11 results about "Active resistance" patented technology

The application discloses a kind of coal mine underground mining wear-resistant active resistance-reducing drill pipe and its use method, including drill pipe body, spiral steel sheet is arranged around the outer wall of drill pipe body, spiral steel sheet is arranged along the length direction of drill pipe body, ball is rotationally arranged on the side wall of spiral steel sheet away from drill pipe body, part of ball is located in spiral steel sheet, another part is located outside spiral steel sheet.In using the application, after setting the position of drilling machine and the angle of holder, the drill bit is connected with the new wear-resistant resistance-reducing drill pipe, and then the drill bit and the drill pipe are clamped with the holder, the drill bit and the drill pipe are rotated and drilled into the coal wall or rock wall, the coal slag and rock slag generated during drilling are discharged from the drill hole through the spiral steel sheet, the rotatable ball embedded on the spiral steel sheet, the resistance during drilling process is reduced, the efficiency is improved, the drill pipe wear is reduced, and the friction heat is reduced.For the service life of drill pipe, drilling efficiency and construction safety, all have been improved.

The invention discloses a thermal trigger micro-separation structure, a self-adaptive heat dissipation electromagnetic wire and an active heat dissipation inductor, an inductor winding is formed by winding a specially-made self-adaptive heat dissipation electromagnetic wire, and the electromagnetic wire is provided with a self-adaptive heat dissipation layer outside a conventional insulating layer. And the layer is prepared by mixing an insulating polymer matrix and a composite phase change functional filler. The functional filler has a unique [phase change material / expanded graphite] core and foamed thermoplastic polyurethane shell structure, expanded graphite forms a three-dimensional porous skeleton to adsorb a shape-stabilized phase change material to form an inner core, and the outer part is coated with foamed thermoplastic polyurethane to form a secondary packaging structure of the inner core and the outer shell. Passive phase change heat absorption is combined with active resistance early warning and heat dissipation, the overload capacity and working reliability of the inductor are remarkably improved, the service life of the inductor is remarkably prolonged, and the inductor is particularly suitable for application scenes with high power density and serious instantaneous overload.

The invention discloses a high-fidelity identification method and system for a pump and a pipe network system based on active resistance modulation, and the method comprises the steps: firstly, manually setting at least two pipeline resistance states with obvious differences through adjusting devices such as valves, carrying out the frequency conversion operation of a pump in each state, and collecting a plurality of groups of pressure and frequency data; then, an integrated system physical model is constructed, and the model forcibly uses uniquely shared pump performance parameters and pipe network static lift parameters to synchronously fit all data clusters in different resistance states; and finally, by solving the global optimization problem of the model, identifying a real performance curve of the pump, the static lift of the pipe network and the independent resistance coefficient in each state at one time with high precision. According to the method, a flow sensor is not needed, the ill-conditioned problem of a passive data analysis method is solved, on-site in-situ calibration comparable with laboratory precision is achieved, and a reliable basis is provided for construction of a digital twin model and a virtual flowmeter and system health assessment.

This invention discloses a rotator cuff training device with multi-angle resistance adjustment in the field of training equipment technology, comprising: a frame serving as the mounting carrier for each component; a training rod rotatably mounted on the frame; a winding reel rotatably mounted on the frame and rotating synchronously with the training rod; a counterweight slidably mounted on the frame to provide resistance load for rotator cuff training; a rope connected at both ends to the winding reel and the counterweight respectively, for transmitting the rotational force of the winding reel to the counterweight; and a limiting component mounted on the frame to apply unidirectional damping resistance to the rope, exerting a damping effect only during the rope's descent. The unidirectional damping of the limiting component enables passive and slow repositioning, avoiding muscle compensation and secondary injury. Simultaneously, the rotation direction of the training rod can be adjusted to conduct targeted active resistance training, improving the accuracy and efficiency of rotator cuff rehabilitation training and adapting to the postoperative rehabilitation needs of rotator cuff injuries.

The present application belongs to the field of ankle-foot rehabilitation treatment instruments, and provides an ankle-foot orthotic exercise rehabilitation device for student sports injury rehabilitation, which comprises a bottom plate, a supporting leg assembly, an ankle-foot supporting plate, a shell, a binding belt, a driving mechanism and a damping protection assembly. The shell is fixed on the bottom plate, rotating rods are rotatably installed on both sides of the shell, and the ankle-foot supporting plate is fixed on the end of the rotating rods. The damping protection assembly is arranged between the rotating rods and the shell, and provides uniform damping and overload protection for active rehabilitation based on the shear thickening characteristics of non-Newtonian fluid. The present application can realize passive correction and active resistance rehabilitation, has the advantages of uniform speed damping training, overload prevention, and self-adaptive limb support, and solves the technical problems of single mode, poor protection, insufficient adaptability and easy secondary injury of existing student ankle-foot rehabilitation devices. The present application is suitable for the whole cycle of campus student sports injury rehabilitation, has stable structure, convenient operation and excellent rehabilitation effect.

The invention belongs to the technical field of fruit preservation, and particularly relates to a waxberry preservative as well as a preparation method and application thereof. The waxberry preservative is obtained by electrolyzing a mixed solution of calcium chloride and food-grade acetic acid, the effective chlorine concentration of the preservative is 10-80 mg / L, and the pH value is 5.0-6.5. The instant sterilization of the electrolyzed water and the continuous bacteriostasis of the vacuum precooling are combined, and calcium ions in the electrolyzed water are utilized to strengthen the cell structure and induce the self resistance response of the waxberries, so that the spanning from passive preservation to active resistance enhancement is realized, the shelf life of the waxberries can be remarkably prolonged, the nutrition and sensory quality of the waxberries can be maintained, and the method is green, safe and free of residues.

The invention discloses a long lead screw active resistance adjusting supporting device and a long lead screw supporting damping control method, belongs to the field of lead screw equipment, and adopts the technical scheme that the long lead screw active resistance adjusting supporting device comprises a supporting block, two resistance adjusting assemblies, a plurality of excitation assemblies, a plurality of vibration sensors and a control module. The resistance adjusting assemblies are symmetrically arranged on the two sides of the supporting block and comprise corrugated pipes arranged in the axial direction of the lead screw, and shearing cavities filled with magnetorheological elastomers are formed in wave crests of the corrugated pipes. The excitation assemblies are evenly arranged in the axial direction, and the vibration sensors are arranged on the lead screw to collect vibration signals. The control module receives a sensor signal and adjusts the excitation intensity, stable axial rigidity support is provided through the corrugated pipe, the magnetorheological elastomer adjusts the radial rigidity in real time under the action of a magnetic field, and cooperative control over the axial rigidity and the radial rigidity is achieved. The device can effectively restrain multidirectional vibration of the lead screw, obviously improves dynamic stability of a system, and is particularly suitable for the field of high-speed precision transmission.

The invention belongs to the technical field of composite materials. The invention provides a light super-strong composite board which comprises a metal empty box, a plurality of round-corner square tubes are tightly arranged in the metal empty box according to an array, and the axial direction of the round-corner square tubes is perpendicular to the top face and the bottom face of the metal empty box. In the process that the front face is impacted or subjected to high pressure, the arrangement of the round-corner square tubes must be slightly deformed, so that huge repulsion and active resistance to external force are generated among non-displaceable atoms on the outer sides of the tubes, and a nonlinear mechanical response behavior that the larger the external force is, the stronger the resistance is is shown. The super-strong composite board has the characteristics of light weight and high strength.

The utility model relates to femtosecond laser technical field especially relates to a kind of auxiliary joints for femtosecond laser ophthalmic myopia operation, including the number of at least two joint body, the joint body is composed of lower cover body, middle tube body and upper end head, the first locking mechanism for fixedly connecting another joint body lower cover body is provided on the middle tube body of one joint body.The utility model utilizes lower cover body, middle tube body and upper end head to form an independent joint body, by setting up incomplete ball cavity in lower cover body, so as to connect one joint body on another joint body, utilize the resistance connection between telescopic plug bolt and ring groove;By setting up the limiting ring that is pulled by strong spring on lower cover body, utilize limiting ring to pull deflection swing bar, to carry out telescopic drive to limiting plug bolt, by making elastic roller in limiting plug bolt active resistance and lift ring pipe outer wall, the lift ring pipe of corresponding lower cover body opening position is limited to move, realize the reinforced assembly connection between adjacent two joint bodies.

This invention belongs to the field of tunnel trolley technology and solves the problems of weak adaptability to asymmetrical cross-sections and resistance to eccentric loads, as well as low efficiency in variable cross-section adjustment in existing technologies. This invention provides a variable cross-section asymmetrical separable trolley, including a central gantry and left and right gantry frames slidably mounted on either side of it. The left and right gantry frames can move independently laterally to achieve asymmetrical adjustment. Cross-prestressed rods are provided between the left and right gantry frames, and prestress is established through tensioning, generating differential tension under asymmetrical eccentric loads to form a resisting torque. A support seat is slidably mounted on the central gantry; a locking structure is provided within the support seat; a driving structure is provided on the central gantry to drive the lateral movement of the support seat. The lateral movement of the support seat causes the cross-prestressed rods to deform, driving the left and right gantry frames to move laterally. This invention achieves the trolley's adaptability to asymmetrical cross-sections and active resistance to eccentric loads, significantly improving the stability, accuracy, and efficiency of tunnel lining construction.

The invention discloses an upper limb anti-spasm exoskeleton brace for a stroke patient, and relates to the technical field of braces.The upper limb anti-spasm exoskeleton brace comprises two supporting rings, one side of each supporting ring is provided with an elastic ring, the outer surfaces of the two supporting rings are provided with supporting frames, one side of each supporting frame is provided with a fixing plate and an adjusting piece, one side of each fixing plate is provided with a fixing ring, and the other side of each fixing ring is provided with an adjusting piece. A fixed shaft is mounted at the upper end of the fixed ring; a rotating disc is rotationally mounted on the outer surface of the fixed shaft; according to the upper limb anti-spasm exoskeleton brace for the stroke patient, a traditional static supporting process is converted into a dynamic and interactive training process. When a patient actively conducts joint flexion and extension movement, gradual change resistance generated when the elastic piece is stretched is overcome. A complete active resistance training mode is formed in the process, muscle group strength and endurance of the upper limbs can be effectively exercised and enhanced, muscle atrophy is prevented, the cerebral cortex can be stimulated, and remodeling and compensation of damaged neural pathways, namely nerve plasticity, can be promoted.