Submersible motor, submersible pump and mute water pumping device

Abstract

The utility model discloses a submersible motor, a submersible pump and a mute water pumping device, the submersible motor comprises a motor casing, a stator and a rotor, the stator and the rotor are assembled in the motor casing, the rotor is coaxially assembled in the stator, the rotor is provided with a motor shaft, a sealing pipe fitting which is sleeved on the rotor in a sealing manner is arranged in the motor casing, and the stator and the rotor are isolated by the sealing pipe fitting. The submersible pump comprises a pump shell, an impeller and the submersible motor, the submersible motor is assembled in the pump shell, the impeller is connected to the end of a motor shaft, and a water inlet is formed in the bottom, close to the impeller, of the pump shell. The mute water pumping device comprises a main machine, a water pipe and the submersible pump, wherein the main machine is connected with a pump shell of the submersible pump through the water pipe. The utility model provides a submersible motor, a submersible pump and a mute water pumping device, which can improve the sealing waterproof performance of the submersible motor, ensure that water cannot enter the motor and prolong the service life of the water pump. The mute water pumping device using the submersible pump has the advantages of large flow and low noise.

Description

Technical Field

[0001] The utility model relates to the technical field of water pumps, in particular to a submersible motor, a submersible pump and a silent water pump which can be used for extracting bottled water. Background Art

[0002] A motor is a device that converts electrical energy into mechanical energy. It primarily consists of a stator and a rotor. The stator generates a rotating magnetic field, driving the rotor, which, in turn, has a motor shaft that outputs power as it rotates. Motors are widely used in our daily lives. For example, when drinking bottled water, a motor can be used as a power source to drive a water pump to draw water from the bottle for drinking. Commercially available water pumps often use diaphragm pumps, which generate negative pressure through the vibration of the diaphragm to pump water up the bottle. These pumps are noisy and can disrupt the daily lives of nearby residents. Diaphragm pumps also have a low flow rate, resulting in longer wait times when filling large cups. Water pumps that use submersible pumps can reduce pumping noise. When submerged in water, the front and rear end caps of the motor are sealed to the housing primarily by sealing rings, gaskets, or sealant. Silicone seals are fitted to the motor shaft, extending beyond the end caps, creating a tight, waterproof seal. However, frequent and prolonged use of submersible pumps can cause wear and tear on the motor shaft and silicone components, leading to deformation and gaps between the silicone components and the shaft. Water can seep into the motor through these gaps, causing a short circuit and burnout, shortening the pump's lifespan. Water pumps using brushless motors are large, making them unable to directly accommodate covered or small-bore water bottles. Utility Model Content

[0003] The utility model provides a submersible motor, a submersible pump and a silent water pump. The sealing pipe is sealed on the rotor to achieve physical isolation between the stator and the rotor. Even if water seeps into the gap around the motor shaft, it will not enter the interior of the motor and contact the stator and other electrical parts, thereby improving the sealing and waterproof performance of the submersible motor and extending the service life of the submersible motor and the submersible pump. The silent water pump using the submersible pump has the advantages of good waterproofness, large flow rate and low noise.

[0004] In order to solve the above technical problems, the technical solution provided by the utility model is: a submersible motor, including a motor housing, a stator and a rotor assembled in the motor housing, the rotor being coaxially assembled in the stator, the rotor being provided with a motor shaft, and a sealing pipe fitting being sealed on the rotor in the motor housing, the sealing pipe fitting isolating the stator and the rotor.

[0005] This utility model utilizes the aforementioned technical solution. The stator generates a rotating magnetic field to drive the rotor, which in turn drives the motor shaft, outputting rotary power through the motor shaft. A sealing tube fits over the rotor, sealing it and isolating the rotor from the stator, further enhancing the submersible motor's waterproof performance. Even if water seeps into the gaps around the motor shaft during use, it is confined within the sealing tube and prevented from entering the motor housing and contacting the stator or electrical components of the submersible motor. This ensures the submersible motor's waterproof seal and effectively extends its service life.

[0006] The sealing pipe assembly of the aforementioned submersible motor includes a steel pipe seat, an inner steel pipe, and a shaft seat. The steel pipe seat and shaft seat are detachably mounted at each end of the inner steel pipe. The rotor is assembled within the inner steel pipe, and the motor shaft extends through the steel pipe seat. The steel pipe seat and shaft seat are assembled in a sealed manner at each end of the inner steel pipe, isolating the inner steel pipe from the outside. Even if water seeps into the gap between the motor shaft and the steel pipe seat, the water will not flow out of the other end of the inner steel pipe and into the interior of the motor housing, thereby enhancing the waterproof effect and ensuring the safety of the motor during use.

[0007] In the above-mentioned submersible motor, the steel pipe seat is provided with a motor sleeve, and the motor shaft is rotatably arranged in the motor sleeve. The motor sleeve plays a role in supporting the rotation of the motor shaft.

[0008] In this submersible motor, an axially extending centering shaft is located inside the shaft housing. This shaft is coaxial with the rotor and can be inserted into the rotor. The centering shaft supports and positions the rotor for rotation, ensuring that the rotor and the motor shaft mounted thereon remain coaxial with the stator when the rotating magnetic field generated by the stator drives the rotor.

[0009] The motor housing of the aforementioned submersible motor comprises an outer steel tube, a front cover and a rear cover removably attached to each end of the outer steel tube, and a steel tube seat located inside the front cover. After assembly, the steel tube seat fits onto the front cover, securing the sealing tube assembly within the motor housing. This maintains the coaxiality of the rotor and the motor housing, preventing rotor deflection during rotation, reducing vibration and noise.

[0010] In the aforementioned submersible motor, a shaft seal is installed between the front cover and the steel pipe seat, surrounding the outer circumference of the motor shaft. The shaft seal has a cavity filled with food-grade grease for sealing. The grease in the cavity of the shaft seal rotates when the submersible motor is in operation, and the grease blocks water from seeping in from the motor shaft edge, further enhancing the waterproofing effect.

[0011] The thickness of the outer and inner steel tubes of the aforementioned submersible motor is 0.2 mm. Setting the thickness of the outer and inner steel tubes to 0.2 mm allows the inner and outer steel tubes to have relatively small diameters. The inner steel tube, when fitted over the rotor and having a small thickness, does not occupy much of the gap between the stator and rotor. This eliminates the need to oversize the inner diameter of the stator, thereby reducing the inner diameter of the stator and the overall size. The inner diameter of the outer steel tube can be selected based on the actual dimensions of the assembled stator and rotor. The outer steel tube's small thickness of 0.2 mm does not increase the outer diameter of the motor housing while maintaining its inner diameter. This results in a submersible motor with a small diameter that easily fits into the mouth of a bottled water container.

[0012] The stator of the aforementioned submersible motor includes a stator core, a stator coil, and a coil support. The stator coil is fixed to the coil support, and the stator core is sleeved around the outer periphery of the stator coil. The stator coil of this submersible motor is independent of the stator core and does not need to be wound around the stator core. Instead, the stator core sleeves around the outer periphery of the stator coil, securing the stator coil. By separating the stator coil from the stator core, the stator coil does not need to be wound around the stator core. Instead, the stator core can be manufactured according to the structure of the formed stator coil and sleeved around the outer periphery of the stator coil, effectively reducing the size of the stator and, in turn, the overall size of the submersible motor.

[0013] The utility model also provides another technical solution: a submersible pump comprising a pump casing, an impeller, and the aforementioned submersible motor. The submersible motor is assembled within the pump casing, the impeller is connected to the end of the motor shaft, and a water inlet is provided at the bottom of the pump casing near the impeller. When the submersible motor is in operation, the motor shaft drives the impeller to rotate, and the rotation of the impeller drives the water flow, causing water to enter the pump casing through the water inlet.

[0014] Another technical solution provided by the present invention is a silent water pump comprising a main unit, a water pipe, and the aforementioned submersible pump, the main unit being connected to the pump casing of the submersible pump via the water pipe. The present invention places the submersible pump within barreled water, using the water as a silencing medium, significantly reducing noise generated during operation. Furthermore, the impeller-driven water flow pumping method also minimizes significant noise, resulting in excellent silencing performance.

[0015] The beneficial effects achieved by the present invention are as follows: a sealing pipe is mounted on the rotor of the submersible motor to isolate the stator from the rotor, effectively improving the sealing and waterproof effect of the submersible motor. Even if water enters the rotor from the gap around the motor shaft during long-term use, it is confined in the sealing pipe and will not enter the interior of the motor casing to cause a short circuit fault. The motor shaft is used to directly drive the impeller, and the impeller drives the surrounding water to flow and enter the pump casing. The submersible pump is placed in barreled water, which greatly reduces and isolates the noise generated by the submersible pump during actual pumping, so that the water pump has a good silent effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a submersible motor according to an embodiment of the present utility model;

[0017] Figure 2 yes Figure 1 A schematic cross-sectional structure diagram of a submersible motor in the AA direction according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the assembly structure of a submersible motor according to an embodiment of the present utility model;

[0019] Figure 4 This is a schematic diagram of the exploded structure of a submersible motor according to an embodiment of the present utility model;

[0020] Figure 5 This is a structural diagram of a submersible pump according to an embodiment of the present utility model;

[0021] Figure 6 yes Figure 5 A schematic cross-sectional structure diagram of a submersible pump in the BB direction according to an embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the exploded structure of a submersible pump according to an embodiment of the present utility model;

[0023] Figure 8 This is a structural diagram of a silent water pump according to an embodiment of the present utility model;

[0024] Figure 9 This is a schematic cross-sectional view of a silent water pump according to an embodiment of the present invention;

[0025] Figure 10 This is a schematic diagram of the explosion structure of a main unit of a silent water pump according to an embodiment of the present utility model;

[0026] Figure 11 This is a schematic diagram of the connection structure between the water pipe and the outlet pipe inside a silent water pump according to an embodiment of the present utility model;

[0027] Figure 12 yes Figure 11 Schematic diagram of the cross-section structure in ;

[0028] Figure 13 This is a structural diagram of a silent water pump according to an embodiment of the present invention, wherein a submersible pump is placed into the mouth of a barreled water bucket;

[0029] Figure 14 This is a schematic diagram of a silent water pump in use in an embodiment of the utility model when it is installed in a barreled water bucket.

[0030] Description of the accompanying drawings: submersible motor 1a, motor housing 11, outer steel pipe 111, front cover 112, rear cover 113, stator 12, stator core 121, stator coil 122, coil bracket 123, circuit board 124, rotor 13, rotor core 131, magnet 132, motor shaft 14, shaft seal 15, cavity 151, sealing pipe 2, steel pipe seat 21, inner steel pipe 22, shaft seat 23, motor sleeve 24, centering shaft 25, submersible pump 3a, pump housing 31, impeller 32, water inlet 33, Upper cover 34, lower cover 35, host 4, host casing 41, host cover body 42, host surface cover 43, inner cover decorative part 44, product mainboard 45, soft-glue transparent button 46, power cord 47, host inner casing 411, battery 412, line water separator 41b, line water separator lower cover 413, line water separator sealing soft glue 414, line water separator upper cover 415, water outlet pipe 41a, water outlet hose 1 416, adapter 417, water outlet hose 2 418, water outlet 419, water pipe 5, bottled water bucket 6. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] Reference Figures 1 to 4 As shown, a submersible motor comprises a motor housing 11, a stator 12 assembled within the motor housing 11, and a rotor 13. The rotor 13 is coaxially assembled within the stator 12 and is provided with a motor shaft 14. A sealing pipe 2 is provided within the motor housing 11, sealingly fitting around the rotor 13 and isolating the stator 12 from the rotor 13. The sealing pipe 2 includes a rotor core 131 and magnets 132 encased within the rotor core 131. When the stator 12 generates a rotating magnetic field, this magnetic field drives the magnets 132 and the rotor core 131 to rotate, causing the motor shaft 14, connected to the rotor core 131, to rotate accordingly and output power. The front and rear covers 112 and 113 of the motor housing 11 can be sealed using glue, sealing gaskets, or sealing strips. When the submersible motor operates underwater, the motor shaft 14 extends beyond the end covers of the motor housing 11, making the seal between the motor shaft 14 and the end covers of the motor housing 11 crucial. In this embodiment, a sealing pipe 2 is provided, which is sealed and sleeved on the rotor 13, so that the stator 12 and the rotor 13 inside the motor housing 11 are isolated from each other. Even if water outside the motor housing 11 enters the interior through the peripheral gap of the motor shaft 14, the entered water is confined in the sealing pipe 2 and will not enter the stator 12, thereby effectively improving the sealing and waterproof effect of the submersible motor.

[0033] The structure of the sealing tube 2 can be that one end facing the inside of the motor housing 11 is closed and the other end facing the outside of the motor housing 11, that is, the direction in which the motor shaft 14 extends, is open, and it is assembled on the front end cover 112 of the motor housing 11; or the rotor 13 can be assembled in the sealing tube 2 and then integrally formed, leaving a through hole so that the motor shaft 14 can extend and rotate freely.

[0034] In this embodiment, the sealing pipe 2 includes a steel pipe seat 21, an inner steel pipe 22, and a shaft seat 23. The steel pipe seat 21 and the shaft seat 23 are detachably mounted at both ends of the inner steel pipe 22. The rotor 13 is assembled in the inner steel pipe 22, and the motor shaft 14 extends out of the steel pipe seat 21. The shaft seat 23 and the steel pipe seat 21 are respectively assembled at the front and rear ends of the inner steel pipe 22. During assembly, sealant can be injected to bond and seal the two together, preventing water entering the inner steel pipe 22 from outside from escaping through the gap between the shaft seat 23 and the inner steel pipe 22. In other embodiments, the seal between the shaft seat 23, the steel pipe seat 21, and the inner steel pipe 22 can also be achieved by providing sealing strips, sealing washers, or other methods, depending on the actual processing and manufacturing process.

[0035] In this embodiment, the steel pipe seat 21 is provided with a motor sleeve 24, in which the motor shaft 14 is rotatably mounted. An axially extending centering shaft 25 is provided on the inner side of the shaft seat 23. The centering shaft 25 is coaxial with the rotor 13 and can be inserted into the rotor 13. A through hole is provided at the rear end of the rotor 13 for inserting the centering shaft 25. The centering shaft 25 and the rotor 13 remain coaxial, ensuring that when the rotor 13 is driven to rotate by the rotating magnetic field of the stator 12, the rotor 13 rotates stably and does not deflect. The motor sleeve 24 is provided to support the rotational motion of the motor shaft 14. The motor sleeve 24, the centering shaft 25, the rotor 13, and the stator 12 are coaxial, so that when the rotor 13 rotates, deflection and vibration will not occur, thereby reducing the operating noise of the submersible motor.

[0036] In this embodiment, the motor housing 11 includes an outer steel pipe 111, a front cover 112 and a rear cover 113 detachably mounted on both ends of the outer steel pipe 111, and a steel pipe seat 21 is mounted inside the front cover 112. Figure 2 As shown, one end of the motor shaft 14 is fixedly connected to the rotor 13, and the other end axially passes through the steel pipe seat 21 and the front end cover 112, extending outside the motor housing 11. The steel pipe seat 21 and the front end cover 112 can be connected by threads or glue, and can be sealed with sealant, a sealing gasket, or a sealing strip. The thickness of the outer steel pipe 111 and the inner steel pipe 22 is 0.2 mm.

[0037] To improve the sealing of the motor shaft 14 during rotation, a shaft seal 15 is installed between the front cover 112 and the steel pipe seat 21. The shaft seal 15 has a cavity 151, which is filled with food-grade grease for sealing. As the motor shaft 14 rotates, it drives the food-grade grease in the cavity 151, which flows as the motor shaft 14 rotates. The concentration of grease is greater than that of water. Even if some water seeps through the gap between the motor shaft 14 and the front cover 112, the flowing grease can prevent the water from entering the interior of the motor housing 11, achieving a better sealing effect.

[0038] In this embodiment, the stator 12 comprises a stator core 121, a stator coil 122, and a coil support 123. The stator coil 122 is fixed to the coil support 123, and the stator core 121 is sleeved around the stator coil 122. A circuit board 124 is mounted on the coil support 123. The stator core 121, stator coil 122, stator support 123, and circuit board 124 constitute the electrical components of the submersible motor. The stator coil 122 is independent of the stator core 121. The stator coil 122 is wound independently of the stator core 121, forming a stator winding. When power is applied, the stator coil 122 generates a rotating magnetic field within the enclosed internal cavity. The rotor 13 is assembled within the internal cavity enclosed by the stator coil 122. In this embodiment, the stator coil 122 is independently wound to form a hollow cylindrical structure, one end of which is fixed to the coil bracket 123. The input and output leads of the stator coil 122 are fixed to the coil bracket 123 and connected to the circuit board 124. The circuit board 124 serves to connect the power line to conduct the stator coil 122 and the power supply. The stator core 121 is configured as a sleeve structure, which is sleeved on the periphery of the stator coil 122 to fix and protect the stator coil 122. The overall size of the stator coil 122 and the stator core 121 of the embodiment of the utility model after assembly is small, and its radial size is reduced. When assembled in the motor housing 11, it can effectively reduce the radial size of the motor housing 11 so that it can pass through the through hole of the bottle mouth of the bottled water.

[0039] Reference Figures 5 to 7 As shown, a submersible pump includes a pump housing 31, an impeller 32, and the submersible motor 1a described in the above embodiment. The submersible motor 1a is assembled within the pump housing 31. The impeller 32 is connected to the end of the motor shaft 14. A water inlet 33 is provided at the bottom of the pump housing 31 near the impeller 32. An upper cover 34 and a lower cover 35 are detachably connected to the ends of the pump housing 31, respectively. The water inlet 33 is provided on the bottom side of the lower cover 35.

[0040] The submersible motor 1a is assembled within the pump housing 31. The upper cover 34 can be coaxially connected to the rear end cover 113 of the submersible motor 1a, while the lower cover 35 can be coaxially connected to the front end cover 112 of the submersible motor 1a. This ensures that the submersible motor 1a is positioned within the pump housing 31. During operation, the motor shaft 14 drives the impeller 32 to rotate, preventing the submersible motor 1a from vibrating within the pump housing 31. In other embodiments, the outer walls of the front and rear ends of the submersible motor 1a can abut against the inner walls of the pump housing 31, securing the submersible motor 1a. A gap is created between the pump housing 31 and the outer steel pipe 111, front end cover 112, and rear end cover 113 of the submersible motor 1a. This allows the impeller 32 to rotate, driving water from the bottom of the pump housing 31, through the submersible motor 1a, and into the water pipe 5.

[0041] Reference Figures 8 to 12 As shown, a silent water pump includes a main unit 4, a water pipe 5 and the above-mentioned submersible pump 3a. The main unit 4 is connected to the pump housing 31 of the submersible pump 3a through the water pipe 5.

[0042] like Figure 10-12 As shown, the main unit 4 includes a main housing 41, a main cover 42, a main cover 43, a product main board 45, and a water outlet pipe 41a. The main cover 42 is mounted on the main housing 41, with an inner cover decorative member 44 disposed between the main cover 43 and the main cover 42. The product main board 45 is provided with a soft-glue transparent button 46, which protrudes from the surface of the main cover 43. A water outlet portion radially extends from one end of the main cover 42, and is provided with a water outlet 419. The water outlet 419 is connected to the water outlet pipe. Water pumped by the submersible pump 3a passes through the water outlet pipe 41a and flows out of the water outlet 419.

[0043] The main housing 41 houses an inner housing 411, a battery 412, a lower cover 413 for the water separator, a soft sealant 414 for the water separator, and an upper cover 415 for the water separator. A water outlet pipe 41a is located within the main housing 41. The battery 412, located within the inner housing 411, connects to the mainboard 45. This mainboard 45 is connected to the circuit board 24 within the submersible motor 1a via a power cord 47. The battery 412 provides power. The mainboard 45 controls the start and stop of the submersible motor 1a via a transparent soft-glue button 46. For easy operation, when drinking water is needed, pressing the transparent soft-glue button 46 once triggers the mainboard 45 to sense the operation command. This then connects the circuit board 24 via the power cord 47, energizing the submersible motor 1a and drawing drinking water from the bottled water. The user then places a cup at the water outlet 419 to collect the water. Pressing the transparent soft-glue button 46 again disconnects the mainboard 45 from the submersible motor 1a, stopping the pumping process.

[0044] Reference Figure 11 and Figure 12As shown, the line-water separator lower cover 413, the line-water separator sealing soft glue 414 and the line-water separator upper cover 415 constitute the line-water separator 41b, which is used to separate the water pipe 5 and the power cord 47. Among them, the power cord 47 is located inside the water pipe 5, the line-water separator 41b is sleeved on the outside of the water pipe 5, the power cord 47 extends from the side wall of the water pipe 5, and the power cord 47 extends from the side wall of the line-water separator sealing soft glue 414 to connect to the product mainboard 45. Then, the line-water separator upper cover 415 and the line-water separator lower cover 413 press the line-water separator sealing soft glue 414 against each other to separate the power cord 47 from the water pipe 5 and ensure the seal at the separation position of the power cord 47 and the water pipe 5.

[0045] The water outlet pipe 41a includes a first water outlet hose 416, an adapter 417, a second water outlet hose 418, and a water outlet 419. The first water outlet hose 416 is connected to the top of the water pipe 5. The adapter 417 is used to connect the first water outlet hose 416 and the second water outlet hose 418. The water outlet 419 is connected to the second water outlet hose 418. Through the adapter 417, the first water outlet hose 416 and the second water outlet hose 418 guide drinking water from the water pipe 5 into the water outlet pipe 41a and ultimately out of the water outlet 419. The opening of the water outlet 419 faces downward, making it convenient for users to collect water without having to adjust the opening of the cup.

[0046] In a silent water pump according to an embodiment of the present invention, a main unit 4 is connected to a submersible pump 3a having a submersible motor 1a through a water pipe 5, so that the silent water pump has good sealing performance during use and can be used underwater for a long time and frequently on and off without water entering the motor and causing the motor to burn out, thereby effectively extending the quality and service life of the product. The motor housing 11 of the submersible motor 1a is filled with sealing glue between the front cover 112 and the rear cover 113 to achieve the first sealing barrier inside the motor. Through the sealing between the shaft seal 15 and the motor shaft 14, the cavity 151 is filled with food-grade grease, and the rotating flowing grease is used to hinder the infiltrating water, thereby achieving another barrier to seal the motor shaft 14. The rotor 13 and stator 12 are physically isolated by the sealing tube 2, which seals the interior of the sealing tube 2. Even if the silicone shaft seal 15 deforms after prolonged use and some water seeps into the sealing tube 2, the water will not escape from the sealing tube 2, providing another barrier to the motor shaft 14. This shows that the excellent sealing performance of the submersible motor 1a effectively extends the service life of the water pump.

[0047] Using a submersible pump to pump water, and utilizing water as a natural sound-absorbing medium, the noise of the water pump, which already has low vibration and noise, is further weakened. The noise of this silent water pump during operation is even less than the sound of water being collected in a cup, and it is suitable for various occasions in life and work without disturbing others.

[0048] This silent water pump utilizes the rotation of impeller 32 at the bottom of pump housing 31 to drive water flow. The water swirls within pump housing 31, and the water surrounding impeller 32 continuously rotates and rises along the inner wall of pump housing 31, pouring into water pipe 5. The water continues to rise, eventually flowing out of outlet 419 and into a water cup located below. During operation, submersible pump 3a is directly driven by submersible motor 1a to rotate impeller 32. Impeller 32 and rotor 13 move together as a single unit, eliminating redundant transmission mechanisms. Impeller 24 directly works on the water, resulting in minimal energy loss and high pumping efficiency. This reduces vibration and noise while increasing water flow compared to traditional diaphragm pumps, reaching 3-4 times the water flow of diaphragm pumps. In this embodiment, a high-efficiency 5-blade impeller can be used, and an 18650 lithium battery with a rated voltage of 3.7V is used for power supply. It can pump 3-4 liters of water per minute, and the water flow rate is 3-4 times that of a traditional diaphragm pump. A 300ml cup of water can be filled in 2-5 seconds.

[0049] The stator coil 122 is independent of the stator core 121. The stator coil 122 itself is wound to form the stator winding, without being wound around the stator core 121. The stator core 121 is configured to match the tubular structure of the stator coil 122 and fits around the outer periphery of the stator coil 122, securing and protecting the stator coil 122. The stator coil 122 is assembled separately from the stator core 121 as a single component. This allows assembly even with a small stator core 121, resolving the issue of a small core making coil winding difficult for the machine.

[0050] In this embodiment, the outer steel tube 111 is made of stainless steel with high structural strength and can be set to a thickness of approximately 0.2 mm. This ensures the structural strength of the motor housing 11 while significantly reducing the size of the motor. This results in a smaller submersible motor 1a. The thickness of the outer steel tube 111, inner steel tube 22, and pump housing 31 is set to 0.2 mm. During assembly, the stator coil 122 is separated from the stator core 121, significantly reducing the diameter of the assembled stator. The inner steel tube 22 is 0.2 mm thick, which does not significantly occupy the gap between the rotor 13 and the stator 12. The outer steel tube 111, which is assembled outside the stator 12 and serves as the main motor housing, is also set to 0.2 mm thick, minimizing the diameter of the submersible motor 1a when the stator 12 and rotor 13 are assembled into the motor housing 11. Similarly, the thickness of the pump housing 31 is 0.2 mm and it is made of stainless steel. To reduce the thickness of the pump housing 31, the inner diameter of the pump housing 31 is set to be slightly larger than the diameter of the submersible motor 1a, so that the submersible pump 3a of this embodiment has a small thickness and a small diameter. Figure 13As shown, in one embodiment, the diameter D of the submersible pump 3a is 17.6 mm, and the diameter R of the barrel mouth of the bottled water bucket 6 is 18 mm. The submersible pump 3a can pass through the barrel mouth of the bottled water bucket conveniently and quickly without removing the barrel cover.

[0051] The outer steel pipe 111 is made of 304 food grade stainless steel and is manufactured using a capillary process. The diameter of a bottle mouth of bottled water is approximately 18 mm, and the diameter of the submersible pump 3a of this embodiment is 17.6 mm, which can easily fit into most bottled water.

[0052] However, conventional processes using materials such as plastic to manufacture the motor housing 11 and the sealing pipe 2 cannot meet the 0.2mm thickness requirement for the pump housing, motor housing 11, and sealing pipe 2. Submersible pumps manufactured using conventional plastic materials have a diameter greater than 18mm and cannot fit into a bottled water tank. The tank cap must be removed to connect the pump to the main unit through the water pipe, which is inconvenient.

[0053] like Figure 14 The figure shows the silent water pump of this embodiment placed in a bottled water bucket 6 for pumping water. When the main unit 4 is in operation, it drives the submersible motor 1a to rotate, which in turn drives the impeller 32 connected to it. This causes water to enter the pump housing 31 through the water inlet 33 of the submersible pump 3a and be pumped through the water pipe 5 to the water outlet 419.

[0054] Reference Figure 1-12 As shown, during the assembly of the submersible motor 1a, the shaft seat 23 is assembled onto the rear end of the inner steel tube 22, with sealant used to bond and seal the two together. A centering shaft 25 is located inside the shaft seat 23. When the rotor 13 is installed, the centering shaft 25 is inserted into the rear end of the rotor 13. The magnets 132 of the rotor 13 are wrapped around the outer circumference of the rotor core 131. When the stator 12 is energized and generates a rotating magnetic field, they sense this magnetic field and cause rotation. The steel tube seat 21 is then assembled onto the front end of the inner steel tube 22, and the motor shaft 14 extends through the steel tube seat 21 and out of the motor housing 11. The stator coil 122 is wound to form the stator winding. The stator core 121 is assembled onto the outer circumference of the stator coil 122. One end of the stator coil 122 is fixed to a coil support 123, and the leads of the stator coil 122 are connected to a circuit board 124 mounted on the coil support 123. The assembled rotor 13 and the sealing pipe 2 are then inserted into the stator 12 , with the sealing pipe 2 located between the stator coil 122 and the rotor 13 , thereby achieving physical isolation between the stator 12 and the rotor 13 .

[0055] The stator 12, rotor 13 and sealing pipe 2 are placed in the outer steel pipe 111. The front end of the outer steel pipe 111 is assembled with a front end cover 112, and the motor shaft 14 passes through the front end cover 112. A shaft seal 15 is set between the front end cover 112 and the steel pipe seat 21 to achieve sealing of the motor shaft 14. The steel pipe seat 21 is connected to the front end cover 112, and can be bonded and sealed by pouring glue. Sealing glue is poured into the outer steel pipe 111, and then the rear end cover 113 is assembled at the rear end of the outer steel pipe 111. The sealing glue is filled in the space enclosed by the steel pipe seat 21, the outer steel pipe 111, and the rear end cover 113. The sealing glue fills the cavity inside the submersible motor. After the glue solidifies, the electrical part of the motor is well waterproofed, and water will not enter the motor to cause a short circuit.

[0056] Among them, the submersible motor 1a of the present invention preferably uses a brushless motor.

[0057] After the motor is assembled, the motor shaft 14 of the submersible motor 1a is connected to the impeller 32 and then placed into the pump housing 31. The submersible motor 1a is coaxially fixed to the pump housing 31 by the front cover 112 or the rear cover 113 mating with the inner wall of the pump housing 31. The submersible pump 3a is placed in a bottle of water, with the impeller 32 near the water inlet 33. The motor shaft 14 drives the impeller 32 to rotate. The rotation of the impeller 32 generates centrifugal force, which drives the water entering the pump housing 31 through the water inlet 33. The water flows in a rotating flow following the rotation of the impeller 32. The water continuously rises along the inner wall of the pump housing 31, passes through the water pipe 5, and then flows out of the water outlet 419 of the water outlet pipe 41a, falling into the water cup placed below.

[0058] In summary, the present invention has been manufactured into actual samples and tested multiple times in accordance with the description and illustrations. The results of the test results show that the present invention can achieve its intended purpose and its practical value is beyond doubt. The above embodiments are only used to illustrate the present invention and are not intended to limit the present invention in any form. Any person with ordinary knowledge in the relevant technical field can, without departing from the scope of the technical features of the present invention, make partial changes or modifications to the technical content disclosed in the present invention and make equivalent embodiments without departing from the technical features of the present invention. These modifications are still within the scope of the technical features of the present invention.

Claims

1. A submersible motor comprising a motor housing (11), a stator (12) and a rotor (13) assembled in the motor housing (11), wherein the rotor (13) is coaxially assembled in the stator (12), and the rotor (13) is provided with a motor shaft (14), characterized in that: A sealing pipe (2) is provided in the motor housing (11) and is sealedly sleeved on the rotor (13). The sealing pipe (2) isolates the stator (12) and the rotor (13).

2. The submersible motor according to claim 1, characterized in that: The sealing pipe member (2) comprises a steel pipe seat (21), an inner steel pipe (22) and a shaft seat (23). The steel pipe seat (21) and the shaft seat (23) are detachably arranged at both ends of the inner steel pipe (22). The rotor (13) is assembled in the inner steel pipe (22), and the motor shaft (14) extends out of the steel pipe seat (21).

3. The submersible motor according to claim 2, characterized in that: The steel pipe seat (21) is provided with a motor shaft sleeve (24), and the motor shaft (14) is rotatably disposed in the motor shaft sleeve (24).

4. The submersible motor according to claim 2, characterized in that: An axially extending centering shaft (25) is provided on the inner side of the shaft seat (23). The centering shaft (25) is coaxial with the rotor (13) and can be inserted into the interior of the rotor (13).

5. The submersible motor according to claim 2, characterized in that: The motor housing (11) comprises an outer steel pipe (111), a front end cover (112) and a rear end cover (113) detachably arranged at both ends of the outer steel pipe (111), and the steel pipe seat (21) is arranged on the inner side of the front end cover (112).

6. The submersible motor according to claim 5, characterized in that: A shaft seal (15) is provided between the front end cover (112) and the steel pipe seat (21) and is sleeved on the outer periphery of the motor shaft (14). The shaft seal (15) is provided with a cavity (151) into which food-grade grease for sealing is injected.

7. The submersible motor according to claim 5, characterized in that: The thickness of the outer steel tube (111) and the inner steel tube (22) is 0.2 mm.

8. The submersible motor according to any one of claims 1 to 7, characterized in that: The stator (12) comprises a stator core (121), a stator coil (122) and a coil support (123); the stator coil (122) is fixed on the coil support (123); and the stator core (121) is sleeved on the outer periphery of the stator coil (122).

9. A submersible pump, characterized in that: The submersible motor (1a) comprises a pump casing (31), an impeller (32) and the submersible motor (1a) according to any one of claims 1 to 8, wherein the submersible motor (1a) is assembled in the pump casing (31), the impeller (32) is connected to the end of the motor shaft (14), and the pump casing (31) is provided with a water inlet (33) near the bottom of the impeller (32).

10. A silent water pump, characterized by: The invention comprises a main unit (4), a water pipe (5), and the submersible pump (3a) according to claim 9, wherein the main unit (4) is connected to the pump casing (31) of the submersible pump (3a) through the water pipe (5).

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