4results about How to "Reduce noise generation" patented technology

The application provides an electric cylinder motor with a coaxial magnetic gear. The electric cylinder motor with the coaxial magnetic gear comprises a cylinder, a shaft core, a driving part, two inner magnetic poles, two magnetic adjusting poles and two outer magnetic poles. The cylinder is rotatably installed outside the shaft core. The driving part is fixedly installed outside the shaft core and inside the cylinder. The two inner magnetic poles are fixedly installed outside the driving part. The two magnetic adjusting poles are fixedly connected to the shaft core and the driving part and the inner magnetic poles are located inside the two magnetic adjusting poles. The two outer magnetic poles are fixedly installed inside the cylinder and outside the magnetic adjusting poles. The electric cylinder motor with the coaxial magnetic gear adopts the coaxial magnetic gear transmission. The power transmission is realized through the magnetic field coupling between the inner magnetic poles, the magnetic adjusting poles and the outer magnetic poles. The friction and impact during the meshing of the traditional mechanical gear are avoided. The noise generation is fundamentally reduced. The overall service life of the electric cylinder motor is significantly prolonged.

This utility model relates to the field of noise reduction devices, and more particularly to a noise reduction device for the engine room of a new energy ship. The noise reduction shell has an internal installation chamber for installing battery packs. A cover is installed on the upper part of the noise reduction shell, and thin inserts are vertically installed at the bottom of the cover. The thin inserts are inserted into the gaps between each battery pack. Symmetrical limiting grooves are formed on both sides of the bottom of the thin inserts, and the bottom wall of the limiting grooves is fixedly connected to an arc-shaped rubber strip. The other end of the arc-shaped rubber strip is in contact with a rubber rebound block. In this utility model, the sound-absorbing structure in the inner layer of the noise reduction shell and cover effectively absorbs the noise generated by the internal components. Furthermore, multiple sets of thin inserts are provided at the bottom of the cover to fill the installation gaps between the battery packs, and a rubber buffer structure reduces possible displacement and collision between the battery packs, thereby effectively reducing noise generation and improving the noise reduction effect of the engine room.

This invention relates to a method for operating a vehicle seat valve, wherein the piston of the vehicle seat valve moves from a closed position to an open position or vice versa by applying voltage to a drive mechanism, particularly an electromagnetic drive mechanism. The power of the drive mechanism is adjusted via an effective voltage that can be varied by pulse width modulation of a pulse voltage having a constant frequency. To move the piston from its closed position toward its open position, the duty cycle of the pulse width modulation is first increased from a resting duty cycle, particularly 0%, to an initial duty cycle of less than 100%, particularly less than 50%, and then increased to a final duty cycle, particularly to 100%, after the piston reaches the open position and / or upon detection of an obstruction preventing the piston from moving before reaching its open position.

This invention discloses an underwater vehicle release device, comprising: a base with a first through hole in the middle, the first through hole accommodating a cable; a hollow sleeve with openings at both ends, the bottom surface of which is connected to the top surface of the base; a heating component and a shape memory alloy column in the hollow cavity of the sleeve, and a mounting hole in the side wall, with a mounting element in the mounting hole; a release component sleeved on the outside of the sleeve, with an opening in the middle; a protective cover fixed to the top surface of the release component, with an elastic element inside; a limiting pin with a second through hole vertically in the middle; one end of the elastic element abutting against the protective cover, and the other end abutting against the limiting pin; a heating component fixed to the top surface of the base and connected to the cable; one end of the shape memory alloy column connected to the heating component, and the other end inserted into the second through hole, with an annular step in the middle locking the limiting pin; the annular step shrinks to a size smaller than the second through hole after being heated, causing the limiting pin to move down until the mounting element disengages from the mounting hole, thereby reducing noise during release and avoiding electromagnetic interference.