Hydrodynamic bearing structure for bearing cooling fan and method for assembling the same

A hydrodynamic bearing structure for bearing a cooling fan, comprising:

• a housing having a cylindrical accommodating space, wherein an upper opening communicating with the accommodating space is provided at an upper end of the housing;
• a bottom plate, disposed on a bottom of the housing, wherein the bottom plate is tightly fit to the bottom of the housing;
• a hydrodynamic bearing, disposed in the accommodating space, wherein a rotation shaft hole extending through a top surface and a bottom surface of the hydrodynamic bearing is provided in the center of the hydrodynamic bearing;
• a rotation shaft, disposed in the rotation shaft hole of the hydrodynamic bearing, wherein an upper end of the rotation shaft protrudes from the top surface of the hydrodynamic bearing, and a bottom end of the rotation shaft protrudes from the bottom surface of the hydrodynamic bearing and contacts a top surface of the bottom plate;
• and
• a thrust member, fixedly connected to the bottom end of the rotation shaft and accommodated between the bottom surface of the hydrodynamic bearing and the bottom plate, wherein
• a space in the accommodating space between the bottom surface of the hydrodynamic bearing and the top surface of the bottom plate is filled with a lubricating oil.