POSITIVE DISPLACEMENT MACHINE PISTON WITH WAVY SURFACE FORM
摘要
A piston and cylinder assembly suitable for use in positive displacement machines (10) and capable of minimizing power losses resulting from friction and fluid leakage over a range of operating parameters. The piston (14) is reciprocably disposed within a cylinder (16) having a uniform diameter. The piston (14) has a bearing surface (30) that defines a diametrical clearance with the cylindrical bearing surface of the cylinder (16) of up to about two percent of the cylinder diameter. The diametrical clearance defines a lubrication gap (26) and a hydrodynamic seal between the piston (14) and the cylinder (16). The piston (14) further has alternating crests (34) and valleys (36) defined in a nominally cylindrical shape (28) of its bearing surface (30). The crests (34) and valleys (36) are oriented and spaced on the bearing surface (30) to define a wavy surface form (32) along the entire axial length of the bearing surface (30).
申请公布号
WO2010115010(A2)
申请公布日期
2010.10.07
申请号
WO2010US29647
申请日期
2010.04.01
申请人
PURDUE RESEARCH FOUNDATION;IVANTYSYNOVA, MONIKA MARIANNE;GARRETT, REECE ALAN;FREDRICKSON, ANDREW A.
发明人
IVANTYSYNOVA, MONIKA MARIANNE;GARRETT, REECE ALAN;FREDRICKSON, ANDREW A.