58results about How to "Reduce longitudinal vibration" patented technology

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 band saw machine includes a driving wheel and a driven wheel around which an endless band saw blade is wound. At least one of the driving wheel and the driven wheel is directly connected to an output shaft of a control motor. The output shaft of the control motor is arranged in a cylindrical bearing unit installed on a motor base supporting the control motor. The driving wheel is rotatably supported by the bearing unit.

The invention provides a road and bridge shock-absorbing support and an installation method thereof, which belong to the technical field of road and bridge shock-absorbing technology. The length direction of the groove is perpendicular to the length direction of the base. The shock absorber column is arranged in multiple grooves. The shock absorber column can move along the length direction and width direction of the groove. The shock absorber column is used to reduce road and bridge vibration. , the support plate is set on the upper end of multiple shock absorbers, and is used to transmit the vibration of the road bridge to multiple shock absorbers. The shock absorber is set on the support plate, and the shock absorber can slide on the support plate. The sliding direction of the shock absorber Parallel to the length direction of the base, the upper end of the shock absorber is connected to the road bridge, and the shock absorber is used to reduce the vibration of the road bridge. The road bridge shock-absorbing bearing and its installation method provided by the invention have the technical effects of being able to reduce various vibrations received by the road bridge, having good shock-absorbing performance of the road bridge and maintaining the stability of the road bridge.

The invention provides a method of adding TBM (tunnel boring machine) support cylinder magnetorheological dampers, is intended mainly to solve the problem that the existing full-face hard rock tunneling machine vibrates during tunneling, and is intended to relieve or decrease the damage due to severe vibrations of a main unit during operating. According to the technical scheme, magnetorheologicaldampers are added respectively between a top shield and a main drive, between a left upper shield and the main drive, between a right upper shield and the main drive, between a left shield and the main drive, and between a right shield and the main drive, so that longitudinal and transverse vibrations generated by the main unit during construction can be relieved, tunneling stability of the main unit can be improved, and better structural reliability and longer life can be imparted to the main unit.

An underwater acoustic projector comprising one or more cylindrical shell segments (8), each shell segment (8) having an even number of drivers (10) mounted therein, and the method of manufacturing said projector. The shell segments (8) preferably are formed with a longitudinal slot (14) and have arcuate segments (16), preferably of a dielectric material extending along the sides of the slot (14) for retaining the drivers (10) within the shell segments (8). The combined lengths of the driver is between 70% and 90% of the shell segment (8) length.

The invention discloses a main bearing cap of gas engine, which makes use of connection to connect various bearing caps together so as to form the whole main bearing cap. In the whole main bearing capthe rigidity of main bearing seat of die-casting body is improved greatly. Mechanical deformation, thermal deformation and portrait vibration of body are decreased. The rigidity of main bearing cap,coaxiality and Cylindricity of the hole of main bearing are improved at a great extent so as to improve the pressure-bearing ability of bearing and decrease the abrasion of friction pair. In addition,back oil seal seat is cast on the main bearing cap and a boss is cast on the lower of main bearing cap to install filtering so as to decrease the parts number of gas engine, decrease mechanical machining faces, decrease the production cost and improve the production efficiency.

The invention discloses a multi-chip band saw blade. The band saw blade comprises a saw blade body and saw teeth located on the saw blade body, 15 saw teeth arranged in sequence form a main tooth set,and each main tooth set comprises a first sub-tooth set, a second sub-tooth set, a third sub-tooth set, a fourth sub-tooth set and a fifth sub-tooth set; and each sub-tooth set comprises a first sawtooth, a second sawtooth and a third sawtooth which are arranged in sequence, the first sawtooth is a straight tooth, and the second sawtooth and the third sawtooth are separately a left dividing toothand right dividing tooth. By controlling the different heights of the teeth and controlling the tooth dividing amount, the tooth profile divides a chip into 18 chips during cutting, and the tooth profile can remarkably reduce cutting force in the cutting process and the cutting force in the saw cutting process; and the problems of oblique cutting, core digging, immovable cutting, intolerance to cutting and the like caused by excessive abrasion of tooth tips are avoided.

An elevator comprising a car frame (6) moving up and down in a hoistway (1), a car (5) installed in the car frame (6), and a guide for guiding the car frame (6) the lifting movement, the guide rail (2) that is arranged along the up and down direction, and via a plurality of car lower pulleys (4) that are arranged below the car frame (6), support the car frame ( 6) A sling (3) for lifting and lowering, wherein a dynamic shock absorber (10) moving up and down is provided below the car frame (6). Therefore, the vibration-absorbing device with a small structure for this elevator can not only effectively attenuate low-frequency longitudinal vibrations, but also can be accommodated within the external dimensions of the car frame.

The invention provides a road and bridge shock-proof support and a mounting method thereof, which belong to the technical field of road-bridge damping. The road and bridge shock-proof support comprises a base, shock-proof columns, a supporting plate and a shock-proof table. A plurality of grooves are formed in the length direction of the base; the length direction of the groove is perpendicular tothe length direction of the base; the shock-proof columns are arranged in the plurality of grooves; the shock-proof columns can move in the length direction and the width direction of the grooves; the shock-proof columns are used for reducing road and bridge shock; the supporting plate is arranged at the upper ends of the shock-proof columns and used for transmitting road and bridge shock to theshock-proof columns; the shock-proof table is arranged on the supporting plate and can slide on the supporting plate, the sliding direction of the shock-proof table is parallel to the length directionof the base, the upper end of the shock-proof table is connected with the road and bridge, and the shock-proof table is used for reducing road and bridge shock. The road and bridge shock-proof support and the mounting method thereof have the technical effects that various kinds of shock borne by a road and a bridge can be reduced, the road and bridge shock-proof performance is good, and the roadand the bridge are kept stable.

The invention discloses a synchronous belt supporting device. The synchronous belt supporting device comprises a lifting mechanism, a rotary mechanism, a telescopic mechanism and a supporting wheel, wherein the lifting mechanism, the rotary mechanism, the telescopic mechanism and the supporting wheel are arranged on a linear module, the rotary mechanism is installed on the lifting mechanism, the telescopic mechanism is installed on the rotary mechanism, and the supporting wheel is installed on the telescopic mechanism. According to the synchronous belt supporting device, the drooping of the synchronous belt can be effectively reduced.

The invention discloses a novel central buckle device of a suspension bridge, which comprises a cable clamp, an upper pulley of a sling, a double-strand sling, a shock absorbing frame, a lower pulley of a sling, a fixing device of a double-strand sling, a space type oblique rod, and viscous damping device and a space-type oblique rod fixing device; the cable clamp is fixed at the mid-span of the main cable of the suspension bridge, and the upper pulley of the sling and the upper end of the oblique rod are fixed to the cable clamp; A number of damping frames are provided; the viscous damper is fixed in the middle of the inclined rod. The invention reduces the longitudinal vibration of the short sling and prevents the anchor head of the sling from being damaged due to longitudinal reciprocating motion by passing the sling through the upper and lower pulleys to form a closed loop, setting a vibration damping frame, and setting a viscous damper on the inclined rod; The lateral vibration of the short sling is reduced by setting the space type oblique rod. The invention can be arranged in the mid-span of the suspension bridge, and is used for multi-directional vibration reduction of the mid-span and short suspension cables.