93 results about "Radial vibration" patented technology

The invention relates to the technical field of flywheel energy storage equipment, in particular to a flywheel rotor dynamic balance self-adaptive adjusting method and system based on magnetorheological fluid. The method comprises the steps that the sealing state of a magnetorheological fluid cavity is detected through a pressure sensor, and it is ensured that the pressure in the cavity is stable and free of leakage; the non-contact displacement sensor executes zero calibration, and output signal fluctuation is controlled within a preset range; carrying out no-load test on a current output port of the self-adaptive control module; when the rotating speed rises from a static state to a preset rotating speed value, a sensor of the real-time monitoring module synchronously collects a radial vibration signal of the rotor, decomposes a fundamental frequency vibration component with the same frequency as the rotating speed, and calculates the amplitude and the phase of the unbalance; when the rotating speed is stabilized in a preset rotating speed interval, the self-adaptive control module enters a closed-loop adjusting state, and when an unbalanced phase is calculated according to detection, a corresponding compensation quadrant fan-shaped cavity is locked, and the current of an electromagnetic coil is adjusted; the problem of traditional adjustment lag is solved, and over-compensation and under-compensation under variable working conditions are avoided.

The application relates to an ultra-high pressure telescopic oil cylinder for a rotary drilling machine and an assembling method thereof. The ultra-high pressure telescopic oil cylinder comprises a cylinder barrel, a piston rod is arranged in the cylinder barrel and slides in the axial direction, a protective cover is arranged on the piston rod and covers the outside of the cylinder barrel, a plurality of damping assemblies are arranged on the protective cover and are arranged in the length direction of the cylinder barrel, the damping assemblies comprise fixing seats arranged on the outer side wall of the protective cover, a supporting rod is arranged in the fixing seat and slides in the radial direction of the piston rod, a first damping spring is arranged on the outside of the supporting rod, a telescopic rod is further arranged in the fixing seat and is connected with the supporting rod, a roller is rotatably arranged on the telescopic rod, a guide is arranged on the cylinder barrel and is located on the sliding path of the roller, and the guide is used for guiding the roller to move to / from the outer side wall of the cylinder barrel. The application has the effect of effectively relieving the negative influence of the radial vibration of the piston rod of the oil cylinder on the hydraulic system and the performance of equipment.

The utility model provides a shock absorption assembly, motor assembly and range hood, including shock absorption piece and connecting piece, shock absorption piece is attached to connecting piece, shock absorption piece is equipped with convex part, connecting piece is equipped with accommodation groove, convex part is at least partially embedded in the accommodation groove. According to the damping assembly provided by the utility model, as the convex part is at least partially embedded in the accommodating groove, when the damping assembly is applied to the motor assembly, through the interaction of the convex part and the inner surface of the accommodating groove, on one hand, the axial vibration and the radial vibration of the motor can be effectively counteracted, so that the damping effect is well achieved; and on the other hand, the installation of the damping piece can be limited, and the problem that the damping effect is reduced due to the fact that the damping piece deviates between the motor and the connecting piece is solved.

The application discloses a DST test pipe column safety checking method and relates to the technical field of oil and gas field exploration and development. The method comprises the following steps: a pipe column stress distribution model is established according to pressure impact, axial and radial vibration effects in the perforating process; a perforating explosion pressure field is calculated through impact load data of the pipe column at the perforating explosion moment, and spiral buckling evaluation is carried out; a packer stress model in the perforating process is established according to the type of the packer, the safety of the packer under the perforating working condition is analyzed, and packer safety evaluation under the perforating working condition is formed; the pipe column is subjected to the perforating pressure wave and three-direction stress effects, plastic conditions and strength conditions of the fourth strength theory are obtained, and the fourth strength theory is used for pipe column strength calculation and checking; and the pipe column safety in the perforating process is comprehensively evaluated based on the spiral buckling evaluation, the packer safety evaluation and the fourth strength theory calculation result. The method is simple in calculation, convenient in operation and simple and easy to implement in evaluation.

A tool holder, for a tool assembly, comprising a tubular element having a cavity and a central axis; a damping mass arranged within the cavity and movable radially with respect to the central axis and relative to the tubular element; an adapter having a rear part fixed to the tubular element, and a front part for connection to an end effector of the tool assembly, the rear part comprising an opening, and the damping mass is at least partly received in the opening with a radial clearance; and an elastic element positioned between the adapter and the damping mass, the elastic element being arranged to support the damping mass and to damp radial vibrational movements of the damping mass relative to the tubular element, and the elastic element comprising a front surface substantially perpendicular to the central axis and a rear surface substantially perpendicular to the central axis.

The invention relates to the technical field of motor performance test equipment, in particular to performance simulation and test equipment and method for a dual-redundancy motor, and the performance simulation and test equipment for the dual-redundancy motor comprises a base, a mounting frame, a vibration ring, a torque detection unit and a connection socket. The connection socket is fixedly connected with a buckle, the connection socket is provided with a connection interface which is in circuit connection with a detected motor, and the torque detection unit is connected with a rotor of the detected motor and detects the output torque of the detected motor; vibration generated by the radial vibration motor and the axial vibration motor on the vibration ring is transmitted to the mounting ring and the dual-redundancy motor, the vibration of the dual-redundancy motor in the running process when the dual-redundancy motor is mounted on an automobile is simulated, and the position and angle of the vibration transmitted to the dual-redundancy motor are changed by rotating the transmission rod. Therefore, the performance simulation test effect of the invention is improved.

The application provides a damping foot pad, a compressor and a refrigeration and heating device. The damping foot pad comprises a shell with an inner cavity, a shaft core, a sheet spring, an eddy current damping mechanism for damping axial vibration of the shaft core, and a magnetic damping mechanism; the magnetic damping mechanism comprises an inner magnetic ring and an outer magnetic ring for generating magnetic repulsion to the inner magnetic ring in the direction of the shaft core. The damping foot pad of the application damps the axial vibration of the shaft core by setting the eddy current damping mechanism, sets the inner magnetic ring on the shaft core, and sets the outer magnetic ring coaxially around the inner magnetic ring. Since the eddy current damping mechanism and the magnetic damping mechanism have very small stiffness close to zero at the start of vibration, quasi-zero stiffness damping is formed, the axial and radial vibration isolation frequency ranges of the damping foot pad are wide, good axial and radial vibration isolation can be achieved, and the vibration isolation effect is good.

The present application relates to a kind of distributed optical fiber microseismic sensing device and tunnel monitoring method, belong to microseismic monitoring technical field, distributed optical fiber microseismic sensing device includes multiple installation in the same tunnel section vibration measurement sensitizing component, multiple vibration measurement sensitizing component is connected by distributed sensing optical cable;Distributed sensing optical cable in vibration measurement sensitizing component is arranged along tunnel radial, for monitoring the vibration signal of the development of the hidden crack and micro crack of surrounding rock along radial near working face.In monitoring, the first end or tail end of distributed optical fiber microseismic sensing device one vibration measurement sensitizing component is sequentially connected with distributed optical fiber demodulator, monitoring host and monitoring center, and constitutes microseismic sensing monitoring network.The method for tunnel monitoring using the above-mentioned distributed optical fiber microseismic sensing device can realize the perception of vibration signal along axial and along radial, overcome the defect that distributed sensing optical fiber is only sensitive to axial vibration signal and not sensitive to radial vibration signal.

The utility model relates to the technical field of stirring equipment, and discloses a mixing stirrer capable of preventing leakage, which comprises a main body cylinder and a top plate, the top plate is fixedly arranged at the upper end of the main body cylinder, an annular chute is arranged at the lower end of the top plate, a motor is fixedly arranged at the center of the lower end surface of the top plate, and a long rod is fixedly arranged at the output end of the motor. A stable frame is fixedly arranged at the position, close to the upper end, of a rod body of the long rod in a sleeving mode, sliding blocks are fixedly arranged at the two ends of the stable frame respectively, pulleys are fixedly arranged on the inner sides of the two sliding blocks respectively, the two sliding blocks are slidably arranged in the annular sliding grooves respectively, and the two pulleys slide on the inner side walls of the annular sliding grooves respectively. According to the stirring device, the long rod rotates to drive the stabilizing frame to rotate, so that the stabilizing frame drives the sliding block to roll in the annular sliding groove and slide along the inner side of the sliding groove in cooperation with the pulley to form a multi-point supporting structure, the radial vibration of the long rod and the stirring blades is effectively reduced, and the stability in the stirring process is improved.

The invention relates to the technical field of stirring paddles, in particular to a uniform mixing bioreactor stirring paddle which comprises a column body, the rotating shaft is rotationally connected into the column body; through the innovative composite design of a double-layer differential transmission mechanism and vibration stirring, three-dimensional chaotic mixing is realized, and the mixing efficiency and quality are remarkably improved; the upper-layer first rotating mechanism drives a plurality of first stirring paddles to rotate at a set speed through a gear train formed by a first gear ring, a first gear and a second gear ring; the second rotating mechanism at the lower layer drives a second stirring paddle through another independent gear system, slides in a corrugated groove with a specific angle through a T-shaped block, and generates periodic radial vibration in combination with an elastic component; the rotation-vibration composite motion breaks the flow field symmetry of traditional one-way stirring, can effectively eliminate a mixing dead zone, enables nutrient substances, dissolved oxygen and cells to be highly uniformly distributed, and is especially suitable for a high-density and high-viscosity culture system.

The application relates to a robot milling semi-active vibration suppression end effector and a control method based on an MRF-MRE hybrid medium, which comprises a hybrid medium system constructed in parallel with a magneto-rheological fluid and a magneto-rheological elastomer, controllable energy dissipation damping provided by the MRF filled in a shearing gap, variable dynamic stiffness provided by the MRE as a supporting element, tracking adjustment of an inherent frequency and independent suppression of a vibration amplitude realized through differential or common-mode magnetic fields generated by double excitation coils, and a heat-magnetic compensation mechanism based on impedance monitoring of the excitation coils, which effectively solves the performance drift problem in long-time machining. The end effector adopts a non-rotating design, the mover assembly is radially vibrated with the cutter but not rotated with the cutter through the antifriction bushing, and the reliability and sealing life in the high-speed milling working condition are remarkably improved.

The application discloses a ship engine room infrared thermal image and vibration combined diagnosis method based on a multi-mode, relates to the technical field of mechanical equipment state monitoring, and synchronously collects infrared thermal image data and vibration data of a contact area between a bearing seat and a mounting base structure in an engine room operation process, forms an infrared thermal imaging frame sequence and a vibration signal data sequence through data processing; constructs a contact area thermal image sequence and a radial vibration attenuation sequence according to the infrared thermal imaging frame sequence and the vibration signal data sequence, and maps to a unified time axis for consistency determination; aggregates time sub-sections with inconsistent evolution rhythms to form a thermal-vibration response deviation trend, judges the thermal-vibration response deviation trend, and outputs thermal-vibration response deviation results of the contact area. The method is suitable for positioning and discriminating abnormal contact between a bearing seat and a mounting base of a ship engine room through time sequence correlation analysis of thermal image information and vibration information for combined identification of the structure contact state.

This invention discloses a vibration suppression device for a positive displacement vane pump and its motor, belonging to the field of vibration suppression technology. The damping and vibration reduction assembly includes a rotating box, inside which a horizontally arranged support column is connected. Two symmetrically arranged inner rings are connected to the outer periphery of the support column. An outer ring is coaxially arranged on the outer periphery of each inner ring. Multiple buffer springs arranged in a circular array are connected between the outer and inner rings. Multiple buffer balls arranged in a circular array along the axis of the support column are arranged between the two outer rings. In this invention, by setting a multi-degree-of-freedom buffer mechanism composed of inner rings, outer rings, buffer springs, damping telescopic rods, and buffer balls inside the rotating box, axial and radial vibrations generated during the main shaft transmission can be absorbed in all directions. Utilizing the elastic deformation of the buffer springs and the slow rebound characteristics of the damping telescopic rods, the vibration suppression effect is significantly improved, ensuring the smoothness and reliability of the transmission system operation.

The invention discloses an evaluation method for vibration impedance performance of a range extender rotor hub, and the method comprises the steps: setting a plurality of response points on the surface of the rotor hub, and enabling the response points to be distributed at two axial sides and to be circumferentially symmetrical; broadband sine excitation is applied to the radial direction of each response point, and excitation force and multidirectional vibration response of each point are recorded; calculating a global vibration impedance response function based on the exciting force and the vibration response data, and drawing a vibration impedance curve; based on the vibration impedance curve, a radial secondary mode, a radial tertiary mode, a shafting primary core mode and a shafting secondary core mode of the vibration impedance curve are identified respectively, and related numerical values are recorded; and then calculating a radial vibration impedance coefficient RK according to the radial modal parameters, calculating a shafting vibration impedance coefficient SK according to the shafting modal parameters, calculating a total vibration impedance coefficient by combining the RK and the SK, and performing grading evaluation.

The invention discloses a membrane separation and purification device for ethylene glycol production, and relates to the technical field of membrane separation, the membrane separation and purification device comprises a fixed pressing plate, a movable pressing plate, a plurality of layers of liquid inlet assemblies and membrane separation assemblies, and the liquid inlet assemblies and the membrane separation assemblies are alternately stacked between the fixed pressing plate and the movable pressing plate; the hollow shaft penetrates through the liquid inlet assemblies and the membrane separation assemblies which are arranged in a multi-layer stacking manner; the rotary liquid distribution mechanism is arranged in the liquid inlet area; the central vibration generating mechanism is arranged in the separation area and synchronously operates with the hollow shaft; and the plurality of edge vibration generating mechanisms are uniformly distributed in the separation area and synchronously operate with the hollow shaft. Annular vibration waves generated by the center vibration generation mechanism and radial vibration waves generated by the edge vibration generation mechanism are spread on the membrane supporting net plate and the attached separation membrane and interfere with each other, so that attached or to-be-attached pollutant particles are loosened and stripped; and the on-line and active anti-pollution capability of the device is enhanced.

The utility model discloses an alloy drill bit with a chip breaker groove, which comprises a fixed seat, an alloy drill bit, the chip breaker groove and a feeding mechanism, the alloy drill bit is arranged on the fixed seat, the chip breaker groove is arranged on the side wall of the alloy drill bit, and the fixed seat is connected onto the feeding mechanism. The four-direction linkage supporting structure has the advantages that by arranging the four-direction linkage supporting structure, the drill bit can achieve multi-dimensional stress balance in the machining process, local loads of traditional single-point supporting such as an air cylinder telescopic rod are effectively dispersed, the contact area of the drill bit and a workpiece is increased to be multiple times of that of a traditional structure, and the machining efficiency of the drill bit is improved. According to the design, a closed-loop rigid frame is formed through the four symmetrically-distributed supporting points, radial vibration caused by cutting force fluctuation in the machining process is remarkably restrained, the dynamic deflection amplitude of the drill bit is greatly reduced, and the drill bit is particularly suitable for a high-precision deep hole machining scene; a traditional independent driving mode of an air cylinder or a hydraulic cylinder is replaced.

This utility model discloses a bearing radial vibration testing device, including a base plate. A fixing mechanism is provided at the upper end of the base plate, and a vibration mechanism is provided on the side of the fixing mechanism. A bearing is provided on the surface of the fixing mechanism. The fixing mechanism includes a platform, with a bidirectional threaded rod rotatably connected inside the platform. A knob is fixedly connected to the side of the bidirectional threaded rod, and a moving block is threadedly connected to the surface of the bidirectional threaded rod. A fixing plate is fixedly connected to the upper end of the moving block, and a clamping plate is fixedly connected to the upper end of the fixing plate. Through this structure, rotating the knob simultaneously rotates the bidirectional threaded rod. Then, through the sliding groove and the fixing plate, the two moving blocks move inward, simultaneously moving the clamping plate and the rubber sleeve fixedly connected to the side of the clamping plate, thereby fixing the column device and achieving rapid positioning, facilitating disassembly by personnel.

The embodiment of the present application relates to a kind of dual-frequency high-power liquid processing ultrasonic transducer, comprising: one end of amplitude transformer is connected with sandwich transducer to form longitudinal displacement output structure;Metallic pipe is provided with mounting hole in side surface, mounting hole is connected with amplitude transformer by connecting piece arranged in the conical end of amplitude transformer, both ends of metallic pipe are provided with concave flexure shell;The half-wave mode and full-wave mode of longitudinal displacement output structure make the radial vibration and axial vibration of metallic pipe, form the complex frequency operating mode of ultrasonic transducer.The embodiment of the present application excites the radial vibration and longitudinal vibration of metallic pipe by the half-wave and full-wave mode of longitudinal displacement output structure respectively, realizes the dual-frequency operating mode of ultrasonic transducer;Concave flexure shell amplifies the radial vibration displacement of metallic pipe in phase, increases the acoustic radiation area of metallic pipe axial vibration, improves the acoustic radiation power of ultrasonic transducer and the uniformity of transducer radiation sound field.

This utility model discloses a vibration-damping dryer, including a drying tank. Several support plates are evenly distributed circumferentially along the middle of the outer wall of the drying tank. A first vibration-damping component is provided above the support plates, and a second vibration-damping component is provided below the support plates. The second vibration-damping component is mounted on an installation platform, and an adjustment port is provided in the middle of the installation platform. The bottom of the drying tank passes through the adjustment port. The first vibration-damping component is used to buffer radial vibration of the drying tank, and the second vibration-damping component is used to buffer axial vibration of the drying tank. This utility model uses a drive unit to drive a crushing unit, employs multiple first vibration-damping components to buffer radial vibration of the drying tank, and coordinates with second vibration-damping components to buffer axial vibration of the drying tank. This achieves the reduction of mechanical vibration in all directions generated during daily operation of the drying equipment, extending the service life of the drying equipment, reducing noise, and protecting operators.

This application relates to the field of strain measurement and discloses a strain gauge for detecting radial vibration and torque, comprising: a first substrate on which a first strain gauge is encapsulated by a film; a second substrate on which a second strain gauge is encapsulated by a film; a third substrate on which a third strain gauge is encapsulated by a film, a connecting portion on one side of the third substrate, and a corner of the first and second substrates adjacent to each other connected to the connecting portion; the first, second, and third strain gauges all measure strain using a Wheatstone bridge; and a support body including a first support end, a second support end, and a fixed plate, wherein the first support end is used to cooperate with a rotating shaft, the fixed plate is connected between the first and second support ends, the first and second substrates can be bent at the connecting portion and then attached to the fixed plate respectively, and the third substrate can be attached to the rotating shaft. This application can simultaneously detect radial vibration and torque.

The invention discloses a composite throttling static pressure gas radial bearing for a wafer thinning machine gas floating main shaft, and belongs to the technical field of static pressure gas bearings. Comprising a bearing shell, a bearing inner ring and a composite throttler which are sequentially arranged in the bearing shell in the axial direction, compression cages symmetrically arranged on the two axial outer side end faces of the bearing shell, and elastic rings, grading rings and pre-tightening compression rings which are arranged between the bearing shell and the interiors of the compression cages. The compression cage comprises a compression cage outer ring, a compression cage inner ring, a compression ring axially arranged between the inner ring and the outer ring, and a plurality of elastic compression structures evenly connected between the compression ring and the compression cage outer ring and the compression cage inner ring in the circumferential direction. By designing the compression cage structure, the radial vibration motion of the bearing inner ring is converted into the axial vibration of the pre-tightening compression ring, then the strain energy of the elastic ring is converted into electric energy consumption, piezoelectric shunt damping is provided for the bearing, the vibration amplitude of the bearing inner ring is reduced, and the stability of the static pressure gas radial bearing is effectively improved.

The present application relates to the technical field of aerospace equipment, in particular to a lunar soil penetration probe, comprising: a shell, a plurality of load cabins are sequentially arranged along the axial direction of the shell; a multi-stage buffer and vibration isolation structure is arranged in the shell and located between two adjacent load cabins, the multi-stage buffer and vibration isolation structure can reduce the axial and radial vibration of the plurality of load cabins; a solid boost rocket is arranged at one end of the shell, and an expandable antenna is arranged at the end of the solid boost rocket; a penetration cap is arranged at the other end of the shell. The multi-stage buffer and vibration isolation structure can effectively attenuate and absorb high-frequency impact signals in the penetration impact overload, that is, most of the high-frequency sharp pulse burr signals caused by the resonance of the lunar soil penetration probe can be effectively filtered out, and the damage caused by the high-frequency burr pulse overload to the scientific load is effectively reduced.

The invention discloses a wellhead disassembly-free rotary blowout preventer, which belongs to the field of petroleum mechanical equipment and comprises a shell and a rotary assembly positioned in the shell. A hollow cavity is formed in the shell, and a first conical surface setting step and a second conical surface setting step are arranged on the inner wall of the hollow cavity. The rotating assembly comprises an outer cylinder, and a conical surface step I and a conical surface step II which are arranged at the lower end of the outer cylinder; the lower end of an outer barrel of the rotating assembly is in inclined plane fit with a conical surface setting step through a conical surface step, meanwhile, a pressing inclined plane above the outer barrel is also in inclined plane fit with an alignment conical surface, a double-conical-surface self-centering pressing structure is adopted, upper and lower large-angle conical surfaces are matched, and axial locking is achieved through a hydraulically-driven opening and closing pressing plate; radial vibration can be effectively absorbed and counteracted through slope matching, the whole rotating assembly and the shell tend to be integrated mechanically, and the risk that a sealing face is damaged due to vibration is reduced.

This invention relates to the field of tunnel construction technology and discloses a tunnel pre-vibration grouting device and method. The grouting device includes a delivery pipe, a protective mechanism fixedly installed on the outer wall of the delivery pipe, and a reinforcement mechanism at the edge of the protective mechanism. The reinforcement mechanism is used to reinforce the wall of the grouting hole and is arranged along the axial direction of the delivery pipe. The protective mechanism includes a first movable block and a second movable block. This invention reduces the damage to the grouting hole caused by the vibration of the delivery pipe by setting a protective mechanism composed of a first movable block, a second movable block, a first cavity, and a second cavity on the outer wall of the delivery pipe. It absorbs the axial and radial vibrations caused by grout pulses without reducing the grouting speed, preventing further loosening of the loose strata and collapse and deformation of the grouting hole caused by vibration, solving the grout leakage problem, and ensuring grouting pressure to fully fill small gaps and eliminate reinforcement blind spots.

The application provides an adaptive quasi-zero stiffness foot pad, a compressor and a refrigeration and heating equipment. The adaptive quasi-zero stiffness foot pad comprises a base, a shaft core, an end cover, a magnetic attraction damping mechanism and a magnetic repulsion damping mechanism. The magnetic attraction damping mechanism comprises a permanent magnet inner ring and a permanent magnet outer ring, and the permanent magnet outer ring is arranged around the permanent magnet inner ring. The magnetic repulsion damping mechanism comprises an inner magnetic ring and an outer magnetic ring for generating a magnetic repulsion force on the inner magnetic ring in the direction of the shaft core, and the outer magnetic ring is arranged around the inner magnetic ring. The adaptive quasi-zero stiffness foot pad of the application sets the permanent magnet outer ring around the permanent magnet inner ring to form an adaptive magnetic force type negative feedback structure and form axial quasi-zero stiffness damping. The outer magnetic ring is arranged around the inner magnetic ring, and the outer magnetic ring generates a radial magnetic repulsion force on the inner magnetic ring, which makes the inner magnetic ring drive the shaft core to tend to the radial center to slow down the radial vibration of the shaft core and form radial quasi-zero stiffness damping. Therefore, the adaptive quasi-zero stiffness foot pad realizes good axial and radial damping and has good damping effect.

This invention discloses a turbine testing apparatus, belonging to the technical field of turbine testing equipment. This apparatus uses a limiting unit between mounting bases. Within the limiting unit, a first directional limiting component and a second directional limiting component are mounted via a bracket. The first directional limiting component limits the connecting lug from a first direction, and the second directional limiting component limits the connecting lug from a second direction. This achieves limiting of the turbine test piece from both directions. After the turbine test piece is installed, the first and second directions are perpendicular to the axial direction of the turbine test piece. By limiting the turbine test piece from the second direction, radial vibration of the turbine test piece can be effectively restricted, reducing vibration during testing, increasing the rotor's critical speed, ensuring successful test completion, and reducing the impact of vibration on measurement results. This ensures accurate final measurement results, provides accurate and effective test data for turbine design, reduces wear on the turbine testing apparatus, lowers maintenance costs, and reduces testing risks.

Angular sensor comprising: a resonator 2() capable of exhibiting a vibration mode, radial with respect to an axis of symmetry of the resonator (2); transducers (5.1, 5.2, 6.1, 6.2) to provide a first measurement signal and a second measurement signal of a deformation of the resonator (2) respectively along a first direction and a second direction orthogonal to each other of a reference frame of the vibration mode and to apply a force on the resonator (2) along these two orthogonal directions; and an electronic processing circuit (7) electrically connected to the transducers (5, 6) and arranged so as to determine from the measurement signals an estimate of an angular velocity applied to the angular sensor and to emit control signals of the transducers (6.1, 6.2).2) to generate and maintain a vibration of the resonator (2) at a frequency corresponding substantially to a theoretical natural frequency and with a substantially constant amplitude a and a substantially zero quadrature component q, by processing an amplitude control error where is an amplitude controlled to an amplitude setpoint, a quadrature control error, an angle estimation error and a phase estimation error, characterized in that the electronic processing circuit (7) is arranged to perform compensation making said errors insensitive to a variable angular velocity of the sensor by taking into account the theoretical natural frequency and the angle estimation of the angular sensor. FIGURE OF THE ABRIDGED: Fig. 1.

The invention relates to the technical field of piezoelectric transformers, in particular to a radial vibration piezoelectric transformer with asymmetric protruding electrodes and a preparation method of the radial vibration piezoelectric transformer. A primary side and a secondary side of the piezoelectric transformer can be formed by alternately stacking piezoelectric ceramic materials with the same or two different dielectric constants, and no isolation piece or an isolation piece is arranged between the primary side and the secondary side; the intelligent temperature control layer is arranged on the outer layer of the transformer and comprises a thermosensitive phase change material; the self-adaptive frequency regulation circuit is connected with the input end of the transformer; and the insulation heat dissipation channel structure forms an annular insulation heat dissipation gap at the edge of the ceramic single sheet. Through reasonable matching of primary and secondary structure parameters and a load relation, the piezoelectric transformer has excellent characteristics of constant current output, constant power output, same phase or pi phase difference between input voltage and input current and the like, the efficiency of the piezoelectric transformer is improved to the greatest extent, the loss of the piezoelectric transformer is reduced, and the reliability of the piezoelectric transformer is improved.

The application discloses a kind of rotating machinery vibration state intelligent monitoring systems, axial monitoring unit is used to monitor the shaft axial vibration of rotating machinery, axial monitoring unit is installed in the shaft axial side;Multiple radial monitoring units monitor the shaft radial vibration of rotating machinery, multiple radial monitoring units are evenly distributed in the shaft radial periphery;Positioning unit is installed on the shell of rotating machinery, positioning unit is used to install each monitoring unit;Each monitoring unit includes linear ball grid measuring scale, the output end of each monitoring unit is connected to a early warning unit.By axial and radial vibration monitoring unit, the shaft axial vibration and radial vibration of rotating machinery are directly monitored in real time, early warning is prompted through early warning unit, to avoid mechanical failure, the shaft system vibration of the application is directly monitored to rotating machinery, detection result is accurate, and the vibration of axial and radial is monitored simultaneously, and monitoring result is more comprehensive.

The invention discloses a main shaft dynamic balance test method and system based on an intelligent sensor. The method comprises the steps that radial vibration data of a to-be-tested main shaft are collected in real time and preprocessed; predicting to obtain a predicted comprehensive score; establishing a preset sample library, and determining a voltage fluctuation interval corresponding to each main shaft sample in the library; and when the predicted comprehensive score is not in a preset comprehensive score interval, determining a voltage basic adjustment unit according to the voltage fluctuation interval of the main shaft sample or the analyzed and predicted comprehensive score to adjust the voltage of the electric field, and if the adjustment of the analyzed and predicted comprehensive score is passed, collecting the real vibration data of the adjusted to-be-measured main shaft. Determining a correction coefficient and correcting the voltage basic regulation unit; the temperature of the to-be-measured spindle is collected in real time, and when the temperature reaches a preset value, the to-be-measured spindle is adjusted. The high-precision dynamic balance control of the main shaft is realized by collecting and predicting the vibration data of the main shaft in real time and dynamically adjusting the voltage of the electric field.