703results about How to "Smooth vibration" patented technology

A capacitor microphone is constituted by a plate having a fixed electrode, a diaphragm including a center portion and at least one near-end portion that is fixed to the outer periphery, in which the center portion having a vibrating electrode, which is positioned relative to the fixed electrode and which vibrates in response to sound waves, is increased in rigidity in comparison with the near-end portion; and a spacer that is fixed to the plate and the near-end portion of the diaphragm and that has an air gap formed between the plate and the diaphragm. Alternatively, a diaphragm electrode is horizontally supported by extension arms extended from a circular plate thereof and is vertically held in a hanging state being apart from a fixed electrode with a controlled distance therebetween.

A first weight portion of a vibration actuator includes an inner-side enlarged portion that protrudes from an end portion of a solid head in a direction of a vibration axis and that is inserted into an opening portion extending within a first compression coil spring along the direction of the vibration axis. An outer peripheral surface of the inner-side enlarged portion becomes continuously smaller in diameter from a base end towards a free end, with the vibration axis being the center of the diameter. That is, the inner-side enlarged portion has the shape of a truncated cone. The inner-side enlarged portion is inserted into the opening portion of the first compression coil spring and the opening portion is utilized to change the length of the inner-side enlarged portion in the direction of the vibration axis, thereby changing the mass of the first weight portion.

A linear vibration generator is disclosed. The linear vibration generator in accordance with an embodiment of the present invention includes a stationary part, which has a polygonal-prism-shaped coil and in which the polygonal-prism-shaped coil induces a magnetic field by having an electric current supplied, a vibrating part, which has a polygonal-prism-shaped magnet and in which a portion of the polygonal-prism-shaped magnet is inserted into the coil, an elastic member, which is coupled to the stationary part and elastically supports the vibrating part such that the vibrating part can move linearly, and a lubricating band, which is formed on an outer circumferential surface of the magnet.

The invention relates to a shearing control method and a shearing control device for circle shears. The method comprises the following steps: when the head of a steel strip reaches the front parts of entrance pinch rolls, a command sender takes the entrance pinch rolls as a speed command body to send a shearing and biting speed command; when the head of the steel strip reaches a main cutting edge, the command sender takes the main cutting edge as the speed command body, maintains the shearing and biting speed, and controls the entrance pitch rolls to follow and be synchronous with the linear speed of the main cutting edge; and when the head of the steel strip reaches exit pitch rolls, the command sender takes the main cutting edge as the speed command body to send an acceleration command, controls the main cutting edge to speed up to achieve the shearing speed required in a high-speed shearing command within 0.5 to 2 seconds, and controls the exit pinch rolls to follow and be synchronous with the linear speed of the main cutting edge. The control method and the control device effectively reduce instantaneous impact loads withstood by all mechanical parts at the time of biting, prolong the service life of shearing equipment, reduce maintenance cost, reduce the failure rate of a clamping chute at a cutting edge, and improve equipment stability and utilization rate.

A piezoelectric sounding body in which a stable high sound pressure can be obtained over a wide frequency band. The piezoelectric sounding body includes a resin film, a piezoelectric vibrating plate attached to the center of one surface of the resin film with a tackiness layer, and a case supporting the periphery of the resin film. The piezoelectric vibrating plate is formed in a rectangular shape. An adhesive is applied between the middle of each long side of the piezoelectric vibrating plate and the resin film, along each long side of the piezoelectric vibrating plate. The separation between the piezoelectric vibrating plate and the tackiness layer can be prevented during sounding, and a stable sound pressure can be obtained for a prolonged period.

The invention discloses a ballastless track grouting lifting and lifting correcting method. The method comprises the following steps: step 1: before lifting, using a high-precision level gauge to measure the track surface and under-track empty area, according to the measuring result, determining the lifting position and lifting quantity of a track board, and determining the arrangement position, space distance, hole diameter and hole depth of a grouting hole; step 2: calculating and determining the cutting position of a closing layer, and cutting the closing layer; step 3: arranging the grouting holes in the position to be lifted, preparing a polymer bag and arranging holes in the polymer bag; step 4: inserting a grouting pipe into the polymer bag, and fixing; step 5: installing the grouting pipe and the polymer bag in the grouting hole; step 6: executing the grouting lifting, monitoring in real time during the lifting process, and guaranteeing the track lifting elevation; and step 7: after executing certain amount of the grouting lifting, correcting the part to be corrected, monitoring the correcting process in real time, and guaranteeing the correcting displacement of the track. After completing the grouting, the high polymer bag and a grouting material carry out the compaction with the surrounding soil so as to form a self-formation pile. The solution is capable of realizing the rapid and accurate lifting of the upper structure of the track.

The present invention discloses a induction type ultrasound electric principal shaft, which is composed of two parts: the rear part being an electric principal shaft and the front part being a ultrasound vibration system, electromagnetic field interference between the two parts being insulated by a shield ring, the motor making the principal shaft to rotate in high speed; the ultrasound vibration system is composed of an ultrasound transducer, a amplitude-variation lever and a tool head, and generates an axial ultrasound vibration of the principal shaft; an ultrasound driving signal is transmitted between a ultrasonic transmitter and a ultrasonic receiver with induction mode, wherein the non-contact type transmission signal being capable of omitting electrical brush, avoiding brush wear, reducing heating and improving greatly the rotary speed of the principal shaft; the principal shaft is supporting by a fore bearing, a middle bearing and a rear bearing, therefore the stiffness and rotating accuracy of the principal shaft can be improved, and the fore bearing is supported on the wave node point of the ultrasound vibration system, thus the vibration can be reduced; water-sealing covers are packed outside the motor and the ultrasound signal transmission system, and the cooled water ensures the principal shaft to be used in normal temperature all the time.

A vibrating gyroscope includes a columnar vibrator, a driver and a detector. The columnar vibrator includes first and second piezoelectric substrates polarized in mutually opposite directions along the thickness directions thereof and stacked with each other. Two divided electrodes are formed on one main surface of the first piezoelectric substrate and spaced in the direction perpendicular to the longitudinal direction of the first piezoelectric substrate, and a common electrode is formed on one main surface of the second piezoelectric substrate. The driver drives the vibrator in the thickness direction of the first and second piezoelectric substrates and is connected between the divided electrodes and the common electrode. The detector detects a displacement caused by bending vibration of the vibrator, and is connected to the divided electrodes. The vibrator has substantially the same resonant frequency in the two diagonal directions which diagonally connect four edges elongating in the longitudinal direction of the vibrator.

The invention discloses a turbocharger rotor unbalance amount control method based on dynamic characteristics. The method comprises the steps that a turbocharger rotor bearing system dynamics finite element solid model is built; (2) different unbalance amount excitation modes are applied to the dynamics finite element solid model, and vibration responses and stability rules of turbocharger rotor unbalance position, size and phase difference to the measuring points of two bearings are summarized; (3) the optimum allocation scheme of unbalance excitation on the rotor position, size and phase difference is determined with the minimum root-mean-square value of the vibration amplitude as the judging criteria; (4) turbocharger rotor structure parameters are optimized until the vibration amplitudes at the positions of the two turbocharger rotor bearings are the minimum and the stability at the positions of the two turbocharger rotor bearings is the best. According to the turbocharger rotor unbalance amount control method, unbalance control is applied in the turbine end and air pressing end structure design and manufacturing process, stable and efficient running of the whole machine can be achieved, and unbalance vibration faults caused in the rotor running process are effectively reduced.

The invention provides an ultrasonic wave and microwave extraction system for traditional Chinese medicines. The system is provided with a coordinated regulation device, wherein a first alarm device, a second alarm device and a third alarm device are arranged on the coordinated regulation device; the coordinated regulation device firstly controls microwave lead-in devices to lead in microwaves, after a certain time, the first alarm device sends an alarm signal to the coordinated regulation device, and the coordinated regulation device controls an ultrasonic wave lead-in device to lead in ultrasonic waves; after a certain time, the second alarm device sends an alarm signal to the coordinated regulation device, and the coordinated regulation device controls the microwave lead-in devices and the ultrasonic wave lead-in device to change the operating powers to be respectively lower than the initial powers of the microwave lead-in devices and the ultrasonic wave lead-in device; the third alarm device sends an alarm signal to the coordinated regulation device after the microwave lead-in devices and the ultrasonic wave lead-in device work with the changed operating powers for a certain time, and the coordinated regulation device firstly controls the microwave lead-in devices to stop working and then controls the ultrasonic wave lead-in device to stop working. The best matching effects of ultrasonic waves and microwaves are achieved by arranging the coordinated regulation device to strictly control the lead-in time, lead-in order, lead-in powers and closing time of the ultrasonic waves and the microwaves.

The invention discloses a vertical molding mold for a concrete utility tunnel. The vertical molding mold comprises a mold base (1), a female end mold (2), an external mold (3) and one or more internal molds (4). The mold base (1) is fixed on the ground, the female end mold (2) is arranged on the mold base (1), the external mold (3) is arranged on the mold base (1) and located on the periphery of the outer side of the female end mold (2), one or more internal molds (4) are arranged on the mold base (1) and located on the periphery of the inner side of the female end mold (2). The molding mold and system and production technology for the concrete single-cabin, dual-cabin and multiple-cabin utility tunnel is high in quality and large in scale and can be rapidly and largely produced.

A vibration system for concrete pipe making machines using the dry cast method and which employ adjustable molds comprised of corner panels joined to intermediate panels. Two coupled vertically spaced-apart vibrators are mounted in two opposite corner panels of the mold core. The vibrators are mounted on shelves welded to the interior of the walls that form the mold surface. The shelves are also welded to vertical end walls that extend inwardly to form the box-like corner panel. The corner panels and intermediate panels are secured together by removable fasteners that join the vertical end walls of the corner panels to the corresponding vertical end walls of the side panels. The joined corner panels and side panels provide a rigid core structure similar to a solid core and allow the entire core to become the vibration structure.

An electroacoustic transducer includes a magnetic circuit unit that forms a magnetic gap, a voice coil inserted into the magnetic gap, and a diaphragm to which the voice coil is connected. The diaphragm has a central portion having an outer peripheral edge and an annular portion disposed underneath the central portion. The annular portion has an outer peripheral edge corresponding to the outer peripheral edge of the central portion, and an inner peripheral edge secured to the magnetic circuit unit. The diaphragm further has a joint portion formed at the outer peripheral edges of the central and annular portions, and the outer peripheral edges are joined together. The voice coil is disposed underneath the central portion of the diaphragm and joined to the joint portion.

An imaging displacement module including a frame, an optical element, a carrier, a connecting portion and at least a first actuator is provided. The frame has a first opening, and the optical element, the carrier, the connecting portion and the first actuator are all disposed in the first opening. The carrier is capable of carrying the optical element, and the connecting portion connects between the frame and the carrier and capable of generating an elastic torsion around an axis. The first actuator is disposed at a side of the carrier and capable of driving the carrier to vibrate periodically.

The invention discloses a flexible ultrasonic glue dipping device. The flexible ultrasonic glue dipping device comprises a tank body, wherein the tank body is provided with an inner concave chamber for containing liquid resin, is of a two-layer structure and comprises an inner tank body and an outer tank body; a space for storing cycling medium is formed between the inner tank body and the outer tank body; the outer tank body is respectively provided with a liquid inlet and a liquid outlet which are respectively communicated with the space; and the outer wall of the outer tank body is provided with a flexible ultrasonic device with adjustable parameters such as frequency and power. The flexible ultrasonic glue dipping device disclosed by the invention has the advantages that ultrasonic waves produced by the ultrasonic device act on fiber and the liquid resin uniformly by means of the cycling medium to realize glue dipping, and after the glue dipping procedure is finished, when a glue dipping tank is cleaned, the ultrasonic waves also act on sewage in the tank body, therefore, for the glue dipping and cleaning processes, a physical means is adopted in the flexible ultrasonic glue dipping device, and on the basis of realizing glue dipping, the cleaning effect is improved, the cleaning process is simplified, and the influence on the reuse effect of the glue dipping tank is avoided.

The invention discloses a papermaking device for rice paper production. The papermaking device comprises a papermaking plate, a vibrating device and a control unit, wherein the edges of the papermaking plate are provided with a frame; the control unit comprises a swinging arm and connecting devices; each connecting device comprises a supporting rod, a first air cylinder and a telescopic connecting rod; two ends of the connecting rods are respectively connected to the swinging arm and the first air cylinders; piston rods of the first air cylinders are hinged to the edges of the papermaking plate; sliding grooves are formed in the papermaking plate; one end of each supporting rod is connected into the corresponding sliding groove in a sliding way; the other end of each supporting rod is hinged to the corresponding connecting rod; the piston rod of the first air cylinder and the supporting rod are symmetrically arranged at the same edge of the papermaking plate along the center line of the papermaking plate; the length of each supporting rod is equal to the total sum of the length of each connecting rod under a hinging point of the connecting rod and the length of each first air cylinder; the vibrating device comprises a vibrator and a control device; the vibrator is arranged on the papermaking plate. By implementing the scheme, the problem in an existing papermaking technology that the rice paper is not high in quality or high in cost is solved.

A concrete single-bin utility tunnel horizontal forming mold comprises a mold base (1), side mold bodies (2), a plug end mold body (3), a socket end mold body (4), an inner container mold body (5) and a supporting frame (6), wherein the mold base (1) is fixed on the ground; the side mold bodies (2) are arranged on two sides of the mold base (1); the plug end mold body (3) and the socket end mold body (4) are independently arranged at the front and rear ends of the mold base (1); the plug end mold body (3) or the socket end mold body (4) is fixed on the supporting frame (6); the inner container mold body (5) is arranged on the supporting frame (6); and the supporting frame (6) is arranged on the ground or the mold base (1). The invention further provides a concrete single-bin utility tunnel horizontal forming system and a production process thereof. The concrete single-bin utility tunnel horizontal forming mold and system as well as the production process have the advantages that the quality is high, the scale is large, and rapid mass production can be achieved.

An elastic sieving method and corresponding large-sized elastic vibration screen The present invention utilizes a screening surface and a separate sieving machine. A screen mat located on the sieve box is connected to multiple small rectangular screens. While the machine is vibrating, the resonation of screen rods located on the screen mat connected by small rectangular screens are initiated to screen the material and to cause the vibration of the whole vibration screen and realize the conveyance and lamination of materials. Because the screening surface is in a state of resonance, the vibration strength is strong enough to prevent the screen meshes from becoming plugged, allowing for high sieving efficiency. A bearing in the sieving mechanism is installed with a vibration damping ring, placing the bearing in a resonant state, allowing for a low dynamic stress level, which satisfies the process requirement for large-sized vibration screen excitation units with a screening surface as wide as 4800 mm. Thus, the production efficiency of vibration screen is high, the structure of the machine is simple and easy to repair and maintain, and energy consumption is reduced. Furthermore, the dynamic stress level of the sieving machine is low, the reliability is high, and the vibrations are stable. These properties allow the present invention to have a wide range of practical applications, including uses in the coal, metallurgic, chemical and environmental protection fields.

A flow tube (3) composed of a bent tube having a shape symmetrical with respect to a first axis is supported at its both ends by support portions (8, 8) having an outlet and inlet respectively. A drive device (4) for alternately driving the flow tube (3) rotationally about a second axis connecting the positions where the flow tube (3) is supported is disposed on the vertical axis of a Coriolis flowmeter (1).

A pair of second drive devices (5, 5) for alternately driving the flow tube (3) rotationally are disposed at positions laterally symmetrical with respect to the drive device (4). The paired second drive devices (5, 5) are driven in phase; the drive device (4) is driven with the opposite phase to those of the second drive devices (5, 5). A pair of vibration detecting sensors (6, 6) are disposed between the drive device (4) and one of the second drive device (5) and between the drive device (4) and the other (5) respectively. The sensors (6, 6) detect vibrations with phases the difference between which is in proportion to the Coriolis force acting on the flow tube (3) disposed laterally symmetrically with respect to the drive device (4).