Oil-lubricated vertical turbocharger heat insulation structure

The invention relates to an oil-lubricated vertical turbocharger heat insulation structure which comprises a backflow cover, a sealing plug, a flow guide disc, an oil return pool and a heat insulation plate. A heat insulation plate is arranged on the inner side of the bottom of the backflow cover, an oil return pool is placed on the heat insulation plate, the outer side above the oil return pool is fixed through a flow guide disc, and the inner side above the oil return pool is sealed through a sealing plug. The oil return pool is of a thin-wall annular groove structure, an annular boss is arranged on the outer side of the oil return pool, and an annular boss is arranged on the inner side of the oil return pool. Compared with a traditional turbocharger adopting an external heat insulation structure, the vertical turbocharger has the advantages that the occupied space is large, the vertical turbocharger has enough space for arranging a sealing structure at the vortex end, and the vertical turbocharger has the