684results about How to "Reduce vibration amplitude" patented technology

The invention discloses an intelligent logistics path optimization system based on big data, and relates to the technical field of logistics, the system comprises a data acquisition module, a data analysis module, a path planning module, a feedback adjustment module and a user interface module; according to the method, the driving style and behavior characteristics of each driver can be deeply analyzed by comprehensively collecting the historical driving data of the driver, such as the driving speed, the braking frequency and the turning habit, and by means of the detailed driver driving habit analysis, the path planning better fits the personal preference of the driver, for example, for the driver with aggressive driving style, the driving habit of the driver can be better optimized. The system intelligently recommends routes with excellent road conditions and less traffic restrictions, so that not only can a driver give full play to the driving speed advantage, but also the driving experience that the driver pursues speed and passion can be met to a certain extent, and for drivers with careful driving styles, the system tends to recommend routes with small traffic flow and high road safety.

The invention discloses a communication network power distribution cabinet convenient for heat dissipation, and relates to the technical field of power distribution cabinets, and the power distribution cabinet comprises a composite mechanism. According to the communication network power distribution cabinet convenient to dissipate heat, through the design of a composite mechanism, the box body shell is used for storing electronic components, after long-time operation, the temperature in the box body shell rises, hot gas rises, and then the hot gas flows to the processing mechanism from the circular groove, so that the heat dissipation effect is achieved, and the internal temperature of equipment is reduced; the ventilation mechanisms are arranged on the two sides of the box body shell, so that the convection effect is achieved, the cold air flowing effect is improved, the cold air is located at the low position with the high density, hot air is squeezed upwards after entering the box body shell, the discharging speed is increased, and the heat dissipation efficiency is improved. The box body shell is supported through the supporting assembly, so that the effect of reducing deformation of the box body is achieved, and internal electronic elements are protected.

The invention relates to the technical field of electric control cabinets, and discloses an electric control cabinet and a using method and application thereof in crane construction, the electric control cabinet comprises a shell assembly, the shell assembly comprises a cabinet body and a mounting assembly arranged in the cabinet body, one side of the mounting assembly is provided with a heat dissipation adjusting assembly, and the heat dissipation adjusting assembly is arranged on the other side of the cabinet body. The installation assembly comprises a fixing frame, the fixing frame is connected with the inner wall of the cabinet body, damping springs are arranged at the four corners of the surface of the fixing frame, and an installation frame is arranged at the end, away from the damping springs, of the fixing frame. Through cooperation of the mounting assembly and the heat dissipation adjusting assembly, the interval between every two adjacent heat dissipation fins is adjusted in real time according to different temperatures of different positions, the ventilation quantity between an adjusting plate and a ventilation groove is adjusted, and therefore rapid heat dissipation is achieved, the vibration amplitude of the mounting frame is reduced when external wind power is too large, and normal operation of electrical elements is ensured.

The invention discloses a damping device, a refrigerating machine assembly and a refrigerating system, and relates to the technical field of refrigerating system structures.The damping device is used for being connected between a machine head and a Dewar of a refrigerating machine, the damping device comprises a first damping structure and a second damping structure, the first damping structure comprises a mounting structure and a first elastic piece, and the second damping structure comprises a second elastic piece; the installation structure is used for being installed on the Dewar. One end of the first elastic piece is installed on the installation structure. The second vibration reduction structure comprises a second elastic piece, the second elastic piece and the first elastic piece are oppositely arranged in the first direction in a spaced mode, and one end of the second elastic piece is used for being installed on the Dewar; wherein the other end of the first elastic piece is used for being connected with one end, in the first direction, of the machine head, and the other end of the second elastic piece is used for being connected with the other end, in the first direction, of the machine head. The invention aims to solve the problem of operation vibration when a low-temperature system is built for an existing refrigerator.

The invention relates to a fan tower drum, a vibration reduction method of the fan tower drum and a wind driven generator, the fan tower drum comprises a tower drum body and a plurality of vibration reduction assemblies arranged in the tower drum body, one ends of the multiple vibration reduction assemblies are connected with one another, the other ends of the multiple vibration reduction assemblies are circumferentially spaced and are connected to the drum wall of the tower drum body, and each vibration reduction assembly comprises a pipeline, a plurality of damping assemblies and a plurality of damping assemblies, the interior is hollow; the mass ball is movably arranged in the pipeline; and the two elastic parts are oppositely arranged, and the two elastic parts are arranged at the two ends of the pipeline correspondingly, so that when the tower drum body vibrates, the mass ball can reciprocate between the two elastic parts. When the fan tower drum vibrates, the mass ball can move in the pipeline, the mass ball can reciprocate between the two elastic parts through compression and resilience force of the elastic parts, vibration borne by the fan tower drum can be counteracted through multiple buffering motions of the elastic parts, and the stability and safety of the fan tower drum can be improved; and the structural damage and the maintenance cost caused by vibration are reduced.

An embodiment of the present specification discloses a speaker, comprising: a vibration assembly including a vibration element and a vibration housing, the vibration element converting an electrical signal into mechanical vibration, the vibration housing being in contact with a face skin of a user; and the first elastic element is elastically connected with the vibration shell.

The invention belongs to the field of agricultural machinery, and particularly relates to a large traction type agricultural implement flexible deviation adjusting device and a control system. The flexible deviation adjusting device comprises a suspension-traction bearing connecting mechanism, a multi-layer push-pull deviation adjusting mechanism, a double-point quick hooking balance mechanism and a distributed control system. The front end of the suspension-traction bearing connecting mechanism is suspended on a tractor through three points, and the rear end of the suspension-traction bearing connecting mechanism is quickly connected with a balance mechanism traction machine tool through two points of the multi-layer push-pull deviation adjusting mechanism; the multi-layer push-pull deviation adjusting mechanism is provided with a deviation correction traction oil cylinder, so that the flexible traction driving mechanism can slowly swing left and right by taking the rear end center as the circle center, the double-point quick hooking balance mechanism is adjusted, and the transverse and course deviation of the machine is further compensated; the distributed control system integrates technologies of satellite navigation, sensors and the like, a BP-PID control algorithm is adopted, a deviation adjustment control strategy is formulated, an automatic control device compensates transverse and course deviations of the seeder in real time, a seeding path is accurately adjusted, and the no-tillage seeding quality is improved.

The invention discloses an integrated landscape steel structure charging pile, and relates to the technical field of charging piles, the integrated landscape steel structure charging pile comprises a charging main body, a T-shaped frame is fixed at the bottom of the charging main body, the T-shaped frame is fixedly mounted on the ground, a cable of a charging gun is fixedly mounted on the left side of the charging main body, and a female shell is buried in the ground; a secondary shell is slidably mounted on the inner wall of the primary shell, a plurality of electric cabinets are fixedly mounted on the top surface of the secondary shell, energy storage batteries are fixedly mounted at the bottom ends of the interiors of the electric cabinets, the energy storage batteries are connected with one another through cables, and the cables at one ends of the energy storage batteries penetrate through and are fixedly mounted on the top surface of the secondary shell; according to the invention, the electric cabinet is stably lifted through the sub-shell, so that the problem that an output power supply of the charging main body is damaged due to the fact that the energy storage batteries in the electric cabinet are soaked by rainwater is avoided.

The utility model provides a silking pipe for a silking machine of a high-speed hot-rolled wire rod production line. The connecting pipes are connected to the two ends of the arc-shaped pipe, the connecting pieces are arranged between the arc-shaped pipe and the connecting pipes, each connecting piece comprises at least two reinforcing ribs and a connecting bolt pair connecting every two adjacent reinforcing ribs, one ends of the reinforcing ribs are in lap joint with the arc-shaped pipe, the other ends of the reinforcing ribs are in lap joint with the connecting pipes, and the reinforcing ribs are arranged in the circumferential direction of the connecting pipes. The spinning pipe can be replaced conveniently, vibration of the spinning pipe is reduced, and the service life of the spinning pipe is prolonged.

The invention discloses a flexible support for mountainous region photovoltaic construction, and relates to the technical field of photovoltaic construction, the flexible support comprises a plurality of groups of fixing piles poured on a mountainous region, steel nooses are arranged among the plurality of groups of fixing piles, photovoltaic fixing plates are laid on the steel nooses, and bearing cables are further arranged among the plurality of groups of fixing piles. A square pyramid is arranged on the lower surface of the photovoltaic fixing plate, the bottom end of the square pyramid is arranged on the bearing cable, a windproof cable is longitudinally arranged below the bearing cable and penetrates through the square pyramid, windproof piles poured on a mountain land are arranged at the two ends of the windproof cable, and damping mechanisms are arranged in the windproof piles. The bracket is provided with the windproof cable and the damping mechanism, and the energy of up-down vibration of the windproof cable is absorbed through mechanical movement in strong wind weather, so that the amplitude of up-down vibration of the steel noose and the bearing cable can be reduced, the stability of the steel noose and the bearing cable is improved, and the wind-resistant effect is good.

The invention provides a swing type tuned mass damper which comprises a mass unit, a swing arm unit and an energy consumption unit, the mass unit comprises an upper mass block and a lower mass block, the upper mass block is in swing connection with a controlled structure through the swing arm unit, and the lower mass block is in swing connection with the controlled structure through the energy consumption unit. The lower mass block can be horizontally and movably supported on the controlled structure through a horizontal guide assembly; the energy dissipation unit comprises a linear damping assembly and a nonlinear damping assembly, the linear damping assembly is arranged at the bottom of the lower mass block, the nonlinear damping assembly comprises linear dampers symmetrically arranged on the two sides of the mass unit, and the upper mass block and the lower mass block are connected through the linear dampers. The vibration damper has the advantages that the occupied space is reduced under the condition of the same mass unit vibration frequency and effective mass, and the vibration damping effect is good.

The invention relates to the technical field of crushing devices, in particular to a hydraulic breaking hammer which comprises a supporting assembly, a support body, a bearing shell arranged on the inner side of the support body, a breaking hammer body arranged on the inner side of the bearing shell, and a buffering assembly. Comprising a first connecting plate arranged on the outer side of the breaking hammer and a second connecting plate arranged on the outer side of the breaking hammer, the supporting assembly further comprises a pin shaft sleeve arranged in the support body, and the buffering assembly further comprises first rotating shafts arranged on the two sides of the first connecting plate. When rock is crushed through a hydraulic hammer and the hardness of the rock is high, the hydraulic hammer needs to repeatedly work on the rock, at the moment, the hydraulic hammer can violently vibrate, and in the process that the rock is knocked by the crushing hammer to cause vibration, under the action of the elastic force of a buffer assembly on the outer side of the crushing hammer, the rock is crushed; and the vibration amplitude of the breaking hammer can be reduced by the buffer assembly, so that the overall vibration amplitude is reduced.

The invention relates to the technical field of wind power generation, and discloses a method for reducing damage to a yaw mechanism of a wind power generation system through pneumatic unbalance adjustment, and the method comprises the following steps: S1, arranging sensors to monitor blades, a wind field and a vibration state; s2, fusing data, and calculating pneumatic unbalance; s3, constructing a model to predict the change of the wind field; s4, adjusting the balance load of the blade load; s5, optimizing a yaw angle adjustment strategy; s6, yaw action is reduced, and operation is optimized; and S7, health state prediction faults are monitored. The pneumatic load and the pneumatic unbalance degree of the blade are monitored in real time, the micro pneumatic actuator and the dynamic balance weight module are combined, the pneumatic performance and the load distribution of the blade are dynamically adjusted, the impact load and the vibration amplitude borne by the yaw mechanism are effectively reduced, in addition, a torque limiting and intelligent damping protection mechanism is adopted, and the service life of the yaw mechanism is prolonged. The fatigue damage accumulated value and the part abrasion degree of the yaw mechanism are fundamentally reduced, and therefore the service life of the yaw mechanism is prolonged.

The invention discloses a damping device for axial vibration control of a steam-water pipeline of a thermal power plant, the damping device comprises two outer connecting assemblies and two inner fixing assemblies, the two inner fixing assemblies are respectively located in the corresponding outer connecting assemblies, and the inner walls of the two outer connecting assemblies are fixedly connected with a plurality of radial damping assemblies; the invention relates to the technical field of pipeline vibration control. According to the damping device for controlling the axial vibration of the steam-water pipeline of the thermal power plant, the damping device and the steam-water pipeline can be conveniently and fixedly installed through the arranged outer connecting assembly and the inner fixing assembly, and meanwhile the damping effect on the steam-water pipeline can be improved through the arranged axial damping assemblies distributed in a surrounding mode; and meanwhile, through cooperative use of a third spring, a movable buffering damping block, a fourth spring and a fixed vibration reduction damping sleeve in the axial vibration reduction assembly, axial vibration borne by the steam-water pipeline can be buffered and reduced, the shaking amplitude of the steam-water pipeline is reduced, and therefore the working stability of the whole pipeline can be improved.

The invention discloses a suspended ballast floating type offshore wind power foundation suitable for water depth and a using method, and belongs to the technical field of floating type offshore wind power generation. The wind power foundation comprises a three-stand-column semi-submersible foundation, a mooring system and a control system, and the three-stand-column semi-submersible foundation comprises three vertical stand columns, a supporting rod and a ballast caisson; the ballast caisson is connected with a sliding rail arranged on the side wall of the vertical stand column through a sliding rope, so that the ballast caisson moves up and down relative to the vertical stand column, the position of the ballast caisson is adjusted through a control system, and then the gravity center position and the draft depth of the foundation are adjusted so as to adapt to different environmental conditions, and the stability and the anti-overturning capacity are ensured. The use method comprises the steps of monitoring environmental conditions, calculating overturning moment, calculating anti-overturning moment, adjusting the depth of the ballast caisson and recording and analyzing data, the required moving depth of the ballast caisson is reversely deduced by calculating the overturning moment to ensure that the gravity center and the buoyancy center of the foundation are kept at proper positions, and the risk of overturning of the foundation is reduced.

The invention discloses security inspection equipment, which comprises a ray emitter, a ray receiver and a detection channel, and is characterized in that the detection channel comprises a radiation section, and the ray emitter and the ray receiver are respectively located at two opposite sides of the radiation section; the channel wall defining the radiation section comprises a first wear-resistant layer, a supporting interlayer and a second wear-resistant layer which are arranged in a stacked mode, and detection rays emitted by the ray emitter sequentially penetrate through the first wear-resistant layer, the supporting interlayer and the second wear-resistant layer to enter the radiation section so as to scan an object to be detected; detection rays generated after the object to be detected is scanned sequentially penetrate through the second wear-resistant layer, the supporting interlayer and the first wear-resistant layer and then are received by the ray receiver, and the transmission capacity of the first wear-resistant layer and the second wear-resistant layer to the detection rays is smaller than the transmission capacity of the supporting interlayer to the detection rays. According to the scheme, the problem of poor imaging effect of security inspection equipment in related technologies can be solved.

The utility model relates to the technical field of pipelines, and discloses a protection device for a pressure pipeline, which comprises an outer protection ring, a buffer ring and a pipeline main body, two sides of the inner wall of the buffer ring and positions close to the upper and lower parts are respectively provided with two mounting grooves, and damping rods are fixedly arranged in the plurality of mounting grooves. And the lower ends of the multiple damping rods are fixedly connected with connecting bases, the lower ends of the multiple connecting bases are fixedly connected with clamping rings, the outer walls of the multiple damping rods are movably sleeved with damping springs, and a plurality of moving grooves are formed in the positions, close to the front portion and the rear portion, of the outer wall of the buffering ring. According to the damping pipeline, the damping structure is arranged so that the pipeline body can be better damped and protected, the problem that the pipeline body is damaged due to the fact that the pipeline body collides with the outside is effectively solved, meanwhile, the pipeline can be better protected through the internal structure of the pipeline body, and the damping pipeline has better usability.

The invention provides an intelligent active suspension system of a centrifugal machine, which belongs to the technical field of centrifugal machines and comprises an air spring mechanism, an actuating mechanism arranged beside the air spring mechanism, a control mechanism arranged beside the actuating mechanism, and an air supply mechanism arranged beside the spring mechanism. An anti-toppling structure is arranged inside or outside the air spring mechanism, a sensor body is arranged inside the air spring mechanism, the air spring mechanism is composed of an air spring body, a spring upper mounting plate and a spring lower mounting plate, and the spring upper mounting plate is fixed to the top of the air spring body. The advantages can be fully exerted, the problems existing in an existing centrifugal machine vibration isolation technology are effectively solved, the overall performance and reliability of the centrifugal machine are improved, and more stable, efficient and safe technical support is provided for the centrifugal separation process in industrial production; and the use height and the vibration isolation effect of the intelligent active suspension of the centrifugal machine can be adjusted according to use requirements.

The offshore wind power platform tidal energy vibration reduction power generation device is in a circular truncated cone shape, is fixedly arranged on a sunken pile in a sleeving mode and comprises a bottom disc and a top disc, the diameter of the top disc is larger than that of the bottom disc, the two sides of the top disc are connected with a working platform on the upper portion of the sunken pile through cables, and a connecting structure is arranged between the top disc and the bottom disc. An annular locking structure is coaxially arranged at the top of the top disc and sleeves the sunken pile, horn-mouth-shaped flow guide structures are uniformly arranged on the side wall of the connecting structure, an impeller is arranged on the inner side of the connecting structure, an impeller mounting shaft is fixedly connected with a generator, and the generator is connected into a power storage device of the wind power platform. The effect of reducing the vibration amplitude of water flow impact on pile sinking is achieved, tidal energy is utilized for power generation, the height of the power generation device can be adjusted according to the rising tide condition, and the power generation efficiency is maintained.

The invention discloses a low-altitude air quality monitoring device based on an unmanned aerial vehicle and a using method thereof.The low-altitude air quality monitoring device comprises an unmanned aerial vehicle body, a mounting frame is fixedly connected to the top of the unmanned aerial vehicle body, an air quality detector body is detachably connected to an inner cavity of the mounting frame, and a mounting mechanism is arranged on the back face of the mounting frame; a fixing frame is fixedly connected to the bottom of the unmanned aerial vehicle body, and supporting legs are fixedly connected to the periphery of the bottom of the fixing frame. By arranging the thin film photovoltaic panel, solar energy can be converted into electric energy on sunny days, the electric energy is stored in a battery of the unmanned aerial vehicle body through the controller, so that the cruising ability of the unmanned aerial vehicle body is improved to a certain extent, and by arranging the damping mechanism, vibration generated by the unmanned aerial vehicle body can be buffered when the unmanned aerial vehicle body lands on the ground, and the safety of the unmanned aerial vehicle body is improved. Therefore, the influence of vibration on internal elements of the unmanned aerial vehicle body and the air quality detector body is reduced, and the service life of the unmanned aerial vehicle body and the air quality detector body is prolonged.

The utility model relates to the technical field of heating and ventilation equipment, and provides an outdoor unit and the heating and ventilation equipment. The damping device comprises a bearing part and a damping assembly, the bearing part and the chassis are arranged in a spaced mode, and the damping assembly is arranged on the chassis, connected with the bearing part and used for buffering vibration generated by the equipment parts borne by the bearing part; and the limiting assembly is arranged on the side portion of the bearing piece, connected with the bearing piece and the shell and used for limiting movement of the bearing piece. According to the technical scheme, when the outdoor unit is transported, the limiting assembly is connected with the side portion of the bearing piece and the shell so as to limit movement of the bearing piece and the equipment piece on the bearing piece, and therefore the risk that a pipeline connected with the equipment piece is broken due to too large stress can be reduced. Before the outdoor unit operates, the limiting assembly and the bearing piece are disconnected, and therefore the outdoor unit can meet the requirements for transportation and operation.

The invention relates to the technical field of household appliances, and discloses a pipeline system which comprises a refrigerant pipe, a fixing rubber block, an air pressure adjusting mechanism, a vibration sensor, a compressor frequency determining module and a controller assembly. The controller assembly is connected with the air pressure adjusting mechanism, the vibration sensor and the compressor frequency determining module and used for controlling the air pressure adjusting mechanism to adjust the air pressure of the air bag for fixing the rubber block according to the vibration frequency, detected by the vibration sensor, of the pipeline system and the compressor operation frequency obtained by the compressor frequency determining module. The air pressure of the air bag is adjusted according to the frequencies of the refrigerant pipe and the compressor, so that the vibration frequency of the pipeline system avoids the frequency of the compressor, resonance between the refrigerant pipe and the compressor is avoided, the vibration amplitude of the refrigerant pipe can be effectively reduced, noise is reduced, and the overall stability of the pipeline system is improved. The invention further discloses a control method for preventing resonance of the pipeline system.

A damping inerter with an electromagnetic damping unit comprises a supporting structure unit, a translation inertia unit, a rotation inertia unit, the electromagnetic damping unit and a transmission unit, the translation inertia unit is arranged on the supporting structure unit in a reciprocating motion mode, and the two sides of the translation inertia unit are connected with the supporting structure unit through rigidity units. The electromagnetic damping unit comprises a rotating shaft, magnetic steel, a conductive alloy plate and a magnetism isolating steel plate, the magnetism isolating steel plate is arranged on the rotating shaft, the magnetic steel is arranged on the magnetism isolating steel plate, the transmission unit drives the rotating shaft to rotate, so that the magnetic steel and the conductive alloy plate move relatively, and the rotation inertia unit is connected with the rotating shaft. The internal narrow space of the wind generating set and the arrangement mode of a traditional damper are taken into consideration, the mass adjustable range of the damper is widened through the internal rotation inertia element, larger inertia force and shorter movement stroke are obtained on the basis that the overall mass is not changed, and the overall stability is improved.

According to the fabricated steel frame structure system, the inserted high-strength concrete grouting columns and the easily-assembled cold-formed thin-walled steel combined anti-seismic beams are adopted, and prefabrication and assembly are facilitated. The earthquake response is reduced through the replaceable safety piece set, the disc spring damper and the self-resetting hydraulic supporting rod set, and rapid function recovery is achieved. According to the system, a floor and a floor beam are poured into integral rigid connection, and a PVC joint pulling plate is adopted for connecting a filler wall. High-strength concrete grouting enhances column connection and bearing capacity, and cold-formed thin-walled steel members improve production efficiency and reduce cost. The disc spring damper reduces vibration of the double-beam structure and improves energy dissipation capacity. The replaceable safety piece and the web plate are connected to protect the main body structure, and the self-resetting hydraulic supporting rod enhances the structural stability. The beam end inserting plates and the inserting grooves are rapidly assembled, and the anti-seismic performance of the joint is improved. The PVC joint pulling plate prevents the wall body from being pressed and cracked, and the material consumption of the cast-in-place hollow concrete wall is reduced. The floor and the floor beam are integrally poured to increase the structural rigidity and improve the lateral force resistance and the anti-seismic performance.

The invention provides a device and method for eliminating vibration of a drive chain of an escalator, the device is used for being arranged on the escalator, the escalator comprises a drive main machine, a drive main shaft and the drive chain wound on the drive main machine and the drive main shaft, and the device comprises a vibration sensor arranged on the escalator, the vibration sensor is used for collecting vibration data during operation of the escalator; the frequency converter is electrically connected with the driving host and used for controlling the rotating speed of the driving host; the tensioning module is arranged on one side of the driving chain and used for tensioning the driving chain; the pressure sensor is arranged on the tensioning module and used for measuring the pressure between the tensioning module and the driving chain; the moving module is connected with the driving host and used for moving the driving host; and the controller is electrically connected with the vibration sensor, the frequency converter, the tensioning module, the pressure sensor and the moving module. Vibration of the driving chain can be automatically eliminated, so that vibration of the escalator is eliminated, the escalator does not need to be stopped for maintenance, and the maintenance cost is reduced.

The forming device comprises a first rotating disc, lower punching die heads capable of sliding up and down are arranged on the first rotating disc in a circumferential array mode, a convex disc with a lower opening is arranged below the first rotating disc, the convex disc with the lower opening is in an unclosed notch ring shape, and a second rotating disc is arranged above the first rotating disc. Upper punching die heads capable of sliding up and down are arranged on the second rotating disc in a circumferential array mode, a top protruding disc is arranged above the second rotating disc, and the upper ends of the upper punching die heads make sliding contact with the lower wall of the top protruding disc; the lower end of the lower punching die head is in sliding contact with the annular upper wall defined by the lower opening convex disc and the vibration ladder block. The vibration ladder block can drive the lower punching die head to vibrate in a reciprocating mode, so that materials in the lower punching die head are denser, bubbles in powder in the lower punching die head are promoted to be separated, and the weight difference between tablets is reduced.

The invention discloses a frequency-adjustable dynamic vibration absorber adjusted by using a stepping motor and a vibration absorption method, main vibration absorption objects of a vibration absorption mechanism are a fan shell and a fan inlet and outlet pipeline, the vibration absorber adopts a mass block as a vibration absorption vibrator of the dynamic vibration absorber, the vibrator is mounted on two cylindrical guide rails, and the cylindrical guide rails are arranged on the vibration absorption vibrator. The two ends of the vibration absorber are restrained through a spring connected with the vibration absorber main frame, the vibration absorber is provided with a spring check ring capable of moving in the axial direction of the spring to limit displacement of the middle section of the spring, the spring check ring and the vibration absorption vibrator are installed on the same guide rail, and the position of the spring check ring can be adjusted through a lead screw driven by a stepping motor. The effective length of the spring is changed, so that the characteristic frequency of the dynamic vibration absorber is changed, and the purpose of broadband vibration reduction is achieved. The vibration absorber is simple and compact in structure, easy to adjust, low in energy consumption, good in vibration reduction effect, high in structural modularization degree and good in use prospect.

The invention relates to the field of ocean engineering, and discloses a multi-layer pore plate structure for shock absorption of an ultra-large floating body, the structure is composed of a plurality of pore plates which are horizontally arranged, and the pore plates are rigidly connected with the floating body through fixing devices and are made of high-strength light materials; open pores are uniformly distributed in the surface of each pore plate, and the porosity, the plate spacing, the water entry depth and the plate layer number of the pore plates can be flexibly adjusted according to the working environment and the wave condition of the floating body; the porosity range is 6%-15%, the distance between the plates is 4.2%-16.7% of the working water depth of the floating body, and the water entering depth is 1-3 times of the height of the wave below the bottom surface of the floating body; through reasonable design and arrangement, the multiple layers of porous plates can effectively reduce transmission and reflection of wave energy, the energy dissipation capacity is enhanced, and vibration reduction of the head wave side and dynamic stability of the back wave side are achieved; the damping device has the characteristics of flexible structural design, remarkable damping effect and wide application range, and is suitable for offshore and deep sea ultra-large floating body engineering.

The invention relates to the technical field of household appliances, and discloses a pipeline system which comprises a refrigerant pipe, a fixed rubber block, a rubber block adjusting mechanism, a vibration sensor, a compressor frequency determining module and a controller assembly. The controller assembly is connected with the rubber block adjusting mechanism, the vibration sensor and the compressor frequency determining module and used for controlling the rubber block adjusting mechanism to adjust the hardness of the fixed rubber block according to the vibration frequency, detected by the vibration sensor, of the pipeline system and the compressor operation frequency obtained by the compressor frequency determining module. The hardness of the fixed rubber block is adjusted according to the frequency of the refrigerant pipe and the compressor, so that the vibration frequency of the pipeline system is kept away from the frequency of the compressor, resonance between the refrigerant pipe and the compressor is avoided, the vibration amplitude of the refrigerant pipe can be effectively reduced, noise is reduced, and the overall stability of the pipeline system is improved. The invention further discloses a control method for preventing resonance of the pipeline system.

The invention relates to the technical field of oil-immersed transformers, and provides a 35kV oil-immersed transformer which comprises an iron core, the iron core is provided with an upper transverse part, a lower transverse part and three vertical parts, the two ends of each vertical part are connected with the upper transverse part and the lower transverse part respectively, and the three vertical parts are sequentially arranged in the transverse direction; the iron core is arranged on the frame body; the winding assembly sleeves the iron core and is provided with a through hole, and the vertical part penetrates through the through hole; the lower supporting ring is arranged at the lower part of the frame body, the vertical part penetrates through the lower supporting ring, the lower supporting ring is arranged below the winding assembly, the lower supporting ring is provided with a lower conical supporting surface, the lower conical supporting surface is an outer conical surface and is provided with lower inclined guide grooves, the length direction of the lower inclined guide grooves is a generatrix along the lower conical supporting surface, and a plurality of lower inclined guide grooves are circumferentially arranged; the lower supporting piece is arranged in the lower inclined guide groove in a sliding mode and supports the lower end of the winding assembly. According to the technical scheme, the technical problems that the vibration quantity is increased and potential safety hazards exist after the oil-immersed transformer is used for a long time in the prior art are solved.