NASA Technical Reports Server (NTRS) 20070010457: Survey of Dust Issues for Lunar Seals and the RESOLVE Project

0.84 MB·English

by  NASA Technical Reports Server (NTRS)

“Survey of Dust Issues for Lunar Seals and the RESOLVE Project”
By Margaret P. Proctor and Paula Dempsey

Abstract
Lunar dust poses a technical challenge for sealing applications on the moon. A survey of
seals used in Apollo lunar missions is presented as well as lunar soil characteristics and a
description of the lunar environment. Seal requirements and technical challenges for the
volatiles characterization oven and hydrogen reduction reaction chamber of the
RESOLVE project are discussed. The purpose of the RESOLVE project is to find water
or ice in lunar soil and demonstrate the ability to produce water, and hence oxygen and
hydrogen, from lunar regolith for life support and propellants.
1
v
o
g
.
a
s
a
n
.
w
h w
p w
c
n o
a h
r s
s y B k
al e r
s s o
e
p t W
n n
S
m
e o r
e
ar ct e n si t m
D o i n e
n e v
u oj a mp Di Ce st 06
y
L l
r u 0
r P a Co es ch e S 2 H
o P h r
ues f OLVE y and nical ructur esear d at t ary Ai 4-15, nd, O
s S B r a St R e d 1 a
s E to ch n nt n er el
I R c e d n e o b v
t o n s c e
s e r M a e e e m l
u P l C
D th P. he als A G Pr al/S ove
of d t ri S e N
n t f e
e o A S
n y a t
atio e ar m a N A
r M
nist v g a S
dmi ur ar e A
A T
e S M N
c
a s
Sp l 6
d a 0
n
a e
s 0
c S
uti 2
a
n
o
r
e
A
al
n
o
ati
N
2
v
o
s g
d ch or asa.
e u t n
g m c w.
n a n w
o s f o w
ol i al s iti
n pr 5 es nt e e os
atio e to h 200 ctiviti nme thos urfac dep
r g c a o n s e
o n r ir a m at
Expl challe on.” aut Ma urface to env ger th st fro elimin
nar nical e Mo tron nar s osed e lon rties e du e or
s e v
h h u p d z
s and Space Administration Challenges of Future Lu st represents the single largest tec human presence on t Harrison Schmidtt, Apollo 17 A he extent and duration of planned l gher than prior Apollo experiences. ystems and components will be ex r periods of time orders of magnitu eviously addressed. mitigation strategies: esign systems tolerant of dust prop evelop techniques to clean or remo ctive abatement methods to minimi nd/or adhesion of dust
autic Du T hi S fo pr st D D A a
n u
ero “ D 1. 2. 3.
A • •
al
n
o
ati
N
3
v
o
g
.
t a
f s
f ) om, g na
h o As g w.
art toal An iuon g. ba ww
ers lunar es to e signedum se (7075 e seal i0% ind0 cm l ealing. sealin due to
tain urn mpl s deacu box edgy (9, 15 in s dd’l aks
n eta lv or)e. a a e
o rs aa melles nt r l
C o e r uifavu i o l
eturn Boxes” Used tregolith Triple sprovide-610tor Aluminwith Knindium 10% silprior to to mad icone) f bstantia1ce
R e il ua
k • • • ct ir os srf
e c a u r d u
t q o s
pl o n e u a
R o r hg
m c fl n
“ e 4
6 i
a . s ur - , al
S a t 8 se
n s
e
. 0 s
ar .k ve es 6 oxn
stration un a pre d pr s (L k Bst o
mini L r n g cu
d e a n od
A
e o c ri R
ac l a e - r
Sp ol p s O 2 o
cs and Ap n s e u le e 1ial
auti o gl b her
on fl n u tt
er e o a
A i f
al T S D Om
n
o • • •
ati
N
4
v
o
g
.
a
s
e a
y n
g w.
o
w
a w
l
s al k
r a
e
m
e
n
l
i u
a f
i o
t d
n
n
s
o
i t

C r
o
o
t
e n p
l i e
p
l r
m a
o
e
a n
s

S
o
,
e
s
l
l l g n
o a
d o
p t
n e i
A
s
e
e s
m
i
f
m
i
n n
o k
o
r
i h ll
v o
t
n n i
atio E w p
str g A
mini l S. n
Ad a o of
e i .
c c S l
a d
Sp e m
d L n
n p
a c e
s S 0
c
uti 4 8 t
a
n 3 1 A
o
r
e
A
al
n • • •
o
ati
N
5
v
o

g
g .
l a
) n i s
n o a
a), ),mi d toeali ox www.n
K/ . s
P c g es t
Ko c n ng se- ry
4s ti i ur K
.8390 oa ar e su eth
(25(+(18 d c be weres elmwit
l r
e e p hd
)
z e Sa e
r i t et
h d s M a
y h
/ o c
b s Eb t
s gF n i
l s ( )r
Suit 5psio50 315 an a ainle uits esuit VAse-lub
720 S E
h t c r
ce 3.+0. ng wit r s ty pa s (nd
o is e
Spa ure: ate: k Ri . ted teri Mobilhe ivitied ae.
. c a n t t g
Apollo ng pressture: m leak r with use ing Nec -lock In 0-T6 tre have i hicular mets to cular Acre cleane leaka
atieramu d ch Air 07 cts vehel ehiweuc
Aeronautics and Space Administration ace Suits Designed to opertempmaxi Leakage increase ollo Helmet Atta Manufactured by Aluminum alloy 7 Helmet disconne Seals in the Extraattach the space neck ring. Between Extra-Vdisconnect seals and grease to red
al p p
n
o S A
ati • • • • • • •
N
6
v
o
g
.
a
s
a
n
.
t w
e w
w
m
h l
k c e
c at H
g i L
u
n )
q
P
i
R g M
n
C
k i
l
c a (

e e t
o
s
N l
- i
f P
l
g e
e
s
n
ul
i g
h d
n
c o
i
h
a M
c
t
t t
a d
A
l n
-

f a
t
l
e e m
m s
m

a
l g o
e
y n C
H
b i
l
n p g
o t
ati o ui u n k
ministr oll s co usi k oc he
Ad p o t o c l t
ce A t c h o n n .
pa d e s l o o g
S e n g e g t n
d t y
nal Aeronautics an Attach discon has…. Neck rin 8 latch ssembli A rotatin ng Push bu ssembl ocking ri
o t a i a
ati • I • • • r • l
N
7
v
o
. g
n a.
. s
m o a
it bric re- eal ry nis otati www.n
u a d sa a r
aces had f d anage. n lip e rot mech ove
p ek ih gl
o s ors anea resat tn. ck o0
o
es t nect e cleuce l etic suit ecti unlo s 36
uits glov con werred ynthace onn ock/ rmit
S . ed re ls to e sspe c d l pe
ce ings ach dwa seaase n ththe glov uate hat
pa ar att ar ctre oof e ct g t
S c. be ts al hust. nned g 54)ly th y a rin
lo bly k In . eel nec one d co an 960mbs at uall bea
ol m c 4 st n tih sil 5ea n
o T o at dio 4s a d
Aeronautics and Space Administration Ap ove Disconnect Asse Manufactured by Air-l Aluminum alloy 2024- Have interior stainless Pressure-sealing disc arms Wrist bearings and rotcoverings to keep out Between EVAsglove ubricated with Krytox Air-lock has a patent (used in the bearing asmotion locations, such The suit side has a m The glove has a seale
al l l
n G
o
ati • • • • • • • • • •
N
8
v
o
g
.
a
s
) a
1 n
-( w.
9 w
y 8 w
7
l A-
b
-
D
m
S
C
e
.
I

s e
m
s
u
A ol
V

t .
t
c i
n
e U

y
n t
i
l
n bi
o
o M

c r
a
s ul
c
i i
D h
e
v
a
e r
t
x
v E

o )
1
l 7
G 9
1
(
- k
s o
o
t b
i d
u n
n a
o S H
rati s
nist e on
dmi c ati
e A a per
c
a p O
p
S
d S lo
an ol
s o p
c A
auti ll e:
on o c
r n
e
A p e
nal A fer
o e
ati R
N
9
v
o
g
.
a
s
a
n n
i w.
s
m w
w
e
t
s
y
S

t
r
o
y p
p
it u
l Sm.
bi 7) e u
) pti 1 Lifosi
cs m psi sce ollo and ymp
μ 4 u p S
i l
t 5 s A oy
s 00 07 c ( ntrog
Soil Characteri Description 90% < 1000 μm, 70% < 1 Angular/subangularsharp 31.58 +g/cm 5-7 ( Mohsscale) 52% +2% 2; 0.52 KPa(.0053 kg/cm. Primarily non-toxic Not active in vacuum Highly charged <20 μm high ferromagneti -4 o1.72-2.95 x 10W/cm K 0.3 (compression index) Protection for Environmental Cos of the Lunar Materials Technol
t g
r sn
u
i
a Dd
e

n )e
) 2c
m ) 9o
on u c y se 19Pr
nautics and Space Administrati L haracteristic ze hape ulk Density (0-30 ardness orosity (0-15 cm) ohesion (0-15 cm) oxicity orrosiveness ectrostatic agnetic hermal Conductivit ompressibility (loo nce: Fuhs, S., Harris, J.(he Lunar Environment.
ero C Si S B H P C T C El M T C ret
A e
al ef
n R
o
ati
N