51results about How to "Good shock and noise reduction" patented technology

The invention discloses a ship propulsion device adopting a hydraulic thrust bearing, comprising a motor (1) and a hydraulic thrust bearing device, etc., the hydraulic thrust bearing device includes a thrust bearing box (8), and a thrust bearing box (8) is equipped with There is a thrust shaft (19), and the two ends of the thrust shaft (19) are respectively connected with the output shaft of the gearbox (3) and the propulsion shaft (10); a thrust disc (5) is also arranged in the thrust bearing box (8) , the thrust disc (5) is perpendicular to the thrust shaft (19) and is fixedly connected with the thrust shaft (19); a set of hydraulic cylinder assemblies are respectively provided on the left and right sides of the thrust disc (5), and each set of hydraulic cylinder assemblies and thrust A set of thrust pads is arranged between the discs (5); the lower surface of the thrust pads (6) is provided with a spherical convex portion (61), and the spherical convex portion (61) forms a point bearing contact with the piston support block (7). Using the ship propulsion device can effectively reduce the structural vibration and noise radiation level of the ship shell.

The invention discloses a shock insulation and noise reduction transformer base which comprises a transformer and mounting channel steel arranged at the bottom of the transformer, wherein C-shaped cushion pads are arranged below the mounting channel steel; a fixing plate is arranged below the C-shaped cushion pads; the mounting channel steel penetrates through the C-shaped cushion pads and are connected with the fixing plate through bolts; springs are arranged on the bottom surface of the fixing plate; guide columns are arranged in the springs; the other ends of the springs are connected with a supporting plate; penetrating guide holes matched with the guide columns are formed in the supporting plate; a buffering elastic block is arranged between the supporting plate and the fixing plate; an elastic block buffering bracket is arranged on the bottom surface of the supporting plate. By the arrangement of a plurality of layers of shock insulation structures, mechanical shock of the transformer can be effectively reduced, the influence, caused by the shock and the noise of the transformer, on the surrounding environment is reduced, and the service life of the transformer is effectively prolonged.

The invention discloses an intelligent-home floor cleaning device based on artificial intelligence. The intelligent-home floor cleaning device comprises driving devices, cleaning devices and an anti-collision protection device, wherein the driving devices are arranged at the lower portion of one side of a shell and symmetrically distributed; the cleaning devices are located at the upper portion and the lower portion of one side of the shell, and the anti-collision protection device is arranged at the top of the shell; the driving devices comprise universal wheels, the universal wheels are arranged at the upper portion of one side of the shell, the left end and the right end of one side of the shell are each provided with a driving wheel, and driving rotating shafts which are coaxially connected penetrate through the middles of the two driving wheels, and are coaxially connected with an output end of a driving motor; the two sides of each driving rotating shaft are each provided with adamping device, the damping devices comprise bearings, and the bearings sleeve the driving rotating shafts. The intelligent-home floor cleaning device based on artificial intelligence has the good anti-collision protection performance, and can provide the good damping noise reduction effect when the device works, disassembling and assembling are easy, and using convenience is improved.

The invention discloses a light foam Mn-Cu alloy high-damping material. The light foam Mn-Cu alloy high-damping material is a binary alloy formed by metal manganese and copper or a multicomponent alloy formed by manganese, copper and one or more of iron, nickel and aluminum. A preparation method of the light foam Mn-Cu alloy high-damping material comprises the following steps of mixing Mn-Cu alloy particles and a foaming agent evenly; putting mixed powder into a mold and conducting cold-press molding to obtain a blank body for standby application; conducting hot-press molding on the blank body to obtain a high-compactness blank body with the density greater than 80%; putting the high-compactness blank body into the mold, conducting foaming and then cooling, and finally obtaining the foam Mn-Cu alloy high-damping material with the uniform aperture. By means of the light foam Mn-Cu alloy high-damping material and the preparation method thereof, the defect that the density of a traditional high-damping Mn-Cu alloy is large is overcome; the damping property of the Mn-Cu alloy is effectively improved through the porosity and the high-density defect around cavities. Besides, by means of the method, the problems that the foaming temperature is high, the size distribution of pores is non-uniform and the technological operation is difficult are solved.

The invention discloses a helicopter and a blade thereof. The blade of the helicopter comprises a main body part, a blade root part and a blade tip part, wherein the main body part straightly extends along a horizontal direction; the blade root part is connected to one end of the main body part; the blade tip part is connected to the other end of the main body part, and the blade tip part downwards extends from one end, which is close to the main body part, of the blade tip part to one end, which is far away from the main body part, of the blade tip part. The blade of the helicopter disclosed by the embodiment of the invention has the advantages of high pneumatic hovering efficiency, good shock absorption and noise reduction effects, and the like.

The invention discloses a suspension type motor cover assembly structure, which comprises a motor and a motor cover for accommodating the motor, wherein the motor cover comprises a motor lower cover and a motor upper cover which is fixedly connected with the motor lower cover, and a buffering and damping space is formed between the motor lower cover and the motor or between the motor upper cover and the motor. Through multiple noise reduction settings, the suspension type motor cover assembly structure can absorb vibration in the vertical vibration and vibration in the circumferential direction, has obvious damping and noise reducing effects, and is particularly suitable for noise reduction of the motor on a vertical or pole type vacuum cleaner.

The invention discloses an environment-friendly sound-insulation, heat-insulation, waterproof and weather-resisting material and a preparation method thereof. The environment-friendly sound-insulation, heat-insulation, waterproof and weather-resisting material is prepared from the following raw materials in parts by weight: 15 to 20 parts of modified filling soil, 6 to 8 parts of enhanced fibers,5 to 7 parts of sound-absorption filler, 3 to 5 parts of nano additive, 5 to 9 parts of silicon dioxide sol, 20 to 26 parts of mineral powder filler, 9 to 11 parts of acrylic emulsion, 5 to 7 parts ofadhesion auxiliary agent, 3 to 5 parts of coupling agent, 3 to 5 parts of calcium carbonate powder and 4 to 6 parts of flame-retarding additive. The environment-friendly sound-insulation, heat-insulation, waterproof and weather-resisting material has excellent sound-insulation and noise-reduction effects, relatively good heat-insulation and waterproof performance and excellent wear resistance andcompression resistance, and does not volatilize harmful substances; furthermore, the environment-friendly sound-insulation, heat-insulation, waterproof and weather-resisting material also has certainadsorption performance and has the effect of purifying indoor air; meanwhile, the preparation method of the sound-insulation material has the advantages of relatively low cost, easiness for obtainingthe raw materials, simple technology, easiness for operation and easiness for realizing industrial production, and has relatively high practical value and a good application prospect.

A high-precision flared fitting forming tool is characterized by comprising a pipe body; the pipe body is dived into an upper pipe body end, a middle pipe body end and a lower pipe body end; the upper pipe body end is a necking-down end; the middle pipe body end is a transition segment; the lower pipe body end is a flaring end; the necking-down end comprises a necking-down body and a necking-down circular arc; the flaring end comprises a flaring body and a flaring circular arc; when a pipe fitting is machined, the stamping necking manner is adopted; the machining time of the pipe fitting is greatly reduced, and the technical characteristics of stamping necking are combined; the necking precision is effectively improved, and the product quality is improved; meanwhile, the machining time is reduced, the machining speed and the efficiency of the pipe fitting are improved, and cost generated by purchasing of a plurality of necking-down devices is saved; and the manual cost is reduced, and meanwhile energy losses are reduced.

The invention provides a manufacturing method of a weight balancing block for lowering noise and absorbing shock of a washing machine, and relates to the field of weight balancing blocks. The method comprises the following steps of 1, mixing, by weight, 12 parts of slag, 8 parts of cement, 3 parts of carborundum, 2 parts of gravel and 0.5 part of foaming agent, and adding 4 parts of water to sufficiently stir the materials to form a sizing agent; 2, putting the sizing agent into a microwave heater, wherein the treatment time is 5-10 min, the treated sizing agent is poured to a mold, and a weight balancing core is obtained after cooling and curing are conducted; 3, fixedly connecting the lower portion of the weight balancing core with a shockproof damping block to obtain the weight balancing block. According to the manufacturing method of the weight balancing block for lowering the noise and absorbing the shock of the washing machine, the weight balancing block can solve the problem of weight balancing, and the noise and vibration generated when the washing machine works are also lowered.

The invention discloses an aluminum alloy composite which comprises an aluminum alloy base body. Closed holes are irregularly uniformly distributed in the aluminum alloy base body. Fireproof fibers are arranged in the holes of the aluminum alloy base body. Damping of the aluminum alloy composite is improved by the aid of the holes and the fireproof fibers therein, and damping and noise reduction are realized. Further, the invention further discloses an engine cover plate made of the aluminum alloy composite. The engine cover plate has higher mechanical performance and excellent damping and noise reduction effects.

The invention belongs to the field of preparation processes of nano-porous materials, and relates to a preparation method of chopped fiber layered reinforced polyimide aerogel. Modified chopped fibers are used as a reinforcement material, the reinforced chopped fibers are uniformly dispersed in a polyimide aerogel structure in a layered manner, the chopped fibers are used as a skeleton to be inserted in a polyimide aerogel matrix; the fiber addition amount is small, and the fibers are laid in the aerogel matrix in a layered manner, so that a thermal bridge effect generated in heat conduction due to contact between fibers in the direction perpendicular to the fiber layer is avoided, and the heat insulation performance and the compressibility of the aerogel material are not reduced; and because the polyimide aerogel matrix is supported by a crisscross of split-resistant chopped fibers, the crack resistance of the aerogel composite material in the horizontal direction is greatly improved. The density of the prepared fiber layering reinforced polyimide aerogel is 0.09 to 0.12 g/cm<3>, and the thermal conductivity at room temperature is 0.04793 to 0.04859 W/(m*K).

The invention discloses a bactericidal flame-retardant smoke-proof moisture-proof non-toxic environmentally-friendly sound-insulating material and a preparation method thereof, the bactericidal flame-retardant smoke-proof moisture-proof non-toxic environmentally-friendly sound-insulating material comprises the following raw materials by weight: 8-12 parts of a smoke-proof flame-retardant additive,3-5 parts of a coupling agent, 3 to 5 parts of a bactericidal additive, 8 to 10 parts of modified fiber, 15 to 25 parts of a sound insulation additive, 3 to 5 of white carbon black, 12 to 14 parts ofa modified filler, 1 to 2 parts of nano zinc oxide, 1 to 3 nano titanium dioxide, 20 to 30 parts of an ethylene acrylic acid copolymer, 2 to 4 parts of a polyether polyol, 4 to 6 parts of a polyurethane emulsion, 0.7 to 1.1 parts of an antioxidant, 1 to 2 parts of a stabilizer, and 1 to 2 parts of a lubricant. The bactericidal flame-retardant smoke-proof moisture-proof non-toxic environmentally-friendly sound-insulating material has good sound insulation performance and excellent mechanical performance, has obvious flame-retarding and smoke-suppressing effect, excellent sterilization and mildew resistance, good moisture proofness and weather resistance, and no volatile harmful substances, and is non-toxic, environmentally-friendly and non-polluting; the cost of the preparation method is low, the raw materials are easy to obtain, and the bactericidal flame-retardant smoke-proof moisture-proof non-toxic environmentally-friendly sound-insulating material has high practical value and goodapplication prospects.

The invention discloses a positive pressure type wood fiber feeding device. The wood fiber feeding device comprises a device body, a damping base is arranged at the bottom of the device body, a supporting table is arranged at the top end of the damping base, an air compressor is arranged at the left end of the supporting table, a feeding hopper is arranged at the top of the left end of the supporting table, an air hammer frame is arranged at the left end of the middle of the feeding hopper, an air hammer is arranged on the air hammer frame, the right end of the air hammer is connected to the side wall of the feeding hopper, a servo motor is arranged below the air hammer frame, and a PLC is arranged on one side of the servo motor. The wood fiber feeding device has the advantages that the problems that an existing positive pressure type wood fiber feeding device is low in feeding speed, materials can adhere to the inner wall of a feeding hopper, blockage can be caused, meanwhile, a motorcan be skewed after being used for a long time, the skewing can be hardly observed by naked eyes, the abrasion of the motor is easily caused, and meanwhile, equipment can generate low-frequency vibration and noise can be solved.

The invention relates to a marine high-sound-insulation floating floor structure. The structure comprises a damping coating I arranged on a steel deck, and ceramic wool dividing strips which are arranged on the damping coating I and are close to a steel trunk bulkhead, a refractory deck dressing layer is arranged on the portion, between the ceramic wool dividing strips, of the damping coating I, arock wool board is arranged on the refractory deck dressing layer, a galvanized steel sheet I is arranged on the rock wool board, a damping coating II is arranged on the galvanized steel sheet I, a galvanized steel sheet II is arranged on the damping coating II, and the upper surface of the galvanized steel sheet II and the upper end faces of the ceramic wool dividing strips are at the same level. The structure is reasonable in structure arrangement, good in damping and noise reduction effect and high in resistance to deformation, and the fire rating reaches A-60 level.

The invention discloses a double-drum washing machine that comprises a first outer drum, a second outer drum, a first motor and a second motor, wherein a first drum and a second drum are arranged in the first outer drum and the second outer drum correspondingly, the first motor is in driving connection with the first drum through a transmission component, the second motor is in driving connectionwith the second drum through a transmission component, and the transmission components are preferably belt pulleys. According to the double-drum washing machine, both the two drums adopt belt transmission, so that the structure is simple, and the cost of the washing machine is reduced; and on the basis of belt transmission, the first outer drum and the second outer drum are integrally connected, and thus the shock absorption and noise reduction effect is obvious.

The invention discloses an air conditioner outdoor unit and an air conditioning system, and relates to the technical field of air conditioning equipment. The air conditioner outdoor unit comprises: a shell, wherein the shell is provided with a partition part, the partition part divides the interior of the shell into a first mounting cavity and a second mounting cavity, the part, connected with the partition part to form the first mounting cavity, of the shell and the partition part are each of a hollow structure and are vacuum, and the first mounting cavity is filled with damping particles and/or sound absorption layers are arranged on the surfaces, facing the first mounting cavity, of the partition part and the shell; a compression assembly, wherein the compression assembly is arranged in the first mounting cavity and comprises a damping mounting part and a compressor, the damping mounting part is arranged in the first mounting cavity, and the compressor is connected with the damping mounting part; and a fan assembly, wherein the fan assembly is arranged in the second mounting cavity and comprises a motor support, a damping part, a fan motor and a fan, the motor support is connected with the shell, a silencing cavity is formed in the motor support, a plurality of windward holes communicated with the silencing cavity are formed in the face, facing the fan, of the motor support, and the damping part is connected with the motor support and the fan motor. Damping and noise reduction can be achieved.

The invention discloses a damping and noise reduction structure of an electric scroll compressor. The damping and noise reduction structure comprises an end cover, a static vortex plate, a supportingdisc and a machine shell, wherein the machine shell is of a cylindrical structure, the end cover is arranged at the top of the shell, a concave structure is arranged in the machine shell, the supporting disc is arranged at the bottom of the sunken structure of the machine shell, the static vortex plate is arranged on the upper portion of the supporting disc, a rubber gasket A is arranged between the end cover and the machine shell, a rubber gasket B is arranged at the contact part of the supporting disc and the bottom of the sunken structure of the machine shell, the rubber gasket A and the rubber gasket B are bonded to the machine shell through glue or glue points; and the upper surface and the lower surface of the rubber gasket A and the rubber gasket B are provided with raised floatingpoints correspondingly. The damping and noise reduction structure has the advantages that the vibration can be reduced during acceleration and deceleration operation of the compressor, and the noise produced by the compressor can be reduced.