4results about How to "Noise reduction effect" patented technology

The utility model discloses a sound insulation door, including door frame and door board, the door board with door frame rotatable connection, the door board is composite layer structure, from outside to inside is in proper order: panel, sound insulation heat preservation gasket, medium density fiberboard and fiber sound absorption board, the panel, sound insulation heat preservation gasket and medium density fiberboard symmetry setting in the both sides of fiber sound absorption board, the door board still includes multilayer damping glue for connecting each material layer. The utility model has beneficial effect in that, through setting up the door board as composite layer structure, has good sound insulation performance, light in weight, and conveniently opens and shuts.

This utility model relates to the field of laser scanning galvanometer technology, and in particular to a low-noise laser scanning galvanometer, comprising: a galvanometer body and a soundproof cover installed on the outside of the galvanometer body; the soundproof cover includes a main shell and a secondary shell, which are inserted into each other and fastened with bolts; wherein, sound-insulating cotton is installed on the inner surfaces of both the main shell and the secondary shell, and cooling structures are provided on both sides of the main shell. This utility model adopts a design of installing sound-insulating surfaces on the inner surfaces of both the main shell and the secondary shell to achieve sound insulation protection for the entire galvanometer body, thereby achieving a low-noise effect when the galvanometer body is working. At the same time, this application also installs a cooling structure on the outside of the main shell, so while reducing noise, it can also effectively ensure the heat dissipation stability of the internal galvanometer body during operation.

The utility model discloses a high-pressure automatic cleaning device. The high-pressure automatic cleaning device comprises an unpowered roller line, a high-pressure cleaning module, a lifting module and a 3D high-pressure cleaning module. And by arranging the unpowered roller line, direct contact between the IBC barrel and the ground is avoided according to the rolling friction principle, the carrying operation intensity is reduced, and the automation degree is high. By arranging the high-pressure cleaning module and arranging the sound insulation cotton on the periphery of the interior for wrapping, the significant noise reduction effect is achieved, people can leave by pressing down a start button, people do not need to get close to a sound source, and the safety performance is improved. By arranging the lifting module and the 3D high-pressure cleaning module, the lifting module drives the 3D high-pressure cleaning module to do lifting motion, the rotating sleeve can do rotating motion along the first rotating plane, the nozzle extension rod can do rotating motion along the second rotating plane, the three-dimensional all-dimensional (360-degree) cleaning function of the IBC barrel is finally achieved, the cleaning effect is good, and the cleaning efficiency is high.

This utility model discloses a hydraulic oil tank for a hydraulic oil pump. The tank body has cross-sections formed at a set of diagonal sides, one of which has an oil suction port and the other has an oil return port. The oil suction port's pipe extends into the tank body and connects to a coarse filter. The coarse filter is connected to a funnel-shaped expansion suction head via a threaded connector. The oil return port's outlet is connected to a fine filter, which is connected to a one-way throttle valve. The one-way throttle valve is connected to a flow-regulating pipe, which is curved and located within the tank body. This invention adds a funnel-shaped expansion suction head at the oil suction port to reduce suction resistance and minimize inlet disturbance. The addition of a flow-regulating pipe at the oil return port slows down the return oil flow. Combined with the 45° oblique cut, this effectively disperses the impact force of the oil and reduces disturbance. Furthermore, the diagonal distribution of the oil suction and return ports extends the oil flow path, promoting impurity sedimentation and air separation.