121results about How to "Increase internal friction" patented technology

The invention relates to a low cost and high efficient soundproof material and a manufacturing method thereof, relates to the field of soundproof materials, solves the problems that in the prior art, soundproof materials do not have a prominent soundproofing effect, generate harmful gas, which can harm the human health, and have a high cost; and provides a low cost and high efficient soundproof material. The soundproof material comprises thermoplastic resin and an inorganic filling material, wherein the surface of the inorganic filling material has been processed by a coupling agent processing liquid, the inorganic filling material accounts for 15 to 80 wt% of the total weight of the soundproof material, and the balance being thermoplastic resin. In the soundproof material, the connections among the particles are abnormal, thus the internal friction of the incident sound waves is increased by the structure of the soundproof material, and a relaxation effect is generated to absorb the sound waves. Filling materials with different particle sizes are corresponding to waves in different wavelengths or frequencies, so the soundproof material can reduce sounds in different frequencies. Moreover the soundproof material has a good soundproof effect and is suitable for being promoted and used.

A method of bonding a connector to a first object includes providing the connector, the connector being separate from the first object and including a thermoplastic material; arranging the first object and the connector relative to one another so that the connector reaches from a proximal side of the object through a first opening in the object; generating and applying vibrations and mechanical pressure to the connector until a flow portion of the thermoplastic material is liquefied and caused to flow sideways radially into an open space; and removing the source of the vibrations and causing the liquefied thermoplastic material to re-solidify, resulting in the connector with a foot portion, a head portion, and a shaft portion between the foot portion and the head portion. The shaft portion extends along an axis through the first opening, and secures the connector to the first object.

The invention relates to the field of products of sound insulation material, solves the problems in the prior art that the sound insulation material is poor in sound insulation effect, is incomprehensive in high and low frequency sound insulation, causes pollution and is easy to age, and provides an efficient sound insulation material and a manufacturing method thereof. The efficient sound insulation material includes a sound insulation layer, a sound absorption layer, and a bubble layer, wherein the bubble layer is located between the sound insulation layer and the sound absorption layer. The sound absorption layer is made of a sound insulation compound, and the sound insulation compound is prepared by raw materials of the following substances: a thermoplastic resin, inorganic fillers, and a foaming agent, wherein the inorganic fillers account for 15-80wt%, the foaming agent accounts for 5-15wt%, and the rest is the thermoplastic resin. In the efficient sound insulation material, the fillers with different particle diameters correspond to sound waves of different wave bands or frequencies, and thus consumption of sound energy of different frequencies is relatively comprehensive, and the sound insulation effect is good, so the sound insulation material is suitable for popularization and application.

A lithium-ion-conducting composite material and process of producing are provided. The composite material includes at least one polymer and lithium-ion-conducting particles. The particles have a sphericity Ψ of at least 0.7. The composite material includes at least 20 vol % of the particles for a polydispersity index PI of the particle size distribution of <0.7 or are present in at least 30 vol % of the composite material for the polydispersity index in a range from 0.7 to <1.2, or are present in at least 40 vol % of the composite material for the polydispersity index of >1.2.

The invention relates to a method and an apparatus for pneumatically conveying bulk material which does not flow readily.

A self-booting type hydro dynamic drive slip limit differential gear includes a left and a right casings and a differential gear assembly thereof; an L-shape pump case (18), a reset spring (20), a piston (19) are arranged between a end face (A) of the differential gear left casing (1) and a non-gear end face of the face gear (9), which compose a piston pump; an oil in duct (14), an oil out duct (21) are provided in the left case of the differential gear, and a uni-directional valve (16) is arranged between the oil in duct and a pressure chamber (23), the pressure chamber and the oil out duct; an annular oil cap is arranged on the case of the differential gear, which forms an oil in tank with the left case of the differential gear. The invention has simple structure, small volume, light weight etc., which automatically adjusts the locking capacity of the differential gear according to the speed difference between the driving wheels, reduces the curve resistance and the abrasion of the vehicles to be suitable for all vehicles.

The invention relates to a pressure-bearing lost circulation additive for a drilling fluid and for stably bearing pressure on a smooth fracture leakage wall surface. The lost circulation additive is composed of 10%-20% of damping material, 45%-50% of bridging material and 35%-40% of filling material by weight, wherein the damping material is an industrial metal screen, having the size of the damping material is 1.0*1.0mm to 3.0*3.0 mm and the thickness of the damping material is about 0.5 mm; the bridging material is calcium carbonate particles, and the standard mesh number of the screening mesh product of the bridging material is lower than 20 meshes; the filling material is a mixture composed of calcium carbonate powder and flexible graphite powder; the calcium carbonate powder is further divided into three grades to realize multi-grade filling and to form a compact shielding layer; and the mesh number of the flexible graphite is greater than 150, and the anti-pressure ability of a bridge plug section is improved. With the pressure-bearing lost circulation additive for the drilling fluid and for stably bearing pressure on the smooth fracture leakage wall surface disclosed by the invention, leak stoppage success rate and bearing pressure for smooth fracture leakage can be improved, leakage stoppage failure due to complexity is reduced, the benefits of exploring and developing a bored well are improved; and the preparation process of the lost circulation additive is simple and convenient, the source of the materials of the lost circulation additive is broad, and the lost circulation additive is easy to spread and apply.

The invention has provided a method to produce the foamed aluminium-silicon alloy which can control the density and the aperture. The method is: first to heat the 20-45 um blister at 400-450 deg.C, then to mlt the aluminium-silicon alloy and add 3-5% Al powder, next cooling the composite fusant to 600-620 deg.C and adding into 1-3% blister, last to rise the temperature to 650-680 deg.C. So when it cool, we can get the material. We can get the different density and aperture foamed aluminium-silicon alloy by changing the content of Al powder blister and cotnrolling the temperature of fusant or foaming.

The present invention makes public a type of car vibration damping products using high damping rubber compound materials, involving the rubber technical field, whose features are the following ones: chloride butyl, 100; carbon black N220, 10-40; carbon black N330, 20-50; naphthenic oil H-3107, 20-40; age resister RD, 1-3; age resister 4010NA, 1-3; homogenizing agent 40MSF, 3-6; indirect zinc oxide, 5-10; magnesium oxide, 0.1-0.5; accelerating agent BZ, 1-5.

By means of the above deployed car vibration damping products which use high dumping rubber, you get excellent heat and age resisting properties, and also high dumping properties.

The invention discloses an air inlet system of an annular cooling machine. An annular air duct consists of an annular liquid groove and a door-shaped sealing device; a sealing cover plate of the door-shaped sealing device covers on the annular liquid groove; an inner annular plate and an outer annular plate of a door-shaped air duct of the door-shaped sealing device extend downwards to the below of the liquid levels of an annular inner liquid tank and an annular outer liquid tank of the annular liquid tank respectively; the distance from an inner annular plate of the door-shaped air duct to an inner side annular plate of the annular inner liquid tank is larger than the distance from the inner annular plate of the door-shaped air duct to the inner annular plate of the annular air duct of the annular inner liquid tank; and the distance from an outer annular plate of the door-shaped air duct to an outer side annular plate of the annular outer liquid tank is larger than the distance from the outer side annular plate of the annular outer liquid tank to the outer annular plate of the annular air duct. The invention also discloses the annular air duct. The air inlet system can effectively prevent liquid in the annular liquid tank from splashing by overlarge vibration amplitude and ensures normal operation of the annular cooling machine.

The invention discloses a multifunctional permeable asphalt mixture and a preparation method thereof. The multifunctional permeable asphalt mixture comprises the following components in parts by mass: 100 parts of mineral aggregate, 4-6 parts of modified asphalt and 0.1-0.5 part of a fiber stabilizer, wherein the mineral aggregate is composed of coarse aggregate, fine aggregate, infiltration materials and mineral powder; the modified asphalt is composed of 100 parts of matrix asphalt, 4-8 parts of SBS, 8-12 parts of waste rubber powder, 0.4-0.9 part of MWCNT (Multi Walled Carbon Nanotubes) and 2-5 parts of a tackifier; and the fiber stabilizer is one of lignin fibers, mineral fibers or polyester fibers. According to the multifunctional permeable asphalt mixture provided by the invention, the mineral aggregate contains the infiltration materials, and the infiltration materials refer to low-cost and readily-available materials such as volcanic, activated carbon, ceramsite, zeolite or crab shell-clam shell powder and the like, so that rainfall runoff pollution can be effectively controlled, the aims of fully utilizing rainwater resources and supplementing groundwater resources are achieved, and the preparation cost can be effectively reduced. The used modified asphalt is compounded by the MWCNT and SBS, so that the shear deformation resistance of the asphalt can be obviously improved.

The invention discloses a rubber damping rubber gasket combined structure of an engine suspension. The rubber damping rubber gasket combined structure of the engine suspension comprises rubber damping rubber gasket bodies. Axle holes are formed in the center positions of the rubber damping rubber gasket bodies in the axial direction, a suspension beam installation mechanism is arranged on the rubber damping rubber gasket bodies, an engine suspension beam is fixed into the suspension beam installation mechanism, the rubber damping rubber gasket bodies are matched and fixed onto a frame lug through a connector and the axle holes, and a bushing is arranged between the inner walls of the rubber damping rubber gasket bodies and the connector. The rubber damping rubber gasket bodies are of pure rubber structures, the rubber hardness can be controlled through component ratios of rubber, thus requirements of stiffness and intensity can be met, the internal friction and damping of the rubber after deformation are bigger, the phenomenon of producing resonance with a vehicle is avoided, the damping effect is stable, the vibration noise can be reduced, vibration comfort is better, and the consistency control is better; the axial height is limited through arranging the bushing, installation in place is easy, and assembly is more convenient.

The invention discloses a fan shock absorber, which is characterized by comprising a fixing bolt (1), a metal protective layer (2), a spring (6), a base (7), a U-shaped protective shell (8) and a shock absorber body (9); the base (7) is provided with a rubber pad (5), and the rubber pad (5) is provided with the U-shaped protective shell (8); the shock absorber body (9) is fixedly clamped in the U-shaped protective shell (8), the spring (6) is arranged in the shock absorber body (9) and is fixedly provided with an adjusting screw (3), the adjusting screw (3) is fixedly tightened with the metal protective layer (2) through the fixing bolt (1), and the adjusting screw (3) is adaptive to the fixing bolt (1).

The invention discloses a seabed foundation pit blasting excavation underwater shock wave protective method and device. The method comprises the steps that (1) the position of a protective device is positioned according to the size of a foundation pit; (2) a flexible protective wall is manufactured and comprises a protective panel, protective reinforcement fabrics, springs and connection pieces, and the protective panel comprises a holed polyurethane foam panel, a chloroprene rubber interlayer and an air interlayer; (3) a protective device is installed and comprises the flexible protective wall, bottom shape steel, holed steel pipes and high-pressure air pipes, the lower portion of the flexible protective wall is connected with the bottom shape steel, the outer side of the bottom shape steel is connected with the holed steel pipes, the holed steel pipes communicate with the high-pressure air pipes, and the flexible protective wall is tied into a whole through ropes; and (4)a bubble curtain is formed through air inflation. According to the seabed foundation pit blasting excavation underwater shock wave protective method and device, the flexible protective wall and the bubble curtainare combined, effective reduction of underwater shock waves can be achieved close to a blasting zone, construction staff, marine organisms, the surrounding aquatic environment and underwater buildings are protected, meanwhile, through the absorption effect of the protective panel on the shock waves, shock wave reflection is reduced, and a foundation pit is protected.

The invention discloses a spring shock absorber, which is characterized by comprising an upper shell (1), springs (2), a fixing metal plate (3), a nut (5), fixing bolt holes (9), a base (10) and a damping rubber ring (11). The fixing bolt holes (9) are formed in the left side and the right side of the fixing metal plate (3); the damping rubber ring (11) is arranged on the fixing metal plate (3); the base (10) is arranged on the damping rubber ring (11); the upper shell (1) covers the base (10); the upper shell (1) and the base (10) are tightly fixed through the nut (5); and the springs (2) are arranged in the upper shell (1).

The invention relates to a flame-retardant wide-temperature-range high damping composite material and a preparation method thereof, which belongs to the field of a damping functional material. The flame-retardant wide-temperature-range high damping composite material comprises the following components in parts by weight: 100 parts of matrix resin, 100 to 200 parts of petroleum asphalt, 150 to 300parts of flame retardant agent, 150 to 300 parts of reinforcing agent, 1 to 3 parts of anti-aging agent, 10 to 25 parts of vulcanizing system, 3 to 5 parts of interface agent, and 5 to 10 parts of functional additives. By adopting a mixing, extrusion and calendaring method, the prepared flame-retardant wide-temperature-range high damping composite material has excellent damping performance, significant damping and noise reduction effect, and wide-temperature-range and wide-frequency-range adaptability; the flame-retardant wide-temperature-range high damping composite material is excellent in flame retardant performance and capable of being automatically extinguished without fire and has no liquid droplets; and the flame-retardant wide-temperature-range high damping composite material is environment-friendly, stable in performance, capable of meeting the application requirements for damping and noise reduction of vehicles in the field of traffic transportation, and wide in application prospect in the industries such as cars, high-speed railways, ships and the like.