The invention discloses an internally-inserted water-cooled
magnet device for a high-field
hybrid magnet. The internally-inserted water-cooled
magnet device comprises a container
assembly and a
magnet coil assembly arranged in the container
assembly. The container assembly comprises an upper
barrel assembly, a container end cover, a hydraulic
machine assembly, a center
pipe assembly, an inner supporting assembly, a middle
barrel assembly, a lower
barrel assembly and an electric connecting assembly. The hydraulic
machine assembly comprises a cylinder body, a
piston, a check ring, a pressure equalizing pad, a first force transmission check ring, a first anti-rotation pin, a second force transmission check ring, a second anti-rotation pin, a first force transmission column and a second force transmission column. The
axial force application device has the advantages that
axial force application can be performed on the
magnet coil assembly, the pressing force on the
magnet coil assembly is improved, and the problems of tension fracture and damage caused by coil stress overrun due to overlarge radial expansion electromagnetic force of a magnet coil bit piece and an insulating piece are solved.