US3865504A - Axial compressor - Google Patents

Axial compressor Download PDF

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Publication number
US3865504A
US3865504A US390896A US39089673A US3865504A US 3865504 A US3865504 A US 3865504A US 390896 A US390896 A US 390896A US 39089673 A US39089673 A US 39089673A US 3865504 A US3865504 A US 3865504A
Authority
US
United States
Prior art keywords
casing
rotor
structural part
stator blade
blade support
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
US390896A
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English (en)
Inventor
Hans Benz
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.)
Brown Boveri Sulzer Turbomaschinen AG
Sulzer Escher Wyss AG
Original Assignee
Brown Boveri Sulzer Turbomaschinen AG
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 Brown Boveri Sulzer Turbomaschinen AG filed Critical Brown Boveri Sulzer Turbomaschinen AG
Application granted granted Critical
Publication of US3865504A publication Critical patent/US3865504A/en
Assigned to SULZER-ESCHER WYSS AG, A CORP OF SWITZERLAND reassignment SULZER-ESCHER WYSS AG, A CORP OF SWITZERLAND ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BROWN BOVERI-SULZER TURBOMACHINERY LIMITED, JAKOB WYDLER, LIQUIDATOR
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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/102—Shaft sealings especially adapted for elastic fluid pumps

Definitions

  • This invention relates to an axial compressor and particularly to the centering of a rotor within a casing of an axial compressor.
  • Axial compressors have been known to have a stator blade support which is radially centered in a casing as well as a rotor which is centered with respect to the stator blade support be means of bearings.
  • the stator blade support of some axial compressors has not been mounted so as to be adjustable with respect to the casing but has merely been mounted so as to be axially slidable under thermal expansion forces.
  • This measure requires the rotor to be centered with respect to the stator blade support, for example by displacement of the blocks in which the rotor bearings are mounted, fine adjustment being performed in the radial bearings themselves.
  • Compressors constructed in this manner frequently give rise to difficulties relating to the adjustment of the usually used labyrinth seals between the casing and the rotor since these seals require closer tolerances than those tolerances required by the blade clearance of the rotor blades.
  • the invention provides an axial compressor of the type having a casing, stator blade support radially centered within the casing, rotor and a labyrinth sealing means between the rotor and casing with a structural part to simplify the making of an adjustment in the sealing means.
  • This structural part is mounted on the easing in an adjustable manner and has an inner annular surface surrounding the rotor in which a plurality of annular grooves are formed to cooperate with a plurality of radially directed rings on the rotor to define the labyrinth sealing means.
  • the structural part is disposed to encircle one end of the rotor while a duplicate structural part envelops an opposite end of the rotor.
  • the respective structural part is manuevered within the casing to re-orient the annular grooves to achieve a centered relationship with the radial rings on the rotor after the rotor is put in place.
  • means such as a plurality of shim blocks are disposed between the structural part and the casing to center the structural part radially with respect to the rotor with at least one shim between each shim block and at least one of the structural part and casing.
  • the shims can be of varying thickness, and it is advantageous if four shim blocks are distributed over the external circumference by screw-mounting on the structural parts. Since an axial adjustment of the labyrinth sealing means is frequently required in addition to the radial adjustment, shims can be provided between the structural parts and the casing to adjust the axial relation of the structural parts to the casing.
  • FIG. I diagrammatically illustrates a vertical sectional view through an axial compressor according to the invention
  • FIG. 2 illustrates to an enlarged scale the section A of FIG. 1;
  • FIG. 3 illustrates a view taken along line IIIIII of FIG. 2.
  • the axial compressor has a stator blade support 1 radially centered in a longitudinally split casing 2.
  • An annular projection 3 of the support 1 bears on a suction side end of the compressor in a corresponding groove of a wall 4 which is associated with the casing 2 and defines a suction volute 5 with respect to the middle part of the casing 2.
  • the stator blade support 1 is also radially supported in the casing 2 on the delivery side and bears via a collar 7 on the mating surface of a shoulder 8 of the casing wall which defines a delivery volute 9.
  • a gap 11 which permits axial motion of the delivery end of the stator blade support 1 is provided between the delivery side endface of the stator blade support 1 and a flared guide wall 10 of a diffuser which defines the transition into the delivery volute 9 in order to allow for thermal expansion.
  • a rotor 12 is journalled into two bearing blocks 13 which are separate from the casing 2.
  • the bearing blocks 13 have means for adjusting the bearing blocks relative to the casing 2. For example shims (not shown) of varying thickness are inserted between the bearing blocks 13 and their support surfaces and a lateral dislacement of the bearing blocks 13 is made before the blocks 13 are mounted on their support surfaces. Fine adjustment of the blade clearance is obtained in known manner (not shown) in the bearings themselves.
  • the rotor 12 is provided with a central portion which supports blades 14, and with stepped shoulders 15, 16 on either side of the central portion which, in turn, support sheet metal rings or plates 17 of labyrinth seals (FIG. 2).
  • the rings 17 co-operate with stepped mating surfaces 18 of a split structural part 20, 21 respectively on the suction side and on the delivery side of the compressor.
  • These stepped surfaces 18 define annular grooves, each of which receives a ring 17 as shown, between annular lands, each of which is concentric to a ring 17.
  • the parts 20, 21 which also define the interior of the inlet and diffuser are adjustably mounted on the casing 2. Referring to FIGS.
  • each structural part 20 in order to center each structural part 20 with respect to the labyrinth seal rings 17, four shim blocks 22 are disposed between the casing 2 and the part 20.
  • the shim bloc ks 22 are disposed in offset configuration with respect to the vertical and horizontal because of the horizontal division of the casing 2 and the structural parts 20, 21.
  • Each block 22 is of a wedge-shape and cooperates with individual shims 24 of varying thickness.
  • the shim blocks 22 are inserted in corresponding grooves 23 of the structural parts 20, 21, respectively, and are retained therein by means of screw fasteners (not shown).
  • screw fasteners not shown
  • the internal parts 20, 21 together with the shim blocks 23 screw-mounted thereon, are machine-turned in order to eliminate all eccentricity.
  • the structural parts 20, 21 are located in the casing 2 by means of screw fasteners 25 of which one is shown in FIG. 2.
  • shim plates 26, whose number and- /or thickness may be varied, are provided on the endfaces of the structural parts 20, 21 which are disposed outwardly to the casing 2.
  • stator blade support radially centered within said casing
  • a labyrinth seal between said structural part and said rotor and means to center said structural part radially with respect to said rotor.
  • said labyrinth seal includes a plurality of radially directed rings on said rotor and a plurality of annular grooves in said structural part, each groove receiving a respective ring in spaced relation.
  • each bearing block having means for adjustably mounting the bearing block with respect to said casing and said stator blade support for centering of said rotor relative to said stator blade support.
  • said rotor having a central portion having rotor blades thereon and a pair of said structural parts, each part encircling an opposite end of said rotor relative to said central portion.
  • stator blade support radially centered within said casing
  • a plurality of shim blocks disposed between said structural part and said casing in circumferentially spaced relation about said structural part, and at least one shim between each shim block and at least one of said structural part and said casing for centering said seal relative to said rotor.
  • stator blade support radially centered within said casing to define a suction volute on one side and a delivery volute on an opposite side;
  • a labyrinth sealing means between said casing and said rotor including a structural part adjustably on said casing for radial movement and having an inner annular surface surrounding said rotor with a plurality of annular grooves therein and a plurality of radially directed rings on said rotor cooperating with said grooves and means to center said structural part radially with respect to said rotor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US390896A 1972-09-08 1973-08-23 Axial compressor Expired - Lifetime US3865504A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1319472A CH556476A (de) 1972-09-08 1972-09-08 Axialverdichter.

Publications (1)

Publication Number Publication Date
US3865504A true US3865504A (en) 1975-02-11

Family

ID=4390214

Family Applications (1)

Application Number Title Priority Date Filing Date
US390896A Expired - Lifetime US3865504A (en) 1972-09-08 1973-08-23 Axial compressor

Country Status (6)

Country Link
US (1) US3865504A (de)
JP (1) JPS49108608A (de)
CH (1) CH556476A (de)
DE (1) DE2326685A1 (de)
FR (1) FR2199357A5 (de)
GB (1) GB1391144A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5244216A (en) * 1988-01-04 1993-09-14 The Texas A & M University System Labyrinth seal
US5362072A (en) * 1992-12-21 1994-11-08 Imo Industries, Inc., Quabbin Division Turbine radial adjustable labyrinth seal
US5639095A (en) * 1988-01-04 1997-06-17 Twentieth Technology Low-leakage and low-instability labyrinth seal
US20060182626A1 (en) * 2004-11-04 2006-08-17 Del Valle Bravo Facundo Axial flow supercharger and fluid compression machine
US20120039707A1 (en) * 2007-06-12 2012-02-16 United Technologies Corporation Method of repairing knife edge seals

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US137471A (en) * 1873-04-01 Improvement in metallic cases for turbine wheels
US1227141A (en) * 1916-07-14 1917-05-22 Howard Earl Hoover Lubricating system.
US1756958A (en) * 1928-10-03 1930-05-06 Westinghouse Electric & Mfg Co Elastic-fluid turbine
US2123818A (en) * 1935-07-11 1938-07-12 Wegmann Ernst Labyrinth packing
US3503616A (en) * 1967-12-26 1970-03-31 Westinghouse Electric Corp Eccentric bushing for gland case keys
US3647311A (en) * 1970-04-23 1972-03-07 Westinghouse Electric Corp Turbine interstage seal assembly
US3773430A (en) * 1972-03-17 1973-11-20 Ingersoll Rand Co Gas compressor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4311174Y1 (de) * 1964-09-10 1968-05-15

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US137471A (en) * 1873-04-01 Improvement in metallic cases for turbine wheels
US1227141A (en) * 1916-07-14 1917-05-22 Howard Earl Hoover Lubricating system.
US1756958A (en) * 1928-10-03 1930-05-06 Westinghouse Electric & Mfg Co Elastic-fluid turbine
US2123818A (en) * 1935-07-11 1938-07-12 Wegmann Ernst Labyrinth packing
US3503616A (en) * 1967-12-26 1970-03-31 Westinghouse Electric Corp Eccentric bushing for gland case keys
US3647311A (en) * 1970-04-23 1972-03-07 Westinghouse Electric Corp Turbine interstage seal assembly
US3773430A (en) * 1972-03-17 1973-11-20 Ingersoll Rand Co Gas compressor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5244216A (en) * 1988-01-04 1993-09-14 The Texas A & M University System Labyrinth seal
US5639095A (en) * 1988-01-04 1997-06-17 Twentieth Technology Low-leakage and low-instability labyrinth seal
US5362072A (en) * 1992-12-21 1994-11-08 Imo Industries, Inc., Quabbin Division Turbine radial adjustable labyrinth seal
US20060182626A1 (en) * 2004-11-04 2006-08-17 Del Valle Bravo Facundo Axial flow supercharger and fluid compression machine
US7478629B2 (en) * 2004-11-04 2009-01-20 Del Valle Bravo Facundo Axial flow supercharger and fluid compression machine
US20120039707A1 (en) * 2007-06-12 2012-02-16 United Technologies Corporation Method of repairing knife edge seals
US8911205B2 (en) * 2007-06-12 2014-12-16 United Technologies Corporation Method of repairing knife edge seals

Also Published As

Publication number Publication date
FR2199357A5 (de) 1974-04-05
DE2326685A1 (de) 1974-03-28
JPS49108608A (de) 1974-10-16
CH556476A (de) 1974-11-29
GB1391144A (en) 1975-04-16

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SULZER-ESCHER WYSS AG, A CORP OF SWITZERLAND, SWIT

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BROWN BOVERI-SULZER TURBOMACHINERY LIMITED, JAKOB WYDLER, LIQUIDATOR;REEL/FRAME:005221/0890

Effective date: 19890530