488 results about "Axial thrust" patented technology

The invention provides a valve actuator full life cycle intelligent test system and method. The system comprises a combined load generation module used for generating an initial dynamic proportion of axial thrust and radial disturbance force according to a test protocol instruction, simulating a comprehensive stress state of an actuator under the impact of a pipeline medium, and outputting mechanical data containing thrust fluctuation characteristics in real time; the environment coupling module is used for dynamically adjusting an environment stress condition according to the test protocol instruction; the digital twinborn analysis module is used for comparing the actual displacement track of the actuator with the theoretical model track through a space-time alignment algorithm according to the mechanical data and environmental stress conditions to obtain a deviation feature vector; and the intelligent diagnosis module is used for carrying out dynamic time warping matching on the basis of the deviation feature vector and a preset historical fault database, outputting a fault type identification code and confidence, and generating a test report. According to the scheme, the accuracy of accurate evaluation of the full life cycle state of the valve actuator is improved.

The invention discloses an electromagnetically-supported hybrid magnetic thrust bearing structure and a suspension force design method, and provides a hybrid magnetic bearing structure design in which radial alternate magnetization is adopted in the axial direction, a permanent magnet bearing formed by stacking multiple layers of magnetic rings bears all axial thrust loads, and radial electromagnetic bearings are assisted at the two ends to maintain dynamic stability of a rotor. The performance requirements of high bearing capacity, low power consumption, good active control capability and high dynamic stability of the hybrid magnetic thrust bearing in a limited space are met; in order to solve the problems that an inner magnetic ring and an outer magnetic ring are not strictly centered due to the influence of machining precision, an assembly process, rotor eccentricity and the like during actual operation of a permanent magnet thrust bearing, additional unbalance load, dynamic unbalance load and the like are generated in the radial direction. The electromagnetic supporting suspension force design method comprehensively considers the radial unbalance load of the permanent magnet thrust bearing, the dynamic unbalance load of the rotor and the self-weight influence, effective calculation of the suspension force of the supporting rotor is achieved, and important technical support is provided for the hybrid magnetic thrust bearing structure and suspension force design iteration.

The invention relates to a magnetic suspension air separation expansion machine system and an operation method thereof. The system comprises a base, a magnetic suspension bearing assembly, a rotor assembly and a control module. The magnetic suspension bearing assembly is arranged on the base, comprises an expansion end radial magnetic suspension bearing, a brake end radial magnetic suspension bearing and an axial thrust magnetic suspension bearing, and is used for supporting radial and axial forces of the rotor assembly; the rotor assembly is arranged in the machine body and connected with the machine body through the magnetic suspension bearing assembly, and non-contact suspension is achieved. The control module is electrically connected with the magnetic suspension bearing assembly and used for controlling the magnetic suspension bearing assembly to suspend the rotor. The operation method comprises the steps of self-checking before starting, electrifying to suspend the rotor, starting the air compressor to pressurize, adjusting flow to drive the expansion impeller, carrying out split-flow cooling on gas, and collecting data in real time to maintain stable suspension of the rotor. The device has the advantages of high efficiency, stability, energy conservation and the like and is suitable for the field of air separation.

A method of assembling a delivery payload assembly configured to be deployed from an aircraft and travel along a flight path to a predetermined landing destination includes attaching a tail-kit assembly to a first end of a payload, the tail-kit assembly including a rotor blade assembly including a plurality of rotor blades having a central axis of rotation, and a flight control and navigation system configured to control a collective pitch angle of each of the plurality of rotor blades of the rotor blade assembly, configured to control an axial thrust force of the rotor blade assembly, the axial thrust force being at an angle with respect to the central axis of rotation of the rotor blade assembly, and configured to navigate the delivery payload assembly along the flight path to the predetermined landing destination. The method further includes removing the tail-kit assembly from the payload after the payload is delivered to the predetermined landing destination.

A centrifugal pump shutdown sealing device based on axial thrust comprises a pump cover (1) and an annular plate (11), an inner cylinder (3) and an outer cylinder (5) are connected between the pump cover and the annular plate in a sealed mode, an inner corrugated pipe (4) and an outer corrugated pipe (8) are welded between the sections of the inner cylinder and between the sections of the outer cylinder respectively, a water injection port (6) is formed in the outer cylinder, and a guide rod (7) penetrates through the annular plate and is fixedly connected to the pump cover. The right end of the guide rod is sleeved with a spring (10) and screwed with an adjusting nut (11), the left side of the annular plate is connected with a rubber annular plate (13), a shaft sleeve (14) is fixed to the pump shaft, and the rubber annular plate can be attached to the right end face of the shaft sleeve. The sealing device has the advantages that all the components are installed on the pump cover, the load of the pump shaft is reduced, unbalanced force cannot be generated on the pump shaft, the sealing device is not prone to being damaged when the machine stops, and no adverse effect is generated on the pump shaft. When the centrifugal pump works, the rubber ring plate on the ring plate is separated from the shaft sleeve, and when the centrifugal pump stops, the rubber ring plate is tightly attached to the shaft sleeve.

The invention provides a wheel-paddle integrated multi-mode land-air amphibious transformation robot, and relates to the technical field of aerial robots, the robot comprises a robot main body, and the robot main body is used for controlling the robot to realize land-air amphibious transformation, air flight and land walking; the wheel-paddle integrated mechanism is formed by combining two parts, namely a land walking mechanism and an air flying mechanism; the mechanical arms are connected to the four corners of the robot body, and the other ends of the mechanical arms are connected with the wheel-paddle integrated mechanism through servo push rod mechanisms. The deformation mechanism adopts a bistable locking mechanism driven by a servo electric push rod, a stable mechanical self-locking mechanism is constructed while the axial thrust of the push rod is kept, conversion between a flight folding state and a ground supporting state can be completed only through instantaneous driving, the wheel-propeller integrated mechanism adopts a propeller and protective driving wheel composite structure design, and the structure is simple and convenient. And a power decoupling system of the non-rotating core module and the rotating execution mechanism is constructed.

The invention relates to a high-thrust rocket engine full-system test run frame and application thereof. The test run rack is used for hot test run of a rocket engine, can bear large thrust, and ensures the stability in the test process and the accuracy of data acquisition. The test run frame comprises a foundation embedded part, a square frame beam supporting structure, a C-shaped support, a movable frame and a pre-tightening force device. The foundation embedded part comprises a plurality of groups of anchor plates, straining beams and connecting bases, the number of the connecting bases is equal to that of the anchor plates, one group of anchor plates and the corresponding group of connecting bases connected to the anchor plates form an anchor pile, the adjacent anchor piles are sequentially connected through the straining beams to form the U-shaped foundation embedded part, and enough pulling resistance can be provided; the square frame beam supporting structure supports the whole test run rack through the stand columns and the force bearing beams, and the detachable stand columns can accurately adjust the height of an engine. And the C-shaped bracket is used for fixing and calibrating a movable frame part of the engine. The structure can bear the axial thrust of 12500 kN, and is stable in structure and easy to disassemble and replace.

Disclosed in the present application are an automatic roll replacing device, and winding equipment. The automatic roll replacing device includes: a mounting frame; an unwinding mechanism, including an unwinding shaft rotatably connected to the mounting frame around its own axis; a spare material mechanism, including a spare material shaft having a contact end and a material pushing member providing an axial pushing force for a spare material roll on the spare material shaft, the spare material shaft being rotatably connected to the mounting frame around the rotation axis, and the material pushing member being controlled to push the spare material roll on the spare material shaft to transfer to the unwinding shaft; and a strip connection mechanism, provided on the mounting frame, and used for cutting off a work material strip unwound from the unwinding shaft and connecting the cut-off work material strip to the spare material roll.

The invention discloses an automatic assembling mechanism for railway track fastener nuts, and belongs to the technical field of automatic assembling equipment. The mechanism comprises a mechanical arm, a nut assembling mechanism, a power transmission device, a propelling device, a connecting seat and a visual device, the nut assembling mechanism is composed of a compliant device and a magnetic attraction device, the tail end of a mechanical arm is fixed through a connecting base, a visual device recognizes the position of a fastener in real time and guides the mechanical arm to be positioned, a servo motor transmits torque through a speed reducer and a telescopic universal connecting assembly, nut screwing is achieved, and the compliant device absorbs assembling errors and adapts to the posture. The magnetic attraction device is used for adsorbing and fixing the nut; the six-dimensional force sensor is used for monitoring and feeding back torque in real time; the control system is used for adjusting pre-tightening force; the propelling device is used for applying axial thrust; the device can realize automatic identification, positioning, tightening and pre-tightening control of the nut, and is suitable for various sleeper structures and complex track working conditions.

The invention provides a precise air floating main shaft based on small hole throttling. The precise air floating main shaft comprises a cylinder barrel, a shell, a rotating shaft, a front radial air floating bearing, a rear radial air floating bearing, a front axial thrust air floating bearing, a rear axial thrust air floating bearing, a driving motor, a broach mechanism and various sensors. A reciprocating type spiral groove is formed in the outer circle of the cylinder barrel and forms a spiral cooling water channel with the shell, and the rear end cover is integrated with an air inlet interface, an air outlet interface, a cooling water interface and an air control interface; compressed gas is throttled through an axial gas path and a small hole to form a high-rigidity gas film to support the rotating shaft, and cooling water flows in the spiral water path to take away heat; the control module is based on rotating speed, displacement, temperature and pressure signals, adopts a thermal-mechanical coupling model and a predictive control algorithm, adaptively adjusts air supply pressure and cooling water flow, and is suitable for semiconductors and ultra-precision machining equipment. Through the collaborative design of the small hole throttling air bearing, the reciprocating type spiral cooling water channel and multi-sensor intelligent control, the rigidity, the heat stability and the operation reliability of the main shaft are greatly improved, and the high-precision ultra-precision machining device is suitable for long-term high-rotating-speed and high-precision ultra-precision machining.

The invention provides a permanent magnet radial-axial collaborative balancing device and method for a shield pump, and belongs to the technical field of shield pumps. The device comprises a pump shell, an impeller, a rotor assembly, a stator assembly, a shaft, a thrust bearing, a rotor permanent magnet component and a static permanent magnet component, the rotor permanent magnet component and the static permanent magnet component correspond to each other, the rotor permanent magnet component is embedded below an impeller front cover plate opening ring, and the static permanent magnet component is embedded into the corresponding inner wall of the pump shell. The magnetization direction and the axis of the pump shaft form a preset inclination angle and are in mirror symmetry, so that a repulsive magnetic circuit with opposite same-name magnetic poles is formed; space magnetic force generated during working can be decomposed into radial and axial components. The radial component provides restoring force pointing to the center when the rotor deviates, and the radial stability is enhanced. The axial component counteracts the axial thrust of the fluid, and the thrust bearing load is reduced. External energy input is not needed, the structure is compact, vibration noise can be effectively restrained, and the service life of the bearing is prolonged.

The invention relates to the technical field of electro-hydraulic integrated driving, in particular to a hydraulic synchronous control system and method based on traveling wave and magnetic field composite driving, the system comprises a plurality of hydraulic cylinders, and each hydraulic cylinder comprises a piston rod assembly and a cylinder barrel; the piston rod assembly comprises a metal push rod on the inner layer, a three-phase winding module arranged around the metal push rod on the middle layer and a lining barrel on the outer layer. Each hydraulic cylinder corresponds to one pressure sensor, one displacement sensor and one controller. The cylinder barrel serves as a secondary conductor, eddy current is generated through traveling wave magnetic field induction, and axial thrust is generated. In a no-load state, the controller switches the current direction to generate auxiliary oil absorption thrust; during loading, current parameters are dynamically adjusted according to displacement, pressure and speed feedback, and synchronous compensation and speed regulation are achieved. The linear motor has the characteristics of high thrust density of a hydraulic system and quick response of the linear motor, and is suitable for high-precision engineering machinery and aerospace hydraulic actuating mechanisms.

The invention discloses a half-open type thrust magnetic levitation bearing. The bearing comprises a first magnetic ring, a second magnetic ring and a third magnetic ring, wherein the first magnetic ring, the second magnetic ring and the third magnetic ring are arranged in annular and laminating manners so as to form an annular magnetic pole; the magnetic pole of each of the magnetic rings is different from that of the adjacent magnetic ring; a first winding and a second winding of the annular magnetic pole are wound according to a predetermined half-open way, the lower part of the middle magnetic pole is recessed inwards so as to generate a winding space which meets predetermined conditions; and the magnetic pole arranged at the upper end extends, and thus, a complete circle of magnetic pole is formed after splicing. Based on the bearing, continuity and consistency of magnetic field strength of the magnetic poles of the half-opened axial thrust bearing can be basically reserved, and the half-open type thrust magnetic levitation bearing can be applied to high-speed rotation machines; and moreover, a more flexible mounting way can be obtained, particularly to large-size rotation machines.

The invention discloses a composite hose structure for fuel gas transmission, and relates to the technical field of fuel gas transmission and distribution equipment, the composite hose structure comprises a dual-mode quick sealing assembly, dual-mode monitoring is formed by an FBG sensor, a phase-sensitive optical time domain reflectometer and a carbon tube composite filament, the FBG sensor can capture fine strain of a reinforced fiber layer in real time, and the phase-sensitive optical time domain reflectometer can capture the fine strain of the reinforced fiber layer in real time; the phase-sensitive optical time domain reflectometer detects and captures stress waves generated by crack propagation in a material through broadband sound waves, early recognition of millimeter-level damage in a pipe is achieved, grids woven by carbon tube composite filaments are utilized, continuity of the grids is monitored in real time through alternating-current impedance measurement, and the detection accuracy of the millimeter-level damage in the pipe is improved. When local grid resistance is increased due to breakage of the reinforced fiber layer, a micro-damage area can be accurately positioned, when leakage occurs, the memory alloy spring receives an electric signal monitored by a dual-mode, then axial thrust is generated to push the outer side of the fluororubber sealing ring, the fluororubber sealing ring expands in the radial direction under the thrust action of the memory alloy spring, and the leakage is prevented. And rapid and effective mechanical hard sealing is realized.

The invention relates to the technical field of oil and gas well completion tools, and discloses an anti-resistance open hole packer which comprises a central pipe and a rubber sleeve arranged outside the central pipe in a sleeving mode, and further comprises a double-piston setting mechanism arranged on the central pipe in a sleeving mode and defining a pressure-bearing cavity, one end of the double-piston setting mechanism abuts against the end of the rubber sleeve, and the other end of the double-piston setting mechanism abuts against the end of the rubber sleeve. Axial thrust is generated by receiving high-pressure liquid conducted in the center pipe, and the rubber barrel is extruded to deform in the radial direction and be attached to the open hole well wall. And the lower piston assembly is arranged in a pressure-bearing cavity between the central pipe and the double-piston setting mechanism, firstly moves in the direction far away from the rubber barrel under the action of high-pressure liquid, relieves the pre-locking state of the double-piston setting mechanism and then drives the double-piston setting mechanism to move in the direction of the rubber barrel. The open hole packer capable of preventing resistance encountering aims at solving the problems that a setting mechanism is started in advance and set accidentally due to resistance encountering in the process that an existing open hole packer goes into a well, and the existing open hole packer cannot reach a preset packing position accurately.

The invention belongs to the technical field of diesel engine double-wall pipe correcting tools, and particularly relates to a low-speed diesel engine double-wall pipe correcting tool for a methanol dual-fuel ship. One end of the first pipe clamp rotating piece and the first pipe clamp fixing piece are connected and buckled through the first connecting bolt to form an arc-shaped clamping face matched with the outer diameter of one end of the double-wall pipe; one end of the second pipe clamp rotating piece and the second pipe clamp fixing piece are connected and buckled through a second connecting bolt to form an arc-shaped clamping face matched with the outer diameter of the other end of the double-wall pipe, the first pipe clamp and the second pipe clamp move in the same direction or in the opposite directions by rotating the adjusting component, and therefore axial thrust or pulling force is generated. Therefore, radial force is applied to the double-wall pipe arranged in the arc-shaped clamping faces of the first pipe clamp and the second pipe clamp, and the size of the double-wall pipe is corrected to the range required by a drawing. The device is high in correction efficiency, low in labor intensity, easy in precision control and good in universality.

The utility model discloses an automatic pipe pile prestress traction device which is arranged on a supporting plate frame and comprises a tensioning oil cylinder, a traction lead screw and the tensioning oil cylinder are concentrically arranged, the traction lead screw penetrates through the tensioning oil cylinder, and the traction lead screw can rotate around the central axis of the traction lead screw through a moving mechanism and move in the direction of the axis of the traction lead screw. The traction lead screw is detachably connected with a pipe pile mold through axial movement and a traction chuck arranged at the front end of the traction lead screw, a piston rod in the tensioning oil cylinder exerts axial thrust on the traction lead screw and acts on the pipe pile mold to achieve tensioning of prestress, and a plurality of supporting ejector rods are arranged on the front side of the supporting plate frame. An auxiliary adjusting device is arranged on the supporting ejector rod, the auxiliary adjusting device adjusts the central axis of the pipe pile mold to be concentric with the axis position of the traction lead screw, a buffering device for reducing the impulsive force of the pipe pile mold is arranged on the auxiliary adjusting device, and locking connection and traction force application on the pipe pile mold can be automatically achieved. And the safety and the efficiency are further improved.

The invention discloses a high-precision closed-loop force control linear rotating motor and a force control method thereof, and relates to the technical field of motors, the linear rotating motor comprises a shell, a linear motor, a rotating output shaft part, a constant force spring device, a force sensor and a controller, the rotary output shaft part comprises a rotary motor, a rotary connecting piece and an output rotating shaft, and can realize composite motion of axial reciprocating and angular rotation; the constant-force spring device provides constant balance force in the linear direction to compensate for gravity loads. The force sensor detects output thrust in real time and generates a feedback signal; the controller performs closed-loop force control adjustment according to the feedback signal; according to the motor, through the built-in high-precision force sensor and the constant-force spring structure, high-precision, low-force-value and stable force control performance is achieved, output fluctuation can be effectively reduced, and the system response speed and control precision can be improved.

The present invention relates to a pump apparatus for pressurizing liquid hydrogen, and more particularly to a pump apparatus equipped with a thrust balance mechanism for canceling axial thrust acting on an impeller. The pump apparatus includes a rotation shaft (1), a plurality of impellers (2a to 2h) fixed to the rotation shaft (1), bearings (5, 6) for rotatably supporting the rotation shaft (1), a pump casing (7) for housing the plurality of impellers (2a to 2h), and a first thrust balance mechanism (20) and a second thrust balance mechanism (40) for canceling the weight of a rotor including the rotation shaft (1) and the plurality of impellers (2a to 2h) and the axial thrust acting on the plurality of impellers (2a to 2h).

The invention discloses an axial thrust self-balancing structure and an axial thrust self-balancing method, and relates to the technical field of air Brayton expander power generation, the axial thrust self-balancing structure comprises a machine shell and a rotating shaft rotationally connected with the machine shell, the rotating shaft is provided with an annular balancing cavity, and the axis of the balancing cavity is coaxial with the axis of the rotating shaft; two sides of the balance cavity are respectively a compression side and an expansion side; the balance cavity is internally provided with N heat insulation plates, the N heat insulation plates are arranged in the axis direction of the rotating shaft and divide the balance cavity into N + 1 cavities, and N is larger than or equal to 2; the sides, away from the rotating shaft, of all the heat insulation plates are fixedly connected with the machine shell. The sides, close to the rotating shaft, of all the heat insulation plates stretch into the balance cavity and are in clearance fit with the balance A plurality of through holes are formed in all the heat insulation plates, and the through holes in the adjacent heat insulation plates are staggered. Through the structural design of the balancing chamber, the pressure field of the chamber is uniformly distributed, so that the self-balancing of axial thrust is realized, and the radial flow type expansion compressor coaxial device can safely, stably and efficiently operate under multiple working conditions.

A spacecraft thruster distribution and pulse width modulation method based on a dynamic inverse matrix comprises the following steps: calculating a torque matrix generated by each thruster in combination with the installation position, the thrust size and the thrust direction of the thruster; the control direction of each thruster is determined, and grouping is carried out according to the control directions of the thrusters; a thruster for controlling the three-axis positive direction is pre-selected, a torque matrix corresponding to the pre-selected three-axis positive axial thruster is generated, and the air injection pulse width duration of the three axes is calculated in combination with instruction control torque; according to the calculated symbol of the three-axis jet pulse width duration, reselecting a thruster, and obtaining a dynamic torque matrix of the reselected thruster; according to the instruction torque sent by the upper computer and the dynamic torque matrix of the reselected thrusters, the jet pulse width duration of each thruster is calculated based on a matrix inversion algorithm; the thruster pulse width modulation method is designed on the basis of considering the coupling influence of the three axes of the thruster, and can adapt to the large-range change of the mass center of the aircraft.

The invention relates to the technical field of suspension bridge cable clamp detection, and particularly discloses a cable clamp anti-sliding performance detection method based on multi-point stress-strain monitoring, and the method comprises the steps: simulating a main cable through a full-scale sample, installing a test cable clamp and a brake cable clamp, and applying an axial thrust through a jack. A strain gauge, an axial force meter and a displacement meter are arranged on a cable clamp and a bolt, graded loading is carried out to obtain a bolt pre-tightening force attenuation curve and a slippage critical load, and therefore the friction coefficient mu is calculated. And establishing a main cable-cable clamp three-dimensional contact finite element model, and inputting mu and pre-tightening force attenuation data measured by the test to carry out simulation calibration, so that a simulation result is consistent with that of the test. And finally, a bolt is fastened to a design value in the calibrated model, and vertical sling force is applied to the sling clamp lug plate until the sling clamp lug plate slides, so that the maximum anti-sliding force of the sling clamp is obtained. The objective of the invention is to solve the problems that an existing cable clamp anti-sliding performance testing method excessively depends on a finished bridge main cable, the cost is high, the period is long, and matching verification cannot be carried out in the early stage of a project.

A turbomachine comprises a high-pressure rotor shaft defining an outer surface and including a rotor seal disposed along the outer surface. A compressor discharge plenum extends annularly around the outer surface of the high-pressure rotor shaft and is at least partially formed from an inner casing assembly defining a first airflow opening. The rotor seal is configured to form a first seal against a first surface of the inner casing assembly. A pressure seal disk is coupled to the high-pressure rotor shaft. The pressure seal disk is configured to form a second seal against a second surface of the inner casing assembly. The inner casing assembly, the high-pressure rotor shaft, the rotor seal, and the pressure seal disk form a pressure chamber therebetween. The pressure chamber is in fluid communication with the compressor discharge plenum via the first airflow opening.

The present application relates to a kind of pressure measuring anti-pulling pipe sealing joint and its anti-pulling sealing method, it includes main joint, secondary joint, and the pipe clamp sealing assembly in the inner cavity formed by main joint and secondary joint, pipe clamp sealing assembly includes first sliding sleeve, second sliding sleeve, variable-diameter clamp cover, first sliding sleeve, second sliding sleeve, variable-diameter clamp cover three are mutually abutted when main joint and secondary joint are screwed and connected, first sliding sleeve forms preliminary sealing with pipe by annular sealing ring, variable-diameter clamp cover forms preliminary clamping to pipe;When gas-liquid is introduced into main joint, axial thrust in the direction of pipe pulling off is formed to pipe by gas-liquid pressure, and first sliding sleeve, second sliding sleeve, variable-diameter clamp cover three are further mutually abutted by gas-liquid pressure, corresponding annular sealing ring is further deformed, variable-diameter clamp cover is further shrunk and clamped, and the blade of variable-diameter clamp cover cooperates with the axial thrust of pipe and forms oblique cutting, realizes effective anti-backout anti-pulling structure, and with the increase of the pressure in pipe, the sealing property and anti-backout anti-pulling performance of pipe are self-adaptively improved.

A torque determination system for a driveline of a work vehicle includes a driveline component having a housing, intermeshing torque transmitting components within the housing, and a shaft supporting the transmitting components for rotation about an axis of the shaft. A shaft connected to the housing for relative rotation is configured to transfer an axial thrust load from the transmission component to the housing along an axis of the shaft. The system includes a strain sensor mounted on the housing to sense local strain caused by the axial thrust load and output a corresponding strain value. A control unit equipped with a processing and memory architecture executes logic to receive the strain value, derive a torque value associated with the transmission component based on the strain value, and output the derived torque value for use on the work vehicle.

This invention discloses a blind-mating reset fluid connector, comprising: a housing mounted on a first object; an axial elastic element and a guide limiting element provided between a sleeve and the housing; one end of a pipe connected to the first object, and the other end of the pipe detachably connected to a connector, the portion of the pipe being located within the sleeve, and a radial elastic element provided between the pipe and the sleeve; a guide seat movably sleeved on the pipe, and a force transmission element provided between the guide seat and the sleeve, and a guide assembly provided on the guide seat; this invention provides a blind-mating reset fluid connector that, through the force transmission element, allows the guide seat and the sleeve to transmit axial thrust without contact, avoiding interference between the radial and axial floating components of the fluid connector.

The invention belongs to the technical field of high-temperature magnesia carbon brick anti-oxidation coating preparation, and particularly relates to a high-temperature-resistant magnesia carbon brick anti-oxidation coating preparation device which comprises a stirring barrel and a stirrer, the stirrer comprises a driving assembly, a center shaft and stirring blades, and the multiple stirring blades are installed at the bottom end of the center shaft in an annular array mode. The center shaft is further rotationally connected with a plurality of turbulent flow blades which are distributed in an annular array and obliquely arranged, a fixed shaft which is fixed is arranged in the center shaft in a penetrating mode, the bottom end of the fixed shaft is fixedly connected with a first bevel gear, and the inner ends of the turbulent flow blades are fixedly connected with a second bevel gear which is connected with the first bevel gear in an engaged mode. According to the invention, through inclined arrangement of the turbulent flow blades and composite motion of revolution and rotation, not only can radial shear force be generated to cut coating particles, but also axial thrust can be formed to drive convective circulation of upper and lower coatings, so that the problem of layering of high-viscosity coatings is effectively solved, and the mixing uniformity is remarkably improved.

The invention relates to the technical field of low-altitude air defense, in particular to an unmanned aerial vehicle catching net recoil-free ejection device which comprises an ejection support and an ejection mechanism. The ejection mechanism comprises a compression spring, a support screw, a locking sleeve, a connecting chuck and a catching net head assembly, the compression spring is fixedly connected with the launching support and located in the launching support, the support screw is fixedly connected with the launching support and located above the launching support, and the locking sleeve is in threaded connection with the support screw and located above the support screw; the connecting chuck is in threaded connection with the support screw and located on the outer side of the support screw, and the catching net head assembly is detachably connected with the connecting chuck and located above the connecting chuck, so that axial thrust is converted into radial rotating centrifugal force, recoil generated when a catching net is launched is greatly reduced, and the small unmanned aerial vehicle can be stably carried; and the requirement of equipment on a carrier is reduced, and the device can be widely applied to unmanned aerial vehicle interception scenes in daily production and life.

The utility model relates to the technical field of bearing detection, in particular to a thrust roller bearing testing machine, which comprises a bottom fixing seat, and a driving swing mechanism, a driving shaft, a test bearing loading mechanism, a test bearing, a pressure loading mechanism and a loading hydraulic cylinder are sequentially arranged above the bottom fixing seat from bottom to top. A power motor for providing driving force for the slewing mechanism is arranged on the slewing driving mechanism positioned at the bottom; the testing machine has a large load, tests two sets of bearings at the same time, changes the original connection mode of the driving end of the testing machine, and prevents the driving end from being affected by axial thrust. And test requirements are met.

The application discloses a modularized screw conveyor for adjustable feed processing, and belongs to the technical field of agricultural and sideline product processing and conveying mechanical equipment, comprising a plurality of cylinder bodies, the plurality of cylinder bodies are expandable connected through supporting rings, and the cylinder bodies located at the sides are each provided with an end cover, one side of the end cover is connected with a rotary driving part, and at least two cylinder bodies are connected with pipelines. In the application, through the built-in limiting mechanism, a single limiting rod is pushed by the central telescopic driving part, the axial thrust is converted into radial movement through wedge surface cooperation, a plurality of clamping blocks are driven to be synchronously clamped into the clamping grooves of the screw conveying part, the quick assembly and disassembly and firm locking of the screw conveying part are realized, the first spring is matched to absorb the rotary torsion, and the wedge of the fixed block and the groove of the expanded shaft end is matched, so that the accuracy of torque transmission under long-distance expansion and the high stability of overall operation are ensured, and the strength requirement of continuous conveying of large quantities of agricultural and sideline products is met.