Development of high temperature, high pressure rotating shaft seals: Final report
Rotating shaft seals used in coal gasification equipment are exposed to difficult environmental conditions including temperature from 430/sup 0/C to 816/sup 0/C (800/sup 0/F to 1500/sup 0/F), high pressure (to 10 MPa or 1500 psig), and high levels of particulate contamination (50,000 to 100,000 ppM). The program reported upon was designed to develop long-life seals that would not require external flushing or cooling. The approach taken was to develop unbalanced face that would remain closed and prevent particulate entry into the interface. Wear resistant materials and coatings with low friction coefficients are required. Significant results of the program are enumerated: The selected material combination was a rotating runner of Kentanium K162B mating against a non-rotating seal ring of Kentanium K162B. Kentanium is the trade name of a series of hard carbide alloys with pure titanium carbide as the principal ingredient. Nickel and nickel molybdenum are used as binder materials. Kentanium retains most of its strength at temperatures ..mu..p to 1100/sup 0/C (2000/sup 0/F). Since hard materials are required to resist wear and withstand the temperatures, mechanical compliance must be built into the seal configuration for the opposed faces to follow runner nutations and remain closed. Environmental and frictional heating caused the formation of very small particles of titanium oxide which lodged in the face wave formations and acted as an interfacial lubricant. The results of this program provide encouragement and optimism that dry contact face seals can be developed for long unattended operation in the hostile environment of a coal gasification plant. 40 refs., 98 figs., 20 tabs.
- Research Organization:
- Mechanical Technology, Inc., Latham, NY (USA)
- DOE Contract Number:
- AC21-85MC22074
- OSTI ID:
- 5469949
- Report Number(s):
- DOE/MC/22074-2533; ON: DE88001029
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
Similar Records
Erosion-resistant TiB/sub 2/ coatings formed by chemical vapor deposition
Chemical vapor deposition of erosion-resistant TiB/sub 2/ coatings
Related Subjects
COAL GASIFICATION PLANTS
SEALS
SHAFTS
MATERIALS
DESIGN
EQUIPMENT
FRICTION
LUBRICANTS
MOLYBDENUM
NICKEL
PROGRESS REPORT
ROTATION
TITANIUM CARBIDES
WEAR
WEAR RESISTANCE
CARBIDES
CARBON COMPOUNDS
DOCUMENT TYPES
ELEMENTS
INDUSTRIAL PLANTS
MACHINE PARTS
MECHANICAL PROPERTIES
METALS
MOTION
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
010404* - Coal
Lignite
& Peat- Gasification