92results 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 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 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 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 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 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 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.