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Патент USA US3076450

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Feb. 5, 1963
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H. M. ARNOLD
FLUID COOLED DOUBLE ACTING PISTONS
'
FOR HIGH TEMPERATURE EN
0r1g1nal~Fi1ed May 5, 1950
GINES
3,076,440
2 Sheets-Sheet 1
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INVEN TOR.
WITNESS/¿W
7l. » _
y Feb. 5, 1963
H. M. ARNOLD
FLUID COOLED DOUBLE ACTING PISTONS
' 3,076,440
' FOR HIGH TEMPERATURE ENGINES
2 Sheets-Sheet 2
Original. Filed May 5, 1960
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BY
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United States
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Fatented Feb. 5., 1%3
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piston 12 and cylinder barrel 11 are exposed directly 'to
3,076,440
FLUID COOLED DOUBLE ACTING PISTONS FDR
Y
'HIGH TEMPERATURE ENGINES
« l >'Henry M. Arnold, 222 S. 5th St., Douglas, Wyo.
Original application May` 5, 1960, Ser. No. 27,020. Di
vided and this application Nov. 7, 1961, Ser. No.
152,126
'
v
4 Claims. (Cl. 121-1)
the circulating agent. ._
' A pocket 20 may be provided in the side of the piston
12 so a rod or bar can beinserted at one of the openings
at 2_2 to hold the piston 12 from rotating out of proper
position while assembling the engine mechanism.
FIG. 2 is an exact cross-section of FIG. 1 and shows
the cylinder 11, piston 12 and piston rod 13.
In FIG. 3, which is amore complicated construction of
`This invention relates to double acting piston engines 10 FIG. l, is shown as at the section line 3_3 of FIG. 5.
utilizing highly heated gases and, or, highly superheated
Here is ’shown one of the channelsaround the piston 12
and the larger channel around this in the cylinder 11.
steam for reciprocating a piston in the engine cylinder
Instead of the plain piston heads shown at the ends of
and is a `divisional patent. application containing subject
the piston 12 in FIGS. l and 2, the ends of the piston 12
matter villustrated and described in my pending patent ap
plication Serial No. 27,020 ñledMay `5 1960 for Fuid 15 of FIGS. 3 and 5 are provided with a jacketing system
19 so apart of the circulating fluid can pass throughthe
Cooled Pistons for High Temperature Engines.
‘ The main object of my invention is to provide improved
meansfforv circulating a cooling agent` or cooling seal
` heads and around the endiofl the piston Vrod 13.
To
stimulate circulation, a partition 15 is placed in the enter
ing andlubricating agent throughthe pistons of an engine
ing passage way and the fluid is divided and forced at high
Efforts ,have ’been made to 20 velocity each way around the piston 12, see arrows. The
ejector eiîect set up helps >pull a part of the circulating
circulate such agents through engine pistons but the mech
agent through the jackets 19 provided in the heads of the
anisms heretofore devised for that purpose have employed
piston 12, as indicated by arrows, each time the piston
>flexible connections, a change in volume or intermittent
stops in proper position with respect to the passage way
How which have proven inetiicient and unsatisfactory
of the character stated.
1n use.
,
lOther objects and advantages of the invention will be
come apuparent from the drawings and following specifica
tions, in which like numbers designate like or similar parts
throughout t-he several views and in which:
25 and inlet in the cylinder at 2_2. When the channels
. in the piston 12 are not in communication with the inlet
and outlet at 2_2 in the cylinder 11 the circulating agent
can continue to circulate around the outside of the piston
12 and through the jackets 1‘9 in the heads of piston 12
FIG. 1 is a longitudinal sectional view of a long double 30 funtil again acted upon by the entering fluid at 2_2 in the
acting‘piston Vand a cylinder barrel embodying my in
veriti'on".`
p.
v
.
`
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’
` FIGJQ,
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cylinder 11.
The FIG. 4 is a cross sectional View of one end of a
'
sectional view of FIG. l on
piston 12 on the section line 4_4 of FIG. 6 and shows a
webbed construction 22 which may be used in special
' FIG. 3 is ".a’rnoïdiñcation' cross sectional View on the 35 cases in place of the jacketed heads 19 of the piston 12
shown in FIG. 3. The webs 22 help conduct heat from
the center of the piston heads and from the end of the
applied to the heads of the piston of FIG. 5 and a small
piston rod 13 to the outer edge of the piston 12 and
partition in theenteringpassage way.
then into the circulating agent in the channels around the
FIG. 4 is a cross sectional view as at 4_4 of the piston
of FIG. 6 equipped with a webbed construction for con 40 ends of the piston 12.
section line 3-`-13Afof` FIG. 5 and shows a jacketing system
ducting heat.
FIG. 5 is a longitudinal sectional view of a modified
construction of FIG. 1.`
»
FIG. 6 is a longitudinal sectional view of a piston having
a webbed construction in the heads.
The additional FIGURE 5 shows how the circulating
agent circulates through the jackets 19 in the end portions
of the'piston 12. The dividing partition 15 can be seen
in the entering passage way.
The additional FIG. 6 shows the details of a piston
having'a webbed construction in the heads for conducting
heat to the outside of the trunk of the piston.
From the description of the means for circulating a
Referring to FIG. 1, which gives the general idea of my
circulating means, the numeral 10 indicates the cylinder
heads closing the ends of the cylinder 11 while the long
piston 12 is free to reciprocate in the cylinder 11. The 50 cooling agent, or cooling, sealing and lubricating agent
around and through pistons shown herein, it will be noted
piston 12 is provided with the usual round piston rod
the mechanism is entirely free of flexible connections or
13 and piston rings 14, or other means ot securing a
changes in volume as the pistons 12 reciprocate and a
seal at the ends of the piston 12. Channels are provided
large continuous opening is provided -for all positions of
around the ends of the piston 12 for holding the circulating
agent as shown at the section lines 2_2 and K_K. The
center of the cylinder 11 is also provided with a channel
completely around its inside as shown at the section line
the pistons 12.
By circulating the Huid through the pistons 12 under
suñicient pressure the hot gases expanding behind the
heads of the pistons 12 will not be able to blow past the
rings 14, or other sealing means, at the ends of the pistons
and 3 also. The channel has an inlet at one side and
an outlet at the other side for the circulating agent to enter 60 12. Graphite or other lubricants of sufficient body can be
sent through in the circulating agent to lubricate and
and leave. It is to be noted, in this design, the circulating
2_2 in dotted lines and it is clearly shown in FIGS. 2
agent enters one of the passage ways at 2_2 and cir
culates around the piston 12 and leaves from the opposite
opening at 2_2 in the cylinder 11. The chambers around
seal the rings 14 and pistons 12 against leakage into the
ends of the cylinder 11.
In the appended claims, the expression “circulating
the ends of the piston 12 at 2_2 and K_K trap a 65 agent” is employed to designate a cooling medium or a
portion of the circulating agent and carry it along the bar
l rel of the cylinder 11 each way from the central passage
cooling, sealing and lubricating agent, whichever may
be employed. Water, oil, wet air, Saturated steam and
way in the cylinder 11 at 2_2. Thu-s; the central por~
other gases, liquids or vapors may be used in the cir
tion of the piston 12 reciprocates through a steady stream
culating system. When boiling liquids and Wet vapors
of fluid while the end portions of the cylinder barrel 11 70 are used, the cooling is done by evaporation and a uni
are alternately exposed to the ñuid trapped in the chan
form temperature can be had throughout the engine as
sembly.
nels around the end portions of the piston 12. Both the
3
3,076,440
4
Changes may be made in the details of construction
and in the form and arrangement of parts without de
parting from the scope of the invention as deñned by
3. In a reciprocating piston engine of the double act
ing type, a cylinder with a piston reciprocating therein,
the appended claims.
and restricted at its entrance to the inside of the cylinder
barrel and at a point part way around the cylinder, an
outlet provided'for said circulating agent and a channel
around the inside of said cylinder barrel connecting said
I claim:
l. In a reciprocating piston engine of the double act«
ing type, a cylinder with a piston reciprocating therein,
said cylinder having a centrally arranged inlet for ad
said cylinder having a centrally arranged inlet divided
inlet and outlet passage ways so said piston can reciprocate
through a steady stream of said circulating agent, a piston
mitting a circulating agent to the inside of the cylinder
barrel and at a point part way around the cylinder barrel, 10 longer than the travel of said piston provided with a seal
ing means adjacent its ends, said sealing means located
an outlet provided for said circulating agent to leave, a
a greater distance apart than the travel of said pistou and
channel extending completely around the inside of said
so located that a positive seal against leakage of said
cylinder barrel for providing a continuous passage for
circulating agent into the ends of said cylinder barrel
the circulating agent from the inlet to the outlet in said
can be made effective', said piston provided with passage
cylinder barrel around the trunk of said piston at all
ways around its outer surfacel and through the heads
times, said piston being _longer than the travel of said
piston and provided with a sealing means adjacent its ends,
thereof and around the piston rod in said piston, suitably
said sealing means stationed a greater distance apart than
located for conducting said circulating'agenn'said cylinder
the travel of said piston and so located that a positive
provided with a means closing the ends thereof. '
seal against leakage of said circulating agent into the
ends of said cylindervbarrel can be made effective, said
piston provided With a passageway around it for holding
said circulating agent and the passageway being in com
munication -with said inlet, outlet and passageway in said
cylinder barrel part of the time, said cylinder provided 25
with a means closing both ends thereof.
2. In a reciprocating piston engine of the double act
ing type, a cylinder with a piston reciprocating therein,
said cylinder having a centrally arranged inlet for ad
mitting a circulating agent to the inside of the cylinder 30
barrel and at a point part way around the center of said
cylinder, an outlet provided for said circulating agent,
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4. In a reciprocating piston 'engine of the double acting
type, a cylinder with a ‘piston reciprocating therein, said
cylinder having a centrally arranged inlet for" admitting
a circulating agent to the inside of the cylinder barrel
and at a point part way around the inside of the cylinder
barrel, an outletprovided for said circulating agent, a
channel extending completely around the inside of the
cylinder barrel for providing a continuous passage for
the circulating agent around the trunk of the piston and
from the inlet to the outlet in said cylinder barrel, a piston
longer than the travel of said piston provided with a
sealing means adjacent its ends, said sealing means sta
tioned a greater distance apart than the travel of said pis
ton and so located that a positive seal against leakage of
and .a channel extending completely around the inside of
said circulating agent into the ends of said cylinder barrel
said cylinder barrel for providing a continuous pas
sage for the circulating agent around the body of said 35 can be made effective, said piston provided with pas
sageways around it for holding said circulating agent, and
piston from said inlet to said _outlet passage Ways, said
the passageways being alternately in communication with
piston longer than the travel of said piston and provided
said inlet, outlet and passageway in said cylinder barrel,
with a sealing means adjacent its ends, said sealing means
said cylinder provided with a means closing `both ends
stationed a greater distance apart than the travel of said
piston and so located that a positive seal against leakage 40 thereof and a webbed construction inside of the piston
heads for conducting heat from the center of the piston
of said circulating agent into the ends of said cylinder
head and from the end of the piston rod to the circulating
barrel can be made effective, said piston provided with
agent in the channels around the inside of the cylinder
passageways suitably located around its outer surface for
barrel and into the circulating agent in the channels around
holding said circulating agent and a jacket through t-he
piston heads and around the piston rod for said circulating 45 the outside of the piston.
`
agent and a partition in the inlet in said cylinder barrel
No references cited.
for dividing and restricting the flow of the circulating
agent entering said cylinder barrel and said cylinder pro
vided with a head means closing the ends thereof.
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