A direct-drive heat dissipation device for high-precision CNC machine tool linear motor

Abstract

The present invention provides a high-precision CNC machine tool linear motor direct-drive heat dissipation device, the heat dissipation plate includes a shell and a plurality of air flow units, a series of circular hole sleeves are arranged in parallel on the front and rear end surfaces of the shell, a sleeve positioning frame is fixed in the inner wall of each pair of circular hole sleeves, sealing masks are fixed at both ends of the core tube of the air flow unit, the sealing masks are matched and sleeved in the circular hole sleeve of the shell port, a rotating sleeve ring groove and a magnetic ring groove are respectively arranged at both ends of the core tube, the rotating sleeve ring groove is sleeved in the sleeve positioning frame, a magnetic ring is sleeved in the magnetic ring groove, a sealing outer tube is sealed and fixed in the middle section of the core tube to form an annular sealing cavity, a phase change material is sealed and filled in the annular sealing cavity, a fluid heat conducting medium is filled in the circulation cavity surrounded by the shell and the core tube, and flip magnets with the same magnetic direction are respectively installed on the inner side of the linear guide rail. The device comprehensively utilizes the characteristics of airflow cooling, phase change heat absorption, and motion flipping, so that the thermal management of the machine tool under high-speed and high-precision working conditions is more effective and accurate.

Description

Technical Field

[0001] The invention belongs to the technical field of cooling of linear motors of machine tool parts, and in particular relates to a direct-drive heat dissipation device for linear motors of high-precision numerically controlled machine tools. Background Art

[0002] The linear motor of CNC machine tools is an advanced drive device used for high-precision processing. It converts electrical energy directly into mechanical energy through electromagnetic principles to achieve linear motion of machine tools, and no longer relies on traditional transmission devices such as screws and gears. Compared with traditional machine tools, this technology not only provides higher transmission efficiency and faster response speed, but also significantly improves processing accuracy. However, linear motors generate a lot of heat during high-speed operation. Overheating often leads to a decline in motor performance, affecting response speed and processing accuracy. Due to the Joule heat generated by the current flowing through the motor coil and the hysteresis loss in the iron core, its temperature affects error-sensitive components such as linear guides and grating scales, and causes thermal deformation of the structure, affecting the positioning accuracy of the feed system. If the linear motor cannot dissipate heat quickly, the positioning accuracy of the feed system cannot be guaranteed. Therefore, it is necessary to effectively cool the linear motor to prevent the negative impact of motor overheating on performance.

[0003] In the prior art, the heat dissipation of linear motors usually adopts passive heat dissipation methods, such as using heat sinks or ventilation structures to dissipate heat naturally, or building water cooling equipment on the linear motor for heat dissipation. However, the natural heat dissipation of the linear motor during movement cannot reduce the impact of the heat generated by the mover on its positioning accuracy, and the heat dissipation solution using water as the cooling medium is relatively expensive and requires the introduction of external water pipes. Since the linear motor movers in a straight line at high speed, and the root of the external water pipe cannot move, the external water pipe will frequently swing, especially when the workbench space is limited and the reciprocating bending degree of the external water pipe is large, cooling water leakage is likely to occur during the construction and use process. Although these methods can reduce the surface temperature to a certain extent, due to problems such as heat accumulation and high maintenance costs, they cannot meet the heat dissipation requirements of long-term work under high load and high speed conditions.

[0004] With the improvement of industrial automation level and the continuous upgrading of machining precision requirements, traditional heat dissipation methods can no longer meet the heat dissipation needs of modern CNC machine tools under high speed and high load conditions. Therefore, an efficient and dynamic heat dissipation solution is urgently needed to ensure the stability and reliability of linear motors under extreme working conditions, thereby extending their service life and improving overall machining capabilities and precision. Summary of the invention

[0005] In view of the defects and problems existing in the prior art, the present invention provides a direct-drive heat dissipation device for high-precision CNC machine tool linear motors, which aims to improve the heat dissipation efficiency of high-precision CNC machine tool linear motors, prevent the performance degradation caused by overheating of the motor, ensure accuracy and stability during high-speed movement, and achieve rapid heat management through a dynamic heat dissipation mechanism.

[0006] The solution of the present invention to solve the technical problem is: adopt a high-precision CNC machine tool linear motor direct-drive heat dissipation device, which is installed between the base and the motor mover, including a heat dissipation plate, and the heat dissipation plate is fixed on the upper side of the motor mover, wherein the heat dissipation plate includes a shell and a plurality of air flow units, a series of circular hole sleeves are arranged in parallel on the front and rear end surfaces of the rectangular shell, and an annular shaft sleeve positioning frame is fixed in the inner wall of each pair of circular hole sleeves of the shell; the air flow unit includes a core tube, sealing masks are fixed at both ends of the core tube, the sealing masks are matched and sleeved in the circular hole sleeves of the shell port, and a rotating sleeve ring groove and a magnetic ring groove are respectively arranged at both ends of the core tube. The rotating sleeve ring grooves are respectively sleeved in the corresponding shaft sleeve positioning frames, so that the core tube of each air passing unit can rotate independently of each other, and an annular magnetic ring is sleeved in the magnetic ring groove, and a sealed outer tube is sealed and fixed in the middle section of the core tube, and the area between the sealed outer tube and the side wall of the core tube is surrounded by a sealed annular sealed cavity, and the annular sealed cavity is sealed and filled with phase change material. The center of the core tube is an air passage, and the area between the outer shell and the core tube is surrounded by a sealed circulation cavity, and the circulation cavity is filled with a fluid heat transfer medium; flip magnets with the same magnetic direction are respectively installed on the inner sides of two parallel linear guide rails, and the magnetic directions of adjacent flip magnets are opposite.

[0007] Preferably, a series of heat conducting plates are arranged on the side wall of the core tube, and the heat conducting plates are located in both the annular sealing cavity and the gas passage.

[0008] Preferably, a wear-resistant sleeve is sleeved between the shaft sleeve positioning frame and the rotating sleeve ring groove, and a sealing ring is installed at the same time.

[0009] Preferably, an air guide cone ring is mounted inside the sealing cover.

[0010] Preferably, it also includes a workbench, on both sides of the upper part of the workbench the linear guide rails are fixed, the linear guide rails on both sides are respectively matched with guide rail sliders installed, the lower part of the periphery of the base is respectively fixed to the upper part of each guide rail slider, a motor stator is fixed on the upper side of the middle part of the workbench, and the motor mover is fixed between the guide rail sliders on both sides.

[0011] Preferably, an inner cavity is provided in the guide rail slider, and a heat conducting pipe is led out from an interface of the side wall of the circulation cavity and connected to the inner cavity of the front and rear guide rail sliders.

[0012] Preferably, when there are two guide rail sliders on each side of the left and right sides of the motor rotor, the inner cavities of the two guide rail sliders on each side are connected by a connecting pipe. At this time, heat pipes are respectively led out from the front and rear interfaces of the side wall of the circulation cavity, and the front and rear heat pipes are respectively connected to the inner cavities of the front and rear guide rail sliders, and the front and rear guide rail sliders are connected by a connecting pipe.

[0013] Preferably, a heat insulation board is fixed on the upper surface of the heat dissipation plate, and the heat insulation board is fixed below the base.

[0014] Preferably, the core tube is divided into two sections, front and rear sections, and the middle part is sealed and connected together through a sleeve joint, so that the front and rear sections can be relatively telescopic. An annular spring seat is fixed on the inner wall of the middle part of the shell, and springs are respectively installed between the inner end walls of the front and rear sections of the core tube and the spring seat.

[0015] Preferably, the front and rear core tubes can rotate independently or in conjunction. When they need to rotate in conjunction, guide holes are provided on the side walls of the outer tube of the sealing cover, and guide rods are fixed to the ends of the inner tubes, which are sleeved into the corresponding guide holes.

[0016] Beneficial effects of the present invention:

[0017] The device makes comprehensive use of the characteristics of airflow cooling, phase change heat absorption, and motion flipping. It uses the airflow generated by the movement of the motor rotor and passes through the air channel to cool the upper phase change material in the annular sealed cavity to form a solid state. Then, with the help of the magnetic flipping effect of positioning, the upper and lower layers of the annular sealed cavity are replaced by solid state, and the lower layer of the annular sealed cavity is continuously replaced by solid state, while the liquid state of the upper layer of the annular sealed cavity is continuously changed to solid state. The motor rotor is cooled and kept at a constant temperature through the phase change material. This makes the thermal management of the machine tool more effective and accurate under high-speed and high-precision working conditions.

[0018] 1. Dynamic heat dissipation mechanism: The heat dissipation device uses the airflow when the motor moves quickly, combined with the application of phase change materials, to quickly absorb and release heat, ensuring that the motor is kept within a safe temperature range when the machine tool operates at high speed, thereby improving the stability and efficiency of the electromechanical system.

[0019] 2. Magnetic reversal effect: The magnetic ring and reversal magnets are set up to achieve instantaneous reversal of the core tube through the action of the magnetic field, thereby continuously optimizing the position of the phase change material. This reversal mechanism allows solid and liquid materials to alternate in the temperature gradient, maximizing the use of the characteristics of the phase change material for heat management.

[0020] 3. Modular structural design: By setting up the guide rail slider and its internal cooling channel, the moving parts, namely the guide rail slider, can be cooled synchronously. This is especially important during high-speed operation and can prevent the movement accuracy of the parts from decreasing due to thermal expansion.

[0021] 4. All-round thermal isolation and conduction: By installing a heat shield on the heat sink, the thermal isolation between different parts of the machine tool is enhanced to reduce unnecessary heat transfer. In addition, the structural design of the spring seat and guide hole enhances the bearing capacity and flexibility of the entire heat dissipation system.

[0022] 5. Combined application of multiple materials: using phase change materials such as n-octadecane and saturated alkanes combined with heat pipes and fluid heat transfer media, and through sophisticated cavity design, making heat transfer more directional and improving overall heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the assembly relationship between the direct-drive heat dissipation device of the linear motor of a high-precision CNC machine tool and the linear motor of the present invention;

[0024] Figure 2 yes Figure 1 Schematic diagram of the assembly relationship between the heat dissipation plate 3 and the heat insulation plate 2;

[0025] Figure 3 yes Figure 2 A magnified front view of the local structure;

[0026] Figure 4 yes Figure 3 Schematic diagram of the AA section structure;

[0027] Figure 5 yes Figure 3 One of the schematic diagrams of the BB section structure;

[0028] Figure 6 yes Figure 3 The second schematic diagram of the BB section structure;

[0029] Figure 7 yes Figure 4 Schematic diagram of the CC cross-section structure;

[0030] Figure 8 It is a schematic diagram of the assembly relationship between the core tube and the shell;

[0031] Fig. 9 yes Figure 8 Schematic diagram of the cross-sectional structure;

[0032] Fig.10 It is a schematic diagram of the core tube and outer tube structure with wear-resistant sleeves and magnetic ring bodies installed;

[0033] Fig.11 It is a schematic diagram of the actual application process of the present invention.

[0034] Numbers in the figure: base 1; heat insulation plate 2; heat sink 3; core tube 301; sealing cover 302; rotating sleeve ring groove 303; magnetic ring groove 304; sealed outer tube 305; heat conductive sheet 306; wear-resistant sleeve 307; sealing ring 308; magnetic ring body 309; air guide cone ring 310; shell 311; sleeve positioning frame 312; fixing wire 313; annular sealing chamber 314; circulation chamber 315; air passage 316; spring seat 317; inner end wall 318; spring 319; sleeve joint 320; guide hole 321; guide rod 322; motor stator 4; workbench 5; motor mover 6; flip magnet 7; guide rail slider 8; heat pipe 9; connecting pipe 91; interface 92; linear guide 10. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0036] Embodiment 1: Figure 1-Figure 11 .

[0037] A heat dissipation device for a high-precision CNC machine tool linear motor direct-drive linear axis, such as Figure 1 As shown, the device is installed between the base 1 and the motor mover 6, and is mainly used to quickly dissipate the heat of the motor mover 6 to avoid the problem of motor performance degradation and efficiency reduction caused by overheating of the motor mover 6. The effective cooling measures of the device are used to keep the motor running within a safe temperature range.

[0038] Figure 1 and Fig.11 It can be seen that linear guides 10 are fixed on both sides of the upper part of the workbench 5, and a pair of guide rail sliders 8 are installed in parallel at the front and rear positions of each side linear guide 10, and the lower parts of the two side edges of the base 1 are fixed to the upper parts of each guide rail slider 8. A motor stator 4 is fixed in the middle of the workbench 5, a motor mover 6 is fixed between the two side guide rail sliders 8, and a heat sink 3 is fixed above the motor mover 6, as shown in FIG. Figure 2 and Figure 3 As shown, the heat sink 3 is a rectangular plate-shaped structure as a whole, and an interface 92 is installed on the side of the heat sink 3.

[0039] like Figure 4 , Figure 7 and Fig.10As shown, the heat sink 3 includes a shell 311 and a plurality of air flow units. A row of cylindrical channels running through the front and rear end surfaces of the rectangular shell 311 is provided. A series of air flow units are installed in each cylindrical channel, and both ends of each cylindrical channel are round hole sleeves. The air flow units include a core tube 301, a sealing cover 302, a rotating ring groove 303, a magnetic ring groove 304, a sealed outer tube 305, a heat conducting sheet 306, a wear-resistant sleeve 307, a sealing ring 308, a magnetic ring body 309, and an air guide cone ring 310. Sealing covers 302 are fixed at both ends of the core tube 301. The diameter of the sealing cover 302 is larger than the diameter of the core tube 301. The sealing cover 302 can be matched and sleeved in the round hole sleeve of the shell 311 port, and a sealing sleeve is sleeved between the sealing cover 302 and the round hole sleeve of the shell 311, and an air guide cone ring 310 is sleeved in the sealing cover 302. At both ends of the core tube 301 and on the inner side of the sealing cover 302, a rotating sleeve ring groove 303 and a magnetic ring groove 304 are respectively provided, and a wear-resistant sleeve 307 and a magnetic ring body 309 are respectively installed in the rotating sleeve ring groove 303 and the magnetic ring groove 304. A sealed outer tube 305 is sealed and fixed in the middle section of the core tube 301. The sealed outer tube 305 and the core tube 301 are coaxial, and the area between the side walls of the two is surrounded by a sealed annular sealed cavity 314. A series of heat conducting sheets 306 are provided on the side walls of the core tube 301, and each heat conducting sheet 306 runs through the annular sealed cavity 314.

[0040] An annular sleeve positioning frame 312 is fixed to the inner wall of each pair of circular hole sleeves of the housing 311 through fixing wires 313. The rotating sleeve ring grooves 303 at both ends of the core tube 301 are respectively sleeved in the corresponding pair of sleeve positioning frames 312, so that both ends of each air flow unit are sealed and supported in the end circular hole sleeves of the housing 311 and can rotate independently of each other.

[0041] like Figure 8 , Fig.10 As shown, a sealing ring 308 is mounted between the wear-resistant sleeve 307 and the sleeve positioning frame 312. The magnetic ring body 309 mounted in the magnetic ring groove 304 is a multi-polar magnetic ring, which is an integral annular magnet, or a bipolar magnetic ring, that is, magnets are respectively installed on both sides of the annular seat, and the directions of the magnets on both sides are consistent. After each core tube 301 is assembled in the corresponding sleeve positioning frame 312, a structure as shown in FIG. Figure 4 and Figure 5 The structure shown in FIG. 3 is a structure in which the center of the core tube 301 is a gas passage 316, which allows air to pass through; the annular sealed cavity 314 is sealed and filled with a phase change material such as n-octadecane (melting point of about 28-30°C) or a saturated alkane material (melting point of about 36-38°C); the heat conducting sheet 306 is located in both the annular sealed cavity 314 and the gas passage 316; the circulation cavity 315 is filled with a fluid heat conducting medium, such as water or kerosene.

[0042] like Figure 1As shown, a series of slots are provided on the left and right sides of the workbench 5 and on the inner side of the linear guide 10, and flip magnets 7 with the same magnetic direction are installed in each pair of left and right slots, and the magnetic directions of adjacent flip magnets 7 on the same side of the linear guide are opposite.

[0043] The linear motor of a CNC machine tool moves fast, and the motor mover 6 consumes a lot of power and generates a lot of heat. When the motor mover 6 moves forward or backward quickly, it can drive the heat sink 3 to move forward or backward quickly as a whole. When the heat sink 3 moves forward or backward quickly, the indoor airflow will pass through each air passage 316. The airflow passing through the air passage 316 can cool the core tube 301 and its sealed outer tube 305. Since the melting point of n-octadecane is about 28-30°C, the room temperature airflow cooling can cause the upper n-octadecane in the annular sealed cavity 314 to solidify. Since the bottom of the annular sealed cavity 314 is close to the motor mover and is subjected to its heat conduction, the n-octadecane at its bottom usually does not solidify. When each magnetic ring body 309 of the heat sink 3 approaches each pair of flip magnets 7, it is affected by the magnetic field of the left and right flip magnets 7, and the magnetic pole directions of all magnetic ring bodies 309 will change instantly. Among them, if Figure 7 As shown, each core tube 301 is arranged side by side, and a row of magnetic ring bodies 309 close to each other are respectively arranged at the two ends of the core tube 301, and the magnetic poles of the magnetic ring bodies 309 at each end can attract and repel each other, and when any magnetic ring body 309 turns over, all magnetic ring bodies 309 will turn over, thereby prompting the core tube 301 to turn over 180 degrees in an instant. After the core tube 301 turns over 180 degrees, the solid-state n-octadecane at the upper part of the annular sealed chamber 314 is turned over to the bottom, and the liquid n-octadecane at the bottom is turned over to the upper side. The solid n-octadecane at the bottom directly receives the heat from the motor mover 6 and melts, and the melting phase change is utilized to absorb heat rapidly, and the solid-state temperature will not continue to rise after being completely melted. Meanwhile, the liquid n-octadecane at the upper part of the annular sealed chamber 314 is cooled by the airflow and becomes solid again. Therefore, when the motor mover 6 needs to move quickly, the core tube 301 and the annular sealing cavity 314 can always be flipped up and down, thereby realizing the position transformation of solid and liquid n-octadecane. The lower solid-to-liquid absorbs heat from the motor mover 6, and the upper part is far away from the motor mover 6 and is cooled by the airflow and changes from liquid to solid.

[0044] The above device uses dynamic airflow and phase change materials to achieve rapid heat absorption and heat release, keep the motor within the ideal temperature range, and improve the heat dissipation efficiency of the overall system. The magnetic flip mechanism and modular heat conduction design are used to effectively reduce the temperature of the guide rail slider and other key components during high-speed operation, preventing the impact of thermal expansion on motion accuracy. The alternating use of phase change materials in temperature gradient changes not only increases the flexibility of heat management, but also reduces energy consumption and improves the efficiency of material use.

[0045] When the above device is used, the high-precision CNC machine tool and the heat dissipation device are first installed in combination to ensure that the position of the heat dissipation system is closely connected with key components such as the motor mover and the guide rail slider, creating a complete heat dissipation circulation system to provide a basis for subsequent work. Then start the power supply of the CNC machine tool and set the operating parameters (such as speed, load, etc.) to meet the processing requirements. The motor starts to operate, the heat dissipation device automatically turns on, and enters the real-time cooling state. Dynamic heat dissipation starts: When the motor mover moves quickly, the air flow passes through the cooling channel of the heat dissipation device to take away the heat, and the heat dissipation plate and phase change material begin to absorb heat to keep the motor temperature within a safe working range. Flip mechanism activation: According to the operation of the motor, the magnetic ring body and flip magnet in the heat dissipation device automatically rotate with the change of heat, realizing the core tube flipping, and the bottom of the solid phase change material quickly changes to a liquid phase state, which can more effectively absorb the heat from the operating motor mover. Guide rail slider cooling: Through the fluid circulation of the internal heat conduction pipe, the guide rail slider is directly cooled to reduce the heat accumulation caused by friction, maintain the stability and accuracy of movement, and avoid component deformation or work failure caused by overheating. In addition, temperature sensors can be installed to monitor the operating temperature of the motor and guide rails in real time to ensure that the system always operates at the optimal operating temperature and enhance safety and stability. Regularly check all components of the heat dissipation device, clean dust and debris, and ensure smooth airflow. Through the above steps, the heat dissipation device of the high-precision CNC machine tool can ensure the optimal working state of the motor and components during complex and high-intensity operations, thereby improving processing accuracy and the overall performance of the equipment.

[0046] Embodiment 2: Based on the above solution, since the guide rail sliders 8 on both sides will also move back and forth quickly with the motor mover 6, in order to achieve simultaneous cooling of the guide rail sliders 8, an inner cavity can be set in the guide rail slider 8, and the heat pipe 9 is led out from the interface 92 on the side wall of the circulation cavity 315 and connected to the inner cavity of the front and rear guide rail sliders 8. Figure 1As shown, when there are two guide rail sliders 8 on each side of the motor mover 6, the inner cavities of the two guide rail sliders 8 on each side are connected through a connecting pipe 91. At this time, the heat pipe 9 is respectively led out from the front and rear interfaces 92 of the side wall of the circulation cavity 315, and the front and rear heat pipes 9 are respectively connected to the inner cavities of the front and rear guide rail sliders 8, and the front and rear guide rail sliders 8 are connected through the connecting pipe 91. Thus, the fluid heat conduction medium in the circulation cavity 315 also flows into the inner cavity of the guide rail slider 8. When the motor mover 6 moves forward at high speed and straight line, the fluid heat conduction medium in the circulation cavity 315 will move to the rear side due to inertia, thereby forcing the fluid heat conduction medium to flow forward; conversely, when the motor mover 6 moves backward at high speed and straight line, the fluid heat conduction medium in the circulation cavity 315 will move to the front side due to inertia, thereby forcing the fluid heat conduction medium to flow backward. Thus, the heat dissipation plate 3 can be used to conduct heat to the guide rail sliders 8 on both sides, so as to achieve cooling treatment of the guide rail sliders 8 on both sides. A heat exchange tube may also be passed through between the front and rear end surfaces of each guide rail slider 8, with the middle section of the heat exchange tube located in the inner cavity of the corresponding guide rail slider 8. When the guide rail slider 8 moves at high speed, airflow enters the heat exchange tube to take away part of the heat.

[0047] Embodiment three: Based on the above scheme, when the CNC machine tool linear motor moves at high speed, heat is generated by the motor mover 6 and the guide rail slider 8, which needs to be dissipated as quickly as possible to improve the movement accuracy. However, when the CNC machine tool linear motor is stopped, the processing equipment located on the top of the base 1 will also generate heat. In order to avoid the heat of the base 1 being transferred to the motor mover 6 through the heat sink 3, a heat insulation plate 2 can be fixed on the upper surface of the heat sink 3, thereby reducing the thermal conductivity between the base 1 and the motor mover 6. The combined use of the heat sink and the heat insulation plate reduces unnecessary heat conduction and protects the motor mover and the base from being too high in thermal conductivity and affecting stability. Or use the following at the same time Figure 6 When the structure shown in the figure is used, the mutual thermal conductivity between the base 1 and the motor mover 6 can be further isolated. Figure 6In the embodiment, the core tube 301 is divided into two sections, front and rear, and the middle part is sealed and connected together by a sleeve joint 320, so that the front and rear sections can be relatively telescopic. An annular spring seat 317 is fixed on the inner wall of the middle part of the shell 311, and a spring 319 is set between the inner end wall 318 of the front and rear sections of the core tube 301 and the spring seat 317. Thus, the front and rear sections of the core tube 301 can be independently telescopic, moved and reset relative to the spring seat 317. The front and rear sections of the core tube 301 can be rotated independently or in conjunction. When the joint rotation is required, a guide hole 321 is provided on the outer tube side wall of the sealing cover 302, and a guide rod 322 is fixed at the end of the inner tube, and the guide rod 322 is set in the corresponding guide hole 321. Thus, when the heat sink 3 moves straightly at high speed, the air guide cone ring 310 located on the front windward surface will be subject to air flow resistance, thereby shrinking moderately backward. After the contraction, the space between the two inner end walls 318 becomes smaller, thereby reducing the total capacity of the circulation chamber 315, so that the fluid heat-conducting medium in the circulation chamber 315 surges upward and fills the entire circulation chamber 315, otherwise the fluid heat-conducting medium in the circulation chamber 315 cannot cover the top. Based on this structure, when the heat sink 3 moves at a high speed, the efficiency of heat conduction from bottom to top can be improved, and when the heat sink 3 stops moving, the heat conduction efficiency from top to bottom is reduced because the fluid heat-conducting medium does not fill the circulation chamber 315.

[0048] The above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modification, equivalent substitution, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-precision CNC machine tool linear motor direct-drive heat dissipation device, installed between a base (1) and a motor mover (6), comprising a heat dissipation plate (3), the heat dissipation plate (3) being fixed to the upper side of the motor mover (6), characterized in that: The heat sink (3) comprises an outer shell (311) and a plurality of air flow units. A series of circular hole sleeves are arranged in parallel on the front and rear end surfaces of the rectangular outer shell (311). An annular shaft sleeve positioning frame (312) is fixed to the inner wall of each pair of circular hole sleeves of the outer shell (311). The air flow units comprise a core tube (301). Sealing covers (302) are fixed at both ends of the core tube (301). The sealing covers (302) are matched and sleeved in the circular hole sleeves at the ports of the outer shell (311). A rotating sleeve ring groove (303) and a magnetic ring groove (304) are arranged at both ends of the core tube (301). The rotating sleeve ring groove (303) is sleeved in the corresponding shaft sleeve positioning frame (312). Thus, the core tube (301) of each air flow unit can rotate independently of each other. The invention relates to a method for manufacturing a magnetic ring system for a mobile device. The magnetic ring groove (304) is provided with an inherent magnetic ring body (309). A sealed outer tube (305) is sealed and fixed in the middle section of the core tube (301). The area between the sealed outer tube (305) and the side wall of the core tube (301) is surrounded by a sealed annular sealed cavity (314). The annular sealed cavity (314) is sealed and filled with a phase change material. The center of the core tube (301) is an air passage (316). The area between the outer shell (311) and the core tube (301) is surrounded by a sealed circulation cavity (315). The circulation cavity (315) is filled with a fluid heat-conducting medium. Reversing magnets (7) with the same magnetic direction are respectively installed on the inner sides of two parallel linear guide rails (10). The magnetic directions of adjacent reversing magnets (7) are opposite.

2. The high-precision CNC machine tool linear motor direct-drive heat dissipation device according to claim 1, characterized in that: A series of heat conducting plates (306) are arranged on the side wall of the core tube (301), and the heat conducting plates (306) are located in both the annular sealing cavity (314) and the gas passage (316).

3. The high-precision CNC machine tool linear motor direct-drive heat dissipation device according to claim 1, characterized in that: A wear-resistant sleeve (307) is sleeved between the shaft sleeve positioning frame (312) and the rotating sleeve ring groove (303), and a sealing ring (308) is also installed.

4. The high-precision CNC machine tool linear motor direct-drive heat dissipation device according to claim 1, characterized in that: An air guide cone ring (310) is mounted inside the sealing housing (302).

5. The high-precision CNC machine tool linear motor direct-drive heat dissipation device according to claim 1, characterized in that: It also includes a workbench (5), the linear guide rails (10) are fixed on both sides of the upper part of the workbench (5), the linear guide rails (10) on both sides are respectively matched with guide rail sliders (8), the lower part of the periphery of the base (1) is respectively fixed to the upper part of each guide rail slider (8), a motor stator (4) is fixed on the upper side of the middle part of the workbench (5), and the motor mover (6) is fixed between the guide rail sliders (8) on both sides.

6. The high-precision CNC machine tool linear motor direct-drive heat dissipation device according to claim 5, characterized in that: An inner cavity is provided in the guide rail slider (8), and a heat conduction pipe (9) is led out from an interface (92) on the side wall of the circulation cavity (315) and connected to the inner cavities of the front and rear guide rail sliders (8).

7. The high-precision CNC machine tool linear motor direct-drive heat dissipation device according to claim 6, characterized in that: When the left and right sides of the motor mover (6) each have two guide rail sliders (8), the inner cavities of the two guide rail sliders (8) on each side are connected via a connecting pipe (91), and at this time, heat conduction pipes (9) are respectively led out from the front and rear interfaces (92) on the side wall of the circulation chamber (315), and the front and rear heat conduction pipes (9) are respectively connected to the inner cavities of the front and rear guide rail sliders (8), and the front and rear guide rail sliders (8) are connected via the connecting pipe (91).

8. The high-precision CNC machine tool linear motor direct-drive heat dissipation device according to claim 1, characterized in that: A heat insulation board (2) is fixed on the upper surface of the heat dissipation board (3), and the heat insulation board (2) is fixed below the base (1).

9. The high-precision CNC machine tool linear motor direct-drive heat dissipation device according to claim 1, characterized in that: The core tube (301) is divided into two sections, front and rear sections, which are sealed and connected together in the middle through a sleeve joint (320), so that the front and rear sections can be relatively telescopic. An annular spring seat (317) is fixed to the inner wall of the middle of the outer shell (311), and a spring (319) is sleeved between the inner end walls (318) of the front and rear sections of the core tube (301) and the spring seat (317).

10. The high-precision CNC machine tool linear motor direct-drive heat dissipation device according to claim 9, characterized in that: The front and rear core tubes (301) can rotate independently or in conjunction with each other. When the core tubes (301) need to rotate in conjunction with each other, a guide hole (321) is provided on the side wall of the outer tube of the sealing cover (302), and a guide rod (322) is fixed to the end of the inner tube. The guide rod (322) is sleeved into the corresponding guide hole (321).

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