High-temperature-resistant fire-fighting robot driving shaft sealing structure and driving shaft and vehicle body connecting system

Abstract

The invention relates to a high-temperature-resistant fire-fighting robot driving shaft sealing structure and a driving shaft and vehicle body connecting system. The high-temperature-resistant fire-fighting robot driving shaft sealing structure comprises a gradient composite driving shaft, a ceramic-based bearing seat, a three-stage sealing assembly and an integrated cooling cover. Wherein the three-stage sealing assembly is composed of a magnetic control shape memory alloy main sealing layer, a bionic vortex air film secondary sealing layer and a piezoelectric active compensation layer, and efficient sealing and rapid maintenance are achieved in combination with the design of a micro-channel phase change cooling structure and a quick release connector. The effect of remarkably improving the sealing performance of the driving shaft of the fire-fighting robot is achieved, particles are effectively prevented from invading, the working temperature is reduced, meanwhile, the reliability and convenience of the structure are ensured, and the use requirement under the complex working condition is met.

Description

Technical Field

[0001] The present application relates to the field of fire-fighting robot drive shaft sealing and connection, and in particular to a high-temperature resistant fire-fighting robot drive shaft sealing structure and a drive shaft and vehicle body connection system. Background Art

[0002] Firefighting robots are essential equipment for modern firefighting and rescue operations. Their reliability in harsh environments such as high temperature, high humidity, and dust directly impacts the efficiency and safety of rescue missions. The sealing performance of the connection between the drive shaft and the vehicle body is a key factor in ensuring the proper operation of the robot. As the application scenarios of firefighting robots continue to expand, the requirements for the drive shaft sealing structure are becoming increasingly stringent, especially in maintaining stable sealing performance in extreme environments.

[0003] Currently, the industry typically employs several technical approaches to address sealing issues at the connection between the driveshaft and the vehicle body: one uses traditional rubber seals, which achieve sealing through elastic deformation; another employs a labyrinthine seal structure, which uses multiple tortuous channels to block the entry of foreign matter; and a third employs a combined seal structure, which combines multiple sealing methods to enhance sealing effectiveness. These approaches can, to a certain extent, meet sealing requirements in common environments.

[0004] However, these traditional sealing technologies have significant shortcomings in extreme environments. Rubber seals are susceptible to aging and wear due to high temperatures and chemical corrosion, leading to seal failure. Labyrinth seals are prone to leakage in high-humidity environments. While modular seals can partially alleviate these issues, they are expensive and complex to maintain, making them difficult to meet the rapid maintenance requirements of firefighting robots. These issues severely impact the reliability and service life of firefighting robots in complex environments. Summary of the Invention

[0005] In order to overcome the above technical problems, the present application provides a high-temperature resistant fire-fighting robot drive shaft sealing structure and a drive shaft and vehicle body connection system.

[0006] The present application provides a high-temperature resistant fire-fighting robot drive shaft sealing structure adopts the following technical solution: A high-temperature resistant fire-fighting robot drive shaft sealing structure, comprising a gradient composite drive shaft, a ceramic-based bearing seat, a three-stage sealing assembly and an integrated cooling cover; the gradient composite drive shaft passes through the ceramic-based bearing seat and is fixedly connected to the vehicle body connection assembly by threads or interference fit; the three-stage sealing assembly comprises, from the inside to the outside, a magnetically controlled shape memory alloy main sealing layer, a bionic vortex air film secondary sealing layer and a piezoelectric active compensation layer; the magnetically controlled shape memory alloy main sealing layer is nested between the gradient composite drive shaft and the ceramic-based bearing seat, the bionic vortex air film secondary sealing layer is arranged on the outer surface of the ceramic-based bearing seat, and the piezoelectric active compensation layer covers the outer side of the bionic vortex air film secondary sealing layer.

[0007] By adopting the above technical solutions, the combination of the gradient composite drive shaft and the ceramic-based bearing seat ensures a stable connection in high-temperature environments. At the same time, the friction is enhanced through micron-level roughness treatment, which improves the durability of the structure. The magnetically controlled shape memory alloy main sealing layer can achieve dynamic compensation in extreme environments, ensuring that the sealing gap is maintained at 0.1mm and the pressure resistance reaches 2.5MPa. The bionic vortex air film secondary sealing layer significantly improves the dustproof performance. The real-time flatness adjustment of the piezoelectric active compensation layer further enhances the accuracy and adaptability of the seal. The integrated cooling cover can dissipate heat efficiently, ensuring that the sealing surface temperature does not exceed 95°C under high heat flux density, thereby extending the service life of the overall structure. Multi-stage dynamic sealing is achieved at the connection between the fire-fighting robot drive shaft and the vehicle body, effectively improving the sealing performance and reliability.

[0008] Preferably, the gradient composite drive shaft includes a nitrided steel substrate and a laser cladding coating, the coating thickness is 0.3 mm, and the surface hardness is HV1100; the gradient composite drive shaft and the ceramic-based bearing seat are radially positioned by interference fit, and axially positioned by an end face stop.

[0009] By adopting this technical solution, the gradient composite drive shaft utilizes a nitrided steel substrate and a laser-clad coating with a thickness of 0.3mm and a surface hardness of HV1100. This significantly improves the drive shaft's wear and corrosion resistance, effectively resisting the effects of high temperature, high humidity, and dusty environments. Furthermore, the gradient composite drive shaft and ceramic-based bearing housing are radially positioned through an interference fit, and axially positioned through end stoppers, ensuring a stable and reliable connection and preventing loosening or displacement under dynamic swinging conditions, thereby enhancing the service life and performance of the overall sealing structure.

[0010] Preferably, the ceramic-based bearing seat adopts a ceramic-based composite material, the inner hole taper is 1:15, and the interference is 0.02-0.03mm; the inner hole surface of the ceramic-based bearing seat is provided with a micron-level roughness treatment.

[0011] By adopting this technical solution, the ceramic-based bearing seat, constructed from ceramic-matrix composite materials, features an inner bore taper of 1:15 and an interference fit of 0.02-0.03mm. This design significantly improves the connection strength and stability between the drive shaft and the bearing seat, effectively preventing loosening or failure in high-temperature, high-humidity, and dusty environments. The micron-level roughness treatment of the inner bore surface further enhances friction with the gradient composite drive shaft, ensuring a reliable fit even under dynamic swinging conditions, thereby extending the service life and reliability of the overall sealing structure.

[0012] Preferably, the magnetically controlled shape memory alloy main sealing layer includes a shape memory alloy ring with a phase transition temperature of 150°C, a double-layer structure gap of 0.1mm, and is filled with magnetic fluid; the shape memory alloy ring is nested in the inner hole of the ceramic-based bearing seat through thermal expansion.

[0013] By adopting the above technical solution, the magnetically controlled shape memory alloy main sealing layer can achieve dynamic sealing compensation in high-temperature environments. Specifically, the shape memory alloy ring made of NiTiNb undergoes a phase change when it reaches a phase transition temperature of 150°C, effectively compensating for the gap changes caused by thermal expansion and ensuring the stability of the sealing performance. The magnetic fluid filling the gap of the double-layer structure is composed of a perfluoropolyether-based liquid, which can fill tiny gaps under the action of a magnetic field to form a stable sealing barrier with a pressure resistance of 2.5MPa. In addition, the shape memory alloy ring is nested in the inner hole of the ceramic-based bearing seat through thermal expansion, further enhancing the reliability of the structure and the sealing effect.

[0014] Preferably, the bionic vortex air film secondary sealing layer includes a double-headed spiral groove with a groove depth of 0.1 mm and a helical angle of 30°; the double-headed spiral groove is formed on the outer surface of the ceramic-based bearing seat by precision machining.

[0015] By adopting the above technical solution, the bionic vortex air film secondary sealing layer can form an efficient air film seal on the outer surface of the ceramic-based bearing seat. Specifically, the double-headed spiral groove design, combined with specific groove depth and helix angle parameters, can generate a stable 0.08mm thick air film at a compressed air inlet pressure of 0.6-0.8MPa, effectively blocking the intrusion of external PM10 particles with a blocking efficiency of 99.99%. This design significantly improves the sealing structure's protection capabilities in high-dust environments and ensures the reliability of the connection between the firefighting robot's drive shaft and the vehicle body.

[0016] Preferably, the piezoelectric active compensation layer includes a 64-zone PZT-5H ceramic array, and the flatness adjustment error is less than 0.5 μm; the piezoelectric active compensation layer is fixed to the outer side of the bionic vortex air membrane secondary sealing layer by an adhesive.

[0017] By adopting this technical solution, the piezoelectric active compensation layer in the sealing structure at the connection between the drive shaft and the vehicle body achieves high-precision flatness adjustment through a 64-zone PZT-5H ceramic array, with an error controlled within 0.5μm, significantly improving the fit and stability of the sealing interface. Simultaneously, the piezoelectric active compensation layer is fixed to the outer side of the bionic vortex air film secondary sealing layer using an adhesive, ensuring structural reliability and ease of assembly. Combined with the efficient particle blocking function provided by the bionic vortex air film secondary sealing layer, the overall sealing performance is further enhanced, effectively preventing the intrusion of external foreign matter and extending the service life of the firefighting robot in extreme environments.

[0018] Preferably, the integrated cooling cover includes a microchannel phase change cooling structure, and the integrated cooling cover is fixed to the vehicle body connection assembly by bolts.

[0019] By adopting this technical solution, the integrated cooling cover's microchannel phase-change cooling structure effectively reduces sealing surface temperatures in extreme environments such as high temperature, high humidity, and dust, significantly improving the thermal stability of the sealing structure. Furthermore, the bolted connection between the integrated cooling cover and the vehicle body assembly is more secure and reliable, facilitating quick assembly and disassembly and maintenance.

[0020] Preferably, a quick-release interface is further included, which fixes the integrated cooling cover on the vehicle frame and includes 8 hydraulic locking pins, which are hydraulically driven to achieve rapid locking and unlocking of the vehicle body connection assembly.

[0021] By implementing this technical solution, the connection between the firefighting robot's drive shaft and the vehicle body is fast and reliably sealed. Specifically, the hydraulic locking pin provides 80kN of preload, ensuring connection stability. Its hydraulic drive reduces assembly and disassembly time to no more than 7 minutes and 30 seconds, significantly improving maintenance efficiency. This design effectively addresses the time-consuming disassembly of traditional structures and meets the firefighting robot's rapid maintenance needs in complex environments.

[0022] Preferably, the integrated cooling cover is provided with fiber grating sensors, which are arranged at 8 points circumferentially for real-time monitoring of the sealing surface temperature and strain; the fiber grating sensors are embedded in the interior of the integrated cooling cover and are led out to external monitoring equipment through optical fibers.

[0023] By employing this technical solution, the embedded fiber Bragg grating sensor design accurately monitors temperature and strain changes on the sealing surface, providing highly accurate data feedback with an error of less than 5%. An eight-point circumferential monitoring network ensures full coverage of the sealing surface, enhancing the comprehensiveness and reliability of monitoring. Fiber optics are then routed to external monitoring equipment, enabling remote data transmission and analysis, facilitating timely identification of potential issues and enabling maintenance, thereby extending the service life of the entire structure.

[0024] A fire-fighting robot drive shaft and vehicle body connection system includes the fire-fighting robot drive shaft sealing structure and a vehicle body connection assembly as described in the first aspect, wherein the vehicle body connection assembly is mounted in conjunction with the ceramic-based bearing seat by bolts or snaps.

[0025] By adopting the above technical solution, the mechanical strength and heat resistance of the connection between the drive shaft and the vehicle body are significantly improved through the combination of the gradient composite drive shaft and the ceramic-based bearing seat, ensuring reliable operation in a high-temperature environment of 1000°C. The three-stage sealing component setting, including the magnetically controlled shape memory alloy main sealing layer, the bionic vortex air film secondary sealing layer and the piezoelectric active compensation layer, can effectively prevent external foreign matter from entering the interior of the drive shaft, with a leakage rate as low as 0.003mL / min, which is much lower than the traditional structure. The microchannel phase change cooling structure of the integrated cooling cover ensures that the sealing surface temperature does not exceed 95°C under extreme heat flux density, effectively preventing the influence of high temperature on sealing performance. The connection system has excellent sealing performance, reliable high-temperature resistance and convenient maintenance characteristics, and is suitable for complex application scenarios such as petrochemicals and forest fires.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. In extreme environments such as high temperature, high humidity, and dust, the synergistic effect of the magnetically controlled shape memory alloy primary sealing layer and the bionic vortex air film secondary sealing layer achieves a leakage rate of less than 0.01mL / min, significantly improving sealing performance and effectively preventing the intrusion of external foreign matter; 2. The combination of a gradient composite drive shaft and a ceramic-based bearing seat, combined with the real-time adjustment function of the piezoelectric active compensation layer, ensures that the sealing structure remains stable under dynamic drive shaft swing (±5°), extending the service life to 1,500 hours. 3. The integrated cooling cover combined with the quick-release interface design significantly shortens maintenance time to less than 7.5 minutes, while meeting the needs of rapid maintenance and improving the reliability and operating efficiency of the fire-fighting robot in complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the seal structure of the drive shaft of a fire-fighting robot in the present application.

[0028] Figure 2This is a cross-sectional view of the seal structure of a fire-fighting robot drive shaft according to the present application.

[0029] Figure 3 This is an exploded view of the drive shaft seal structure of a fire-fighting robot in the present application.

[0030] Explanation of the accompanying drawings: 1. Gradient composite drive shaft; 11. Base; 12. Coating; 13. End stop; 2. Ceramic-based bearing seat; 3. Three-stage sealing assembly; 31. Magnetically controlled shape memory alloy primary sealing layer; 311. Memory alloy ring; 32. Bionic vortex air film secondary sealing layer; 321. Double-headed spiral groove; 33. Piezoelectric active compensation layer; 331. Ceramic array; 4. Integrated cooling cover; 41. Microchannel phase change cooling structure; 42. Fiber Bragg grating sensor; 5. Quick release interface; 51. Hydraulic locking pin. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-3 This application is described in further detail.

[0032] The embodiment of the present application discloses a high temperature resistant fire fighting robot drive shaft sealing structure and a drive shaft and vehicle body connection system. Figure 1 、 Figure 2 The fire-fighting robot drive shaft sealing structure includes a gradient composite drive shaft 1, a ceramic-based bearing seat 2, a three-stage sealing assembly 3, and an integrated cooling cover 4. The gradient composite drive shaft 1 passes through the ceramic-based bearing seat 2 and is fixedly connected to the vehicle body connection assembly through threads or interference fit. The three-stage sealing assembly 3 is composed of a magnetic shape memory alloy primary sealing layer 31, a bionic vortex air film secondary sealing layer 32, and a piezoelectric active compensation layer 33 from the inside to the outside. The magnetic shape memory alloy primary sealing layer 31 is nested between the gradient composite drive shaft 1 and the ceramic-based bearing seat 2, the bionic vortex air film secondary sealing layer 32 is arranged on the outer surface of the ceramic-based bearing seat 2, and the piezoelectric active compensation layer 33 covers the outer side of the bionic vortex air film secondary sealing layer 32, achieving the effect of significantly improving the sealing performance, and the reasons for the generation of this beneficial effect are deduced.

[0033] Reference Figure 2 Specifically, the gradient composite drive shaft 1 includes a 38CrMoAl nitrided steel substrate 11 and a laser-clad WC-10Co-4Cr coating 12. The substrate 11 material can be selected from other high-strength, heat-resistant materials, such as 42CrMo alloy steel. The coating 12 has a thickness of 0.3 mm and a surface hardness of HV1100. The coating 12 material can be replaced with other high-hardness and wear-resistant materials, such as TiN coating 12. The gradient composite drive shaft 1 and the ceramic-based bearing seat 2 are radially positioned by interference fit, and axially positioned by the end face stop 13. The interference fit can be achieved through different forms of mechanical connection, such as keyway fit. The end face stop 13 can be designed to be conical or in other forms to improve precision and stability.

[0034] The ceramic-based bearing seat 2 is constructed from a Si-N ceramic-based composite material, with an inner bore taper of 1:15 and an interference fit of 0.02-0.03mm. The ceramic-based material can also be made from other high-strength, heat-resistant materials, such as Al-O ceramics. The inner bore surface is treated with a micron-level roughness to enhance friction with the gradient composite drive shaft 1. Other surface treatments are also possible, such as electroless nickel plating.

[0035] The main magnetically controlled shape memory alloy sealing layer 31 comprises a NiTiNb shape memory alloy ring 311 with a phase transition temperature of 150°C. When the temperature reaches 150°C, the shape memory alloy undergoes a phase transition, further sealing the structure and preventing heat from entering the vehicle body and affecting the drive shaft. The double-layer structure has a gap of 0.1 mm and is filled with a magnetic fluid composed of Fe-O-@SiO-core-shell particles (particle size 10 nm, 8% volume fraction) dispersed in a perfluoropolyether-based fluid. The shape memory alloy ring 311 is nested within the inner bore of the ceramic-based bearing seat 2 through thermal expansion. The shape memory alloy material can be replaced with other materials with similar properties, such as NiTi alloy. The magnetic fluid composition can be adjusted according to actual needs, such as using other magnetic particles.

[0036] The bionic vortex air film secondary sealing layer 32 includes a double-ended spiral groove 321 with a groove depth of 0.1mm and a helix angle of 30°. The compressed air inlet pressure range is 0.6-0.8MPa, forming a 0.08mm air film with a PM10 blocking efficiency of 99.99%. The double-ended spiral groove 321 is precision-machined into the outer surface of the ceramic-based bearing seat 2. The spiral groove can be designed in other forms, such as multi-ended spiral grooves. The compressed air pressure range can be adjusted according to actual needs.

[0037] The piezoelectric active compensation layer 33 comprises a 64-zone PZT-5H ceramic array 331, with a flatness adjustment error of less than 0.5 μm. The piezoelectric active compensation layer 33 is secured to the outer side of the bionic vortex air membrane secondary sealing layer 32 using an adhesive. The piezoelectric material can be replaced with other materials with similar properties, such as PZT-4. The adhesive can also be used with other connection methods, such as mechanical fixing.

[0038] The integrated cooling cover 4 includes a microchannel phase-change cooling structure 41. The liquid metal Ga68In20Sn12 flows at a rate of 3 L / min, and the sealing surface temperature does not exceed 95°C at a heat flux of 2 MW / m². The integrated cooling cover 4 is bolted to the vehicle body connection assembly. The cooling structure can be designed in other ways, such as a water-cooled structure. Other fixing methods, such as snap-on fastening, are also possible.

[0039] Reference Figure 3The firefighting robot's drive shaft seal structure also includes a quick-release interface 5, which includes eight hydraulic locking pins 51 with a preload of 80 kN and a removal and assembly time of no more than 7 minutes and 30 seconds. These hydraulic locking pins 51 are hydraulically actuated to quickly lock and unlock the connection assembly with the vehicle body. The number of locking pins can be adjusted based on actual needs, for example, six locking pins may be used.

[0040] Reference Figure 2 、 Figure 3 The integrated cooling cover 4 is equipped with fiber grating (FBG) sensors 42 at eight locations around the circumference, providing real-time monitoring of sealing surface temperature and strain. The FBG sensors 42 are embedded within the integrated cooling cover 4 and are connected to external monitoring equipment via optical fibers. The sensor layout can be adjusted to meet specific needs, such as a 12-point arrangement.

[0041] The working principle of this embodiment is as follows: the combination of a gradient composite drive shaft 1, a ceramic-based bearing seat 2, a three-stage sealing assembly 3, and an integrated cooling cover 4 achieves a highly efficient seal at the connection between the drive shaft and the vehicle body. The gradient composite drive shaft 1 provides high strength and wear resistance, the ceramic-based bearing seat 2 provides high precision and heat resistance, the three-stage sealing assembly 3 provides multiple protections, and the integrated cooling cover 4 provides heat dissipation. The overall structural design is rational, with excellent performance, and can meet the needs of firefighting robots in extreme environments.

[0042] This embodiment also includes a fire-fighting robot drive shaft and vehicle body connection system, which includes a fire-fighting robot drive shaft sealing structure and a vehicle body connection component, and the vehicle body connection component is installed in conjunction with the ceramic-based bearing seat 2 through bolts or snaps.

[0043] Through the cooperation of the gradient composite drive shaft 1 and the ceramic-based bearing seat 2, the mechanical strength and heat resistance of the connection between the drive shaft and the vehicle body are significantly improved, ensuring reliable operation in a high-temperature environment of 1000°C. The setting of the three-stage sealing component 3, including the magnetically controlled shape memory alloy main sealing layer 31, the bionic vortex air film secondary sealing layer 32 and the piezoelectric active compensation layer 33, can effectively prevent external foreign matter from entering the interior of the drive shaft, and the leakage rate is as low as 0.003mL / min, which is much lower than the traditional structure. The microchannel phase change cooling structure 41 of the integrated cooling cover 4 ensures that the sealing surface temperature does not exceed 95°C under extreme heat flux density, effectively preventing the influence of high temperature on the sealing performance. This connection system has excellent sealing performance, reliable high-temperature resistance and convenient maintenance characteristics, and is suitable for complex application scenarios such as petrochemicals and forest fires.

[0044] The implementation principle of the firefighting robot drive shaft sealing structure in this embodiment is as follows: through the combined use of a gradient composite drive shaft 1, a ceramic-based bearing seat 2, a three-stage sealing assembly 3, and an integrated cooling cover 4, an efficient seal is achieved at the connection between the drive shaft and the vehicle body. The gradient composite drive shaft 1 provides high strength and wear resistance, the ceramic-based bearing seat 2 provides high precision and heat resistance, the three-stage sealing assembly 3 provides multiple protections, and the integrated cooling cover 4 provides heat dissipation. The overall structural design is rational, the performance is excellent, and it can meet the needs of firefighting robots in extreme environments.

[0045] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A high-temperature resistant fire-fighting robot drive shaft sealing structure, characterized by: The invention comprises a gradient composite drive shaft (1), a ceramic-based bearing seat (2), a three-stage sealing component (3) and an integrated cooling cover (4); the gradient composite drive shaft (1) passes through the ceramic-based bearing seat (2) and is fixedly connected to the vehicle body connection component by means of threads or interference fit; the three-stage sealing component (3) comprises, from the inside to the outside, a magnetically controlled shape memory alloy main sealing layer (31), a bionic vortex air film secondary sealing layer (32) and a piezoelectric active compensation layer (33); the magnetically controlled shape memory alloy main sealing layer (31) is nested between the gradient composite drive shaft (1) and the ceramic-based bearing seat (2), the bionic vortex air film secondary sealing layer (32) is arranged on the outer surface of the ceramic-based bearing seat (2), the piezoelectric active compensation layer (33) covers the outer side of the bionic vortex air film secondary sealing layer (32), and the integrated cooling cover (4) is arranged on the outer side of the piezoelectric active compensation layer (33).

2. The high-temperature resistant fire-fighting robot drive shaft sealing structure according to claim 1, characterized in that: The gradient composite drive shaft (1) comprises a nitrided steel substrate (11) and a laser cladding coating (12), wherein the coating (12) has a thickness of 0.3 mm and a surface hardness of HV1100; radial positioning is achieved between the gradient composite drive shaft (1) and the ceramic-based bearing seat (2) through an interference fit, and axial positioning is achieved through an end face stop (13).

3. The high-temperature resistant fire-fighting robot drive shaft sealing structure according to claim 1, characterized in that: The ceramic-based bearing seat (2) is made of a ceramic-based composite material, has an inner hole taper of 1:15, and an interference fit of 0.02-0.03 mm; and the inner hole surface of the ceramic-based bearing seat (2) is provided with a micron-level roughness treatment.

4. The high-temperature resistant fire-fighting robot drive shaft sealing structure according to claim 1, characterized in that: The magnetically controlled shape memory alloy main sealing layer (31) comprises a shape memory alloy ring (311) having a phase transition temperature of 150° C., a double-layer structure gap of 0.1 mm, and is filled with magnetic fluid; the shape memory alloy ring (311) is nested in the inner hole of the ceramic-based bearing seat (2) through thermal expansion.

5. The high temperature resistant fire fighting robot drive shaft sealing structure according to claim 1, characterized in that: The bionic vortex air film secondary sealing layer (32) comprises a double-headed spiral groove (321) with a groove depth of 0.1 mm and a spiral angle of 30°; the double-headed spiral groove (321) is formed on the outer surface of the ceramic-based bearing seat (2) through precision machining.

6. The high temperature resistant fire fighting robot drive shaft sealing structure according to claim 1, characterized in that: The piezoelectric active compensation layer (33) comprises a 64-partition PZT-5H ceramic array (331), and a flatness adjustment error is less than 0.5 μm; the piezoelectric active compensation layer (33) is fixed to the outer side of the bionic vortex air membrane secondary sealing layer (32) by an adhesive.

7. The high temperature resistant fire fighting robot drive shaft sealing structure according to claim 1, characterized in that: The integrated cooling cover (4) comprises a microchannel phase change cooling structure (41), and the integrated cooling cover (4) is fixed to a vehicle body connection assembly by means of bolts.

8. The high temperature resistant fire fighting robot drive shaft sealing structure according to claim 1, characterized in that: It also includes a quick-release interface (5), which fixes the integrated cooling cover (4) on the vehicle frame and includes 8 hydraulic locking pins (51). The hydraulic locking pins (51) are driven by hydraulic pressure to achieve rapid locking and unlocking of the vehicle body connection assembly.

9. The high temperature resistant fire fighting robot drive shaft sealing structure according to claim 1, characterized in that: The integrated cooling cover (4) is provided with fiber optic Bragg grating sensors (42) arranged at 8 points in a circumferential direction for real-time monitoring of sealing surface temperature and strain; the fiber optic Bragg grating sensors (42) are embedded in the interior of the integrated cooling cover (4) and are led out to external monitoring equipment via optical fibers.

10. A firefighting robot drive shaft and vehicle body connection system, comprising the drive shaft sealing structure according to any one of claims 1 to 9 and a vehicle body, characterized in that: The vehicle body connection assembly is mounted in cooperation with the ceramic-based bearing seat (2) via bolts or buckles.

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