Motor stator heating device, trickle varnish system and trickle varnish curing method

Abstract

The invention relates to the technical field of motor stator insulation treatment, and discloses a motor stator heating device, a trickle paint system and a trickle paint curing method, which can improve the curing efficiency of motor stator trickle paint and the quality of a paint film at the same time. Wherein the motor stator comprises a stator iron core and a stator winding wound on the stator iron core, and the middle part of the stator iron core is provided with a cavity. The motor stator heating device comprises a rack used for fixing a motor stator; the electric heating mechanism is arranged on the rack; the electric heating mechanism is used for being connected with the output end of the stator winding so as to heat the stator winding; the induction heating mechanism is arranged on the rack; the induction heating mechanism comprises an induction coil, and the induction coil is used for penetrating into the cavity so as to heat the stator core.

Description

Technical Field

[0001] The present invention relates to the technical field of motor stator insulation treatment, and in particular to a motor stator heating device, a paint dripping system and a paint dripping curing method. Background Art

[0002] In motor manufacturing, the stator paint dripping process is the core link to improve the insulation performance, mechanical strength and heat dissipation efficiency of the winding. Traditional paint liquid solidification relies on an external heat source. Current industrial production mainly adopts three technical routes: hot air heating, resistance heating and electromagnetic induction heating, but all of them have significant limitations: hot air heating relies on oven solidification, and heat is conducted from the outside to the inside, which causes the outer layer of paint liquid to solidify prematurely, hindering the penetration of the internal paint liquid. Not only is the curing efficiency low, but it is also easy to form bubbles or voids, resulting in poor paint film quality; although resistance heating heats up quickly and has a high curing efficiency, it heats unevenly and easily causes local overheating, affecting the film quality of the paint film; although electromagnetic induction heating heats up quickly locally and has a high curing efficiency, it has poor penetration into non-metallic materials (such as paint liquid), making it difficult to ensure the effective penetration of the paint liquid, and thus it is difficult to ensure the film quality of the paint film. Therefore, the existing technology is difficult to take into account both the improvement of the curing efficiency and the quality of the paint film of the motor stator dripping paint. Summary of the Invention

[0003] One of the purposes of the present invention is to provide a motor stator heating device to solve the problem that the existing technology is difficult to improve the curing efficiency and paint film quality of the motor stator paint; the second purpose is to provide a motor stator paint dripping system; the third purpose is to provide a motor stator paint dripping curing method.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A motor stator heating device, the motor stator includes a stator core and a stator winding wound on the stator core, a cavity is provided in the middle of the stator core, and the heating device includes: a frame for fixing the motor stator; an electric heating mechanism, arranged on the frame; the electric heating mechanism is used to be connected to the output end of the stator winding to heat the stator winding; an induction heating mechanism, arranged on the frame; the induction heating mechanism includes an induction coil, and the induction coil is used to be inserted into the cavity to heat the stator core.

[0006] According to the above technical means, through the synergistic effect of the electric heating mechanism and the induction heating mechanism, combined with the direct conduction characteristics of resistance heating and the rapid heating advantages of induction heating, it not only ensures the uniform heating requirements during the paint liquid penetration stage, but also improves the curing efficiency. At the same time, it avoids the problem of uneven temperature distribution caused by a single heating method, and significantly improves the film formation quality of the paint film.

[0007] Furthermore, the electric heating mechanism includes a heating element and a clamping member; the heating element is arranged on the frame, and the clamping member is used to clamp and fix the heating element to the output end of the stator winding.

[0008] Based on the above technical means, the clamping design ensures stable contact between the heating element and the output end of the stator winding, reduces contact resistance, avoids the risk of local overheating, improves the energy transfer efficiency of electric heating, and further ensures heating uniformity.

[0009] Furthermore, the induction heating mechanism includes a telescopic member, the induction coil is wound around the driving end of the telescopic member, and the telescopic member is used to drive the induction coil to move along the axial direction of the stator core.

[0010] According to the above technical means, the induction coil moves axially through the telescopic part, and the position of the heating area can be dynamically adjusted to adapt to the heating requirements of stator cores of different lengths, eliminate the solidification differences caused by the axial temperature gradient of the core, and improve the heating uniformity.

[0011] Furthermore, the driving end of the telescopic member includes a plurality of support parts sequentially arranged along the telescopic direction, and adjacent support parts are detachably connected; a plurality of groups of induction coils are provided, and the plurality of groups of induction coils are respectively wound on the plurality of support parts.

[0012] Based on the above technical means, the modular support part and multiple sets of induction coils are designed to make the heating mechanism compatible with motor stators of different sizes, and reduce the radial temperature difference of the iron core through distributed heating, enhance the penetration consistency of the paint liquid, and improve the paint film quality and process adaptability.

[0013] Furthermore, the heating device also includes a temperature measuring unit for monitoring the temperature of the motor stator in real time; a control unit connected to the electric heating mechanism, the induction heating mechanism, and the temperature measuring unit; the control unit is used to receive temperature information from the temperature measuring unit and adjust the power of the electric heating mechanism and / or the induction heating mechanism according to the temperature information.

[0014] Based on the above technical means, real-time temperature measurement and closed-loop control realize dynamic adjustment of heating power, accurately matching the temperature requirements of each stage of paint liquid curing, avoiding overheating or underheating, and significantly improving curing efficiency and paint film performance stability.

[0015] Furthermore, it also includes an alarm unit, which is connected to the control unit; when the temperature obtained by the temperature measuring unit exceeds a threshold, the control unit is suitable for controlling the alarm unit to sound an alarm and shut down the electric heating mechanism and / or the induction heating mechanism.

[0016] Based on the above technical means, the over-temperature alarm and automatic power-off functions dually guarantee the safety of the heating process, prevent thermal damage to the insulation layer or equipment failure caused by temperature out of control, and improve process reliability.

[0017] Furthermore, it also includes a cooling mechanism, which is arranged on the frame and located at one axial end of the cavity.

[0018] According to the above technical means, the integration of the cooling mechanism accelerates the cooling rate of the stator after curing, shortens the process cycle, and avoids local stress concentration caused by natural cooling, thereby improving production efficiency and paint film density.

[0019] A motor stator paint dripping system comprises: the motor stator heating device mentioned above; and a paint dripping device for dripping paint on the motor stator.

[0020] A method for curing paint dripping on a motor stator uses the above-mentioned motor stator heating device, comprising the following steps: a permeation stage: turning on an electric heating mechanism and controlling the electric heating mechanism to heat the motor stator to a first preset temperature; a preliminary curing stage: turning off the electric heating mechanism and turning on an induction heating mechanism and controlling the induction heating mechanism to heat the motor stator to a second preset temperature so that a gel layer forms on the surface of the paint liquid on the motor stator; a deep curing stage: turning on the electric heating mechanism and controlling the electric heating mechanism and the induction heating mechanism to heat the motor stator to a third preset temperature and maintaining the temperature constant for a predetermined time.

[0021] According to the above technical means, the phased heating strategy coordinates the timing of electric heating and induction heating, uses uniform heating to reduce the viscosity of the paint liquid in the penetration stage, uses induction heating to quickly form a film in the initial curing stage, and uses collaborative heating to improve the cross-linking density in the deep curing stage, taking into account both efficiency and quality.

[0022] Furthermore, the electric heating mechanism includes a heating element and a clamping member; the heating element is arranged on the frame, and the clamping member is used to clamp the heating element and the output end of the stator winding; during the penetration stage and the deep curing stage, the heating element is used to heat the motor stator.

[0023] According to the above technical means, the clamping parts ensure stable thermal contact between the heating element and the output end of the stator winding through mechanical clamping, effectively reducing contact resistance and thermal resistance, avoiding local overheating or energy loss caused by poor contact, and at the same time providing uniform basic heating during the penetration stage to maintain the low viscosity of the paint liquid. During the deep curing stage, continuous thermal conduction compensates for the axial temperature difference of induction heating, doubly ensuring the uniformity of paint film curing and process stability.

[0024] Furthermore, the induction heating mechanism includes a telescopic part, the induction coil is wound around the driving end of the telescopic part, and the telescopic part is used to drive the induction coil to move axially along the stator core; in the initial curing stage and the deep curing stage, the telescopic part is used to adjust the heating position of the induction coil.

[0025] According to the above technical means, in the initial curing and deep curing stages, the axial position of the induction coil is dynamically adjusted through the telescopic parts, and the heating area distribution can be optimized according to the heat requirements of different curing stages. For example, in the initial curing stage, the end is concentratedly heated to accelerate the formation of the gel layer, and in the deep curing stage, the entire axial direction is evenly covered to increase the cross-linking density, thereby strengthening the matching of the paint film curing quality and heating efficiency in stages.

[0026] Furthermore, the driving end of the telescopic part includes a plurality of support parts arranged in sequence along the telescopic direction, and adjacent support parts are detachably connected; multiple groups of induction coils are provided, and the multiple groups of induction coils are respectively wound on multiple support parts; before the infiltration stage, the number of support parts and induction coils is adjusted according to the size of the stator core.

[0027] Based on the above technical means, the modular support part and the adjustable number of induction coils are designed, so that the heating mechanism can flexibly adapt to stator cores with different axial lengths and slot types, avoiding paint film defects caused by overheating or insufficient heating, while reducing equipment redundancy and improving process compatibility and resource utilization.

[0028] Furthermore, the method further includes the steps of: monitoring the temperature of the motor stator in real time, and adjusting the power of the electric heating mechanism and / or the induction heating mechanism according to the temperature information.

[0029] Based on the above-mentioned technical means, real-time temperature monitoring and power regulation form a closed-loop control, which can accurately compensate for heat loss or local overheating during the paint liquid curing process. For example, a constant low temperature is maintained during the infiltration stage to ensure the fluidity of the paint liquid, and the temperature is gradually increased during the curing stage to control shrinkage stress, thereby significantly improving the density of the paint film and process repeatability.

[0030] Furthermore, the method further includes the following steps: when the temperature of the motor stator exceeds a threshold value, controlling the alarm unit to sound an alarm and controlling the electric heating mechanism and / or the induction heating mechanism to shut down.

[0031] Based on the above technical means, the over-temperature threshold alarm and automatic power-off function form a dual protection mechanism, which can not only prevent paint film carbonization or insulation failure caused by thermal runaway, but also reduce equipment loss through timely intervention, extend the service life of the heating mechanism, and reduce the rework costs caused by quality accidents.

[0032] Furthermore, the method further includes the following steps: a cooling stage: turning off the electric heating mechanism and the induction heating mechanism, and turning on the cooling mechanism, and controlling the cooling mechanism to cool the motor stator to room temperature.

[0033] According to the above technical means, forced cooling is implemented through the cooling mechanism during the cooling stage to accelerate the cooling of the stator, which can shorten the process cycle and reduce residual thermal stress. For example, micro cracks in the paint film caused by natural cooling can be avoided. At the same time, temperature-stable workpieces are provided for the next process, thereby improving the overall beat of the production line and the product qualification rate.

[0034] Beneficial effects of the present invention:

[0035] Through the synergistic effect of the electric heating mechanism and the induction heating mechanism, combined with the direct conduction characteristics of resistance heating and the rapid heating advantage of induction heating, it not only ensures the uniform heating requirements during the paint liquid penetration stage, but also improves the curing efficiency. At the same time, it avoids the uneven temperature distribution problem caused by a single heating method and significantly improves the film formation quality of the paint film. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic diagram of the structure of the motor stator heating device of the present invention;

[0037] Figure 2 This is a control schematic diagram of the motor stator heating device of the present invention;

[0038] Figure 3 The present invention is a process flow chart of the motor stator paint curing method.

[0039] Among them, the labels are: 1-motor stator; 10-cavity; 11-stator core; 12-stator winding; 13-power transmission component; 2-frame; 21-first bracket; 22-second bracket; 3-electric heating mechanism; 31-heating element; 32-clamping member; 4-induction heating mechanism; 41-telescopic member; 411-support part; 42-induction coil; 5-temperature measuring unit; 51-temperature sensor; 6-control unit; 61-first lead; 62-third lead; 63-fourth lead; 7-paint dripping device. DETAILED DESCRIPTION

[0040] The following describes the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will readily appreciate the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the various details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are intended only to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0041] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0042] This embodiment proposes a motor stator heating device, such as Figure 1As shown, the motor stator 1 includes a stator core 11 and a stator winding 12 wound around the stator core 11. A cavity 10 is defined in the center of the stator core 11. It is understood that the present invention does not impose any specific restrictions on the type of motor stator 1, winding form, etc., as long as the heating device of the present invention can achieve the paint curing function.

[0043] Specifically, the heating device includes a frame 2 and an electric heating mechanism 3 and an induction heating mechanism 4 provided on the frame 2 .

[0044] The frame 2 is the basic framework of the entire heating device, used to fix the motor stator 1 and provide support for the electric heating mechanism 3 and the induction heating mechanism 4. The specific shape and material of the frame 2 can be adjusted according to the shape, size, and weight of the motor stator 1 to ensure the stability and safety of the motor stator 1 during the heating process.

[0045] For example, Figure 1 As shown, the frame 2 includes a base plate and a first bracket 21 and a second bracket 22 arranged on the base plate. The first bracket 21 includes a cylindrical portion and a cover portion that can be detachably mounted on both axial ends of the cylindrical portion. The cylindrical portion and the two cover portions together form an axially through-going mounting cavity, and the cylindrical portion and the two cover portions are used to clamp the motor stator 1 in the mounting cavity. It can be understood that the cross-sectional shapes of the cylindrical portion and the cover portion are both annular, and the annular inner diameter of the cover portion is smaller than the outer diameter of the stator core 11, and the annular inner diameter of the cylindrical portion is larger than the outer diameter of the stator core 11. The second bracket 22 can be plate-shaped, columnar, etc., and the above-mentioned electric heating mechanism 3 and induction heating mechanism 4 can be mounted on the second bracket 22. Specifically, the second bracket 22 can be located at one axial end of the first bracket 21 to facilitate heating of the motor stator 1.

[0046] For example, a small-power motor stator 1 may use a plastic or aluminum alloy frame 2, while a large-scale industrial motor stator 1 may use a thicker steel material.

[0047] The electric heating mechanism 3 is connected to the output end of the stator winding 12 to heat the stator winding 12. Specifically, the output end of the stator winding 12 is provided with a power transmission element 13, which is used to connect the power to the motor stator 1. The electric heating mechanism 3 can be connected to the power transmission element 13 to heat the stator winding 12 via the power transmission element 13. The type of power transmission element 13 depends on the type of the motor stator 1. For example, if the motor stator 1 is the stator of a three-phase asynchronous motor, the power transmission element 13 can be a three-phase copper busbar. More specifically, the electric heating mechanism 3 can directly generate resistive heat and transfer the heat to the stator winding 12 through the power transmission element 13, and then to the stator core 11, thereby heating the entire motor stator 1. The electric heating mechanism 3 can also transmit current to the stator winding 12 through the power transmission element 13, causing the stator winding 12 to generate resistive heat, which is then transferred to the stator core 11, thereby heating the entire motor stator 1.

[0048] The induction heating mechanism 4 includes an induction coil 42, which is inserted into the cavity 10 to inductively heat the stator core 11. Specifically, the induction coil 42 generates eddy currents through electromagnetic induction, rapidly heating the stator core 11 and transferring the heat to the stator winding 12. Induction heating offers the advantages of rapid heating and high efficiency, making it particularly suitable for the curing process of liquid paint.

[0049] In this embodiment, through the synergistic effect of the electric heating mechanism 3 and the induction heating mechanism 4, combined with the direct conduction characteristics of resistance heating and the rapid heating advantage of induction heating, the uniform heating requirements in the paint liquid penetration stage are guaranteed, and the curing efficiency is improved. At the same time, the problem of uneven temperature distribution caused by a single heating method is avoided, and the film formation quality of the paint film is significantly improved.

[0050] Furthermore, in some embodiments, Figure 1 As shown, the electric heating mechanism 3 includes a heating element 31 and a clamping member 32. The heating element 31 is mounted on the frame 2. The clamping member 32 is used to clamp the heating element 31 to the output end of the stator winding 12, specifically to the power transmission member 13. In this embodiment, the design of the clamping member 32 ensures stable contact between the heating element 31 and the output end of the stator winding 12, reducing contact resistance, avoiding the risk of local overheating, improving the energy transfer efficiency of the electric heating, and further ensuring heating uniformity.

[0051] Exemplarily, the heating element 31 may include a clamping portion and a heating portion provided on the clamping portion, and the clamping portion may be mounted on the above-mentioned second bracket 22, and the heating portion is mounted on the clamping portion. Exemplarily, the heating portion may be an electric heating wire, an electric heating plate, a three-phase copper busbar, etc., which can generate heat through electric current and conduct it to the power transmission component 13, and then conduct it to the entire motor stator 1. Exemplarily, the clamping member 32 may be a bolt, a nut, a snap, etc., as long as it can achieve the function of clamping and fixing the heating element 31 and the power transmission component 13. It can be understood that the clamping force of the clamping member 32 needs to be large enough to ensure good contact between the heating element 31 and the power transmission component 13; the design of the heating element 31 needs to ensure uniform heating to avoid local overheating or uneven heating.

[0052] For example, the heating element 31 and the power transmission member 13 are both plate-like structures (such as electric heating plates or three-phase copper busbars), and the clamping member 32 is a bolt and nut. The bolt passes through the connection holes of the heating element 31 and the power transmission member 13 and is tightened with the nut to achieve surface-to-surface contact between the heating element 31 and the power transmission member 13 to ensure good contact between the two. It can be understood that in this embodiment, the heating power of the electric heating mechanism 3 can be adaptively adjusted according to the temperature requirements during the curing process to achieve precise heating of the motor stator 1.

[0053] Furthermore, in some embodiments, the induction heating mechanism 4 includes a telescopic member 41, with an induction coil 42 wound around the driving end of the telescopic member 41. The telescopic member 41 is used to drive the induction coil 42 to move axially along the stator core 11. For example, the telescopic member 41 can be an electric telescopic rod, a cylinder, hydraulic steel, etc. In this embodiment, the induction coil 42 can be axially moved by the telescopic member 41, and the position of the heating area can be dynamically adjusted to meet the heating requirements of stator cores 11 of different lengths, eliminating the curing differences caused by the axial temperature gradient of the core, and improving heating uniformity.

[0054] Furthermore, in some embodiments, the driving end of the telescopic member 41 includes a plurality of support portions 411 arranged in sequence along the telescopic direction, and adjacent support portions 411 are detachably connected. Multiple groups of induction coils 42 are provided, and the multiple groups of induction coils 42 are respectively wound on the multiple support portions 411. For example, adjacent support portions 411 can be threadedly connected, snap-fitted, etc. In this embodiment, the modular support portion 411 and the multiple groups of induction coils 42 are designed to make the heating mechanism compatible with motor stators 1 of different sizes, and reduce the radial temperature difference of the iron core through distributed heating, enhance the penetration consistency of the paint liquid, and improve the paint film quality and process adaptability.

[0055] For example, the induction coil 42 can be made of a highly permeable material to improve electromagnetic induction efficiency, thereby increasing energy efficiency while reducing energy consumption. For example, the induction coil 42 can be an adjustable induction coil 42 array, where the spacing of the coil array can be adjusted based on the inner diameter of the motor stator 1 to ensure uniform and accurate heating. Power Regulation: The induction heating control device can dynamically adjust the heating power by adjusting the coil current and frequency.

[0056] Furthermore, in some embodiments, Figure 1 As shown, the heating device further includes a control unit 6, which is connected to the electric heating mechanism 3 and the induction heating mechanism 4 to independently control the opening and closing of the electric heating mechanism 3 and the induction heating mechanism 4 and adjust the power.

[0057] Specifically, the control unit 6 is connected to the heating unit of the electric heating mechanism 3 via the first lead 61 to control the on / off switching of the electric heating mechanism 3 and adjust the heating power of the electric heating mechanism 3. The control unit 6 can adjust the on / off switching of the electric heating mechanism 3 by adjusting the on / off switching of the current input via the first lead 61, and can adjust the heating power of the electric heating mechanism 3 by adjusting the magnitude of the current input via the first lead 61.

[0058] Specifically, the control unit 6 is connected to the induction coil 42 of the induction heating mechanism 4 via a second lead (not shown in the figure) to control the on / off state of the induction heating mechanism 4 and the heating power of the induction coil 42. The control unit 6 can adjust the on / off state of the current input via the second lead to adjust the on / off state of the induction heating mechanism 4, and can adjust the heating power of the induction heating mechanism 4 by adjusting the current and frequency input via the second lead.

[0059] Specifically, the control unit 6 is connected to the telescopic member 41 via the third lead 62, and controls the heating position of the induction coil 42 within the cavity 10 via the telescopic member 41. Specifically, the control unit 6 adjusts the heating position of the induction coil 42 within the cavity 10 by controlling the extension length of the driving end of the telescopic member 41.

[0060] Furthermore, in some embodiments, the heating device further includes a temperature measuring unit 5, which is used to monitor the temperature of the motor stator 1 in real time. The control unit 6 is connected to the temperature measuring unit 5 and is used to receive temperature information from the temperature measuring unit 5 and adjust the power of the electric heating mechanism 3 and / or the induction heating mechanism 4 based on the temperature information. In this embodiment, real-time temperature measurement and closed-loop control enable dynamic adjustment of the heating power, accurately matching the temperature requirements of each stage of paint curing, avoiding overheating or underheating, and significantly improving curing efficiency and paint film performance stability.

[0061] Exemplarily, the temperature measurement unit 5 may include a plurality of temperature sensors 51, and the plurality of temperature sensors 51 may be respectively arranged on the inner wall, outer wall and stator winding 12 of the stator core 11 to realize multi-point temperature measurement of the stator core 11 and the stator winding 12, so as to monitor the temperature distribution of the motor stator 1 in real time, and facilitate the control of the heating power, opening and closing status, etc. of the electric heating mechanism 3 and the induction heating mechanism 4 according to the temperature distribution. Specifically, the temperature sensor 51 may be an optical fiber temperature sensor 51, a thermocouple sensor, etc., to provide high-precision temperature measurement values. The temperature sensor 51 may be fixed to the stator core 11 or the stator winding 12 by bonding or the like. Exemplarily, as Figure 1 As shown, the temperature measuring unit 5 is connected to the control unit 6 via the fourth lead 63. The temperature information measured by the temperature sensor 51 can be transmitted to the control unit 6 via the fourth lead 63. The control unit 6 collects and analyzes the temperature information to ensure the temperature control accuracy of the heating process.

[0062] Furthermore, the temperature measurement accuracy of the temperature sensor 51 can be up to ±0.5°C to ensure the accuracy of temperature control; its temperature measurement range can be 40°C-120°C; its layout can adopt multi-point distribution, that is, multiple temperature sensors 51 are respectively arranged at different positions of the inner wall, outer wall and stator winding 12 of the stator core 11 to ensure the comprehensiveness of the temperature data.

[0063] Furthermore, when the temperature difference detected by any two temperature sensors 51 is greater than a certain temperature (such as 5°C), the control unit 6 can achieve joint temperature control by adjusting the power of the electric heating mechanism 3 and the induction heating mechanism 4, or adjusting the heating position of the induction coil 42, so as to facilitate the gradient curing of the paint liquid and ensure the quality of the paint film.

[0064] Furthermore, in some embodiments, the heating device further includes an alarm unit connected to the control unit 6. When the temperature measured by the temperature measuring unit 5 exceeds a threshold, the control unit 6 is adapted to control the alarm unit to sound an alarm and shut down the electric heating mechanism 3 and / or the induction heating mechanism 4. In this embodiment, the over-temperature alarm and automatic power-off functions provide dual assurance of heating process safety, preventing thermal damage to the insulation layer or equipment failure due to temperature runaway, thereby improving process reliability.

[0065] Specifically, if Figure 2As shown, the control unit 6 includes an information processing module, a timing control module, and a power regulation module. The information processing module is connected to the temperature measuring unit 5 and is used to receive the temperature information of each temperature measuring point monitored in real time by the temperature measuring unit 5, and analyze the temperature information, including whether the temperature threshold is reached, whether the predetermined temperature of each curing stage is reached, whether the temperature difference between any two temperature measuring points exceeds a certain temperature, etc. The power regulation module is connected to the information processing module and is used to dynamically adjust the heating power of the electric heating mechanism 3 and the induction heating mechanism 4 according to the received temperature information. The timing control module is connected to the information processing module and is used to switch the electric heating mechanism 3 and the induction heating mechanism 4 on and off according to the heating temperature and the curing stage to ensure the coordination and rationality of the heating process.

[0066] For example, the control unit 6 may further include a display module connected to the information processing module for displaying the temperature information received by the information processing module. Furthermore, the display module may be connected to the power regulation module for displaying power parameters of the electric heating mechanism 3 and the induction heating mechanism 4.

[0067] Furthermore, in some embodiments, a cooling mechanism is also included, which is provided on the frame 2 and is located at one axial end of the cavity 10. Exemplarily, the cooling mechanism can be a fan, a refrigerator, etc. Exemplarily, cooling mechanisms can be provided at both axial ends of the cavity 10. Exemplarily, the cooling mechanism can be installed on the frame 2, specifically on the bottom plate of the frame 2. In this embodiment, the cooling mechanism is integrated to accelerate the cooling rate of the stator after curing, shorten the process cycle, and avoid local stress concentration caused by natural cooling, thereby improving production efficiency and paint film density.

[0068] It can be understood that the motor stator heating device of the present invention includes but is not limited to a paint dripping curing process, a paint dipping curing process, etc. applied to the motor stator 1, as long as there is a heating curing requirement.

[0069] This embodiment proposes a motor stator paint dripping system, such as Figure 1 As shown, the motor stator heating device and the paint dripping device 7 are included. The paint dripping device 7 is used to drip paint onto the motor stator 1. The present invention does not limit the specific structure of the paint dripping device 7. It can be any paint dripping device commonly used in the prior art, as long as it can achieve the paint dripping function of the motor stator 1. For example, the paint dripping device 7 can be installed on the frame 2, for example, it can be installed on the bottom plate of the frame 2, and the second bracket 22 and the paint dripping device 7 can be located on both sides of the first bracket 21.

[0070] As will be appreciated, the paint dispensing device 7 of the present invention includes the motor stator heating device of the present invention, and thus has the same technical effects as the heating device of the present invention, which will not be further elaborated here. Furthermore, the integrated design of the heating device and paint dispensing device 7 achieves a seamless transition between the paint dispensing and curing processes, reducing the impact of temperature fluctuations between process steps on paint film quality and improving the overall efficiency of the system.

[0071] This embodiment proposes a method for curing paint dripping on a motor stator, using the above-mentioned motor stator heating device, specifically, as follows: Figure 3 As shown, the drip paint curing method includes the steps of:

[0072] S10: Infiltration stage: The electric heating mechanism 3 is turned on and controlled to heat the motor stator 1 to a first preset temperature. In this step, the electric heating mechanism 3 is used to uniformly preheat the entire motor stator 1, reduce the viscosity of the paint liquid, and promote its flow into the deep part of the winding.

[0073] The first preset temperature can be 40-60°C, at which point the viscosity of the paint liquid can be reduced to below 100 mPa·s. Furthermore, the penetration effect during the penetration stage can be further improved by controlling the heating time and the holding time. The heating time can be 20-40 minutes, and the holding time can be 5-20 minutes. For example, this step can specifically include turning on the electric heating mechanism 3, controlling the electric heating mechanism 3 to heat the motor stator 1 to 50°C within 30 minutes, and holding the temperature for 10 minutes.

[0074] S20: Preliminary Curing Stage: Electric heating mechanism 3 is turned off, and induction heating mechanism 4 is turned on. Induction heating mechanism 4 is controlled to heat motor stator 1 to a second preset temperature, thereby forming a gel layer on the surface of the paint liquid on motor stator 1. In this step, induction heating mechanism 4 can instantly heat motor stator 1 to the second preset temperature, triggering the gelation of the paint liquid.

[0075] The second preset temperature can be 80-100°C. Furthermore, the gelling effect and curing efficiency can be further improved by controlling the heating time, which can be 2-10 minutes. For example, this step can specifically include turning off the electric heating mechanism 3 and turning on the induction heating mechanism 4, controlling the induction heating mechanism to heat the motor stator 1 to 90°C within 5 minutes, so that a gel layer forms on the paint surface of the motor stator 1.

[0076] S30: Deep Curing Stage: Electric heating mechanism 3 is activated, and controls both electric heating mechanism 3 and induction heating mechanism 4 to heat motor stator 1 to a third preset temperature and maintain this temperature for a predetermined period of time. In this step, electric heating mechanism 3 and induction heating mechanism 4 operate synchronously, rapidly heating motor stator 1 and improving curing efficiency.

[0077] The third preset temperature may be 100-120° C., and the predetermined time may be 30-50 minutes. For example, the steps may specifically include: turning on the electric heating mechanism 3 , controlling the electric heating mechanism 3 and the induction heating mechanism 4 to heat the motor stator 1 to 110° C., and maintaining the temperature for 40 minutes.

[0078] Utilizing the above-mentioned curing method, the staged heating strategy coordinates the timing of electric heating and induction heating, uniformly heating the paint to reduce the viscosity of the paint liquid during the penetration stage, rapidly forming a film by induction heating during the initial curing stage, and collaborative heating during the deep curing stage to increase the crosslinking density, taking into account both efficiency and quality. Experimental verification shows that the motor stator 1 obtained by the paint dripping curing method of the present invention has a 35% increase in paint penetration depth, a 28% reduction in curing time, and no bubbles or cracks, compared to the traditional method. It can be seen that the paint dripping curing method of the present invention can effectively improve the paint film quality and curing efficiency, ensuring the insulation performance of the stator.

[0079] Furthermore, in some embodiments, a pretreatment stage is included before step S10: the stator winding 12 is dipped in paint or dripped with paint. Specifically, the stator winding 12 can be dripped with paint using the aforementioned paint dripping device 7. Alternatively, the stator winding 12 can be vacuum pressure dipped with paint. The present invention does not specifically limit the type of paint liquid, as long as it can improve mechanical and insulation properties. For example, the paint liquid can be epoxy resin, polyurethane insulating paint, etc.

[0080] Furthermore, in some embodiments, after step S30, the process further includes the following steps:

[0081] S40: Cooling Phase: The electric heating mechanism 3 and the induction heating mechanism 4 are turned off, and the cooling mechanism is turned on and controlled to cool the motor stator 1 to room temperature. In this embodiment, the cooling phase uses the cooling mechanism to force cooling, accelerating the stator's temperature drop. This can shorten the process cycle and reduce residual thermal stress, such as avoiding micro-cracking in the paint film caused by natural cooling. This also provides workpieces with a stable temperature for the next process, improving the overall production line cycle time and product qualification rate.

[0082] Furthermore, in some embodiments, the electric heating mechanism 3 includes a heating element 31 and a clamping member 32; the heating element 31 is provided on the frame 2, and the clamping member 32 is used to clamp the heating element 31 to the output end of the stator winding 12. During the penetration stage and the deep curing stage, the heating element 31 is used to heat the motor stator 1. In this embodiment, the clamping member 32 ensures that the heating element 31 forms a stable thermal contact with the output end of the stator winding 12 through mechanical clamping, effectively reducing the contact resistance and thermal resistance, avoiding local overheating or energy loss caused by poor contact, and at the same time providing uniform basic heating in the penetration stage to maintain the low viscosity state of the paint liquid, and compensating the axial temperature difference of the induction heating through continuous thermal conduction in the deep curing stage, doubly ensuring the uniformity of the paint film curing and the process stability.

[0083] Furthermore, in some embodiments, the induction heating mechanism 4 includes a telescopic member 41, and an induction coil 42 is wound around the driving end of the telescopic member 41. The telescopic member 41 is used to drive the induction coil 42 to move axially along the stator core 11; during the initial curing stage and the deep curing stage, the telescopic member 41 is used to adjust the heating position of the induction coil 42. In this embodiment, during the initial curing and deep curing stages, the axial position of the induction coil 42 is dynamically adjusted by the telescopic member 41, and the distribution of the heating area can be optimized according to the thermal requirements of different curing stages. For example, in the initial curing stage, the end portion is concentratedly heated to accelerate the formation of the gel layer, and in the deep curing stage, the entire axial direction is evenly covered to increase the cross-linking density, thereby strengthening the matching of the paint film curing quality and the heating efficiency in stages.

[0084] Furthermore, in some embodiments, the driving end of the telescopic member 41 includes multiple support portions 411 arranged sequentially along the telescopic direction, with adjacent support portions 411 being detachably connected. Multiple sets of induction coils 42 are provided, each wound around the multiple support portions 411. Prior to the infiltration stage, the number of support portions 411 and induction coils 42 is adjusted based on the size of the stator core 11. In this embodiment, the modular design with adjustable number of support portions 411 and induction coils 42 allows the heating mechanism to flexibly adapt to stator cores 11 of varying axial lengths and slot shapes, avoiding paint film defects caused by overheating or underheating. This also reduces equipment redundancy and improves process compatibility and resource utilization.

[0085] Furthermore, in some embodiments, the step of monitoring the temperature of the motor stator 1 in real time and adjusting the power of the electric heating mechanism 3 and / or the induction heating mechanism 4 according to the temperature information is also included. It is understandable that this step can be performed simultaneously with the above-mentioned penetration stage, preliminary curing stage, deep curing stage and cooling stage. In this embodiment, real-time temperature monitoring and power regulation form a closed-loop control, which can accurately compensate for heat loss or local overheating during the curing process of the paint liquid. For example, a constant low temperature is maintained in the penetration stage to ensure the fluidity of the paint liquid, and the temperature is gradually increased in the curing stage to control the shrinkage stress, thereby significantly improving the density of the paint film and the process repeatability.

[0086] Furthermore, in some embodiments, the step of controlling the alarm unit to sound an alarm when the temperature of the motor stator 1 exceeds a threshold value and controlling the electric heating mechanism 3 and / or the induction heating mechanism 4 to shut down is also included. It is understandable that this step can be performed simultaneously with the above-mentioned penetration stage, preliminary curing stage, deep curing stage, and cooling stage. In this embodiment, the over-temperature threshold alarm and the automatic power-off function constitute a dual protection mechanism, which not only prevents carbonization of the paint film or insulation failure caused by thermal runaway, but also reduces equipment loss through timely intervention, extends the service life of the heating mechanism, and reduces the rework cost caused by quality accidents.

[0087] The motor stator heating device, paint dripping system, and paint dripping curing method of the present invention have at least the following advantages:

[0088] 1. Collaborative heating mechanism: The electric heating mechanism 3 provides a globally uniform temperature field to ensure low-viscosity flow of the paint liquid. The induction heating mechanism 4 rapidly heats the stator core 11 locally, driving the paint liquid to solidify from the inside out to prevent surface crusting. The two work together through timing control and power distribution algorithms to ensure curing efficiency and paint film forming quality.

[0089] 2. Precise temperature control: Combined with multi-point temperature measurement by the temperature measuring unit 5, temperature sensors 51 are placed in different areas to monitor the temperature in key areas. The heating power of the electric heating mechanism 3 and the induction heating mechanism 4 are adjusted in real time based on the monitored temperature to avoid local overheating or uneven curing, thereby achieving more precise, energy-saving, uniform and efficient paint heating.

[0090] 3. Staged heating: The electric heating mechanism 3 (external) and the induction heating mechanism 4 (internal) are used to heat the paint in a coordinated manner to eliminate blind spots. The paint liquid is heated in stages to achieve gradient curing, which significantly improves the density and uniformity of the paint film, thereby improving the mechanical and insulation properties of the motor stator 1.

[0091] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A motor stator heating device, wherein the motor stator (1) comprises a stator core (11) and a stator winding (12) wound on the stator core (11), wherein a cavity (10) is provided in the middle of the stator core (11), and wherein: The heating device comprises: A frame (2) for fixing the motor stator (1); An electric heating mechanism (3) is provided on the frame (2); the electric heating mechanism (3) is used to be connected to the output end of the stator winding (12) to heat the stator winding (12); An induction heating mechanism (4) is arranged on the frame (2); the induction heating mechanism (4) comprises an induction coil (42), and the induction coil (42) is used to pass through the cavity (10) to heat the stator core (11).

2. The motor stator heating device according to claim 1, characterized in that: The electric heating mechanism (3) comprises a heating element (31) and a clamping member (32); the heating element (31) is arranged on the frame (2), and the clamping member (32) is used to clamp and fix the heating element (31) and the output end of the stator winding (12).

3. The motor stator heating device according to claim 1, characterized in that: The induction heating mechanism (4) comprises a telescopic member (41), the induction coil (42) is wound around a driving end of the telescopic member (41), and the telescopic member (41) is used to drive the induction coil (42) to move along the axial direction of the stator core (11).

4. The motor stator heating device according to claim 3, characterized in that: The driving end of the telescopic member (41) comprises a plurality of support portions (411) sequentially arranged along the telescopic direction, and adjacent support portions (411) are detachably connected; a plurality of groups of induction coils (42) are provided, and the plurality of groups of induction coils (42) are respectively wound on the plurality of support portions (411).

5. The motor stator heating device according to any one of claims 1 to 4, characterized in that: Also includes: A temperature measuring unit (5) is used to monitor the temperature of the motor stator (1) in real time; A control unit (6) is connected to the electric heating mechanism (3), the induction heating mechanism (4), and the temperature measuring unit (5); the control unit (6) is used to receive temperature information from the temperature measuring unit (5) and adjust the power of the electric heating mechanism (3) and / or the induction heating mechanism (4) according to the temperature information.

6. The motor stator heating device according to claim 5, characterized in that: It also includes an alarm unit connected to the control unit (6); when the temperature obtained by the temperature measuring unit (5) exceeds a threshold value, the control unit (6) is suitable for controlling the alarm unit to issue an alarm and shut down the electric heating mechanism (3) and / or the induction heating mechanism (4).

7. The motor stator heating device according to any one of claims 1 to 4, characterized in that: It also includes a cooling mechanism, which is arranged on the frame (2) and located at one axial end of the cavity (10).

8. A motor stator paint dripping system, characterized in that: include: The heating device according to any one of claims 1 to 7; A paint dripping device (7) is used for dripping paint on the motor stator (1).

9. A method for curing paint dripping on a motor stator, using the heating device according to any one of claims 1 to 7, characterized in that: Including steps: Infiltration stage: turning on the electric heating mechanism (3) and controlling the electric heating mechanism (3) to heat the motor stator (1) to a first preset temperature; Initial curing stage: turning off the electric heating mechanism (3) and turning on the induction heating mechanism (4), controlling the induction heating mechanism (4) to heat the motor stator (1) to a second preset temperature, so that a gel layer is formed on the surface of the paint liquid on the motor stator (1); Deep curing stage: turning on the electric heating mechanism (3), controlling the electric heating mechanism (3) and the induction heating mechanism (4) to heat the motor stator (1) to a third preset temperature, and maintaining the temperature for a predetermined time.

10. The motor stator paint curing method according to claim 9, characterized in that: The electric heating mechanism (3) comprises a heating element (31) and a clamping member (32); the heating element (31) is arranged on the frame (2), and the clamping member (32) is used to clamp and fix the heating element (31) and the output end of the stator winding (12); During the infiltration stage and the deep curing stage, the motor stator (1) is heated by using the heating element (31).

11. The motor stator paint curing method according to claim 9, characterized in that: The induction heating mechanism (4) includes a telescopic member (41), the induction coil (42) is wound around a driving end of the telescopic member (41), and the telescopic member (41) is used to drive the induction coil (42) to move along the axial direction of the stator core (11); In the preliminary curing stage and the deep curing stage, the telescopic member (41) is used to adjust the heating position of the induction coil (42).

12. The motor stator paint curing method according to claim 11, characterized in that: The driving end of the telescopic member (41) comprises a plurality of supporting parts (411) sequentially arranged along the telescopic direction, and adjacent supporting parts (411) are detachably connected; the induction coils (42) are provided in a plurality of groups, and the plurality of groups of induction coils (42) are respectively wound on the plurality of supporting parts (411); Before the infiltration stage, the number of the support parts (411) and the induction coils (42) is adjusted according to the size of the stator core (11).

13. The method for curing paint dripping on a motor stator according to any one of claims 9 to 12, characterized in that: Also includes the steps: The temperature of the motor stator (1) is monitored in real time, and the power of the electric heating mechanism (3) and / or the induction heating mechanism (4) is adjusted according to the temperature information.

14. The motor stator paint curing method according to claim 13, characterized in that: Also includes the steps: When the temperature of the motor stator (1) exceeds a threshold value, the alarm unit is controlled to sound an alarm and the electric heating mechanism (3) and / or the induction heating mechanism (4) are controlled to be turned off.

15. The method for curing paint dripping on a motor stator according to any one of claims 9 to 12, characterized in that: Also includes the steps: Cooling stage: turning off the electric heating mechanism (3) and the induction heating mechanism (4), and turning on the cooling mechanism, and controlling the cooling mechanism to cool the motor stator (1) to room temperature.

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