发明名称 |
POSITIVE DISPLACEMENT MACHINE PISTON WITH WAVY SURFACE FORM |
摘要 |
<p>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).</p> |
申请公布号 |
KR20120016076(A) |
申请公布日期 |
2012.02.22 |
申请号 |
KR20117025694 |
申请日期 |
2010.04.01 |
申请人 |
PURDUE RESEARCH FOUNDATION |
发明人 |
IVANTYSYNOVA MONIKA MARIANNE;GARRETT REECE ALAN;FREDRICKSON ANDREW A. |
分类号 |
F16J1/02;F16J1/00;F16J1/08;F16J10/04 |
主分类号 |
F16J1/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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