Coating arrangement

Patent metadata

Field	Value
Publication number	US-9951427-B2
Application number	US-74514708-A
Country	US
Kind code	B2
Filing date	Nov 21, 2008
Priority date	Nov 29, 2007
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

A coating arrangement has the following characteristics: —particles having a scratch hardness greater than or equal to 9 and a median grain size that can be determined, —a coating having a thickness equaling approximately half the median grain size, —a coating carrier with a surface comprising recesses, wherein a portion greater than 85% of the recesses compared to a surface surrounding the associated recess is designed with a depth smaller than approximately 10% and/or a opening width smaller than or equal to approximately 15% of the coating thickness, and —the coating is applied to the surface of the coating carrier and surrounds the particles at least at a lower region oriented toward the coating carrier.

First claim

The invention claimed is:

1. A coupling comprising:
two shaft elements of a deep-sea wind power plant system, each of the two shaft elements defining a connecting end comprising a flanged-shaped widened shaft end, each flange-shaped widened shaft end having a planar flange surface, the planar flange surface having a Mohs hardness,
a perforated disk-shaped component having at least a front side and a side opposite to the front side, wherein the front side and the side opposite to the front side are formed having planar surfaces which are parallel with one another, the perforated disk shaped component being inserted between the respective planar flange surfaces of the flange shaped widened shaft ends of the two shaft elements,
the front side planar surface having a plurality of depressions formed therein and the planar surface of side opposite the front side having a plurality of depressions formed therein, the front side planar surface, the planar surface opposite the front side planar surface and the plurality of depressions collectively defining a coating carrier,
a coating arrangement applied to the coating carrier, the coating arrangement comprising:
a plurality of particles each particle having a Mohs hardness of at least 9 and a predetermined mean grain size, and
a coating applied to the coating carrier, so as to enclose the particles and having a thickness of about half of the particle mean grain size, wherein:
the coating includes a lower coating applied to the surface of the coating carrier, the particles being disposed on the lower coating, and an upper coating applied to an exposed surface of the lower coating, and
at least 85% of the depressions being formed such that each depression of the at least 85% of the depressions is surrounded by a surface environment and has at least one of a depth of less than about 10% of the coating thickness and an opening width of up to about 15% of the coating thickness in relation to a surface environment,

wherein the flanged-shaped widened shaft ends are implemented from a material which has lesser values than the coating carrier both in regard to Mohs hardness and also tensile strength,
wherein the perforated-disk-shaped component is assembled between the flanged-shaped widened shaft ends of the two shaft elements,
wherein the coupling is arranged to transfer a torsional load from a first shaft element of the two shaft elements to a second shaft element of the two shaft elements using solely a combination of (a) friction between each planar flange surface of the respective shaft element and the planar surfaces of the respective mating side of the perforated disk-shaped component and (b) mechanical engagement of a fastener passing through each respective aligned series of perforations extending through the two shaft elements and the perforated disk-shaped component,
wherein the friction includes a force provided by pressing the plurality of particles carried by the side of the perforated disk-shaped component into the respective flanged-shaped widened shaft end.

2. The coupling as claimed in claim 1 , wherein each of greater than 99% of the depressions has at least one of a depth of less than about 10% of the coating thickness and an opening width of up to about 15% of the coating thickness in relation to a surface environment surrounding each depression.

3. The coupling as claimed in claim 1 , wherein the depressions are formed such that each depression has a depth of up to 6 μm.

4. The coupling as claimed in claim 1 , wherein the depressions are formed such that each depression has an opening width of less than about 8 μm.

5. The coupling as claimed in one claim 1 , wherein the surface of the coating carrier is formed having a roughness Ra of up to 0.2 μm.

6. The perforated-disk-shaped component as claimed in claim 1 , wherein the coating carrier is formed having a Mohs hardness of at least 5.

7. The coupling as claimed in claim 1 , wherein the coating carrier is formed of a steel having a tensile strength within a range of about 600 MPa and about 800 MPa.

8. The coupling as claimed in claim 1 , wherein the surface of the coating carrier is formed by grinding.

9. The coupling as claimed in claim 1 , wherein the lower coating is formed having a thickness of about 5 μm.

10. The coupling as claimed in claim 1 , wherein at least one of the first, lower coating and the second, upper coating includes nickel.

11. The coupling as claimed in claim 1 , wherein at least one of the first, lower coating and the second, upper coating is applied by electroplating.

12. The coupling as claimed in claim 11 , wherein the first, lower coating and the second, upper coating are formed of a same material.

13. The coupling as claimed in claim 1 , wherein each of the particles has a Mohs hardness of 10.

14. The coupling as claimed in claim 1 , wherein the particles include a monocrystalline diamond.

15. The coupling as claimed in claim 1 , the coating arrangement further comprising a counter element having a Mohs hardness of about 5, the second, upper coating being pressed against the counter element.

16. The coupling as claimed in claim 1 , the coating arrangement further comprising a counter element formed of gray cast iron having a tensile strength within a range of about 400 MPa and about 500 MPa, the second, upper coating being pressed against the counter element.

17. The coupling as claimed in claim 1 , the coating arrangement further comprising a counter element having at least one of a hardness less than a hardness of the coating carrier and a tensile strength less than a tensile strength of the coating carrier, the second, upper coating being pressed against the counter element.

18. The coupling as claimed in claim 1 , wherein the perforated-disk-shaped component is divided into a plurality of sector-like subelements.

19. The coupling as claimed in claim 1 , wherein the perforated-disk-shaped component includes a plurality of axial passages for receiving fasteners.

20. The coupling as claimed in claim 1 , wherein the perforated-disk-shaped component has coding on a periphery of the component and adapted for acquiring a shaft speed.

21. The coupling as claimed in claim 20 , wherein the coding includes teeth.

22. The coupling as claimed in claim 1 , wherein the plurality of particles are positioned upon the lower coating, wherein the particles are positioned resting upon an exposed finished surface of the lower coating and projecting outward from the exposed finished lower coating, and
said upper coating is applied to the surface of the lower coating in an arrangement which encloses the particles and having a thickness such that the combined thickness of the lower coating and the upper coating is about half of the particle mean grain size.

23. The coupling as claimed in claim 1 , wherein the coating has a thickness within a range of about 45 μm to about 75 μm.

Assignees

• Horling Peter
• Kaiser Tristan
• Liesegang Hans Juergen
• Wagner Reiner
• Skf Ab

Inventors

• Horling Peter
• Kaiser Tristan
• Liesegang Hans-Jürgen
• Wagner Reiner

Classifications

• Y10T428/24521

  with component conforming to contour of nonplanar surface · CPC title

• Y10T428/24355

  Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.] · CPC title

• F16D1/076

  by clamping together two faces perpendicular to the axis of rotation, e.g. with bolted flanges · CPC title

• Y10T428/218

  Aperture containing · CPC title

• Y10T428/24612

  Composite web or sheet · CPC title