36results about How to "Improve vibration performance" patented technology

The invention discloses system for testing the rotation and vibration performance of an inertia device, which consists of a rotation driving system, a vibration test system, a rotation and vibration tool and a data testing system. In the rotation driving system, a motor drives the inertia device to be tested to rotate through a flexible shaft; in the vibration test system, a vibration table drives the inertia device to be tested to vibrate through a gapless bearing; and in the data test system, the output data of the inertia device to be tested are tested by a conducting slip ring. In the system for testing the rotation and vibration performance of the inertia device, the motor operates in a non-vibration environment, the bearing has excellent vibration performance, and the data test system is free from data wire torsion. The system testing the rotation and vibration performance of the inertia device can be used to test the performance of various inertia devices when the inertia devices rotate on any shaft and vibrate along a direction parallel or perpendicular to the shaft, and has a rotation speed of 0 to 10,000 degrees per second, a rotation angle free from limitation, a random vibration of 1 g<2>/Hz within a range from 10 to 2,000 HZ, and the sine sweep vibration of 30 g within a range from 10 to 2,000. At present, no other system can achieve the same goal.

Disclosed is a linear vibration generating device including: a stator including a bracket on which a coil is seated, and a case made of a magnetic material which is engaged to the bracket to form an inner space; a vibrator including a permanent magnet for generating a vibration force in cooperation with the coil, and a weight enclosing a circumference of the permanent magnet; a resilient member which is positioned between the vibrator and the stator to resiliently support vertical oscillation of the vibrator; and a plate which is positioned between the resilient member and the vibrator.

The invention discloses a turbine compressor test system. The turbine compressor test system is characterized in that rotation output of a motor is driven to a turbine compressor main shaft of a turbine compressor through a transmission case and a torque sensor so as to form a test main engine, an air inlet disturbance unit, an exhaust disturbance unit, an airflow actuating device and a measure and control unit are respectively arranged aiming at the test main engine. The turbine compressor test system provided by the invention can test properties of the turbine compressor under various working conditions such as different air inlet condition saltations, air inlet distortion and exhaust conditional mutation, simulate the excitation of airflow to blades under different work conditions through an experimental method, and measure the parameters including stress and vibration frequency of the blades under situations with different excitation of airflow.

There is provided a bumper absorber attachment structure including (1) bumper reinforcement, (2) a first engaged portion that is formed at a vehicle upper side of a side face at a vehicle front side of the bumper reinforcement, (3) a second engaged portion that is formed at a vehicle lower side of the side face at the vehicle front side of the bumper reinforcement, (4) a bumper absorber that includes a thinned portion, an upper leg, and a lower leg, (5) a first engagement portion that is formed at a vehicle rear side of the upper leg, and that engages with the first engaged portion, and (6) a second engagement portion that is formed at a vehicle rear side of the lower leg, and that engages with the second engaged portion in a case in which the bumper absorber is displaced toward the vehicle lower side in a collision.

A control arm assembly for a suspension system of a vehicle includes a control arm having a triangular shape for connection to vehicle structure and a beam axle of the vehicle. The control arm assembly also includes a plurality of bushings connected to the control arm and for connection to the vehicle structure and the beam axle of the vehicle.

The invention belongs to the field of aircraft engine design, and relates to a self-protection control method of an aero-engine in an unwarmed state. The method comprises the following steps that an engine starting mode and an engine state are acquired; if the engine starting mode is cold-state starting and the engine state is a slow running state or a state below the slow running state, a controlinstruction of a throttle lever PLA is received to start the engine; and if the engine starting mode is cold-state starting and the engine state is a state above the slow running state, a control instruction of a built-in throttle lever PLA is received to start the engine, wherein the control instruction of the built-in throttle lever PLA changes along with the trend of the control instruction ofthe throttle lever PLA, and the change rate is controlled within a set value. After the entering condition of warm-up starting is met, the built-in throttle lever PLA is used for replacing a mechanical throttle PLA to control the engine, and the problem of engine surge caused by quick push-up of a throttle is effectively avoided.

The invention discloses a real time compensation method of the rectification error in a fiber gyro. The method comprises the following steps: carrying out periodic square wave phase modulation and closed loop control on an optical system, carrying out analog-to-digital conversion sampling on the output signal of the optical system to obtain digital sampling values of the output signal, and synchronously demodulating to obtain a digital quantity corresponding to an angular speed; and measuring the light intensity and the residual phase in the fiber gyro in real time, carrying out spectrum analysis on the obtained light intensity and the residual phase to obtain the amplitude spectrum parameter and the phase spectrum parameter of the light intensity and the residual phase, calculating the current rectification error of the fiber gyro by using the amplitude spectrum and the phase spectrum of the light intensity and the residual phase, subtracting the obtained rectification error from the angular speed obtained through the synchronous demodulation of the fiber gyro to obtain a compensated angular speed, outputting the angular speed, and carrying out real time compensation on the rectification error. The method can compensate the rectification error of the fiber gyro in real time, and improves the vibration performance of the fiber gyro.

The invention provides a mud removing feeding machine, and belongs to the technical field of mining machines. The mud removing feeding machine comprises a vibration box, and an excitation device for driving the vibration box to vibrate. The upper end face of the vibration box is a feeding conveying face, and the feeding conveying face comprises multiple conveying faces, and the multiple conveyingfaces are in continuous butt joint along the mineral aggregate advancing path and are arranged sequentially from high to low in a ladder shape. Each conveying face is composed of multiple screen bars,and has screening clearances, and the length direction of the screen bars is consistent with the advancing direction of mineral aggregate. The widths of the screen bars are gradually reduced in the mineral aggregate advancing direction, and the screening clearances formed by the screen bars of the same conveying face are gradually enlarged in the mineral aggregate advancing direction. According to the mud removing feeding machine, the feeding conveying face is arranged in the ladder shape, the screen bars of special structures are adopted, blocking happening in the feeding process can be reduced, and a very good mud removing and screening effect is achieved.

The invention discloses a vibrating power head device, which comprises a vibrating assembly and an outer box arranged outside the vibrating assembly, a guiding mechanism is arranged between the vibrating assembly and the outer box, the vibrating assembly includes a vibrating box and a gear box, and the front end of the gear box The drilling tool is connected through the output joint, and the vibration box is detachably connected at the rear end. In the present invention, a vibration box and a gear box are arranged in the outer box. Through the fixed connection between the vibration box and the gear box, the vibration box directly drives the gear box and the main shaft to vibrate together, thereby driving the drilling tool to vibrate and rotate the drilling at the same time, which can effectively reduce the vibration of the main shaft. The damage received makes the vibration transmission route more reasonable. Moreover, the vibration box and the gear box ensure that the vibration displacement of the vibration component only occurs in the axial direction through the guiding mechanism, and limit the unreasonable vibration in other directions, so that the generation and transmission of the exciting force are stable and reliable, and the impact direction is consistent. Improve the work efficiency of drilling holes.

The invention discloses a focusing shock wave excitation device for performing non-contact excitation on an MEMS (micro electro mechanical system) micro structure. The focusing shock wave excitation device comprises a base plate, wherein a manual three-axis displacement table and a support seat are arranged on the base plate; a micro structure unit is arranged on a Z-axis slide plate of the manual three-axis displacement table; an ellipsoid cavity with an inner cavity being half of an ellipsoid surface is arranged at the upper end of the support seat; the first focus point of the ellipsoid surface is positioned in the ellipsoid cavity; the micro structure unit is positioned at one side of a second focus point of the ellipsoid surface; a pin electrode unit is arranged on the ellipsoid cavity; two pin electrodes are electrically connected with two electrodes of a high-voltage capacitor; a first air switch is arranged between the high-voltage capacitor and one pin electrode; the distance between the pin points of the second pin electrodes is smaller than the maximum air breakdown gap after the high-voltage capacitor is sufficiently charged; the high-voltage capacitor is electrically connected to positive and negative electrodes of a high-voltage power supply. The focusing shock wave excitation device has the beneficial effects that the interference of the vibration response of the base structure on the test result can be avoided; the non-contact excitation on the MEMS micro structure is realized; the excitation effect is good; the dynamic feature parameters of the micro structure are convenient to obtain.

The present invention discloses a focused shock wave excitation device for the dynamic feature testing of the microstructure of an MEMS (micro-electromechanical system). The device includes a substrate, a manual tri-axial displacement table and a supporting seat; the Z-axis slide plate of the manual tri-axial displacement table is provided with a microstructure unit; the upper end of the supporting seat is provided with an ellipsoidal cavity of which the inner cavity is half of an ellipsoidal surface; the first focus of the ellipsoidal surface is located in the ellipsoidal cavity; two sides of the ellipsoidal cavity are symmetrically provided with two pin electrode units; the tips of the two pin electrode units are located at the cross section of the first focus and point to the first focus; the microstructure of the MEMS is located at the second focus of the ellipsoidal surface; the two pin electrodes are electrically connected with the two poles of a high-voltage capacitor; a first air switch is arranged between one pin electrode and the high-voltage capacitor; the two poles of the high-voltage capacitor are electrically connected with a high-voltage power source; and the connection and disconnection of the high-voltage capacitor and the high-voltage power source are controlled by a second air switch. With the focused shock wave excitation device adopted, interference on a testing result caused by the vibration response of a base structure can be avoided, the non-contact excitation of the microstructure of the MEMS can be realized, an excitation effect is good, and the testing of the dynamic feature parameters of the microstructure can be facilitated.

A buffer for a subway rail comprises equipment for buffering and reducing shake. The equipment comprises a positioning plate fixedly connected into a base, a moving opening is formed in the positioning plate, a buckling block is movably connected into the moving opening, a buckling strip is fixedly connected to the upper end of the buckling block, and an assembling block is fixedly connected to the upper end of the buckling strip. Stabilizing equipment comprises positioning blocks fixedly connected to the two sides of the upper end of the assembling block, adjusting openings are formed in thepositioning blocks, screws used for adjusting are connected into the adjusting openings in a screwed mode, and one end of the screw used for adjusting is fixedly connected with a moving block. In combination with other structures, the defects that in the prior art, vertical and horizontal shake caused by high-speed operation of subway wheels can damage the interior and exterior of a rail, the service life of track is reduced, rivets and rivet holes used for stabilizing wheels shake, so that the tracks shake, running of the wheels is not facilitated, the specifications of the tracks are still different, and targeted stabilizing equipment does not exist are overcome.

The invention provides a vibration reduction module. The vibration reduction module comprises a length-changeable damping frame and a weight-changeable balancing weight located in the vibration reduction frame, the balancing weight is provided with two oppositely-arranged end faces, the two end faces of the balancing weight elastically abut against the inner walls of the two sides of the vibrationreduction frame respectively, elastic extrusion force is formed on the end faces of the balancing weight and the inner wall of the vibration reduction frame respectively, and the elastic extrusion force changes along with the elastic coefficient; at least one pair of fixing elements is arranged on the outer wall of the vibration reduction frame, the arrangement direction of the fixing elements isperpendicular to the axis of the balancing weight, each fixing element corresponds to one locking element, and the vibration reduction frame is detachably connected with the vibration equipment through the fixing elements and the locking elements in sequence. The vibration reduction frame is modularized, the vibration reduction frame and the fan are combined into a complete fan system, and when the fan rotates to generate vibration, due to the fact that the vibration is transmitted to the vibration reduction frame, the balance weight mass on the inner side is driven to vibrate along with thevibration; and under the condition that the two vibration frequencies are inconsistent, the energy is naturally consumed, and the energy transmission is reduced.

The invention provides a linear vibrating motor. The linear vibrating motor comprises connecting components I, elastic components I, elastic components II, connecting components II, grooves, springs,a mounting plate, a protruded edge and two threaded holes, wherein the two threaded holes are formed in the left and right sides of the upper end surface of the mounting plate, and the protruded edgeis arranged on the upper end surface of the mounting plate. According to the design, the problem of the mounting manner of an original linear vibrating motor is tedious is solved; the connecting components I are arranged on the left and right sides of the inner wall of the shell, the grooves are formed in the left and right end surfaces of a vibration block, the springs are mounted in the grooves,the connecting components II are mounted outside the springs, the elastic components I are mounted between the connecting components II and the connecting components I, and the elastic components IIare mounted to be crossed with the elastic components I; the problem that the original vibration motor has defects on the vibration performance is solved; and the linear vibrating motor is reasonablein structure, good in vibration performance, convenient to mount and high in working efficiency.