37results about How to "Overcoming the effects of friction" patented technology

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 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 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.