Steam turbine blade with positioning structure

Abstract

The utility model discloses a steam turbine moving blade with positioning structure, including blade profile, blade root and blade tip, and the both ends of blade profile are provided with blade root and blade tip respectively, and the one side of blade root is provided with a plurality of first positioning convex post, and the other side of blade root is provided with a plurality of first positioning hole, and the position of first positioning convex post and first positioning hole is one to one, and the one side of blade tip is provided with second positioning convex post, and the other side of blade tip is provided with second positioning hole, and the position of second positioning convex post and second positioning hole is one to one, the utility model discloses reasonable structure, and the both sides of blade root are provided with first positioning convex post and first positioning hole respectively, and the both sides of blade tip are provided with second positioning convex post and second positioning hole respectively, when installing moving blade, the blade root of two adjacent moving blades is positioned through the cooperation of first positioning convex post and first positioning hole, second positioning convex post and second positioning hole respectively, and the connecting stability between two moving blades is improved greatly.

Description

Technical Field

[0001] This utility model relates to the field of turbine blade technology, specifically a turbine blade with a positioning structure. Background Technology

[0002] A steam turbine, also known as a steam engine, is a rotary steam power unit. High-temperature, high-pressure steam passes through fixed nozzles, becomes an accelerated airflow, and is then injected onto blades, causing a rotor equipped with rows of blades to rotate and perform work. Steam turbines are the main equipment in modern thermal power plants and are also used in the metallurgical industry, chemical industry, and ship propulsion systems. Moving blades are mounted on the rotor impeller or drum, receiving the high-speed airflow ejected from the nozzles and converting the kinetic energy of the steam into mechanical energy, thus rotating the rotor.

[0003] Currently, moving blades, which consist of blade profile, blade root, and blade tip, are generally positioned and matched only by the turbine's shroud during installation. Although they are connected in pairs, wear and tear will occur during long-term use, leading to a decrease in connection stability. Therefore, an improved technology is urgently needed to solve this problem in the existing technology. Utility Model Content

[0004] The purpose of this invention is to provide a turbine blade with a positioning structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a turbine blade with a positioning structure, comprising a blade profile, a blade root, and a blade tip. The blade profile has a blade root and a blade tip at both ends, and a plurality of first positioning protrusions are provided on one side of the blade root, and a plurality of first positioning holes are opened on the other side of the blade root. The positions of the first positioning protrusions and the first positioning holes correspond one-to-one. A second positioning protrusion is provided on one side of the blade tip, and a second positioning hole is opened on the other side of the blade tip. The positions of the second positioning protrusions and the second positioning holes correspond one-to-one.

[0006] Preferably, the present invention provides a turbine blade with a positioning structure, wherein the first positioning protrusion and the corresponding first positioning hole are located on the same axis, and the second positioning protrusion and the corresponding second positioning hole are located on the same axis.

[0007] Preferably, the present invention provides a turbine blade with a positioning structure, wherein the outer ends of the first positioning protrusion and the second positioning protrusion are both chamfered.

[0008] Preferably, the present invention provides a turbine blade with a positioning structure, wherein the outer diameter of the first positioning protrusion is consistent with the inner diameter of the first positioning hole, the outer diameter of the second positioning protrusion is consistent with the inner diameter of the second positioning hole, and an exhaust groove is provided on one side of both the first positioning hole and the second positioning hole.

[0009] Preferably, the present invention provides a turbine blade with a positioning structure, wherein the blade shape is arc-shaped and gradually twists from the root end to the tip end.

[0010] Preferably, the present invention provides a turbine blade with a positioning structure, wherein a first slot is provided at both ends of the blade root.

[0011] Preferably, the present invention provides a turbine blade with a positioning structure, wherein a second slot is provided at one end of the blade tip.

[0012] Preferably, the present invention provides a turbine blade with a positioning structure, wherein both sides of the blade root and blade tip are inclined surfaces.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] A first positioning protrusion and a first positioning hole are respectively provided on both sides of the blade root, and a second positioning protrusion and a second positioning hole are respectively provided on both sides of the blade tip. When the moving blade is installed, the blade roots of two adjacent moving blades are positioned by the cooperation of the first positioning protrusion and the first positioning hole, and the second positioning protrusion and the second positioning hole, which greatly improves the connection stability between the two moving blades. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 For the appendix Figure 1 Schematic diagram of the angle transformation structure;

[0017] Figure 3 For the appendix Figure 2 Enlarged structural diagram of point A in the middle.

[0018] In the figure: 1. Leaf shape; 2. Leaf root; 3. Leaf tip; 4. First positioning protrusion; 5. First positioning hole; 6. Second positioning protrusion; 7. Second positioning hole; 8. Exhaust groove; 9. First slot; 10. Second slot. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] It should be noted that in the description of this utility model, the terms "inner", "outer", "upper", "lower", "both sides", "one end", "the other end", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Please see Figure 1-3 This utility model provides a technical solution: a turbine blade with a positioning structure, including a blade profile 1, a blade root 2, and a blade tip 3. The blade profile 1 has a blade root 2 and a blade tip 3 at both ends. The blade profile 1 is arc-shaped, gradually twisting from the blade root 2 end to the blade tip 3 end to ensure that the blade profile 1 forms an arc-shaped flow channel between pairs of moving blades. The blade root 2 has first slots 9 at both ends to facilitate engagement with the inner shroud of the turbine frame. The blade tip 3 has a second slot 10 at one end to facilitate... In conjunction with the outer shroud of the turbine frame, both sides of the blade root 2 and blade tip 3 are inclined to ensure that the blade roots 2 and blade tips 3 of the two moving blades can fit together smoothly. Several first positioning protrusions 4 are provided on one side of the blade root 2, and several first positioning holes 5 are opened on the other side of the blade root 2. The positions of the first positioning protrusions 4 and the first positioning holes 5 correspond one-to-one. A second positioning protrusion 6 is provided on one side of the blade tip 3, and a second positioning hole 7 is opened on the other side of the blade tip 3. The positions of the second positioning protrusion 6 and the second positioning hole 7 correspond one-to-one.

[0022] The first positioning protrusion 4 and the corresponding first positioning hole 5 are located on the same axis, and the second positioning protrusion 6 and the corresponding second positioning hole 7 are located on the same axis, so as to ensure that when the moving blades are installed, the first positioning protrusion 4 of each pair of moving blades corresponds to and is inserted into the first positioning hole 5, and the second positioning protrusion 6 corresponds to and is inserted into the second positioning hole 7.

[0023] Both the outer ends of the first positioning protrusion 4 and the second positioning protrusion 6 are chamfered so that the first positioning protrusion 4 of one moving blade can be inserted into the first positioning hole 5 of another moving blade, and the second positioning protrusion 6 can be inserted into the second positioning hole 7 of another moving blade.

[0024] The outer diameter of the first positioning protrusion 4 is the same as the inner diameter of the first positioning hole 5, and the outer diameter of the second positioning protrusion 6 is the same as the inner diameter of the second positioning hole 7, so as to ensure the stability of the first positioning protrusion 4 after being inserted into the first positioning hole 5 and the second positioning protrusion 6 after being inserted into the second positioning hole 7. Both the first positioning hole 5 and the second positioning hole 7 are provided with exhaust grooves 8 on one side to ensure the smoothness of the first positioning protrusion 4 when being inserted into the first positioning hole 5 and the second positioning protrusion 6 when being inserted into the second positioning hole 7.

[0025] Processing Method and Operating Principle: First, a blank is prepared, followed by precision machining to form blade profile 1, blade root 2, and blade tip 3. A first positioning protrusion 4 and a second positioning convex shaft are pre-reserved on one side of blade root 2 and blade tip 3, respectively. A first positioning hole 5 and a second positioning hole 7 with an exhaust groove 8 are opened on the other side of blade root 2 and blade tip 3. During assembly, two turbine moving blades are joined side-by-side. Since both sides of blade root 2 and blade tip 3 are inclined, the blade roots 2 and blade tips 3 of two moving blades 1 are tightly connected, allowing the first positioning protrusion 4 of the blade root 2 of one moving blade 1 to insert into the first positioning hole 5 of the blade root 2 of the other moving blade 1, and the second positioning protrusion 6 of the blade tip 3 of one moving blade 1 to insert into the second positioning hole 7 of the blade tip 3 of the other moving blade 1. The first slots 9 at both ends of blade root 2 mate with the inner shroud of the turbine, and the second slot 10 at one end of blade tip 3 mates with the outer shroud of the turbine, completing the installation. This utility model has a reasonable structure. The blade root 2 is provided with a first positioning protrusion 4 and a first positioning hole 5 on both sides, and the blade tip 3 is provided with a second positioning protrusion 6 and a second positioning hole 7 on both sides. When the moving blade 1 is installed, the blade roots 2 of two adjacent moving blades 1 are positioned by the cooperation of the first positioning protrusion 4 and the first positioning hole 5, the second positioning protrusion 6 and the second positioning hole 7, respectively. By adopting the above positioning structure, the connection stability between two moving blades 1 is greatly improved.

[0026] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0027] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A turbine blade with a positioning structure, characterized in that: The blade includes a leaf shape (1), a leaf root (2), and a leaf tip (3). The leaf shape (1) has a leaf root (2) and a leaf tip (3) at both ends. The leaf root (2) has a plurality of first positioning protrusions (4) on one side and a plurality of first positioning holes (5) on the other side. The positions of the first positioning protrusions (4) and the first positioning holes (5) correspond one-to-one. The leaf tip (3) has a second positioning protrusion (6) on one side and a second positioning hole (7) on the other side. The positions of the second positioning protrusions (6) and the second positioning holes (7) correspond one-to-one.

2. The turbine blade with a positioning structure according to claim 1, characterized in that: The first positioning protrusion (4) and the corresponding first positioning hole (5) are located on the same axis, and the second positioning protrusion (6) and the corresponding second positioning hole (7) are located on the same axis.

3. A turbine blade with a positioning structure according to claim 1, characterized in that: The outer ends of the first positioning protrusion (4) and the second positioning protrusion (6) are both chamfered.

4. A turbine blade with a positioning structure according to claim 1, characterized in that: The outer diameter of the first positioning protrusion (4) is the same as the inner diameter of the first positioning hole (5), and the outer diameter of the second positioning protrusion (6) is the same as the inner diameter of the second positioning hole (7). An exhaust groove (8) is provided on one side of both the first positioning hole (5) and the second positioning hole (7).

5. A turbine blade with a positioning structure according to claim 1, characterized in that: The leaf shape (1) is arc-shaped, and the leaf shape (1) gradually twists from one end of the leaf root (2) to one end of the leaf tip (3).

6. A turbine blade with a positioning structure according to claim 1, characterized in that: The leaf root (2) has a first slot (9) at both ends.

7. A turbine blade with a positioning structure according to claim 1, characterized in that: A second slot (10) is provided at one end of the blade tip (3).

8. A turbine blade with a positioning structure according to claim 1, characterized in that: Both sides of the leaf root (2) and leaf tip (3) are inclined surfaces.

Images