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

The application discloses a kind of acoustic submersible multi-stage linkage flexible suspension design method and acoustic submersible, it is related to marine observation and underwater acoustic technical field, comprising the following steps: planning the layout and relative position relationship of vector and scalar sensing unit in acoustic submersible system;For vector and scalar sensing unit, the elastic body connection architecture of multi-stage linkage flexible suspension system is designed, and the vertical and horizontal elastic body connection mode is planned respectively.The application sets up vertical and horizontal elastic body connection to vector channel and scalar channel respectively by multi-stage linkage flexible suspension architecture, and further suspends sensing unit frame in the internal frame of submersible main body, forms multi-stage vibration isolation system, can effectively absorb and attenuate the structural vibration energy transmitted by the swing of submersible main body caused by current impact, reduces structural noise from the source, significantly improves the purity and detection capability of acoustic signal acquisition.

The utility model discloses a kind of muffler air inlet pipe connecting frame, relate to agricultural machinery technical field.The muffler air inlet pipe connecting frame, including base, the base upper fixedly connected with engine, engine side surface fixedly installed with support frame, support frame is fixedly installed with shell, shell upper and lower sides are fixedly installed with air outlet pipe and air inlet pipe and with shell interior intercommunication, engine side surface is equipped with exhaust port, support frame lower side fixedly connected with pipe support, fixedly installed with rubber pad between pipe support and air inlet pipe;Support frame front end lower side fixedly installed with shock-absorbing rod.The muffler air inlet pipe connecting frame, the shock-absorbing spring of the muffler air inlet pipe connecting frame's connecting support frame installation can effectively attenuate low-frequency vibration generated when engine operates, through elastic deformation absorption vibration energy, reduce the vibration transmission caused by rigid connection, avoid the problem that weld point cracks, component loosening etc.

The utility model provides a riveting positioning device for battery support, including fixed plate, two mounting plates, two elastic support mechanisms and 4 adjustable positioning mechanisms, two mounting plates symmetry sets up in the left and right sides of fixed plate, two elastic support mechanisms symmetry sets up in the upper end surface of fixed plate, and elastic support mechanism is used for supporting the bottom or top end surface of battery support, 4 adjustable positioning mechanisms all set up in the upper end surface of fixed plate, 4 adjustable positioning mechanisms symmetry sets up between two elastic support mechanisms, and adjustable positioning mechanism can cooperate with the hole position of battery support, the utility model discloses a riveting positioning device for battery support has solved the problem that the key components such as positioning pin, fixed rod are caused due to the long -term use of riveting positioning device and lead to the mechanical wear and tear, and the precision deviation is easy to appear to exceed the tolerance limit value, and then leads to the problem of riveting hole position misplacement, battery pack installation failure.