401results about How to "Increase damping" patented technology

The invention belongs to the technical field of polyurethane materials, and provides a high-damping anti-fatigue and anti-aging polyurethane elastomer and a preparation method thereof. The high-temperature-resistant polyurethane elastomer is prepared from the following raw materials in parts by weight: 20 to 30 parts of poly (diethylene glycol adipate) glycol (PDA), 30 to 50 parts of polytetrahydrofuran ether glycol (PTMEG), 5 to 15 parts of chain extender, 0.1 to 0.3 part of A33, 0.1 to 0.2 part of organic tin catalyst, 2 to 5 parts of hindered phenol antioxidant, 1 to 3 parts of hindered amine light stabilizer, 3 to 8 parts of nano particles and 30 to 50 parts of isocyanate prepolymer. The isocyanate prepolymer is prepared from 1, 4-phenyl diisocyanate (PPDI) and branched chain-containing polytetrahydrofuran glycol PTXG according to a mass ratio of 1: (1.8 to 2.2). The polyurethane elastomer is excellent in damping performance and fatigue aging resistance, and meets the use requirements under complex working conditions.

The invention relates to multi-dynamic-bond synergistic self-repairing polyurethane and a preparation method thereof, and belongs to the technical field of polyurethane. The polyurethane is prepared from the following raw materials: poly (dihydric alcohol), diisocyanate, a pyridine chain extender, catechol and ferric ion salt. A main chain of polyurethane is formed by chain extension of polydihydric alcohol and diisocyanate through a pyridine chain extender, an end group is a catechol group exposed after end sealing of a catechol substance, on one hand, ferric ions and the catechol group form a metal coordination bond, and on the other hand, ferric ions and nitrogen atoms on pyridine form a coordination bond; the polyurethane contains multiple dynamic bonds, including coordination bonds of pyridine and iron ions, coordination bonds of catechol and iron ions, and hydrogen bonds between macromolecular chains. When the material is subjected to external pressure, the material has relatively good damping capacity due to internal friction force in a molecular chain; meanwhile, the polyurethane has good self-repairing capability at room temperature.

The utility model discloses an extruder discharge device for rubber production, which relates to the technical field of extruders and comprises a base, a screw extrusion cylinder is fixedly mounted at the top of the base, an extrusion head is arranged at one end of the screw extrusion cylinder, and a fixing component and a labyrinth seal structure are arranged between the screw extrusion cylinder and the extrusion head. According to the technical scheme provided by the utility model, by arranging the fixing assembly, specifically, when in use, the extrusion head is sleeved at one end of the screw extrusion barrel, then one end of the clamping rod is clamped on the outer side of one end of the extrusion head, the clamping block is clamped in the clamping groove, then one end of the movable deflector rod is pulled to enable the clamping rod to be pulled at the 1 / 5 position of one end of the movable deflector rod, and the clamping rod is clamped in the clamping groove under the action of the high-elasticity spring. The linkage clamping rod pulls the extrusion head, so that the extrusion head and the screw extrusion barrel are clamped, one end of the fixing ring sleeves the movable driving lever to fix the movable driving lever, the movable driving lever is pulled up to loosen the clamping rod during disassembly, the extrusion head can be quickly disassembled and assembled, and the portability of replacing the extrusion head is improved.

The invention discloses a double-phase high-temperature damping alloy material as well as a manufacturing method and application thereof. The main components of an alloy comprise manganese, copper, nickel, iron, zinc, aluminum and chromium. The preparation method of the high-temperature manganese-based damping alloy material comprises the steps of mother alloy cast ingot preparation, alloy processing and alloy aftertreatment. According to the high-temperature manganese-based damping alloy, the mixing entropy is larger than 1.5 R, and the valence electron concentration is 5.9 < = VEClt; compared with a single-phase fcc structure in the prior art, the high-entropy manganese-based alloy has the advantages that the high-entropy manganese-based alloy is of an fcc and bcc double-phase structure, the interfacial effect caused by double phases can be brought into full play, and the damping performance of the alloy at the high temperature is effectively improved, so that the high-entropy manganese-based alloy has stable high damping performance within the high-temperature range of 400-800 DEG C; the method can be applied to vibration noise control under high-temperature and oxidation environment conditions. The damping alloy is simple in manufacturing process and low in manufacturing cost.

The invention relates to the technical field of medical instruments, and discloses a hemodialysis double-adjustment limb fixing device which comprises a mounting frame, a limb fixing assembly is arranged on one side of the mounting frame, a support assembly is arranged between the mounting frame and the limb fixing assembly, and the limb fixing assembly comprises a fixing rod fixedly arranged on one side of the support assembly; a positioning rod is fixedly arranged at the upper end of the fixing rod, a plurality of sets of positioning bolts are arranged in the positioning rod in a threaded mode, a plurality of sets of clamping sleeves are fixedly arranged at the other end of the positioning rod, and a plurality of sets of arc-shaped supporting frames are movably arranged among the multiple sets of clamping sleeves. According to the double-adjustment limb fixing device for hemodialysis, the limb fixing assembly and the support assembly are used in cooperation, the multiple sets of arc-shaped supporting frames are arranged so that corresponding space-reserving adjustment can be conducted on different positions of a patient, and meanwhile the plasticity of an air bag is matched with arms of the patient with different figures for fixing.

The invention belongs to the technical field of energy storage systems, and provides a multi-scale energy storage system control method and system, and the technical scheme is that a centralized access mode is adopted, an energy storage device is connected to a wind power grid-connected bus, damping control is adopted, a power oscillation damper is additionally arranged, and damping is increased by controlling the output of a DFIG; mode damping, filtering and phase compensation are improved through a POD control structure installed on the machine side; low-frequency oscillation is suppressed through energy storage, positive damping is provided for frequency oscillation of the system, when low-frequency oscillation occurs in the frequency of the system, the energy storage dynamically adjusts the active output according to the frequency change of the system, the control modes mainly include droop control, inertia control and nonlinear control, power compensation and peak load shifting are achieved, the energy storage utilization rate is high, and the energy storage efficiency is high. Damping control is adopted for a multi-scale energy storage system and a new energy system, a power oscillation damper is additionally arranged, and the small disturbance stability of a high-permeability regional power grid is enhanced.

The invention provides a virtual synchronous generator multi-machine parallel power distribution method, which belongs to the field of motors and power electronics, and comprises the following steps: 1, initializing necessary parameters, and monitoring the state of a power grid in real time; 2, predicting and controlling the dynamic response of the VSG by establishing a small signal model of VSG parallel operation; step 3, dynamically adjusting operation parameters of the VSG; and 4, executing a power distribution strategy by the system, distributing the calculated power to each VSG, and monitoring the process to ensure the uniformity of power distribution. According to the method, power distribution is carried out by preferentially utilizing photovoltaic output, the utilization rate of renewable energy sources is remarkably improved, meanwhile, optimal distribution of loads between the parallel virtual synchronous generators is achieved, the inertia and damping of the system are optimized, and the optimal distribution of the loads between the parallel virtual synchronous generators is achieved through a self-adaptive adjustment control strategy. And the advantage of parameter adjustability of the virtual synchronous generator is fully exerted, so that the control effect is further improved, and the stability of the power grid is enhanced.

The utility model provides a discharge nozzle turnover structure and feeder, including: bottom support plate, top support plate, top plate, hopper, discharge nozzle and shell, bottom support plate upper end is rotatingly connected with top support plate lower end, top plate is fixed in top support plate upper end, hopper is provided on top plate upper end face, shell is provided at top plate bottom, discharge nozzle is fixedly connected with shell bottom, and the top plate is fixed in top support plate upper end and top support plate lower end, the top plate is fixed in top support plate upper end, the hopper is provided with the discharge nozzle. And the hopper communicates with the interior of the discharging nozzle up and down. The hopper is fixedly installed on the top supporting plate through the top plate, the discharging nozzle and the shell are installed on the lower portion of the top supporting plate, the top supporting plate and the bottom supporting plate can be rotationally adjusted, and when the top supporting plate is turned backwards, the discharging nozzle and all components on the upper portion can be driven to be separated from the discharging track. Therefore, the discharging track and the discharging nozzle can be replaced and adjusted conveniently, and the complexity of replacement, disassembly and assembly is reduced. Due to the buffering effect of the butterfly-shaped elastic pieces, a good damping feeling exists in the rotating process, a gap exists between the bottom supporting plate and the top supporting plate, and rotating adjustment is smoother.

The invention belongs to the technical field of oil conservator liquid level monitoring, and discloses a transformer oil conservator oil level digital online monitoring device which comprises an oil conservator and a control circuit, the top and the bottom of the oil conservator are fixedly communicated with a first pipeline and a second pipeline respectively, a dehumidifier is arranged at the top of the first pipeline, and the transformer oil conservator oil level digital online monitoring device further comprises a monitoring assembly arranged in the oil conservator; and the damping assembly is mounted on the monitoring assembly. According to the scheme, the floating block changes along with the change of the oil level in the oil conservator, and at the moment, the floating block drives the rotating shaft to rotate through the connecting rod, so that the contact position of the sliding sheet and the concave surface of the arc-shaped resistor changes; at the moment, the current passing through the arc-shaped resistor at the position of the sliding piece changes along with the change of the contact position of the sliding piece and the concave surface of the arc-shaped resistor, then the control circuit converts a current signal into the height of the liquid level in the oil conservator and transmits data to a monitoring terminal, and therefore the safety and accuracy of the device for monitoring the oil level of the oil conservator are improved.

The invention relates to the technical field of external valves of automobile shock absorbers, and discloses a pilot valve which comprises a liquid passing cover, a special-shaped gasket is connected to the lower portion of the liquid passing cover, an oil passing groove is formed in the special-shaped gasket, the oil passing groove is of a cross structure, and the end of the cross groove is the end of the special-shaped gasket. According to the pilot valve, the oil passing groove is additionally formed in the special-shaped gasket and penetrates through the special-shaped gasket, compared with an existing oil passing groove, the area of the oil passing groove is larger, the oil passing speed is higher, liquid flowing is more convenient, the overall end cap is reduced by 1.5 mm, the axial size occupied by an external valve is further reduced, the rigidity of the special-shaped spring piece is improved, and the service life of the pilot valve is prolonged. According to the pilot valve connector, a pilot valve and a connector are combined into a whole, on the premise that the performance is met, the axial size is reduced, a belleville spring and two special adjusting washers are added, and the better damping effect of the shock absorber is obtained.

The invention provides a tower wind load model test device and test method, the device comprises a tower simulation piece and a damping adjustment unit, the damping adjustment unit comprises an eddy current conductor assembly and an electromagnetic assembly, the eddy current conductor assembly comprises an eddy current conductor and a magnetic back plate, and an air gap is reserved between the electromagnetic assembly and the eddy current conductor. The method comprises the following steps: constructing a tower simulation piece according to a scale ratio, and determining the thickness of a longitudinal main tower rod of the tower simulation piece according to the thickness and the elastic modulus of the longitudinal main tower rod of the tower and the elastic modulus of the tower simulation piece; the critical vortex vibration initial wind speed, smaller than the preset safe wind speed, of the tower is screened out from the vortex vibration initial wind speeds of the tower during vibration of all orders; determining the optimal test simulation wind speed of the tower simulation part according to the critical vortex vibration initial wind speed and the wind speed ratio; and the electromagnetic assembly adjusts the initial damping force of the damping adjusting unit to the target damping force. The method has the advantages of improving accuracy and reliability of test results, reducing potential safety hazards of the tower and the like.

The invention relates to the technical field of floating slab ballast beds, in particular to a novel floating slab ballast bed shock absorber which comprises a shock absorber body, the shock absorber body comprises an upper cover plate and a cylinder, a telescopic sleeve is fixedly connected between the upper cover plate and the cylinder, and the cylinder is filled with a damping agent. The bottom of the upper cover plate is connected with a U-shaped permanent magnet through a connecting assembly, an electromagnet is fixedly installed at the bottom of the inner wall of the barrel, an adjusting assembly is arranged in the barrel, the bottom of the U-shaped permanent magnet is fixedly connected with a plurality of damping rods, and conical spiral blades are arranged on the outer walls of the damping rods respectively. The electromagnet is used for generating repulsive force on the U-shaped permanent magnet, vibration of the upper cover plate is further reduced, the magnetic field intensity of the upper cover plate is changed by adjusting the current intensity, so that the repulsive force is adjusted, the more downward the threaded blade is, the larger the contact area with the damping agent is, the interaction between the threaded blade and the damping agent is enhanced, and the damping effect is improved. And the absorption efficiency of vibration energy is improved.

The utility model discloses a built-in valve type magnetorheological damper with an adjustable channel, which comprises a cylinder body, the cylinder body is of a hollow cylinder structure, the left end of the cylinder body is sealed by an end cover, the end cover is fixed on the cylinder body by a screw, an O-shaped sealing ring II is arranged at a sealing groove of the inner side of the cylinder body and the end cover, a through hole is formed in the center of the end cover, and a piston rod is arranged in the through hole. The piston rod is of a hollow columnar structure, an O-shaped sealing ring III is arranged at the position of an end cover through hole and a sealing groove of the piston rod, and the right side of the piston rod is connected with a piston head upper end cover. A direct flow channel is opened or closed by rotating a shifting piece connecting rod 7, so that the number of liquid flow channels is changed, namely, the zero field damping force is changed, and the damping adjustable range is enlarged. Compared with a traditional magneto-rheological damper, the magneto-rheological damper has the advantages that the damping adjustable range can be effectively enlarged, meanwhile, the zero-field damping force can be changed, and the damping performance of the magneto-rheological damper is more excellent.

The invention provides an online damping control system and method for a main power supply type wind and light field station. The method comprises the steps that S1, parameters of control algorithm software are adjusted; s2, enabling a multi-machine stability analysis module to calculate a characteristic mode of the wind and light field station; s3, calculating mode traction of each control parameter according to the characteristic mode to obtain a corresponding damping parameter adjustment amount; s4, the damping parameters of all the units are updated, the multi-unit stability analysis module of the station is called again, and online damping control is completed; and S5, if the damping parameter adjustment fails and the system oscillates, sensing the oscillation frequency through the static synchronous machine, and performing concentrated damping injection to suppress oscillation. The damping of the whole station can be improved and the oscillation risk can be reduced under the condition that the running state of each unit in the main power supply type wind and light station changes at any time; after the system oscillates, through concentrated damping injection of the static synchronous machine, rapid suppression of the oscillation is realized, and the duration of the oscillation is reduced.

The invention discloses a hindered phenol AO-1010 / nitrile rubber composite damping material and a preparation method thereof. The hindered phenol AO-1010 / nitrile rubber composite damping material comprises a nitrile rubber matrix, zinc oxide, stearic acid, sulfur, carbon black, an anti-aging agent 4020, an accelerant DM, an accelerant TMTD and hindered phenol AO-1010. According to the invention, hindered phenol AO-1010 is adopted to form hydrogen-bond interaction on a nitrile rubber matrix to improve the damping performance of nitrile rubber, and fracture and recovery of hydrogen bonds can greatly improve the friction resistance of molecular chain activity of nitrile rubber, so that the movement of molecular chains is hindered, the friction heating effect between molecules is improved, and the damping performance is better; a proper amount of carbon black is added into the rubber blend, and the carbon black is used as a rubber reinforcing agent, so that the mechanical property of the rubber can be greatly improved, the carbon black has a relatively strong adsorption effect on molten hindered phenol AO-1010, and the compatibility between the hindered phenol AO-1010 and a rubber matrix is indirectly improved; therefore, the rubber can still keep good mechanical properties while having good damping performance.

The utility model discloses a high-pressure and large-flow combined type sealing safety valve which comprises a shell, a valve, a guide sleeve and a spring seat, the valve and the guide sleeve are arranged in the shell, the left end of the valve is in contact with the inner wall of the shell to form sealing, the right end of the valve is inserted into the guide sleeve, the spring seat is inserted into the shell, a guide part is arranged in the center of the spring seat, and the guide part is connected with the guide sleeve. The guide part is inserted into the guide sleeve, a spring is arranged between the spring seat and the guide sleeve, a sealing gasket is arranged between the sealing gasket and the guide sleeve, the section of the sealing gasket is of a convex structure, and a sealing groove I and a sealing groove II are formed in the corresponding faces between the sealing gasket and the guide sleeve respectively. The inner ring of the sealing gasket is positioned in a wall body formed by the sealing groove I and the sealing groove II; the novel sealing gasket sealing mode is adopted, the instantaneous impact resisting function and the compensation function are achieved, when the safety valve works, working media pass through the spherical filter screen at the inlet, and the service life is prolonged.

The invention provides a self-rebounding heat-preservation and heat-insulation protective coating with ultralow thermal conductivity and a protective coating. The self-rebounding heat-preservation and heat-insulation protective coating with ultralow thermal conductivity comprises a coating body and a coating layer, comprising silicon resin emulsion, acrylic resin emulsion, modified polymer expanded microspheres, modified mineral fibers, polyvinyl alcohol toughened and modified hydrophobic silicon dioxide aerogel, a cross-linking agent, a catalyst, a thickening agent, a dispersing agent, a defoaming agent, a coalescing agent, a pH regulator, ethylene glycol and deionized water. The modified polymer expanded microspheres are polymer expanded microspheres subjected to surface modification treatment by a silane coupling agent I, and the modified mineral fibers are mineral fibers subjected to surface modification treatment by a silane coupling agent II. The lowest heat conductivity coefficient of a protective coating obtained by curing the ultralow-heat-conductivity self-rebounding heat preservation and insulation protective coating can reach 0.0180 W / (m.k) at the temperature of 25 DEG C, and the heat insulation temperature difference obtained after irradiation of a non-contact infrared heating lamp at the temperature of 80 DEG C for 15 min and the heat insulation temperature difference obtained after heating of a contact heating platform at the temperature of 80 DEG C for 15 min are larger than 35 DEG C and 40 DEG C respectively.

The utility model provides an MEMS piezoelectric sounder and a loudspeaker, first piezoelectric composite layers are symmetrically arranged at specified edge positions, a plurality of slotted structures are arranged in a specified area, a first diaphragm edge of a formed diaphragm structure is an anchoring edge, and an edge slotted structure is arranged at a non-anchoring edge. The internal stress of each diaphragm layer in the diaphragm structure caused by the process can be reduced by arranging the slotting structure, the flexibility of the diaphragm structure can be improved by covering the slotting structure with the flexible material, meanwhile, the sound leakage of the MEMS piezoelectric sounder at low frequency is reduced, the vibration amplitude and the emission sound pressure level of the MEMS piezoelectric sounder are improved, and the sound quality of the MEMS piezoelectric sounder is improved. According to the MEMS piezoelectric sounder, the flexible material with low density is adopted to replace a silicon vibrating diaphragm with large density, the mass of the vibrating diaphragm structure is reduced, the vibrating diaphragm structure of the rectangular bridge type structure can push out more air, the flexible material increases system damping, a sound pressure level SPL frequency response curve and a THD frequency response curve can be improved, and therefore the tone quality of the MEMS piezoelectric sounder is improved.

The invention provides a water-based damping coating and a preparation method thereof, and relates to the technical field of coatings. An amine compound reacts with polyurethane to form a urea bond, so that a highly-crosslinked polyurethane network structure is formed, and the damping performance is enhanced; meanwhile, a modified nano material is introduced to increase the internal friction force of the material, and a dispersed multi-phase structure can also be formed in a polyurethane matrix, so that crack expansion and energy transfer are effectively hindered, and more mechanical energy is consumed; in the introduced surface acid etching hindered phenol / epoxy microspheres, large groups in an antioxidant AO-80 structure can generate internal friction in a deformation process so as to increase energy dissipation; the epoxy resin is used as a matrix of the microspheres, and can form relatively strong interface interaction with a polyurethane matrix, so that energy can be further dissipated, and the damping effect can be enhanced; the surface roughness of the hindered phenol / epoxy microspheres is increased through surface acid etching, and the physical binding force between the microspheres and a polyurethane matrix is enhanced.

The invention discloses a laser heating ultrasonic vibration auxiliary ultra-precision machining turning and milling integrated machine tool and a control method, the laser heating ultrasonic vibration auxiliary ultra-precision machining turning and milling integrated machine tool is a horizontal five-axis machine tool, and a laser heating ultrasonic auxiliary turning module is fixedly connected to a B-axis rotating module through screws; an ultrasonic system in the laser heating ultrasonic vibration auxiliary milling module is connected and fixed to the B-axis rotating module through a screw, and an external laser system is connected and fixed to the self-leveling type air floating vibration isolation platform through a screw. Meanwhile, the invention discloses a tool nose micro-motion track solving mode of an ultrasonic system turning and milling module in the laser heating ultrasonic vibration auxiliary ultra-precision machining turning and milling integrated machine tool control method. A control mode of an external laser group system in the laser heating ultrasonic vibration auxiliary milling module is adopted; a conversion mode between a machine tool coordinate system and a tool coordinate system, and a conversion mode between a turning coordinate system and a milling coordinate system in the tool coordinate system.

The invention discloses a construction method of a vibration reduction and isolation system for relieving the influence of industrial vibration on surrounding buildings. The construction method comprises the following steps that firstly, an industrial vibration source and the surrounding buildings are determined; 2, designing a vibration isolation trench; 3, excavating a vibration isolation trench; 4, loose soil bodies are removed, and soil residues are cleaned; 5, heating the modified asphalt, and heating and stirring the modified asphalt and the added hemp knife; sixthly, the improved asphalt hemp mixture is poured into the vibration isolation trench to be filled layer by layer; 7, naturally cooling and curing the mixture; and 8, sealing the vibration isolation trench by adopting a rubber cover plate. The vibration isolation ditch for pouring the improved asphalt hemp mixture is arranged between the industrial vibration source and the building, the propagation path of vibration waves generated by the industrial vibration source is changed, the energy of the vibration waves is consumed, the vibration reduction and isolation energy consumption efficiency of the vibration reduction and isolation system is greatly improved, vibration disasters of industrial vibration to surrounding houses are effectively relieved, and the service life of the vibration reduction and isolation system is prolonged. And meanwhile, industrial production is not affected, and the method has creative engineering significance and has the practical value of simple construction process and low cost.

The utility model provides an aerial fog generating device which comprises an upper shell and a lower shell, the upper shell and the lower shell are rotationally connected through a shaft, and elastic force generated by an elastic piece can press the upper shell on the lower shell all the time. The utility model has the beneficial effects that the elastic force generated by the elastic piece can always press the upper shell on the lower shell, the sealing performance between the upper shell and the lower shell in a closed state can be improved under the condition that the upper shell is frequently opened and closed, the hand feeling in the positioning process can be improved by utilizing the positioning matching of the concave and convex points, and the sealing performance of the upper shell and the lower shell is improved. The damping sense in the opening and closing process is increased through the magnets, and the positioning precision and the sealing degree are improved.

The invention discloses a high-damping NiTip / Al composite layer on the surface of an aluminum alloy and a preparation method of the high-damping NiTip / Al composite layer. NiTi particles are introduced into the surface of the aluminum alloy through a stirring friction machining technology, and the NiTip / Al surface composite layer is successfully prepared. The NiTip / Al composite layer on the surface of the aluminum alloy has excellent low-temperature and room-temperature damping performance, and the damping performance of the NiTip / Al composite layer is obviously superior to that of an aluminum matrix material. The maximum internal friction values of the surface composite layer can reach 0.0126, 0.0116, 0.0120, 0.0122 and 0.0105 respectively at room temperature (27 DEG C),-90 DEG C,-55 DEG C, 0 DEG C and 60 DEG C respectively, and are 2.17 times, 2.64 times, 2.31 times, 2.18 times and 1.78 times of the internal friction values of the corresponding aluminum matrix material respectively, and the internal friction values of the surface composite layer can reach 0.0126, 0.0116, 0.0120, 0.0122 and 0.0105 respectively at room temperature (27 DEG C),-90 DEG C,-55 DEG C, 0 DEG C and 60 DEG C. NiTi particles in different aging states are adopted as reinforcing phases, so that the damping performance of the surface composite layer can be effectively improved, and the phase change damping temperature zone of the surface composite layer can be regulated and controlled according to actual needs.

The invention discloses an immersive cinema dynamic content adaptation control method based on multi-modal fusion, and the method comprises the steps: collecting at least one non-contact physiological signal of a target audience seat area in real time, the physiological signal comprising a respiratory wave signal collected by a millimeter wave radar or a photoplethysmography signal collected by a near-infrared photoelectric sensor; performing time-frequency analysis on the physiological signal, and extracting a physiological wake-up characterization value in a current time window; the physiological wake-up characterization value comprises a heart rate variability change rate and a heart rate deviation value; constructing a dynamic damping adjustment model, and calculating a virtual damping coefficient of the seat movement system at the current moment based on the physiological wake-up characterization value; and the virtual damping coefficient is converted into an execution instruction of a seat motion controller, and damping force output of the motion platform is adjusted in real time. The technical problem that the pre-programmed motion feedback is disjointed with the real-time physiological and psychological state of the audience can be solved, the experience adaptability and comfort of the cinema seat are improved, and the system safety is improved.

The invention relates to an ejector pin strength detection device and method for automobile lamp injection mold production, and the ejector pin strength detection device comprises an ejector pin body, and further comprises a detection box, and a support plate and a first sliding seat which are fixed in the detection box, and the first sliding seat is slidably mounted on the support plate; a positioning assembly used for clamping an ejector pin body and a base are installed on the supporting plate, the base is fixed to the supporting plate, a sliding piece is installed on the base in a sliding mode in the length direction, an inclined piece is fixed to the end of the sliding piece, the sliding piece is connected with an adjustable resistance assembly installed on the detection box, and the adjustable resistance assembly is connected with the ejector pin body. When the reciprocating assembly drives the first sliding seat to reciprocate, the stepping assembly drives the adjustable resistance assembly to work, damping provided by the adjustable resistance assembly to the sliding piece is gradually increased, and simply, when the ejector pin body reciprocates every time, force provided by the inclined piece to the ejector pin body during testing is increased.

The utility model discloses a linkage paper limiter mechanism with a damping structure and a printer, and belongs to the technical field of printers, and the technical scheme is characterized in that the linkage paper limiter mechanism comprises a paper bin, the paper bin is provided with two sliding grooves, a left paper limiting block and a right paper limiting block are connected in the two sliding grooves in a sliding mode respectively, and a positioning column is arranged on the paper bin and located between the two sliding grooves; the positioning column is sleeved with a linkage gear, the linkage gear is rotationally connected with the positioning column, the left paper limiting block and the right paper limiting block are each provided with a linkage rack, the linkage racks are meshed with the linkage gear, the positioning column is in threaded connection with a bolt, an elastic piece is arranged between the bolt and the linkage gear, and therefore the linkage gear abuts against the paper bin. The paper bin damping device has the advantages that the linkage gear is pressed through the spring, the linkage gear abuts against the paper bin to form friction, and therefore the good damping effect is achieved, and the paper bin damping device is simple in damping structure, convenient to install, low in cost and high in reliability.

The invention relates to a particle damping and electromagnetic suspension mixed vibration isolation test platform and a working method thereof. The platform is divided into an upper platform part and a lower platform part, the upper platform part comprises an upper supporting frame, an electromagnet and a suspension vibration sensor, the suspension vibration sensor monitors the suspension vibration condition of the upper platform part and collects signals, and the signals are transmitted to a suspension vibration controller and drive the electromagnet to generate response electromagnetic force for active vibration reduction; suspension vibration isolation is achieved; the platform lower portion comprises a lower supporting frame, a hollow groove, damping particles and a vibration sensor, the vibration sensor monitors the suspension vibration condition of the platform lower portion, the vibration controller calculates the rigidity and damping which should be achieved, the number of the damping particles is controlled to change the rigidity and damping of the platform lower portion, and particle damping vibration attenuation is achieved. Compared with the prior art, the full-band vibration energy attenuation and vibration isolation device has the advantages of achieving full-band vibration energy attenuation and vibration isolation, being good in vibration isolation effect, stable, high in integration degree, high in flexibility, high in practicability and the like.

The utility model relates to the technical field of truss robots, and discloses a truss with an anti-collision structure, which comprises a mounting seat, the top end face of the mounting seat is fixedly connected with a truss body, the top end face of the truss body is fixedly connected with a truss robot, and the top end face of the mounting seat is provided with an anti-collision assembly. According to the truss with the anti-collision structure, the anti-collision plate is impacted to move, the sleeve rod shrinks into the anti-collision plate, so that the bevel edge of the triangle is shortened, the movable rod is pushed to move into the sleeve, the first spring absorbs impact force through elastic deformation and pushes the anti-collision plate to reset after being impacted, and the rubber strip improves damping between the movable rod and the sleeve; the impact force is relieved, the working precision and stability of the robot are protected, a part of impact force drives the mounting sleeve to longitudinally move through the supporting arm, the second spring is further elastically deformed, the impact force is absorbed and buffered, and the robot is protected against excessive impact.

The invention discloses a multifunctional intelligent electric meter verification device, and relates to the technical field of intelligent electric meter verification, the multifunctional intelligent electric meter verification device comprises a protection box, the front surface of the protection box is provided with a box door, the front surface of the box door is provided with a handle, the upper surface of the protection box is provided with a lifting handle, the protection box is internally provided with an electric meter verification instrument, and the exterior of the electric meter verification instrument is provided with a clamping assembly. Through cooperative arrangement of the protection box, the box door, the handle, the lifting handle, the electric meter calibrator, the clamping assembly, the calibration wire, the silica gel sleeve, the calibration connector and the damping assembly, the calibration connector is pulled downwards to pull out the calibration wire, and the calibration connector is used for being connected with a calibrated intelligent electric meter. According to the electric meter checking device, the electric meter checking instrument can be conveniently used for checking the intelligent electric meter, the electric meter checking instrument can be conveniently mounted and dismounted through the arranged clamping assembly, when the electric meter checking instrument is damaged, the electric meter checking instrument can be conveniently maintained and replaced, and the use effect of the electric meter checking device can be guaranteed.