23results about How to "Achieve noise reduction effect" patented technology

The utility model discloses an electric hair cutter with vibration and noise reduction functions, which comprises a shell, a fixing plate is fixedly connected in the shell, an outer rotor motor is arranged at the lower end of the fixing plate, a screw is arranged in the fixing plate, a spring washer is arranged on the surface of the screw, a rubber pad is arranged at the upper end of the outer rotor motor, and a motor is arranged in the outer rotor motor. An eccentric shaft is arranged in the shell, a movable knife rest is arranged at the upper end of the eccentric shaft, a knife head body is arranged at the upper end of the movable knife rest, and an on-off key is arranged on the surface of the shell. Through the structure, the outer rotor motor is fixed on the main body through the spring gasket and the rubber pad, and the spring gasket has the characteristics of elasticity and softness of the rubber pad, so that vibration and noise generated by collision between the spring gasket and the rubber pad are effectively reduced, and the noise reduction effect is achieved.

The utility model discloses a noise-reduction wear-resistant steel ball, which relates to the technical field of wear-resistant steel balls, and comprises a steel ball body, a limiting groove is arranged on the surface of the steel ball body, a wear-resistant layer is fixedly connected in the limiting groove, an internal noise-reduction structure is fixedly connected in the steel ball body, and the wear-resistant layer is fixedly connected in the internal noise-reduction structure. The internal noise reduction structure comprises a filling cavity and a filling layer in the filling cavity. The effect of keeping the overall strength of the steel ball is achieved through the honeycomb-shaped filling cavities, in actual use, the compression strength loss of the steel ball is smaller than 5%, the steel ball body has good stability, the effect of absorbing vibration energy is achieved through the filling layer made of the composite damping material, and the service life of the steel ball is prolonged. And therefore, the steel ball body has a good noise reduction effect.

The utility model relates to the field of air conditioner noise treatment, in particular to a unit structure giving consideration to attractiveness and noise reduction, which comprises a supporting mechanism for mounting and supporting, and a water disc guard plate component and a coil pipe side guard plate component which are used for carrying out auxiliary noise reduction on a compressor, and a coil pipe component is mounted at the top of the inner side of the supporting mechanism. A water disc protection plate assembly is arranged between the bottom of the coil pipe assembly and the supporting mechanism, water inlet and outlet side protection plate assemblies are installed on the two sides of the lower end of the water disc protection plate assembly, and coil pipe side protection plate assemblies are installed on the front end face and the rear end face of the lower end of the water disc protection plate assembly. Noise of the compressor is gradually absorbed by the relatively closed sound-absorbing cotton in the transmission process and is gradually weakened after being reflected through the corrugated concave-convex parts of the sound-absorbing cotton, noise can be reduced, and the effects of attractiveness and noise reduction of the modular air-cooled chiller unit are achieved.

The utility model relates to the technical field of vehicles, in particular to a vehicle door assembly and a vehicle. The vehicle door assembly comprises a door metal plate, a mounting structure and a door lock suction actuator, the mounting structure is connected with the door metal plate and the door lock suction actuator in a clamped mode, and the mounting assembly comprises a clamping shaft and a mounting piece. Due to the fact that the clamping shaft is connected with the installation piece and the door metal plate in a clamped mode, the installation efficiency of the door lock suction actuator and the door metal plate can be improved, and the sealing skirt edge covers the periphery of the connecting hole of the door metal plate to play a sealing role. In addition, the limiting hole and the communicating hole are matched with each other so that noise of the door lock pull-in actuator can be transmitted into the through hole from the limiting hole, due to the fact that a transmission medium in the through hole is air which is attenuated in the air, the sealing skirt edge can further achieve the noise reduction effect, and the situation that the noise of the door lock pull-in actuator is transmitted into a vehicle through the clamping hole of the door metal plate is reduced.

The utility model relates to the technical field of air pump accessories, in particular to a heat dissipation suite and an air pump thereof.The heat dissipation suite comprises a heat dissipation sleeve, a containing cavity used for containing the air pump is formed in the heat dissipation sleeve, one end of the heat dissipation sleeve is of a closed structure, an opening is formed in the other end of the heat dissipation sleeve, and a heat dissipation air channel is formed in the inner wall of the heat dissipation sleeve; the heat dissipation air channel extends from the closed end of the heat dissipation sleeve to the open end of the heat dissipation sleeve. The contradiction between noise suppression and heat dissipation enhancement of small and medium-sized air pumps in the prior art is effectively solved.

The present invention relates to a coating composition for heat insulation and sound absorption and a coated steel sheet having excellent heat insulation and sound absorption characteristics using the same, and more particularly, to a coating composition for heat insulation and sound absorption, a coated steel sheet using the same, and a method for manufacturing the same, the coating composition for heat insulation and sound absorption comprising: a polyvinyl chloride resin; a plasticizer; foaming the capsule; the foaming capsule is a foaming capsule with a core-shell structure, and the foaming capsule is composed of a polymer shell and a foaming agent core.

The application relates to the technical field of water purification equipment, and particularly discloses a low-noise water purifier which comprises a booster pump with a water inlet and a water outlet, a water inlet pipe and a water outlet pipe, the water inlet pipe is communicated with the water inlet, the water outlet pipe is communicated with the water outlet, the water outlet pipe comprises a main flow channel and a noise reduction bypass branch flow channel communicated with the main flow channel, the noise reduction bypass branch flow channel comprises at least two water passing openings, the water passing openings guide part of water in the main flow channel to enter and exit the noise reduction bypass branch flow channel so as to buffer the water flow in the main flow channel. The high-pressure pulsating water flow in the water outlet pipe can be branched to the noise reduction bypass branch flow channel for buffering, and then flows back to the main flow channel to be combined with the water flow in the main flow channel, the normal water outlet amount in the water outlet pipe is guaranteed, the high-pressure pulsating water flow in the water outlet pipe is buffered and decelerated, the water flow is stabilized, the noise reduction purpose is achieved.

This invention discloses a non-destructive testing method based on a multidimensional complementary ensemble empirical mode decomposition (MEMD) algorithm. The method constructs a three-dimensional matrix of all thermal image data and transforms it into a two-dimensional matrix. MEMD is then performed on each row of the two-dimensional matrix, and the decomposed images are further processed column-wise. The resulting images are then combined using the MEMD algorithm to extract the defective image portion, yielding the clearest image. This invention utilizes both the temporal and spatial information of the thermal image sequence through row and column mode decomposition, comprehensively reflecting defect information. Furthermore, this invention has broad applicability, suitable for any thermal image sequence, including both long-pulse heating and eddy current pulse heating.

The utility model discloses a host computer's host computer improved structure, including host computer shell, be provided with motor and deceleration transmission subassembly in host computer shell, and the host computer shell periphery has opened host computer air inlet and host computer air outlet, and the motor has opened motor air inlet and motor air outlet, its characterized is, still including motor cover, and the motor cover includes air inlet chamber, air outlet chamber and sound attenuation chamber, and the air outlet chamber is located one side of air inlet chamber and the sound attenuation chamber is located the top of air inlet chamber and air outlet chamber, and the air inlet chamber is wrapped motor periphery and the motor air inlet is located the lower part of air inlet chamber, and the lower part opening of air inlet chamber is connected with host computer air inlet, and the upper part of air inlet chamber is connected with the upper part of air outlet chamber and the motor air outlet is located the upper part of air inlet chamber, and the lower part opening periphery of air outlet chamber is in contact with the inner wall of host computer shell, and the lower part opening of air outlet chamber is connected with host computer air outlet, this kind of food processing machine, add motor cover, shorten the exhaust path of motor, can also play certain sound insulation and sound attenuation effect simultaneously.

The utility model relates to the technical field of building engineering, and disclose a housing construction stair step antiskid noise reduction device, including the bottom plate, the inside bottom end fixedly connected with the sound absorption layer of bottom plate, and the top end surface fixedly connected with the buffer layer of sound absorption layer, and the top end surface fixedly connected with the isolation layer of buffer layer, the top end surface fixedly connected with the water absorption layer of isolation layer, and the top end surface fixedly connected with the air permeable layer of water absorption layer. The utility model under the action of buffer layer, can to the user's tread impact force carry out certain buffer unloading, thereby reducing the impact force that stair bears, under the action of sound absorption layer simultaneously, can good absorption after tread friction sound and impact sound, and the material of sound absorption layer also has certain buffer unloading effect, this design under the cooperation of sound absorption layer and buffer layer can to the tread impact force of user's foot part produce buffer unloading, can effectively absorb the sound produced simultaneously, thereby reach the effect of noise reduction.

The application discloses a complete iron accessory of a power distribution transformer substation, relates to the technical field of iron accessory installation, and comprises a limiting rod, clamping seats are symmetrically and slidingly installed outside the limiting rod, a rail seat is installed at the outer curved bottom of the clamping seat, a stand column is installed at the top of the rail seat, a supporting rod is slidingly installed by being embedded into the bottom end of the stand column, a pressing plate and a guide block are respectively installed at the two ends of the supporting rod, and a rail rod is embeddedly installed at the end of the rail seat corresponding to the position of the guide block. The application can realize triple utilization of self gravity, non-Newtonian fluid gravity and cable gravity, can convert and absorb external wind disturbance, collision and beating force and ground vibration force suffered by erected rod frames, effectively combines the reliability of hard support and the flexibility of flexible limiting, realizes displacement compensation of the internal structure of the iron accessory and relative sliding between the erected rod frames, can effectively absorb vibration interference, avoids loosening and sliding of the iron accessory, indirectly realizes noise reduction, and improves the compatibility of the iron accessory.

The utility model relates to a fan device and vertical face cleaning equipment. The fan device comprises a shell, a driving mechanism, an impeller assembly and a turbulent flow part. A containing cavity and a spiral air duct arranged around the periphery of the containing cavity are formed in the shell, and the spiral air duct is constructed to be communicated with the air inlet side and the air outlet side of the fan device; the driving mechanism is arranged in the accommodating cavity; the impeller assembly is in transmission connection with the driving mechanism, and the impeller assembly is driven by the driving mechanism to rotate, so that external airflow flows from the air inlet side to the air outlet side through the spiral air duct; the turbulent flow part is arranged in the spiral air channel and disturbs airflow flowing through the spiral air channel. By arranging the spiral air duct, the airflow exhaust path is greatly prolonged, and the turbulent flow part is arranged in the spiral air duct, so that airflow in the spiral air duct can be disturbed, sound wave energy is partially consumed before reaching the outlet, and the noise reduction effect can be achieved.

The utility model provides an exhaust tail throat, a noise elimination structure and a vehicle, and belongs to the technical field of vehicle exhaust systems.The exhaust tail throat is provided with a color changing ring, when the temperature of a tail throat body rises to a high-temperature state, the color changing ring is changed into striking red or orange from light color, high-temperature warning is achieved, and scalding caused by mistaken touch is effectively prevented; the containing cavity is formed in the tail throat body, the exposed notch is formed in the rear end of the containing cavity, the color-changing ring is embedded in the tail throat body, the stable display function of the color-changing ring is ensured, the effect of protecting the color-changing ring is achieved, stability and durability are improved, the color change of the color-changing ring is compared with the metal texture of the tail throat body, and the color-changing effect of the color-changing ring is improved. The exhaust tail throat is endowed with science and technology sense and layering sense, and the appearance coordination of the whole automobile is improved. By arranging the elastic pushing piece, continuous backward elastic pushing force is formed on the color-changing ring, so that the color-changing ring tightly abuts against the cavity rear wall all the time, and it is ensured that the position of the color-changing ring is stable.

The application provides a compressor top cover and a compressor. The compressor top cover is used for a compressor and comprises a mounting end face facing a static scroll. The mounting end face is provided with a first exhaust cavity, a second exhaust cavity and a flow-through port. The first exhaust cavity and the second exhaust cavity are arranged at intervals. Part of gas can enter the second exhaust cavity which is in communication with the first exhaust cavity, so that a certain buffering and noise reduction effect is achieved. The compressor top cover is further provided with an exhaust passage. The exhaust passage is in communication with the second exhaust cavity and extends through the compressor top cover to form an exhaust port. The gas flows out of the exhaust port after being buffered by the second exhaust cavity. The compressor top cover is further provided with an oil return port which is in communication with the first exhaust cavity and the second exhaust cavity. Along the direction of gravity, the exhaust port, the flow-through port and the oil return port are arranged in sequence. When the gas enters the second exhaust cavity from the first exhaust cavity, the cooling oil can flow from the oil return port to the second exhaust cavity along with the gas flow, so that further collection of the cooling oil is realized.

The utility model discloses a refrigerating system and refrigerating equipment, and relates to the technical field of refrigerating equipment, the refrigerating system comprises a compressor, a condenser, a capillary tube and an evaporator, the compressor, the condenser, the capillary tube and the evaporator are communicated in sequence; the refrigerating system further comprises a gas-liquid separator, the capillary tube comprises a first branch tube and a second branch tube, the first branch tube is communicated with an outlet of the condenser and an inlet of the gas-liquid separator, and the second branch tube is communicated with a liquid outlet of the gas-liquid separator and a first inlet of the evaporator. The evaporator is further provided with a second inlet, and a gas outlet of the gas-liquid separator is communicated with the second inlet. According to the refrigerating system and the refrigerating equipment, noise can be reduced.

The utility model relates to the technical field of hedge trimmers, in particular to a hedge trimmer with a noise reduction function, a movable knife rest is slidably mounted on a shell, a pull rod is rotatably connected with the movable knife rest, a gear set is mounted between a brushless motor and a transmission disc, a rubber sleeve is fixedly mounted on the movable knife rest, and the rubber sleeve is fixedly connected with the pull rod. A movable knife rest is installed on the shell, a movable blade is installed on the movable knife rest, a top cover is installed on the movable knife rest, rubber pads are fixedly installed on the movable knife rest and the top cover, and an attraction pad is fixedly installed on the inner side wall of the shell; the suction pad installed on the inner side wall of the shell can further absorb noise generated by operation, in the process that the movable knife rest drives the movable blade to slide, the rubber sleeve and the rubber pad between the movable knife rest and the movable blade can absorb vibration generated during sliding, collision generated in the cutting process of the movable knife rest and the movable blade is avoided, the damping effect is achieved, and the service life of the movable knife rest is prolonged. And the effect of reducing noise is achieved.

This utility model discloses a noise reduction structure for an adjustment body of an automotive steering gear, including a steering housing, an adjustment housing, and a steering rack. The adjustment housing houses the noise reduction structure, which includes an adjustment plug, a rack support, a spring, a friction assembly, a sidewall anti-collision assembly, and a compression anti-collision assembly. A connecting groove is formed in the right end of the rack support, and the friction assembly is installed in the connecting groove. The sidewall anti-collision assembly is installed between the rack support and the adjustment housing, and the compression anti-collision assembly is installed between the adjustment plug and the rack support. The steering rack is movably embedded in the steering housing, with its sidewall in contact with the inner wall of the friction assembly. This utility model relates to the field of automotive steering gear technology. Through the coordinated operation of the friction assembly, the sidewall anti-collision assembly, and the compression anti-collision assembly, it effectively buffers and suppresses abnormal noise from steering rack friction, lateral impacts between the rack support and the housing, and axial compression collisions between the adjustment plug and the rack support, achieving a comprehensive noise reduction effect.

The utility model relates to the field of silencers, and discloses a fan inlet silencer convenient to install, which comprises a silencer main body, the right side of the silencer main body is fixedly connected with a connecting pipe, the top end and the bottom end of the connecting pipe are provided with reinforcing plates, the reinforcing plates are movably hinged with installing plates, and the installing plates are fixedly connected with the silencer main body. A sound insulation layer is fixedly connected into the silencer body, a noise reduction sleeve is installed on the inner side of the sound insulation layer, and a first sound insulation sleeve is installed on the inner side of the noise reduction sleeve. According to the fan inlet silencer convenient to install, the noise reduction strength is improved through the multi-layer noise reduction and sound insulation structure, in the using process, the noise sensor can monitor noise in real time, once the noise exceeds the value, the terminal alarm module can give an alarm remotely, workers are reminded to replace and maintain the structure in the silencer body, and the noise reduction effect is improved. During maintenance and disassembly, the dustproof plate needs to be taken down firstly, then the sound insulation layer, the noise reduction sleeve, the first sound insulation sleeve and the second sound insulation sleeve can be pulled outwards one by one, and the problem that disassembly and replacement are inconvenient is solved.

The utility model discloses a kind of pipeline blocking clamp driving elements of hemodialysis machine, including electromagnet, electromagnet push rod, upper silica gel pad, lower silica gel pad, fixed plate and clamping plate, the fixed plate is distributed along the axial direction of electromagnet push rod with clamping plate, and is fixedly connected with electromagnet push rod, the upper silica gel pad, lower silica gel pad are all installed between fixed plate and clamping plate.The blocking clamp of the utility model is radial expansion when doing blocking action, the gap between it and electromagnet push rod is filled completely after upper silica gel pad is pressed, buffer layer is formed, impact energy is effectively absorbed under the premise of maintaining blocking stroke and blocking effect unchanged, the effect of noise reduction is achieved;Meanwhile, after blocking ends, electromagnet push rod moves downward, lower silica gel pad contacts outer cover, and noise reduction is realized.

The utility model discloses a pipeline pump noise reduction structure which comprises an installation bottom plate, a pipeline pump body is fixedly installed at the upper end of the installation bottom plate, a pump body noise reduction cavity is fixedly installed at the outer end of the lower end of the pipeline pump body, and the interior of the pump body noise reduction cavity is partially filled with a sound absorption material layer. Reinforcing ribs and sound insulation protrusions are fixedly installed on the inner wall of the pump body noise reduction cavity, a supporting table is fixedly installed at the upper end of the pipeline pump body, a fixing cover is fixedly installed at the upper side end of the supporting table, a swing cover is rotationally connected to the upper end of the fixing cover through a damping shaft, and air holes are formed in the two sides of the swing cover. A fixing frame is fixedly installed at the outer end of the air hole, and the upper end of the fixing frame is rotationally connected with a sound insulation cover used for shielding the air hole through a damping shaft. The two sides of the lower end of the pipeline pump body fixedly communicate with a pump body inlet pipe and a pump body outlet pipe correspondingly. The noise reduction device achieves the effect of comprehensively reducing noise on the upper portion and the lower portion of the pipeline pump body.

The utility model provides a draught fan, cleaning equipment and a cleaning system. The draught fan comprises a machine body and a rectification net. The machine body comprises an air inlet; the rectifying net comprises a mesh part and a mounting part surrounding the mesh part, the mounting part is connected to the edge of the air inlet, and the mesh part is located on an air inlet path of the fan; the mesh part comprises the through holes which are evenly distributed, the density of the through holes is configured to meet the specified density range, and the technical problem that an existing draught fan is large in noise can be solved.

The utility model provides a kind of metallized polypropylene film capacitor noise reduction device, it is related to capacitor technical field, comprising: capacitor, the one side of capacitor is equipped with two power lines, the upper and lower positions of capacitor are respectively installed one noise reduction board, the outside position of noise reduction board is installed one first cache sponge, the outside position of first cache sponge is installed one protective inner shell, protective inner shell has two, the outside position of protective inner shell is respectively installed one first protective outer shell, one second protective outer shell.Noise reduction board inside face is established honeycomb structure noise reduction groove, can make incoming sound wave constantly reflect and refract, effectively consume sound wave energy, first cache sponge and second cache sponge and noise reduction board mutually cooperate, further enhance the sound insulation effect, so that noise reduction board can more effectively absorb noise, solve the problem that capacitor generates noise and influences surrounding environment.

The utility model discloses cooling equipment technical field discloses a sound absorption device and cooling equipment, and this sound absorption device includes mounting piece and sound absorption piece, the mounting piece is equipped with air inlet, sound absorption piece is connected with mounting piece, and sound absorption piece is opposite to the setting of air inlet, and the sound absorption piece covers air inlet in the direction of axial orthographic projection of air inlet, and the gap of at least one side of sound absorption piece and mounting piece forms air inlet channel, and air inlet channel is communicated with air inlet. The sound absorption device can carry out sound absorption treatment to the noise that the cooling tower air inlet place transmits, reaches the effect of noise reduction, and the sound absorption device will not form the block to the wind that the external environment comes, and the wind required when the cooling tower runs can enter from the air inlet channel of side portion, and enters the cooling tower through air inlet, to satisfy the need of wind force when the cooling tower runs.