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Патент USA US3043507

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July .10, 1962
R. GABBIONETA
3,043,493
ROTARY LIQUID RING PUMP WITH MEANS FOR REGULATING
THE LOADING OF LIQUID IN THE RING
2 Sheets-Sheet 1
Filed Dec. 15, 1960
i:Z
July 10, 1962 ROTARY
Filed Dec. 13, 1960
_ R. GABBIONETA
'
3,043,498
LIQUID RING PUMP WITH MEANS FOR REGULATING
THE LOADING OF LIQUID IN THE RING
2 Sheets-Sheet 2
United States Patent
lC€
Patented July 10, 1962
2
1
in case the operating characteristics of the pump should
undergo substantial changes.
3,043,498
ROTARY LIQUID RING PUlVIP WITH MEANS FOR
REGULATING THE LOADING OF LIQUID IN‘
THE RING
Roberto Gabbioneta, Via Gasparotto 4, lVlilan, Italy
-
”
3,043,498
f.
For a given speed of rotation, the nozzles ensure the
correct circulation for the entire range of normal work
ing of the machine.
_
In fact for every increase in the working pressure, an
Filed Dec. 13, 1960, Ser. No. 75,497
increase in the pressure at which the liquid reaches the
'2 Claims. (Cl. 230-79)
is established and hence a greater pressure at the mouths
Claims priority, application Italy Dec. 29, 1959
section of the passage immediately preceding the nozzles
The present invention relates to rotary pumps of the 10 of the nozzles themselves, whereby the loading of the
liquid in circulation is increased.
With these and other objects in view, which will be
come
apparent in the following detailed description, the
It is well known that in pumps of this kind in use at
present invention will be clearly understood ‘in connec
present, part of the actual liquid comprising the ring
15 tion with the accompanying drawings, in which:
escapes from the compression outlet.
FIGURE 1 is a section of the pump along the lines
This part of the liquid which has absorbed the heat
1--1 of FIG. 2, and
of compression, has to be continually replaced by an
liquid ring type designed for the regulating the loading
of liquid in the ring.
FIG. 2 is a section along the lines 2—-2 of FIG. 1.
Referring now to the drawing, the pump comprises a
When, as often happens in the chemical industry, the
ring is composed of a special liquid, a closed circuit is 20 body 3 with an internalwall having two surfaces which
are eccentric with respect to the axis of rotation of a
established along which the same liquid circulates.v
rotor 4. The rotor 4 is keyed onto a driving shaft 7. A
The liquid, which escapes from the compression out
non-rotatable member 1, carrying the intake 8 and the
let with the compressed gas, is separated in a device de
outlet 9, has disposed therein a conical distributor 2.
signed for this purpose ‘and returns to the pump after
having been passed through ‘a heat exchanger which 25 In the distributor 2 is disposed a passage 10 wherein the
equal quantity of cooled liquid.
cooled liquid returning to join the revolving ring in the
cools it to the required degree.
For every compression ratio there is a quantity of
liquid in circulation which corresponds to an optimum
gas intake loading. The most appropriate liquid loadingv
body 3 ?ows. From the channel 10 the liquid reaches
the inside of the chamber in the body 3 through two
nozzles 5 and 6.
The nozzles are removable and can be replaced in
depends on the characteristics of the machine and the 30
cases where the working characteristics of the pump have
working pressure, and increases with the working pres
to be appreciably modi?ed.
sure.
‘
When the pump is working, part of the liquid of the
revolving ring escapes with the compressed gas through
The quantity of liquid has therefore to be appropriate
ly controlled. This control is usually provided by means
of a suitable cock inserted in the piping which carries the 35 the outlet 9.
The liquid, having been separated from the gas in the
actual liquid.
apparatus
provided for this purpose, and having been
Naturally when the machine is ?rst started, it is neces
cooled in the heat exchanger (not shown), returns to the
sary to make an accurate adjustment and there is ‘always
pump through the channel 10 at a pressure which is little
the danger that the setting of the cock be accidentally
40 less than that of the compression of the gas at the mouth
altered thus changing the e?ectiveness of the machine.
of the outlet 9, because the loss of pressure by the liquid
It is one object of the present invention to provide a
in the course of its movement through the apparatus and
rotary liquid ring pump with means for regulating the
piping, can be kept within very small limits. The conical
loading of liquid in the ring, which eliminates this dis
distributor 2 forms at its inner end a “hub” chamber 10'
advantage and to obtain better working and greater ef
which communicates with the nozzles 5 land 6.
?ciency of the pump.
45
From the channel 10 the liquid returns to the ‘inside
It is another object of the present invention to provide
of
the body 3 passing, as already mentioned, through the
a rotary liquid ring pump with means for regulating the
“hub” chamber 10" and the two nozzles 5 and 6.
loading of liquid in the ring, wherein the cooled liquid
The position of the nozzles (FIG. 2) is such that the
returning to the inside of the chamber in the body where
in the rotor revolves, reaches the chamber through a pas 50 liquid acquires a relative velocity in a radial direction
with respect to the rotation of the rotor 4. As a conse
sage situated inside a frusto-conical distributor, from
quence, the liquid enters the chamber inside the body 3
which passage the liquid passes into the actualchamber
without being obstructed ‘by the blades of the rotor 4.
through one or more removable and replaceable nozzles.
While I have disclosed one embodiment of the present
The nozzles are ?tted in such a position that the ve
locity of the liquid leaving the nozzles compounded with 55 invention, it is to be understood that this embodiment
has been ‘given by example only and not in a limiting
the peripheral velocity of the rotor at the point of en
sense, the scope of the present invention being deter
trance of the blades, provides a relative velocity in a
mined by the objects and the claims.
radial ‘direction with respect to the rotation of the rotor
I claim:
' itself, that is to say in the direction in which the blades
protrude from the rotor.
The liquid thus enters the chamber without offering
resistance to the blades of the rotor and thereby increases
the efficiency of the pump.
It is yet another object of the present invention to pro
60
.
1. In a rotary liquid ring pump for the intake and com
pression of gas,
a hollow body having an internal wall including two
surfaces disposed eccentrically with respect to the
axis of rotation of said pump,
a driving shaft rotatably mounted in said hollow body,
vide a rotary liquid ring pump with means for regulating 65
‘a rotor keyed to said driving shaft and rotatably dis
able and replaceable nozzles.
a conical distributor disposed coaxially with said driv
ing shaft and partly within said rotor,
the loading of liquid in the ring, wherein the ?ow of
liquid, required to give the best operation of the com
pressor, is determined, for example, by a pair of adjust
'
The optimum liquid loading is established at the time 70
of construction and in accordance therewith nozzles of
the right size are ?tted and said nozzles can be changed
posed in said body,
a non-rotatable member including an inlet and an out
let and surrounding said conical distributor,
said conical distributor de?ning at its inner end a cham
3,043,498
~
3
<
4.
.
.
her and ‘an axially. disposed channel communicating
with said chamber,
2. The rotary liquid ring pump, as set'forth in claim
1, which includes
at least one nozzle removably disposed in said conical
two nozzles mounted in said conical distributor with
distributor between said chamber and said rotor and
positioned ‘such that the liquid ‘fed through said 5
channel and ejected from, said nozzle into said c‘hamsber acquires a relative velocity in radial direction
with res act to the rotation of said rotor, in vorder
to feed spaid liquid unobstructively through said rotor
into said body.
-
parallel axes and disposed in opposite directions.
References Cited in i116 ?le Of this Patent
FOREIGN PATENTS
484’93’6
10
Italy ____________ ‘“ Sept‘ 24’ 1953
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