130results about How to "Reduce lateral vibration" patented technology

A downhole assembly for insertion into a borehole comprising an articulated mandrel, a passive and an active damping mechanism operating on said mandrel for exercising control over torsional stick-slip and further proposing an improvement over the prior art which diminishes lateral shock.

Drilling systems and methods for enlarging a borehole that include at least one expandable reamer and at least one expandable stabilizer axially spaced therefrom in a tubular string, such as a drill string, the at least one expandable reamer and the at least one expandable stabilizer being independently actuatable by different-sized actuation devices. A relatively lower tool is actuatable by a smaller actuation device, such as a drop ball, which passes through a relatively higher tool in the drill string without triggering the higher tool.

Drilling systems and methods for enlarging a borehole that include an expandable reamer and an expandable stabilizer axially coupled above the expandable reamer are disclosed. The expandable reamer includes a tubular body having a longitudinal axis and a drilling fluid flow path therethrough, a plurality of generally radially and longitudinally extending blades carried by the tubular body, and a cutting structure carried by at least one blade of the plurality of blades, wherein at least one blade of the plurality of blades is movable outwardly with respect to the longitudinal axis. The expandable stabilizer includes a tubular body having a longitudinal axis and a drilling fluid flow path therethrough, a plurality of generally radially and longitudinally extending bearing pads carried by the tubular body, wherein at least one bearing pad of the plurality of bearing pads includes an up-hole cutting structure carried thereupon and is movable outwardly with respect to the longitudinal axis.

A holding cap (RC) is mounted on a terminal holding portion (51) of a female housing (5) from the front, and a tubular cover (52) is so formed outward of the terminal holding portion (51) to surround the holding cap (RC). First shake preventing portions (RC3) project radially out from the outer surface of the front end of the holding cap (RC) and second shake preventing portions (52a) project in at the rear end of the inner surface of the cover (52). When male and female connectors (1, 4) are connected with each other, the first and second shake preventing portions (RC3, 52a) both contact a receptacle (21) of a male housing (2) to reduce the shaking between both housings (2, 5) in transverse directions.

The invention discloses a building anti-seismic crane support and a using method thereof, and relates to the field of building anti-seismic crane supports. The invention particularly relates to the building anti-seismic crane support and the using method thereof, aiming at the problems that in an existing device, only one damping structure is arranged, the damping effect is not ideal, the stability of the device is not firm, the use is not safe and reassurance, the design is not reasonable and the like, the following scheme is provided at present, building anti-seismic crane support comprisesa stand column, the lower surface of the stand column is fixedly connected with a connecting base, the lower surface of the connecting base is fixedly connected with a connector, one end of the connector is rotationally connected with a supporting rod, the upper end of the supporting rod is rotationally connected with a mounting head, the lower surface of the connector is fixedly connected with asupporting column, a damping base is fixedly connected to the side wall of one side of the supporting column, and a hollow structure is arranged inside the damping base. According to the invention, multiple damping structures are arranged, so that the damping effect is more ideal, the stability is good, the use is safe and reassurance, the design is reasonable, the installation is convenient, andthe use is convenient.

A system and method reduce lateral movement of a car in an elevator system by detecting vibration of the car as a vibration signal. A damping coefficient for a feedback signal is determined according to the vibration signal and a state of the elevator system. A semi-active actuator is arranged between the car and a roller guide assembly. The semi-active actuator includes a rheological fluid, and flow characteristics of the rheological fluid are actuated according to the feedback signal to reduce the lateral movement of the car.

The present invention relates to a compressor in which a rotary member (130) suspended on a stationary member (140) is rotated to compress the refrigerant. The rotary member (130) is suspended on a first portion of the stationary member and rotatably supported on a second portion of the stationary member, which is spaced a distance the first portion of the stationary member to thereby achieve structural stability, improve operational reliability and reduce vibrations. The components can be easily centered and assembled with excellent assembly characteristics. In addition, the mounting structure of an elastically-supported vane (133) is improved to ensure lubrication performance and operational reliability. Moreover, a mounting structure for a vane (234), which incorporates a roller(233), is improved to reduce vibration and prevent refrigerant leakage, which leads to high compression efficiency.