U.S. patent number 3,867,066 [Application Number 05/384,450] was granted by the patent office on 1975-02-18 for gas compressor.
This patent grant is currently assigned to Ingersoll-Rand Company. Invention is credited to Fred Canova, Hanns Hornschuch, Leroy M. Krouse.
United States Patent |
3,867,066 |
Canova , et al. |
February 18, 1975 |
**Please see images for:
( Certificate of Correction ) ** |
GAS COMPRESSOR
Abstract
The arrangement is described in use in a gas compressor which is
of the axial flow type, having a plurality of stages of
compression, and an overhung rotor. The arrangement comprises vane
mounting rings, for emplacement within a cylindrical housing, in
which the stator vanes are pinned. Further, each vane is set in an
elastomer for dampening or to accommodate for vibratory movement
thereof. A housing and frame enclose and support the working
elements of the compressor, the elements being so supported and
enclosed as to allow for relative movements of the housing without
causing distortion of said elements.
Inventors: |
Canova; Fred (Phillipsburg,
PA), Krouse; Leroy M. (Easton, PA), Hornschuch; Hanns
(Easton, PA) |
Assignee: |
Ingersoll-Rand Company
(Woodcliff Lake, NJ)
|
Family
ID: |
26928964 |
Appl.
No.: |
05/384,450 |
Filed: |
August 1, 1973 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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235501 |
Mar 17, 1972 |
3773430 |
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Current U.S.
Class: |
415/209.3;
416/500 |
Current CPC
Class: |
F01D
5/16 (20130101); F04D 19/02 (20130101); F04D
29/322 (20130101); F01D 9/042 (20130101); F04D
29/668 (20130101); F01D 5/30 (20130101); Y10S
416/50 (20130101) |
Current International
Class: |
F04D
29/32 (20060101); F04D 29/66 (20060101); F01D
9/04 (20060101); F04D 19/02 (20060101); F01D
5/00 (20060101); F01D 5/14 (20060101); F01D
5/30 (20060101); F01D 5/16 (20060101); F04D
19/00 (20060101); F01d 001/02 (); F01d 005/00 ();
F01d 025/04 () |
Field of
Search: |
;416/500,134,135,140,194
;415/216,217,218 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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713,187 |
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Nov 1941 |
|
DD |
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248,891 |
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Mar 1970 |
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SU |
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148,304 |
|
Sep 1952 |
|
AU |
|
Primary Examiner: Raduazo; Henry F.
Attorney, Agent or Firm: Murphy; Bernard J.
Parent Case Text
This is a division of application Ser. No. 235,501; filed Mar. 17,
1972 now U.S. Pat. No. 3,773,430.
Claims
1. An arrangement for mounting stator vanes in a stator housing,
for use in a gas compressor, comprising:
a vane mounting ring, said ring having a recess formed therein for
receiving a vane therewithin;
a vane having an end thereof disposed within said recess, with a
pin therethrough securing said vane end to said ring and in said
recess; and
resilient means enveloping said vane end in said recess and
dampening said
2. An arrangement, according to claim 1, wherein: said resilient
means
3. An arrangement, according to claim 2, wherein: said elastomer
wholly envelops said vane end and fills said recess.
Description
This invention pertains to stator vane mounting arrangements for
use in gas compressors, and in particular to gas compressors of the
axial flow type where stator vanes are subject to vibration-induced
failures a plurality of stages of compression.
It is an object of this invention to set forth a stator vane
mounting arrangement which especially accommodates for vibratory
movement of stator vanes. Especially it is an object of this
invention to teach means for dampening vibratory movement of stator
vanes.
Another object of this invention is to set forth an arrangement for
mounting stator vanes in a stator housing, for use in a gas
compressor, comprising a vane mounting ring, said ring having a
recess formed therein for receiving a vane therewithin; a vane
having an end thereof disposed within said recess; pin means
securing said vane end in said recess; and resilient means
enveloping said vane end and dampening said vane against
vibration.
Further objects and features of this invention will become more
apparent by reference to the following description taken in
conjunction with the accompanying figures, in which:
FIG. 1 is an axial view, partly in cross-section, of an arrangement
for mounting stator vanes in use in a embodiment of a gas
compressor, according to the invention;
FIG. 2 is an enlarged view of a detailed area of FIG. 1; and
FIGS. 3 and 4 are side and plan views depicting the stator vane and
mounting ring arrangements.
As shown in the figures, the novel gas compressor 10 comprises a
housing 12 having a base 14 for supporting the housing thereupon. A
pair of oppositely disposed gas inlet flanges 16 are mounted to
each side of the housing, the flanges defining inlet ports 18 which
open on a chamber 20 defined within the housing. At the axial
outlet end of the compressor is mounted a gas discharge flange 22
having an outlet port 24 formed therein.
Upstream of the inlet end are carried coupling means and a bearing
housing assembly (not shown), the two being supported in a casing
26 which is fixed to the compressor base 14. An over-hung, axially
extending rotor and shaft assembly 28 is rotatably supported at but
one axial end in the bearing housing, for rotary, gas-compressing
movement within a compression chamber 30, and includes pluralities
of radially disposed blades 32. A vaned stator 34, concentrically
disposed about the rotor and shaft assembly, is mountedly supported
within the compressor housing, by means of a cylindrical housing 36
which carries vane mounting rings 38 therewithin. The stator 34
comprises a plurality of such vane mounting rings in juxtaposition,
each of which has fixed therein a plurality of vanes 40. All of the
vanes 40 are of uniform length; however, the stator mounting rings
38 are of uniformly varying cross-section, from the inlet end to
the outlet end of the compression chamber so that, toward the
outlet end, progressively less of the vanes 40 protrudes into the
compression chamber 30. Each vane 40 is pinned into its respective
mounting ring 38 and, further, each vane head 42 is set in an
elastomer 44 for the purpose of damping vane vibration.
The housing base 14 comprises a vertical plate 46 which has
passageways (not shown) formed therein for the admittance of
ambient atmosphere as a sealant and also for introducing
lubricating oil. Also, the lubricating oil is conducted by drilled
passageway 48 from annular seals 50,50a set about the shaft of the
rotor and shaft assembly 28 and subsequently drains into the
bearing housing assembly.
The rotor and shaft assembly 28 comprises a plurality of
juxtapositioned blade mounting rings 52, each of the rings having a
plurality of the blades 32 mounted therein and radially extending
away therefrom. Each blade 32 at the head end thereof has a forked
extension 54 which is bored through to receive a pin 56. Further,
each blade mounting ring has a plurality of boreholes 58 formed
therethrough for retaining opposite ends of the blade-retaining
pins. Each blade, at the head end thereof, has a laterally
extending tang 60 which protrudes into a complementary, interfacing
recess 62 provided therefor in an adjacent blade head end. Finally,
the forked extensions 54 of adjacent blades have cooperative,
arcuate cut-outs 64 formed therein with an elastomeric insert 66
therebetween. The pinning of the forked extensions, and the
elastomeric inserts, cooperate to allow the blades to swing through
a small arc to accommodate for vibration.
The rotor shaft has a hollow extension 68 about which the rotor
blade mounting rings 52 are mounted.
At the outlet end of the gas compressor is disposed a diffuser
shell 72 which is open at both, opposite, ends. One end is in
direct open communication with the outlet end of the compression
chamber 30, and the end opposite opens directly onto the outlet
port 24. One end, the outlet end of this diffuser shell, is
retained by a circumferential shoulder 74 formed within the outlet
flange and about the outlet port. The diffuser shell outlet end and
the circumferential shoulder have a compliant, sealant medium 76
therebetween. Further, the compressor housing has a radially and
inwardly extending weldment 78 which abuttingly receives a radial
ring 80 formed about and extending from the diffuser shell, said
weldment and ring having an O-ring seal 82 therebetween.
Another ring 82 is welded within the outlet end of the housing,
intermediate the weldment 78 and the outlet end of the diffuser
shell 72, to present a flat-surfaced annulus for slidably
supporting the diffuser shell therewithin. Four ribs 86 (only one
is shown), equally spaced therebetween about the rotor axis, are
fixed at either ends thereof to the annulus of ring 84 and the
weldment 78 to provide further support for the diffuser shell
therewithin and for the outlet end of the compressor.
The blade mounting rings 52 of the rotor, and the vane mounting
rings 38 of the stator as well, are each independently replaceable.
The innermost blade mounting ring (i.e., the one nearest the inlet
end of the compression chamber) is set up against a circumferential
shoulder 88 formed in the outer surface of the rotor shaft
extension 68. Successive adjacently-disposed blade mounting rings
52 are set against the innermost one, along the shaft axis. The
last or outermost blade mounting ring is secured on the rotor shaft
extension by a retainer plate 90 bolted (by means not shown) to the
shaft extension.
The vane mounting rings 38 of the stator, similarly are set one
against the one adjacent thereto, with the innermost one set
against a radial shoulder 92 formed in a cylindrical stator housing
36. The outermost vane mounting ring is secured in position by
means of a bi-stepped retainer ring 96. One step 98 of the retainer
ring abuttingly receives the outlet end of the stator housing 94,
and the retainer ring is secured to said stator housing thereat.
The other step 100 of the retainer ring, being disposed on a face
of the ring opposite the first-mentioned step, abuttingly receives
the inlet end of the diffuser shell 72. O-ring seals are disposed
in both steps to fluid seal the joints formed thereat with the
abutting components.
The novel stator vane mounting arrangement herein described in
conncation with a compressor, due to the independent replaceability
of the vane mounting rings 38, renders maintenance and repair easy,
and accommodates a facile re-rating of the compressor. Simply by
replacing given outermost mounting rings with dummy rings or
spacers, or by wholly substituting differently-dimensioned and/or
configured vanes -- in replacement mounting rings, -- the
performance of the compressor can be altered.
While we have described our invention in connection with a specific
embodiment thereof, it is to be clearly understood that this is
done only by way of example and not as a limitation to the scope of
our invention as set forth in the objects thereof and in the
appended claims.
* * * * *