DE2927940A1 - Turbine guide vane mounting prodn. method - uses annular jig with drill bushes secured by hardening synthetic resin - Google Patents

Abstract

The method produces the guide bores for the close-fitting supporting bolts of a mounting for a component round on the outside, partic. the guide vane mounting for a gas or steam turbine, the bolts radiating at regular intervals and fitting in bores in the housing. The mounting is axially located by a stop face bearing against a mating one on the housing. A peripheral datum face (9) of constant dia. is turned on the outside of the blank (1) to accommodate an annular jig (2). This has an ID corresponding to the datum face dia., and apertures (6) accommodating drill bushes (4) of dia. greater than the external bush dia. These apertures are at the same distance from the axial stop face (18) on the jig working against that (8') on the blank as are the drillings (5) in the latter from its stop face. The jig is aligned and fixed in position on the datum face (9) by means of bolts (3) inserted in the drillings (5) in the blank. The drill bushes are then fitted over the bolts and in the jig apertures, and permanently secured in the latter by pouring in hardening synthetic resin.

Description

Production of guide bores of a rn.

device especially for teitsckaafel carriers.

The invention relates to a method according to whether he understood of claim 1.

In such a known support device, e.g.

a teitschaufeiträger in a turblnengekäuse by means of guide bores on the one hand seated in the guide vane carrier and on the other hand held in the turbine housing Support bolts, which are approximately evenly around the circumference of the components mentioned in a radial plane these are distributed end at certain angles to the vertical or horizontal kept running exactly radially, while he is still in the axial direction, so the direction the turbine shaft, is fixed by means of stop surfaces.

It is now possible to use these guide bores in a replacement guide vane carrier with the help of the guide bores in the turbine housing in exactly the same direction However, the turbine housing, the but e.g. (usually) after delivery to the customer or a third party is located.

The task of the invention is just to get this guide drilled in one Manufacture replacement guide vane carrier exactly, ellen that the associated turbine housing and the original guide carrier are available in the factory.

This task is performed in a method of the type mentioned at the beginning solved by the features of the characterizing part of claim 1.

It is possible that the outside diameter of the The mating surface of the original guide vane carrier is measured at the customer or a third party and then the corresponding mating surfaces of the jig and replacement vane carrier lin plant of the supplier of the turbine according to this measurement.

The mentioned mating surface of the original Leltschaufelträger is inevitable therefore available anyway, because for drilling the New description page 6 guide holes in Turkangsge @@@@@@ and in the original Leitschaufeltnäger these necessary @@ n.

There is also the possibility @@@@, one @ @ roßen Keste @@@ fwand; @@ @ drilling jig pa @@@ ni only j @@@@@ ligen machine also to manufacture; so can be installed at any time Replacement guide vane carriers can be supplied.

Based on the figures of the drawing, the invention is explained below, 1 and 2 show a dempftunbine in transverse and longitudinal sections with the support device Fig. 3 an enlarged section with the drilling jig.

Of importance for the explanation of the invention is from Fig. 1 and 2 in essential only to mention the turbine housing 10 (indicated by dashed lines in Fig. 3), the guide vane carrier @ and the guide bores 5 of the same and 5. ″ of the turbine housing and the supporting bolts 3 sitting in it.

In the guide vane carrier or assigned to it are those designated by 11, in this seated guide vanes and the rotor blades carried by the turbine rotor 12 and a stop ring 15 for the axial fixation of the guide vane carrier can be seen (the last mentioned in Fig. 3 also indicated by dashed lines).

The procedure is as follows (see in particular Fig. 3): It is first after the mating surface 9 on the first or UI piece of the guide vane the corresponding opposing seat surface 13 made on the ring-shaped gauge base body 2, The latter is here marked with circles 14, a few mm larger in the Jurc> knife Bores 6 as the bushing outside diameter on a circumference with approximately the bores 5 in the original has corresponding angular distances, so that the support bolts that with a very precise fit to the seat In the guide bores 5 are made in these can be inserted when the basic gauge body is on the mating surface 9 is fixed by means of the stop surface 8 The drill bushings, which are also have the fitting bore of the guide bolts 5, gescli over the support bolts :; and in the brought final position in the teaching body 2.

Then the remaining gaps between the drill bushings and the teaching body with curable synthetic resin 7 cast, which after curing fixes the drill bushings in the correct position.

It goes without saying that the distance between the center lines of the holes or openings 6 in the gauge base body 2 of the stop surface 18 of the same, the yes the stop surface 8 'of the turbine housing must correspond, after the corresponding distance in relation to Leltschat-.

carrier and turbine housing is about the same. But this goes without saying by itself and does not present any difficulties, as the inside diameter of the bores 6 in the drilling jig is a few mm larger than the outer diameter of the drill bushing 4. It is easy to see that the bushings 4 are not exactly centered in the respective Opening 6 of the basic body of the gauge need to sit, since the potting compound 7 deviations from 1 to 2 mm easily allows.

After the drilling jig has been completed, the second and Follow-up pieces of the guide vane carrier with their help very precisely without further ado Guide holes are generated, as these also the mating surface 9 and the 1-striking surface 8 have. The alignment of the drilling jig in the circumferential direction can generally be done by eye, since here too there are slight deviations in the position of the guide vane carrier to the housing according to the guide holes in relation to the vertical or horizontal are not important, and it essentially comes down to the required the mutual angular distance must be strictly adhered to.

Claims (2)

P a t e n t a n s p r ü c h e Process for producing the guide bores for the radial support bolts of a support device made with an exact fit for an externally essentially rotational body-like component, in particular one Guide vane carrier - a gas or steam turbine, which is in a hollow body-like their component, in particular a gas or steam turbine housing, through the guide bores of the two components extending and essentially in a radial plane of the same at their circumference, angularly offset to one another, roughly evenly distributed, aslant and bearing bolts, which are exactly radially arranged symmetrically to the vertical and in cooperation on a stop surface of the other component similar to the hollow body .Is axially fixed with its own hash surface corresponding to this, d a d u r c h g e k e n n n z e i c h n e t that radially outside the original piece (1) accordingly on the second and subsequent pieces of the rotat aes body-like component (1) a circumferential Mating surface (9) each of the same diameter is rotated on the lathe that a drilling jig is produced by using an annular jig base body (2) with an inner diameter which corresponds to the diameter of the mating surface (9), ur.d rit to accommodate drill bushings (4) serving openings (vo with a slightly larger diameter than their outer diameter and about such a distance from the, the axial Stop surface (8 ') of the original piece (1) corresponding, axial stop surface (18) of the jig base body (2), which is the same as the distance between the guide bores (5) in the original of its axial stop surface, (8 ') is provided, the basic gauge body (2) with the openings (6) with the aid of the supporting bolts inserted into the original piece (i) (3) is aligned and fastened on its mating surface (9), the drill bushings (4y inserted over the support bolts (3) and into the openings (6) of the basic gauge body (2) and they will go through this Potting and curing hardenable Synthetic resin (7) are permanently set, and that the guide holes (3) in the second and subsequent pieces of the rotational body-like component (1) by means of the Drilling jig, whereby these are defined by the axial stop surfaces (8, 8 ') individually and through the length of the drill bushings (4) in the circumferential direction by eye or measurement on the other hand is aligned on the component (1). 2. Production of the guide bores according to claim \, characterized in that that the synthetic resin compound (7) or the drill bushes (4) through the jig base body and in the drill bushes provided grooves (10) are anchored.