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Патент USA US2411602

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Nov. 26, 1946.
R. L. TWEEDALE
2,41 1,602
PUMP FOR POWER TRANSMISSION
Filed Sept. 3, 1942
48
INVENTOR
‘ Patented
26,,
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.to Vickers,Incorporated,‘lletroitrlilichi,a‘cor-w
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fébwleniiét Mlchlmiy “
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This inventiongrelates tospolwer
- 2
mommy secured to 1th
Q
, particularly; to those 01' the type comprising two ~. _,shown,;; The ‘body "is provided vwith an arcuate '
5 or more ?uid pressure,energy-translating de
A suctionpqrt-gl! communicating with a'suction '
,
' vices, one 01 ‘which; may function asapump'and
‘pipe connection‘ ll-andradiallyinward thereof
‘
‘6 ‘is proyidedvwith asmaller ,arcuate pressurev port
The inventionis ‘more particu1arly..;concemed .‘ Y '22 communicating with a pressure'zipipeiconnec
with
control
a pumpingfunitof»
.means for regulating
the rotarytype;
the volumetric
and with
dis-f
t1°n¥2‘.'
V;
Journalled'.
ichargethereof.
-
~
I
I‘
Y‘
»
'
bearingtyilll inthe "housing '
1' Ill isa drive shaft}! which at itsinne'r end has
" ' ‘A form of pumping: common use .Yinnthe thy
a splined connectionjjlxwithvla cylindrical rotor
v d‘raulicv power transmission ?eld utilizes‘laj rotor _‘ Nublock _;z_ .inthe cartridge 147.;v The‘ block 32,18
'?, provided with a'Dlurality of-generally radial-slots
having ‘ a‘lplurality _ of: substantially radial'p'vanes ,_
rotatable therewith and slidahlerelative thereto.v - '1 in which are ‘positionedwvanes-?, as seen: inli‘lg-v
,The' rotor andvanes cooperatelwith;aistator J ' ~ure'j4, the vanes being radially movable inwardly
member iwhichide?nes one .or ‘more "pumping 15 and outwardlyvwithin the slots“ '
_ ' chambers‘thvroughwhichlthe Ivanes; pass carry-
'
‘f ing liiuid ‘from the inlet port to the, out1et;~port. ; ‘
' the ends of thevanejsf 3.‘ contact. .. Therotor' 32
.,,i'Pumps
' itto
the
provided
?uid
thepumpsuction.inlet-through
ofwith
delivered
"thischara‘cter
pressure
by relief
the have
pumpiandgreturning
valves
heretofore
(for bypassing
a ,‘bypass
been
5 provided ‘with hollowwjvhubs llfwhich ‘run in
j‘l’beari'n'g’s 4p, pformingilpartiof YthecartridgelL
"passageway, either‘ for limiting the: maximum
‘
'
, ‘Thefcartr'idgey l4 includesia irimgjmémsa 'u;
‘having’ a' cylindrical, externalgshape and anj'ap
“proximately oval internal'shape ~against which
‘
' . The bearings 40' have integrala?ange portions 42 pressurein' theipumpvndischargefline or ,for com- 7 ‘
pletel'y' unloading. the pump ‘tor-permit it‘tecirr,
“the; ring ‘ 3V6,‘ ‘ 1 The ' righthand ' ?ange .42 is provided
"ii'whichhoverlie the, side'ifa'ces or‘. the rotor; :77: ‘and
‘culate, iluid "idly. I
V’Withi ?l‘cliite' suctlqnjpéi‘t’sflil "and arcuatev‘dis-jv ' '
> _‘ ‘_ j'It isifan' object: 1 f; thief-present invention ‘t6: pro-1
‘vide anirnprovedfpumping ‘unit which may -_be so
harge ports 48; whichjappea'r inFigures 3.;and'5.
The vports '44 ' communicate'fby inclined. passages .
' controlledia‘s,.,to.acta_s its?cwnrrelief valve orun- ' ' ;,l8""w'ith‘ :"the suction passageway ,l'l, while,the .
j . [A in 'hepobject is toaprovide a=unit of this
31)
“ports: 16 communicate by "an inc1ine'dQpass‘agex'50
with the QECMWQPQSWeWeY 11-‘ a
“5 The‘ l?ang'e'sullyyare ‘provided with‘gro-vesi 52 '
"‘ v ‘ vanes
character
. relative
_’ wherein.
to ‘the,the‘
rotor
radial
may
vmovement
be variably»
‘clothe
con- ‘
wh’ichiextend vv360 degrees .aroundhtheir inner
trolled ,toqthereby regulate the‘pumping :action
and reduce 'or increase, .to any degree desired,- the
. faces"at;4a3pointx adjacent the‘ inner end of, the
slots in'the rotor. Thegrooves 52' thus provide
35 access connection to the space inthe slots be
.g Further 1 objects .Y and (‘advantages 40in thev pres
1” neatlfthe wines“; The 'righthand groove 51 _ ‘
' ing__
entwinventlion’
description;i'zreferencei
willlbe apparentfromthe
being had. togthe
i'ollow"ac-“1> connects with. the discharge passage 22' by means
' of a"restricted‘passagéiliin'Figurejl.‘ The left:
companying drawin’glnwhereinf av preferred iiorm; I a
‘ of theipres'ent invention is. :clearly‘shown. 1
v "
.' Inithe ‘drawing;
"
" a‘
ihand‘g‘ro‘ovevj? i'c‘o'nnects by meansjor a passage- ,
40?*way 56 "Witlr-a pipe cionnequnnfsa and'with a
‘v .~ 5' i' pilot relief valve 60f‘ The later is spring-‘loaded
,- . a in
at‘ a? predetermined; pressure? in the pas
- pumpincorpc'rating
Figure‘. J1‘ isJa‘longitudinal'crossllsectionv
apareferred form of the pres
,i a" , =1: 'toflorpexY
sage'yi?which pressureémaylbeadjustea through I
entinventiomj
‘v
,
H
v
‘the cmediunii ‘or - ‘a 'spring-adjustin‘g'iscrew 02 have‘
_ "Figure 2 is a cross sectionjon-line 2-_-2 oil-Fig 45 vin'g'a'loclrfn'ut"'64.v Whénthe vaive'i‘l is open;
?uidJpassing‘FtherethrOughis] ‘carried to the suc
tion passage 18' throughafduct ‘616 iormed in the I.
ure 1;
" t
,
Figure 44s a crossisectionon lineiHv‘oi'vli‘lg-m
_ ’ Figure '5 is,afcrossisectiononline
i- v
With ‘the lex'ceptionl'of thejrest’ricte‘d passage ' "
54 and the‘parts which leado‘ff from the passage
:Eig? J; i 55,: .theif'pump’may ‘be constructed-similarly to
a
gthatillustrated ‘in, the patent; to "Harry FJVickers,
body [0 is provldedniwith a cylindrical recess ’ '1-‘~i1No;,-'1;989;900;1to:which'reiierence i's’vmade vvfor dis
closureof ‘certain'F‘detail “features omitted" from
' ‘Bl-2V
being
in ‘which
retained
a is‘ therein
f?ttevd. ratpuinpiri/g,
byma'vhead ‘cartridget;
plate
re-'
i4,
thepresent drawing for the sake of clarity.
ure 3;.“
f
_>
.
in
‘a
3
2,411,002
In operation, assuming that the inlet connec—
sary to overcome the centrifugal force tending to
push the vanes outwardly.
tion 20 is connected witha suitable reservoir of
oil or other liquid, and that the outlet connec
In addition, it may be desired to vary the quan
tion 24 is in communication with a suitable work
tity of ?uid delivered by the pump, without com
circuit, with the shaft 28 being driven, the rotor ; pletely unloading it. In suchycase, the plug may
32 revolves counterclockwise in Figure 4, carrying
be loosened to permit leakage or the on-off valve
with it the vanes 34.
At pressures below the set
may be so constructed or operated (e. g., a nee
ting of the pilot relief valve 60, the operation of
dle valve)v as to variably restrict the exhaust
‘from groove ‘52. By- loosening the plug or open
previously mentioned Vickers patent, and oil is 10 ingthisvalVe to a ‘greater or less'extent, its re
sistance may be varied relative to the resistance
carried from the suction ports to the ‘discharge
“01' restriction‘ 54, and consequently the pressure
ports, the vanes, 34 sealing the space between
therotor 32 and ring 36 at'the diametrically ope ; , beneath the "vanes may be regulated to become
any desired percentage of the discharge pressure,
posite top and bottom points in Figure 3.
and, the degree ‘of slippage of the pump is cor
It will be noted that‘theliquid in the grooves ,
respondingly varied.
52 is under the full pressure oifwthev pump dis"
the pump is ‘I identical to that described in the‘
charge since there is no ?ow through the re
stricted ori?ce 54 and consequently nopressure
drop therethrough. This is because there is
always the same number of vanes moving in
wardly as there are moving outwardly at any in
» While the form of embodiment of the inven
, ~_tion as herein disclosed constitutes a preferred
form, it is to be understood that other forms
20 might be adopted, all coming within the scope of
the claims which follow.
What is claimed is as follows:
- 1'. A'rotary vane'type pump having a pump
52 and the slots connected thereto remains con
‘stator having a ‘?uid working chamber having
stant. ,Thus, the vanes 34 are projected out
wardly as they pass across the suction ports 44 25'inlet and outlet 'ports,'a roto‘r'membe'r mounted
in the fluid working chamber, one of said mem
in‘Figure 4. This is the normal pumping action _
bers having recesses therein, alternately retract
oithe device.
.stant and the total volume of ?uid in the groove ' '
When the delivery pressure against which the '
' able and extendable vanes‘ mounted in said re
cesses for vsealing the‘ passage of?uid between
pump discharges‘- rises to-a value higher than
that for which'valve 60 is adjusted, the valve 30 the pump outlet‘ and inlet, means 'forming a
pressure chamber communicating with the re
opens, permitting liquid 'to escape from the
I cesses, the pressure in which is effective to urge
groove 52‘through passage 56, valve 60, and pas
- sage'66.
‘the vanes outwardly, a permanently open, re
This causes a flow to take v‘place
stricted ‘passage connecting the pressure cham
through the restriction 54, and, as the ?ow rate
increases, the pressure drop through the restric 35 her with the pump outlet,_and a pressure respon
tion 54 increases, and there is accordingly less r‘sive relief valve connected between the‘ cham
‘bers and an exhaust point responsive to and
pressure applied ,to the under surface of the
limiting the maximum pressure in the chamber
vanes 34. When ‘this tendency has progressed
:to vary the amount. of extension of the vanes
tween that applied to the outer end [of ‘a given 40 when a predetermined pressure is‘ reached at
the‘ pump outlet to thereby vary the amount of
vane as it approaches one of the pressure ports
to the point where the'di?'erence in pressure'be
45 and the pressure applied to the innerv end of ‘ _ slippage .past the vanes in a ‘manner to main
‘ tain pump ‘outlet pressure 'constant.
:
the same vane is ajgreater diiference than the
2. A single,-- self-contained,
centrifugal force applied to thatfparticular vane,
self-regulating
pump unit comprising a single pump of the ro
*"then the vane will be forced slightly inwardly,
permitting oil to escape between the outer, face
tary, multiple-vane type,'a pump statofr'having
a‘?uid' working chamber’ having ‘inlet and out
of the vane and the inner ,face of the ring 36.
‘ In this way, high pressure oil frornrthe discharge ' let ports, a rotor member'ymountediini the ?uid
port 46 may ?ow back past the end of‘ the vanes 5 O~working‘ chamber,v one 01’, said members having
recesses therein, vanes mounted in said recesses
34 to the suction port 44. ' Thus, the net delivery
for inward and outwardemovem'ent, ?uid pres
of the pump isureduced, and consequentlytends ‘
to reduce the pressure in the discharge, passage
- sure means for causing movement of the vanes
outwardly during a phase of pump ‘rotation, a
22 until it eventually falls to a value where the
valve lio‘againlcloses, and normal ‘action is re
'
stored.
pressure-responsive relief ‘valve of small capacity
55 with respect to the pump“ capacity, ‘means for
causing said relief valve ‘to govern the outward
In applications where it is never necessary; to
movement of the pump vanesywhereby the slip
completely unload the pump, the,;pipe connec
page of the pump“ may be purposely increased to
tion 58 may be plugged with a suitable pipe plug,
maintain pump discharge pressure within a pre
j and the device then provides merely overload go’determined limit, and additional means govern
pressure-limit‘. protection.. In the event, how-..,
ingmovement ‘of the pump vanes by cooperation
' ever, that it is desired to interrupt the delivery of .
with said ?rst means and effective to unload the
?uid by the pump without stopping the rotation v "
of shaft 28, the connection 58 maybe used as a
pump independentlyjof, said" relief valve.
‘3.'A "single self-contained, self-regulating
_ “vent” connectlonto unload the pump at will.v 65 pump unit comprising asingle pump of the ro
Thus, theduct 56 may be opened by‘ removing
tary vane type, a pump stator having a ?uid
the plug in connection-58 or it may be connected
to a remotely operable on-o? valve which, when
it is opened, will connect the duct 56 to an-ex
haust point, ‘such as the oil reservoir, and in 70
stantly drop the pressure beneath‘, the vanes to a ‘
very'low value. 'Accordingly, the vanes will 1be
working chamber- having inlet and outlet ports, a
rotor member ‘mounted in‘ the ?uid working
chamber, one.of said members having recesses
therein, vanes mounted in said recesses‘ for in
ward and outward movement, a pressure cham
ber 'in permanently open‘ but restricted com
pushed inwardly as they approach ‘the. pressm‘e
munication with the ‘discharge side of the pump
port, and this acti'on'will continue until the dis
and e?ective ‘to maintain the vanes fully pro
charge pressure has fallen to avaluejust neces 75 jected into pumping position ‘wherein'slippage is
9,411,002 '
a minimum, and means e?ective to vent said" '‘ being pumped, said ports being spaced apart and v
chamber and prevent fullproiection of thevanes - separatedbysaid vanes in" passing through said
whereby pump slippage may be increased ‘to sub 7 I vworking space, and means selectively operable to
vary the movement of the vanes relative, to the
'stantially W100vper cent.
v
_,
v
rotor andthereby connect the inlet and outlet
4. A rotary pump comprisng in ‘combina
ports, said means including a permanently-open,
tion a stator having a pumping chamber therein,
[a rotor in saidchamber and having a plurality -‘
oi.’ recesses and vanes rotatable therewith- and .
movable relative to the‘ rotor in a generally radial
restricted connection between the outlet port I
‘and said recesses and a normally-closed passage '
leading to an exhaust point and means-‘to; open
direction in'said recesses, said chamber and'rotor 10 ‘said passage for at times exhausting said re
being formed to provide a working space, means
forming an inlet port and an outlet port for ?uid
cesses.
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