33results about How to "Reduce load requirements" patented technology

The invention discloses a three-degree-of-freedom series-parallel hybrid humanoid robot waist structure, and relates to the technical field of robots. The defects that an existing multi-degree-of-freedom waist structure is not compact enough, limited in precision, low in rigidity and poor in stability are overcome. The robot comprises a yaw joint mechanism and a pitching-sidesway joint mechanism which are connected in series, upper limbs and legs of the robot are connected through the yaw joint mechanism and the pitching-sidesway joint mechanism, and the yaw joint mechanism can drive the upper limbs of the robot to do yaw motion; the pitching-sidesway joint mechanism comprises a movable platform, a static platform, a joint universal joint and two joint driving assemblies, the movable platform is fixedly connected with the upper limbs of the robot, the static platform is fixedly connected with the legs of the robot, the joint universal joint is connected with the movable platform and the static platform, and the two joint driving assemblies are symmetrically arranged on the left side and the right side of the joint universal joint; and the two joint driving assemblies are connected with the movable platform and the static platform correspondingly, and when the two joint driving assemblies drive the movable platform, the movable platform can do pitching motion and / or side-sway motion around the joint universal joint.

The invention provides a circular pipeline laminar flow calculation method and system and a water supply and heat supply measuring device.The method comprises the steps that cylindrical fluid infinitesimal elements which are coaxial with a circular pipeline and equal to the circular pipeline in length are taken from the circular pipeline, and stress analysis is conducted on the cylindrical fluid infinitesimal elements to obtain a shear stress expression on the side wall of the cylindrical fluid infinitesimal elements; obtaining a differential relation between the speed and the radius according to a shear stress expression and a Newton internal friction law; integrating the differential relation according to the inner radius of the circular pipeline and the velocity of the fluid mass point on the inner wall of the circular pipeline to obtain velocity distribution; and calculating the flow based on the speed distribution according to the inner radius and the length of the circular pipeline, the pressure on the two end surfaces and the viscosity and the density of the fluid. According to the technical scheme, the technical problems that in the prior art, due to the fact that a large number of flow meters are additionally connected in long-distance pipeline transportation, the load of a transportation power source is increased, and measurement of water meters and heat meters in the water supply and heating field is inaccurate are solved.

The utility model discloses a hoisting feeding device and a feeding system, and relates to the field of feeding facilities, the hoisting feeding device is used for feeding to a feeding port, and the hoisting feeding device comprises at least two sets of track supports which are arranged at intervals along the arrangement track of the feeding port, the track support comprises a stand column used for being fixed to a building foundation and a mounting beam fixed to the stand column and extending to the position above a feeding port arrangement track. The hanger rail is arranged according to the arrangement track of a feeding port and is fixed on each mounting beam; and the walking hoisting mechanism is mounted on the hoisting rail and can hoist materials along the hoisting rail. A single-side supporting structure is formed through the rail support, the hanger rail and the walking hoisting mechanism are used as a hoisting and feeding execution body, compared with a traveling hoisting system, the overall structure is light, the requirements for bearing and the structure of the installation environment are low, interference with the surrounding environment is not likely to happen, and all-directional covering of all feeding ports is easy to achieve; and the application scene is wider.

The utility model relates to the technical field of container lifting, in particular to a container lifting appliance for detecting the direction of a container door, which comprises a lifting appliance body for lifting a container, the container is provided with a first side plate and a second side plate, the first side plate is provided with the container door, and corner castings are respectively arranged at four corners above the container; a lock head corresponding to the corner casting is rotationally connected to the lifting appliance body, a driving assembly for driving the lock head to rotate is arranged on the lifting appliance body, first detection rods are slidably connected to the two ends, corresponding to the length direction of the container, of the lifting appliance body correspondingly, and the distance between the first detection rods is larger than the distance between the first side plate and the second side plate. The first detection rods are in transmission connection with first sensors. The orientation of the box door is detected through whether the first detection rod and the second side plate are pressed or not, the box door orientation detection device has the advantages of being simple and direct in structure and accurate and reliable in detection, and the orientation of the box door can be simply, conveniently and accurately detected.

The present invention discloses an integral sliding tool and method for a lower cross beam of a quay crane and a trolley travel assembly, comprising a pad beam, an anti-tilt leg, a cantilever beam, a lifting device, a sliding device and an MGE slider; the pad beam is arranged directly below the lower cross beam; the cantilever beam is arranged above the pad beam and connected to the lower cross beam; the upper end of the anti-tilt leg is connected to the pad beam, and the lower end is connected to the MGE slider, and the MGE slider cooperates with the upper surface of the pad beam; the lifting device is arranged on the upper surface of the pad beam to lift the cantilever beam; the sliding device is arranged on the upper surface of the pad beam and connected to the anti-tilt leg. The present invention solves the problem that the existing trolley and the lower cross beam are difficult to shift, and ensures the smooth shifting of the trolley and the lower cross beam.

The utility model relates to the technical field of greenhouses, and provides a greenhouse environment mobile acquisition device which comprises an environment acquisition device. The track is arranged at the top of the greenhouse in the first direction, a plurality of collection point positions are arranged on the track at intervals, and each collection point position is provided with a position detection component; the transmission part is movably arranged on the track, is connected with the environment acquisition device and is used for driving the environment acquisition device to move on the track in the first direction and staying at each acquisition point position to complete environment information acquisition; the driving device is in transmission connection with the transmission part and used for driving the transmission part to move in the first direction; the controller is electrically connected with the driving device and used for controlling starting and stopping of the driving device; according to the utility model, greenhouse space utilization is optimized, dynamic coverage is realized with less equipment, data is closer to actual environment distribution, and greenhouses with different areas can be flexibly adapted.

The present invention provides a stacked satellite rocket clamping and releasing mechanism, including: a clamping mechanism, a base, a transfer mechanism, a thrust mechanism and an unlocking mechanism. The unlocking mechanism includes: a plurality of flexible strips and an unlocker. The installation body of the release device is the base, and a plurality of stacked satellites are neatly stacked and placed on the base. At least two sets of the release devices provided by the present invention are symmetrically arranged around the stacked satellite. The larger clamping force required by the clamping mechanism is provided by the smaller pulling force of the flexible strips of the transfer mechanism through the force amplification of the transfer mechanism. The impact between the impact power source and the clamped target is buffered by multiple places such as the flexible strips, the transfer mechanism, and the clamping mechanism. One unlocker can be used to unlock multiple clamping mechanisms, and there is no need to set an unlocker at each clamping mechanism. The release device provided by the present invention has a small spatial envelope, low load-bearing requirements for the unlocker, small unlocking impact, and a small number of unlockers required, and can achieve the clamping and release of multiple targets stacked vertically.

The invention discloses a roof assembly part of a transformer substation and an assembly type roof, and relates to the technical field of roof construction. The roof assembly part comprises a bottom plate, an inner core structure, a first connecting structure, a second connecting structure and a panel; wherein a mounting position is formed on the bottom plate; the inner core structure comprises a waterproof layer and a heat preservation layer which are sequentially arranged from top to bottom, and the heat preservation layer is installed at the installation position; the first connecting structure and the second connecting structure are arranged at the two ends, in the transverse direction, of the inner core structure correspondingly, the first connecting structure and the second connecting structure are both installed at the installation position, the first connecting structure is used for being connected with the second connecting structure of another roof assembly part, and the second connecting structure is used for being connected with the first connecting structure of another roof assembly part; and the panel covers the tops of the waterproof layer, the first connecting structure and the second connecting structure. According to the roof assembly part, the construction efficiency of roof construction can be improved, and the construction period is shortened.

The invention relates to a large current generating device and current transformer verification equipment, and relates to the field of extra-high voltage power supply equipment, and the large current generating device comprises a three-phase rectification unit, an IGBT full-bridge conversion unit, an isolation conversion transformer, a rear-end capacitance compensation unit and a control feedback unit. The three-phase rectification unit can convert three-phase alternating current into direct current, the IGBT full-bridge conversion unit is connected with the three-phase rectification unit and can convert the direct current into single-phase alternating current, and the input end of the isolation conversion transformer is connected with the IGBT full-bridge conversion unit and can increase the current of the single-phase alternating current and output large-current alternating current. The rear-end capacitance compensation unit is connected to the output end of the isolation conversion transformer to improve the power factor of the large-current alternating current, and the control feedback unit is arranged between the output end of the isolation conversion transformer and the IGBT full-bridge conversion unit, so that the output current can be improved, and the weight and the cost of the device can be reduced.

The invention belongs to the technical field of photovoltaic power generation, and provides an integrated power generation panel and a production method thereof.The integrated power generation panel comprises a plurality of power generation panels, and each power generation panel is of a stacked structure; the laminated structure comprises a front plate, a first packaging adhesive film, a battery string, a second packaging adhesive film, an insulating layer, a third packaging adhesive film and a rear plate which are laminated in sequence; bending parts are arranged on the two sides of the rear plate; when the power generation panels are integrated, the adjacent power generation panels are in lap joint through the bending parts. According to the power generation panel, a color steel tile roof and a building wall surface are directly replaced by the rear plate, meanwhile, a corrugated structure is arranged, the power generation panel has the technical characteristics of being convenient and fast to install, safe and durable in structure, resistant to impact, waterproof, fireproof, beneficial to later maintenance and the like, and the panel is low in overall investment cost, short in recovery period, attractive in appearance, simple in process and capable of being industrially popularized.

The utility model belongs to the field of tower drum transportation, and discloses a split type wind power tower drum loading and transporting tool which comprises a base installed on a transporting vehicle and a supporting assembly installed on the base and used for fixing a tower drum. The supporting assembly comprises a supporting plate and at least one positioning piece arranged on the front face of the supporting plate. Supporting arms extending out of the top plane of the supporting plate are arranged at the two ends of the supporting plate, and a plurality of fixing holes connected with a tower drum flange through bolts are formed in the supporting arms. The positioning piece comprises a locking seat welded to the front face of the supporting plate, a locking pin arranged on the side face of the locking seat and a positioning pin arranged at the bottom of the locking seat, the locking seat is provided with an insertion hole matched with the positioning pin, and the positioning pin is provided with a limiting groove connected with the locking pin in an inserted mode; the two supporting assemblies are connected in an inserted mode through the positioning pins and the locking seats to be connected in a stacked mode. The tower drum transport vehicle is simple in structure and reasonable in design, a plurality of tower drums can be stacked on the transport vehicle, and the stability of the tower drums can be guaranteed.

The utility model relates to the technical field of building construction, and discloses a large-area hollow brick wall slurry-free wall building structure which comprises a concrete wall body and mounting plates arranged on the upper side and the lower side of the inner wall of the concrete wall body and further comprises a plurality of first mounting pipes and first mounting rods which are arranged on the tops of the mounting plates below the inner wall of the concrete wall body. A plurality of second mounting pipes and second mounting rods are arranged at the bottom of the upper mounting plate; the hollow window is derived from an ancient hollow window, the wall building operation can be completed without waiting for mortar solidification, the construction speed can be greatly increased, the use of mortar is reduced, the resource consumption is reduced, meanwhile, construction waste generated in the construction process is reduced, environmental protection is facilitated, and the construction cost is reduced. In addition, the structure can keep the attractiveness of the wall bricks, pollution and damage of mortar to the wall face are reduced, the overall weight of the wall body is reduced, the load requirement for a foundation structure is lowered, and certain convenience is brought to building design and construction.

The present application relates to a combined cofferdam and a cofferdam module that is easy to splice. The cofferdam module includes a cofferdam box, a first locking joint and a second locking joint. The second end of the cofferdam module located above is plugged into the plug-in space of the plug-in unit of the cofferdam module located below and limitedly matched, and each cofferdam module is spliced ​​up and down to form a cofferdam module. After a cofferdam module is lowered, the cofferdam module of another cofferdam module and the cofferdam module of the adjacent cofferdam module are plugged together through the first locking joint and the second locking joint to splice into a combined cofferdam. No welding is required during the splicing process, and the size and weight of each cofferdam module are small, and the load-bearing requirements for the lifting equipment are low. When dismantling, it is only necessary to lift the cofferdam modules one by one, and then disassemble the cofferdam modules of the cofferdam module through the plug-in unit and the matching parts. No cutting is required during the disassembly process. The structure of the cofferdam module after dismantling is complete, which effectively improves the construction efficiency and reduces the construction cost.

The utility model relates to the technical field of conveying devices, in particular to a belt conveying tail end transfer device. A belt conveying tail end transferring device comprises a material taking executor, a material conveying belt, a material conveying belt, a material conveying belt, a material conveying belt, a material conveying belt, a material conveying belt and a material conveying belt, and is characterized in that the material taking executor is a suction cup, and the suction face is arranged on the front side of the outer end; the material taking actuator is connected to the moving part, the moving part comprises a lifting assembly, the lifting assembly comprises a mounting plate, the lifting assembly is used for driving the material taking actuator to move in the direction perpendicular to the conveying direction of the conveying belt, a second limiting structure is arranged on the mounting plate, and the second limiting structure is used for limiting the material taking actuator to move in the direction perpendicular to the conveying direction of the conveying belt. The second limiting structure is used for preventing the material taking actuator from rotating downwards to be over-position, and when the material taking actuator rotates to be attached to the second limiting structure, the included angle between the suction face of the material taking actuator and the horizontal plane is a preset acute angle. And the materials do not need to be wholly lifted during material taking, and deformation of outer packages is not prone to being caused.

The invention relates to the technical field of noise control, in particular to a cable-supported sound insulation barrier. The sound insulation screen comprises side sound insulation screens arranged on the two sides of a road and a bridge and further comprises a top sound insulation screen arranged above the road and the bridge, the top sound insulation screen comprises a bearing cable net, a main frame, side frames and sound insulation plates, the main frame comprises main stand columns and main beams, and the main stand columns are arranged in the middle of the road and the bridge at intervals in the longitudinal direction of the road and the bridge; the girders are fixedly arranged at the upper parts of the main upright posts along the longitudinal direction of the road bridge; the side frame comprises side stand columns and side beams, the side stand columns are fixedly arranged on the edges of a road bridge at intervals in the longitudinal direction of the road bridge, and the side beams are fixedly arranged on the tops of the side stand columns in the longitudinal direction of the road bridge. The bearing cable net comprises a plurality of main inhaul cables, the main inhaul cables roughly extend in the transverse direction of the road bridge, the two ends of each main inhaul cable are fixed to the corresponding main beam and the corresponding edge beam respectively, the main inhaul cables are arranged at intervals in the longitudinal direction of the road bridge, and the sound insulation plates are arranged on the bearing cable net. The method can be widely applied to noise control projects in the traffic and transportation fields such as highways, railways, subways and high-speed rails.

The invention discloses a fine adjustment mechanism for the spatial intersection degree of a rotating shaft of an antenna rotary table, relates to the field of antenna housing testing, and aims to solve the problem that more accurate adjustment is difficult to realize due to the fact that only a small amount of adjustment can be realized in X and Y directions in the conventional mode. The fine adjustment mechanism comprises a fine adjustment mechanism main body assembly which comprises an X-direction adjusting seat, an azimuth base, an azimuth adjusting seat and a pitching adjusting seat; one end face of the X-direction adjusting seat is connected with the front-back telescopic assembly, and the other end face of the X-direction adjusting seat is provided with an orientation base capable of moving along the X-direction adjusting seat. An azimuth adjusting seat capable of moving along the azimuth base is arranged on the end surface, far away from the X-direction adjusting seat, of the azimuth base; an elevation angle adjusting seat capable of moving along the azimuth adjusting seat is arranged on the end surface, far away from the azimuth base, of the azimuth adjusting seat; the end face, away from the azimuth adjusting seat, of the pitching adjusting seat is connected with the antenna rotary table. Fine fine adjustment of four degrees of freedom of X direction, Y direction, orientation and pitching is realized, and the technical problem in the field is solved.

This invention provides a SCARA robotic arm, characterized by comprising: a movable base, at least two articulated arms, and articulated motors disposed at each articulated arm; the movable base is sequentially connected to each articulated arm; each articulated motor is a planetary gear motor, and each articulated motor is rigidly directly connected to a follower structure via coaxial bearings; an end effector is mounted on the end articulated arm. This invention, by selecting an integrated articulated motor with a planetary reducer as the drive unit, enables the joint output to achieve high torque and sufficient speed without the need for external multi-stage reduction links, directly increasing the output capacity per unit volume on the drive side, thereby reducing the need for additional structural and transmission components to meet dynamic performance requirements. The rigid direct connection scheme between the articulated motor and the follower structure shortens the power transmission path, reduces backlash and flexibility introduced by components such as synchronous belts / linkage mechanisms, and lowers phase lag and energy loss.

The invention relates to the technical field of unmanned aerial vehicle power distribution, and particularly discloses a hybrid power unmanned aerial vehicle power distribution device and method, and the device comprises an energy management module which comprises an energy management computer, a pair of battery management units, and a pair of generator controllers; the pair of bus bars are used for collecting energy output by the pair of high-voltage battery packs and the pair of generators, the two bus bars are connected through a first contactor, and each bus bar is provided with a plurality of load interfaces; the load management module comprises a plurality of load management units, the input end of each load management unit is connected with one load interface, and the output port of each load management unit is connected with one load; and the communication module is respectively connected with the flight management computer and the electric load through a communication bus. The generator is used as a main power supply, the bus voltage is maintained through voltage stabilization control of the generator controller, and the high-voltage battery pack is used as a current following assembly, so that the stability of the bus voltage is ensured, and the quick response characteristic of the high-voltage battery pack can be reasonably utilized.

This invention provides a composite steel plate comprising a base layer and a cladding layer on top of the base layer. The composite steel plate has a thickness of 60-120 mm, the cladding layer is made of stainless steel, the base layer is made of carbon steel, and the bond strength between the base layer and the cladding layer is above 500 MPa. The composite steel plate of this invention exhibits excellent tensile properties, low-temperature impact resistance, and interlayer bonding performance. This invention also provides a method for preparing the above-mentioned composite steel plate.

The utility model discloses a return air duct structure with an adjustable inner support frame, which comprises a plurality of return air duct units arranged in sequence, each return air duct unit comprises a rubber and plastic air duct body, a support frame and a hoisting component, and the corresponding ends of any two adjacent rubber and plastic air duct bodies are connected through an annular zipper. The supporting frame is arranged in the rubber and plastic air pipe body and comprises a plurality of square frame bodies which are sequentially arranged at equal intervals in the length direction of the rubber and plastic air pipe body, and every two adjacent square frame bodies are fixedly connected through a longitudinal connecting rod. The square frame body is formed by connecting two transverse rods and two telescopic vertical rods. The rubber and plastic air pipe body is provided with two hoisting assemblies and is installed and connected to the top of a building through the hoisting assemblies. The height of the supporting frame can be adjusted, the supporting frame can be easily installed in the rubber and plastic air pipe body, the rubber and plastic air pipe body is supported and keeps certain tension, installation is fast and labor-saving, and the hidden danger of pipeline damage in the installation process is eliminated.

The invention discloses a supporting rod type modular air building machine, and belongs to the technical field of building construction. The building machine mainly comprises a supporting system, a steel platform system, a hanging frame system and a power and control system, the supporting system adopts a steel pipe pre-buried in a building structure as a supporting rod, a cross-core jack cylinder body is fixed to the steel platform and sleeved with the supporting rod, and a jack climbs along the supporting rod to achieve overall lifting of the platform. The steel platform system is formed by assembling three kinds of steel truss standard units and cross-shaped connecting pieces through female head structures and male head structures and can be divided into a first connecting area, a second connecting area and a third connecting area according to positions and functions. The hanging frame system is formed by assembling a hanging rod, a walkway plate and a punching protective net, and component standardization and on-site dry type assembly are achieved. High standardization and on-site welding-free rapid assembly of components are achieved, the supporting structure is simple, stress is clear, safety and reliability are achieved, and the supporting structure has the advantages of being rapid to assemble and disassemble, high in adaptability, capable of being recycled and reused and low in comprehensive cost.

The chuck of the pipe cutting machine comprises a fixing frame of a frame structure, a first set of clamping assemblies and a second set of clamping assemblies, the fixing frame is of a disc structure and comprises a first installation disc, a second installation disc and at least two partition plates, the first installation disc is arranged on the front side of the second installation disc, and the second installation disc is arranged on the front side of the second installation disc. The partition plate is vertically fixed between the first mounting disc and the second mounting disc, the first mounting disc and the second mounting disc are coaxially mounted, the first clamping assembly clamps the left end and the right end of the pipe in the second through hole, and the second clamping assembly clamps the upper end face and the lower end face of the pipe in the second through hole; the pipe clamping position of the first clamping assembly and the pipe clamping position of the second clamping assembly are staggered front and back. According to the chuck of the pipe cutting machine, the structural layout is compact, driving of clamping and positioning of pipes is simplified through the modular design of the two sets of bidirectional driving air cylinders, installation is convenient, and meanwhile it can be guaranteed that troubleshooting and maintenance are more convenient and faster.

The present invention discloses a lightweight PV / T hot water-air composite component, which belongs to the field of comprehensive utilization of solar photovoltaic and thermal energy, and comprises a non-glass transparent cover plate, a photovoltaic cell, a hot melt adhesive film, a transparent back plate, a heat-absorbing metal plate, a metal tube, a wavy perforated heat-conducting sheet, a heat-insulating back plate and a heat-insulating frame; a plurality of photovoltaic cells are arranged in a matrix array; the non-glass transparent cover plate and the transparent back plate are respectively arranged at the upper and lower ends of the photovoltaic cell to form a photovoltaic component; the wavy perforated heat-conducting sheet and a plurality of metal tubes are arranged on the back of the heat-absorbing metal plate to form a heat-absorbing plate core; the photovoltaic component is arranged on the front of the heat-absorbing metal plate to form a photovoltaic-thermal integrated component; the photovoltaic-thermal integrated component is packaged with the heat-insulating back plate and the heat-insulating frame; the present invention can significantly reduce the weight of the component and reduce the difficulty of installation; enhance the multifunctional characteristics of the PV / T technology and expand its applicable scenarios; improve the heating efficiency of the air and the cooling efficiency of the photovoltaic cell.

The present invention relates to the field of buckling restraint technology, specifically, a steel-wood self-resetting buckling restraint support device, wherein a steel plate 2 is installed on the inner surface of the stiffening rib unit, a yield unit is arranged on one end surface of the cross-shaped steel 1, and a reset unit is arranged on the outer surface of the yield unit. The spring in the reset unit is compressed, and the slide rod is also compressed to drive the piston to move. The shock-absorbing oil in one chamber of the cavity 2 enters the other chamber of the cavity 2 from the one-way valve 1, and the excess shock-absorbing oil enters the cavity 3 from the through hole 4 by opening the one-way valve 4. When the spring is forced to restore its length, the piston also moves. The oil in the other chamber of the cavity 2 and the cavity 3 respectively flows to the one chamber of the cavity 2 through the one-way valve 1 and the one-way valve 4. When facing a large earthquake, it can yield, and after yielding and compressive deformation, the device can be reset.

The utility model provides a small -size screw rod oil press, and technical key points include: tubular press hole and press bar that coaxially is arranged in press hole, press bar has the stress section that protrudes the press hole tail end in axial direction, stress section has the limiting part that is in abutment with press hole to limit press bar axial displacement and can axial adjustment limiting position, still movably clamps the thrust bearing that is used for reducing the frictional force of rotation between limiting part and press hole, the wall of press hole is close to tail end and has the slag hole of radial slagging. Only need to adjust the axial limiting position of limiting part, can adjust the clearance between press bar and press hole, not only can be applicable to different oil material, but also can make up the clearance that increases because of abrasion, prolongs the life. The axial stress between press bar and press hole is mutually offset during pressing and can reach dynamic balance, not only can save the structure for fixed press hole or press bar, but also the load requirement of motor is lower, has reduced the cost, and the dismounting and cleaning are very simple.

The invention discloses a high-power wall-climbing robot laser cleaning machine and a working method thereof. The cleaning machine comprises a main machine, a wall-climbing robot and a laser cleaning head. The main machine comprises a container, an unmanned vehicle, a laser generating system, a circulating cooling system, a pneumatic system, a sensing system, a control system and a pressure stabilizing system. The laser generating system is connected with the laser cleaning head through an optical fiber; the circulating cooling system is connected with the laser generating system and the laser cleaning head; the pneumatic system is connected with the laser cleaning head; a sensor of the sensing system is installed on the wall-climbing robot, a sensing controller is installed in the container, and the sensing controller is electrically connected with the control system. The control system is installed in the container and electrically connected with the laser generating system, the circulating cooling system and the pneumatic system. The pressure stabilizing system is mounted in the container and is electrically connected with the control system; the container is in hard connection with the unmanned vehicle; the wall-climbing robot is in hard connection with the laser cleaning head. Through the content, the laser rust removal efficiency is improved, and the reliability of equipment is improved.

The invention discloses a multi-layer different-speed air cushion wall type air cushion rotor supporting device, which is characterized in that the side surface of an air cushion chamber of an air cushion device forms a multi-layer air cushion wall by a fixed air cushion wall and a rotating air cushion wall, the rotating air cushion wall forms different rotating speeds by a rotating speed control device, and contact type rotating sealing devices are arranged among the multi-layer air cushion wall; by controlling the rotating speed difference between the adjacent air cushion walls, the linear speed of the contact type rotary sealing device can be always in an allowable range, and the linear speed of the outer side of the hovering disc is finally achieved through multi-layer speed stacking, so that the contact type rotary sealing device is safely and efficiently used in the environment that the air cushion supports a high-speed rotor.