94results about How to "Effective vibration reduction" patented technology

The invention provides an adjustable-inherent-frequency composite power vibration absorber and a control method of the adjustable-inherent-frequency composite power vibration absorber. The adjustable-inherent-frequency composite power vibration absorber comprises a signal collecting unit, a control unit and an executing unit, wherein the executing unit consists of two parts including a rigidity adjustment unit and a mass adjustment unit, the rigidity adjustment unit comprises a U-shaped base frame, excitation coils and a pre-tightening screw bolt are attached to the U-shaped base frame, a vibration absorption block is positioned between two magneto-rheological elastic bodies and is fixedly arranged between two clamp plates through the pre-tightening effect of the pre-tightening screw bolt, and a liquid storage box, a liquid pump and a liquid lower cavity are connected through a hose. The adjustable-inherent-frequency composite power vibration absorber and the control method have the advantages that the design structure is simple, the vibration absorption effect is good, an effective vibration reduction frequency band is wide, the performance is stable, the control response time is short, and practical values are very high; on the basis of the existing self-adaptation type vibration absorber, the effective vibration reduction frequency band is further widened, and the problem of too short effective vibration reduction frequency band of a traditional power vibration absorber is solved; the defect that an active type power vibration absorber excessively depends on external energy is overcome.

A fluid-filled vibration damping device wherein a partition member is formed by fitting an inner orifice member inside an outer orifice member with the members relatively displaceable. An orifice-defining window is provided on either one of an inside peripheral face of the outer orifice member and an outside peripheral face of the inner orifice member. An orifice passage is defined utilizing a zone being produced through partial covering of the orifice-defining window by the other of the outer orifice member and the inner orifice member. The covered zone of the orifice-defining window changes through relative displacement of the inner orifice member and the outer orifice member, so that a passage length along the orifice passage changes in association with change of the covered zone of the orifice-defining window.

A fluid-filled active vibration damping device including a partition member having a holding space formed therein and a movable membrane installed in the holding space. A filter orifice tuned to a higher frequency than an orifice passage is formed at one wall part of the holding space facing to one surface of the movable membrane, and the holding space is in communication with one of a pressure receiving fluid chamber and an excitation fluid chamber through the filter orifice. An open hole is formed on the other wall part of the holding space facing to the other surface of the movable membrane opposite to the one surface in the thickness direction, and the holding space is in communication with the other of the two fluid chambers through the open hole. A through hole pierces the movable membrane in the thickness direction.

The invention provides a vibration-damping seat which belongs to the technical field of machinery. The invention solves the technical problems of poor vibration-damping effect, easy exposure to directional influence of impact force and the like found in the vibration-damping seat of the traditional automobile. The vibration-damping seat comprises a lower supporting seat, an upper supporting seat and a backrest which is connected with the upper supporting seat, wherein an intersection component is arranged between both sides of the upper supporting seat and the lower supporting seat, a spring is arranged between the upper supporting seat and the lower supporting seat, and a plurality of dampers are symmetrically distributed between the upper supporting seat and the lower supporting seat. The vibration-damping seat can effectively damp the impact of the front direction and the back direction of the seat and has good applicability; buffering can be realized prior to vibration damping, and the vibration-damping effect is good; and the elevation of the backrest is adjustable, and the comfort of the seat is enhanced.

The invention relates to a wheel suspension for steered wheels of motor vehicles having a telescoping shock absorber which is preferably permanently connected to the wheel carrier and a helical compression spring which surrounds it and which is clamped between a lower spring plate which is preferably permanently connected to the shock absorber tube and an upper, body-side spring plate. According to the invention for vertical adjustment of the body around the shock absorber there is an actuator, and the actuator acts by way of an actuating pinion with the interposition of an axial anti-friction bearing on the upper spring plate.

The invention relates to a tramcar vibration-absorbing and noise-damping structure which is composed of a first rubber element, a second rubber element and a rail bottom cover. The first rubber element and the second rubber element are positioned on two sides of a grooved steel rail respectively, the rail bottom cover is wrapped at the bottom of the grooved steel rail, barbs extending inwards from the bottom of the grooved steel rail are arranged on two sides of the rail bottom cover to fix the rail bottom cover at the bottom of the grooved steel rail, and the first rubber element and the second rubber element are connected to the barbs on the two sides respectively. The tramcar vibration-absorbing and noise-damping structure is suitable for rail-bound grooved steel rails and applicable to different section forms, vibration-absorbing and noise-damping effect on a tramcar system can be effectively realized, and stray current between the grooved steel rail and concrete can be effectively isolated.

The invention provides a self-adaptive stable mounting device of a communication media displayer. The self-adaptive stable mounting device comprises a substrate, telescopic adjusters, a vibration reducer, a base, a first motor, a first connecting rod, a second motor, a second connecting rod, a third motor, a third connecting rod and a displayer mounting seat. When communication media jolt, vibration isolation and vibration reduction can be effectively achieved, and therefore vibration energy transmitted to the displayer is reduced; and real-time self-adaptive adjusting can be achieved, and therefore a user can keep the comfortable watching angle all the time, the visual comfort of the user is improved, and the service life of the displayer can be effectively ensured.

The invention belongs to the technical field of vibration control, and particularly relates to an aluminum alloy variable chamber particle collision damper for pipeline vibration reduction. The dampercomprises a pair of semi-circular ring column cavities, semi-circular ring cavity outer surface cover plates are arranged at the two ends of each semi-circular ring column cavity, a plurality of cavity inner unit partition plates are arranged inside each semi-circular ring column cavity, the plurality of cavity inner unit partition plates divide the interior of each semi-circular ring column cavity into a plurality of independent small cavities, and metal particles filled the small cavities. The metal particles inside the cavities can collide and rub against with one another along with a pipeline vibrated, so that the vibration energy of the system is consumed, wherein the filling rate of the metal particles inside the cavities is the main factor of affecting the vibration reduction effect of the pipeline. The damper is simple in structure, small in mounting space and remarkable in vibration reduction effect.

The invention relates to an inertial resistance type vibration absorber. The inertial resistance type vibration absorber comprises a sealed body, a piston mass block, two springs and an antifriction sealing device, the sealing body is a sealed cavity composed of an upper wall, a lower wall and a side wall, the upper surface and the lower surface of the piston mass block are of a symmetrical downward concave structure, axial damping holes are processed at the bottom of the downward concave structure, the piston mass block is hermetically connected with the side wall of the sealed body via the antifriction sealing device, the center of each of the upper side and the lower side of the piston mass block is connected with one spring, the other ends of the two springs are connected with the upper wall and the lower wall respectively, the two springs support the piston mass block in the middle of the sealed body, the piston mass block divides the sealed body into an upper cavity and a lower cavity, the damping holes of the piston mass block penetrate through the upper cavity and the lower cavity, and the liquid level forms an air chamber between the upper cavity and the upper wall after oil liquid fully fills the lower cavity. The inertial resistance type vibration absorber is capable of converting main vibration energy of equipment subjected to vibration reduction into kinetic energy of an inertial element of the inertial resistance type vibration absorber, and utilizes a self damping system to achieve substantial vibration reduction of the equipment and a system.

The invention provides a back-tilting preventive device for a boom, a control method of the back-tilting preventive device for the boom, and a crawler crane. The back-tilting preventive device for the boom comprises a variable damper (10), a sensor (20) and a processing system (30), wherein the variable damper (10) is arranged between the boom (40) and a base, the sensor (20) is arranged on the boom (40) and comprises a displacement sensor, an angle sensor and a speed sensor, and the processing system (30) is respectively connected to the sensor (20) and the variable damper (10) to obtain driving signals required by the variable damper (10) for controlling the boom (40) to move according to boom parameters detected by the sensor (20), and to transmit the driving signals to the variable damper (10). By means of the back-tilting preventive device for the boom, negative moment during operation of the boom can be effectively reduced, the boom can be well buffered and protected, and stability in operation of a boom system can be guaranteed.

The inventive plantar insole is characterised by bearing areas (6, 7, 8, 9) of the main surface which are provided with a rigidity or hardness which are less with respect to other areas (10-13) thereof. Said areas (6-9) are arranged under the major bearing areas of a foot, i.e. under toes, under the metatarsal heads, under the heel and under the external bearing area of the foot, thereby making it possible to attain a compromise between the necessity of an impact absorption and stabilisation of the foot in a shoe, and the insoles may be adapted to any type of footwear.

The invention discloses a floating platform movement inhibition system based on a small water line plane damping device. The floating platform movement inhibition system comprises more than one rotating body, wherein the area of the horizontal cross section of each rotating body is designed to be changeable in the vertical direction; each rotating body is fixed on a platform floating body structure; the upper bottom side of each rotating body is sealed or partially opened to communicate with the outside; the lower bottom side of each rotating body is opened and immersed into an external liquid and is communicated with the external liquid; the upper space of the rotating bodies is occupied by air to form an air chamber; the lower space of the rotating bodies is occupied by the external liquid to form a liquid column. The small water line plane damping device is fixed on the platform floating body structure, through optimized arrangement of the position of the damping device on the platform, the damping system can be within a relatively wide wave frequency domain, and a relatively good movement inhibition effect can be achieved. By adopting the system, under the condition that the mass of the platform is not greatly increased, the movement of the platform is effectively inhibited, the working environment of the platform is improved, and the manufacturing cost of the platform is greatly lowered.

The invention discloses a magneto-rheological vibration reduction structure for rotation transmission part. The magneto-rheological vibration reduction structure comprises an inner core and an outer shell which sleeves the inner core and matched with the inner core in a sealed manner. The inner core and the outer shell are of an annular structure. An annular passage I and an annular passage II which are communicated are peripherally disposed between the inner core and the outer shell. The annular passage I and the annular passage II are filled with magneto-rheological media. The vibration reduction structure further comprises an excitation source for generating a magnetic field to change the shearing yield strength of the magneto-rheological media. The excitation source corresponds to the annular passage II and is peripherally disposed on the inner core or the outer shell. The magneto-rheological vibration reduction structure is simple, good in vibration impact resistance, good in adaptability, capable of reducing abrasion of the rotation transmission part such as a bearing, a bearing block and a gear during transmission, capable of reducing noises, and capable of prolonging the service lives of the bearing block, the bearing, the gear and other connectors.

The invention discloses an offshore wind power device arbitrary-direction vibration absorbing system. The vibration absorbing system involves a shell, and vibration absorbing components, wherein the vibration absorbing components are arranged in the shell; each vibration absorbing component comprises a mass block, and damping blocks, wherein the mass block is arranged in the shell, the damping blocks used for damping are symmetrically arranged in the horizontal direction, the vertical direction and the height direction of the mass block, and the damping blocks are connected with the mass block; and each electromagnetic energy collection component comprises coils and magnets, wherein the coils are arranged on two opposite sides of the outside of the shell correspondingly, the vibration absorption components are located between the corresponding coils, and the magnets are arranged on the corresponding mass block. The offshore wind power device arbitrary-direction vibration absorbing system has the advantages of being simple in structure, good in vibration absorption performance and the like. The system belongs to the technical field of offshore electricity generation vibration control.

Disclosed is a vibration control apparatus of a driving system for a vehicle. More specifically, a toque command generating portion receives a demand torque from a driver and generates a torque command for operating a motor. A torque control portion receives the torque command from the toque command generating portion, collects information on exterior disturbances, and controls an actual torque of the motor accordingly. Lastly, a damping portion extracts and filters a vibration element generated due to operation of the motor by control of the torque control portion and generates a target torque to eliminate vibrations from the motor.

The invention discloses a rotary magnetic negative-stiffness vibration damper which comprises an outer cylinder. A first ball screw pair, a second ball screw pair and two working bodies are arranged in the outer cylinder. The axis of the first ball screw pair and the axis of the second ball screw pair are mutually parallel, and the first ball screw pair and the second ball screw pair are located between the two working bodies; two ends of each lead screw of the first ball screw pair and the second ball screw pair are both connected with rigid rods, and the four rigid rods penetrate through theworking bodies to be connected to the inner wall of the outer cylinder; the portions, located in the working bodies, of the rigid rods are provided with magnets; sliding grooves are located under thefirst ball screw pair and the second ball screw pair, and the inner walls of the sliding grooves are fixedly connected with nuts of the first ball screw pair and the second ball screw pair; the bottoms of the sliding grooves are provided with sliding wheels, and the sliding wheels can slide along the bottom of the outer cylinder back and forth; mass blocks are placed in the sliding grooves, grooves are reserved in the two sides, parallel to the axes of ball screws, of the mass blocks, and the grooves are matched with sliding blocks fixed to the inner walls of the sliding grooves; the two sides, perpendicular to the axes of the ball screws, of the mass blocks are connected with the sliding grooves through springs.

The invention discloses a damp magnesium alloy vibration isolation structure, comprising a high-damp magnesium alloy support and a balancing weight; the high-damp magnesium alloy support is of a wedge-shaped variable section rectangular bar of which the central slope is 1 degree to 2 degrees, and two ends of the high-damp magnesium alloy support are of planes; the thicker end of the high-damp magnesium alloy support is connected with a vibration isolation platform, and the other end of the high-damp magnesium alloy support is fixedly connected with the balancing weight. The invention also provides application of the high-damp magnesium alloy vibration isolation structure, by adopting the high-damp magnesium alloy vibration isolation structure, high-damp magnesium alloy vibration isolation structures are symmetrically installed outside the vibration isolation platform in the length direction, by adopting a bending deformation vibration isolation mode, vibration is transferred to the magnesium alloy support structure to reach the strain value, energy dissipation is achieved by utilizing the internal friction of materials, and thus vibration reduction is effectively realized. In a design method, the high-damp magnesium alloy vibration isolation structure adopts a wedge-shaped variable section structure, effectively utilizes the excellent vibration isolation properties of a magnesium alloy under a certain dynamic load, and can effectively improve the stability and precision of an instrument and equipment.

The invention discloses a high-damping dual-frequency power damping gear transmission device. The high-damping dual-frequency power damping gear transmission device comprises an engagement frequency damping mechanism and a shaft driving rotating frequency damping mechanism. The engagement frequency damping mechanism comprises first compression springs, a guide rod and a mass block. The guide rod is sleeved with the mass block. The two ends of the guide rod are fixed to a pair of support frames. The first compression springs are arranged between the mass block and the support frames. The shaftdriving rotating frequency vibration damping mechanism comprises the mass block, a bearing and second compression springs. The outer side of the bearing is sleeved with the mass block. An inner ring of the bearing is mounted on a bearing mounting sleeve of a base. Upper compression spring seats and lower compression spring seats are arranged on the inner side of the mass block. Middle compressionspring seats are arranged between the upper compression spring seats and the lower compression spring seats. The second compression springs are arranged between the middle compression spring seats andthe upper compression spring seats and between the middle compression spring seats and the lower compression spring seats. By the adoption of the high-damping dual-frequency power damping gear transmission device, under the rated operating condition of a system, the problems of medium-high-frequency vibration and noise caused by the gear engagement vibration and shaft rotation vibration in the gear transmission system can be remarkably reduced.

The invention discloses an active vibration damping platform for military computer application, comprising a connecting plate on which a military computer is arranged; a passive vibration reduction system which is arranged at the bottom of the connecting plate; an active vibration reduction system which comprises a detection module used for detecting vibration information of the active vibration reduction platform; an execution module arranged on the connecting plate and used for generating power for resisting vibration; a driving module connected with the execution module to drive the execution module to act; and a control module connected with the detection module and the driving module. The active vibration reduction platform for military computer application is provided with the passive vibration reduction system and the active vibration reduction system, effective vibration reduction of full-band vibration can be achieved through cooperation of the passive vibration reduction system and the active vibration reduction system, and omnibearing protection of a military computer is achieved.

The vibration isolator includes one top seat with one runner in the lower side, one bottom seat with one runner perpendicular to that in the top seat in the upper side, one sliding connecting unit between the top seat and the bottom seat, and at least one damping unit made of rubber or other material with high damping performance in the top seat, the bottom seat or the connecting unit. The present invention can isolate the horizontal transmission of vibration, absorb vibration energy transmitted in horizontal and vertical directions for effective vibration isolation and damping.

The invention discloses an assembled supporting shaft buffering fixing device. The assembled supporting shaft buffering fixing device comprises a fixing device body. An elastic washer is arranged in the center of the fixing device body. A first fixing hole and a second fixing hole are formed in the two sides of the fixing device body respectively. A first regulating bolt, a second regulating bolt and a third regulating bolt are arranged on the upper side of the fixing device body. The elastic washer can be replaced. Elastic plastics are arranged on the surface of the first fixing hole and the surface of the second fixing hole. Due to the fact that the elastic washer of the assembled supporting shaft buffering fixing device can be replaced, vibration can be reduced effectively, and the application range of the elastic washer is enlarged; when the elastic washer is used for a long time, elasticity is weakened, and the elastic washer can be conveniently replaced. In addition, due to the fact that the elastic plastics are arranged on the surface of the first fixing hole and the surface of the second fixing hole, stable connection is achieved, and vibration can be effectively reduced.

The invention discloses a damper. The damper comprises a working cylinder (1), the working cylinder comprises a cylinder body (2) and a piston rod (3), a valve seat (21) is arranged at one end of the cylinder body, the piston rod extends into the cylinder body from the other end of the cylinder body, a piston of the piston rod divides the cylinder body into a rod cavity and a rodless cavity, the damper further comprises a through-flow pipeline (4), a diversion trench (22), an adjusting valve (5) and a control motor (6), the rod cavity and the rodless cavity of the working cylinder are communicated with each other through the through-flow pipeline (4), the diversion trench (22) is formed in the valve seat and communicated with the through-flow pipeline, the adjusting valve (5) is arranged in the diversion trench (22) and used for adjusting flow, and the control motor (6) is used for controlling flow opening degree of the adjusting valve. The invention further provides a vibration damping control system and an automobile. By means of the technical scheme, the damper can be adapted to different automobile driving conditions, effective vibration damping and powerful and even rigid supporting are provided for the whole automobile body, sustained vibration, excessive pitching, excessive listing, even side turning and the like of the automobile body can be effectively prevented, and safe and stable operation of the whole automobile can be guaranteed.

The invention discloses a portable rotary forcer vibration reduction gear transmission device for a high-damping shaft. The device comprises a vibration reduction mechanism, wherein the vibration reduction mechanism comprises a semi-vibration reduction mechanism A and a semi-vibration reduction mechanism B which are identical in structure; the semi-vibration reduction mechanism A comprises a connecting plate, a fixed seat, balls, a pressure spring and a rotary mass block; the fixed seat is fixed with a driven shaft, the rotary mass block is installed on an outer ring of the fixed seat, and theplurality of balls are installed between the fixed seat and the rotary mass block in the arc direction, so that the rotary mass block only has the degree of freedom of rotating around a rotary central shaft; the end part of the fixed seat protrudes relative to the end part of the rotary mass block, the connecting plate is fixed on the end part of the fixed seat, and the pressure spring is installed between the connecting plate and the end part of the rotary mass block; and the semi-vibration reduction mechanism A and the semi-vibration reduction mechanism B are fixed through the connecting plate. When the system is in a rated operation condition, the device can obviously reduce the problems of medium-high frequency vibration and noise caused by the rotation of a gear shaft in a gear transmission system.

The invention discloses a vibration damping type transport case. The transport case comprises a case body, and a plurality of lifting rings are arranged on the left side wall surface and the right side wall surface of the case body. The transport case is characterized in that vibration dampers are arranged on the lower side of the case body, and electric push rod devices capable of automatically adjusting the front end and the rear end of the case body to a horizontal position are arranged on the lower sides of the vibration dampers. The transport case has the advantages of being simple in structure and convenient to use, the vibration dampers are additionally arranged, when on a bumpy road section, springs can provide an effective vibration damping function, so that the damage probabilityof cargoes can be lowered, and the electric push rod devices are additionally arranged, so that when the front height and the rear height of the transport case are different due to the fact that thesize and the weight of the transported cargoes are not equal, the electric push rod devices can automatically adjust the transport case to a horizontal position.

The invention discloses a detector. The detector comprises a detection head. The detection head is provided with a magnetic suspension shock absorber, a magnetic induction pedestal cooperated with the magnetic suspension shock absorber and a detection component arranged on the magnetic induction pedestal. The detection component is winded with an electromagnetic winding cooperated with the magnetic suspension shock absorber. When a magnetic field environment in the detection head is in a non-stable state, the magnetic suspension shock absorber stabilizes the magnetic field environment through controlling a current change in the electromagnetic winding and the magnetic induction pedestal. By using the detector, through arranging the magnetic field environment in the detection head, the magnetic suspension shock absorber is used to control stability of the magnetic field environment in the detection head so that stability of a work environment of the detection component can be guaranteed; even if the detection head generates vibration, the detection component can work in the stable work environment; a control effect is good; and a stabilization recovery process of the detection component is rapid so that effective damping on the detection component can be guaranteed.

The invention relates to a power generation device for a semi-trailer. The power generation device comprises steel plate supports, square axles, suspension supports, plate spring assemblies, bearing air bags and a pneumatic power generation system. The steel plate supports are installed on the square axles, and the square axles are located above the steel plate supports. Each suspension support is arranged between every two corresponding adjacent square axles, and the suspension supports are connected with the plate spring assemblies. The plate spring assemblies are fixed to the suspension supports through U-shaped bolts, and the two ends of the plate spring assemblies are connected with the steel plate supports. The upper ends of the bearing air bags are fixedly connected with a trailer frame, and the lower ends of the bearing air bags are fixedly connected with the steel plate supports. The pneumatic power generation system comprises one-way check valves, pneumatic motors, power generators and storage batteries. The bearing air bags communicate with the one-way check valves through air pipes. The one-way check valves communicate with the pneumatic motors through air pipes. The pneumatic motors are connected with the power generators. The power generators are connected with the storage batteries. The power generation device is simple in structure, convenient to use, capable of effectively utilizing electric energy generated by vibration of the semi-trailer and capable of reducing the oil consumption.

The invention relates to a spring damping mechanism with a quick locking function. The spring damping mechanism with the quick locking function comprises a base, an installation seat and two guide rods, wherein two base guide rod supports are fixedly connected to each of two sides of the base; two installation seat guide rod supports are fixedly connected to each of two sides of the installation seat; one installation seat guide rod support on each side is located between the two base guide rod supports located on the same side; a base guide rod support hole is formed in each base guide rod support; an installation seat guide rod support hole is formed in each installation seat guide rod support; each guide rod sequentially penetrates through the base guide rod support holes and the installation seat guide rod support holes in one same side; and a damping device is arranged between each base guide rod support and the corresponding installation seat guide rod support. The spring dampingmechanism with the quick locking function further comprises a locking device, wherein a quick clamping device is arranged on the bottom part of the base. The spring damping mechanism with the quick locking function has the beneficial effects that the guiding and damping problem can be solved at the same time, the stability of an equipment optical shaft and the reliability of the equipment under the severe environments such as strong vibration shock are guaranteed, and the base can be quickly locked on a weapon system.

The invention relates to the field of medical equipment, in particular to a patient transfer cart capable of damping vibration when encountering obstacles. The patient transfer cart comprises a cart body, an infusion stand is mounted on the cart body, a wheel disc is connected on the cart body through a bearing, a plurality of supporting rods are connected on the wheel disc, the other end of eachsupporting rod is provided with a sleeve, each supporting rod is arranged in the corresponding sleeve in a sleeved manner, and damping springs are connected between the supporting rods and the sleeves; the patient transfer cart comprises a damping wheel, and one ends, away from the supporting rods, of the sleeves are connected with the damping wheel. The patient transfer cart can effectively dampvibration when encountering high protrusions, and the problem that existing carts cannot damp vibration when encountering the high protrusions is solved.