DEVELOPMENT OF HIGH LOADING RATE TESTING MACHINE
Abstract
Efforts were concerned with design, installation, and test of new components calculated to improve maximum rate performance of the machine. The first design change which was instituted was the replacement of the heads of the loading cylinder with new heads which provided more generous internal flow passages, and larger cylinder port connections. Next an effort was made to obtain a faster valve action, and a greter flow rate through the loading valve. The original valve installed was of the pilot piston type, and it was felt that a direct acting valve might minimize the delay time. A direct acting valve, with an impact type actuator was obtained, and was of a size to provide the maximum port area possible with the use of the machine operating pressures. Performance with this valve was very slow (100 milliseconds) and it was obvious that a pilot type valve, with full size ports, would be required. There are presently two factors contributing to the limitation of machine operating speed. The first of these is the presence of gas bubbles in the operating fluid. The second obstacle is the necessity for obtaining a higher volumetric flow rate through the loading valve operation. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 31, 1961
- Accession Number
- AD0259295
Entities
People
- Robert E. Sebring