11 results about "Lenz's law" patented technology

The invention discloses a Lenz's law-based anti-overturning uniform linear motion experimental instrument and an experimental method thereof, and the instrument comprises a non-magnetic tube body which is vertically arranged; the anti-overturning magnet comprises a magnetic ball and a guide block, the guide block is connected with a magnetic pole of the magnetic ball, and the anti-overturning magnet can be arranged in the non-magnetic pipe body; the Hall sensors are arranged at intervals in the axial direction of the non-magnetic pipe body; and the microcontroller is electrically connected with the Hall sensor. Overturning and rotating of the magnet during falling can be effectively limited, track deviation is avoided, and it is ensured that the magnet stably does uniform linear motion; the device is simple in structure and convenient to operate, can visually display the uniform linear motion phenomenon, assists students in understanding the speed concept, and improves the teaching effect.

The application discloses a quick-acting electromagnet and high-voltage switch equipment, wherein the quick-acting electromagnet comprises a shell, a moving execution shaft movably arranged in the shell along the length direction of the shell, a static iron core for driving the moving execution shaft to move in the axial direction of the moving execution shaft to a first direction, a coil and a moving iron core, and a closing conductor movably arranged in the shell along the axial direction of the moving execution shaft, wherein the closing conductor is arranged outside the end of the moving iron core facing the static iron core and connected with the moving execution shaft, and the closing conductor applies an additional driving force to the moving execution shaft to move in the first direction after the coil is electrified. The electromagnet of the application sets the closing conductor and utilizes the Lenz law, so that when the moving execution shaft moves, the moving execution shaft not only receives the driving force generated by the attraction of the moving iron core and the static iron core, but also receives the electromagnetic force generated by the closing conductor. Under the driving of the two driving forces, the movement acceleration of the moving execution shaft can be significantly improved, and the movement time of the moving execution shaft is reduced.

The invention relates to a damping door control structure and cooking equipment, the damping door control structure is used for the cooking equipment, the cooking equipment comprises a box body, and the damping door control structure comprises a door body assembly and a damping assembly; the door body assembly is used for being rotatably arranged on the refrigerator body so as to open or close the refrigerator body. The damping assembly comprises a magnet and a copper pipe, the magnet is convexly arranged at one end, close to the box body, of the door body assembly, and the copper pipe is arranged at one end, close to the door body assembly, of the box body; in the closing process of the door body assembly, the magnet extends into the copper pipe; and in the opening process of the door body assembly, the magnet is separated from the copper pipe. When the door body assembly is closed, the magnet extends into the copper pipe, the magnetic field of the magnet penetrates through the wall of the copper pipe, and the magnetic flux in the copper pipe is changed. According to the Faraday's law of electromagnetic induction, eddy current can be generated in the copper According to the Lenz's law, the magnetic field direction of the eddy current always hinders relative movement of the magnet and the copper pipe, so that resistance is formed, and the damping effect is achieved.

The invention relates to the technical field of aero-engine experiments, in particular to an experimental device and method for simulating the rub-impact effect of aero-engine rotor blades, and the device comprises a supporting seat, a rotating shaft, a simulation fan, an additional rotor, a coupler, a drive motor, a rub-impact simulation assembly and a test assembly. According to the scheme, the electromagnetic driving principle based on the law of electromagnetic induction and the Lenz's law is adopted, the rub-impact force can be accurately controlled by changing the magnitude of current, different rub-impact modes such as a single point, multiple points, a local arc section and even a whole circle can be conveniently simulated for each blade unit, and complex working conditions such as friction coefficient change can be conveniently simulated. Compared with the prior art, the device has the advantages of no contact, no actual wear, no noise, smooth and adjustable rub-impact force and simple maintenance, and the experiment efficiency, reliability and accuracy of simulating the rub-impact effect of the aero-engine rotor blade are improved.

The invention discloses a push-pull upper rail connecting device which comprises an upper sliding rail, a buffer rail, a buffer sliding block, a hoisting base, a door leaf hoisting assembly, a linkage structure and a state switching assembly, the buffer rail is arranged in a sliding cavity of the upper sliding rail, and annular magnets are arranged on the buffer rail at intervals; the buffering sliding block is slidably arranged on the buffering track in a sleeving mode and provided with an insulating coil. The door leaf hoisting assembly comprises a transverse shaft rotating through a vertical shaft and rolling wheels at the two ends, the state switching assembly drives the vertical shaft to enable the rolling wheels to be switched between hoisting base containing holes and wheel rails, the rolling wheels are contained during installation, the hoisting base is inserted into a sliding cavity and then is in butt joint with a buffering sliding block, and the rolling wheels are unfolded to hoist a door leaf. During disassembly, the rollers can be directly moved out of the hoisting base after being stored, disassembly and assembly of the upper rail sliding door and maintenance and overhaul of the rollers and the upper sliding rail are facilitated, the buffering sliding block is based on the Lenz's law, an insulation coil cuts magnetic induction lines to generate an induced magnetic field, the buffering force can be adjusted in a self-adaptive mode at any position according to the acceleration of the door leaf, and the buffering effect is outstanding.

The utility model discloses a cable winding device for coal mine mechanical and electrical installation, which comprises a foot margin assembly, a bottom plate is arranged at the top of the foot margin assembly, a vertical plate is arranged at the top of the bottom plate, the bottom plate is fixedly connected with the vertical plate, two dismounting wheels are arranged on the side surface of the vertical plate, and a rotating wheel is arranged between the two dismounting wheels. An EMI filter is arranged on the side face of the detachable wheel. According to the cable winding device for coal mine mechanical and electrical installation, electromagnetic compatibility can be achieved by means of the EMI filter, electromagnetic interference is eliminated, electromagnetic compatibility is achieved, eddy current with the same frequency is induced on the outer surface of the cable winding device through the metal shielding sleeve, and therefore energy of high-frequency interference is consumed; and the eddy current also generates a new magnetic field, and the direction of the new magnetic field is just opposite to the direction of the interference source according to the Lenz's law so as to counteract a part of energy interfering the magnetic field, so that a circuit in the electromagnetic shielding layer is prevented from being influenced by the high-frequency interference magnetic field.

The utility model discloses a material conveying turning structure of an aluminum material extruding machine, which relates to the field of profile processing, and adopts the technical scheme that the material conveying turning structure comprises a base and a baffle plate positioned on the top surface of one side of the base, the top surface of the base is connected with a speed brake in a sliding manner, one side of the speed brake close to the baffle plate is fixedly connected with a sliding rod, and magnetic blocks are linearly arrayed on the sliding rod; the baffle is fixedly connected with a copper ring, the sliding rod penetrates through the copper ring, and the magnetic block can penetrate through the copper ring. According to the utility model, the speed reducing plate abuts against the raw material and pushes the sliding rod to slide relative to the copper ring, when the magnet passes through the copper ring, the magnet is subjected to resistance based on electromagnetic induction and Lenz's law, so that the movement of the speed reducing plate and the raw material is slowed down, the kinetic energy is smaller when the raw material is contacted with the baffle plate, and the higher the raw material rolling speed is, the more obvious the speed reducing effect is; the surface of the raw material is prevented from generating flaws to influence the quality of the aluminum profile.

The invention proposes a Gravitational and Magnetic Force to Electrical Energy Conversion System (GMECS), a solution based on the simple pendulum principle and developed from the successful foundation of the "Large-sized clock, low power consumption" invention (internationally published by WIPO in 2022). GMECS overcomes the inherent challenges of using a simple pendulum for large-scale electricity production by optimally and effectively combining the interaction of the Earth's gravitational field with the powerful magnetic field of Neodymium N52 rare-earth magnets and the controlled variable magnetic field of an electromagnet to generate significant and continuous torque. In this system, the pendulum's oscillation energy, maintained and amplified by a small amount of electrical energy from an external source (e.g., solar power), is converted into mechanical energy through a complex gearbox system comprising a one-way gearbox and a reversing gearbox. This mechanical energy is then transmitted to a speed-increasing gearbox to augment rotational speed, thereby rotating the rotor of a rare-earth magnet generator, producing useful electrical energy. Experiments have demonstrated the system's superior capability to generate 22W of output power with only 8.7W of input power, showing a positive and significant energy amplification factor (COP > 2.5). This additional energy is attributed to the efficient harnessing from the relative motion of the hundreds-of- kilogram pendulum within the Earth's gravitational field and the interaction between the magnetic field of rare-earth magnets and the controlled variable magnetic field of the electromagnet, via the pendulum's resonance mechanism. This successfully addresses technical challenges, including overcoming the inertia of the speed-increasing gearbox, the generator, and the Lenz's Law effect. The GMECS invention has the potential for scalable electricity production, offering significant benefits in energy savings, providing independent distributed power, being environmentally friendly, and having broad applicability in both industrial and agricultural sectors, especially in areas difficult to access traditional energy sources or requiring sustainable energy solutions.

The utility model relates to a track sliding pipe device with a permanent magnet eddy current braking mechanism, which comprises a track, a permanent magnet eddy current braking mechanism, a permanent magnet eddy current braking mechanism, a permanent magnet eddy current braking mechanism and a permanent magnet eddy current braking mechanism, and the permanent magnet eddy current braking mechanism is arranged on the permanent magnet eddy current braking mechanism. The tackle comprises a tackle body and tackle braking assemblies arranged on the two sides of the tackle body, each tackle braking assembly comprises mounting seats which are oppositely arranged, the mounting seats are sunken inwards from the opposite faces to form mounting grooves, magnets are fixed in the mounting grooves, a distance is formed between the magnets, and the distance is larger than the thickness of the braking plate; based on electromagnetic induction and the Lenz's law, eddy current is generated through relative movement of the magnet and the aluminum brake plate to achieve braking, kinetic energy is converted into heat energy, and compared with traditional schemes such as rubber sheet friction braking and spring pressurization braking, the non-contact characteristic eliminates mechanical abrasion, and the service life of equipment is remarkably prolonged.

The utility model discloses a heavy dynamic penetrometer capable of reducing rebound of a drop hammer, which comprises the drop hammer, a probe rod, an electromagnetic buffer device and a lifting device, and a plurality of layers of composite buffer gaskets are respectively arranged between a first connector and the drop hammer and between a second connector and the probe rod; a cross-shaped separation structure for separating the rod body into four units is arranged in the probe rod; an electromagnetic buffer device is arranged above an impact point at the top of the probe rod; the electromagnetic buffer device comprises a first electromagnetic coil, a second electromagnetic coil and a connecting rod; magnetic fields in opposite directions are formed by using the Lenz's law to restrain drop hammer rebound; the two sensors are arranged below the electromagnetic coil at the top of the probe rod, electrically connected with the electromagnetic coil and used for controlling the electromagnetic coil to be powered on and off; the lifting device comprises an electric pulley arranged at the top of the instrument and four lifting ropes penetrating through the drop hammer body. According to the utility model, the rebound of the drop hammer is effectively reduced, the measurement of the hammering number and the penetration depth is more accurate, and powerful support is provided for long-term monitoring and quality evaluation of engineering geology.

The utility model discloses a composite damper based on electromagnetic-hydraulic-metal buckling coupling. The composite damper comprises a magnetic conductive rod body unit, an electromagnetic induction unit, a hydraulic damping unit and a rotary connecting unit. The magnetic conductive rod body unit penetrates through an inner cavity of the electromagnetic induction unit, and two ends of the magnetic conductive rod body unit are connected with the outside through the rotary connecting unit; the electromagnetic induction unit comprises a conductive layer in clearance fit with the magnetic conductive rod body unit and a cooling medium layer surrounding the conductive layer. The hydraulic damping unit is composed of viscous fluid filled in a cavity between the magnetic conductive rod body unit and the electromagnetic induction unit; and each magnetic conductive rod body unit comprises an energy dissipation structure capable of generating plastic deformation. Through electromagnetic induction and fluid damping composite energy consumption, a copper barrel-shaped structure is arranged, eddy current damping force is generated through the Lenz's law, mechanical energy is converted into heat energy, mechanical friction is not needed, and the maintenance cost is low; meanwhile, the hydraulic oil hinders the connecting rod from sliding through viscous resistance, and kinetic energy is further consumed.