Railroad car roller bearing adapter assembly
A railroad car bearing adapter assembly configured to be employed in combination with a high warp restraint truck (with or without an auxiliary or original warp restraint system), and including a low profile thickness and relatively longitudinally narrow roller bearing adapter, a low profile adapter shear pad with a shear stiffness in a range of 85,000 lbs/in to 125,000 lbs/inch, and side wear pad that in combination total clearance in a range of 0.09 inches to 0.36 inches between the side frame thrust lugs and the adapter with the side wear pads. This overall combination reduces wheel wear and damage, reduces fuel consumption, reduces the need for railroad track repair, improves high speed stability and curving performance for both empty cars and loaded cars, provides more truck stability under a loaded car in shallow curves and while encountering certain perturbations, and provides optimum curving performance that enables the axles to better align with curves of relatively high degrees.
1. A railroad car comprising:
a high warp restraint truck; and
a roller bearing adapter assembly including: (a) a roller bearing adapter, (b) an adapter shear pad having a longitudinal shear stiffness in a range of approximately 85,000 lbs/in and approximately 125,000 lbs/in, (c) a leading side wear pad, and (d) a trailing side wear pad,
the roller bearing adapter, the leading side wear pad, and the trailing side wear pad providing a side frame thrust lug to adapter total clearance in a range of 0.09 inches to 0.36 inches in a jaw of a side frame of the high warp restraint truck.
2. The railroad car of claim 1 , wherein the high warp restraint truck includes an auxiliary warp restraint system.
3. The railroad car of claim 1 , wherein the high warp restraint truck does not include an auxiliary warp restraint system.
4. The railroad car of claim 1 , wherein the high warp restraint truck includes constant contact side bearings.
5. The railroad car of claim 1 , wherein the high warp restraint truck does not include constant contact side bearings.
6. The railroad car of claim 1 , wherein the adapter shear pad includes an auxiliary stiffener.
7. The railroad car of claim 6 , wherein the auxiliary stiffener includes an auxiliary layer of elastic material.
8. The railroad car of claim 6 , wherein the auxiliary stiffener includes an auxiliary layer of elastic material and an auxiliary plate.
9. The railroad car of claim 6 , wherein the auxiliary stiffener includes an auxiliary plate.
10. The railroad car of claim 1 , wherein the adapter shear pad includes an upper plate, a lower plate, an elastomeric connector connecting the upper plate and the lower plate, and wherein the adapter shear pad has a relatively low profile thickness.
11. The railroad car of claim 1 , wherein the side wear pads are made from one of: a urethane, a glass filled urethane, a nylon, a filled nylon, one or more ceramics, a polyethylene, and a polyurethane.
12. The railroad car of claim 1 , wherein roller bearing adapter includes opposing pockets defined in a leading portion of the roller bearing adapter.
13. The railroad car of claim 12 , wherein the leading side wear pad includes opposing locking arms configured to be respectively received by the opposing pockets defined in the leading portion of the roller bearing adapter.
14. The railroad car of claim 1 , wherein the roller bearing adapter includes opposing pockets defined in a trailing portion of the roller bearing adapter.
15. The railroad car of claim 14 , wherein the trailing side wear pad includes opposing locking arms configured to be respectively received by the opposing pockets defined in the trailing portion of the roller bearing adapter.
16. A high warp restraint railroad truck bearing adapter assembly comprising:
a roller bearing adapter;
an adapter shear pad having a shear stiffness in a range of 85,000 lbs/in and 125,000 lbs/in;
a leading side wear pad; and
a trailing side wear pad,
wherein the roller bearing adapter, the leading side wear pad, and the trailing side wear pad have a side frame thrust lug to adapter total clearance in a range of 0.09 inches to 0.36 inches.
17. The high warp restraint railroad truck bearing adapter assembly of claim 16 , wherein the adapter shear pad has a relatively low profile thickness.
18. The high warp restraint railroad truck bearing adapter assembly of claim 16 , wherein the adapter shear pad includes an upper plate, a lower plate, and an elastomeric connector connecting the upper plate and the lower plate.
19. The high warp restraint railroad truck bearing adapter assembly of claim 16 , wherein the adapter shear pad includes a grounding strap connectable to the upper plate and connectable to the lower plate.
20. The high warp restraint railroad truck bearing adapter assembly of claim 16 , wherein the side wear pads are made from one of: a urethane, a glass filled urethane, a nylon, a filled nylon, one or more ceramics, a polyethylene, and a polyurethane.
21. The high warp restraint railroad truck bearing adapter assembly of claim 16 , wherein roller bearing adapter includes opposing pockets defined in a leading portion of the roller bearing adapter.
22. The high warp restraint railroad truck bearing adapter assembly of claim 21 , wherein the leading side wear pad includes opposing locking arms configured to be respectively received by the opposing pockets defined in the leading portion of the roller bearing adapter.
23. The high warp restraint railroad truck bearing adapter assembly of claim 16 , wherein the roller bearing adapter includes opposing pockets defined in a trailing portion of the roller bearing adapter.
24. The high warp restraint railroad truck bearing adapter assembly of claim 23 , wherein the trailing side wear pad includes opposing locking arms configured to be respectively received by the opposing pockets defined in the trailing portion of the roller bearing adapter.