Bearing element

• US 8,033,733 B2
• Filed: 04/28/2006
• Issued: 10/11/2011
• Est. Priority Date: 04/29/2005
• Status: Active Grant

• Current Assignee: Miba Gleitlager Austria GmbH
• Original Assignee: MIBA Gleitlager Gmbh (Peter Mitterbauer)
• Inventors: Lang, Hubert
• Primary Examiner(s): Hannon; Thomas R
• Assistant Examiner(s): WAITS, ALAN B
• Application Number:
  US11/413,711
• Publication Number:
  US 20060245675A1
• Time in Patent Office: 1,992 Days
• Field of Search: 384/276, 384/297, 384/299, 384/300, 384/907, 384/908, 384/909
• US Class Current: 384/297
• CPC Class Codes: F16C 17/02 for radial load only
• CPC Class Codes: F16C 2208/40 Imides, e.g. polyimide [PI], polyetherimide [PEI] F16C2208/58 takes precedence
• CPC Class Codes: F16C 2360/22 Internal combustion engines in general F02B
• CPC Class Codes: F16C 33/201 Composition of the plastic
• CPC Class Codes: Y10S 384/907 Bearing material or solid lubricant

Abstract

The invention relates to a bearing element (1) with a metallic support body (2), a bearing metal layer (3) arranged over the top and a polymer layer (4) arranged on the top of the latter, whereby the polymer layer (4) consists of a polyimide resin, molybdenum sulphide (MoS₂) and graphite. The proportion of the polyimide resin in the polymer layer (4) is selected from a range with a lower limit of 60% and an upper limit of 80%, the proportion of MoS₂ is selected from a range with a lower limit of 15% and an upper limit of 25% and the proportion of graphite is selected from a range with a lower limit of 5% and an upper limit of 15%.

Claims

1. Bearing element for a combustion engine consisting of a metallic support body, a bearing metal layer arranged over the metallic support body and a polymer layer arranged on top of the bearing metal layer, whereby the polymer layer consists of a polyamide imide resin in an amount of 35 wt % dry resin, molybdenum sulphide (MoS₂) in an amount of 45 wt. % and graphite in an amount of 20 wt. %, relative to the total polymer layer, wherein the MoS₂ comprises MoS₂ platelets with an average length selected from a range with a lower limit of 10 μ

m and an upper limit of 40 μ

m, an average width selected from a range with a lower limit of 10 μ

m and an upper limit of 40 μ

m, and an average height selected from a range with a lower limit of 2 nm and an upper limit of 20 nm.

3. Bearing element according to claim 1, wherein the MoS₂ and the graphite are present in a ratio of MoS₂ to graphite selected from a range with a lower limit of 1.5:

1 and an upper limit of 4.5;

1.

4. Bearing element according to claim 1, wherein the graphite included has a particle size selected from a range with a lower limit of 2 μ

m and an upper limit of 8 μ

m.

5. Bearing element according to claim 1, wherein the bearing metal layer is in the form of an alloy, selected from a group comprising aluminium base alloys, tin base alloys, lead base alloys, copper base alloys, CuPb base alloys, AlSn base alloys, alloys based on AlZn, AlSi, AlSnSi, CuAl, CuSn, CuZn, CuSnZn, CuZnSn, CuBi and AlBi.

6. Bearing element according to claim 1, wherein a surface of the polymer layer has an arithmetic average roughness Ra selected from a range with a lower limit of 0.2 μ

m and an upper limit of 1.5 μ

m.

7. Bearing element according to claim 1, wherein a surface of the polymer layer has a maximum roughness profile Rz selected from a range with a lower limit of 3 μ

m and an upper limit of 8 μ

m.

8. Bearing element according to claim 1, wherein the polymer layer has an average thickness selected from a range with a lower limit of 1 μ

m and an upper limit of 40 μ

m.

9. Bearing element according to claim 1, wherein the polymer layer has a Vickers hardness selected from a range with a lower limit of 22 HV and an upper limit of 35 HV.

10. Bearing element according to claim 1, wherein the metallic support body, bearing metal layer, and polymer layer form a lubricated bearing half-shell or a thrust ring or a bearing bush.

2. Bearing element for a combustion engine consisting of a metallic support body, a bearing metal layer arranged over the metallic support body and a polymer layer arranged on top of the bearing metal layer, whereby the polymer layer consists of a polyamide imide resin, molybdenum sulphide (MoS₂) and graphite, wherein the polyamide imide resin is present in dry form in a proportion selected from a range with a lower limit of 23.08 wt.-% and an upper limit of 70.59 wt.-% relative to the polymer layer, the MoS₂ is present in a proportion selected from a range with a lower limit of 22.06 wt.-% and an upper limit of 48.08 wt.-% and the graphite is present in a proportion selected from a range with a lower limit of 7.35 wt.-% and an upper limit of 28.85 wt.-%, and wherein the MoS₂ comprises MoS₂ platelets with an average length selected from a range with a lower limit of 10 μ

m and an upper limit of 40 μ

m, an average width selected from a range with a lower limit of 10 μ

m and an upper limit of 40 μ

m, and an average height selected from a range with a lower limit of 2 nm and an upper limit of 20 nm.

11. Motor with a shaft which is mounted by at least one bearing element, and wherein the bearing element comprises a metallic support body, a bearing metal layer arranged over the metallic support body and a polymer layer arranged on top of the bearing metal layer, whereby the polymer layer consists of a polyamide imide resin, molybdenum sulphide (MoS₂) and graphite, wherein the polyamide imide resin is present in dry form in a proportion selected from a range with a lower limit of 23.08 wt.-% and an upper limit of 70.59 wt.-% relative to the polymer layer, the MoS₂ is present in a proportion selected from a range with a lower limit of 22.06 wt.-% and an upper limit of 48.08 wt.-% and the graphite is present in a proportion selected from a range with a lower limit of 7.35 wt.-% and an upper limit of 28.85 wt.-% and wherein the MoS₂ comprises MoS₂ platelets with an average length selected from a range with a lower limit of 10 μ

m and an upper limit of 40 μ

m, an average width selected from a range with a lower limit of 10 μ

m and an upper limit of 40 μ

m, and an average height selected from a range with a lower limit of 2 nm and an upper limit of 20 nm.