Hydraulic System Seal Development.
Abstract
Modern ARmy Helicopters utilize single- or two-stage hydraulic actuator rod seals that must be capable of operating over the temperature range of -65F to +275F. These actuators are usually exposed to a high concentration of dust during takeoff and/or landing maneuvers and during very low level hover maneuvers. The rotor control actuators are subjected to a large number of small amplitude feedback cycles caused by the load imposed by each rotor blade. Helicopter actuators exposed to the environment described have not provided the desired reliability, maintainability, or safety. The objective of this program was to investigate and develop new and improved multiple cascaded seal configurations for hydraulic systems and actuators, thereby favorably impacting hydraulic system reliability, maintainability, safety, and cost by significantly reducing seal system leakage. The program clearly demonstrated the superiority of the multiple cascaded seal over the single-stage seal and provided data that can be used as a guideline for selection of the optimum number of seals in a given installation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1981
- Accession Number
- ADA103201
Entities
People
- Keith E. Whitfill
Organizations
- Vought