11 results about "Balancing vibrations" patented technology

This invention discloses a method for graded early warning and active control of vibration and noise in automotive permanent magnet synchronous motors, belonging to the field of motor prediction and control. This method inputs real-time motor operating parameters and historical NVH time-series data into a pre-trained neural network prediction model to obtain stator vibration acceleration distribution images and sound pressure distribution images at future moments. Based on the prediction results and preset thresholds, the risk level is determined and graded early warnings are triggered. Based on the early warning level, an improved particle swarm optimization algorithm is used to solve for the optimal adjustment increment of the id / iq current, and the motor is dynamically adjusted through a current loop to achieve active suppression of vibration and noise. This invention can achieve advanced prediction and graded early warning of vibration and noise, forming a closed loop of "prediction-decision-control," achieving high-precision prediction with small sample sizes, balancing vibration and noise suppression with motor operating safety, and improving motor operation smoothness and reliability.

The invention discloses a transmission conductor damping device and method, and the device comprises a fixed part which is disposed on a transmission conductor; the rotating part is arranged outside the fixed part in a sleeving manner and is rotationally connected with the fixed part; the driving part is rotationally arranged at the end, away from the power transmission line, of the fixing part; the limiting part is arranged on the driving part; the telescopic rotating part is arranged on the driving part, the telescopic rotating part is separated from limiting of the limiting part in the plumb bob direction under the action of wind power and rotates to droop, so that the telescopic rotating part abuts against the rotating part to drive the rotating part to rotate, and then the rotating part generates upward acting force to balance vibration force; and the telescopic rotating piece is separated from the rotating part. The telescopic rotating part drives the rotating part to rotate to generate upward acting force by utilizing vertically downward vibration force of the power transmission conductor, so that the vibration force of the conductor is balanced, and the vibration of the conductor in the vertical direction can be effectively inhibited.

The application discloses a shaftless silent pump with an integrated rotor, which comprises a primary volute assembly, a front bearing assembly, a stator component, a double-stage rotor component, a secondary volute assembly and a rear bearing assembly. The stator component is composed of a stator shell, a stator core and front and rear flanges; the rotor component is composed of a rotor core, primary and secondary impellers and a rotor core pressing plate into an integrated structure, the primary and secondary impellers are arranged back to back on both sides of the motor, and the front and rear bearing assemblies are respectively located on the inlet sides of the primary and secondary impellers and are installed in the primary and secondary volutes. The integrated structure of the two-stage impellers back to back and the rotor core effectively improves the overall rigidity and dynamic balance of the rotor, the front and rear bearings are respectively designed on the inlet sides of the two-stage impellers, which facilitates the overall assembly and disassembly of the pump, the lengthened impeller inlet section and the increased bearing design play different roles in the pump inlet flow state, the balance of axial force and vibration noise, and the silent effect of the product is realized.

The present application belongs to the technical field of correction device, disclose a kind of gear box balancing correction device, rotating shaft is rigidly connected with sleeve in gear box, base is matched with sleeve air gap and installs excitation coil stator, double cup mouth opposite flexible gear is engaged by rigid gear ring in sleeve, eccentric block is arranged in flexible gear cup bottom, internal wave generator, wave generator is connected with rotating shaft by bearing and integrated energy transmission cylinder, and magnetic hysteresis rotor is arranged in the end of energy transmission cylinder;When working, double excitation coil stator independently generates rotating magnetic field, and independently angular deflection of wave generator is driven through air gap coupling, and the included angle of eccentric block is adjusted and controlled to synthesize reverse compensation centrifugal force to offset unbalanced vibration;Device structure is compact, control is accurate, transmission is stable, non-contact transmission improves high-speed reliability, solves the problem of redundant structure and insufficient precision of traditional device.

The invention discloses a turbofan engine fan unbalanced vibration fault self-healing regulation and control system and method. The turbofan engine fan unbalanced vibration fault self-healing regulation and control system comprises an online monitoring and diagnosis system, an intelligent control system and an unbalanced vibration self-healing regulation and control actuator which are in communication connection in sequence. The on-line monitoring and diagnosis system is used for carrying out real-time acquisition and characteristic analysis on vibration signals of a fan rotor of the turbofan engine so as to obtain the occurrence position of an unbalance fault; the intelligent control system is used for generating an optimal control instruction according to a diagnosis result of the online monitoring and diagnosis system based on a nonlinear active-disturbance-rejection control algorithm; the unbalanced vibration self-healing regulation and control actuator is installed on a fan rotor of the turbofan engine and used for receiving a control instruction of the intelligent control system and executing physical actions so as to adjust mass distribution of a fan rotor system in real time to achieve dynamic balance. The problem of poor timeliness existing in unbalanced vibration fault elimination is solved.

This invention relates to a pipeline elastic vibration damping support and its construction method, belonging to the field of pipeline vibration reduction technology. The pipeline elastic vibration damping support of this invention includes a load-bearing rod, two suspension rods, a pipeline support plate, and a spring damper. The upper ends of the two suspension rods are connected to the load-bearing rod, and the lower ends are fixedly connected to the pipeline support plate. The spring damper includes a base plate, an upper plate, two fixing bolts connecting the base plate and the upper plate, a lower spring assembly, an upper spring assembly, two connecting bolts, an upper clamping bolt, a lower clamping bolt, and an adjusting bolt. The pipeline support plate is clamped between the lower spring assembly and the upper spring assembly. This invention can balance vibration reduction and structural safety, and the spring damper structure of this invention can fix the pipeline support plate, enabling the suspension support to be smoothly installed while ensuring both vibration reduction effect and safety.

The invention discloses a rotor unbalance vibration reduction method based on oil film partition control, and relates to the field of high-speed flexible rotor vibration control, the vibration reduction method comprises the following steps: firstly detecting the vibration response and the rotating speed of a rotor system, and determining the eccentricity ratio and the precession angle of a rotor in an integrated squeeze film damper ISFD, and each squeeze film area; then analyzing the influence of the radial displacement of the oil film adjusting tiles in different oil film areas on the ISFD oil film force, and establishing a database of the radial displacement of the different oil film adjusting tiles and the ISFD oil film force; if the detected rotor vibration response is higher than the rotor target response, oil film force is adopted to suppress the rotor vibration response, and then the target radial displacement of each oil film adjusting tile is determined; and the radial movement of the oil film adjusting tiles is pushed, so that the actual radial displacement of each oil film adjusting tile is close to the target radial displacement, and the unbalanced vibration of the rotor is reduced. According to the vibration reduction method disclosed by the invention, the oil film force of the ISFD is actively changed, and the unbalanced vibration response of the rotor is rapidly inhibited.

The application relates to the technical field of motor control and discloses a bearing-free composite rotor cage-type asynchronous motor vibration real-time compensation control method, which comprises the following steps: collecting a rotor displacement signal and pre-processing the same to obtain a filtered displacement signal; processing the filtered displacement signal based on a second-order generalized integrator to extract a fundamental harmonic component synchronized with a rotor mechanical angular velocity; dynamically optimizing the amplitude weight and the phase weight of a compensation force by adopting a simplified LMS algorithm, and generating a feedforward compensation force according to the optimized weight; constructing a double-channel control framework to synthesize a total control force; and generating corresponding radial suspension forces by driving a suspension force winding through an inverter, so that the unbalanced vibration of the rotor is counteracted; the second-order generalized integrator harmonic observer is adopted to realize high-precision extraction of the fundamental frequency component, and a frequency self-adaptive adjustment mechanism is matched, so that the rotor mechanical angular velocity change can be tracked in real time.

The utility model discloses a shredded konjac lifting and conveying mechanism which comprises a support and is characterized in that an obliquely-arranged net chain conveying belt is arranged on the support, mounting frames are arranged on the left side and the right side of the net chain conveying belt respectively, the mounting frames are fixed to the support, and the front end and the rear end of the net chain conveying belt are wound around a front roller and a rear roller respectively. The front roller and the rear roller are rotatably arranged in the mounting frames, a motor is arranged right above the inclined high end of the net chain conveying belt, the motor is arranged on a mounting seat, the mounting seat is fixed on a portal frame, the portal frame is fixed on the mounting frames on the two sides, and the motor is in transmission connection with the front roller. According to the utility model, the lifting and conveying of the konjac shreds are realized, the draining is completed in the conveying process, the motor position is reasonably arranged, the vibration is balanced, and the influence on the conveying is reduced.

The utility model discloses a spiral adjusting seat device, which is arranged on the left side of the lower part of a vibration source and the right side of the lower part of a trough, comprises a main frame, a base, a pin shaft, a screw rod and a lifting sleeve, and is of a sealed structure, the pin shaft small bevel gear and the screw rod large bevel gear which are used for motion conversion, the copper nut and the lifting sleeve are arranged and installed in a cavity formed by the main frame and the base, the pin is rotated to drive the small bevel gear and the large bevel gear to be meshed and drive the copper nut and the screw rod to be in threaded fit, and rotation motion is converted into vertical up-and-down motion of the lifting sleeve. The angle of the vibration feeder is further adjusted through lifting of the top cover; meanwhile, a locking structure is arranged and matched with a locking nut and a cotter pin to lock the pin shaft, and reverse rotation is prevented; the damping structure is arranged, and the symmetrical supporting stand columns and damping springs are arranged between the main frame and the top cover, so that the damping and vibration balancing effects are achieved. All rotating parts of the spiral adjusting seat device are arranged in the base and the main frame, so that the spiral adjusting seat device is reliable to use; the torque is transmitted through the two bevel gears, and labor is saved during adjustment. Meanwhile, the height is directly adjusted by rotating the pin shaft, the vibration feeder does not need to be hoisted or supported, and convenience and flexibility are achieved.

The invention discloses a radial foil bearing with composite waveform foils, and belongs to the technical field of air foil bearings. The bearing comprises a bearing seat, a wave-shaped foil and a top-layer foil. The two ends of the wave-shaped foil are clamped in the axial clamping grooves of the bearing seat through the strip-shaped protrusions to be fixed, the middle portion of the wave-shaped foil makes contact with the inner wall of the bearing seat through the opposite horizontal sections, and the top-layer foil is supported through the wave-shaped protrusion sections. The first semi-arc length section and the second semi-arc length section at the two ends of the wave-shaped protruding section are connected through a suspended small wave band, damping can be introduced into the small wave band, and the vibration difference, caused by fixed constraint, between the two half waves of the connecting fixed end and the connecting bearing seat is balanced. Meanwhile, the top-layer foil is fixed in the clamping grooves through the strip-shaped protrusions of the top-layer foil. Through the symmetrical full-fixed structure, the bearing can adapt to positive and negative rotation of a main shaft, axial displacement of the top foil is effectively restrained, vibration and loads are balanced through small bands, the operation stability and bearing capacity of the bearing are remarkably improved, and the service life of the bearing is remarkably prolonged.