DE2255853B1

DE2255853B1 - Device for the guide vane adjustment

Info

Publication number: DE2255853B1
Application number: DE2255853A
Authority: DE
Inventors: Ferdinand Dipl.-Ing. Andelfingen Zerlauth (Schweiz)
Original assignee: Brown Boveri Sulzer Turbomaschinen AG
Current assignee: Brown Boveri Sulzer Turbomaschinen AG
Priority date: 1972-11-08
Filing date: 1972-11-15
Publication date: 1974-05-30
Also published as: CA987236A; FR2205952A5; JPS49133909A; US3893784A; DE2255853C2; IT999287B; GB1395310A; JPS5222446B2; CH557960A

Description

3 43 4

eines Verdichters einer Gasturbinenanlage wieder, und der ersten Leitschaufelreihe 2 relativ groß ist,a compressor of a gas turbine system again, and the first row of guide vanes 2 is relatively large,

wobei die Darstellung ein Längsschnitt in einer verti- besteht die Gefahr, daß die Bänder 22 bei Stoß- oderwherein the illustration is a longitudinal section in a vertical direction, there is a risk that the bands 22 at impact or

kalen Achsebene der Maschine ist; Druckbelastungen auf dieser relativ großen Axial-is the kalen axis plane of the machine; Pressure loads on this relatively large axial

F i g. 2 stellt ein vergrößertes Detail aus F i g. 1 länge ausknicken. Daher ist zur Erhöhung der Stabi-F i g. 2 shows an enlarged detail from FIG. Bend 1 length. Therefore, to increase the stability

dar; 5 lität zwischen den Reihen 1 und 2 zusätzlich ein Frei-dar; 5 between rows 1 and 2 there is also a free

F i g. 3 ist ein Schnitt III-III der F i g. 4 durch schwebender, d. h. nur durch seine Befestigungen 26F i g. 3 is a section III-III of FIG. 4 by floating, d. H. only through its fastenings 26

einen Verstellring, wobei die Schnittebene in Um- in den Bändern 22 gehaltener Stützring 27 vorgese-an adjusting ring, the cutting plane being provided in the support ring 27 held in the bands 22

fansgrichtung des Ringes geringfügig vor oder hinter hen.fan orientation of the ring slightly before or after hen.

derjenigen den Fig.2 liegt, so daß nicht mehr die Angetrieben wird die Verstellvorrichtung durchthat of Fig.2 is so that the adjusting device is no longer driven by the

Verbindung des Ringes mit einem der Bänder son- ίο zwei seitlich am Ring 16 der Reihe 2 angreifendeConnection of the ring with one of the bands, but ίο two acting on the side of the ring 16 of row 2

dern sein Querschnitt im Bereich seiner Lagerele- Servokolben 28 (F i g. 1), die mit ihrem einen Endeits cross-section in the area of its bearing element servo piston 28 (FIG. 1), which at one end

mente gezeigt ist; im Verdichtergehäuse gelagert sind und mit dem an-ments is shown; are stored in the compressor housing and with the other

Fig.4 zeigt in einer perspektivischen Skizze die deren Ende an einem nahe, der horizontalen Tei-Fig. 4 shows in a perspective sketch the end of which at a near, the horizontal part

Wirkungsweise der neuen Verstellvorrichtung an lungsebene gelegenen, gabelartigen Ansatz des ge-Mode of operation of the new adjustment device at the management level, fork-like attachment of the

zwei verstellbaren Leitschaufelreihen, wobei pro 15 nannte Ringes 16 mit Spiel angreifen.two adjustable guide vane rows, with each 15 called ring 16 attack with play.

Reihe nur je eine Schaufel dargestellt ist. Die Befestigung 24 sitzt in augenartigen Ansätzen Row only one shovel is shown. The attachment 24 sits in eye-like approaches

Bei dem in Fig. 1 mit seinem saugseitigen Ende 30 (Fig.2) der Ringe 16 und besitzen— ebenso wie wiedergegebenen Verdichter, der zu einer nicht wei- die Befestigungen 23 und 26 — einen im Auge 30 ter dargestellten Gasturbine gehört, sind bei einer durch einen Stift 31 gegen Verdrehen gesicherten Vorleitstufe 1 die Schaufeln 6 sowie bei den ersten ao Zapfen 32 der sich zusätzlich mit einer Schulter 33 vier Leitschaufelreihen 2 bis 5 die Schaufeln 7 ver- auf dem Ansatz 30 abstützt. Der Zapfen 32 ist im stellbar ausgebildet, während die Leitschaufeln 8 der Bereich der Bänder 22 — über eine Zwischenlage höheren Verdichterstufen feststehend sind. Die aus Trockenlaufmaterial — von einem zweiteiligen, Schaufeln 6 und 7 sind daher über eine Trockenlauf- sich auf der anderen Ringfläche der Schulter 33 ablagerung 9 drehbar in einem in einer horizontalen »5 stützenden Einspann- oder Verstärkungselement 34 Achsebene geteilten Leitschaufelträger 10 gelagert, umschlossen, dessen beide Teile unter Einspannung der den Laufschaufeln 11 tragenden Rotor 12 kon- des Bandes 22 miteinander verschraubt sind. Durch zentrisch umschließt. einen Schraubenbolzen 35, der in den Zapfen 32 ein-In the case of the one in FIG. 1 with its suction-side end 30 (FIG. 2) of the rings 16 and have - as well as shown compressor, which to a not white the fastenings 23 and 26 - one in the eye 30 The gas turbine shown here is secured against rotation in one by a pin 31 Vorleitstufe 1 the blades 6 as well as in the first ao pin 32 which is additionally provided with a shoulder 33 four guide vane rows 2 to 5, the vanes 7 are supported on the shoulder 30. The pin 32 is in adjustable, while the guide vanes 8 are the area of the belts 22 - via an intermediate layer higher compressor stages are fixed. The one made of dry running material - from a two-part, The blades 6 and 7 are therefore deposited on the other annular surface of the shoulder 33 via a dry run 9 rotatable in a clamping or reinforcing element 34 supported in a horizontal »5 Axial plane split guide vane carrier 10 mounted, enclosed, the two parts of which under restraint of the rotor 12 carrying the rotor blades 11 are screwed together with the cone of the band 22. By encloses centrically. a screw bolt 35, which is inserted into the pin 32

Die verstellbaren Schaufeln 6 und 7 sind über — geschraubt wird, sind die Elemente 34 über eine für alle Schaufeln aus fabrikatorischen Gründen 30 Scheibe 36 auf dem Zapfen 32 mit Spiel gehalten,
gleich ausgebildete — Hebel 13, die durch Schrau- Die Wirkungsweise der erfindungsgemäßen Vorben 14 in den Schaufelfüßen 15 gehalten sind, mit richtung zeigt die perspektivische Skizze der F i g. 4, Verstellringen 16 verbunden. Zu diesem Zweck grei- in der die Wege 40 und 41 zweier Ringe 16 aus einer fen Gleitsteine 17 die auf, an die freien Enden der ersten, strichpunktiert dargestellten Stellung in eine Hebel 13 angeschweißten Zapfen gelagert sind, in 35 zweite ausgezogene Stellung sowie umgekehrt bei entsprechende Ringnuten 18 der Ringe 16 ein. Die einer Drehung in Richtung des Doppelpfeiles 42 dar-Ringe 16 selbst, deren Durchmesser für die höheren gestellt sind. Die Bänder 22, die beispielsweise aus Druckstufen kleiner wird, sind mit seitlichen, etwa 60 mm breiten und 1,5 mm dicken, gestanzten flanschartigen Ansätzen 20 (Fig.3) auf drei, mit Blechstreifen bestehen, erfahren dabei die in Fig.4 Trockenlaufmaterial belegten, gleichmäßig über den 40 angedeutete Verwindung, während die Ringe 16 ne-Umfang verteilten Lagerelemente 19 (F i g. 3) abge- ben der Drehung eine axiale Gleitbewegung mit der stützt, die ihrerseits auf entsprechenden Ansätzen 21 gewünschten linearen Abhängigkeit ihrer Wege unan der Außenseite des Leitschaufelträgers 10 befe- tereinander auf den Lagerelementen 19 ausführen, stigtsind. Über die in ihren Ringnuten 18 gelagerten Gleit-The adjustable blades 6 and 7 are screwed over, the elements 34 are held by a disk 36 on the pin 32 with play for all blades 30 for manufacturing reasons,
identically designed - levers 13, which are held by screw The operation of the Vorben 14 according to the invention in the blade feet 15, with direction shows the perspective sketch of FIG. 4, adjusting rings 16 connected. For this purpose, the paths 40 and 41 of two rings 16 from a fen sliding blocks 17 which are mounted on pins welded to the free ends of the first position shown in phantom in a lever 13, in the second extended position and vice versa corresponding annular grooves 18 of the rings 16 a. The one rotation in the direction of the double arrow 42 represents rings 16 themselves, the diameters of which are made for the higher. The bands 22, which for example become smaller from pressure levels, are made with lateral, about 60 mm wide and 1.5 mm thick, punched flange-like projections 20 (FIG. 3) on three, with sheet metal strips, experience the dry-running material shown in FIG occupied, evenly indicated over the 40 indicated torsion, while the rings 16 ne-circumference distributed bearing elements 19 (Fig. 3) give the rotation an axial sliding movement with the support, which in turn on corresponding lugs 21 desired linear dependency of their paths inappropriately the outside of the guide vane carrier 10 fastened to one another on the bearing elements 19, are continuous. About the mounted in their ring grooves 18 sliding

Erfindungsgemäß sind die ebenfalls in ihrer Hori- 45 steine 17 ergibt sich infolge der Axialverschiebung zontalebene geteilten Verstellringe 16 der einzelnen der Ringe 16 eine Drehung der Hebel 13 und der da-Stufen 1 bis 5 untereinander durch drei, über den mit verbundenen Schaufeln 17. Für kleine Drehwin-Umfang verteilte, elastisch verwindungsfähige Bän- kel, die infolge der Anordnung der Schaufelreihen 1 der 22 verbunden, die an ihrem stromabwärtigen bis 5 zwischen den axialen Extremstellungen ihrer Ende mit Hilfe von zapfenartigen Befestigungen 23, 50 zugehörigen Verstellringe 16 sowie durch die Steldie konstruktiv gleich denjenigen für die Verbindun- lung der Hebel 13 in Umfangsrichtung zum Schaufelgen 24 der Ringe 16 mit den Bändern 22 ausgebildet träger 10 gewährleistet sind, ist der lineare Weg der sind und später beschrieben werden, in entsprechen- Verstellringe nahezu gleich dem bogenförmigen Weg den Ansätzen 25 im Schaufelträger 10 drehbar gela- der Hebel 13; für diese Winkel besteht dann, wie gegert. 55 fordert, praktisch ein linearer Zusammenhang zwi-According to the invention, the hori- 45 stones 17 also result from the axial displacement zontal level split adjustment rings 16 of the individual rings 16 a rotation of the lever 13 and the da-stages 1 to 5 below each other by three blades, above the blades 17 connected to each other. For small turning winches distributed, elastically twistable banks which, as a result of the arrangement of the rows of blades 1 connected to the 22, which at its downstream to 5 between the extreme axial positions of its End with the help of peg-like fastenings 23, 50 associated adjustment rings 16 and through the Steldie structurally identical to those for connecting the levers 13 in the circumferential direction for shoveling 24 of the rings 16 formed with the bands 22 carrier 10 are guaranteed, the linear path is the are and will be described later, in corresponding adjustment rings almost equal to the arcuate path the lugs 25 in the blade carrier 10 rotatably loaded the lever 13; for this angle there is then, as gerted. 55 calls for a practically linear relationship between

Da der axiale Abstand zwischen der Vorleitstufe 1 sehen den Drehwinkeln der einzelnen Schaufelreihen.As the axial distance between the preliminary guide stage 1 see the angles of rotation of the individual rows of blades.

Hierzu 1 Blatt Zeichnungen 1 sheet of drawings

Claims

are summarized, for the individual steps lever patent claims: different lengths are used. Furthermore, a construction is known in which, for

1. Practical device for adjusting the guide vanes of several stages development in multi-stage axial turbo compressors, where 5 in a linearly dependent relationship to one another, in the case of the blades of a stage via levers in each case a rod rotatably mounted on the housing in one are connected to a rotatable adjusting ring, level is pivoted, whereby adjusting rings are and further rotating the adjustment rings of each; their rotation is then via tenons Steps over with their downstream and - at least substantially axially extending end connectors rotatably attached to the housing - transfer levers to the blades. There connection elements connected to each other and in this construction the pivoting movement of the are adjustable at the same time and in the same direction, rod not parallel to the rotary movement of the adjustment thereby characterized by the fact that the conical ring runs, this necessarily results in a rotatable mechanism with large tolerances and a lot, which is mounted centrally to the machine axis Ren adjusting rings (16) are axially displaceable, 15 play between the individual, relative to each other wherein the blades (6, 7) of a stage (1 to 5) in moving elements. For a larger number of steps axial direction between the two extreme and only slightly increased requirements The position of the associated adjusting ring (16) depends on the accuracy of the blade setting are stored, and that also the adjusting rings (16) known construction therefore completely unsuitable. Consecutively The known adjusting mechanism can turn over several elastically twisted Bands (22) are connected. the imprecise guidance of the individual movements

2. Device according to claim 1, thereby preventing jamming or at least being stiff, indicates that one of the upstream positions - i.e. very large actuating forces - require. Although you can Genen adjusting rings (16) is driven. these disadvantages in principle by ball joints and

3. Apparatus according to claim 1, characterized in that the rings are arranged concentrically with respect to the indicates that the straps (22) are eliminated between two machine bodies; it results Adjusting rings (16) then, however, a very complex and expensive Konschwebend between them The bearing support ring (27) supports the structure.

are. The object of the invention is to provide a structurally single

4. Apparatus according to claim 1, thereby creating 30-fold adjusting device in which the indicates that the bands (22) from a thin ratio of the adjustment angle for the blades flat spring steel sheets exist. - if it is largely linear, without affecting the accuracy

5. The device according to claim 1, characterized in that the setting and the easy mobility of the indicates that the individual blades (6, adjustment by the aforementioned high construction 7) with the adjusting rings (16) connecting he- 35 effort - z. B. a ball joint for each at (13) at least approximately in the circumferential direction - blade - must be guaranteed.

tion to the blade carrier (10). This object is achieved according to the invention by that the rotatable adjusting rings, which are mounted concentrically to the machine axis, are axially displaceable

40, with the blades of a stage between the

two extreme axial positions of the associated adjusting ring are supported, and that the adjustment

The invention relates to a device for the collars with one another via several, elastically ver-guide vane adjustment in the case of multi-stage axial tower windings, tapes capable of winding are connected. In counterboots, The blades of a stage over 45 sets of the known construction discussed above The blade adjustment in the new type of pre-tied follows with a rotatable adjustment ring are, and furthermore the adjustment rings of the direction by the axial movement of the adjustment individual Step over with downstream rings, which are created by rotating them with the help of the ribbon ends Connection rotatably attached to the housing, which, as required, is forced to decrease linearly elements connected to each other and at the same time turns 50.

and are adjustable in the same direction. If the adjustment is to be carried out by a motorized

In order to achieve the partial load behavior of Axialturbomaschi- drive, it is advantageous if one of the

To improve, very small minimum loads drive upstream adjustment rings

to be able to or, for example, with gas turbine plant; where, seen in the direction of flow,

genes that are to be applied by an auxiliary drive are rings at relatively large angles of rotation

To reduce mileage, it is necessary to keep the control forces relatively small. The torsional

shovel at least individual stages of such stomachs strips, which are advantageously made of thin spring

to train machines adjustable. Steel sheets should be punched very often, they tend to buckle

in these vanes then the angle of rotation to ken if they are too large distances between

which the blades of the individual stages are subjected to pressure with one 60 two adjusting rings;

The correct path of the adjustment mechanism can be rotated. Such a buckling can be easily

which, practically in a linearly dependent relationship, can be prevented by the ligaments between

stand to each other, z. B. so that the angle for the two adjusting rings by one between them

Levels of higher pressure linearly decreasing lower floating support ring are supported,

will. 65 In the following the invention is based on a

Such a connection can be z. B. thereby embodiment in connection with the

produce that explained in more detail between the blades and their drawing.

Adjusting rings which, for example, lead to a sleeve. 1 gives the first steps in an excerpt