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

Grease, rolling bearing, rolling bearing device, and information recording and reproducing apparatus

一种滚动轴承、润滑脂的技术，应用在滚动轴承装置和信息记录重放装置,滚动轴承,润滑脂领域，能够解决难以得到耐久性滚动轴承等问题，达到优异耐久性、减少脱气量、耐久性优异的效果

Active Publication Date: 2016-07-27
SEIKO INSTR INC
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this grease, although the outgassing amount is small, it is difficult to obtain a rolling bearing with sufficient durability.

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
  • Grease, rolling bearing, rolling bearing device, and information recording and reproducing apparatus
  • Grease, rolling bearing, rolling bearing device, and information recording and reproducing apparatus
  • Grease, rolling bearing, rolling bearing device, and information recording and reproducing apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0182] Refined mineral oil (classified as Group III mineral oil in the API base oil category with a mass ratio of 3:7. The kinematic viscosity is ν 1 =47mm 2 / s (40°C), mineral oil with a flash point above 250°C) and PAO (a mixture of 3-5 polymers of α-olefins with 8-12 carbon atoms, the kinematic viscosity is ν 2 =30mm 2 / s(40℃)) mixed as base oil (kinematic viscosity ν=34mm 2 / s(40℃)).

[0183] Next, using the above-mentioned base oil and a cycloaliphatic diurea compound as a thickener, it is greased, and an antioxidant and a rust inhibitor are added and mixed. The ratio of each component was 86.0 mass % of base oil, 12.5 mass % of thickener, 0.5 mass % of antioxidant, and 1.0 mass % of rust inhibitor with respect to 100 mass % of grease.

Embodiment 2

[0185] The above-mentioned base oil and a cycloaliphatic diurea compound as a thickener were used for greasing, and a mixed extreme pressure agent was further added in addition to the antioxidant and rust inhibitor, and the same implementation as in Example 1 was carried out. The ratio of each component is: 85.0% by mass of base oil, 12.5% ​​by mass of thickener, 0.5% by mass of antioxidant, 1.0% by mass of rust inhibitor, and 1.0% by mass of extreme pressure agent, based on 100% by mass of grease. quality%.

reference example 1

[0193] As the grease, a commercially available rolling bearing grease α for an information recording and reproducing device was prepared. In addition, grease α contains a urea compound as a thickener.

[0194] Table 1 shows the results of outgassing measurement, durability test, and grease bump test in each of Examples and Comparative Examples. In addition, the results of the low-temperature torque test of the greases of Example 2 and Reference Example 1 are shown in Table 2, and the results of the long-term evaporation loss test are shown in Figure 7~9 middle.

[0195] [Table 1]

[0196]

[0197] [Table 2]

[0198]

[0199] As shown in Tables 1 and 2, including kinematic viscosity ν used at the ratio of the present invention 1 kinematic viscosity ν of PAO 2 The greases of Examples 1 and 2, which are high mineral oil base oils, had a small amount of outgassing. In addition, in Examples 1 and 2, there was little variation in torque in any of the durability test and...

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
flash pointaaaaaaaaaa
flash pointaaaaaaaaaa
flash pointaaaaaaaaaa
Login to View More

Abstract

Provided are grease containing a base oil and a thickener, a rolling bearing including the grease, a rolling device 6, and an information recording and reproducing apparatus 1. The base oil contains mineral oil and poly-alpha-olefin, a proportion of the mineral oil is 10% by mass to 40% by mass in 100% by mass of the base oil, and a kinematic viscosity v1 of the mineral oil at 40 DEG C is higher than a kinematic viscosity v2 of the poly-alpha-olefin at 40 DEG C.

Description

technical field [0001] The present invention relates to lubricating grease, rolling bearing, rolling bearing device and information recording and reproducing device. [0002] This application claims priority based on Japanese Patent Application No. 2015-009485 filed in Japan on January 21, 2015, and Japanese Patent Application No. 2015-236921 filed in Japan on December 3, 2015, the contents of which are incorporated herein. Background technique [0003] Information recording and reproducing devices such as hard disk drives (HDDs) are known as devices for magnetically or optically recording and reproducing various types of information on a disc. This information recording and reproducing device usually has: the swing arm of the magnetic head gimbal assembly (magnetic head) that records and reproduces signals in the disc is provided at the front end, the rolling bearing device that becomes the fulcrum of the swing arm's rotation, and the swing arm that rotates. actuator. By ...

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): C10M169/02C10M107/02C10M115/08F16C33/66F16C19/54C10N20/02C10N40/02
CPCC10M107/02C10M115/08C10M169/02C10M2205/0206C10M2215/1026C10N2020/02C10N2040/02F16C19/54F16C33/6688C10M2203/1006C10M2203/1025C10M2205/0285C10N2030/02C10N2030/06C10N2050/10F16C19/06F16C33/6633F16C2210/04F16C2370/12
Inventor 饭野朗弘中山幸博花冈水慧中村久哉用田裕树
Owner SEIKO INSTR INC
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