3results about How to "Reduce intake noise" patented technology

The utility model discloses a filter sound -absorbing structure is used to compressor air intake, including front cover, back cover, filter component, the front cover is fixedly connected with back cover and forms the internal cavity, be equipped with a plurality of baffle and sound -absorbing cotton in the internal cavity, the filter component is provided with air inlet and air outlet, the upper portion of front cover sets up the installation cavity, the installation cavity can dismantle and install filter component, the bottom of back cover sets up the air outlet, the length of baffle is less than the length of internal cavity, a plurality of baffles are mutually staggered arrangement, and the airflow channel is formed between mutually staggered arrangement baffle. The utility model integrates filter and sound -absorbing function in the same structure, replaces traditional discrete scheme, before compressor air intake, through the utility model can play the double -deck effect of filter and sound -absorbing, reduces equipment occupied space simultaneously, reduces installation layout difficulty, simplifies installation and maintenance process, and then reduces comprehensive cost.

The utility model discloses a small-sized pneumatic water-milling belt sander for polishing narrow parts, which comprises a shell, an inlet end of the shell is fixedly connected with an air inlet joint, an inlet end of the air inlet joint is communicated with an external air source, a silencer is fixedly connected between the outer side wall of the air inlet joint and the inner side wall of the shell, and the air inlet joint is communicated with the silencer. The outlet end of the air inlet connector is fixedly communicated with an air filter, an air flow adjusting valve is fixedly connected to the inner side wall of the shell, the inlet end of the air flow adjusting valve is communicated with the outlet end of the air filter, an opening and closing pin is slidably connected into the air flow adjusting valve, one end of the opening and closing pin extends out of the shell, and a trigger is hinged to the outer side wall of the shell and abuts against the opening and closing pin. A pneumatic motor is fixedly connected into the shell, and the inlet end of the pneumatic motor communicates with the outlet end of the air flow adjusting valve. According to the belt sander, a series of technical problems that a traditional belt sander is prone to vibration at a high rotating speed, noise is too large, and operation is unstable are effectively solved, and the polishing quality and the working efficiency are remarkably improved.

The application discloses a double-layer noise reduction air guide ring, which comprises an inner air guide ring layer and an outer air guide ring layer. The inner air guide ring layer comprises a circular ring segment, a mounting panel, an inlet flow guide segment and an outlet diffuser segment. The inlet flow guide segment and the outlet diffuser segment are fixedly connected with the two ends of the circular ring segment respectively. The inlet flow guide segment is in a circular arc shape. The mounting panel is fixedly connected with the side of the inlet flow guide segment, which is away from the circular ring segment. The outer air guide ring layer comprises a flat segment, a circular arc segment and a partition plate. The end of the circular arc segment, which is close to the inner air guide ring layer, is provided with an outer layer outlet end. The end of the circular arc segment, which is away from the inner air guide ring layer, is provided with an outer layer inlet end. The mounting panel and the flat segment are provided with a connecting structure. The partition plate is provided with a plurality of partition plates. The resonant cavities between the adjacent partition plates are different in size. The application further discloses a fan comprising the double-layer noise reduction air guide ring. The application has the advantages of high fan efficiency and low air inlet noise.