50results about How to "Reduced vibration damping" patented technology

The invention provides a multi-field coupling energy-saving tuned mass vibration reduction device. By using power-electricity-magnetism-heat multi field coupling, aluminum sheets cut magnetic induction lines so as to change vibration mechanical energy into electric energy aiming at the vibration excitation of the external on an engineering structure, the aluminum sheets are fixed by using screws,the damping ratio can be adjusted by adjusting the distance between the aluminum sheets and a strong magnet, and a copper coil is fixed at the backs of the aluminum sheets to absorb energy which is generated by eddy current in the aluminum sheets, so current is generated in the copper coil; a nickel steel sheet is inserted into the copper coil to increase the magnetic flux density of the copper coil; the diameter and number of turns of the coil are adjusted, the number of the nickel steel sheet is increased, and the size of the nickel steel sheet is adjusted to ensure that current with different magnitudes is generated in the copper coil, so the damping ratio can be adjusted; and meanwhile, the current in the copper coil is stored in a storage battery in a charging way, so the power supply demand of structural illumination or sight can be met.

The invention provides a sand cushion isolation and shock absorption device for a comprehensive pipe gallery and a building method thereof. The sand cushion isolation and shock absorption device has the advantages of simple structure, convenience in construction, low cost of construction, high applicability and convenience in popularization and implementation. The sand cushion isolation and shock absorption device comprises a foundation isolation and shock absorption device and side wall isolation and shock absorption devices. The comprehensive pipe gallery is buried in a stratum and is formed by foundation mats at the bottom, side walls on the two sides and top plates at the top in a surrounded mode. A foundation isolation and shock absorption layer is arranged under the foundation mats of the comprehensive pipe gallery and is formed by packing coarse sand by earthwork cloth, and a rammed 37 lime earth layer is arranged under the foundation isolation and shock absorption layer. Side wall isolation and shock absorption layers are arranged on the earth meeting surfaces of the side walls of the comprehensive pipe gallery and are formed by packing coarse sand by earthwork cloth. The foundation isolation and shock absorption device and the side wall isolation and shock absorption devices surround the three surfaces of the comprehensive pipe gallery except for the top plates, thereby forming an isolation and shock absorption layer.

The invention provides an ocean platform vibration absorbing energy feedback device based on a nonlinear energy sink and belongs to the field of deepwater marine drilling platforms. The ocean platformvibration absorbing energy feedback device based on the nonlinear energy sink consists of a platform, a swaying-surging nonlinear energy sink and a heaving nonlinear energy sink. The swaying-surgingnonlinear energy sink is mounted around the platform so that the swaying and surging of the platform can be reduced; and the heaving nonlinear energy sink is mounted under the platform so that the heaving of the platform can be reduced; structures such as mass blocks, springs, straight shafts and linear power generators are arranged in the swaying-surging nonlinear energy sink and the heaving nonlinear energy sink; the linear power generators are placed between the mass blocks and the straight shafts; when the platform is subject to a load to generate motion response, the springs drive the mass blocks to move on the straight shafts in a reciprocating manner; in the process, the linear power generators between the mass blocks and the straight shafts convert the vibration energy into electric energy so as to generate electric energy, which can be used by the platform, while the ocean platform motion response is reduced; and therefore, energy is sufficiently utilized.

The invention belongs to the technical field of rubber vibration isolators, and relates to a special-shaped rubber shock absorber. The special-shaped rubber shock absorber comprises a variable-section rubber shock absorption mat, a rubber shock absorption flat mat and a special-shaped bolt. Vibration energy and impact energy are transformed into heat energy and deformation energy of rubber materials through deformation of a rubber part, and the functions of vibration isolation and buffering are achieved on a light electronic board. A small-diameter part of the variable-section rubber shock absorption mat is arranged in a hole of the electronic board, and the function of attenuating the dynamic energy, in the radial direction of the shock absorber, of the electronic board is achieved. The function of attenuating the dynamic energy in the axial direction of the shock absorber is achieved through a large-diameter part of the variable-section rubber shock absorption mat and the rubber shock absorption flat mat. The variable-section rubber shock absorption mat and the rubber shock absorption flat mat are arranged on the electronic board through the special-shaped bolt. Meanwhile, dynamic displacement of the shock absorber is limited, and the functions of limiting and mounting are achieved.

The invention discloses an underwater damper for an arched steel tower in a construction condition. The underwater damper is one of a drilling type, a closed opening type and an opening type, which are symmetrical structures: (1) the drilling type is as follows: drilling in the motion direction of the damper, utilizing water flowing through a pipeline to form turbulence, and increasing resistance with shearing stress of the pipe wall; (2) the closed opening type is as follows: punching on the surface of a cubic box body with a hole inside, un-punching on the top surface and punching on the other five surfaces so as to generate generates turbulence inside the box body by water flow to consume energy; (3) the opening type is as follows: using an un-flat surface including an I type or a Chinese character Wang shape, so as to increase disturbance of the damper to the flow field and increase the damping. The acceleration of a spring oscillator system with the underwater damper is attenuated quickly, so that the underwater damper designed by the invention achieves the effect of increasing the system damping, and the effect is very remarkable.

The invention discloses a rubber damper with the adjustable frequency. The rubber damper with the adjustable frequency comprises a top plate (1) and a base plate (2), wherein rubber plates (3) are arranged between the top plate (1) and the base plate (2). The rubber damper with the adjustable frequency is characterized in that upper baffles (4) are arranged on the lower end face of the top plate (1), lower baffles (5) are arranged on the upper end face of the base plate (2), each lower baffle (5) comprises two sub-baffles (6) which are arranged in a parallel mode, when the upper baffles (4) and the lower baffles (5) are buckled in an opposite mode, each upper baffle (4) exactly enters a gap (7) formed between every two adjacent sub-baffles (6), a gap is reserved between each upper baffle (4) and the base plate (2), a gap is reserved between each lower baffle (5) and the top plate (1), the number of layers of the rubber plates (3) is at least two, and a middle steel plate (8) is further arranged between every two adjacent rubber plates (3). The rubber damper with the adjustable frequency is simple in structure and exquisite in design, and the frequency of the rubber damper can be adjusted according to different frequencies of needed damping devices so that the rubber damper can adapt to the damping devices.

The invention provides an environment-friendly sewage treatment device for a construction site. The environment-friendly sewage treatment device comprises a base; a damping plate is movably mounted atthe top of the base; a traction column is fixedly mounted in the middle of the right side of the base; supporting legs are fixedly installed at the four corners of the two sides of the base. Oppositesupporting columns are fixedly mounted at the top of the damping plate. A treatment cylinder is fixedly mounted at the top of each supporting column; a sludge cavity and a treatment cavity are formedin the treatment cylinder; a filter plate is fixedly mounted on the inner wall of the treatment cavity, sludge wastewater poured into a sludge inlet can be filtered in the filter plate, a protectionblock is fixedly mounted on the right side of the top of the filter plate, and a first electric telescopic rod is fixedly mounted in the left end of the protection block, so that a push plate can be pushed by extension of the first electric telescopic rod to discharge residual sludge filtered on the filter plate into the sludge cavity through a through groove formed in the lower part of the outerwall of a sludge blocking wall in a sludge blocking device.

The invention provides an electric instead-of-walk vehicle rear hanging frame system with a worm wheel and worm rod adjusting the wheel base. In the system, both ends of a worm wheel of a worm wheel and worm rod mechanism are provided with output shafts which are mutually separated, coaxial with the worm wheel and driven by the worm wheel, the output shafts which are extended out of end covers of both ends of a shell of the worm wheel and worm rod mechanism are fixedly connected with an oscillating arm respectively, two rear wheels of the electric instead-of-walk vehicle are respectively arranged on one end of the corresponding oscillating arms, which are away from the output shafts. The two output shafts are elastic twisted rod shafts, which are fixedly connected with both ends of a worm wheel hub hole respectively. The mechanism is also provided with a friction disk, an inertia disk and an oil gap packing piece, and the oil gap packing piece brings the oil gap in which the viscous oil is filled. The system has the advantages of the adjustment of the wheel base between the front and the rear wheels, better damping performance and long service life, and a rider, particularly the elder or the disabled, can feel especially comfortable.

The invention discloses an aviation piston type engine driving torsional damper, which at least comprises a damper casing as an input component, a reducing gear as an output component and a fixed gear ring fixedly connected with the reducing gear, wherein the damping casing is connected with a crankshaft and commonly rotates along with the crankshaft; and at least two groups of elastic connecting keys are arranged between the damper casing and the fixed gear ring and are used for transmitting the toque to the reducing gear. By outputting the torque of the crankshaft by using two paths, the driving torsional damper has the functions of damping and increasing the damping, can reduce the torsional rigidity of a combined part of the crankshaft of the engine and a driving system and tunes the inherent frequency of torsional vibration of the driving system.

The invention discloses a hanging-type handheld vibrating plastering machine, and relates to a building plastering machine. The hanging-type handheld vibrating plastering machine is composed of a handheld vibrating plastering device, a sling, a hanging bracket and an electric winch. The handheld vibrating plastering device is connected with the hanging bracket and the electric winch through the sling. A high-frequency vibrator, a control handle and a controller are arranged on a machine body of the handheld vibrating plastering device. The handheld vibrating plastering device is connected withthe hanging bracket only through the sling to be hung on the lower portion of one end of a hanging arm of the hanging bracket. A constructor operates the handheld vibrating plastering machine throughthe control handle with the controller to make back and forth movement from bottom to top for construction. The electric winch is arranged on the hanging bracket constituted by a base, a vertical column and the hanging arm, and the hanging arm can rotate in the horizontal direction. The hanging-type handheld vibrating plastering machine has the characteristics of simple structure, flexible operation and high practicability.

The invention discloses an electromechanical hydraulic hybrid power transmission device for a cutting part of a coal mining heading machine. The device comprises an input shaft, a hydraulic torque converter, a first planet row, a clutch, a second planet row and a third planet row, wherein the hydraulic torque converter comprises a turbine and a pump wheel; the turbine is connected with the input shaft; the pump wheel is connected with a sun wheel of the first planet row; a planet carrier of the first planet row is connected with a driving disc of the clutch; a driven disc of the clutch is connected with the input shaft; a gear ring of the first planet row is fixedly connected with a sun wheel of the second planet row; a planet carrier of the second planet row is fixedly connected with a sun wheel of the third planet row; a planet wheel of the third planet row is connected with an output shaft. On the premise of taking the efficiency of a transmission system into full consideration, compared with a power transmission system for a cutting part of the existing coal mining heading machine, the electromechanical hydraulic hybrid power transmission device for the cutting part of the coal mining heading machine has the advantages that self-adaptive stepless speed variation is realized; a rock is broken forcibly through reflux power; safety protection is realized by the clutch; buffering and damping are realized by a hydraulic reflux speed-adjusting device.

The invention relates to a security unmanned aerial vehicle with undercarriage folding and unfolding functions and a high-definition shooting function. The unmanned aerial vehicle comprises a main body, a camera, four flight devices and four brackets, and further comprises a folding and unfolding mechanism and four supporting mechanisms, the folding and unfolding mechanism comprises a first cylindrical notch, a piston block, a first permanent magnet, a second permanent magnet, an air pressure sensor, a connecting rod and four air collecting assemblies, each supporting mechanism comprises a second cylindrical notch, an undercarriage, a buffer assembly, a spring, a third pipeline, a second electric valve, a second pipeline and a first electric valve, each air collecting assembly comprises anair collecting pipe, a third electric valve and a first pipeline, and each buffer assembly comprises an air conveying hole and an air bag. The buffering effect on the camera is achieved through the folding and unfolding mechanism, shaking of the camera is reduced, the shooting definition of the unmanned aerial vehicle is improved, shielding of the supporting mechanisms on shooting of the camera is reduced through folding and unfolding of the supporting mechanisms, and the practicability of the unmanned aerial vehicle is improved.

The invention relates to a polyurethane microporous elastic backing plate with ultrahigh strength and low dynamic and static stiffness ratio, and belongs to the technical field of microporous polyurethane. The elastic backing plate is obtained by curing and molding a component A and a component B; the component A is prepared by uniformly mixing PTMEG (polytetramethylene ether glycol) 1000, PTMEG 2000, BDO (butanediol), DEA (diethylene glycol), H2O, AK7703, BDMAE (butanediol), T12 and a carbon nano tube; the component B is a prepolymer with the-NCO value of 12-14, which is formed by stirring and reacting isocyanate and polytetrahydrofuran ether polyol for 4-6 hours at the temperature of 80-100 DEG C in a protective gas atmosphere; the molar ratio of the active-H contained in the component A to the-NCO group contained in the component B is (1.00: 0.98)-(1.00: 1.03). The polyurethane microporous elastic base plate has ultrahigh strength, proper static stiffness and lower ratio of dynamic stiffness to static stiffness, and can meet the use requirements of elastic base plates on special sections of heavy haul railways.

The invention relates to a polyurethane microporous elastic backing plate with high strength and low dynamic and static stiffness ratio, and belongs to the technical field of microporous polyurethane. The elastic backing plate is obtained by curing and molding a component A and a component B; the component A is prepared from PTMEG (polytetramethylene ether glycol) 1000, BDO (butanediol), H2O, AK7703, BDMAE (butanediol), T12 and a carbon nano tube; the component B is a prepolymer with the-NCO value of 12-14, which is formed by stirring and reacting isocyanate and polytetrahydrofuran ether polyol for 4-6 hours at the temperature of 80-100 DEG C in a protective gas atmosphere; the molar ratio of the active-H contained in the component A to the-NCO group contained in the component B is (1.00: 0.98)-(1.00: 1.03). According to the method, the component A and the component B are preheated and then poured, cured and formed. The polyurethane microporous elastic base plate has higher strength, proper static rigidity and lower ratio of dynamic rigidity to static rigidity, and can meet the use requirements of common road sections of heavy haul railways on the elastic base plate.

The invention provides a design method of a non-circular C-shaped damping ring with controllable contact pressure. Based on the design method, corresponding non-circular C-shaped damping ring free profiles can be designed according to different contact pressure requirements, so that the contact pressure depends on the gear rotating speed and also depends on profile deformation, and the problem that the contact pressure is uncontrollable under the designed rotating speed is solved; and the optimal contact pressure corresponding to the maximum vibration reduction efficiency of the damping ring can be obtained under the designed rotating speed. Based on the design method, the contact pressure between the damping ring and the gear is uniformly distributed, and the contact rate is high. When the vibration damper is installed in a gear, even contact pressure can be generated, the contact rate is high, and the situation that the vibration damping performance is reduced due to a non-contact area can be avoided.

The invention discloses a motor with anti-shake and damping functions. The motor comprises a base assembly, a bearing assembly and a pressure stabilizing shaft assembly, wherein the basic assembly islocated in the middle of the whole device, the bearing assembly is arranged on one side of the base assembly, the pressure stabilizing shaft assembly is arranged in the bearing assembly, mist in a pressure stabilizing tank can be slowly accumulated at the bottom of the pressure stabilizing tank under the action of gravity, water molecules are atomized through the water flow atomization assembly toform circulation of the water molecules, and the aerial fog mixture can effectively cool down a motor transmission shaft area while vibration isolation, and improve the continuous operation performance of the device.. The motor can effectively avoid the characteristics of poor vibration reduction and shock absorption effect of pure gas, low flow rate of pure liquid vibration reduction, easiness in accumulation and poor flexibility, can further avoid characteristics of poor stability of spring vibration reduction and easiness in driving surrounding objects to swing due to aftershock of the spring, and is stable in vibration reduction effect.

The invention discloses a hydraulic vibration reduction mechanism with variable restoration damping based on a swing motor, and belongs to the technical field of hydraulic vibration reduction. The hydraulic vibration reduction mechanism comprises a swing motor oil cylinder (1), an oil chamber is arranged in the swing motor oil cylinder (1), a swing motor rotating shaft (4) is arranged in the oil chamber, a blade (5) is connected to the swing motor rotating shaft (4), the swing motor rotating shaft (4) drives the blade (5) to swing in the oil chamber in a reciprocating mode, and at least one arc-shaped channel is formed between the blade (5) and the inner wall of the swing motor oil cylinder (1) at intervals. The hydraulic vibration reduction mechanism is characterized in that a one-way conduction mechanism is installed on the blade (5), and the one-way conduction mechanism is closed along with the restoration movement of the swing motor rotating shaft (4). According to the hydraulic vibration reduction mechanism with the variable restoration damping based on the swing motor, the one-way conduction mechanism is arranged on the blade, so that the flow area of oil is blocked to a certain extent during restoration, and the damping force value during restoration is changed.