136 results about "Torsional load" patented technology

The invention discloses a multi-linkage combined load synchronous application strength testing device. The technical problems that in the prior art, the load applying mode is single, and the combined load cannot be synchronously applied are solved. The device comprises a connecting mechanism and a load applying mechanism, wherein the load applying mechanism comprises a torsional load applying structure, a load transmitting structure and a multi-linkage testing structure. The load transmission structure comprises a special-shaped stress plate and a torsional load transmission assembly, and the torsional load transmission assembly comprises a connecting chuck and a torque plug-in. By controlling the rotation of the torsion load transmission assembly, a pure torsion load applying mode or a conversion mode of converting torsion motion into radial load can be selectively realized, and multi-directional load detection is realized. The invention further provides a combined load synchronous applying function, the single driving source synchronously activates the torsion load path and the radial load path by adjusting the geometric positions of the torque plug-in and the load adjusting plate on the connecting chuck, and synchronous applying of the torsion load and the radial load is achieved.

The invention relates to the field of mechanical fatigue simulation, and discloses a method for simulating and deducing the number of torsion cycles. Comprising the steps that a component three-dimensional parameterized model is constructed, and material fatigue characteristics are defined; applying a periodic torsion load spectrum containing a harmonic component; adopting a stress influence coefficient matrix method to execute quasi-static finite element analysis, and extracting a multi-axis stress state; calculating the maximum alternating shear stress and the average shear stress based on a critical plane recognition technology; converting into a single-axis equivalent stress amplitude through a gradient enhanced multi-axis correction rule; calculating node fatigue damage by combining an S-N curve and a damage accumulation theory; and when the damage reaches a threshold value, outputting a failure cycle number and a position. The innovation points are as follows: the prediction error is controlled within 10% by a critical plane and multi-axis correction technology; a stress matrix method realizes ten thousand times of cycle-level efficient simulation, and the efficiency is improved by 10 times; the risk early warning accuracy rate is improved to 96% by integrating a process correlation defect model; and the research and development period is shortened by 40% through a life cloud picture and an automatic optimization closed loop. The method is suitable for transmission shaft system reliability design.

The utility model relates to the technical field of forklift fork frame strength detection, in particular to a forklift fork frame strength detection device which comprises a bottom plate and a fork frame, and the top of the bottom plate is fixedly provided with a door-shaped frame and a mounting seat; two testing mechanisms used for carrying out downward pressing, lateral pushing and torsional strength detection on the fork frame are symmetrically arranged in the door-shaped frame, and control mechanisms used for controlling the door-shaped frame to move longitudinally are arranged at the positions, corresponding to the two testing mechanisms, of the top of the door-shaped frame; by arranging the testing mechanism, the effects of simulating a vertical pressure test during cargo bearing, simulating a lateral force test during cargo roll or vehicle body turning and simulating a torsional load test caused by uneven ground or cargo gravity center shift during cargo insertion can be achieved; the performance of the fork frame under various actual working conditions can be comprehensively evaluated, and it is ensured that the fork frame can work safely and reliably in a complex working environment.

The invention discloses a combined load synchronous application testing device. The technical problems that in the prior art, the load applying mode is single, and the combined load cannot be synchronously applied are solved. The device comprises a connecting mechanism and a load applying mechanism, wherein the load applying mechanism comprises a torsional load applying structure, a load transmitting structure and a multi-linkage testing structure. The load transmission structure comprises a special-shaped stress plate and a torsional load transmission assembly, and the torsional load transmission assembly comprises a connecting chuck and a torque plug-in. By controlling the rotation of the torsion load transmission assembly, a pure torsion load applying mode or a conversion mode of converting torsion motion into radial load can be selectively realized, and multi-directional load detection is realized. The invention further provides a combined load synchronous applying function, the single driving source synchronously activates the torsion load path and the radial load path by adjusting the geometric positions of the torque plug-in and the load adjusting plate on the connecting chuck, and synchronous applying of the torsion load and the radial load is achieved.

The utility model relates to the technical field of detection and testing, and provides a pipe fitting torsion testing machine. The pipe fitting torsion testing machine comprises a base, a driven mechanism, a driving mechanism and a vertical loading mechanism, a groove is formed in the upper surface of the base, a sliding groove is further formed in the upper surface of the base, and the driven mechanism is connected into the groove. According to the pipe fitting torsion testing machine provided by the utility model, a torsion load loading system, an axial pressure load loading system and a transverse pressure load loading system are highly integrated, so that torsion, axial and bending three-axis composite loading can be realized on single equipment unprecedentedly; the real stress environment of pipe fittings such as geological drill rods under extreme working conditions is reproduced to the maximum extent, compared with a traditional single-axis or two-dimensional loading test, the test result can more accurately predict the actual service performance and failure mode of the pipe fittings, and the applicability is wider.

The invention relates to an experimental device and method for testing the comprehensive mechanical property of a slender flexible cable, and belongs to the technical field of ocean engineering testing. The device comprises a main body frame, a tensile loading device, a bending load loading device and a torsional load loading device. The tensile loading device is not directly connected with the main body frame and is directly connected with the end part of the cable during an experiment. Through a modular integrated design, multi-axis coupling cooperative loading of stretching, bending and twisting is realized; a stretching actuator provides axial tension; the four-point bending actuator drives the slide rail and the roller to realize dynamic bending, and the bending radius is adjustable; the torsion actuator converts linear motion into torque through a gear-rack mechanism, and the supporting rollers eliminate axial interference. The device has the functions of pressure self-adaptive control and energy recovery. The device solves the problem that a traditional testing machine cannot simulate complex ocean working conditions, and is suitable for comprehensive mechanical property evaluation of flexible pipe cables such as submarine cables.

The automobile part torsional fatigue test bench comprises a bench body, a driving mechanism is arranged at one end of the top surface of the bench body, a workpiece carrying structure is arranged at the other end of the top surface of the bench body, a force application structure is arranged at the position, close to the driving mechanism, of the top surface of the bench body, and the driving mechanism comprises a driving bin. The end, away from the force application structure, of the driving bin is fixedly connected with a servo motor, and the two sides of the middle of the interior of the driving bin are fixedly provided with a cycloidal-pin wheel speed reduction assembly and a planetary speed reduction assembly correspondingly. The driving mechanism is driven by the servo motor, a huge oil supply hydraulic system does not need to be used, the occupied area is small, the output torsion load can be switched through the cycloidal-pin wheel speed reduction assembly or the planetary speed reduction assembly, the load output through the planetary speed reduction assembly is low, constant loads can be repeatedly applied to a workpiece for a long time, and the working efficiency is improved. The output load of the cycloidal-pin wheel speed reduction assembly is high, destructive testing of the maximum load can be carried out, and two detection modes can be considered.

The invention relates to the technical field of blade testing, and discloses a blade torsional fatigue testing system and method.The blade torsional fatigue testing system comprises a test bed foundation and at least one torsional vibration exciter, and the test bed foundation is suitable for fixing the root of a blade; the torsional vibration exciter comprises a vibration excitation unit and a blade clamp, the blade clamp is suitable for being clamped and fixed to a blade, the vibration excitation unit is fixed to the blade clamp, and the vibration excitation unit is configured to apply torsional loading to the blade. The blade root is rigidly fixed through the test bed foundation, and displacement interference in the non-torsion direction is prevented from being generated in the test process; a blade clamp of the torsion vibration exciter is clamped on a specified section of a blade, a vibration excitation unit is directly fixed on the surface of the blade clamp through a mechanical connecting piece, the vibration excitation unit generates periodically changing rotating torque during operation, the torque is transmitted to the blade through the blade clamp, and the blade is forced to generate reciprocating torsion deformation around the axis of the blade. And the torsional fatigue load under the actual working condition is simulated.

The present invention discloses a test bench for simulating the torsional working conditions of an engineering vehicle frame, comprising a base, a front fixing portion, a rear fixing portion, a front loading portion, and a rear loading portion; the front fixing portion comprises a support seat, a torsion arm, and two front alternative leaf springs; the support seat is mounted on the base; the torsion arm comprises a connected rotating section and a transmission section; the middle portion of the rotating section is rotatably mounted on the support seat, and its two ends are respectively located on opposite sides of its axial direction; the two front alternative leaf springs are respectively connected to the two ends of the rotating section; the rear fixing portion is mounted on the base and is spaced apart from the support seat along the axial direction of the rotating section; the front loading portion is arranged on the base and is transmission-connected to the transmission section; the rear loading portion is arranged on the base and is used to apply a load vertically to the frame. This solution can simulate the torsional deformation caused by the torsional load borne by the actual vehicle frame; it can also simulate the load borne by the frame when carrying cargo, and can replace the whole vehicle test to conduct reliability and durability tests on the engineering vehicle frame, and has strong practicality and promotion value.

A surgical tool includes a handle having opposing first and second ends, a lead screw and a spline are rotatably coupled to and extend between the opposing ends. The spline is arranged a distance from the lead screw such that the lead screw assumes torsional loading generated by the spline. Another surgical tool includes first and second splines with a first activating mechanism coupled to the first spline and a second activating mechanism coupled to the second spline. Torsional loading generated by the first and second splines to operate the first and second activating mechanisms are balanced by rotating the first and second splines in opposite directions. A method of minimizing torsional loads on components of a robotic surgical tool includes actuating the surgical tool and assuming a torsional force acting on a carriage of the surgical tool with a load balancing member included in the surgical tool.

The application discloses a composite bushing, an automobile suspension and an automobile. The composite bushing comprises a hydraulic bushing with main spring rubber and a buffer bushing. The buffer bushing has an elastic buffer layer, which is sleeved on the outer periphery of the hydraulic bushing along the axial direction of the hydraulic bushing and surrounds the main spring rubber. The hardness of the elastic buffer layer is less than that of the main spring rubber, and the elastic buffer layer is used to produce elastic deformation at least when the composite bushing is subjected to at least one of radial load, torsional load and yaw load. By sleeving the buffer bushing with small dynamic stiffness on the outside of the hydraulic bushing, a composite structure with stiffness decoupling is formed. The buffer bushing is used to absorb part of high-frequency small-amplitude radial vibration by virtue of the small dynamic stiffness, and the hydraulic bushing is used to absorb low-frequency large-amplitude vibration.

The invention relates to the technical field of motor testing, in particular to a multifunctional testing jig for a motor, which comprises a locked-rotor life testing assembly, the locked-rotor life testing assembly comprises a second connecting piece, a third connecting piece and a clamping piece, the second connecting piece comprises a rotating rod, and an output shaft of a detection motor is coaxially connected with the rotating rod. The third connecting piece comprises a second mounting plate, the clamping piece comprises a gear and a clamping source used for clamping the gear, the gear is coaxially connected to the rotating rod, and the torsion load assembly is connected with the rotating rod; the axial load assembly comprises a driving part and a force application part, the force application part comprises a force application plate, the force application plate is parallel to the jig bottom plate, the force application plate is located between the second mounting plate and the jig bottom plate, and the driving part drives the force application plate to move towards the side close to or away from the jig bottom plate; the adjusting piece comprises a wedging rod coaxially connected with the rotating rod, and the top of the wedging rod is coaxially connected with a top shaft in contact with a shaft of the detection motor; the method and the device have the effect of improving low test efficiency.

The invention provides a straightening device (100), for straightening an electrical cable (200). The straightening device comprising a plurality of interlocked roller pairs (130) fixedly arranged for feeding the electrical cable in a feeding direction (150) between a first roller (110) and a second roller (120) of each of the interlocked roller pairs. In operation, freely rotating surfaces of the first and second rollers induce a torsional load (207) on the electrical cable. The interlocked roller pairs are, in the feeding direction of the electrical cable, positioned in an alternating mirrored configuration. Advantageously, inducing a torsional load allows straightening the electrical cable by reducing any residual twist present in the cable as it is unwound from a reel. Advantageously, the alternating mirrored configuration prevents cumulation of the induced torsional load in a single direction, as such a cumulation would dislocate the constituent parts forming the inhomogeneous internal structure of the electrical cable, and thus would be detrimental to the electrical cable.

The invention provides a two-stage analytical model based on a three-dimensional elastic theory. The two-stage analytical model is used for analyzing a failure behavior of a thick-wall composite material pipeline under a complex load condition. Through a stress superposition method, the stress state of the pipeline under the combination of axial pressure, torsional load and bending load is accurately determined. The parameterization research reveals the influence of the winding angle, the lamination sequence and the load on the failure behavior, and provides an important insight about the failure mode. A powerful tool is provided for design and optimization of the composite material pipeline, and application of the composite material pipeline in the oil and gas industry is promoted.

The application relates to the technical field of flywheel energy storage rotating shaft forging detection, and discloses a flywheel energy storage rotating shaft forging strength reliability detection device, which comprises a detection machine body, a supporting table arranged on the detection machine body and used for supporting a workpiece to be detected, a top support arranged on the top of the detection machine body, a lower pressing box arranged at the bottom of the top support and a lower pressing part arranged in the lower pressing box. Through the arrangement of the supporting table, the lower pressing part, two torsion tables and torsion parts on the detection machine body, the flywheel energy storage rotating shaft forgings extracted from the same batch can be pressed by the lower pressing part first and then inputted with torsion loads by the two torsion parts to the end of the workpiece, so that the effects of lower pressing load detection and torsion load detection can be achieved in the same detection device.

The utility model relates to a rubber node composite working condition fatigue test device, which comprises a vertical loading oil cylinder arranged on a test platform through a rack, the device is characterized in that a horizontal loading oil cylinder is fixed on the test platform through a horizontal oil cylinder bracket, a vertical loading module is arranged below the vertical loading oil cylinder in the rack through a supporting plate, and the upper end of the vertical loading module is connected with the output end of the vertical loading oil cylinder; a fatigue test tool is arranged on the test platform and comprises a single-shaft linear sliding table, a lower supporting plate is supported on a sliding plate of the single-shaft linear sliding table, a transmission plate is installed on the lower supporting plate in a sliding mode, and a supporting disc is arranged on the transmission plate and fixed through a pressing plate. A connecting seat is fixed on one side of the transmission plate and is connected with the output end of the horizontal loading oil cylinder; the fatigue test tool is further provided with two sets of clamps which are connected with each other through the vertically-arranged screws. The device can apply radial, deflection and torsion loads to the rubber node at the same time, and radial, deflection and torsion composite working condition tests of the rubber node are achieved.

The application relates to the technical field of automobile stabilizer bars, and particularly discloses an anti-rollover new energy automobile stabilizer bar and a fatigue testing device thereof, which comprises a hollow rod body and connecting parts fixed at two ends of the rod body, characterized in that a helical reinforcing rib extending along the axial direction of the rod body is embedded in the inner wall of the rod body; the rod body is respectively provided with a first working section for bearing a torsional load and a second working section for bearing a bending load, and the wall thickness of the first working section is greater than that of the second working section. The application has the effect of improving the torsional stiffness and bending strength of the stabilizer bar.

The invention provides a corrugated pipe fatigue test device. The corrugated pipe fatigue test device comprises a test bed, a corrugated pipe fixing tool arranged on the test bed and a driving unit used for applying a multi-dimensional load to a to-be-tested corrugated pipe assembly. Wherein the driving unit comprises a first driving unit used for applying a torsional load to the to-be-tested corrugated pipe assembly and a second driving unit used for applying a transverse displacement to the to-be-tested corrugated pipe assembly, and the first driving unit and the second driving unit are arranged on the two opposite sides of the corrugated pipe fixing tool respectively.

A compressor assembly of a gas turbine engine of an aircraft includes an impeller configured to rotate about an engine central longitudinal axis, and a diffuser positioned at a compressor outlet fluidly downstream of the impeller. One or more support structures are secured to the diffuser via a plurality of support fasteners. The plurality of support fasteners are configured to be frangible when torsional loads from the diffuser on the one or more support structures exceed a predetermined limit, thereby isolating the impeller and the diffuser from the one or more support structures.

This disclosure relates to the field of vehicle technology, and more particularly to a rear floor frame, a rear floor assembly, and a vehicle. The rear floor frame includes a frame body with rear end interfaces on both sides of its rear end. These rear end interfaces are used to connect to a rear longitudinal beam. A cavity structure is provided on the rear end interface, with an opening facing the rear of the vehicle body. The cavity structure includes a first cavity and a second cavity distributed vertically. The front end of the first cavity extends beyond the front end of the second cavity in a direction away from the opening, forming a clearance portion at the bottom of the first cavity. In the rear floor frame provided by this disclosure, the size of the second cavity is adapted to the installation space at the rear of the vehicle body, and the depth of the first cavity is greater than the depth of the second cavity. By increasing the depth of the first cavity, the contact area when the rear longitudinal beam connects to the rear end interface can be increased, thereby enabling the mating joint to withstand higher shear stress and bending / torsional loads, and improving the space utilization rate in the length direction of the vehicle body.

The invention provides a large-opening structure torsion load distribution proportion calculation method and device, and belongs to the technical field of aircraft structure design. The method comprises the steps that a torsion model of a large-opening structure is constructed; based on the torsion model of the large-opening structure, determining the torque only generating free torsion under the torsion load of the large-opening structure and the torque only generating constrained torsion under the torsion load of the large-opening structure; a change rate expression of the torsion angle is constructed based on the torque only generating free torsion under the torsion load of the large-opening structure and the torque only generating constrained torsion under the torsion load of the large-opening structure; based on the change rate expression of the torque angle, the torque ratio of the free torsion to the constrained torsion is determined; determining the type of the large-opening structure, determining section parameters of the large-opening structure based on the type of the large-opening structure, and calculating the proportion of free torsion and constrained torsion under the torsion load of the large-opening structure based on the section parameters.

To provide: a mechanical joint that does not require rotation or application of a large load for joining, can transmit a torsional load without additionally incurring excessive costs, and does not come off or reduce the strength of the joint; a joining method for the mechanical joint; a steel pipe fitted with the mechanical joint; a structure having the steel pipe as a constituent element; a construction method for the structure; a design method for the mechanical joint; and a manufacturing method for the mechanical joint.SOLUTION: A mechanical joint 1 of the present invention comprises one or more stages of annular grooves 15 formed on an outer peripheral surface of a male joint 3 and an inner peripheral surface of a female joint 5 so as to face each other when insertion is complete, a C-shaped ring member 17 that can be positioned within the annular groove 15 so as to straddle the male joint 3 side and the female joint 5 side, anti-rotation pin insertion holes 13M, 13F provided in the male joint 3 and the female joint 5, and an anti-rotation pin 11 that passes through the anti-rotation pin insertion hole 13F and a C-shaped cutout portion 19 of the female joint 5 and reaches the anti-rotation pin insertion hole 13M of the male joint 3.SELECTED DRAWING: Figure 1

The present disclosure provides a measuring head (80) that detects the amount of movement of a contact (85) by detecting the amount of movement of the arm member (83) that performs a seesaw-type movement by supporting an arm member (83) having a contact (85) attached to the tip thereof by means of a swing fulcrum member configured as a cross-shaped spring (10) from a cross-shaped thin plate section (10-1), the swing fulcrum member being configured as a cross-shaped thin plate section (10-1), and the swing fulcrum member being configured as a cross-shaped thin plate section (10-1), and the swing fulcrum member being configured as a cross-shaped spring (10) from a cross-shaped thin plate section (10-1). The cross spring (10) is provided with a hole in a manner of penetrating through the central part (10-3) of the cross spring (10), so that the same deformation can be obtained by a smaller load in the measurement direction, the cross spring has sufficient rigidity aiming at the torsional load in the other direction, the center of a fulcrum does not shift, and the repetition accuracy is also improved.

The motorcycle rear rocker arm assembly structure is installed between a motorcycle chassis and a motorcycle rear wheel and comprises a rear forklift frame and a rear rocker arm body, one side of the rear forklift frame is fixedly connected with the motorcycle chassis, the other side of the rear forklift frame is movably connected with the rear rocker arm body, the rear rocker arm body is movably connected with the motorcycle rear wheel, and the motorcycle rear rocker arm assembly structure further comprises a segmented shaft. The rear forklift frame is movably connected with the rear rocker arm body through the segmented shaft. According to the scheme, due to the fact that the rear flat fork truck frame is adopted, torsion loads of the rear wheels are prevented from being directly conducted to the truck frame body, and due to the fact that the rear flat fork truck frame is small in size and relatively easy to cast, replaceability of the rear flat fork truck frame is higher, and the truck is easy to maintain and repair. According to the scheme, a novel connecting structure is adopted, and the split rotating shaft with a pair of locks is adopted, so that the risk that the rear rocker arm falls off from the frame is effectively prevented.

The application discloses a turbine shaft scale-down piece hot machine fatigue experiment method, and belongs to the field of turbine shaft technology and material mechanical property testing. The application comprises a turbine shaft scale-down piece design method, a turbine shaft scale-down piece clamp design scheme method and a turbine shaft scale-down piece hot machine fatigue test system. The application uses an equal proportionally reduced simulation piece to equivalently perform stress state on a dangerous position of a turbine shaft structure, so as to characterize the fatigue performance of the turbine shaft, and can partially replace a component level examination test, shorten a structure design cycle and reduce component consumption. The application uses a design that the scale-down piece and the clamp loading axis are parallel but not collinear, so that the tensile-bending-torsional fatigue test is carried out on a tensile-torsional testing machine, the tensile and torsional loads of the testing machine are converted into tensile, bending and torsional loads, and the loads are applied to the scale-down piece. The application uses a bolt and a special-shaped end clamping mode to respectively transmit the tensile, bending and torsional loads, and the structure is simple and reliable.

The invention discloses a high-temperature internal pressure tensile torsion composite fatigue test system, and relates to the technical field of material mechanical property tests.The high-temperature internal pressure tensile torsion composite fatigue test system comprises a furnace body, clamp assemblies are arranged in the furnace body, and the clamp assemblies are used for clamping the two ends of a test piece; the axial loading device is in transmission connection with the clamp assembly and can apply an axial tensile load, an axial compression load and an axial torsion load to the test piece; the annular internal pressure loading device is communicated with the clamp assembly through a pipeline and can introduce gas with set pressure into the test piece through the clamp assembly so as to apply annular internal pressure to the test piece; the temperature control device is connected in the furnace body and can heat the test piece to a set temperature; the measuring assembly can detect deformation data of the test piece in real time. According to the invention, various loads can be applied during the fatigue test, so that the high-temperature real service characteristics of the pipe can be truly reflected.

The invention provides an umbilical cable multi-axis loading fatigue testing device for deep-sea mining. The umbilical cable multi-axis loading fatigue testing device comprises a frame; the fatigue test assembly is arranged in the frame; the device is used for installing a test piece and comprises a tension-torsion loading mechanism of which the action end is connected with the bottom of the test piece and which is used for applying an axial tension load and a torsion load to the test piece; the deformation loading mechanisms are arranged in the circumferential direction of the test piece, and the telescopic end of each deformation loading mechanism can independently stretch out to apply transverse displacement to different parts of the test piece, so that the test piece is bent and deformed; the internal pressurizing mechanism is communicated with the interior of the test piece and is used for applying pressure to the interior of the test piece; and the upper computer is linked with the fatigue test assembly so as to control the on-off and operation of the fatigue test assembly.

The present application relates to the technical field of structural static balance test, in particular to a marine climate environment-torsional load coupling test equipment, which comprises a test table, a main shaft box and a vice shaft box installed at both ends of the test table, a jaw rotating shaft installed at the coaxial position of the main shaft box and the vice shaft box, used for clamping a shaft to be tested and reversely twisting, a composite shell coaxially nested with the jaw rotating shaft, a cylinder made of duplex stainless steel, and from inside to outside, sequentially compounded with a monitoring layer formed by a distributed optical fiber sensor array and a response layer composed of shape memory alloy net and piezoelectric ceramic driver staggered arrangement, the present application nests the composite shell outside the main shaft and the vice shaft, uses duplex stainless steel as the basic material, completes the synergistic enhancement of the corrosion resistance of the base material and the bonding strength of the coating through the gradient protection layer design, the corrosion resistance is higher than that of ordinary steel, and the service life of the overall structure in the marine climate environment is increased.

This application relates to a method, apparatus, and computer device for determining the tightening torque of a bolted connection. The method analyzes the force data at the bolt connection location to determine the maximum shear working load, maximum axial working load, and maximum torsional load. Based on the maximum shear working load, maximum axial working load, maximum torsional load, and bolt parameters corresponding to any bolt type, the minimum and maximum assembly preload of the bolt are calculated. When the parameters representing preload and / or the parameters representing load meet the verification conditions, the minimum and maximum tightening torques are calculated based on the bolt parameters, minimum assembly preload, and maximum assembly preload. The verification conditions include at least one of surface crushing verification, working stress verification, shear stress verification, and alternating stress verification. Verifying the selected bolts before calculating the tightening torque can effectively improve the accuracy of bolt selection and enhance the reliability of the bolted connection.