2results about How to "Reduce drive power" patented technology

The utility model relates to a kind of explosion-proof transfer flatcar, involving transfer car technical field, including frame, transfer track, automatic and manual driving device etc..Frame is composed of box girder, end beam etc., high structural strength, and fence is equipped to improve security.Transfer track is detachably installed in the top sink of frame.Automatic driving device contains driving wheel, explosion-proof driving motor etc., can stably drive frame to walk;Manual driving device contains driven wheel, speed reducer etc., when motor fails or needs to fine-tune position, it can be manually or driven by electric wrench.Driving motor and speed reducer output end are all equipped with clutch, can switch power source to make corresponding component be in free state.Frame both ends have parking device, containing fixed seat, telescopic cylinder and brake pad, can realize parking function.The utility model can meet the explosion-proof requirement of dangerous environment operation, with automatic walking, manual or electric wrench fine-tune position and other multiple functions, improve the flexibility and adaptability of use.

The application discloses a gradient coil of a nuclear magnetic resonance imaging system, which comprises an RF shielding layer, a primary winding layer surrounding the outside of the RF shielding layer, three target-axis primary windings, i.e., an X target-axis primary winding, a Y target-axis primary winding and a Z target-axis primary winding, each target-axis primary winding having multiple layers of primary coils, and the multiple layers of primary coils in the same target-axis primary winding being arranged in a radial direction of the gradient coil, a shielding winding layer surrounding the outside of the primary winding layer, three target-axis shielding windings, i.e., an X target-axis shielding winding, a Y target-axis shielding winding and a Z target-axis shielding winding, and a passive shimming layer arranged between the primary winding layer and the shielding winding layer. The application can simultaneously meet the requirements of miniaturization, light weight and small impedance value of a high-performance gradient coil.