516 results about "Radial vibration" patented technology

The invention relates to a device and method for vibration measurement and failure analysis of a rolling bearing. The device comprises a detected bearing mounting device, a speed sensor, a signal conditioning circuit, a data collection device and a computer, wherein a detected bearing is mounted on a mandrel of the detected bearing mounting device; a vibration rod of the speed sensor is arranged on a middle plane of an outer cylindrical surface of an outer ring of the detected bearing with prescribed pressure, the measurement direction is along the radial direction of the bearing and vertical to the axis of the bearing, and the signal conditioning circuit and the data collection device are connected to the computer; the speed sensor measures radial vibration speed signals of the outer ring of the bearing, the picked bearing radial vibration speed signals are converted into corresponding electric signals which are processed by the signal conditioning circuit and then transferred to the data collection device which carries out A/D conversion of the conditioned signals to convert the conditioned signals into digital signals capable of being processed by the computer, and finally the computer carries out analysis and processing of the digital signal. The device and the method are applicable to production test and user acceptance of finished bearings by laboratories and bearing manufacture factories.

The invention discloses a relative type rotary encoder and a measurement method thereof. The rotary encoder comprises a round coding disc, a rotary shaft, a data processing module, a casing, multiple light source systems and multiple photoelectric sensors, wherein a relative code channel and a reference zero code channel are arranged on the outer side surface of the round coding disc, the relative code channel comprises multiple grating strips which have the same width and are uniformly engraved on a circumference of the outer side surface of the round coding disc, and the reference zero code channel comprises two grating strips with different widths; the light source systems are all installed on the casing and are located in the radial direction of the round coding disc respectively; the plurality of photoelectric sensors are installed on the outer side of one light source system respectively and are connected with the data processing module. The relative type rotary encoder can avoid measurement errors caused by radial vibration, is high in measurement precision, anti-interference capacity, anti-pollution capacity and reliability and can be widely used for the field of rotation angle measurement.

A vibration isolation mount for a compressor that is formed of an elastomeric material and includes a sleeve, tapered studs or axial ribs spaced around the sleeve, and a lip seal extending around the sleeve. The mount is intended to be located between a compressor and a housing. The studs or ribs then deform to isolate the housing from radial vibration of the compressor, and the lip seal creates an annular seal between the housing and the compressor.

The invention discloses a cascade and parallel piezoelectric composite material-based cylindrical transducer, which comprises a support with an underpan, an annular backing, an end cover and a plurality of wafers, wherein the wafers are cascade and parallel piezoelectric composite wafers, are uniformly arranged on the outer side of the annular backing along the periphery and are polarized along the radial direction of the ring; insulating washers are cushioned on and under a tubular sensitive element consisting of the backing and the wafers; the tubular sensitive element is sleeved and fastened on the underpan of the support; and the end cover is fixed at the upper end of the support and on the insulating washer on the sensitive element. The transducer adopts a multi-wafer annular array as the sensitive element, the vibration of the wafers adopts a thickness model, the working frequency is higher than the radial vibration frequency of a round tube, and the high-frequency sound wave emission can be realized; moreover, because the wafers are mode of the cascade and parallel composite material, the electro-mechanical coupling factor of the composite material is high, the frequency band thereof is broad, and the transducer has high sensitivity and broad working frequency band; therefore, the transducer has the characteristics of high frequency, high sensitivity, broad band and level omnidirection.

The invention provides a prestressed stacked piezoelectric round tube transducer. The prestressed stacked piezoelectric round tube transducer comprises a lining tube, a plurality of layers of stacked piezoelectric round tubes arranged outside the lining tube in a sleeved mode and a device for prestressing the multiple layers of stacked piezoelectric round tubes. According to the tranducer, the multiple stacked piezoelectric round tubes are stacked, vibration of a vibrator is superposition of radial vibration of the multiple round tubes, and thus the sensitivity of the transducer is improved. Because all the round tubes are unequal in radius and different in resonant frequency, a vibration system of the transducer has multiple vibration modes, and the working band of the transducer can be expanded. Because the structure of the cylindrical round tubes is adopted, the transducer can acquire horizontal all-directional beam directivity. Glass fiber is wound on the stacked piezoelectric round tubes, the bearing capacity of the piezoelectric transducer can be improved because the transducer is prestressed, and thus the reliability of the transducer is improved.

The invention belongs to the technical field of mechanical measurement and is applicable to measurement of radial stiffness and axial stiffness of bearings. The measurement principle is based on a relationship between the bearing stiffness and inherent vibration frequency of a shaft for test. The method comprises the following steps of: in the process of measuring the radial stiffness of the bearing, solving a function relationship between the radial stiffness of the bearing and the first-order transverse vibration frequency of a shaft for test, building a physical system among the shaft for test, a measured bearing and a rigid support, measuring the first-order radial vibration inherent frequency of the shaft for test, and finally, calculating the radial stiffness of the bearing according to a function relationship between the inherent vibration frequency and the radial stiffness of the bearing; and in the process of measuring the axial stiffness of the bearing, solving the mass of the shaft for test, building a physical system among the shaft for test, the measured bearing and the rigid support, measuring the first-order axial vibration inherent frequency of the shaft for test, and finally, calculating the axial stiffness of the bearing according to a relationship between the vibration inherent frequency and the axial stiffness of the bearing.

The invention relates to a radial vibration-reducing stress-dissipating bracket for a pressure pipeline. The radial vibration-reducing stress-dissipating bracket for the pressure pipeline comprises a lower supporting block (9) and a lower bottom plate (13); the pressure pipeline (15) is supported on the lower supporting block (9); and the lower supporting block (9) is supported on the lower bottom plate (13). The radial vibration-reducing stress-dissipating bracket for the pressure pipe is characterized in that vertical type fixing brackets (11) are symmetrically arranged at two sides of the lower bottom plate (13); two radial clamping blocks (1) which are matched with the two sides of the pressure pipeline (15) are respectively connected with corresponding supporting plates (8); the supporting plates (8) are connected with corresponding vertical type fixing brackets (11) through respective fastening connecting pieces (7); and elastic supporting assemblies (20) are mounted on the fastening connecting pieces (7) and between the vertical type fixing brackets (11) and the supporting plates (8). With the adoption of the radial vibration-reducing stress-dissipating bracket for the pressure pipe, the rigidity of a piping system can be maintained and a vibrating stress generated in the radial direction of the piping system can be eliminated, thus the requirement of vibration-reducingsupport for the pressure pipeline can be satisfied.

The invention discloses a fault diagnosis method of a compressor shafting based on a three-dimensional space axle center orbit, comprising the following steps: (1) detecting radial vibration signals x(t) and y(t) of a compressor rotor; (2) detecting an axial vibration signal z(t) of the compressor rotor; (3) carrying out low-pass filtering on the vibration signals to eliminate a high-frequency interference signal; (4) acquiring the three-dimensional axle center orbit w(t); (5) forming the three-dimensional axle center orbit; (6) respectively filtering the vibration signals x(t), y(t) and z(t) in three directions and then reconfiguring the vibration signals in a time domain to obtain the three-dimensional filter axle center orbit; and (7) synthesizing the vibration signals using a spectrum analysis principle to obtain the synthesized axle center orbit. The invention provides a three-dimensional vibration analysis method on the basis of a holo-spectrum technology, and the method comprises synthesized three-dimensional vibration analysis and filter three-dimensional vibration analysis, which can more clearly and vividly reflect running status and fault characteristics of equipment. Rotor vibration comprises horizontal, vertical and axial vibration, and the vibration signals in the three directions are synthesized to form the three-dimensional axle center orbit which comprises the three-dimensional filter axle center orbit and the three-dimensional synthesized axle center orbit. The method can really reflect motion situation of the axle center of the rotor and provide more complete information for the fault diagnosis.

The invention provides a near-bit orientation dynamic measurement device and measurement method. The component of the gravity acceleration is measured through an accelerometer in the axial direction of a drilling toll, the component of the geomagnetic field is measured through a magnetometer in the radial direction of the drilling tool, and according to the strength of the local geomagnetic field, the magnetic inclination and the gravitational field overall strength data, the dynamic orientation angle is calculated. Compared with a traditional measurement while drilling (MWD), the method does not measure the geomagnetic field component in the axial direction of the drilling toll and the gravitational field component in the radial direction of the drilling toll, and the influence of the axial magnetic disturbance generated through drilling tool magnetization on the axial geomagnetic field component measuring and the influence of the centrifugal acceleration and radial vibration which are generated through rotating on the gravitational field component measuring are avoided so that dynamic measurement of the orientation angle in the drilling process can be achieved. According to the orientation dynamic measurement device, the number of used sensors is reduced to be three from six, the installation space is saved, power consumption of the sensor part is reduced, and the orientation dynamic measurement device is particularly suitable for requirement sensitive occasions of the installation size and power consumption during near-bit measuring.

The invention relates to a non-contact on-line detection device of a micro gap of a wire wrapped screen, mainly comprising an image collection unit, a laser vibration measurement unit, an imaging focusing unit and a host computer unit. The device uses the image collection unit to carry out real-time high-quality imaging on the micro gap of the wire wrapped screen, uses the laser vibration measurement unit to solve the influence of radial vibration on an imaging coefficient of the wire wrapped screen in the on-line processing process, calls an imaging coefficient base which is standardized in advance to resolve the micro gap of the wire wrapped screen, calculates a relative error, counts the unqualified rate of gap processing on line and judges whether the wire wrapped gap accords with an expected requirement or not. The imaging focusing unit is suitable for detecting screen gaps of various types. The invention forms a closed loop control processing system by butting an actual wire wrapped screen production line of a factory and has an important significance on on-line revising technological parameters of production, enhancing product indexes, abandoning an unqualified production section at an early date and reducing raw material waste.

The invention discloses an ultrasonic-extrusion reinforcement method and an ultrasonic-extrusion reinforcing device for a structural part connecting hole. According to the method, a core rod is used as an ultrasonic-extrusion reinforcing tool; the core rod uniformly passes through the connecting hole according to a speed of 10 mm/min to 60 mm/min at a condition that 2% to 6% of extrusion allowance is kept between the core rod and the connecting hole; meanwhile, the core rod is subjected to breathing type ultrasonic vibration of which the frequency is 15 kHz to 80 kHz and the alternating radial vibration amplitude is 3 to 50 microns; a pull-extrusion way is adopted during the overall process; the device comprises an ultrasonic wave generator, an ultrasonic vibrating part, a worktable, a guide cylinder, a hydraulic cylinder and a bracket, wherein the ultrasonic vibrating part is connected with a hydraulic rod by using a threaded sleeve; the hydraulic cylinder and the guide cylinder are separately installed at the two sides of a top plate of the bracket; and the worktable is installed on a base plate of the bracket. In the extrusion process, the extrusion allowance of the wall surface of the hole is increased, residual compressive stress is formed close to the wall of the hole, a radial residual compressive stress layer is deepened, lattice distortion is generated, dislocation density is increased, and axial plastic flowing of a material close to the wall surface of the hole is also reduced.

The invention relates to a novel process method for utilizing the ultrasonic wave to extract the artemisinin from the artemisia annua Linn. By adopting the orthogonal experimental design, the method obtains the target compounds through a plurality of technical parameters in the process of screening and extraction. The stems and leaves of the artemisia annua Linn serving as the materials and 80 per cent ethanol are added in an ultrasonic extraction batch at a ratio of solid to liquid (Kg:L) ranging from 1 to 15 to 1 to 17; a separate-excited ultrasound generating device and a radial vibration columnar transducer are adopted; the ultrasonic power is 1000W, the ultrasonic frequency is 35kHz, the extraction is carried out for one time at two minutes interval with an action time of 3 minutes and the total extraction time is 30min; the temperature is 40 DEG C; the mixtures in the ultrasonic extraction batch are subject to the air-lift type stirring and the extract is put into the ultrafiltration, and the filtrates in equivalent volume are subject to the petroleum ether ultrasonic extraction at a temperature ranging from 30 DEG C to 60 DEG C on the conditions that the separate-excited ultrasound generating device and the radial vibration columnar transducer are adopted with an ultrasonic power of 1000W and a ultrasonic frequency of 30kHz and the ultrasound has a continous effect for 10 minuts with a total extraction time of 15 minutes at a temperature of 25 DEG C; the air-lift type stirring is carried out, the ether extraction liquid is decolored by the activated carbon and concentrated by reducing the pressure and then the obtained solution is cooled down to be crystalized; 50 per cent ethanol is recrystalized. The extraction rate of the artemisinin from artemisia annua Linn is 97.25 per cent.

The present invention relates to a radial vibration sandwich piezoelectric ceramic ultrasonic transducer. A piezoelectric ceramic ring is arranged between a metal inner ring and a metal outer ring, the upper end surfaces of the metal inner ring, the metal outer ring and the piezoelectric ceramic ring are in the same plane, and lower end surfaces are also in the same plane. The metal inner ring and the metal outer ring can adopt steel rings, aluminum rings, brass or purple copper rings, titanium rings, aluminum nickel copper alloy rings and titanium alloy rings. The present invention realizes the high efficiency work of a radial composite transducer through a radial prestress impressed by the inner and outer metal rings, and realizes the parameter optimization of the transducer through reasonably designing the geometry size of the inner and outer metal rings simultaneously, such as resonance frequency, frequency bandwidth as well as electromechanical coupling coefficient. The present invention can be used for the high efficiency omni-directional acoustic source underwater and all kinds of supersonic processing high efficiency supersonic source in liquid.

The invention discloses a test-bed for a vibration test of a rolling bearing, comprising a test-bed body, a motor, a left test device and a right test device, wherein the motor is a motor with double output shafts, and the left test device and the right test device are connected with the left output shaft and the right output shaft of the motor respectively. The test-bed for the vibration test of the rolling bearing disclosed by the invention can measure the vibrations of two bearings simultaneously, and reduce interference on the vibration measurements of the measured bearings by configuring the motor to be a motor with double output shafts, disposing the left test device and the right test device on the two output shafts of the motor, and omitting a support bearing for supporting the motor; and the test-bed for the vibration test of the rolling bearing disclosed by the invention can perform radial loading on a transmission shaft, and act an axial load by disposing a radial loading device and an axial loading device on the test-bed body, thus being capable of measuring the radial vibrations of the measured bearings in the horizontal direction and the vertical direction.

A drive device for a hybrid vehicle, having two electric motors. In the drive device, an air gap between a rotor and a stator of an engine side electric motor can be reduced, and performance enhancement and reduction in size of the electric motors can be achieved. The drive device has a clutch (7) for connecting an engine output shaft (2) and a transmission input shaft (8) when the clutch (7) is engaged, a first electric motor (MG1) capable of transmitting drive force to the transmission input shaft (8) when the clutch is disengaged, and a second electric motor (MG2) capable of transmitting the drive force to the transmission input shaft (8) when the clutch (7) is disengaged. The first electric motor (MG1) is connected to the engine output shaft (2) via a radial vibration suppressing means (3) for suppressing vibration in the radial direction of the engine output shaft (2).

A spring motor having a pot shaped housing in which a flat spiral spring is housed. The flat spiral spring is connected at one outer end to the pot-shaped housing while the inner end is coupled to a shaft or axle. To prevent radial vibrations of individual spring layers when the spring motor is wound or unwound, a damping plate is housed in the pot-shaped housing and held in pressed engagement with a side edge of the flat spiral spring. This spring motor can be combined with the wind-up shaft of roller-blind arrangements for motor vehicles, including fixed roller blinds, storage-area covers, or separating screens.

The invention discloses a vibration-damping and noise-eliminating thermal expansion valve, which comprises a valve body (1), a power head (2), a push rod sleeve (3), a push rod (4), a steel ball valve core (5), a valve core holder (51), a damping clamp (6), a spring (7), an adjustment nut (8), and an O-shaped ring. According to the invention, the nylon push rod sleeve is arranged on the position where the push rod vertically penetrates through an air passage of the valve body; a refrigerant flow separating the air passage affects an aperture of the steel ball valve core by generating radial vibration to the push rod; and the damping clamp which is connected with the valve core holder and is elastically connected with the wall of a valve core hole is arranged in the valve core hole of the valve body, so that the aperture response motion of the steel ball valve core is lagged by friction damping between the damping clamp and the valve core hole, a flow adjustment response frequency of the thermal expansion valve is staggered with a peak phase of a vibration field frequency of an automobile, a sympathetic vibration technical scheme is avoided, and the sympathetic vibration and noise of an automotive air conditioning system during running can be eliminated.

An emission energy-converter of butterfly type is prepared for firm-jointing circular connection element of star-form combined actuator closely with two shells, utilizing longitudinal vibration mode of driving arm to generate radial vibration of circular connection element and to excite bend vibration mode of excitation shell as well as to use shell as radiation surface to radiate sound wave into media.

Disclosed is an undulating flow reciprocating screw vibrating cleaning type natural circulating evaporator. An undulating flow reciprocating screw of a steel wire structure is mounted in each heating pipe, the lower end of each undulating flow reciprocating screw is connected with a soft spring which penetrates a fixing plate to be wound and fixed on an assembling plate, and elastic coefficient of the soft springs is low. A fluid dynamic cleaning principle of the undulating flow reciprocating screws includes that high volatility of gas-liquid two-phase flow in the heating pipes is utilized to generate strong radial vibration on self-acting fluid dynamic force and generate axial reciprocating motion with stroke larger than one own screw pitch at the same time, and automatic cleaning of dirt on the inner wall of each pipe and convective heat transfer enhancing are realized. An undulating flow reciprocating screw cleaning mechanism is simple in structure, high in dirt cleaning capability, good in cleaning uniformity, suitable for natural circulating evaporators where dirt is prone to growing, and suitable for outer-heating-chamber natural circulating evaporators and outer-heating-chamber natural circulating reboilers.

The invention discloses a thin reverse type ultrasonic motor. Vertical and radial vibration generated by piezoelectric ceramic sheets can be converted into torsional oscillation modal of a waveguide structure in a stator, and a rotor can be made to realize a high rotation speed through the torsional oscillation modal. The thin reverse type ultrasonic motor comprises a rotation shaft (1), wherein the rotation shaft (1) penetrates through a slot pad (2), a spring (3), the rotor (5) and the stator (6), the slot pad (2) is fastened on the rotation shaft (1) through a key slot on the rotation shaft (1), the piezoelectric ceramic sheets are attached to upper and lower surfaces of the stator (6), the rotor (5) is driven to rotate by the stator (6) through friction, the stator (6) is internally connected with the waveguide structure, and the waveguide structure comprises uniformly-distributed spoked beams in a tangent relationship with a center cylinder. The thin reverse type ultrasonic motor is suitable for the precise driving and transmission technology field.

The invention discloses a radial vibration ultrasound honing device, belongs to the technical field of ultrasound honing and provides a radial vibration ultrasound honing device for ensuring that an oilstone edge performs radial vibration along a processed hole. In order to solve the technical problem, the technical scheme adopted by the invention is as follows: a main shaft is a hollow stepped shaft with a thicker middle and two thinner ends; a post rod, a transducer, an amplitude transformer and an expanded core shaft are all positioned in the main shaft, and the transducer is provided with an axial through hole; the post rod is positioned in the through hole, the bottom of the transducer and the top of the amplitude transformer are fixed together, and the amplitude transformer is provided with a flange; the bottom of the flange and one of a spring are fixed, the other end of the spring is fixed on a step of the interior hole of the main shaft, and the lower end of the amplitude transformer is connected with the upper end of the expanded core shaft through a thread; and multiple oilstone bases are arranged on a slotted hole through a top foot, and each oilstone base is fixedly provided with an oilstone. The radial vibration ultrasound honing device provided by the invention can be widely used for finishing or finish machining of holes of different shapes.

The invention relates to a downhole spiral flow shear vibration generator device which is used for spiral flow to replace a well cementation in petroleum drilling engineering and mainly aims to increase spiral flow intensity of cementing fluid and improve cementing effect. The downhole spiral flow shear vibration generator device comprises a coupling, an outer cylinder and a stream-guiding seat which are connected in sequence. A spiral flow generator is fixed on the upper wall of the outer cylinder. A shear rotor, a vibration rotor and a spiral flow rotor are arranged on the lower portion of an inner hole of the outer cylinder in sequence. Due to the fact that the downhole spiral flow shear vibration generator device takes spiral flow, shear and radial vibration pulse technology into account, downhole spiral flow shear vibration is formed, strength property of set cement is improved, and cementing quality is improved.

The invention provides a stator base for a three-degree-of-freedom spherical rotor ultrasonic motor, relates to the three-degree-of-freedom spherical rotor ultrasonic motor, and aims at solving the problems that an existing multi-degree-of-freedom rotary ultrasonic motor is insufficient in drive capability and complicated in structure, and miniaturization is difficult to implement. An axial vibration ring, a spacer ring and a radial vibration ring are coaxial, and the axial vibration ring and the radial vibration ring are connected through the middle spacer ring; the upper surface of the axial vibration ring is provided with four drive feet; ten piezoelectric ceramic pieces are fixed on each of the upper surface and the lower surface of the axial vibration ring, a space phase difference between two groups of piezoelectric ceramic pieces is 18 degrees and two adjacent piezoelectric ceramic pieces in each group are opposite in polarization direction; four piezoelectric ceramic pieces of the radial vibration ring are fixed on each of the upper surface and the lower surface of the radial vibration ring, the space phase difference between two groups of piezoelectric ceramic pieces is zero degrees and two adjacent piezoelectric ceramic pieces in each group are opposite in polarization direction; and all piezoelectric ceramic pieces are polarized along the thickness direction. The stator base for the three-degree-of-freedom spherical rotor ultrasonic motor is suitable for the three-degree-of-freedom spherical rotor ultrasonic motor.