A water-cooled motor

Abstract

This utility model discloses a water-cooled motor, including a DC brushless motor. A housing 1 contains a stator, rotor, and an inner groove, externally connected to an inlet / outlet electric valve. A housing 2 contains a motor controller, a cooling heat absorption box, and an isolation cover. The inlet pipe and cooling return bend pipe within the inner groove are connected to the cooling heat absorption box via a distribution pipe and an outlet pipe, forming a closed water-cooling circulation path. First and second temperature sensors monitor the temperature inside the housing 1 cavity and the isolation cover, respectively, and transmit the signals to the intelligent controller to control the electric valve. Beneficial effects: efficient heat dissipation, ensuring motor stability; intelligent temperature control, energy saving and reliability; adaptability to complex working conditions; compact and lightweight structure; long lifespan and low maintenance.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a water-cooled motor. Background Technology

[0002] In the application of miniaturized high-pressure pump sets in the water treatment industry, the heat dissipation performance of the matching motor is a key factor affecting the stability of the equipment. When traditional brushless motors operate under high-load conditions such as high-pressure pump sets, the stator windings, rotor, and motor controller, among other core components, continuously generate a large amount of heat. Because existing brushless motors generally lack efficient heat dissipation structures and rely solely on natural air cooling or simple passive cooling methods, the heat inside the motor is difficult to dissipate quickly, resulting in a significant increase in the temperature of the core components.

[0003] When a motor is kept at a high temperature for a long time, it will cause a series of problems: On the one hand, the high temperature will accelerate the aging of the winding insulation material, reduce the electrical performance and service life of the motor, and may even lead to faults such as insulation breakdown and short circuit; on the other hand, the high temperature will affect the stability of the electronic components in the motor controller, resulting in a decrease in control accuracy and operating efficiency. In severe cases, it may trigger the motor overheat protection shutdown, interrupting the normal operation of the water treatment system.

[0004] Especially in confined environments and other special operating conditions, limited airflow further exacerbates heat dissipation difficulties, making the limitations of traditional heat dissipation methods even more prominent. Currently, there are no brushless motors with water-cooled structures designed specifically for the water treatment industry, making it impossible to effectively control motor temperature through active cooling methods. This makes it difficult to meet the stringent thermal management requirements of high-pressure pump sets under continuous operation and complex environments. Therefore, how to introduce efficient water-cooling technology through structural innovation to achieve precise control of motor temperature has become a pressing technical challenge in this field. Utility Model Content

[0005] To address the problems of heat dissipation difficulties and performance degradation or failure of core components due to excessive temperature in existing brushless motors used in small high-pressure pump sets in the water treatment industry under high load and enclosed environments, this utility model provides a DC brushless motor with a water-cooling structure. Through active heat dissipation design, it achieves precise control of motor temperature, solves the thermal management problems of traditional brushless motors in continuous operation and special environments, and meets the needs of water treatment equipment for long-term stable operation, efficient heat dissipation and strong environmental adaptability of motors.

[0006] To achieve the above objectives, the present invention employs the following technical means:

[0007] A water-cooled motor includes a brushless DC motor. The brushless DC motor includes a first housing, a second housing, a sealing plate, and a front end cover. The first housing contains a stator and a rotor. The second housing contains a motor controller and has an external wiring connector that is electrically connected to the motor controller. The rotor is connected to a shaft that is rotatably connected to the first housing. The front end cover contains a bearing connected to the shaft. The first housing contains a positioning ring corresponding to the rotor.

[0008] The first housing has an inner groove, and the first housing is connected to an inlet electric valve and an outlet electric valve. The second housing has a cooling and heat absorption box and an isolation cover wrapped around the motor controller.

[0009] The inner groove is connected to an inlet pipe connected to an electric inlet valve and a cooling return bend pipe connected to an electric outlet valve. The inlet pipe and the cooling return bend pipe are connected to the cooling heat absorption box through a water distribution pipe and an outlet pipe to form a closed water cooling circulation path.

[0010] The inner wall of the groove is inlaid with a first temperature sensor corresponding to an inner cavity of the shell. The isolation cover is connected to a second temperature sensor and an intelligent controller electrically connected to a wiring connector. The first temperature sensor, the second temperature sensor, the inlet electric valve, and the outlet electric valve are respectively electrically connected to the intelligent controller.

[0011] A further embodiment of this invention is that the inner groove extends axially along an inner wall of the housing.

[0012] A further embodiment of this invention is that the first temperature sensor is a thermocouple temperature sensor, and the second temperature sensor is a resistance temperature sensor.

[0013] A further embodiment of this invention is that the inlet pipe, the distribution pipe, the cooling heat absorption box, the outlet pipe, and the cooling return bend are all made of stainless steel.

[0014] A further embodiment of this invention is that the isolation cover is made of aluminum alloy.

[0015] A further embodiment of this invention is that the isolation cover includes a cover body, and the outer side wall of the cover body is connected to heat dissipation fins.

[0016] A further embodiment of this invention is that the cover and the heat dissipation fins are integrally manufactured.

[0017] A further aspect of this invention is that the intelligent controller is the Jingchuang MC-80 temperature controller.

[0018] A further embodiment of this invention is that the cooling folding bend has a serpentine structure and is arranged closely around the stator.

[0019] A further embodiment of this invention is that both the inlet electric valve and the outlet electric valve are electric butterfly valves.

[0020] The beneficial effects of this utility model are:

[0021] 1. High-efficiency active heat dissipation performance: Through the integrated water inlet pipe, cooling folding bend pipe and cooling heat absorption box inside the housing, a closed water cooling circulation system is formed, which can quickly remove the heat generated by the stator, rotor and controller during motor operation, significantly improve heat transfer efficiency, avoid performance degradation or failure of core components due to high temperature, and ensure stable operation of the motor for a long time.

[0022] 2. Intelligent temperature control capability: The first and second temperature sensors monitor the temperature of different areas of the motor in real time. Combined with the intelligent controller, the coolant circulation is dynamically adjusted to realize the automatic start and stop and flow control of the heat dissipation system. While achieving efficient heat dissipation, energy waste is avoided, and the motor is ensured to maintain the ideal operating temperature in a wide temperature environment, thereby improving the reliability and stability of operation.

[0023] 3. Advantages in adapting to special environments: The enclosed design of the water-cooled structure allows the motor to dissipate heat without relying on external air circulation, breaking through the limitations of traditional air-cooling methods in enclosed environments; combined with the sealed shell design, it can effectively resist the erosion of internal components by environmental factors such as dust and moisture, enabling the motor to be stably used in complex working conditions such as enclosed, humid, and high-dust environments.

[0024] 4. Compact and lightweight structural design: The water-cooled piping adopts an embedded layout and is integrated with the motor housing. While achieving efficient heat dissipation, it avoids additional volume and weight increase, meeting the water treatment industry's requirements for miniaturized high-pressure pump sets with lightweight equipment and compact installation space, and improving system integration.

[0025] 5. Long lifespan and low maintenance: The design of the brushless DC motor eliminates the wear and tear risks associated with mechanical commutation structures. Combined with water cooling to control the operating temperature of electronic components, it can significantly reduce the aging rate of internal motor components, extend the overall service life of the machine, and reduce maintenance frequency. It is suitable for industrial scenarios with high requirements for reliability and economy. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a cross-sectional view of the present invention;

[0028] Figure 3 This is a side view of the housing of this utility model;

[0029] Figure 4This is a schematic diagram showing the connection between the inlet pipe, the distribution pipe, the cooling heat absorption box, the outlet pipe, and the cooling return bend pipe of this utility model;

[0030] Figure 5 This is a schematic diagram of the structure of the isolation cover of this utility model;

[0031] Figure label:

[0032] 1. Housing 1, Inner groove 2, First temperature sensor 3, Water inlet pipe 4, Housing 2 5, Line connector 6, Water distribution pipe 7, Cooling and heat absorption box 8, Isolation cover 9, Motor controller 10, Second temperature sensor 11, Intelligent controller 12, Sealing plate 13, Water outlet pipe 14, Cooling return bend pipe 15, Stator 16, Shaft 17, Rotor 18, Positioning ring 19, Bearing 20, Water inlet electric valve 21, Water outlet electric valve 22, Front end cover 23, Cover 91, Heat dissipation fins 92. Detailed Implementation

[0033] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] Example 1

[0035] like Figures 1 to 4 As shown, a water-cooled motor includes a DC brushless motor. The DC brushless motor includes a housing 1, a housing 2, a sealing plate 13, and a front cover 23. The housing 1 contains a stator 16 and a rotor 18. The housing 2 contains a motor controller 10 and an external wiring connector 6 that is electrically connected to the motor controller 10. The rotor 18 is connected to a shaft 17 that is rotatably connected to the housing 1. The front cover 23 contains a bearing 20 that is connected to the shaft 17. The housing 1 contains a positioning ring 19 that corresponds to the rotor 18.

[0036] The housing 1 has an inner groove 2 inside, and the housing 1 is connected to an inlet electric valve 21 and an outlet electric valve 22. The housing 2 5 is connected to a cooling heat absorption box 8 and an isolation cover 9 wrapped around the motor controller 10.

[0037] The inner groove 2 is connected to the water inlet pipe 4 connected to the water inlet electric valve 21 and the cooling return bend pipe 15 connected to the water outlet electric valve 22. The water inlet pipe 4 and the cooling return bend pipe 15 are connected to the cooling heat absorption box 8 through the water distribution pipe 7 and the water outlet pipe 14 to form a closed water cooling circulation path.

[0038] The inner wall of the groove 2 is inlaid with a first temperature sensor 3 corresponding to the inner cavity of the shell 1. The isolation cover 9 is connected to a second temperature sensor 11 and an intelligent controller 12 electrically connected to the line connector 6. The first temperature sensor 3, the second temperature sensor 11, the inlet electric valve 21, and the outlet electric valve 22 are respectively electrically connected to the intelligent controller 12.

[0039] Working principle

[0040] After the motor is powered on, the current is transmitted to the motor controller 10 through line connector 6. The motor controller 10 drives the stator 16 to generate a rotating magnetic field, which in turn drives the rotor 18 and shaft 17 to rotate and output power. During this process, water cooling and temperature control are achieved through an independent intelligent temperature control system, as detailed below:

[0041] I. Independent Temperature Control Logic of Intelligent Controller 12

[0042] The intelligent controller 12 is independently powered through the line connector 6 and has no direct electrical connection with the motor controller 10. It is only responsible for temperature monitoring and heat dissipation control.

[0043] The first temperature sensor 3 is embedded in the inner wall of the groove 2 of the housing 1 to monitor the temperature of the inner cavity where the stator 16 and rotor 18 are located in real time; the second temperature sensor 11 is located on the inner wall of the isolation cover 9 to monitor the temperature of the area of ​​the motor controller 10 inside the housing 2.

[0044] The two types of sensors transmit temperature signals to the intelligent controller 12 in real time. When the temperature in any area exceeds the set threshold, the intelligent controller 12 directly triggers the opening of the inlet electric valve 21 and the outlet electric valve 22 to start the coolant circulation. After the temperature drops back to a safe range, the intelligent controller 12 independently controls the electric valves to close, without relying on the signal from the motor controller 10.

[0045] II. Water Cooling Circulation Path and Key Structural Functions

[0046] Coolant circulation control:

[0047] External coolant enters the inlet pipe 4 of housing 1 through the inlet electric valve 21 and flows along the inlet pipe 4 to the distribution pipe 7.

[0048] Water distribution pipe 7 passes through shell 2 5 and is connected to cooling heat absorption box 8. When the coolant flows in cooling heat absorption box 8, it absorbs heat from shell 2 5.

[0049] The isolation cover 9 is wrapped around the outside of the motor controller 10, forming a closed space between it and the inner wall of the housing 2 5, which isolates the cooling heat absorption box 8 from the motor controller 10, preventing the condensate on the surface of the cooling heat absorption box 8 caused by low temperature from directly contacting the electrical components, and preventing the condensate from causing short circuits and other faults.

[0050] After absorbing heat, the coolant flows out of the cooling heat absorption box 8 through the outlet pipe 14, passes through the shell 2 5 again, and enters the cooling return bend pipe 15 of the shell 1.

[0051] Core area heat dissipation:

[0052] The cooling folding bend 15 is embedded in the inner groove 2 of the housing 1 and is arranged closely around the stator 16. It exchanges heat with the inner cavity of the housing 1 through the tube wall and quickly removes the heat generated by the stator 16 and rotor 18 during operation.

[0053] The coolant that has completed its heat dissipation flows into the external recovery equipment through the outlet electric valve 22, forming a closed loop.

[0054] III. Structural Synergy and Temperature Control Advantages

[0055] The inner groove 2 serves as the mounting carrier for the water inlet pipe 4 and the cooling return bend pipe 15. Through its layout design close to the stator 16, it shortens the heat conduction path and improves the heat dissipation efficiency of the core components of the motor.

[0056] The intelligent controller 12 independently controls the heat dissipation system, avoiding coupling with the motor operation control logic, improving the timeliness and reliability of temperature control response, and reducing the risk of electrical interference.

[0057] The anti-condensation design of the isolation cover 9 solves the common condensation problem in water-cooled systems in humid and hot environments by physically isolating the cooling heat absorption box 8 from electrical components, ensuring the safe operation of precision components such as the motor controller 10.

[0058] Example 2

[0059] like Figures 1 to 4 As shown, a water-cooled motor includes a DC brushless motor. The DC brushless motor includes a housing 1, a housing 2, a sealing plate 13, and a front cover 23. The housing 1 contains a stator 16 and a rotor 18. The housing 2 contains a motor controller 10 and an external wiring connector 6 that is electrically connected to the motor controller 10. The rotor 18 is connected to a shaft 17 that is rotatably connected to the housing 1. The front cover 23 contains a bearing 20 that is connected to the shaft 17. The housing 1 contains a positioning ring 19 that corresponds to the rotor 18.

[0060] The housing 1 has an inner groove 2 inside, and the housing 1 is connected to an inlet electric valve 21 and an outlet electric valve 22. The housing 2 5 is connected to a cooling heat absorption box 8 and an isolation cover 9 wrapped around the motor controller 10.

[0061] The inner groove 2 is connected to the water inlet pipe 4 connected to the water inlet electric valve 21 and the cooling return bend pipe 15 connected to the water outlet electric valve 22. The water inlet pipe 4 and the cooling return bend pipe 15 are connected to the cooling heat absorption box 8 through the water distribution pipe 7 and the water outlet pipe 14 to form a closed water cooling circulation path.

[0062] The inner wall of the groove 2 is inlaid with a first temperature sensor 3 corresponding to the inner cavity of the shell 1. The isolation cover 9 is connected to a second temperature sensor 11 and an intelligent controller 12 electrically connected to the line connector 6. The first temperature sensor 3, the second temperature sensor 11, the inlet electric valve 21, and the outlet electric valve 22 are respectively electrically connected to the intelligent controller 12.

[0063] The inner groove 2 extends axially along the inner wall of the shell 1.

[0064] The advantages of the above settings are:

[0065] Increased heat dissipation area: The axially extending groove is equivalent to adding longitudinal heat dissipation fins to the inner wall of the shell, which can increase the contact area with the internal air and accelerate the heat conduction to the outer surface of the shell.

[0066] Guiding fluid flow: Axial grooves can serve as flow channels, forcing the medium to flow along the grooves, avoiding the formation of flow dead zones, and improving heat dissipation uniformity.

[0067] The first temperature sensor 3 is a thermocouple-type temperature sensor, and the second temperature sensor 11 is a resistance temperature sensor.

[0068] The advantages of the above settings are:

[0069] Advantages of thermocouple temperature sensors

[0070] Rapid response to high-temperature regions: The time constant of thermocouples is typically between 0.1 and 1 second, enabling them to quickly capture temperature changes in high-temperature regions such as stator 16;

[0071] Wide range adaptability: Common K-type thermocouples have a measurement range of -200℃ to +1350℃, which is far beyond the normal operating temperature of motors and can easily cope with extreme working conditions.

[0072] Advantages of Resistance Temperature Sensors

[0073] High-precision monitoring of precision components: The measurement accuracy of the resistance temperature detector (RTD) can reach ±0.1℃~±0.3℃, which is suitable for monitoring temperature-sensitive IGBT modules or capacitors in the motor controller 10.

[0074] Linear output simplifies signal processing: The resistance-temperature characteristics of the RTD are close to linear, and high-precision conversion can be achieved without complex calibration, reducing the algorithm complexity of the intelligent controller 12.

[0075] The inlet pipe 4, the branch pipe 7, the cooling heat absorption box 8, the outlet pipe 14, and the cooling return bend pipe 15 are all made of stainless steel.

[0076] The advantages of the above settings are:

[0077] Superior corrosion resistance, adaptable to complex media environments

[0078] Resisting long-term corrosion from coolant: A dense chromium oxide passivation film forms on the surface of stainless steel, which can withstand the chemical corrosion of coolants such as water-based antifreeze and mineral oil; Resisting pitting and electrochemical corrosion: 316L stainless steel contains molybdenum, which is especially suitable for chloride ion environments. Its pitting critical temperature is about 20°C higher than that of 304 stainless steel, avoiding the risk of perforation.

[0079] High mechanical strength to withstand pressure and vibration challenges

[0080] Pressure resistance ensures system safety: Stainless steel has a tensile strength of up to 520MPa, far exceeding that of plastic and copper pipes, and can withstand the normal pressure of 0.3 to 1MPa in the cooling system, and even the water hammer impact of 2 to 3MPa when the water pump starts and stops without breaking; Vibration fatigue resistance extends component life: Stainless steel has a fatigue strength of about 190MPa, which is suitable for high vibration environments of motors.

[0081] Excellent thermal stability ensures efficient heat dissipation.

[0082] Reliable performance in high-temperature environments: Stainless steel has a heat resistance temperature of 400℃~800℃, far exceeding the normal operating temperature of coolant; Optimized balance between thermal conductivity and flow resistance: Although the thermal conductivity of stainless steel is lower than that of copper, the cooling heat absorption box can increase the heat dissipation area by 20%~30% through fin structure design. Combined with the optimization of coolant flow rate, the overall thermal resistance is close to that of copper pipe system.

[0083] The isolation cover 9 is made of aluminum alloy.

[0084] The advantages of the above settings are:

[0085] Lightweight design reduces equipment load

[0086] Significant density advantage: Aluminum alloy has a density of approximately 2.7 g / cm³. 3 It is only 1 / 3 the weight of stainless steel and 2 / 5 the weight of cast iron, reducing the load-bearing pressure on mechanical structures.

[0087] Efficient heat dissipation ensures system temperature control

[0088] Excellent thermal conductivity: Aluminum alloy has a thermal conductivity of 180–230 W / m·K, which is more than 10 times that of stainless steel, avoiding insulation aging caused by localized overheating; Good thermal expansion matching: The coefficient of thermal expansion of aluminum alloy is approximately 23 × 10⁻⁶ W / m·K. -6 / ℃, close to the motor housing, within the operating temperature range of -20℃ to 120℃, the gap at the interface caused by thermal expansion and contraction is less than 0.1mm, far lower than the 0.3mm gap of the stainless steel and aluminum alloy combination, which can reduce the risk of air leakage.

[0089] Example 3

[0090] like Figures 1 to 4As shown, a water-cooled motor includes a DC brushless motor. The DC brushless motor includes a housing 1, a housing 2, a sealing plate 13, and a front cover 23. The housing 1 contains a stator 16 and a rotor 18. The housing 2 contains a motor controller 10 and an external wiring connector 6 that is electrically connected to the motor controller 10. The rotor 18 is connected to a shaft 17 that is rotatably connected to the housing 1. The front cover 23 contains a bearing 20 that is connected to the shaft 17. The housing 1 contains a positioning ring 19 that corresponds to the rotor 18.

[0091] The housing 1 has an inner groove 2 inside, and the housing 1 is connected to an inlet electric valve 21 and an outlet electric valve 22. The housing 2 5 is connected to a cooling heat absorption box 8 and an isolation cover 9 wrapped around the motor controller 10.

[0092] The inner groove 2 is connected to the water inlet pipe 4 connected to the water inlet electric valve 21 and the cooling return bend pipe 15 connected to the water outlet electric valve 22. The water inlet pipe 4 and the cooling return bend pipe 15 are connected to the cooling heat absorption box 8 through the water distribution pipe 7 and the water outlet pipe 14 to form a closed water cooling circulation path.

[0093] The inner wall of the groove 2 is inlaid with a first temperature sensor 3 corresponding to the inner cavity of the shell 1. The isolation cover 9 is connected to a second temperature sensor 11 and an intelligent controller 12 electrically connected to the line connector 6. The first temperature sensor 3, the second temperature sensor 11, the inlet electric valve 21, and the outlet electric valve 22 are respectively electrically connected to the intelligent controller 12.

[0094] like Figure 5 As shown, the isolation cover 9 includes a cover body 91, and heat dissipation fins 92 are connected to the outer side wall of the cover body 91.

[0095] The advantages of the above settings are:

[0096] Increase the heat dissipation surface area: By designing parameters such as fin height, spacing, and thickness, the effective heat dissipation area of ​​the heat dissipation fin can be increased by 3 to 8 times.

[0097] Accelerating air convection: Natural convection scenario: Vertical heat dissipation fins utilize the thermosiphon effect to guide hot air to rise along the gaps between the fins, while cool air is replenished from the bottom, forming a self-circulating convection. The heat dissipation efficiency is 40% to 60% higher than that of a smooth hood.

[0098] Forced convection scenarios: When combined with a fan, the airflow disturbance between the fins is enhanced, and the convective heat transfer coefficient can be increased from 5 to 10 W / (m²) compared to natural convection. 2 • K) increased to 30-50 W / (m 2 ·K), improving heat dissipation capacity by 5 to 8 times, suitable for the rapid cooling needs of high-speed motors.

[0099] Enhanced heat dissipation without increasing volume: In scenarios where the device's external dimensions are strictly limited, the heat dissipation fins can be extended longitudinally rather than laterally to improve heat dissipation capacity without increasing the radial dimension of the shield.

[0100] The cover 91 and the heat dissipation fins 92 are made as a single unit.

[0101] The advantages of the above settings are:

[0102] Integrated heat conduction path with zero interface thermal resistance: The one-piece molded structure allows for uniform distribution of heat flux density and temperature difference control within 2℃.

[0103] Material continuity enhances thermal conductivity: The one-piece molding process creates a continuous metal lattice between the cover and the fins, resulting in a thermal conductivity consistent with that of the raw materials.

[0104] Uniform mechanical properties, vibration and impact resistant: The one-piece molded structure has no weak connection points, and the overall tensile strength can reach more than 95% of the cover material, while the tensile strength of the connection parts of the split structure is only 60% to 70% of the parent material.

[0105] Enhanced corrosion resistance: The joints of split structures are prone to failure due to electrochemical corrosion or crevice corrosion, while the surface of a one-piece molded structure can form a continuous protective layer through anodizing, making it suitable for highly corrosive environments.

[0106] The intelligent controller 12 is the Jingchuang MC-80 temperature controller.

[0107] The advantages of the above settings are:

[0108] High-precision PID algorithm with sensitive dynamic response: Adopting adaptive PID adjustment technology, the temperature control accuracy can reach ±0.1℃, which is better than the ±0.5℃ accuracy of conventional temperature controllers; It supports fuzzy logic control, which can predict the temperature change trend in advance for systems with strong lag, reduce the overshoot by more than 50%, and reduce the compressor start-stop frequency.

[0109] Multi-sensor compatibility, adaptable to complex scenarios: Supports various temperature sensors such as thermistors and thermocouples, and can be connected to different types of probes, making it suitable for diverse scenarios.

[0110] The cooling return bend 15 has a serpentine structure and is arranged tightly around the stator 16.

[0111] The advantages of the above settings are:

[0112] The serpentine structure significantly increases the contact area: compared with the straight tube structure, the effective heat exchange area of ​​the serpentine bend can be increased by 30% to 50%.

[0113] Turbulence enhances heat transfer: Fluid disturbances are generated at the bends of the serpentine pipe, breaking the laminar boundary layer of the cooling medium and increasing the convective heat transfer coefficient by 1.5 to 2 times.

[0114] The tightly wrapped layout shortens the heat conduction path: the distance between the bend and the stator surface can be controlled at 5-10mm, reducing the thermal resistance by more than 50%.

[0115] Both the inlet electric valve 21 and the outlet electric valve 22 are electric butterfly valves.

[0116] The advantages of the above settings are:

[0117] 90° rotation for rapid opening and closing: The electric butterfly valve can be fully opened or closed by rotating the valve stem 90° driven by a motor. The opening and closing time is usually 5 to 15 seconds, which is suitable for scenarios that require rapid start and stop.

[0118] Linear regulation characteristics optimize flow control: The valve plate angle has an approximately linear relationship with the flow rate, and with the help of an intelligent controller, stepless regulation from 0 to 100% can be achieved.

[0119] Small size and light weight: For the same pipe diameter, the axial length of the electric butterfly valve is only 1 / 3 to 1 / 2 of that of the gate valve, and its weight is 40% to 60% lighter.

[0120] The examples provided in this utility model are not intended to limit the implementation methods. Those skilled in the art will recognize that various variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementation methods here, and any obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A water-cooled motor, comprising a DC brushless motor, the DC brushless motor comprising a first housing (1), a second housing (5), a sealing plate (13), and a front end cover (23), wherein the first housing (1) contains a stator (16) and a rotor (18), the second housing (5) contains a motor controller (10) and an external wiring connector (6) electrically connected to the motor controller (10), the rotor (18) is connected to a shaft (17) rotatably connected to the first housing (1), the front end cover (23) contains a bearing (20) connected to the shaft (17), and the first housing (1) contains a positioning ring (19) corresponding to the rotor (18), characterized in that: The first housing (1) has an inner groove (2) inside, and the first housing (1) is connected to an inlet electric valve (21) and an outlet electric valve (22). The second housing (5) is connected to a cooling heat absorption box (8) and an isolation cover (9) wrapped around the motor controller (10). The inner groove (2) is connected to an inlet pipe (4) connected to an inlet electric valve (21) and a cooling return bend pipe (15) connected to an outlet electric valve (22). The inlet pipe (4) and the cooling return bend pipe (15) are connected to the cooling heat absorption box (8) through a water distribution pipe (7) and an outlet pipe (14) to form a closed water cooling circulation path. The inner wall of the groove (2) is inlaid with a first temperature sensor (3) corresponding to the inner cavity of the housing (1). The isolation cover (9) is connected to a second temperature sensor (11) and an intelligent controller (12) electrically connected to the line connector (6). The first temperature sensor (3), the second temperature sensor (11), the water inlet electric valve (21), and the water outlet electric valve (22) are electrically connected to the intelligent controller (12) respectively.

2. A water-cooled motor according to claim 1, characterized in that, The inner groove (2) extends axially along the inner wall of the housing (1).

3. A water-cooled motor according to claim 1, characterized in that, The first temperature sensor (3) is a thermocouple temperature sensor, and the second temperature sensor (11) is a resistance temperature sensor.

4. A water-cooled motor according to claim 1, characterized in that, The inlet pipe (4), the branch pipe (7), the cooling heat absorption box (8), the outlet pipe (14), and the cooling return bend pipe (15) are all made of stainless steel.

5. A water-cooled motor according to claim 1, characterized in that, The isolation cover (9) is made of aluminum alloy.

6. A water-cooled motor according to claim 5, characterized in that, The isolation cover (9) includes a cover body (91), and the outer side wall of the cover body (91) is connected to heat dissipation fins (92).

7. A water-cooled motor according to claim 6, characterized in that, The cover (91) and the heat dissipation fins (92) are made as a single unit.

8. A water-cooled motor according to claim 1, characterized in that, The intelligent controller (12) is the Jingchuang MC-80 temperature controller.

9. A water-cooled motor according to claim 1, characterized in that, The cooling deflection tube (15) has a serpentine structure and is arranged closely around the stator (16).

10. A water-cooled motor according to claim 1, characterized in that, Both the inlet electric valve (21) and the outlet electric valve (22) are electric butterfly valves.

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