42results about How to "Large loading force" patented technology

The invention relates to large scale three-dimensional multifunctional geotechnical test machine. Its feature is that it includes mainframe part and container component. The former includes main frame, level xy directional and vertical weighted platform. The level xy directional weighted platform includes two perpendicular x and y directions weighted platform. The x directional weighted platform is set the bottom, can make the upper y directional one move along the x direction by x direction servo moving machine. The y direction weighted platform can make the loading bearing platform fixed on it move along the y direction by y direction servo moving machine. The vertical weighted platform is used to supply vertical pressure. The invention has good loading ability, can realize multi geotechnical test.

The invention discloses a contact-type reliability test bed capable of conducting mixed loading on an electric main shaft. The test bed is composed of the electric main shaft, a connecting shaft unit, a torque loading device, a radial force electromagnetic loading device, an axial force electromagnetic loading device and a swing arm device. The test bed can load an axial force, a radial force and a torque on the electric main shaft at the same time, control the magnitudes of the three forces in a coordinate mode to simulate cutting forces in different magnitudes and different directions, really and reliably simulate the cutting forces of the electric shaft in practical working conditions, and provide a test foundation for reliability acceleration tests of the electric shaft.

The invention relates to a variable-temperature tension-torsion combined-load in-situ testing device and method for mechanical properties of materials, and belongs to the field of precise instruments.The device adopts a vertical type structure, and comprises a tension unit, a torsion unit, a force and displacement detection unit, a high-/low-temperature loading system and a sealed cavity. The mechanical properties of the materials under the loading of a single tension or torsion load in a variable-temperature environment can be tested, and particularly can also be tested in a tension and torsion combined load mode in the variable-temperature environment. A variable-temperature load module carries out loading by adopting the high-/low-temperature loading system, continuous temperature changing from -100 DEG C to 300 DEG C can be achieved, and thus, a complicated environment of the materials in an actual service environment is simulated. A biaxial-tension and forward-and-reverse-torsionload test is ingeniously achieved through a symmetrical mechanical structure, the microarea position invariance of in-situ monitored materials is thoroughly guaranteed, and thus, mechanical behaviorsand damage mechanisms of specific microareas of specimen materials can be dynamically monitored in situ.

An industrial CT scanning test system. The test system includes a test base, a multi-axis motion swivel table supported on the test base, a ray generator, an image acquisition device, and a fluid pressure loading device, and further includes a control device. The fluid pressure loading device includes at least one loading cylinder, and in case of performing a scanning experiment, the at least one loading cylinder is placed on a sample stage of the multi-axis motion swivel table together with a sample, and real-time loading of loads in different directions on the sample is performed according to test requirements.

The invention discloses a linear-motion electromagnetic loading device which comprises a linkage mechanism, a magnetic powder loader part and an electrical control part. A loading head passes through a linear rolling guide sleeve in the linkage mechanism. One end of the loading head is connected with a one-way tension and pressure sensor. The other end of the loading head is connected with a crank pin through a connecting rod and a threaded sleeve. The magnetic powder loader part is characterized in that: a circulating cooling water channel is arranged in an inner cavity of a stator; a magnetic powder is arranged in a gap between a rotor and the stator; a loading coil is arranged on a circle surface in a stator shell; the rotor is connected with a main shaft and a disc; the disc is provided with the crank pin through a trapezoid sliding block. The electrical control part comprises a loading controller and an industrial control computer. By using the apparatus of the invention, performance analysis and test loading of a prime mover and a mechanical system possessing a linear motion output member can be realized. A constant loading current is used to obtain a variable loading force. The small loading current is used to obtain the large loading force.

The invention provides an axial loading system and a loading method and belongs to the technical field of geotechnical engineering. A first piston and a second piston are arranged in a pipe barrel, a swelling agent is arranged between the first piston and the second piston, the pipe barrel is arranged between a loaded body and a pressure sensor, the second piston is in contact with the loaded body, the loaded body is in contact with a rigid frame body, the first piston is in contact with the pressure sensor, and the pressure sensor is in contact with the rigid frame body. The loading method comprises the following steps that: the pressure sensor is arranged on the rigid frame body; the first piston is arranged in the bottom of the pipe barrel, and the pipe barrel is arranged on the pressure sensor; the swelling agent is filled into the pipe barrel, and a plastic film covers the swelling agent after the swelling agent is tamped to be smooth; the second piston is put in the pipe barrel, and the loaded body is arranged on the upper surface of the second piston; along with the swelling of the volume of the swelling agent, the swelling agent can axially push the first piston and the second piston, and the pressure sensor can be used for recording a value of swelling pressure applied to the loaded body and transferring the value to a statical strain indicator.

The invention discloses a deep plate loading test device which comprises a force transmitting column (3) arranged at the center of a bearing plate (1), and a jack (2) which abuts against and is connected between the bearing plate (1) and the force transmitting column (3). A standard beam (12) is arranged outside the force transmitting column (3) and matched and connected with a dial indicator (13) of the bearing plate (1). A support (4), a main beam (5), an auxiliary beam (6), a base plate (7), a concrete ring beam (8) and a pile side concrete protection wall (9) are sequentially arranged on the same horizontal plane of the standard beam (12). The lower surface of the main beam (5) abuts against and is connected with the upper surface of the force transmitting column (3). The standard beam (12) and the main beam (5) are parallel to the bearing plate (1). The vertical center line of the bearing plate (1), the vertical center line of the jack (2), the vertical center line of the force transmitting column (3) and the vertical center line of the main beam (5) coincide with one another and are perpendicular to the bearing plate (1). The deep plate loading test device is simple in structure and high in loading capacity and can be widely used for deep foundation plate loading tests.

The invention discloses a device and a method for testing the performance of a heavy-load ultra-high-temperature bearing with short-distance isolated cold and hot cavities. The device comprises a driving module, a torque sensor, a supporting bearing, a radial loading device, a tested bearing, a supporting main shaft, an axial loading device and a heating chamber, the heating chamber is arranged onthe base; the supporting main shaft is supported by a supporting bearing arranged outside the heating chamber, the output end of the driving module is connected with a torque sensor, the torque sensor is connected with the other end of the supporting main shaft arranged outside the heating chamber, and an axial loading device and a radial loading device which are used for loading a tested bearingare installed on the heating chamber. The test method comprises the following steps: 1, installing a required tested bearing; 2, preparing for testing; 3, heating the heating chamber; and 4, axial and radial load testing. The device is compact in structure and reliable in work.

The invention relates to a four-axis centering adjustment system and method for a biaxial tensile testing machine and belongs to the field of testing machine technologies. The system comprises a spindle loading chain, a centering adjustment device, a centering sensor, a feedback device and a rack, wherein the centering adjustment device is installed on the spindle loading chain, the spindle loading chain is installed on the rack, and a detection and feedback mechanism is installed on the rack and is used for detecting and controlling the adjustment amount. The system has the advantages that adjustment at five degrees of freedom can be realized, and precision is correspondingly matched with a detection device; the system is connected with a complete machine loading chain, the strength of the whole device is improved, and damage to a loading shaft is reduced; and the system is high in adaptability, can match loading chains in different forms and multiple types of fixtures, occupies a small space, is easy to operate and high in repeated adjustment precision, improves experimental precision and makes measured data more precise.

The invention discloses a device and a method for testing the elongation and the pull-apart of an integral rubber track in a horizontal state. The device comprises a platform, a support seat, a horizontal loading hydraulic cylinder, a horizontal support pillar, a cross beam box body, a simulation driving wheel device I, a simulation driving wheel device II, a load sensor, a displacement sensor and a controller, wherein the support seat is arranged at one side of the platform; the horizontal loading hydraulic cylinder is arranged at the other side of the platform; the horizontal support pillar is fixedly arranged between the support seat and the horizontal loading hydraulic cylinder; the cross beam box body can move back and forth along the horizontal support pillar and is fixed on the horizontal support pillar in a fastening way; the load sensor is used for measuring the load loaded by the horizontal loading hydraulic cylinder; the displacement sensor is used for measuring the displacement loaded by the horizontal loading hydraulic cylinder; the simulation driving wheel device I and the simulation driving wheel device II are respectively capable of moving along the horizontal direction by the cross beam box body and the horizontal loading hydraulic cylinder; the controller is connected with the load sensor, the displacement sensor and the horizontal loading hydraulic cylinder in an electrical control way. After the device and the method are adopted, the development period of the rubber track is shortened, and the experimental cost of the rubber track is reduced.

The present invention relates to a zero-position locking test device and test method for a servo mechanism. The test device comprises a rack assembly, mass block assemblies and mechanical levers; the rack assembly is provided with a bottom plate and a cross beam; 2n test station lower supporting plugs are distributed on the upper surface of the bottom plate; the cross beam is parallel to the bottom plate; the cross beam is provided with n lever supporting plugs; each mass block assembly includes a weight balancing block, a supporting rod and a hanging hook, wherein the weight balancing block is fixed onto one end of the supporting rod, and the hanging hook is arranged at the other end of the supporting rod; n mechanical levers are adopted; each mechanical lever is sequentially provided with a drawing station pin, a fulcrum mounting hole, a compression station pin and a clamping slot; each mechanical lever is connected with a corresponding lever supporting plug through a corresponding fulcrum mounting hole; and the hanging hooks are matched with the clamping slots. According to the zero-position locking test device for the servo mechanism of the invention, the mass block assemblies and the mechanical levers are combined to carry out loading, so that a large loading force for the servo mechanism can be realized; and traditional hydraulic loading can be replaced. The test device is simpler in structure and is good in universality. With the test device adopted, a plurality of servo mechanisms can be tested simultaneously, and therefore, test efficiency is high.

The invention relates to a testing device of a rock-soil body in-situ strength bearing plate and a usage method of the testing device. The testing device comprises a PC, a tester, a power mechanism, a bearing unit, a data collection and feedback unit and an assisted supporting structure; the PC and the tester are connected with each other, and a control module in the tester is a single chip microcomputer system; the power mechanism consists of a power generator, a motor driver, a moment motor, a speed reducer, a coupling and a jack; the bearing unit consists of a stress transmitting pillar and a bearing plate; the data collection and feedback unit is mainly provided with a rotary encoder and a pressure sensor. The device is assembled into a whole in a buckling manner, the rigid loading requirement needed by testing can be guaranteed; and in moving, the testing device can be conveniently moved and transported after being disassembled into small units. The usage method can be controlled by a program online or offline, the testing mode can be selected from a time mode, a displacement mode and a pressure bearing mode. The testing device and the usage method have the advantages that the mode switching is flexible, the testing process, data sampling and storage are automatic, and the like, and the testing efficiency and the quality reliability of testing data can be improved.

The invention provides an automatic clamping pulley inspection machine. The machine solves problems in the prior art that no device detecting quality of pulleys exist, and manual determination on quality of pulleys is low in detection efficiency. In the automatic clamping pulley inspection machine, the middle part of a pulley is provided with a pulley shaft. The automatic clamping pulley inspection machine comprises a workbench. The middle part of the workbench has a gap, the gap is internally provided with a positioning platen. The lower part of the positioning platen is connected with a lower lifting positioning structure which can drive the positioning platen to go up and down and position the positioning platen. A loading structure which applies a loading force on the pulley is arranged on the positioning platen. The workbench on one end of the pulley shaft is provided with a rotary tail spindle. The tip of the tail spindle can contact with the pulley shaft. The workbench on the other end of the pulley shaft is provided with a driving shaft. One end of the driving shaft, close to the pulley shaft, is fixedly provided with a hydraulic chuck. The hydraulic chuck is provided with a bayonet which can position the driving shaft. The inspection machine is advantaged in that the machine can inspect quality of pulleys, and inspection is visual.

The invention relates to an electro-hydraulic servo cylinder large platform test bench for a vehicle guardrail test. The electro-hydraulic servo cylinder large platform test benchincludes a guardrail test bench basic part assembly body (1), a pressure applying three-coordinate sliding table assembly body (2), a guardrail counter-force gantry frame assembly body (3), a counter-force seat (4), a hydraulic pump and synchronous motor assembly body (5), a stroke actuator assembly body (6) and an unbalance loading resisting guide rail and piston rod assembly body (7). The hydraulic pump and synchronous motor assembly body (5) is connected with the stroke actuator assembly body (6) through a hydraulic pipeline, and the stroke actuator assembly body (6) drives the unbalance loading resisting guide shaft frame assembly body (45) in the unbalance loading resisting guide rail and piston rod assembly body (7) to do linear motion back and forth, so that loading of a test piece is realized. The technical problem to be solved by the invention is to make up the technical vacancy of the test bench for the vehicle guardrail test at the present stage and meet the technical requirements of related national standards.

The invention discloses a double-vibration-table connection structure comprising a connecting panel, connecting bases and a force transferring structure. The connecting panel is provided with a bolt hole for being connected with a test piece. The upper ends of the two connecting bases are both fixedly connected with the lower side surface of the connecting panel. The connecting bases are provided with connecting holes for being connected with the vibration tables. The side surfaces of the two connecting bases are fixedly connected via the force transferring structure. The upper side surface of the force transferring structure is fixedly connected with the lower side surface of the connecting panel. The double-vibration-table connection structure is used as a connection structure for connecting the vibration tables with the test piece by means of the connecting panel, the connecting bases and the force transferring structure, and can apply the capability of the two vibration tables to the same test piece as a mean for transferring vibration excitation, thereby enhancing the loading capacity of a vibration test.

The invention discloses a digital electro-hydraulic loading device suitable for a large load interval. The digital electro-hydraulic loading device suitable for the large load interval comprises a hydraulic cylinder group, a guide mechanism, a loading mechanism and a loading control loop, wherein the acting areas of the hydraulic cylinder group, the guide mechanism, the loading mechanism and the loading control loop increase progressively according to the geometric progression; the hydraulic cylinder group is connected with the loading mechanism through the guide mechanism to transmit loadingforce to the loading mechanism. The hydraulic cylinder group comprises a hydraulic cylinder controlled by an electro-hydraulic proportional valve or an electro-hydraulic servo valve and (N-1) hydraulic cylinders controlled by a common on-off valve, wherein N is a positive integer greater than 1, and by controlling the pressure of the electro-hydraulic proportional valve or the hydraulic cylinder controlled by the electro-hydraulic servo valve under different load values and the opening or closing state of the hydraulic cylinders controlled by the common on-off valve, the continuous change of the total output loading force in a certain full range is achieved. The digital electro-hydraulic loading device suitable for the large load interval does not need to adopt the large hydraulic cylinderand a hydraulic system matched with the large hydraulic cylinder, so that the problems of increased manufacturing cost, slow response of the system and poor dynamic performance of the system are solved.

The invention discloses a cement concrete pavement abrasion experiment device which comprises a closed experiment cavity, a loading unit for providing loading force, a tire for simulating the action of a pavement tire and a power unit for driving the loading unit to rotate. A connecting piece used for being connected with a pavement test piece to be tested is arranged on a side wall in the experiment cavity, and the whole connecting piece is of an annular structure. The contact surface of the pavement test piece to be tested and the loading unit is an arc-shaped surface. The loading unit is incontact with a side surface of the pavement test piece to be tested; the loading unit comprises the tire used for simulating the action of the pavement tire, a connecting rod used for connecting thetire and a telescopic rod, and the loading and unloading of the tire to the pavement test piece to be tested are realized through stretching and retracting of the telescopic rod, and a fixed frame isconnected with an output end of the power unit. The loading device provided by the invention adopts an arc side surface loading mode, and a loading mode of a real automobile tire effect can be simulated to the greatest extent.