US3874814A - Closure key apparatus - Google Patents

Closure key apparatus Download PDF

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Publication number
US3874814A
US3874814A US458148A US45814874A US3874814A US 3874814 A US3874814 A US 3874814A US 458148 A US458148 A US 458148A US 45814874 A US45814874 A US 45814874A US 3874814 A US3874814 A US 3874814A
Authority
US
United States
Prior art keywords
key
casing
shear key
end wall
wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US458148A
Other languages
English (en)
Inventor
Alexander A Carroll
Donald P Ravicchio
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Elliott Turbomachinery Co Inc
Original Assignee
Carrier Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carrier Corp filed Critical Carrier Corp
Priority to US458148A priority Critical patent/US3874814A/en
Priority to GB439/75A priority patent/GB1500181A/en
Priority to CA217,472A priority patent/CA1009153A/en
Priority to IT19252/75A priority patent/IT1028354B/it
Priority to NL7500630A priority patent/NL7500630A/xx
Priority to CH68175A priority patent/CH597505A5/xx
Priority to DE2504089A priority patent/DE2504089C3/de
Priority to JP3287175A priority patent/JPS5434167B2/ja
Application granted granted Critical
Publication of US3874814A publication Critical patent/US3874814A/en
Priority to FR7510400A priority patent/FR2266818B1/fr
Assigned to ELLIOTT TURBOMACHINERY CO., INC. reassignment ELLIOTT TURBOMACHINERY CO., INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CARRIER CORPORATION, A CORP OF DEL.
Assigned to FIRST NATIONAL BANK OF CHICAGO, THE reassignment FIRST NATIONAL BANK OF CHICAGO, THE LICENSE (SEE DOCUMENT FOR DETAILS). Assignors: ELLIOT TURBOMACHINERY CO., INC.
Assigned to CONTINENTAL BANK N.A. reassignment CONTINENTAL BANK N.A. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ELLIOTT TURBOMACHINERY CO., INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/10—Centrifugal pumps for compressing or evacuating
    • F04D17/12—Multi-stage pumps
    • F04D17/122—Multi-stage pumps the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors
    • F04D17/125—Multi-stage pumps the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors the casing being vertically split
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F01D25/26—Double casings; Measures against temperature strain in casings
    • F01D25/265—Vertically split casings; Clamping arrangements therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J13/00—Covers or similar closure members for pressure vessels in general
    • F16J13/02—Detachable closure members; Means for tightening closures
    • F16J13/10—Detachable closure members; Means for tightening closures attached by means of a divided ring
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/20—Clamps
    • Y10T292/205—Ring

Definitions

  • ABSTRACT A simple key assembly for supporting an end wall structure within a rotary machine such as a turbine or a compressor.
  • a shear key is interposed between the casing of the machine and an end wall closure carried internal the casing.
  • a portion of the shear key is seated within an internal groove formed within the casing and a second portion thereof seated within a recessed shoulder formed in the end wall.
  • a support key is mounted beneath the shear key within the end wall recess which serves to translate radial forces from the wall to the shear key.
  • a pair of raised moment control pads are mounted on the casing contacting surfaces of the shear key, the pads being strategically located in relation to the center of gravity of the shear key to offset the load induced bending moments exerted thereon by the end wall and the support key.
  • This invention relates to a closure key device for sup porting the end wall of a pressure vessel relatively immobile when placed under load.
  • a relatively simple key structure including a shear key and a support key.
  • a portion ofthe shear key is seated within a groove formed in the interior surface of the pressure vessel casing while a second portion is seated within a recessed shoulder formed in the end wall closure structure.
  • the support key is positioned beneath the shear key within the recessed shoulder and serves to support the shear key in assembly.
  • a pair of raised moment control pads are provided upon the casing contacting surfaces ofthe shear key which are strategically located to substantially offset the load induced bending moments acting upon the shear key to prevent the closure wall from shifting in an axial direction.
  • FIG. 1 is a partial sectional view of a rotary machine incorporating a key assembly embodying the teachings of the present invention
  • FIG. 2 is a reduced sectional view taken along lines 22 in FIG. 1 further illustrating the structural arrangement of the key assembly embodying the teachings of the present invention.
  • FIG. 3 is an enlarged exploded view showing the shear key and the support key making up the closure key assembly further illustrating the load forces acting thereon.
  • the rotary machine illustrated in FIG. 1 is what is generally referred to as a barrel type compressor.
  • the machine is fabricated of a relatively heavy cylindrical outer casing 11 having an axially aligned cylindrical hole 12 bored therein.
  • a second cylindrical casing 13 is mounted within the bore of the main outer casing and has secured thereto the stationary components of the machine. These include a series of diaphragms, some of which are indicated at 14, 15 and 16 in FIG. 1.
  • the particular compressor illustrated is of the multi-stage, twosection type, having an impeller 17 located in the first stage of the first section and a second impeller 19 lo-, cated in the first stage of the second section. As shown in FIG.
  • the two impellers are mounted so as to face in opposite directions whereby the stages in the first section and the stages in the second section are aligned in a back-to-back relationship. By so opposing the stages of each section in the manner illustrated, the thrust forces exerted upon the rotor shaft 20 are minimized.
  • the last stage of the first section is arranged to discharge, via a diffuser passage and transfer crossover device (not shown), into the inlet area of the second stage between the diaphragms 14 and 15.
  • a diffuser passage and transfer crossover device (not shown)
  • the machine impellers are secured to the shaft 20 and the shaft, in turn, is journaled for rotation within the end walls of the machine.
  • the left-hand end of the shaft is supported within a bearing structure 22 mounted in a horizontal wall which is an integral part of the main machine casing 11.
  • the opposite end of the shaft is supported within a bearing structure 22 mounted within an independent end wall closure 26.
  • the inner casing 13 terminates some distance inwardly from the open end of the outer casing 11.
  • a key assembly, generally referenced 35, is interposed between the end wall closure structure 26 and the machine casing 11 as illustrated in FIG. 1.
  • the key assembly is made up of a first segmented shear key 39 and a support key 40.
  • an annular shaped recessed shoulder 27 is formed in the end wall closure 26 having a radially extending rear wall 36 which penetrates the outer periphery thereof and an axially extending bottom wall 37 which is perpendicular to the rear wall and penetrates the front face of the closure.
  • the rear wall 36 of the recess shoulder is positioned between the vertical planes described by the two radially extended walls 30 and 31 of groove 28 in casing 11.
  • the shear key is mounted within the groove and, as will be explained in greater detail below, is seated against the end wall 30 and bottom surface 32 of the casing groove.
  • the body of the shear key extends downwardly into the casing opening so that the inner face of the key is in physical contact with at least a portion of the rear wall of the recessed shoulder. Sufficient contact area is provided between the rear wall of the shoulder and the inner face of the shear key to withstand the stresses developed, within allowable limits, when a machine is operating under designed load conditions.
  • a support key 40 is interposed between the bottom surface of the shear key and the axially extended bottom wall of the recessed shoulder.
  • the support key is an annular ring having a rectangular cross-sectional ge ometry which complements the bottom portion of the shoulder.
  • the shear key is made of four distinct segments 50, 51, 52 and 53, to facilitate its insertion into the groove.
  • the end face of each segment is arranged so that three axially aligned joints 56, 57 and 58 and one radially aligned joint 59 are established in assembly.
  • Each segment face making up a joint is accurately machined whereby the segments coact to form a single unitized structure when they are seated within the casing groove.
  • the support key or ring is passed into the end wall recess and the end wall moved laterally toward the casing opening so as to load the shear key in contact against both the rear wall of the closure and the casing groove. When so positioned, the support key is locked in place by means of cap screws 49 to prevent further movement or misalignment of the assembly.
  • the support ring further serves to translate radially acting forces from the closure wall to the shear key.
  • the axial width of the support key is such that the resultant radial forces acting upon the shear key are to the left of the center of gravity 65 (FIG. 3) of the shear key as viewed in FIG. 1.
  • the contact area between the rear wall of the recessed shoulder and the shear key is such that the resultant axial forces acting upon the key are below the center of gravity of the key.
  • the upper surface and outer face of the shear key are both provided with raised moment control pads 67 and 68, respectively.
  • the pads are arranged to seat against the bottom surface and outer face of the casing groove and are strategically positioned to produce moments in the key which are substantially equal, but opposite to, those moments pro prised by forces F and F As a result, the bending moments acting about the center of gravity of the shear key are substantially negated thus loading the key in compression against the casing of the machine.
  • each pad is located so that the moment (F X d is equal to the moment (F, X 41,).
  • moment pad 68 is strategically located so that moment (F X d is equal to the moment (F, X d
  • a shear key seated within the groove and extending f inwardly in a radial direction whereby a portion of the key extends into the opening within the casing, a recessed shoulder formed in the outer periphery of the end wall having a radially extending back wall positioned between the inner and outer end walls of said groove in the casing with the back wall of the shoulder being in contactwith the inner face portion of the shear key extending into the casing, opening, and an axially extending wall perpendicu' lar to said back wall that penetrates the outer face of said end closure,
  • ment control pads are of a predetermined area whereby the casing induced moments produced in the shear key are substantially opposite and equal to those induced by the end wall closure.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
US458148A 1974-04-05 1974-04-05 Closure key apparatus Expired - Lifetime US3874814A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US458148A US3874814A (en) 1974-04-05 1974-04-05 Closure key apparatus
GB439/75A GB1500181A (en) 1974-04-05 1975-01-06 Closure key apparatus for pressure vessels
CA217,472A CA1009153A (en) 1974-04-05 1975-01-07 Closure key apparatus
IT19252/75A IT1028354B (it) 1974-04-05 1975-01-14 Gruppo a chiave di chiusura di tipo perfezionato particolarmente per contenitori a pressione
NL7500630A NL7500630A (nl) 1974-04-05 1975-01-20 Sluitspie-inrichting.
CH68175A CH597505A5 (enrdf_load_stackoverflow) 1974-04-05 1975-01-22
DE2504089A DE2504089C3 (de) 1974-04-05 1975-01-31 Verschluß zur Verriegelung eines Deckels
JP3287175A JPS5434167B2 (enrdf_load_stackoverflow) 1974-04-05 1975-03-18
FR7510400A FR2266818B1 (enrdf_load_stackoverflow) 1974-04-05 1975-04-03

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US458148A US3874814A (en) 1974-04-05 1974-04-05 Closure key apparatus

Publications (1)

Publication Number Publication Date
US3874814A true US3874814A (en) 1975-04-01

Family

ID=23819565

Family Applications (1)

Application Number Title Priority Date Filing Date
US458148A Expired - Lifetime US3874814A (en) 1974-04-05 1974-04-05 Closure key apparatus

Country Status (9)

Country Link
US (1) US3874814A (enrdf_load_stackoverflow)
JP (1) JPS5434167B2 (enrdf_load_stackoverflow)
CA (1) CA1009153A (enrdf_load_stackoverflow)
CH (1) CH597505A5 (enrdf_load_stackoverflow)
DE (1) DE2504089C3 (enrdf_load_stackoverflow)
FR (1) FR2266818B1 (enrdf_load_stackoverflow)
GB (1) GB1500181A (enrdf_load_stackoverflow)
IT (1) IT1028354B (enrdf_load_stackoverflow)
NL (1) NL7500630A (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3212982A1 (de) * 1981-05-05 1982-11-25 Borg-Warner Corp., 60604 Chicago, Ill. Pumpendeckel
US4383799A (en) * 1980-04-07 1983-05-17 Toyota Iidosha Kogyo Kabushiki Kaisha Ring and groove contraction for assembling a turbocharger
US4701103A (en) * 1984-03-19 1987-10-20 Sulzer Brothers Limited Turbomachine housing
US4789077A (en) * 1988-02-24 1988-12-06 Public Service Electric & Gas Company Closure apparatus for a high pressure vessel
CH694865A5 (de) * 2000-10-27 2005-08-15 Babco Gmbh Zylindrisches Kunststoffgehaeuse.
EP1860326A1 (de) * 2006-05-26 2007-11-28 Siemens Aktiengesellschaft Mehrstufiger Turboverdichter
US7850427B2 (en) 2005-11-30 2010-12-14 Dresser-Rand Company Closure device for a turbomachine casing
EP2679825A4 (en) * 2011-02-25 2018-01-17 Mitsubishi Heavy Industries Compressor Corporation Compressor
EP3421816A4 (en) * 2016-03-28 2019-04-03 Mitsubishi Heavy Industries Compressor Corporation CENTRIFUGAL COMPRESSOR
US10393148B2 (en) 2013-10-25 2019-08-27 Nuovo Pignone Srl Barrel turbo-machine comprising retracting shear
US10876544B2 (en) * 2017-11-09 2020-12-29 Mitsubishi Heavy Industries Compressor Corporation Rotary machine and diaphragm
WO2023086775A1 (en) * 2021-11-11 2023-05-19 Progress Rail Locomotive Inc. Compressor joint

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5463412A (en) * 1977-10-28 1979-05-22 Mitsui Eng & Shipbuild Co Ltd End cover fastening construction for barrel type casings
US4380405A (en) * 1980-01-07 1983-04-19 Hitachi, Ltd. Head flange mounting device for turbo-machine
DE3230457C2 (de) * 1982-08-16 1984-09-20 Skw Trostberg Ag, 8223 Trostberg Abdichtung für einen Hochdruck-Behälter mit Innenverschluß
US7036674B2 (en) * 2001-11-05 2006-05-02 Robbins & Myers Energy Systems, L.P. Closure for a pressure vessel and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2296710A (en) * 1938-04-23 1942-09-22 Westinghouse Electric & Mfg Co High pressure sealing head
US2690275A (en) * 1952-03-22 1954-09-28 American Locomotive Co High-pressure closure
US2711266A (en) * 1952-03-22 1955-06-21 American Locomotive Co High pressure closures
US3437230A (en) * 1967-11-29 1969-04-08 Steel Construction & Eng Co No Hydraulic cylinders

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5238060B2 (enrdf_load_stackoverflow) * 1972-08-15 1977-09-27

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2296710A (en) * 1938-04-23 1942-09-22 Westinghouse Electric & Mfg Co High pressure sealing head
US2690275A (en) * 1952-03-22 1954-09-28 American Locomotive Co High-pressure closure
US2711266A (en) * 1952-03-22 1955-06-21 American Locomotive Co High pressure closures
US3437230A (en) * 1967-11-29 1969-04-08 Steel Construction & Eng Co No Hydraulic cylinders

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4383799A (en) * 1980-04-07 1983-05-17 Toyota Iidosha Kogyo Kabushiki Kaisha Ring and groove contraction for assembling a turbocharger
DE3212982A1 (de) * 1981-05-05 1982-11-25 Borg-Warner Corp., 60604 Chicago, Ill. Pumpendeckel
US4701103A (en) * 1984-03-19 1987-10-20 Sulzer Brothers Limited Turbomachine housing
US4789077A (en) * 1988-02-24 1988-12-06 Public Service Electric & Gas Company Closure apparatus for a high pressure vessel
CH694865A5 (de) * 2000-10-27 2005-08-15 Babco Gmbh Zylindrisches Kunststoffgehaeuse.
US7850427B2 (en) 2005-11-30 2010-12-14 Dresser-Rand Company Closure device for a turbomachine casing
WO2007137959A1 (de) * 2006-05-26 2007-12-06 Siemens Aktiengesellschaft Mehrstufiger turboverdichter
US20090175717A1 (en) * 2006-05-26 2009-07-09 Udo Fingerhut Multistage Turbocompressor
EP1860326A1 (de) * 2006-05-26 2007-11-28 Siemens Aktiengesellschaft Mehrstufiger Turboverdichter
US8133021B2 (en) 2006-05-26 2012-03-13 Siemens Aktiengesellschaft Multistage turbocompressor
CN101454578B (zh) * 2006-05-26 2012-03-14 西门子公司 多级涡轮压缩机
EP2679825A4 (en) * 2011-02-25 2018-01-17 Mitsubishi Heavy Industries Compressor Corporation Compressor
US10393148B2 (en) 2013-10-25 2019-08-27 Nuovo Pignone Srl Barrel turbo-machine comprising retracting shear
EP3421816A4 (en) * 2016-03-28 2019-04-03 Mitsubishi Heavy Industries Compressor Corporation CENTRIFUGAL COMPRESSOR
US10876546B2 (en) 2016-03-28 2020-12-29 Mitsubishi Heavy Industries Compressor Corporation Centrifugal compressor
US10876544B2 (en) * 2017-11-09 2020-12-29 Mitsubishi Heavy Industries Compressor Corporation Rotary machine and diaphragm
WO2023086775A1 (en) * 2021-11-11 2023-05-19 Progress Rail Locomotive Inc. Compressor joint

Also Published As

Publication number Publication date
NL7500630A (nl) 1975-10-07
DE2504089A1 (de) 1975-10-09
DE2504089C3 (de) 1978-06-29
JPS50134204A (enrdf_load_stackoverflow) 1975-10-24
IT1028354B (it) 1979-01-30
DE2504089B2 (de) 1977-11-17
GB1500181A (en) 1978-02-08
CA1009153A (en) 1977-04-26
CH597505A5 (enrdf_load_stackoverflow) 1978-04-14
FR2266818A1 (enrdf_load_stackoverflow) 1975-10-31
FR2266818B1 (enrdf_load_stackoverflow) 1979-05-04
JPS5434167B2 (enrdf_load_stackoverflow) 1979-10-25

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ELLIOTT TURBOMACHINERY CO., INC., A CORP OF DELAWA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. SUBJECT TO LICENSE RECITED.;ASSIGNOR:CARRIER CORPORATION, A CORP OF DEL.;REEL/FRAME:004499/0922

Effective date: 19851220

AS Assignment

Owner name: FIRST NATIONAL BANK OF CHICAGO, THE, ONE FIRST NAT

Free format text: LICENSE;ASSIGNOR:ELLIOT TURBOMACHINERY CO., INC.;REEL/FRAME:004940/0562

Effective date: 19871109

Owner name: FIRST NATIONAL BANK OF CHICAGO, THE,ILLINOIS

Free format text: LICENSE;ASSIGNOR:ELLIOT TURBOMACHINERY CO., INC.;REEL/FRAME:004940/0562

Effective date: 19871109

AS Assignment

Owner name: CONTINENTAL BANK N.A.

Free format text: SECURITY INTEREST;ASSIGNOR:ELLIOTT TURBOMACHINERY CO., INC.;REEL/FRAME:005258/0092

Effective date: 19891212