Fundamental Research and Development of Double Reversing Drill using Superconducting Magnetic Gear

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K04233
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 18030:Design engineering-related
• Research Institution: Anan National College of Technology
• Principal Investigator: HARANO TOMOKI 阿南工業高等専門学校, 創造技術工学科, 教授 (20332067)
• Co-Investigator(Kenkyū-buntansha): 綿崎 将大 広島商船高等専門学校, その他部局等, 講師 (50791125) ; 田中 淑晴 豊田工業高等専門学校, 機械工学科, 准教授 (70455137)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 月面開発 / 掘削ドリル / 磁気歯車 / 2重反転 / 非接触 / メンテナンスフリー / 超伝導

Outline of Final Research Achievements

Using an axial magnetic gear with a reduction ratio of 3 and a diameter of 100 mm, we tested the transmission torque of 0.5-2.0 Nm and the rotation speed in a low-temperature, low-vacuum environment of -48°C and 0.1 Pa to demonstrate the applicability to the space environment. A power transmission performance experiment was conducted at 400 to 1400 rpm. It was found that a transmission efficiency of about 60% can be obtained when the transmission torque is 20 Nm or higher. It was found that there was a concern about a decrease in transmission efficiency due to heat generation due to In addition, a prototype of a double-rotating excavation drill with a total weight of 8.5 kg was completed using the partition wall of the axial magnetic gear and the double-rotating mechanism. We plan to verify the excavation performance in the future.

Free Research Field

機械要素設計

Academic Significance and Societal Importance of the Research Achievements

人口増加とともに地球上の資源不足が懸念され，人類の発展において宇宙開発が必須不可欠になりつつある．月面には地球資源の３０００年分があるとされており，その豊富なFe，Ni,Al，氷をはじめHelium2の資源は，開発国の所有物となる．また，火星探査や火星移住計画を推進する上で，中継基地と考えらえれる月面の資源開発は必要不可欠となっている．月面にはレゴリスと呼ばれる微細な砂が多数あり，これらが多種多用な設備機械に故障やトラブルを生じるとされており，宇宙環境に直接曝露せず動力伝達できる機構が必要不可欠となっている．以上の観点から，磁気歯車を搭載した２重反転掘削ドリルの研究開発は将来重要な役割を担う．