104results about How to "Improve the shock and noise reduction effect" patented technology

The invention discloses a production process for a stainless steel damping composite board, which comprises the following steps of: firstly, preheating a hot galvanizing cold-rolled steel sheet; secondly, rolling and adhering a macromolecular damping adhesive film on the preheated hot galvanizing cold-rolled steel sheet by using a film coating roller; thirdly, rolling and combining the stainless steel sheet on the macromolecular damping adhesive film by a sheet coating roller, heating the whole sheet body by a pressing roller at the same time and further performing rolling and adhesion to realize stable solidification; and finally, cooling the whole sheet body by using forced air cooling and rolling the cooled sheet to obtain the stainless steel damping composite board, wherein the stainless steel sheet is a surface plate, the hot galvanizing cold-rolled steel sheet is a base plate and the macromolecular damping adhesive film is a middle layer; the preheating temperature of the hot galvanizing cold-rolled steel sheet is 80 to 120 DEG C; the temperature of the film coating roller is 120 to 150 DEG C; the temperature of the sheet coating roller and the pressing roller is 170 to 220 DEG C; and the composite board is cooled to 20 to 30 DEG C by the forced air cooling. The process has the advantages that: the production is simple; the cost is low; and the product uses few stainless steel, has a high strength, and can damp and reduce noises and be produced continuously with low cost and high production process.

The invention discloses intermittent type pesticide spraying soil repairing equipment. The intermittent type pesticide spraying soil repairing equipment comprises a box, a base, a liquid pesticide box, a hydraulic cylinder, a damping base, a rotation rod, stirring blades and a liquid spraying pipe. The box is arranged on the top of the base in an erected through the damping base arranged at the bottom end of the box. The rotation rod is rotationally erected in the box. The multiple stirring blades are evenly distributed on the rotation rod. The bottom of an inner cavity of the liquid pesticidebox communicates with an inner cavity in the upper portion of the hydraulic cylinder. The liquid spraying pipe is embedded in the inner wall of a top plate of an inner cavity of the box. The liquid spraying pipe communicates with the inner cavity in the upper portion of the hydraulic cylinder through a hydraulic cylinder outlet pipe. A guiding column is arranged on the outer end face of a rotation disc and sleeved with a lifting loop bar in a sliding manner. A push-pull rod is fixedly arranged at the top end of the middle portion of the lifting loop bar. The top end of the push-pull rod is fixedly connected with the bottom of a piston in the inner cavity of the hydraulic cylinder. The intermittent type pesticide spraying soil repairing equipment is good in damping and noise lowering effect, intermittent supply of liquid pesticide can be achieved, sufficient mixing of liquid pesticide and soil is achieved, the soil treatment effect is good, and the intermittent type pesticide sprayingsoil repairing equipment is suitable for usage and popularization.

The invention discloses a vibration attenuating and noise lowering type soil restoration device. The vibration attenuating and noise lowering type soil restoration device comprises a box body, a chemical agent box, a vibration attenuating and noise lowering base, a supporting base, a liquid spraying pipe, crushing blades and crushing knife blades; two side plates of the box body are fixedly erected on two rising and falling sliders through supporting connection rods correspondingly; the box body is further erected on the top of the supporting base through the vibration attenuating and noise lowering base arranged at the bottom end of the box body; the liquid spraying pipe is further fixedly erected at the bottom of a top plate of a supporting framework through a supporting rod; a pluralityof sprayers with downward openings are uniformly distributed in the bottom of the liquid spraying pipe; a rotating rod is rotationally erected in an inner cavity of the box body; and the crushing blades are uniformly distributed and fixedly arranged on the periphery of the rotating rod. The vibration attenuating and noise lowering type soil restoration device is simple in structure, convenient touse, good in vibration attenuating and noise lowering effect, obvious in soil restoration effect and high in practicability, and chemical agents and soil are mixed sufficiently.

The invention discloses a washing machine balancing ring and a washing machine. The balancing ring and the washing machine belong to the field of washing devices and accessories of the same and are designed in order to solve the problems that existing rollers cannot move easily and have large friction force. The washing machine balancing ring disclosed by the invention comprises an annular shell body, wherein a cavity is disposed in the shell body; isolation bodies and balls are disposed inside the cavity at intervals; each isolation body isolates every two adjacent balls so as to avoid direct collision between the two adjacent balls; and each ball can move independently relatively to the other balls. The washing machine disclosed by the invention comprises an inner drum, wherein the balancing ring is disposed on the inner drum. The washing machine disclosed by the invention is characterized in that each isolation body of the balancing ring can isolate the two adjacent balls so as to avoid direct collision of the balls, so that noise can be reduced on the premise that a vibration reduction function of the balls serving as balancing weights is not influenced; and a service life of the balls can be prolonged. The washing machine balancing ring is disposed on the inner drum of the washing machine disclosed by the invention; and vibration reduction and noise reduction effects are good.

The invention discloses a composite material battery box, which comprises a lower shell and an upper cover, wherein the lower shell is of a sandwich structure and comprises an outer shell, a reinforcing support and an inner shell which are bonded into a whole through a structural adhesive, a cooling water path layer is laid on the inner bottom surface of the lower shell, a plurality of battery packs are fixed on the cooling water path layer, and two adjacent battery packs are provide with a mica sheet therebetween; the upper cover is formed by compounding multiple layers of materials, the middle layer of the upper cover is a filling material layer, the upper surface and the lower surface of the filling material layer are laminated with a fiber material layer, and the filling material layerand the fiber material layer are adhered and fixed through foamed polyurethane sprayed on the fiber material layer. According to the technical scheme of the invention, the battery box formed by adopting the composite material of various different materials has the advantages of easy forming, good corrosion resistance, good insulation, high temperature resistance, heat insulation, flame retardance, explosion prevention and the like, improves the safety performance of the battery packs, improves the endurance mileage and the stability of the endurance mileage, reduces the mileage anxiety, and is excellent in shock absorption and noise reduction performance.

The invention discloses a low-density environment-friendly damping and denoising protective coating. The coating comprises thermoplastic acrylic resin, an ethylene vinyl acetate copolymer, a plasticizer, a foaming agent, a foaming accelerant, a crosslinking agent, an assistant crosslinker, a thixotropic agent, a moisture proof agent, a pigment, filler and the like. The coating can be cured at the temperature of 140 DEG C for 30min; compared with the traditional PVC (Polyvinyl Chloride) vehicle bottom coating, the low-density environment-friendly damping and denoising protective coating has the advantages that a cured substance has the advantages of favorable elasticity, good corrosion resistance, low density, strong adhesive force, excellent damping and denoising performances, no halogen, environment friendliness and the like; the coating can be applied to positions such as a floor, a wheel cover, a side body and the like of a car to play roles in damping, denoising, resisting to stone impact and the like.

The invention discloses a cement-based flexible permeable brick, which is prepared from the following raw materials in parts by weight: 30-50 parts of rubber particles, 25-45 parts of steel slag, 15-30 parts of cement, 1.5-4 parts of bicyclopentadiene dioxide epoxy resin, 1-2 parts of a modifier, 0.3-0.8 part of a water reducing agent and 3-8 parts of water. The cement-based flexible permeable brick is relatively low in elasticity modulus, relatively good in damping and noise-reducing effects and good in frost-resistance on the premise of meeting the compressive strength and the permeability coefficient, can meet the requirements of people on the comfort level, also has good noise-reducing capacity and anti-frost property and can be applied to gardens, sidewalks and squares in large areas.

The invention provides a shock-absorption noise-reduction structure in a ship cabin. A plurality of elastic hanging members are arranged on an upper deck; lower ends of the elastic hanging members areconnected to a ceiling; a floor is arranged on a lower deck; a bottom groove is formed in the floor; a top groove opposite to the bottom groove is formed in one end of the ceiling; a cabin wall boardis arranged between the top groove and the bottom groove; sound-insulation shock-absorption pads are symmetrically arranged on two ends of the bottoms of the elastic hanging members; a supporting plate is arranged on one end near the cabin wall board, of the floor; a sound insulation pad is arranged between the supporting plate and the floor; and the floor includes an anti-skid layer, a dressinglayer, a ceramic wool plate layer, a sound insulation plate layer, and a latex cement layer from top to bottom. The beneficial effects of the invention are that cabinet shock and noise are greatly weakened or eliminated under the actions of parts such as the sound insulation pad, the sound-insulation shock-absorption pads, and the sound insulation plate layer; the shock-absorption noise reductioneffect is enhanced; and elastic connections can greatly reduce sources generating noise and shock, and then the noise value in the cabin can meet the demand.

The invention discloses a washing machine damping mechanism and a washing machine, relates to the technical field of washing machines and is designed for solving the problem that an existing washing machine damping mechanism is poor in damping effect, large in washing machine balance weight and incompact in structure. The washing machine damping mechanism comprises multiple first dampers supporting an outer tub of the washing machine, and a second damper is connected between at least two first damper. In addition, the invention provides the washing machine provided with the damping mechanism. On the basis of original first dampers, the second damper for connecting two first dampers is added for the washing machine damping mechanism, the amplitude of the outer tub of the washing machine is further inhibited through the second damper, vibrations of the whole machine in vertical and horizontal directions are effectively limited, accordingly the balance weight is effectively decreased, and the washing machine is compact in structure while achieving better damping and noise reduction effects.

The invention provides a motor height adjusting bracket, which comprises a bottom plate, universal wheels, braking devices, a side plate, a supporting plate, a guide groove, a guide block, cylinder devices, a motor, a shock absorbing rubber pad, shock absorbing cavities, shock absorbing springs, mesh plates and a cooling fan, wherein the universal wheels are symmetrically arranged at the bottom end of the bottom plate; the braking devices are arranged on the universal wheels; the side plate is arranged at the right side of the top end of the bottom plate; the supporting plate for placing the motor is arranged in a lifting and falling mode at the top end of the bottom plate through the cylinder devices; the side plate is provided with the guide groove extending vertically; the edge positionof the supporting plate is fixedly provided with the guide block in sliding connection with the guide groove; the left side of the supporting plate is provided with two vertically-arranged mesh plates; the cooling fan is arranged between the mesh plates; the top end of the supporting plate is provided with the shock absorbing rubber pad; the shock absorbing rubber pad is internally provided witha plurality of shock absorbing cavities; and any shock absorbing cavity is internally provided with the shock absorbing spring. The motor height adjusting bracket has the beneficial effects of good cooling effects and good shock absorbing and noise reducing effects.

The invention discloses a heat dissipation device for communication equipment, and the heat dissipation device comprises a box body. An outer wall of one side of the box body is fixedly provided witha cover plate through a bolt, and the inner walls of two opposite sides of the box body are fixedly provided with the same chip through bolts. The outer wall of one side of the chip is fixedly provided with first cooling fins and second cooling fins, distributed at equal intervals, through bolts. The outer wall of one side of the cover plate is fixedly provided with second fans, distributed at equal intervals, through bolts. Moreover, the second fans have the same height as the first and second cooling fins. The outer wall of one side of the cover plate is provided with heat dissipation holeswhich are annularly distributed at equal intervals, and the heat dissipation holes have the same height as the second fans. The outer wall of the top of the box body is welded with an air incoming pipe, and one end of the inner wall of one side of the air incoming pipe is welded with a filter screen. According to the invention, the device can achieve the air convection effect in the box body, improves the effect of the heat dissipation device, quickly reduces the internal temperature of the box body, protects equipment from being damaged by overheating, and generates very small noise and vibration during operation.

The invention relates to a denoising motor. The denoising motor comprises a stator, a rotor, a rotation shaft, a motor shell and a denoising group, wherein the motor shell comprises a left end cover,a right end cover and a shell, the rotation shaft penetrates through a center of the rotor, a left bearing and a right bearing respectively sleeve two ends of the rotation shaft, the left bearing is arranged in the left end cover, the right bearing is arranged in the right end cover, the left end cover is fixedly arranged at a left end of the shell, the right end cover is fixedly arranged at a right end of the shell, the stator, the rotor and the denoising group are arranged in the shell, the denoising group comprises an internal denoising group and an external denoising group, the internal denoising group is arranged between the rotation shaft and the rotor, the external denoising group is arranged between the rotor and the stator, the stator is fixedly arranged at an inner wall of the motor shell, the internal denoising group comprises a first annular sleeve and a second annular sleeve, the first annular sleeve fixedly sleeves the rotation shaft, a rotation shaft hole is formed in the center of the rotor and is used for accommodating the rotation shaft, and the second annular sleeve is fixedly arranged on an inner wall of the rotation shaft hole.

The invention discloses a lift limiter for a compressor, which comprises a lift limiter body (2) arranged on an exhaust hole (1) of the compressor, the lift limiter body (2) There is an exhaust valve (3) between the exhaust hole (1); one end of the lift limiter body (2) is set as an upwardly tilted part (4), and the lift At least one groove (5) is evenly provided on the lower surface of the upwardly tilted part (4) of the limiter body (2); a shock absorber (6) is provided on the groove (5); The other end of the stroke limiter body (2) is provided with a fixed installation hole (7). The invention reduces the contact stress between the exhaust valve plate and the lift limiter body by being used for the lift limiter of the compressor, reduces the impact caused by the exhaust valve plate on the lift limiter body, and improves The service life of the lift limiter body is improved, the noise and vibration are reduced, and the service life of the exhaust valve plate is also prolonged.

The invention relates to the field of washing equipment, in particular to a dish washing machine. The dish washing machine comprises a casing, a liner arranged in the casing, a water stirring device mounted in the center of the liner and a driving motor for driving the water stirring device to rotate, wherein the driving motor is fixedly mounted below the liner through a motor bracket, and a shock absorbing device is arranged between the driving motor and the motor bracket, so that the driving motor and the motor bracket are in flexible connection. The shock absorbing device can have better shock absorbing and noise reducing effects; in particular, when a bulge of a second shock absorbing pad is embedded in a groove of a first shock absorbing pad, the driving motor is in flexible connection in axial and radial directions, and the shock absorbing and noise reducing effects are better.

The invention discloses a moisture-proof and noise-reduction electrical control cabinet, which comprises a cabinet body, a cabinet door, an air blower, a control panel, a first temperature and humidity sensor, sliding grooves, air holes, connecting blocks, an electric push rod, a baffle, sliding blocks, an air guide cover, trapezoidal ventilation holes, electric heating sheets, a filter screen, aconnecting plate, sound absorption plates, fixing frames, sound absorption cotton, a bearing plate, telescopic springs, a second temperature and humidity sensor, trapezoidal grooves, sponge balls, rectangular openings, sound insulation blocks and circular openings. The cabinet door is movably connected to one side of the cabinet body through hinges. The control panel is fixed to one side of the cabinet door through bolts, and the first temperature and humidity sensor is arranged at the top of the control panel. Under the condition that temperature and humidity balance is guaranteed, the overall damp-proof effect is improved through a multi-layer combined action. On the basis of ensuring the working stability, the propagation energy of noise is blocked and consumed, so that the overall shock absorption and noise reduction capacity is improved.

The invention relates to the technical field of composite membranes, and particularly relates to a diaphragm composite material and a preparation method thereof. The diaphragm composite material is characterized in that the diaphragm composite layer structure comprises a PEN film layer, an aluminized film layer, an aerogel layer and an elastic adhesive layer which is arranged between the PEN filmlayer and the aluminized film layer and used for bonding the PEN film layer and the aluminized film layer, and the aerogel layer is coated on one surface, far away from the elastic adhesive layer, ofthe aluminized film layer. The diaphragm composite layer is high in strength and rigidity and has better shock absorption, noise reduction, wear resistance and corrosion resistance effects and is worthy of popularization and application.

The invention discloses a washing machine footing. The footing comprises a supporting piece used for supporting on a supporting surface; the supporting piece comprises a rigid polyurethane member andan elastic polyurethane member which are integrally formed, and the elastic polyurethane member is in contact with the support surface. The washing machine footing is integrally formed by the rigid polyurethane member and the elastic polyurethane member. The structure of the washing machine footing is a whole with high strength, so that the washing machine footing cannot be damaged when being dragged; the elastic polyurethane material can generate larger deformation force under the condition of slight transverse expansion, and larger grip force is generated; and the polyurethane material has small permanent deformation. The washing machine footing makes full use of the polyurethane technology, the overall system safety of a washing machine and durability of the washing machine footing areimproved, better shock absorption and noise reduction effects are brought, and better use experience is provided for users.

The invention provides a damping and noise reducing device for a steering pull rod inner ball joint assembly, which is used for reducing noise of a steering gear, improving the NVH (Noise, Vibration and Harshness) performance of an automobile and prolonging the service life of the steering gear. The damping and noise reducing device comprises a ball, an inner ball cup, a rack and a limiting sleeve, wherein the inner ball cup is fixedly connected with the tail end of the rack; the limiting sleeve is sleeved on the rack; a sleeve is further arranged between the front end face of the inner ball cup and the tail end face of the rack; the sleeve is sleeved on the front end part of the inner ball cup; and a spring and an elastic support mechanism of a gasket are arranged between the front end face of the inner ball cup and the inner end face of the sleeve. According to the damping and noise reducing device, the movable sleeve is arranged at the joint of the inner ball cup and the rack, one end of the movable sleeve is sleeved on the inner ball cup, the other end of the movable sleeve is limited through the tail end face of the rack, and the elastic support mechanism is arranged in the sleeve, so that rigid collision between the pull rod inner ball joint assembly and a steering gear shell limiting sleeve is changed into flexible contact, and component wear and noise caused by collision are reduced.

The invention relates to the technical field of power generators, and discloses a power generator good in noise reduction performance. The power generator comprises a bottom plate fixedly installed onan automobile cylinder body, and a moving plate fixedly connected to the upper surface of the bottom plate; two installation frames are fixedly connected to the upper surface of the moving plate andfixedly connected with the same power generator main body through bolts; the upper surface of the bottom plate is fixedly connected with the lower surface of the moving plate through a plurality of buffering devices which are the same in structure; each buffering device comprises a buffering barrel fixedly connected to the upper surface of the bottom plate, the outer wall of the buffering barrel is movably sleeved with a sleeve fixedly connected with the lower surface of the moving plate, the upper surface of the buffering barrel is provided with a first through hole, and a moving rod fixedlyconnected with the moving plate is movably connected into the first through hole in a sleeved mode. According to the power generator good in noise reduction performance, shock and noise reduction canbe efficiently achieved, the driving comfort level of a person in an automobile is improved, the orientation of the power generator main body can be conveniently adjusted, and power generator main body installing is facilitated.

The invention discloses a noise-reduction and shock-absorption device for electromechanical equipment in the metallurgical production industry. The noise-reduction and shock-absorption device comprises a shock-absorption seat; a shock-absorption groove is formed in the shock-absorption seat, a supporting seat is arranged at the top of the shock-absorption groove, and the electromechanical equipment is mounted and arranged at the top of the supporting seat; shock-absorption mechanisms are symmetrically arranged at the bottom of the supporting seat, and a connecting column is fixedly arranged atthe middle end of the bottom of the supporting seat; one end of the connecting column penetrates through a sleeve and extends into the sleeve to be fixedly connected with a limiting plate; the sleeveis fixed into the shock-absorption groove, limiting grooves are symmetrically formed in the sleeve, and matched limiting blocks are arranged in the limiting grooves; the two ends of the limiting plate are fixedly connected with the limiting blocks correspondingly; and a first damping spring is arranged between the bottom of the limiting plate and the inner wall of the sleeve in a fixedly-connected mode. The noise-reduction and shock-absorption device has the beneficial effects that under cooperation of the limiting grooves, the limiting blocks and the limiting plate, the first damping springplays a good role in shock-absorption buffering, and noise-reduction and shock-absorption properties are further improved.

The invention relates to the field of rail damping and denoising, in particular to a damping jacket for a railway rail and an assembly method thereof. The damping jacket for the railway rail comprises an expansion layer clung to the rail base and rail web of the railway rail, wherein a coating is formed outside the expansion layer, sealing layers are formed at two ends of the expansion layer and the coating, a closed space is formed by the expansion layer, the coating and the sealing layers, and the closed space is filled with liquid damping material. The assembly method comprises the steps as follows: (1) connecting the expansion layer, the coating and the sealing layer at one side together; (2) injecting the liquid damping material to a cavity; (3) arranging the other sealing layer at the opening position; (4) sleeving the damping jacket from one end of the railway rail; and (5) arranging sleepers at the bottom of the railway rail. According to the invention, the damping jacket filled with the damping material is coated on the rail, and the damping material has the damping and the denoising functions, so that the wheel rail noise generated by the rail vibration is effectively reduced.

The invention discloses a shock-absorbing noise-reducing reinforced engine rear suspension which comprises a large bushing (1), a small bushing (2) and a connecting plate (3). The large bushing (1) and the small bushing (2) are arranged in a left-and-right interval mode, the axis of the large bushing (1) and the axis of the small bushing (2) are perpendicular to each other, and the connecting plate (3) is arranged between the large bushing (1) and the small bushing (2), enables the large bushing (1) and the small bushing (2) to be connected to be a whole and is a punching plate with the concave section. A flat plate (4) is welded to the opening portion of a concave cavity of the connecting plate (3) to seal the open end of the connecting plate (3), the left end of the flat plate (4) is connected with the large bushing (1), and the right end of the flat plate (4) is connected with the small bushing (2). The flat plate is welded to the connecting plate to seal the open end of the connecting plate, on one hand, the integral strength of the rear suspension can be improved, on the other hand, first-order modal frequency of the rear suspension can be improved, and the shock-absorbing noise-reducing effect of the rear suspension is remarkably improved.

The invention discloses an air conditioner shock absorption support which comprises a bottom plate, a top part and a supporting part, wherein the top part is used for being connected with an air conditioner, the supporting part is arranged between the bottom plate and the top part, and the bottom plate, the top part and the supporting part define a shock absorption cavity. Through the arrangement, the air conditioner shock absorption support can effectively reduce sympathetic vibration of a wall caused by vibration of an outdoor unit, and can effectively reduce noise generated by the outdoor unit at the same time.

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 relates to the field of highway transportation, in particular to a semi-trailer airbag intermediately-arranged suspension device. The suspension device comprises a front axle mechanism, a middle axle mechanism, a rear axle mechanism, hoisting mechanisms, connecting rods, a first lever, a second lever and mounting supports. The left end of the front axle mechanism is hinged to the corresponding mounting support; the right end of the front axle mechanism (1) is connected with the left end of the first lever through the corresponding connecting rod; the left end of the middle axle mechanism is hinged to the right end of the first lever; the left end of the rear axle mechanism is connected with the right end of the second lever through the corresponding connecting rod; the right end of the rear axle mechanism is hinged to the corresponding mounting support; the hoisting mechanisms are located above the front axle mechanism and the rear axle mechanism correspondingly; and the hoisting mechanisms are fixedly connected with a trailer body and in elastic connection with the front axle mechanism and the rear axle mechanism. One ends of the front axle mechanism, the middle axle mechanism and the rear axle mechanism are fixed and connected in a hinged mode, uniform force of the front axle mechanism, the middle axle mechanism and the rear axle mechanism is guaranteed, and the good damping and noise reduction effects are also achieved.

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 discloses a large-tonnage integral cab structure. A cab welding assembly is mainly formed by welding a framework and sheet metal parts, and lug plate reinforcing ribs are welded to the connecting positions of the framework. A whole cab is in a streamline type. The cab has certain strength, can be used under coal mines and in mines with bad road conditions, and is beautiful in appearance molding. A framework type rolling preventing structure is adopted, the structure is formed by welding special-shaped pipes and rectangular pipes, a bottom framework body is a reinforced rectangular pipe, and the strength of the cab is guaranteed. A front wall is formed by being stamped by a die, a covering piece is welded to the framework, the sealing performance is good, shock absorption and noise reduction are achieved, welding of the framework and the sheet steel parts is located through process steps of the structures of themselves, and the framework welding assembly structure has the functions of preventing rolling and object falling.

The invention discloses a noise reduction and elimination type box-type substation shell. The shell comprises an outer shell, a top cover, a supporting base and supporting legs, the top cover is fixedto the top of the outer shell, the supporting base is fixed to the bottom of the outer shell, heat dissipation holes are formed in the supporting base, the top cover and the supporting base enclose the outer shell into a closed box-type structure, and the supporting legs are fixed to the bottom end face of the supporting base; the outer shell is formed by sequentially connecting four wallboards,a movable door is connected to any wallboard, a sound absorption patch is bonded to the movable door, each wallboard comprises a sound attenuation layer, an electromagnetic shielding layer, a vacuum layer, a heat dissipation layer and an outer protection layer which are sequentially arranged from inside to outside, and the sound absorption layers, the electromagnetic shielding layers, the vacuum layers, the heat dissipation layers and the outer protection layers are fixedly connected with one another. The noise reduction and elimination type box-type substation shell is simple in structure, reasonable in design, high in overall structure compactness, good in sound insulation and noise reduction performance, high in heat dissipation efficiency, high in use safety and good in market application prospect.

The invention discloses a laser cutting device for cutting an acrylic sheet, and belongs to the technical field of precision machining, the laser cutting device comprises a platen, a cleaning laser cutting assembly is arranged on the platen, a sound insulation box is fixed at the bottom of the platen, buffer pipes are uniformly arranged at the bottom of the sound insulation box, first springs are fixed on the inner top walls of the buffer pipes, and the first springs are fixed on the inner top walls of the buffer pipes. A disc is fixed to the bottom of each buffer pipe, connecting rods are evenly arranged at the bottoms of the discs, sliding pipes are hinged to the bottom ends of the connecting rods, buffer rods are slidably connected into the sliding pipes, the outer sides of the buffer rods are sleeved with second springs, and one ends of the second springs are fixedly connected with one sides of the sliding pipes. A multi-stage damping mechanism can be formed, the good damping and noise reduction effects are achieved, the purpose of protecting stable operation of equipment installed on the workbench is achieved, noise generated during production and machining is greatly reduced, the quality of the working environment is improved, and therefore the production and machining requirements of people are met.

The invention relates to the technical field of damping and noise reduction, in particular to a damping and noise reduction device of an axial flow fan for a ship. The damping and noise reduction device comprises a fixing seat and a base, wherein the fixing seat is used for installing and fixing the fan, the base is arranged below the fixing seat, and the fixing seat is supported by the base through at least one first damping element. The damping and noise reduction device is simple in structure, safe and reliable and can achieve the good damping and noise reduction effects.