An underwater permanent magnet motor and a processing method thereof

Abstract

The present invention provides an underwater permanent magnet motor and a processing method thereof, including a housing assembly, which includes a main pipe body, a front pipe body, a front end plate and a rear assembly ring, the front end of the main pipe body is connected to the front pipe body, the rear end is connected to the rear assembly ring, the front end of the front pipe body is connected to the front end plate, and the outer diameter of the main pipe body is not less than the outer diameter of the front end plate; an internal drive assembly, which includes a stator, a rotor and a rotating shaft, the stator is installed in the main pipe body, the rotor is installed inside the main pipe body, the output end of the rotor is connected to the rotating shaft, the rotor extends into the front pipe body, and the rotating shaft extends out of the front end plate; a composite cable, which extends into the housing assembly and is electrically connected to the internal drive assembly; a front assembly cover, which is connected to the front end of the front end plate; and a rear assembly assembly. The present invention designs a multi-stage sealing structure at the connection between the rear assembly cover and the main pipe body, which can effectively avoid water seepage and ensure the working stability of the underwater motor. The internal cooling circulation channel is also designed to quickly extract the working heat in the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater motors, and in particular to an underwater permanent magnet motor and a processing method thereof. Background Art

[0002] The underwater permanent magnet motor is a motor designed for underwater environments. It uses permanent magnets as its magnetic field source instead of traditional electromagnets. This design gives it the advantages of high efficiency, high power density, small size, light weight, good operating stability and reliability, making it very suitable for working underwater or in harsh environments. Underwater permanent magnet motors are mainly used in marine engineering, underwater robots, submarine propulsion systems, deep-sea exploration equipment and other fields;

[0003] The underwater permanent magnet motor mainly includes an inner drive rotor, a stator, a housing, a front cover and a rear cover. Since the wiring terminals and control components of the underwater permanent magnet motor are mostly concentrated at the rear cover, the heat dissipation and sealing requirements here are also the highest; the current underwater motor has the following shortcomings at the rear cover:

[0004] 1. The rear cover is connected to the housing by screws. Multiple sealing rings are set between the rear cover and the housing, but the sealing level is still insufficient. The sealing performance of the sealing ring will decrease with long-term use. The maintenance cycle of the underwater motor is short, and the sealing ring needs to be replaced regularly to ensure the sealing performance;

[0005] 2. As the underwater motor is submerged in water, it can directly exchange heat with the help of water. However, the waterproof sealing structure reduces the heat transfer effect from the inside of the shell to the outside, resulting in high heat in the rear end cover of the motor and the risk of burning out the electrical components. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides an underwater permanent magnet motor, which solves the problems mentioned in the background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] An underwater permanent magnet motor, a housing assembly, comprising a main pipe body, a front pipe body, a front end plate and a rear assembly ring, the front end of the main pipe body is connected to the front pipe body, the rear end is connected to the rear assembly ring, the front end of the front pipe body is connected to the front end plate, and the outer diameter of the main pipe body is not less than the outer diameter of the front end plate;

[0009] The inner driving assembly includes a stator, a rotor and a rotating shaft. The stator is installed in the main pipe body. The rotor is installed inside the main pipe body. The output end of the rotor is connected to the rotating shaft. The rotor extends into the front pipe body, and the rotating shaft extends out of the front end plate.

[0010] a composite cable extending into the housing assembly and electrically connected to the inner drive assembly;

[0011] A front assembly cover, which is butted against the front end of the front end plate;

[0012] A rear assembly component, comprising a rear assembly cover, a pressure gauge, an outer ring cover, and an inner cooling cover. The rear assembly cover is assembled at the rear end of the rear assembly ring. The outer wall of the rear assembly cover is provided with an outer ring cover, which is sleeved on the side wall of the rear assembly ring. A sealing ring cavity is provided inside the outer ring cover, and liquid guide joints are symmetrically installed inside the sealing ring cavity. The interior of the outer ring cover is a closed high-pressure cavity, and a pressure gauge for detecting the air pressure of the high-pressure cavity is installed on the outer wall of the outer ring cover. The interior of the outer ring cover is provided with an inner cooling cover, which is used to reduce the internal working temperature of the housing component.

[0013] The outer water-conducting pipe is arranged at intervals on the outside of the main pipe body, the front end of the outer water-conducting pipe is connected to the front assembly cover, the rear end is connected to the outer ring cover, the outer water-conducting pipe is connected to the liquid-conducting joint, and the outer wall of the outer water-conducting pipe is provided with an outer fin;

[0014] The composite material guide assembly is horizontally placed inside the rear assembly cover, the composite material guide assembly penetrates the main pipe body, and the end of the composite material guide assembly is inserted into the sealing ring cavity; the composite material guide assembly has an independent filling cavity and a liquid guide cavity, the water guide outer pipe, the liquid guide cavity and the inner cooling cover are sequentially connected, and the filling cavity is used to fill the sealing ring cavity with epoxy resin; when the air pressure of the high-pressure cavity reaches the standard, the composite material guide assembly fully seals the connection between it and the main pipe body;

[0015] The sealing component is vertically placed in the middle of the rear assembly cover. When the air pressure of the high-pressure chamber reaches the standard, the sealing component seals the connection between the composite cable and the rear assembly cover in multiple stages.

[0016] Furthermore, the composite cable includes an outer sheath, an inner sheath is provided inside the outer sheath, a signal cable, an air guide tube and a resin filling tube are integrated inside the inner sheath, a conductive connector is provided at the end of the signal cable, the conductive connector is electrically connected to the internal drive assembly, the air guide tube is used to exhaust air into the high-pressure chamber, and the resin filling tube is connected to the composite material guide assembly.

[0017] Furthermore, the rear assembly cover includes an electrical box and a rear end plate. The front end outer wall of the electrical box is provided with a rear end plate, and the rear end plate is connected to the rear assembly ring through a second locking screw. A stepped hole is opened in the middle of the rear end surface of the electrical box, the outer sheath stops at the rear end surface of the electrical box, and the inner sheath passes through the stepped hole.

[0018] Furthermore, the sealing assembly includes a partition, a pressing tube, a rubber ring and a resistance block. The partition is vertically slidably placed inside the electrical box. A pressing tube is provided in the middle of the bottom surface of the partition. The rubber ring is sleeved on the outer wall of the inner sheath. The rubber ring is embedded in the inner top of the stepped hole. The bottom end of the pressing tube is attached to the surface of the rubber ring. The pressing tube is used to press the rubber ring downward to deform the rubber ring to increase the sealing performance. The inner sheath extends into the pressing tube, and the signal cable, air duct and resin filling tube are all sealed and pass through the partition.

[0019] Furthermore, the composite material guide assembly includes a sealing plug plate, a liquid dispensing tube, and a circulation hose. A first through groove is symmetrically opened inside the rear assembly ring, a positioning ring is provided in the middle of the surface of the rear end plate, and a second through groove is symmetrically opened on the inner wall of the positioning ring. The first through groove and the second through groove are arranged opposite to each other. The sealing plug plate passes through the first through groove and the second through groove. The outer end of the sealing plug plate extends into the sealing ring cavity, and the inner end extends into the positioning ring. Two groups of sealing plug plates are symmetrically arranged. A filling cavity and a liquid guide cavity are symmetrically opened inside the sealing plug plate. The inner end of the filling cavity is connected to the liquid dispensing tube, and the liquid dispensing tube is connected to the resin filling tube. A resistance block is provided on the top surface of the partition, and the resistance block is in contact with the inclined surface of the inner end of the sealing plug plate.

[0020] Furthermore, an avoidance groove, a filling hole and a water guide hole are provided at the outer end of the sealing plug plate. The filling hole and the water guide hole are symmetrically arranged on both sides of the avoidance groove. The filling hole is connected with the filling cavity, and the water guide hole is connected with the liquid guide cavity. A rubber cover is provided on the outer wall of the outer end of the sealing plug plate. The side section of the rubber cover is a structure of narrow outside and wide inside. The liquid guide cavity is connected with the inner cooling cover through a circulation hose, and a circulation pump is built into the circulation hose.

[0021] Furthermore, the top surface of the inner cooling cover is fitted with the stator, and a center hole for the conductive connector to pass through is opened at the center of the top surface of the inner cooling cover. The bottom surface of the inner cooling cover is provided with multiple groups of support plates and two groups of water guide plates. The water guide plates are symmetrically arranged, and the sealing plug plates are fitted and pass through the bottom of the water guide plates. The circulating hose is connected to the water guide plates, and the support plates are vertically arranged on the surface of the rear end plate.

[0022] Furthermore, a cooling cavity is provided inside the front assembly cover, a circulation joint is symmetrically provided on the bottom surface of the front assembly cover, and the top end of the water-conducting outer pipe is plugged into the circulation joint.

[0023] Furthermore, a plurality of groups of reinforcing rods are provided between the front assembly cover and the outer ring cover, and the plurality of groups of reinforcing rods are distributed in a ring array, and the reinforcing rods are used to enclose and protect the outer shell assembly.

[0024] A method for processing an underwater permanent magnet motor, the method comprising the following steps:

[0025] S1. Insert the inner drive assembly into the outer shell assembly;

[0026] S2, put the rear assembly component on the rear end of the main body, and screw the second locking screw into the rear assembly ring;

[0027] S3, pre-inserting the water guide outer pipe and the reinforcing rod on the surface of the outer ring cover;

[0028] S4. Insert the front assembly cover on the outer wall of the front end plate, plug the water guide outer pipe and the reinforcing rod into the front assembly cover, and the cooling cavity, the water guide outer pipe, the liquid guide joint, the liquid guide cavity and the inner cooling cover form a circulating cooling channel; screw on the first locking screw to fix the front assembly cover on the front end plate;

[0029] S5. High-pressure gas is discharged into the high-pressure chamber through the air guide pipe. The high-pressure gas drives the partition plate to move downward, so that the pressure tube presses down the rubber ring. At the same time, the abutment block abuts the sealing plug plate to move outward, so that the rubber cover fits tightly with the first through groove.

[0030] S6. Resin liquid is added to the filling cavity through the resin filling tube. The resin liquid is filled into the sealing ring cavity and simultaneously seals the connection points at both ends of the liquid guide joint and the connection point between the first locking screw and the rear end plate.

[0031] The present invention provides an underwater permanent magnet motor. Compared with the prior art, it has the following beneficial effects:

[0032] 1. The following multi-stage sealing structure is designed at the connection between the rear assembly cover and the main pipe:

[0033] 1.1. The outer ring cover fits the side wall of the main pipe to form a primary sealing structure;

[0034] 1.2. A sealing ring cavity is provided inside the outer ring cover, and the sealing ring cavity can be filled with epoxy resin to form a secondary sealing structure. The epoxy resin can seal the joint between the outer ring cover and the main body, the joint between the main body and the rear assembly cover, and the connection of the liquid guide joint to prevent water leakage of the liquid guide joint;

[0035] 1.3. The contact surface between the main body and the sealing ring cover forms a three-level sealing structure;

[0036] 2. The following multi-level sealing structure is designed at the connection between the rear assembly cover and the composite cable:

[0037] 2.1. The outer sheath of the composite cable contacts the bottom surface of the rear assembly cover to form a primary sealing structure;

[0038] 2.2. The contact part between the inner sheath of the composite cable and the stepped hole forms a secondary sealing structure;

[0039] 2.3. The contact part between the rubber ring of the sealing assembly and the stepped hole forms a three-level sealing structure;

[0040] 2.4. The partition of the sealing component can form a four-level sealing structure from the inside. If the first three-level sealing structure is damaged and water enters, the partition can prevent water from entering the drive component again, avoiding damage to the drive component. It is convenient to check the circuits and circuit boards in the electrical box during maintenance, thus reducing maintenance costs;

[0041] 3. A high-pressure cavity is reserved in the rear assembly cover. During processing, after the rear assembly cover is butted with the main pipe body, high-pressure gas can be filled in. The high-pressure gas can counteract the sealing component and the composite material guide component. The sealing component can move to press down the rubber ring, so that the rubber ring is deformed to improve the sealing performance. The composite material guide component can move laterally to increase the connection strength between the composite material guide component and the liquid guide joint and the butt sealing performance between the material guide component and the main pipe body, which can help improve the sealing performance of the rear assembly cover;

[0042] 4. The pressure gauge can monitor the air pressure in the high-pressure chamber. If the air pressure is insufficient, the backstage alarm can be issued in time to remind the operation and maintenance personnel to inflate and pressurize to ensure the sealing and facilitate subsequent operation and maintenance;

[0043] 5. A water pipe is arranged on the outside of the main body. The water pipe can be connected with the composite material guide assembly and the internal cooling cover through a liquid guide joint to realize the connection between the rear assembly cover and the outside. When the coolant circulates to the water pipe, it can exchange heat with the water outside the motor through the external fins. The coolant temperature drops rapidly, thereby effectively reducing the temperature inside the rear assembly cover. It can also reduce the operating temperature of the drive assembly, ensure the stable operation of the underwater motor, and reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 The schematic diagram of the structure of the underwater permanent magnet motor of the present invention is shown;

[0046] Figure 2 A schematic diagram of the internal structure of the motor of the present invention is shown;

[0047] Figure 3 A schematic diagram of the internal structure of the rear assembly cover of the present invention is shown;

[0048] Figure 4 A schematic diagram of the composite cable installation structure of the present invention is shown;

[0049] Figure 5 A schematic diagram of the sealing plug plate structure of the present invention is shown;

[0050] Figure 6 Shows Figure 3 A schematic diagram of the enlarged structure at point A;

[0051] Figure 7 A schematic diagram of the connection structure between the sealing plug plate, the outer ring cover and the inner cooling cover of the present invention is shown;

[0052] Figure 8 A schematic diagram of the structure of the housing assembly of the present invention is shown;

[0053] Fig. 9 A schematic diagram of the front assembly cover structure of the present invention is shown;

[0054] Fig.10 A schematic diagram of the structure of the rubber sleeve of the present invention is shown;

[0055] As shown in the figure: 1. Shell assembly, 11. Main body, 12. Front body, 13. Front plate, 14. Rear assembly ring, 141. First through groove, 2. Front assembly cover, 21. Circulation joint, 22. Cooling chamber, 23. First locking screw, 3. Rear assembly assembly, 31. Rear assembly cover, 32. Pressure gauge, 33. Outer ring cover, 331. Sealing ring chamber, 332. Liquid guide joint, 34. Rear plate, 341. Second locking screw, 35. Inner cooling cover, 351. Water guide plate, 352. Support plate, 353. Center hole, 36. Positioning ring, 361. Second through groove, 37. Electrical box, 371 , stepped hole, 4, composite cable, 41, outer sheath, 42, inner sheath, 43, signal cable, 44, air guide tube, 45, resin filling tube, 46, conductive connector, 5, inner drive assembly, 51, stator, 52, rotor, 53, rotating shaft, 6, sealing assembly, 61, partition, 62, pressure tube, 63, rubber ring, 64, resistance block, 7, composite material guide assembly, 71, sealing plug plate, 711, avoidance groove, 712, filling hole, 713, water guide hole, 72, liquid dispensing tube, 73, circulation pump, 74, rubber cover, 75, circulation hose, 8, water guide outer tube, 81, outer fin, 9, reinforcing rod. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] In order to solve the technical problems in the background technology, an underwater permanent magnet motor is provided as follows:

[0058] Combination Figure 1-Figure 10 As shown, the present invention provides an underwater permanent magnet motor,

[0059] The housing assembly 1 comprises a main body 11, a front body 12, a front end plate 13 and a rear assembly ring 14. The front end of the main body 11 is connected to the front body 12, and the rear end is connected to the rear assembly ring 14. The front end of the front body 12 is connected to the front end plate 13. The outer diameter of the main body 11 is not less than the outer diameter of the front end plate 13.

[0060] The inner driving assembly 5 includes a stator 51, a rotor 52 and a rotating shaft 53. The stator 51 is installed in the main tube 11. The rotor 52 is installed inside the main tube 11. The output end of the rotor 52 is connected to the rotating shaft 53. The rotor 52 extends into the front tube 12, and the rotating shaft 53 extends out of the front end plate 13.

[0061] A composite cable 4 extending into the housing assembly 1 and electrically connected to the inner drive assembly 5;

[0062] A front assembly cover 2, which is butted against the front end of the front end plate 13;

[0063] The rear assembly component 3 comprises a rear assembly cover 31, a barometer 32, an outer ring cover 33, and an inner cooling cover 35. The rear assembly cover 31 is assembled at the rear end of the rear assembly ring 14. The outer wall of the rear assembly cover 31 is provided with an outer ring cover 33, and the outer ring cover 33 is sleeved on the side wall of the rear assembly ring 14. A sealing ring cavity 331 is provided inside the outer ring cover 33, and a liquid guide joint 332 is symmetrically installed inside the sealing ring cavity 331; the interior of the outer ring cover 33 is a closed high-pressure cavity, and the outer wall of the outer ring cover 33 is provided with a barometer 32 for detecting the air pressure of the high-pressure cavity; the interior of the outer ring cover 33 is provided with an inner cooling cover 35, and the inner cooling cover 35 is used to reduce the internal working temperature of the housing component 1;

[0064] The outer water pipe 8 is arranged outside the main pipe body 11, the front end of the outer water pipe 8 is connected to the front assembly cover, the rear end is connected to the outer ring cover 33, the outer water pipe 8 is connected to the liquid guide joint 332, and the outer wall of the outer water pipe 8 is provided with an outer fin 81;

[0065] The composite material guide assembly 7 is horizontally placed inside the rear assembly cover 31, the composite material guide assembly 7 penetrates the main pipe body 11, and the end of the composite material guide assembly 7 is inserted into the sealing ring cavity 331; the composite material guide assembly 7 has an independent filling cavity and a liquid guide cavity, the water guide outer pipe 8, the liquid guide cavity and the inner cooling cover 35 are sequentially connected, and the filling cavity is used to fill the sealing ring cavity 331 with epoxy resin; when the air pressure of the high-pressure cavity reaches the standard, the composite material guide assembly 7 fully seals the connection between it and the main pipe body 11;

[0066] The sealing component 6 is vertically placed in the middle of the rear assembly cover 31 . When the air pressure in the high-pressure chamber reaches the standard, the sealing component 6 seals the connection between the composite cable 4 and the rear assembly cover 31 in multiple stages.

[0067] In the above scheme:

[0068] 1. The following multi-stage sealing structure is designed at the connection between the rear assembly cover and the main pipe:

[0069] 1.1. The outer ring cover fits the side wall of the main pipe to form a primary sealing structure;

[0070] 1.2. A sealing ring cavity is provided inside the outer ring cover, and the sealing ring cavity can be filled with epoxy resin to form a secondary sealing structure. The epoxy resin can seal the joint between the outer ring cover and the main body, the joint between the main body and the rear assembly cover, and the connection of the liquid guide joint to prevent water leakage of the liquid guide joint;

[0071] 1.3. The contact surface between the main body and the sealing ring cover forms a three-level sealing structure;

[0072] 2. The following multi-level sealing structure is designed at the connection between the rear assembly cover and the composite cable:

[0073] 2.1. The outer sheath of the composite cable contacts the bottom surface of the rear assembly cover to form a primary sealing structure;

[0074] 2.2. The contact part between the inner sheath of the composite cable and the stepped hole forms a secondary sealing structure;

[0075] 2.3. The contact part between the rubber ring of the sealing assembly and the stepped hole forms a three-level sealing structure;

[0076] 2.4. The partition of the sealing component can form a four-level sealing structure from the inside. If the first three-level sealing structure is damaged and water enters, the partition can prevent water from entering the drive component again, avoiding damage to the drive component. It is convenient to check the circuits and circuit boards in the electrical box during maintenance, thus reducing maintenance costs;

[0077] 3. A high-pressure cavity is reserved in the rear assembly cover. During processing, after the rear assembly cover is butted with the main pipe body, high-pressure gas can be filled in. The high-pressure gas can counteract the sealing component and the composite material guide component. The sealing component can move to press down the rubber ring, so that the rubber ring is deformed to improve the sealing performance. The composite material guide component can move laterally to increase the connection strength between the composite material guide component and the liquid guide joint and the butt sealing performance between the material guide component and the main pipe body, which can help improve the sealing performance of the rear assembly cover;

[0078] 4. The pressure gauge can monitor the air pressure in the high-pressure chamber. If the air pressure is insufficient, the backstage alarm can be issued in time to remind the operation and maintenance personnel to inflate and pressurize to ensure the sealing and facilitate subsequent operation and maintenance;

[0079] 5. A water pipe is arranged on the outside of the main body. The water pipe can be connected with the composite material guide assembly and the internal cooling cover through a liquid guide joint to realize the connection between the rear assembly cover and the outside. When the coolant circulates to the water pipe, it can exchange heat with the water outside the motor through the external fins. The coolant temperature drops rapidly, thereby effectively reducing the temperature inside the rear assembly cover. It can also reduce the operating temperature of the drive assembly, ensure the stable operation of the underwater motor, and reduce energy consumption.

[0080] In this embodiment, the composite cable 4 includes an outer sheath 41, an inner sheath 42 is provided inside the outer sheath 41, a signal cable 43, an air duct 44 and a resin filling tube 45 are integrated inside the inner sheath 42, a conductive connector 46 is provided at the end of the signal cable 43, the conductive connector 46 is electrically connected to the inner drive component 5, the air duct 44 is used to exhaust air into the high-pressure chamber, and the resin filling tube 45 is connected to the composite material guide component 7.

[0081] In the above scheme: the outer sheath is the main protective structure of the cable, and the inner sheath can pass through the stepped hole; the resin filling tube, the air duct and the signal cable are integrated in the inner sheath for easy insertion into the rear assembly cover; the outer ends of the resin filling tube and the air duct can be sealed by sealing plugs when not in use, and a one-way valve can be added to the outlet end of the air duct to avoid gas backflow; the resin filling tube and the air duct are extended outwardly, which can facilitate the staff to inject resin and inflate from the outside when the rear assembly cover is assembled with the main pipe body.

[0082] In this embodiment, the rear assembly cover 31 includes an electrical box 37 and a rear end plate 34. The front end outer wall of the electrical box 37 is provided with a rear end plate 34. The rear end plate 34 is connected to the rear assembly ring 14 through a second locking screw 341. A stepped hole 371 is opened in the middle of the rear end surface of the electrical box 37. The outer sheath 41 stops at the rear end surface of the electrical box 37, and the inner sheath 42 passes through the stepped hole.

[0083] In the above scheme: the rear end plate is the connection structure between the rear assembly cover and the main pipe body, the electrical box is the installation area of ​​the electrical components, and the outer ring cover is arranged at the outer edge of the rear end plate.

[0084] In this embodiment, the sealing assembly 6 includes a partition 61, a pressing tube 62, a rubber ring 63 and a resistance block 64. The partition 61 is vertically slidably placed inside the electrical box 37. A pressing tube 62 is provided in the middle of the bottom surface of the partition 61. The rubber ring 63 is sleeved on the outer wall of the inner sheath 42. The rubber ring 63 is embedded in the inner top of the stepped hole. The bottom end of the pressing tube 62 is attached to the surface of the rubber ring 63. The pressing tube 62 is used to press the rubber ring 63 downward to deform the rubber ring 63 to increase the sealing performance. The inner sheath 42 extends into the pressing tube 62, and the signal cable 43, the air guide tube 44 and the resin filling tube 45 are all sealed and pass through the partition 61.

[0085] In the above scheme: the partition can play a partitioning effect, and when the partition moves downward, it can drive the pressure tube to move downward, and the pressure tube can press down the rubber ring to deform the rubber ring; a plurality of stop bolts are screwed on the top of the partition, and the stop bolts are fitted and stopped on the surface of the partition to prevent the partition from shaking upward;

[0086] Both the air guide tube and the resin filling tube are interference fit through the bulkhead.

[0087] In this embodiment, the composite material guide assembly 7 includes a sealing plug plate 71, a liquid dispensing tube 72, and a circulation hose 75. A first through groove 141 is symmetrically provided inside the rear assembly ring 14. A positioning ring 36 is provided in the middle of the surface of the rear end plate 34. A second through groove 361 is symmetrically provided on the inner wall of the positioning ring 36. The first through groove 141 and the second through groove 361 are arranged opposite to each other. The sealing plug plate 71 passes through the first through groove 141 and the second through groove 361. The outer end of the sealing plug plate 71 extends into the sealing ring cavity 331, and the inner end extends into the positioning ring 36. The sealing plug plate 71 is symmetrically provided with two groups. A filling cavity and a liquid guide cavity are symmetrically provided inside the sealing plug plate 71. The inner end of the filling cavity is communicated with the liquid dispensing tube 72, and the liquid dispensing tube 72 is communicated with the resin filling tube 45. A resisting block 64 is provided on the top surface of the partition plate 61. The resisting block 64 is in contact with the inclined surface of the inner end of the sealing plug plate 71.

[0088] In the above scheme:

[0089] 1. The sealing plug plate is designed to integrate the filling cavity and the liquid guide cavity. When the sealing plug plate is inserted into the first through groove, the liquid guide cavity and the liquid guide joint are connected, the filling cavity and the sealing ring cavity are connected, and the rubber cover and the first through groove are fitted together;

[0090] 2. The abutment block can fit with the inner end inclined surface of the sealing plug plate to realize the linkage action between the partition plate and the sealing plug plate;

[0091] 3. The resin filling tube outputs the resin to the liquid dispensing tube, which is then dispersed into the filling cavities of the two sealing insert plates, and then the resin liquid is filled into the sealing ring cavity.

[0092] In this embodiment, the outer end of the sealing plug plate 71 is provided with an avoidance groove 711, a filling hole 712 and a water guide hole 713. The filling hole 712 and the water guide hole 713 are symmetrically arranged on both sides of the avoidance groove 711. The filling hole 712 is connected to the filling cavity, and the water guide hole 713 is connected to the liquid guide cavity. A rubber cover 74 is provided on the outer wall of the outer end of the sealing plug plate 71. The side section of the rubber cover 74 is a structure with a narrow outer side and a wide inner side. The liquid guide cavity is connected to the inner cooling cover 35 through a circulation hose 75, and a circulation pump 73 is built into the circulation hose 75.

[0093] In the above scheme:

[0094] 1. The setting of the avoidance groove allows the stud to penetrate the avoidance groove and be inserted into the main pipe when the locking bolt is screwed on;

[0095] 2. The water in the liquid guide cavity is connected to the inner cooling cover through a circulating hose and a circulating pump.

[0096] In this embodiment, the top surface of the inner cooling cover 35 is fitted with the stator 51, and a center hole 353 for the conductive connector 46 to pass through is opened at the center of the top surface of the inner cooling cover 35. The bottom surface of the inner cooling cover 35 is provided with multiple groups of support plates 352 and two groups of water guide plates 351. The water guide plates 351 are symmetrically arranged, and the sealing plug plates 71 are fitted and pass through the bottom of the water guide plates 351. The circulating hose 75 is connected to the water guide plates 351, and the support plates 352 are vertically arranged on the surface of the rear end plate 34.

[0097] In the above scheme: the inner cooling cover can absorb the heat in the rear assembly cover and the heat of the drive component.

[0098] In this embodiment, a cooling chamber 22 is provided inside the front assembly cover 2 , a circulation joint 21 is symmetrically provided on the bottom surface of the front assembly cover 2 , and the top end of the water-conducting outer pipe 8 is plugged into the circulation joint 21 .

[0099] In the above scheme: the setting of the cooling cavity and the circulation joint of the front assembly cover can increase the flow path of the coolant and increase the cooling effect; the front assembly cover can also reduce the temperature of the drive component from the front end, and assist in improving the cooling effect of the underwater motor.

[0100] In this embodiment, a plurality of groups of reinforcing rods 9 are provided between the front assembly cover 2 and the outer ring cover 33 . The plurality of groups of reinforcing rods 9 are distributed in a ring array, and the reinforcing rods 9 are used to enclose and protect the outer shell assembly 1 .

[0101] In the above scheme, the reinforcing rod can not only connect the front assembly cover and the rear assembly cover into one body to increase the overall strength of the underwater motor, but also protect the main pipe body from the side to prevent the main pipe body from being hit or bumped.

[0102] A method for processing an underwater permanent magnet motor, the method comprising the following steps:

[0103] S1, inserting the inner drive assembly 5 into the outer shell assembly 1;

[0104] S2, put the rear assembly component 3 on the rear end of the main body 11, and screw the second locking screw 341 into the rear assembly ring 14;

[0105] S3, pre-insert the outer water guide pipe 8 and the reinforcing rod 9 onto the surface of the outer ring cover 33;

[0106] S4, insert the front assembly cover 2 into the outer wall of the front end plate 13, the water guide outer pipe 8 and the reinforcing rod 9 are plugged into the front assembly cover, and the cooling cavity 22, the water guide outer pipe 8, the liquid guide joint 332, the liquid guide cavity and the inner cooling cover 35 form a circulating cooling channel; screw the first locking screw 23 to fix the front assembly cover on the front end plate 13;

[0107] S5. High-pressure gas is discharged into the high-pressure chamber through the air guide pipe 44. The high-pressure gas drives the partition plate 61 to move downward, so that the pressure tube 62 presses the rubber ring 63 downward. At the same time, the abutment block 64 abuts against the sealing insert plate 71 to move outward, so that the rubber cover 74 fits tightly with the first through groove 141.

[0108] S6. Resin liquid is added to the filling cavity through the resin filling tube 45. The resin liquid fills the sealing ring cavity 331 and seals the connection points at both ends of the liquid guide connector 332 and the connection point between the first locking screw 23 and the rear end plate 34 at the same time.

[0109] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0110] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An underwater permanent magnet motor, characterized in that: include: The housing assembly comprises a main pipe body, a front pipe body, a front end plate and a rear assembly ring, the front end of the main pipe body is connected to the front pipe body, the rear end is connected to the rear assembly ring, the front end of the front pipe body is connected to the front end plate, and the outer diameter of the main pipe body is not less than the outer diameter of the front end plate; The inner driving assembly includes a stator, a rotor and a rotating shaft. The stator is installed in the main pipe body. The rotor is installed inside the main pipe body. The output end of the rotor is connected to the rotating shaft. The rotor extends into the front pipe body, and the rotating shaft extends out of the front end plate. a composite cable extending into the housing assembly and electrically connected to the inner drive assembly; A front assembly cover, which is butted against the front end of the front end plate; A rear assembly component, comprising a rear assembly cover, a pressure gauge, an outer ring cover, and an inner cooling cover. The rear assembly cover is assembled at the rear end of the rear assembly ring. The outer wall of the rear assembly cover is provided with an outer ring cover, which is sleeved on the side wall of the rear assembly ring. A sealing ring cavity is provided inside the outer ring cover, and liquid guide joints are symmetrically installed inside the sealing ring cavity. The interior of the outer ring cover is a closed high-pressure cavity, and a pressure gauge for detecting the air pressure of the high-pressure cavity is installed on the outer wall of the outer ring cover. The interior of the outer ring cover is provided with an inner cooling cover, which is used to reduce the internal working temperature of the housing component. The outer water-conducting pipe is arranged at intervals on the outside of the main pipe body, the front end of the outer water-conducting pipe is connected to the front assembly cover, the rear end is connected to the outer ring cover, the outer water-conducting pipe is connected to the liquid-conducting joint, and the outer wall of the outer water-conducting pipe is provided with an outer fin; The composite material guide assembly is horizontally placed inside the rear assembly cover, the composite material guide assembly penetrates the main pipe body, and the end of the composite material guide assembly is inserted into the sealing ring cavity; the composite material guide assembly has an independent filling cavity and a liquid guide cavity, the water guide outer pipe, the liquid guide cavity and the inner cooling cover are sequentially connected, and the filling cavity is used to fill the sealing ring cavity with epoxy resin; when the air pressure of the high-pressure cavity reaches the standard, the composite material guide assembly fully seals the connection between it and the main pipe body; The sealing component is vertically placed in the middle of the rear assembly cover. When the air pressure of the high-pressure chamber reaches the standard, the sealing component seals the connection between the composite cable and the rear assembly cover in multiple stages.

2. An underwater permanent magnet motor according to claim 1, characterized in that: The composite cable includes an outer sheath, an inner sheath is arranged inside the outer sheath, a signal cable, an air guide tube and a resin filling tube are integrated inside the inner sheath, a conductive connector is arranged at the end of the signal cable, the conductive connector is electrically connected to the inner driving component, the air guide tube is used to exhaust air into the high-pressure cavity, and the resin filling tube is connected to the composite material guide component.

3. An underwater permanent magnet motor according to claim 2, characterized in that: The rear assembly cover includes an electrical box and a rear end plate. The front end outer wall of the electrical box is provided with a rear end plate, and the rear end plate is connected to the rear assembly ring through a second locking screw. A stepped hole is opened in the middle of the rear end surface of the electrical box, the outer sheath stops at the rear end surface of the electrical box, and the inner sheath passes through the stepped hole.

4. An underwater permanent magnet motor according to claim 3, characterized in that: The sealing assembly includes a partition, a compression tube, a rubber ring and an abutment block. The partition is vertically slidably placed inside the electrical box. A compression tube is provided in the middle of the bottom surface of the partition. The rubber ring is sleeved on the outer wall of the inner sheath. The rubber ring is embedded in the inner top of the stepped hole. The bottom end of the compression tube is attached to the surface of the rubber ring. The compression tube is used to press the rubber ring downward to deform the rubber ring to increase the sealing performance. The inner sheath extends into the compression tube, and the signal cable, air duct and resin filling tube are all sealed and pass through the partition.

5. An underwater permanent magnet motor according to claim 4, characterized in that: The composite material guide component includes a sealing plug plate, a liquid dispensing tube, and a circulation hose. A first through groove is symmetrically provided inside the rear assembly ring. A positioning ring is provided in the middle of the surface of the rear end plate. A second through groove is symmetrically provided on the inner wall of the positioning ring. The first through groove and the second through groove are arranged opposite to each other. The sealing plug plate passes through the first through groove and the second through groove. The outer end of the sealing plug plate extends into the sealing ring cavity, and the inner end extends into the positioning ring. Two groups of sealing plug plates are symmetrically provided. A filling cavity and a liquid guide cavity are symmetrically provided inside the sealing plug plate. The inner end of the filling cavity is communicated with the liquid dispensing tube, and the liquid dispensing tube is communicated with the resin filling tube. A resistance block is provided on the top surface of the partition plate, and the resistance block is in contact with the inclined surface of the inner end of the sealing plug plate.

6. An underwater permanent magnet motor according to claim 5, characterized in that: The outer end of the sealing plug plate is provided with an avoidance groove, a filling hole and a water guide hole, the filling hole and the water guide hole are symmetrically arranged on both sides of the avoidance groove, the filling hole is connected with the filling cavity, the water guide hole is connected with the liquid guide cavity, the outer wall of the outer end of the sealing plug plate is provided with a rubber cover, the side section of the rubber cover is a structure of narrow outside and wide inside, the liquid guide cavity is connected with the inner cooling cover through a circulation hose, and the circulation hose is equipped with a circulation pump.

7. An underwater permanent magnet motor according to claim 6, characterized in that: The top surface of the inner cooling cover is fitted with the stator, and a center hole for the conductive connector to pass through is opened at the center of the top surface of the inner cooling cover. The bottom surface of the inner cooling cover is provided with multiple groups of support plates and two groups of water guide plates, the water guide plates are symmetrically arranged, the sealing plug plates are fitted and pass through the bottom of the water guide plates, the circulating hoses are connected to the water guide plates, and the support plates are vertically arranged on the surface of the rear end plate.

8. An underwater permanent magnet motor according to claim 7, characterized in that: A cooling cavity is provided inside the front assembly cover, a circulation joint is symmetrically provided on the bottom surface of the front assembly cover, and the top end of the water guide outer pipe is plugged with the circulation joint.

9. An underwater permanent magnet motor according to claim 8, characterized in that: A plurality of groups of reinforcing rods are arranged between the front assembly cover and the outer ring cover. The plurality of groups of reinforcing rods are distributed in a circular array, and the reinforcing rods are used to enclose and protect the outer shell components.

10. A method for processing an underwater permanent magnet motor, characterized in that: Using the underwater permanent magnet motor described in claim 9, the processing method comprises the following steps: S1. Insert the inner drive assembly into the outer shell assembly; S2, put the rear assembly component on the rear end of the main pipe body, and screw the second locking screw into the rear assembly ring; S3, pre-inserting the water guide outer pipe and the reinforcing rod on the surface of the outer ring cover; S4. Insert the front assembly cover on the outer wall of the front end plate, plug the water guide outer pipe and the reinforcing rod into the front assembly cover, and the cooling cavity, the water guide outer pipe, the liquid guide joint, the liquid guide cavity and the inner cooling cover form a circulating cooling channel; screw on the first locking screw to fix the front assembly cover on the front end plate; S5. High-pressure gas is discharged into the high-pressure chamber through the air guide pipe. The high-pressure gas drives the partition plate to move downward, so that the pressure tube presses down the rubber ring. At the same time, the abutment block abuts the sealing plug plate to move outward, so that the rubber cover fits tightly with the first through groove. S6. Resin liquid is added to the filling cavity through the resin filling tube. The resin liquid is filled into the sealing ring cavity and simultaneously seals the connection points at both ends of the liquid guide joint and the connection point between the first locking screw and the rear end plate.

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