Hybrid sliding ceramic main spindle device

The invention belongs to the technical field of machine assembly, and discloses a dynamic-static-pressure sliding ceramic main spindle device. According to the device, a central spindle entirely contains the non-sliding-friction surface of thrust ceramic spindle sleeves, and a second thrust fluid cavity plays the role of a back-thrust bearing; and a front radial-thrust ceramic bearing and a rear radial-thrust ceramic bearing both realize that central spindles and bearing bushes entirely contain bearing shells and spindle sleeves. Meanwhile, the dynamic-static-pressure sliding ceramic main spindle device also avoids the shape mutation of ceramic parts in the design, and further optimizes a liquid supplying path by structural design on this basis. Finally, according to the dynamic-static-pressure sliding ceramic main spindle device, the ceramic main spindle device is capable of protecting and supporting the thrust bearings, improving the impact resistance of the thrust bearings, preventing the breakage and frac