36results about How to "Overcoming the effects of friction" patented technology

The invention relates to a standard apparatus for force measurement, comprising a big hydraulic cylinder and a small hydraulic cylinder; wherein, a weight lifting mechanism is fixed on a piston rod of the small hydraulic cylinder, the weight is arranged below the weight lifting mechanism; the small hydraulic cylinder is communicated with the big hydraulic cylinder to form a communicating vessel by a communicating pipe, a force application mechanism is arranged on the piston rod of the big hydraulic cylinder and the force application mechanism comprises a top beam, a bottom beam and two connecting bars, a movable platform is arranged on two pillar stiffeners which are fixed on a pedestal of the standard apparatus and the movable platform is connected with the pillar stiffeners with a screw thread pair, a load-bearing surface is arranged under the movable platform, another load-bearing surface is also arranged on the upper surface of the bottom beam of the force application platform, and the two load-bearing surfaces correspond with each other. In the invention, by means of static press ram-cylinder system, the Pascal's principle is adopted, a small force value is amplified to a standard large force value, thus reducing the effect of friction force to the maximum extent; furthermore, measurement correction, checking, definition and rating can be carried out on a force sensor with large force value accurately, thus being beneficial to major scientific research projects.

The invention relates to a horizontal well jarring jam releasing device and a construction method thereof used for underground jam releasing work of horizontal wells. The device comprises a jar and a jarring force increasing device, a jarring accelerator is connected between the jar and the jarring force increasing device through an oil pipeline, and comprises a transmission shaft and a center pipe, the transmission shaft is connected with a transmission sleeve through a connecting key, and energy storage springs are arranged in a work barrel outside the center pipe; the upper portion of the transmission shaft is connected with the jarring force increasing device through an accelerator upper joint or an oil pipe coupler, the lower portion of the transmission shaft is connected with the center pipe, the upper portion of the work barrel is connected with the transmission sleeve, and the lower portion of the work barrel is connected with the jar through an accelerator joint; the transmission shaft can drive the center pipe to move upwards to compress the energy storage springs. The device is connected in a jam releasing pipe column, if a fish jam point is not released, ground pumping pressure is increased, force is increased for jam releasing, the requirement for the load of ground equipment is lowered, and the applicability of the jam releasing device is improved. The jam releasing success rate of the horizontal wells can be improved, and the work cost of the horizontal wells is greatly lowered.

The invention discloses a vertical air conditioner and air deflector sliding mechanisms. Each air deflector sliding mechanism comprises a rack, a motor, a gear and a guide rail groove, wherein the rack is located on the side, close to an air conditioner body, of an air deflector and comprises a tooth portion and a guide rail portion, the motor is located on the air conditioner body, the gear is rotationally connected with the motor and meshed with the tooth portion of the rack, the guide rail groove is located on the air conditioner body, the guide rail portion of the rack is located in the guide rail groove, the groove bottom and / or the groove wall of the guide rail groove are / is provided with a plurality of protruding support bodies, and the support bodies are in contact with the guide rail portion. In this way, the air deflector sliding mechanisms greatly reduce the contact areas between the guide rail portions and the guide rail grooves, so that the motion friction force is reduced, the racks are prevented from being influenced by the friction force during movement, the potential hazard that the air deflectors are stopped suddenly and even gets stuck when the air deflectors are driven to move is effectively avoided, and stable and smooth operation of the air deflectors is guaranteed.

The invention discloses a testing device of the radial rigidity of a piston ring. The testing device comprises a fixed platform, a rotating table and a testing assembly, wherein the testing assembly comprises a tension spring, a back-up post, a pressure sensor and a rigid rope; the fixed platform is fixed on a horizontal base; an annular drop pit is formed in the middle of the fixed platform; the position of the center of circle of the drop pit is round and hollow, and the rotating table is installed in the position; the rotating table comprises a rifled tube, a knob and a bolt, the bolt is installed in the rifled tube, and the knob is arranged on the bolt; a sliding chute is formed along the circumference direction of the drop pit, and the testing assembly is installed in the sliding chute; the side wall of the sliding chute is connected with one side of the back-up post, and a groove matched with the pressure sensor is formed at the other side of the back-up post and used for installing the pressure sensor; the pressure sensor is abutted against the outer side of the piston ring; and bosses are respectively arranged at the upper and lower ends of the back-up post, one end of the rigid rope is wound on the bosses, and the other end of the rigid rope is wound on the bolt. The testing device of the radial rigidity of the piston ring avoids the influence of friction force in the traditional method, and is simple in testing operation, high in efficiency, applicable to constant wall pressure rings and non-constant wall pressure rings, and high in practicability.

The invention discloses a geosynthetic material direct tensile / pull-out tester, which comprises a workbench composed of a horizontal plate and supporting legs, and further comprises a driving device,a pull-out device, a displacement measuring device, a tension measuring device and a data collector which are arranged on the workbench. The invention also discloses a test method for carrying out a drawing test on the geosynthetic material by using the direct tensile / pull-out tester. According to the horizontal direct tensile / pull-out tester and a sample preparation mold and a sample preparationmethod matched with the horizontal direct tensile / pull-out tester, tests find that the designed instrument and mold are scientific and efficient, one machine has two purposes, and direct tensile testsand pull-out tests of plain soil, cement soil and fiber reinforced cement soil samples can be well achieved.

The invention discloses an acoustic emission monitoring system comprising an acoustic emission sensor and a ground work station. The acoustic emission sensor is used for being mounted in a borehole of a monitored rock body and is composed of an acoustic emission probe, a probe mounting mechanism and a transmission mechanism for transmitting the mounting mechanism on which the acoustic emission probe is mounted to a preset position in the borehole. The probe mounting mechanism of the acoustic emission monitoring system of the invention solves the problem of effective installation and coupling of the acoustic emission sensor through the pluggable connection and cooperation between a second cover plate of a guide assembly and an upper end cap of a probe sleeve, not only facilitating acoustic emission probe transmission, but also ensuring the coupling effect between the acoustic emission probe and a borehole wall, thereby enhancing the monitoring and forecast reliability of the rock (body) engineering stability and rock burst dynamic disasters. In addition, the system can also achieve usage of multiple acoustic emission probes at the same time, with a wider range of applications.

The invention discloses a wind wheel. The wind wheel comprises a wind wheel frame and wind wheel blades; the wind wheel frame comprises a wind wheel frame upper cover and a wind wheel frame lower cover, first hollow holes and second hollow holes which correspond to the wind wheel frame upper cover and the wind wheel frame lower cover are formed in the axes of the wind wheel frame upper cover and the wind wheel frame lower cover correspondingly, mounting parts are matched with the first hollow holes and the second hollow holes correspondingly, one sides of the mounting parts are downwards sunken to form arc-shaped parts, the two mounting parts are mounted on the wind wheel frame upper cover and the wind wheel frame lower cover and then relatively fixed, a fixed area located in the wind wheel is constituted through arc-shaped grooves, a wind wheel shaft is movably fixed in the fixed area, the two ends of the wind wheel shaft are conical tip ends and abut against the interior of the two arc-shaped grooves correspondingly. According to the wind wheel, an original wind wheel structure is improved, the two ends of the wind wheel shaft abut against the mounting parts, meanwhile, the two ends of the wind wheel shaft are each arranged to be in a conical shape, the resistance action applied to the wind wheel during application is relatively reduced, and using precision is improved.

The invention discloses a test device for dynamic characteristics of extrusion flow of capsule magneto-rheological fluid, which comprises a flexible capsule, the upper edge of the flexible capsule is clamped and sealed by an upper end cover and an upper guide seat installed coaxially, and the lower edge of the flexible capsule is The edge is clamped and sealed by the coaxially installed lower end cover and the lower guide seat, and the outer side of the flexible bag and the inside of the outer cylinder are provided with excitation coils; a working cavity is formed between the flexible bag, the upper end cover and the lower end cover, and injected Magneto-rheological fluid or other liquids to be tested; a guide cavity is formed between the flexible bladder, the upper guide seat and the lower guide seat to guide the extrusion deformation of the flexible bladder. The invention can be used to test the dynamic characteristics of magnetorheological fluid extrusion or extension flow, especially the extrusion or extension flow dynamic characteristics of magnetorheological fluid under high-frequency excitation; it can also be used for other fluids with equal volume or equal area Testing of extrusion flow dynamics.

The invention discloses a testing device of the radial rigidity of a piston ring. The testing device comprises a fixed platform, a rotating table and a testing assembly, wherein the testing assembly comprises a tension spring, a back-up post, a pressure sensor and a rigid rope; the fixed platform is fixed on a horizontal base; an annular drop pit is formed in the middle of the fixed platform; the position of the center of circle of the drop pit is round and hollow, and the rotating table is installed in the position; the rotating table comprises a rifled tube, a knob and a bolt, the bolt is installed in the rifled tube, and the knob is arranged on the bolt; a sliding chute is formed along the circumference direction of the drop pit, and the testing assembly is installed in the sliding chute; the side wall of the sliding chute is connected with one side of the back-up post, and a groove matched with the pressure sensor is formed at the other side of the back-up post and used for installing the pressure sensor; the pressure sensor is abutted against the outer side of the piston ring; and bosses are respectively arranged at the upper and lower ends of the back-up post, one end of the rigid rope is wound on the bosses, and the other end of the rigid rope is wound on the bolt. The testing device of the radial rigidity of the piston ring avoids the influence of friction force in the traditional method, and is simple in testing operation, high in efficiency, applicable to constant wall pressure rings and non-constant wall pressure rings, and high in practicability.

The invention discloses an engineering rock mass acoustic emission monitoring and transmission system, which includes an acoustic emission sensor and a ground workstation. The acoustic emission sensor is installed in a borehole of the rock mass to be monitored, and the received monitoring signal is transmitted to the ground through a cable. In the workstation, the acoustic emission sensor is composed of an acoustic emission probe, a probe installation mechanism and a transmission mechanism that transmits the probe installation mechanism installed with the acoustic emission probe to a set position in the borehole. The probe installation mechanism includes a housing connected to the transmission mechanism and is used for Probe sleeve to accommodate acoustic emission probes. The probe installation mechanism in the engineering rock mass acoustic emission monitoring and transmission system of the present invention solves the problem of effective installation and coupling of the acoustic emission probe through the mutual cooperation of the air bag and the spring arranged between the shell and the probe sleeve, ensuring that the acoustic emission The effective coupling between the transmitting probe and the wall of the borehole enhances the reliability of monitoring and forecasting of the stability of the mine rock (body) and rockburst dynamic disasters.

The invention discloses an acoustic emission monitoring system comprising an acoustic emission sensor and a ground work station. The acoustic emission sensor is used for being mounted in a borehole of a monitored rock body and is composed of an acoustic emission probe, a probe mounting mechanism and a transmission mechanism for transmitting the mounting mechanism on which the acoustic emission probe is mounted to a preset position in the borehole. The probe mounting mechanism of the acoustic emission monitoring system of the invention solves the problem of effective installation and coupling of the acoustic emission sensor through the pluggable connection and cooperation between a second cover plate of a guide assembly and an upper end cap of a probe sleeve, not only facilitating acoustic emission probe transmission, but also ensuring the coupling effect between the acoustic emission probe and a borehole wall, thereby enhancing the monitoring and forecast reliability of the rock (body) engineering stability and rock burst dynamic disasters. In addition, the system can also achieve usage of multiple acoustic emission probes at the same time, with a wider range of applications.

The invention discloses an acoustic emission sensor which comprises an acoustic emission probe, a probe installation mechanism and a transmitting mechanism, wherein the acoustic emission probe is arranged in a probe sleeve, and the acoustic emission probe is in clearance fit with an inner wall of the probe sleeve; a first spring and second springs are arranged between a shell and the probe sleeve; the first spring is arranged in a frame body of the shell, and the first spring is fixedly connected with an end cover on the probe sleeve, and is in a tension state or free state; the two second springs respectively sleeve guide rods in two spring sleeves, and the two second springs are in contact with stopping plates arranged in inner holes of the spring sleeves, and are in a compressed state. According to the acoustic emission sensor disclosed by the invention, the probe installation mechanism solves the problem that an acoustic emission probe cannot be effectively installed and coupled through controllable extension and retraction of the first spring and the second springs which are arranged between the shell and the probe sleeve; thus, reliability of monitoring and predicting mine rock (body) stability and rock burst dynamic disasters is enhanced.

The invention discloses a load test device. The load test device comprises a base, a deflecting plate, a load distribution beam, a ballast head and a horizontal load plate; one end of the base is provided with a fixed baffle plate, and the other end of the base is provided with a fixed U-shaped horizontal supporting seat; the opening direction of the horizontal supporting seat is away from the baffle plate, a convex part of an opening is arranged on the surface, adjacent to the baffle plate, of the horizontal supporting seat, and a long cylindrical horizontal load head is arranged in the convex part; one end of the deflecting plate is hinged to two wings of the horizontal supporting seat, and the other end of the deflecting plate is hinged to one end of the load distribution beam and can rotate; the other end of the load distribution beam is hinged to the ballast head, the horizontal load plate is arranged below the ballast head, and a joined bearing is arranged between the ballast head and the horizontal load plate. The total load is divided into the ballast and the horizontal plane shearing load by virtue of the load distribution beam according to a lever principle, and the vertical load and the horizontal load can be synchronously applied to a test piece by utilizing one centralized load point, so that the problem that ballast and surface shearing composite load requirement cannot be satisfied by a pressure machine and a universal test machine can be solved.

The invention discloses a recoverable on-site acoustic emission sensor, comprising an acoustic emission probe, a probe installation mechanism, and a transmission mechanism for transmitting the combination of the acoustic emission probe and the probe installation mechanism to a set position in a borehole of a monitored rock mass; The probe installation mechanism includes a casing, a probe sleeve, a spring sleeve, a spring and a fixed pulley assembly. The probe sleeve is installed in the guide cylinder of the casing, and the spring sleeve is fixed on both sides of the probe sleeve. One end of the first rope in the pulley assembly is fixedly connected with the end cover of the upper end face of the probe sleeve through a fixed pulley installed on the top of the inner wall of the casing. The invention can realize the control of the movement direction of the probe sleeve through the cooperation of the first rope and the spring arranged between the casing and the probe sleeve, and solve the problem of effective installation and coupling of the acoustic emission probe; The effective coupling of the borehole wall enhances the monitoring and prediction reliability of mine rock (body) stability and rockburst dynamic disasters.

The invention relates to a contact thermal resistance detection device under micro-stress conditions, which relates to the technical field of contact thermal resistance detection. It solves the problem that the traditional contact thermal resistance detection device can only detect the heat transfer of the tested part under relatively large stress, and cannot realize the contact thermal resistance under micro stress or no stress state. At the same time, there is a contact stress effect caused by the material's own weight. problems that cannot be eliminated. The detection device of the present invention makes the left fixing plate and the right fixing plate clamp the measured piece through the cooperation of the screw rod and the nut, and controls the elongation of the spring through the nut, so as to realize the micro-stress loading of the tested piece. There are scales, so the elongation of the screw can be determined, and then the prestress between the tested parts can be determined. At the same time, the tested parts are supported by the lifting table; The heat in the plate will not be transferred to the vacuum cover through the support frame, so that the heat can be concentrated and the detection accuracy can be improved. The invention is suitable for detecting contact thermal resistance.

The invention discloses an acoustic sensor for rockburst monitoring, which includes an acoustic emission probe, a probe installation mechanism and a transmission mechanism for transmitting the combination of the acoustic emission probe and the probe installation mechanism to a set position in a borehole of a rock mass to be monitored. The probe installation mechanism is mainly composed of a sleeve assembly, a guide assembly, an end cover and a spring; the guide assembly and the sleeve assembly or end cover are pluggable connections, and the assembled probe installation mechanism locks the acoustic emission probe on the sleeve In the probe sleeve of the assembly, the spring in the elastic sleeve of the sleeve assembly is in a compressed state. The invention realizes the control of the moving direction of the guide assembly and the probe assembly through the pluggable connection and cooperation between the guide assembly and the sleeve assembly or the end cover, and utilizes the elastic restoring force of the spring, thereby solving the problem of the effective detection of the acoustic emission probe. The difficulty of installation and coupling not only facilitates the transmission of the acoustic emission probe, but also ensures the coupling effect between the acoustic emission probe and the borehole wall.

The invention relates to an oil agent for the spinning of viscose staple fibers. The oil agent is compounded by, by weight, 18-35 parts of composition F and 65-82 parts of composition S, wherein the composition F comprises polyoxyethylene oleate, tetradecyl alcohol oleate, fatty acid polyoxyethylene ether, liquid paraffin and ethanol; the composition S comprises fatty alcohol ether phosphate potassium, castor oil polyoxyethylene ether, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester and a water component. The oil agent for the spinning of the viscose staple fibers has the advantages that the oil agent can effective regulate the dynamic and static friction coefficient in the fiber spinning, the friction performance of the fibers can be improved, the cohesive force among fibers can be increased, good smoothness and softness can be provided for the fibers, undesirable phenomena such as tow loosening, fuzziness, breaking and static can be eliminated or reduced, and the needs of the spinning can be satisfied.

The invention relates to a micro-thrust measuring device that employs a silicon torsion spring, and specifically relates to a silicon torsion spring formed by a silicon micromachining technology; thesilicon torsion spring and an optical path can amplify the micro thrust displacement of a micro propeller, thus measuring micro thrust with high sensitivity; the micro-thrust measuring device can directly measure and evaluate the thrust performance of the micro propeller, thus providing important effects in micro propeller research and development and assessment. In addition, in some emerging fields, such as space satellite control technology, biomechanics, microrobot and bionics, have higher and higher requirements on the thrust measuring technology in a micro N level, Nano N level and even smaller level. The micro-thrust measuring device belongs to the aviation, spaceflight, micro force measurement, micro propulsion technology and micro mechanical fields.