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Патент USA US2404494

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July 23, 1946.
v
‘ E_ G. HALE‘! ET AL
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2,404,494
ROTARY S'EAL
Filed Aug. 5, I945
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KSheets-Sheet 2
INVENTORS
ATTORNEY
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2,404,494
Patented July 23, 1946
UNITED STATES PATENT ‘OFFICE
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2,404,4945Kk
a.
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ROTARY SEAL-Iii}. 3 ‘ "
Edwin G. Halby and ‘Robert JL Bu'shong, Marion,- "
Ohio, assignors to The MarionxSteam Shovel;
Company, Marion, Ohio, a corporation of .Ohio
Application‘ August 5, 1943, set-a1 No. 497,416 "
23 Claims. (01. 285-963)
1
This invention relates to a rotary seal andv is
designed primarily for sealing a connection be
tween a source of ?uid under pressure, usually
air, and a shaft or other element having alongi
tudinal passage or passages for conducting fluid
to a ?uid operated device or devices. :
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may be applied to shafts or other rotary structures
of variouslkinds, either vertical‘or horizontal.
' The rotary seal comprises two members one of
whichlis rotatable with relation to the other and
which are. connected respectively .with a rotary
part and a relatively’ stationary part of the mech
anism to which the seal is applied. The machine
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-One object of the invention is to provide ade
vice of simple compact construction which will
to which the sealis applied in the illustrated em
effectively seal a connection between a rotary
bodiment includes a base I which is supported
member ‘and a stationary member, one of which 10 .by'traction wheels; not shown, and has an up
is connected with a source of ?uid supply and the
wardly' extending ‘tubular part or center pin 2
other of which is provided with one or more ?uid
about» which 'revolv‘es a platform, not shown,
passages.
which carries the power- plant and the excavating
.
A further object of the invention is to provide
mechanism. Rotatably supported in the center
such a sealing device which will individually and 15 pin is a shaft 3, the upper end of which extends
effectively seal each of the connections between a
above‘ the platform and‘is connected by a gear -4~
, source of ?uid supply and a plurality of passages
in one of saidmembers.
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withidrivin‘g mechanism‘ on the platform,i and
the lower end of which is connected by' a gear
5 with the mechanism for propelling the traction
.
-A further object of the invention is to provide
such a sealing device havingseparate sealing ele 20 device.v Extending through the shaft ‘3 are a
ments for the several connections between ‘the
plurality of longitudinal passages which are con
member which is connected. with the source of
nected at their upper ends with one member 8 of r
?uid supply and the passages in the. other
the rotary seal and at their lower ends with fluid
member.
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operated devices supported by the base. The
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M2::
passages may be provided in any suitable manner
such‘a sealing-device in which each of said pas_ "3 and, in the present construction it is desirable
that they be separate from the shaft so that the
sages is connected with'a' source of ?uid supply
- A further object» of the invention is to provide
by a separate conduit.
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latter may rotate with relation thereto. When,
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as‘in the present instance, the shaft is of sub
? A further object of the invention is to provide
such a seal in which the sealing element is auto 30 stantial length it is preferably tubular in form
and the passages comprise pipes ‘I connected at
matically adjusted to compensate for wear. 4
A’ further object of the invention ‘is to provide‘
their upper ends to the member 6 of the seal,
I such a seal in-which the supply of ?uid to one
which is held against rotation with the shaft, and,
or more of said passagesimay be interrupted with
connected at their lower ends with a member
out affecting the supply of fluid to the other pas-_ 35 extending into the shaft and having passages‘ll
connecting the pipes ‘I with other conduits I0
leading to the respective ?uid operated devices.
Other objects of the invention may appear as
The member 8‘is anchored to the base I by a ‘bar
the device is described’ in detail.
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II to prevent its rotation with the shaft. Pref
In the accompanying drawings:
erably the members 5 and 8 are rigidly connected
Fig. 1 is a perspective view of ‘a rotary seal
one with the‘other, as by a cylindrical member
embodying my invention; Fig. 2 is a sectional view
I2. The other member I3 of the rotary seal is
taken centrally through such a seal; Fig. 3 is a a ‘
connected with the platform for rotation there
top plan View of the seal, partly broken ‘away to
with, as by brackets l3a. Thus the member 6
show the sealing elements within the same; Fig.
constitutes
the stationary member, of the seal,
4 is a top plan view of the rotor of'the seal; Fig. mi herein called the stator, and the member l3
5 is a section taken onthe line 5,,—5 of 'Fig- 3;
constitutes the rotary member of the seal and is
therein referred to as the rotor- However, either
3;
Fig.and
6‘ is
Fig.7
a section
is a sectionalview
taken ontheshowing
line 6-6
a slightly
of
member of the rotary seal may be the rotary
modified form of the seal. _
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member and in some installations the member 6
In these drawings we have illustrated one ;em-_ “ is connected with the shaft, or other rotatable
bodiment of our invention and have, shown the
device, for rotation therewith and the member
sage
or
passages.
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same in connection witha vertical shaft ofjan
excavating‘ machinegbut it is tosbe understood
hat. the. invention . may: take . various forms; and.
I3 is held against rotation. Therefore the terms
"rotor” and ‘,‘stator” arev to wbe'considered terms
of description and not of limitation.
I V
3
4
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portions of the bores, beyond the ports, being
The two members of the rotary seal may take
plugged, as shown at 23. In the present instance
the elongate part I? of the stator is of consider
able length and for convenience of assembling
and servicing is divided transversely into two
parts which are rigidly connected one with the
other by'screws 24 and the connection is sealed
various forms and may be connected one with
the other in any suitable manner. One member
is provided with a passage or passages to com
.municate with the passage or passages in the
shaft and has _a smooth surface opposed to an
adjacentisu'rface of the other member and con-7.v
by a 'gasket'25 through which the several pas- V
stituting a sealing ‘surface through which the}
sages extend.
passage’ or passages therein extend; The other
member is provided with means for connecting-J T -_ The rotor l3 may be of. any suitable construc
tion which will permit the stator to bev rotatably
the passage or passages ‘of the ?rst mentioned
connected therewith and maintained in proper
member with the source of ?uid supply and "for
relation thereto, and the means for connecting
sealing the connection or connections; In the
' the stator passages with the source of fluidsup
arrangement here shown the ‘passages are vinrthe
ply and for sealing said connections may take
stator and the connecting and sealing means are
various forms. Preferably, the rotor comprises a
in the rotor but this arrangement may be re- _
‘circular housing adapted. to receive the head ‘ii
versed when desirable. Preferably a separate
of the ‘stator and having an opening in one end
sealing element is provided for each passage of
thereof through which the elongate portion i2 of
the stator and the sealing element is provided
with an opening therethrough' which is in con 20 the stator extends, and in which the stator is
rotatably supported. Ashere shown the housing
stant communicationwith the ?uid source and
with the'passage in the stator with which that
sealing element is associated, the communication
between the opening in the sealing element and
is formed in two parts‘ and comprises upper and
lowerend walls 26 and 21', the lower wall being
spaced from the upper wall bya circumferential
the passage in _ the: stator being established 25 wall 28, and the upper walliandthevcircurnferen
tial wall having opposed . radially,;,extending
‘ 1 through an annular channel which: is in constant
V ‘
?anges 29 rigidly connectedone .to the other by '
communication with both the passage and'the
bolts 30. The head 2| ofthe stator is supported
opening and is preferably formed in the sealing
element. The sealing element. is so arranged 1 in the space between the upper and lower walls
with relation to therotor that it is subjected to 30 of the housing and the ‘outer elongate portion 12
of the stator extends through a relatively large
the pressure of the incoming ?uid and is pressed
opening Si in the lower'wall of the housing. Ar
therebyinto ?rm sealing contact with the sealing
ranged between the stator and the lower wall of
surfaceof the stator. In the preferred arrangee
the ‘housing is an anti-friction bearing, the inner’
ment the stator is connected with the end of -'a
shaftand the opposed surfaces of the stator and 7 race 32 of which is securedto the stator and the
outer race 33 ,of which is secured to. the lower
the rotor extend transversely‘to that shaft, vbut
‘wall of the housing, the .::'arrangement of the
7 this arrangement is not essential to the operation
bearing being such that the head 21 isvsupported ~
of the seal.
' In the constructionhereillustrated the‘. stator
outiof contact with-the housing. :.
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- The upper wall 26 of the rotor is provided in ,
its inner surface with a. plurality of annular
recesses 34 which are concentric with the axis
as a whole is indicated at 6 and. extends into the
rotor- {37, which rotates about the'same- "The
' stator comprises an elongate part 12 one; end of
of the stator and face the sealing surface there
of, the radii of the several recesses being such
that each recess is located above the port of one
of the passages inthe rotor. These recesses
which is adapted to besupportedon the shaft 3
; ‘andrheld against rotation therewith;and,_also in
cludes a part'provided with a smooth transverse
surface.‘ [4 c'onstitutinga sealing’ surface. The
stator is formed withiaplurality‘of passages, in
. may be connected with a source of supply of air
,th‘e‘present instance ?ve, as shownat l5,: l6, H,
or other ?uid under pressure in any?uitable.
corresponding passages‘! in the shaft 3 andjex
the v?uid source,‘ as by individual conduits 35
which communicate with the outer portions of
the respective recesses,“ Preferably the inner
surface of the upper 'wall of the housing is sup
ported out of contact with the sealing surface
M of the stator and supported in each ‘annular
l8 and l.9,~.which are arranged in longitudinal '1' 1‘ manner and in‘ the preferred arrangement the
alinement with and inopen communication with 50 several recesses are separately connected with
tend through the sealingrsurface M: at points
spaced different radial distances from the axis
of the stator, the sealing surface being‘ of a'diam- i‘
eter suf?cient to permit the proper spacing of 55
thepassages therein. In the present construc
tion the inner end portion of the stator, which
has the sealing ‘surface, is in the form of'arela
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recess is an annular sealing member 36 which
is arranged to have sealing contact with the
sealing surface of the stator and is provided
stant'ially ‘greater thanthe diameter of the‘elon 60 with an annular channel which has constant
gate outer portion [2 of the stator, and each. of
communication with the fluid source and with
the port‘ of the vstator passagewith which that
the passages l6, l1, l8 and I9 includes a later.
allyextending portion Him l'la, 18a and. 19a, “in recess is ‘associated. In the present instance the
V .tively thin circular head 2| of a diameter. sub
formed in the head 2|v and leading to a second 1* channel comprises a groove 31 formed in the
longitudinal portion or port which opens through 65 inner surface of the sealing element between
the lateral edges thereof,‘ and extending over
'the'sealing surface M, as shown at- IBb, lib‘, I81)
and having constant communication with the
and‘ l9b.- The longitudinal portion of the pas
; sage l5 isat theaxis of the rotorandthe lateral r corresponding port inthe sealing. surface Hi, the
portion of that passage and‘theport therefor are j lateral portions of said inner surface of said
formed by, a short channel 22 in the 'sealing'suré 70 sealing element being in contact with said seal
in'g surface.’ Each-sealing element has one or
race, Thelongitudinal portions oftheother pas
more openings :38 extending ' therethrough' and
sages are arranged aboutthe lpas'sa'ge'l I5‘ and the
"lateral portions'itvhi‘ereof are 'roijmea tyi 'substa'nl
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75
tially radial bores ‘in the head/21 fleading' respect; -
.;ivelyto the ports i519, l'lb, IBbVand i912, the end
connecting the groove '3‘lfther'ein withv the outer
portion of therec'ess and with ithe‘isource of ?uid.
The sealing element is transversely movable in
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5.
ment the diameters of the remaining annular red
cesses and sealing elements maybe shortened and
the overall size of the sealing surface correspond
the recess and the outer surface thereof is spaced
from the outer wall of the recess so that the
inner surface thereof may be pressed into ?rm
sealing contact with the sealing surface of the
rotor by the pressure of the ?uid entering the
ingly reduced.
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It will be apparent from the foregoing descrip
tion that a constant supply of ?uid under pres
recess, or by any other suitable means.
sure to the shaft passages may be maintained
Arranged in the outer portion of the recess is
without leakage, as the grooves. in the annular
means for preventing the passage of ?uid between
sealing elements are at all times in open commu
the sealing element and the side walls of the re
cess, and in the arrangement shown, this means 10 nicationwith-therespective stator passages and
comprises a pair of sealing rings 39 arrangedto
with the ?uid source, andithe pressure of the
have sealing engagement with the respectiveside
?uid on theiannular sealing elements maintains
the relatively large inner surfaces thereof in ?rm
walls of the recess and with the adjacent ‘por
contact with the sealing surface of the rotor and
tion of the sealing. element therein, ‘the outer
portion of said sealing element being of a'width'
less than the width of the corresponding portion
provides‘a highly e?icient seal. The sealing ele
ments are, automatically adjusted to compensate
of the recess to provide spaces in which the seal
for wear, due to the fact that their inward move
ment under pressure is limited only by their con
ing rings may be seated. Preferably the outer
tact with the sealing surface of the stator, The
portions of the lateral surfaces of the sealing ele
ment converge outwardly, as shown at 40, to 20 several stator passages being connected withthe
source of ?uid supply by separate conduits it is
form tapered channels between the same and
possible, by providing the supply conduits with
the respective walls of the recess into which the
Valves, not shown, to interrupt the ?ow of ?uid
sealing rings may be pressed by theaction, of
to one or more of the shaft passages whenthe
the ?uid thereon. The sealing elements and the
device supplied bythat passage is not in use and
sealing rings may be formed of any suitable ma
to accomplish this without in any way affecting
terial but we prefer that the sealingelements<36
the supply of ?uid to the other passages.‘
shall be formed of a relatively hard material hav
‘-While we have shown and described one em
ing a low coefficient offriction, such as graphite,
bodiment of our invention, and a minor modi?
and that the sealing rings be formed of yielda-ble
cation thereof, we wish it to be understood that
we do not desire, to'be limited to the detailsthere
material, such as soft rubber, which can be dis
torted into tight sealing contact with the coop
crating surfaces.
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Preferably the sealing elements are positively
of as various modi?cations may occurto a person
skilled in the art.
:Having now fully described our invention, what
connected with the rotor so that they will not be
displaced by their contact with the stator, and In, werclaim as-new and desire to secure by Letters
this may be conveniently accomplished by studs
4| (Fig. 6) mounted in the outer walls of the
annular ‘recesses and extending into sockets 42 in
the respective sealing elements. It is also desir
able to lubricate the sealing surface of. thesta
tor and for this purpose there is formed in the
outer wall 26 of the rotor, outwardly beyond and
transversely to the annular recesses 34, a lubri
cant receptacle or channel 43 (Fig. 5) and open
ings 44 are formed in said wall between adjacent
annular recesses to conduct lubricant'from the
receptacle to the sealing surface.
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In the construction shown in Figs. 1 to 4 the
axial passage IS in the stator is provided at its
Patent, is:
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fail: In a rotary seal, a stationary member and'a
rotatable member,v one of said members having
a sealing surface adjacent the other member and
having. a plurality of passages extending. through
said sealing surface, a plurality of annular seal
ing elements supported between said members
and engaging said sealing surface, ‘each sealing
element having an annular channel in constant
communication with one of said passages in said
sealing surface, said other member having means
for-separately connecting the channel of :each
sealing element with a source of ?uid supply and’
for pressing said-sealing element into ?rm con_
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inner end with a lateral extension or‘ channel in 50 tact with said sealing surface.
2. In a rotary‘ ‘seal, a stationary member'and
the sealing surface thereof so that it may be
a rotatable membersone of saidmembers having
sealed by an annular sealing member, which pro
a sealing surface adjacent the, other member and
vides a relatively large sealing surface and has
having a plurality of passages extending through
a correspondingly large surface exposed to the
action of the ?uid to pressthe sealing element 55 said sealing surface, said other member having
against the sealing surface. However, this is not
essential and,‘ if desired, the lateral extension to
the axial passage, the innermost of the annular
recesses, which communicates with that passage,
and the annular sealing element, associated there
with may be omitted, and inlieu thereof an ax
ial recess 45 may be formedin the upper, or outer,
wall 26 of the rotor, as shown in Fig. 7, and con
nected with the source of ?uid by a conduit 35.
Mounted in this. recess is a tubular sealing ele 65
ment '46 having aLfrusto-conical end portion and
a central passage 4‘! connecting the recess 45
with the axial passage IS in the stator. A single
a plurality of concentric annular recesses ar
ranged about the axis of the rotatable member
and facing said sealing surface, and also having
means for separately connectingv said recesses
with a source of ‘fluid supply, and an annular
sealing element supported in each of said recesses.
in contact with said sealing surface and having
an annular channel in constant communication
with said recess and with one of said passages.
. 3. In a rotary‘ seal,‘ a stationary member and
a rotatable member, one of said members having
a sealing surface adjacent the other member and
having a plurality of passages extending through
said sealing surface, said. other member having .
sealing ring 48 extends about the conical endv
portion of the sealing member 46 and is pressed 70 a pluralityof annular recessesarranged"about
theaxis of the rotatable member and facing said’!
into sealing contact with said end portion and
sealing surface, and also having means for con
with the wall of the ‘recess to prevent the passage
of ?uid between the ‘sealing element and the wall ,
of the recess, iWhenthe tubular sealing‘ element
is thus substituted‘ for ‘the annular sealing ele-1
, necting said recesses. with a source of‘ ?uid sup
ply, an annular sealing member supported inr'each
of said ‘recesses in contact with‘ said: sealing ~sur-.
2,404,494
8
Venting the passage of ?uid between ‘said ‘sealing
spaced from they lateraledges thereof and incom
sta'nt- communication with "said: passage, said
sealing‘ element; also‘ having an opening there
through connecting said groove with theouter
element and the side walls of saidv recess‘. ,
portion of said recess,‘ and means for preventing .
face and; having an annular channel in constant“
communicationwith said ‘recess and with one of‘
said passages, and means in said recess for‘preé
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the passage off?uid between said sealingelement
4. In a rotary seal, a stationary member and
and the sidewalls of said- recess, said other mem
, a rotatable member, one of said members having
ber having means, for connecting the outer por
a sealing surface adjacent the other member and
tion of said recess with a source of fluid supply.
having a plurality of passages extending through
said sealing, surface, said other member having 10 8'. In a rotary seal,_two members one of which
is rotatable withrelation to the‘ other, one of said
a plurality of annular ‘recesses arranged about
the axis of the rotatable'member and facing said‘
' sealing" surface, ‘and also havingmeans forcon
members having a surface transverseto the axis
of the rotatable memberand also having a pas
necting said recesses with a source of ?uid sup'j
sage extending through saidtransverse surfaceat- '
ply, an annular sealing‘ element supported in‘
‘each of said recesses and. having in that surface
thereof which is adjacent said sealing surface an
a point spaced from'said axis‘, thejo'ther member
havingv a part opposed to'said transverse surface
and provided with a recessjan'annular sealing
annular. groove in‘ constant communication with
element ‘extending aboutisaid axis, arranged to’ v
said recess and with one of saidpas'sagessaid
have sealing ‘contact with said transverse surface
surface of said, sealing element having sealing
contact with said sealing surfaceon each side 'of
and extending into said recess, said'sealingiele
said groove, each recess and ‘a portion of the seal
communication with said passage and with said,
ing element Within saidrecess having converging
surfaces at the respective sides of saidsealing ele-‘
recess, said other member having means where
'm'ent, and sealing members arranged‘ between
said converging surfaces.
f
ment having an annular channel '- in constant
by said recess may beconnected witha source of
25
supply of. ?uid under pressure. ‘
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9. ‘In a rotary seal having two members one‘. of
which‘. is rotatable with relation’ to the other, one
,5. In a'rotary seal, a stationary member’ and
of saidr'nembers having a surface transve'rseto
a sealing surface adjacent the other member andv
the axis of the rotatable member, and also'nav
having a passage extending through said ~sealingv 30 ing a passage extending through said transverse
surface at a point spaced from the axis of the
surface at a point spaced from said axis, the
rotatable member, an' annular sealing, element
other member having a part opposed to said
supported by said other member with one surface
transversesurface and provided with a recess, an
' a rotatable member, one of said members having
thereof in contact with said sealingwsurface, one
annular sealing element extending about said
I’ of said surfaces having an annular groove in cone 35 axis, arranged to have sealing contact with said
stant communication with said passage and so
transverse-surface and extending into said recess, ,
saidsealing element ‘having an annular channel
sealing element th'at‘the la'ttermay have contact‘
in» 'constant‘communication with said passage,
with said'sealing surface on each side of said
and with ‘said recess, and sealing means in said
groove, said sealing element having ‘a passage 40 recess toprevent the passageof' i?uid between
therethrough communicating with said groove;
said sealing element and the walls of said recess,
"and said other ‘member having means for con
‘said other member having means wherebyasaid
meeting said passage in‘said sealing element with
recess maybe connected‘with a source .of supply '
' arranged with relation to said‘ surface oflsaid
a source of ?uid supply.
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of fluid under pressure'to supply ?uid to said‘ pas
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6. In a rotary seal, a stationary member and a 45 sage and exert‘, pressure on said sealing element
rotatable member, one of said members havin'ga‘
sealing ‘surface adjacent the other member and
'10. In a rotary seal, two members one of which
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and
said-sealing
means.
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having a passage e'xtendingthrough said sealing
is rotatable with relation to'the other,-"o‘neiof
surface‘ ‘at a point spaced from-the axis of the
said members having a su‘rfac'etransverse to the
50
rotatable member, said other member having an
axisjof the ‘rotatable member and also ‘having. a
passage extending through said transverse sur
face at a point spaced from said axis, the other
‘ , annular recess arranged about and spaced from
‘ 7 said axis, an annular sealing element supported
in said recess with one surface thereof in contact‘
' member having- a part, opposed to'said transverse ,
surface and" provided with a recessextending
with said sealing surface, ‘one of said surfaces
' being provided with an- annular groove in con
55. about and-spaced from said axis, an annular seal-;
stant communication with said' passage, and so
ing- element supported in said’ recess for move
merit in the‘ direction'of its axis into sealing ene
gagement with said transverse surface, said seal
.with said sealing surface on each side ofsaid
ing element having between ‘the lateral‘ edgesof
groove, said sealing element having an opening
that surface thereof which is adjacent said
therethrough connecting said groove with the
transverse surface an annular groove concentric
- outer portion of said recess, and said other mem-‘
with said axis and communicating with said pas
her having means ‘for connecting the outer po'rév
sagewand with said recess, and meansfor'pre
venting the passage of ?uid between saidsealing
tion of said recess with a source of ?uid supply.
7. In a rotary seal,’ a stationary member and 65 element and the'side walls‘ of said recess, said
a rotatable member, oneof said members hav
other‘ member having'm'eans whereby said recess
, * ing a sealing surface adjacent the other member
maybe connected with a‘ source of fluid supply;
' and having a passage extending through said}
I: 11. In“ airotary seal, two members one of which
sealinggsurface at a point spaced from ‘the axis,
isrotat'able with relation to’ theeother', one 'ofsaid
of 'the "rotatable, member,’ said other member 70 members having a surface transverse to the axis
of the rotatable member and" also ‘having. a‘ pas;
7 1 having an annular recess arranged aboutand
arranged with relation to said surface of said
sealing element that the latter mayhave contact‘v
1 V spaced from said axis, anannular sealing‘ ele-,
sage extending through said transverse .surface' 7
ment supported in said recess with one surface
ate; point spaced from said axis,- the other" mem
thereof incontaotewith said‘ sealing surface and '
her, having apart opposed to'said transverse S1111?‘
'havin-gl'inisaid surface thereof an annular groove
face and provided‘ withan ‘annular recess extend-1
2,404,494
‘ing about and spacedffr’om‘. said axis andlalso ' -, into sealing contact ,with the diverging surfaces on
having means whereby said recess: may be con
the respective sides of ‘said, sealing element by the
nected, with a ‘source-of supply for ?uid under
pressure of the ?uid in said recess.
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pressure, anv annular sealing element supported
‘ v.15‘. In a rotary seal, a stator having at one en
in said recess and arranged‘ to be pressed into
thereof a transverse surface provided with a plu
‘ sealing engagement with said transverse surface
rality of ports spaced apart radially and circum
by the pressure of the ?uid-entering said recess,
said sealing element having an annular groove
concentric with said axis and communicating
ferentially and a plurality of longitudinal pas
sages communicating with the respective'ports, a
rotor having a surface substantially parallel with _,
with said recess and with said passage, ‘and pres 10 and adjacent to said surface of saidv stator and
sure controlled means in saidv recess to prevent
provided with a plurality of radiallyrspaced an
the passage of ?uid between said sealing‘ ele
nular, recesses concentric with the axis of said
ment and the side walls of said recess.
rotor, and annular-sealing elements inthe respec
12. In a rotary seal, two members one of which
tive recesses adapted to have sealing contact with
is rotatable with relation to the other, one of said 15 saidsurface of said stator and having thereingane
members having a surface transverse to the axis
nular grooves concentric with the axis of said
of said-rotatable member and also having a pas,
rotor; and communicating with. the 'respective
sage extending through said transverse surface
ports, andalso having passages connecting said
at a point spaced from said axis, the other member
grooves with the respective recesses, means in said
having apart-opposed to said transverse surface‘ 20 recesses to prevent the'passage of ?uid between
and‘provided with an annular recess extending
said sealingelements and the walls of said recesses,
said stationary member having means whereby
about said-axis, an annular sealing element sup
ported in said recess with one face thereof in
saidrecesses may be separately connected with a
contact with said transverse surface and having in '
said face an annular groove concentric with said
source of ?uid under pressure.
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, 16. In a rotary seal, astator having at one end
axis-and communicating with said passage and
thereof a head of enlarged, diameter provided with
with said recess, said other member having means
a transverse surface having a'plurality of ports
spaced ‘apart radially‘ and circumferentially, said
whereby said recess may be connected with a
source o'f'supply of ?uid under pressure, and seal
stator also havinga plurality of longitudinal pas
ing rings in said recess cooperating with said seal 30 sages andlateral passages in said, head connect
- ing element and the'walls of ‘said recess to pre
vent the passage‘of "fluid: between said sealing ele
ment and said walls.
13. In a rotary seal, two members one of which
ing said‘ "longitudinal passages withthe respective
ports‘; arotorsupported aboutsaid head and-hav-v
ing apart substantially parallelwith and adja
cent-to the transverse surface of said head,. said
is rotatable with relation to the othergone of 35 part-ofi-said rotor having a plurality of radially
said-members‘having a surface transverseito the
spaced annular recesses, concentricwith the axis
axis of the rotatable'member and also having a
of said'rotor, annular sealing ‘elements supported
passage extending through‘said transverse sur
in therespective recesses in sealing contact with
face at a point spaced from said axis, the other
said transverse surface of the head of: said stator,
member having a part opposed to said transverse
each sealing’ element-having anqannular- groove
surface and provided with an annular recess ex
connnunicatingwith; one of said ports and, a pas?
tending about said axis, an'annular sealing ele
sage_fconnecting ‘said groove, with said recess,
ment of substantially rigid material supported
means for connecting said recesses with a source
in said recess for sealing contact with said trans
of-?uid underpressuresand'means for preventing
verse surface, said sealing element having an an 45 the‘ passage of‘?uidibe-tween the walls of» said re
nular groove communicating with said passage,
cesses andsaid sealing element.
' >3 ‘ and an opening connecting said groove with said
i 17. Ina rotary seaha stator having at oneend
recess, said sealing element also having inclined
thereof a head, of enlarged diameter.v provided
lateral surfaces in said recess, and sealing rings
with atransverse surfacexhaving a‘plui‘alityz of
of yieldable materialarranged in said recess to 50 ports spaced apart radially and» circumferentially,
engage the respective inclined surfaces of said
saidstator also having a plurality of longitudinal
sealing element and-the adjacentwalls of said
passages-and lateral passages in said head con
rccess,-sa-id other memberhaving'means whereby
?uid under pressure may beintroduced into said
recess.
~ I
a
,i ,14. In a rotary seal, a rotor, a stator extending
into said ‘rotor, said stator and said rotor having
opposed surfaces transverse to the axis of said
rotor, said stator having a port in said transverse
surface thereof and‘ a longitudinal passage com
municating with said port, said rotor having in
said transverse surface thereof an annular recess
concentric with the axis thereof, an annular
sealing element in said recess having sealing con
necting ‘said’ longitudinal passages with there
spective ports; a rotor supportediabout said head
55 and'having a part substantially parallel'with and
adjacent to the transverse surface of ‘said head,
said “part of said rotor having a pluralityiof .ra
dially- spaced ‘annular recesses concentric with
thei'axis of said'rotor, annular sealingelements
supported in‘ the.‘ respectivelrecesses in vsealing
contact with said transverse surface of the head
of said stator, each sealing element having an
annular groove communicating with one of said
ports and a passage connecting said groove with
tact with the transverse surface of said stator 65 said recess, means for connecting said recesses
and having in the sealing face thereof an annular
with a source of ?uid under pressure, and a
groove in constant communication with the port
pair of sealing rings arranged in each recess to
in said transverse surface of said stator and with.
be pressed against the lateral surfaces of ‘the
said recess, said rotor having a passage communi~
sealing element therein and the adjacent walls
eating with said recess on the outer side of said 70 of said recess by the pressure of said ?uid.
sealing element and adapted to be connected with ‘
18. A rotary seal comprising a rotatable hous
a source of supply of ?uid under pressure, the
ing having an end wall and a circumferential
adjacent lateral surfaces of said recess and said
wall, a stationary member extending into said
sealing element having outwardly diverging por
housing and having at its inner end a transverse
tions, and sealing rings arranged to be pressed 75 surface opposed to the end wall of said housing
2,404,494
1
-.
ll
12
said recess, means for'preventing the passage of
priovidedwith a plurality of ports spaced
?uid between said sealing element and the side
apart ‘radially-and circumferentially ‘and ‘also
walls of said recess, said rotatable member'hav
having a plurality of longitudinal passages con- ,
ing means whereby said recess may be connected
with a source of fluid supply, said sealing element
nected with the respective ports, said'endwall of
‘said housing having'a plurality of recesses ex
having an opening ‘therein, and a stud carried by
vsaid stationary member'and extending into said
tending about the axis of said housing‘and fac
ing said transverse surface of said stationary
opening to cause ‘said sealing element to rotate
with said rotatable member while permitting it
membenannularsealing elements supported in
the respective recesses in contact with said trans
to move in the direction of its axis.
21. Ina rotaryseal, a‘ ‘rotatable member, a
verse surface of said stationary member, each
"sealing element having an annular groove con
centric with said axis and in constant communi
stationary member connected with said rotatable
member, having a sealing surface adjacent said
rotatable member and having a plurality of pas
inwhich said sealing element is supported'said
housing having means for connecting each re 15 sages extending through said sealing surface, said
stationary member having a plurality of annular
.ccss with a source of ?uid supply, and a bearing
recesses arranged about the- axis ‘of said rotat
interposed between said rotatable‘member and
able. member and facing the sealing surface of
the circumferential wall of said housing. >
cation with‘one of said ports and with the recess
19. A rotary seal comprisinga circular hous
and rigidly connected ,onevwith the other, said
ing having upper and lowerwalls spaced apart
said stationary'member, said rotatable member
20
sealing element supported in eachof said recesses
‘lower wall having __an axial opening, a member
having a head arranged between said walls of
said ‘housing adjacent said upper wall, said mem
ber also having a small diameter portion‘ extend
also having means for c‘onnectingsaid recesses
with a source of ?uid supplygand an annular
in contact with said sealing surface’ and having 7
an annular channel in constant communication
25 with ‘said recess and with one of ‘said passages in
said stationary member, said’rotatable‘member.
having formed ‘therein a lubricant receptacle and
openings extending between adjacent recesses to
ing through said opening in’ said lower wall,‘ a
bearing interposed between said small diameter
‘portion andsaid lower wall-to rotatably connect
conduct ?uid from said receptacle to said sealing
surface.
, ‘said housingw'ith said member, said member
having a plurality of ports in that surface of
said head that is adjacent said upper wallof’said
22. A rotary seal comprising two members one '
of which is rotatable with relation to the other,
one of said members havingasealin'g surface
‘the respective ports, said end wall having a plu
adjacent the other member and having a passage
- rality of recesses extending about the axis of
‘said housing and facing said head, sealing ele 35 extending through said sealing surface at a point
housing andlongitudinal passages connected with
spaced from the axis of said rotatable member, '
men?s. Supported, in the respective recesses. in
an annular sealing’ element connected with one
of said members, engaging said sealing surface
contact ‘with, said head, each sealing element
;having an annular groove concentric with the
axis of said housing and in_ constant communi
cation with one of said ports and with the re
and having ‘an annular channel in constant com
40 munication with said passage; and means for con
necting said channel with a source of fluid sup
lc'ess in which, the said sealing element is sup
‘ply and for'subjecting said sealing, element to
ported, said housing having means for connect
ing each recess with a source ‘of ?uid supply. 7' e
pressure'to maintain the same in firm contact
with said sealing‘ surface.
_ 2Q. Ina rotary seal, a stationary memberand
ing opposed surfaces, one of said members being
tending" throughw'said transverse surface at a
‘her/having a part opposed to said transverse
'
rotatable with relation to the other member, one
of said members having an annular recess ar
‘ rotatable ‘member and also having a passage ex
' vpoint spaced from'said axis, said rotatable meme
"
23. ‘A rotary seal comprising two‘ members hav
1a rotatable member, said; stationary member
having a surface transverse to the axis‘df?the'
ranged about the axis of the rotatable member
50 and also having means for connec‘ting'sa'id recess
‘surface and‘prdv'ided with a recess extending
‘ about" and ‘spaced from the aims thereof, an an
, nular sealing‘element supported in said recess
‘ for movement in the direction of its axis into
with a source of fluid supply, an annular sealing
element supported in said ‘recess with one surface
‘thereof in sealing contact with the surface of the
other member, one of said surfaces having there- '
sealing" engagement with said transverse surface 65 in an annular groove, said other member having
‘ ofsaid ‘stationary member, saidsealing element
‘ having between the lateral edges of that surface -
j thereof which vis adjacent said stationary member
a'passage- in constant communication with said
groove, and means for connecting said groove
I with said recess and said source of fluid supply.
1 an annular groove concentric with the axis of
said rotatable member and communicating with
' the passage in's'aid stationary member and with
EDWIN G. HALBY.
ROBERT J. BUSHONG.
7
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