32results about How to "Reduce abnormal vibration" patented technology

The invention provides a dynamic vibration absorber for an industrial pipeline. The dynamic vibration absorber comprises two brackets and two mass blocks. The two brackets can be symmetrically clamped on the outer wall of the pipeline, and can be butted and fixed. The two mass blocks are respectively and detachably mounted on the two brackets. When the pipeline vibrates, the dynamic vibration absorber for the industrial pipeline is driven to vibrate, and an inertia force generated due to the vibration of the dynamic vibration absorber for the industrial pipeline reacts on the pipeline, so as to achieve the effect of effectively inhibiting the vibration of the pipeline. When the dynamic vibration absorber for the industrial pipeline is mounted, proper mass blocks are selected according to the vibration characteristics of the pipeline, and through the adjustment of the weights of the mass blocks, the optimal vibration absorption effect of the pipeline is achieved, and the vibration absorption purpose of the pipeline is achieved.

The invention discloses an inertial flywheel device adjustable in rotational inertia and capable of achieving automatic carlibaration. An annular bulge on a flywheel shaft is hollowly sleeved with themiddle of a flywheel disc, two lead screws which are symmetrical to each other around a center axis of the flywheel disc are radially arranged at one axial side of the flywheel disc, the inner end ofeach lead screw is provided with a small bevel gear at the inner side of the annular bulge, a mass block is assembled on each lead screw at the outer side of the annular bulge, and a bevel gear discis provided with conical teeth capable of being meshed with the two small bevel gears; the flywheel shaft is fixedly sleeved with an intermediate body, the intermediate body extends into a radial blind hole formed in the inner wall of the annular bulge through positioning columns with gaps, each positioning column is sleeved with a spiral spring, the other axial side surface of the flywheel disc is provided with two flywheel disc hinge bases, a mass adjusting block is hinged to each flywheel disc hinge base through a short connecting rod, and an intermediate body hinge base is hinged to each mass adjusting block through a long connecting rod; the magnitude of the rotational inertia can be continuously changed, and the uneven mass of a flywheel can be automatically sensed and adjusted.

The invention relates to a hydraulic cutting system of a cutting machine. The hydraulic cutting system of the cutting machine comprises an oil pump, the input end of the oil pump is connected with an oil tank, the output end of the oil pump is connected with the input end of an oil filter, and the output end of the oil filter is connected with the input end of a check valve. The hydraulic cutting system of the cutting machine is characterized in that the output end of the check valve is connected with an energy accumulator, an overflow valve, a first pressure relay, a second pressure relay, a third pressure relay, a first reversing valve and a second reversing valve, and the oil outlet of the second reversing valve is connected with a hydraulic clutch of the cutting machine. A stop valve is arranged between the overflow valve and the energy accumulator. The oil return opening of the first reversing valve and the oil return opening of the second reversing valve are connected with the oil tank. The third pressure relay is connected with a pressure gage and a pressure gage switch. One end of the overflow valve is connected with the output end of the check valve, and the other end of the overflow valve is connected into the oil tank. The power input end of the oil pump is connected with a motor. According to the hydraulic cutting system of the cutting machine, idle consumption heating of the hydraulic system is reduced, the viscosity performance of oil is ensured, and the service life of the oil is prolonged.

The invention provides a transmission system torsional vibration reducing method and application thereof. The method is characterized in that a torsional vibration damper, which is a tuned rotary inertia damper, is added on a transmission shaft in a parallel connection manner, and the torsional rotation movement around the transmission shaft is used for reducing the vibration level of a certain first order torsional mode frequency. The method is flexible, can effectively reduce vibration without damage to the original structure of the transmission system, and can be used for later repair of the transmission system. The method can be applied to wind energy / tidal current energy generator sets; the torsional vibration damper is installed on a shaft, connected with a generator, of a high speed shaft coupler to greatly reduce a first-order mode component in the torsional vibration, so that a transmission system can operate more stably, the reliability of the structure can be improved and the service life can be prolonged.

The invention discloses a determining method and device for a rotor phase of a compressor and the compressor. The method comprises the following steps: acquiring an accelerated speed course response signal of a welding spot of the compressor; processing the accelerated speed course response signal to extract a time domain operation signal, at a predetermined moment, of a rotor system of the compressor; constructing a relation curve I which corresponds to a relationship between a motion space angle of a rotor and time according to the time domain operation signal, wherein the rotor is a rotor corresponding to the rotor system; obtaining a relation curve II which corresponds to a relationship between fluctuation rotation speed of the rotor and time according to the relation curve I; obtaining a relation curve II which corresponds to a relationship between the fluctuation rotation speed of the rotor and the motion space angle of the rotor according to the relation curve II; and determining the phase of the rotor of the compressor according to the relation curve III. The determining method solves the technical problem that the compressor is easily caused to vibrate abnormally as a result of inaccurate torque compensation on the compressor if a way of obtaining the phase of the rotor of the compressor in the prior art is lower in reliability.

The present invention relates to a clutch and a compressor comprising the same, and provides a compressor which operates with low noise and low vibration by reducing an amplitude of vibration transmitted in the axial direction of a clutch.

A unit for preventing reverse rotation of vortex compressor, which has a rotary shaft with moving vortex disk, the compression unit composed of moving and static vortex disks, power generating unit, lubricating unit and reverse rotation preventer, features that it is arranged on main frame and moving vortex disk. When said moving vortex is going to rotate reverse, an elastic limiting pin moves upward and is hooked by a slot only main frame, so preventing the reverse rotation of moving vortex disk.

In a pneumatic tire composed of a carcass layer crossing between a pair of left and right bead cores, the bead cores comprise a fastening bead core for fastening an end of the carcass layer to be turned up around the fastening bead core, and a non-fastening bead core free from the end of the carcass layer. An inner circumferential radius R2 of the non-fastening bead core is set smaller than an inner circumferential radius R1 of the end of the carcass layer to be turned up around the fastening bead core.

An ultrasonic actuated unit includes an ultrasonic transmitting portion extending along a longitudinal axis and transmitting an ultrasonic vibration, an intermediary portion continuous with the ultrasonic transmitting portion or connected to the ultrasonic transmitting portion at a node position of a longitudinal vibration, and a noncontact vibrating portion extending in directions parallel to a longitudinal axis without contacting the ultrasonic transmitting portion, an imprecise vibration being transmitted to the noncontact vibrating portion from the ultrasonic transmitting portion via the intermediary portion, the noncontact vibrating portion transmitting the imprecise vibration. The ultrasonic actuated unit includes a vibration absorbing portion absorbing the imprecise vibration transmitted to the noncontact vibrating portion.

A damper for automobile transmission shafts comprises a damping body and an inner ring in the damping body; and the inner ring is provided with cavities in which rubber is filled. The damper ensures that the rubber is firmly integrated with the inner ring, so that the inner ring is prevented from being separated from the rubber layer due to the failure of adhesive or the unreliable adhesion of the rubber layer, and thereby the damper can effectively reduce the abnormal vibration of an automobile transmission shaft. The structure of the damper is simple and compact, integrated and standardized design and production are convenient, and the mounting space can be reduced. When the damper is produced, in the process of vulcanization, adhesive does not need to be applied, sand blasting is not needed, consequently, the production process is simplified, and the production efficiency is increased; meanwhile, since adhesive does not need to be used, the health of operators is prevented from being harmed, and environment pollution is prevented as well.

The invention provides a method of regulating and controlling the air volume of a sintering machine by using a main ventilation valve and the rotating speed in a combined mode, and belongs to the field of metallurgical production. The opening degree of an inlet baffle of a draught fan is regulated to 14%-65%, and the rotating speed of the draught fan is regulated to 700-1000rpm. By means of the method, the temperature of sintering flue gas can be effectively stabilized, the frequency of abnormal vibration, caused by the excess temperature of the flue gas, of a main ventilation draught fan is reduced, and threats to operation of a flue gas desulfurization and denitrification system caused by the excess temperature of the flue gas can be reduced.