336 results about "Noise pollution" patented technology

The invention discloses a road environment semantic segmentation method based on cross-modal difference modulation and a visual basic model, and the method is based on a DINOv3 visual basic model of a frozen weight, and introduces a complementary difference fusion module and a bidirectional context flow alignment module through the design of double-flow frozen coding and difference perception interaction. According to the method, a cross attention weight is generated by calculating a local high-frequency difference, so that transverse anti-noise complementation of RGB texture information and a Depth geometric structure is realized, and single-mode noise pollution is effectively inhibited; the two-way cross-scale alignment mechanism of top-down space mask guidance and bottom-up channel feature feedback is constructed by the two-way cross-scale alignment mechanism, and the scale barrier of deep and shallow layer features is broken. Therefore, joint feature representation with deep synergy of semantics and structures is obtained, inhibition of the model to environmental noise and reservation of tiny object details are balanced in a complex road scene, and pixel-level semantic segmentation with high generalization and high precision is realized.

The invention relates to a community low altitude-oriented aircraft path planning and traffic capacity evaluation system. The system comprises an airspace facility modeling module, a facility relation judgment module, a hierarchical airspace segmentation module, a noise-speed-safe distance constraint calculation module, a dynamic obstacle marking module, a multi-target path planning module and a bottleneck identification and traffic capacity evaluation module. The method comprises the following steps: modeling airspace facilities, and judging a facility relationship based on spatial geometric attributes and function use requirements of the facilities; performing hierarchical grid division on the low altitude of the community, calculating a safety distance along the movement direction and a safety distance perpendicular to the flight direction, and performing obstacle marking on grids around the building based on the safety distances and the flight direction; and performing path search based on an improved A * algorithm, identifying a bottleneck region, extracting parameters, and calculating the maximum allowable speed of the bottleneck region and the total traffic capacity of the bottleneck region. The system can relieve environmental troubles such as safety compliance dispute and noise pollution caused by operation of the low-altitude aircraft.

The invention discloses a non-Gaussian noise pollution spiral shaft rod type part measurement signal processing method, which can realize reliable purification of measurement signals, stable separation of bending deviation and spiral raceway morphology items and fitting reconstruction when pollution such as heavy tails, multiple peaks, burrs and sheet abnormal points exists. The method comprises the following steps: acquiring and synchronously registering measurement data of rotation and axial movement, establishing a joint fitting model for decomposing readings into deformation items and spiral raceway morphology items, and expressing the morphology items by multi-order harmonics, and a three-stage process is adopted to complete baseline establishment and coarse elimination, phase locking and fine filtering in sequence, and the harmonic order of the optimal spiral raceway morphology item is determined in a self-adaptive manner and finally reconstructed. The invention provides an effective solution for the problems that the continuous rotary scanning measurement signal of the spiral shaft rod type part is unstable in recovery and is easy to distort in reconstruction under the non-Gaussian noise pollution.

The invention relates to the technical field of industrial safety, and discloses an electrolytic aluminum short circuit port key operation parameter online monitoring and explosion safety protection system which comprises a parameter real-time monitoring module, a threshold activation judgment module, a digital twin modeling module, a risk dynamic prediction module, a protection decision analysis module and an intervention scheme execution module. By constructing a multi-source signal cooperative verification mechanism, when short-circuit parameters are monitored in real time, a self-adaptive digital filtering algorithm is adopted to dynamically match magnetic field intensity and temperature disturbance characteristics, noise stripping and baseline calibration are carried out on original voltage and current signals, the monitoring accuracy of core parameters such as short-circuit resistance is ensured, false alarm triggering is avoided, and real-time monitoring of the short-circuit parameters is realized. And meanwhile, by establishing a parameter credibility scoring model, when signal distortion exceeds a tolerance threshold, a standby sensing channel is automatically switched, so that the risk of production interruption caused by noise pollution is further reduced, and the anti-interference capability and the operation stability of the system are improved.

The invention discloses an audio signal measurement method and device, an electronic device and a storage medium, and relates to the field of audio signal measurement, and the method comprises the steps: deploying a detection microphone nearby a tested device, and arranging a reference microphone in a noise field, so as to synchronously collect a mixed signal containing a test signal and noise, and a pure ambient noise reference signal. After the noise of the two signals is subjected to correlation evaluation and the consistency of noise sources is confirmed, dynamically changing noise components are accurately stripped from the signals of the tested equipment by utilizing real-time noise data acquired by the reference microphone and through an adaptive noise cancellation algorithm, so that pure test signals are restored. Therefore, the problem of non-stationary noise pollution is solved through an active signal processing means instead of depending on imperfect physical sound insulation, and accurate and efficient measurement of the performance of the microphone in a noisy environment is realized.

The invention relates to the technical field of audio signal processing, and discloses an industrial noise identification method and system, and the method comprises the steps: obtaining an audio signal, and carrying out the time-frequency decomposition, and obtaining preliminary decomposition data; classifying the coupling features of the preliminary decomposition data to obtain a coupling region boundary value; if the boundary value of the coupling region exceeds a preset boundary threshold value, performing filtering processing to obtain separated noise spectrum data; calculating an overlapping proportion of the separated noise spectrum data and a preset target sound; if the overlapping proportion causes extraction deviation, extracting dynamic change characteristics of the separated noise spectrum data and fusing the dynamic change characteristics into a spectrum extraction process to obtain an accurate noise spectrum; calculating an intensity value according to the accurate noise spectrum, and determining an intensity evaluation result; and comparing the intensity evaluation result with a preset pollution threshold, calculating a noise pollution degree and outputting a noise identification result. The method is suitable for industrial environment noise monitoring, and can accurately extract the noise spectrum.

The invention relates to the technical field of intelligent traffic equipment, in particular to an induction blind sidewalk brick, a trigger type tactile stick and a blind sidewalk cooperation system. The sensing blind sidewalk brick comprises a blind sidewalk brick body and a sensing device, wherein a cavity is formed in the blind sidewalk brick body; the trigger device is arranged on the blind sidewalk brick body and is used for receiving a trigger signal triggered by short-distance wireless induction; the sensing device is arranged in the cavity and is in signal connection with the triggering device, and the sensing device sends out a warning signal after the triggering device receives the triggering signal; wherein the trigger device is a tactile stick trigger device; a trigger signal triggered by short-distance wireless induction is sent out by the tactile stick. According to the tactile stick, a point-to-point identification relation is established through close-range induction (magnetism, metal and radio frequency), and the effect that the brick responds only when a visually impaired person carrying the tactile stick arrives is achieved; the selective triggering suppresses broadcast flooding caused by scene noise (raindrops, footsteps, baby carriages and the like), so that information fatigue and urban noise pollution are avoided.

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.

This invention discloses an intelligent aging cabinet for an automatic aging system in the audio industry, relating to the field of aging equipment technology. The aging cabinet body has an inlet and an outlet on opposite sides. A first and second isolating component intermittently unblocks either the inlet or outlet. During the process from when the audio product enters the aging station to when the aging cabinet body outputs the audio product that has completed the aging test, at least one of the first and second isolating components, together with the aging cabinet body, isolates the internal environment of the aging cabinet body from the external environment. This reduces noise pollution to the surrounding environment. Thus, while some audio products are still undergoing aging tests inside the aging cabinet, some audio products that have completed the aging test can be output from the aging cabinet body, while simultaneously inputting some audio products awaiting aging tests into the aging cabinet body. This shortens the waiting time for inputting and outputting audio products, resulting in higher overall efficiency when aging tests are performed on batches of audio products.

The utility model discloses a feed processing pulverizer which comprises an outer box, the top of the outer box is provided with a feeding hopper, the outer box is internally provided with a pulverizing assembly, and the pulverizing assembly comprises a mounting plate, a feeding pipe, a discharging pipe, a movable pulverizing disc, a movable pulverizing face, a rotating shaft, a static pulverizing disc, a static pulverizing face, an inner box and a main motor. The number of the mounting plates is two, the two mounting plates are symmetrically arranged front and back, an inner box is fixedly connected between the two mounting plates, and a feeding pipe is fixedly connected to the top of the inner box. The outer box, the feeding hopper and the crushing assembly are arranged, the space between the outer box and the inner box is filled with foam particles, generated vibration and noise can be absorbed in the crushing process, and therefore noise pollution is reduced, meanwhile, the crushing assembly is provided with a plurality of movable crushing discs and static crushing discs which are horizontally arranged, fine feed particles can be fully crushed, and the crushing efficiency is improved. And due to the arrangement of the upper layer and the lower layer, the crushing is finer.

The present invention relates to the production of a sound-insulating textile surface comprising two fabric layers laminated to each other with the coated surfaces remaining on the inner surface, while the fabric surfaces remain on the outer surface. Providing benefits such as preventing noise pollution, improving sound acoustics and increasing privacy in many sectors from construction sites to production facilities, from homes to offices, from automobiles to industrial areas. The versatility of this fabric offers significant advantages, both aesthetically and functionally.

The utility model relates to the technical field of magnetic core processing, in particular to a material pushing mechanism for magnetic core processing. The magnetic core machining pushing mechanism comprises a base, a connecting frame, a conveying belt, fixing plates, guide rods, springs, a pushing plate and the like, the connecting frame is slidably connected into the base, the fixing plates distributed front and back are fixedly connected to the top of the connecting frame, the conveying belt is rotatably connected to the outer portion of the connecting frame, and the pushing plate is slidably placed between the two fixing plates. The right side of the push plate is fixedly connected with symmetrically-distributed guide rods, the fixing plate is in sliding connection with the transversely-aligned guide rods, the guide rods are sleeved with springs used for assisting resetting, and the two ends of the springs are connected with the fixing plate and the guide rods respectively. The conveying belt is arranged to place the magnetic core, the magnetic core is pushed into the positioning mechanism of the machining equipment, the magnetic core can be prevented from being directly contacted with the base to be abraded, the integrity of the surface of the magnetic core is protected, noise can be prevented, and noise pollution in the working environment is reduced.

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 utility model discloses an air pump structure with a mute support, which relates to the technical field of air pump installation and comprises a base, an installation plate arranged on the top end face of the base, a bolt used for fixing arranged on the installation plate, an installation box fixedly connected to the installation plate, an air pump device arranged inside the installation box, and a vibration reduction component arranged at the top of the air pump device. A sound absorption component is arranged at the top of the air pump device, a supporting frame is welded to the bottom of the base, and a mute foot pad is installed at the bottom of the supporting frame. Through the arrangement of the vibration reduction assembly, the influence on other parts when the air pump device vibrates can be reduced, and noise generated by vibration when the air pump device works is reduced; through the arrangement of the sound absorption structure, noise generated when the air pump device works can be reduced, interference of the noise to the surrounding environment is reduced, a quiet working environment is created, the problem that a traditional air pump is serious in noise pollution is solved, and the air pump can be suitable for places with the high noise requirement.

The invention relates to the technical field of hub polishing, in particular to a rear axle hub special polishing device capable of preventing environmental pollution, which comprises a base, a second sound insulation layer is arranged on the base, a first sound insulation layer forming a double-layer structure with the second sound insulation layer is arranged in the second sound insulation layer, and a top cover is overturned on the second sound insulation layer. And a silencing mechanism is arranged on the second sound insulation layer, and the silencing mechanism comprises a rotating rod rotating at the center of the bottom of the second sound insulation layer. In the working process, an interlayer between the second sound insulation layer and the first sound insulation layer gradually tends to be in a vacuum environment, energy can be rapidly attenuated when sound waves are transmitted in an air rarefied medium, noise generated by polishing is rapidly attenuated, and the situation that workers are injured by the noise due to long-time work is avoided; and the pollution of noise to the environment is reduced.

The present invention relates to the production of a sound-insulating textile surface comprising two fabric layers laminated to each other with the coated surfaces remaining on the inner surface, while the fabric surfaces remain on the outer surface. Providing benefits such as preventing noise pollution, improving sound acoustics and increasing privacy in many sectors from construction sites to production facilities, from homes to offices, from automobiles to industrial areas. The versatility of this fabric offers significant advantages, both aesthetically and functionally.

The utility model provides a vibration grinding and polishing device, and relates to the technical field of polishing equipment, the vibration grinding and polishing device comprises a soundproof box provided with a box cover, a grinding and polishing box with a top opening is arranged in the soundproof box, the grinding and polishing box is fixed in the soundproof box through a plurality of vibration springs, and a vibration motor is arranged at the bottom of the grinding and polishing box; compared with the prior art, due to the fact that the sound insulation box is provided with the box cover, and the sound absorption cotton is arranged on the inner wall of the sound insulation box, the inner wall of the box cover and the outer wall of the grinding and polishing box, when the device runs, noise generated in the device is difficult to diffuse outwards directly, and the grinding and polishing efficiency is improved. Noise pollution to surrounding environments such as workshops and the like is greatly reduced, a relatively quiet working atmosphere is created for operators and surrounding areas, and hearing health of the operators is protected.

The utility model provides a high sound intensity reverberation room ventilation noise elimination channel, which is applied to the noise elimination channel technology field, and comprises a resistive noise elimination section and a reactive noise elimination section to form a composite noise elimination channel, the resistive noise elimination section comprises a sheet type silencer and a maze silencer, one end of the sheet type silencer is provided with a static pressure box group, and the other end of the sheet type silencer is provided with a static pressure box group. The other end of the labyrinth silencer is connected with a resistance silencing section, the other end of the resistance silencing section is connected with a static pressure box connecting piece, the other end of the static pressure box connecting piece is connected with a ventilation pipeline through a soft connecting piece, and the other end of the ventilation pipeline is connected with an outlet pipeline. And an anti-bird net is arranged in the outlet pipeline. According to the ventilation noise elimination channel of the high-sound-intensity reverberation chamber, the static pressure boxes are arranged at the inlet and the outlet of the composite noise elimination channel, dynamic pressure in the channel is reduced through the characteristics of the static pressure boxes, and secondary noise pollution of airflow can be reduced.

The invention provides building decoration material cutting equipment and a using method. The cutting equipment comprises a rack, and a cutting assembly, a noise reduction assembly, a chip removal assembly and a limiting assembly which are arranged on the rack; the noise reduction assembly covers the outer side of the cutting assembly and is used for reducing noise leaked during operation of the cutting assembly; the scrap removing assembly is connected with the noise reduction assembly and used for extracting and removing cutting scraps generated when the cutting assembly works. The limiting assembly is arranged on the outer side of the cutting assembly and used for limiting the building decoration materials cut by the cutting assembly. Cutting noise is effectively isolated from the source through the noise reduction assembly, cutting chippings are automatically sucked and collected through the chipping removal assembly communicating with the noise reduction assembly, and meanwhile the stability of materials is guaranteed through the limiting assembly capable of being precisely adjusted; therefore, the problems of noise pollution, chipping splashing, inaccurate material positioning and the like of existing open type cutting equipment are fundamentally solved, and the environmental protection property and cleanliness of the working environment and the safety and accuracy of operation are remarkably improved.

This utility model discloses a split-type cutting wheel using ceramic materials as the main body. It includes a semi-circular cutting wheel body, which is made of ceramic materials to form a lightweight, high-strength, and rigid main body. The main body is coated with a high-strength and high-wear-resistant coating to form an outer layer with high strength, hardness, wear resistance, impact resistance, and noise reduction performance. The combination forms a semi-circular cutting wheel structure that is lightweight, wear-resistant, has high cutting precision, and reduces noise pollution.

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 gas-liquid mixed transportation pressurization, in particular to a gas-liquid mixed transportation pressurization device which comprises a shell, a front cover and a rear cover, the front cover is installed on one side of the shell, the rear cover is installed on the side, away from the front cover, of the shell, an inlet is formed in one side of the upper portion of the shell, and an outlet is formed in the other side of the upper portion of the shell. When the supercharging device is used, the eccentric shaft drives the cock to slide tightly close to the interior of the shell, the shell forms a closed cavity which changes periodically, negative pressure is generated in the shell to suck a medium, the cock extrudes the medium in the shell to achieve the purpose of supercharging conveying, and the cock is tightly attached to the shell to reduce mechanical friction. And large torque is provided through an eccentric structure formed by the eccentric shaft, the cock and the interior of the shell, operation noise is reduced, and noise pollution generated when the device is used is reduced.

The invention relates to the technical field of environmental acoustics, discloses a road totally-enclosed sound barrier sound field prediction method and system, belongs to the field of environmental acoustics, and has very high practicability in sound field prediction and noise pollution evaluation of public road traffic noise after a totally-enclosed sound barrier is implemented. On the basis of the acoustic propagation principle, a new prediction method is provided for a road traffic noise source and a totally-closed sound barrier, a sound field is divided into two subsystems including a barrier internal space and an external space, and equivalent acoustic models of the two subsystems and a calculation method and recommendation parameters of the noise source sound power level are given respectively. According to the method, the sound environment of the high-rise building close to the urban road can be accurately predicted and calculated, and a basis is provided for noise pollution evaluation and control. And meanwhile, the method can be matched with a national standard method or commercial acoustic software for use, and has relatively high applicability.

The purpose of this invention is to propose an oxygen depressurization explosion-proof electrostatic vacuum noise silencing device, belonging to the field of safe handling of flammable and explosive industrial gases. The device includes a vertical cylindrical body, a bottom air inlet, a top exhaust outlet, supporting legs, and inside the cylinder, a bottom flame arrester, a multi-stage pressure reduction and deceleration assembly, an electrostatic elimination sound-absorbing layer, and a top flame arrester. Through multi-stage U-shaped microporous baffles, progressive pressure reduction and deceleration are achieved; the metal wire sound-absorbing layer eliminates static electricity and absorbs noise; and the upper and lower double-layer flame arresters block the backfire path, completely solving the problems of electrostatic explosion, backfire, and noise pollution during oxygen depressurization. This invention is suitable for high-risk scenarios such as liquid oxygen stations, ensuring the safe production of flammable and explosive chemical facilities, avoiding personal injury and property damage, while meeting environmental protection and noise reduction requirements.

The utility model relates to the technical field of wall surface cloth, in particular to curved surface acoustic wall surface sticking cloth. The patch comprises a patch body, two convex grooves are formed in the surface of the patch body, strip-shaped plates are connected to the surfaces of the convex grooves in a sliding mode, connecting blocks are fixedly connected to the surfaces of the strip-shaped plates, flannelette is fixedly connected to the surfaces of the two connecting blocks, and the flannelette is attached to the surface of the patch body. The surface of the flannelette is fixedly connected with a plurality of flannelette points, the height sizes of the flannelette points are different, the surface of the patch body is provided with a plurality of sound absorption grooves, and a plurality of refraction protrusions are arranged in the sound absorption grooves. The problems that when sound waves meet a flat patch body, the sound waves on the surface of the patch body are intensively reflected, so that indoor sound interferes with each other, echo is obvious, voice definition is reduced, noise pollution is aggravated, normal communication, learning and rest of people are seriously affected, and even hearing fatigue is possibly caused are solved.

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 present application relates to the technical field of coal mine machinery and equipment, and discloses a special extractor for coal mine cutting head pick, which comprises a connecting rod, a baffle is fixedly connected to the connecting rod, a buffer assembly is arranged on one side of the baffle, a flail is slidably sleeved in the middle of the connecting rod, a shovel type steel plate is fixedly connected to one end of the connecting rod away from the baffle, a protection assembly is arranged on one end of the connecting rod close to the shovel type steel plate, and a power assembly and a transmission assembly are arranged in the protection assembly; the buffer assembly is arranged, the cylindrical limiting structure of the protective sleeve and the sound insulation pad on the inner side are used, so that the flail is always limited in the protective sleeve during the sliding and impacting process, the hands of the operator are effectively prevented from being pinched, the sound insulation pad can greatly absorb the high-frequency metal noise generated when the flail impacts the baffle, the defects that the flail is completely exposed in the traditional extractor, the extrusion injury is easily caused, and the noise pollution is serious underground are made up for, and the safety and operation comfort of the extraction operation are significantly 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.