This study was carried out to know what is the best material and surface treatment in reciprocating compressor, such as connecting rod material, connecting rod coating, crank shaft surface coating and lubricant oil viscosity. In this study, test was performed to evaluate the difference of fricti...
This study was carried out to know what is the best material and surface treatment in reciprocating compressor, such as connecting rod material, connecting rod coating, crank shaft surface coating and lubricant oil viscosity. In this study, test was performed to evaluate the difference of friction coefficient and wear when replace sintered connecting rod to aluminum alloy connecting rod, Bearing load which is similar as compressor running mechanism was applied to the parts and lubricant oil was supplied at the parts for testing to know the effect of oil viscosity. This is not dry friction test. At the friction test of connecting rod and crank shaft, the friction coefficient was improved 6 ~ 16% when replace sintered connecting rod to aluminum alloy connecting rod, also, there is no friction coefficient difference between coated connecting rod and bared connecting rod. At the friction test of connecting rod and piston pin, the friction coefficient was improved 3 ~ 16% when replace sintered connecting rod to aluminum alloy connecting rod, also, there is no friction coefficient difference between coated connecting rod and bared connecting rod, too. From the oil viscosity, when we changed oil viscosity from 8cSt to 5cSt with connecting rod and crank shaft, the improvement of friction coefficient is 13∼25 % with sintered connecting rod, 9∼11 % with aluminum alloy connecting rod. With connecting rod and piston pin, the improvement of friction coefficient is 9∼11 % at sintered and aluminum alloy connecting rod. The conclusion is that, when we use aluminum alloy to reciprocating compressor, we can improve compressor efficiency because the friction coefficient of aluminum alloy is lower than sintered. also aluminum alloy has similar level of anti-wear comparing with sintered connecting rod.
This study was carried out to know what is the best material and surface treatment in reciprocating compressor, such as connecting rod material, connecting rod coating, crank shaft surface coating and lubricant oil viscosity. In this study, test was performed to evaluate the difference of friction coefficient and wear when replace sintered connecting rod to aluminum alloy connecting rod, Bearing load which is similar as compressor running mechanism was applied to the parts and lubricant oil was supplied at the parts for testing to know the effect of oil viscosity. This is not dry friction test. At the friction test of connecting rod and crank shaft, the friction coefficient was improved 6 ~ 16% when replace sintered connecting rod to aluminum alloy connecting rod, also, there is no friction coefficient difference between coated connecting rod and bared connecting rod. At the friction test of connecting rod and piston pin, the friction coefficient was improved 3 ~ 16% when replace sintered connecting rod to aluminum alloy connecting rod, also, there is no friction coefficient difference between coated connecting rod and bared connecting rod, too. From the oil viscosity, when we changed oil viscosity from 8cSt to 5cSt with connecting rod and crank shaft, the improvement of friction coefficient is 13∼25 % with sintered connecting rod, 9∼11 % with aluminum alloy connecting rod. With connecting rod and piston pin, the improvement of friction coefficient is 9∼11 % at sintered and aluminum alloy connecting rod. The conclusion is that, when we use aluminum alloy to reciprocating compressor, we can improve compressor efficiency because the friction coefficient of aluminum alloy is lower than sintered. also aluminum alloy has similar level of anti-wear comparing with sintered connecting rod.
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