86 CENTRIFUGAL, SEPARATION 



There are in use principally three systems of oiling, they 

 are the "splash-oiling system," the "sight-feed cup oiling 

 system" and the "open-hole oiling system." They vary in their 

 application with the different makes of separators. Obviously 

 that system is the best which is most nearly automatic, removes 

 the sediment without permitting it to recirculate, and econo- 

 mizes oil. 



In "the flash-oiling system" the gears and wearing parts are 

 partly submerged in the oil, the oil usually being splashed by the 

 lowest gear over the others and over the other wearing parts o{ 

 the separator. In some separators provisions are made in the 

 gear chamber for the draining of the grit and dirt, so that clean 

 oil, only, circulates over the wearing parts. Lamson 1 who made 

 an extensive study of the construction of separators recommends 

 that when this system is used, the gear chamber be frequently 

 drained, using the waste oil for coarser farm machinery and that 

 this chamber be flushed out with kerosene to remove sediment. 

 The "splash-oiling system" is completely automatic in its 

 operation. 



The "sight-feed cup oiling system" depends for its efficiency 

 in continuously oiling the friction parts, on being so adjusted as 

 to feed the oil slowly and on being kept filled. In its operation 

 care is required to keep the feed tubes open and free from clog- 

 ging, which is prone to occur in cold weather when the oil be- 

 comes abnormally viscous or congeals entirely. This oiling 

 system may be considered semi-automatic. 



The "open-oil-hole system' 1 is obviously the crudest form of 

 oiling the cream separator. It requires constant attention while 

 the separator is used. Its lubrication is not uniform, it wastes 

 oil, is mussy and the holes are prone to become clogged with 

 dirt, waste and other obstructions. 



Power Requirements of Cream Separators. The amount of 

 power required to drive a separator at the requisite speed obvi- 

 ously varies with the capacity of the machine. It also varies 

 with machines of the same capacity but of different makes, and 

 there is a considerable difference between the power required 



1 Lamson. A Study of Farm Separators. M. S. A. Thesis, Purdue Uni- 

 versity, 1918. 



