An oil-filled deep water motor

Abstract

The application relates to the technical field of underwater power equipment, in particular to an oil-filled deep-water motor which comprises a motor shell, a main shaft, a rotor assembly fixedly connected with the main shaft and a stator assembly fixedly connected with the motor shell, the motor shell comprises a shaft extension end cover, a shaft extension end snap ring, a shaft extension end fitting ring, a seamless pipe casing, a wiring end fitting ring, a wiring end snap ring, a connecting frame and a wiring end cover which are sequentially arranged, one side of the rotor assembly close to the shaft extension end is provided with a mechanical seal, the connecting frame is provided with a wiring hole through which power supply wires of the stator assembly pass, the wiring end cover is provided with a first lead-out hole through which a power cable composed of the power supply wires of the stator assembly passes, the first lead-out hole is provided with a cable seal, the mechanical seal and the cable seal separate the inside of the motor shell from the outside environment, and the inside of the motor shell is filled with mineral oil. The application has the effect of being capable of operating in a deep-water environment.

Description

Technical Field

[0001] The present application relates to the technical field of underwater power equipment, and in particular to an oil-filled deep-water motor. Background Art

[0002] Deepwater motors are designed to operate in deepwater environments. This typically refers to underwater areas deeper than a certain distance (e.g., 1,000 meters). These motors must be able to withstand high pressure, high temperature, and other harsh conditions, and must be waterproof and corrosion-resistant.

[0003] The 2,500-meter ultra-deepwater pile hammer system is a highly complex equipment that integrates mechanical, electrical, hydraulic, control, communication and other technologies, involving multiple disciplines such as marine science and geology.

[0004] The ultra-deepwater pile hammer system development project plans to use a 2,500-meter underwater power station to transmit electricity, compressed air power, and control signals on the deck to 2,500 meters underwater through an umbilical cable. The electricity will be transmitted to the deepwater motor, which drives the hydraulic pump for piling construction.

[0005] However, motors used in these technologies exhibit significant drawbacks when used 2,500 meters underwater. Conventional insulation materials struggle to maintain the motor's insulation performance under harsh conditions such as high voltage, elevated temperatures, and humidity, easily leading to faults such as insulation breakdown. Simply increasing the casing thickness or using high-strength materials significantly increases the motor's weight and cost, fails to effectively balance the internal and external pressure differential, and increases motor vibration. Long-term use can lead to seal failure and other issues. Conventional connection structures can easily loosen during motor vibration, affecting motor stability. Universal bearings cannot meet the long life requirements under specific vibration and stress conditions, further impacting motor performance and reliability. Summary of the Invention

[0006] In order to achieve operation in a deep-water environment, the present application provides an oil-filled deep-water motor.

[0007] This application provides an oil-filled deep-water motor, which adopts the following technical solution:

[0008] The oil-filled deep water motor comprises a motor shell, a main shaft, a rotor assembly fixedly connected with the main shaft, and a stator assembly fixedly connected with the motor shell, the motor shell comprises, in sequence, a shaft extension end cover, a shaft extension end snap ring, a shaft extension end fitting ring, a seamless tube casing, a wiring end fitting ring, a wiring end snap ring, a connecting frame, and a wiring end cover, the rotor assembly, close to the shaft extension end, is sequentially provided with a shaft extension end bearing set and a mechanical seal, the rotor assembly, close to the wiring end, is provided with a wiring end bearing, the main shaft, close to the shaft extension end, is rotatably connected with the motor shell through the shaft extension end bearing set, the main shaft, close to the wiring end, is rotatably connected with the motor shell through the wiring end bearing, the connecting frame is provided with a wiring hole for the power supply wire of the stator assembly to pass through, the wiring end cover is provided with a first lead-out hole for the power cable composed of the power supply wire of the stator assembly to pass through, the first lead-out hole is provided with a cable seal, the mechanical seal and the cable seal separate the inside of the motor shell from the outside environment, and the inside of the motor shell is filled with mineral oil.

[0009] By adopting the technical scheme, the motor shell can protect the internal components, and the seamless tube casing and other structures can enhance the mechanical strength; the shaft extension end bearing set and the wiring end bearing support the rotation of the main shaft, ensuring stable operation of the motor; the mechanical seal and the cable seal prevent external seawater from entering, ensure that the inside is filled with mineral oil, achieve waterproofing and insulation, and control the temperature rise within 95 DEG C; and the wiring hole and the first lead-out hole facilitate line connection, meeting the power supply requirements of the motor.

[0010] Optionally, the shaft extension end fitting ring and the wiring end fitting ring are both welded and formed with the seamless tube casing, the shaft extension end cover and the shaft extension end snap ring are detachably connected with the shaft extension end fitting ring, and the wiring end cover, the connecting frame, and the wiring end snap ring are detachably connected with the wiring end fitting ring.

[0011] By adopting the technical scheme, the welding and forming of the shaft extension end fitting ring and the wiring end fitting ring with the seamless tube casing can ensure the structural strength and sealing performance of the motor shell accommodating the stator assembly and the rotor assembly; the detachable connection of the shaft extension end cover and the shaft extension end snap ring with the shaft extension end fitting ring and the detachable connection of the wiring end cover, the connecting frame, and the wiring end snap ring with the wiring end fitting ring facilitate the assembly, disassembly, maintenance, and replacement of parts of the motor. All the components of the motor shell in contact with seawater are made of duplex stainless steel, and all the pressure-bearing parts except the seamless tube casing are made of forged parts, and the welding process between the shaft extension end fitting ring and the wiring end fitting ring and the seamless tube casing is selected as a fusion welding process, so as to ensure the reliability of the motor shell.

[0012] Optionally, a shaft extension end connecting groove is provided on the outer wall of the shaft extension end mating ring, a shaft extension end protective wall is extended from the shaft extension end retaining ring on the side close to the shaft extension end mating ring, a shaft extension end connecting block is provided on the inner side wall of the shaft extension end protective wall which cooperates with the shaft extension end connecting groove, a shaft extension end gasket is provided on the outer wall of the shaft extension end cover, and the shaft extension end gasket is arranged between the shaft extension end mating ring and the shaft extension end retaining ring; the motor housing also includes a first connecting bolt, which passes through the shaft extension end retaining ring and the shaft extension end gasket in sequence and is connected to the shaft extension end mating ring; the motor housing also includes a second connecting bolt, which passes through the shaft extension end gasket and is connected to the shaft extension end mating ring; a first sealing ring is provided between the shaft extension end mating ring and the shaft extension end gasket.

[0013] By adopting the above technical solution, the shaft extension end connecting groove cooperates with the shaft extension end connecting block to enhance the stability of the connection between the shaft extension end retaining ring and the shaft extension end matching ring; the shaft extension end washer can reduce the impact deformation of the bolt on the vibration; the first connecting bolt connects the shaft extension end retaining ring, the shaft extension end washer and the shaft extension end matching ring together to ensure that the three are tightly connected; the second connecting bolt connects the shaft extension end washer and the shaft extension end matching ring together to ensure that the two are tightly connected; the first sealing ring can effectively prevent seawater from entering the interior of the motor from the gap between the shaft extension end matching ring and the shaft extension end protective wall, thereby improving the sealing performance and reliability of the motor.

[0014] Optionally, a terminal connection groove is provided on the outer wall of the terminal mating ring, and a terminal protection wall extends from the terminal clamping ring on one side close to the terminal mating ring, and a terminal connection block is provided on the inner side wall of the terminal protection wall that cooperates with the terminal connection groove, a first terminal gasket is provided on the outer wall of the connecting frame, and a second terminal gasket is provided on the outer wall of the terminal end cover, the first terminal gasket and the second terminal gasket are sequentially arranged between the terminal mating ring and the terminal clamping ring shaft extension end gasket; the motor housing also includes a third connecting bolt, the third connecting bolt passes through the first terminal gasket and is connected to the terminal mating ring; the motor housing also includes a fourth connecting bolt, the fourth connecting bolt passes through the terminal clamping ring, the second terminal gasket and the first terminal gasket in sequence and is connected to the shaft extension end mating ring; a second sealing ring is provided between the terminal mating ring and the first terminal gasket, and a third sealing ring is provided between the second terminal gasket and the terminal end cover.

[0015] By adopting the technical scheme, the terminal connecting groove is matched with the terminal connecting block, the stability of the terminal snap ring and the terminal cooperating ring in connection is enhanced, the terminal first gasket and the terminal second gasket can reduce the impact deformation of the bolt caused by vibration, the third connecting bolt connects the terminal first gasket and the terminal cooperating ring together, and the connection of the two is ensured to be tight, the fourth connecting bolt connects the terminal snap ring, the terminal second gasket, the terminal first gasket and the terminal cooperating ring together, and the connection of the four is ensured to be tight, and the second sealing ring and the third sealing ring can effectively prevent seawater from entering the motor from the gap between the terminal cooperating ring and the terminal protection wall, and improve the sealing performance and reliability of the motor.

[0016] Optionally, a pressure balance system is further included, and the pressure balance system includes a pressure compensation device, and an interface flange connected with the pressure compensation device and an air passage are arranged at the terminal end cover.

[0017] By adopting the technical scheme, the pressure balance system includes the pressure compensation device, the pressure compensation device can balance the pressure difference between the inside and outside of the motor, and keep the inside of the motor in a slightly positive pressure compared with the deep seawater pressure outside, so that the sealing pressure of the motor shell and the sealing is reduced, the reliable work of the motor in the high-pressure deep water environment is ensured, the seawater intrusion caused by the unbalanced internal and external pressure is avoided, and the stability and service life of the motor are improved.

[0018] Optionally, the shaft extension end bearing set includes a back-to-back combination of tapered roller bearings, the terminal end bearing includes a cylindrical roller bearing, the shaft extension end bearing set and the terminal end bearing are positioned through a bearing locking mechanism, and the bearing locking mechanism includes a locking assembly with a round nut and a stop washer.

[0019] By adopting the technical scheme, the shaft extension end bearing set selects a back-to-back combination of tapered roller bearings SKF T7FC 075 (the basic rated dynamic load of a single bearing is 232KN), can bear bidirectional thrust, the terminal end bearing selects a cylindrical roller bearing NU2312, ensures that the bearing life is not less than 50000 hours when the motor vibrates at an acceleration of 6g (in the up-down direction), and the motor can work reliably and for a long time under the working condition.

[0020] Optionally, the stator winding of the stator assembly adopts multilayer polyimide film wrapping insulation, the stator winding is filled with H-grade insulation paint between the copper wire of the stator winding and the polyimide film through a vacuum impregnation process, and the H-grade insulation paint is coated outside the stator winding.

[0021] By adopting the above technical solution, the polyimide film wrapped copper round wire has an insulation heat resistance grade of H, which has good insulation and mechanical strength. Combined with H-grade insulating varnish, it can achieve high temperature resistance of 180°C, high insulation strength, and a pressure resistance of 40MPa, so that when the internal pressure of the motor reaches the equivalent of 2500m underwater through the pressure compensation device, it can still maintain normal operation.

[0022] Optionally, a plurality of oil injection channels are provided at one end of the shaft extension end cover close to the mechanical seal, the oil injection channels are arranged radially along the motor housing, and a sealing plug is provided at one end of the oil injection channel away from the interior of the motor housing.

[0023] By adopting the above technical solution, mineral oil can make the internal joints of deep-water motors have good insulation properties. However, during operation, mineral oil has greater wear loss than coolant and needs to be replenished periodically. The oil injection channel can be used to easily inject mineral oil into the motor, and the sealing plug can prevent internal oil leakage and external impurities from entering, thereby ensuring the normal operation of the motor.

[0024] Optionally, a plurality of compensator installation channels are provided at the motor housing, and the compensator installation channels are arranged along the radial direction of the motor housing.

[0025] By adopting the above technical solution, multiple compensator installation channels distributed radially along the motor housing are provided on the end cover of the shaft extension, which facilitates the installation of the compensator, thereby better adapting to the pressure changes of the motor underwater and improving the reliability and stability of the motor in deep water environment.

[0026] Optionally, an alarm detection system is also included, which includes a temperature sensor, a leakage electrode and a remote terminal. The temperature sensor is arranged at the stator winding end of the stator assembly, the end cover of the axial extension end and the end cover of the wiring terminal. The leakage electrode is arranged in the end cover of the axial extension end. The temperature sensor and the leakage electrode are connected to the remote terminal signal through a signal cable. The end cover of the wiring terminal is provided with a second lead-out hole for the signal cable to pass through, and the second lead-out hole is provided with a cable seal.

[0027] By adopting the above technical solution, temperature sensors are set in the stator winding ends, shaft end end covers and terminal end covers of the stator assembly of the oil-filled deep-water motor, which can monitor the temperature changes of the motor in real time, so as to facilitate timely detection of motor overheating problems; a leakage electrode is set in the shaft end end cover to detect whether seawater intrusion into the motor; the temperature sensor and the leakage electrode are connected to the remote terminal signal through a signal cable, which can realize remote real-time monitoring of the motor operation status; a second lead-out hole with a cable seal for the signal cable to pass through is provided at the terminal end cover, which can ensure the passage of the signal cable while preventing external water and other substances from entering the interior of the motor, thereby improving the safety and reliability of the motor operation.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. Customized polyimide film wrapped copper round wire and H-class insulating varnish are used, and vacuum impregnation process is used to ensure that the motor insulation system has good insulation and mechanical strength under harsh conditions such as high voltage, high temperature, and humidity, avoiding faults such as insulation breakdown;

[0030] 2. Equipped with a pressure compensation system to balance the internal and external pressure differences, reduce the pressure on the shell and sealing surface. In addition, the seamless pipes for the casing, forgings for the pressure-bearing parts and the full penetration welding process enable the motor to work reliably in the high-pressure environment underwater;

[0031] 3. Reduce the rotor volume, select appropriate bearings and anti-loosening measures, enhance the vibration resistance of the motor, and avoid problems such as mechanical wear, corona corrosion and insulation aging caused by vibration;

[0032] 4. All parts of the motor that come into contact with seawater are made of duplex stainless steel, and the bearings are reasonably selected and combined to ensure that the motor is resistant to seawater corrosion. The bearing life is not less than 50,000 hours, ensuring long-term and reliable operation of the motor.

[0033] 5. Set up temperature and leakage detection sensors to realize real-time monitoring and control of motor operation status, and improve the safety and reliability of motor operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the internal structure of the oil-filled deep-water motor provided in an embodiment of the present application.

[0035] Explanation of the reference numerals: 1-main shaft; 2-rotor assembly; 3-stator assembly; 301-power supply line; 302-power cable; 303-cable seal; 4-shaft end cover; 401-shaft end gasket; 5-shaft end clamping ring; 501-shaft end protective wall; 502-shaft end connecting block; 6-shaft end mating ring; 601-shaft end connecting groove; 7-seamless pipe housing; 8-terminal mating ring; 801-terminal connecting groove; 9-terminal clamping ring; 901-terminal protective wall; 902-terminal Connecting block; 10-connecting frame; 1001-wiring harness; 1002-first washer of terminal; 11-terminal cover; 1101-second washer of terminal; 12-first connecting bolt; 13-second connecting bolt; 14-third connecting bolt; 15-fourth connecting bolt; 16-first sealing ring; 17-second sealing ring; 18-third sealing ring; 19-oil filling channel; 20-compensator installation channel; 21-leakage electrode; 22-shaft extension end bearing group; 23-terminal bearing; 24-locking assembly. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1 This application is described in further detail.

[0037] The embodiment of the present application discloses an oil-filled deep-water motor.

[0038] like Figure 1 As shown, the oil-filled deep-water motor includes a motor housing, a main shaft 1, a rotor assembly 2 fixedly connected to the main shaft 1, and a stator assembly 3 fixedly connected to the motor housing. The motor housing includes a shaft end cover 4, a shaft end retaining ring 5, a shaft end matching ring 6, a seamless pipe housing 7, a terminal matching ring 8, a terminal retaining ring 9, a connecting frame 10 and a terminal end cover 11, and the rotor assembly 2 is provided with a shaft end bearing group 22 and a mechanical seal on the side close to the shaft end. The rotor assembly 2 is provided with a terminal bearing 23 on the side close to the terminal end. The main shaft 1 is provided with a shaft end bearing group 22 and a mechanical seal on the side close to the shaft end. One end of the end is rotatably connected to the motor housing through the shaft extension end bearing group 22, and the end of the main shaft 1 close to the terminal is rotatably connected to the motor housing through the terminal bearing 23. A wiring hole for the power supply line 301 of the stator assembly 3 is provided at the connecting frame 10, and a first lead-out hole for the power cable 302 composed of the power supply line 301 of the stator assembly 3 to pass through is provided at the terminal end cover 11. A cable seal 303 is provided at the first lead-out hole. The mechanical seal and the cable seal 303 separate the inside of the motor housing from the external environment. The inside of the motor housing is filled with mineral oil.

[0039] The motor's outer casing is designed to provide necessary protection for internal components, while also enhancing overall mechanical strength through the use of a seamless tube casing 7. The shaft extension bearing assembly 22 and the terminal bearing 23 work together to support the rotation of the main shaft 1 and ensure stable motor operation. The dual protection of a mechanical seal and cable seal 303 effectively prevents the intrusion of external seawater while ensuring that the interior is filled with mineral oil, thereby achieving waterproofing and insulation of the motor and controlling the temperature rise to within 95°C. Furthermore, the design of the wiring holes and the first lead-out hole facilitates wiring connection to meet the motor's power supply requirements.

[0040] like Figure 1 As shown, the shaft extension end mating ring 6 and the terminal end mating ring 8 are both welded to the seamless pipe housing 7, the shaft extension end cover 4 and the shaft extension end clamping ring 5 are detachably connected to the shaft extension end mating ring 6, and the terminal end cover 11, the connecting frame 10 and the terminal clamping ring 9 are detachably connected to the terminal end mating ring 8.

[0041] The shaft extension mating ring 6, the terminal mating ring 8, and the seamless tube housing 7 are welded together using full-penetration welding technology, ensuring the structural strength and sealing of the motor housing when accommodating the stator assembly 3 and rotor assembly 2. The shaft extension end cap 4 and the shaft extension clamping ring 5, the terminal end cap 11, and the connecting bracket 10 and the terminal clamping ring 9, respectively, are detachably connected to the shaft extension mating ring 6 and the terminal mating ring 8, facilitating assembly, disassembly, maintenance, and component replacement of the motor. All components of the motor housing that come into contact with seawater are made of duplex stainless steel. With the exception of the seamless tube housing 7, all other pressure-bearing parts are forged to ensure reliable strength.

[0042] In order to fix the power supply line 301 passing through the connecting frame 10, a wiring harness 1001 is further provided on the side of the connecting frame 10 away from the shaft extension end. The wiring harness 1001 is fixedly connected to the connecting frame 10. The wiring harness 1001 is used to limit and fix the power supply line 301 to reduce the wear and tear on the power supply line 301 caused by vibration.

[0043] like Figure 1As shown, a shaft extension end connecting groove 601 is provided on the outer wall of the shaft extension end matching ring 6, a shaft extension end protective wall 501 is extended from the side of the shaft extension end retaining ring 5 close to the shaft extension end matching ring 6, and a shaft extension end connecting block 502 matching the shaft extension end connecting groove 601 is provided on the inner side wall of the shaft extension end protective wall 501, and a shaft extension end gasket 401 is provided on the outer wall of the shaft extension end cover 4, and the shaft extension end gasket 401 is arranged between the shaft extension end matching ring 6 and the shaft extension end retaining ring 5; the motor housing also includes a first connecting bolt 12, which passes through the shaft extension end retaining ring 5 and the shaft extension end gasket 401 in sequence and is connected to the shaft extension end matching ring 6; the motor housing also includes a second connecting bolt 13, which passes through the shaft extension end gasket 401 and is connected to the shaft extension matching ring 6; a first sealing ring 16 is provided between the shaft extension matching ring 6 and the shaft extension end gasket 401.

[0044] The shaft end connecting groove 601 cooperates with the shaft end connecting block 502 to enhance the stability of the connection between the shaft end retaining ring 5 and the shaft end matching ring 6; the shaft end washer 401 can reduce the impact deformation of the bolts caused by vibration; the first connecting bolt 12 connects the shaft end retaining ring 5, the shaft end washer 401 and the shaft end matching ring 6 together to ensure that the three are tightly connected; the second connecting bolt 13 connects the shaft end washer 401 and the shaft end matching ring 6 together to ensure that the two are tightly connected; the first sealing ring 16 can effectively prevent seawater from entering the interior of the motor from the gap between the shaft end matching ring 6 and the shaft end protective wall 501, thereby improving the sealing performance and reliability of the motor.

[0045] like Figure 1 As shown, a terminal connection groove 801 is provided on the outer wall of the terminal mating ring 8, a terminal protection wall 901 is extended from the side of the terminal clamping ring 9 close to the terminal mating ring 8, and a terminal connection block 902 that matches the terminal connection groove 801 is provided on the inner side wall of the terminal protection wall 901. A first terminal gasket 1002 is provided on the outer wall of the connecting frame 10, and a second terminal gasket 1101 is provided on the outer wall of the terminal cover 11. The first terminal gasket 1002 and the second terminal gasket 1101 are sequentially provided on the terminal mating ring 8 and the terminal clamping ring 9. The motor housing further comprises a third connecting bolt 14, which passes through the first washer 1002 of the terminal and is connected to the mating ring 8 of the terminal; the motor housing further comprises a fourth connecting bolt 15, which passes through the clamping ring 9 of the terminal, the second washer 1101 of the terminal and the first washer 1002 of the terminal in sequence and is connected to the mating ring 6 of the shaft extension end; a second sealing ring 17 is provided between the mating ring 8 of the terminal and the first washer 1002 of the terminal, and a third sealing ring 18 is provided between the second washer 1101 of the terminal and the terminal cover 11.

[0046] The terminal connection groove 801 cooperates with the terminal connection block 902 to enhance the stability of the connection between the terminal clamping ring 9 and the terminal mating ring 8; the first terminal washer 1002 and the second terminal washer 1101 can reduce the impact deformation of the bolts caused by vibration; the third connecting bolt 14 connects the first terminal washer 1002 and the terminal mating ring 8 together to ensure that the two are tightly connected; the fourth connecting bolt 15 connects the terminal clamping ring 9, the second terminal washer 1101, the first terminal washer 1002 and the terminal mating ring 8 together to ensure that the four are tightly connected; the second sealing ring 17 and the third sealing ring 18 can effectively prevent seawater from entering the interior of the motor from the gap between the terminal mating ring 8 and the terminal protective wall 901, thereby improving the sealing performance and reliability of the motor.

[0047] In order to further increase the anti-loosening reliability, the anti-loosening washers of the first connecting bolt 12 and the fourth connecting bolt 15 are locking anti-loosening washers.

[0048] In order to reduce the sealing burden, the oil-filled deep-water motor also includes a pressure balancing system, which includes a pressure compensation device. The terminal cover 11 is provided with an interface flange and a ventilation channel connected to the pressure compensation device.

[0049] The pressure compensation device is another patent applied for by the applicant with application number 2024119757750. Its structure will not be described in detail here. The pressure compensation device can balance the pressure difference between the inside and outside of the motor, and maintain a slightly positive pressure inside the motor compared to the external deep-sea water pressure, thereby reducing the pressure on the motor casing and seal, ensuring that the motor can operate reliably in a high-pressure deep-water environment, avoiding seawater intrusion caused by imbalance between internal and external pressures, and improving the stability and service life of the motor.

[0050] like Figure 1 As shown, the shaft extension end bearing group 22 includes a back-to-back combination of tapered roller bearings, and the terminal end bearing 23 includes a cylindrical roller bearing. The shaft extension end bearing group 22 and the terminal end bearing 23 are positioned by a bearing locking mechanism, and the bearing locking mechanism includes a locking assembly 24 having a round nut and a stop washer.

[0051] In this embodiment, the shaft extension bearing assembly 22 utilizes a back-to-back arrangement of SKF T7FC 075 tapered roller bearings (each bearing has a basic dynamic load rating of 232 kN), capable of withstanding bidirectional thrust. The terminal bearing 23 utilizes NU2312 cylindrical roller bearings, ensuring a bearing life of at least 50,000 hours when the motor vibrates at 6g acceleration (up and down). This bearing combination ensures reliable, long-term operation under the motor's operating conditions.

[0052] In order to ensure that the stator assembly 3 can still maintain normal operation when the internal pressure of the motor reaches the pressure equivalent to 2500m underwater through the pressure compensation device, the stator winding of the stator assembly 3 is insulated with multi-layer polyimide film wrapping. The stator winding is filled with H-class insulating varnish between the copper wire and the polyimide film of the stator winding through a vacuum dipping process, and the H-class insulating varnish is also covered on the outside of the stator winding.

[0053] Polyimide film wrapped copper round wire has an insulation heat resistance grade of H, and has good insulation and mechanical strength. When used with H-grade insulating varnish, it can achieve high temperature resistance of 180°C, high insulation strength, and a pressure resistance of 40MPa.

[0054] like Figure 1 As shown, the end cover 4 of the shaft end close to the mechanical seal is provided with multiple oil injection channels 19, the oil injection channels 19 are arranged along the radial direction of the motor housing, and the end of the oil injection channel 19 away from the inside of the motor housing is provided with a sealing plug.

[0055] Mineral oil cooling provides excellent insulation properties for the internal joints of deepwater motors while providing cooling. However, compared to traditional liquid cooling, mineral oil suffers from greater wear and tear during operation and therefore requires regular replenishment. Oil injection channel 19 allows for convenient injection of mineral oil into the motor. The sealing plug also prevents leakage of the internal oil and intrusion of seawater, thereby ensuring proper operation of the motor.

[0056] like Figure 1 As shown, a plurality of compensator installation channels 20 are provided at the motor housing, and the compensator installation channels 20 are arranged along the radial direction of the motor housing.

[0057] The provision of the compensator installation channel 20 facilitates the installation of the compensator, helps to better adapt to the pressure changes of the motor underwater, and thus improves the reliability and stability of the motor in a deep-water environment.

[0058] In order to grasp the operating status of the motor, the oil-filled deep-water motor also includes an alarm detection system, which includes a temperature sensor (not shown in the figure), a leakage electrode 21 and a remote terminal. The temperature sensor is arranged at the stator winding end, the shaft end end cover 4 and the terminal end cover 11 of the stator assembly 3. The leakage electrode 21 is arranged in the shaft end end cover 4. The temperature sensor and the leakage electrode 21 are connected to the remote terminal signal through a signal cable. A second lead-out hole for the signal cable to pass through is provided at the terminal end cover 11, and a cable seal 303 is provided at the second lead-out hole.

[0059] Temperature sensors are arranged in the stator winding ends, shaft end cover 4 and terminal cover 11 of the stator assembly 3 of the oil-filled deep-water motor, which can monitor the temperature changes of the motor in real time and facilitate timely detection of motor overheating problems; a leakage electrode 21 is arranged in the shaft end cover 4 to detect whether seawater has intruded into the motor; the temperature sensor and the leakage electrode 21 are connected to the remote terminal signal through a signal cable, which can realize remote real-time monitoring of the motor operation status; a second lead-out hole with a cable seal 303 for the signal cable to pass through is provided at the terminal cover 11, which can ensure the passage of the signal cable while preventing external water and other substances from entering the interior of the motor, thereby improving the safety and reliability of the motor operation.

[0060] The implementation principle of an oil-filled deep-water motor in the embodiment of the present application is as follows:

[0061] The motor housing is filled with mineral oil, which is completely isolated from the external environment by mechanical seals and cable seals 303, effectively preventing the intrusion of seawater. During operation, the main shaft 1 rotates within the motor housing via the shaft extension bearing assembly 22 and the terminal bearing 23, supporting the rotation of the main shaft 1 and ensuring the stability of the motor's operation. Furthermore, the mineral oil inside the motor not only provides cooling but also imparts excellent insulation properties to the motor's internal connectors. When the motor's internal pressure reaches a pressure equivalent to 2500 meters underwater, thanks to the multi-layer polyimide film insulation and vacuum impregnation process used in the stator windings, the stator assembly 3 maintains normal operation. Furthermore, to monitor the motor's operating status in real time, the oil-filled deepwater motor is equipped with an alarm detection system, including a temperature sensor, a leakage electrode 21, and a remote terminal. This system monitors motor temperature changes and the presence of seawater intrusion in real time, transmitting data to the remote terminal via a signal cable, enabling remote, real-time monitoring of the motor's operating status.

[0062] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An oil-filled deep-water motor having a shaft extension end for outputting power and a terminal for connecting a circuit, characterized in that: include: A motor housing, a main shaft (1), a rotor assembly (2) fixedly connected to the main shaft (1), and a stator assembly (3) fixedly connected to the motor housing, The motor housing comprises an end cover (4) at the shaft extension end, a clamping ring (5) at the shaft extension end, a matching ring (6) at the shaft extension end, a seamless pipe housing (7), a matching ring (8) at the terminal end, a clamping ring (9) at the terminal end, a connecting frame (10) and an end cover (11) at the terminal end, which are arranged in sequence. The rotor assembly (2) is provided with a shaft extension end bearing group (22) and a mechanical seal in sequence on one side close to the shaft extension end. A terminal bearing (23) is provided on one side of the rotor assembly (2) close to the terminal. One end of the main shaft (1) close to the shaft extension end is rotatably connected to the motor housing through the shaft extension end bearing group (22). One end of the main shaft (1) close to the terminal is rotatably connected to the motor housing via the terminal bearing (23). The connecting frame (10) is provided with a wiring hole for the power supply line (301) of the stator assembly (3) to pass through, and the terminal cover (11) is provided with a first lead-out hole for the power cable (302) formed by the power supply line (301) of the stator assembly (3) to pass through, and the first lead-out hole is provided with a cable seal (303). The mechanical seal and the cable seal (303) separate the interior of the motor housing from the external environment. The interior of the motor housing is filled with mineral oil. The shaft extension end matching ring (6) and the terminal end matching ring (8) are both welded to the seamless pipe housing (7). The shaft extension end cover (4) and the shaft extension end snap ring (5) are detachably connected to the shaft extension end matching ring (6). The terminal end cover (11), the connecting frame (10), the terminal clamping ring (9) and the terminal matching ring (8) are detachably connected. An outer wall of the shaft extension end matching ring (6) is provided with a shaft extension end connecting groove (601); a shaft extension end protective wall (501) is extended from a side of the shaft extension end retaining ring (5) close to the shaft extension end matching ring (6); an inner side wall of the shaft extension end protective wall (501) is provided with a shaft extension end connecting block (502) matching with the shaft extension end connecting groove (601); an outer wall of the shaft extension end cover (4) is provided with a shaft extension end washer (401); and the shaft extension end washer (401) is provided between the shaft extension end matching ring (6) and the shaft extension end retaining ring (5); The motor housing further comprises a first connecting bolt (12), the first connecting bolt (12) sequentially passing through the shaft extension end clamping ring (5) and the shaft extension end washer (401) and connected to the shaft extension end matching ring (6); The motor housing further comprises a second connecting bolt (13), the second connecting bolt (13) passing through the shaft extension end washer (401) and connected to the shaft extension end matching ring (6); A first sealing ring (16) is provided between the shaft extension end matching ring (6) and the shaft extension end washer (401). The outer wall of the terminal matching ring (8) is provided with a terminal connection groove (801), the terminal clamping ring (9) extends from a side close to the terminal matching ring (8) to form a terminal protection wall (901), and the inner side wall of the terminal protection wall (901) is provided with a terminal connection block (902) that matches the terminal connection groove (801). A first terminal washer (1002) is provided on the outer wall of the connecting frame (10), and a second terminal washer (1101) is provided on the outer wall of the terminal cover (11). The first terminal washer (1002) and the second terminal washer (1101) are sequentially arranged between the terminal matching ring (8) and the axial extension end snap ring (5) of the terminal snap ring (9); The motor housing further comprises a third connecting bolt (14), the third connecting bolt (14) passing through the first washer (1002) of the terminal and connected to the matching ring (8) of the terminal; The motor housing further comprises a fourth connecting bolt (15), the fourth connecting bolt (15) sequentially passing through the terminal clamp ring (9), the terminal second washer (1101) and the terminal first washer (1002) and connected to the shaft extension end matching ring (6); A second sealing ring (17) is provided between the terminal matching ring (8) and the terminal first gasket (1002), and a third sealing ring (18) is provided between the terminal second gasket (1101) and the terminal end cover (11).

2. The oil-filled deep-water motor according to claim 1, characterized in that: It also includes a pressure balancing system, which includes a pressure compensation device. The terminal cover (11) is provided with an interface flange and a vent channel connected to the pressure compensation device.

3. The oil-filled deep-water motor according to claim 1, characterized in that: The shaft extension end bearing group (22) includes a back-to-back combination of tapered roller bearings, and the terminal end bearing (23) includes a cylindrical roller bearing. The shaft extension end bearing group (22) and the terminal end bearing (23) are positioned by a bearing locking mechanism, and the bearing locking mechanism includes a locking assembly (24) having a round nut and a stop washer.

4. The oil-filled deep-water motor according to claim 1, characterized in that: The stator winding of the stator assembly (3) is insulated by wrapping multiple layers of polyimide film. The stator winding is filled with H-class insulating varnish between the copper wire of the stator winding and the polyimide film through a vacuum varnishing process, and the H-class insulating varnish is simultaneously coated on the outside of the stator winding.

5. The oil-filled deep-water motor according to claim 2, characterized in that: The shaft end cover (4) is provided with a plurality of oil injection channels (19) at one end close to the mechanical seal. The oil injection channels (19) are arranged along the radial direction of the motor housing. A sealing plug is provided at one end of the oil injection channel (19) away from the interior of the motor housing.

6. The oil-filled deep-water motor according to claim 2, characterized in that: A plurality of compensator installation channels (20) are provided at the motor housing, and the compensator installation channels (20) are arranged along the radial direction of the motor housing.

7. The oil-filled deep-water motor according to claim 5 or 6, characterized in that: The invention also includes an alarm detection system, which includes a temperature sensor, a leakage electrode (21) and a remote terminal. The temperature sensor is arranged at the stator winding end of the stator assembly (3), the shaft end cover (4) and the terminal end cover (11). The leakage electrode (21) is arranged in the shaft end cover (4). The temperature sensor and the leakage electrode (21) are connected to the remote terminal signal through a signal cable. The terminal end cover (11) is provided with a second lead-out hole for the signal cable to pass through. The second lead-out hole is provided with a cable seal (303).

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