169results about How to "To achieve the effect of vibration reduction" patented technology

The invention relates to a magnetic fluid damping device, which is suitable for damping long objects in spacecrafts and solves the problem of the damping of the long objects in the spacecrafts. The device comprises a non-magnetic shell (2), magnetic liquid (3), a permanent magnet (4), a nut (5), an end cover (6), a bolt (7), a screw (9), a sealing gasket (10) and an O-shaped seal ring (11). The parts are connected in a way that: the permanent magnet (4) is arranged in the non-magnetic shell (2); the end cover (6) with the O-shaped seal ring (11) is fixed to one end of the non-magnetic shell (2) by the bolt (7) and the nut (5); the magnetic liquid (3) is filled into the non-magnetic shell (2) by a threaded hole (8); and the non-magnetic shell (2) is sealed by the screw (9) and the sealing gasket (10). The device is sensitive to inertia force, can perform damping on the vibration with the characteristics of low frequency, small displacement and low accelerated speed, and has long service life and simple assembly method.

The invention discloses a vibration isolation installation device for electric equipment, comprising a base, the upper surface of the base is fixedly connected with a housing, the lower surface of the inner wall of the housing is fixedly connected with the lower surface of the movable block through a first spring, The left and right sides of the movable block are respectively fixedly connected with the opposite surfaces of the two first sliding devices, and the two first sliding devices are set on the left and right sides of the inner wall of the housing respectively, and the upper surface of the movable block is connected by a connecting rod It is fixedly connected with the upper surface of the inner wall of the groove, the same second spring is sleeved on the surface of the housing and the connecting rod, the groove is set on the lower surface of the box body, and the upper surfaces of the two side walls of the housing are fixedly connected and limited bit blocks. The vibration isolation installation device for electric equipment reduces the vibration generated by electric equipment through the mutual cooperation between the double-axis motor, threaded column, threaded cap, extrusion plate, baffle plate, connecting rod, movable block and first spring. noise, which facilitates people's lives.

The invention relates to a dynamic vibration absorber capable of reducing vibration levels of pipelines and a method for designing the dynamic vibration absorber, and belongs to the technical field of vibration absorption. The dynamic vibration absorber comprises a first pair of pipeline clamps (1); the pipeline clamps (1) are connected with each other by first bolts (2) and first nuts (3); N spring strips (4) are uniformly mounted on the outsides of the pair of pipeline clamps (1); additional mass blocks (7) are mounted at the tail ends of the spring strips (4); the N ranges from 3 to 6. The dynamic vibration absorber and the method have the advantages that the dynamic vibration absorber is simple in structure, easy to install and high in reliability, and vibration of various pipeline systems can be effectively reduced.

The invention provides a track board with periodic structure characteristics. The track board is formed by overlapping multiple layers of periodic sub-structures; the adjacent periodic sub-structures are made of different constituent materials, the thickness sizes of all layers of periodic sub-structures are determined according to the height of a track and the damping effect requirement, and damping is achieved based on an elastic wave band gap principle. The thickness sizes of all layers of periodic sub-structures are equal. The thickness sizes of all layers of periodic sub-structures are consistent with focused vibration wavelengths so that the damping effect can be improved, and damping is achieved based on the elastic wave band gap principle. A track board damping system with the periodic structure characteristics comprises the track board, buckle systems, steel rails, a base, a CAM mortar layer and a boss; the steel rails are fixed to the track board through the buckle systems; and the track board is arranged on the base through the CAM mortar layer and is continuously laid in the line extension direction. The track board damping system can be used for urban rail transit, high-speed railways, heavy haul railways and common railways. Damping and noise reduction control over urban rail transit, the high-speed railways, the heavy haul railways and the common railways is facilitated, and meanwhile the beneficial effects of being simple in structural style and convenient and flexible to construct and maintain are achieved.

The invention discloses a hybrid shock absorber based on a Stewart structure. The hybrid shock absorber comprises an upper top plate, a lower bottom plate and six shock absorption units obliquely arranged between the upper top plate and the lower bottom plate in the circumferential direction. The upper end of each shock absorption unit is connected with the upper top plate through an upper rod endjoint bearing, and the lower end of each shock absorption unit is connected with the lower bottom plate through a lower rod end joint bearing. Every two adjacent shock absorption units are mutually symmetrical, and the included angles between the shock absorption units and the upper top plate and the included angles between the shock absorption units and the lower bottom plate are all equal. Theshock absorption units comprise upper end covers, lower end covers, upper diaphragm springs, magnetic eddy current dampers and lower diaphragm springs, wherein the upper diaphragm springs, the magnetic eddy current dampers and the lower diaphragm springs are sequentially connected from top to bottom. The upper end covers and the upper diaphragm springs are fixed to the upper sides of the magneticeddy current dampers from top to bottom, and the lower diaphragm springs and the lower end covers are fixed to the lower sides of the magnetic eddy current dampers from top to bottom. Through matchedusing of the diaphragm springs and the eddy current dampers, the shock absorption effect is greatly enhanced, the whole hybrid shock absorber is a simple in structure, and six-degree-of-freedom shockabsorption can be achieved.

The invention relates to the technical field of vibration reduction of elevator guide rails, in particular to a guide rail module with the vibration damping function. The guide rail module with the vibration damping function comprises a T-shaped guide rail, wherein a vibration absorption damping bar in the length direction of the guide rail is installed on the back side of the guide rail, a notch is formed in the middle of the vibration absorption damping bar, a power vibration absorption mechanism which is arranged according to the first-order natural frequency of the guide rail is further installed on the back side of the guide rail, the power vibration absorption mechanism mainly comprises an L-shaped support, a vibration absorption spring and a vibration absorption mass block, the L-shaped support is embedded in the notch and fixed to the back side of the guide rail, the vibration absorption mass block is placed on the transverse beam of the L-shaped support, one end of the vibration absorption spring is connected with the vertical beam of the L-shaped support, and the other end of the vibration absorption spring is connected with the vibration absorption mass block. With the guide rail module with the vibration damping function, the maximum amplitude can be reduced, and also, the effect of reducing vibration is achieved.

A vibration damping structure and a vibration damping pad with a layered periodic structure, the thickness direction of the vibration damping pad is composed of several layered periodic units, and the layered periodic unit includes several layers of periodic substructures superimposed on each other, Adjacent periodic substructures are composed of different materials; the periodic substructures can also be provided with several periodic substructures in the length and width directions. The damping pad with layered periodic structure features is placed between the concrete sleeper or track slab bearing platform and the rail bottom, and is fixed by a fastener system; the rail vibration damping pad and the sleeper or track slab bearing platform Iron backing plates can also be set between them to improve their supporting strength. The rail damping pad can be used in urban rail transit, high-speed railway, heavy-duty railway, ordinary railway, building structure, machine equipment and bridge structure, which is helpful for its vibration and noise reduction control, and has a simple structure and easy maintenance. Advantages of convenience and flexibility.

The invention belongs to the technical field of building structures for offshore platforms, and relates to a self-resetting jacket offshore platform structure system based on a built-in swing column.The system comprises a offshore platform, rigid chain rods, springs, the swing column, a spherical hinge support, a tuned mass damper and metal dampers; the bottom end of the offshore platform is fixedly arranged on a foundation, and the swing column is arranged at the center positions of the interiors of jackets and is hinged to the seabed foundation through the spherical hinge support; the swingcolumn adopts a novel sleeve structure system, the position between an inner column body and an outer pipe is filled with a viscoelastic damping material, and the tuned mass damper is arranged at thetop end of the column; and the rigid pull rods or the springs are connected to the swing column and the offshore platform through the metal dampers outside the swing column. The system has the advantages that the swing column controls large displacement and large deformation in all the directions of the offshore platform, so that the interlayer deformation tends to be uniform, an offshore platform structure is integrally stressed, the overall collapse of the offshore platform caused by local buckling failure can be avoided, and therefore a better damping effect is achieved.

The invention discloses a pipe clamp with a vibration absorption structure for an automobile, which comprises an installing part and a holding part which are combined into a whole through injection molding, wherein the installing part is provided with a bolt installing hole; the holding part comprises a pipe clamp cover and a pipe clamp seat; one side of the pipe clamp cover and one side of the pipe clamp seat are flexibly hinged, and the other sides are mutually locked and connected; a clamping hole for clamping a pipe is surrounded between the pipe clamp cover and the pipe clamp seat; shock absorption pads are respectively installed on the inner walls of the clamping hole of the pipe clamp cover and the pipe clamp seat; and the shock absorption pads are in contact with the clamped pipe. The pipe clamp disclosed by the invention can reduce the vibration which is transferred to the automobile body from the pipe, has the advantages of adjustable vibration absorption effect of the pipe clamp, simpleness and convenience in assembling, difficulty in drop and adjustable pull-insertion force, can be repeatedly used and can meet the requirement that the assembling of pipes with different pipe diameters does not need to redevelop the integral pipe clamp.

The invention provides a multilayer tuned liquid damper which is composed of damper chamber units, liquid, blades and connecting nodes. The damper chamber unit has an annular structure. The liquid is injected into the chamber. A plurality of blades are fixed in the chamber. The upper end of each blade is hinged with top of the damper chamber unit, and the lower end is connected with the damper chamber unit through the connecting node. A plurality of damper chamber units are stacked together in a vertical direction, thereby forming an integral member, wherein the integral member is placed on top of an offshore wind turbine spar-type floating foundation. Under the function of factors such as sea surface wave, a pitching angle is reduced through shake of the liquid in each damper chamber unit, thereby realizing a purpose of energy dissipation.

The invention relates to a cradle head structure, comprising a first cradle head seat, a second cradle head seat, a ball, a spring, a ball seat and a release rod, wherein a ball seat can be rotatablely arranged on the first cradle head seat and limits a containing space for containing the ball with the first cradle head seat together; the ball seat comprises a connecting rod; the second cradle head seat is arranged on the first cradle head seat in a covering manner; the spring is pressed between the connecting rod of the ball seat and the second cradle head; and the tension of the spring presses the ball seat towards the direction of the first cradle head seat by the connecting rod, so as to fix the ball. The release rod can be rotatablely arranged on the first cradle head seat. The release rod rotates when being stressed and has mutual effect with the connecting rod of the ball seat, the connecting rod is pushed towards the direction of the second cradle head seat and the pressing ofthe ball seat to the ball is loosened. The cradle head structure has simple and small structure, convenient use, disassembling and assembling, only needs to use two hands to hold at one end of the cradle head structure, can adjust the direction of the ball by easily applying force and further adjusts the direction of optical equipment of the cradle head support; and simultaneously the structure has the advantages of vibration reduction and stable structure.

The invention relates to a vibrating lycium chinensis harvesting vehicle, and solves the defect that a lycium chinensis harvesting device cannot meet actual use requirements compared with the prior art. A scissor lifting platform comprises a scissor frame, the top of the scissor frame is fixedly mounted on the bottom of a chassis, the bottom of the scissor frame is fixedly provided with a liftingplatform assembly, a vibrating harvesting assembly is mounted on the lifting platform assembly, a lycium chinensis storage assembly comprises a skirt conveyor belt and a collection box mounted on a high ground clearance body, the skirt conveyor belt is mounted on the bottom of the lifting platform assembly by a connecting rod, a blanking end of the skirt conveyor belt is located below the vibrating harvesting assembly, and a feed end of the skirt conveyor belt is located above the collection box. The vehicle can carry out multi-point clamping opposite vibrating harvesting for large-area lyciumchinensis fruits of different varieties and ages, and can operate multiple lycium chinensis trees simultaneously.

The invention discloses a road vibration isolation system for preventing underground spatial structure vibration and a construction method thereof. A steel spring floating plate is arranged between the roof of a building in an underground space and an asphalt pavement as a travelling pavement above the roof, through spring shear stiffness of spring vibration isolators and compression stiffness of flexible water stopping materials at left and right sides of the floating plate, floating plate vertical support and lateral support stiffness is formed, through a shear hinge and the flexible water stopping materials at front and rear ends of the floating plate, floating plate vertical deformation and smooth longitudinal stability without mutation are realized, and the flexible water stopping materials, kerb drainage ditches and longitudinal drainage ditches are arranged so that accumulation of rainwater in gaps between the floating plate and a slope surface layer is avoided and rainwater-caused corrosion damage to the spring vibration isolators is prevented. The road vibration isolation system can prevent road traffic-caused underground spatial structure vibration, has good vibration isolation effects, can reliably work in an outdoor environment for a long time and is convenient for construction.

The invention relates to a modular adjustable-parameter dynamic vibration absorber and a parameter presetting method thereof, and relates to an adjustable-parameter dynamic vibration absorbing device. The dynamic vibration absorber comprises a base, a linkage seat, hinge supports, lever lower arms, lever upper arms, a fine-tuning spring, guide rails, a mass block, a tray, main springs, a fine-tuning damper, a main damper, and parallel holes. The base and the linkage seat are connected through bolts, and the hinge supports are connected with the linkage seat through bolts. The springs and the dampers are in modular structure. The lever lower arms are connected with the lever upper arms through connecting shafts. The tray is hinged with the lever upper arms through connecting blocks and connecting shafts. The mass block is fixed on the tray through locking bolts; sliding channels are reserved on the tray, a sliding pair can be formed by the sliding channels and the guide rails, and the tray is connected with the main damper and the main spring. The linkage seat is connected with the main damper and the main spring, and the tray is provided with parallel shafts. The invention aims to overcome defects of unexpected portability, unadjustable parameters and the like of existing dynamic vibration absorbers.

The invention discloses an automobile shock absorber with a cushioning structure, which comprises a piston rod, a working cylinder, a liquid storage barrel and a connector, the working cylinder and the liquid storage barrel are coaxial with the piston rod, and are connected together through the connector, the piston rod is arranged in the working cylinder, the bottom of the working cylinder is provided with a bottom valve, the piston rod is provided with a stop block, the automobile shock absorber also comprises the cushioning structure, which comprises an outer shaft sleeve and an inner shaft sleeve, the outer shaft sleeve is sleeved on the lower part of the inner shaft sleeve, the upper end of the inner shaft sleeve is tapered, the piston rod passes through the lower ends of the inner shaft sleeve and the outer shaft sleeve, and a piston valve is fixed on the piston rod by a nut. The automobile shock absorber not only can achieve a shock-absorbing effect, but also can adjust the anti-rolling performance, tractive performance and steering feedback performance of a vehicle in a wider range.

The invention discloses a well drilling self-excited vibration and stick-slip vibration simulation experiment device. A stepping motor rotates to drive a sliding block and a servo motor to feed downwards; a drill bit downwards cuts a simulated rock stratum material in a barrel-shaped container; rotation speeds and torques of the stepping motor and the servo motor can be transmitted into a notebookcomputer through a motor driver and a motor controller. A pressure sensor, a torsion sensor, a photoelectric sensor and an ultrasonic displacement sensor which are installed on a bottom plate transmit cutting force, torsion, rotating speed and drilling speed of a drill bit to a notebook computer through a data acquisition card so as to simulate a real drilling working process, and reference basesare provided for analysis of self-excited vibration and stick-slip vibration of a drill stem through the data.

The invention relates to a wind resistance and vibration reduction hanging basket for aloft working. The hanging basket comprises sliding guide wheels and further comprises a TLD water tank. The sliding guide wheels are fixedly mounted on the outer side of the side wall of the hanging basket and used for sliding on the structure surface. The TLD water tank is fixedly mounted inside the hanging basket and clings to the side wall of the hanging basket. The quantity and structure sizes of MTLD devices are obtained according to the design of the wind speed, hanging basket self frequency and liquid oscillation frequency in working. Good vibration reduction performance of the MTLD devices is utilized to reduce small-amplitude vibration in the construction work process and large-amplitude vibration caused by strong wind of the hanging basket. The novel hanging basket has the advantages that the structure is simple; the price is low; arrangement and maintenance are convenient; the vibration of the hanging basket is effectively reduced; security of constructors in the hanging basket is guaranteed; the impact load caused by the hanging basket to the building enclosures such as high-rise buildings is reduced; and meanwhile, the working efficiency and working quality of aloft working are improved.

The invention discloses a vibration reduction device and a vehicle pipeline vibration reduction system. The vibration reduction device is used for connecting a fixing component with a vibration component and comprises a main body and a connection rod, wherein the main body comprises a fixing part connected with the fixing component and connection parts connected with the vibration component; a plurality of connection parts are arranged and are used for connecting a plurality of positions of the vibration component; at least one of the plurality of connection parts is connected with the connection rod and is connected with the vibration component through the connection rod; a damping mechanism is arranged between the connection part and the connection rod and is used for supplying damping force to the connection rod; vibration of the vibration component is transmitted to the damping mechanism through the connection rod along an axial direction; through cooperation of the connection rodand the damping mechanism, vibration energy of the vibration component can be gradually absorbed by the damping mechanism, so that the vibration reduction effect is achieved. The vehicle pipeline vibration reduction system comprises the vibration reduction device. The vibration reduction device is arranged in a vehicle pipeline; the vehicle pipeline forms the vibration component; and NVH performance of the vehicle can be improved.

The invention discloses a hazard source identification method based on building BIM model, comprising the following steps: S1, collecting information of construction, including geographic information,quantity of construction object, current construction condition, master plan, civil structure, construction diversion, on-site traffic, camp arrangement, sorting out the collected information, converting it into digital information, and establishing database. The present invention is advantageous to better identification of hazard sources, Increase efficiency, and the identification effect is better after the hazard source is visualized, so that people can have a deeper understanding of the hazard sources, help managers manage effectively, As the leak item of the hazard source identificationis prevented, the management personnel are convenient to search and manage, the angle of the display screen is adjusted in real time accord to the actual situation, the hazard source identification isconvenient and better, the vibration caused by the lifting and lowering of the sleeve is reduced, the loss of the device is reduced, the service life is prolonged, and the cost is reduced.

The invention belongs to the technical field of vibration reduction, and discloses an intelligent self-adaptive vibration reduction system. The system comprises an outer sleeve composed of a U-shapedplate and a metal outer frame; the two sides of the U-shaped plate are embedded in the metal outer frame, and the interior of the U-shaped plate is connected through a crossed pressure-resistant plate; the middle parts of the crossed compression-resistant plates are hinged; the middle parts of the crossed clamping and pressing plates are respectively connected with the U-shaped plate and the metalouter frame through first damping springs; second damping springs are symmetrically welded to the left side and the right side of the crossed compression-resistant plate. Four end parts of the crossed pressure-resistant plate are in sliding connection with the U-shaped plate and the metal outer frame through sliding blocks and limiting springs respectively. The system is simple in structure and convenient to machine, and the elastic potential energy of the damping spring and the limiting spring, the friction force of the damping plate, the air compressibility of the air spring structure, theviscosity change of magnetorheological fluid in the magnetorheological damper, the repulsion effect of the electromagnet and the like are utilized; therefore, the vibration reduction system has the advantages of being good in vibration reduction effect, high in reliability and capable of achieving autonomous control.

The invention provides a vibration reduction wire formed by combining aluminum clad steel cores and aluminum-alloy twisted wires.Natural vibration frequencies of all layers of the aluminum alloy wires and aluminum clad steel cores are different and are mutually interfered, and therefore aeolian vibration energy is automatically consumed, and the vibration reduction effect is achieved.The vibration reduction wire comprises an inner core conductor and outer layer conductors, the inner core conductor is formed by twisting multiple aluminum clad steel wires, the outer layer conductors comprise at least two layers, each layer of the outer layer conductors is formed by combining multiple sections of aluminum alloy wires with the same radian, the outer layer conductor on the innermost layer forms an enclosed first circular ring surface structure in a combined mode, each layer of the outer layer conductors forms the corresponding enclosed circular ring surface structure in a combined mode, the outer layer conductors of the relative-inner layer are arranged in a circular inner cavity formed by the enclosed ring surface structure composed of the outer layer conductors of the adjacent relative-outer layer, and the inner diameter of the enclosed ring surface structure composed of the outer layer conductors of the adjacent relative-outer layer is large than the outer diameter of the enclosed ring surface structure composed of the outer layer conductors of the relative-inner layer.

The invention discloses an air conditioner compressor rotating speed fluctuation suppression method. The method includes processes of controlling a compressor according to real-time angular velocity and moment. The process of controlling the compressor according to the real-time angular velocity includes the following steps: filtering axis errors to obtain an angular velocity compensation amount;obtaining a compensated angular velocity output amount according to the angular velocity compensation amount; and correcting the real-time angular velocity according to the compensated angular velocity output amount and controlling the compressor; The process of controlling the compressor according to the moment includes the following steps: calculating a difference between a target angular velocity fluctuation amount and the compensated angular velocity output amount to obtain a first angular velocity difference; filtering the first angular velocity difference to obtain filtered angular velocity; inputting the filter angular velocity into a speed loop regulator to obtain output moment; obtaining a moment compensation amount according to the first angular velocity difference; and obtainingcompensated output moment according to the moment compensation amount and the output and controlling the compressor. The effectiveness of compressor rotating speed fluctuation suppression can be improved by applying the air conditioner compressor rotating speed fluctuation suppression method.

The invention discloses an automobile shock absorber. The automobile shock absorber comprises an oil storage cylinder, a working cylinder, a piston rod and a buffer device. The working cylinder is arranged in the oil storage cylinder, the upper portion of the working cylinder is connected with the upper portion of the oil storage cylinder through a connecting piece, and a bottom valve is arrangedat the bottom of the working cylinder; the piston rod is movably arranged in the working cylinder, a piston valve is arranged at the bottom of the piston rod, and the piston rod is coaxial with the working cylinder; and the buffer device is arranged in the middle of the piston rod, and the buffer device comprises a pair of shaft sleeves, a pair of belleville springs, an upper compression member, aspring, a lower compression member and a floating bushing. According to the automobile shock absorber, because the structure is adopted, the shock absorbing effect can be achieved, and the rollover performance, the traction performance, the steering feedback performance of an automobile can be adjusted in a larger range.