UA57357C2 - Working wheel of axial turbo-machine - Google Patents

Abstract

A working wheel of an axial turbo-machine with blades placed in the disk of the wheel with support in the tightening ring which is placed between the walls of the U-like support split ring in common with the circular collar of the disc, directed to the long axis; at that in the slot of that one stopper is installed, as a U-like support ring, this is fixed with a flat lock. The slot for the stopper is made in one wall of the U-like support ring, is placed between the disc collar and the disc, and in through way connected to the additional diagonal cut made in the other wall, in front of the slot; at that the stopper is made as a plate going to the slot, one surface of it is connected to the lock.

Description

sealing ring.

A flat lock contains a slot with a latch plate located in it. The slot is open radially to the longitudinal axis of the wheel. The parts of the lock on both sides of the slot and the locking plate in the axial direction are located under the O-shaped locking ring and, as a result, are interconnected with it.

At the same time, the retainer plate is pushed out in the radial direction between the indicated axis and the parts of the lock under the O-shaped locking ring.

To ensure the manufacturability of assembly and disassembly of the structure, the combined holes of the disc edge and the sealing ring also have combined through slots in the direction of the longitudinal axis.

At the same time, in one of the corners of the latch plate, there is a latch rod. It has a round cross-section with slits. The coots are parallel to each other and to one of the sides of the plate.

A split O-ring on the surface of the wall between the edge of the disk and its body, in the direction of the latter, contains an annular protrusion along the longitudinal axis. At the same time, the protrusion has a longitudinal slot in the area where the flat lock is located.

In addition, the edge of the disc and the sealing ring are fastened with at least one longitudinal pin, the ends of which are located between the walls of the O-shaped body, which prevents the displacement of the construction parts relative to each other.

All this ensures the previously mentioned technical results of the proposed device.

The claimed technical solution is illustrated by drawings, where: - Fig. 1 shows a fragment of the turbine impeller in assembled form; - Fig. 2 is a view A of the wheel details showing the elements used to install the retainer and the pins that keep the sealing and retaining rings from moving in the circumferential direction (split ring, retainer, flat lock and pin not shown); - Fig. 3 shows the M-M section (see Fig. 2), which shows the installation of one of the pins that keeps the sealing ring from moving in the circumferential direction (the split ring is not shown); - Fig. 4 shows view A (see Fig. 1) of the split ring; - Fig. 5 shows view B (see Fig. 1) of the split ring; - fFig. 6 shows an enlarged cross-section E-E (see Fig. 4) of a split ring; - Fig. 7 shows enlarged cross-sections YYYY-Y and К-К (see Fig. 5) of the split ring; - Fig. 8 shows two enlarged projections of the retainer designed to hold the ends of the split locking ring; - Fig. 9 shows a lock designed to hold the latch in the axial direction; - Fig. 10 shows enlarged cross-sections Y-Y and (3-E (see Fig. 9) of the lock; - Fig. 11 shows Fragment B (see Fig. 2), which shows the position of the latch before placing it in the turbine impeller; - Fig. 12 shows the fragment B (see Fig. 2), which shows the retainer, the rod of which is installed in the combined holes of the turbine disk and the sealing ring; - Fig. 13 this fragment B (see Fig. 2), which shows the next stage installation of the retainer - the retainer is rotated 90 degrees relative to the axis of the rod; - Fig. 14 is a longitudinal section L-D (see Fig. 13), which shows the position of the retainer before installing the split ring; - Fig. 15 is a view B (see Fig. 14), which shows the installation of the split ring and the position of the lock before placing it in the groove of the split ring; - Fig. 16 shows a longitudinal section T-T (see Fig. 15), which shows the location of the lock when installing the split ring; - Fig. 17 shows view B (see Fig. 16), which is shown installed lock in the groove of the split ring; - Fig. 18 shows a longitudinal section T-T (see Fig. 17), which shows the finally installed retainer; - Fig. 19 shows view B (see fig. 18), which shows the finally installed lock; - Fig. 20 is a longitudinal section T-T (see Fig. 19) of the final assembly; turbine impeller.

The impeller (see Fig. 1) of the turbomachine contains working vanes 1 installed in the grooves, for example, herringbone, of the disk 2. On the locking part of the working vanes 1 there are protrusions З, which are adjacent to the rear surface of the rim of the disk 2 and thereby fix the working vanes 1 according to arrow A. Disc 2 has a shoulder 4 directed radially to the axis of the disc. A sealing ring 5, which has a lip 6, is also directed radially to the axis of the ring 5 and the disk 2, is installed on the disk 2 with a stop also at the blade 1.

Several holes 7 and one hole 8 are made together in the edge 6 of the sealing ring 5 and in the edge 4 of the disc 2 (see Fig. 1, 2). When installing the sealing ring 5 on the disc 2, they are aligned accordingly. Holes 7 have slots 9 and 10, respectively, open in the direction of the longitudinal axis of the wheel (see Fig. 2). Pins 11 are installed in the holes 7, which fix the sealing ring 5 from turning (Fig. 3).

The split ring 12 of the M-shaped section is installed so that it covers with its vertical walls, directed from the common longitudinal axis, the sides 4 of the disk 2 and 6 of the sealing ring 5. Thus, the ring 12 fixes the sealing ring 5 and the working vanes 1 along the axis (see fig. .1) in the direction of arrow B.

On one wall of the ring 12 (see fig. 4, 5, 6, 7) from the side along arrow A, there is a narrow oblique cut 13, intersecting the radial axis of the ring 12 (see fig. 4). On the other wall of the O-ring 12 opposite the oblique section, view along the arrow B, there is a wide straight groove 14 (see Fig. 5) with sides that are parallel to the radial axis of the ring 12 passing between them. The ring 12 is installed so that the straight groove 14 is directed to the side of the disc 2 and behind its edge 4, and the oblique cut 13 is diagonally within the projection of the straight groove 14 and outwards over the edge 6 of the ring 5, i.e. from the side of arrow A (see Fig. 1 ).

The ring 12 (also according to arrow B) has (see Fig. b) an annular axial protrusion 1:5, which is cut in the area 16 outside the groove 14 in the wall of the split ring of the O-shaped section. Also, the ring protrusion 15 is cut in the area 17 to form a slot for installing a flat lock (see Fig. 5 and 7).

The retainer 18 (see Fig. 8) is made in the form of a rectangular plate. On one surface of the plate and in one of its corners, at the same time and perpendicular to it, a rod 19 of circular cross-section is made. The rod 19 has webs 20, 21, parallel to each other and to one of the sides of the plate 18, under the slots 10 are holes 8 (see Fig. 2).

The rod 19 of the retainer is installed in the hole 8, parallel to the longitudinal axis of the wheel and made at the same time in the common axis, both in the edge 4 and in the edge 6 of the sealing ring 5 (see fig. 1, 17). The rectangular plate 18 is installed in the groove 14 of one of the walls of the O-shaped locking ring 12.

With this, the M-shaped retaining ring 12 is fixed from turning, as well as from moving its ends in the radial direction to the axis.

A flat lock 22 (see Figs. 9, 10) is installed in the gap between the disc 2 and the opposite side of the plate 18 of the retainer (see Fig. 1) to hold the retainer in the axial direction.

The lock 22 (see Fig. 19, 20) has a cutout 23, which is open radially to the longitudinal axis, and on both sides of it there are parts that deform and are also directed radially to the longitudinal axis of the wheel.

The cutout 23 of the lock 22 covers the rectangular plate 18 of the retainer, and the deformable parts of the lock on both sides of the cutout 23 (and therefore the plates 18) are bent in the axial direction and placed under the inner diameter of the O-shaped locking ring (see Fig. 19, 20). At the same time, part of the plate 18 of the retainer protrudes beyond the cutout 23 of the lock 22 radially to the longitudinal axis of the wheel and is placed between the indicated axis and the bent parts of the lock 22.

In the radial direction, the lock 22 is held on one side by the disk 2, on the other side by the axial protrusion 15

O-shaped locking ring 12, located along the longitudinal axis (see Fig. b) on the outer surface of one wall of the split ring 12.

Thus, the whole structure is restrained from movements in the circumferential, radial and axial direction.

The assembly of the turbine wheel begins with the installation of the working blades 1 in the grooves of the disk 2 (see Fig. 1) until they stop with the protrusions Z in the side surface of the rim of the disk 2. Then the sealing ring 5 is installed, while the holes 7 and 8 are on the sides 4 of the disks 2 and 6 rings 5 are combined (see Fig. 2). Pins 11 are inserted into holes 7 (see Fig. 3). Next, the rod 19 of the plate 18 of the retainer is installed in the hole 8, which, thanks to the tabs 20, 21 on the rod 19, freely passes through the slot 10 of the hole 8 (see fig. 11, 12).

Then the rod 19 together with the plate 18 of the retainer is turned by 90", as shown in Fig. 13.

The rod 19 together with the plate 18 of the retainer is moved in the direction of the arrow A until it stops in the web of the disc 2 (see Fig. 14.

The installation of the locking ring 12 is shown in stages in Fig. 15, 16, 17, 18.

It should be noted that the absence of a part of the annular axial projection 15 in the section 16 (see fig. 5, 6, 7). The O-shaped locking ring 12 allows you to install it without touching the plate 18 of the retainer, which is pressed against the disk 2 (see fin 14).

Then the plate 18 of the retainer with the rod 19 is moved by the technological device in the direction of arrow B until it stops in the edge 4 of the disk 2. At the same time, the rectangular plate 18 of the retainer is placed in the straight groove 14 of the split locking ring 12 (see fig. 17, 18).

Then, in the area of the site 17, where a part of the ring protrusion 15 is cut off, a flat lock 22 is introduced (see Fig. 15, 17), which, moving in the circumferential direction, is installed with a slot 23 on the plate 18 of the retainer, after which the part of it that is deformed on both sides of the plate 18 of the retainer by the inner diameter of the ring 12, thereby fixing the lock 22 in the circumferential direction (see fig. 19, 20).

A full-scale experimental sample of the impeller of the proposed design was tested on a gas turbine engine. The design in the production of its parts is technological, and during assembly - disassembly does not cause any difficulties.

The temperature of the wheel rim was 600 degrees Celsius. The maximum stresses determined in the sealing ring in the radius of the transition of the centering edge to the vertical wall were bokg/mm?

At the same time, the high reliability of the claimed device in operation at all standard and forced engine modes was noted. . - Here it is

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