Visualization of the Contact Condition and Lubricant Flow Between a Seal Ring and a Shaft for Automatic Transmissions NOK Corporation

Format:

Conference/Event

Author/Creator:

Nakaoka, S., author.

Conference Name:

SAE 2003 World Congress & Exhibition (2003-03-03 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2003

Summary:

Seal rings are used as shaft seals in automatic transmissions, where they act as a dam to direct pressurized fluid flow to hydraulic circuits. Conventionally, cast-iron seal rings were used, but over the past two decades, this material has been switched to resins like PTFE and PEEK to satisfy performance requirements such as low leakage and low frictional torque. However in using resin seal rings, the shaft sometimes undergoes the so-called three body abrasive wear due to invasion of hard particles, such as wear particles and dust, into the sliding portion between the seal ring and the shaft. To prevent such wear of the shaft, it is important to prevent invasion of hard particles into the sliding portion, and also to promptly discharge hard particles from the sliding portion. We therefore designed a seal ring taking into consideration these needs and investigated its shaft wear reduction effects. We built a test apparatus to observe the contact state of the seal ring face under hydraulic pressure using the LIF method, and clarified the effects of the contact state of the seal ring on shaft wear

Notes:

Vendor supplied data

Publisher Number:

2003-01-0472

Access Restriction:

Restricted for use by site license