36results about How to "Reduce oil resistance" patented technology

The invention relates to a body cooling structure for a transformer or an electric reactor. The body cooling structure for the transformer or the electric reactor is characterized in that oil flow openings are formed in positions near the upper end and the lower end of a center column paper barrel, and the center column paper barrel is supported by an insulating cushion block of a lower iron yokecushion block; a plurality of iron yoke oil passages are arranged in an iron yoke; a plurality of axial oil passages are arranged in each wire cake of a coil, and the axial oil passages in the adjacent wire cakes are radially staggered from one another; a plurality of oil flow openings are formed in an upper-end insulator and a lower-end insulator; the iron yoke oil passages axially correspond tothe axial oil passages of the coil and the oil flow openings of the upper-end insulator and the lower-end insulator; oil flow openings are formed in the upper end and the lower end of a multilayer paper barrel. The body cooling structure for the transformer or the electric reactor has the advantages that the center column, body and coil cooling capacity can be improved; the body cooling structureis high in reliability, cooling capacity and low in cost and is simple, processes for the body cooling structure are simple, and a single column can be possibly used as single phase for the transformer or the electric reactor with extra-high capacity.

The invention relates to the technical field of compressors and particularly relates to a pump body of a rotary cylinder piston compressor and a compressor adopting the pump body. The pump body of the rotary cylinder piston compressor comprises a rotary shaft, a piston and an air cylinder, wherein the rotary shaft is internally provided with a rotary shaft hole; the air cylinder is internally provided with an oil-conducting channel communicated with the rotary shaft hole; and the crossed area of the rotary shaft hole and the oil-conducting channel is no smaller than 20% of the cross section area of the rotary shaft hole. Meanwhile, the invention further provides the compressor adopting the pump body of the rotary cylinder piston compressor. By enlarging the crossed area of the rotary shaft hole and the oil-conducting channel, the oil pumping amount of the rotary shaft can be increased; a sinking groove, an air cylinder oil hole and an air cylinder short shaft hole are arranged so that the oil discharging resistance of an oil hole in the side face of the rotary shaft is reduced and the oil outlet quantity of the oil hole of the rotary shaft is increased; and the problem of abnormal abrasion caused by the fact that the lubrication between the side face of the rotary shaft and the piston is not enough under a heavy working condition is effectively solved.