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Патент USA US2134077

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Oct. 25, 1938.
5, mm
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2,134,077
FLUID TRANSLA'I'ING APPARATUS
Filed Aug. 23, 1934
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Oct. 25, 1938.
E. EHRET
2,134,077
‘ FLUID TRANSLATING APPARATUS
Filed Aug. 23, 1934
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Oct. 25, 1938.
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E, EHRET
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2,134,077
FLUID TRANS-LATING APPARATUS
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Emu.’ EHRCT
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Patented Oct. , 2-5, 1938
2,134,071
UNITED STATES PATENT OFFICE
2,134,077
FLUID TBANSLATING APPARATUS
Emil Ehret, Forest Hills, Pa., assignor to Westing- I
house Electric & Manufacturing Company, East
> Pittsburgh, Pa., a corporation of Pennsylvania
Application August 23, 1934, Serial No. 741,125
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6 Claims. (Cl. 230-184)
My invention relates to ?uid translating ap~
H, through which the crank shaft I3 and the
paratus, more particularly to a multi-cylinder
discs I‘ are removable as anassembly. The
reciprocating compressor, and it has for an ob
ject to provide improved apparatus.
‘
A further object is to provide a construction
of ?uid translating apparatus wherein the cyl
inder head may be removed in a relatively simple
manner without disconnecting pipes connected to
inlet and outlet chambers in the cylinder head.
10
A further object is to provide ?uid translating
apparatus wherein auxiliary apparatus, such as
oil separator and muiiier, are incorporated in a
simple manner.
In accordance with my invention, I provide
15 a crank case member having inlet and outlet
headers; cylinder members in which the cylin
ders are formed and having inlet and outlet
passages communicating with said headers; and
cylinder heads having inlet and outlet chambers
20 providing communication between the cylinders
and the inlet and outlet passages.
The above and other objects are effected by
my invention as will be apparent from the fol
lowing description and claims taken in connec
25 tion with the accompanying drawings forming a
part of this application, in which:
Fig. 1 is a side view, partly in section and
partly in elevation, of a reciprocating compressor
embodying my invention;
.
Fig. 2 is a plan view of the compressor, with‘
certain parts removed, as seen on the line 11-41
of Fig. 1;
Fig. 3 is a vertical cross-section taken on the
line III-III of Figs. 1 and 2;
35
Fig. 4 is a horizontal section taken on the
line IV—-IV of Fig. 3, showing the oil separator
in the inlet header; and
Fig. 5 is a horizontal section taken on the
line V—V of Fig. 3, showing the mu?ler in the
40
discharge header.
Referring to the drawings in detail, I show a
reciprocating compressor ill comprising a plu
rality of cylinders disposed in a row and driven
by a motor H of any suitable type. The com
45 pressor includes a crank case H, the major por
tion of which, in the present embodiment is a
single casting. This casting has top, side, and
bottom wall portions which are integral with
each other, the side and bottom wall portions
50 closing substantially the entire sides and bot
tom of the crank case.
A crank shaft It is
mounted in the crankcase, being journalled in
bearings formed in discs 14 detachably secured
in the crankcase. An opening I5 is formed in
the crankcase at the end remote from the motor
opening I5 is closed by a cover plate I 5, which
carries a lubricant pump I1 driven by. the crank
shaft l3 through a key and slot connection l8. U!
The cover plate i6 also carries an oil ?lter 20
projecting, through an opening i9 into the lower
portion of the crankcase, which forms a lubri
cant reservoir.
According to the present invention, the cyl
inders are formed by separate cylinder members
2|, each of which, in the present embodiment,
forms two cylinders 22. Each cylinder member
is secured to the crankcase on a horizontal plane
of division designated 23, and has a ?ange 24 15
seating on the flat ?nished surface provided on
the crankcase along said plane 23, being secured
thereto by tap bolts 25. The crankcase is formed
with a circular opening 25 for each cylinder
member, through which the connecting rods 21
are extended. The latter connect pistons 28 in
the cylinders 22 to "the crank shaft I3, being
secured by bolts and nuts 28' to crank pins 29
between discs 30 of the crank shaft, which lat
ter are concentric with the axis of the crank
shaft.
'
Each cylinder member 2| is provided with a
cylinder head 3|, having an inlet or suction
chamber 32 and a discharge chamber 33 divided
by a partition 34, both chambers being common
to the two cylinders 22. A valve assembly 35 is
interposed between the cylinder member and the
cylinder head, and includes a suction valve 36
for each cylinder providing communication be
tween the suction chamber 32 and the cylinder,
and a discharge valve 31 for each cylinder which 35
permits flow of compressed refrigerant from the
cylinder into the discharge chamber 33. The cyl
inder head 3! is secured to the cylinder member
2| by means of bolts 38,_the valve assembly 35
being clamped between the cylinder head and
the cylinder member.
According to the present invention, the crank
case ‘is formed with an integral inlet or suction
header 39 extending along one side of the row
of cylinders. As shown in Figs. 3 and 4, an oil 45
separator 4| is disposed within the header 39.
The gaseous ?uid to be compressed, which is con
veyed through a suction conduit 39a and a shut
off valve 39b, enters the header through an in
let opening 42 and passes through the oil sep
arator II.
The oil separated from the vapor '
?ows downwardly by gravity through a passage
43 in the crankcase to the lubricant reservoir in
the bottom thereof. The header 39 is formed
2
3,184,077
with a connecting passage 44, .for each cylinder
member, extending upwardly and terminating
in the plane of division 23. The oil separator
4| is inserted through the end of the header 39
‘adjacent the motor It, which end is closed by a
cover plate 40. .
1
A discharge header 46 is also ‘formed integrally
with the crankcase on the opposite side of the
row of cylinders. It is formed with connecting
10 passages 46 extending to the plane of division
23, one passage 46 being provided for each cyl
inder member, and with an outlet opening 51.
A muilier 48 is provided within the discharge
header 46. ‘This mumer comprises a foraminated
tubular sheet metal member, rectangular in cross
section, as shown in Fig. 3. Strips of screen 6|v
are wound around the tubular member 49 ‘in
the spaces between adjacent passages 46. At the
passages 46, the adjacent strips of screen 6i
20 are spaced to provide a passage for the gaseous
?uid. Stacks of vertically disposed screens 62
and 63 are wedged in the discharge header 46
on opposite sides of the strips of screen 6|, the
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49 of the mu?ler 48, and outwardly through the
opening 41 of the discharge header, to the valve
46a and conduit 46b.
.
In disassemblingthe cy der head, it is only
necessary to remove the bolts 38, whereupon thev
cylinder head, and also the valve assembly 36,
may be removed without disconnecting any pipes
extending to the cylinder head or any other ?uid
inlet or outlet connections, which would other
wise be necessary, as in the prior constructions.
This is possible because the gaseous ?uid is ad
mitted and discharged through the plane ‘of di
vision between the valve assembly and'the cylin
ders. Furthermore, the cylinder members may
be likewise removed from the crankcase, by re 15
moving the tap bolts 26, without disengaging ad
screens 62 having recesses 54 adjacent the pas
25 sages 46, to provide additional passageway for
the gaseous ?uid to enter the interior of the
tubular member 48. The compressed ?uid enters
through the several passages 46, between adja
cent screens 6! into the interior of the tubular
30 member 49, then outwardly through the outlet
61, a shut-off valve 46a, and a conduit 66b to
’ the condenser (not shown). The header 46 has
ditional inlet or outlet connections. The con
necting rods 21 may then be disconnected from
the crank shaft by inserting a wrench through
the opening 26 in the crankcase to remove the
nuts 28'. The cover plate I6 is removed, and
the crank shaft 13, with the bearing discs l4
thereon, may then be withdrawn through'the
opening l6, after which the bearing discs may
be detached from the crank shaft.
From the above description, it will be seen
that I have provided a compressor construction,
for a plurality of cylinders, which may be dis
mantled without removing the crankcase or dis
turbing any pipe connections. The compressor
may be isolated from the remainder of the re
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80
frigerant circuit by closing the shut-oi! valves
and 46a.
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an open and adjacent the motor ll, through 39!)
A further advantage of the present construc
which the muiiier 48 may be inserted, and which tion is that a single inlet and outlet for the
entire group‘of cylinders~ is provided. The utili
35 is closed by ‘an end plate 60.
Each cylinder member 2| is‘ formed with an nation of inlet and discharge headers for the oil
inlet passage .66 which is common to the two separator and muiiier eliminates the necessity
cylinders 22. The lower end of the passage 66 for additional ‘space which would otherwise be
terminates in the plane of.division 23 and com
required and provides a more compact piece of
munioates with the passage 44 of the inlet header
40 39. The upper end of the passage 66 terminates apparatus.
The construction of the crankcase provides a
in a plane 66, which de?nes the upper surface maximum of unbroken or integral wall area and
of the cylinder member 2| and against which reduces to a minimum the number and length
the valve assembly 36 bears. The valve assembly of joints, thereby reducing the possibility of 46
36 is provided with an opening 61 registering
is with the passage 66 and providing communica
tion between the passage 66 and the inlet cham
ber v32 in the cylinder head.
’
‘The cylinder member 2! is further formed with
an outlet or discharge passage 68, also common
50 to the two cylinders 22 and disposed on the op
posite side of the cylinder member. The lower
end of the passage 68 terminates in the plane of
division 23, in registry with the passage 46. The
upper end of the passage 68 terminates in the
55 plane. 66, and the valve assembly 36 is formed
with an opening 68 providing communication be
tween the discharge chamber 33 and the pas
sage 68.-
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In operation, gaseous ?uid to be compressed,
from the conduit 36a and valve 381), enters the
inlet manifold through the inlet opening 42. Any
oil entrained in the gaseous ?uid, which is a
condition encountered particularly in the case
leakage.
‘
while I have shown my invention in but one
form, it will be obvious to those skilled in the
art that it is not so limited, but is susceptible
of various changes and modi?cations without de
parting from the spirit thereof, and I desire,
therefore, that only suchv limitations shall be
placed thereupon as are imposed by the prior art
or as are set forth in the appended claims.
What I claim is:
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.1. In a ?uid translating machine, the combi
nation of a crankcase member, a plurality of
cylinder members secured to said crankcase
member and arranged in a row and each having
a cylinder formed therein, said crank case mem
ber having an inlet header on one side of said
row and an outlet header on the other‘ side there
of,,both headers being formed integrally with
the‘orankcase member, each of said cylinder
of- refrigerating compressors, is separated by the members having inlet and outlet passages formed
65 oil separator 4| and ?ows by gravity through the integrally therewith and communicating with
said inlet and outlet headers, vrespectively, a cyl
passage 43 to the bottom of. the crankcase. The . inder head for each cylinder member having in
gaseous ?uid ?ows upwardly through the several
passages 44, the passages 66, the openings 61, the
inlet chambers 32 and the inlet valves 36 into
70 the cylinders 22. Upon upward movement of
the pistons 28, the gas is compressed and dis
charged through the discharge valves 31, the dis
charge chambers 33, the openings 69, the pas;
75. sages 68 and 46, through the tubular member
let and outlet chambers providing communica
tion between said cylinder and said inlet and out
let passages, respectively, and ‘valve means for
controlling the ?ow of ?uid between each cylin
der and the associated inlet and outlet passages.
2. In a compressor, the combination of cylin
der means having formed therein -a plurality of
2,184,077
pairs of cylinders, said cylinders being arranged
in a row; said cylinder means having formed
therein an inlet passage adjacent and common to
each pair of cylinders and terminating in aline-_
_ ment with the ends of the cylinders and an out
let passage adjacent and commonto the pair of
cylinders and terminating in alinement with the
ends of the cylinders; a separate cylinder head
' for each pair of cylinders, each head having an
10 inlet chamber communicating with both cylin
ders and said common inlet passage, and an out
let chamber communicating with both cylinders
and said common outlet passage and having a
partition between the inlet and outlet chambers
15 extending across each cylinder; valve means
clamped between each cylinder head and the-as~
sociated cylinders and including an inlet valve
controlling communication between the inlet
chamber and each cylinder and an outlet valve
20 controlling ?ow between each cylinder and said
outlet chamber; means clamped between each
cylinder head and the cylinder means providing
communication between the inlet chamber and
the common inlet passage and communication
26 between the outlet chamber and the common
outlet passage; and means providing communi
cation between the several inlet passages and a
common inlet therefor, and communication be
tween the several outlet passages and a common
80 outlet therefor.
3. In a compressor, the'combination of cylin
der means having formed therein a plurality 01'
pairs of cylinders, said cylinders being arranged
in a row; said cylinder means having formed
$5 therein an inlet passage adjacent and common
to each pair of cylinders and terminating in
alignment with the ends of the cylinders and an
outlet passage adjacent and common to the pair
of cylinders and terminating in alignment with
40 the ends of the cylinder; a separate cylinder head
for each pair of cylinders, each head having an
inlet chamber communicating with both cylin
3
each head having an inlet chamber communi
cating with both cylinders and an outlet cham
ber communicating with both cylinders and said
common outlet passage and having a partition
between the inlet and outlet chambers extending
across each cylinder; valve means clamped be
tween each cylinder head and the associated cyl
inders and including an inlet valve controlling
communication between the inlet chamber and
each cylinder and an outlet valve controlling ?ow 10
between each cylinder and said outlet chamber;
means clamped between each cylinder head and
the cylinder means providing communication'be
tween the outlet chamber and the common out
let passage; and means providing communica 15
tion between the several outletpassages and a
common outlet therefor.
5. In a compressor, the combination of cylin
der means having formed therein a plurality of
pairs of cylinders, said cylinders being arranged 20
in a row; said cylinder means having formed
therein an outlet passage adjacent and common
to each pair of cylinders and terminating in
alignment with the ends of the cylinders and also
having inlet passages formed therein; a sepa 25
rate cylinder head for each pair of cylinders,
each head having an outlet chamber communi
cating with both cylinders and said common out
let passage; valve means clamped between each
cylinder head and‘ the associated cylinders and 30
including an outlet valve controlling ?ow be
tween each cylinder and 'said outlet chamber;
valve means controlling flow between each cylin
der and an inlet passage; means clamped be
tween each cylinder head and the cylinder means 35
providing communication between the outlet
chamber and the common outlet passage; and
means providing communication between the
several outlet passages and a common outlet
therefor.
6. In a compressor, the combination of cylin
der means having formed therein a plurality oi‘
40
ders and said common inlet passage, and an out
pairs of cylinders, said cylinders being arranged
let chamber communicating with both cylinders. in
a row; said cylinder means having formed
45 and said common outlet passage and having a
therein an inlet passage adjacent and common
partition between the inlet and outlet chambers to each pair of cylinders and terminating in 45
extending across each cylinder; valve means alignment with the ends of the cylinders, a sep
clamped between each cylinder head and the as
arate cylinder head for each pair of cylinders,
sociated ‘cylinders and including an inlet valve each cylinder head having an inlet chamber com
50 controlling communication between the inlet municating with both cylinders and said com
chamber and each cylinder and an outlet valve mon inlet passage and an outlet chamber com 50
controlling ?ow between each cylinder and said municating
with both cylinders and having a
outlet chamber‘; and means clamped between partition between the inlet and outlet chambers
each cylinder head and the cylinder means pro
extending across each cylinder; valve means
55 viding communication between the inlet cham
clamped between each cylinder head and the as
ber and the common inlet passage and communi
sociated cylinders and including an inlet valve 55
cation between the outlet chamber and the com
controlling communication between the inlet
mon outlet passage.
4. In a compressor, the combination of cylin
60 der means having formed therein a plurality of
pairs of cylinders, said cylinders being arranged
in a row; said cylinder means having formed
_ therein an outlet passage adjacent and common
to each pair of cylinders and terminating in
alignment with the ends oi‘ the cylinders; a sepa
rate cylinder head for each pair of cylinders,
chamber and each cylinder; means clamped be
tween each cylinder head and cylinder means
providing communication between the inlet
chamber and the common inlet passage; and 60
means providing communication between the
several inlet passages and a common inlet there
tor.
EMIL EHREI‘.
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