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Патент USA US2106804

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Feb. 1, 1938;
Filed March 25, 1936
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Patented Feb. 1, 1938
2,106,804 '
John Kirgan, Easton, Pa... assignor to Ingersoll
Band 00mpanm'Jel-sey City, N. 1., a corpora
tlon of New Jersey
Application March 23, 1936, Serial No. v‘76,213 _
7 Claims. (Cl. 230-103)
This invention relates to thermo-compressors , “throat-piece?’ or tubular sleeve l3 which is at
of the steam-jet booster type, and particularly
to a. steam-jet booster
tion of capacity.
Cl .
for the regula
An object of the inv'entionls to provide a steam—
jet booster having a number of discharge nozzles
capable of being supplied with steam or the like
medium in such a manner that the capacity of
the booster can be adjusted as required.
Another object of the invention is to increase
the e?iciency of a thermo-compressor by minimiz
ing vortical action in the compressor.
tached at one end to the supporting plate 5 and
projectsv beyond the nozzle 1 into the discharge
flue ‘3 at the other. The sleeve l3 forms a dis
charge passage for the nozzle ‘I and cooperates 5
with the conduit 3 to form other discharge pas
sages for the nozzles 6. These passages lead
from the inlet opening 2 and later merge into a
common passage leading into the throat of the
diffuser conduit 3. The point of merger is pref‘ l0
erably adjacent the throatsection, and the dis
charge passages are preferably constantly open
.and uncontrolled. The portion of this tubular
sleeve which lies within the conduit 3 is tapered,
15 with the drawing, illustrate a preferred embodi
as indicated at ii, to conform to the shape of the 15
ment of the invention. But the disclosure is for a conduit, and adjacent to the plate 5 the sleeve ‘I3
purposes of explanation only and I may, oflcourse, may have one or more openings l4 around the
Other objects and advantages will be made
apparent in the followingdescription which, taken
vary the construction shown in‘ various ways
without exceeding the scope of the appended
On the drawing, Figure 1 is a longitudinal
section of a thermo-compr'essor according to this
invention, and
Figure 2 is a cross section on the line 2-2 of
25 Figure 1.
The same numerals indicate the same parts
The main casing or head of the ejector or boost
er is indicated at l' withan inlet opening at the
30 bottom as shown at 2. The discharge ?ue or
cli?user'conduit 3 is preferably provided with a
throat section~andprojects from one side ofthe
casing I, and at the opposite side of the casing
is a steam chest 4. The latter side of the'casing
35 is open when the casing is formed, but when the
ejector is completed it is closed by a supporting
plate 5 in which are mounted the discharge noz
zles 6 and ‘I. The steam chest 4 ?ts over the outer
face of the plate 5 and in practice is preferably
40 divided into two or more compartments into
which the steam or other power medium enters
before passing through the discharge nozzles 3
and 1.
In the construction illustrated the nozzle 1
45 is at the center of the ejector and the nozzles 5
surround the nozzle ‘I. The nozzles 5 are all
connected to a ‘single chamber 8 in the steam
chest 4 and are supplied from a pipe 9, while the
central nozzle 1 communicates with another
50 chamber I70 in the steam chest, this chamber
being supplied from a pipe H. The chamber 3
surrounds the chamber 10. The pipes 9 and H
are controlled by hand-operated valves indicated
at 12.
circumference thereof.
In practice the ejector may be mounted upon
a vessel called an evaporator in which vapor. is 20
generated and with which it ‘communicates
through the inlet 2, and the vapor will be drawn
through the inlet 2 in the casing- I and then
forced through the ?ue 3 into a condenser where
both the steam and vapor may be lique?ed.
When all the nozzles are in use the booster will
‘ be operating at its maximum capacity. ~To re
duce the capacity of the booster the steam com- -
ing from the pipe ll may be throttled until the
pressure of the steam issuing from the central 30 .
nozzle 1 is so reduced that‘ it nolonger-has any
vapor-removing effect. Then vthe steam from
this nozzle will not continue to ?ow out of the
tapered end of the sleeve l3 and some of the
vapor entering the casing and some steam from 35 I
the nozzles 6 may break back into and circulate
through the sleeve I3. The throttled steam issu
ing from the nozzle 1 will thus be added to the
load carried by the other nozzles and the volume
of vapor entering inlet opening 2 will drop. The 40
presence of the openings I4 will facilitate this
operation because when the- pressure of the steam
issuing from the nozzle 1~is reduced far enough
so that vapor and steam can enter the sleeve l3
where it projects into the ?ue 3 this vapor and 45
steam together with the throttled steam from
nozzle ‘I will ?ow out through the openings I4
and be ‘added to the volume of vapor which enters
the casing through the inlet 2. The steam from
the nozzles 6 will therefore do less work on the 50
vapor entering through the inlet opening 2 and
the amount of vapor removed from the evapo-‘
rator will decrease because thenozzles 6 must
also carry off the steam issuing from the nozzle
I dispose the centre! nozzle ‘I inside a so-called ‘ ‘I and any of their own steam which is backing. 55
up through the sleeve l3. Hence the e?ective , inlet and ‘outlet opening, nozzles in the casing
capacity of ‘the ejector is much lower.
The capacity of theeiector can thus be re
duced to an even greater extent than would be
Cl the case if the steam for the nozzle ‘I were to be
cut of! entirely, since by admitting some steam
at very low pressure into the sleeve I! through
the nozzle ‘I, said nozzle then not only fails to do
any work but it also adds to the burden upon
10 the other nozzles and the capacity of, the ejector
‘is all the more decreased.
The sleeve It also performs another function
for by forming several separate discharge pas
to discharge power ?uid thereinto, means to sup
ply power ?uid to the nozzles, and a sleeve in
the casing surrounding one of the nozzles and
forming a discharge passage therefor, the other
nozzles being positioned exteriorly to the sleeve
and the sleeve cooperating with the casing and
conforming to the shape thereof to form another
passage into which said other nozzles discharge,
said passages leading from the inlet opening and
merging near the outlet opening, and the sleeve
acting. to separate the ?uid in one passage from
the ?uid in the other passage thereby to minimize
sages for the nozzles 6 and ‘I, the formation of ' vertical action in the discharging power ?uid.
4'. In a thermo-compressor, a, casing having an 15
vortexes in zones of comparative inactivity in the
inlet opening. and de?ning a convergent-divergent
conduit 3, as between nozzles or in front'of in
throat passage leading from the inlet opening,
active nozzles, for example, is e?ectively elimi
' nated. The steam ?owing in each passage is nozzles in the casing to discharge power ?uid into
isolated from the steam ?owing in the other‘ pas
sage, and the nozzles discharging into any one
of the passages, may, therefore, be rendered in
active, or regulated as may be desired, without
said passage, means to supply power ?uid to the
nozzles, and a member surrounding some of the V20
nozzles and extending into the casing to form a
discharge passage‘ therefor, the member having
a convergent portion conforming to the con
creating disturbances in the steam ?owing in the ' vergent
‘portion ofthe casing, said convergent
other'passage. With the sleeve in place vortical
portions forming discharge passages for the noz 25
'25 action, if any, is limited to the zone at the'outlet
not surrounded by- the‘ member, said dis
of the sleeve, but the conduit 3, at this point, zles
passages leading from the inlet opening
is so restricted that the inactive zone is very.
near the throat of the convergent
small, and the ?ow of steam‘ past this point is of ,
such a magnitude as to reduce the action to a divergent passage, and the member acting to 80
shield the ?uid in each discharge passage. from
30 minimum. Vortical action in the discharging
in the other discharge ‘passages.
steam is thereby minimized and the emciency of the'?u'id
5. In a thermo—compressor, a casing having an i
‘the compressor is held at a high level regardless '
inlet opening and de?ning a convergent-divergent
of the number of nozzles in operation.
throat passage leading from the inlet opening,
In‘ modi?cations; it will be ‘understood, that nozzles in the. casing to discharge power ?uid 35
35 each of the outer names 0 may be connected, if
desired to a separate steam pipe and one or
into said passage, means to supply power ?uid
methods of separately controlling the nozzles may
discharge passage therefor, the sleeve having cir 40
more oi’ the nozzles 6 throttled in the way earlier’ to the nozzles,v one of the nozzles being axially ,
' described, it the capacity of the steam ejector aligned with said passage, and a sleeve surround
- is to be reduced still further, or, other well known ing and aligned with the one nozzle to iorm ‘a
be‘ employed.
With this construction and mode of operation
the capacity of the steam ejector can be regulated
over a considerable range according to the
amount of work which the ejector must perform
- at a given time, and the e?lciency of the opera
cumferential openings near the inlet opening, and
having a convergent portion cooperating with the
convergent portion of the casing to form ‘a dis
charge passage for the nozzles not surrounded
by the sleeve, said discharge passages leading
from the inlet opening and merging vnear the
throat of the convergent-divergent passage, and
the sleeve acting to shield the ?uid in one dis
charge passage from the ?uid in the other dis-.
tion is enhanced by preventing the formation of
vortexes in the discharging steam. The con
struction is quite simple and at the same time
very e?'ective for attaining the desired l'ésllltS. \ charge‘passage.
6. In a thermo-compressor having a casing and
I claim:
1. A thermo-compressor having a casing and a number of nozzles for discharging ?uid- into
a number of nozzles therein, means for supplying the casing to compress a ?uid medium, means to
a power ?uid to the nozzles, means for throttling supply ?uid to the nozzles, means for controlling
the ?ow of ?uid to some of said nozzles to vary the operation of the nozzles, and means becom 55
55 th'epressure of such ?uid, and means within the ing effective when certain of the nozzles are in
casing for returning a part of the ?uid discharg-_ active to introduce discharge ?uid into the ?uid
medium to augment the latter and thereby reduce
ing through the casing to the ?uid streams issu
capacity or the compressor.‘
ing from the unthrottled nozzles, the rate of ?uid the7. eil'ective
In a thermo-compressor having a casing and
return being controlled by the pressure of the
' a number of nozzles for discharging power ?uid
throttled ?uid.
' v
2. A theme-compressor having a casing and a
number of nozzles therein, means for supplying
a power ?uid to the nozzles, means for varying
the pressure of the ?uid supplied to some. of
65 said nozzles, and means within the casing where
by at a predetermined pressure of the variable
pressure ?uid a part of the ?uid discharging
through the casing is returned to the ?uid streams
of the remaining nozzles to reduce the e?'ective
70 capacity of the compressor.
3. In a thermo-compressor, a casing having an
into the casing to compress a ?uid medium, means
to supply power ?uid to the nozzles, means for
varying the ?ow of power ?uid through the noz
zles, and conduit means within the casing co 65
operating with certain of the nozzles and becom
ing effective at a predetermined ?ow oi the power
?uid through said certain nozzles to discharge
the latter power ?uid into the ?uid medium be
ing compressed to reduce the effective capacity of 70
the compressor.
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