32results about How to "Good damping function" patented technology

The invention discloses a high-damping self-compaction concrete which is composed of P.O42.5 ordinary Portland cement, composite reinforcing powder, emulsified asphalt, polycarboxylic acid high efficiency water reducing agent, mixing water, composite deformation component, II-zone grade river sand with the fineness modulus of 2.6-3.0, and limestone gravel with the particle size of 5-20mm. Every cubic meter of concrete comprises the following components in parts by mass: 16 parts of cement, 7.8 parts of composite reinforcing powder, 0.8-1.0 part of emulsified asphalt, 7.5 parts of mixing water, 0.22-0.27 part of water reducer, 1.6-1.7 parts of composite deformation component, 29-30 parts of river sand and 36-37 parts of limestone gravel. The high-damping self-compaction concrete has the advantages of excellent damping function, excellent shock resistance, higher mechanical strength, low elastic modulus and obvious technical and economical effects, and especially can effectively improve the service behavior and service life of basic structures subjected to impact, vibration and other repeated mobile load actions, such as high-speed railway track structures, bridge structures and other engineering structures.

An in-ear headphone (1) comprising an elastic sealing part (2) and a solid sealing part (3) for sealing an ear cavity (b) against an outside region (c) is disclosed, wherein said solid sealing part (3) comprises at least one damping vent (4) interconnecting the ear cavity (b) and the outside region (c), and wherein said damping vent (4) forms an acoustic friction.

The invention describes a metal mesh plate damping composite material and a manufacturing method thereof. The composite material comprises a metal mesh composite plate compounding one or more layers of metal meshes and a metal plate, and an integral structure which fills glass fiber damping materials in mesh holes and surfaces of the metal mesh composite plate. The more-layer-metal meshes and glass fiber sandwich structure is formed by putting layer by layer at interval or continuously two layers or more metal meshes, and most top side is provided with the metal plate. The composite material is obtained by exploding and pressing after fixation. An explosive compound method is employed to facilitate to produce the metal mesh damping material with large size, so that the production cost is low. Various different damping materials are filled in the mesh holes and the surfaces of the metal mesh plate, so that the metal mesh plate has good damping function, while the metal mesh plate enables the damping materials to increase the bonding strength with the metal plate, prolong the service life, and enlarge the application range.

The invention provides a washing machine (10) operable even in the presence of a great eccentric load and exhibiting an outstanding vibration attenuating effect by suppressing eccentricity even if laundry in a drum (30) is in an unbalanced position. The washing machine (10) comprises an inner drum (30) having a rotatably supported axis and a closed wall at at least one end thereof, and a plurality of liquid holding boxes (35) provided on the closed wall of the inner drum (30) externally thereof and each having an opening facing toward the axis. The periphery of the inner drum (30) is provided with hollow liquid holding tubes (37) communicating with the respective liquid holding boxes (35).

The invention discloses a two-stage vibration attenuation hydro-electric type active suspension with adjustable additional rigidity and damping and a working method, and belongs to the field of automobile suspensions. The suspension is composed of a first-stage vibration attenuation structure composed of an active force actuator and a spiral spring and a second-stage vibration attenuation structure with adjustable damping rigidity. The main power actuator comprises an actuator hydraulic cylinder, an oil supplementing energy accumulator, a hydraulic pump/motor and a motor/generator, and the second-stage vibration reduction structure comprises a spring hydraulic cylinder, an adjustable throttle valve, a spring energy accumulator, an electromagnetic valve and an air storage tank. The main power actuator is connected with an oil-gas spring in series. The suspension is provided with primary vibration reduction formed by the main power actuator and the spiral spring and secondary vibration reduction formed by the hydro-pneumatic spring, so that the associated inertia force of equivalent inertia mass of the primary vibration reduction structure is effectively reduced, the working states of the adjustable throttle valve and the electromagnetic valve can be conveniently adjusted according to the load state of an automobile, and the service life of the suspension is prolonged. And the rigidity and damping of the second-stage vibration reduction structure are changed.

The invention discloses a preparation method of a natural plant fiber-rubber composite material, degummed natural plant short fiber is first treated with cellulase, then subjected to microwave irradiation treatment, then vacuum-impregnated in an impregnating solution obtained by mixing nano silica, a silane coupling agent and ethanol, dried and cooled to obtain modified natural plant short fiber,and the modified natural plant short fiber, butyl rubber, zinc oxide, stearic acid, an accelerator, sulfur and an anti-aging agent are together added into a mixer for mixing, and then vulcanized in avulcanizer to obtain the natural plant fiber-rubber composite material. The preparation method is simple and convenient, and the obtained rubber composite material not only has excellent sound absorption and vibration damping effects, but also has good mechanical properties, is safe to use, good in environmental protection performance, and is suitable for noise reduction inside automobiles.

A liquid droplet ejecting head is disclosed which includes at least one or more nozzles which eject liquid droplets; one or more dedicated liquid chambers which are communicatively connected to the nozzle; a common liquid chamber which is communicatively connected to the dedicated liquid chamber; and an energy generating unit which generates energy provided to the dedicated liquid chamber, wherein at least one wall face of the common liquid chamber includes a flexible wall, which has flexibility; a buffer chamber is included in an opposing area via the flexible wall and the common liquid chamber; and wherein the buffer chamber is communicatively connected to an external space in an area not opposing the common liquid chamber.

The invention relates to the technical field of driverless sweeping vehicles, in particular to a front axle damping device for a driverless sweeping vehicle. The device comprises a chassis and a frontaxle located below the chassis. The device is characterized in that driving hubs are arranged at the two ends of the front axle; and tires are assembled on the driving hubs; the middle section of thefront axle is provided with a horizontal hinge seat so as to be hinged to the chassis; and the hinge axis of the horizontal hinge seat is perpendicular to the length direction of the front axle. Thedevice further comprises at least two sets of elastic buffer assemblies which are used for connecting the chassis and the front axle and have the vertical elastic telescopic function; the buffer directions of the elastic buffer assemblies are vertically arranged; and the elastic buffer assemblies are arranged on the two sides of the horizontal hinge base respectively. The device has the advantagesof simple structure, high applicability, cost-saving performance and high cost performance. The problem of the advancing stability of the whole vehicle when the driverless sweeper encounters a ruggedroad surface in the working process can be solved, and the sensing accuracy of vehicle-mounted equipment is ensured.

The invention discloses a bridge expansion joint structure includes a bridge main body and an expansion joint, the expansion joint divides the bridge main body into a first bridge main body and a second bridge main body, and a first support step is formed at the first bridge main body; the first support step is provided with a first fixing column, a second support step is formed at the second bridge main body, the second support step is provided with a second fixing column, and the side surfaces of the first and second support steps are separately and fixedly connected with C-shaped steel plates; an expansion joint connecting piece is arranged between the first bridge main body and the second bridge main body; the expansion joint connecting piece includes an upper support body and a lowersupport body which are both provided with reinforcing ribs; the upper of the expansion joint is provided with a cover plate; and elastic filling materials are filled between the expansion joint and the expansion joint connecting piece. According to the bridge expansion joint structure, the demand of expansion and deformation of a road can be met, the structure is steady, the bearing capacity is better, and the smoothness and the better comfort are achieved in the driving process; and the installation, the check and the maintenance are simple and convenient at the same time.

The invention provides a conductive rubber composite material with good damping property and a preparation method thereof. The composite material has good conductivity and can reduce weight of rubber products. The composite material has polyaniline/perlite composite particles which are evenly distributed in a rubber matrix. The composite particles are perlite particles with polyaniline in pores and on surfaces, are 1-5mm and account for 25-50% of the composite material by volume. The rubber matrix can be styrene butadiene rubber matrix or butyl rubber matrix.

The invention relates to bearing lubricating antirust oil and a preparation method thereof. The bearing lubricating antirust oil is specifically prepared from components in percentage by mass as follows: 20%-45% of 1# base oil, 1%-3% of a calcium antirust agent, 1%-3% of a barium antirust agent, 3%-5% of a sodium antirust agent, 1%-4% of a lubricant, 0-1% of an antioxidant, 0-1% of a preservativeand 20%-50% of 2# base oil. The bearing lubricating antirust oil takes refined mineral oil as a dissolution medium, is prepared from the antirust agents, the preservative, the antioxidant and the lubricant through compounding, has good antirust performance, lubricating performance, oxidation resistance and decay resistance and has the characteristics of being non-combustible, non-explosive and easy to clean.

The invention provides a household device with vibration-damped pipeline and method for producing the same. The inveniton relates to a domestic appliance with at least one pipeline 1, wherein at least one first adapter 3 is arranged on an inner component 2, 9 of the domestic appliance, on the first adapter a first damping element 4 is arranged, the first damping element 4 is at least partially contactsa pipeline 1 along the pipe circumference, a second adapter 5 is arranged in the domestic appliance, a second damping element 6 is aranged on the second adapter 5, and the pipeling 1 is arranged between the first damping element 4 and the second damping elment 6. The inveniton also relates to a method for producing hte domestic appliance.

The invention provides a compound spherical shell of a spherical robot. The compound structure of the spherical shell comprises a rigid substrate shell and a flexible coating layer, wherein the rigidsubstrate shell is made of structural type fiber reinforced compound material and is compounded by reinforced fibers and a thermosetting resin substrate; a honeycomb-shaped stiffening rib is arrangedon the inner surface of the rigid substrate shell, is made of thermosetting resin and can be subjected to integral hot press molding with the rigid substrate shell; the flexible coating layer is madeof copolymer elastomer materials. The light compound spherical shell has high specific strength, specific stiffness, rolling friction coefficients and impact energy dissipation factors and also has aquick repairing function. The spherical shell and the corresponding spherical robot serve as an open type automatic control platform, and various functional spherical robots can be developed and derived on the basis of the compound spherical shell of the spherical robot.