CN209129679U - A kind of blade axial fixing structure - Google Patents

Abstract

This application discloses a kind of blade axial fixing structures comprising: blade to be fixed；Wheel disc, the blade are connected on the wheel disc with the fixation blade；Front apron and rear baffle, the front apron and rear baffle are arranged in the blade front and rear sides to clamp the blade；Limited block, the limited block are arranged between the wheel disc and rear baffle, for limit the rear baffle in axial direction on movement；And plate is obturaged, the plate of obturaging is arranged between rear baffle and blade, for sealing.The blade axial fixing structure of the application can be realized the axial restraint function of rotor blade, and baffle and seal structure can be separated and be designed, and baffle can be made into rigid structure, and design is simple, and technology easily reaches, operational safety, easy to assembly.

Description

A kind of blade axial fixing structure

Technical field

The application belongs to aero-engine technology field, in particular to a kind of blade axial fixing structure.

Background technique

Mortise structure is generallyd use used in aero-engine, gas turbine between rotor blade and disk to carry out blade Axial restraint.

In the prior art, the structure for fixed rotor blade has three class formation of locking plate, jam plate and baffle.Baffle arrangement one As be connected with disk using bolt, axial restraint blade, or use non-bolt structure needs elastic ring to be consolidated baffle with disk It is fixed.And baffle, bolted mode need the aperture between the adjacent tongue-and-groove of disk, have weakening, and bolt head to the intensity of disk Cold air is stirred with nut, improves the temperature for obturaging gas.Baffle, elastic ring structure are designed for elastic baffle structure , which will play the role of axial obturage simultaneously.Integrated structure design technical requirements are high, and function is not easily accomplished, and tie Structure, material, gas tissue slightly mistake easily go wrong in operation.It is needed with tooling using the scheme of elastic ring by elastic ring It is pressed into the annular groove on disk, is packed into rear baffle 4 and unclamps again elastic ring, assembled complex and needed tooling.

Summary of the invention

The purpose of the application is any of the above-described to solve the problems, such as there is provided a kind of blade axial fixing structure.

The technical solution of the application is: a kind of blade axial fixing structure comprising: blade to be fixed；Wheel disc, it is described Blade is connected on the wheel disc with the fixation blade；Front apron and rear baffle, the front apron and rear baffle are arranged in institute Blade front and rear sides are stated to clamp the blade；Limited block, the limited block are arranged between the wheel disc and rear baffle, are used for Limit the rear baffle in axial direction on movement；And plate is obturaged, the plate of obturaging is arranged between rear baffle and blade, For sealing.

In this application, the wheel disc has an outer end face and the extension higher than the outer end face, in the extension It is upper to have radially to first groove and the second groove in axle center.

In this application, the limited block have the interior end seat that cooperates with the outer end face and the convex block axially extended and Limit film, the convex block are used to cooperate and the circumferentially positioned limited block with second groove, and the limit film is for bending With circumferentially fixed with the rear baffle.

In this application, the limited block is multiple, and multiple limited blocks are spliced to form annulus.

In this application, the rear baffle inner edge has the inner face matched with second groove and is disposed radially Fan groove.

In this application, the rear baffle also has axially disposed protrusion, and the protrusion is for limiting bending state The limit film movement.

The blade axial fixing structure of the application can be realized the axial restraint function of rotor blade, and baffle and obturage knot Structure can be separated and be designed, and baffle can be made into rigid structure, and design is simple, and technology easily reaches, operational safety, easy to assembly.

Detailed description of the invention

In order to illustrate more clearly of technical solution provided by the present application, attached drawing will be briefly described below.It is aobvious and easy Insight, drawings discussed below are only some embodiments of the present application.

Fig. 1 is the blade axial fixing structure schematic diagram of the application.

Fig. 2 is the wheeling disk structure schematic diagram of the application.

Fig. 3 is the standoff features schematic diagram of the application.

Fig. 4 is the circular ring structure schematic diagram that multiple limited blocks of the application form.

Fig. 5 is the rear baffle structural schematic diagram of the application.

Fig. 6 is the axially mounted schematic diagram of rear baffle of the application.

Fig. 7 is the rear baffle circumferential direction scheme of installation of the application.

Fig. 8 is that the limit film of the application uses schematic diagram.

Appended drawing reference:

1- blade；

2- wheel disc, the first groove of 21-, the second groove of 22-, 23- outer end face；

3- front apron；

4- rear baffle, 41- protrusion, 42- fan groove, 43- inner face；

5- obturages plate；

6- limited block, 61- convex block, 62- limit film, end seat in 63-.

Specific embodiment

To keep the purposes, technical schemes and advantages of the application implementation clearer, below in conjunction in the embodiment of the present application Attached drawing, technical solutions in the embodiments of the present application is further described in more detail.

Meeting blade axial restraint to realize, the application devises a clock blade axial fixing structure, as shown in Figure 1, Blade axial fixing structure include blade 1 to be fixed, for fixed blade 1 wheel disc 2, be distributed in 1 front and rear sides (gas of blade Stream direction) front apron 3 and rear baffle 4, obturage plate 5 and limited block 6, blade is mounted on wheel disc 2 with fixed blade 1, front Plate 3 and rear baffle 4 are arranged in 1 front and rear sides of blade to clamp blade 1, and limited block 6 is arranged between wheel disc 2 and rear baffle 4, use In limitation rear baffle 4 in axial direction on movement, obturage plate 5 be arranged between rear baffle 4 and blade 1.

As shown in Fig. 2, wheel disc 2 have an outer end face 23 and the extension higher than outer end face 23, on extension radially to Axle center (engine axle center) is provided with two kinds of grooves of uniformly distributed size, i.e. the first groove 21 and the second groove 22, and the first groove 21 is used Rear baffle 4 is allowed to pass through when assembly, the second slot is engaged with for 61 side of convex block on limited block 6, circumferential for baffle Limit.

As shown in figure 3, limited block 6 is fan block, there is the interior end seat 63 cooperated with outer end face 23, and be equipped with along axial direction Extend and for the circumferential bent limit with the convex block 61 of the contact anti-rotation of wheel disc 2 and for axial restraint rear baffle 4 Piece 62, limit film 62 can be circumferentially fixed with rear baffle 4 after bending.

As shown in figure 4, limited block 6 be it is multiple, multiple limited blocks 6 can array at an annulus circle.

As shown in figure 5, rear baffle 4 is used to limit the axial position of blade 1, inner rim has inner face 43, and on inner edge It is radially away from axis and is provided with uniformly distributed fan groove 42, and the convex block for circumferential anti-rotation is set in the axial direction in rear baffle 4 41, protrusion 41 can limit the movement of rear baffle 4 in 62 state into a bent shape of limit film.

Furthermore in this application, obturaging plate 5 is sector, and lower end is crushed in the annular groove of 4 outer rim of rear baffle, and upper end is pressed in leaf On the left of the attachment rib of sealing teeth below piece listrium, limitation blade axial movement can be assisted, and play the role of sealing gas.

As shown in Figure 6 to 8, first by blade 1, (front apron 3 is connected using traditional bolt herein on wheel disc 2 when assembly Binding structure is connected with wheel disc 2), then fill limited block 6, by the second groove 22 that convex block 61 is fitted on wheel disc 2 to guarantee to limit Position block 6 cannot be moved circumferentially, and will be obturaged plate 5 and be swung on suitable position.It is packed into rear baffle 4 later, when dress, which pays attention to choosing, closes Suitable angle enables the inner face 43 of rear baffle 4 be directed at the first groove 21 on wheel disc 2, and the axial rear baffle 4 that is pushed into is to guarantee It is packed into, (X-direction in Fig. 6) compresses rear baffle 4 forward, enters rear baffle 4 in first groove 21 of wheel disc, keeps off after rotating later Plate 4 makes the radial projection part on 4 radial protrusion part of rear baffle (part between i.e. adjacent two fan groove 42) and wheel disc 2 (part between adjacent two first groove 21) is axially coincident, to guarantee 4 axial restraint of rear baffle.Finally bend on limited block 6 Limit film 62, so that it is blocked the convex block on rear baffle 4, so that rear baffle 4 be made not to be able to rotate.

The blade axial fixing structure of the application has the advantages that

1) assembly is more convenient, does not need the assembly that elastic ring is completed using tooling；

2) convex block on limited block and bent limit film have carried out circumferential limit to rear baffle, prevent rear baffle and wheel disc It relatively rotates, adds frictionally anti-rotation in baffle arrangement scheme more stable than traditional elastic ring；

3) it increases and obturages hardened structure, auxiliary limitation blade axial movement, and play the role of sealing gas.

4) baffle and seal structure, which can separate, designs, and baffle can be made into rigid structure, and design is simple, and technology easily reaches, fortune Row safety.

The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any Within the technical scope of the present application, any changes or substitutions that can be easily thought of by those familiar with the art, all answers Cover within the scope of protection of this application.Therefore, the protection scope of the application should be with the scope of protection of the claims It is quasi-.

Claims (6)

1. a kind of blade axial fixing structure, which is characterized in that including

Blade (1) to be fixed；

Wheel disc (2), the blade are connected on the wheel disc (2) with the fixation blade (1)；

Front apron (3) and rear baffle (4), the front apron (3) and rear baffle (4) setting the blade (1) front and rear sides with Clamp the blade (1)；

Limited block (6), the limited block (6) are arranged between the wheel disc (2) and rear baffle (4), for limiting the rear gear Plate (4) in axial direction on movement；And

It obturages plate (5), described obturage plate (5) are arranged between rear baffle (4) and blade (1).

2. blade axial fixing structure as described in claim 1, which is characterized in that the wheel disc (2) has an outer end face (23) and be higher than the outer end face (23) extension, on the extension have radially to first groove (21) in axle center With the second groove (22).

3. blade axial fixing structure as claimed in claim 2, which is characterized in that the limited block (6) have with it is described outer The interior end seat (63) of end face (23) cooperation and the convex block (61) and limit film (62) that axially extend, the convex block (61) for Second groove (22) cooperation and the circumferentially positioned limited block (6), the limit film (62) for bend with it is described after Baffle (4) is circumferentially fixed.

4. blade axial fixing structure as claimed in claim 3, which is characterized in that the limited block (6) is multiple, Duo Gesuo It states limited block (6) and is spliced to form annulus.

5. blade axial fixing structure as described in claim 3 or 4, which is characterized in that rear baffle (4) inner edge have with Second groove (22) inner face (43) matched and the fan groove (42) being disposed radially.

6. blade axial fixing structure as claimed in claim 5, which is characterized in that the rear baffle (4) also has along axial direction The protrusion (41) of setting, the protrusion (41) are used to limit the movement of the limit film (62) of bending state.