close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2132509

код для вставки
0a. 11, 1938.
s. S.ICOOK '
2,132,509
TURBINE
Filed March 11, 1937
KN
‘wm$u52‘4.F3?%.
<a
(J/
412%
‘ INVENTOR
MC
M
ATTORNEYS
2,132,509v
Patented Oct. 11, 1938
UNITED STATES PATENT OFFICE
2,132,509
TURBINE
Stanley Smith Cook, Newcastle-on-Tyne, Eng
land, assignor to C. A. Parsons and Company
Limited, Newcastle-on-Tyne, England
Application March 11, 1937, Serial No. 130,348
In Great Britain March 12, 1936
2 Claims. (01. 253-70)
23, is formed in the main casing of the turbine
. The invention relates to elastic-?uid turbine
units having ahead and astern sections within a
common casing and is an improvement in or
modi?cation of the invention described in patent
5
speci?cation, No. 1,885,512.
With the object of e?fecting improvements in
such units, the present invention consists in the
combinations of elements hereinafter set forth
and particularly pointed out in. the claims.
The accompanying drawing shows a half lon
gitudinal section through an ahead and astern
turbine according to one form of the present in
vention.
In carrying the invention into effect accord
ing to the form shown in the accompanying
drawing, the high-pressure ahead turbine, A, is
of the reaction type, steam being admitted by
the inlet pipe, 2, at one end of the rotor and ex
hausted by the pipe, 3, at the other end.
The astern turbine, B, of the impulse type is
20
mounted on the same rotor, 4, as the ahead tur
bine, A, and is disposed within the same casing,
5, at the inlet end of the ahead turbine, the astern
steam admission being shown at 6, and the ex
25 haust at ‘I. .
The ahead turbine, A, and the astern turbine,
B, are divided by a conical diaphragm, 8, packed
at 9 in relation to the common rotor body, 4, of
the two turbines, the exhaust end of the astern
30 turbine being disposed in proximity to the inlet
end of the ahead turbine.
At a point between the diaphragm packing, 9,
and the blades of the ahead turbine, a dummy is
disposed which consists in general of a cylin
drical member, ll, of greater external diameter
35
than the diameter of the diaphragm packing, 9,
this cylindrical member being secured to the
rotor shaft and rotating within a second cylin
drical member, l3, supported in its operative po
sition solely by a conical wall, It, projecting in
40 wardly from a part of the outer casing wall and
parallel to the diaphragm, 8, thereby leaving be
tween the diaphragm, 8, and this conical wall,
I8, an intermediate space or chamber, F‘, pro
vided with a ?anged branch-piece, 2 l, for connec
45 tion as by a pipe, 2 la, to a low-pressure point of
the range of expansion of the ahead-turbine
steam.
_
In addition, from a point or pocket, 22, at about
0 the mid-length of the gland or packing, 9, be
tween the diaphragm, 8, and the shaft, a duct,
which conveniently runs radially and ends in a
facing, 24, a pipe, 24a, secured to which is con
nected to the condenser, G.
Steam from the operative turbine is prevented 5
from reaching the inoperative turbine in view of
the packed diaphragm, 9, and connection to the
condenser, while the loss entailed by steam leak
ing past the dummy, when the ahead turbine is
operative, is small because the whole axial length '10
of the dummy is effective in preventing leakage.
Variations may be made from the exact struc
ture described without exceeding the scope of the
invention.
15
What I claim is:
1. An elastic-?uid parallel-?ow turbine unit,
comprising an ahead turbine and an astern tur
bine having a common rotor body and a common
casing, at least one of said turbines being of the
reaction type, the exhaust end of said astern 20
turbine being arranged adjacent the inlet end of
said ahead turbine, casing diaphragm means be
tween said ahead and said astern turbines, said
means having one wall adjacent the exhaust end
of said astern turbine and another wall adjacent 25
the inlet end of said ahead turbine, a packing
between each of said walls and said common rotor
body and means for connecting an intermediate
point of the length of the packing of the former
of said walls to a lower-pressure point in the 30
range of expansion of said turbine unit. ,
V
2. An elastic-?uid parallel-?ow turbine unit,
comprising an ahead turbine and an astern tur
bine having a common rotor body and a common
casing, at least one of said turbines being of the
reaction type, the exhaust end of said astern tur
bine being arranged adjacent the inlet end of
said ahead turbine, casing diaphragm means be
tween said ahead and said astern turbines, said
diaphragm means having walls extending in
wards from said casing and spaced apart axially
of said turbines with a chamber therebetween,
said diaphragm means including a dummy be
tween said common casing and said common
rotor, the whole of the stationary part of said 45
dummy being carried solely by one of said walls,
and means for connecting said chamber to a
lower-pressure point in the range of expansion of
said turbine unit.
STANLEY SMITH COOK.
Документ
Категория
Без категории
Просмотров
0
Размер файла
179 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа