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Патент USA US2404900

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July 30, 1946.
B. G. CARLSON
-
2,404,900
HYDRAULIC SPEED CONTROL GOVERNOR
Filed April 28, 1945
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INVENTOR.
BERT G. CARLSON
BY
ATTORNEY
July 30, 1946.
I
2,404,900
B. G. CARLSON
HYDRAULIC SPEED CONTROL GOVERNOR
Filed April 26, 1945
‘
2 Sheets-Sheet 2
INVENTOR.
BERT G. CARLsolv
A TTORNE Y
Patented July 30, 1946
2,404,900
UNITED STATES PATENT OFFICE
2,404,900
HYDRAULIC SPEED CONTROL
GOVERNOR
Bert G. Carlson, Gates Mills, Ohio, assignor, by
mesne assignments, to Jack & Heintz Precision
Industries, Inc., Cleveland, Ohio, a corporation
of Delaware
Application April 26, 1945, Serial No. 590,408
5 Claims.
(01. 264-19)
1
2
This invention relates in general to speed con
trol governors and more particularly to improve
ments in hydraulic speed control governors and
has for one of its primary objects to provide a
simple and e?'icient self-contained unit which
will maintain a constant speed of the prime mover
by automatically adjusting the same and elimi
impeller is a soft material oil seal I3 between
two oil seal washers I4 and I5 below which is
provided a retaining ring I6.
The impeller itself is formed to have a semi
circular cavity I'l divided into a plurality of
cavities by spaced vanes I8 therein and to which
latter is secured a continuous circular ?at ring
nate vibrations by effectively dampening vibra~
I9 intermediate the inner and outer extremities
tions due to sudden load changes without involv
of the vanes. As stated before, the load of the
ing a loss of energy due to heat or equilibrium 10 rotation of the impeller is borne by the ball bear
speed of the governor.
ing assemblies including the balls 4 and the races
Another paramount object is to provide an
5 and 6.
hydraulic speed control governor which by its
Opposed to and spaced longitudinally of the
construction including a rotating impeller driven
impeller is a shell 20 that is engaged by a screw
by the prime mover and a spaced and opposed ' bolt ZI to secure the shell to a reciprocating guide
spring loaded and dampened non-rotative axial
shaft 22 slidably mounted in bushing 23 that is
ly reciprocable shell provides for the virtual elimi
rotatably mounted in housing cap 2. Bushing
nation of friction and efficiency losses resulting
23 is externally screw threaded to receive a nut
therefrom.
24 between which and the shell 20 is disposed a
A further object is to provide such a. governor 20 compression coil spring 25 that surrounds the
that will provide for the heat exchange be
bushing and the slidable shaft. The nut 24 has
tween the disturbed hydraulic ?uid and static
a slot to receive a guide pin 26 that is carried
cooling hydraulic fluid.
by the housing cap. Secured rigidly to bush
With the foregoing and other objects in view,
ing 23 is a, speed adjustment dial 2'! the turn
the invention resides in the new and novel proc
ing of which in either direction causes the nut 24,
ess and resulting construction hereinafter set
which is restricted against rotation by guide pin
forth in the following speci?cation and appended
26, to ride up or down on the bushing and thus
claims, certain embodiments thereof being illus
decrease or increase the compression of coil spring
trated in the accompanying drawings, in which:
25 accordingly.
Figure 1 is a view in longitudinal section taken
The shell 20 is formed to have a cavity 28
through the hydraulic speed control governor
opposed to cavities I‘! of the impeller, the outer
extremity of the shell having a depending circu
lar ?ange 29 extending with clearance into an
annular chamber 30 in the housing that extends
below the head of the impeller. Surrounding
units;
Figure 2 is a view in section taken along line
2—2 of Figure 1;
Figure 3 is a view in section taken along line ‘
3—-3 of Figure 1; showing the rotating impeller
in top plan view; and
Figure 4 is a view in section taken along line
4-4 of Figure 1, showing the reciprocable shell
in bottom plan view.
Referring more particularly to the drawings,
the unit includes a housing I with a detachable
cap 2. The impeller 3 is rotatably mounted in
housing 2 by a ball bearing assembly including
ball bearings 4 and inner and outer races 5 and
B. Impeller 3 may be provided with a remov
able drive shaft ‘I, of square or angular cross sec
tlon, and having a bevelled groove head 8 to
receive a snap ring retainer 9 which engages the
head to retain the latter in driving engagement ‘
with the impeller. Above the drive shaft is an
oil seal disc I0 and below the ball bearing as
sembly and against the inner surface of the hous
ing is a soft material oil seal II and an oil seal
washer I2 therefor. Below this and about the
shaft 22 and bushing 23 is a longitudinally ex
pansible bellows 3| of the type known in the
trade as a “Sylphon.” This “Sylphon” is secured
to the housing cap by pins 32 and to the shell 20
by pins 33. The shell 20 is provided with a cir
cular series of spaced apertures 34 in its dished
portion and a circular series of spaced apertures
35 in its central ?at portion.
The chamber provided by the housing and its
cap may be ?lled with oil or other hydraulic fluid
to a level appreciably higher than that of shell
20 so as to ?ll chamber 36 and part of the interior,
as well as exterior, of bellows 3|. The resistance
which the fluid in cavities I ‘l of the rotating im
peller offers to the rotating vanes I8 thereof as
‘the vanes take the ?uid along with a fraction of
their angular velocity creates a force which is
transferred to and resisted by shell 2i as it is
reciprocated against the action of coil spring 25
whose compression is adjustable by speed dial 21.
2,404,900
13
4
merged in said ?uid and having a concave sur
The action of the impeller with its vanes l8 and
?at band is in the ?uid in which it is submerged
face disposed to be opposed to that of said im
peller and carried by a shaft reciprocably mount
ed in said housing, said shell being adapted to
pling. The construction of the shell 28 with its
resist by reciprocation the hydraulic forces set
opposed cavity 23 and overhanging ?ange 29 is
up by the ?uid disturbed by the rotation of said
such as to receive the hydraulic fluid disturbed
impeller, spring and stop means for normally
and de?ected by the impeller in such a manner
maintaining said shell and impeller in a predeter
as to enable the shell to remain centrally bal
mined spaced relationship, said shell being adapt
anced in its reciprocation against the action of
spring 25 and in response to the hydraulic force 10 ed to resist by reciprocation against the action of
said spring the hydraulic forces set up by the
set up by the impeller. The hydraulic ?uid hav
?uid disturbed by the rotation of said impeller,
ing access to the interior and exterior of the bel
an expansible bellows secured to said housing
lows 3i renders the latter capable of effectively
and to said shell and partially submerged exterior
dampening the reciprocating movements of the
ly and interiorly in said ?uid and adapted to
shell and particularly the dampening of vibrations
dampen vibrations transmitted to said shell and
that would otherwise be present in case of sudden
housing by the rotation of said spaced impeller.
load changes. By means of the simple adjustment
3. An hydraulic speed control governor com
of speed adjustment disc ii a normal adjustment
prising
an housing to contain hydraulic ?uid, a
of the governor may be made for purposes of con
trolling the speed of the prime mover by increas 20 prime mover driven rotating impeller submerged
in said ?uid and being of bowl formation to pro
ing the compression of spring 25 to lessen the top
vide a cavity divided by spaced vanes and a ?at
speed and by decreasing such compression to in
circular ring secured to said vanes intermediate
crease the top speed. Besides the greater hy
their inner and outer extremities, a shell sub
draulic force exerted vertically upwardly from
merged in said ?uid and having a concave sur
the cavities of the impeller a centrifugal force
face disposed to be opposed to that of said im
is also exerted at an angle approximately equal
peller and carried by a shaft reciprocably mount
to that of the inclination of the angular inner
ed in said housing, said shell being adapted to
surface
of shell 25}. This surface 36 deflects
resist by reciprocation the hydraulic forces set
the oil inwardly where it drops down into cavi
up by the ?uid disturbed by the rotation of said
ties ll of the impeller. The apertures 31% act as
impeller, spring and stop means for normally
breathers and as a means for eliminating air bub
maintaining said shell and impeller in a prede
bles when the unit is ?lled with hydraulic ?uid.
termined shaced relationship, said shell being
It will be appreciated that the main disturbance
adapted to resist by reciprocation against the
of oil occurs in the impeller and that the area of
is the same as that of the impeller of a ?uid cou
such disturbance is restricted to the chamber ,
action of said spring the hydraulic forces set up
formed by the opposed faces of the impeller and
by the ?uid disturbed by the rotation of said im
peller and means for adjusting the resisting force
of said spring for adjusting the speed limits of
said governor, an expansible bellows secured to
shell. Hence the remainder of oil in the unit
above the shell is static and acts effectively as a
cooling medium by ready heat exchange between
the static oil and the disturbed oil. Positive pro
vision is made for this heat exchange feature
in that the hydraulic ?uid in the chamber formed
by the opposed faces of the impeller and shell is
' said housing and to said shell and partially sub
merged exteriorly and interiorly in said ?uid and
adapted to dampen vibrations transmitted to said
shell and housing by the rotation of said spaced
impeller.
forced upwardly through the breather holes 34
to circulate with the static cooling ?uid above the
shell where it may then be forced downwardly
in chamber 86 around the shell ?ange 29 and
back into the cavities ll of the impeller.
I claim:
1. An hydraulic speed control governor com
.~,
4. An hydraulic speed control governor com
prising an housing to contain hydraulic ?uid, a
prime mover driven rotating impeller submerged
in said ?uid and being of bowl formation to pro
vide a cavity divided by spaced vanes and a ?at
circular ring secured to said vanes intermediate
their inner and outer extremities, a shell sub
prising an housing to contain hydraulic fluid, a
merged in said ?uid and having a concave sur
prime mover driven rotating impeller submerged
face disposed to be Opposed to that of said im
in said ?uid and being of bowl formation to pro
peller and carried by a shaft reciprocably mount
vide a cavity divided by spaced vanes and a ?at
circular ring secured to said vanes intermediate 7." ed in said housing, a bushing rotatably mounted
in said housing and adapted to slidably receive
their inner and outer extremities, a shell sub~
merged in said fluid and having a concave sur
face disposed to be opposed to that of said im
pelier and carried by a shaft reciprocably mount
ed in said housing, said shell being adapted to
resist by reciprocation the hydraulic forces set up
by the ?uid disturbed by the rotation of said im
peller, an expansible bellows secured to said hous
ing and to said shell and partially submerged
exterior-1y and interiorly in said ?uid and adapted
to dampen vibrations transmitted to said shell
and housing by the rotation of said spaced im
said shaft, said shell being adapted to resist by
reciprocation the hydraulic forces set up by the
?uid disturbed by the rotation of said impeller,
an expansible bellows secured to said housing
and to said shell and partially submerged ex
teriorly and interiorly in said ?uid and adapted to
dampen vibrations transmitted to said shell and
housing by the rotation of said spaced impeller.
5. An hydraulic speed control governor com
prime
prisingmover
an housing
driven to
rotating
‘containimpeller
hydraulic
submerged
?uid,
in said ?uid and being of bowl formation to pro
vide a cavity divided by spaced vanes and a ?at
in said ?uid and being of bowl formation to pro~
vide a cavity divided by spaced vanes and a ?at
circular ring secured to said vanes intermediate
their inner and outer extremities, a shell sub
merged in said ?uid and having a concave sur
face disposed to be opposed to that of said im
circular ring secured to said vanes intermediate
their inner and outer extremities, a shell sub~
peller and carried by a shaft reciprocably mount
ed in said housing, a bushing rotatably mounted
peller.
2. An hydraulic speed control governor com
prising an housing to contain hydraulic ?uid, a
prime mover driven rotating impeller submerged
2,404,900
in said housing and adapted to siidably receive
pression coil spring surrounding said shaft and
said shaft, said shell being adapted to resist by
reciprocation the hydraulic forces Set up by the
?uid disturbed by the rotation of said impeller,
an expansible bellows Secured tQ Said housing and _»,
held between said nut and said shell and manual
means on said bushing for turning the latter to
operate said follower nut to adjust the compres
sion of said spring and the consequent resistance
to said shell and partially Submerged exteriorly
of said shell to reciprocation under the hydraulic
and interiorly in said fluid and adapted to dampen
vibrations transmitted to said shell and housing
by the rotation of said spaced impeller, said bush_
influence of the ?uid disturbed by the rotation
of said impeller,
BERT G. CARLSON.
ing carrying a non-rotative follower nut, a com- 10
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