CN114109511A

CN114109511A - Novel disk center connecting structure and double-spoke-plate turbine disk with same

Info

Publication number: CN114109511A
Application number: CN202111342707.7A
Authority: CN
Inventors: 张倩; 郭秩维; 李守秋; 栾永先; 李国杰
Original assignee: AECC Shenyang Engine Research Institute
Current assignee: AECC Shenyang Engine Research Institute
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-03-01
Anticipated expiration: 2041-11-12
Also published as: CN114109511B

Abstract

The utility model belongs to aeroengine turbine dish field, in particular to novel heart connection structure of dish and have its double spoke board turbine dish. The method comprises the following steps: a front disc (1) and a rear disc (2). Boss structures are uniformly arranged at the center of the front disk (1) along the circumferential direction; the rear disc (2) and the front disc (1) are welded at the disc edges by diffusion welding, and are connected at the disc center by a plurality of circumferentially discontinuous check blocks (3), and the check blocks (3) are arranged between two adjacent boss structures. The utility model provides a novel heart of a plate connection structure and have its two spoke board turbine dish on having guaranteed the basis of former air vent function, obviously improve two spoke board turbine dish's reliability and life, because dog circumference is discontinuous, space between the dog has cut off the route that dog circumference passed power simultaneously for cooling gas gets into the dish chamber, thereby has reduced the risk that the dog takes place the structural damage.

Description

Novel disk center connecting structure and double-spoke-plate turbine disk with same

Technical Field

The utility model belongs to aeroengine turbine dish field, in particular to novel heart connection structure of dish and have its double spoke board turbine dish.

Background

At present, China is developing a key technology pre-research of an engine with a high thrust-weight ratio, which puts higher requirements on a new generation of aircraft engines: greater thrust, lower jet temperatures, lower fuel consumption and higher thrust-to-weight ratios. The design requirements improve the load level of the existing engine and worsen the working environment of the engine. The turbine component is used as a hot end component of an aircraft engine, and is in a working environment with high temperature, high load, high rotating speed and high power for a long time, and the working condition is very harsh, wherein the turbine disk is the most important rotor key component in the turbine component. The new generation of aircraft engines requires turbine components capable of withstanding higher temperatures with higher tangential velocities, which multiplies the load of the turbine disk as a force-bearing member. Under the action of high centrifugal force and high temperature environment, the contradiction between the structural weight of the turbine rotor and the strength reserve of the turbine rotor is excited. Key technical researches on the design of a lightweight and low-inertia turbine rotor structure are urgently needed to relieve the contradiction between high temperature and high rotating speed and limited material bearing capacity.

The conventional turbine disk is a very mature technical means at present, but is limited to the application potential of the conventional turbine disk, and technical innovation is necessary for realizing further breakthrough. The double-radial-plate turbine disc has obvious advantages in the aspects of structural force transmission route, AN2 value improvement and fatigue failure reduction compared with the conventional turbine disc, and simultaneously has mechanical properties and structural weight reduction, and can further improve the thrust-weight ratio of AN engine and the critical rotating speed value of a rotor. The hub connection structure is an important feature of the design of the double-radial-plate turbine disk structure. In the aspect of structural function, the disk center connecting structure not only realizes the function of air entrainment, but also introduces cooling air into the double-spoke plate cavity to play a role in cooling the spoke plate; and the two radial plates are required to be axially supported, so that the axial rigidity of the radial plates is increased, and the local stress level of the radial plates is reduced.

The existing double-spoke plate turbine disk core mostly adopts a structure of 'disk core welding + vent hole', and the structure has the problem that the vent hole is easy to damage. In the working process of the engine, with the continuous rise of the rotating speed, the radial plates on the two sides tend to be close to the middle, so that larger axial pressing force is brought to the vent holes; in addition, because the disk center is of a welded structure, the vent holes can generate larger radial deformation along with the disk center of the turbine disk during the working process, and larger tensile stress is brought to the vent holes. In the two aspects, the structure of 'disk center welding + vent hole' becomes the weak part of the double-spoke turbine disk.

Accordingly, a technical solution is desired to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.

Disclosure of Invention

The utility model aims at providing a novel heart of a plate connection structure and have its two radial plate turbine disks to solve at least one problem that prior art exists.

The technical scheme of the application is as follows:

a first aspect of the present application provides a novel hub connection structure, including:

the disc center of the front disc is uniformly provided with boss structures along the circumferential direction;

the rear disc and the front disc are welded at the disc edge by adopting diffusion welding, the disc center is connected by a plurality of circumferentially discontinuous check blocks, and the check blocks are arranged between two adjacent boss structures.

In at least one embodiment of this application, the radial outside of dog is provided with first couple, and the radial inboard is provided with the second couple, the dog passes through first couple and the second couple articulates on the front disc.

In at least one embodiment of the present application, the boss structures and the stoppers are all uniformly arranged in 20 along the circumferential direction.

A second aspect of the present application provides a double-radial-plate turbine disk comprising the novel hub connection structure as described above.

The invention has at least the following beneficial technical effects:

the utility model provides a novel heart of a plate connection structure can obviously improve the reliability and the life of two spoke board turbine discs, through the circumference discontinuous structure of dog, has cut off the route that dog circumference passed power to the risk that the dog takes place structural damage has been reduced.

Drawings

FIG. 1 is a schematic view of a novel hub connection configuration according to one embodiment of the present application;

FIG. 2 is a schematic view of a boss configuration at the hub of a front disk according to one embodiment of the present application;

FIG. 3 is a view from direction K of FIG. 2;

FIG. 4 is a schematic view of a stop according to an embodiment of the present application;

FIG. 5 is an exploded view of a double radial plate turbine disk according to one embodiment of the present application.

Wherein:

1-front disc; 2-rear disc; 3-a block.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present application and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present application.

The present application is described in further detail below with reference to fig. 1 to 5.

A first aspect of the present application provides a novel hub connection structure, including: a front disc 1 and a rear disc 2.

Specifically, as shown in fig. 1, boss structures are uniformly arranged at the center of the front disk 1 along the circumferential direction; the rear disk piece 2 and the front disk piece 1 are welded at the disk edge by diffusion welding, and are connected at the disk center by a plurality of circumferentially discontinuous stop blocks 3, and the stop blocks 3 are arranged between two adjacent boss structures.

The utility model provides a novel heart connection structure, preceding disc 1 and back disc 2 only adopt the diffusion welding together in the rim department, and the heart department provides axial support for radials and the heart of a disc through assembling a plurality of discontinuous dogs 3 of circumference.

According to the novel disk center connecting structure, in a parking state, small gaps are reserved between the stop block 3 and the front disk sheet 1 and between the stop block 3 and the rear disk sheet 2; during operation, along with the rotation speed is higher and higher, two radials compress tightly dog 3 gradually. In addition, the front disk 1 has a boss structure at the assembling position, and plays a role of limiting the circumferential direction of the stop block 3. In this embodiment, as shown in fig. 4, a first hook is provided on the radial outer side of the stopper 3, a second hook is provided on the radial inner side, and the stopper 3 is hooked on the front disk 1 by the first hook and the second hook to prevent the stopper 3 from coming off when the engine is stopped and rotating at a low speed.

In one embodiment of the present application, the boss structures and the stoppers 3 are uniformly provided in 20 numbers in the circumferential direction.

A second aspect of the present application provides a double-radial-plate turbine disk, which has the novel disk hub connection structure as described above, and the specific structure is shown in fig. 5.

The utility model provides a novel heart of a plate connection structure and have its two spoke board turbine discs, its heart of a plate has adopted the structure of "the heart does not weld + the discontinuous dog of circumference". The problem that the ventilation holes of the disc center of the double-spoke plate disc are easy to damage and the service life of the double-spoke plate disc is short in the prior art can be solved. The reliability and the service life of the double-spoke-plate turbine disc are obviously improved on the basis of ensuring the function of the original vent hole. Because the dog circumference is discontinuous, the space between the dog provides the passageway for cooling gas gets into the dish chamber, has cut off the route that the dog circumference passed power simultaneously to the risk that the dog takes place structural damage has been reduced.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A novel connection structure of a disk center is characterized by comprising:

the disc comprises a front disc (1), wherein boss structures are uniformly arranged at the center of the front disc (1) along the circumferential direction;

the disc comprises a rear disc (2), the rear disc (2) and the front disc (1) are welded at the disc edge by diffusion welding, the disc center is connected by a plurality of circumferentially discontinuous check blocks (3), and the check blocks (3) are arranged between two adjacent boss structures.

2. The novel disk center connecting structure is characterized in that a first hook is arranged on the radial outer side of the stop block (3), a second hook is arranged on the radial inner side of the stop block, and the stop block (3) is hung on the front disk (1) through the first hook and the second hook.

3. The novel hub connection according to claim 2, wherein the boss structure and the stopper (3) are uniformly arranged in the circumferential direction by 20.

4. A double-radial-plate turbine disk, comprising a novel hub connection structure according to any one of claims 1 to 3.