124 results about "Frictional energy" patented technology

A tire wear state estimation system estimates forces and sliding velocity generated in a tire contact patch, determines frictional energy from the tire force and sliding velocity, and generates an estimate of tire wear state based upon the frictional work done by the tire. A tire wear estimate, pursuant to the system and methodology, is made by determining the amount of frictional work performed by the tire through the integrated use of tire-mounted, GPS sourced, and vehicle-mounted sensor information.

The invention discloses a frictional energy dissipation self-centering shear wall structure with an easily restored bottom. The frictional energy dissipation self-centering shear wall structure with the easily restored bottom comprises at least one structure unit, and the structure unit comprises an ordinary prefabricated wall section, a spiral stirrup reinforcement prefabricated wall section, an easily restored wall section located at the lower side of the spiral stirrup reinforcement prefabricated wall section, friction dampers located at two sides of the easily restored wall section, and an un-bonded pre-stressed tendon located in the wall body; the spiral stirrup reinforcement prefabricated wall section comprises an inside spiral stirrup, a pre-embedded plate inserted in the spiral stirrup, and T-shaped connecting plates connected with the easily restored wall section and further connected with slotted spiral stirrup reinforcement wall blocks of the easily restored wall section; the easily restored wall section comprises two slotted spiral stirrup reinforcement wall blocks; each friction damper comprises an upper support and a lower support. The frictional energy dissipation self-centering shear wall structure with the easily restored bottom is capable of effectively eliminating the plastic deformation of the concrete shear wall and simplifying the self-centering shear wall restoring method, and the engineering structure restoring cost and difficulty are greatly lowered after an earthquake.

The invention relates to a wear-resistant and antifriction composite coating for aluminum alloy component surfaces. The coating is composed of, by weight, 13-15% of tungsten carbide powder, 18-20% of titanium diboride powder, 2.0-4.0% of cerium oxide powder, 3.0-5.0% of nickel-coated molybdenum disulfide powder and the balance nickel-base alloy powder, wherein the components are blended through adhesives and then are arranged on the aluminum alloy component surfaces in a laser cladding mode for forming the coating; in the nickel-coated molybdenum disulfide powder, the coating ratio of nickel is 71-73%; nickel-base alloy is composed of, by weight, 0.75-0.85% of C, 15-16% of Cr, 3.5-4.5% of Si, 3.0-4.0% of B, 14.5-15.5% of Fe and the balance Ni. The coating is high in wear resistance and low in friction coefficient and solves the friction and wear problems of aluminum alloy used for friction members of mechanical equipment at high loads or impact loads, the service life is prolonged, and the friction energy consumption is lowered.

The present invention is directed to three dimensional weaves composed of wires or yarns that offer the potential for damping not achievable with solid materials, including high temperature damping. Three damping mechanisms have been identified: (1) Internal material damping, (2) Frictional energy dissipation (Coulomb damping), and (3) inertial damping (tuned mass damping). These three damping mechanisms can be optimized by modifying the wire material chemistries (metals, ceramics, polymers, etc.), wire sizes, wire shapes, wire coatings, wire bonding, and wire architecture (by removing certain wires). These have the effect of modifying the lattice and wire stiffnesses, masses, coefficients of friction, and internal material damping. Different materials can be used at different locations in the woven lattice. These design variables can also be modified to tailor mechanical stiffness and strength of the lattice, in addition to damping.

The invention relates to a coating composition with functions of friction resistance and wear resistance, which is a powdered mixture composed of titanium carbide powder, nickel-coated calcium fluoride powder, nickel-coated graphite powder, yttrium oxide powder and nickel-based alloy powder, the weight ratio of each component is that: 23-25, 13-15, 8-10, 1, 50-55, wherein the mass part of each element in the nickel-based alloy are: 0.8% of C, 15.5 of Cr, 4% of Si, 3.5% of B, 15% of Fe and 61.2% of Ni. The coating composition with functions of friction resistance and wear resistance can be deposited on a frictional pair surface of a member through a plasma spraying mode to form a self lubricating coating, and is capable of greatly reducing the frictional coefficient, raising the wear resistance performance of the frictional pair of the member, solving the problems of friction resistance and wear resistance of a stress mechanical device with dry friction and high contact which is exposed in the adverse environment, and reducing the frictional energy consumption of the machinery.

Provided is a rubber index calculating device which calculates a tire rubber index with high accuracy. The rubber index calculating device (12) is such that a frictional energy measuring device (14) is made to measure tire frictional energy supplied to a tire under a plurality of tire input conditions, on the basis of the shear forces and slip amounts of the contact surface of the tire, that the frictional energy measuring device (14) is made to measure the frictional energy of a sample made of the same material as that of the tire, under sample input conditions which are set on the basis of the tire frictional energy measured under the aforementioned plurality of tire input conditions, that the measurement conditions for the sample wear amount are set on the basis of the tire frictional energy measured under the plurality of tire input conditions and on the basis of the sample frictional energy measured under the plurality of tire input conditions, that a wear amount measuring device(16) is made to measure the wear amount of the sample under the set measuring conditions, and that the tire rubber index is calculated on the basis of the sample frictional energy and wear amount which are measured.

A damping mechanism (1) that generates a damping force in response to a liquid flow between a first liquid chamber (R1) and a second liquid chamber (R2) comprises a partitioning member (2) separating the first liquid chamber (R1) and the second liquid chamber (R2) and a flow passage (P) formed in the partitioning member (2) to connect the first liquid chamber (R1) and the second liquid chamber (R2). The flow passage (P) comprises an odd number of through-holes (10-14) greater than three which penetrate the partitioning member (2) and are connected in series. A large amount of frictional energy loss due to a long path length occurs in the flow passage (P) and causes the damping mechanism (1) to generate a sufficient damping force.

The invention provides an anti-biofouling friction power generation coating material and a preparation method and application thereof, and relates to the technical field of friction power generation coatings. A coating prepared from the anti-biofouling friction power generation coating material has good triboelectrification performance, friction energy in the environment can be effectively collected, the current generated in the friction testing process is 0.1-30 microamperes, and the voltage is 1-200 V; and the coating also has good anti-biofouling performance, has a protection effect on a base material, and has a biofouling coverage area of 3-10%. The coating material disclosed by the invention has friction power generation and antifouling properties; according to the friction power generation coating, mechanical energy can be converted into electric energy, so that adhesion of organisms on the surface of the coating is inhibited, the antifouling effect can be improved, the obtainedcoating can be cured at normal temperature, has good environmental adaptability and constructability and can be applied onto the surfaces of various materials, and the application range of the friction power generation coating is greatly expanded.

The invention relates to a frictional energy dissipation type buckling-restrained brace, which belongs to the field of seismic control of building structures. The frictional energy dissipation type buckling-restrained brace comprises a restraining member (1), a piston (2) and an energy dissipation core (3). The piston (2) is arranged at the middle of the energy dissipation core (3), the restraining member (1) sleeves the surface of the piston (2), the restraining member (1) is fixed at one end of the energy dissipation core (3) through an end plate (4), and connecting steel plates (5) are arranged at both ends of the energy dissipation core (3). Since the invention arranges the piston in the conventional buckling-restrained brace, the frictional energy dissipation mechanism is introduced. When inter-story displacement takes place in a structure, the energy dissipation core can be plastically deformed to dissipate energy, at the same time, the energy dissipation core and the restraining member shift relatively, the piston fixed on the energy dissipation core and the restraining member move relatively, energy is dissipated by the friction between the piston and the restraining member, and thereby the energy-dissipating capability of the buckling-restrained brace is effectively enhanced.

The invention discloses a frictional-energy-consumption-longitudinal-beam-based hybrid spraying-steel frame overall avoidance changing initial-supporting structure and a construction method thereof. The structure comprises a steel frame, a frictional energy consumption longitudinal beam, a sprayed concrete, reinforcing meshes, longitudinal threaded steel bars, and circumferential threaded steel bars. The steel frame is formed by bold bending of profile steels. The frictional energy consumption longitudinal beam mainly includes an upper support member and a lower support member that are made ofchannel steels; and energy is consumed by the friction effect between flanges of the upper support member and the lower support member. And the longitudinal threaded steel bars and the circumferential threaded steel bars are added in the sprayed concrete between two steel frame units. While coordinated deformation of the initial support of the tunnel and the surrounding rock, the frictional energy consumption longitudinal beam enables the initial support to have the certain pressing-resistant and shearing-resistant performances; with the longitudinal steel bars and circumferential steel barsand longitudinal arrangement of the frictional energy consumption longitudinal beam, the joint deformation capability of the tunnel steel frame and the initial supporting structure formed by the sprayed concrete between the steel frames is strengthened, so that the structure damage caused by deformation incompatibility of the steel frame and the sprayed concrete is avoided and thus a coupling effect of the harness with softness is realized.

The invention discloses an anti-erosion and friction-resistant film for fan blades of an aeto-turbofan engine and a preparation method of the anti-erosion and friction-resistant film. The anti-erosion and friction-resistant film for the fan blades of the aeto-turbofan engine comprises a blade base (0), a transition layer (1), a friction-resistant film layer and an anti-erosion film layer from inside to outside sequentially, and is deposited from inside to outside by starting from the blade base sequentially. The anti-erosion and friction-resistant film has excellent anti-erosion and friction-resistant capacity and high surface hardness, and the surface hardness is higher than 3,200 HV. A chromium nitride layer located on the outermost layer has high hardness and low friction coefficient, and the anti-erosion performance of a film surface is improved; adopted nitride layers have excellent corrosion resistance, so that the service life of each fan blade of the aeto-turbofan engine is prolonged.

The invention discloses a semi-rigid node friction energy dissipation device which comprises a wood column and a wood beam connected with the wood column through a mortise and tenon node. A friction energy dissipation device body is connected between the wood column and the wood beam which are at the mortise and tenon node; the friction energy dissipation device body is connected to the wood column and the wood beam through a beam-end connecting piece and a column-end connecting piece correspondingly; the friction energy dissipation device body comprises a beam-end connecting rod connected to the beam-end connecting piece and a plurality of column-end connecting rods connected to the column-end connecting piece; the multiple column-end connecting rods are connected with the beam-end connecting rod through middle connecting pieces provided with friction sheets in the middles; the friction energy dissipation device body provides stiffness before beam-column nodes conduct displacement and provides frictional energy dissipation after the beam-column nodes conduct displacement. The semi-rigid node friction energy dissipation device relieves the limitation of a friction energy dissipation device in the aspect of friction force control and has the advantages of being high in durability, flexible in use and easy to mount.

Cones or cone assemblies with one or two oppositely positioned torque transmitting devices, such as torque transmitting arcs of constant pitch (formed by torque transmitting members) or teeth. The torque transmitting devices will be used for torque transmission between at least one means for coupling, such as transmission belt or chain, and a cone or cone assembly. The cones or cone assemblies can be used to construct CVT's for which significant circumferential sliding between the torque transmitting surfaces of the torque transmitting devices and the torque transmitting surfaces of the means for coupling engaged to them due to change in pitch diameter can be eliminated, as to reduce wear and frictional energy loses typical in similar devices of prior art and allow the usage of positive engagement devices, such as teeth, in coupling the torque transmitting devices with their means for coupling. CVT's that consist of at least one cone or one cone assembly of this invention that is coupled by a means for coupling to at least one means for conveying rotational energy, such as a pulley, a sprocket, a cone assembly of this invention, or a cone of this invention. Adjuster systems that can increase the performance of the CVT's of this invention and other CVT's that suffer from either or both transition flexing and a limited duration at which the transmission ratio can be changed, so that efficient non-friction dependent CVT's and efficient friction dependent CVT's that do not suffer from transition flexing and/or a limited duration at which the transmission ratio can be changed can be constructed.

The invention provides a friction energy recovery vibration absorber with an inner and outer double-layer vibration absorption structure. The friction energy recovery vibration absorber comprises theinner-layer vibration absorption structure, the outer-layer vibration absorption structure, an inner-layer damping adjustment and energy conversion device and an outer-layer damping adjustment and energy conversion device, wherein the inner-layer vibration absorption structure comprises a mass block (5), an inner-layer guide column (7), an inner-layer vibration absorption spring (12) and an inner-layer insulating shell (14), the inner-layer damping adjustment and energy conversion device comprises inner-layer electrode metal (4) and an inner-layer dielectric plate (6), the outer-layer vibration absorption structure comprises an outer-layer guide column (3), an outer-layer vibration absorption spring (13) and an outer-layer insulating shell (17), and the outer-layer damping adjustment and energy conversion device comprises outer layer electrode metal (1) and an outer layer dielectric plate (2). According to the friction energy recovery vibration absorber with the inner and outer double-layer vibration absorption structure, through the contact sliding type conductor-dielectric independent layer friction power generation principle, only contact and friction exist between a dielectricand a metal electrode, collision among materials is avoided, and secondary vibration damage is avoided.

The invention discloses a research method for the influence of the base support rigidity gradient change on the friction force. Comprises the following steps: step 1, establishing a molecular dynamicsmodel. The model system consists of a square graphene sheet adsorbed on the tip of a simulated atomic force microscope probe and a monolayer graphene substrate supported by a rigidity gradient. Step2, the effect of the stiffness gradient on the average friction force of graphene. As the stiffness increases, the friction energy consumption decreases. When the stiffness exceeds a certain criticalvalue, the friction force does not decrease any more. Step 3, the influence of stiffness gradient on the normal load. When the bracing stiffness is large, the normal deformation of the substrate is small, the distance between the sheet and the substrate is small, and the Van der Waals force between layers is large. Step 4, the internal mechanism of the influence of the stiffness gradient on the friction force. The friction force is caused by the potential gradient of the interface barrier and the thermal vibration of the atoms with different stiffness, and the boundary barrier caused by the asymmetric deformation of the atoms on both sides of the boundary transition zone and the sudden change of the degree of freedom constraint.

The invention provides a contactor electromagnetic system which comprises a base, a coil, a magnetic yoke, an armature and an elastic buffering piece, wherein the coil, the magnetic yoke and the armature are arranged in the base, the elastic buffering piece is disposed between the coil and the base. A mounting hole is formed on the magnetic yoke and the extending direction of the mounting hole is perpendicular to the axial direction of the coil. The elastic buffering piece is a sheet spring, the middle of the sheet spring is an arc which is inserted in the mounting hole and protrudes towards an impacted part of the base, and the arc top is deformed due to compression of the wall of the mounting hole so as to buffer vibration of the armature and the magnetic yoke when the magnetic yoke and the armature bounce in opposite directions after impacting the base. According to the invention, vibration of the armature and the magnetic yoke can be quickly attenuated and stopped due to large energy loss of the sheet spring in the compression and elastic recovery processes, energy loss generated when the armature and the magnetic yoke impact the base and frictional energy dissipation generated when the two ends of the sheet spring slide in a reciprocating mode on the base or the coil in the compression and elastic recovery processes of the sheet spring.