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Bearing long in service life

A long-life bearing technology, applied to bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems that bearings cannot adapt to temperature, load, lubrication conditions, low contact fatigue strength, poor life reliability, etc., and achieve wear resistance Excellent toughness, increased eutectoid transformation point, and improved toughness

Active Publication Date: 2016-05-18
临清市万达轴承有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The grain size of the material obtained by this conventional heat treatment process can only reach grade 8, the contact fatigue strength is low, the wear resistance is poor, and the life reliability is poor
[0004] This conventional heat treatment process is increasingly unable to meet the development needs of high-reliability and high-comfort mechanical parts. For example, under the special and harsh operating conditions of engine rocker bearings, the bearings cannot adapt to their special temperature, load, Lubrication conditions

Method used

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  • Bearing long in service life
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 and figure 2 as shown, figure 1 It is a cross-sectional view of a bearing with long service life proposed by the present invention, figure 2 It is a structural schematic diagram of a bearing inner ring of a bearing with a long service life proposed by the present invention.

[0031] refer to figure 1 and figure 2 , a bearing with a long service life proposed by the present invention, comprising a bearing outer ring 1, a rolling element 2, and a bearing inner ring 3, the outer raceway surface of the bearing inner ring 3 includes three protrusions protruding toward the outer side of the bearing inner ring 3 31, the three raised parts 31 are connected in turn, and a concave part 32 is formed at the junction of two adjacent raised parts 31; the raised part 31 and the concave part 32 are both arcs; the three raised parts 31 are along the inner ring of the bearing 3 are evenly distributed on the outer raceway surface in the circumferential direction. ...

Embodiment 2

[0038] A bearing with a long service life proposed by the present invention includes a bearing outer ring 1, rolling elements 2, and a bearing inner ring 3, and the outer raceway surface of the bearing inner ring 3 includes three protrusions protruding toward the outer side of the bearing inner ring 3 31, three convex parts 31 are connected in sequence, and a concave part 32 is formed at the junction of two adjacent convex parts 31; the convex part 31 and the concave part 32 are both arcs; The circumferential direction is evenly distributed on the outer raceway surface.

[0039] The components of the bearing inner ring 3 include by weight percentage: C: 0.8%, Si: 0.35%, Mn: 0.55%, W: 0.3%, Mo: 0.35%, Nb: 0.07%, Al: 0.3361%, Cr: 2.29 %, B: 0.2%, Y: 0.05%, S≤0.015%, P≤0.02%, and the balance is Fe.

[0040] The preparation process of the bearing inner ring 3 includes: melting, pouring and heat treatment; wherein the heat treatment includes:

[0041] Austenitizing treatment: rai...

Embodiment 3

[0045] A bearing with a long service life proposed by the present invention includes a bearing outer ring 1, rolling elements 2, and a bearing inner ring 3, and the outer raceway surface of the bearing inner ring 3 includes three protrusions protruding toward the outer side of the bearing inner ring 3 31, three convex parts 31 are connected in sequence, and a concave part 32 is formed at the junction of two adjacent convex parts 31; the convex part 31 and the concave part 32 are both arcs; The circumferential direction is evenly distributed on the outer raceway surface.

[0046] The components of the bearing inner ring 3 include by weight percentage: C: 0.65%, Si: 0.42%, Mn: 0.52%, W: 0.37%, Mo: 0.27%, Nb: 0.09%, Al: 0.3218%, Cr: 2.3176 %, B: 0.12%, Y: 0.07%, S≤0.015%, P≤0.02%, and the balance is Fe.

[0047] The preparation process of the bearing inner ring 3 includes: melting, pouring and heat treatment; wherein the heat treatment includes:

[0048] Austenitizing treatment...

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Abstract

The invention discloses a bearing long in service life. The bearing comprises a bearing outer ring, a rolling body and a bearing inner ring. The outer rolling way face of the bearing inner ring comprises three protruding portions which protrude towards the outer side of the bearing inner ring, and the three protruding portions are sequentially connected; a concave portion is formed at the connecting position of every two adjacent protruding portions; the protruding portions and the concave portions are arc lines; and the three protruding portions are evenly distributed on the outer rolling way face in the circumferential direction of the bearing inner ring. The component of the bearing inner ring comprises, by weight percentage, 0.6% to 0.8% of C, 0.35% to 0.45% of Si, 0.5% to 0.55% of Mn, 0.3% to 0.4% of W, 0.25% to 0.35% of Mo, 0.07% to 0.1% of Nb, 0.3% to 0.4% of Al, 2.2% to 2.5% of Cr, 0.1% to 0.2% of B, 0.05% to 0.08% of Y, not larger than 0.015% of S, not larger than 0.02% of P and the balance Fe.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a bearing with long service life. Background technique [0002] Bearing is a supporting part in mechanical transmission mechanism, which is used to determine the relative movement position of the rotating shaft and other parts, reduce the friction coefficient during its movement, and ensure its rotation accuracy. Its quality and carrying capacity directly affect the work of the whole machine performance. [0003] High carbon chromium bearing steel is a large type of bearing steel and is the most commonly used steel for manufacturing bearings and bearing parts. The existing high-carbon chromium bearing steel heat treatment process is: quenching and heating at 830-850°C, keeping it for an appropriate time, quenching in oil at 30-80°C, and then tempering in a tempering furnace at 150-180°C for a certain period of time. The grain size of the material obtained by the conventional h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/58F16C33/62F16C33/64
CPCF16C33/58F16C33/62F16C33/64
Inventor 李海波姚燕超陈书龙喻鹏
Owner 临清市万达轴承有限公司
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