Development of Spacecraft Vuilleumier Cryogenic Refrigerators. Part II. Development and Fabrication.
Abstract
The design layout of the refrigerator was completed during this period. The detail design is 90% complete; fabrication is 30% complete. A significant effort was made to reduce the weight of the refrigerator while not impairing the reliability and high efficiency sought. Tests on life-limiting components were continued. Pertaining to the refrigerator electronics, the following has been established: the system for controlling the temperature of the hot cylinder was selected; the motor control circuitry is being fabricated; the signal conditioning circuitry was designed. Studies were conducted on gas and fluid retention in magnesium materials. A developmental model of the pressure difference regulator for the rolling seals was built; results were satisfactory. A suitable elastomeric material was selected for the oil-helium separator. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1972
- Accession Number
- AD0902944
Entities
People
- Gerald K. Pitcher