238results about How to "Dissipate vibrational energy" patented technology

The invention discloses a combined vibration damper of a screw drill complete machine test-bed and a manufacturing method thereof. The combined vibration damper comprises a vibration attenuation base which comprises a loading system base, a first clamping system base and a second clamping system base, wherein the loading system base is arranged on an equipment foundation in a rigidity way; the first clamping system base and the second clamping system base are connected into a whole through a bolt and are arranged on the equipment foundation through a rubber vibration attenuation block; an interval of 30-50 mm is reserved between the loading system base and each clamping system base; the first clamping system base and the second clamping system base are respectively internally provided with a plurality of cubic cavities with an equal size; the volume of each cubic cavity is 0.1-0.2 cubic meter; discrete type balance weight sand is respectively filled into the cubic cavities, and the filling efficiency is 80-90 %; and the weight of the balance weight sand is 25-35 % of the total weight of the whole device. The test-bed is capable of restraining resonance and testing precisely in the testing process by the combined vibration damper, and the usage precision of surrounding working devices is not affected.

A piezoelectric actuated suspension with passive damping is disclosed for precision positioning of hard disk drive while reducing undesired shock vibrations. Along the longitudinal axis of an etched suspension, two piezoelectric actuators dispose near the base plate to provide a push-pull motion. The actuators have two main portions. The first portion is piezoelectric elements to provide active positioning. The second portion is viscoelastic damping layers underneath the piezoelectric elements for passive damping. The complementary parts such as stiff edge elements and optional soft boundary covers are used to enhance the actuating abilities of the actuators and prevent any contaminants of the viscoelastic layers from going into the clean sealed chamber of the hard disk drive, respectively. The present invention further relates to a dual-stage servo system in a hard disk drive for fine positioning of the read / write head and better shock resistance via the piezoelectric actuated suspension with passive damping.

A head for use with a toothbrush and method for forming the same, comprising an outer perimeter portion formed of a rigid material. The rigid material is adapted to allow the head to be sonically welded. The head also comprises a tuft field positioned within the outer perimeter portion. The tuft field is formed of a flexible elastomer. The tuft field defines one or more apertures to receive one or more bristle tufts. The head is sonically welded into place in the toothbrush.

The invention relates to a damping device comprising two centrifugal masses, which are supported on each other and can be rotated to a limited extent with respect to each other against the action of at least one energy accumulator accommodated in a radially outwardly disposed annular chamber, and comprising a centrifugal force pendulum which comprises several pendulum masses distributed over the circumference and is effectively associated with a centrifugal mass. According to the invention, the pendulum masses are pivotably supported to a limited extent radially inside, and within the axial installation space of the annual chamber radially outside, on a receiving profile, which is effectively connected to the centrifugal mass, by way of rolling bodies.

A sound barrier membrane comprises of a decoupling layer, a barrier layer and a dampening layer. The membrane also provides crack isolation, and acts as a vapor barrier. Numerous materials are disclosed which can be used to create these layers. Methods for assembly of the sound barrier membrane are also disclosed.

The invention provides a compressor shock absorption system and an air conditioner provided with the same. The compressor shock absorption system comprises at least one set of shock absorption device. The shock absorption device comprises a shock absorption floor mat, wherein one end of the shock absorption floor mat is connected with a compressor. The end, backing onto the compressor, of the shock absorption floor mat is provided with a damping shock absorption assembly through a connecting piece. The damping shock absorption assembly is fixed to an installing piece. According to the compressor shock absorption system, double-level shock absorption is adopted, the floor mat is adopted by the first-level shock absorption system body, damping shock absorption is adopted by the second-level shock absorption system body, and shock energy transferred by a footing tray can be damped in the operation process of the compressor, so that the shock energy of the compressor is damped effectively. The air conditioner is provided with the compressor shock absorption system, so that it is guaranteed that noise and shock of the whole air conditioner are obviously lowered in the operation process of the air conditioner, and the user experience is better.

A damping element for a wind turbine rotor blade is provided, the damping element comprising a laminate material made of at least one viscoelastic layer and at least one stiff layer adhered to said viscoelastic layer, wherein the damping element is adapted to be attached to a body of the rotor blade so that the at least one viscoelastic layer is in contact with the body of the rotor blade.

A vibration dampening device for use on compound archery bows. A device may be associated with one or more bow limb, with each device disposing a vibration damping bumper in position to shorten the vibrating length of the bow string at brace, compared to the vibrating length of a bow string of a comparable bow lacking the device(s). Certain embodiments couple bowstring vibration at brace with one or more cable. Preferred embodiments include a limb anchor adapted to distribute string-induced loading onto a bow limb at both sides of a string cam.

The suspension arrangement for the clothes washing machine is defined by a plurality of suspension rods, each comprising a slim and flexible stem having an upper end coupled to a structural cabinet and a lower end coupled to a tank to be suspended inside the structural cabinet. The arrangement also provides for a plurality of radial rods, having an inner end coupled to a median side region of the tank, and an outer end coupled to a facing median region of a respective suspension rod so as to transmit to each respective suspension rod at least part of the radial displacement of the tank during machine operation, so as to cause a corresponding elastic deformation, by flexion, on the respective suspension rod.

The invention relates to a satellite attitude maneuver control method, in particular to a flexible agile satellite attitude maneuver rolling optimization control method. The flexible agile satellite attitude maneuver rolling optimization control method resolves the problems that when rapid maneuver of an existing flexible satellite attitude is carried out, nonlinearity is strong, various constraints are provided, and a flexible accessory vibrates easily, and then the control requirement can not be met easily. A nonlinearity state space equation comprising satellite attitude dynamics, kinematics and vibration of the flexible accessory is built and used for carrying out accurate prediction of future information of the satellite attitude. A weighing optimization index for achieving rapid maneuver of the satellite attitude and restraining vibration of the flexible accessory is built, design of an expectation control law is carried out through a nonlinearity model prediction control method, the planned expectation moment is shaped based on the input shaping technology, the manipulation law of a CMG group is designed through a robust pseudo-inverse method, the expectation control moment obtained after input shaping serves as input, a frame angular speed of each CMG is planned, and large-angle rapid maneuver control over the satellite attitude restraining vibration of the flexible accessory is achieved.

The invention discloses an automatic horizontal adjusting device and adjusting method for platform. The automatic horizontal adjusting device for the platform comprises a bedplate, wherein an air spring is mounted under each corner of the bedplate, the air springs are connected with the upper ends of lifting mechanisms mounted in support legs, the lower ends of the lifting mechanisms are connected with transmission devices, a base is arranged under the support legs, a support seat A is mounted in the middle position under the bedplate, adjusting gas valves are also fixedly mounted under the bedplate, the adjusting gas valves are connected with the air springs through gas pipes, one end of a swing rod is provided with a spherical head A and is fixed by a clamp sleeve sleeved on the exterior of the support seat A, the other end of the swing rod is provided with a plumb bob, a suspension arm is mounted on the rod body of the swing rod, the end head of the suspension arm is correspondingly positioned under contact points of the adjusting gas valves, a locking plate is fixedly arranged on the base, and a movable magnet block inside the plumb bob controls the locking through a remote control switch. The invention also provides the horizontal adjusting method for the platform, and the horizontal adjusting device and the adjusting method have the characteristics that the horizontal adjusting time is short, the horizontal adjusting accuracy is high, the reliability is high and the like.

Embodiments of the present invention are directed to a compact and lightweight, automated latching device which includes a passive catch configured to be engaged with a motor-powered latch to form a mechanical connection between two structure in a precise and repeatable manner. An active damping mechanism is used to dissipate any vibrational energy that may be present in the latched structure. The apparatus may be used to precisely orient and attach a deployable element, usually of a space vehicle, to the main body of the vehicle. In one embodiment, a latching apparatus comprises a catch having a catch body and a probe connected to the catch body. A latch has a main housing and a grip mechanism movable relative to the main housing. The grip mechanism is configured to grip the probe and to be actuatable to pull the probe toward the latch. A damping member is coupled with the main housing of the latch, and is movable relative to the main housing of the latch toward the catch. The damping member is actuatable to exert a damping force against the catch body of the catch.

The invention relates to a particles-impact damper with an elastic support. The inner part of the particles-impact damper is provided with an elastic energy-storage component and a plastic impact energy-dissipation component. The invention is characterized in that the particles-impact damper is connected with a controlled main system through the elastic support and the natural vibration frequency of the particles-impact damper is not greater than that of the controlled main system. The elastic support can be a spiral spring, a plate spring or an elastic cushion; and free movement direction of the elastic support is identical to the vibration direction of the controlled main system. The particles-impact damper can effectively reduce acceleration in impact process and decrease impact on the controlled main system so as to consume vibration energy of the controlled main system to the maximum extent, reduce the energy retransmission to the controlled main system and alleviate the impact of ultraharmonics and subharmonic. The particles-impact damper can be applied to the vibration control of nonlinear systems with low frequency and dense modes.

The invention discloses an energy recovery braking system for an automobile suspension, which is arranged between the automobile suspension and a pneumatic braking system. The invention adopts the following technical scheme that the system comprises an energy accumulator, an energy recovery cylinder, an energy recovery cylinder II and an energy recovery control module, wherein one end of the energy recovery cylinder is connected with the suspension, the other end of the energy recovery cylinder is connected with the energy accumulator, and the other end of the energy accumulator is connected with an air reservoir of the pneumatic braking system; the cylinder body of the energy recovery cylinder is fixedly arranged on an axle, a piston rod end is arranged on the automobile suspension, and a non-return valve is arranged between the energy recovery cylinder and the energy accumulator; the energy recovery control module is connected with the air reservoir; and the cylinder body of the energy recovery cylinder II is fixedly arranged on the axle, the piston rod end is connected with the automobile suspension through a stroke lever, and a non-return valve is arranged between the energy recovery cylinder II and the energy accumulator. The new design is not only an energy saving design of energy feedback but also provides a certain damping characteristic for the original leaf spring suspension system, thereby being favorable for attenuating the vibration energy and improving the running smoothness of automobiles.

The invention relates to a pneumatic spring vibration isolator of an air flotation type forward and backward swing concatenation mechanism based on a ball head connecting rod, which belongs to the ultra-precise measurement and processing field. An inner cylinder is assembled in an outer cylinder of the vibration isolator, an air bag for an air spring is sleeved outside the upper end of the inner cylinder, a support rod is arranged in the chamber of the inner cylinder after penetrating through an annular cover plate, and the upper end and the lower end of a diagonal cable wire are respectively fixed with the annular cover plate and the support rod to form a single swing mechanism; an upper ball seat and a lower ball seat are respectively arranged on the lower end of the support rod and the upper end surface of the air spring, and the upper end and the lower end of the ball head connecting rod are respectively arranged in the upper ball seat and the lower ball seat to form a reversed swing mechanism; and the single swing mechanism and the reversed swing mechanism form the forward and backward swing concatenation mechanism. The air spring is used as a reversed swing spring, and the rigidity of the reversed swing spring can be changed by continuously adjusting the internal pressure of the air spring, thereby the real time adjustment of the rigidity of the forward and backward swing concatenation mechanism can be realized to meet requirements of different operating conditions. The pneumatic spring vibration isolator is introduced by the forward and backward swing concatenation mechanism, which not only enhances the comprehensive vibration isolation performance of the isolator, but also overcomes many disadvantages of other types of isolators.

A paper feeder is capable of minimizing abnormal noise produced at a separation pad during paper feed, without reducing the paper feed capability, for use in an image forming apparatus using the same. Buffers are mounted on the separation pad. This arrangement ensures that, when a stick-slip condition occurs between the paper and separation pad during paper feed, and the separation pad is vibrated by the paper, the buffer vibrates so as to dissipate the vibration energy of the separation pad, with the result that the vibration of the separation pad is minimized, thereby to reduce any abnormal noise.

The invention relates to a damping spring vibration-proof hammer preventing lead vibration and galloping in a power transmission line. The hammer is characterized in that: the hammer comprises a damping spring vibration damper and a wire clamp; the damping spring vibration damper comprises a cylindrical shell which is provided with a piston rod; an upper end and a lower end of the piston rod are installed with locating plates; springs and damping rubber sleeves are provided between the locating plates; the damping rubber sleeves are sleeved on the springs; In the wire clamp, a wire clamp main body is hinged to an upper end of wire clamp gland; the wire clamp main body and an lower end of the wire clamp gland are fixedly connected with the upper end of the piston rod of the damping spring vibration damper; an inside bottom of the cylindrical shell is provided with a counterweight plate; and a antiskid rubber gasket for clamping a lead is provided between the wire clamp main body and the wire clamp gland of the wire clamp. The damping spring vibration-proof hammer in the invention has the advantages of reasonable composition, good effect of power transmission line lead vibration damping and galloping proof, low cost, convenient installation and replacement, safe and reliable use, long work life, strong adaptability of working environment and the like.

The invention discloses a rear axle mass shock absorber and relates to a shock absorber. The rear axle mass shock absorber comprises a screw, mass inertia blocks, vibration absorption rubber and a mounting bracket. The mounting bracket is formed by a bottom plate and a vertical plate; the vertical plate is provided with a limiting hole; the mass inertia blocks are respectively arranged on both sides of the vertical plate; each mass inertia block is provided with a center round hole; the mass inertia blocks are connected with the vertical plate by the vibration absorption rubber in a vulcanizing manner; the screw is sleeved by a gasket, a nut and a buffer rubber sleeve; the screw passes through the center round holes of the mass inertia blocks, the vibration absorption rubber and the limiting hole of the vertical plate and enables the buffer rubber sleeve to be positioned in the limiting hole of the vertical plate; the two mass inertia blocks, the two pieces of vibration absorption rubber and the vertical plate are locked together by the gasket and the nut, so that lateral compression or stretching deformation of the vibration absorption rubber can be regulated. According to the rear axle mass shock absorber, vibration noise can be reduced; after the rubber is vulcanized and formed, rigidity can be freely regulated; safety performance is good; NVH (Noise Vibration and Harshness) performance of a vehicle can be improved; the development period of the vehicle or the shock absorber product is shortened; the rear axle mass shock absorber is easy to popularize and apply.

The invention provides a novel high-precision hybrid vibration isolation device. The novel high-precision hybrid vibration isolation device comprises an assembly plate, an intermediate separation plate, a bottom plate, an air spring and magnetorheological dampers, wherein the assembly plate and the intermediate separation plate are connected through the magnetorheological dampers; the intermediate separation plate is fixedly connected with the air spring through bolts; and the bottom plate is fixedly connected with the air spring. The magnetorheological dampers are used for isolating low-frequency vibration signals coming from the ground; and since practical ground signal sources can be transferred along multi-dimensional directions, the four magnetorheological dampers have vibration isolation capability of six DOF (Degree of Freedom) directions. The air spring and the magnetorheological dampers are reasonably connected with the intermediate separation plate, so that high-precision active and passive hybrid vibration isolation capability can be realized. According to the novel high-precision hybrid vibration isolation device disclosed by the invention, a stackable structure is adopted, so that the structure is compact; the vibration isolation capability of multi-DOF can be realized, so that the novel high-precision hybrid vibration isolation device has the advantages of high practicability, high reliability and the like; and an advanced vibration isolation means is provided for a high-precision equipment platform.

The invention relates to a damping device for a turbomachine stator. The turbomachine stator forming a stator vane ring or upstream guide vane element comprising a plurality of vanes placed radially between a first inner ring and a second outer ring, the two rings being concentric, the second ring having a cylindrical outer surface portion. The stator is characterized in that, on said outer surface portion, at least one vibration-damping laminate is attached, the laminate comprising at least one layer of viscoelastic material in contact with said surface portion and one counterlayer of rigid material.

A bearing for a turbomachine variable pitch stator vane pivot mounted in a bore of the turbomachine casing is disclosed. The bearing includes an inner bushing secured to the pivot and an outer bushing secured to the bore. An elastomeric material is inserted between the inner bushing and the outer bushing to allow the vane to pivot about its axis and absorb at least some of the flexing of the pivot at right angles to the axis. The design makes it possible to reduce bearing bushing wear.

A sound barrier membrane comprises of a decoupling layer, a barrier layer and a dampening layer. The membrane also provides crack isolation, and acts as a vapor barrier. Numerous materials are disclosed which can be used to create these layers. Methods for assembly of the sound barrier membrane are also disclosed.

The invention provides a rubber power vibration absorber and relates to a power vibration absorber. The rubber power vibration absorber comprises a mounting bracket, a mass inertia block, an upper pressing plate, vibration absorbing rubber and a vibration bracket, wherein the mass inertia block is positioned in the mounting bracket; the top end of the vibration bracket exposes out of the top of the mounting bracket; the bottom end of the vibration bracket penetrates into the top of the mounting bracket and is fixedly connected in the mass inertia block; the upper pressing plate is positioned above the top end of the vibration bracket; the upper pressing plate, the mounting bracket and the vibration bracket are connected into a whole through the vibration absorbing rubber in a thermally-vulcanized manner; the top of the mounting bracket and the upper pressing plate are connected with each other on the periphery of the vibration absorbing rubber through adjusting a fastening part so as to freely adjust the compression or tensile deformation quantity of the vibration absorbing rubber in the vertical direction. According to the rubber power vibration absorber, the vibration noise can be reduced, and not only can the free stiffness adjustment be performed after rubber vulcanization forming and in the using and debugging processes, but also the falling-off or the flying-out by hitting when the mass inertia block is in use can be prevented. The rubber power vibration absorber has the advantages of being long in service life, high in safety performance, high in qualified rate and easy to popularize and apply.

The invention discloses an active and passive integrated four-feet converged type vibration isolator which comprises an upper connection plate (1), inclined micro-vibration control units (2), a thirdslotted disk spring (4), a lower connection plate (5) and a slotted cylindrical spring (6); one end of the slotted cylindrical spring (6) is connected with the third slotted disk spring (4); the otherend of the slotted cylindrical spring (6) is fixed to the middle part of the lower connection plate (5); the third slotted disk spring (4) is fixed to the middle part of the upper connection plate (1); the inclined micro-vibration control units (2) are uniformly distributed around a center shaft of the slotted cylindrical spring (6) in the circumferential direction of the upper connection plate (1), and are obliquely mounted; one ends of the inclined micro-vibration control units (2) are connected with the upper connection plate (1); and the other ends of the inclined micro-vibration controlunits (2) are connected with the lower connection plate (5). With the adoption of an active and passive integrated structure, wide frequency band micro-vibration control can be realized, the vibrationisolation efficiency of the vibration isolator and the adaptability of the vibration isolator to a complex environment and a changing object are improved.

The invention relates to rail accessories, in particular to a rail fixing device with the function of vertical guidance. The rail fixing device comprises a base disposed on a sleeper. The base is fixedly connected with the sleeper through anchor bolts. The rail fixing device is characterized by further comprising a guide component and a vertical support element. The guide component comprises a guide element and a guide support located on two sides of a rail web of a steel rail. The transverse stiffness of the guide element is at least 120KN / mm. The guide element is tightly contacted with the steel rail at least from the top and bottom of the rail web of the steel rail and transversely limits the steel rail. The guide element is clamped by the guide support. Slide contact surfaces are arranged between the guide element and the guide support and are parallel to the vertical direction of the steel rail, and the guide element and the guide support can slide relative to each other along the vertical direction of the steel rail. The vertical support element is located below the steel rail and has elastic supporting capacity at least in the vertical direction of the steel rail. The guide component on two sides of the rail web is used for guiding, the vertical support element below the steel rail is used for supporting and power consuming, and accordingly stressing stability of the steel rail is improved effectively and the safety is better.

A head for use with a toothbrush and method for forming the same, comprising an outer perimeter portion formed of a rigid material. The rigid material is adapted to allow the head to be sonically welded. The head also comprises a tuft field positioned within the outer perimeter portion. The tuft field is formed of a flexible elastomer. The tuft field defines one or more apertures to receive one or more bristle tufts. The head is sonically welded into place in the toothbrush.

The invention discloses a vibration control device and a vibration control method for slings of a suspension bridge. The vibration control device is arranged between the two abreast slings; one end of each sling is fixedly arranged on a main beam through a moving hinge; dampers are sequentially arranged along each sling; two ends of each damper are fixed with the corresponding sling through a sling clamp respectively. The vibration control method comprises the following steps: firstly, adjusting the frequency of one of the two abreast slings to achieve that the two slings are different in frequency; secondly, arranging a plurality of dampers between the two slings; finally, optimizing the mounting position of each damper according to the vibration mode control requirements of the slings. According to the device and the method, in-phase vibration generated by the double abreast slings is eliminated, and inverse phase vibration is restrained.

Provided is a rotor system including: a rotating shaft structure including a shaft and a thrust disc formed in a radial direction of the shaft; at least one journal air bearing including a journal bearing support which is made of a rigid body to support a load applied to the shaft by air, a journal spring which encloses an outer surrounding surface of the journal bearing support to provide a elastic support force to the journal bearing support, and a journal damper which encloses the outer surrounding surface of the journal bearing support to dissipate energy from vibration applied to the journal bearing support; and at least one thrust air bearing including a thrust bearing support which is made of a rigid body to support a load applied to the thrust disc by air, a thrust spring which is positioned on one surface of the thrust bearing support to provide a elastic support force to the thrust bearing support, and a thrust damper which is positioned on one surface of the thrust bearing support to dissipate energy from vibration applied to the thrust bearing support.

The invention provides a spherical surface TMD (Turning Mass Damper) shock absorption control device, which comprises a bottom plate component and a mass block component glidingly matched with the bottom plate component, wherein the weight of the mass block component is m; the top of the bottom plate component is provided with N concave spherical surfaces; the bottom of the mass block component is provided with N convex spherical surfaces glidingly matched with the concave spherical surfaces; the concave spherical surfaces and the convex spherical surfaces have the identical spherical surface radius R; a sliding friction pair is arranged between the convex spherical surfaces and the concave spherical surfaces; and a damping device is arranged between the mass block component and the bottom plate component. The spherical surface TMD shock absorption control device has the advantages that the additional damping can be increased through setting different friction factors; meanwhile, through a single pendulum simple harmonic moving principle, an elastic element of a traditional TMD is replaced; the design is scientific; the structure is compact; the operation and the use are convenient; the problems that for the existing TMD technology, the manufacturing cost is high, a greater installation space is needed, a structural element can be easily damaged, and the like can be solved; and the spherical surface TMD shock absorption control device is particularly applicable to the control of low-frequency vibration of a structure.