264 STANDARD LUBRICATING OIL SYSTEM FOR GEARED TURBINES. 



peres (minimum), 125 volts D. C. solenoid operated and arranged for main and 

 auxiliary circuit supply. 



One double-pole, single-throw knife switch, 30 amperes, 125 volts. 



One double-pole, double-throw knife switch, 30 amperes, 125 volts. 



Brass name plates shall be provided, labeled and mounted on panel as follows : 



"LOW OIL" between red signal light and gong. 



"GENERATOR" on main or generator connection to automatic throw-over 



switch. 



"BATTERY" on auxiliary or battery connection to automatic throw-over 



switch. 



"SUPPLY" between D. P. S. T. supply switch. 



"TANK NO. i" between one white signal light and corresponding throw-over 

 D. P. D. T. switch. 



"TANK NO. 2" between the other white signal light and corresponding throw- 

 over D. P. D. T. switch. 



5. Chief engineer's panel. — One chief engineer's panel, of black slate, on which 

 are mounted the following: One red light, two white light signals, one 4-inch gong, 

 and to be of the same specification as for main alarm panel. 



«0 



DISCUSSION. 



The President : — Paper No. 14, "Standard Lubricating Oil System for Geared Tur- 

 bines," is now open for discussion. 



Mr. W. W. Smith, Member: — Mr. President and gentlemen, this paper contains much 

 valuable information and should be of especial interest at the present time. During the 

 past two years the Federal Shipbuilding Company has built for the Emergency Fleet Cor- 

 poration thirty vessels. Eighteen of these were equipped with the pressure type of lubri- 

 cating oil system, and twelve with the standard type of oil system described in this paper. 

 The standard system that we installed, however, could hardly be called standard, because 

 of the very many changes which were made; in fact, I would say that these systems were 

 rather special because no two of the ships were alike. 



In general, there are two basic types of lubricating oil systems, the pressure and grav- 

 ity systems, and both of these systems are considered satisfactory, provided they are de- 

 signed properly, and properly installed. The following are some of the salient features 

 which are considered essential for satisfactory lubricating oiling systems :— First of all, the 

 system must be simple, and it is considered important to have the control of the pressure au- 

 tomatic, or the control of the system arranged so that it does not require a great deal of 

 attention from the operator. Secondly, there should be provided means which will prevent 

 the complete breakdown of the turbines in case the lubricating system should fail from any 

 cause. Thirdly, there should be an ample margin throughout in the entire design of 

 the svstem. 



