close

Вход

Забыли?

вход по аккаунту

?

код для вставки
[email protected] 19, 1947.
RT F. oNsF’éUD
RoTóR GQvERNoR
yFiled Aug. 25, 1945
I
2,426,045 v
2 Sheets-Sheet l
Aug', 19, 1947.Y
R. F. oNsRuD
I
2,426,045
ROTOR GOVERNOR
Filed Aug. 25, 1945
2 Sheets-Sheet 2
.ìáfóï
@j
'
.1
il
I/
`26 /0/ _I
27
2.5
fav
i
/ß
i
1
--
E 'l ’_
il ,
/l/
Il
s
.
f
‘e
_,
*f4
:
_
-
'
-
y
.
. \ f g
24% l..
\
'
â@
\
\
6
\
./
214¢=U ¿L9 4
023
f
f
-
_4.
f7
/a
i
// .
f6 '
'
/
b?Ír/Weys
f
2,426,045
Patented Aug. 19, i947
UNi'rED STATES PATENT `oif?rlczr.
RÜTGR GOVERNOR
Rudolph F. Onsrud, Chicago, Ill., assign'or to
Onsrud Machine Works, Inc., Chicago, Ill., a
corporation of Illinois
Application August 25, 1945-, Serial No. 612,572
6 Claims. (Cl. 253-52)
2
.
Fig. 4 is a sectional detail taken on- thel-li‘ne
In fluid-driven motors, principally of turbine
type and especially where high speeds are con
li-ê of Fig. 2‘.
In the form'shownin the drawings, the turbine
cerned, there is no known means of automatically
adjusting the ñuid input to fluctuating loads.
Wheel or rotor I is fastv on a spindle 2‘-‘ca»i‘ried
The use of fly weights, springs, etc., on a rotating
member for governing the speed thereof is im
practical for high speeds because of the con
nections that must be made with a stationary
by ball Vbearings 3" and- has formed iïrí` its rim
portion ¿l the usual annular series of bucke't‘b‘lades
5. The periphery 6 is of ’smoothvcylindrical form
and the rotor is made of suitable material; 'such
as an aluminum alloy whereby', whenî driven-at
part. Such connection is subject to exceptional
frictional heat resulting in a rapid wearing away 10 the high speeds of such turbine rotors, it's’perifph'
ery would have a perceptible a-mountvofeiipan'?
of the materials and thereby spoiling the adjust
sion Whichrv'aries with the speed of rotation ofthe
ment. Because of the high speed of a turbine
rotor.
rotor-say for example, five miles per minute
The housing l has a iluid dischargeî‘n'ozzle‘ 8
any rotating ñexible device for governing speeds
becomes rigid and inilexible inthe speed range 15 positionedY so as to direct a jet of" iluid against
the buckets 5 for drivingv the; rotor. 'I-'he‘ housing
in which the automatic adjustment is necessary.
also `has an appropriate exhaust outlet 9"-at the"
The device of the present disclosure makes use
opposite side of the bucketsä.
of the fact that a high speed rotating wheel is
Fluidy under pressure, in this vcase yair', is’` supe'
expanded radially to some degree by centrifugal
plied to the >nozzle 8f by a pipe’llll» which- is conI
force proportionately to its speed of rotation and
nected to. the inlet duct lïû and has- lthe usual
utilizes this expansion to control a throttle valve
stop valve (not shown) for admitting andE cutting
in the power medium supply for governing such
off the supply of fluid to the nozzle 81
speed.
The governing'- device comprises aï‘hous'in'g' ll
The main objects, therefore, of the present in
vention are to provide an improved form of gover
nor for high speed rotation; to provide improved
means senitive to the centrifugal expansion of
the rotating part for controlling a ñuid-driven
mechanism; to provide an improved form of
centrifugally actuated governor for controlling
the fluid delivery nozzle of a turbine; and to
provide improved throttle-valve actuating mech
25
formedY integrally with the rotor Vhousing» and*y
havingv a cylindrical bore or chamber flf2`*ir1'` axial
alinement with the nozzle 8. The outletv p‘as~'~
sage LS leading frrom the chamberV l2" tothe
nozzle 8- is.y tapered and has `r'n'ounted therein a
needle valve h3» which is controlled and »guided
in its movements byany actuator l5" which is slid--A
ably mounted'v in the chamber l2 to control; the
discharge at said nozzle.
In the form shown, the actuator is inthe nature
anism for devices of this kind.
A further object is to provide an improved
mechanism for controlling the power supply to 35 of a freely movable piston and- comprisesv a> stem
for the needle valve I4 of. less diameter than the
a Huid-pressure driven> machine, by means which
diameter of the chamber I2` so as to provide a
senses the location of a relatively moving surface
passage l5 for the free `flow- of‘fluid from the
without having physical Contact with such
surface.
end>
inlet of
passage
the actuator
l0 to the
'|15A outlet
adjacent
passage
the -out-le't
i3.
I23-A specific embodiment of the present invention 40
is
tapered
and
provided
with
spider»
arms>
-lï'lï
is illustrated in the accompanying drawings in
between which there are openings ~I8~ for »the
which:
passage- of fluid.
Figure 1 is a plan View of a speed governing
The opposite end of the actuator I5 has apiston>
device made in accordance with this invention
head` i9 and there is a by-passY duct »20" 'formed'
for controlling the speed of a vertical spindle
in orlat one side of the periphery of 'this pis-ton
driven by a horizontally disposed turbine wheel
to permit a» small amount ofr iluid to-iïrassl intousing air under pressure as the source of power.
the part of the chamber l2 which is beyond th‘e
Fig. 2 is a vertical sectiony of the same taken
end of` the piston 19. The actuator» isäsoßar
generally ony the line 2-2 of Fig. 1 but deviating
slightly from the plane of said line in order to 50 :rangedi that it is highly sensi-tive to ’theel-differ;
ence in Vpressures between` the two-sides of’ the
include in the view certain parts lying at one side
of that plane.
piston l?)V and is ofísuch-len’gth that >the'passage'
Fig. 3 is- a lvertical section taken at right~
angles to the plane of sectionvof Fig. 2 on the>
the inlet 16,.' reg-ardless‘ofï the position of?the
irregular line 3%' of Fig. 1.
l 6 will . at' all 'times-bei in: free.'communicationïwith
55 piston i9. ' The >ifa'ce- of -the' piston Awhichcarriesl
2,426,045
4
the needle valve I4 is of less effective area than
its other face so that the piston will close the
valve when both faces are exposed to the same
said wheel for control by the radial expansion
and contraction of said wheel, a throttle valve
controlling the fluid flow in said power supply
pressure.
A bleeder pipe 2l, of small diameter but of
passage, and means for adjusting said throttle
valve through changes in the relative pressures
greater area than the by-pass in the piston, is
connected into the chamber I2 adjacent the
in said iìuid-supply and bleeder passages.
2. A governor, comprising a wheel having a
cylinder head 22 and extends to a point Where
smooth periphery, fluid-driven means for rotat
the rim of the outlet 23 at its end is directly
ing said wheel at speeds that subject the wheel
opposed to the periphery 6 of the turbine wheel. 10 to centrifugal expansion, and fluid-pressure sup
A tapered pin 24 threaded at 25 into the housing
ply means comprising a power supply passage for
and having a knurled head 26 and lock nut 2'I
said fluid-driven means, a bleeder passage hav
provides for micrometrical adjustment of the
ing its outlet opposed to the periphery of said
space between the outlet end 23 of the bleeder
wheel for control by the radial expansion and
pipe 2| and the periphery B of the turbine rotor 15 contraction of said wheel, a needle throttle valve
I. To this same end, the pipe 2l should be of
controlling the fluid flow in said power supply
resilient material so that it normally bears out
passage, and means for adjusting said throttle
ward against the pin 24.
valve through changes in the relative pressures
in said huid-supply and bleeder passages.
The operation of the device shown is as fol
lows:
When the fluid inlet valve (not shown) is
opened and the fluid supply is admitted to the
inlet I0, the piston I9 will be forced backward
by the pressure of the fluid and the nozzle 8 will
be open for maximum flow of air to the turbine.
So long as the gap between the outlet 23 of the
tube 2l and the periphery of the rotor 6 is suf
ñciently large to allow the escape of air at this
point to the full capacity of the bleeder passage
20 in the piston I9, the piston will remain at the
backward limit of its stroke and as the speed
of the turbine wheel increases centrifugal ex
pansion of its periphery 6 tends to close the
gap at the outlet 23.
When this gap is such that its capacity is less
than that of the by-pass 20, then pressure will
build up behind the piston I9 in the chamber I2
and the piston will be forced forward causing the
valve I4 to partly or wholly cut olî the supply
of air at the nozzle 8. This movement of the
valve can be so balanced that a small fraction of
20
3. A governor, comprising a wheel having a
smooth periphery, fluid-driven means for rotat
ing said wheel at speeds that subject the wheel
to centrifugal expansion, and fluid-pressure sup
ply means comprising a fluid supply passage for
25 said fluid-driven means, a bleeder passage hav
ing its outlet opposed to the periphery of said
wheel for control by the radial expansion and
contraction of said wheel, a throttle valve con
trolling the fluid flow in said power supply pas
30 sage, and means for adjusting said throttle valve
comprising a balanced member actuated by
changes in the relative pressures in said fluid
supply and bleeder passages.
4. A governor, comprising a wheel having a
35 smooth periphery, fluid-driven means for rotat
ing said wheel at speeds that subject the wheel
to centrifugal expansion, and fluid-pressure sup
ply means comprising a power supply passage for
said iiuid-driven means, a bleeder passage hav
40 ing its outlet opposed to the periphery of said
wheel for control by the radial expansion and
.001 inch of variation in the gap will cause the
contraction of said wheel, a throttle valve control
plunger to move forward or back.
ling the fluid ñow in said power supply passage,
The micrometrical adjusting screw 24 regu
means for adjusting said throttle valve through
lates this gap and thus determines the maximum 45 changes in the relative pressures in said iluid
and minimum consumption of iluid relative to
speed range.
supply and bleeder passages, and micrometrical
adjustment means for setting said bleeder pipe
outlet toward and away from said wheel,
This governor also acts as a safety device to
partly or totally shut off air in the event of over
5. The combination with a turbine rotor hav
running. Overexpansion of the rotor would en 50
ing
a smooth periphery, and a nozzle for direct
tirely close the by-pass, force the needle valve
ing driving fluid to said rotor, of a governor
forward and choke the nozzle oriñce to the limit
comprising a throttle valve controlling said noz
provided for.
zle, a driving fluid supply chamber for said
In the form shown, Variation in the gap at the
outlet 23 is produced by radial expansion of the 55 nozzle, an actuator for said throttle valve mov
able in said chamber and normally urged to open
rim of the turbine rotor, but it is apparent that
said valve by fluid pressure in said chamber,
other elements of the machine, more or less re
means for by-passing iluid behind said actuator,
sponsive to centrifugal force, might provide the
and a bleeder duct for such by-passed fluid having
surface that controls the bleeder outlet, and that
the changes in such surface might arise from 60 its outlet opposed to the periphery of said rotor,
whereby the escape of iluid from said bleeder
other causes.
_
duct is controlled by the expansion and contrac
tion of said turbine rotor.
6. The combination with a turbine rotor hav
ing a smooth periphery, and a nozzle for direct
the structure shown may be altered or omitted 65
ing driving ñuid to said rotor, of a governor com
without departing from the spirit of the inven
prising a throttle valve controlling said nozzle,
tion as deñned by the following claims.
a driving ñuid supply chamber for said nozzle,
I claim:
an actuator for said throttle valve movable in
1. A governor, comprising a wheel having a
said chamber and normally urged to open said
smooth periphery, fluid-driven means for rotat 70
valve by fluid pressure in said chamber, means
ing said wheel at speeds that subject the wheel
for by-passing fluid behind said actuator, a
Although but one speciñc embodiment of this
invention has been herein shown and described,
it will be understood that numerous details of
to centrifugal expansion, and huid-pressure sup
bleeder duct for such by-passed fluid having its
outlet opposed to the periphery of said rotor,
whereby the escape of fluid from said bleeder
having its outlet opposed to the periphery of 76 duct is controlled by the expansion and contrac
ply means comprising a power supply passage
for said íiuid-driven means, a bleeder passage
2,426,045
6
5
tion of said turbine rotor, and means for ad
justing said bleeder outlet with respect to said
rotor.
RUDOLPH F» ONSRUDREFERENCES CITED
_
ì
_
The followmg references are of record 1n the
file of this patent:
Number
5
UNITED STATES PATENTS
Name
Date
1,312,253
1,460,746
Johnson __________ __ Aug. 5, 1919
Carlstedt __________ __ July 3, 1923
1,917,092
Bristol ____________ __ July 4, 1933
2 158 478
Parker ___________ __ May 16 1939
Документ
Категория
Без категории
Просмотров
0
Размер файла
442 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа