108 results about "Noise polution" patented technology

The invention discloses a noise reduction type disrotatory fog gun, and relates to the technical field of environmental protection. The noise reduction type contra-rotating fog gun comprises an air guide barrel, a first sound absorption barrel, a contra-rotating air outlet device and a spraying device. The first sound absorption cylinder is arranged in the air guide cylinder, a first sound absorption cavity is formed between the first sound absorption cylinder and the air guide cylinder, a plurality of first sound absorption holes are densely formed in the first sound absorption cylinder, the first sound absorption holes communicate with the first sound absorption cavity, the contra-rotating air outlet device is installed in the first sound absorption cylinder, and the spraying device is installed at the air outlet end of the air guide cylinder; the contra-rotating air outlet device comprises a driving part, a first impeller, a reverse transmission assembly and a second impeller, the driving part is connected with the first impeller, the reverse transmission assembly is connected between the first impeller and the second impeller, and the first impeller and the second impeller are coaxially arranged. According to the noise reduction type disrotatory fog gun, long-distance water mist blowing can be achieved, the operation requirements of different scenes are met, noise can be effectively reduced, and noise pollution is relieved.

The utility model provides a kind of sound insulation and noise reduction composite air pipe structure, it is related to composite air pipe technical field, including composite air pipe assembly, sound insulation component is provided on the composite air pipe assembly, the side of the composite air pipe assembly is provided with mounting assembly, the composite air pipe assembly includes air pipe main body and protective support cover.The utility model is by sound absorption box and is set in the inside of air pipe main body, cooperate sound absorption hole is favorable to absorb part noise, in turn is favorable to weaken part noise, by sound insulation board and is set in the outside of air pipe main body, it is favorable to further weaken noise, reduce its diffusion to outside, by both part is favorable to realize sound insulation and noise reduction, reduce noise transmission to external environment, in turn reduce noise pollution, by the outside of protective support cover is provided with buffer pad, it is favorable to absorb part vibration when air pipe main body operates, reduce vibration diffusion to building structure by support.

The utility model relates to the technical field of lubricating oil pumps, and discloses a lubricating oil pump for a gearbox, which comprises a shell, the top end of the shell is connected with a top cover through a magnetic component, the inner wall of the shell is fixedly connected with a sound insulation pad, the inner wall of the shell is fixedly connected with a pump body, and the left end of the pump body is provided with a driving shaft. A first oil inlet pipe is fixedly connected to the right end of the pump body, a first fixing ring is fixedly connected to the outer wall of the first oil inlet pipe, a second fixing ring is arranged at the right end of the first fixing ring, a second oil inlet pipe is fixedly connected to the inner wall of the second fixing ring, and first clamping rings are arranged on the outer walls of the first fixing ring and the second fixing ring. According to the lubricating oil pump, when the filter plate needs to be maintained and replaced, operation is easy and convenient, complex tools and professional skills are not needed, the maintenance time and cost can be saved, the maintenance efficiency of equipment is improved, the sound insulation pad is arranged on the inner wall of the shell, noise generated when the pump body operates is effectively absorbed, and noise pollution generated when the lubricating oil pump works is reduced.

The invention discloses a double-layer learner integrated model for predicting the porosity of mixed shale, and relates to the technical field of mixed shale porosity evaluation. According to the technical scheme, the method comprises the following steps that S1, logging data with high correlation with the actually-measured porosity are selected; s2, constructing an optimal learning device; and S3, constructing a double-layer learner integration model. According to the method, the logging data with high correlation with the porosity are preferably selected through a principal component analysis method, so that noise pollution caused by input of a large amount of logging data is avoided; the optimal hyper-parameter value of the machine learning model is searched by using a particle swarm optimization (PSO) algorithm, so that the learning ability of a base learner is improved to the greatest extent; the base learner is used as the first layer learner of the integrated model, and the meta learner of the second layer is combined, so that the integrated model of the double-layer learner is constructed, the purposes of improving the model prediction precision and evaluating the vertical heterogeneity of the pores of the mixed shale reservoir are achieved, and the purpose of guiding unconventional oil-gas exploration and development of the mixed shale is achieved.

The utility model relates to the technical field of noise pollution prevention and control, in particular to a sound insulation screen for preventing and controlling noise pollution, which comprises a sound insulation mechanism for preventing and controlling noise pollution, and a fixing mechanism for fixing rotating equipment is arranged above the sound insulation mechanism. By arranging the sound insulation mechanism and the fixing mechanism, when a certain sound insulation plate is damaged and needs to be disassembled, a knob is rotated, the knob drives a bidirectional threaded rod to rotate, the bidirectional threaded rod rotates to drive two movable blocks to get away from each other, the movable blocks drive movable rods to move, and the left movable rod and the right movable rod also get away from each other; the movable rods move to be separated from the limiting assemblies, then the inserting rods are detached from the limiting assemblies, limiting of the sound insulation plates is relieved through the limiting assemblies, finally, the damaged sound insulation plates are detached, all the sound insulation plates in the device can be detached independently, the detaching process is convenient and rapid, and the using effect of the device is effectively improved.

The utility model relates to the technical field of centrifugal fans, and discloses a low-noise centrifugal fan which comprises a base, a shell is fixedly connected to the outer wall of the base, a rotor is installed in the shell, a motor is installed on the outer wall of the top of the base, and the tail end of an output shaft of the motor extends into the shell and is fixedly connected with the rotor. The rotor comprises a hub and a plurality of blades evenly distributed on the outer wall of the hub, the front edges of the blades are provided with arc-shaped flow guide edges, the rear edges of the blades are provided with sawtooth grooves, a damping mechanism is installed between the base and the motor, and the base is connected with the motor through the damping mechanism. And starting from the key part of the interaction of the airflow and the impeller, the pneumatic noise and the vortex noise are greatly reduced, and the noise pollution condition during the operation of the fan is effectively improved.

The noise reduction type vacuum pump comprises a vacuum pump main body and a driving motor, a mounting groove is formed in the side wall of the vacuum pump main body, a damping and noise reduction mechanism is mounted on the vacuum pump main body, and the damping and noise reduction mechanism comprises a plurality of damping grooves symmetrically formed in the vacuum pump main body; the inner walls of the multiple damping grooves are in sealed sliding connection with multiple damping rods, the other ends of the multiple damping rods penetrate through the inner wall of the mounting groove and are fixedly connected with the side wall of the driving motor, the side wall of the driving motor is fixedly connected with multiple damping springs, and the multiple damping springs are arranged on the side walls of the multiple damping rods in a sleeving mode correspondingly; a plurality of first cavities are formed in the vacuum pump body. Vibration generated in the operation process of the driving motor can be buffered and consumed, so that the vibration is relieved, noise is indirectly reduced, the first sound receiving groove and the second sound receiving groove can also absorb the noise, the noise is further reduced, and noise pollution is avoided.

The utility model discloses a low-noise cross-flow cooling tower which comprises a tower body, a controller fixedly connected to the upper portion of the tower body, fan blades rotationally connected to the upper end of the controller, a shell fixedly installed at the outer ends of the fan blades, and a sound insulation cover fixedly connected to the outer end of the shell. A fixing plate is fixedly mounted on the outer side of the sound insulation cover, and a buffer spring is fixedly connected to the lower end of the fixing plate; the mounting plate is fixedly connected to the inner wall of the tower body, a groove is fixedly formed in the upper end of the mounting plate, a buffer plate is fixedly connected to the front end of the mounting plate, and sound-absorbing cotton is fixedly mounted in the buffer plate, so that the problems that impact noise is generated by impact force of flow on the inner wall of the tower body in the background technology, and noise is caused are solved; and the fan rotates to exhaust hot air in the cooling tower, and when the fan is started, the fan vibrates to generate a large amount of noise, so that eardrums of workers are damaged subsequently.

The utility model relates to the technical field of wake flow breaking and noise reducing devices, and discloses a wake flow breaking and noise reducing device which comprises a barrel body, a first connecting piece and a second connecting piece, one side of the inner wall of the barrel body is provided with an internal thread, the outer side of the end face of one side of the barrel body is fixedly connected with annular teeth at equal intervals, and the outer wall of the barrel body is provided with windows at equal intervals. A plurality of windows are formed in the barrel body, strip-shaped teeth are arranged on the two sides of the interiors of the windows, every two strip-shaped teeth are oppositely arranged, a cylindrical through hole is formed in the barrel body, the side, provided with the internal threads, of the barrel body is an inlet of the barrel body, and the side, provided with the annular teeth, of the barrel body is an outlet of the barrel body. According to the utility model, through the design of the annular teeth at the outlet and the strip-shaped teeth at the window of the barrel body, the fluid is effectively shunted and gently adjusted, and turbulent flow and vortex are obviously reduced, so that the noise is reduced, the environmental comfort is improved, the noise pollution control standard is met, and a quiet and harmonious environment is created for a user.

The utility model discloses a plastic pipe assembly flat grinding machine, which comprises a flat grinding bottom plate, two steel structure supports and a flat grinding motor, one side of the top end of the flat grinding bottom plate is fixedly connected with the flat grinding motor through the supports, the output end of the flat grinding motor is fixedly provided with a transmission connecting shaft, and one end of the transmission connecting shaft is fixedly provided with a port flat grinding disc. A square connecting frame is mounted on the other side of the top end of the flat grinding bottom plate, a sliding connecting groove is formed in the inner side wall of the square connecting frame, and a scrap suction and noise reduction assembly is slidably mounted in the sliding connecting groove; due to the fact that the scrap absorbing and sound reducing assembly is arranged in the square connecting frame in the sliding mode, and the scrap absorbing and sound reducing assembly is composed of the right dust adhering screen cloth, the foam absorbing plate and the porous sound absorbing inner plate, scraps generated in the plastic pipe flat grinding process can be collected, noise generated in the flat grinding process can be reduced, the overall noise pollution is low, and the working environment can be optimized conveniently.

According to the dust fall and noise reduction type drilling device for one-time forming of the wall decoration holes, a combined drill bit is arranged outside the left end face of an electric drill body, the combined drill bit is connected with a motor in the electric drill body through a transmission assembly, and the motor drives the combined drill bit to rotate through the transmission assembly; the left end of the electric drill body is provided with a dust collection and noise reduction device which covers the combined drill bit and is always attached to the wall face to collect dust in the drilling process of the combined drill bit, and the exposed length of the combined drill bit is adjusted by adjusting the length of the dust collection and noise reduction device. A laser sensing device used for measuring and displaying vertical coordinate and horizontal coordinate data of a wall aiming point position is installed on the top of the electric drill body. The structure of the connecting position of the drill bit of the handheld drill is optimized, one-time forming of the quincunx-shaped decorative hole can be achieved, the effect of reducing dust pollution and noise pollution is achieved, the structure is simple, positioning is accurate, the edge is neat, pollution is reduced, the forming effect is good, quality is high, and secondary repairing is not needed.

The utility model relates to the technical field of punching aluminum plates, in particular to a punching aluminum plate with a noise reduction interlayer, which comprises a first plate body and a second plate body, a containing groove is arranged on the inner side of the back face of the first plate body, and a hole is arranged on the front face of the first plate body and communicated with the containing groove on the back face of the first plate body. A fixing assembly is arranged between the edge of the first plate body and the edge of the second plate body. In the using process of the aluminum plate structure, noise generated indoors can be conducted into the containing groove through the holes in the front face of the first plate body, so that the sound absorption cotton piece in the containing groove can absorb the generated noise, the noise is prevented from being conducted into an indoor wall, and the aluminum plate structure has the good noise reduction and sound insulation effects; the hollow sound insulation cavity can further reduce the noise transmitted to the wall on the back side of the second plate body through the second plate body, so that the structure can effectively prevent the indoor noise from being transmitted to the indoor wall, the indoor noise is absorbed, and the indoor and outdoor noise pollution is reduced.

Embodiments of the application disclose a highway acoustic control method, a layout method, an edge controller and a system. The highway acoustic control system adopts a "cloud-edge-end" architecture, various types of acoustic devices and information collection devices are deployed along the highway, the edge controller is deployed at the edge, and the server is deployed in the highway command center. The edge controller dynamically analyzes the noise information collected by the information collection device through the acoustic control algorithm and the acoustic recognition algorithm, and adjusts the output volume of the acoustic device. The server can uniformly schedule and control all acoustic devices in the road network through multiple edge controllers. The edge controller of the application can ensure that the driver and passenger can clearly and completely obtain the warning information, avoid damage caused by the acoustic device playing at high volume all the time, and reduce noise pollution to residential areas by implementing the highway acoustic control method and the layout method.

The utility model belongs to the technical field of swing check valves, and particularly relates to a swing check valve capable of buffering water flow and reducing noise, which comprises a valve body, a valve cover is arranged at the top of the valve body, four screws are in threaded connection with the top of the valve cover, the valve cover is fixedly connected to the top of the valve body through the four screws, a barrel is fixedly connected to the valve cover, and a valve rod is arranged on the barrel. A lifting plate is arranged in the cylinder in a sliding mode, and a deflection angle adjusting mechanism is arranged between the lifting plate and the cylinder. The swing check valve is reasonable in structural design, the deflection angle of the valve clack is conveniently adjusted by adjusting the height of the buffer ball, the practicability of the device is improved, the valve clack can be buffered and protected by arranging the buffer ball and the buffer spring, damage caused by collision between the valve clack and the valve body is avoided, the service life of the swing check valve is prolonged, and the service life of the swing check valve is prolonged. And through the sound insulation layer and the sound absorption layer, the valve body has the sound insulation, sound absorption and noise reduction effects, and noise pollution is avoided.

The present application belongs to the field of ejector, the existing steam ejector contains Laval nozzle structure, the supersonic steam formed by the structure produces huge noise pollution, the factory noise is seriously overproof, the present application discloses a kind of low-noise steam ejector with sawtooth nozzle and annular groove and noise reduction method, low-noise steam ejector includes Laval nozzle, straight pipe section, suction chamber, mixing chamber and diffuser chamber.Laval nozzle nozzle end surface uses sawtooth structure, mixing chamber inner wall surface uses annular groove structure.Main stream steam forms supersonic flow after passing through Laval nozzle, and after mixing uniformly with secondary flow steam in suction chamber and mixing chamber, it is discharged from outlet after passing through diffuser chamber.Supersonic flow in ejector produces huge aerodynamic noise, and the sawtooth structure of nozzle end surface and the annular groove structure of mixing chamber inner wall surface can intensify fluid disturbance, make large-scale vortex break into multiple small-scale vortex, and then play obvious noise reduction effect.

A soundproof dog kennel includes a housing with noise-dampening walls and a noise-dampening door for dog ingress / egress. One or more walls has a ventilation assembly with noise-dampening baffles that permits inflow of breathable air with dampened sound waves when the door is closed, featuring hollow corridors, an air intake end, and an exhaust end. Fans force air through the sound-dampening ventilation ducts to reduce ambient noise while removing stale air. The kennel is equipped with cameras, carbon dioxide sensors, and other safety and monitoring devices. A smartphone application enables remote monitoring through live camera feeds, real-time sensor data display, and remote control of kennel functions. The system can automatically open the door if air quality or temperature reaches predetermined thresholds. This kennel protects dogs from noise pollution sources like fireworks, engines, and airplane auxiliary power units, providing a safe, quiet, and remotely monitored space for dogs.

The utility model belongs to the field of sports place equipment, particularly relates to an area sound source consonant device used in a large sports place, and aims to solve the problems that an existing sound field overflows, noise pollution is caused to the surrounding environment, the working and sleeping quality of nearby residents is seriously influenced, and the hearing of teenagers is also badly influenced, and the following scheme is provided: the area sound source consonant device comprises a fixed frame, a waterproof decoration face is fixedly arranged on one side of the fixing frame, two symmetrically-arranged mounting plates are fixedly arranged at the bottom end of the other side of the fixing frame, the same back plate is inserted between the two mounting plates, a sound absorption plate is fixedly arranged on one side of the back plate and located in the fixing frame, and two top plates are fixedly arranged at the top end of the back plate. The bottom of the top plate makes contact with the surface of the fixing frame. The vibration sounding plate is arranged on the inner side of the fixing frame. According to the utility model, the sound field range can be effectively controlled, noise disturbing residents caused by sound overflow can be prevented, people can conveniently and quickly mount and dismount the structure, and convenience is provided for later maintenance.

The invention provides a wafer MEMS air pump based on a PZT piezoelectric film, and relates to the technical field of MEMS and fluid control, the wafer MEMS air pump comprises an upper plate, a middle plate and a lower plate, the top of the middle plate and the bottom of the upper plate are mutually bonded and connected based on an Au-Sn eutectic bonding part, and the middle plate and the lower plate are connected in a covalent bonding mode adopting PDMS pretreatment. The invention is suitable for various small and miniature portable equipment and other application scenes, adopts an MEMS (Micro-Electro-Mechanical System) integrated process, does not need to be assembled, and is good in process consistency and low in batch production cost; the working frequency of the core PZT piezoelectric film resonator is high (usually in an ultrasonic frequency band), ultrasonic waves generated by vibration cannot be heard, and compared with a traditional mechanical miniature air pump in a noise-pollution-free preparation mode, the miniature air pump is simple in structure, good in impact resistance and not prone to damage.

The utility model discloses a diesel generating set intelligent damping base which comprises a shaking platform, the shaking platform is sleeved with a movably-connected collision shell, the lower end of the shaking platform is movably connected with symmetrical fixing pieces, and the lower ends of the fixing pieces are fixedly connected with a stable base. A plurality of air cylinders are movably connected to the lower end of the shaking platform, a plurality of first fixed bases are fixedly connected to the lower end of the shaking platform, a plurality of first movable bases are fixedly connected to the upper ends of the air cylinders, sealing air rods are movably connected into the air cylinders in a penetrating mode, and a plurality of second fixed bases are fixedly connected to the upper end of the stable base. Symmetrical jet motors are fixedly connected to the upper end of the stable base, and a rotating motor is fixedly connected to the upper end of the stable base. Through the structure, vibration of different frequencies is accurately restrained, the damping effect is improved, the damping flexibility is guaranteed, the overall structural stability is enhanced, unit abrasion is reduced, and noise pollution is reduced.

The utility model relates to the technical field of bridge noise reduction, and discloses a mechanical noise reduction device for a municipal road bridge, the mechanical noise reduction device for the municipal road bridge comprises a bridge base plane, a telescopic device and a noise reduction mechanism, the arc angle is designed to be smooth, so that vehicle tires can stably pass through, additional abrasion to the tires is avoided, and the noise reduction effect is good. The first connecting plate is connected with the buffer plate and other parts of the noise reduction mechanism, and it is ensured that the whole device has enough stability during noise reduction. According to the mechanical noise reduction device for the municipal road bridge, through the combined action of the buffer plate, the hydraulic device and the spring, when a vehicle passes, the buffer plate is compressed, the hydraulic device and the spring jointly absorb the impact force of the vehicle to the device, and noise generated by contact between tires and a bridge expansion joint is effectively reduced; meanwhile, due to the arc angle design of the buffer plates, the tires are in smooth transition during contact, impact during high-speed driving is reduced, and noise pollution caused by expansion joints is greatly reduced through the overall structure.

The utility model relates to stair guardrail technical field, specifically disclose a kind of stair guardrail of quick assembly, including stair body, the guardrail of installation in stair body upper end, the guardrail includes multiple stand and the handrail fixedly connected in multiple stand top, the stand includes support section and the connecting section of detachable connection in support section bottom end, by embedding sleeve in step, cooperation stand bottom end telescopic locking's connecting section structure, avoid the damage of on-site drilling to the decorated step surface, significantly improve installation efficiency and reduce dust noise pollution;Mechanical locking of plug-in column and embedded sleeve is realized by using screw rod driving wedge, connection firm and reliable and easy to operate;Spring auxiliary plug-in column automatic reset, it is convenient to quick nondestructive disassembly and maintenance;The threaded connection design of support section and connecting section facilitates height adjustment and component replacement, realize stair guardrail stand efficient, nondestructive, stable installation and disassembly, especially suitable for after decoration or reconstruction project.

A mute vibration anode forming mold is provided with a mold body and a noise reduction coating assembly, and the mold body is coated with the noise reduction coating assembly. When the mute vibration anode forming mold is used, the mold body is coated with the noise reduction coating assembly, and when vibration forming is conducted on an anode carbon product, noise generated by the mold body can be isolated, noise pollution to the workshop production environment is reduced, and harm of the noise to the human body is reduced.

This invention provides a sound-insulating and waterproof material and its preparation method. The sound-insulating and waterproof material includes a composite material and a waterproof material, wherein the waterproof material coats the composite material, and the water contact angle of the waterproof material is >90°. The composite material includes a first composite layer and a second composite layer, with the first composite layer coating the second composite layer. The first composite layer includes lignin fibers, which are obtained by electrospinning lignin and a polymer. The second composite layer includes straw with a particle size of 0.1–1 mm. The sound-insulating and waterproof material provided by this invention, through its specially designed structure, possesses excellent sound insulation and waterproof performance. Furthermore, this invention improves noise pollution by utilizing agricultural waste, which not only conforms to environmental protection principles but also enhances economic benefits.

The utility model relates to the technical field of noise reduction, in particular to an air source heat pump noise reduction device which comprises an air source heat pump body, the bottom of the air source heat pump body is in threaded connection with a transverse plate through bolts, and the outer side of the transverse plate is in sliding connection with a connecting box. An air source heat pump body drives a transverse plate to move downwards, the transverse plate drives a sliding block to slide in a sliding groove through a vertical rod, the vertical rod drives a triangular block to move to extrude a first ball, the first ball drives a moving block to move through a transverse rod to compress a first spring, and a transverse rod belt extrudes a connecting rod through a connecting block; and a connecting rod drives a rectangular block to move upwards to stretch a second spring, so that the buffering effect is achieved, when the air source heat pump main body works, vibration reduction and buffering operation can be effectively conducted on the air source heat pump main body, large noise pollution is avoided, and meanwhile the service life of the whole air source heat pump is prolonged.

The utility model provides a low-noise energy-saving waste rubber grinding device, which belongs to the field of rubber processing, aims to solve the problems of low grinding efficiency and poor quality caused by noise generated by operation of a grinding component and an unreasonable grinding structure, and comprises a device base, a driving motor is fixedly installed in the middle of the bottom of the device base, a movable grinding disc is rotationally connected to the end face of the top of the device base, the middle of the bottom of the movable grinding disc is fixedly connected with the top of a driving shaft of the driving motor, and a feeding hopper is arranged at the top of the movable grinding disc in a suspended mode. Four collecting hanging grooves are formed in the outer side of the device base in a surrounding manner; according to the low-noise energy-saving waste rubber grinding device, the interior of the outer side wall of the feeding hopper is hollow and filled with sound insulation cotton, outward transmission of noise generated in the grinding process can be effectively reduced, noise pollution in the working environment is reduced, and a relatively quiet working environment is provided for operators.

The utility model discloses a three -phase asynchronous motor with mute function relates to three -phase asynchronous motor technical field, the utility model discloses a three -phase asynchronous motor still includes: noise reduction mechanism, noise reduction mechanism sets up in the tail of three -phase asynchronous motor, and noise reduction mechanism is used for the noise of tail portion to carry out noise reduction, and sound absorption mechanism, sound absorption mechanism sets up in the output site of three -phase asynchronous motor, the utility model discloses the dust cover is positioned and is inserted with the positioning boss through the U -shaped block of inside, then the dust cover is fixed through screw, and the dust cover is limited with the cooperation of U -shaped block and positioning boss, reduces the shaking of dust cover, and the rubber pad can play the effect of shock attenuation when shaking, improves the mute effect, and the sound absorption cotton is in the rotation of radiating fan, absorbs the noise generated, improves the mute effect again, reduces the noise pollution in working environment greatly, thereby guarantees the comfort degree of staff.

The utility model discloses a noise reduction shell of a power takeoff, which belongs to the technical field of power takeoff shells, and comprises a base and a main body, a first sound insulation strip is arranged between a first shell and a second shell, the interiors of a first cavity and a second cavity are filled with sound absorption cotton, the right end face of the first shell is fixedly connected with a first sound insulation cover, and the right end face of the second shell is fixedly connected with a second sound insulation cover. The left end face of the second shell is fixedly connected with a second sound insulation cover, noise generated in the first shell and the second shell is absorbed through sound absorption cotton, noise pollution at the joint of the first shell and the second shell is reduced through a first sound insulation strip, and noise pollution at the joint of a clamping groove and a clamping plate is reduced through a second sound insulation strip. Noise generated at the joint of the main body and the first shell and the joint of the main body and the second shell is isolated through the first sound insulation cover and the second sound insulation cover, noise pollution of the power takeoff is effectively reduced, adverse effects on workers are reduced, and the power takeoff has the advantages of being capable of effectively reducing noise pollution, simple in structure and convenient to install.

This utility model discloses a vibratory feeder feeding mechanism, relating to the field of vibratory feeder technology. It includes a base plate and a mounting base with vertical mounting supports. At least three asymmetrically distributed damping units are arranged between the base plate and the mounting base. Each damping unit consists of an upper connecting seat, a lower connecting seat, and a composite damping body. A single through-type wave-shaped metal skeleton is embedded inside a solid columnar upper high-damping rubber component, with the upper and lower ends of the skeleton fixed to the upper and lower connecting seats, respectively. A lower low-hardness silicone component is vulcanized and bonded to the bottom surface of the rubber component. An axial locking rod passes through its central through-hole, with the top of the locking rod fixing the lower end of the skeleton and the bottom end connecting to the lower connecting seat, forming an annular gap between the locking rod and the through-hole. This device, through the synergistic effect of wave-skeleton bending energy dissipation, double-layer rubber component damping conversion, and gap dynamic compensation, blocks most of the vibration energy transmission, solving the problems of resonance and noise pollution in traditional vibratory feeder frames.

The utility model discloses a noise reduction device for coal preparation plant chute, including installation support, still include buffer board, and the buffer board is rotatoryly installed below the lowest end of the transfer chute body, and the lowest end of buffer board is supported to set up damping device. The utility model discloses through the buffer board of elastic setting can change angle and buffer of the discharge end of transfer chute body to reduce the impact force of material at chute export position to avoid the violent impact of material direct delivery to the inside component of chute, and the problem of the serious noise pollution, the accelerated wear and tear of equipment key part, the shortened service life of further causing is avoided, through the setting filling cotton block below the transfer chute body, the elastic support is carried out to the transfer chute body, and the vibration frequency of transfer chute body is reduced, and the vibration noise of transfer chute body can also be absorbed.

According to the brake for the transmission, when the brake is used, abrasion and noise caused by relative movement between the intermediate shaft serving as a rotating part and the piston of the brake do not exist, and compared with the prior art, noise pollution is reduced. In addition, due to the fact that the installation positions of the dual discs are optimized, the intermediate shaft can be designed to be of a hollow structure, the overall mass is reduced, meanwhile, the structure of a brake piston is simplified, the effect of reducing the machining and manufacturing difficulty is achieved, and the brake piston is suitable for large-scale application and popularization in the industry.