30results about How to "Suppression of torsional vibration" patented technology

Disclosed is a means to attenuate torsional vibration in a power unit transmission system generated by torque fluctuations in the engine in an automotive hybrid power unit, and thereby eliminate noise, such as chattering from the power transmission gears and muffled body noise, etc. Disclosed is a hybrid power unit control system for a hybrid power unit that is equipped with a first drive train, which is configured with a gear transmission mechanism linked to a first input shaft that transmits engine drive power via a first friction clutch; a second drive train, which is configured with a gear transmission mechanism linked to a second input shaft that transmits engine drive power via a second friction clutch; a motor generator, which is connected to said first input shaft or second input shaft; and a driven apparatus, which is driven by the drive power transmitted from the output shaft of the gear transmission mechanism of said first drive train or the output shaft of the gear transmission mechanism of said second drive train. Said motor generator is started as an electric power generator when fluctuation in the rotational speed of said engine, which is detected by a rotational speed sensor, exceeds a predetermined upper limit amplitude value, so that torque of opposite phase to said rotational speed fluctuation is applied to said engine with the same periodicity as said rotational speed fluctuation.

The invention relates to a damper device for inhibiting torsional vibration of an engine in a broad range. A damper device (11) is provided between the engine (12) and a transmission (13) and has a torque distribution mechanism (20) that is provided with a bracket C connected to the engine (12), a first gear ring (R1) connected to the engine (12) via a first elastic member (22), a sun gear S connected to the transmission (13), and a second gear ring (R2) connected to the transmission (13) via a second elastic member (24). The damper device (11) further has a first clutch (CL1) that is provided between the sun gear (S) and the transmission (13) that is switched between an engaged state of connecting the sun gear (S) and the transmission (13) and a released state of disconnecting the sun gear (S) from the transmission (13) and a second clutch (CL2) that is provided between the second gear ring (R2) and the transmission (13) and that is switched between an engaged state of connecting the second gear ring (R2) to the transmission (13) and a released state of disconnecting the second gear ring (R2) from the transmission.

The invention relates to a method for damping torsional vibrations in a power generation plant (100). The power generation plant (100) is equipped with a drive train (2-5), a rotor (1), which is fitted at a rotor-side end (1') of the drive train (2-5), and a generator (6), which is driven via the drive train (2-5) and is fitted at a generator-side end (6') of the drive train (2-5), wherein an angular difference between a first point (1') and a second point (6') on the drive train (2-5) is determined over time and, on the basis of the time profile of the determined angular difference, torsional vibrations in the drive train (2-5) are damped by correspondingly presetting a load torque (MG) of the generator and a drive torque (MA) of the rotor (1).

A resonator element inhibiting an unwanted vibration such as a torsional vibration from occurring and having a high Q-value, an electronic device, an electronic apparatus, and a moving object each equipped with the resonator element are provided. The resonator element is provided with a base section, a vibrating arm extending from the base section, and a groove section having a groove with a bottom formed from a first principal surface of the vibrating arm toward a second principal surface on an opposite side to the first principal surface, and is further provided with a mass section disposed on at least a part of the second principal surface.

The invention relates to the technical field of vibration isolation buffering, in particular to a vibration isolation platform free of angular displacement. The vibration isolation platform comprisesa lower connecting plate, a metal rubber vibration isolator assembly, an anti-torsion assembly, an upper connecting plate and a transverse vibration isolation assembly; and the anti-torsion assembly is composed of a plurality of guide rail and sliding block combinations which are arranged in three spatially orthogonal directions and surround the outer side of the upper connecting plate. The anti-torsion component can restrain three torsion degrees of freedom, and meanwhile, the metal rubber vibration isolator assembly and the transverse vibration isolation assembly can isolate vibration in three directions horizontally and vertically, so that three-way vibration isolation free of the angular displacement of the vibration isolation platform is achieved.

The invention discloses a damping device and an engine system, belonging to the technical field of damping. The shock absorbing device of the present invention includes a casing and a transmission shaft, the casing is used to connect with the rotating drive and the inner wall of the casing is provided with a plurality of internal convex teeth along the circumference; the transmission shaft is passed through the casing, and the outer wall of the transmission shaft is A plurality of outer convex teeth are arranged in the direction, and the outer convex teeth and the inner convex teeth are alternately distributed, and rubber shock absorbers are arranged between the adjacent outer convex teeth and the inner convex teeth. When the flywheel drives the casing to rotate, the inner convex teeth on the casing turn the drive shaft through the rubber shock absorber, and the drive shaft drives the subsequent transmission system to rotate. The elastic damping of the rubber shock absorber can change the rigid impact into elastic impact, Realize shock absorption; and the stiffness of the rubber shock absorber is easy to control, and the stiffness of the rubber shock absorber is smaller, which can more effectively consume the vibration energy in the form of heat energy, thereby suppressing torsional vibration and avoiding the vibration of the whole machine to the greatest extent. Natural frequency, good shock absorption effect.

The invention discloses a torsional vibration reduction device based on a hydraulic damping cam. The torsional vibration reduction device comprises a flange, a central cam, cam pushing rods, a spline shaft, arc-shaped pushing rods, direction control windows, pressure reduction windows, a ring-shaped oil groove, arc-shaped oil cylinders, a sealing cover and the like, wherein the sealing cover is arranged on one side of the flange; the sealing cover and the flange are connected through screws, and then an enclosed space comprising the pressure reduction windows and the direction control windows is formed; the enclosed space is fully filled with an oil liquid; the spline shaft and the central cam are in interference fit with each other and connected into a whole; the whole of the spline shaft and the central cam is matched and connected with the flange; the spline shaft is connected with a main transmission shaft; the central cam is driven by the main transmission shaft to rotate; through the translation of the cam pushing rods, the arc-shaped pushing rods are driven to rotate in the arc-shaped oil cylinders; the oil liquid is extruded and enters the pressure reduction windows for pressure reduction; the flowing direction of the oil liquid is controlled through the direction control windows; the oil liquid flows in the ring-shaped oil groove on the periphery of the flange; and through further pressure reduction at damping holes, the torsional force is reduced. The torsional vibration reduction device disclosed by the invention has the advantages that the transmission is smooth and steady; the speed is high; the mechanical energy is converted into the hydraulic energy; and the vibration reduction effect is good.

The invention discloses a torsional vibration absorber unit and the absorber based on bistable origami. The vibration absorber is composed of a plurality of torsional vibration vibration absorber units arranged periodically, and the vibration absorber unit includes a Kresling vibrator and two asymmetrically arranged mass blocks, and the mass blocks are asymmetrically arranged on the top surface of the Kresling vibrator; The upper and lower bases of the Kresling oscillator are regular n polygons, where n is an even number, and the height of the Kresling oscillator is greater than the radius of the circumscribed circle of the regular n polygon, and the Kresling oscillator has a bistable state. The structure of the present invention is simple, and can switch between two stable states according to the actual situation, thereby adjusting the vibration frequency to be suppressed. Moreover, due to the asymmetric arrangement of the structure of the present invention, the vibrator is sensitive to torsional vibration, which can produce obvious Torsional vibration suppression effect.

The invention discloses a variable-inertia and variable-damping torsion damper. The variable-inertia and variable-damping torsion damper comprises a variable-inertia assembly and a variable-damping assembly; the variable-inertia assembly comprises a left end disk, a right end cover, an inner iron core, a permanent magnet, an inner coil and variable-mass-distribution ferrofluid; and the inner coil and the permanent magnet are combined to generate a magnetic field to change the distribution and the magnitude of a magnetic field at the position of the ferrofluid, and the magnitude of rotating inertia of the variable-inertia assembly is continuously adjusted. The variable-inertia and variable-damping torsion damper can independently serve as a front end torsion damper of an internal combustion engine and can also serve as a secondary flywheel of a dual-mass flywheel to be connected with a clutch; the transmission system damping and the rotating inertia can be adjusted in a self-adaptive manner according to requirements of a control algorithm; and torsion vibration of a transmission system is effectively inhibited. The variable-inertia and variable-damping torsion damper has the beneficial effects that the structure is compact, output damping torque is large, the rotating inertia adjustment range is wide, and the dynamic response is fast; and the fuel oil economy of the internal combustion engine can be improved easily, and the variable-inertia and variable-damping torsion damper can also be applied in a zero-gravity environment of the aerospace and thus has wide application prospects in rotating type mechanical devices.

The invention relates to a multi-degree-of-freedom cantilever beam type broadband vibration absorber. The multi-degree-of-freedom cantilever beam type broadband vibration absorber comprises a mountingbase and a plurality of vibration absorption units, wherein the plurality of vibration absorption units are uniformly arranged on the outer periphery of the mounting base; and the base is connected to an absorbed vibration device, the inherent frequency of each vibration absorption unit is fi, the vibration frequency of the absorbed vibration device is f0, wherein f0-2Hz is smaller than or equalto fi, and fi is smaller than or equal to f0+2Hz. According to the multi-degree-of-freedom cantilever beam type broadband vibration absorber, the vibration absorption units with multiple frequencies are processed into an annular whole through the vibration absorber, the effective vibration absorption bandwidth is obviously improved, meanwhile, due to the fact that the mounting base is shared, theproportion of invalid quality is reduced; at the same time, the vibration absorption units are arranged in a circumferential direction, the two-dimensional vibration absorption capacity in the plane is achieved, and torsional vibration can be effectively inhibited; and the relation between the inherent frequency of the vibration absorption units and the vibration frequency of the absorbed vibration device is set, the vibration absorption bandwidth can be expanded while the vibration absorption efficiency is guaranteed, so that the requirements of more vibration absorption directions can be met.

The invention discloses a control system of dynamic deceleration and torsional to inhibit the driving system of rolling mill in the rolling mill driving control domain, which comprises the following parts: two-quality elastic driving system of rolling mill, control system and power variable-flow system, wherein two-quality elastic driving system of rolling mill contains rolling mill and roller to connect by connection axle; the control system contains load observer, state feedback gain amplifier and motor speed-adjusting system; the power variable-flow system is electric power electronic transformer, which transforms the electrical network voltage and current into fitful motor voltage and current to drive the motor speed-adjusting operation according to the control pressure.

The invention discloses a method for reducing the vibration and the noise of a permanent-magnet motor, comprising the following steps of: (1) initially selecting a magnetic pole number and a tooth socket number according to application occasions; (2) judging the stress and vibration states of the permanent-magnet motor, wherein the permanent-magnet motor generates torque pulsation if a phase tuning factor ks=0 is solved according to a formula: ks=mod (lsNs / Nm) and km=0 is solved according to a formula: km=mod (lsNm / Ns), the permanent-magnet motor generates unbalanced magnetic pull if the phase tuning factor ks=1 or Nm-1 and km=1 or Ns-1, and the permanent-magnet motor is in a stress balance state if ks=2, 3, 4 to Nm-2 and km=2, 3, 4 to Ns-2; and (3) repeating calculation formulas of the corresponding stress and vibration states in the step (2) to select the sum of the magnetic pole number and the tooth socket number. The method can be used for selecting different parameters aiming at different occasions according to the mapping relation between the magnetic pole number and the tooth socket number of the permanent-magnet motor and the vibration and noise characteristics of the permanent-magnet motor, thereby realizing the vibration reduction and / or the noise reduction of the permanent-magnet motor.

The invention is a torsional impact drilling acceleration tool. The torsional impact drilling acceleration tool includes a shell body, the shell body is internally provided with a shell center hole, adrill bit seat is arranged at the other end of the shell boy, the drill bit seat is internally provided with a drill bit seat center hole, and a drill bit can be sleeved with the end, away from the shell body, of the drill bit seat center hole in a sealing mode. A driving shaft is coaxially sleeved with the shell center hole, the driving shaft is internally provided with a driving shaft center hole which is formed in the axial direction in a penetrating mode, and one end of the driving shaft is arranged in the drill bit seat center hole in a penetrating mode. A circumferential impact structure is arranged on the outer wall of one end of the driving shaft in a sleeving mode, the circumferential impact structure can produce circumferential reciprocating impact and is fixed in the axial direction, the circumferential impact structure is internally provided with a circumferential impact structure center hole which is formed in the axial direction in a penetrating mode, and the circumferential impact structure center hole and the driving shaft center hole can be formed in a communicating mode. The torsional impact drilling acceleration tool is simple in structure and long in service life, the cutting state of the drill bit can be improved, the service life of the drill bit is prolonged, and the efficiency of breaking rock by the drill bit is improved.