5470results about "Vibration suppression adjustments" patented technology

The utility model relates to the technical field of rail travelling cranes, and discloses travelling crane rail cleaning equipment which comprises a rail body and a support arranged on a travelling crane, a scraper bucket used for cleaning the rail body is arranged on the support, the scraper bucket is in contact with the rail body, and the travelling crane rail cleaning equipment further comprises a shell arranged on the scraper bucket and used for cleaning the rail body. A mounting area is arranged on the surface of one side close to the track body; the rack is arranged in the mounting area on the shell; the rotary driving assemblies are arranged on the rack, and the two rotary driving assemblies are arranged side by side; the vibrating mechanism is arranged on the rack and connected with the rotation driving assembly; and the driving assembly is arranged in the mounting area on the shell and is connected with the rotation driving assembly. According to the travelling crane rail cleaning equipment, the cleaning efficiency and quality are improved, the abrasion and energy consumption of the equipment are reduced, and a powerful guarantee is provided for safe and efficient running of travelling cranes.

The invention relates to the technical field of stackers, in particular to a rigid anti-swing device of a stacker for an automatic stereoscopic warehouse, which comprises the stacker, a first-stage moving platform and a second-stage moving platform arranged on one side of the stacker, an objective table arranged above the second-stage moving platform, a scissor-fork type connecting rod mechanism, a buffer mechanism and a protection mechanism, the scissors fork type connecting rod mechanism is connected between the first-stage moving platform and the second-stage moving platform of the stacking machine. The shear fork type connecting rod mechanism is additionally arranged between the first-stage moving platform and the second-stage moving platform, the relative motion between the two platforms is forced to be single and determined linear motion, the connecting rigidity in the transverse direction and the vertical direction is greatly enhanced, and therefore basic shaking caused by sudden acceleration change and structural elastic deformation is restrained.

The utility model relates to a flexible photovoltaic support with a vibration reducing function, which comprises end part stand columns and a middle stand column, the middle stand column is arranged between the end part stand columns, the top of each end part stand column is fixedly connected with an installation cable, and two installation cables are arranged in pairs in parallel in a group. A triangular support is fixedly connected to the mounting cables arranged in pairs, a spring is fixedly connected to the bottom of the triangular support, a limiting piece used for limiting straightening of the spring is installed on the spring, a balancing weight is fixedly connected to the bottom of the spring through a first steel wire rope, and a ground pile is fixedly connected to the bottom of the balancing weight through a second steel wire rope. Various guarantees are provided, the vibration amplitude of the flexible photovoltaic support is effectively reduced, the structural safety is improved, meanwhile, the vibration reduction assembly can be effectively protected, and structural failure is avoided.

The invention discloses a laser level meter supporting structure, and belongs to the technical field of laser level meters, the laser level meter supporting structure comprises a supporting seat, the top of the supporting seat is provided with a plurality of fixing clamps, the outer side of the supporting seat is hinged with a plurality of supporting frames, and the outer edge of the top of the supporting seat is fixedly provided with an annular folding air bag; an inflation inlet is formed in the bottom of the annular folding air bag; the sealing plate is connected into the supporting seat in a sliding and sealing mode, a plurality of compression springs are fixedly connected to the bottom of the sealing plate, and the bottom ends of the compression springs are fixedly connected to the inner wall of the bottom of the supporting seat; and the triggering mechanism comprises a shot, a rotating disc, four push plates and four clamping bases, and an iron block is fixedly installed at the top of the shot. Through the arranged triggering mechanism, the supporting frame can be controlled to be opened outwards to improve the supporting stability when the laser gradienter vibrates or inclines greatly, the air bag is inflated, the laser gradienter is protected, and the use safety is improved.

The invention discloses a lifting device for an elevator car. The lifting device comprises a screw rod, a bearing base and a limiting top plate, wherein the elevator car is arranged between the bearing base and the limiting top plate, the bearing base is provided with a ball sleeve and a driving device used for driving the ball sleeve to rotate, and auxiliary supporting columns are arranged belowthe bearing base; the bearing base comprises a base, a bottom plate and an arc-shaped plate, wherein the arc-shaped plate is hinged to the bottom plate, the base is provided with a fixing groove, thebottom of the fixing groove is provided with through holes, and the auxiliary supporting columns pass through the through holes to temporarily support the bottom plate; and the driving device drives the ball sleeve to rotate, so that the bearing base is lifted along the screw rod, the bottom plate is gradually separated from the support of the auxiliary supporting columns, and the bottom plate andthe arc-shaped plate are pressed into the fixing groove through the elevator car under the guide of the arc-shaped plate. According to the lifting device, the elevator car is convenient and fast to install, and the elevator car can be easily replaced in the later period.

The utility model discloses a hanging scaffold device for vertical shaft construction in the technical field of vertical shaft construction, which comprises a hoisting derrick, a construction hanging scaffold component is arranged at the bottom of the hoisting derrick, the construction hanging scaffold component comprises a supporting top cover, a lifting controller is mounted at the bottom of the supporting top cover, and a construction hanging scaffold part is hoisted at the bottom of the lifting controller. The lifting controller comprises an electric control box body, and a guide cover plate is installed at the bottom of the electric control box body. According to the vertical shaft hanging scaffold device designed in the scheme, through cooperative use of the electric control box body, the guide cover plate and the winch protective cover, the situation that the two strands of hoisting steel cables are wound when the construction hanging scaffold assembly is hoisted and lifted can be prevented; and the auxiliary functions of buffering and damping, load self-adaption, steady-state guiding and the like can be achieved for the two hoisting steel cables subjected to winding adjustment, the operation stability, the anti-jamming capability and the use safety of the construction hanging scaffold component in the lifting process are improved, and structural damage and potential safety hazards caused by swinging, deflection or impact of the construction hanging scaffold component are effectively avoided.

A double-liquid vibration-damping liquid-shaking tank for a wind turbine tower drum oriented to source network load storage coordination belongs to the technical field of wind turbine vibration-damping equipment, is a liquid-shaking damping structure externally arranged on a wind turbine main body, and comprises a wind direction plate and a liquid-shaking tank structure consisting of an annular liquid-shaking tank, a liquid partition plate, upper-layer liquid and lower-layer liquid, and the turntable fixing structure consists of a rotor and a rotor flange plate. The annular liquid shaking cabin is provided with a central through hole, is sleeved on the tower drum, is internally provided with a liquid partition plate, and is filled with two-phase liquid which has density difference and is immiscible with each other; the wind direction plate is arranged on the outer side of the annular liquid shaking cabin; the liquid shaking damping structure is fixed to the wind turbine tower fixing section through the rotor flange plate. Single shaking liquid is replaced by stably layered immiscible double liquid, the vibration reduction effect of the shaking liquid damping structure is improved, and the shaking liquid damping structure is accurately adaptive to all working conditions; and through linkage of the wind direction plate and the liquid partition plate, the vibration reduction effect of the shaking liquid damping structure is improved, the resonance effect is restrained, and the stability of the vibration reduction effect of the shaking liquid damping structure is enhanced.

The invention discloses a preassembled shockproof box-type transformer substation, and relates to the technical field of transformer substations, the preassembled shockproof box-type transformer substation comprises a transformer box and a base, damping mechanisms are arranged on the two sides of the base, the damping mechanisms are connected with the side edges of the base through mounting plates, the damping mechanisms are self-adaptive hydraulic damping mechanisms, and each damping mechanism comprises a piston cylinder, a buffer rod, a trigger assembly and an adjusting assembly; the piston cylinder is filled with hydraulic oil and provided with a piston disc dividing an inner cavity of the piston cylinder into an upper cavity and a lower cavity, the upper end of the buffer rod is connected with the piston disc, and the lower end of the buffer rod extends out of the piston cylinder and is provided with a contact block. The problems that in the prior art, when a power transformation box is installed, due to the fixed damping characteristic, a traditional spring shock absorber cannot be adjusted in a self-adaptive mode to adapt to the variable falling speed and the box body weight, and the buffering effect is mismatched with the impact working condition are solved. The device has the advantages that impact energy of different intensities is effectively dissipated through a multi-stage buffering and automatic adjusting mechanism, and the safety of electrical elements in the box-type substation during installation and operation is ensured.

The invention relates to the technical field of drilling engineering, and discloses an impact-assisted rock breaking inwards-concave PDC drill bit which comprises a drill bit body and an impact structure, and the drill bit body is provided with an inner cavity and a first transmission protrusion arranged at the head of the drill bit body; the impact structure comprises a turbine, a transmission shaft and an impact blade, the turbine is arranged in the inner cavity of the drill bit body, the impact blade is arranged outside the drill bit body, the transmission shaft is connected between the impact blade and the turbine and provided with a second transmission protrusion, and the turbine is used for driving the transmission shaft to rotate; the second transmission protrusion and the first transmission protrusion abut against each other or are staggered in the rotating process. The impact cutter wings are used for stretching out relative to the drill bit body when the second transmission protrusions abut against the first transmission protrusions; a reset spring is further arranged between the transmission shaft and the drill bit body and used for driving the impact blades to reset when the second transmission protrusions and the first transmission protrusions are staggered. The high-frequency axial reciprocating motion of the impact blades directly crushes the center area of the drill bit, and the rock breaking efficiency of the center area of the drill bit is improved.

The invention discloses a coal mine deep high-stress roof stabilizing device based on a truss collaborative structure. The coal mine deep high-stress roof stabilizing device comprises a supporting module, a lifting supporting mechanism, a buffering mechanism and a flow guide filtering mechanism. The supporting modules are detachably and fixedly connected through a splicing structure, the lifting supporting mechanism is installed at the tops of the supporting modules and used for driving the supporting components to abut against a coal mine roof, the buffering mechanism is connected with the supporting components, and the flow guide filtering mechanism is arranged on the side portions of the supporting modules and used for receiving and treating roof seepage water. The invention discloses a roof stabilizing device suitable for a deep high-stress environment of a coal mine, the roof stabilizing device is composed of a supporting module, a lifting supporting mechanism, a buffering mechanism and a flow guide filtering mechanism, and through the design of convenient splicing locking, flexible buffering supporting and efficient flow guide filtering, the stability, operation efficiency and safety of roof supporting are improved.

The utility model provides a comprehensive anti-seismic support hanger for subway traffic, which belongs to the field of support hangers and comprises a connecting plate, the lower end face of the connecting plate is fixedly connected with a fixing frame, a buffer component is mounted on the connecting plate, the buffer component is fixedly connected with a group of connecting rods, and the group of connecting rods penetrate through the fixing frame in a sliding manner. A fixed plate is fixedly connected between the connecting rods in one group; a threading assembly; the threading assembly comprises a set of threading openings formed in the fixing plate, and sliding grooves are formed in the inner walls of the set of threading openings. According to the utility model, the clamping plate is matched with the inner wall of the threading port, so that the cable is fixed, the protection effect on the cable is improved, the cable is prevented from moving when the fixing plate vibrates up and down, the wear of the protection layer is prevented from being aggravated, the service life of the cable is prolonged, the protection effect is better, and the spring is matched with the damper, so that the device has a damping function; the stability of the device is improved; and the service life of the device is prolonged.

The invention belongs to the technical field of transportation devices, and particularly relates to a material carrying device, in particular to automatic stack stacking equipment and a working method thereof. The automatic stack stacking equipment comprises a manipulator arranged on one side of a workbench; every two buffering assemblies are symmetrically arranged on the workbench; comprising a limiting block which is arranged on a workbench in a lifting mode and is perpendicular to the workbench; the guide block is arranged in the limiting block in a lifting manner, and the upper end protrudes out of the limiting block; the bearing block is arranged on the side wall of the guide block in a sliding mode and is suitable for being contracted into the limiting block; wherein the manipulator clamps the electric pile and moves the electric pile to the inner side of each buffer assembly until the bottom wall of the electric pile abuts against the bearing block; the bearing block supports the electric pile and drives each guide block to slowly move downwards; after the lower end of the bearing block abuts against the limiting block, the bearing block gradually shrinks and moves towards the direction of the guide block till the bearing block shrinks into the limiting block, and the bottom wall of the electric pile is separated from the separating bearing block and abuts against the electric pile placed last time.

The application relates to the technical field of chemical metal raw material conveying, in particular to a metal raw material suspension conveying device based on chemical production, which comprises a conveying track and a sliding seat connected through a traction chain on the track, and the sliding seat is connected with an outer damping sliding pipe through a suspension chain. The metal raw material suspension conveying device based on chemical production can be accurately matched with the conveying requirements of different forms of metal raw materials such as powder, liquid and block: for powder or liquid metal, an adjustable hydraulic damper is used, a cylinder, a sliding inner plug, a containing cylinder and a compression spring are matched, and liquid sloshing leakage and powder partial load agglomeration are inhibited; for blocky metal, the hydraulic damper is used to release the "rigid impact" slowly, and the residual vibration after impact is quickly dissipated through a friction block, so that the fatigue damage of the tank body is avoided, a plurality of sets of equipment are not needed, enterprise cost is reduced, and workshop space is saved.

The utility model relates to the technical field of rainwater collection and utilization, and discloses a stacked rainwater recovery module which comprises a collection structure, a stacked structure and a filtering structure are installed on the collection structure, the stacked structure comprises a longitudinal rod, a driving box, a fixing block and a motor, the longitudinal rod is provided with a plurality of drainage plates through a rotating shaft, and the drainage plates are connected with the driving box. A rotating shaft is fixedly installed on the outer side of the longitudinal rod, a gear is fixedly installed on the rotating shaft and located on the outer side of the longitudinal rod, the driving box is fixedly installed on the longitudinal rod through a fixing block, a rack is installed on the driving box through a motor and a lead screw in a threaded mode, and the rack is meshed with the gear. The angle of the drainage plates is adjusted, the guiding direction and speed of water flow can be flexibly adjusted according to different rainfall intensity, wind speed and other environmental factors when rainwater enters the collecting box, the number of the drainage plates is three, the drainage plates are sequentially lengthened from top to bottom, and the situation that the water flow is gathered too fast is avoided.

The invention relates to a self-adaptive tuning inerter damping device and method for suppressing vertical micro-vibration of a structure. The self-adaptive tuning inerter damping device comprises a bearing base, a tuning mass block, a vibration system connecting the bearing base and the tuning mass block, a pneumatic control system and an intelligent measurement and control system. The vibration system is formed by connecting an outer side air spring set and a central air spring in series with a hydraulic inerter unit, an adjustable damping branch and a fixed inerter branch which are connected in parallel are integrated in the hydraulic unit and are respectively provided with an electro-hydraulic proportional valve and a spiral pipe type hydraulic inerter, so that adjustable damping and mass amplification are realized. The pneumatic system adjusts the air pressure of each air spring through an independent air path and a proportional valve so as to change the rigidity. An intelligent system monitors vibration through a sensor, a central controller identifies excitation frequency and optimizes parameters based on a kinetic model, and rigidity and damping are synchronously adjusted. According to the invention, the problem that a mechanical inerter is insufficient in response to micro-vibration is solved, the defects that a traditional passive device is narrow in frequency band and easy to detune are overcome, and broadband, self-adaptive and high-performance suppression of vertical micro-vibration of a structure is realized.

The invention relates to the related field of electrical engineering, in particular to a combined low-voltage electrical control cabinet which comprises a control cabinet body, a door leaf is hinged to the control cabinet body, a relay is connected to an installation area in the control cabinet body, and a supporting assembly is connected to the bottom of the control cabinet body. The supporting assembly comprises a connecting beam, and the top of the connecting beam is fixedly connected with the bottom of the control cabinet. When a pallet fork moves to the tail end in a limiting frame, the back face of a control cabinet makes contact with a pallet fork goods blocking frame, then a vertical rod on the goods blocking frame is inserted into the middle area of a first arc-shaped frame and a second arc-shaped frame, and when the pallet fork moves upwards, the pallet fork indirectly drives the first arc-shaped frame and the second arc-shaped frame to rotate through a guide plate; the first arc-shaped frame and the second arc-shaped frame are rotationally closed to be clamped and fixed to a vertical rod on the goods blocking frame, so that when the control cabinet is connected with a pallet fork on a forklift for transfer, the bottom and the back of the control cabinet and the pallet fork on the forklift are automatically connected, fixed and automatically detached in a multi-point mode, and operation steps are reduced.

The invention relates to a vertical high-speed motor active and passive vibration reduction system, which comprises a motor body, a motor base, a controller, a vibration sensor and an integrated active and passive pneumatic damping actuator, and is characterized in that the actuator is arranged between the motor body and the motor base; the vibration sensor is in signal connection with the motor body; the input end of the controller is in signal connection with the vibration sensor, and the output end of the controller is in signal connection with the high-speed switch pneumatic servo valve. According to the vertical high-speed motor active and passive vibration reduction system and vibration reduction method, a controller, a high-speed switch pneumatic servo valve and other components form an active damping system; and the damping pore plate and the auxiliary air chamber jointly form a built-in passive damping system. The passive damping system processes broadband vibration, and active control burden is reduced; and the active damping system achieves accurate suppression, and the overall energy efficiency ratio is increased. The active damping system and the passive damping system work in cooperation to jointly solve the vibration problem, so that the vibration problem of the vertical high-speed motor is rapidly and effectively suppressed.

The invention belongs to the technical field of quasi-zero stiffness vibration isolators, and particularly discloses a self-adaptive adjustment quasi-zero stiffness vibration isolator and a control method. Comprising a base and a bearing plate, and a plurality of positive stiffness units are arranged between the base and the bearing plate to provide basic support; the negative stiffness unit is arranged below the bearing plate, the two ends of the negative stiffness unit are connected with the adjusting structure through the moving unit capable of moving in the length direction of the driving unit, the adjusting structure is composed of a lead screw and an adjusting motor, the projection length of the negative stiffness unit in the horizontal direction can be changed, and therefore continuous adjustment of the negative stiffness is achieved. The vibration isolator is further provided with an acceleration sensor, a relative displacement sensor and a rotary encoder, and the sensors are connected with a processing unit to form a real-time monitoring and feedback control system. The low-frequency vibration isolation device can keep stable low-frequency vibration isolation performance under the condition change, and is suitable for high-precision equipment and complex industrial vibration environments.

The invention belongs to the technical field of wallboard supports for building construction, and particularly relates to an assembly type wallboard support for building construction and a mounting method thereof.The assembly type wallboard support comprises a wallboard, a fixing frame is fixedly mounted on the right side of the wallboard, a supporting rod is connected to the other end of the fixing frame, and the upper end of the supporting rod is connected to the fixing frame through a telescopic rod; a sleeve rod is inserted into the lower end of the supporting rod, a spring is arranged in the sleeve rod, the lower end of the sleeve rod is connected with a connecting frame, a bottom plate is fixedly installed at the lower end of the connecting frame, and a ground nail is inserted into the bottom plate. Through a reinforcing structure composed of the connecting sleeves, the connecting rods, the clamping sleeves, the fixing rods and the reinforcing rods, through threaded connection and locking bolt fixing, the overall stability and strength of the support are further enhanced, various external force borne by the wall plate can be better resisted, the reinforcing rods are inserted between the two fixing rods, and the fixing rods are fixed through matching of the locking bolts and threaded insertion grooves; and the connection strength between the fixing rods and the stability of the whole structure can be enhanced.

The refractory castable aggregate screening and receiving device comprises a main body supporting seat, a base plate seat is connected to a working table of the main body supporting seat, the base plate seat is connected with a material screening group, and the material screening group comprises a multi-stage screening part and a screening driving part; the multi-stage screening part comprises screening frameworks, a middle connecting seat, a first-stage screening plate and a second-stage screening plate, the second-stage screening plate is installed between the screening frameworks, the middle connecting seat is arranged between the second-stage screening plate and the first-stage screening plate, and continuous and accurate graded screening is achieved through the first-stage screening plate and the second-stage screening plate. Compared with a traditional single-stage screening structure, materials with different particle sizes can be more effectively separated, loss of qualified fine particles is reduced, it is ensured that the particle sizes of products meet the requirement, the problem that the qualified fine particles are mistakenly screened out in traditional equipment is solved through an accurate screening mechanism, the material utilization rate is increased, and unnecessary waste is reduced.

The invention discloses a built-in electromagnetic valve type semi-active shock absorber and a working method, the built-in electromagnetic valve type semi-active shock absorber comprises a working cylinder, a floating piston is arranged in the working cylinder, and an inner cavity of the working cylinder is divided into an air cavity and an oil cavity by the floating piston; the damping adjusting valve is slidably arranged in the oil cavity and divides the oil cavity into a compression cavity and a recovery cavity, and the upper end of the damping adjusting valve is connected with the piston rod; the damping adjusting valve comprises a valve body, a containing cavity is formed in the valve body, and a main valve seat hole is formed in the lower end face of the valve body. The main valve seat hole is communicated with the accommodating cavity in the valve body and the compression cavity; the valve core comprises a main valve core, a main valve spring and a main valve spring seat; the main valve spring seat is fixed in a containing cavity of the valve body assembly, and a pilot cavity is formed by the main valve spring seat and the electromagnetic valve assembly; the main valve spring is arranged between the main valve spring seat and the main valve element in a sleeved mode and abuts against the main valve element on the end face of the main valve seat hole. And the main valve core and the main valve seat hole form a main valve port. According to the built-in electromagnetic valve type semi-active shock absorber and the working method, machining is easy, and meanwhile the quick response capacity is achieved.

The utility model provides efficient tamping equipment for roadbed engineering, and relates to the technical field of roadbed engineering construction, the efficient tamping equipment comprises a movable pushing frame, the top of the movable pushing frame is rigidly connected with a driving assembly, the middle of the movable pushing frame is provided with a vertically-through connecting sliding hole, and the inner surface of the connecting sliding hole is slidably connected with a tamping hammer assembly; the top of the rammer assembly is fixedly connected with a lifting sliding plate. The threaded column is rotated by rotating the knob to drive the threaded sliding plate to slide in the sliding groove, so that the position of the connecting sliding column is changed, accurate adjustment of the height of the rammer assembly is achieved, the falling height and the ramming force of the rammer can be flexibly adjusted according to different roadbed construction requirements through the structural design, and the construction efficiency is improved. When shallow soft soil is treated, the height of the rammer is reduced, and excessive compaction is avoided; when deep hard soil is treated, the height of the rammer is increased, the tamping depth is guaranteed, the construction efficiency and quality are effectively improved, and the problem that tamping parameters of existing equipment cannot be adjusted is solved.

The invention relates to a vibration-free concrete surface finishing, wiping, pressing and finishing device which comprises a vehicle body and at least two tire sets installed on the vehicle body, and each tire set comprises two tires which are coaxially arranged. The crawler belt is used for connecting the at least two tire groups in a transmission manner; the wiping and pressing blades uniformly cover the outer surface of the crawler belt in the transmission direction of the crawler belt; the buffer part is used for reducing disturbance of the plastering and pressing blade to the surface of concrete in the plastering and pressing process, one end of the plastering and pressing blade is hinged to the outer surface of the crawler belt, and the other end of the plastering and pressing blade is connected to the outer surface of the crawler belt through the buffer part. The contact area with the concrete surface is increased in the mode that the wiping and pressing blade is arranged on the crawler belt, meanwhile, the wiping and pressing blade is connected with the crawler belt through the buffering piece, disturbance of the wiping and pressing blade to the concrete surface during wiping is reduced, and the construction quality is improved.

A dual-liquid vibration damping sloshing chamber for wind turbine towers, oriented towards source-grid-load-storage synergy, belongs to the technical field of wind turbine vibration damping equipment. It is a sloshing damping structure externally mounted on the wind turbine body, including a wind vane, a sloshing chamber structure consisting of an annular sloshing chamber, liquid baffles, upper liquid, and lower liquid, and a turntable fixing structure consisting of a rotor and rotor flange. The annular sloshing chamber has a central through hole, is fitted onto the tower, contains liquid baffles, and is filled with two immiscible liquids with different densities. The wind vane is arranged outside the annular sloshing chamber. The sloshing damping structure is fixed to a fixed section of the wind turbine tower via the rotor flange. This invention improves the vibration damping effect of the sloshing damping structure by replacing a single sloshing liquid with a stable, layered, immiscible dual liquid, accurately adapting to all operating conditions. Through the linkage of the wind vane and liquid baffles, the vibration damping efficiency of the sloshing damping structure is improved, the generation of resonance effects is suppressed, and the stability of the vibration damping effect of the sloshing damping structure is enhanced.

The utility model discloses a furfural aldehyde gas ORC waste heat recovery device, which belongs to the technical field of waste heat recovery and comprises a first material pipe and a second material pipe, the second material pipe is connected with a heat exchange device through a second pipeline, a waste heat recovery drying box is mounted outside the heat exchange device, and a buffer support base is arranged below the waste heat recovery drying box. A drying heat preservation assembly is arranged on the portion, located in an inner cavity of the waste heat recovery drying box, of one side of the heat exchange device and can provide heat preservation and drying for the heat exchange device, so that the waste heat recovery efficiency is improved, and a pipeline anti-blocking vibration cleaning assembly is arranged on the portion, located on the inner wall of the waste heat recovery drying box, of one side of the drying heat preservation assembly. The pipeline anti-blocking vibration cleaning assembly exerts force to hit the heat exchange device, so that dirt in a pipeline in the heat exchange device is vibrated, falls off and is discharged. Therefore, the waste heat recovery efficiency and quality are improved, and waste heat loss is reduced. The waste heat recovery device improves the waste heat recovery efficiency.

Anti-vibration units are provided for vibration suppression in multiple directions. The anti-vibration units may have an X-shaped structure as part of its support structure. The anti-vibration units can work for ultra-low frequency vibration isolation in three directions in a passive manner. The anti-vibration units can achieve a flexible nonlinear stiffness, which contains zero or quasi-zero stiffness, negative stiffness and positive stiffness. A smooth multi-equilibria state is also achievable. Compared with traditional spring-mass-damper (SMD) and typical QZS systems, the provided anti-vibration units can have an enhanced QZS range of larger stroke with guaranteed loading capacity, and can also achieve a lower resonant frequency with a lower resonant peak. At least some embodiments of the anti-vibration units may include a new and innovative arrangement of components that enables a more compact design than typical anti-vibration systems.

The invention discloses an active vibration isolation system. The active vibration isolation system includes a plurality of vibration isolation devices and a diagnostic device. Each of the plurality of vibration isolation devices has an actuator and a state sensor. In the first determination process, the diagnostic device executes a dynamic diagnosis for individually determining the presence or absence of an abnormality in the state sensor for each of the plurality of vibration isolation devices by operating at the same time two or more actuators among the plurality of vibration isolation devices, and in the second determination process, the diagnostic device executes a dynamic diagnosis for determining the presence or absence of an abnormality in the state sensor. The diagnostic device individually determines the presence or absence of an abnormality in the actuator for each of the plurality of vibration isolation devices by sequentially operating the actuator one by one, and outputs the determination results of the first determination process and the second determination process to at least one of the external device and the notification unit. In an active vibration isolation system comprising a plurality of active vibration isolation devices, the presence or absence of an abnormality in element parts of each active vibration isolation device is more accurately determined.

The invention discloses a multi-stage spring multi-directional vibration reduction base for a wafer chamfering machine in the field of semiconductor processing, and the base comprises a supporting housing which is a cylindrical housing with a closed bottom, and the top of the supporting housing is closed through a bearing platform; the main vibration reduction assembly and the supporting shell are concentrically and fixedly arranged on the bottom face of the supporting shell; the auxiliary vibration reduction assembly is annularly arranged on the periphery of the main vibration reduction assembly and is also fixedly arranged on the bottom surface of the supporting shell; the upper vibration reduction assembly is fixedly arranged at the tops of the main vibration reduction assembly and the auxiliary vibration reduction assembly and is connected with the bearing table in a clamping manner; the radial vibration reduction assembly is fixedly clamped on the bottom surface of the bearing table and is arranged in the side wall of the supporting shell in a sliding manner; the wafer chamfering vibration reduction device has the beneficial effects that the main vibration reduction assembly, the auxiliary vibration reduction assembly, the upper vibration reduction assembly and the radial vibration reduction assembly are arranged, the multiple vibration reduction assemblies cooperate to dissipate vibration energy, the rigidity of all the vibration reduction assemblies can be set, the wafer chamfering vibration reduction device can be matched with various chamfering machines, and the wafer chamfering quality can be effectively improved.

To improve the strength of the screw threads. [Solution] The bicycle power transmission device comprises a first rotating body, a second rotating body, an elastic member, a stopper member, and a first nut. The first rotating body has a stopper surface facing in the circumferential direction. The second rotating body is arranged to be rotatable relative to the first rotating body. The elastic member elastically connects the first rotating body and the second rotating body. The stopper member is attached to the second rotating body. The stopper member has a stopper portion and a first threaded portion. The stopper portion faces the stopper surface in the circumferential direction. The first threaded portion is integrally formed with the stopper portion and extends in the axial direction. The first nut is screwed onto the first threaded portion.

The invention provides an aviation opening, supporting and closing locking mechanism and method. The aviation opening, supporting and closing locking mechanism comprises a side guide rail body, a base, a supporting lock sleeve and a supporting lock hook assembly. When the side guide rail body rotates to a horizontal closed state, the supporting lock sleeve and the supporting lock hook assembly are clamped and fixed to achieve locking. And when the side guide rail main body rotates to an open supporting state, the bottom surface of the supporting lock sleeve is supported on the top surface of the supporting lock hook assembly to realize stable supporting. The device is small in structural size, light in overall weight, convenient to operate and convenient to install, the requirements for rapid overturning opening and rapid closing locking of the side guide rail can be met, the buffering function is achieved in the closing process, and safety is improved. The device is complete in overall function, reliable in structure, high in man-machine work efficiency and low in failure rate.