Roller bearing apparatuses including compliant rolling elements, and related methods of manufacture
View Patent ↗In an embodiment, a roller bearing apparatus may include a rotor having first superhard raceway elements distributed circumferentially about an axis. Each first superhard raceway element includes a raceway surface positioned/configured to form a first portion of a raceway. The apparatus includes a stator including second superhard raceway elements generally opposed to the first superhard raceway elements. Each second superhard raceway element includes a raceway surface positioned/configured to form a second portion of the raceway. The apparatus includes rolling elements interposed between the rotor and stator and positioned and configured to roll on the raceway. One or more of the rolling elements may be configured to elastically deform on the raceway during use. At least a portion of the raceway exhibits a first modulus of elasticity greater than a second modulus of elasticity of at least a portion of the one or more of the rolling elements.
1. A roller bearing apparatus, comprising:
a rotor including:
a first plurality of superhard raceway elements distributed circumferentially about an axis, each of the first plurality of superhard raceway elements including a raceway surface positioned and configured to form a first portion of a raceway;
a first support ring that carries the first plurality of superhard raceway elements;
a stator including:
a second plurality of superhard raceway elements generally opposed the first plurality of superhard raceway elements, each of the second plurality of superhard raceway elements including a raceway surface positioned and configured to form a second portion of the raceway;
a second support ring that carries the second plurality of superhard raceway element; and
a plurality of rolling elements interposed between the rotor and the stator and positioned and configured to roll on the first race and second race, at least a portion of the raceway exhibiting a first modulus of elasticity greater than a second modulus of elasticity of at least a portion of the plurality of rolling elements, the first modulus of elasticity being about three (3) times greater to about fifty (50) times greater than the second modulus of elasticity.
2. The roller bearing apparatus of claim 1 , wherein one or more of the plurality of rolling elements are further configured to exhibit non-linear elastic deformation during use.
3. The roller bearing apparatus of claim 1 , wherein the first modulus of elasticity is about thirty (30) times greater to about forty five (45) times greater than the second modulus of elasticity.
4. The roller bearing apparatus of claim 1 , wherein the first modulus of elasticity is about four (4) times greater to about fourteen (14) times greater than the second modulus of elasticity.
5. The roller bearing apparatus of claim 1 , wherein one or more of the plurality of rolling elements comprise one or more superelastic materials.
6. The roller bearing apparatus of claim 5 , wherein the one or more superelastic materials comprise a nickel-titanium alloy.
7. The roller bearing apparatus of claim 1 , wherein the raceway is substantially planar, substantially cylindrical, or substantially conical.
8. The roller bearing apparatus of claim 1 , wherein one or more of the first or second plurality of superhard raceway elements comprise a concavely-curved raceway surface or a convexly-curved raceway surface.
9. The roller bearing apparatus of claim 1 , wherein one or more of the first or second plurality of superhard raceway elements comprise a substrate and a polycrystalline diamond table bonded to a substrate.
10. The roller bearing apparatus of claim 1 , wherein the rotor, stator, and plurality of rolling elements form a radial roller bearing assembly, a thrust roller bearing assembly, or a tapered roller bearing assembly.
11. The roller bearing apparatus of claim 1 , wherein the first plurality of superhard raceway elements and/or the second plurality of superhard raceway elements includes gaps between adjacent ones of the superhard raceway elements thereof, and wherein one or more of the first plurality of superhard raceway elements and/or the second plurality of superhard raceway elements include at least one side surface forming a respective oblique angle relative to the axis, and wherein the respective oblique angle is selected to at least partially inhibit the gaps from impeding the rolling elements during operation.
12. The roller bearing assembly of claim 11 , wherein the respective oblique angle is greater than about forty (40) degrees.
13. The roller bearing assembly of claim 11 , wherein the respective oblique angle is about forty (40) degrees to about eighty (80) degrees.
14. A roller bearing apparatus, comprising:
a rotor including:
a first plurality of superhard raceway elements distributed circumferentially about an axis, each of the first plurality of superhard raceway elements including a raceway surface positioned and configured to form a first portion of a raceway;
a first support ring that carries the first plurality of superhard raceway elements;
a stator including:
a second plurality of superhard raceway elements generally opposed the first plurality of superhard raceway elements of the first roller bearing assembly, each of the second plurality of superhard raceway elements include a raceway surface positioned and configured to form a second portion of the raceway;
a second support ring that carries the second plurality of superhard raceway elements, and
a plurality of generally elongated rolling elements interposed between the rotor and the stator and being positioned and configured to roll on the raceway, one or more of the plurality of generally elongated rolling elements including one or more superelastic materials.
15. The roller bearing apparatus of claim 14 , wherein the one or more of the plurality of generally elongated rolling elements include a core body at least partially surrounded by the one or more superelastic materials.
16. The roller bearing apparatus of claim 14 , wherein the one or more of the plurality of generally elongated rolling elements comprises a hollow cylindrical body.
17. The rolling bearing apparatus of claim 16 , wherein the hollow cylindrical body comprises a nickel-titanium alloy.
18. The roller bearing apparatus of claim 14 , further comprising a cage configured to retain the plurality of generally elongated rolling elements between the stator and the rotor.
19. A method for manufacturing a roller bearing apparatus, the method comprising:
providing a plurality of rolling elements, wherein one or more of the plurality of rolling elements include one or more superelastic materials; and
providing a plurality of superhard raceway elements each of which includes a raceway surface positioned and configured to form at least a portion of a raceway for the rolling elements to roll over, at least a portion of the raceway exhibiting a first modulus of elasticity greater than a second modulus of elasticity of at least a portion of the one or more of the rolling elements, the first modulus of elasticity being about three (3) times greater to about fifty (50) times greater than the second modulus of elasticity.
20. The method of claim 19 , further comprising affixing the superhard raceway elements to a first support ring and a second support ring, and wherein the rolling elements are interposed between the superhard raceway elements of the first support ring and the superhard raceway elements of the second support ring.