A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
ROLLING BEARING
PROBLEM TO BE SOLVED: To provide a rolling bearing including an alumina-zirconia-based ceramic rolling body, prolonging its service life and suitable to the rotation support part of a device contacting with liquefied natural gas.SOLUTION: In a rolling bearing having a metal bearing ring and a ceramic rolling body, the rolling body has a ratio of a first constitution phase mainly comprising ZrOand an oxide sintering aid agent selected from YO, SiO, CeO, TiO, CaO or MgO, and a second constitution phase comprising AlOof 55:45-95:5 based on mass ratio, and the number of zirconia masses of 10-30 μm is 15 per 300 mmor less.
【課題】アルミナ−ジルコニア系セラミックス製の転動体を備える転がり軸受の更なる長寿命化を図り、特に液化天然ガスと接触する装置の回転支持部に好適な転がり軸受を提供する。【解決手段】金属製の軌道輪と、セラミックス製の転動体とを有する転がり軸受において、転動体は、ＺｒＯ２と、Ｙ２Ｏ３、ＳｉＯ２、ＣｅＯ２、ＴｉＯ２、ＣａＯまたはＭｇＯから選ばれる酸化物焼結助剤とを主成分とする第１構成相と、Ａｌ２Ｏ３からなる第２構成相とが、質量比で、第１構成相：第２構成相＝５５：４５〜９５：５の割合であり、かつ、１０〜３０μｍのジルコニア塊の個数が１５個／３００ｍｍ２以下である。【選択図】図１
ROLLING BEARING
PROBLEM TO BE SOLVED: To provide a rolling bearing including an alumina-zirconia-based ceramic rolling body, prolonging its service life and suitable to the rotation support part of a device contacting with liquefied natural gas.SOLUTION: In a rolling bearing having a metal bearing ring and a ceramic rolling body, the rolling body has a ratio of a first constitution phase mainly comprising ZrOand an oxide sintering aid agent selected from YO, SiO, CeO, TiO, CaO or MgO, and a second constitution phase comprising AlOof 55:45-95:5 based on mass ratio, and the number of zirconia masses of 10-30 μm is 15 per 300 mmor less.
【課題】アルミナ−ジルコニア系セラミックス製の転動体を備える転がり軸受の更なる長寿命化を図り、特に液化天然ガスと接触する装置の回転支持部に好適な転がり軸受を提供する。【解決手段】金属製の軌道輪と、セラミックス製の転動体とを有する転がり軸受において、転動体は、ＺｒＯ２と、Ｙ２Ｏ３、ＳｉＯ２、ＣｅＯ２、ＴｉＯ２、ＣａＯまたはＭｇＯから選ばれる酸化物焼結助剤とを主成分とする第１構成相と、Ａｌ２Ｏ３からなる第２構成相とが、質量比で、第１構成相：第２構成相＝５５：４５〜９５：５の割合であり、かつ、１０〜３０μｍのジルコニア塊の個数が１５個／３００ｍｍ２以下である。【選択図】図１
ROLLING BEARING
転がり軸受
ENDO YUICHI (author) / SHIMIZU YASUYUKI (author)
2015-11-24
Patent
Electronic Resource
Japanese
SILICON NITRIDE BALL, ROLLING ELEMENT, AND ROLLING BEARING
| European Patent Office | 2023