A double-layer interlaced water-cooled heat dissipation stator assembly for a linear motor and a thermal management method

Abstract

The present application relates to linear motor stator structure technical field, specifically, it relates to a kind of double-layer interlaced water-cooling heat dissipation stator assembly and thermal management method for linear motor, including stator unit and the heat dissipation unit being arranged below it, stator unit includes the metal yoke plate with the liquid passage being opened in inside.The heat dissipation unit includes a group of parallelly arranged liquid storage box, the flow divider being arranged at the both ends of liquid storage box, the peristaltic pump being arranged outside the liquid inlet end of liquid passage and the trigger being arranged above flow divider.The present application is switched to another liquid storage box that has completed heat dissipation by setting two liquid storage boxes alternately as working liquid source to supply cooling liquid to stator liquid passage, so that stator always obtains the continuous supply of low-temperature cooling liquid when the temperature of working liquid source increases.

Description

Technical Field

[0001] This invention relates to the field of linear motor stator structure technology, and more specifically, to a double-layer staggered water-cooled heat dissipation stator assembly and thermal management method for linear motors. Background Technology

[0002] During operation, linear motors generate a large amount of heat in their stator windings and core, which causes the stator temperature to rise, affecting the motor's thrust output, operating accuracy, and service life. Therefore, effective heat dissipation is one of the key issues in linear motor design.

[0003] Patent application number CN202521649322.9 discloses a stator structure for a linear motor, including a stator body and a housing, with the stator body mounted on the outer wall of the housing; it also includes a heat exchange device, a heat conduction device, a delivery pump, a first delivery pipe, a second delivery pipe, multiple sets of connectors, multiple sets of bolts, and a semiconductor cooler. The delivery pump draws cooling water from the housing through the first delivery pipe, and the drawn cooling water is delivered to the heat exchange device, where the cooling water is cooled down.

[0004] Currently, the main heat dissipation methods for linear motor stators include natural cooling, air cooling, and water cooling. Among these, water cooling is widely used in high-power linear motors due to its high heat dissipation efficiency. However, existing linear motor water cooling systems typically only have one coolant circulation loop. As the coolant circulates within the stator, its temperature gradually increases, leading to a continuous decrease in heat dissipation efficiency. Under high-load continuous operation conditions, the heat exchange capacity is significantly reduced, severely affecting motor performance.

[0005] In view of this, this application proposes a double-layer interleaved water-cooled heat dissipation stator assembly for linear motors and a thermal management method thereon. Summary of the Invention

[0006] The purpose of this invention is to provide a double-layer staggered water-cooled heat dissipation stator assembly for linear motors and a thermal management method, which solves the problems mentioned in the background art by setting two liquid storage boxes to alternately serve as working liquid sources to supply coolant to the stator liquid passage.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A double-layer staggered water-cooled heat dissipation stator assembly for a linear motor includes a stator unit and a heat dissipation unit disposed below it. The stator unit includes a metal yoke plate with a liquid channel inside. The heat dissipation unit includes a set of parallel liquid storage boxes, diversion valves at both ends of the liquid storage boxes, a peristaltic pump located outside the liquid inlet of the liquid passage, and a trigger located above the diversion valves. The diversion valve is equipped with a rotatable valve core. The liquid inlet side of the diversion valve is connected to two liquid storage boxes respectively. The liquid outlet side of the diversion valve flows through a peristaltic pump and is connected to a liquid passage. The valve core can only conduct the liquid passage between one of the liquid storage boxes and the liquid passage at any given time through its internal flow path. The trigger is connected to the valve core and is used to drive the valve core to rotate to switch the liquid storage box connected to the liquid passage. During the process of driving the valve core to rotate and switch the liquid storage box, the trigger first shuts off the peristaltic pump and then starts the peristaltic pump after the valve core has rotated to the correct position.

[0008] In the technical solution of the present invention, the stator unit further includes several magnets adhered and fixed to the metal yoke plate, a bracket welded to the bottom of the metal yoke plate, and a sealing plate fixed to the outside of the liquid passage tank wall by screws. The bracket has several regularly distributed vent holes through it, and the sealing plate has a convex tube connected to the liquid passage tank.

[0009] In the technical solution of the present invention, the heat dissipation unit further includes a blower, which includes two mounting plates arranged symmetrically on top of each other, a plurality of filter grilles fixedly connected to the outside of the circular holes on the mounting plates by screws, a connecting frame fixedly connected to the two mounting plates by screws, and a heat dissipation fan fixedly connected to the bottom surface of the lower mounting plate by screws. The mounting plates have through grooves at the corners of their ends, and positioning notches are provided on the bottom surface of the mounting plates. The liquid storage box is disposed inside the two mounting plates and located on the air inlet side of the heat dissipation fan.

[0010] In the technical solution of the present invention, the heat dissipation unit further includes a plurality of heat dissipation fins arranged at intervals and sleeved on the outer wall of a set of liquid storage boxes. The heat dissipation fins are used to assist the coolant in the liquid storage box in heat dissipation and cooling.

[0011] In the technical solution of the present invention, the diversion valve includes a valve tube fixed in the positioning notch, two branch tubes welded to the outer wall of the valve tube, a sealing cover welded and fixed to the outer side of the branch tube wall, and a button cap threaded to one end of the valve tube; a limiting groove is formed through the top surface of the valve tube, the two branch tubes are respectively connected to two liquid storage boxes, and the end of the valve tube is connected to the liquid inlet of the peristaltic pump.

[0012] In the technical solution of the present invention, the valve core is rotatably disposed inside the valve tube, and two liquid passage holes are opened on the valve core. The two liquid passage holes are radially distributed and arranged at a distance of 180°. A guide groove is opened at the end of the valve core. Both ends of the guide groove are straight grooves and the middle is a spiral groove.

[0013] In the technical solution of the present invention, the peristaltic pump is fixedly connected to the bracket on the outer wall of the mounting plate by bolts. The heat dissipation unit also includes a motor and a contactor fixedly connected to the top surface of the mounting plate by bolts. The output shaft of the motor is coaxially connected to the rotor inside the peristaltic pump. The contactor is provided with two tactile switches, both of which are electrically connected to the peristaltic pump.

[0014] In the technical solution of the present invention, the trigger includes an electric push rod fixedly connected to the top surface of the mounting plate by bolts, a slider connected to the telescopic end of the electric push rod, a lever disposed on the slider, and a pressure block welded to the outer wall of the slider. The bottom end of the lever passes through the limiting groove and slides in cooperation with the guide groove. The slider is slidably disposed in the groove. When the pressure block moves with the slider, it contacts two tactile switches in sequence to control the start and stop of the peristaltic pump.

[0015] In the technical solution of the present invention, the heat dissipation unit further includes a liquid passage pipe, which is connected between the convex tube of the sealing plate, the diversion valve, and the peristaltic pump to form a circulation path for the coolant. A temperature sensor is provided inside the wall of the liquid passage pipe at the outlet of the liquid passage groove to detect the temperature of the coolant and control the action of the trigger according to the detection signal.

[0016] On the other hand, the present invention also provides a thermal management method for a linear motor using a double-layer staggered water cooling system, comprising the following steps: S1. Start the peristaltic pump. The coolant in the first storage box enters the liquid channel of the metal yoke plate through the diversion valve to cool the stator unit with water. The coolant after absorbing heat flows back to the first storage box. S2. When it is necessary to switch the liquid storage box, the trigger first shuts off the peristaltic pump to stop the flow of coolant, and then drives the valve core to rotate, switching the diverter valve to connect the second liquid storage box with the liquid passage tank. S3. After the valve core rotates to the position, the trigger restarts the peristaltic pump, and the coolant in the second liquid storage box enters the liquid passage through the diversion valve to dissipate heat from the stator unit. S4. The two liquid storage boxes work alternately to achieve staggered circulation heat dissipation.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. The linear motor uses a double-layer staggered water-cooled stator assembly and thermal management method. By setting two liquid storage boxes to alternately supply coolant to the stator liquid channel as working liquid source, when the temperature of the working liquid source rises, it switches to another liquid storage box that has completed heat dissipation, so that the stator always receives a continuous supply of low-temperature coolant, effectively avoiding the problem of reduced heat dissipation efficiency after the coolant temperature rises in a single-loop water-cooling system.

[0018] 2. The linear motor uses a double-layer staggered water-cooled heat dissipation stator assembly and thermal management method. By triggering the valve core to rotate and switch the liquid storage box, the peristaltic pump is first turned off and then started after the valve core has rotated to the correct position. This achieves the liquid circuit switching sequence of first stopping the pump, then switching, and finally starting the pump. This ensures that the liquid in the pipeline is in a static state during the rotation of the valve core, avoiding pressure shock and leakage risks during the liquid circuit switching process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the stator unit structure in this invention; Figure 3 This is a partial structural diagram of the stator unit in this invention; Figure 4 This is a schematic diagram showing the structural breakdown of the heat dissipation unit in this invention; Figure 5 This is one of the structural disassembly diagrams of the blower component in this invention; Figure 6 This is the second structural disassembly diagram of the blower component in this invention; Figure 7 This is a schematic diagram of the heat dissipation unit in this invention; Figure 8 For the present invention Figure 7 An enlarged schematic diagram of part A in the middle; Figure 9 This is one of the partial structural schematic diagrams of the heat dissipation unit in this invention; Figure 10 This is a second schematic diagram of a portion of the heat dissipation unit in this invention; Figure 11 This is a schematic diagram of the flow divider valve in this invention; Figure 12 This is a cross-sectional schematic diagram of the flow divider valve in this invention; Figure 13 This is a schematic diagram of the valve core structure in this invention; Figure 14 This is a top-section sectional view of the valve core structure in this invention; Figure 15 This is a schematic diagram of the trigger structure in this invention; Explanation of reference numerals in the attached figures: 100. Stator unit; 110. Metal yoke plate; 111. Liquid passage tank; 120. Magnet; 130. Support; 131. Vent hole; 140. Sealing plate; 200. Heat dissipation unit; 210. Blower; 211. Mounting plate; 2110. Slide groove; 2111. Positioning notch; 212. Filter grille; 213. Connecting bracket; 214. Cooling fan; 220. Liquid storage box; 230. Heat dissipation fins; 240. Diverter valve; 241. Valve pipe; 2410. Limiting groove; 242. Branch pipe; 243. Sealing cover; 244. Button cover; 245. Valve core; 2451. Liquid passage hole; 2452. Guide groove; 250. Peristaltic pump; 260. Motor; 270. Contactor; 280. Trigger; 281. Electric actuator; 282. Slider; 283. Toggle lever; 284. Pressure block; 290. Liquid passage pipe; 291. Temperature sensor. Detailed Implementation

[0020] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0021] Please see Figures 1-3 As shown, this embodiment provides a technical solution: A double-layer staggered water-cooled stator assembly for a linear motor includes a stator unit 100 and a heat dissipation unit 200 disposed below it. The stator unit 100 includes a metal yoke plate 110 with an internal coolant channel 111, several magnets 120 adhered and fixed to the metal yoke plate 110, a bracket 130 welded to the bottom of the metal yoke plate 110, and a sealing plate 140 fixed to the outside of the coolant channel 111 by screws. The coolant channel 111 is used for coolant to flow through to remove the heat generated during stator operation. The coolant channel 111 has a structure of multiple parallel straight channels, which are connected in series by connecting channels at their ends to form a meandering path, thereby extending the flow path and heat exchange time of the coolant in the metal yoke plate 110. Several regularly distributed vent holes 131 are provided through the bracket 130 for the flow of heat dissipation airflow, and the sealing plate 140 has a protruding tube connected to the coolant channel 111.

[0022] Please see Figures 4-6 As shown, in this embodiment, the heat dissipation unit 200 includes a blower 210, a set of parallel liquid storage boxes 220, multiple heat dissipation fins 230 spaced apart and sleeved on the outer wall of the set of liquid storage boxes 220, diversion valves 240 disposed at both ends of the liquid storage boxes 220, a peristaltic pump 250 disposed outside the liquid inlet of the liquid channel 111, a motor 260, a contactor 270, a trigger 280 disposed above the diversion valve 240, and a liquid passage pipe 290. The heat dissipation fins 230 are used to assist the coolant in the liquid storage boxes 220 in heat dissipation and cooling.

[0023] Furthermore, the blower component 210 includes two symmetrically arranged mounting plates 211, several filter grilles 212 fixed to the outside of the circular holes on the mounting plates 211 by screws, a connecting bracket 213 fixed to the two mounting plates 211 by screws, and a cooling fan 214 fixed to the bottom surface of the lower mounting plate 211 by screws. A sliding groove 2110 is provided through the corner of the mounting plate 211, and a positioning notch 2111 is provided on the bottom surface of the mounting plate 211. The coolant reservoir 220 is disposed inside the two mounting plates 211 and located on the air intake side of the cooling fan 214. The cooling fan 214 is an axial flow fan that draws in air from one side of the coolant reservoir 220 when rotating. The airflow passes through the heat dissipation fins 230 on the surface of the coolant reservoir 220 and is then discharged, achieving forced air cooling of the coolant in the coolant reservoir 220. The coolant reservoir 220 is a set of two independent containers arranged side by side, each used to store coolant, forming a dual-source coolant system. The heat dissipation fins 230 are used to increase the heat dissipation area and assist the coolant in the liquid storage box 220 to dissipate heat and cool down.

[0024] Please see Figures 7-14 As shown, in this embodiment, the diversion valve 240 includes a valve tube 241 fixed in the positioning notch 2111, two branch tubes 242 welded to the outer wall of the valve tube 241, a sealing cover 243 welded and fixed to the outer side of the branch tube 242, a button cap 244 threaded to one end of the valve tube 241, and a valve core 245 rotatably connected to the valve tube 241. A limiting groove 2410 is formed through the top surface of the valve tube 241. The two branch tubes 242 are respectively connected to two liquid storage boxes 220. The end of the valve tube 241 is connected to the inlet of the peristaltic pump 250.

[0025] Furthermore, the inlet side of the diversion valve 240 is connected to two liquid storage boxes 220 respectively, and the outlet side of the diversion valve 240 flows through the peristaltic pump 250 and is connected to the liquid passage 111. The valve core 245 conducts the liquid passage between one of the liquid storage boxes 220 and the liquid passage 111 at any given time through its internal flow path. The valve core 245 is rotatably disposed inside the valve tube 241, and two liquid passage holes 2451 are opened on the valve core 245. The two liquid passage holes 2451 are radially distributed and arranged at a distance of 180°. A guide groove 2452 is opened at the end of the valve core 245. The two ends of the guide groove 2452 are straight grooves and the middle is a spiral groove.

[0026] Furthermore, such as Figure 10As shown, the peristaltic pump 250 is bolted to a bracket on the outer wall of the mounting plate 211. The heat dissipation unit 200 also includes a motor 260 and a contactor 270 bolted to the top surface of the mounting plate 211. The output shaft of the motor 260 is coaxially connected to the rotor inside the peristaltic pump 250 to drive the rotor to rotate and deliver coolant. The contactor 270 is equipped with two tactile switches, both of which are electrically connected to the peristaltic pump 250. The heat dissipation unit 200 also includes a liquid flow pipe 290, which connects the convex tube of the sealing plate 140 to the diversion valve 240 and the peristaltic pump 250 to form a circulation path for the coolant. A temperature sensor 291 is provided inside the wall of the liquid flow pipe 290 at the outlet of the liquid flow tank 111 to detect the temperature of the coolant and control the action of the trigger 280 based on the detection signal.

[0027] Please see Figure 15 As shown, in this embodiment, the trigger 280 includes an electric actuator 281 fixed to the top surface of the mounting plate 211 by bolts, a slider 282 connected to the telescopic end of the electric actuator 281, a lever 283 disposed on the slider 282, and a pressure block 284 welded to the outer wall of the slider 282. The bottom end of the lever 283 passes through the limiting groove 2410 and slides in cooperation with the guide groove 2452. The slider 282 is slidably disposed in the sliding groove 2110. When the pressure block 284 moves with the slider 282, it contacts two tactile switches in sequence to control the start and stop of the peristaltic pump 250. The trigger 280 is drivenly connected to the valve core 245 and is used to drive the valve core 245 to rotate to switch the liquid storage box 220 connected to the liquid passage 111. During the process of driving the valve core 245 to rotate and switch the liquid storage box 220, the trigger 280 first shuts down the peristaltic pump 250 and then starts the peristaltic pump 250 after the valve core 245 has rotated to the correct position.

[0028] Specifically, both tactile switches are normally open momentary contact switches, with their moving contacts connected in series with the power supply circuit of the peristaltic pump 250 motor 260. When a tactile switch is pressed, its internal moving contact closes with the stationary contact, the power supply circuit of the motor 260 is connected, and the peristaltic pump 250 starts running; when the tactile switch is released, the moving contact is reset and opened under the action of the internal spring, the power supply circuit of the motor 260 is cut off, and the peristaltic pump 250 stops running.

[0029] It should be noted that the switching action of valve core 245 is achieved by electromechanical coordinated control, and the specific action logic and timing are as follows: In the initial state, the first liquid storage box is operational; the lever 283 is located in the straight groove section at the starting point of the guide groove 2452, the valve core 245 is at the initial angle, one of the two liquid passage holes 2451 is connected to the branch pipe 242 corresponding to the first liquid storage box 220, and the end of the valve pipe 241 is connected to the pipeline corresponding to the liquid inlet of the peristaltic pump 250. At this time, the pressure block 284 presses against the button of the first tactile switch on the toucher 270, so that the tactile switch is in the closed state, the power supply circuit of the motor 260 is turned on, the peristaltic pump 250 is in the running state, and the coolant in the first liquid storage box 220 continues to circulate under the drive of the peristaltic pump 250 to dissipate heat from the stator unit 100.

[0030] During the switching trigger phase, the pump stops; temperature sensor 291 collects the temperature signal of the coolant at the outlet of the liquid channel 111 in real time. This temperature signal is amplified by a signal conditioning circuit and sent to the controller, such as the A / D conversion port of a PLC or microcontroller. The controller compares the collected temperature value with an internally preset temperature threshold. When the controller determines that the detected temperature has exceeded the preset threshold for a set period, it sends an extension command to the electric actuator 281. The electric actuator 281 is energized and its telescopic rod extends, pushing the slider 282 along the slide groove 2110 in a direction away from the electric actuator 281.

[0031] In the initial stage of slider 282's movement, pressure block 284 moves synchronously with slider 282 and gradually disengages from the button of the first tactile switch. The instant pressure block 284 completely disengages from the first tactile switch, the internal contacts of the tactile switch disconnect under spring force, the power supply circuit of motor 260 is cut off, peristaltic pump 250 immediately stops operating, and coolant flow in the pipeline ceases. During this stage, lever 283 moves along the starting straight section of guide groove 2452, and valve core 245 has not yet rotated.

[0032] As the valve core rotates, slider 282 continues to slide, and lever 283 enters the middle spiral groove section of guide groove 2452. Because limiting groove 2410 restricts lever 283 to linear movement only along the axial direction of valve tube 241, and the spiral section of guide groove 2452 extends spirally relative to the axis of valve core 245, lever 283 applies a tangential force to the spiral groove wall of guide groove 2452 during linear movement. The torque generated by this tangential force drives valve core 245 to rotate around its own axis within valve tube 241. As lever 283 moves along the spiral groove section, valve core 245 gradually rotates 180°.

[0033] During this process, the pressure block 284 is located within the interval area between the two tactile switches, both of which are in the released open state. The motor 260 remains stationary, and the peristaltic pump 250 does not operate. Throughout the entire valve core rotation, the coolant remains stationary, avoiding the impact of fluid dynamic pressure on the valve core sealing surface and effectively reducing the risk of leakage.

[0034] During the switching completion phase, lever 283 enters the straight groove section at the end of guide groove 2452, valve core 245 has rotated into position, and the two liquid passage holes 2451 complete a 180° reversal, with the liquid passage hole originally connected to the first liquid storage box switching to connect to the second liquid storage box.

[0035] At the same time, the pressure block 284 moves with the slider 282 to the position of the second tactile switch and presses its button, closing the second tactile switch, reconnecting the power supply circuit of the motor 260, and restarting the peristaltic pump 250. The coolant in the second liquid storage box 220, driven by the peristaltic pump 250, enters the liquid flow tank 111 through the diversion valve 240, starting a new round of heat dissipation cycle.

[0036] At this point, a complete liquid circuit switching action is completed, and the entire process achieves the timing control of stopping the pump first, then switching and starting the pump again.

[0037] The thermal management method for a linear motor using a double-layer staggered water cooling system of the present invention includes the following steps: S1. Start the peristaltic pump 250. The coolant in the first liquid storage box 220 enters the liquid channel 111 of the metal yoke plate 110 through the diversion valve 240 to cool the stator unit 100 with water. The coolant after absorbing heat flows back to the first liquid storage box 220. S2. When it is necessary to switch the liquid storage box 220, the trigger 280 first shuts off the peristaltic pump 250 to stop the flow of coolant, and then drives the valve core 245 to rotate, switching the diverter valve 240 to connect the second liquid storage box 220 with the liquid passage 111. S3. After the valve core 245 rotates to the position, the trigger 280 restarts the peristaltic pump 250, and the coolant in the second liquid storage box 220 enters the liquid channel 111 through the diversion valve 240 to dissipate heat from the stator unit 100. S4, the two liquid storage boxes 220 work alternately to achieve staggered circulation heat dissipation.

[0038] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the specification and its equivalents.

Claims

1. A double-layer staggered water-cooled stator assembly for a linear motor, comprising a stator unit and a heat dissipation unit disposed below it, characterized in that: The stator unit includes a metal yoke plate with an internal liquid passage groove; The heat dissipation unit includes a set of parallel liquid storage boxes, diversion valves at both ends of the liquid storage boxes, a peristaltic pump located outside the liquid inlet of the liquid passage, and a trigger located above the diversion valves. The diversion valve is equipped with a rotatable valve core. The liquid inlet side of the diversion valve is connected to two liquid storage boxes respectively. The liquid outlet side of the diversion valve flows through a peristaltic pump and is connected to a liquid passage. The valve core can only conduct the liquid passage between one of the liquid storage boxes and the liquid passage at any given time through its internal flow path. The trigger is connected to the valve core and is used to drive the valve core to rotate in order to switch the liquid storage box connected to the liquid passage tank. During the process of driving the valve core to rotate and switch the liquid storage box, the trigger first shuts off the peristaltic pump and then starts the peristaltic pump after the valve core has rotated to the correct position.

2. The double-layer interlaced water-cooled stator assembly for linear motors according to claim 1, characterized in that: The stator unit also includes several magnets adhered and fixed to the metal yoke plate, a bracket welded to the bottom of the metal yoke plate, and a sealing plate fixed to the outside of the liquid passage tank wall by screws. The bracket has several regularly distributed vent holes, and the sealing plate has a protruding tube that communicates with the liquid passage tank.

3. The double-layer interlaced water-cooled stator assembly for linear motors according to claim 2, characterized in that: The heat dissipation unit also includes a blower, which includes two mounting plates arranged symmetrically on top of each other, several filter grilles fixed to the outside of the round holes on the mounting plates by screws, a connecting frame fixed to the two mounting plates by screws, and a heat dissipation fan fixed to the bottom surface of the lower mounting plate by screws. The mounting plates have through grooves at the corners of their ends, and positioning notches are provided on the bottom surface of the mounting plates. The liquid storage box is located inside the two mounting plates and on the air inlet side of the heat dissipation fan.

4. The double-layer interlaced water-cooled stator assembly for linear motors according to claim 3, characterized in that: The heat dissipation unit also includes multiple heat dissipation fins arranged at intervals and sleeved on the outer wall of a set of liquid storage boxes. The heat dissipation fins are used to assist the coolant in the liquid storage box in dissipating heat and cooling down.

5. The double-layer interlaced water-cooled stator assembly for linear motors according to claim 4, characterized in that: The diversion valve includes a valve tube fixed in the positioning notch, two branch tubes welded to the outer wall of the valve tube, a sealing cover welded to the outer side of the branch tube wall, and a button cap threaded to one end of the valve tube; a limiting groove is formed through the top surface of the valve tube, the two branch tubes are respectively connected to two liquid storage boxes, and the end of the valve tube is connected to the liquid inlet of the peristaltic pump.

6. The double-layer interlaced water-cooled stator assembly for linear motors according to claim 5, characterized in that: The valve core is rotatably disposed inside the valve tube. Two liquid passage holes are opened on the valve core. The two liquid passage holes are radially distributed and arranged at a distance of 180°. A guide groove is opened at the end of the valve core. Both ends of the guide groove are straight grooves and the middle is a spiral groove.

7. The double-layer interleaved water-cooled stator assembly for linear motors according to claim 6, characterized in that: The peristaltic pump is fixedly connected to the bracket on the outer wall of the mounting plate by bolts. The heat dissipation unit also includes a motor and a contactor fixedly connected to the top surface of the mounting plate by bolts. The output shaft of the motor is coaxially connected to the rotor inside the peristaltic pump. The contactor is equipped with two tactile switches, both of which are electrically connected to the peristaltic pump.

8. The double-layer interlaced water-cooled stator assembly for linear motors according to claim 7, characterized in that: The trigger includes an electric actuator fixed to the top surface of the mounting plate by bolts, a slider connected to the telescopic end of the electric actuator, a lever set on the slider, and a pressure block welded to the outer wall of the slider. The bottom end of the lever passes through the limiting groove and slides in cooperation with the guide groove. The slider is slidably set in the groove. When the slider moves, the pressure block contacts two tactile switches in sequence to control the start and stop of the peristaltic pump.

9. The double-layer interleaved water-cooled stator assembly for a linear motor according to claim 8, characterized in that: The heat dissipation unit also includes a liquid passage pipe, which is connected between the convex tube of the sealing plate, the diversion valve, and the peristaltic pump to form a circulation path for the coolant. A temperature sensor is provided inside the wall of the liquid passage pipe at the outlet of the liquid passage tank to detect the temperature of the coolant and control the action of the trigger according to the detection signal.

10. A thermal management method for a linear motor using a double-layer staggered water-cooled stator assembly as described in claim 9, characterized in that... Includes the following steps: S1. Start the peristaltic pump. The coolant in the first storage box enters the liquid channel of the metal yoke plate through the diversion valve to cool the stator unit with water. The coolant after absorbing heat flows back to the first storage box. S2. When it is necessary to switch the liquid storage box, the trigger first shuts off the peristaltic pump to stop the flow of coolant, and then drives the valve core to rotate, switching the diverter valve to connect the second liquid storage box with the liquid passage tank. S3. After the valve core rotates to the position, the trigger restarts the peristaltic pump, and the coolant in the second liquid storage box enters the liquid passage through the diversion valve to dissipate heat from the stator unit. S4. The two liquid storage boxes work alternately to achieve staggered circulation heat dissipation.

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