Structure for ensuring thermal stabilization of high-speed and precise electric mainshaft bearing based on porous metal

The invention discloses a structure for ensuring the thermal stabilization of a high-speed and precise electric mainshaft bearing based on porous metal. Front and back sleeve air inlets arranged at the side face of the sleeve of the an original high-speed and precise electric mainshaft are respectively communicated with annular grooves arranged at the side face of a porous metal bearing seat, andfront and back sleeve air outlets are arranged at the side face of the sleeve between the inner end face of the porous metal bearing seat and the two sides of a stator. An air source is divided into two paths after passing through a filter and a pressure valve, wherein one path of air is communicated with the front end back sleeve air outlets after passing through the front and back sleeve air inlets, the two annular grooves of the porous metal bearing seat and an axial through hole of the porous metal bearing seat, and the other path of air is communicated with the front sleeve air outlet after passing through the fr