Investigation of Silicone Polymer Fluids - Part 5, Performance as Hydraulic Fluids in Piston Pumps
Abstract
This report concerns progress of the investigation of this Laboratory on the use of "silicone" fluids or dimethylpolysiloxanes for non-inflammable hydraulic fluids. In NRL report No. P-2481 of March 1945 the performance in gear pumps was described. It is shown herein that the silicone fluids tested also may be used with success as hydraulic fluids in Vickers piston pumps provided certain types of bearing surfaces are altered. The requisite mechanical changes are simple and inexpensive. In NRL report No. P-2499 of April 1945 it was proved that the silicone fluid is a very unsatisfactory lubricant for loaded surfaces of steel sliding on steel, while for steel sliding on bronze surfaces it is a good lubricant. It is shown here that the same conclusions relative to steel sliding on steel or bronze are reached from Vickers piston pump tests. The failure to lubricate the piston pumps occurred at the universal link and knuckle bearings, the only lubricated parts where loaded surfaces of steel sliding on steel occurred. When bronze knuckles were substituted for steel, it was found that the pump was unreasonably good condition after more than 600 hours of operational 1500 pounds per square inch. The formation of gel was found to be considerable when steel on steel bearings were used, but appeared to be very much less when bronze to steel bearings were substituted.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1945
- Accession Number
- AD1191741
Entities
People
- Deets L Pickett
- Richard O Militz
- Vincent G. Fitzsimmons
Organizations
- United States Naval Research Laboratory