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EP0885355A1 - Dispositif d'alimentation en huile du moyeu de roue a aubes d'une turbomachine par l'intermediaire d'une douille flottante - Google Patents

Dispositif d'alimentation en huile du moyeu de roue a aubes d'une turbomachine par l'intermediaire d'une douille flottante

Info

Publication number
EP0885355A1
EP0885355A1 EP97905108A EP97905108A EP0885355A1 EP 0885355 A1 EP0885355 A1 EP 0885355A1 EP 97905108 A EP97905108 A EP 97905108A EP 97905108 A EP97905108 A EP 97905108A EP 0885355 A1 EP0885355 A1 EP 0885355A1
Authority
EP
European Patent Office
Prior art keywords
oil
turbine shaft
bushing
oil supply
discharge
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.)
Withdrawn
Application number
EP97905108A
Other languages
German (de)
English (en)
Inventor
Franz Schaberger
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.)
JM Voith AG
Original Assignee
JM Voith 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 JM Voith AG filed Critical JM Voith AG
Publication of EP0885355A1 publication Critical patent/EP0885355A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
    • F03B3/12—Blades; Blade-carrying rotors
    • F03B3/14—Rotors having adjustable blades
    • F03B3/145—Mechanisms for adjusting the blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/40—Transmission of power
    • F05B2260/406—Transmission of power through hydraulic systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F05B2260/76—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism using auxiliary power sources
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

Definitions

  • the invention relates to a device for control and
  • a turbomachine in which such a device is used is, for example, a Kaplan tubular turbine.
  • the turbine shaft is usually approximately horizontal or slopes slightly downwards.
  • the inflow and outflow occur almost axially to the impeller.
  • the impeller is provided with adjustable impeller blades.
  • the impeller blades are adjusted via an oil-hydraulic servo motor, which is accommodated in the impeller hub itself.
  • Servomotors of this type, including their oil supply are known, cf. Joachim Raabe, "Hydraulic machines and systems", 2nd edition 1989, VDI-Verlag GmbH, pages 384, 390 and Willi Bohl, "Flow machines I", 6th edition 1994, Vogel-Buchverlag, page 128, picture 7.21.
  • the servomotors shown each have a piston which is attached to the hub in a rotationally rigid manner and which is surrounded by an axially movable cylinder.
  • the individual mechanisms for adjusting the impeller blades are articulated on the outside of the cylinder.
  • hydraulic oil is supplied to the respective cylinder space.
  • Two different oil channels are used for this.
  • One channel leads to the piston crown side within the cylinder space, another leads to the piston rod side.
  • the hub oil is pumped into the interior of the hub or pumped out.
  • the three channels are formed in the bore of the turbine shaft via two pipes arranged concentrically to one another.
  • the hydraulic oil used to open the impeller is guided in the space between the turbine shaft bore and the outer tube. It reaches the piston rod side in the cylinder.
  • the hydraulic oil used to close the impeller flows in the space between the outer tube and an inner tube.
  • the inner tube which has the channel with the smallest cross section, communicates with the inside of the hub.
  • This tube is mechanically coupled to the cylinder of the servo motor. It has the function, inter alia, of mechanically transmitting the impeller division from the front shaft end to the rear shaft end for display and / or electrical detection of the wing position by its longitudinal displacement. The amount of oil displaced by the piston rod is also moved back and forth over the inner tube.
  • the channels in which the control and lubricating oil are routed are supplied with oil using an oil feed block.
  • the oil supply stand consists of a solid bracket which carries a tubular housing. The console is set up on the generator dome floor by means of fitting plates and rigidly fixed. Individual oil feed bushings are located in the housing at least for the supply of the control. Each oil feed bush is individually floating and sealed in the radial direction. They are secured against rotation, for example, by means of pins.
  • the housing has a return hood on its free end face.
  • the third channel leading the hub oil ends in the latter.
  • the hub delta under 3 * 10 5 Pa loads the turbine shaft with a relatively high axial force.
  • the invention is based on the problem of creating a device for the control and lubricating oil supply which on the one hand is at least axially centered on the end of the turbine shaft and on the other hand has a relatively low weight.
  • it should also be able to be adjusted with simple means.
  • it is said to have a supporting or supporting function in some cases.
  • the disadvantages known from the prior art are to be avoided.
  • the problem is solved in that, on the one hand, all oil-carrying pipes for supplying the impeller servomotor are supplied with control and / or lubricating oil via the oil-supplying and discharging bushing, and on the other hand, that the oil-supplying and discharging bushing on the free turbine shaft end or an extension of the turbine shaft is mounted in a floating manner, the torque acting on the bush being supported at a fixed bearing point with at least one tension and / or compression rod articulated tangentially on the bush.
  • the hydraulic oil is fed radially to the end of the turbine shaft, the individual feeds and discharges being sealed off from one another and from the outer edge of the oil feed bushing.
  • the pressurized oil acts only on small end face areas between the oil feed bushing and the shaft carrying it, so that
  • the torque acting on the oil feed bushing is at least in the case of an approximately horizontally oriented turbine shaft via a pull rod, a push rod or a
  • the oil feed bushing can be supported on the generator housing.
  • tangentially articulated tension and / or compression rods are attached.
  • the oil feed bushing can also be prevented from rotating by means of pins or bolts. The pins or bolts are included aligned parallel to the turbine shaft and protrude into a corresponding recess on the oil feed bushing.
  • Figure 1 longitudinal section of the turbine shaft end with an oil supply bushing and a front view
  • FIG. 1 oil feed bushing in longitudinal section
  • the longitudinally cut turbine shaft end is shown. It consists of an extension shaft (20) on which an oil feed bushing (40) is mounted.
  • the oil supply pipes (14-17) are supported at the rear end of the turbine, cf.
  • Figure 2 taking into account the section line (9) in Figure 1.
  • the oil supply pipes (14-17) are so-called precision steel pipes which, as a bundle of pipes of four identical pipes, supply the impeller hub with control and lubricating oil through the hollow turbine shaft.
  • the extension shaft (20) is designed as a tube in the front area.
  • the oil feed pipes (14-17) run in the extension shaft (20) approximately parallel to their center line (12). When viewed in cross section, all of the oil supply pipes (14-17) lie on a circle around the center line (12) and are offset from one another by 90 °. Two oil supply pipes (14, 15) and (16, 17) lying opposite each other transport the same oil flow.
  • the oil feed pipes (14-17) end in parallel longitudinal bores (22-25). These longitudinal bores (22-25) are drilled out so far in their front area that the oil supply pipes (14-17) can be inserted. In this area, two recesses are made in each of the individual longitudinal bores (22-25), in which O-rings (28) are seated.
  • the longitudinal bores (22-25) end in inspection bores (22'-25 ') which are closed by means of a medium-tight seal via a bearing bush (30) arranged on the extension shaft (20).
  • the longitudinal bores (22-25) can also be closed by plugs (22 “-25"), cf. Figure 2a.
  • the longitudinal bores (22-25) are designed as through bores, each of which has a section with a slightly enlarged diameter at the free end of the extension shaft (20). This section has an internal thread.
  • the individual plug (22 “-25”) essentially has a cylindrical body. For fixing in the respective longitudinal bore (22- 25) it carries a threaded section at its rear end. An O-ring sits in an annular groove in front of the threaded section.
  • the sealing plugs (25 “, 24") close the longitudinal bores (25, 24) in which the oil supply pipes (16, 17) end.
  • the length of these plugs (25 “, 24") is chosen so that they end in front of the ring channel (52).
  • the other two, longer plugs (22 “, 23") end in front of the ring channel (51).
  • the sealing plugs (22 "-25") are screwed into the respective longitudinal bore (22-25) at their outer end, for example with an internal hexagon (not shown).
  • the design of the longitudinal bores (22-25) shown in FIG. 2a allows a simplified assembly of the extension shaft (20).
  • Four long mandrels can be pushed through the longitudinal bores (22-25) before the extension shaft (20) is placed on the turbine shaft, and these are inserted into the free ends of the oil feed pipes (14-17).
  • the centering effect of the mandrels makes it easier to thread the oil feed pipes (14-17) into the longitudinal bores (22-25).
  • the oil feed bushing (40) sits on the rotating extension shaft (20) with axial and radial sliding bearings.
  • the non-rotating oil feed bushing (40) is supported on the stationary generator dome base (1) via several components (110, 120, 130), cf.
  • Figure 1 The oil feed bushing (40) is seated on the bearing bushing (30) which is firmly connected to the extension shaft (20) via a sliding lining (41).
  • the latter has the shape of a pot, the edge of which protrudes radially outward as a flange (32) in the manner of a flange.
  • the collar (32) contains the right axial bearing surface.
  • the left axial bearing surface is formed with the help of an annular disc (33), which is centered on the left end face of the bearing bush (30).
  • Each hydraulic connection opens into its own ring channel (51- 53).
  • each ring channel (51-53) is hydraulically connected to the respective longitudinal bore (22-25) via a transverse bore (55-57). From the right one
  • Hydraulic connection (42) flows the oil used to open the impeller etc. into the oil feed pipe (14).
  • the oil for closing the impeller is pumped into the oil feed pipe (17) via the left hydraulic connection (43).
  • the hub oil is conveyed into the blind bores (26, 27) via the middle hydraulic connection (44).
  • the blind bores (26, 27) open directly into the main bore (21) of the extension shaft (20).
  • Three hydraulic connections (45-47) arranged next to one another on the underside of the oil feed bushing (40) serve to empty the three hydraulic lines. Each of them is connected to a ring channel (51-53).
  • Lids (40 *) are reinforced with oil seals at the lead-through points. Outside the oil feed bushing (40), the return rod (35) serves for the mechanical display of the impeller blade position and the removal thereof by means of electrical path and / or angle of rotation measuring devices (5), cf. Figure 1
  • the partially cylindrical outer wall of the oil feed bushing (40) is face milled on both side areas, cf. FIG. 3.
  • a ball joint (110) is arranged on each lateral plane surface (50) at the level of the center line (12).
  • Each joint comprises a ball pin (111) and a joint eye (112).
  • the ball pin (111) shown has a flange at its left end and a thread at its right end.
  • the ball pin (111) is screwed to the oil feed bushing (40) above the flange.
  • In the front part of the articulated eye (112) there is a pierced ball, which can be pivoted in part on all sides.
  • FIG. 4 shows the support of the rod (120) on the generator dome base (1).
  • Support is provided via a swivel joint (130).
  • the latter mainly comprises two angle brackets (131) screwed to the generator dome base (1), which bear a cylindrical bolt (132).
  • the angle iron (131) are insulated from the generator dome floor (1).
  • the fastening screws (136) are insulated from the respective angle iron (131) in the area of their shaft and their head support.
  • the bolt (132) carried by the angle iron (131) is secured on both sides by means of circlips to prevent it from moving which would impair its function.
  • a pivot block (133) on the bolt (132) which receives the rod (120) via a left-hand thread.
  • the rod (120) is fixed with a nut.
  • the swivel block (133) sits on the bolt (132) via a so-called torsion thrust spring (134).
  • the torsion thrust spring (134) consists of two rings lying concentrically one inside the other, which are elastically connected to one another via a rubber or plastic layer.
  • the outer ring of the torsion spring (134) is fastened in the swivel block (133), for example, via a cross-press seat.
  • the inner ring is supported on both sides by spacer sleeves (135) on the angle iron (131).
  • the oil feed bushing (40) is supported in an articulated and slightly elastic manner on the generator dome base (1) above the bars (120).
  • the rods (120) and the joints (110, 130) support the torque generated by the bearing friction between the oil feed bushing (40) and the extension shaft (20) or the bearing bushing (30). Because the support in the area of the center of gravity of the oil feed bushing (40) and the rods (120) and joints (110, 130) allow smaller deflections, the oil feed bushing (40) is automatically centered on the bearing bushing (30) by means of a hydraulic lubricating film. In part, the rods (120) also support part of the weight force exerted by the extension shaft (20), which reduces the bending stress on the extension shaft (20).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Turbines (AREA)

Abstract

L'invention concerne un dispositif d'alimentation en huile de commande et de lubrification d'un moyeu contenant le servomoteur d'une roue à aubes fixée par une bride à l'arbre de turbine d'une turbomachine à aubes réglables. Le moyeu est raccordé hydrauliquement à une douille (40) d'amenée et de décharge d'huile, montée au niveau de l'extrémité libre de l'arbre de turbine, par l'intermédiaire de l'arbre creux de turbine dans lequel sont logés au moins deux tuyaux de guidage d'huile (14-17). D'une part, tous les tuyaux de guidage d'huile pour l'alimentation du servomoteur de roue à aubes sont alimentés en huile de commande et/ou de lubrification par l'intermédiaire de la douille d'amenée et de décharge d'huile. D'autre part, la douille d'amenée et de décharge d'huile est montée de façon flottante sur l'extrémité libre (20) de l'arbre de turbine ou sur un prolongement de l'arbre de turbine. Le couple de rotation agissant sur la douille est supporté sur un point d'appui fixe par au moins une tige de traction et/ou de poussée (120) articulée de façon tangentielle sur la douille. L'invention permet d'obtenir un dispositif d'alimentation en huile de commande et de lubrification à autocentrage au moins axial sur l'extrémité de l'arbre de turbine, qui possède une fonction d'appui ou de support en dépit d'un poids intrinsèque relativement faible.
EP97905108A 1996-03-05 1997-02-27 Dispositif d'alimentation en huile du moyeu de roue a aubes d'une turbomachine par l'intermediaire d'une douille flottante Withdrawn EP0885355A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19608343A DE19608343A1 (de) 1996-03-05 1996-03-05 Vorrichtung zur Ölversorgung der Laufradnabe einer Strömungsmaschine über eine schwimmend gelagerte ölzu- und abführende Buchse
DE19608343 1996-03-05
PCT/EP1997/000954 WO1997033087A1 (fr) 1996-03-05 1997-02-27 Dispositif d'alimentation en huile du moyeu de roue a aubes d'une turbomachine par l'intermediaire d'une douille flottante

Publications (1)

Publication Number Publication Date
EP0885355A1 true EP0885355A1 (fr) 1998-12-23

Family

ID=7787193

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97905108A Withdrawn EP0885355A1 (fr) 1996-03-05 1997-02-27 Dispositif d'alimentation en huile du moyeu de roue a aubes d'une turbomachine par l'intermediaire d'une douille flottante

Country Status (3)

Country Link
EP (1) EP0885355A1 (fr)
DE (1) DE19608343A1 (fr)
WO (1) WO1997033087A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2981684B1 (fr) * 2011-10-21 2013-12-27 Snecma Systeme de commande d'incidence de pale de turbomachine et turbomachine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE972992C (de) * 1948-10-02 1959-11-12 Voith Gmbh J M Einrichtung zur Zufuehrung von Druckoel zu dem in der Hohlwelle von Kaplanturbinen oder Verstellpropellern angeordneten hydraulischen Servomotor fuer die Laufradschaufelverstellung
DE1068639B (fr) * 1955-03-15 1959-11-05
DE1097309B (de) * 1956-11-07 1961-01-12 Lips Nv Verstelleinrichtung fuer die Blaetter von Schiffsschrauben
SE220082C1 (fr) * 1963-04-29 1968-04-09
SE455629B (sv) * 1986-11-25 1988-07-25 Flygt Ab Rotationskoppling

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9733087A1 *

Also Published As

Publication number Publication date
DE19608343A1 (de) 1997-09-11
WO1997033087A1 (fr) 1997-09-12

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