35results about How to "Increase frictional damping" patented technology

The invention discloses a high-effect dry friction damping spring vibration isolator and aims at providing a friction damping vibration isolator which is compact in structure, large in friction damp, high in load and good in environmental adaptation. According to the technical scheme, in a vibration environment, left friction pieces and right friction pieces of a disc-pressing upper cone spring (3) and a disc-pressing lower cone spring (6) perform reciprocating motion to axially extrude a right friction ring piece (4) and a left friction ring piece (9) on two sides, the left friction ring piece, the right friction ring piece, an upper guide umbrella disc (1) and a lower guide umbrella disc (5) are driven to perform constant friction motion on the inner wall of a housing (2), vibration mechanical energy is converted into heat energy so as to achieve vibration energy consumption and reduction. The high-effect dry friction damping spring vibration isolator utilizes low frequency of a conical spring and a damping characteristic of a symmetric semi-ring damping pad, can effectively inhibit spring fluctuation during high-frequency impact, also has composite multiple vibration isolation effect and has large damp under the low-frequency condition compared with a traditional rubber vibration isolator.

The invention relates to a variable friction damping vibration isolator with an adjustable central position, and belongs to the field of vibration isolators of electronic equipment. The problem that the vibration isolation capacity of the vibration isolator on a high-frequency vibrating load is weakened due to the fact that an existing vibration isolator cannot adjust the central position of variable friction damping, and when loaded actual weight is different from rated bearing capacity of the vibration isolator, the vibration center of the vibration isolator is deviated from the central position of low-friction damping force of a damping spring piece is solved. The variable friction damping vibration isolator comprises a base, a clamping spring, friction guide rails, an upper cover, a loading installation seat, friction pressure springs, friction heads and a main isolation spring; and the friction guide rails are matched with the clamping spring through a friction guide rail height adjustment conical surface, and the upper cover covers the friction guide rails. According to the variable friction damping vibration isolator with the adjustable central position, by adjusting pretightening force of the upper cover, the central positions of the friction guide rails can move up and down, and the central position of the variable friction damping vibration isolator is adjusted.

The invention discloses a lifting anti-rolling device for a container gantry crane. The lifting anti-rolling device comprises a hanger, a hanger upper frame arranged on the top end surface of the hanger and a crane arranged above the hanger upper frame, wherein a winding drum is arranged on the center of the top end of the crane; four steel wire ropes are wound on the winding drum; two first slide wheels are arranged at each of the two sides of the top end of the crane; two electric push rods are arranged at the bottom end of the crane; the two electric push rods are oppositely arranged; a steel wire rope fixing part is arranged on each electric push rod; second slide wheels are arranged on four top corners at the top end of the hanger upper frame; each second slide wheel is arranged in an inclined mode; the four second slide wheels are in one-to-one correspondence with four first slide wheels; and the trend of each steel wire rope is along the winding drum, the first slide wheels, the second slide wheels opposite to the first slide wheels, and the steel wire rope fixing parts of the electric push rods. According to the lifting anti-rolling device, needs on output torque of a speed reducer are reduced, rigid impact on a crane steel frame is reduced, and the service life of the crane is prolonged.

The disclosed seismic isolation bearing includes an upper base plate, a lower base plate, a disc bearing core, and at least one shear spring. The upper and lower base plates each have an upper surface and a lower surface. The disc bearing core is centrally positioned with respect to the planes of the upper and lower base plates and is in contact with the lower surface of the upper base plate and the upper surface of the lower base plate, where the disc bearing core allows the lower surface of the upper base plate to slide along the disc bearing core. The shear spring is coupled to the lower surface of the upper base plate and the upper surface of the lower base plate, deforms in shear upon lateral movement of the upper base plate relative to the lower base plate, and exerts a lateral return force on the upper base plate when laterally displaced.

The invention belongs to the technical field of an automobile and discloses a vibration isolator. The vibration isolator comprises a bottom plate, a friction assembly arranged on the bottom plate, a shell, a first reset piece and a second reset piece, wherein the bottom of the shell is arranged in the friction assembly in a sliding mode and can abut against the friction assembly, the first reset piece is arranged in the shell, two ends of the first reset piece abut against an inner wall of the shell and the bottom plate respectively, the second reset piece is arranged in the first reset pieceand connected with the first reset piece in parallel, and two ends of the second reset piece selectively abut against an inner wall of the shell and the bottom plate respectively. The vibration isolator is advantaged in that when high frequency and small load exist, the first reset piece provides rigidity needed by vibration attenuation, the small friction force between the friction assembly and the shell provides damping, rigidity and damping at the moment are small, and high-frequency vibration attenuation is facilitated; when an impact or large-load working condition is met, the two stagesof reset pieces act at the same time, rigidity of the system is improved, the shell can abut against the friction assembly, friction damping is increased, and the requirement for large-rigidity and large-damping isolation impact at low frequency is met.

The invention discloses a comb tooth self-cleaning type dustpan which comprises a dustpan hopper body, first comb teeth and a rotating beam are arranged on the dustpan hopper body, a cleaning part isarranged on the rotating beam, and the cleaning part can move along with the rotating beam and is inserted into gaps between racks of the first comb teeth or disengaged from the gaps. The dustpan notonly can automatically clean hair, fibers and other silks adhered to the comb teeth, but also can be naturally realized in the dustpan operation process, and no special cleaning action is needed, so that the use is more convenient.

The invention discloses a mechanical pressure sensing and locking safety device which comprises an inductive head, a locking mechanism and a guide sleeve. Two ends of the guide sleeve are respectively provided with a guide hole, a latch rod is inserted into the guide sleeve through the guide holes, the inductive head is connected to the guide sleeve and matched with the guide sleeve to form a mounting space, the locking mechanism is arranged in the mounting space and connected with the inductive head and the latch rod, and the inductive head and the locking mechanism control axial locking and unlocking of the latch rod in a matched manner. The mechanical pressure sensing and locking safety device has the advantages that the device is compact in structure, reliable in action execution, convenient to mount, applicable to occasions with sanitary and anti-explosion requirements and passive sites, high in safety and sensitive in response, and can be automatically locked and unlocked.

The invention belongs to the technical field of mechanical equipment, and in particular relates to a flexible assembly and a dynamic pressure radial gas bearing. The variable range of stiffness is limited due to the fact that in a traditional foil bearing structure, the wave foil arch bottom only contacts with the upper surface of a bearing seat in one direction; and at the same time, the effect of friction damping on energy dissipation is poor due to the fact that the space of a wave foil bearing structure is not fully utilized. The flexible assembly comprises a first foil group and a secondfoil group, the first foil group intersects with the second foil group, and the space phase of the first foil group is opposite to the space phase of the second foil group; and the flexible assembly is provided higher structural damping. According to the dynamic pressure radial gas bearing, by adopting the flexible assembly, the limited working space of the foil bearing is fully utilized, the contact area among the flexible assembly and the flat foil surface and the bearing seat surface is increased, bearing friction damping is improved, thus energy dissipation in the bearing is enhanced, andthe stability of a rotor-bearing system is effectively maintained.

The invention discloses a double-brake back-and-forth controllable descent control device. The double-brake back-and-forth controllable descent control device comprises an outer shell, a pulling mechanism, a double-brake mechanism and a rope guiding mechanism, wherein the pulling mechanism, the double-brake mechanism and the rope guiding mechanism are arranged in the outer shell; the pulling mechanism is mutually linked with the double-brake mechanism and comprises an energy conversion regulating screw rod and a buffer piece which is arranged at the periphery of the pulling mechanism; the double-brake mechanism comprises an outer brake assembly, an inner brake assembly and a self locking mechanism, the inner brake assembly is mutually linked with the energy conversion regulating screw rod of the pulling mechanism, a wedge wheel is arranged at the periphery of the inner brake assembly, a steel wire rope is wound on the wedge wheel and is in rolling friction, and the self locking mechanism is movably arranged between the outer brake assembly and the outer shell in a leaning way; when the outer brake assembly is in an unstressed state or a maximum stress state, the inner brake assembly is in a semi-brake state to generate friction damping, and the steel wire rope wound on the peripheral wedge wheel can be tensioned and locked; when the outer brake assembly is in a semi-clutch state, the inner brake assembly and a brake hub are in a friction state by the locking of the inner brake assembly on the steel wire rope, the steel wire rope is enabled to be guided out along the rope guiding mechanism by friction force difference, and slow and uniform-speed descending can be realized.

A method and system for increasing damping capacity in cast metal parts by utilizing dry friction between individual wires of a sheathed rope is disclosed. The rope is embedded into the part during casting. Sheathing the ropes in a thin layer of the same metal as the casting prevents molten metal from infiltrating individual wires during casting, thus allowing inter-wire friction during the part vibration. There are two ways to distribute the ropes within a part during casting. The first way is to distribute the ropes uniformly across an entire part whereby damping capacity of the metal part increases uniformly as well. The second way of distributing the ropes is to spatially distribute them according to a pattern to increase the damping capacity only in the part regions that have the highest vibration amplitudes or stress during system vibration. Both methods of distribution may be combined in a single part.

A method and system for increasing damping capacity utilizing dry friction between individual wires of a rope embedded in a component formed from a composite is illustrated. The individual wires allow inter-wire friction to occur during part vibration. The component includes a body that is a molded matrix formed form a composite material. The body may be of any material selected from the group consisting of a polymer, a metal or a ceramic material. One or more vibration-damping ropes are embedded in the body. The vibration-damping ropes may be elongated segments or may be a rope having connected ends that form one or more rings. Each vibration-damping rope includes an outer layer of wires that surrounds a plurality of inner wires. Inflowing composite material is prevented from passing by the outer layer of wires and into the inner wires during the manufacturing process, thereby forming voids between the inner wires.

The light metal high-strength pure electric bus composite structure comprises an active connecting section and a passive connecting section, the active connecting section and the passive connecting section are each of a hollow pipe structure, sandwich cores are arranged in the active connecting section and the passive connecting section, the end of the active connecting section is provided with an outward expansion section expanding outwards, and the end of the passive connecting section is provided with a hollow pipe. An outer lantern ring with the inner diameter equal to the outer diameter of the passive connecting section is arranged at the free end of the outer expansion section, an inner shrinkage section which shrinks inwards and is matched with the outer expansion section is arranged at the end of the passive connecting section, an inner lantern ring with the outer diameter equal to the inner diameter of the active connecting section is arranged at the free end of the inner shrinkage section, and the side wall of the outer lantern ring is cut and folded inwards to form a plurality of clamping strips. Clamping grooves in one-to-one correspondence with the clamping strips are inwards formed in the two ends of the passive connecting section and the inward shrinkage sections at the two ends. The active connection section and the passive connection section are connected through magnetic pulses. The simple cavity is adopted as the framework, and the advantages of being simple in structure, low in cost, high in design efficiency, good in lightweight effect and the like are achieved.