Liquid cooling heat dissipation liquid supply system and method suitable for underwater vehicle main drive motor stator

Abstract

The invention discloses a liquid cooling heat dissipation liquid supply system and method suitable for a main drive motor stator of an underwater vehicle, and belongs to the technical field of electrical engineering. The system comprises a liquid supply box body, and a liquid supply pipeline and a control circuit which are arranged in the liquid supply box body, a cooling working medium is introduced into a cooling flow channel of a main drive motor stator through a liquid supply pipeline for circulating heat exchange, then the cooling working medium with waste heat after heat exchange is recycled and flows back to a heat exchanger, and the waste heat is dissipated through the heat exchanger and converted into a low-temperature state to continue circulating heat exchange; and the control circuit is used for monitoring and regulating the operation state of the liquid supply pipeline and supplying power to the whole system. According to the invention, the problem of heat dissipation during high-load operation is effectively solved, and the whole liquid cooling heat dissipation system can be more comprehensively controlled, so that the operation efficiency and stability of the large UUV are greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrical engineering, and in particular relates to a liquid cooling heat dissipation and liquid supply system and method suitable for a stator of a main drive motor of an underwater vehicle. Background Art

[0002] During the operation of modern large-scale electric-powered unmanned underwater vehicles (UUVs), their energy, power and control circuits will generate significant heat. If this heat cannot be discharged in time, the temperature in the cabin will rise sharply, which may cause system failure or even complete paralysis. The traditional heat dissipation mechanism mainly relies on the natural heat dissipation of the vehicle shell to the surrounding environment. However, this passive heat dissipation method is not enough for the heat dissipation needs of modern large-scale UUVs under high-load operation.

[0003] With the advancement of science and technology, the importance of active heat dissipation technology, especially liquid cooling technology, has become increasingly prominent. In liquid cooling technology, it is crucial to accurately monitor and regulate the circulation flow of the cooling medium. Although certain progress has been made in the relevant field in the dedicated closed pressure-resistant liquid cooling and heat dissipation system for large UUVs, the existing system still seems to be unable to meet the needs of efficient and rapid heat dissipation under high heat load scenarios. This challenge mainly stems from the high heat generation of large UUVs when performing complex tasks, coupled with its internal space limitations, making the design and optimization of the cooling system a critical and difficult task. At present, the closed pressure-resistant liquid cooling and heat dissipation system has obvious deficiencies in heat dissipation efficiency, speed and system stability, and has become a bottleneck restricting the further development of large UUV technology.

[0004] Although the application of liquid cooling technology in terrestrial environments, such as heat dissipation of batteries, motors, servers and other equipment, has been quite mature and supported by a number of patents, such as the battery thermal management system and its control method disclosed in the prior art, which combines PCM cooling and liquid cooling to optimize the heat dissipation effect of the battery ears and bottom; the prior art also discloses a multi-branch heat exchange device and a liquid cooling radiator. However, these technologies are not applicable in underwater environments, especially in the application of large UUVs. This is mainly reflected in the lack of a dedicated liquid supply system for the specific heat load of large UUVs, and the inability to achieve overall control of the liquid cooling system. These problems have a serious impact on the performance and stability of large UUVs, limiting the in-depth development of their technology. Summary of the invention

[0005] Technical issues to be solved:

[0006] In order to avoid the shortcomings of the prior art, the present invention provides a liquid cooling and heat dissipation liquid supply system and method suitable for the stator of the main drive motor of an underwater vehicle. The system is modular in design, and the circulating heat dissipation process of the cooling medium is fully optimized by real-time monitoring and closed-loop control of the operating state of the liquid cooling and heat dissipation system of the main drive motor stator, thereby significantly improving the heat dissipation efficiency of the stator of the main drive motor of the UUV. The present invention effectively solves the heat dissipation problem during high-load operation, and can fully control the entire liquid cooling and heat dissipation system, thereby greatly improving the operating efficiency and stability of large UUVs.

[0007] The technical solution of the present invention is: a liquid cooling and heat dissipation liquid supply system suitable for the stator of the main drive motor of an underwater vehicle, including a liquid supply box and a liquid supply pipeline and a control circuit placed therein; the cooling medium is passed into the cooling flow channel of the main drive motor stator through the liquid supply pipeline for circulating heat exchange, and then the cooling medium with residual heat after the heat exchange is recovered and refluxed to the heat exchanger, and the residual heat is dissipated through the heat exchanger and converted into a low-temperature state to continue the circulating heat exchange; the control circuit is used to monitor and regulate the operating state of the liquid supply pipeline and to supply power to the entire system.

[0008] A further technical solution of the present invention is: the liquid supply pipeline includes a cooling supply unit and a waste heat recovery unit;

[0009] The cooling supply unit comprises a main inlet of the liquid supply system, a main pressure transmitter, a high-pressure solenoid valve, a filter, a magnetic pump, a main turbine flowmeter, a main temperature transmitter and a branch outlet of the liquid supply system which are sequentially arranged along the pipeline. The main inlet of the liquid supply system is connected with the output end of the heat exchanger, and the branch outlet of the liquid supply system is connected with the cooling channel input end of the stator of the main drive motor, and the cooling medium is replenished through the cooling medium injection port arranged thereon; the pressure, flow rate and temperature state of the cooling medium in the pipeline are collected through the main pressure transmitter, the main turbine flowmeter and the main temperature transmitter; the flow of the cooling medium in the pipeline is controlled by the high-pressure solenoid valve, and the flow rate of the cooling medium in the pipeline is controlled by the magnetic pump;

[0010] The waste heat recovery unit includes a branch inlet of a liquid supply system, a branch temperature transmitter, a branch turbine flowmeter, a one-way valve and a main outlet of the liquid supply system. It is connected to the cooling channel output end of the stator of the main drive motor through the branch inlet of the liquid supply system, and is connected to the input end of the heat exchanger through the main outlet of the liquid supply system. The temperature and flow of the cooling medium in the pipeline are collected through the branch temperature transmitter and the branch turbine flowmeter, and the flow direction of the cooling medium in the pipeline is controlled by the one-way valve to prevent backflow.

[0011] A further technical solution of the present invention is that the heat exchanger is a double spiral coil heat exchanger, and the internal cooling medium and the external seawater perform a partition-type heat exchange.

[0012] A further technical solution of the present invention is: the control circuit includes a power supply, a PLC and its expansion module, a solid-state relay and a magnetic pump motor controller. The power supply provides electrical energy to all electrical equipment in the liquid supply system, and the PLC and its expansion module collect and control information of the magnetic pump, various sensors and solenoid valves in the liquid supply system.

[0013] A further technical solution of the present invention is: the method for the control circuit to monitor and regulate the operating state of the liquid supply pipeline is to adopt an incremental PID algorithm, based on the deviation between the real-time collected temperature, pressure, and flow data and the preset values, through the calculation of the three links of proportion P, integration I, and differential D, to obtain the incremental adjustment value of the magnetic pump speed and the high-pressure solenoid valve opening, and then through continuous adjustment of these two parameters, complete the dynamic optimization of the cooling medium flow in the liquid cooling system.

[0014] A further technical solution of the present invention is: the inner cavity of the liquid supply box is divided into two independent cavities by a partition, which are used to install the liquid supply pipeline and the control circuit respectively. The partition is sealed and installed in the liquid supply box in a plug-in form to prevent leakage from entering the control circuit.

[0015] A further technical solution of the present invention is: the partition is made of 6061 aluminum alloy material, and its surface is anodized and Teflon electroplated.

[0016] A further technical solution of the present invention is: a cavity wall of the liquid supply box for installing the liquid supply pipeline is provided with a grille-type heat dissipation structure, and the grille-type heat dissipation structure is composed of a number of mutually parallel and evenly spaced rectangular grille holes; the length-to-width ratio of the grille holes is between 5-20, and a 15° inner flare is provided at the entrance of the grille holes to reduce fluid resistance and improve heat dissipation efficiency.

[0017] A further technical solution of the present invention is: a heat sink structure is provided on the cavity wall of the liquid supply box for installing the control circuit, and a microchannel and heat dissipation fins are provided on the surface of the heat sink structure; the microchannel is composed of a plurality of parallel semicircular grooves with a diameter of 0.5-3mm; the heat dissipation fins are arranged in an orderly manner perpendicular to the microchannels, and the fin spacing is 2-4mm; a further technical solution of the present invention is: the power supply, magnetic pump motor controller and solid-state relay in the control circuit are all integrated on the heat sink structure.

[0018] A liquid cooling method for a liquid cooling liquid supply system of a stator of a main drive motor of an underwater vehicle, the specific steps are as follows:

[0019] Injecting cooling medium into the liquid supply pipeline through the cooling medium injection port;

[0020] Simultaneously start the electrical equipment on the control circuit and the liquid supply pipeline;

[0021] The sensor on the liquid supply pipeline collects the operating status of the cooling medium in the pipeline and sends the temperature, pressure and flow data to the control circuit;

[0022] The control circuit regulates the magnetic pump and high-pressure solenoid valve on the liquid supply pipeline according to the received temperature, pressure and flow data;

[0023] When the collected data shows that the temperature exceeds the safety value or the flow rate is less than the set value, it indicates that the heat dissipation capacity of the cooling medium is insufficient; the incremental value of increasing the speed of the magnetic pump is calculated through the incremental PID algorithm to increase the flow rate of the cooling medium and effectively reduce the temperature; at the same time, according to the system pressure data, the opening of the high-pressure solenoid valve is adjusted to ensure that the cooling medium can flow smoothly in the system while increasing the flow rate to avoid local blockage or pressure imbalance;

[0024] When the collected data shows that the temperature is lower than the safety value or the flow rate is greater than the set value, it indicates that the heat dissipation capacity of the cooling medium exceeds the actual demand; the incremental value of reducing the speed of the magnetic pump is calculated through the incremental PID algorithm to reduce the flow rate of the cooling medium; at the same time, the opening of the high-pressure solenoid valve is adjusted to ensure that the system can still maintain a stable pressure and flow state during the process of reducing the flow rate, to prevent system fluctuations caused by sudden changes in flow rate.

[0025] Beneficial Effects

[0026] The beneficial effect of the present invention is that the present invention designs the liquid supply pipeline and the control circuit as separate modules, and independently installs them in the liquid supply box through a partition, so that they can be replaced and repaired separately as needed, avoiding interference and influence between them. The liquid supply box is made of precision-machined 6061 aluminum alloy material, adopts a cubic structure design, and is cleverly divided inside to meet the installation requirements of different components. The box design is sturdy and easy to carry, and at the same time has efficient heat dissipation performance. Thanks to its grille-type heat dissipation structure and integrated heat sink design, it ensures that the internal components of the system can operate stably at the optimal working temperature.

[0027] The liquid supply pipeline of the present invention not only maintains the smooth circulation of the cooling medium between the double spiral coil heat exchanger in the wet cabin and the cooling channel of the main drive motor stator in the dry cabin, but also realizes real-time monitoring of key parameters such as the temperature, pressure and flow of the working medium through segmented design and high-precision sensors equipped along the way. In addition, the magnetic pump technology used when adding cooling medium also further improves the efficiency and stability of the system.

[0028] The control circuit part of the present invention is the key to the intelligence and automation of the system. By integrating components such as power supply, PLC and its expansion module, comprehensive collection and precise control of system information are achieved, thereby ensuring the stable operation of the entire system.

[0029] The invention has excellent performance in the deep-sea closed high-pressure environment. Through integrated design and multiple high-efficiency heat dissipation structures, it successfully solves the technical challenges in this extreme environment. At the same time, the system's real-time monitoring and fault alarm functions also significantly enhance its safety and reliability.

[0030] In summary, the liquid cooling and heat dissipation liquid supply system provided by the present invention, with its compact structural design, efficient heat dissipation performance and intelligent control system, shows a significant cooling effect under deep-sea high-pressure and closed conditions. Its innovation lies in the precise monitoring and intelligent control of the cooling process, as well as the excellent heat dissipation performance, which provides a solid cooling guarantee for the high-power main drive motor and makes an important contribution to promoting the innovation and development of unmanned underwater vehicle technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Front view of the liquid cooling and heat dissipation supply system for the stator of the main drive motor of the underwater vehicle;

[0032] Figure 2 Schematic diagram of the structure of the liquid supply box;

[0033] Figure 3 Schematic diagram of liquid supply pipeline design;

[0034] Figure 4 Schematic diagram of control circuit architecture;

[0035] Figure 5 Schematic diagram of liquid cooling system;

[0036] Figure 6 Detailed diagram of a tube bulkhead fitting.

[0037] Explanation of reference numerals: 1. Liquid supply box, 11. Folding stainless steel handle, 12. Pipeline bracket, 13. Liquid supply box main frame, 14. Aluminum alloy partition, 15. Integrated heat sink structure, 16. Grid-type heat dissipation structure; 2. Liquid supply pipeline, 21. Magnetic pump, 22. Main line temperature transmitter, 23. Main line turbine flowmeter, 24. Filter, 25. High-pressure solenoid valve, 26. Low-pressure solenoid valve, 27. Cooling fluid filling port, 28. One-way valve, 29. Main line Pressure transmitter, 210. Main outlet, 211. Branch turbine flowmeter, 212. Branch temperature transmitter, 213. Main inlet, 214. Branch inlet, 215. Branch outlet; 3. Control circuit, 31. Power supply, 32. PLC and its expansion module, 33. Solid-state relay, 34. Magnetic pump motor controller, 35. Standard DIN electrical rail; 4. Double spiral coil heat exchanger; 5. Main drive motor stator cooling channel; 6. Casing tube through-plate connector. DETAILED DESCRIPTION

[0038] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] Based on the defect that the existing liquid cooling technology is not suitable for underwater vehicles, the present invention provides a liquid cooling liquid supply system and method suitable for the stator of the main drive motor of an underwater vehicle, including a liquid supply box and a liquid supply pipeline and a control circuit disposed therein; the cooling medium is introduced into the cooling channel of the stator of the main drive motor through the liquid supply pipeline for circulating heat exchange, and then the cooling medium with residual heat after the heat exchange is recovered and returned to the heat exchanger, and the residual heat is dissipated through the heat exchanger and converted into a low-temperature state to continue the circulating heat exchange; the control circuit is used for monitoring and regulating the operating state of the liquid supply pipeline and providing power to the entire system.

[0041] Specifically, the liquid supply pipeline includes a cooling supply unit and a waste heat recovery unit;

[0042] The cooling supply unit comprises a main inlet of the liquid supply system, a main pressure transmitter, a high-pressure solenoid valve, a filter, a magnetic pump, a main turbine flowmeter, a main temperature transmitter and a branch outlet of the liquid supply system which are sequentially arranged along the pipeline. The main inlet of the liquid supply system is connected with the output end of the heat exchanger, and the branch outlet of the liquid supply system is connected with the cooling channel input end of the stator of the main drive motor, and the cooling medium is replenished through the cooling medium injection port arranged thereon; the pressure, flow rate and temperature state of the cooling medium in the pipeline are collected through the main pressure transmitter, the main turbine flowmeter and the main temperature transmitter; the flow of the cooling medium in the pipeline is controlled by the high-pressure solenoid valve, and the flow rate of the cooling medium in the pipeline is controlled by the magnetic pump;

[0043] The waste heat recovery unit includes a branch inlet of a liquid supply system, a branch temperature transmitter, a branch turbine flowmeter, a one-way valve and a main outlet of the liquid supply system. It is connected to the cooling channel output end of the stator of the main drive motor through the branch inlet of the liquid supply system, and is connected to the input end of the heat exchanger through the main outlet of the liquid supply system. The temperature and flow of the cooling medium in the pipeline are collected through the branch temperature transmitter and the branch turbine flowmeter, and the flow direction of the cooling medium in the pipeline is controlled by the one-way valve to prevent backflow.

[0044] Specifically, the method for the control circuit to monitor and regulate the operating status of the liquid supply pipeline is to adopt an incremental PID algorithm, based on the deviation between the real-time collected temperature, pressure, and flow data and the preset values, and to obtain the incremental adjustment values ​​of the magnetic pump speed and the high-pressure solenoid valve opening through calculations of the three links of proportional P, integral I, and differential D, and then to complete the dynamic optimization of the cooling medium flow in the liquid cooling system by continuously adjusting these two parameters.

[0045] Specifically, the cavity wall of the liquid supply box for installing the liquid supply pipeline is provided with a grille-type heat dissipation structure, and the grille-type heat dissipation structure is composed of a plurality of rectangular grille holes that are parallel to each other and evenly spaced. When the aspect ratio of the grille holes is between 5 and 20, the strength, stability and heat dissipation performance of the heat dissipation structure are optimal. In addition, the grille holes are designed with an inner flare of no more than 15°, which helps to reduce fluid resistance and improve heat dissipation efficiency.

[0046] Specifically, the cavity wall of the liquid supply box for installing the control circuit is provided with a heat sink structure, and the surface of the heat sink structure is provided with microchannels and heat dissipation fins. The microchannels are in the form of small and parallel semicircular grooves with a diameter ranging from 0.5 to 3 mm. This design effectively increases the heat exchange area and significantly promotes the conduction and convection of heat. The heat dissipation fins adopt a sheet structure and are arranged in an orderly manner perpendicular to the microchannels. The fin spacing is precisely controlled at 2 to 4 mm, which further expands the heat dissipation area and helps to efficiently conduct heat from the heat sink structure to the surrounding environment, thereby ensuring the stable operation of the control circuit. In addition, the heat sink structure has also undergone a special surface treatment process to reduce fluid resistance. The specific processing steps include: first, surface cleaning and pretreatment, including decontamination and degreasing, grinding and polishing, to ensure a clean and smooth surface; then, using precision technology to form microchannels on the surface, and performing surface strengthening treatment to deposit a layer of wear-resistant, corrosion-resistant and thermally conductive film; followed by precision design and processing of the heat sink fins; finally, post-processing and comprehensive quality inspection, including descaling and passivation treatment, to ensure that the heat sink structure fully meets the design requirements and exhibits excellent heat dissipation performance and stable operating characteristics.

[0047] The present invention provides a liquid cooling method for a liquid cooling liquid supply system for a stator of a main drive motor of an underwater vehicle, and the specific steps are as follows:

[0048] Step 1: inject cooling medium into the liquid supply pipeline through the cooling medium injection port;

[0049] Step 2: Start the electrical equipment on the control circuit and the liquid supply pipeline at the same time;

[0050] Step 3: The sensor on the liquid supply pipeline collects the operating status of the cooling medium in the pipeline and sends the temperature, pressure and flow data to the control circuit;

[0051] Step 4: The control circuit regulates the magnetic pump and the high-pressure solenoid valve on the liquid supply pipeline according to the received temperature, pressure and flow data;

[0052] When the collected data shows that the temperature exceeds the safety value or the flow rate is less than the set value, it indicates that the heat dissipation capacity of the cooling medium is insufficient; the incremental value of increasing the speed of the magnetic pump is calculated through the incremental PID algorithm to increase the flow rate of the cooling medium and effectively reduce the temperature; at the same time, according to the system pressure data, the opening of the high-pressure solenoid valve is adjusted to ensure that the cooling medium can flow smoothly in the system while increasing the flow rate to avoid local blockage or pressure imbalance;

[0053] When the collected data shows that the temperature is lower than the safety value or the flow rate is greater than the set value, it indicates that the heat dissipation capacity of the cooling medium exceeds the actual demand; the incremental value of reducing the speed of the magnetic pump is calculated through the incremental PID algorithm to reduce the flow rate of the cooling medium; at the same time, the opening of the high-pressure solenoid valve is adjusted to ensure that the system can still maintain a stable pressure and flow state during the process of reducing the flow rate, to prevent system fluctuations caused by sudden changes in flow rate.

[0054] The above technical solution is further described below in conjunction with the accompanying drawings:

[0055] Reference Figure 1 As shown, the present embodiment is a liquid cooling and heat dissipation liquid supply system suitable for the stator of the main drive motor of an underwater vehicle, and its structure mainly includes three parts: a liquid supply tank 1, a liquid supply pipeline 2 and a control circuit 3.

[0056] The liquid supply box 1 is used to accommodate and support other components. Its main design function is to provide a sufficient internal space to accommodate the various components of the liquid supply pipeline 2 and the control circuit 3. The dotted box area on the left side of the figure represents the liquid supply pipeline 2, while the dotted box on the right side shows the structure of the control circuit 3. In order to ensure the safe and stable operation of the system, a partition is specially set between the two parts to achieve complete isolation of the circuit and the pipeline, thereby effectively preventing the risk of control circuit failure caused by pipe valve leakage. This design not only optimizes the system layout, but also greatly improves the overall safety and reliability.

[0057] Reference Figure 2As shown, the liquid supply box 1 adopts a cubic structure design, and the whole is made of 6061 aluminum alloy sheet through precision processing technology. The box is composed of six aluminum alloy panels, which are firmly connected by precisely designed bite structures and countersunk screws. This structural design significantly improves durability while ensuring the stability of the box. The selection of high-strength and corrosion-resistant 6061 aluminum alloy material further extends the service life of the box and enhances the stability, thereby providing a solid foundation for the reliable operation of the liquid cooling and heat dissipation liquid supply system. The front panel, top panel and right side panel of the liquid supply box 1 are all provided with circular holes to facilitate the assembly and fixation of the sleeve tube through-plate connector 6, and together with the pipeline bracket 12, provide stable support for the liquid supply pipeline 2.

[0058] Inside the liquid supply box 1, the 6061 aluminum alloy partition 14 divides the internal space into two independent areas, which are used to place the liquid supply pipeline 2 and the control circuit 3, respectively, so as to achieve complete physical isolation between the pipeline and the circuit, and effectively prevent mutual interference or damage between the two. In order to cope with the heat generated by the internal components of the liquid supply box 1, the present invention adopts an integrated heat sink structure 15 and a grid-type heat dissipation structure 16, and cooperates with the power supply fan for active heat dissipation. This design ensures the effective control of the temperature inside the box, thereby maintaining the stable operation of the entire system.

[0059] The partition 14 of the present invention is made of 6061 aluminum alloy material and is carefully crafted to become a key component of the internal structure of the box. Its core purpose is to achieve strict physical isolation between the liquid supply pipeline 2 and the control circuit 3, ensuring that the two are completely independent in spatial layout, thereby forming a solid safety barrier. The physical and chemical properties of the partition 14 have been accurately calculated and optimized, and its size and layout are designed to fully cover the area of ​​the liquid supply pipeline 2 while ensuring that the normal operation of the control circuit 3 is not affected. The high strength, hardness, toughness, ductility and corrosion resistance of 6061 aluminum alloy provide the partition 14 with excellent mechanical properties and chemical stability, allowing it to remain stable when subjected to external pressure and impact, and effectively prevent deformation or rupture. The installation interface of the partition 14 is designed as a transition fit plug-in method, and is fastened to the side panel of the box with bolts to ensure its stable position inside the box to prevent loosening or falling off. During the design process, special emphasis was placed on the importance of the sealing performance of the partition 14 to ensure that seawater that enters the propulsion compartment due to failure of the heat exchanger seal is prevented from leaking into the control circuit 3 area through the installation gap, further enhancing the safety of physical isolation. The surface of the partition 14 is anodized and Teflon electroplated, which significantly improves the corrosion resistance and insulation performance. In addition, a grid-type guide groove is designed on the bottom plate of the liquid supply box 1 to reduce the potential impact of cooling fluid leakage on the control circuit 3, providing additional safety protection for the control circuit 3. By adding a 6061 aluminum alloy partition 14, the present invention not only significantly improves the overall reliability of the system, but also effectively responds to the risk of cooling fluid leakage in structural design, and builds an indestructible protective barrier. This design fully demonstrates the core concept of physical isolation. Through reasonable layout and reliable structural design, it achieves effective containment of potential risks and significantly improves the safety and stability of the system.

[0060] In the bottom space on the left side of the liquid supply box 1, the present invention is particularly provided with a pipeline support 12, the main function of which is to provide stable support for the easily deformed part of the liquid supply pipeline 2. This design not only strengthens the stability of the pipeline, but also ensures the safety of the entire liquid supply system. Through this layout, the present invention strives to improve the pipeline support structure, thereby improving the reliability and durability of the entire system.

[0061] Folding stainless steel handles 11 are provided on the left and right side panels of the liquid supply box 1. This design is intended to improve the convenience of the liquid supply system during transportation and installation, thereby improving the overall operating efficiency.

[0062] In the daily operation of the liquid supply system, the liquid supply pipeline 2 and the control circuit 3 will generate heat. In order to ensure that the various components of the liquid supply system operate stably within their optimal temperature range, the present invention specially designs two types of heat dissipation structures on the outer surface of the liquid supply box 1. This design can effectively dissipate the heat generated inside the system to ensure the thermal stability and working performance of the entire liquid supply system.

[0063] The heat dissipation structure is a grille-type heat dissipation structure and a heat sink structure; the power supply, motor controller and solid-state relay are integrated into the heat sink structure 15, and the grille-type heat dissipation structure 16 on the front, rear, right and bottom panels. Among them, the right side panel is precisely processed to form an integrated heat sink structure 15, and the heating component is firmly assembled on its surface by screws.

[0064] Specifically, the panel was processed using high-precision CNC machine tools and advanced heat treatment technology. The raw materials were strictly screened to ensure that they have good thermal conductivity and sufficient mechanical strength. Subsequently, the panel was processed by multi-axis linkage using precision CNC milling technology to achieve precise shaping of complex geometric shapes. During the processing, the cutting parameters and tool paths were strictly controlled to ensure the flatness and dimensional accuracy of the processed surface.

[0065] After processing, the microchannels are presented in the form of small and parallel semicircular grooves with a diameter ranging from 0.5 to 3 mm; the heat sink fins are a sheet structure with a thickness of no more than 1 mm, arranged in an orderly manner perpendicular to the microchannels, and the fin spacing is precisely controlled at 2 to 4 mm. The microchannels and heat sink fins together constitute an integrated heat sink structure15. This structure has an efficient heat conduction path and an increased heat dissipation area, which can quickly transfer heat from the panel surface to the heat sink fins and remove the heat through air convection. In addition, the heat sink structure has undergone special surface treatment to improve its corrosion resistance and thermal radiation efficiency.

[0066] To further improve the heat transfer efficiency, high thermal conductivity silicone grease is evenly applied between the contact surface of the heating component and the heat sink to reduce parasitic thermal resistance and enhance the heat conduction effect. This ensures that the heat generated by the heating component can be quickly and efficiently transferred to the heat sink, thereby achieving effective heat dissipation.

[0067] In addition, the grille-type heat dissipation structure 16 on the panel, as an efficient heat dissipation design solution, has the core advantage of achieving effective conduction and dispersion of heat through a precise structural layout. Specifically, the structure cleverly arranges a series of parallel and evenly spaced rectangular grille holes. These grille holes are made of materials with excellent thermal conductivity, and their arrangement is carefully designed to maximize the heat dissipation area while ensuring smooth air circulation. The grille holes are arranged in a matrix form, which can not only effectively guide the external cold air into the interior of the device and fully exchange heat with the hot air generated by the heating element, thereby accelerating the discharge of heat, but also take into account the functions of dust prevention and foreign body intrusion through reasonable gap control and aspect ratio design, effectively blocking external dust particles, and ensuring the cleanliness and stable operation of the internal environment of the device. It is particularly worth mentioning that the heat dissipation structure also incorporates an innovative diversion design. The grille hole is designed with an inner flare of no more than 15°. This specific angle and shape further optimizes the airflow path, reduces resistance during heat dissipation, and improves heat exchange efficiency. Through the driving action of the power supply fan, the grille-type heat dissipation structure 16 effectively promotes the forced convection of air inside and outside the box, significantly improves the heat transfer efficiency, and thus optimizes the heat dissipation performance of the system. This design shows significant advantages in thermodynamics and provides an important guarantee for ensuring the stable operation of the control circuit 3.

[0068] Reference Figure 3 The design of the liquid supply pipeline 2 is shown, which consists of a low-temperature process and a high-temperature process, and is provided with 7 inlets and outlets for the circulation of the cooling medium. These inlets and outlets are firmly connected to the panel of the liquid supply box 1 through the sleeve pipe plate connector 6.

[0069] Driven by the magnetic pump 21, the low-temperature cooling medium flows out of the double-helix coil heat exchanger 4 in the wet cabin. After the diversion effect of the liquid supply system, these mediums enter the main drive motor stator cooling channel 5 in the dry cabin. In this process, the low-temperature cooling medium absorbs the heat of the stator through conjugate heat transfer, causing its temperature to rise. Subsequently, after the confluence effect of the liquid supply system, these mediums enter the double-helix coil heat exchanger 4 again. In the heat exchanger, after dissipating heat through the inter-wall heat exchange method, the medium is transformed into a low-temperature state, thus entering the next cycle cooling process. Reasonable pipeline layout can achieve effective matching of the flow rate, pressure and temperature of the cooling medium at the diversion and confluence nodes, reduce fluid resistance, prevent eddy and turbulence phenomena caused by sudden changes in flow direction, and thus reduce pressure fluctuations and energy losses.

[0070] Reference Figure 4As shown, the control circuit 3 is mainly composed of a power supply 31, a PLC and its expansion module 32, a solid-state relay 33, and a magnetic pump motor controller 34. Its core function is to collect state parameters such as temperature, pressure, and flow of the cooling medium in real time, realize accurate control of the circulating cooling state, and perform necessary fault diagnosis and isolation. At the same time, in order to ensure the safety and heat dissipation performance of the system, all components are installed in the right space of the liquid supply box 1 and are physically isolated from the pipeline system 2 on the left.

[0071] Reference Figure 5 As shown, the working process of the liquid cooling heat dissipation system of the main drive motor stator of the underwater vehicle is as follows: the process starts with the double spiral coil heat exchanger 4, and the low-temperature cooling medium inside it, driven by the magnetic pump 21, flows through the main pressure transmitter 29, the high-pressure solenoid valve 25, the filter 24, the magnetic pump 21, the main turbine flowmeter 23 and the main temperature transmitter 22 in sequence. Subsequently, the cooling medium is divided through the liquid supply system and enters the main drive motor stator cooling flow channel 5, where it absorbs the heat generated by the stator and is converted into a high-temperature cooling medium.

[0072] After the high-temperature cooling medium flows out of the motor stator cooling channel, it continues to flow through the branch temperature transmitter 212 and the branch turbine flowmeter 211, and then converges again through the liquid supply system. Finally, these high-temperature cooling mediums return to the double spiral coil heat exchanger 4 through the one-way valve 28, completing the whole cycle.

[0073] In the working process of the liquid supply system, the pressure, flow and temperature sensors distributed along the pipeline will collect the state parameters of the cooling medium in real time, and transmit these data to the PLC and its expansion module 32 immediately. The PLC adjusts the speed of the magnetic pump 21 and the switch state of the high-pressure solenoid valve 25 through a closed-loop control strategy based on the return liquid temperature information collected by the branch temperature transmitter 212 to ensure that the cooling system can operate safely and efficiently.

[0074] When the heat load of the main drive motor increases, the branch temperature transmitter 212 will detect that the temperature of the coolant flowing out of the main drive motor stator cooling channel 5 has increased. In this case, the PLC will increase the speed of the magnetic pump 21 to enhance the cooling capacity of the system. Once the return liquid temperature is successfully controlled within the target temperature range, the PLC will reduce the speed of the magnetic pump 21 and reduce the flow of the coolant, thereby achieving the effect of energy saving and consumption reduction.

[0075] During the circulating cooling process, if the double spiral coil heat exchanger 4 in the wet cabin fails to seal and causes leakage, high-pressure seawater will penetrate into the power propulsion compartment. At this time, the main pressure transmitter 29 will first detect the abnormal main pressure and quickly send a signal to the PLC. After receiving the abnormal pressure signal, the PLC will immediately close the high-pressure solenoid valve 25 and stop the operation of the magnetic pump 21 to isolate the fault and block the leakage. At the same time, the liquid supply system will immediately report the fault information and the isolation measures taken to the main control system for further decision.

[0076] Matters not covered in the present invention are all within the known technical field.

[0077] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A liquid cooling and heat dissipation liquid supply system suitable for the stator of the main drive motor of an underwater vehicle, characterized in that: It includes a liquid supply box, a liquid supply pipeline and a control circuit placed therein; the cooling medium is passed into the cooling channel of the stator of the main drive motor through the liquid supply pipeline for circulating heat exchange, and then the cooling medium with residual heat after the heat exchange is recovered and refluxed to the heat exchanger, and the residual heat is dissipated through the heat exchanger and converted into a low-temperature state to continue the circulating heat exchange; the control circuit is used to monitor and regulate the operating state of the liquid supply pipeline and to supply power to the entire system.

2. According to claim 1, a liquid cooling and heat dissipation liquid supply system suitable for the stator of the main drive motor of an underwater vehicle is characterized in that: The liquid supply pipeline includes a cooling supply unit and a waste heat recovery unit; The cooling supply unit comprises a main inlet of the liquid supply system, a main pressure transmitter, a high-pressure solenoid valve, a filter, a magnetic pump, a main turbine flowmeter, a main temperature transmitter and a branch outlet of the liquid supply system which are sequentially arranged along the pipeline. The main inlet of the liquid supply system is connected with the output end of the heat exchanger, and the branch outlet of the liquid supply system is connected with the cooling channel input end of the stator of the main drive motor, and the cooling medium is replenished through the cooling medium injection port arranged thereon; the pressure, flow rate and temperature state of the cooling medium in the pipeline are collected through the main pressure transmitter, the main turbine flowmeter and the main temperature transmitter; the flow of the cooling medium in the pipeline is controlled by the high-pressure solenoid valve, and the flow rate of the cooling medium in the pipeline is controlled by the magnetic pump; The waste heat recovery unit includes a branch inlet of a liquid supply system, a branch temperature transmitter, a branch turbine flowmeter, a one-way valve and a main outlet of the liquid supply system. It is connected to the cooling channel output end of the stator of the main drive motor through the branch inlet of the liquid supply system, and is connected to the input end of the heat exchanger through the main outlet of the liquid supply system. The temperature and flow of the cooling medium in the pipeline are collected through the branch temperature transmitter and the branch turbine flowmeter, and the flow direction of the cooling medium in the pipeline is controlled by the one-way valve to prevent backflow.

3. According to claim 1, a liquid cooling and heat dissipation liquid supply system suitable for the stator of the main drive motor of an underwater vehicle is characterized in that: The heat exchanger is a double spiral coil heat exchanger, in which the internal cooling medium and the external seawater perform a wall-type heat exchange.

4. According to claim 1, a liquid cooling and heat dissipation liquid supply system suitable for the stator of the main drive motor of an underwater vehicle is characterized in that: The control circuit includes a power supply, a PLC and its expansion module, a solid-state relay and a magnetic pump motor controller. The power supply provides power to all electrical equipment in the liquid supply system, and the PLC and its expansion module collect and control information of the magnetic pump, various sensors and solenoid valves in the liquid supply system.

5. According to claim 4, a liquid cooling and heat dissipation liquid supply system suitable for the stator of the main drive motor of an underwater vehicle is characterized in that: The method for the control circuit to monitor and regulate the operating status of the liquid supply pipeline is to adopt an incremental PID algorithm, based on the deviation between the real-time collected temperature, pressure, and flow data and the preset values, and to obtain the incremental adjustment values ​​of the magnetic pump speed and the high-pressure solenoid valve opening through calculations of the three links of proportion P, integration I, and differentiation D, and then to complete the dynamic optimization of the cooling medium flow in the liquid cooling system by continuously adjusting these two parameters.

6. According to claim 1, a liquid cooling and heat dissipation liquid supply system suitable for the stator of the main drive motor of an underwater vehicle is characterized in that: The inner cavity of the liquid supply box is divided into two independent cavities by a partition, which are respectively used to install the liquid supply pipeline and the control circuit. The partition is sealed and installed in the liquid supply box in a plug-in form to prevent leakage from entering the control circuit.

7. According to claim 6, a liquid cooling and heat dissipation liquid supply system suitable for the stator of the main drive motor of an underwater vehicle is characterized in that: The partition is made of 6061 aluminum alloy material, and its surface is anodized and Teflon electroplated.

8. The liquid cooling and heat dissipation liquid supply system suitable for the stator of the main drive motor of an underwater vehicle according to claim 6, characterized in that: The cavity wall of the liquid supply box for installing the liquid supply pipeline is provided with a grille-type heat dissipation structure, which is composed of a number of rectangular grille holes that are parallel to each other and evenly spaced; the length-to-width ratio of the grille holes is between 5-20, and a 15° inner flare is provided at the entrance of the grille holes to reduce fluid resistance and improve heat dissipation efficiency.

9. The liquid cooling and heat dissipation liquid supply system suitable for the stator of the main drive motor of an underwater vehicle according to claim 8, characterized in that: The cavity wall of the liquid supply box for installing the control circuit is provided with a heat sink structure, and microchannels and heat dissipation fins are provided on the surface of the heat sink structure; the microchannel is composed of a plurality of parallel semicircular grooves with a diameter of 0.5-3mm; the heat dissipation fins are arranged in an orderly manner perpendicular to the microchannels, and the fin spacing is 2-4mm; and the power supply, magnetic pump motor controller and solid-state relay in the control circuit are integrated on the heat sink structure.

10. A liquid cooling method for a liquid cooling liquid supply system for a stator of a main drive motor of an underwater vehicle according to any one of claims 1 to 9, characterized in that The specific steps are as follows: Injecting cooling medium into the liquid supply pipeline through the cooling medium injection port; Simultaneously start the electrical equipment on the control circuit and the liquid supply pipeline; The sensor on the liquid supply pipeline collects the operating status of the cooling medium in the pipeline and sends the temperature, pressure and flow data to the control circuit; The control circuit regulates the magnetic pump and high-pressure solenoid valve on the liquid supply pipeline according to the received temperature, pressure and flow data; When the collected data shows that the temperature exceeds the safety value or the flow rate is less than the set value, it indicates that the heat dissipation capacity of the cooling medium is insufficient; the incremental value of increasing the speed of the magnetic pump is calculated through the incremental PID algorithm to increase the flow rate of the cooling medium and effectively reduce the temperature; at the same time, according to the system pressure data, the opening of the high-pressure solenoid valve is adjusted to ensure that the cooling medium can flow smoothly in the system while increasing the flow rate to avoid local blockage or pressure imbalance; When the collected data shows that the temperature is lower than the safety value or the flow rate is greater than the set value, it indicates that the heat dissipation capacity of the cooling medium exceeds the actual demand; the incremental value of reducing the speed of the magnetic pump is calculated through the incremental PID algorithm to reduce the flow rate of the cooling medium; at the same time, the opening of the high-pressure solenoid valve is adjusted to ensure that the system can still maintain a stable pressure and flow state during the process of reducing the flow rate, to prevent system fluctuations caused by sudden changes in flow rate.

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