79results about How to "To achieve the effect of noise reduction" patented technology

The invention discloses a centrifugal fan impeller capable of adjusting splitting vanes, and aims at solving the problems that the common working conditions of a current fan product in use do not match with the rated working conditions, thus the service efficiency of a fan is low, and the efficient operation range of the fan is reduced. The centrifugal fan impeller capable of adjusting the splitting vanes is characterized in that a circular guide ring and a wheel disc form a revolving pair; a main fixing frame which is provided with a circular guide ring fixing device is fixed to the wheel disc; the circular guide ring is connected to n upper fixing devices for the circular ring and the splitting vanes; the splitting vanes are connected to a wheel cover through upper fixing devices for the wheel cover and the splitting vanes, and the splitting vanes are connected with the wheel disc through upper fixing devices for the wheel disc and the splitting vanes; each upper fixing device for the circular ring and the splitting vanes is connected to the corresponding upper fixing device for the wheel disc and the splitting vanes through a splitting vane adjusting part. According to the centrifugal fan impeller, the circular guide ring can be rotated to drive the splitting vane adjusting parts to swing so as to adjust the angles of the splitting vanes, thus the maximum operation efficiency can be obtained according to different working conditions, and the maximum operation efficiency which can be achieved only under the rated working conditions can be obtained by a centrifugal fan under the off-rating conditions.

The invention relates to a press key which comprises a base plate, a circuit layer, a key cap and a balance rod. The base plate is provided with a clamping hook portion and a first through hole, and the clamping hook portion is adjacent to the first through hole. The circuit layer is provided with a first sublayer and a second sublayer. The first sublayer is arranged on the base plate and is provided with a second through hole. The second sublayer is arranged on the first sublayer, is provided with a third through hole and extends to the position at the upper portion of the second through hole, the portion, extending to the position at the upper portion of the second through hole, of the second sublayer is defined as a first buffering block, the first buffering block is provided with four sides, two sides of the first buffering block are connected with the second sublayer, and the first buffering block is adjacent to the clamping hook portion. The key cap is arranged above the base plate and can vertically move with respect to the base plate. The balance rod is provided with a first rod portion and a second rod portion. The first rod portion is connected with key cap, and the second rod portion penetrates through the clamping hook portion. By the adoption of the press key, the effect of reducing volume produced during pressing so as to achieve noise reduction can be achieved.

The invention discloses a wind guide ring structure, an air conditioner outdoor unit and an air conditioner. The wind guide ring structure comprises a wind guide ring which is internally provided witha wind passing channel. A protruding structure is arranged on the inner wall of the wind passing channel, and a plurality of noise reducing holes are formed in the outer portion of the protruding structure at intervals. The wind guide ring structure can reduce air amount loss, and effective work of blades is higher.

The invention discloses a highway bridge collision prevention device, the device can greatly improve the shock absorption effect of the bridge when the bridge is impacted, The invention adopts the double-layer cushioning damping assembly, when the vehicle strikes the bridge, the cushioning assembly can gradually realize the cushioning and effectively protect the bridge and the vehicle, the cushioning stroke distance of the invention is large, the cushioning is mild, and the sound absorption damping assembly is also arranged, so as to realize the noise-removing effect of the highway noise.

The invention discloses a noise eliminating device for reducing the exhaust noise of an internal combustion engine. The noise eliminating device comprises a shell, wherein the shell comprises an innershell and an outer shell, a cavity is formed between the inner shell and the outer shell, an air inlet pipe is arranged on the left side of the shell, the air inlet pipe extends into the inner cavityof the shell, a first baffle is arranged in the inner cavity of the shell, a buffer groove is formed in the middle of the left side of the first baffle plate, the buffer groove and the air inlet pipeare located on the same horizontal plane, and noise eliminating pipes are arranged on the periphery of the buffer groove. Through the arrangement of the buffer groove, the airflow can play a role inbuffering when coming out of the air inlet pipe, and the air flow can circularly flow on the left side of the first baffle to reduce the noise; sound absorbing cotton is arranged on the inner surfaceof the buffer groove, so that when the air flow is transmitted to the buffer groove, the effect of absorbing noise is achieved; the noise eliminating pipes are arranged, so that air flow is transmitted to the right side of the first baffle from the left side of the first baffle; and first noise eliminating holes are formed, so that the energy of the air flow in the noise eliminating pipes is prevented from being attenuated, and the effect of noise eliminating is achieved.

The invention discloses a mute heat exchange primary air system. The mute heat exchange primary air system comprises a first processing module and a second processing module, wherein the first processing module comprises an air inlet pipe, the air inlet pipe is connected with a heat exchanger, the heat exchanger is connected with a heat supply main pipe, the heat exchanger is connected with a first air outlet pipe, the first air outlet pipe is connected with a purifier in the second processing module, the air outlet of the purifier is connected with the second air outlet pipe, the air subjected to two-stage treatment is discharged by the second air outlet pipe, a first fan is arranged in the first air outlet pipe, a second fan is arranged in the second air outlet pipe, at least one denoiser is arranged at a position, close to the air outlet, of the second air outlet pipe, and a filter screen is arranged at the air outlet of the second air outlet pipe. The primary air system disclosed by the invention has the advantages that the heat exchanger is arranged on a heat supply main pipeline, heat exchange is carried out without increasing energy consumption, a multi-stage filter screen is arranged in the primary air system, particulate matters in the air are subjected to filtration and sterilization treatment, and air purification quality is improved.

The invention provides an exhaust silencing structure and a compressor. The exhaust silencing structure comprises an air cylinder seat and a first silencing pipe, the air cylinder seat is provided with an exhaust channel and a first silencing cavity, the first silencing pipe is arranged in the first silencing cavity, a first inlet, a first outlet and a plurality of first silencing holes are formedin the side wall of the first silencing pipe, a first cavity is formed in the space between the first silencing pipe and the inner wall of the first silencing cavity, each first silencing hole is communicated with the first cavity, and the exhaust channel is communicated with the first inlet. Through the exhaust silencing structure, refrigerant airflow enters the cavity of the first silencing pipe through the exhaust channel, part of sound wave of exhaust pulsation noise in the first silencing pipe penetrates through the first silencing holes and then enters the first cavity after penetratingthrough the first silencing holes, and after the sound wave enters the first cavity, part of the sound wave and airflow in the first cavity can generate air column resonance, part of sound energy isconverted into heat energy to be consumed, another part of sound wave is reflected back into the cavity to be counteracted with incident sound wave, and the effects of noise reduction and sound attenuation are achieved.

The invention discloses a touch structure, a touch display panel, a touch display device and a touch driving method. The touch structure comprises touch scanning electrodes, touch induction electrodes, difference operation units and inverse phase units. Each touch induction electrode comprises a first induction sub-electrode and a second induction sub-electrode, wherein either the first induction sub-electrode or the second induction sub-electrode is connected to a first input terminal of the corresponding difference operation unit, the other induction sub-electrode is connected to a second input terminal of the corresponding difference operation unit through the corresponding inverse phase unit. According to the technical scheme, in the difference operation process, noise signals in the first induction sub-electrodes and noise signals in the second induction sub-electrodes are cancelled out, and useful signals in the first induction sub-electrodes and useful signals in the second induction sub-electrodes are superposed to obtain touch induction signals, so the denoising effect is achieved while the useful signals are reserved.

The invention discloses a movable type low-noise diesel generating set device. The movable type low-noise diesel generating set device comprises a diesel generating set, a noise reduction compartment and a movable vehicle carrying device, wherein the noise reduction compartment is a closed space, the diesel generating set is arranged inside the noise reduction compartment, the noise reduction compartment is arranged on the movable vehicle carrying device, and the movable vehicle carrying device is used for carrying the noise reduction compartment to move. The diesel generating set comprises a diesel engine, an electric generator, an elastic connecting disc, a rubber shock absorber and a bottom frame, wherein the diesel engine is fixedly connected with the electric generator through the elastic connecting disc, both the diesel engine and the electric generator are arranged on the bottom frame, and the rubber shock absorber is fixed between the bottom frame and the diesel engine and between the bottom frame and the electric generator. According to the movable type low-noise diesel generating set device, vibration noise of the generating set and exhaust noise of the diesel engine can be effectively lowered.

Noise-reducing air energy heat pump water heater, including shell, heat pump circulation system including compressor, fin heat exchanger, four-way reversing valve, DC fan, condenser and connecting compressor, fin heat exchanger, four-way reversing Piping for valves, DC fans and condensers. The DC fans are set on the top of the heat pump circulation system and installed horizontally. The DC fans include four and are evenly distributed on the top of the heat pump circulation system. The fin heat exchangers are arranged on both sides of the shell. , the compressor is fixed on the upper bottom plate by bolts; the noise of the water heater is reduced by setting an AC fan, and the effect of noise reduction is achieved. Further, a sound insulation cover is provided around the compressor, and the noise generated by the compressor is isolated by the sound insulation cover. In addition, the effect of noise reduction is achieved.

The invention discloses an open-air distribution box protection device. The device comprises a machine shell. A machine body is arranged in the machine shell. The right side of the machine body is provided with a placement cavity for accommodating a distribution box. The outer surface of the right end of the machine shell is provided with a ventilation hole communicating with the outside and the containing cavity. A temperature sensor capable of sensing the temperature of the distribution box is fixedly arranged on the outer surface of the distribution box. The temperature sensor senses the temperature change of the outer surface of the distribution box. A starting or closing signal is transmitted to the motor. The spring is arranged in the machine body. A first water tank is arranged below the motor. According to the open-air distribution box protection device, protection of the power distribution box which is arranged in the open air can be achieved. Meanwhile, damping of the power distribution box which vibrates due to work is achieved through the buffering effect of the third connecting rod and the sliding rail, and therefore the noise reduction effect is achieved.

The invention discloses a quartz sand crushing device with a shock absorption function. The quartz sand crushing device comprises a crusher and a shock absorption device, wherein the shock absorptiondevice is arranged on an outer bottom plate of the crusher, the shock absorption device comprises a supporting frame and a moving column, the moving column is movably inserted on an upper plate of thesupporting frame, a supporting rod is fixedly arranged at the upper end of the moving column, and the lower end of the moving column is movably inserted on a cylinder bottom plate of a sealing cylinder. According to the quartz sand crushing device, the shock absorption device is additionally arranged below the crusher, so that the shock absorption effect is achieved through the shock absorption device when the crusher works, and the effect of protecting the device can be achieved by reducing vibration. Meanwhile, the effect of noise reduction can be achieved by reducing mechanical vibration while shock absorption is achieved.

The invention discloses sand producing equipment and process for materials of various specifications. The sand producing equipment comprises a raw material conveyor line, a raw material crusher, a semi-finished product conveyor line, a semi-finished product screening machine, a powder removal system and a finished product output line, wherein a conveying start end of the raw material conveyor lineis provided with a raw material bin; the raw material crusher comprises a raw material inlet which is jointed with a conveying tail end of the raw material conveyor line, and a semi-finished productoutlet for discharging a crushed semi-finished product; a conveying start end of the semi-finished product conveyor line is jointed with the semi-finished product outlet; the semi-finished product screening machine comprises a screening inlet jointed with the conveying tail end of the semi-finished product conveyor line, and a screening outlet for discharging screened semi-finished products according to the specifications; the powder removal system comprises a plurality of dust removal lines which separately correspond to the raw material conveyor line, the raw material crusher, the semi-finished product conveyor line and the semi-finished product screening machine; the screening outlet comprises a finished product outlet and a returned crushed material outlet; a conveying start end of thefinished product output line is jointed with a finished product outlet; and the returned crushed material outlet is jointed with a raw material inlet of the raw material crusher. The sand producing equipment of the structure can be suitable for producing materials of various specifications, and can achieve relatively high production standards.

The invention discloses an intelligent noise reduction cabinet for a server, which comprises a cabinet body, a noise reduction mechanism, a mounting mechanism and a heat dissipation mechanism, and ischaracterized in that the mounting mechanism is arranged on the side wall of the cabinet body, the cabinet body is connected with the noise reduction mechanism through the mounting mechanism, and theheat dissipation mechanism is arranged on the inner wall, away from the mounting mechanism, of the cabinet body; the noise reduction mechanism comprises a frame body, a limiting groove and a noise reduction unit; wherein the frame body is of a box body structure with an opening in one side, a limiting groove is formed in the inner wall of the frame body, mounting holes matched with the noise reduction units are formed in the outer wall, away from the opening, of the frame body, the mounting holes are distributed in a honeycomb shape, the sections of the multiple sets of noise reduction units are hexagonal, and each noise reduction unit is of a cylinder structure with an opening in one end. The side wall, away from the noise reduction unit, of the frame body is attached to the outer wall ofthe cabinet body, and a sealing washer is arranged on the side wall, away from the noise reduction unit, of the frame body. The noise reduction mechanism and the heat dissipation mechanism cooperatewith each other, and the working efficiency of the noise reduction mechanism and the heat dissipation mechanism is improved.

The invention provides a PP-R cold-hot water supply pipe comprising a pipe body composed of a PP-R inner layer and a PP-R outer layer. A heat preservation layer and a reinforcing layer are sequentially arranged between the PP-R inner layer and the PP-R outer layer from inside to outside, and the inner side of the PP-R inner layer is coated with an antibacterial layer. The reinforcing layer is composed of an inner net layer, an outer net layer and arc-shaped supporting frames arranged between the inner net layer and the outer net layer in the axis direction. The arc-shaped supporting frames areoppositely arranged at intervals, and the arc-shaped tops and the arc-shaped feet make contact with the net layers on the opposite side and are fixed to the net layers on the opposite side correspondingly. The reinforcing layer is vacuum-treated or filled with a sound-insulating medium. The PP-R cold-hot water supply pipe has good mechanical strength and heat preservation and anti-frost performance.

The invention discloses a gear type rubber pipe clamp. The gear type rubber pipe clamp comprises an upper pipe clamp, a lower pipe clamp and a hoop. The upper pipe clamp comprises an upper pipe clampshell and upper pipe clamp filling rubber with which the upper pipe clamp shell is filled. The lower pipe clamp comprises a lower pipe clamp shell and lower pipe clamp filling rubber with which the lower pipe clamp shell is filled. A containing cavity for containing a pipeline is formed inside after the upper pipe clamp shell and the lower pipe clamp shell are connected. Multiple gear type vibration isolation grooves are formed in each of the inner walls, used for containing the pipeline, of the upper pipe clamp shell and the lower pipe clamp shell. The upper pipe clamp shell and the lower pipe clamp shell are fixedly connected with a target base after the upper pipe clamp shell and the lower pipe clamp shell are locked by the hoop. According to the gear type rubber pipe clamp, noise can be reduced while the pipe clamp is fixed and subjected to vibration isolation.

The invention discloses a fresh air purifier with a noise reducing function. The fresh air purifier comprises a shell; the internal of the shell is an air way; a fan is arranged in the air way; an opening end of the air way is an exhaust port; at least one noise reducer is arranged between the exhaust port and the fan; the noise reducers are arranged at the bottom of a filter screen; and the filter screen is arranged in the exhaust port. At least one noise reducer is arranged in the air way; the noise reducers are placed behind the fan which serves as a noise source; in a position from the back end of the fan by 3-10 cm, the front surfaces of the noise reducers are signal microphones; the signal microphones are towards the noise source for collecting and analyzing the phase and the vibration amplitude of the noise; the reverse surfaces of the noise reducers are HIFI horns; the HIFI horns emit sound waves with opposite phases and identical vibration amplitudes with wind noise; the placing directions of the noise reducers are parallel to the exhaust direction; and reverse sound waves generated by the noise reducers are neutralized with forward sound waves generated by self rotation of the fan to finally reduce the sound to achieve the noise lowering effect.

The invention discloses a polishing device convenient to replace for machining. The polishing device comprises a fixing frame and a motor. The motor is fixedly connected to the inner top wall of the fixing frame through a tripod, and the lower end of the vertical section of the fixing frame is rotationally connected with multiple rotating rods. When a first moving rod enters a first through hole,a locking rod is disengaged from an L-shaped moving rod and enters a lock groove to be fixed. After a second moving rod enters a fixing groove, a third moving rod enters a fourth through hole, the polishing device is fixed, a screw enters a screw hole and is screwed, the polishing device is fixed again, and detaching can be completed only by pulling out the locking rod and the fixing frame in sequence. When polishing stone starts to work, produced mechanical vibration is reduced through a first rubber plate and a second rubber plate, and therefore the noise reduction effect is achieved. Accordingly, the device not only can achieve the effect that replacement is convenient and fast, but also can achieve the noise reduction effect.

A fan frame capable of reducing noise comprises an outer frame body surrounding an inner space, a shaft tube base located in the inner space, a plurality of static blades extending from the outer wallface of the shaft tube base to the outer frame body, and a plurality of partition plates. Each partition plate is connected with at least one of the static blades and the inner wall face of the outerframe body. The internal space is provided with an air inlet and an air outlet. Each static blade is arranged on the shaft tube seat along the flowing direction far away from the bottom of the shafttube seat. Each partition plate is matched with the outer frame body to define a partition space communicating with the inner space; due to the design of the separation space, the effect of noise reduction can be achieved, a cavity does not need to be formed by increasing the size of the outer frame body, and therefore, the outer frame body can be designed to be light and thin, the windward area can be reduced, and noise at the air inlet and the air outlet can be restrained at the same time.

The invention discloses a wind-pressure-resistant door for coastal areas, and relates to the technical field of doors and windows. The door comprises a door body; a door lock is arranged in the middleof one side of the door body; a connecting plate and a wind pressure plate are arranged in the door body; a rubber strip is fixedly connected with the outer edge between the connecting plate and thewind pressure plate; a spring is arranged between the connecting plate and the wind pressure plate; a connecting groove is formed in the side, close to the wind pressure plate, of the connecting plate; a sliding block is slidably connected with the interior of the connecting groove; and a damping block is fixedly connected with the end, away from the connecting groove, of the sliding block. According to the wind-pressure-resistant door for the coastal areas, through the arrangement of a sponge block, vibration generated when a sealing layer makes contact with a door frame can be absorbed, so that the effect of reducing noise is achieved, and meanwhile when wind blows to the rubber strip, the vibration can be absorbed through the sponge block, so that the effect of further reducing noise isachieved; and the force borne by the sealing layer can be further adsorbed through the arrangement of an elastic piece, so that the noise reduction effect is further enhanced.

The invention relates to a noise reduction device for a front shaft forge piece feeding workshop section of an intermediate frequency heating furnace, and aims to solve the problem of large noise caused by collision vibration when an existing intermediate frequency heating furnace is fed. The noise reduction device comprises a transmission channel, a workbench and a noise reduction unit, wherein the transmission channel is arranged on the workbench, the noise reduction unit is arranged on the workbench and arranged above the transmission channel, the noise reduction unit comprises a noise reduction plate and supporting columns, the noise reduction plate are connected with the supporting columns through first elastic telescopic rods, and a first movable plate is fixedly arranged at the rearend of the noise reduction plate. By increasing the noise reduction device on an auxiliary feeding device, when a forge piece body is fed, the impact of the forge piece body on the supporting columnscan be reduced through the arrangement of the noise reduction device, in this way, not only can the effect of noise reduction be achieved by reducing mechanical vibration, but also the impact force of the forge piece body on the supporting columns can be reduced, the supporting columns can be protected, and the service life of equipment is prolonged.

The invention relates to a noise reduction device based on artificial intelligence, which comprises a cabinet frame and a bottom plate, the cabinet frame is fixedly installed on the top surface of the bottom plate, glass is fixedly installed on the two sides and the rear surface of the interior of the cabinet frame, first sound absorption cotton is fixedly installed in the middle of the inner surface of the glass, and a cabinet door is arranged on the front surface of the cabinet frame; first sound-absorbing cotton is fixedly mounted in the middle of the inner surface of the cabinet door, a door lock is arranged on one side of the first sound-absorbing cotton, the door lock is embedded in the cabinet door, the cabinet door is rotatably mounted on the front surface of the cabinet frame through hinges, and a service robot body is placed at the bottom end in the cabinet frame and fixedly mounted on the top surface of the bottom plate. The artificial intelligence service robot is fixedly installed in the cabinet frame with the double-layer glass on the four sides, sound absorption and noise reduction are conducted through the double-layer glass, the sound absorption cotton installed on the inner surface and the sound absorption coating coated on the surface of the top end and the surface of the bottom end, and the noise is prevented from being transmitted out to affect other personnel.