Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Rolling bearing, and main shaft support device for wind power generation

A technology for rolling bearings and rolling elements, which is applied in the field of rolling bearings, and can solve the problems of weak base material adhesion, small deformation ability, and damage to raceway surfaces, and achieve excellent peeling resistance, stress concentration reduction, and good compatibility.

Active Publication Date: 2021-04-30
NTN CORP
View PDF23 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The DLC film generates a huge internal stress when the film is formed. In addition, it has high hardness and Young's modulus, but due to its extremely small deformation ability, it has weak adhesion to the substrate and has disadvantages such as easy peeling.
If the DLC film is peeled off, metal contact will occur between the bearing parts, and the parts will wear out, causing wear powder to intervene in the rolling surface, causing damage to the raceway surface, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rolling bearing, and main shaft support device for wind power generation
  • Rolling bearing, and main shaft support device for wind power generation
  • Rolling bearing, and main shaft support device for wind power generation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～7、 comparative example 1～3

[0086] The substrates shown in Table 1 were ultrasonically cleaned with acetone and then dried. After drying, the substrate was installed in a UBMS device, and the base layer and the mixed layer were formed under the above-mentioned formation conditions. A DLC film was formed as a surface layer thereon to obtain a test piece having a hard film. The conditions for forming the surface layer are as follows: the degree of vacuum in the film-forming chamber in the above-mentioned device is 0.8 Pa, the bias voltage relative to the substrate is 50 V, and the ratio of the amount of methane gas introduced into the above-mentioned device to the Ar gas 100 (parts by volume) of the introduction amount is 1 (parts by volume). The results are also listed in Table 1. The film thicknesses in the table are the total film thicknesses of the three layers (base layer, mixed layer, and surface layer).

[0087]

[0088] For the obtained test pieces, use Figure 10 The 2-cylinder testing machi...

Embodiment 6

[0102] In Example 6, Ra and RΔq were at the same level as in Example 3, but the opponent aggressiveness was different. This is considered to be caused by the fact that Rsk becomes a positive value and the upward protrusion increases. In addition, from the results of Example 5, it is considered that it is not that the smaller the Rsk, the greater the wear of the opponent components, but that the value of Rsk not greater than 0 is important for the suppression of the opponent's aggressiveness.

[0103] Based on the above, in the present invention, in order to alleviate the stress concentration of the protrusion when the hard film is in contact with the counterpart, and to suppress the wear of the counterpart, the arithmetic mean roughness Ra and the root mean square slope RΔq of the roughness curve are used to The state of the substrate surface is defined.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
surface roughnessaaaaaaaaaa
hardnessaaaaaaaaaa
root mean square slopeaaaaaaaaaa
Login to View More

Abstract

Provided is a rolling bearing that has a hard film on the inner / outer ring raceway surface etc. of the rolling bearing, that improves the peel-off resistance of the hard film and exhibits characteristics inherent in the film, and that suppresses aggressiveness with respect to a mating material. The rolling bearing 1 comprises: an inner ring 2 having an inner ring raceway surface 2a on the outer periphery; an outer ring 3 having an outer ring raceway surface 3a on the inner periphery; and a plurality of rolling bodies 4 that roll between the inner ring raceway surface 2a and the outer ring raceway surface 3a. A hard film 8 is a structure made of: an underlayer that is formed directly on the inner ring raceway surface 2a and the outer ring raceway surface 3a and is composed mainly of Cr and WC; a mixed layer that is formed on the underlayer and is a graded composition composed mainly of WC and DLC; and a surface layer that is formed on the mixed layer and composed mainly of DLC. The arithmetic mean roughness Ra of a roughness curve on the surface of the hard film where the underlayer is formed is 0.3 [mu]m or less, and the root mean square slope R[delta]q is 0.05 or less.

Description

technical field [0001] The present invention relates to a rolling bearing in which a hard film containing diamond-like carbon is formed on the surface of an inner ring, an outer ring, and a rolling element as a bearing component, and in particular, relates to an application for bearing a high load, such as a main shaft of a wind power generator. Double-row self-aligning roller bearings such as supporting bearings. In addition, it relates to a main shaft support device for wind power generation including the double-row self-aligning roller bearing. Background technique [0002] The hard carbon film is generally a hard film called diamond-like carbon (hereinafter referred to as DLC. In addition, a film / layer mainly composed of DLC is also called a DLC film / layer). Hard carbon also has various names such as hard amorphous carbon, amorphous carbon, hard amorphous carbon, i-carbon, and diamond-like carbon, and these terms are not clearly distinguished. [0003] DLC using such a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/30C01B32/28C01B32/907F16C19/06F16C33/32F16C33/62F16C33/64
CPCY02E10/72C01B32/28C01B32/907F16C19/06F16C33/32F16C33/62F16C33/64Y02P20/133F16C2360/31F16C2206/04F16C33/585F16C33/34F16C23/086F16C19/38F16C2206/56F16C2240/56F03D80/70F16C2206/82F16C33/6696F16C19/166
Inventor 中西雅树三上英信
Owner NTN CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com