32results about How to "Improve vibration control effect" patented technology

The present invention provides a vacuum pump capable of suppressing the structure from becoming complicated and improving the damping effect. The vacuum pump includes: a holding mechanism for clamping an outer race of the ball bearing in an axial direction and holding the outer race so that the outer race moves along a radial direction; and an elastic member disposed at an outer circumferential side of the outer race. The elastic member is disposed in contact with or close to the outer circumferential side of the outer race. Oil or grease is injected into a gap between the elastic member and the outer race. Through holding the outer race against the elastic member, the elastic member is deformed to suppress vibration. Furthermore, through injecting oil or grease into the gap, the damping effect can be further improved.

A self-adapting vibration reduction method and a magnetic rheology damper which has integration relative velocity conversion function. The damper is made up of cylinder body, magnetic rheology liquid, exciting coil on the piston head, induction coil in the piston rod, accumulator, and dirt shroud, and so on; the exciting coil and the induction coil are constituted a active magnetoelectricity type relative velocity transducer, it integrates the magnetic rheology damper structure to a unit. Its vibration reduction method is that exciting coil is loaded a medium-low frequency voltage sign as the transducer's exciting coil detection signal, common frequency alternating magnetic field which is produced by the method is formed to a closure work magnetic loop in the damper structure; axial direction relative motion between the piston of magnetic rheology damper and cylinder body make magnetic linkage of the induction coil occur to correspond change and induced obtain conversion output signal which reflects the axial direction relative motion; according to the conversion signal, controller self-adapting adjusts the drive current which is overlap on the exciting coil by current drive to control the magnetic field strength of the exciting coil to realize the self-adapting vibration reduction of the magnetic rheology.

The invention relates to a tuned mass damper for controlling tri-dimensional translation and horizontal torsion of a building structure and a manufacturing method thereof, belonging to the technical field of structural engineering seismic resistance and shock absorption. The damper comprises two tuned mass blocks which move along the two horizontal axis directions of the building structure, horizontal viscous dampers connected with the tuned mass blocks, universal rolling spherical hinges arranged at the bottom of the tuned mass blocks, limit baffles connected with the horizontal viscous dampers, horizontal clapboards, torsion mass blocks, torsional levers, torsion shafts, torsion fixed shafts, torsional damper springs and vertical viscous dampers arranged at the bottom of the horizontal clapboards. The tuned mass damper for controlling tri-dimensional translation and horizontal torsion of a building structure can perform tuned energy dissipation shock absorption in the two horizontal directions, vertical direction and horizontal torsional direction of the building structure.

The invention relates to a built-in micro-particle type tuning and friction energy dissipation damper, belonging to the field of structural engineering earthquake proofing and damping and wind resistance technology, and comprising that: a box body connected with a building structure floor member or a beam column member, damping particles placed in the box body, an internal clapboard and a connecting member of the box body; the damping particles are evenly stacked in a space formed by the box body, the internal clapboard and the connecting member in appropriate volume according to actual conditions; under the action of wind or earthquake, the whole box body can tune the natural vibration characteristic of the structure, and multidimensional vibration, friction and collision can fully occurbetween each damping particle as well as between the damping particles and the internal clapboard. The built-in micro-particle type tuning and friction energy dissipation damper of the invention has simple construction, convenient installation and adjustment, agile reaction and functions of multidimensional tuning damping and friction and collision damping, and can effectively reduce the reactionof the original structure under the dynamic action of wind or / and earthquake and the destructiveness of the original structure.