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Патент USA US2137129

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NW- 15, 193%.
2,137,129
J. BROWN ET AL
ROTARY VALVE FOR INTERNAL COMBUSTION ENGINES
_Filed Nov. 9, 1957
22
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Nmh 15, 193$‘
.1. BROWN ET AL‘
2,137,129
ROTARY‘VALV'E FOR INTERNAL COMBUSTION ENGINES
Filed Nov.‘ 9, 1937
5 Sheets-Sheet 2
I
v
NQV- 15,=~1933-
J. BROWN ET AL
$2,137,129
ROTARY VALVE FOR INTERNAL COMBUSTION ENGINES
Filed NOV. 9‘, 1957
A
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3 Sheets-Sheet 3 I
Patented Nov. 15, 1938
7 2,137,129
,‘ UNITED-‘STATES.
PATENT OFFICE ~
2,137,129
ROTARY VALVE vFOR INTERNAL ‘COMBUS
TION ENGINES
Edward Brown, Wednesbury,
John Brown 1 and
England
' ‘
' wApplication November 9, 1937, Serial No. 173,684
In Great Britain November 11, .1936
6 Claims. ‘(CL 123-190)
This invention comprises certain improvements l2, while the other part has a similar inclined face
in or relating to rotary valves .for internal com
bustion engines. _
.
>
M, the . inclinedfaces sliding on one another as
'7
.
By this inventiona continuous circulation of oil
5 is fed into a recess in the rotaryvalve to cool the
valve. ;,A continuous circulation of oil is also fed
2, the sealing element being let into a recess in the
to the bearing‘su'rface of the rotary valve and the
detachable head. or The‘ ‘sealing element has a
oil is directed‘ frominlet ducts to outlet ducts.
port l6 therein which registers with the inlet and
exhaust ports in the rotary valve as such valve
rotates, and a surrounding surface I‘! which forms
a sealing surface around the port. The sealing
into which latter ducts the oil-is directedvby the
'10 sealing pad aforementioned.’
Referring to the drawings‘:
’
_.
v
Fig. 1 is a cross sectional elevationof .a cylin—.
der head of an internal combustion engine having
a rotary valve mechanism constructed according
16
the split ring expands or contracts. A_ sealing
element l 5 is interposed between the sealing ring
l0 and the cylindrical surfaceof the. rotary valve
to this invention...
7
'
' '
Fig. 2 is a section of the cylinder head on line
II-II of Figure 1, the rotary valve being shown
in full lines.
,
,
‘
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‘
.
it?
element is pressed against the Valve 2 by means
of a spring “3 (Figure 5); The sealing ring [0,
not. only expands radially under spring tension
but also tends to slide up‘ the conical seating 9 it?
to press against the ?at. outer surface of the ele
mentl5.,'
,
'
' The exhaust port l9 in the valve is ?tted with
a pipe‘20. which is heat insulated from the body
Fig. 3 is a section on line III‘,—III of Figure 2.
Fig. 4 is a perspective View of the sealing, pad. , of the valve by means of asbestos lining 2|. The
Fig. 5 is a perspective View of vthe spring'ring pipe 20 has a spout 22 to prevent‘ formation of
for bearingon the sealing'pad.
‘
,.
carbon. The exhaustport passes from one end of
Fig. 6 is a perspective View. of the sealing ring... the. rotary valve whilst the inlet port ll passes
Figs- 7 and .8' arerespgectively end ‘views of the from the other end.
' '
.
.
25 split ends of the sealing ring.’ , ‘ ‘
During the ?ring stroke one side of the valve is
Fig. _9 is. a perspective view of the oiling pad,_. subjected to considerable heat and this side has an
and
'
oil cooling chamber 23 through which oil con
Fig. 10 is‘a section through'the cylinder. head’ stant'ly circulates. _‘ A groove 24 is formed in the
with the rotary valve removed, the section being cylinder head around the periphery of the bearing
30. taken on line X-—.X of‘ Figure 3.
ring 4. and this groove is in communication with a
According to a convenient embodiment, the: non-return valve spring ball controlled oil inlet
invention is applied toa singlecylinder air cooled 25. Thegroove 274 is’ placed in communication '
motorcycle engine. The detachable head I has a with an annular groove 26 in the internal surface
20
cylindrical "bore for receiving a cylindrical rotary, of the bearing ring 4 by means of passages 21
35 ‘ valveZ which is ?xed in position by the lock nut
3 which bears against .the bearing ring 4. slidably
and, the groove 26. is placed in communication as;
with the chamberf23 by means of the passages
but non-rotatably mounted in the cylinder head.
I‘. An oil seal is formed by a metal ring 5 which
28. The chamber 23 is divided by a central par
tition 29 and the passages 28 lead to one side of
is clamped between ‘the bearing ring _4 and the this partition. Outlet passages 30 lead from the
40 cylinder head I at its outer periphery and spring chamber 23 on the other side of the partition 29
pressed at its inner periphery against the shoulder and such passages 30 lead to an annular groove 3|
6 on the rotary valve. The rotary valve is driven‘ in the bearing ring 4. This groove 3| communi
by a bevel gearing ‘I and 8.
The detachable head I has a port having a
45
conicalfseating 9, for receiving a sealing ring ID.
The sealing ring I0 is formed of cast steel or other
metal and has a conical outer circumference for
bedding against a conical seating 9 around the
port. The inside face of the ring curves in
50 wardly from the ?at seating I2 to the inner edge
of the conical outer wall. The ring is split and
stepped so that the split ends overlap. Prefer
ably for this purpose an inclined face I3 is cut
on one side of the ring from a point below the
55
middle of the conical outer wall to- the flat seating
cates by way of passages 32 with .a passage 34
returning the oil to the source of supply. The oil
‘is thus continuously circulated through the cool
ing compartment 237 while the bearing ring 74 is
also eiiiciently lubricated.
, i
In order to ‘lubricate the cylindrical wall of
the rotary valve by means of a constantly circu
lating flow of oil, a lubricating pad 35 is pressed 50
against the wall of the valve, this pad has two
end limbs 36 having oil ducts 31 which emerge
from the raised portion 38 bearing in the an
nular grooves 39 in the cylindrical valve. The
lubricating pad 35 has a U-shaped passage 39a 55
2
2,137,129
which communicates with the flow and return
pipes 40 and 4| which communicate with ducts
42, 42a in a bridge piece 43 ?xed to the cylinder
ber is behind that portion of the valve which
closes the combustion chamber during the ?ring
head. The pipes 40 and 4| spring support the
lubricating pad 35 and such pad 35 is pressed
3. A rotary valve mechanism for internal com
bustion engines, comprising a cylinder head, a
on the valve 2 by means of a member 44 pressed
outwardly by means of a spring 45, the pressure
of which may be adjustable to govern'the ?lm of
oil supplied through the ducts 38. The duct
cylindrical rotary valve mounted in the head, and
10 42 is in communication by means of the passage
stroke.
,
means for feeding oil to the bearing surface of
the valve‘ wall comprising an oiling-pad pressed
against the wall of said cylindrical valve and hav
ing an oil duct or ducts fed from a continuous 10
46 with the oil supply entering the valve 25,"
whilst the duct 42a returns the oil to the source
of supply. The lubricating pads have inclined
projections 41 which scrape the oil passed
15 through the ducts 38 inwardly of the rotary valve,
the rotary valve rotating in the direction from
circulating stream of oil which oil duct or ducts
open directly on the wall of the valve, and scraper
“devices and oil channels for directing the oil
from the feed ducts over the surface of the rotary
, valve to outlet ducts leading the oil back to the 15
source of supply.
the scrapers 41 to the ducts 38.
‘
The bearing
4. A rotary valve mechanism for internal com
surface of the cylinder head is provided‘ with - bustion engines, comprising a bore in the cylin
inclined oil channels 48 which collect the oil, der head, a cylindrical rotary valve mounted in
20 from the surface of the rotary valve and direct the bore, an oiling pad, a spring device for press 20
the same towards the centre of the valve. These ing the oiling pad against the wall of the rotary
grooves 48 are shaped to scrape the oil into the valve, and means for feeding oil to the bearing
grooves. The oil therefore is caused to flow to
wards the centre of the rotary valve and the
25 sealing element l5 forms a scraper and causes
the oil to flow away through the ducts 49 into
- the ‘annular groove 50 which is in communica
tion with the duct 5| for returning the oil to the
source of supply. The continuous flow of oil
30 therefore lubricates the bearing surface of the
rotary valve, whereby oil is prevented from burn
ing and carbonizing. Annular grooves 55 are
formed in the cylinder head on each side of the
valve and these annular grooves are in communi
35 cation withthe groove 50 so that any oil which
iiowsoutwardly on the rotary valve will also be
returned to the source of supply.
The outer end of the rotary ‘valve on the in
let side is sealed by means of a rubber ring 52
40 which is pressed between the washer and a cas
ing 53 by means of a spring ring 54.
We claim:
1., A rotary, valve mechanism comprising a cyl
inder head, a rotary cylindrical valve mounted
45 in the cylinder ‘head, a bearing ring or member
surface of the valve wall, said oiling pad hav
ing an oil duct fed from a continuous circulat
ing stream of oil which oil duct opens directly 25
on the outer surface of the valve, and a scraper
device and oil channels for directing the oil from
the feed duct over the surface of the rotary valve
to outlet ducts leading the oil back to the source
of supply.
,
30
a
5. A rotary valve mechanism for internal com
bustion engines, comprising a bore in the cylin
der head, a cylindrical rotary valve mounted in
the bore, an oiling pad, a spring device for press
ing the oiling pad against the wall of the rotary 35
valve, and means for feeding oil to the bearing
surface of the valve wall, said oiling pad having
an oil duct fed from a continuous circulating
stream of oil which oil duct opens directly on the
outer surface of the valve, a scraper device on 40.
the oiling pad for diverting the oil centrally of
the valve and oil channels in the bore of the
cylinder head for causing the oil to ?ow towards
the centre of the valve.
6. A rotary valve mechanism for internal com
on one'side of the valve and ?tted in an annular
bustion engines, comprising arbore in the cylinder
recess in the cylinder head, an annular oil duct
surrounding the periphery of the bearing mem
ber, two annular ducts around the internal pe
50 riphery of the bearing member, and ducts in the
head, a cylindrical rotary valve mounted in the
bore, an oiling pad, a spring device for pressing
' wall of the valve for registering with ducts lead
ing to the respective annular ducts or the in
terior of the bearing member for the feed and
- return ?ow of oil to an interior chamber in the
valve for cooling the valve.
2. A rotary valve mechanism comprising a
cylinder head, a rotary cylindrical valve mounted
in the cylinder head, a bearing ring or member
on one side of the valve and ?tted in an annular
60 recess in the cylinder head, an annular oil duct
surrounding the periphery of the bearing mem
ber, two annular ducts around the internal pe
riphery of the bearing member, and ducts in the
wall of the valve for registering with ducts lead
ing to the respective annular ducts or the in
terior of the bearing member for the feed and
return ?ow of oil to an interior chamber in the
valve for cooling the valve, which cooling cham
the oiling pad against the wall of the rotary valve,
and means for feeding oil to the bearing sur
face of the valve wall, said oiling pad having;50
an oil duct fed from a continuous circulating
stream of oil which oil duct opens directly on
the outer surface of the valve, a scraper device
on. the oiling pad for diverting the oil centrally 55
of the valve, and oil channels in the bore of the
cylinder head for causing the oil to flow towards
the centre of the valve, a sealing element bear~
ing against the wall of the rotary valve having
ducts at the side for leading oil from the wall 60
of the‘ cylinder to return such oil to the source
of supply, and a sealing ring forming a gas tight
seal with a sealing in the port leading from the
combustion chamber and a gas tight seal with
the said sealing element.
65
'
JOHN BROWN.
EDWARD BROWN.
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