6results about How to "Achieve noise reduction effect" patented technology

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 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 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.