Your location:  Home  >  Bearing News  >  World Bearing News
<<  Back

NTN Receives Letter of Appreciation from JAXA for Contributing to Successful Launch of “H3 Launch Vehicle” Test Flight No.2

Resource from:  https://www.powertransmission.com Likes:265
May 29,2024

2.png

NTN Corporation (hereafter, NTN) has received a letter of appreciation from Japan Aerospace Exploration Agency (JAXA) for contributing to the development and successful launch of “H3 Launch Vehicle (H3TF2: Test Flight No.2)” through supplying all bearings to of the turbo pumps *1.

The turbo pumps feed fuel of liquid hydrogen and oxidizer of liquid oxygen into the combustion chamber of the engine. As liquid hydrogen is at -253°C (-423.4°F) and liquid oxygen is at -183°C (-297.4°F), which is cryogenic temperature, lubricant freezing is a concern for bearings used in impeller in turbo pumps. In addition, since the impeller rotates at high speed, bearings are required to have excellent high speed rotational performance.

NTN's bearings used in “H3 Launch Vehicle” adopt its proprietary solid lubricant that offers excellent lubricating performance even at cryogenic temperatures. In addition, by using reinforced fiberglass for retainer, we have secured the strength to withstand centrifugal force during high speed rotation. The use of ceramics balls, which is more lightweight than balls made from metal, suppresses the centrifugal force of balls when rotating. As a result, the product achieves high speed rotational performance with dmn value*2 of 2.88 million as a bearing for turbo pumps of “H3 Launch Vehicle” at cryogenic temperatures.

NTN will continue to contribute to the development of the aerospace field by developing and providing products with the functions required for the field.

Press release on February 19, 2024:
NTN Supplies Bearings to “H3 Launch Vehicle”
https://www.ntnglobal.com/en/news/press/news202400016.html

An indicator that expresses the rotational performance of bearings and it is multiplied bearing pitch circle diameter (mm) by rotational speed (min-1)


(https://www.powertransmission.com)
【CBCC News Statement】
1.The news above mentioned with detailed source are from internet.We are trying our best to assure they are accurate ,timely and safe so as to let bearing users and sellers read more related info.However, it doesn't mean we agree with any point of view referred in above contents and we are not responsible for the authenticity. If you want to publish the news,please note the source and you will be legally responsible for the news published.
2.All news edited and translated by us are specially noted the source"CBCC".
3.For investors,please be cautious for all news.We don't bear any damage brought by late and inaccurate news.
4.If the news we published involves copyright of yours,just let us know.

BRIEF INTRODUCTION

Cnbearing is the No.1 bearing inquiry system and information service in China, dedicated to helping all bearing users and sellers throughout the world.

Cnbearing is supported by China National Bearing Industry Association, whose operation online is charged by China Bearing Unisun Tech. Co., Ltd.

China Bearing Unisun Tech. Co., Ltd owns all the rights. Since 2000, over 3,000 companies have been registered and enjoyed the company' s complete skillful service, which ranking many aspects in bearing industry at home and abroad with the most authority practical devices in China.