201results about How to "Play a role in damping" patented technology

The invention discloses a device for testing the performance of an automotive steering system, comprising a steering simulating system, an axial loading system, a suspension fork simulating system and an automotive steering system, wherein the steering simulating system is used for simulating the rotation of a steering wheel in an automatic and manual mode; the axial loading system is used for simulating a steering load and loading the steering load to the automotive steering system (comprising a steering column, a steering gear, a tie rod and a simulation steering knuckle) through a Bell mechanism; the suspension fork simulating system is used for simulating wheel jumpiness during driving. The device for testing the performance of the automotive steering system is used for experimenting and testing the steering performance of an automotive steering in various driving conditions, such as experiments and tests of kinematic and mechanic parameters of full angle, transmission ratio characteristic, transmission clearance characteristic, transmission efficiency characteristic, driving moment, rigidity, relationship between steering performance and suspension fork jumpiness and the like. The device directly simulates the steering wheel to load the automotive steering through the Bell mechanism, so that the testing result is closer to a real working condition.

The invention discloses a screw-type compressor with adjustable interior volume specific ratio, comprising a compressor housing and an exhaust end housing, wherein a screw rotor is arranged between the compressor housing and the exhaust end housing; an air suction port is arranged on the compressor housing; an axial exhaust port and a radial exhaust port are arranged on the exhaust end housing; an actuating part is arranged at the radial exhaust port; the compressor housing or the exhaust end housing is also provided with a cylinder body in which a piston is arranged; an oil inlet side of the cylinder body is provided with an oil inlet; an oil outlet side of the cylinder body is provided with at least two oil outlets along the axial direction; one end of a piston rod is connected with the piston, and the other end thereof is connected with the actuating part; and the radial exhaust port is arranged on the actuating part. In the invention, the interior volume specific ratio of the screw-type compressor can be adjusted according to needs, and the screw-type compressor has strong adaptability and good energy saving effect.

The invention provides polyacrylic ester interpenetrating network polymer emulsion and highly damped materials, pertaining to the high molecular polymer technological field. The polymer emulsion group consists of protecting adhesive, emulsifier, activator, buffering agent, cross-linking agent, water and monomers, wherein, the monomers comprises butyl acrylate, methacrylic acid, acrylic acid epoxy propyl ester, cinnamene, etc., and polymerize in an interpenetrating network shape. The highly damped materials used for decreasing vibration of vehicles are prepared by the emulsion after addition agent, filing materials and water are added. Since the emulsion of the invention, hollow glass microbeads and talc are used as the important components of the filling materials, the high molecular adhesive and elastic material of the invention has better damped performance, the tenacity and elasticity of the material are enhanced, the intensity of tension, and flexural rigidity resistance and wearing resistance of the material are improved, therefore, the effects of vibration decreasing, noise decreasing, sound and heat insulation can be achieved under various complicated conditions.

The invention relates to a piezoelectric-ceramics-based high-speed high-precision macro-micro platform and a switching method. The macro-micro platform comprises a platform base plate and a voice coil motor, wherein the platform base plate is disposed on a vibration isolation pedestal, the voice coil motor is disposed at one side of the platform base plate, and the voice coil motor comprises a voice coil motor shell, a voice coil motor magnet assembly, a voice coil motor coil, a voice coil motor linearity encoder and a motor shaft connecting rack. Because the voice coil motor is used to drive the platform to feed in a large stroke and a high speed, and a piezoelectric ceramics is directly connected with an output shaft of the voice coil motor, the macro-micro platform is compact in structure and easy to feedback control. Additionally, the platform is provided with the piezoelectric ceramics which plays a vibration damping effect on the high-speed motion platform by applying an opposite acting force, so that the problem that the high-acceleration motion platform is large in vibration and hard to be stable rapidly; and after the platform is stable, the piezoelectric ceramics switches functions for driving the micro platform to move, and by closed ring control of an absolute grating, the precision positioning of platform micro motion is realized.

The invention provides an elastic supporting structure. The elastic supporting structure comprises a cylindrical supporting body (1); the supporting body (1) is arranged on a machine case (7); the supporting body (1) comprises a bearing loading seat (2) and a plurality of elastic cage bars (3); a gap is formed between the circumferential outer wall of the bearing loading seat (2) and the machine case (7), and lubricating oil is filled in the gap so as to form an extrusion oil film damper; and the circumferential outer wall of the bearing loading seat (2) is an oil film shaft neck (4) of the extrusion oil film damper. The elastic supporting structure has a supporting structure that the elastic cage bars are combined with the extrusion oil film damper, the extrusion oil film damper has the vibration reduction function, the deformation of elastic supporting can be reduced and limited, and the reliability of the structure is greatly guaranteed; and the elastic cage bars have the function of adjusting the critical speed of a rotor system.

The invention discloses a nonlinear tunable mass and liquid damper used by combining a tunable mass damper and a tunable liquid damper through nonlinear springs. The nonlinear tunable mass and liquid damper comprises a solid mass block, a cavity, internal viscous liquid, a plurality of universal wheels, a preserved hole and a nonlinear spring device. The solid mass block and a closed shell outside the solid mass block serve as a center structure. The viscous liquid with a certain volume is added in the cavity and can circulate in the reserved hole in the mass block. The center structure is connected with baffles or walls on the periphery through the four sets of nonlinear springs outside the cavity. Rotating shafts are arranged at the joints between the nonlinear springs and the baffles or walls so that the nonlinear springs can horizontally rotate. The universal wheels are arranged at the bottom of the center structure so that the damper can freely move in the horizontal plane. According to the working principle, energy input into a building through an earthquake or / and wind vibration is dissipated by means of the mass of the solid block, the non-linear springs and friction force provided when the viscous liquid flows through the small hole in the solid block. The nonlinear tunable mass and liquid damper integrates the advantages of the tunable mass damper and the tunable liquid damper, is installed on the top of a high-rise building, and is simple and reliable in structure, low in manufacturing cost and capable of achieving the good damping effect.

The invention discloses a smart quadruped robot with a flexible waist. The smart quadruped robot with the flexible waist comprises a front body, a rear body, a waist mechanism, crotch mechanisms and leg mechanisms. The front body and the rear body are connected through a split Hooke joint, so that relative deflection and pitching of the front body and the rear body are realized. The front body and the rear body are respectively provided with two crotch mechanisms, wherein output shafts of the crotch mechanisms are made to face the outer side of the bodies so that the leg mechanisms can be installed; the output shafts are meshed with bevel gears between transmission shafts for transmission, so that the output shafts are driven through rotation. A fixed shaft is fixed to each crotch mechanism, and the fixed shafts are driven to rotate to rotate a gearbox; in this way, the leg mechanisms can swing front and back as well as up and down. Each leg mechanism comprises a thigh part and a calf part, wherein each thigh part and each calf part are connected through a knee joint; transmission of the knee joints is realized through two bevel gears, so that the calf part made to swing front and back relative to the thigh part. The smart quadruped robot with the flexible waist has the advantages that the capability of passing through a mountain environment of the robot can be improved, the turning radius in the advancing process is reduced, rotational inertia of legs of the robot is reduced, and the energy utilization rate is increased.

The invention relates to the field of general building structures, in particular to a self-adaptive variable frequency tuned mass damping device and a self-adaptive frequency variation method for controlling the vibration of a high rise or tall building. The self-adaptive variable frequency tuned mass damping device overcomes the defects that the prior tuned mass damper cannot well control the vibrations of a plurality of frequencies of a controlled structure, has a simple structure and needs the support from external energy. The self-adaptive variable frequency tuned mass damping device comprises a tuned mass damper which comprises a mass block, a damper and an elastic component, wherein the self-adaptive variable frequency tuned mass damping device also comprises a small spring mass system with a specific natural frequency; and the small spring mass system consists of the elastic component and a small mass block and is connected with the tuned mass damper through variable rigidness driving systems which are connected in a parallel mode or in a series mode. The self-adaptive variable frequency tuned mass damping device achieves the aim of better controlling the vibrations of a controlled structure at a plurality of frequencies and has the advantages of simple structure, convenient manufacture, no need of external energy in work, and low cost.

The present invention belongs to the field of deep water mooring technology. One of the deep water mooring system has ordered floats set between anchor base and the anchor chain or anchor cable of the anchored object and weight blocks between each two floats; and one other deep water mooring system has floats and weight blocks between each two floats set in only one part of the anchor chain or the anchor cable. The present invention has the advantages of altered self vibration period of the system, increased horizontal rigidity and damping of the deep water mooring system, reduced the designed bearing capacity of the anchor base, reduced water area the mooring system occupies and no overlarge tension of local anchor chain or cable.

The invention belongs to the technical field of physics and semiconductor measurement, and particularly relates to a two-dimensional magnetic field probe table measuring system. The measuring system comprises a base, a two-dimensional magnetic field electromagnet, an object table clamping plate arranged in the center of the magnetic pole of the electromagnet and fixed on the base, a probe table and a microscopic measuring device, wherein an opening is formed in the middle of the probe table, a plurality of direct-current and high-frequency probe seats and probes are arranged around the opening, the probes are in contact with samples on the object table clamping plate through the opening, and a plurality of direct-current and high-frequency instruments are connected with the probes to measure the samples in the magnetic field environment. According to the integrated and intelligent two-dimensional magnetic field probe table measuring system, the measurement function of the two-dimensional magnetic field probes can be realized; more probe seats and probes can be placed, so that relatively complex measurement in the magnetic field environment can be realized; the mechanical vibration is small, the flexibility is good, the cost performance is high, and the application scenes are wide.

The invention discloses a dual-area slotting blast hole arrangement structure and a blasting sinking method applied to the structure. The structure comprises two blasting slotting hole areas symmetrically arranged with respect to the center of the free face of a courtyard, each blasting slotting hole area comprises a center charging hole and a plurality of empty holes arranged around the center charging hole; a ring of peripheral holes are formed in the periphery of each blasting slotting area, the center charging holes and the peripheral hoes are filled with explosive charges, and a plurality of auxiliary holes are formed between the blasting slotting areas and the peripheral holes and are filled with explosive charges. The method is simple in working procedure, operation is easy, the one-time sinking height is large, reliability is high, the sinking effect is good, the number of drilled holes is small, energy consumption is low, and the blasting vibration is small.

The invention relates to a camshaft adjuster (1) for adjusting and fixing the relative position of the angle of rotation of a camshaft (8) in relation to the crankshaft of a reciprocating piston internal combustion engine. Said adjusting device comprises a high transmission and friction-reduced adjusting gear mechanism (2), comprising a drive shaft which is rotationally fixed to the crankshaft, a driven shaft which is rotationally fixed to a camshaft (8) and an adjusting shaft (9) which is connected to an adjusting motor shaft (10) of an adjusting motor. A camshaft adjuster (1), which is economical to run, can be produced such that the adjusting gear mechanism (2) and the adjusting motor (3) are embodied as separate units and are connected together by a rotational backlash-free, disengaging clutch (4).

The invention belongs to the field of vibration control, and in particular relates to a shear mode magnetorheological fluid damper and a magnetorheological fluid damping vibration isolator with periodic impedance distribution formed by the magnetorheological fluid. The invention comprises a magnetorheological fluid damper and a magnetorheological fluid vibration isolator, the magnetorheological fluid damper and the magnetorheological fluid vibration isolator are connected by a flange, and a sealing ring is arranged at the joint for sealing; the magnetorheological fluid The damper includes three parts: the working cylinder, the piston assembly and the accumulator; the working cylinder includes the cylinder barrel, the upper cover and the piston assembly; the piston assembly includes the hollow piston rod, the piston head installed at the end of the piston rod, Piston guide, magnetic core on piston rod. When no current is applied or the control system fails, the magneto-rheological fluid damping isolator becomes a traditional damper, which also has a certain damping force and can play a role in reducing vibration. The arrangement of multi-layer electromagnets constitutes a phonon crystal structure, and the introduction of a phonon crystal structure can realize the isolation of elastic wave vibration in the middle and low frequency bands.

The invention discloses an electromechanical equipment fixing device and a using method thereof. A vibration damping base comprises a T-shaped hole, grooves, wavy springs, a T-shaped column, a vibration damping cavity, sliding rails, first sliding blocks, second sliding blocks, vibration damping springs, buffer rods, first shaft seats and adjusting screws; the T-shaped hole is formed in the middlepart of the upper end of the vibration damping base; the grooves are uniformly formed in the lower end of the T-shaped hole; the wavy springs are arranged in the grooves; the T-shaped column is arranged at the parts, corresponding to the interior of the T-shaped hole, of the upper ends of the wave springs; vibration damping cavities are formed in the parts, corresponding to the two sides of the T-shaped hole, of the upper end of the vibration damping base; and the sliding rails are arranged at the inner side walls of the vibration damping cavities. With the adoption of the electromechanical equipment fixing device, a main body of electromechanical equipment is radiated advantageously; the main body of the electromechanical equipment is prevented from loosening advantageously and the stability of the electromechanical equipment fixing device is further strengthened; and a vibration damping function is played advantageously, thereby maximizing the vibration damping effect of the whole vibration damping base and reducing the probability of damage to the main body of the electromechanical equipment caused by vibration.

The invention discloses a passive damping device for a solar panel. The passive damping device is arranged between a solar panel driving mechanism and a panel support. The passive damping device comprises a middle column, an upper flange, a lower flange and a damper. The upper flange and the lower flange are connected with the top end and the bottom end of the middle column. The upper flange is connected with the solar panel driving mechanism. The lower flange is connected with the panel support. The damper is arranged on the outer side of the middle column and is connected with the upper flange and the lower flange. High-damping-characteristic viscous-elastic materials are arranged between an inner shearing piece and an outer shearing piece. The passive damping device is high in reliability, long in service life and easy to mount, the passive damping device can be directly connected between the solar panel driving mechanism and the panel support, a panel structure does not need to be changed in a large-scale mode, the extra modal damping ratio is provided for each stage of vibration mode of a solar panel system, flexibility vibration of the solar panel can decline quickly, and the purpose that satellite platform control accuracy is improved is achieved.

The invention relates to a mixing extrusion pelleting machine set. An underwater pelleting device of the mixing extrusion pelleting machine set is provided with a machine head template and a pelleting cutter head, wherein the machine head template is arranged on the wall surface of a hot water chamber and sealed, the cutter head is arranged in the hot water chamber through the end of a cutter shaft, a driving motor is in driving connection with the cutter shaft through a coupling, the cutter shaft is arranged in a bearing box and driven by a piston rod of a cylinder, the bearing box is arranged on a trolley bracket, trolley wheels are placed on a guide rail, and the cylinder drives a trolley to move along the guide rail so as to combine and separate the pelleting cutter head and the temperate. The mixing extrusion pelleting machine set rotates at high speed close to a discharge template in the water chamber filled with deionized water during operation, so as to finish pelleting. Cut particles are conveyed to a downstream device along with cooling water. The machine set is safe, is favorable for prolonging service life of the template and a pelleting cutter, and controls a system with simple and easy operation.

The invention discloses a vibration-reduction hub which comprises a rim, a hub body and spokes, wherein the hub body is located in the center of the rim; and the spokes are evenly arranged between the rim and the hub body. Each spoke comprises a hydraulic cylinder; a piston rod of each hydraulic cylinder is connected with the inner side of the rim; and a cylinder body of each hydraulic cylinder is connected with the outer side of the hub body. Each spoke further comprises a connecting piece with an elastic deformation function. The connecting pieces are arranged between the hydraulic cylinders at intervals. One ends of the connecting pieces are connected with the inner side of the rim. The other ends of the connecting pieces are connected with the outer side of the hub body. According to the vibration-reduction hub, on the basis that rigid spokes of a conventional hub are modified to be provided with the flexible hydraulic cylinders, the connecting pieces with the elastic deformation function are additionally arranged for the spokes, the impact acting force of road surfaces to the hub is counteracted by the combined action of extensible deformation generated continuously and alternately by the connecting pieces and action of the hydraulic cylinders, accordingly vibration of the hub is further reduced, and the vibration resistance of the hub is improved.

The invention discloses a movable optical fiber active take-up and pay-off assembly, and relates to a device for unfolding or releasing filamentary materials. The movable optical fiber active take-up and pay-off assembly comprises a rotating pay-off mechanism and a horizontal reciprocating moving mechanism. The rotating pay-off mechanism comprises a servo motor, a pay-off support and other components. The servo motor supplies pay-off power to drive an optical fiber disc to rotate at high speed, and then active pay-off of optical fibers is achieved. The moving mechanism and the pay-off mechanism jointly achieve the active take-up and pay-off function in the mode that the servo motor drives a linear platform to conduct reciprocating linear motion according to steering signals sent by a steering control assembly. In addition, a plurality of rubber shock absorbers are fixedly arranged between a frame and the linear platform. The movable optical fiber active take-up and pay-off assembly is simple in structure, low in cost, easy and convenient to install and high in bearing strength, can effectively reduce and isolate vibration, reduce the adverse effects of vibration on equipment and make the equipment more stably and effectively conduct production, has the remarkable denoising effect and can remarkably improve the working environment.

The invention discloses a suspended type monorail transit track beam, belongs to the technical field of rail traffic and aims at providing the suspended type monorail transit track beam. By improvingthe vibration absorbing performance of the suspended type monorail transit track beam, the train running comfort is improved. The suspended type monorail transit track beam comprises a track beam topplate, track beam web plates and track beam bottom plates, wherein the track beam web plates are arranged on the left and right sides of the track beam top plate, and the track beam bottom plates arearranged on the internal side walls of the track beam web plates; vibration absorbing rubber pads are arranged on the track beam bottom plates; running rails are arranged on the vibration absorbing rubber pads; and the running rails are connected to the track beam bottom plates through fastener systems. The suspended type monorail transit track beam is applicable to the suspended type monorail transit track beams.

The invention relates to a single-pile offshore floating fan vibration reduction control structure. The structure comprises an annular steel truss arranged outside a floating fan foundation platform and a plurality of lattice steel trusses integrated with the annular steel truss and used for being connected with a floating fan tower in the center, wherein each lattice steel truss is connected with the upper portion of the floating fan tower through a steel strand, the bottom of each lattice steel truss is connected with the lower portion of the floating fan foundation platform through a lattice steel truss steel support, the annular steel truss is connected with the upper portion of the floating fan foundation platform through an annular steel truss steel support, and a tuned mass damper is arranged in each lattice steel truss. Compared with the prior art, the structure has the advantages that structural vibration is reduced, safety and stability are high, annular multi-directional control is achieved, and wave load impact is reduced.

The invention belongs to the field of damper performance testing devices and specifically discloses a parameter adjustable squeeze oil film damper performance testing device which comprises a false shaft, an oil film assembly and a supporting base. The oil film assembly includes an oil film inner ring and an oil film outer ring. The oil film inner ring is sleeved on an outside of the false shaft,and is matched with the false shaft through a tapered surface. The oil film outer ring is sleeved on one end, positioned near the false shaft, of the oil film inner ring; the oil film outer ring cooperates with the oil film inner ring to form an oil film gap, the oil film outer ring is connected to the supporting base through an oil film outer ring support member, and the oil film outer ring support member is provided with an oil inlet hole; a rigidity adjustable elastic rod is disposed between the oil film outer ring support member and one end, positioned away from the false shaft, of the oilfilm inner ring. The elastic rod is provided with a left adjusting check ring and a right adjusting check ring that are adjustable in position, an oil outlet hole is formed on the supporting base andis sleeved outside the oil film inner ring. The testing device disclosed in the invention can provide different test rigidity variables and different oil film thickness and width variables; the testing device is advantaged by adjustable test conditions, a large quantity of test conditions, rich test measurement parameters and the like.

The invention discloses an interior trimming panel of an automotive ceiling. The interior trimming panel of an automotive ceiling comprises an upper supporting plate and a lower supporting plate, wherein the upper supporting plate is connected with the lower supporting plate through a plurality of elastic connecting pieces; the elastic connecting pieces are elongated partitions; a groove is formed in the bottom of the lower supporting plate; a cover plate is arranged on the groove; one end of the cover plate is rotatably connected with the lower supporting plate; a buckle is arranged at the other end of the cover plate; a slot which corresponds to the buckle is formed in the lower supporting plate; and a plurality of through holes are formed in the cover plate. The elastic connecting pieces has certain buffering and vibration damping effects, and injury of collision to human bodies is reduced. Activated carbon is arranged in the lower supporting plate, and can purify air in an automobile. After the activated carbon fails, the cover plate can further be opened to change the activated carbon.

The invention provides a turbine rotor blade and a gas turbine with the same. The turbine rotor blade comprises a shroud, a blade body and a tenon, the shroud comprises a first pre-twist contact surface and a second pre-twist contact surface, wherein the first pre-twist contact surface is peripherally arranged at a first peripheral end of the shroud, and the second second pre-twist contact surface is peripherally arranged at a second peripheral end of the shroud. Arrangement of the first pre-twist contact surface and the second pre-twist contact surface includes that after a plurality of turbine rotor blades are assembled, the second pre-twist contact surface of each turbine rotor blade is matched with the first pre-twist contact surface of each adjacent turbine rotor blade in an extrusion manner, so that the shrouds of each two adjacent turbine rotor blades jointly generate a pre-twist angle by using a blade stacking shaft as the axis. According to the technical scheme, the shrouds of each two adjacent turbine rotor blades have the pre-twist moment with the direction opposite to that of the moment generated by gas impact force, so that twist and bending deformation of the blades in work can be effectively inhibited, and flow blade profile loss is reduced.

The invention discloses a special segmented boring bar with double guide support and used for boring machining for inner annular grooves of deep holes. The boring bar comprises a guide part, a cutter bit part, a cutter advancing-retreating control part, an axial location part, an auxiliary support part and a bar body part, wherein a guide head is connected with the front end of a sleeve by virtue of dowels, the auxiliary support part is connected with the sleeve by virtue of spherical screws, and due to the combination of the guide head and auxiliary support blocks, the partial static rigidity of the cutter bit can be greatly improved; a front baffle is connected with the front end of the guide head by virtue of a screw, and a rear baffle is connected with the rear end of the sleeve by virtue of a screw; and three uniformly-arranged blades are arranged in the peripheral direction of the cutter bit part, and capable of counteracting a radial force and a tangential force during cutting, and further improving the rigidity of the cutter bar. The special segmented boring bar with double guide support, which is disclosed by the invention, is applicable to boring machining for inner annular grooves of deep holes with large length-diameter ratios and multilayer deep holes; and compared with a boring bar in the prior art, the machining range is wider, and the machining surface quality and machining accuracy are remarkably improved.

The invention discloses a damping vibration attenuation metacentric-type electric spindle centrifugal machine and aims at solving the problems that a motor rotor of an existing chemical fiber and textile fiber centrifugal spinning electric spindle centrifugal machine is in a rigid connection with a centrifugal spinning pot of the existing chemical fiber and textile fiber centrifugal spinning electric spindle centrifugal machine, and in the process of starting, normally operating and stopping of the electric spindle centrifugal machine, the factors such as manufacturing and installation of the centrifugal spinning pot, and spinning and spindle forming of the fiber in the centrifugal spinning pot cause dynamic unbalanced inertia moment to influence normal operation of equipment and even damage the equipment. The damping vibration attenuation metacentric-type electric spindle centrifugal machine comprises a base, an electric spindle shell body, the motor rotor, a hollow output shaft, a cone-shaped central spindle, the centrifugal spinning pot and an upper back-up bearing. On the premise of fully retaining the advantages of the existing electric spindle centrifugal machine, the damping vibration attenuation metacentric-type electric spindle centrifugal machine is capable of effectively improving reliability of equipment operation, prolonging service life, reducing power loss and energy consumption, improving the comprehensive performance index of the equipment through adoption of an improved structure, and effectively solves the problems of fatigue bearings, short service life, large energy consumption, high damage rate and high manufacturing cost, and the like of the existing electric spindle centrifugal machine.

The invention discloses a shock absorption device for building vibrating equipment. The shock absorption device for the building vibrating equipment comprises a base plate and a shock absorber. The shock absorber comprises a base cylinder and a supporting component. The base cylinder comprises a cylinder body part and an upper extension part, and the upper extension part extends into the supporting component. The shock absorber further comprises a first supporting spring which is arranged on the cylinder body part in a supporting mode and used for supporting the supporting component and a second supporting spring which is arranged on the upper extension part in a supporting mode and used for supporting the internal bottom of the supporting component. The shock absorber further comprises a torsional shock absorption mechanism which is arranged in the cylinder body part. A linkage rod is integrally formed in the supporting component, stretches into the cylinder body part from the upper extension part and is in transmission fit with the power input end of the torsional shock absorption mechanism, so that a lead-screw sliding-block mechanism is formed and used for converting up-down vibration of the building vibrating equipment into rotational movement. The first supporting spring, the second supporting spring and the torsional shock absorption mechanism have high integration and integrity, damping vibration absorption of up-down vibration of the building vibrating equipment is achieved through rotational vibration absorption of the torsional shock absorption mechanism, and the vibration absorption effect is greatly improved.

The invention provides a pulsator washing machine and a balance ring thereof; the pulsator washing machine comprises a rotary inner barrel, the balance ring is arranged at the top the inner barrel and is configured to balance eccentricity due to rotation of the inner barrel when the pulsator washing machine operates for dewatering by spin-drying, the balance ring comprises a shell defining a circular chamber for receiving a balance medium and at least one arc partition arranged in the circular chamber, the arc partitions are extended from the inner peripheral wall of the circular chamber to its outer peripheral wall along the arc shape, and each arc partition is provided with at least one liquid through hole. The balance ring of the invention enables the pulsator washing machine to vibrate at small amplitude in early stage of dewatering by spin-drying.

The invention discloses a signal acquisition device of a rotary electric arc sensor. The signal acquisition device uses the way of split type mounting way, and comprises an encoding disk and an encoder which is fixed on an encoder fixing cover by a screw, wherein a positioning portion protrudes from one side of the encoder facing the encoder fixing cover, the surface of the encoder fixing cover is cooperated with the positioning portion and a positioning groove is formed in a concave manner. The mounting precision of the encoder on the encoder fixing cover is high due to cooperation of the positioning portion and the positioning groove.

The invention provides a vibration-damping device for auxiliary engines of military aircrafts, which aims to solve the problem that if a military aircraft is provided with an auxiliary engine, a vibration-damping device and a supporting device need to be correspondingly provided. The main points of the invention are as follows: the vibration-damping device is composed of a cylindrical main body and a lifting lug, wherein the cylindrical main body, from inside to outside, is sequentially composed of an outer sleeve, a rubber sleeve, a webby circular ring and an inner sleeve, and the webby circular ring is embedded into the inner wall of the rubber sleeve and is hooped on the outer wall of the inner sleeve; and the lifting lug is in the shape of a circular ring, the inner hole of the circular ring is provided with a joint bearing, and the lifting lug is arranged on the outer wall of the outer sleeve. The vibration-damping device disclosed by the invention is used for setting a supporting mechanism for an auxiliary engine of a military aircraft, and can achieve effects of vibration damping, impact resistance, and the like.

The invention discloses a vibration reduction suspension structure, and aims to provide a multi-stage vibration reduction suspension structure which is rich in vibration reduction means, good in vibration reduction effect and durable. The multi-stage vibration reduction suspension structure comprises an upper support, a lower support, main spring rubber and a supporting arm which is used for connecting an engine assembly; the main spring rubber comprises a main spring inner framework used for fixing the supporting arm and two main spring bases arranged on the two sides of the main spring innerframework in a bilateral symmetry mode; a vulcanized middle framework is arranged in the middle of the main spring rubber; the vulcanized middle framework comprises two side plates arranged in a bilateral symmetry mode and a bottom plate located between the side plates; the side plates are embedded in the ends, close to the main spring inner framework, of the main spring bases; a columnar limiting rubber block is arranged below the bottom plate; first gaps exist between the main spring inner framework and the side plates; and a second gap exist between the limiting rubber block and the lowersupport. With the multi-stage vibration reduction suspension structure adopted, multi-stage vibration isolation can be achieved, the problem that the high-frequency dynamic stiffness of a pure rubbersuspension is too high is solved, and NVH performance is optimized.