The internal lubrication principle of piston pumps

This post was last edited by lth on 2010-5-3 18:28. It is similar to the lubrication method used in reciprocating compressors. Use an oil pump to pump oil for forced lubrication! ! Another function of the crankcase is to serve as an oil tank; the lubrication of the crosshead is generally achieved by oil entering through the oil holes in the crosshead slideways. The lubrication of the crankshaft bearings generally takes place as lubricating oil enters through the oil holes in the crankshaft journals. The primary method of lubrication for the moving parts of piston pumps is pressure-driven lubrication. Its advantages include an adequate supply of oil, thorough lubrication, and the ability to effectively remove heat from the friction surfaces as well as metal debris; hence it is widely used. In microcomputers and some minicomputers, splash lubrication is also often used, without an oil pump.

This post was last edited by wo*aohe on 2010-5-5 17:55. The oil pump pumps oil into the crankshaft bearings; there are oil holes in the crankshaft, and the oil enters the big-end bearings through these holes. There are also oil holes in the connecting rods that are connected to the big-end bearings, and the oil reaches the small-end bearings via these rods. Finally, the oil exits the small-end bearings and returns to the crankcase, where it goes back to the oil pump. The flow is: oil pump---crankshaft bearing---crankshaft oil hole----big-end bearing----connecting rod----small-end bearing----crankcase----oil pump