Radial Lip Crankshaft Seals for Heavy-Duty Diesel Engines

New double-lip and dual-lip crankshaft seals for heavy duty diesel engines have been developed. The very low radial-load, double-lip design, incorporating a helix pattern, has been adapted for high speed (30 m/s) application. In this development, we established that the seal speed limit was reached...

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Bibliographic Details
Published in:SAE transactions 1990-01, Vol.99 (3), p.761-769
Main Authors: Ohkawa, Satoshi, Iwakata, Keisaku, Tikugo, Kazuo
Format: Article
Language:English
Subjects:
Applied sciences
Bulldozers
Crankshafts
Diesel engines
Durability
Engines
Engines and turbines
Exact sciences and technology
Hydraulics
Internal combustion engines: gazoline engine, diesel engines, etc
Mechanical engineering. Machine design
Rubber
Silicone rubbers
Silicones
Torque
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Summary:New double-lip and dual-lip crankshaft seals for heavy duty diesel engines have been developed. The very low radial-load, double-lip design, incorporating a helix pattern, has been adapted for high speed (30 m/s) application. In this development, we established that the seal speed limit was reached when lip coking was generated due to breakdown of the oil. A bonded dual-lip seal, which can endure speeds above 20 m/s, has been developed by adopting a unique ventilating system to release the negative pressure between the two lips. From this development, a new seal design concept involving PV values has been established.
ISSN:0096-736X
2577-1531