304 results about "Longitudinal vibration" patented technology

The invention discloses an anti-jamming coal mining drilling machine with drilling and multidirectional impacting functions and a using method thereof.The anti-jamming coal mining drilling machine comprises a drilling machine body, a high-pressure driving mechanism is arranged on the drilling machine body through a multidirectional guide rail mechanism, and a drilling assembly is connected with the high-pressure driving mechanism; when the drilling machine works, the high-pressure driving mechanism drives the drill rod and the drill bit to conduct rotary drilling, the high-frequency transverse vibration mechanism synchronously generates transverse high-frequency vibration, the high-pressure driving mechanism drives the drill rod and the drill bit to conduct rotary drilling, and the high-frequency transverse vibration mechanism drives the drill rod and the drill bit to conduct rotary drilling. The friction force between the drill bit and rock is reduced, debris accumulation is prevented, efficient deslagging is achieved, when hard rock or drill jamming occurs, the longitudinal vibration impact mechanism triggers longitudinal vibration, impact and drill jamming prevention functions are achieved through cooperative work of transverse vibration and longitudinal vibration, the drill jamming problem under the complex geological condition is effectively solved, the drilling efficiency and equipment reliability are improved, and the drilling cost is reduced. The device is suitable for drilling operation of mining roofs and baseplates, sides and the like.

The invention relates to an ultrasonic transducer capable of realizing a high torsional vibration-longitudinal vibration amplitude ratio and a design method thereof. The ultrasonic transducer comprises a piezoelectric ceramic vibrator 3, an amplitude-change pole 2 and a tool head 1 which are connected in sequence, the shape of the amplitude-change pole is formed by rotating a specific geometric curve around the axis. The interior of the amplitude-change pole is of a cavity structure 5, the wall thickness distribution of the amplitude-change pole is adjustable, the cavity structure is a through hole or a blind hole, and the shape of the cavity structure is an equal-diameter cavity extending along the axis or a special-shaped cavity formed by rotating a specific geometric curve around the axis. By optimizing the internal cavity structure and the wall thickness distribution and adjusting the amplitude proportion between torsional vibration and longitudinal vibration, the longitudinal vibration of the transducer can be converted into longitudinal torsional vibration, so that the transducer has both longitudinal vibration and torsional vibration. Due to the unique cavity type structure in the amplitude-change pole, the amplitude ratio of generated torsional vibration to longitudinal vibration can be larger, the ultrasonic effect with the high torsional vibration-longitudinal vibration amplitude ratio can be generated, and vibration output with the high torsional vibration-longitudinal vibration amplitude ratio can be achieved.

The invention belongs to the technical field of mechanical transmission, and discloses a conductor ring and magnetic resistance array composite permanent magnet thrust bearing and a damping force calculation method. The conductor ring and magnetic resistance array combined type permanent magnet thrust bearing realizes the bearing of non-contact magnetic thrust through the combination of the eddy current ring and the magnetic group array. When thrust from a propeller at the stern end of a propulsion shafting acts, the rotor magnetic group array axially moves, axial traction force is generated between the rotor magnetic group array and the stator magnetic resistance array to counteract the thrust action from the axial direction, meanwhile, the magnetic group array cuts the vortex ring, induction damping is generated on the surface of the vortex ring, damping force is formed, and the vortex ring is driven to rotate. And therefore, the longitudinal vibration during transmission of the propulsion shafting is reduced, and the propulsion shafting system is more silent and stable during operation. In addition, the damping force calculation method does not need complex three-dimensional structure modeling and grid division, is simple in solution, high in universality and short in calculation time consumption, and has high engineering application practical value.

The embodiment of the utility model belongs to the technical field of track locking mechanisms, and relates to a track locking mechanism and a conveying device, and the track locking mechanism comprises a base, a track supporting seat and a fastening assembly. The base comprises a bottom plate and at least two side plates, the two side plates are oppositely arranged at the two ends of the bottom plate, and a mounting groove is defined by the two side plates and the bottom plate; the track supporting seat is located in the mounting groove and provided with an inclined plane, and an included angle A is formed between the inclined plane and the bottom of the mounting groove; the fastening assembly is arranged on the base in a penetrating mode, and the fastening assembly and the side plates of the installation groove can jointly achieve transverse clamping and longitudinal clamping on the inclined face so as to fix the rail supporting base. When the fastening assembly abuts against the inclined face, force exerted on the inclined face by the fastening assembly is converted into longitudinal force and transverse force. The rail supporting seat is longitudinally clamped by the fastening assembly and the bottom plate and transversely clamped by the fastening assembly and the side plate at the same time, transverse and longitudinal vibration can be resisted, the stability of the rail locking mechanism is maintained, meanwhile, the rail supporting seat does not need to be fixed through a complex device, and the production cost is reduced.

The invention relates to an ultrasonic-assisted longitudinal-torsional compound vibration two-roller rolling device, and belongs to the technical field of ultra-thin strip rolling. According to the device, the ultrasonic longitudinal-torsional vibration device is combined with the rolling mill, so that the deformation resistance of materials is effectively reduced, the surface roughness is improved, grains are refined, and the residual stress is reduced by utilizing ultrasonic vibration. The device comprises a rolling mill rack, an ultrasonic longitudinal-torsional vibration device, a winding device, a winding assisting device and an unwinding device. The ultrasonic longitudinal-torsional vibration device is composed of a variable-amplitude roller shaft, a connecting shaft, piezoelectric ceramics, a copper electrode, a rear cover plate and a hexagon socket screw, and has a single-excitation form and a double-excitation form. The single excitation device adopts a quarter-wavelength conical amplitude-change pole, a spiral groove is formed in the conical surface of the quarter-wavelength conical amplitude-change pole, and longitudinal vibration can be partially converted into torsional vibration; according to the double-excitation device, the torsional vibration amplitude is increased through cooperation of two longitudinal-torsional amplitude-change poles which are symmetrically arranged. The device is compact in structure, small in energy loss, high in machining precision and suitable for production of high-precision ultra-thin strips.

The invention relates to a vibration control design method for a ship low-speed motor direct propulsion long shafting, and the method comprises the steps: determining the position of a low-speed motor output flange and the central position of a propeller, determining the positions of a thrust bearing, an intermediate bearing, a tail pipe bearing and the like, arranging the span of the bearings, arranging the number of the bearings, and calculating the shafting strength. Torsional vibration calculation of the long shaft system of the low-speed motor, torsional vibration calculation result analysis, centering calculation of the long shaft system of the low-speed motor, cyclotron vibration calculation of the long shaft system of the low-speed motor, longitudinal vibration calculation of the long shaft system of the low-speed motor, fatigue analysis of a thrust bearing, verification of whether the thrust bearing meets the load requirement or not, shaft system jacking verification, and the like. And finally verifying the shafting vibration control design effect through a navigation test. Different from conventional diesel engine propulsion and high-speed motor propulsion shafting design, the method starts from the characteristics of a low-speed motor direct propulsion shafting, and analysis is carried out through shafting strength design, torsional vibration, centering, rotation, longitudinal vibration, installation and other systems, so that the risks of shafting load imbalance and abnormal vibration are avoided.

The invention discloses a longitudinal bending composite type six-degree-of-freedom piezoelectric active vibration isolation platform and a working method thereof. The vibration isolation platform adopts a modular structural design, a vibration isolation connecting platform and a base platform are sequentially arranged from top to bottom and are connected through four uniformly distributed vibration isolation modules, and each vibration isolation module forms a multi-stage vibration transmission structure through a fixed base, a transducer base, a piezoelectric transducer, an amplitude-change pole, a pre-tightening bolt and a small flexible hinge. The control module collects feedback signals of a first acceleration sensor arranged on the vibration isolation connecting platform and feedforward signals of a second acceleration sensor arranged on the base platform, and outputs 12-channel control signals to the piezoelectric transducers of the vibration isolation modules after signal processing. The piezoelectric transducer is driven to generate a composite motion mode of longitudinal vibration and multidirectional bending vibration, and active suppression of longitudinal vibration and radial bending vibration in any direction of a vibration isolation object is achieved. The device has the advantages of multi-degree-of-freedom vibration isolation, compact structure, lightweight design, independent control, high stability and the like, and has important application value in the fields of space reflecting mirrors, micro-nano manufacturing equipment vibration control and multi-degree-of-freedom vibration isolation systems.

The invention belongs to the technical field of buildings, and particularly relates to an anti-seismic and shock-absorbing structure for a beam type bridge, which comprises a main beam and a bridge body, the bottom of the bridge body is fixedly connected with a first fixing plate; a plurality of groups of first fixing plates are arranged at the bottom of the bridge body; the bottom of the first fixing plate is fixedly connected with a damper. A plurality of groups of dampers are arranged at the bottom of the first fixing plate and are uniformly distributed at the bottom of the first fixing plate; the ends, away from the first fixing plate, of the dampers are jointly and fixedly connected with a second fixing plate. According to the step, through arrangement of a first fixing plate, a damper, a second fixing plate, balls, damping springs and a baffle, longitudinal vibration is weakened by the damper, transverse vibration is weakened by the damping springs, and the second fixing plate moves on the top of the main beam through the balls, so that the situation that the damper is twisted and damaged when transverse vibration is transmitted is reduced; the stability of the device during shock resistance and shock absorption is improved, and the service life of parts is prolonged.

The utility model provides a small medical ultrasonic amplitude transformer. The small medical ultrasonic amplitude transformer comprises a base cylinder, a nose cylinder and a cutter bar cylinder. The base cylinder is provided with an internal thread and is used for being detachably connected with a transducer or other external components. The nose portion cylinder axially extends from the front end of the base portion cylinder, two symmetrical and parallel flat portions are arranged on the circumferential face of the nose portion cylinder, and the flat portions are used for being matched with the whole transducer to be installed, so that accurate positioning of the direction of the tool bit is guaranteed, and pre-tightening and fixing during assembly are facilitated. The cutter bar cylinder extends from the front end of the nose cylinder, the front portion of the cutter bar cylinder is of an arc-shaped structure, the vibration mode of the cutter head can be adjusted, bending vibration is overlaid on the basis of longitudinal vibration, and a longer effective cutting line is formed. The cutting edge limited by the multiple cutting faces is arranged on the arc-shaped front portion of the cylindrical cutter bar, the edge width and the cutting area of the cutting edge are larger, and better blood coagulation and sealing effects can be achieved. The cutting face where the cutting edge is located is perpendicular to the extending plane of the flat part so that the vibration direction of the arc-shaped front part can be accurately controlled.

A compact vibratory burrowing probe, particularly beneficial in low gravity space exploration environments, uses lateral or stirring-like vibrations to fluidize a surrounding regolith, thereby decreasing the penetration resistance, and compensating for the light overhead weight to improve the burrowing action of the probe into the surface of the terrain of explored moons, planets, or asteroids. Included is a novel vibratory mechanism capable of imparting the novel lateral or stirring vibration, as well as a more conventionally oriented longitudinal vibration.

The invention relates to the technical field of insulator fault early warning, in particular to an insulator mechanical pulse electrification early warning system. The system comprises a pulse signal acquisition module which is used for setting sampling points at equal intervals at each height of an insulator and acquiring vibration pulse signals of the sampling points; the vibration abnormity identification module is used for determining the transverse vibration abnormity degree and the longitudinal vibration abnormity degree of the vibration pulse signal of each sampling point; the pulse signal denoising early warning module is used for acquiring a standard comprehensive abnormal index of the vibration pulse signal of each sampling point; identifying the non-low-frequency energy intensity of the vibration pulse signal of each sampling point, and adjusting a fixed threshold value in a wavelet denoising algorithm in combination with the standard comprehensive abnormal index so as to perform defect early warning on the insulator by using the denoised vibration pulse signal; according to the invention, the accuracy of defect early warning of the insulator is improved.

The utility model discloses a multi-dimensional vibration manufacturing test device which comprises a vibration plate, the lower end face of the vibration plate is fixedly connected with a fixing frame, the upper end face of the fixing frame is fixedly connected with a vibration motor, the upper end face of the vibration plate is slidably connected with a second sliding plate, the upper end face of the second sliding plate is slidably connected with a first sliding plate, and the upper end face of the first sliding plate is fixedly connected with a positioning block. The upper end face of the positioning block is fixedly connected with a driving motor, the output end of the driving motor is connected with a rotating shaft, the outer wall of the rotating shaft is fixedly connected with a cam, the whole vibration plate vibrates through operation of the vibration motor, and vibration testing of products on the mounting plate is achieved; the cam is in contact with the movable block in the rotating process and abuts against the movable block to move up and down in a reciprocating mode, the first sliding plate drives the mounting plate to conduct transverse vibration testing, the second sliding plate drives the mounting plate to conduct longitudinal vibration testing, multi-dimensional vibration of the vibration testing device is effectively achieved, and the using flexibility of the device is improved.

The invention discloses an industrial camera anti-vibration device, and relates to the technical field of industrial camera stabilization, the industrial camera anti-vibration device comprises a mounting frame, the top of the mounting frame is provided with a first anti-vibration mechanism used for horizontal and transverse cushioning, and the bottom of the first anti-vibration mechanism is provided with a second anti-vibration mechanism used for horizontal and longitudinal cushioning; the bottom of the second shockproof mechanism is provided with a third shockproof mechanism for cushioning in the vertical direction, the lower end of the third shockproof mechanism is provided with a fixing mechanism, and the top of the fixing mechanism is provided with a buffer gasket for flexible cushioning and fixing. According to the industrial camera, the vibration in the three directions can be buffered through the first anti-vibration mechanism, then the horizontal and longitudinal vibration is buffered through the second anti-vibration mechanism, and finally the vibration in the vertical direction is buffered through the third anti-vibration mechanism, so that the vibration in the three directions can be buffered, and the vertical height of the industrial camera is flexibly adjusted through the cooperation of the fixing plate and the adjusting plate.

A system and method for actively suppressing aircraft wheel brake vibrations determines whether the wheel speed has changed suddenly, thereby preventing landing gear yaw vibrations and cornering difficulties caused by asymmetric brake pressure due to sudden wheel speed changes. By segmenting the aircraft's low-speed taxiing speed and limiting brake pressure based on the speed of each segment, longitudinal vibrations at low speeds are avoided, reducing the probability of vibration at low speeds by 1E-4. During high-speed braking, a wheel deceleration rate control range is established based on the braking torque characteristics, and brake pressure is controlled to achieve constant torque control, avoiding brake vibrations caused by torque variations during high-speed braking due to anti-skid operation. Longitudinal and yaw acceleration sensors are added to the wheel brake system. Braking pressure is limited based on the yaw and longitudinal vibration frequency signals, ensuring that no brake-induced vibrations occur during the entire braking process.

The invention provides an ultrasonic compound vibration device which is formed by connecting a plurality of vibration elements and can improve the stability of the connection state. The first vibration element (11) and the intermediate vibration element (10) are coaxially connected at one specified connection site at the midsection of the ultrasonic compound vibration device (1), the specified connection site is included in a range of a phase angle of 0.05 [pi] or less with respect to an antinode A (M1) of a standing wave (M1) of the longitudinal vibration and a range of a phase angle of 0.22 [pi] or less with respect to a node N (M2) of a standing wave (M2) of the torsional vibration. Similarly, the intermediate vibration element (10) and the second vibration element (12) are coaxially connected by a mechanical connection mechanism at the other designated connection part.

The invention relates to the technical field of acoustic driving, in particular to a passive ultrasonic resonance driving device. The device comprises a resonant cavity body, a standing wave focusing assembly, a spiral torque assembly and a friction gradient assembly are sequentially arranged in an inner cavity of the resonant cavity body, and the standing wave focusing assembly is used for focusing external incident ultrasonic waves to form standing wave nodes, generating vertical acoustic radiation force and driving a floating ball in the inner cavity of the standing wave focusing assembly to move in the axial direction. The spiral torque assembly is located below the standing wave focusing assembly, and a spiral groove of the spiral torque assembly converts longitudinal vibration into rotating torque. Through 20-100kHz broadband ultrasonic adjustment, the functions of lifting of the standing wave focusing assembly, rotation of the spiral torque assembly and sliding of the friction gradient assembly are activated in sequence, the function singleness of a traditional passive acoustic device (such as acoustic tweezers capable of only suspending) is broken through, a floating ball is driven to ascend and descend at 20kHz, cell interlayer positioning is completed, and the operation is simple and convenient. The 60 kHz trigger push teeth and the straight tooth grooves are in contact meshing through acoustic radiation force, so that the rotating shaft rotates, and the micro cutting tool bit is controlled.

The invention discloses a sandwich type piezoelectric driving double-shaft output mobile robot and a working method thereof.The sandwich type piezoelectric driving double-shaft output mobile robot comprises a sandwich type piezoelectric transducer, a pre-pressure applying mechanism, a driving wheel unit, a first output shaft, a second output shaft, a base body frame and a connecting plate, and a clamping mechanism is not arranged on a stator base body of the sandwich type piezoelectric transducer; a single pin of the pre-pressure applying mechanism and a through hole in the middle of a stator node beam are used for restraining, automatic rolling transmission of contact force is achieved under the condition of matching of the pin hole, and pre-pressure transmitted by the pre-pressure applying mechanism achieves force balance under the counter-acting force generated when a first driving foot and a second driving foot of the sandwich type piezoelectric transducer make contact with the curved surface of an output shaft. The elliptical motion trail direction of the stator driving foot can be controlled by controlling the electric signal phase difference of the longitudinal vibration piezoelectric ceramic set and the bending vibration piezoelectric ceramic set, forward and reverse motion of the first output shaft and the second output shaft is achieved through friction contact, and the mobile robot achieves forward, backward and rapid locking motion.

The invention relates to the field of ultrasonic near-field suspension, in particular to a standing-wave ratio adjusting method suitable for annular vibration flat plate traveling waves, and the method comprises the steps: determining the mechanical resonant frequency in a longitudinal vibration mode required by an ultrasonic suspension transmission device; respectively applying two paths of excitation signals with the same mechanical resonant frequency to the transducer 1 # and the transducer 2 #; analyzing the vibration displacement A of each point on the annular vibration flat plate, and calculating the change condition of the vibration displacement A of each point on the annular vibration flat plate along with theta and time t when the mounting angles of the transducer 1 # and the transducer 2 # are theta, so as to obtain the theta value in a pure traveling wave state under a constant condition; and changing the phase difference theta of the two paths of excitation signals, obtaining the phase difference theta of the excitation signals when the amplitudes of all points on the annular vibration flat plate are equal, solving the actual installation angles of the current transducer 1 # and the transducer 2 # according to the mathematical relationship of the theta sum, adjusting the phase difference theta of the two paths of excitation signals, and obtaining the determined standing-wave ratio.

The invention relates to the technical field of underwater acoustic transmitting transducers, and particularly discloses a curved longitudinal vibration type underwater acoustic transmitting transducer based on a 3D printing technology and a preparation method thereof, the curved longitudinal vibration type underwater acoustic transmitting transducer comprises a metal shell, a plurality of groups of rigid foam plastic, a plurality of groups of piezoelectric ceramic wafer piles, a plurality of prestressed bolts, a metal mass block and a transmitting end with a cavity, each group of piezoelectric ceramic wafer stack is composed of forward polarization piezoelectric ceramics and negative polarization piezoelectric ceramics, the polarization directions of the forward polarization piezoelectric ceramics and the negative polarization piezoelectric ceramics are opposite, and brass gaskets are arranged in the middle and on the two sides of each group of piezoelectric ceramic wafer stack respectively and used for leading out electrodes; according to the underwater acoustic transmitting transducer, the transmitting end is manufactured through the 3D printing technology, the integrality is high, the influence of secondary assembly on work of the underwater acoustic transmitting transducer is reduced, and good work stability of the underwater acoustic transmitting transducer can be guaranteed.

The application relates to a two-dimensional adjustable ultrasonic vibration auxiliary cutting device which comprises a vibration flat plate, a supporting base, four supporting columns, a stepped horn a, a stepped horn b, a longitudinal vibration piezoelectric transducer a and a longitudinal vibration piezoelectric transducer b. The vibration flat plate is of a stepped structure. The four supporting columns are vertically arranged, the upper ends of the four supporting columns are fixedly connected with the four corners of the vibration flat plate respectively, and the lower ends of the four supporting columns are fixedly connected with the supporting base simultaneously. The stepped horn a and the stepped horn b are horizontally arranged. The small end of the stepped horn a is fixedly connected with the center position of the left side surface of the vibration flat plate perpendicularly, and the large end is fixedly connected with the longitudinal vibration piezoelectric transducer a. The small end of the stepped horn b is fixedly connected with the center position of the back side surface of the vibration flat plate perpendicularly, and the large end is fixedly connected with the longitudinal vibration piezoelectric transducer b. The device has the characteristics of simple structure, less energy dissipation and good machining stability, and can realize efficient and low-damage milling and pin machining.

The utility model discloses a kind of car sunroof guide rails with buffering noise reduction structure, it is related to sunroof guide rail field, this kind of car sunroof guide rail with buffering noise reduction structure includes the guide rail main body extending along first direction, outwardly extending mounting plate is formed on the guide rail main body one side outer wall, multiple mounting holes are opened on mounting plate, for bolt connection frame, bolt is passed in mounting hole when connecting;This kind of car sunroof guide rail with buffering noise reduction structure forms three-dimensional grid structure by buffer groove and extension groove, main rubber pad absorbs vertical impact, extension rubber pad inhibits longitudinal vibration, double elastic deformation greatly reduces the area of mounting plate contact part after installation with frame, blocks vibration transmission path, rubber ring in the protruding part groove isolates bolt and mounting plate metal contact, eliminates high-frequency friction abnormal sound.

The application relates to a composite vibration ultrasonic welding head and a manufacturing method thereof, and belongs to the field of welding. The composite vibration ultrasonic welding head comprises a composite vibration rod, wherein a first type of inclined groove and a second type of inclined groove are arranged on the outer circumferential side surface of the composite vibration rod, the first type of inclined groove and the second type of inclined groove are arranged obliquely relative to the axis of the composite vibration rod and have opposite oblique directions. In the excited state of the composite vibration ultrasonic welding head, the length of the composite vibration rod is an integer multiple of the longitudinal vibration half wavelength and an integer multiple of the torsional vibration full wavelength, and the difference between the longitudinal vibration frequency and the torsional vibration frequency is 2%-7% of the longitudinal vibration frequency. In the welding process, the composite vibration ultrasonic welding head can effectively realize the coupling of longitudinal vibration and torsional vibration, and the service life of the welding head is improved.

The invention provides an ultrasonic transducer and ultrasonic cleaning equipment, the ultrasonic transducer comprises a piezoelectric exciter and a vibration radiant panel, the vibration radiant panel is fixed on the piezoelectric exciter, a power supply is electrically connected with the piezoelectric exciter, so that the piezoelectric exciter can generate longitudinal vibration, and the longitudinal vibration of the piezoelectric exciter can excite bending vibration of the vibration radiant panel. The longitudinal vibration sandwich type piezoelectric ultrasonic transducer solves the defects that an existing longitudinal vibration sandwich type piezoelectric ultrasonic transducer is small in radiation area, weak in longitudinal displacement amplitude, long in longitudinal size and the like to a great extent, and has the advantages of being small in space needed by operation, large in sound radiation area and sound radiation power, small in size and the like. The ultrasonic transducer can be widely applied to the application requirements of miniaturization and thinning of the installation space of the ultrasonic transducer. Meanwhile, the longitudinal bending displacement amplitude conversion ratio of the ultrasonic transducer can be influenced by the length, and / or the width and / or the thickness of the vibration radiant panel, so that the longitudinal bending displacement amplitude conversion ratio of the ultrasonic transducer is further improved through the size of the vibration radiant panel.

The invention relates to the technical field of mixing equipment, in particular to an ecological cement-based iron tailing mixture preparation device which comprises an L-shaped bearing seat and a mixing cylinder. The locking oscillation unit is arranged on the outer side of the bottom end of the L-shaped bearing seat in a surrounding manner and is connected with the L-shaped bearing seat; a collection box; the multidirectional fusion unit is arranged between the L-shaped bearing seat and the material mixing cylinder, is connected with the L-shaped material supporting seat, and is connected with the locking oscillation unit; wherein the multi-direction fusion unit comprises a supporting driving assembly, a movable stirring and mixing assembly and a synchronous transverse pushing assembly, by arranging the multi-direction fusion unit, transverse reciprocating motion and longitudinal reciprocating motion of a stirring device can be achieved at the same time, and transverse reciprocating motion and longitudinal vibration of a material mixing cylinder can also be achieved at the same time; therefore, the equipment can prepare more mixtures at one time, the mixing sufficiency of the mixtures is guaranteed, the production efficiency is guaranteed, and the quality of roadbed materials is guaranteed.

Disclosed is an ultrasonic composite vibration converter capable of more efficiently converting vibration energy generated from a transducer having an ultrasonic vibrator into ultrasonic composite vibration in a booster. The ultrasonic complex vibration converter of the present invention comprises: a booster; a ring coupled to the circumference of the booster at an inclined angle from a vertical tangential direction; and a transducer coupled to the ring. Longitudinal vibration generated by the transducer is converted into a rotational and longitudinal vibration force through the booster.

The invention relates to the technical field of ultrasonic knife equipment, in particular to a method for detecting and determining a rubber coating point of a waveguide rod, and aims to solve the problem that the method for detecting and determining the rubber coating point of the waveguide rod is poor in effect. According to the technical scheme, the method comprises the following steps: obtaining an initial simulation waveguide rod structure diagram, and extracting a displacement diagram of longitudinal vibration of the initial simulation waveguide rod to obtain an initial '0' point location diagram; carrying out processing heat treatment according to the initial simulation waveguide rod structure diagram to obtain a bare waveguide rod, and testing static data of the bare waveguide rod, including a bare waveguide rod impedance value R; and taking the impedance value R as a reference value, testing a dynamic real-time impedance value R0 when the bare waveguide rod vibrates under the working frequency, if R-R0 is less than or equal to a preset value, making the bare waveguide rod by using the initial simulation waveguide rod structure diagram to continue testing, and testing dynamic test data of the bare waveguide rod by using the movement of the interference assembly part instead of positioning encapsulation. The theoretical deviation of pure acoustic simulation is reduced, and the cost of repeated mold opening verification is reduced.

The utility model discloses an automobile seat cushion spring assembly, and relates to the technical field of automobile seats, the automobile seat cushion spring assembly comprises four serpentine spring single bodies, the four serpentine spring single bodies are arranged side by side at equal intervals, an L-shaped cross beam is arranged between one ends of the four serpentine spring single bodies, and the other ends of the four serpentine spring single bodies are connected with the serpentine spring single bodies. L-shaped cross beams are arranged between the other ends of the four serpentine spring single bodies and connected with the serpentine spring single bodies in a plastic coating mode, rectangular cross beams are arranged between the other ends of the four serpentine spring single bodies and connected with the serpentine spring single bodies in a plastic coating mode, an elastic connecting plate is arranged between every two adjacent serpentine spring single bodies, and the two ends of each elastic connecting plate are connected with the serpentine spring single bodies in a plastic coating mode. According to the automobile seat cushion spring assembly, the elastic connecting plates are installed between every two adjacent serpentine spring single bodies, vibration generated in the longitudinal direction can be buffered through the elastic connecting plates, the longitudinal tensile property is improved, and the using effect of the spring assembly is improved.

The invention discloses a vibration suppression and energy efficiency improvement method for a marine propulsion system, and belongs to the technical field of ship vibration control and energy efficiency optimizing.The method comprises the steps that vibration signals at a middle bearing, a propeller hub and a main engine base are collected, and three paths of filtering signals are obtained through band-pass filtering; front and rear flow velocity signals and main shaft rotating speed signals of a propeller are collected, and the ratio of the flow velocity difference to the rotating speed difference is calculated to obtain an energy efficiency coefficient; the three paths of filtering signals are multiplied by the energy efficiency coefficient to generate three paths of control signals, and the three paths of control signals are output to the three piezoelectric actuators to generate displacement amounts which act on a bearing shell, the inner wall of a propeller hub and a main engine base; when the propulsion shafting vibrates longitudinally, the metal push rod drives the coil to reciprocate between the permanent magnets to generate induced current, the induced current is stored in the storage battery after being rectified and supplied to the hydraulic controller to adjust the oil flow of the hydraulic cylinder according to a control signal, and graded suppression of multi-source vibration and recycling of vibration energy are achieved. And the vibration suppression effect and the energy efficiency level of the system are obviously improved.

The invention discloses a radial ultrasonic vibration grinding wheel suitable for high-speed grinding and a using method. The grinding wheel comprises a grinding wheel resonance outer ring, a non-contact electric energy transmission device, an ultrasonic transducer, a grinding wheel front cover plate, a grinding wheel rear cover plate and a grinding material layer. Ultrasonic transducers in a longitudinal vibration mode are uniformly mounted on the inner circumferential surface of the resonant outer ring, and power is supplied to the transducers in a non-contact manner, so that the resonant outer ring generates radial ultrasonic vibration in an expansion vibration mode. The abrasive material layer is made of cubic boron nitride or diamond abrasive particles and is fixed to the outer circumferential face through brazing or electroplating, and efficient cutting of a workpiece is achieved. And the grinding force can be effectively reduced and the machining efficiency and the surface quality can be improved by cooperating with rotation and feeding movement of a machine tool spindle. Test results show that the method is suitable for precise grinding of hard and brittle materials and difficult-to-machine materials under the conditions of high speed and large cutting depth.

The present invention discloses a device for improving the density and vibration quality of large-volume concrete pouring, which comprises: a vibrating steel mesh, which comprises longitudinal vibrating steel bars and transverse vibrating steel bars, wherein the longitudinal vibrating steel bars are arranged in the gaps between the structural steel bars of the concrete structure, one end of the longitudinal vibrating steel bars is connected to the inner formwork via a fixed sleeve, and the other end is connected to the outer formwork via a fixed sleeve; the transverse vibrating steel bars are arranged in the gaps between the structural steel bars of the concrete structure, and the transverse vibrating steel bars are connected to the longitudinal vibrating steel bars; a vibrating motor, which is connected to the vibrating steel mesh via a vibration transmission member to transmit vibration to the vibrating steel mesh. The present invention achieves vibration of the concrete by laying the vibrating steel mesh in the gaps between the structural steel bars of the concrete structure and using the vibrating motor to drive the vibrating steel mesh to vibrate. Vibrating in the form of a vibrating steel mesh has the advantages of uniform and comprehensive vibration, and effectively avoids the occurrence of vibration leakage, uneven vibration, and the like.