring to contract. At this time, the lubricating oil can flow back into the lubricating oil cylinder through the gap between the conical block and the conical frame, and the gap on the connecting frame, in conjunction with the return pipe. This achieves the effect of maintaining a certain pressure inside the rubber airbag using the return mechanism, while simultaneously relieving the internal pressure of the rubber airbag, allowing the lubricating oil to circulate, and preventing the rubber airbag from rupturing due to excessive internal pressure. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the sealing cap of the present invention; Figure 2 This is a cross-sectional structural schematic diagram of the motor housing of the present invention; Figure 3 This is a cross-sectional structural schematic diagram of the lubricating oil cylinder of the present invention; Figure 4 This is a schematic diagram of the conveying pipe of the present invention; Figure 5 This is a schematic diagram of the gearbox structure, viewed from the right side in cross-section. Figure 6 This is a cross-sectional structural schematic diagram of the control cylinder of the present invention.

[0017] The components include: 1. Motor housing; 2. Sealing cover; 3. Sealing mechanism; 301. Lubricating oil cylinder; 302. Rotating shaft; 303. Rubber sealing ring; 304. Rubber air bladder; 305. Gearbox; 306. Large gear; 307. Oil inlet; 308. Small gear; 309. Delivery pipe; 4. Return mechanism; 401. Return pipe; 402. Control cylinder; 403. Oil inlet pipe; 404. Conical frame; 405. Connecting frame; 406. Conical block; 407. Compression spring; 5. Water inlet cover; 6. Water inlet; 7. Water outlet pipe; 8. Connecting flange; 9. Sealing bolt; 10. Rotor; 11. Stator core; 12. Impeller; 13. Sealed bearing; 14. Auxiliary bearing; 15. Connecting seat; 16. Connecting line; 17. Support leg; 18. Reinforcing sleeve; 19. Telescopic rod. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0019] Please see Figure 1-6 A corrosion-resistant self-sealing submersible sewage pump motor body includes a motor housing 1, a sealing cover 2 is provided on the top of the motor housing 1, a sealing mechanism 3 is provided on the bottom of the motor housing 1, and a return mechanism 4 is provided on the right side of the motor housing 1. The sealing mechanism 3 includes a lubricating oil cylinder 301. A rotating shaft 302 is installed inside the lubricating oil cylinder 301. The top end of the rotating shaft 302 passes through the lubricating oil cylinder 301 and the motor housing 1, extending into the interior of the motor housing 1. A rubber sealing ring 303 and a rubber air bladder 304 are respectively snapped onto the upper surface of the motor housing 1. Both the rubber sealing ring 303 and the rubber air bladder 304 are snapped into the interior of the sealing cover 2. A gearbox 305 is fitted onto the outer surface of the rotating shaft 302. A large gear 306 is fixedly installed on the outer surface of the rotating shaft 302, located inside the gearbox 305. An oil inlet 307 is opened on the right side of the gearbox 305. A small gear 308 is rotatably connected inside the gearbox 305, meshing with the large gear 306. The gearbox 305 is connected to a conveying pipe 309 on its left side. The end of the conveying pipe 309 away from the gearbox 305 passes through the lubricating oil cylinder 301, the motor housing 1, and the rubber air bag 304 and extends into the interior of the rubber air bag 304. The rotation of the rotating shaft 302 drives the large gear 306 to rotate, which in turn drives the small gear 308 to rotate. Using the principle of a gear pump, a suction force is formed inside the gearbox 305, allowing the lubricating oil inside the lubricating oil cylinder 301 to enter the gearbox 305 through the oil inlet 307 and be sent into the rubber air bag 304 through the conveying pipe 309. As the rubber air bag 304 expands under pressure, it can tightly seal the gap between the sealing cover 2 and the motor housing 1, preventing sewage from entering the interior of the motor housing 1 through the gap. A water inlet cover 5 is fixedly installed on the bottom surface of the lubricating oil cylinder 301. The outer surface of the water inlet cover 5 has water inlets 6 arranged at equal intervals. The water inlet cover 5, together with the water inlets 6, can support the device to a certain height and allow sewage to flow smoothly into the inside of the water inlet cover 5, thus ensuring the normal operation of the sewage pump. The right side of the outer surface of the water inlet hood 5 is fixedly connected to the water outlet pipe 7. The outer surface of the water outlet pipe 7 is fixedly installed with the connecting flange 8. The water outlet pipe 7 allows the sewage pump to discharge sewage smoothly to the outside. The connecting flange 8 allows the staff to connect the drainage pipe to the water outlet pipe 7 so that the sewage can be smoothly pumped to the outside. The sealing cover 2 has six sealing bolts 9 connected to its internal threads. The bottom end of each sealing bolt 9 passes through the sealing cover 2 and extends into the interior of the motor housing 1. Each sealing bolt 9 is fixedly connected to the motor housing 1. The sealing cover 2 can be fixed to the motor housing 1 by using the sealing bolts 9, and it can also provide downward pressure to the rubber sealing ring 303, ensuring the tightness of the connection between the sealing cover 2 and the motor housing 1. A rotor 10 is fixedly installed on the outer surface of the rotating shaft 302, a stator core 11 is fixedly installed on the inner wall of the motor housing 1, and an impeller 12 is fixedly installed at the bottom end of the rotating shaft 302. By using the rotor 10 in conjunction with the stator core 11 and the rotating shaft 302, the impeller 12 can be driven to rotate after the device is powered on, thereby generating suction in the sewage to drain the wastewater. A sealed bearing 13 is fitted on the outer surface of the rotating shaft 302. The inner wall of the motor housing 1 and the inner wall of the lubricating oil cylinder 301 are fixedly connected to the outer surface of the outer ring of the sealed bearing 13. The sealed bearing 13 can seal the gap between the motor housing 1, the lubricating oil cylinder 301 and the rotating shaft 302, while increasing the smoothness of the rotation of the rotating shaft 302 and reducing the wear of the rotating shaft 302. An auxiliary bearing 14 is fitted onto the top of the rotating shaft 302. A connecting seat 15 is fixedly installed on the outer surface of the outer ring of the auxiliary bearing 14. The upper surface of the connecting seat 15 is fixedly connected to the bottom surface of the sealing cover 2. A connecting wire 16 is fixedly installed on the upper surface of the connecting seat 15. The top of the connecting wire 16 passes through the sealing cover 2 and extends to the top of the sealing cover 2. The auxiliary bearing 14, together with the connecting seat 15, can further assist the rotating shaft 302 in rotating, making it less prone to excessive swaying when the top of the rotating shaft 302 rotates, thus greatly increasing the stability of the rotating shaft 302 during rotation. The connecting wire 16 allows the device to be smoothly connected to the power supply.

[0020] The specific implementation method of this embodiment is as follows: First, the rotor 10 is connected to the power supply. At this time, the stator core 11 can drive the rotating shaft 302 and the impeller 12 to rotate, generating suction inside the water inlet cover 5, and discharging sewage out through the water outlet pipe 7. When the rotating shaft 302 rotates, it can drive the large gear 306 to rotate. Therefore, by utilizing the meshing relationship, the large gear 306 can drive the small gear 308 to rotate. Then, by utilizing the principle of the gear pump, suction can be generated inside the gearbox 305, allowing some of the lubricating oil inside the lubricating oil cylinder 301 to enter the gearbox 305 through the oil inlet 307, and then be sent into the rubber air bag 304 through the delivery pipe 309. As the rubber air bag 304 expands under pressure, it can tightly seal the gap between the sealing cover 2 and the motor housing 1, thereby preventing sewage from entering the motor housing 1 through the gap and causing corrosion to the internal facilities of the motor housing 1. The submersible sewage pump, together with the sealing mechanism 3, can effectively increase the self-sealing performance of the submersible sewage pump motor body, making the internal facilities of the motor body less susceptible to corrosion by sewage, and greatly improving the overall service life of the submersible sewage pump motor body.

[0021] Example 2

[0022] Please see Figure 1-6The return mechanism 4 includes a return pipe 401. The left end of the return pipe 401 passes through the lubricating oil cylinder 301 and extends into the interior of the lubricating oil cylinder 301. The top end of the return pipe 401 is fixedly connected to a control cylinder 402. The upper surface of the control cylinder 402 is fixedly connected to an oil inlet pipe 403. The left end of the oil inlet pipe 403 passes through the motor housing 1 and the rubber air bladder 304 in sequence and extends into the interior of the rubber air bladder 304. A conical frame 404 and a connecting frame 405 are fixedly installed on the inner wall of the control cylinder 402. A conical block 406 is snapped into the inside of the conical frame 404. The bottom surface of the conical block 406... A compression spring 407 is fixedly installed, and the bottom end of the compression spring 407 is fixedly connected to the upper surface of the connecting frame 405. The lubricating oil inside the rubber airbag 304 can be introduced into the control cylinder 402 through the oil inlet pipe 403. When the lubricating oil pressure inside the control cylinder 402 is too high, it will squeeze the conical block 406 downward to force the compression spring 407 to contract. At this time, the lubricating oil can flow back into the lubricating oil cylinder 301 through the gap between the conical block 406 and the conical frame 404 and the gap on the connecting frame 405, in conjunction with the return pipe 401, thus balancing the internal pressure of the rubber airbag 304. Four support legs 17 are fixedly installed on the bottom surface of the gearbox 305. The bottom surface of each support leg 17 is fixedly connected to the inner bottom wall of the motor housing 1. The support legs 17 can allow the gearbox 305 to be positioned at a suitable height, and at the same time can fix the stability of the gearbox 305 during use, making the gearbox 305 more stable and reliable during use. Two reinforcing sleeves 18 are fixedly installed on the outer surface of the conveying pipe 309. The right side of each reinforcing sleeve 18 is fixedly connected to the outer surface of the motor housing 1. The reinforcing sleeves 18 can reinforce the conveying pipe 309, so that the conveying pipe 309 will not shake excessively due to excessive internal pressure, thus increasing the stability of the conveying pipe 309 during use. The compression spring 407 has a telescopic rod 19 inside. The telescopic end of the telescopic rod 19 is fixedly connected to the bottom surface of the conical block 406, and the bottom end of the telescopic rod 19 is fixedly connected to the upper surface of the connecting frame 405. The telescopic rod 19 can limit the downward retraction distance of the compression spring 407, so that the conical block 406 will not move too downward, preventing the conical block 406 from detaching from the conical frame 404 and affecting the return of the conical block 406 to its original position.

[0023] The specific implementation method of this embodiment is as follows: the lubricating oil inside the rubber airbag 304 can be introduced into the control cylinder 402 through the oil inlet pipe 403. When the pressure of the lubricating oil inside the control cylinder 402 is too high, it will squeeze the conical block 406 downward to force the compression spring 407 to contract. At this time, the lubricating oil can flow back into the lubricating oil cylinder 301 through the gap between the conical block 406 and the conical frame 404 and the gap on the connecting frame 405, in conjunction with the return pipe 401. Therefore, by using the return mechanism 4 to maintain a certain pressure inside the rubber airbag 304, it can relieve the pressure inside the rubber airbag 304, so that the lubricating oil can circulate and prevent the rubber airbag 304 from rupturing due to excessive internal pressure, thus ensuring the continuous operation of the anti-corrosion self-sealing function of the submersible sewage pump motor body.

[0024] Example 3

[0025] Please see Figure 1-6 The specific implementation method of this embodiment is as follows: First, the rotor 10 is connected to the power supply. At this time, the stator core 11 can drive the rotating shaft 302 and impeller 12 to rotate, generating suction inside the water inlet shroud 5, and discharging sewage out through the water outlet pipe 7. When the rotating shaft 302 rotates, it can drive the large gear 306 to rotate. Therefore, by utilizing the meshing relationship, the large gear 306 can drive the small gear 308 to rotate. Then, by utilizing the principle of the gear pump, suction can be generated inside the gearbox 305, allowing some of the lubricating oil inside the lubricating oil cylinder 301 to enter the gearbox 305 through the oil inlet 307, and then be sent into the rubber air bag 304 through the delivery pipe 309. As the rubber air bag 304 expands under pressure, it can tightly seal the gap between the sealing cover 2 and the motor housing 1, thereby preventing sewage from entering the motor housing 1 through the gap and causing corrosion to the internal facilities of the motor housing 1. This allows the submersible sewage pump to cooperate with the sealing mechanism. 3. This effectively increases the self-sealing performance of the submersible sewage pump motor body, making the internal components less susceptible to corrosion by sewage, and greatly improving the overall service life of the submersible sewage pump motor body. Then, through the oil inlet pipe 403, the lubricating oil inside the rubber air bladder 304 can be introduced into the control cylinder 402. When the lubricating oil pressure inside the control cylinder 402 is too high, it will squeeze the conical block 406 downward, forcing the compression spring 407 to contract. At this time, the lubricating oil can flow back into the lubricating oil cylinder 301 through the gap between the conical block 406 and the conical frame 404 and the gap on the connecting frame 405, in conjunction with the return pipe 401. Therefore, by using the return mechanism 4 to maintain a certain pressure inside the rubber air bladder 304, it can relieve the internal pressure of the rubber air bladder 304, allowing the lubricating oil to circulate, preventing the rubber air bladder 304 from rupturing due to excessive internal pressure, and ensuring the continuous operation of the corrosion-resistant self-sealing function of the submersible sewage pump motor body.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A corrosion-resistant, self-sealing submersible sewage pump motor body, comprising a motor housing (1), characterized in that: A sealing cover (2) is provided on the top of the motor housing (1), a sealing mechanism (3) is provided on the bottom of the motor housing (1), and a return mechanism (4) is provided on the right side of the motor housing (1). The sealing mechanism (3) includes a lubricating oil cylinder (301), inside which a rotating shaft (302) is provided. The top end of the rotating shaft (302) passes through the lubricating oil cylinder (301) and the motor housing (1) in sequence and extends into the interior of the motor housing (1). A rubber sealing ring (303) and a rubber airbag (304) are respectively snapped onto the upper surface of the motor housing (1). Both the rubber sealing ring (303) and the rubber airbag (304) are snapped into the interior of the sealing cover (2). A gearbox (305) is fitted onto the outer surface of the rotating shaft (302). The outer surface of the rotating shaft (302) is fixed. A large gear (306) is installed inside a gearbox (305). An oil inlet (307) is provided on the right side of the gearbox (305). A small gear (308) is rotatably connected inside the gearbox (305). The small gear (308) meshes with the large gear (306). A delivery pipe (309) is fixedly connected to the left side of the gearbox (305). The end of the delivery pipe (309) away from the gearbox (305) passes through the lubricating oil cylinder (301), the motor housing (1), and the rubber air bag (304) in sequence and extends into the interior of the rubber air bag (304). The return mechanism (4) includes a return pipe (401), the left end of which passes through the lubricating oil cylinder (301) and extends into the interior of the lubricating oil cylinder (301). The top end of the return pipe (401) is fixedly connected to a control cylinder (402). The upper surface of the control cylinder (402) is fixedly connected to an oil inlet pipe (403). The left end of the oil inlet pipe (403) passes through the motor housing (1) and the rubber air bladder (304) in sequence and extends into the interior of the rubber air bladder (304). The inner wall of the control cylinder (402) is fixedly installed with a conical frame (404) and a connecting frame (405). A conical block (406) is snapped into the inside of the conical frame (404). A compression spring (407) is fixedly installed on the bottom surface of the conical block (406). The bottom end of the compression spring (407) is fixedly connected to the upper surface of the connecting frame (405).

2. The corrosion-resistant self-sealing submersible sewage pump motor body according to claim 1, characterized in that: The bottom surface of the lubricating oil cylinder (301) is fixedly equipped with a water inlet cover (5), and the outer surface of the water inlet cover (5) is provided with water inlets (6) arranged at equal intervals.

3. The corrosion-resistant self-sealing submersible sewage pump motor body according to claim 2, characterized in that: The water inlet cover (5) has a water outlet pipe (7) fixedly connected to the right side of its outer surface, and a connecting flange (8) is fixedly installed on the outer surface of the water outlet pipe (7).

4. The corrosion-resistant self-sealing submersible sewage pump motor body according to claim 1, characterized in that: The sealing cover (2) has six sealing bolts (9) connected to its internal threads. The bottom end of each sealing bolt (9) passes through the sealing cover (2) and extends into the interior of the motor housing (1). Each sealing bolt (9) is fixedly connected to the motor housing (1).

5. The corrosion-resistant self-sealing submersible sewage pump motor body according to claim 1, characterized in that: The rotor (10) is fixedly installed on the outer surface of the rotating shaft (302), the stator core (11) is fixedly installed on the inner wall of the motor housing (1), and the impeller (12) is fixedly installed at the bottom end of the rotating shaft (302).

6. The corrosion-resistant self-sealing submersible sewage pump motor body according to claim 1, characterized in that: The outer surface of the rotating shaft (302) is fitted with a sealed bearing (13), and the inner wall of the motor housing (1) and the inner wall of the lubricating oil cylinder (301) are fixedly connected to the outer surface of the outer ring of the sealed bearing (13).

7. The corrosion-resistant self-sealing submersible sewage pump motor body according to claim 1, characterized in that: An auxiliary bearing (14) is fitted at the top of the rotating shaft (302). A connecting seat (15) is fixedly installed on the outer surface of the outer ring of the auxiliary bearing (14). The upper surface of the connecting seat (15) is fixedly connected to the bottom surface of the sealing cover (2). A connecting line (16) is fixedly installed on the upper surface of the connecting seat (15). The top end of the connecting line (16) passes through the sealing cover (2) and extends to the top of the sealing cover (2).

8. The corrosion-resistant self-sealing submersible sewage pump motor body according to claim 1, characterized in that: The bottom surface of the gearbox (305) is fixedly equipped with four support legs (17), and the bottom surface of each support leg (17) is fixedly connected to the inner bottom wall of the motor housing (1).

9. The corrosion-resistant self-sealing submersible sewage pump motor body according to claim 1, characterized in that: Two reinforcing sleeves (18) are fixedly installed on the outer surface of the conveying pipe (309), and the right side of each reinforcing sleeve (18) is fixedly connected to the outer surface of the motor housing (1).

10. The corrosion-resistant self-sealing submersible sewage pump motor body according to claim 1, characterized in that: The compression spring (407) is provided with a telescopic rod (19) inside. The telescopic end of the telescopic rod (19) is fixedly connected to the bottom surface of the cone block (406), and the bottom end of the telescopic rod (19) is fixedly connected to the upper surface of the connecting frame (405).

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