High-temperature-resistant magnetic coupling heat insulation transmission mechanism and high-temperature heating equipment

Abstract

The application discloses a high-temperature-resistant magnetic coupling heat-insulation transmission mechanism and a high-temperature heating device. The high-temperature-resistant magnetic coupling heat-insulation transmission mechanism comprises a motor, and the motor is provided with an output shaft. The output shaft is fixedly connected with a first rotating disc. The first rotating disc and a second rotating disc are coaxially arranged oppositely and have an assembly gap therebetween. A heat-insulation space is formed between the first rotating disc and the second rotating disc, and a heat-insulation piece is arranged in the heat-insulation space. The first rotating disc is provided with a plurality of first magnetic attraction pieces, and the second rotating disc is provided with a plurality of second magnetic attraction pieces. The first magnetic attraction pieces and the second magnetic attraction pieces are coupled through a magnetic field. When the motor drives the first rotating disc to rotate through the output shaft, the second rotating disc is driven to rotate synchronously through the magnetic field coupling force. The high-temperature-resistant magnetic coupling heat-insulation transmission mechanism and the high-temperature heating device can solve the problems of serious heat conduction, easy wear, difficult sealing and unstable transmission of the transmission mechanism.

Description

Technical Field

[0001] This invention relates to the field of transmission mechanism technology, specifically to a high-temperature resistant magnetic coupling heat-insulating transmission mechanism and a high-temperature heating device. Background Technology

[0002] High-temperature heating equipment such as pizza ovens, steam ovens, baking ovens, air fryers, and food dryers generally operate at temperatures ≥150℃. Existing high-temperature heating equipment baking trays mostly use a through-shaft rigid transmission structure, where heat from the high-temperature cavity can be directly conducted to the motor through the metal transmission shaft, which easily causes the motor to age and burn out at high temperatures, resulting in a high equipment failure rate. At the same time, traditional rigid transmission suffers from mechanical friction loss, and lubrication failure at high temperatures can easily lead to problems such as jamming, vibration, and slippage. In addition, the through-shaft requires a high-temperature resistant dynamic sealing structure, which is difficult to seal, prone to heat and air leakage, and has high processing and maintenance costs. Moreover, conventional transmission structures have poor high-temperature stability and cannot meet the requirements of long-term continuous high-temperature operation above 150℃. Summary of the Invention

[0003] In order to solve the technical problems existing in the prior art, this application provides a high-temperature resistant magnetic coupling heat insulation transmission mechanism and a high-temperature heating device, which solves the problems of severe heat conduction, easy wear, difficult sealing, and unstable transmission in the transmission mechanism.

[0004] A high-temperature resistant magnetic coupling heat-insulating transmission mechanism includes a motor with an output shaft; the output shaft is fixedly connected to a first turntable, and the first turntable and a second turntable are arranged coaxially opposite each other with an assembly gap between them; a heat-insulating space is formed between the first turntable and the second turntable, and a heat-insulating component is provided in the heat-insulating space; the first turntable is provided with a plurality of first magnetic attracting components, and the second turntable is provided with a plurality of second magnetic attracting components; the first magnetic attracting components and the second magnetic attracting components are coupled together by magnetic field, and when the motor drives the first turntable to rotate through the output shaft, the second turntable is driven to rotate synchronously by means of magnetic field coupling force.

[0005] In some embodiments, the first magnetic attractor is evenly arranged along the circumference of the end face of the first turntable toward the second turntable, and the second magnetic attractor is evenly arranged along the circumference of the end face of the second turntable toward the first turntable, with each second magnetic attractor facing the first magnetic attractor at the corresponding position.

[0006] In some embodiments, the magnetic attractors on the same turntable are arranged alternately with N and S poles along the circumference, and the first magnetic attractor and the second magnetic attractor arranged oppositely have opposite poles.

[0007] In some embodiments, the first magnetic attractor and the second magnetic attractor are both high-temperature resistant samarium cobalt permanent magnets or neodymium iron boron permanent magnets.

[0008] In some embodiments, the insulation component is an aerogel fiberglass felt, a microporous calcium silicate insulation board, or a polyimide insulation board.

[0009] A high-temperature heating device includes a housing, a heating chamber inside the housing, a baking tray rotatably mounted inside the heating chamber, and a high-temperature resistant magnetic coupling heat-insulating transmission mechanism as described in any of the above claims. The housing is provided with a partition separating the heating chamber from an outer installation space, and the partition has a heat-insulating space. A motor and a first turntable are located on the side of the partition away from the heating chamber. A heat-insulating component and a second turntable are sequentially mounted inside the heat-insulating space from the outside to the inside. A connecting shaft is fixedly connected between the second turntable and the baking tray. One end of the connecting shaft passes through the bottom plate of the heating chamber and is fixed to the baking tray. A bushing is fixedly installed on the bottom plate of the heating chamber. The bushing is fitted onto the outside of the connecting shaft. At least two bearings are arranged axially between the bushing and the connecting shaft.

[0010] In some embodiments, a convex shaft extends axially from the center of the second turntable, and a convex sleeve is provided at one end of the connecting shaft to engage with the convex shaft. The outer circumference of the convex sleeve is provided with an external thread. A limiting platform is provided at the other end of the connecting shaft. An annular positioning platform is provided on the inner wall of the bushing. One bearing is assembled between the limiting platform and the positioning platform, and another bearing is fitted on the outside of the convex sleeve and is located between the positioning platform and the locking nut. The locking nut is threadedly fastened to the external thread of the convex sleeve.

[0011] In some embodiments, the bearing is a high-temperature resistant self-lubricating graphite bearing, the bushing is a high-temperature resistant heat-insulating bushing, and the connecting shaft is connected to the second turntable and the baking tray by key connection, threaded connection, flange locking or welding.

[0012] The beneficial effects of this application are as follows: This application adopts non-contact magnetic coupling transmission, eliminating the through-type rigid rotating shaft, completely blocking the conduction of heat from the high-temperature cavity to the motor, effectively avoiding the risk of high-temperature damage to the motor, and significantly extending the service life of the equipment; the magnetic attraction of the turntable is evenly distributed, and the force is balanced, which can effectively reduce operating vibration and sway, and the transmission is smooth without slippage or decoupling problems, with strong adaptability to high-temperature working conditions; the magnetic attraction transmission has no mechanical friction loss, and no high-temperature lubrication maintenance is required, resulting in lower operation and maintenance costs; the heat insulation component does not shield the magnetic field, and can simultaneously block heat conduction and heat radiation, ensuring transmission efficiency while improving heat insulation performance; in addition, there is no need to set a high-temperature resistant dynamic sealing structure, simplifying the equipment structure and reducing the difficulty of processing and assembly; the double bearing limiting structure further improves the coaxiality and stability of the rotating shaft, making it suitable for continuous rotation operation of baking trays in various high-temperature heating equipment, with strong practicality and versatility.

[0013] Additional aspects and advantages of this application will continue to be set forth in the description which follows, in part from the description which follows, or may be learned by practice of this application. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0015] Figure 1This is a top-view three-dimensional structural diagram of this application.

[0016] Figure 2 yes Figure 1 A schematic diagram of the split structure.

[0017] Figure 3 This is a three-dimensional structural diagram of this application viewed from below.

[0018] Figure 4 This is a cross-sectional structural diagram of this application.

[0019] Figure 5 This is a cross-sectional structural diagram of a high-temperature heating device.

[0020] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0021] Reference numerals: Motor 1, Output shaft 1a, First turntable 2, First magnetic chuck 20, Second turntable 3, Protruding shaft 3a, Second magnetic chuck 30, Insulation space 4, Insulation component 5, High-temperature heating equipment 6, Housing 60, Heating cavity 61, Base plate 610, Baking tray 62, Partition 63, Connecting shaft 64, Protruding sleeve 64a, External thread 64b, Limiting platform 64c, Bushing 65, Positioning platform 65a, Bearing 66, Locking nut 67. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] Reference Figures 1-4A high-temperature resistant magnetic coupling heat-insulating transmission mechanism, wherein the high-temperature resistance refers to the ability to withstand temperatures ≥150℃; it includes a motor 1, the motor 1 having an output shaft 1a; the output shaft 1a is fixedly connected to a first turntable 2, the first turntable 2 and a second turntable 3 are coaxially arranged opposite each other with an assembly gap between them; a heat-insulating space 4 is formed between the first turntable 2 and the second turntable 3, and a heat-insulating component 5 is provided in the heat-insulating space 4; the first turntable 2 has a plurality of first magnetic attracting components 20, and the second turntable 3 has a plurality of second magnetic attracting components 30; the first magnetic attracting components 20 and the second turntable 3 are connected to the first turntable 2 and the second turntable 3. The two magnetic components 30 are coupled together via magnetic field. When the motor 1 drives the first turntable 2 to rotate via the output shaft 1a, the magnetic field coupling force drives the second turntable 3 to rotate synchronously. This application uses the coaxially separated first turntable 2 and second turntable 3, combined with the heat insulation space 4 and heat insulation component 5 in between, to transmit torque through non-contact magnetic field coupling, eliminating the rigid connection through the shaft. Heat from the high-temperature cavity side cannot be directly conducted to the motor 1 end via the metal shaft. The heat insulation component 5 blocks heat radiation and heat conduction, significantly reducing the risk of heat damage to the motor 1. Magnetic drive has no mechanical friction loss and operates smoothly. The magnetic components are compatible with various transmission forms such as permanent magnet and eddy current, and are suitable for high-temperature conditions above 200℃. The structure is compact and the sealing is simple, eliminating the need for high-temperature dynamic seals, reducing equipment processing and maintenance costs, and meeting the baking tray rotation drive requirements of various high-temperature heating equipment.

[0024] In some embodiments, the first magnetic attractor 20 is evenly arranged along the circumference of the end face of the first turntable 2 towards the second turntable 3, and the second magnetic attractor 30 is evenly arranged along the circumference of the end face of the second turntable 3 towards the first turntable 2. Each second magnetic attractor 30 is directly opposite to the corresponding first magnetic attractor 20. The magnetic attractors are evenly distributed around the circumference and arranged in pairs, resulting in uniform magnetic pull at all points around the circumference. This balances the forces during the turntable rotation, effectively reducing sway and vibration, and ensuring smooth transmission. The paired magnetic attractor structure maximizes the magnetic field coupling efficiency, allowing for a larger transmission torque output with the same specification magnets, and avoiding slippage caused by insufficient local magnetic force. The even arrangement can disperse thermal stress, adapting to the high-temperature working environment of the equipment and reducing magnetic misalignment caused by high-temperature deformation. This arrangement structure is easy to process and assemble, facilitating mass production, while also improving the transmission stability and service life of the mechanism.

[0025] In some embodiments, the magnetic attractors on the same turntable are arranged alternately with N and S poles along the circumference, and the first magnetic attractor 20 and the second magnetic attractor 30 arranged oppositely have opposite poles facing each other. The alternating arrangement of the magnetic attractors N and S with opposite poles facing each other on both sides can make full use of the magnetic attraction force, greatly improve the magnetic field coupling utilization rate and output torque. The magnetic fields of adjacent magnetic poles cancel each other out leakage magnetic field, reduce magnetic loss, and have higher transmission efficiency. The circumferential magnetic pole arrangement is evenly stressed, and the radial forces counterbalance each other when the turntable rotates, resulting in small operating vibration and good coaxiality. The coupling structure with opposite poles attracting has strong fault tolerance, and can still reliably transmit force after slight deformation due to high temperature. It is not easy to decouple and slip, adapts to high temperature working conditions, and extends the service life of the whole machine.

[0026] In some embodiments, the first magnetic attractor 20 and the second magnetic attractor 30 are both high-temperature resistant samarium cobalt permanent magnets or neodymium iron boron permanent magnets. The selection of samarium cobalt and high-temperature neodymium iron boron permanent magnets results in low demagnetization rate and stable magnetic properties under high-temperature conditions, ensuring continuous and stable output of coupling magnetic force under high-temperature conditions. The materials have excellent coercivity and are not easily affected by temperature rise, making them suitable for use in high-temperature cavities above 200°C, thus balancing transmission reliability and product practicality.

[0027] In some embodiments, the heat insulation component 5 is an aerogel fiberglass felt, a microporous calcium silicate heat insulation board, or a polyimide heat insulation board; all three materials are resistant to high temperatures and have low thermal conductivity, which can effectively block heat from being conducted from the high-temperature side to the motor 1, preventing the motor 1 from overheating and being damaged; none of the materials are magnetic, so they will not shield the coupled magnetic field or affect the transmission torque; the materials can be selected in soft and hard specifications to adapt to different cavity assembly and to be suitable for long-term operation of high-temperature steaming and baking equipment.

[0028] Refer to Figures 5-6 A high-temperature heating device 6 includes a housing 60, a heating chamber 61 inside the housing 60, and a baking tray 62 rotatably mounted inside the heating chamber 61. It also includes the high-temperature resistant magnetic coupling heat-insulating transmission mechanism described in any of the above-mentioned claims. The housing 60 has a partition 63 separating the heating chamber 61 from the outer installation space. A heat-insulating space 4 is formed at the lower middle part of the partition 63. A motor 1 and a first turntable 2 are located on the side of the partition 63 away from the heating chamber 61. A heat-insulating component 5 and a second turntable 3 are sequentially mounted inside the heat-insulating space 4 from the outside to the inside. A connecting shaft 64 is fixedly connected between the second turntable 3 and the baking tray 62. One end of the connecting shaft 64 passes through the bottom plate of the heating chamber 61 and is fixed to the baking tray 62. A bushing 65 is fixedly installed in the middle of the bottom plate 610 of the heating chamber 61. The bushing 65 is fitted on the outside of the connecting shaft 64. Two bearings 66 are arranged axially between the bushing 65 and the connecting shaft 64. This equipment relies on a magnetic coupling mechanism to isolate the high temperature conduction of the furnace cavity. The partition plate 63, together with the heat insulation component, blocks the heat from being transferred to the motor 1 through the turntable. The two bearings 66 limit and support the connecting shaft 64, ensuring smooth operation and good coaxiality, and reducing frictional heat generation. The sealing structure of the furnace body through the transmission shaft is eliminated, preventing the leakage of high temperature flue gas. The integrated layout of heat insulation and transmission effectively protects the motor 1 from the high temperature of the cavity, extends the service life of the whole machine, and is suitable for continuous rotation operation of the high temperature baking pan 62.

[0029] In some embodiments, a convex shaft 3a extends axially from the center of the second turntable 3. One end of the connecting shaft 64 is provided with a convex sleeve 64a that engages with the convex shaft 3a, and the outer circumference of the convex sleeve 64a is provided with an external thread 64b. The other end of the connecting shaft 64 is provided with a limiting platform 64c. The inner wall of the bushing 65 is provided with an annular positioning platform 65a. One bearing 66 is assembled between the limiting platform 64c and the positioning platform 65a, and another bearing 66 is fitted on the outside of the convex sleeve 64a and is located between the positioning platform 65a and the locking nut 67. The locking nut 67 and the convex sleeve... The external thread of 64a and the thread of 64b are fastened; the cam shaft 3a and the cam sleeve 64a are inserted to achieve precise radial positioning, ensuring that the second turntable 3 and the connecting shaft 64 are coaxial; the two sets of bearings 66 are clamped by the limit table 64c, the positioning table 65a and the locking nut 67 to complete the axial limit, making assembly and disassembly simple; the double bearings are placed on both sides, providing stable rotation support and reducing shaft sway and wear; the threaded locking structure is reliable and not easy to loosen under high temperature conditions, which can not only stably transmit torque to drive the baking pan 62 to rotate, but also facilitate the later maintenance and replacement of parts.

[0030] In some embodiments, bearing 66 is a high-temperature resistant self-lubricating graphite bearing, bushing 65 is a high-temperature resistant heat-insulating bushing, and connecting shaft 64 is fixed to the second turntable 3 and baking tray 62 by key connection, threaded connection, flange locking or welding; graphite bearing is high-temperature resistant and self-lubricating, and does not jam at high temperatures; heat-insulating bushing blocks heat from being transferred outward along the shaft; multiple fixing methods are available to adapt to different production and assembly needs, the connection is firm and not easy to loosen, ensuring the stable operation of baking tray 62 and suitable for long-term use of high-temperature equipment.

[0031] Working Principle: This application employs non-contact magnetic coupling transmission combined with a layered heat insulation structure to achieve stable transmission and efficient heat insulation in high-temperature environments, suitable for operating conditions ≥150℃. The equipment separates the high-temperature heating chamber 61 from the external ambient temperature installation space through a partition 63, placing the motor 1 and the first turntable 2 on the low-temperature side to reduce the impact of heat sources from the source. During operation, the output shaft 1a of the motor 1 drives the first turntable 2 to rotate at a uniform speed. Relying on the coaxial and opposite structure of the two turntables, a stable magnetic field coupling system is formed with high-temperature resistant magnetic attractors evenly distributed around the circumference of the turntable and opposite poles facing each other. The alternating arrangement of magnetic poles on the same turntable can reduce the impact of heat sources. With minimal magnetic leakage and improved magnetic utilization, the second turntable 3 rotates synchronously without contact, relying on the attraction of opposite magnetic fields to achieve torque transmission without rigid friction. The heat insulation space 4 between the two turntables contains a non-magnetic heat insulation component 5, which effectively blocks heat conduction and radiation from the heating chamber 61 without affecting the magnetic field transmission, preventing high temperature from spreading to the motor 1. The second turntable 3 drives the baking tray 62 inside the heating chamber 61 to rotate through a plug-in connecting shaft 64. At the same time, the bushing and double high-temperature resistant graphite bearings form a bidirectional limiting support structure, restricting axial movement and radial wobble of the shaft, ensuring coaxiality and stability during operation. The entire structure eliminates the through-rigid transmission and dynamic sealing structure, taking into account stable transmission, efficient heat insulation, and high-temperature durability.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] It should be noted that the terms "a," "b," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0034] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A high-temperature resistant magnetic coupling heat-insulating transmission mechanism, comprising a motor, the motor having an output shaft, characterized in that: The output shaft is fixed to the first turntable, and the first turntable and the second turntable are arranged coaxially opposite each other with an assembly gap between them; a heat insulation space is formed between the first turntable and the second turntable, and a heat insulation component is provided in the heat insulation space; The first turntable is provided with a number of first magnetic attractors, and the second turntable is provided with a number of second magnetic attractors. The first magnetic attractors and the second magnetic attractors are coupled together by magnetic field. When the motor drives the first turntable to rotate through the output shaft, the second turntable is driven to rotate synchronously by means of magnetic field coupling force.

2. The high-temperature resistant magnetic coupling heat-insulating transmission mechanism as described in claim 1, characterized in that: The first magnetic components are evenly arranged along the circumference of the end face of the first turntable towards the second turntable, and the second magnetic components are evenly arranged along the circumference of the end face of the second turntable towards the first turntable. Each second magnetic component is directly opposite the first magnetic component at the corresponding position.

3. The high-temperature resistant magnetic coupling heat-insulating transmission mechanism as described in claim 2, characterized in that: The magnetic attractors on the same turntable are arranged with alternating N and S poles along the circumference, and the first and second magnetic attractors are arranged with opposite poles facing each other.

4. The high-temperature resistant magnetic coupling heat-insulating transmission mechanism as described in claim 3, characterized in that: Both the first and second magnetic components are made of high-temperature resistant samarium cobalt permanent magnets or neodymium iron boron permanent magnets.

5. The high-temperature resistant magnetic coupling heat-insulating transmission mechanism as described in any one of claims 1 to 4, characterized in that: The insulation components are aerogel fiberglass felt, microporous calcium silicate insulation board, or polyimide insulation board.

6. A high-temperature heating device, comprising a housing, a heating chamber within the housing, and a baking tray rotatably mounted within the heating chamber, characterized in that: It also includes the high-temperature resistant magnetic coupling heat-insulating transmission mechanism as described in any one of claims 1 to 5; the housing is provided with a partition separating the heating chamber from the outer installation space, the partition has a heat-insulating space, the motor and the first turntable are located on the side of the partition away from the heating chamber, and the heat-insulating component and the second turntable are sequentially assembled inside the heat-insulating space from the outside to the inside; a connecting shaft is fixedly connected between the second turntable and the baking tray, one end of the connecting shaft passes through the bottom plate of the heating chamber and is fixed to the baking tray, a bushing is fixedly installed on the bottom plate of the heating chamber, the bushing is fitted on the outside of the connecting shaft, and at least two bearings are arranged axially between the bushing and the connecting shaft.

7. The high-temperature heating device as described in claim 6, characterized in that: The second turntable has a convex shaft extending axially from the middle. One end of the connecting shaft is provided with a convex sleeve that is inserted and fitted with the convex shaft. The outer circumference of the convex sleeve is provided with an external thread. The other end of the connecting shaft is provided with a limiting platform. The inner wall of the bushing is provided with an annular positioning platform. One bearing is assembled between the limiting platform and the positioning platform. Another bearing is fitted on the outside of the convex sleeve and is located between the positioning platform and the locking nut. The locking nut is threadedly fastened to the external thread of the convex sleeve.

8. The high-temperature heating device as described in claim 6, characterized in that: The bearings are high-temperature resistant self-lubricating graphite bearings, and the bushings are high-temperature resistant heat-insulating bushings. The connecting shaft is connected to the second turntable and baking tray by key connection, threaded connection, flange locking or welding.

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