INVESTIGATION OF LOW PRESSURE VENTS USED IN JOURNAL ROLLER BEARINGS (DOCKET NO. RB-6)

The following conclusions on the performance of low pressure release vents in use on freight car roller bearings are: the size and location of passageways and ports leading to the vents are not sufficient to prevent plugging with grease; synthetic elastomeric vent elements are susceptible to hardening and permanent deformation; the method of locking the vent in the backing ring does not allow easy maintenance or replacement of the vent element; the vent element may dislodge under operating conditions which impaires performance; when the vent is ineffective for relieving pressure, the grease and pressure are relieved through the seal, which could cause seal displacement and damage; and excess grease in the roller bearing causes bearing temperatures and pressures to increase.

• Corporate Authors:

  Association of American Railroads Research Center

  3140 South Federal Street
  Chicago, IL  United States  60616
• Publication Date: 1965

Media Info

• Pagination: 2 p.

Subject/Index Terms

• TRT Terms: Bearings; Freight cars; Journal boxes; Lubrication; Machine valves; Pressure; Railroad cars; Technology
• Geographic Terms: United States
• Old TRIS Terms: Pressure control valves
• Subject Areas: Maintenance and Preservation; Railroads;

Filing Info

• Accession Number: 00039430
• Record Type: Publication
• Report/Paper Numbers: MR-442 Tech Rpt
• Files: TRIS
• Created Date: Jul 8 1994 12:00AM