Turbine blade with cooling structure

Abstract

The utility model provides a turbine blade with a cooling structure, which belongs to the field of turbine blades and comprises a blade root, a blade body is arranged at the top of the blade root, a cooling cavity is arranged inside the blade body, an arch-shaped blade back is arranged on one side of the blade body, a concave blade surface is arranged on the other side of the blade body, and the concave blade surface is provided with a cooling cavity. A plurality of rows of film holes are formed in the blade back and the blade surface, a ventilation groove is formed in the bottom of the blade root, and the ventilation groove is communicated with the cooling cavity. When the blade is used, cooling airflow is introduced into the cooling cavity through the ventilation grooves, then the cooling airflow in the cooling cavity is jetted to the surface of the blade body through the air film holes at a certain speed and angle, and the airflow forms a layer of uniform cooling air film on the surface of the blade body, so that direct erosion of high-temperature fuel gas is effectively isolated, and the service life of the blade body is prolonged. Due to the existence of the cooling air film, the temperature of the surface of the blade body is reduced, and the problems of thermal stress, corrosion, fatigue and the like are reduced, so that the service life of the blade body is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to turbine blade field, specifically, turbine blade with cooling structure. BACKGROUND

[0002] Generally, gas turbine engine is composed of compressor, combustion chamber and turbine three components, turbine component converts the internal energy of high temperature gas into mechanical energy, at present, turbine blade of gas turbine engine needs to work under high temperature gas, and the temperature is far more than the melting point of base material.

[0003] Through the retrieval, in the prior art, patent announcement number CN207715190U discloses a turbine blade, including the leaf body, the leaf body has the leaf tip and the root, the leaf tip has the leaf tip plane on the top end of the leaf body, the turbine blade is equipped with a concave cavity, the concave cavity is streamline, the concave cavity has an opening, the opening is located on the leaf tip plane, the concave cavity is composed of several arc lines along the part of the cross section of the turbine blade, but still has the following defects:

[0004] When using, the cooling structure of the leaf body itself is not comprehensive, so that the leaf body keeps high temperature state, can not be well cooled externally by airflow, and the service life is reduced.

[0005] Therefore, we improve it, and propose a turbine blade with cooling structure. CONTENT OF UTILITY MODEL

[0006] The utility model aims at: the leaf body itself cooling structure is not comprehensive, so that the leaf body keeps high temperature state, can not be well cooled externally by airflow, and the service life is reduced.

[0007] In order to realize the above-mentioned utility model purposes, the utility model provides the following technical schemes:

[0008] The turbine blade with cooling structure is used to improve the above-mentioned problems.

[0009] The utility model is specifically as follows:

[0010] Including the root, the top of the root is provided with the leaf body, the inside of the leaf body is provided with the cooling cavity, one side of the leaf body is provided with the arched back, the other side of the leaf body is provided with the concave surface, the back and the surface are all provided with multiple rows of air film holes, the bottom of the root is provided with the ventilation groove, and the ventilation groove is communicated with the cooling cavity.

[0011] As the preferred technical scheme of the utility model, the inside of the cooling cavity is provided with the cooling plate, and the shape of the cooling plate is curved.

[0012] As the preferred technical scheme of the utility model, the material of the cooling plate is titanium alloy.

[0013] As the preferred technical scheme of the utility model, the number of the cooling plate is three and is evenly staggered in the inside of the cooling cavity.

[0014] As the preferred technical scheme of the utility model, the air guide hole is arranged on the cooling plate, and the number of the air guide hole is multiple and is evenly distributed on the cooling plate.

[0015] As the preferred technical scheme of the utility model, the through hole is arranged in the inside of the ventilation groove, and the through hole penetrates the blade root to make the ventilation groove communicate with the outside space.

[0016] As the preferred technical scheme of the utility model, the arc-shaped groove is arranged at the top of the blade body, and the air guide strip is fixedly connected in the arc-shaped groove.

[0017] Compared with the prior art, the utility model has the beneficial effects of:

[0018] In the scheme of the utility model,

[0019] By arranging the blade body, the cooling cavity, the blade back, the blade surface, the air film hole and the ventilation groove, the cooling air is introduced into the cooling cavity through the ventilation groove during use, and then the cooling air in the inside of the cooling cavity is sprayed to the surface of the blade body at a certain speed and angle through the air film hole, a uniform cooling air film is formed on the surface of the blade body by these air flows, the direct erosion of the high-temperature combustion gas is effectively isolated, the existence of the cooling air film reduces the temperature of the surface of the blade body, reduces the occurrence of the problems such as thermal stress, corrosion and fatigue, thereby prolonging the service life of the blade body. DRAWINGS

[0020] Figure 1 The structure schematic view of the turbine blade with the cooling structure is provided in the utility model.

[0021] Figure 2 The top view of the turbine blade with the cooling structure is provided in the utility model.

[0022] Figure 3 The turbine blade with the cooling structure is provided in the utility model Figure 2 The sectional structure schematic view of the A-A place is provided in the utility model.

[0023] Figure 4 The front view of the turbine blade with the cooling structure is provided in the utility model.

[0024] Figure 5 The turbine blade with the cooling structure is provided in the utility model Figure 4 The sectional structure schematic view of the B-B place is provided in the utility model.

[0025] Figure 6 The structure diagram of the turbine blade ventilation groove with the cooling structure is provided.

[0026] Indicated in the figure:

[0027] 1, blade root; 2, blade body; 3, cooling cavity; 4, blade back; 5, blade face; 6, film hole; 7, ventilation groove; 8, cooling plate; 9, air guide hole; 10, through hole; 11, arc-shaped groove; 12, air guide strip. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments.

[0029] Therefore, the following detailed description of the embodiments of the utility model is not intended to limit the scope of the claimed utility model, but only represents some embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0030] It should be noted that the embodiments in the utility model and the features and technical schemes in the embodiments can be combined with each other without conflict.

[0031] It should be noted that: similar signs and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0032] As Figures 1-6 shown, the present embodiment proposes a turbine blade with a cooling structure, which comprises a blade root 1, the top of the blade root 1 is provided with a blade body 2, the inside of the blade body 2 is provided with a cooling cavity 3, one side of the blade body 2 is provided with an arched blade back 4, the other side of the blade body 2 is provided with a concave blade face 5, a plurality of rows of film holes 6 are formed on the blade back 4 and the blade face 5, a ventilation groove 7 is formed on the bottom of the blade root 1, the ventilation groove 7 and the cooling cavity 3 are in communication with each other, in use, cooling air is introduced into the cooling cavity 3 through the ventilation groove 7, then the cooling air in the cooling cavity 3 is sprayed to the surface of the blade body 2 at a certain speed and angle through the film holes 6, these air flows form a uniform cooling air film on the surface of the blade body 2, which effectively isolates the direct erosion of high-temperature gas, the existence of the cooling air film reduces the temperature of the surface of the blade body 2, reduces the occurrence of problems such as thermal stress, corrosion and fatigue, thereby prolonging the service life of the blade body 2.

[0033] As Figure 5As shown, a cooling plate 8 is installed inside the cooling chamber 3, and the cooling plate 8 is curved. In use, the curved cooling plate 8 can guide the cooling airflow inside the cooling chamber 3. At the same time, the cooling plate 8 comes into contact with the cooling chamber 3 inside the blade 2, and can absorb the high temperature generated on the surface of the blade 2 and cool it through the cooling airflow inside the cooling chamber 3, thereby improving the cooling effect.

[0034] like Figure 5 As shown, the cooling plate 8 is made of titanium alloy. In use, the titanium alloy cooling plate 8 has high specific strength and corrosion resistance, and is lightweight, thus reducing the weight of the blade 2 while maintaining strength.

[0035] like Figure 5 As shown, there are three cooling plates 8, which are evenly and alternately arranged inside the cooling chamber 3. In use, the three cooling plates 8 work together to significantly improve the cooling effect of the blade 2.

[0036] like Figure 5 As shown, the cooling plate 8 has multiple air guide holes 9 evenly distributed on it. During use, the air guide holes 9 ensure uniform cooling of the cooling plate 8, further enhancing the cooling effect.

[0037] like Figure 3 As shown, the ventilation slot 7 has multiple through holes 10 on its inner side, which penetrate the blade root 1 to connect the ventilation slot 7 with the external space. In use, the multiple through holes 10 allow the cooling chamber 3 to draw in more cooling airflow to cool the blade 2, thereby improving the cooling effect.

[0038] like Figure 3 As shown, an arc-shaped groove 11 is provided at the top of the blade 2, and an air guide strip 12 is fixedly connected inside the arc-shaped groove 11. During use, the arc-shaped groove 11 discharges excess cooling airflow from inside the cooling chamber 3, making it easier to introduce new cooling airflow.

[0039] Specifically, when the turbine blade with the cooling structure is in use: the cooling airflow is introduced into the cooling chamber 3 through the ventilation slot 7, and then the cooling airflow inside the cooling chamber 3 is sprayed onto the surface of the blade 2 through the air film hole 6 at a certain speed and angle. These airflows form a uniform cooling air film on the surface of the blade 2, which effectively isolates the direct erosion of the high-temperature combustion gas. The presence of the cooling air film reduces the temperature of the surface of the blade 2, reduces the occurrence of problems such as thermal stress, corrosion and fatigue, thereby extending the service life of the blade 2.

[0040] All technical features in this embodiment can be freely combined according to actual needs.

[0041] The above embodiment is a preferred implementation scheme of the present application, in addition to this, the present application can be implemented in other ways, and any obvious replacement without departing from the technical scheme concept is within the protection scope of the present application.

Claims

1. A turbine blade with a cooling structure comprising a blade root (1), characterized in that, The top of the blade root (1) is provided with a blade body (2), the inside of the blade body (2) is provided with a cooling cavity (3), one side of the blade body (2) is provided with an arched blade back (4), the other side of the blade body (2) is provided with a concave blade surface (5), a plurality of rows of air film holes (6) are formed in the blade back (4) and the blade surface (5), and the bottom of the blade root (1) is provided with a ventilation groove (7) which is in communication with the cooling cavity (3).

2. The turbine blade with cooling structure according to claim 1, characterized in that, The inside of the cooling cavity (3) is provided with a cooling plate (8), and the shape of the cooling plate (8) is curved.

3. The turbine blade with cooling structure according to claim 2, characterized in that, The material of the cooling plate (8) is titanium alloy.

4. The turbine blade with cooling structure according to claim 2, characterized in that, The number of the cooling plate (8) is three, and the three cooling plates are uniformly staggered in the inside of the cooling cavity (3).

5. The turbine blade with cooling structure according to claim 2, wherein A plurality of air guide holes (9) are formed in the cooling plate (8) and are uniformly distributed on the cooling plate (8).

6. The turbine blade with cooling structure according to claim 1, wherein A plurality of through holes (10) are formed in the inner side of the ventilation groove (7), the through holes (10) penetrate the blade root (1) to make the ventilation groove (7) communicate with the outside space.

7. The turbine blade with cooling structure according to claim 1, wherein An arc-shaped groove (11) is formed in the top of the blade body (2), and a wind guide strip (12) is fixedly connected in the arc-shaped groove (11).

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