Turbine blade resistant to oxidation and carbonization

Abstract

The utility model discloses an anti-oxidation carbonization turbine blade which comprises a connecting shaft, and the inner wall of the connecting shaft is connected with a blade structure in a sliding mode. The blade structure comprises a connecting plate, and a sliding block is fixedly connected to the outer wall of the bottom of the connecting plate. According to the blade structure, by means of the wing knives arranged on the outer wall of the blade shell, boundary layer airflow can be disturbed in the rotating process of the blade, formation of separation vortexes can be restrained, and therefore aerodynamic resistance is reduced, and the service life of the blade is prolonged. Meanwhile, when external particles impact the blades, the winged knives serve as rigid barriers to bear impact preferentially and play a role in protecting the blade shell body, the blade structures are connected to the connecting shaft through the sliding blocks and the rubber blocks, and when the blades rotate at a high speed, the rubber blocks absorb vibration energy through elastic deformation; and the vibration amplitude is reduced by utilizing the damping characteristic of the blade, so that the problem of fatigue fracture caused by long-term vibration of the blade is effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to turbine blade technical field, concretely is an oxidation carbonization turbine blade. BACKGROUND

[0002] With the continuous improvement of the performance requirement of turbine engine in the field of aerospace, energy power and the like, the turbine blade needs to be operated stably for a long time under the extreme working conditions of high temperature, high pressure, high rotating speed and complex airflow impact, and the structure and material of the traditional turbine blade have been difficult to meet the demand.

[0003] In the prior art, the traditional turbine blade has some deficiencies in aerodynamic efficiency and impact resistance, and the vortex generated by the airflow separation on the blade surface can significantly increase the aerodynamic resistance and reduce the turbine efficiency, and meanwhile, the inhaled sand particles, combustion products and other foreign particles in the working process can easily cause impact damage to the blade surface and shorten the service life of the blade. UTILITY MODEL CONTENT

[0004] (I) technical problem solved

[0005] In view of the deficiencies of the prior art, the utility model provides an oxidation carbonization turbine blade, which solves the problem that the traditional turbine blade is easy to inhale sand particles, combustion products and other foreign particles in the running process and is easy to cause impact damage to the blade.

[0006] (II) technical scheme

[0007] In order to achieve the above purpose, the utility model is realized by the following technical scheme:

[0008] An oxidation carbonization turbine blade, comprising: a connecting shaft, the inner wall of the connecting shaft being slidably connected with a blade structure; the blade structure comprising a connecting plate, the outer wall of the bottom of the connecting plate being fixedly connected with a sliding block, the outer wall of the top of the sliding block being fixedly connected with a blade shell and a blade core, and the material of the blade shell being nickel-based high-temperature alloy, and the material of the blade core being nickel-based alloy reinforced ceramic particles.

[0009] Preferably, the inner wall of the blade shell is fixedly connected with the outer wall of the blade core, the blade shell adopts nickel-based high-temperature alloy material, which has the characteristics of high temperature resistance, high strength and good oxidation resistance, the blade shell surface naturally forms an oxidation film to block the diffusion of oxygen, and the blade core adopts nickel-based alloy reinforced ceramic particle material as an internal support structure, which improves the creep resistance of the blade through the dispersion strengthening effect of the ceramic particles.

[0010] Preferably, the outer wall of the blade shell is fixedly connected with wing knives, and the wing knives are vertically arranged along the outer wall of the blade shell.

[0011] Preferably, the outer wall of the bottom of the sliding block is fixedly connected with rubber blocks, and the rubber blocks are vertically arranged along the outer wall of the bottom of the sliding block.

[0012] Preferably, the inner wall of the connecting shaft is slidably connected with the outer walls of the sliding block and the rubber block, and the rubber block at the bottom of the sliding block serves as an elastic buffer element to absorb vibration energy through elastic deformation of the rubber when the blade rotates at a high speed.

[0013] Preferably, the sliding blocks are arranged in a circular array at the center of the axis of the connecting shaft, and the connecting shaft is connected with an external driving shaft to drive the blade structure to operate.

[0014] (Three) beneficial effects

[0015] The utility model provides a kind of anti-oxidation carbonization turbine blade.It has the following beneficial effects:

[0016] (One), the blade shell, through the wing knife of outer wall, can disturb boundary layer airflow in the process of blade rotation, inhibit the formation of separation vortex, thereby reduce aerodynamic drag, improve the aerodynamic efficiency of turbine as a whole, simultaneously, when foreign particles impact blade, wing knife as rigid barrier preferentially withstands impact, protects the main body of blade shell, reduces the damage of particle to blade surface, improves the tolerance and safety of blade under complex working condition.

[0017] (Two), the blade structure, through the sliding block and rubber block connection on connecting shaft, when blade rotates at a high speed, rubber block absorbs vibration energy by virtue of elastic deformation, and reduces vibration amplitude by using its damping characteristics, effectively avoids fatigue fracture problem caused by long-term vibration of blade, improves the structural reliability and operating stability of blade. DETAILED DESCRIPTION

[0018] Figure 1 It is the overall structure schematic diagram of the utility model;

[0019] Figure 2 It is the structure schematic diagram of the blade structure of the utility model;

[0020] Figure 3 It is the structure schematic diagram of the sliding block of the utility model;

[0021] Figure 4 It is the structure schematic diagram of the utility model section.

[0022] In the figure: 1, connecting shaft; 2, blade structure; 21, connecting plate; 22, sliding block; 23, rubber block; 24, blade shell; 25, blade core; 26, wing knife. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Please refer to Figures 1-4 The utility model provides a kind of technical scheme: an oxidation-resistant carbonized turbine blade, comprising: connecting shaft 1, the inner wall of connecting shaft 1 is slidably connected with blade structure 2;Blade structure 2 includes connecting plate 21, the outer wall of the bottom of connecting plate 21 is fixedly connected with sliding block 22, the outer wall of the top of sliding block 22 is fixedly connected with blade shell 24 and blade core 25, and the material of blade shell 24 uses nickel-based superalloy, and the material of blade core 25 uses nickel-based alloy reinforced ceramic particles.

[0025] The inner wall of blade shell 24 is fixedly connected with the outer wall of blade core 25, blade shell 24 uses nickel-based superalloy material, and its characteristics are high temperature resistance, high strength, good oxidation resistance, the inherent characteristics of nickel-based superalloy, oxidation film is formed on the surface of blade shell 24 naturally, oxygen diffusion is blocked, blade core 25 uses nickel-based alloy reinforced ceramic particle material as internal support structure, and the anti-creep performance of blade is improved by the dispersion strengthening effect of ceramic particles.

[0026] The outer wall of blade shell 24 is fixedly connected with wing knife 26, and wing knife 26 is arranged vertically along the outer wall of blade shell 24, when blade rotates, wing knife 26 disturbs boundary layer airflow, suppresses the formation of separation vortex, reduces aerodynamic drag, and when foreign particles are inhaled, wing knife 26 acts as a rigid barrier to preferentially withstand impact, which can protect blade shell 24 from damage to some extent.

[0027] The outer wall of the bottom of sliding block 22 is fixedly connected with rubber block 23, and rubber block 23 is arranged vertically along the outer wall of the bottom of sliding block 22.

[0028] The inner wall of connecting shaft 1 is slidably connected with the outer wall of sliding block 22 and rubber block 23, and rubber block 23 at the bottom of sliding block 22 acts as an elastic buffer element, which absorbs vibration energy by elastic deformation of rubber when blade rotates at high speed.

[0029] Sliding block 22 is arranged in a ring array at the center point of the axis of connecting shaft 1, and connecting shaft 1 is connected with an external driving shaft to drive blade structure 2 to operate.

[0030] In use, the connecting shaft 1 serves as a support base for the blade, the inner wall of which is connected to the blade structure 2 through the sliding block 22 on the connecting plate 21, the connecting shaft 1 is connected to an external driving shaft, and the rubber block 23 at the bottom of the sliding block 22 serves as an elastic buffer element, which absorbs vibration energy through the elastic deformation of the rubber when the blade rotates at high speed, and reduces the vibration amplitude by utilizing the damping characteristics of the rubber, thereby avoiding fatigue fracture of the blade;

[0031] The leaf shell 24 is made of nickel-based high-temperature alloy material, which has the characteristics of high temperature resistance and high strength, and good oxidation resistance, and the surface of the leaf shell 24 naturally forms an oxide film to block the diffusion of oxygen, and when the blade rotates, the wing knife 26 disturbs the boundary layer airflow and suppresses the formation of separation vortex, thereby reducing the aerodynamic resistance, and when foreign particles are sucked in, the wing knife 26 acts as a rigid barrier to preferentially withstand impact, which can to some extent protect the main body of the leaf shell 24 from damage.

[0032] The leaf core 25 is made of nickel-based alloy reinforced ceramic particle material, which serves as an internal support structure, and the creep resistance of the blade is improved through the dispersion strengthening effect of the ceramic particles.

[0033] It should be noted that the relational terms herein, such as first and second, are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or equipment including the element.

[0034] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An oxidation-resistant carbonized turbine blade characterized by, Include: The inner wall of the connecting shaft (1) is slidingly connected with the blade structure (2); The blade structure (2) includes a connecting plate (21), the outer wall of the bottom of the connecting plate (21) is fixedly connected with a sliding block (22), the outer wall of the top of the sliding block (22) is fixedly connected with a leaf shell (24) and a leaf core (25).

2. An oxidation resistant carbonized turbine vane according to claim 1, wherein: The inner wall of the leaf shell (24) is fixedly connected with the outer wall of the leaf core (25).

3. An oxidation resistant carbonized turbine vane as in claim 1, wherein: The outer wall of the leaf shell (24) is fixedly connected with a wing knife (26), and the wing knife (26) is vertically arranged along the outer wall of the leaf shell (24).

4. The oxidation resistant carbonized turbine vane of claim 1, wherein: The outer wall of the bottom of the sliding block (22) is fixedly connected with a rubber block (23), and the rubber block (23) is vertically arranged along the outer wall of the bottom of the sliding block (22).

5. The oxidation resistant carbonized turbine vane of claim 1, wherein: The inner wall of the connecting shaft (1) is slidingly connected with the outer wall of the sliding block (22) and the rubber block (23).

6. The oxidation resistant carbonized turbine vane of claim 1, wherein: The sliding block (22) is arranged in a circular array at the center point of the connecting shaft (1).

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