How to achieve lubrication for the compressor crosshead
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In this lubrication method, the compressor lubricant flows from the shaft end pump to the crankshaft; grooves are used to deliver the lubricant to the crankshaft. In another approach, the compressor lubricant first goes from the shaft end pump to the crosshead, and then to the crosshead pins and other components. How is the transfer of lubricant from the shaft end pump to the crosshead achieved? Is the lubricant supplied continuously?
Look closely at the connecting rod! First is the oil pump--oil pipe--crosshead slide--small bearing and crosshead pin--rod--large bearing ； Second is the crankshaft–connecting rod main bearing–connecting rod–crosshead pin and small bearing
Thank you. Could you explain in more detail? After the lubricant enters the compressor, how does it get to the crosshead and then to the small bearings?
Thank you. Could you explain in more detail? After the lubricant enters the compressor, how does it get to the crosshead and then to the small bearings?
There are two lubrication methods available for horizontal reciprocating machines on the market: forward and reverse. On the positive side, the oil is pumped out through the oil station and divided into two paths: one path is used for lubricating the crankshaft, which has holes through which the oil reaches the big end of the connecting rod; the other path is used for lubricating the crosshead, with the oil reaching the small end of the connecting rod via the crosshead. Reverse lubrication also consists of two circuits: one for crankshaft lubrication, and the other for the crosshead and the large and small ends of the connecting rods. For forward lubrication, holes must be drilled in the crankshaft; for reverse lubrication, holes must be drilled in the connecting rod
Page 201 of the \"Technical Manual for Piston Compressors\" states that there are two common circulation methods for the oil supply in systems using circulating lubrication: (1) The common route for medium-sized compressors: oil pump → crankshaft bore → big end of the connecting rod → small end of the connecting rod → crosshead slide → return to the oil tank； (2) Common path for large compressors: oil pump → crankshaft central hole → big end of connecting rod → small end of connecting rod → crosshead slide → back to oil tank ； Oil pump → Main engine bearing → Back to fuel tank ；
The oil passes through the coarse filter installed at the bottom of the crankcase, is drawn in and pressurized by the rotor oil pump, then filtered by the fine filter. The lubricating oil is kept at a constant pressure by the oil pressure control valve, after which it reaches the crankshaft, connecting rods, piston pins, and crossheads, reaching all the lubrication points. Lubricate the big end bearing of the connecting rod, the small end bushing of the connecting rod, and the crosshead guide rails