1 Training Purposes OnlyJEM MS MT INC1920 31407JMU-081200 (Ver. 1.0)

Notice : This technical data is furnished on the condition that it will be used by and disclosed to the receiving Cooperating agency and its contractors and sub contractors only for the purposes of fulfilling the cooperating agency’s responsibilities under the Space Station Intergovernmental Agreement (IGA) and Memorandum of Understanding (MOU). It shall not be used for any other purpose, nor disclosed or retransferred to any other entity or government without prior written

permission of the Japan Aerospace Exploration Agency (JAXA).

JEM MS MT INC1920 31407

Marangoni Surface (MS) Maintenance Inc19/20

Instructor: Yuki Kawai 　　　Takuya Takami

(yuki.kawai@jamss.co.jp) (takami.takuya@jaxa.jp)

2 Training Purposes OnlyJEM MS MT INC1920 31407JMU-081200 (Ver. 1.0)

Overview of MS Maintenance

Key Points during MS Maintenance

MS Maintenance Operations

Identify three maintenance operations.

Explain when each maintenance operation is required.

Explain what crew must attach to prevent crew contact to sharp edge.

Explain the parts where crew must not touch.

Perform three maintenance operations according to ODF.

Objectives

After this lesson the trainee will be able to:

3 Training Purposes OnlyJEM MS MT INC1920 31407JMU-081200 (Ver. 1.0)

Contents:

- MS Maintenance Overview

- Cooling disk O-ring exchange

- Airtight O-ring exchange

- Cleaning

- Key Points during MS Maintenance

- Acronyms

Page

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5

6

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11

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Lesson Outline

4 Training Purposes OnlyJEM MS MT INC1920 31407JMU-081200 (Ver. 1.0)

Install MS into FPEF

Exchange MS Cassette

Assemble MS -Install MS Cassette to MS Core -Conduct leak check -Install MS Core/Cassette to MS Body

Experiment -Form liquid bridge -Generate Marangoni Convection -Observe Marangoni Convection

If air tightness is not kept

If liquid bridge is collapsed

Marangoni Experiment Operational Flow MS Maintenance

Airtight O-ring exchange

MS Maintenance Overview

Cooling disk O-ring and absorbent exchange

Cleaning

:Crew operation is necessary.

There are three maintenance operations. All tasks need crew operations.

double airtight O-ring of MS Core and MS Cassette will be exchanged.

O-ring of cooling disk and absorbent in MS Core will be exchanged.

silicone oil in MS Core will be wiped off, furthermore “Cooling disk O-ring exchange” and “Airtight O-ring exchange” will be conducted.

Remove MS from FPEF

Disassemble MS

When MS Cassette is exchanged

5 Training Purposes OnlyJEM MS MT INC1920 31407JMU-081200 (Ver. 1.0)

Cooling disk O-ring and absorbent exchange- Open the MS Core door- Attach MS Heating Disk Cover- Wipe off silicon oil at Cassette inlet- Exchange MS Disk Inner O-ring- Wipe surface of MS Disk Outer O-ring- Exchange MS Absorbent at the back of the cooling disk- Remove MS Heating Disk Cover- Close the MS Core door

Cassette inlet

MS Disk Outer O-ringMS Disk Inner O-ring

MS Absorbent

Cooling disk O-ring and absorbent exchange

cooling diskMS Core

Thermo Couple

Sharp edge

Sharp edge

MS Heating Disk Cover

MS Core door

6 Training Purposes OnlyJEM MS MT INC1920 31407JMU-081200 (Ver. 1.0)

Airtight O-ring exchange (MS Cassette and MS Core)-Open the MS Core door-Attach MS Heating Disk Cover-Demate connector-Exchange MS Core Inner/Outer O-ring-Mate connector-Remove MS Heating Disk Cover-Close the MS Core door-Exchange MS Cassette O-ring(2)

MS Cassette O-ring(2)

MS Cassette

MS Core Inner O-ringconnector

Airtight O-ring exchange

MS Core

MS Core Outer O-ring

MS Heating Disk Cover

7 Training Purposes OnlyJEM MS MT INC1920 31407JMU-081200 (Ver. 1.0)

- Separate MS Cassette from MS Core- Clean inside of MS Core from cassette side- Blow silicone oil out of a limit switch sensor gap by Finger Pump- Open MS Core door- Clean heating disk and attach MS Heating Disk Cover- Clean inside of MS Core from MS Core door side- Blow silicone oil out of two limit switch sensor gaps

- Conduct “Cooling disk O-ring and absorbent exchange” and “Airtight O-ring exchange” - Remove MS Heating Disk Cover and close MS Core door

Cleaning

MS Core (cassette side) MS Core (MS Core door side)

Cleaning

cooling disk

heating disk

There are three limit switch sensors in MS Core to control cooling disk position

gap

limit switch sensors

limit switch sensor

8 Training Purposes OnlyJEM MS MT INC1920 31407JMU-081200 (Ver. 1.0)

Key Points during MS maintenance

Category Key Point

Crew Safety - Do NOT touch the edges of the cooling disk or heating disk by hand to prevent crew contact to sharp edge.- Attach MS Heating Disk Cover and MS Cooling Disk cover to prevent crew contact to sharp edge.

Time Critical Operations N/A

Dos and Don’ts - Do NOT touch the edges of the cooling disk or heating disk to avoid disk coating comes off for experiment success.

- Do NOT touch thermo couples(three) on the cooling disk.

- Do NOT touch limit switch sensors to avoid coating comes off.

Difficulty in Ops. N/A

Possible Mis-Ops. N/A

9 Training Purposes OnlyJEM MS MT INC1920 31407JMU-081200 (Ver. 1.0)

FPEFMS

Fluid Physics Experiment FacilityMarangoni Surface

Acronyms