569 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 belongs to the technical field of transmissions, and relates to a stepless speed change transmission device pressurized by a movable conical disc, which comprises a first-shaft conical disc unit, a second-shaft conical disc unit, an annular transmission part used for being in transmission connection with the first-shaft conical disc unit and the second-shaft conical disc unit, a thrust unit and a torsion unit, the thrust unit comprises a main thrust disc arranged at the non-conical-surface end of a first shaft moving conical disc, and the main thrust disc is connected with a first shaft in a circumferential fixing and axial moving mode. Torque is transmitted between the main thrust disc and the first shaft moving cone disc, axial thrust can be generated on the first shaft moving cone disc, and meanwhile clamping force needed by torque transmission of the annular transmission piece is formed. The axial stroke generated by mutual rotation between the main thrust disc and the first shaft moving cone disc is matched with the axial stroke needed by speed regulation of the first shaft moving cone disc. The torsion unit comprises a main torsion disc which is arranged on the first shaft in a sleeving mode in an axial sliding and circumferential fixing mode, and the main torsion disc is used for providing forward rotation torque for the power source.

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 utility model provides a turret cutter cooling water supply valve group which comprises a valve body, a piston rod and a sealing ring, and a sliding cavity and a liquid inlet channel are formed in the valve body. The piston rod is in sliding fit in the sliding cavity, and a liquid outlet runner with one open end is formed in the piston rod; a cylindrical protrusion is arranged at the tail of the piston rod, a first liquid inlet hole communicated with the liquid outlet flow channel is formed in the side wall of the cylindrical protrusion, and the end of the cylindrical protrusion is a working face and used for sealing and generating axial thrust. The sealing ring is arranged between the sliding cavity and the liquid inlet channel, second liquid inlet holes communicating with the liquid inlet area and the liquid inlet channel are formed in the two ends of the sealing ring in a penetrating mode, and the edge of each second liquid inlet hole is provided with a main sealing face capable of being attached to the working face to form sealing. The tool turret tool cooling water supply valve set is compact in structure, convenient to install, fast in response, capable of greatly improving the reliability of water supply to a tool turret, stable and reliable in use and long in service life.

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.

The utility model relates to a bearing axial thrust loading testing machine which comprises an axial thrust loading mechanism, the axial thrust loading mechanism comprises a base, a front supporting plate and a rear supporting plate, the front supporting plate and the rear supporting plate are fixed at two ends of the base, and at least two directional guide rods are vertically and fixedly arranged between the two supporting plates. The directional guide rod is provided with a pushing plate, a first pressing plate and a second pressing plate which are in relative sliding fit, the front end face of the pushing plate is fixedly provided with a pushing rod which extends out of the front supporting plate in a guiding mode, and the end portion of the pushing rod forms axial positioning on the outer ring of the bearing to be detected. The pressure-bearing end of the pressure sensor abuts against the front end face of the first pressing plate, and a pressure-bearing spring connected to the directional guide rods in a sleeving mode is arranged between the rear end face of the first pressing plate and the front end face of the second pressing plate in an abutting mode. A rotating screw shaft is positioned in the middle of the rear supporting plate, the second pressing plate slides along the directional guide rod and compresses the spring when rotating along with the screw shaft, axial thrust loading is achieved, and force application is stable and reliable.

The invention relates to the technical field of railway vehicle wheel sets, and provides a disc brake type wheel set which comprises a transmission shaft, a pair of shaft sleeves, a shell, a movable disc, a fixed disc and wheels. The space formed by the shell and the shaft sleeve is a first braking area and a second braking area which are independent of each other, the movable disc is movably connected to the transmission shaft, the fixed disc is movably connected to the shell, and the movable disc and the fixed disc are arranged in the shell at intervals and suitable for acting in the axial direction of the shell. A first actuator is arranged in the first braking area, and a second actuator is arranged in the second braking area so as to generate axial thrust on the movable disc and the fixed disc. The invention further provides a bogie and a railway vehicle. The defects that in the prior art, a traditional rail vehicle braking device causes extra loads to the axle, high energy consumption and large inter-spring mass are brought to the rail vehicle, and the braking torque is insufficient in the wheel steering process are overcome, the lightweight design of the axle is achieved, the braking torque is sufficient when the vehicle steers, and the running safety of the rail vehicle is guaranteed.

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 relates to an axial thrust-torque composite calibration standard device which comprises an axial thrust-torque loading host and a high-precision hydraulic load servo control system. The axial thrust and torque loading host is used for installing a calibrated sensor and applying a thrust load and a torque load to the calibrated sensor; the high-precision hydraulic load servo control system is composed of a reference standard instrument, a calibrated piece collecting instrument, a servo hydraulic control system and a control computer, and the servo hydraulic control system is connected with an axial thrust torque loading host. The control computer is respectively connected with a standard force sensor and a standard torque sensor which are arranged on the axial thrust torque loading host through a reference standard instrument, is connected with a calibrated sensor through a calibrated piece acquisition instrument, and is also connected with a high-precision hydraulic load servo control system. The device can simultaneously realize single-component independent calibration and double-component composite calibration, has the advantages of accurate load feedback control and the like, and meets increasingly complicated high-precision engineering measurement requirements.

The present invention discloses a pitch mechanism articulated fulcrum layout optimization design method, and the present invention relates to the field of electromechanical technology. The method comprises the following steps: establishing a pitch mechanism finite element model, setting different articulated fulcrum positions based on the pitch mechanism finite element model, and recording the articulated fulcrum position coordinates; performing force analysis of the pitch mechanism based on the pitch mechanism finite element model, and performing feature selection on the pitch mechanism performance parameters through correlation analysis to obtain optimization target parameters, including pitch load torque, electric cylinder axial thrust, and pitch motor output torque requirements; setting a constraint function, establishing an optimization target function based on the optimization target parameters and the constraint function, using the optimization target function as a fitness function, solving the optimal articulated fulcrum position through a genetic algorithm, analyzing the pitch mechanism motion error and environmental error, and correcting the optimal articulated fulcrum position based on the obtained error value to obtain the optimal articulated fulcrum position accurate value.

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 utility model provides an axial thrust mechanism of an engine crankshaft, which belongs to the technical field of engines and comprises an axial thrust bearing arranged at one end of the crankshaft connected with an engine flywheel, the axial thrust bearing is sleeved on the crankshaft, and the axial thrust bearing limits the crankshaft to move towards one side far away from the flywheel. And the axial thrust bearing is fixed through a bearing seat arranged on the engine shell. According to the mechanism, the axial thrust bearing is additionally arranged at one end, close to the flywheel, of the crankshaft, the bearing is fixed on the shell of the engine, and the thrust bearing is used for bearing huge pressure generated when the clutch works, so that the axial stress of the crankshaft is reduced or eliminated, and the engine is protected.

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 relates to an adjusting mechanism for adjusting the torque of a torsion spring, a torsion spring assembly, a storage device and a vehicle. The adjustment mechanism includes: a shaft element including a shaft portion and a flange portion; the adjusting disc is arranged on the shaft part in a sleeving mode and comprises a lap joint face, the first supporting leg of the torsion spring can be in lap joint with the lap joint face, the lap joint face comprises a plurality of lap joint parts, and when the first supporting leg of the torsion spring is in lap joint with the different lap joint parts, the angle of the first supporting leg relative to the second supporting leg is different; and an elastic thrust element abutting the adjustment disc against the flange portion of the shaft element from the distal side of the adjustment disc. The shaft element is provided with a limiting element, the adjusting disc is provided with a matched limiting element, the limiting element and the matched limiting element can be connected under the action of axial thrust of the elastic thrust element to prevent the adjusting disc from rotating, and the limiting element and the matched limiting element can resist the axial thrust of the elastic thrust element to be disengaged under the action of external force. The adjusting disc is allowed to rotate.

The invention belongs to the technical field of aero-engine design and calculation, and relates to a calculation method for stress of inlet, engine and exhaust parts of a subsonic combustion ramjet, which can obtain axial thrust of an air inlet, a combustion chamber and an exhaust nozzle of the ramjet according to working states of the engine at different speeds and heights and related parameters of the ramjet provided by a power unit. The decomposition of engine part force is realized; after the axial force of the air inlet channel, the engine combustion chamber and the exhaust nozzle is obtained, on one hand, the axial force is provided for the structure specialty, and the structure specialty can conveniently design an aircraft structure frame beam according to the ramjet force transmission requirement; and on the other hand, the aircraft longitudinal moment caused by axial stress of the combustion chamber of the ramjet engine is calculated by the operation and stability specialty in combination with the gravity center position of the aircraft, operation and stability design and check are carried out, and the method can finally meet the requirements of the aircraft for structural design and flight quality calculation related to the ramjet engine.

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).

Apparatus, systems, and articles of manufacture are disclosed to dynamically support axial thrust in pumps. An example apparatus disclosed herein includes a first thrust pad, a second thrust pad, and a thrust disc between the first thrust pad and the second thrust pad, the thrust disc including a first side adjacent to the first thrust pad. a second side adjacent to the second thrust pad, an outer surface, a first channel extending between the outer surface to the first side, and a second channel extending between the outer surface of the thrust disc to the second side.

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.