Lightweight high performance titanium sliding contact bearing
AssigneeThe Boeing Company
InventorsLawrence A. Blakely, Rodney R. Boyer, Lawrence B. Dalzell
Life of this patent
Estimating the term…
Abstract
A combination of a sliding-contact race (12) and bearing (10) in which a generally ring-shaped race member (12) and a generally ring-shaped bearing member (10) are fitted for relative sliding-rotation, the bearing member being within the race member. One of the members is comprised substantially of copper and the other of the members is comprised substantially of titanium. The members (10, 12) have lubricated contact surfaces (16, 18) for sliding-rotation, the member being comprised substantially of titanium having its lubricated contact surface being coated with chromium oxide (16).
Claims18
The combination of contacting sliding-rotation bearing members forming a bearing having the capability to receive high loads relative to the members' weight and having the capability to withstand high shock loads, without a permanently fixed lubricant between or in the members, comprising:
- a first bearing member containing a sufficient amount of Ti by weight to form a heavy duty bearing member;
- and
- a second bearing member containing a sufficient amount of Cu by weight to form a heavy duty bearing member;
- said first member having surface coated with plasma-sprayed Cr.sub.2 O.sub.3, the Cr.sub.2 O.sub.3 coating being bonded mechanically to the Ti;
- said Cr.sub.2 O.sub.3 coating being in sliding-rotation bearing contact with a surface of said Cu.
A combination of a sliding-rotation contact race and bearing for use as a landing gear trunnion bearing on large aircraft to receive high shock loads without a permanently fixed lubricant between or in the race and bearing, comprising:
- a generally ring-shaped race member;
- a generally ring-shaped bearing member fitted for relative sliding-rotation within said race member;
- one of said members being at least 80% by weight Cu and the other of said members being at least 70% by weight Ti;
- said members having lubricated contact surfaces for said sliding-rotation,
- the member being at least 70% Ti having its lubricated contact surface being plasma-spray coated with Cr.sub.2 O.sub.3, the Cr.sub.2 O.sub.3 being mechanically bonded to the Ti.
A sliding-rotation contact journal bearing and race having the capability to receive high loads relative to bearing and race weight and having the capability to withstand high shock loads, without a permanently fixed lubricant between or in the race or bearing, comprising:
- a ring-shaped bearing being at least 70% by weight Ti;
- said bearing having an outer circumferential bearing surface plasma-spray coated with Cr.sub.2 O.sub.3, the Cr.sub.2 O.sub.3 being mechanically bonded to the Ti;
- a generally ring-shaped race being at least 80% by weight Cu;
- said race having an inner generally circumferential surface complementary to the coated surface on said
- a second bearing member containing a sufficient amount of Cu by weight to form a heavy duty bearing member;
- said first member having surface coated with plasma-sprayed Cr.sub.2 O.sub.3, the Cr.sub.2 O.sub.3 coating being bonded mechanically to the Ti;
- said Cr.sub.2 O.sub.3 coating being in sliding-rotation bearing contact with a surface of said Cu.
Dependencies are inferred from the claim text.