951 results about "Vertical vibration" patented technology

The invention relates to a shock absorber and a shock absorption system, and belongs to the technical field of precise shock absorption. The shock absorber comprises a base, a top plate, a piston and a supporting piece, a cavity is formed in the side, facing the top plate, of the base, the piston is connected with the base in the cavity in the mode that the piston can move in the depth direction of the cavity, the piston and the cavity are sealed to form a sealed cavity, the piston is connected with the top plate through the supporting piece, and therefore the pneumatic assembly with the vertical vibration reduction function is integrated in the vibration damper. The air cavity and the piston of the pneumatic assembly are both arranged at the bottom of the shock absorber, so that the air cavity and the piston are prevented from occupying the space between the base and the top plate in the shock absorber, and due to the fact that the area of the area, where the air cavity can be arranged, of the shock absorber base is larger, the shock absorber base can be more compact under the condition that the thickness of the base is not increased or slightly increased. The air cavity and the piston are arranged in the shock absorber base, so that the device integration density can be improved, the space can be compact, and miniaturization and multi-functionalization of the shock absorber are facilitated.

The invention relates to the technical field of data processing, and discloses an environment detection analysis method and system based on a simulation micro-motion signal excitation generator. The method comprises the following steps: generating a vertical vibration signal through an integrated structure of a constant-resistance vibration exciter and a special coupling base; performing multi-band signal excitation and station arrangement according to the frequency parameter combination; filtering and normalizing the original signal, and calculating a spatial autocorrelation coefficient; a frequency dispersion curve is extracted through an SPAC method; inverting an underground S-wave velocity structure by using a divergence genetic algorithm; and analyzing the speed abnormal region by adopting an edge detection algorithm, and determining the position and state of the box culvert body. According to the invention, high-precision non-destructive detection of the buried power pipeline box culvert body is realized in an urban complex underground environment.

The invention discloses a bionic TENG sensor unit for an artificial throat and a preparation method thereof, and relates to the field of artificial throats, and the sensor unit comprises a gradient micro-dome friction layer, a strain amplification layer, an electrode layer and a back cavity substrate layer. The gradient micro-dome array realizes gradual contact through gradient change of height and diameter; the strain amplification layer converts vertical vibration into horizontal strain by using a cantilever beam-sliding block structure; the back cavity array selectively amplifies vibration at a specific frequency based on the Helmholtz resonance principle. The invention further provides a corresponding preparation method. The preparation method comprises the steps of back cavity forming, electrode deposition, microstructure manufacturing, surface treatment and the like. The sensor has the advantages of high sensitivity, good frequency selectivity and strong durability, and is particularly suitable for detecting weak laryngeal vibration signals of laryngeal patients.

The invention discloses a locomotive wheel polygon damage detection method based on a lightweight neural network, and the method comprises the steps: obtaining axle box vertical vibration acceleration response signals of a heavy-load locomotive under the combination of different operation speeds and different wheel polygon abrasion degrees, and carrying out the preprocessing of the signals, the method comprises the following steps: acquiring frequency domain characteristics of a signal through fast Fourier transform, constructing a sample data set based on the frequency domain characteristics, constructing a wheel polygon damage detection network model, training the model by using the sample data set, and identifying a wheel polygon abrasion amplitude by using the trained polygon damage detection network model. And completing damage detection of the polygon of the wheel. The method can realize accurate and quantitative detection of the polygon abrasion degree of the heavy-load locomotive wheel, has the characteristics of accuracy, high efficiency and strong robustness, and also has relatively good interpretability.

The invention belongs to the technical field of ocean engineering, and particularly provides an offshore floating platform and a modular multifunctional offshore floating platform system.The offshore floating platform comprises a main body structure layer, a building module layer and a floating body layer, and the main body structure layer is provided with a plurality of buffer assemblies; the buffering assembly comprises a fixing sleeve, a supporting rod and a buffering mechanism. The buffer mechanism is arranged in the fixed sleeve, a flowing gap is reserved between a lantern ring of the buffer mechanism and a vertical rod of the I-shaped section of the supporting rod, and the flowing gap is filled with magnetorheological fluid; the lantern ring comprises a middle fixed section, a first flexible section and a second flexible section; the first pneumatic sleeve is positioned on the outer side of the first flexible section; the second pneumatic sleeve is positioned on the outer side of the second flexible section; and the winding coil is wound on the circumferential outer wall of the middle fixed section. The offshore floating platform can counteract vertical fluctuation energy caused by the action of waves or tides in real time, so that vertical vibration of the offshore floating platform can be buffered, the stability and safety of the building module layer are ensured, and the offshore operation difficulty is reduced.

The invention provides a rail transit environment vibration directional control method and system using a wedge-shaped tree array. According to the method, ground surface vertical vibration caused by passing of a train beside a certain ballast track is calculated by constructing a semi-analytical three-dimensional dynamic response model, simulation of the tree vibration reduction measure effect is achieved by coupling the wedge-shaped tree array into the model, and the tree vibration reduction measure effect is achieved by adjusting parameters of the wedge-shaped tree array. The wedge-shaped tree array with the expected vibration reduction effect is obtained, and then design parameters of wedge-shaped tree array vibration reduction measures are obtained. The wedge-shaped tree array is arranged between a track structure and a target vibration control area, and the selection and arrangement mode of tree characteristics such as tree species, tree height and tree diameter can be optimally designed according to a target vibration reduction frequency band and an expected vibration reduction effect. The invention overcomes the limitation of the traditional vibration isolation technology on cost and implementation, provides a wedge-shaped tree array vibration reduction measure which is low in cost and easy to arrange and meets the environmental protection requirement, and has good popularization and application potential.

The invention discloses a quasi-zero stiffness vibration double-control device based on metamaterials, and relates to the technical field of vibration isolation and vibration reduction control. The device comprises a vertical vibration isolation structure, a horizontal vibration isolation layer, a middle plate, an upper connecting plate and a lower connecting plate, the vertical vibration isolation structure is connected to the top face of the horizontal vibration isolation layer, and the device is characterized in that the vertical vibration isolation layer is composed of a plurality of quasi-zero-stiffness metamaterial cell elements which are horizontally and evenly distributed, and each quasi-zero-stiffness metamaterial cell element comprises a buckle mechanism and a wave-shaped beam mechanism; the negative stiffness generated in the movement process of the buckle mechanism and the positive stiffness generated in the loading process of the wave-shaped beam mechanism counteract each other, and a quasi-zero stiffness mechanism is formed. According to the quasi-zero-stiffness metamaterial cell element, the initial stiffness of the quasi-zero-stiffness metamaterial cell element can be changed by adjusting the pre-tightening force of the bolts, so that the vertical bearing capacity is changed, different engineering requirements are met, the problem that low-frequency vibration isolation of a traditional vibration isolation device fails is solved, and the quasi-zero-stiffness metamaterial cell element is particularly suitable for meeting the earthquake and vibration dual-protection requirements of rail transit upper cover buildings.

The invention relates to the technical field of softened water treatment devices, in particular to an induced crystallization granulation fluidized bed softened water treatment device. Comprising a cylinder, a stainless steel cathode layer is arranged on the inner side of the cylinder, the stainless steel cathode layer is electrically connected with a negative electrode of a power supply, an excitation system is mounted on the cylinder, a vertical vibration frame capable of vertically reciprocating is connected to the excitation system, a translation frame is slidably connected to the vertical vibration frame, and a synchronizing system for driving the vertical vibration frame and the translation frame to synchronously displace is arranged on the vertical vibration frame. The synchronous system is in transmission connection with a transmission shaft capable of alternately rotating forwards and backwards, a micro-filtration cylinder is rotationally mounted on the translation frame, an insulating shaft is rotationally mounted in the micro-filtration cylinder, the micro-filtration cylinder and the insulating shaft are driven by the transmission shaft, a plurality of guide rings are mounted on the micro-filtration cylinder, and an anode bar slides on the insulating shaft. According to the device, grain fluidization is strengthened through synchronous multi-dimensional excitation, the problem of local reaction dead angles is solved, the problems that a traditional device is low in crystallization efficiency and uneven in particle size are effectively solved, and the stability of grain settling separation is guaranteed.

The invention belongs to the technical field of vibration isolation, and particularly discloses a multi-dimensional vibration isolation support and an installation method thereof.The vibration isolation support comprises a first connecting plate and a second connecting plate, the first connecting plate is oppositely located above the second connecting plate at intervals, and an energy consumption device used for consuming horizontal vibration energy and / or vertical vibration energy is arranged between the first connecting plate and the second connecting plate; the quasi-zero stiffness vibration isolation systems are located on the two sides or the periphery of the magneto-rheological damper, the piston and the annular permanent magnet are located on the upper portion of the magneto-rheological damper, and the fixing pieces are distributed on the two sides or the periphery of the piston. The fixing pieces are connected with movable baffles of the quasi-zero stiffness vibration isolation systems through transmission pieces. The vibration isolation support provided by the invention can consume vibration energy in multiple dimensions in the horizontal direction and / or the vertical direction, and has a self-resetting function, so that the vibration resistance, stability, safety and comfort of a building can be improved, and the vibration isolation support is relatively simple and convenient to mount and convenient to popularize.

The invention provides a ballastless track joint performance degradation monitoring method and system, and relates to the technical field of track joint performance monitoring, and the method comprises the steps: knocking a ballastless track plate at a track joint through a force hammer to generate excitation, collecting a vertical vibration acceleration response signal through an acceleration sensor, and synchronously recording the knocking time and static parameters. The vertical vibration acceleration response signal is preprocessed, abnormal pulses and baseline drift are removed, a vibration event sample is formed, and joint mechanics characteristic parameters including a vibration frequency parameter reflecting rigidity degradation and a vibration attenuation parameter reflecting damping are extracted. According to the method, the joint performance evaluation index is calculated in combination with the static parameters, the degradation grade is evaluated after the evaluation index is compared with the preset threshold value, an early warning signal is triggered, the joint degradation grade and position information are provided, and monitoring and evaluation of the joint performance are achieved.

The invention relates to motor rotor performance detection equipment which comprises a base, a vertical plate fixedly connected to the top wall of the base, a supporting shaft fixedly connected to the front wall of the vertical plate, a reciprocating bearing arranged on the supporting shaft in a sleeving mode, a reciprocating roller supported by the reciprocating bearing, a T-shaped ring fixedly connected to the front end of the reciprocating roller, a vertical plate extending downwards and two transverse plates extending in the opposite directions arranged on the T-shaped ring, the front wall of the vertical plate is connected with a vertical sliding seat in a sliding mode, the top of the vertical sliding seat is connected with a shaft bottom sensing seat in a sliding mode, the shaft bottom sensing seat is provided with two shaft bottom contact wheels, and the transverse plates on the two sides are each connected with a transverse sliding seat in a sliding mode. According to the detection method of the motor rotor performance detection equipment, the vibration characteristics of the rotor can be analyzed more fully and comprehensively, the dynamic balance correction precision is improved, and the risk of missed judgment caused by missed detection of the vibration characteristics in the vertical direction is avoided.

The invention relates to a damping spring device suitable for industry or life, in particular to a magnetic damping spring. The magnetic damping spring comprises a supporting cylinder, a force guiding piston, a force guiding piston blocking piece, a supporting rod and two or more magnets. The force guiding piston blocking piece is arranged on the upper portion of the supporting cylinder. The supporting cylinder is of a cylindrical structure, one end of the supporting cylinder is sealed and is a bottom surface, and the other end is of an opening structure for the supporting rod to penetrate; the lower end of the supporting rod penetrates through the force guiding piston blocking piece to be connected with the force guiding piston, and the upper end extends out of an opening in the upper end of the supporting cylinder. A groove is formed in the inner bottom surface of the supporting cylinder, and a magnet A is placed in the groove; a groove for placing the magnet B is formed in the lower bottom surface of the force guiding piston; the supporting rod can conduct resultant force of vertical vibration generated by axial vibration, horizontal vibration and vertical vibration to the force guiding piston, the force guiding piston drives the magnet B to extrude downwards to generate repulsive force which is gradually increased with the distance space of the magnet A, the repulsive force is used for buffering vertical vibration force conducted by the force guiding piston, and therefore the damping effect is achieved.

The invention relates to the technical field of electric bicycle detection, in particular to an electric bicycle frame strength detection device and method.The electric bicycle frame strength detection device comprises a base, the upper end of the base is provided with two vibration units symmetrically arranged front and back, and the upper end of the base is further provided with a testing unit used for clamping a frame and vibrating the frame up and down in cooperation with the vibration units; the positions, corresponding to the vibration units, of the base are each provided with two adjusting units which are arranged in a bilateral symmetry mode. According to the invention, the two hinged vibration plates and the test unit cooperate to carry out vibration test on the strength of the frame, and the vibration plates and the test unit cooperate to drive the vertical vibration amplitude of the frame to be adjusted according to the included angle between the two hinged vibration plates. Therefore, the frame strength of the electric vehicle when the electric vehicle runs on the road surfaces with different road conditions can be tested, the frame testing efficiency is improved, meanwhile, the frame strength of the electric vehicle when the electric vehicle runs on the continuously changing road surfaces can be tested, and the frame strength testing accuracy is improved.

The invention provides a prediction method for critical vibration speed of a six-high cold rolling mill based on a three-dimensional model. The critical vibration speed is predicted based on a three-dimensional six-high cold rolling mill model, under the consideration that the rolls shall be considered as short and thick beams and influence of shear deformation needs to be considered, Timoshenko beams are selected, and besides, Hermite interpolation is used for node displacement vectors; a vertical vibration dynamic equation of the mill-strip system can be established by stress analysis among the strip, rolls and mill housing; solving is performed by the Newmark-Beta method, a displacement response curve of the rolls at a specific speed can be obtained, and if the amplitude of displacement response curve is constant, the speed is the critical vibration speed of the six-high rolling mill.

The invention discloses a building cement floor construction leveling device, and relates to the technical field of cement floor construction, the building cement floor construction leveling device comprises a scraping plate, a vibration support is installed in the middle of the scraping plate, a vibration motor is installed on the vibration support, and an operation frame used for moving the leveling device is further installed on the vibration support; the lifting mechanism is installed on the rear side of the scraping plate, the lifting mechanism comprises a fixed plate and a lifting plate, and the lifting plate can do lifting motion relative to the fixed plate; the plurality of movable mounting mechanisms are mounted on the lifting plate and are used for movably mounting the vertical vibration mechanism; through cooperative arrangement of the lifting mechanism, the movable mounting mechanism and the vertical vibration mechanism, internal vibration treatment of thick cement pavement slurry can be achieved, exhaust of gas in the cement slurry is promoted, and the construction quality of leveling of the thick cement pavement can be improved in combination with scraper vibration leveling.

The invention relates to the technical field of vibration machinery, and provides a two-dimensional positive chord and vertical vibration excitation device and a vibration platform, the two-dimensional positive chord and vertical vibration excitation device comprises a base and a motor, two main shafts are rotatably arranged on the base in parallel, a motor shaft of the motor is parallel to the main shafts, eccentric blocks are arranged at the two ends of each main shaft respectively, and the eccentric blocks are arranged on the base. Gears are arranged in the middle of the main shaft, and the two gears are meshed with each other; wherein the two ends of one main shaft are in transmission connection with motor shafts at the two ends of the motor, and the rotating directions of the two main shafts are opposite; the motor and the main shaft are arranged in a split mode, so that the motor does not need to bear alternating centrifugal force and bending moment brought by an eccentric block when the main shaft rotates, and the service life of the motor is effectively prolonged. The two spindles are symmetrically arranged in parallel, and the layout mode of the eccentric blocks is changed, so that the vibration efficiency of the device is improved, vertical vibration excitation and shimmy excitation are realized, and the requirements of diversified selections of vibration directions and vibration modes can be met.

The invention discloses a TLD damping platform for take-off and landing of a large unmanned aerial vehicle. The TLD damping platform comprises a take-off and landing platform, a water tank, a lower supporting device, a connecting device and an upper supporting device. The lifting platform is located at the top end of the water tank. The lower supporting device is located below the water tank, and an upper supporting device is arranged between the bottom end of the water tank and the lower supporting device; the side face of the water tank is connected with the lower supporting device through an obliquely-arranged connecting device. The connecting device and the upper supporting device are arranged between the water tank and the lower supporting device, so that vertical impact force generated by taking off and landing of the unmanned aerial vehicle can be effectively absorbed and dispersed, and vertical vibration of the take-off and landing platform is weakened; when the water tank deviates in the horizontal direction, horizontal vibration energy can be further dissipated through the obliquely-arranged self-resetting compression rod, and resetting of the water tank and the lifting platform is promoted.

The invention provides a feeding and discharging device and an annealing furnace comprising the same. The feeding and discharging device comprises a rack, a guide rail and a skip car, the rack and the guide rail are both embedded underground, installation space is saved, and maintenance is convenient. The skip car is driven to operate in a gear and rack meshing mode, the slipping risk is avoided, the transmission efficiency is high, and synchronism is good. The guide wheels are arranged on the two sides of the skip car and can abut against the top walls of the concave parts of the guide rails in a rolling mode, transverse deviation and vertical vibration of the skip car can be effectively prevented, and the precision and stability of the moving track are guaranteed. The guide wheel can be adjusted through an adjustable mechanism to adapt to guide rails of different specifications, the structure is simple, operation is convenient, and the adjusting precision is high. The device is stable in operation, excellent in vibration resistance, long in service life and suitable for material conveying equipment such as an annealing furnace.

The utility model discloses a horizontal vibration isolation and vertical vibration isolation decoupling vibration and vibration double-control support which comprises a vertical vibration isolator and a horizontal vibration isolation device, the vertical vibration isolator and the horizontal vibration isolation device are connected in series up and down, and the vertical vibration isolator is located on one side of the horizontal vibration isolation device. Only the vibration isolation spring is arranged between the upper cover plate and the lower cover plate in the vertical vibration isolator, and a horizontal limiting device does not exist between the upper cover plate and the lower cover plate, so that the vertical vibration isolator has a multidirectional movement trend; the horizontal rigidity of the vibration and shock double-control support is smaller than that of a friction pendulum shock insulation support, the vibration and shock double-control support has the function of energy consumption in the horizontal direction, and when the vibration and shock double-control support is applied to a subway upper cover building or corridor shock insulation structure, abrasion of the support under temperature deformation of a building or a corridor can be effectively reduced; when the device is applied to the corridor, vibration of the corridor under wind-induced or human-induced loads can be effectively reduced.

The utility model discloses a lycium barbarum picking device, which relates to the technical field of lycium barbarum picking and comprises a driving device and a vibrating rod. The driving device is configured to drive the vibrating rod to reciprocate along a first straight line, at least the surface material of the vibrating rod is a flexible material, and the first straight line extends in the horizontal direction in a picking state. Picking is conducted in a horizontal left-right vibration mode, compared with vertical vibration and rotary vibration, the horizontal vibration mode can reduce damage to branches and leaves in the picking process, and therefore plant growth is protected; and the vibration rod with the surface material being a flexible material is adopted, so that damage to branches, leaves and fruits in the picking process can be further reduced.

The invention discloses an integral swinging self-resetting system with an asymmetric structure and a construction method thereof. The integral swinging self-resetting system comprises an upper structure, a lower structure and a swinging layer arranged between the upper structure and the lower structure, the plane structure of the upper structure is a non-axisymmetric structure; the swinging layer comprises a plurality of vertical elastic supports, and the plurality of vertical elastic supports are arranged at the bottom of the upper structure at intervals; the vertical elastic support comprises an upper connecting steel plate, a lower connecting steel plate, a spring and an energy consumption limiting piece; the upper connecting steel plate is arranged right above the lower connecting steel plate, the upper connecting steel plate is connected with a bottom steel sleeve arranged at the bottom of an upper structure, and the lower connecting steel plate is connected with a lower structure; the upper and lower ends of the spring are respectively welded on the upper and lower connecting steel plates; the energy consumption limiting piece comprises an upper thick-wall sleeve, a lower thick-wall sleeve and a limiting sleeve. The vibration isolation device solves the technical problems that a traditional vibration isolation device is often difficult to achieve the horizontal vibration isolation effect and the vertical vibration isolation effect at the same time, and the isolation effect of the traditional vibration isolation device is not ideal for high-frequency vibration caused by metros and the like.

The present invention provides a three-degree-of-freedom quasi-zero stiffness vibration isolator, including a table, a base, a baffle and a vertical vibration isolator, the baffles are vertically welded around the top of the base, the middle of the bottom of the table is vertically connected to the vertical vibration isolator, and the middle of the sides of the table and the baffle are respectively vertically connected with horizontal vibration isolators. The present invention can achieve quasi-zero stiffness in the three degrees of freedom in the vertical and horizontal directions, the system vibration isolation band is wide, and vibration control of 0.1Hz~300Hz can be achieved, and the system has large static stiffness and large bearing capacity, which can meet the load-bearing requirements of 10,000kg precision instruments, and has high positioning accuracy, and has the ability to adjust bearing capacity and stiffness, and can be adapted to precision instruments of different models, with a wide range of applications and strong versatility.

The invention discloses an anti-seismic protection structure of a coral island reef limestone underground chamber and a construction method.The anti-seismic protection structure of the coral island reef limestone underground chamber comprises a chamber hole, an elastic shock insulation layer, a pouring layer, a shock insulation support, a viscous damping component and a mild steel damper; the seismic isolation support and the pouring layer bear vertical loads together, the viscous damping component and the side wall bear lateral confining pressure of reef limestone, under the earthquake effect, the elastic seismic isolation layer can preliminarily absorb earthquake energy, and after three-direction seismic waves are transmitted to the structure, the seismic energy of X-direction seismic waves and Y-direction seismic waves is consumed by the seismic isolation support at the bottom layer through vibration and friction, so that the seismic isolation effect is achieved. X-direction and Y-direction deformation and displacement of the chamber are reduced, Z-direction seismic waves absorb seismic energy through the seismic isolation support, so that energy continuously transmitted to the upper portion is avoided or reduced, and the vertical vibration response of the structure is relieved. At the arch crown part, the mild steel damper can absorb and dissipate energy through vibration and plastic deformation of an energy dissipation component arranged on the mild steel damper.

The utility model discloses an annular spring composite conical rubber two-stage variable-stiffness vibration double-control support which comprises a horizontal vibration isolation support body, a longitudinal vibration isolation support body and a transverse vibration isolation support body. The vertical vibration isolation support comprises a support upper connecting unit and a support lower connecting unit, the lower part of the support is connected with a unit; the double-stage variable-stiffness vertical vibration isolation unit comprises upper inner ring spring composite conical rubber, lower inner ring spring composite conical rubber and an outer ring spring, and the upper inner ring spring composite conical rubber and the lower inner ring spring composite conical rubber are partially embedded into the outer ring spring from the upper portion and the lower portion respectively. When the two-stage variable-stiffness vertical vibration isolation unit is subjected to first-stage vertical loading, the vibration isolation unit has first-stage vertical stiffness, when the two-stage variable-stiffness vertical vibration isolation unit is subjected to second-stage vertical loading, the vibration isolation unit has second-stage vertical stiffness, and the first-stage vertical stiffness is smaller than the second-stage vertical stiffness. According to the double-order variable-stiffness vertical vibration isolation device, the vertical vibration effect and the horizontal earthquake effect can be isolated at the same time, meanwhile, double-order variable-stiffness vertical vibration control is achieved by means of the combined vibration isolation units of the annular springs and the conical rubber, and the vibration isolation effect is remarkably improved.

The utility model discloses a conical laminated rubber composite belleville spring vibration double-control support which comprises a horizontal shock insulation support, a vertical shock insulation support and a conical laminated rubber composite belleville spring. The vertical vibration isolation support comprises a support upper cover plate and a support lower cover plate, a support lower cover plate; the vertical vibration isolation units are arranged on the support lower cover plate in a preset plane layout mode, each vertical vibration isolation unit is composed of a belleville spring and conical laminated rubber, the belleville springs and the conical laminated rubber are arranged in a series connection mode, and the conical laminated rubber is provided with a center through hole; the prestressed tendons are in one-to-one correspondence with the vertical vibration isolation units, the upper ends of the prestressed tendons are anchored and fixed on the support upper cover plate and penetrate through central through holes of the belleville springs and the conical laminated rubber, and the lower ends of the prestressed tendons are anchored and fixed on the support lower cover plate. According to the utility model, the requirement of simultaneously isolating horizontal earthquake and vertical vibration can be met, the vertical and horizontal deformation decoupling of the whole support can be realized, and the support can be particularly used for high-rise buildings in the areas.

According to the multi-connecting-rod type automobile suspension device, through cooperative cooperation of a multi-connecting-rod assembly, a damping support, an axle and a damping assembly, wheel vertical vibration caused by the road surface can be efficiently converted into a multi-connecting-rod swing vector, and self-adaptive damping adjustment is achieved by means of a damper and air cylinder composite structure in the damping assembly; impact can be effectively buffered in the compression stroke, springback can be restrained in the stretching stroke, it is ensured that tires continuously grip the ground, meanwhile, sound insulation materials are additionally arranged at the ends of the dampers, running noise is effectively reduced, impact energy in the vertical direction is further absorbed by integrating multiple sets of spiral springs through a drive axle, rigid transmission to an automobile main frame is reduced, and the service life of the automobile is prolonged. The whole structure is high in rigidity and reasonable in spatial arrangement, and has good vibration absorption performance, reliability and comfort, and the driving smoothness, the control stability and the noise vibration comfort of a vehicle are remarkably improved.

The invention relates to the technical field of elevator fault diagnosis, in particular to an elevator fault diagnosis and positioning method based on big data, which comprises the following steps: acquiring speed and load data of an elevator and vibration acceleration in vertical and horizontal directions; each elevator operation stage is divided into a starting stage, a constant speed stage and a braking stage, and amplitude change coefficients and amplitude frequency coefficients of the starting stage and the braking stage during each elevator operation are obtained, so that vibration abnormal coefficients of the starting stage and the braking stage during each elevator operation are obtained; the method comprises the following steps: calculating a vibration consistency coefficient influenced by unbalance of a traction sheave of the elevator when the elevator runs each time so as to obtain a vertical vibration abnormal value when the elevator runs each time, calculating an inherent frequency approximation coefficient of vibration acceleration in the horizontal direction when the elevator runs each time so as to obtain an elevator fault significant value in each monitoring time period, and diagnosing an elevator fault condition. And fault positioning is carried out in combination with the classification model. The accuracy of elevator fault diagnosis and positioning can be improved.

The invention discloses a path selection method and system for AGV transportation equipment, a product and a medium. The method comprises the following steps: firstly, when the automated guided vehicle runs, calculating and updating vibration and slippage cost values for each unit of a grid map in real time by collecting vertical vibration and wheel-actual speed difference data, so as to construct a dynamic physical risk map; after a transportation task is received, obtaining exclusive vibration and slippage weights according to task characteristics (such as whether goods are fragile or not); evaluating a plurality of to-be-selected paths, and accumulating the length cost of each path and the weighted vibration cost and the weighted slip cost of all grids along the path to calculate the comprehensive passing cost; and selecting the path with the lowest comprehensive passing cost as a final execution path. By implementing the technical scheme provided by the invention, the adaptability of AGV path planning to complex physical road conditions is improved.

The invention relates to the technical field of transformer vibration testing, and discloses a transformer vibration testing device and method.The transformer vibration testing device comprises a transverse vibration mechanism, a vertical vibration mechanism and a rack mechanism, according to an occasion needing simulation, an inclined rack is controlled to obliquely swing around a first horizontal axis to a set inclination angle relative to a rotary rack, and the inclined rack is driven to rotate; meanwhile, the tool rack is controlled to obliquely swing around a second horizontal axis to a set inclination angle relative to the inclined rack, so that the transformer is controlled to obliquely swing around a first horizontal axis and the second horizontal axis, coupling inclined swing control is achieved, and the transformer can swing to a set inclination posture in any direction in a three-dimensional space; the rotating rack is driven by the rotating driving structure to rotate relative to the vertical vibration table so as to drive the transformer to rotate, excitation vibration on the periphery of the transformer can be achieved in a rotating mode under driving of the transverse vibrator, and the testing cost can be reduced.

The invention provides a vertical liquid damper which comprises a closed container, buffer liquid, a horizontal partition part and a horizontal energy dissipation part, a base connected with an external structure to be subjected to vibration reduction is arranged at the bottom of the closed container, and the interior of the closed container is divided into at least two independent closed cavities by the horizontal partition part; each closed cavity is filled with the buffer liquid flowing in a collision mode, the horizontal energy dissipation pieces are arranged in the closed cavities, each horizontal energy dissipation piece comprises a middle hollow channel and a peripheral baffle, and the peripheral baffle is provided with a pore structure for the buffer liquid to pass through in the vertical movement process. The device has the advantages of effective dissipation of vertical vibration energy, simple structure and the like.