92 results about "Stress working" patented technology

The invention discloses a dynamic loading device of a railway locomotive drive component and belongs to the field of locomotive engineering tests. The two ends of vertical oil cylinders, the two ends of transverse oil cylinders, the two ends of longitudinal electric locating push-and-pull rods and the two ends of limiting push-and-pull rods are each provided with a ball hinge. One end of each vertical oil cylinder, one end of each transverse oil cylinder, one end of each longitudinal electric locating push-and-pull rod and one end of each limiting push-and-pull rod are connected with a cage-shaped loading frame, and the other end of each vertical oil cylinder, the other end of each transverse oil cylinder, the other end of each longitudinal electric locating push-and-pull rod and the other end of each limiting push-and-pull rod are connected to a base. The six-freedom-degree movement of the loading frame can be controlled. An upper frame of the loading frame is provided with a special connector and can be rapidly connected with a simulation steering frame with the tested drive component, in this way, dynamic loading can be effectively conducted on the drive component installed in the steering frame, and the vibration working environment and the stress working environment of the drive component are simulated. The dynamic loading device is suitable for different tested drive components through the fixed structure, the problem that oil cylinders are frequently dismounted and mounted is solved, a workload is reduced, the oil cylinders are loaded in a tensioned mode, and meanwhile spring struts are connected in parallel to complete loading of vertical static component force. The dynamic loading device of the railway locomotive drive component is mainly used for load testing of the railway locomotive drive component.

A scanning lens for an imaging optical system converges a beam emitted by a light source and deflected by a deflector on a target surface to form a beam spot scanning in a main scanning direction thereon. The scanning lens includes a plastic lens formed by injection molding, which has a diffractive lens structure on at least one surface thereof. The diffractive Wens structure has a plurality of annular zones arranged concentrically about a rotational axis. Each annular zone has a diffracting surface that diffracts the light beam passing therethrough. The diffractive lens structure has stepped surfaces each connecting adjoining diffracting surfaces In a plane including the rotational axis and parallel with the main scanning direction, the stepped surfaces are inclined with respect to the rotational axis so that stress working between a metallic molding for the plastic lens and each of the stepped surfaces in demolding is reduced.

The invention provides a loading device for a bearing tester. A movable place moves upwards and downwards with a stand column as a guide rail, and a loading base plate of a loading head is arranged in a guide rail groove in the lower surface of the movable plate. A test bearing is arranged on a loading shaft. A rubber wheel is arranged on the periphery of the test bearing in a sleeved mode. When the test bearing is tested, the test bearing is a group of machine wheel bearings including two sets of the machine wheel bearings which are arranged in the rubber wheel symmetrically. When the test bearing is tested, the stress working condition of the machine wheel bearings is simulated in the stop state of an airplane. The rubber wheel with the test bearing is arranged on the loading head of a loading system, a drum wheel is loaded through the rubber wheel, and the radial loading test of the bearing and the laterodeviation test loading test of the machine wheel bearings of the airplane are achieved. By means of the loading device for the bearing tester, large load loading can be achieved at a high rotation speed, the stress conditions of the machine wheel bearings in the processes of taking-off, high-speed gliding, instant impact at landing, laterodeviation landing and stop of the airplane can be simulated, the strength and service life of the machine wheel bearings can be assessed precisely, the reliable test basis is provided, and the development time can be shortened effectively.

The invention discloses a design method of an automobile control arm, which belongs to the technical field of automobile design. The method comprises the steps of obtaining key stressed working conditions according to the road spectra load in a control arm position of benchmarking vehicle or platform vehicle of a developed vehicle type and dynamics simulation analysis of the developed vehicle type, establishing a finite element grid envelopment model of the control arm of the developed vehicle type, performing topological optimization on the finite element grid envelopment model according to the key stressed working conditions and preset performance requirement, obtaining a control arm material distribution drawing according to topological optimization results, performing conceptual design according to the control arm material distribution drawing, so as to obtain a control arm geometrical model, obtaining a finite element model meeting design requirements according to the control arm geometrical model, and performing structure design according to the finite element model meeting the design requirements so as to obtain final design. The automobile control arm meeting the design requirements is obtained through CAE simulation, the development cycle of the control arm is effectively shortened, and the research and development cost is reduced.

The invention discloses a method for determining the plastic volume shrinkage of cement paste. The method sequentially comprises the following steps of (1) acquiring relevant size parameters of a casing and a well; (2) acquiring relevant mechanical parameters of the casing and stratum rock; (3) determining relevant working condition parameters of an oil-gas well; (4) calculating a reservoir pressure and an initial fluid column pressure of the cement paste; (5) calculating an isothermal compressibility of the cement paste; (6) preparing the cement paste, performing a weight loss experiment, and determining the final setting time; (7) determining a pore pressure descending curve under the actual working condition according to the similarity comparison principle; and (8) calculating the plastic volume shrinkage of the cement paste. A plastic volume shrinkage mathematic model of the cement paste comprehensively considers the actual stress working conditions of the underground casing and the stratum and the weight loss performance of the cement paste, is simple in principle and simple in operation, is capable of effectively determining the plastic volume shrinkage change principle of the cement paste in a condensation process, and provides a scientific method for determining the plastic volume shrinkage of the cement paste.

The invention relates to a static load simulation test method of an airplane wheel bearing. A test machine comprises a dragging system and a loading system, wherein a tested bearing is enabled by the dragging system to rotate according to a stipulated rotation speed, the loading system is used for providing a test load to the tested bearing, the tested bearing is enabled to simulate the use working conditions such as the stress working condition and the test condition of the airplane wheel bearing in the flying, high-speed sliding, instantaneous impacting when in landing, laterodeviation landing and stopping processes of an airplane, the working condition of the airplane wheel bearing can be comprehensively reflected, the strength and service life of the airplane wheel bearing can be accurately evaluated, the loading force distribution, which is practically applied by the airplane load, on the airplane wheel bearing and the deviation stress working condition of the airplane wheel bearing when the airplane is stopped in a deviation manner can be simulated, and the fault can be efficiently and reliably stimulated. The credible test evidence can be provided for researching the airplane wheel bearing at a higher rotation speed and a heavier load, and the research period can be shortened.

The invention relates to the field of rock dynamics experiments, in particular to a simple falling weight impact test confining pressure loading device and an experimental method thereof, and aims tosolve the problem that a test result cannot truly reflect rock dynamics characteristics due to the fact that confining pressure is difficult to apply in the rock falling weight impact test and a three-way stress state of a rock cannot be truly simulated. The experimental device comprises an x-direction confining pressure loading device, a y-direction confining pressure loading device and a z-direction confining pressure loading device, confining pressure is applied to a rock sample in the x direction and the y direction through elastic deformation of springs, and confining pressure is appliedto the rock sample in the z direction through a hydraulic jack. According to the invention, accurate, uniform and non-interfering confining pressure can be generated in the x direction, the y direction and the z direction, the real stress working condition of an engineering rock mass can be accurately simulated, and meanwhile, a sample is convenient to disassemble and easy to maintain, the rock dynamics experiment precision can be effectively improved, and the experiment scale is reduced.

The invention relates to a dynamic load simulation test method of an airplane wheel bearing. A test machine comprises a dragging system and a loading system, wherein a tested bearing rotates through the dragging system according to the stipulated rotation speed, the loading system is used for providing a test load to the tested bearing, the tested bearing is enabled to simulate the use working conditions such as the stress working condition and test condition of the airplane wheel bearing in the flying, high-speed sliding, landing impact moment, laterodeviation landing and stopping processes of an airplane, the working condition of the airplane wheel bearing can be comprehensively reflected, the strength and service life can be accurately evaluated, the credible test evidence is provided for researching the airplane wheel bearing at a higher rotation speed and heavier load, and the research period can be effectively shortened.

A semiconductor device has a circuit board, a ferroelectric capacitor arranged on said circuit board having a ferroelectric thin film and top and bottom electrodes which are formed so as to hold said ferroelectric thin film, an insulating film formed on said circuit board so as to cover said ferroelectric capacitor, a metallic wiring film formed on said insulating film so as to connect with either of said top and bottom electrodes, and a surface protective film formed so as to cover said insulating film and said metallic wiring film, wherein a synthetic stress working in a surface direction of the ferroelectric thin film of said ferroelectric capacitor is an extensional stress.

The invention discloses a combined aluminum alloy double-wall drill pipe unit composed of an inner pipe, an outer pipe, an upper connector of the outer pipe, a lower connector of the outer pipe, an upper connector of the inner pipe, a lower connector of the inner pipe and seal rings. Two ends of the outer pipe are connected with the upper connector of the upper pipe and the lower connector of the outer pipe through clamping slots, respectively. The seal rings are arranged on matched cylindrical surfaces between the outer pipe and the upper connector of the outer pipe as well as between the outer pipe and the lower connector of the outer pipe. The inner pipe is arranged in the outer pipe. Two ends of the inner pipe are connected with the upper connector and the lower connector of the inner pipe through threads, respectively. As the combined aluminum alloy double-wall drill pipe units coupled, two adjacent outer pipes are in threaded connection through the upper connectors and the lower connectors of the outer pipes, and the inner pipes are in inserting connection through the upper connectors and the inner connectors of the inner pipes. The outer pipe made of aluminum alloy is 1/3 of steel in density, leading to light weight and carrying convenience. The combined aluminum alloy double-wall drill pipe unit is light, convenient to carry, simple in structure, easy to detach, reasonable in load distribution, accurate in the centering position between the inner pipe and the outer pipe, good in stress working condition and the like.

The invention relates to a ratchet-type hand brake fatigue test stand for a forklift. The ratchet-type hand brake fatigue test stand for the forklift comprises a working platform. A loading device used for simulating a hand braking rated load, a ratchet-type hand brake and a power device used for driving the ratchet-type hand brake to be released or locked are arranged on the working platform. The loading device is connected with the ratchet-type hand brake through a loading wire rope, and the power device is connected with the ratchet-type hand brake and drives the ratchet-type hand brake to be released or locked. According to the technical scheme, by the adoption of the spring loading device and through load spring combination and preload adjustment, the stress working conditions of the ratchet-type hand brake itself in the actual working process are effectively simulated, the universality is strong, and the detecting efficiency is high.

The invention relates to a fatigue test bed for an automobile suspension system. The test bed comprises a test bed flat plate with a fixed counter-force support arranged in the center, and an automobile suspension system needing to be subjected to a fatigue test is connected to the fixed counter-force support; two tire simulation clamp assemblies with a same structure are respectively connected tothe left end and the right end of the automobile suspension system; two longitudinal loading assemblies with a same structure are symmetrically and fixedly connected to the rear part of the test bedflat plate; two vertical loading assemblies with a same structure are symmetrically and fixedly connected to the front part of the test bed flat plate; two transverse loading assemblies with a same structure are symmetrically and fixedly connected to the middle of the test bed flat plate; and the left and right longitudinal loading assemblies, the vertical loading assemblies and the transverse loading assemblies are respectively connected with the tire simulation clamp assemblies connected to the left end and the right end of the automobile suspension system. According to the invention, the stress working condition of the automobile suspension system can be simulated, the test accuracy is improved, and the test period is shortened.

The invention discloses a hydrogen sulfide corrosion big data analysis method for an oil-gas field underground pipe column and a wellhead gas transmission pipeline. The method comprises the followingsteps of S1, analyzing the state of a hydrogenated sulfur corrosion mechanism; carrying out the intra-laboratory hydrogen sulfide corrosion, hydrogen embrittlement analysis and hydrogen sulfide corrosion analysis in an engineering environment, wherein the hydrogen sulfide corrosion analysis is an experiment for corroding an oil well pipe by using wet hydrogen sulfide, the hydrogen embrittlement analysis is an experiment for hydrogen embrittlement of the oil well pipe in a hydrogen sulfide environment, and the hydrogen sulfide corrosion analysis in an engineering environment comprises calculation of mechanical behaviors of tissues and structures of pipes containing cracks and defects and stress intensity factors under a tensile stress working condition. According to the invention, H2S corrosion damage can be accurately diagnosed; the direct and reliable operation and maintenance basis is provided, the online monitoring and prejudgment practicability is improved, the vicious accident occurrence frequency is greatly reduced, the safe and stable operation of devices and pipelines is guaranteed, and the problem of vicious accidents caused by the fact that H2S corrosion damage cannot beeffectively and accurately diagnosed and predicted in the prior art is solved.

The invention discloses a medium and low speed magnetic levitation vehicle suspension frame strength testbed. The testbed comprises a bearing bracket, a bearing bracket fixed beam, a vertical load bearing bream, a horizontal load bearing frame, a T-shaped slot platform, a foundation, an actuator, a displacement constraint module and a suspension frame tool connected to a suspension frame; the bearing bracket fixed beam comprises a first fixed beam and a second fixed beam; the suspension frame tool comprises an electromagnet replacement tool and an air spring sliding table replacement tool convenient for performing loading on the suspension frame by the actuator; the testbed can simulate the stress working condition of an unilateral module of the suspension frame under a real environment and analyze the loading condition of the actual magnetic levitation vehicle; the necessary working conditions in the actual running process of multiple medium and low-speed magnetic levitation vehicle capable of loading the lateral load and the longitudinal load can be simulated, the synchronous or asynchronous loading is realized, thereby performing strength test on the suspension frame in a relatively comprehensive way.

A method for querying state parameters of water and steam is used for calculation for a power plant and comprises Excel software. The method is characterized by establishing four work tables including a water and superheated steam work table, a saturated water and saturated steam pressure work table, a saturated water and saturated steam temperature work table and a water and steam state parameter query work table in an Excel workbook. Data of the water and superheated steam work table, the saturated water and saturated steam pressure work table and the saturated water and saturated steam temperature work table are added to each column. Columns of actual pressure, actual temperature, saturated temperature and steam dryness are established in the water and steam state parameter query work table. In addition, columns of work medium state, capacitance, enthalpy and entropy in a work medium thermal parameter and capacitance, enthalpy and entropy in a water thermal parameter are established in the water and steam state parameter query work table. The data in the water and superheated steam work table, the saturated water and saturated steam pressure work table and the saturated steam temperature work table are pasted to the water and steam state parameter query work table after being copied, all state parameters of the work medium under the temperature corresponding to the given pressure, and automatic thermal calculation is achieved by adding the state parameters to thermal calculation.

There is provided a plasma display panel in which a front plate and a rear plate are disposed opposite to each other, a side of a tubular exhaust pipe is disposed in the vicinity of a fine hole provided in the rear plate using a tablet serving as sealant formed of frit glass, peripheries of the front plate and the rear plate and the exhaust pipe are sealed with the sealant in order to form a discharge space, and the discharge space is ventilated and discharge gas is filled into the discharge space through the exhaust pipe. The rear plate and the exhaust pipe are sealed by a sealed part obtained by melting a tablet made of amorphous frit glass not containing lead, and a stress working on the sealed part is a tension in the direction of the rear plate and the direction of the exhaust pipe.

The invention discloses an accurate force measurement module used for conveniently replacing a sensor under a bridge member stress working condition, and belongs to the technical field of building orbridge engineering members. The module comprises a pressure bearing bottom basin and a rubber cushion block embedded in the pressure bearing bottom basin, wherein the side wall of the pressure bearingbottom basin is internally provided with stepped bores along a radial direction of the pressure bearing bottom basin, the stepped bores at least comprise a small-diameter bore and a large-diameter bore, a stepped surface is formed between the small-diameter bore and the large-diameter bore, a force transfer plunger is movably assembled in the large-diameter bore, and a force measurement sensor isin threaded connection in the small-diameter bore; and one end of the force transfer plunger is abutted against the rubber cushion block; and the other end of the force transfer plunger is abutted against the induction surface of the force measurement sensor, and a gap is left between the end part and the stepped surface. Therefore, by use of the accurate force measurement module, when the contact type sensor is replaced, a beam body does not need to be jacked, and a purpose of conveniently disassembling and replacing a contact type sensor and simultaneously easily manually operating can be realized under a situation that the bridge member is normally stressed and a traffic situation is not affected.

A caulking fixation type power element has a diaphragm, an upper lid member forming a pressure actuation chamber with a working gas, a receiving member provided with a through hole in its center portion and arranged in an opposite side to the upper lid member in relation to the diaphragm, and a stopper member arranged in a lower space formed between the diaphragm and the receiving member, and is integrated according to a circumferential welding by lapping the upper lid member, the diaphragm and the receiving member, the stopper member has a main body portion inserted to the through hole of the receiving member, and a flange portion having a larger diameter than the through hole and formed in one end of the main body portion, and the flange portion is arranged so as to come into contact with the receiving member from the lower space side.

The invention relates to a cutting stress display device of a full automatic inside diameter slicer with elastic feeding, belonging to the field of mechanical processing. The device comprises a cutter driven by a spindle motor and an elastic feeding device, wherein the elastic feeding device comprises an X axis mobile worktable driven by a stepping motor and a Y axis mobile worktable driven by a stepping motor; and the X axis mobile worktable is arranged above the Y axis mobile worktable. A connection device for controlling and transmitting the displacement and forces between the X axis mobile worktable and the Y axis mobile worktable is internally provided with a member with elastic function or an assembly with elastic function. The cutting stress display device is characterized in that a display device is arranged on the elastic feeding device, the display device comprises a measuring device and an indicating device; the display device is used for displaying the stress deformation amount of an elastic element, and the deformation amount can be used for indicating the stress working state of a cutting blade so as to determine and adjust cutting feeding parameters and overcome the influence of corresponding equipment, control modes and cutting parameters on different machinable materials, thereby avoiding accidents of blade and material damage caused by over large stress of the blade.

The invention discloses a pile-soil contact surface shearing mechanical-characteristic testing device which comprises a supporting device, a pressure chamber, a pressure device, multiple thrust devices and multiple horizontal fixing devices. The supporting device comprises a frame, a supporting plate and a counter-force frame arranged above the supporting plate. The pressure chamber is arranged onthe supporting plate and comprises a top plate, a base plate and multiple outer-side vertical plates slidingly arranged between the top plate and the base plate, the base plate, the top plate and themultiple outer-side vertical plates jointly define a cavity for containing a pile sample and a soil sample, and the horizontal cross section of the cavity can be adjustable in size. The testing device can exert horizontal thrusts to different sides of the pressure chamber through the multiple thrust devices so as to exert horizontal forces to the sides of the pile sample by extruding the soil sample, and can effectively simulate the pile foundation stress working conditions under the situation that soil body pressures exerted in different directions around a pile are different and make the working conditions have high similarity with actual working conditions. The testing device can test pile foundations of round and square piles and the like with regular-shaped cross sections.

The invention discloses an anti-seismic and inclination prevention construction method of a building pile foundation of a soft soil foundation of a coastal area. The anti-seismic and inclination prevention construction method comprises the following steps of step 1, enabling the high-plasticity flow soil which is located on the upper portion of a soft soil layer to be solidified into a water and soil solidification layer below the bottom elevation of every bearing platform and piling pipe piles and step 2, arranging the plurality of water and soil solidification layers below the plurality of bearing platforms respectively and forming a composite foundation by the water and soil solidification layers and the plurality of pipe piles together, wherein the pipe piles are arranged below every bearing platform. The invention also discloses an anti-seismic and inclination prevention structure of the building pile foundation. According to the anti-seismic and inclination prevention construction method of the building pile foundation of the soft soil foundation of the coastal area, the constraint of the water and soil solidification layers on the positive friction force and the horizontal force is obtained by the pipe piles in the piling process due to the water and soil solidification layers so as to prevent the pipe piles from being inclined in the process of piling or pile foundation bearing platform soil excavation and the composite foundation is high in horizontal thrust resistance and accordingly the stress working conditions of a single pile foundation are changed, a forming natural foundation is combined into an integral stress system, the stiffness is large, the effective pile length of the pipe piles is shortened, the seismic resistance of the pile foundation is improved, and the bearing capacity is large.

The invention relates to a gas, liquid and power conversion system. A ring-shaped cavity is formed between a rotor and a stator, annular concave guide grooves are respectively formed in corresponding positions of the stator, at least two chutes which communicate with the ring-shaped cavity are equidistantly formed in the rotor, a sliding block is arranged in each chute and can slide along the chute, two ends of each sliding block respectively extend into the corresponding annular concave guide grooves in the stator and can slide along the annular concave guide grooves, a pressure stopping card which is arranged on the inner wall of the stator, is matched with the rotor and is used for stopping circulation of gas or liquid is arranged in the ring-shaped cavity between the stator and the rotor, and an inlet and an outlet which respectively communicate with the ring-shaped cavity are formed in the stator and positioned in two sides of the pressure stopping card, so that a one-way flow channel which extends from the inlet to the outlet through the ring-shaped cavity is formed. The stress work state of the gas, liquid and power conversion system can always be optimal, and the energy conversion efficiency is high.

The invention discloses a full-hydrodynamic automatically-controlled supercharged fertilizer apparatus which comprises a supporting assembly, a power assembly and a fertilization assembly, wherein the supporting assembly contains a first support plate, a second support plate and a third support plate which are parallel to each other and are arranged in a proper order; the power assembly contains large telescopic bellows and an elastomer; inflow and outflow of the large bellows are controlled to change pressure; by pressure difference between the large bellows and the elastomer, reciprocating motion of the second support plate is realized; the fertilization assembly contains small telescopic bellows; and the small bellows are alternately stretched or compressed with continuous reciprocating motion of the second support plate, and pressure in the cavity is reduced or increased with the stretching or compression such that a fertilizer is inhaled from a fertilizer inlet one-way valve and is pressed out of a fertilizer outlet one-way valve. The apparatus has advantages as follows: a system is simple; components are easily available; costs are low; and reliability is high. Only driven by hydraulic pressure, the apparatus can adapt to a low-pressure work environment and is suitable for our national situation of low-pressure-pipeline irrigation.

The invention discloses profile steel which comprises an upper flange plate and a web plate, and the end of the upper flange plate and/or the end of the web plate extend/extends outwards to form an extending section. The invention further discloses profile steel which comprises an upper flange plate, a web plate and a lower flange plate, and the end of at least one of the upper flange plate, the web plate and the lower flange plate extends outwards to be provided with an extending section. The invention further provides a profile steel-UHPC composite plate which comprises a UHPC plate and a plurality of profile steel, wherein the UHPC plate is arranged on the upper flange plate of the profile steel. The invention further provides a bridge deck slab and a steel-UHPC composite beam bridge. The structure of the end of the profile steel is optimized, and the end of the profile steel is provided with the outer extending section, so that when the profile steel-UHPC composite plate obtained through the profile steel is connected through a wet joint, joint force transmission is more reliable, the tensile capacity is high, rigidity is high, various stress working conditions such as pulling,pressing, bending, shearing and twisting can be borne, and the joint can meet the full-section pulling condition.