Turbine blade facilitating balance weight

Abstract

The utility model discloses a steam turbine blade facilitating balance weight, and relates to the field of steam turbine blades. The impeller comprises the impeller body and the blades, each blade comprises the blade root, the first face and the second face, the spherical protruding blocks and the spherical grooves are arranged, the spherical protruding blocks increase the roughness of the first faces, the heat exchange area between the blades and fluid is increased, when steam flows through the blades, the protruding blocks disturb a flow field, the turbulence effect is enhanced, and the heat exchange efficiency is improved. Heat exchange is effectively promoted, so that the working temperature of the blade is reduced, the heat efficiency of the steam turbine is improved, the service life of the blade is prolonged, meanwhile, the design of the spherical protruding blocks can guide steam to flow, flow separation and eddy loss are reduced, the aerodynamic efficiency of the blade is improved, the overall performance of the steam turbine is more stable and efficient, and the service life of the blade is prolonged. The spherical protruding blocks serve as balance weight adjusting points, and fine adjustment of blade balance can be achieved by increasing or reducing the mass of the protruding blocks.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine blades, specifically a steam turbine blade that facilitates balancing and counterweighting. Background Technology

[0002] Steam turbine blades designed for easy balancing are those with specialized balancing structures or counterweight devices. During manufacturing, these blades are designed with the subsequent balancing needs in mind, thus possessing unique design features. The blade root may have specialized counterweight mounting slots or holes, such as dovetail grooves or threaded holes, making the installation and adjustment of counterweights more convenient and enabling precise adjustment of the blade's balance. At the same time, the shape and size of the blade are also designed to meet the balancing needs, reserving a certain amount of weight adjustment space so that the weight distribution of the blade can be adjusted by adding or removing materials in subsequent processes.

[0003] However, existing turbine blades designed for easy balancing have neglected heat transfer due to an overemphasis on aerodynamic performance. As a result, current blades have limited thermal conductivity and cannot quickly transfer the heat generated inside the blade. Over long-term use, this temperature difference will generate thermal stress, which will cause fatigue damage to the blade material, and may even lead to cracks and fractures. At the same time, the operating temperature will continue to rise, thereby accelerating the deterioration of the material and shortening the service life of the blade. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a turbine blade that is easy to balance and counterweight, so as to solve the technical problems of limited thermal conductivity, inability to quickly transfer internal heat, thermal stress caused by long-term temperature difference leading to material fatigue damage, cracks and fractures, and continuous increase in operating temperature accelerating material deterioration and shortening service life.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a turbine blade for convenient balancing includes a wheel body and a blade, wherein the blade includes a blade root, a first surface and a second surface, and a plurality of spherical protrusions are provided on the first surface;

[0006] The second surface is provided with multiple spherical grooves.

[0007] By adopting the above technical solution, this design facilitates the balancing of the counterweight, because the protrusions and grooves can serve as counterweight adjustment points, and the balance of the blades can be adjusted by adding or removing material.

[0008] Furthermore, the wheel body includes a wheel shaft, and an axle is provided at the center of the wheel shaft.

[0009] By adopting the above technical solution, this structure makes the wheel body more stable and can withstand the centrifugal force generated by the blades when rotating at high speed, thus ensuring the safe operation of the steam turbine.

[0010] Furthermore, a blade groove is provided on the outer side of the wheel body, and a blade is installed in the blade groove.

[0011] By adopting the above technical solution, this design makes the blade installation more secure, prevents the blade from falling off during operation, and improves the reliability of the steam turbine.

[0012] Furthermore, the blades are arranged in a ring array at equal intervals.

[0013] By adopting the above technical solutions, this arrangement makes the aerodynamic performance of the steam turbine more superior, reduces flow separation and eddy current losses, and improves the efficiency of the steam turbine.

[0014] Furthermore, the wheel body and blades are made of the same material, and the wheel body and blades are made of titanium alloy.

[0015] By adopting the above technical solution, the turbine body and blades are made of the same material, and titanium alloy is used. Titanium alloy has excellent properties such as high strength, corrosion resistance, and high temperature resistance, which makes the turbine blades more durable and extends the service life of the turbine.

[0016] Furthermore, the blade is fixedly connected to the wheel body via the blade root, and the end of the blade is provided with a blade tip.

[0017] By adopting the above technical solution, the blades are fixedly connected to the turbine body through the blade root. This connection method makes the combination between the blades and the turbine body tighter and improves the stability of the blades. A blade tip is provided at the blade end, and the design of the blade tip can optimize the aerodynamic performance of the turbine.

[0018] Furthermore, the blade tip is configured with an arc-shaped structure.

[0019] By adopting the above technical solution, the blade tip is set with an arc-shaped structure. This design can reduce the frictional resistance between the blade and the fluid during operation, reduce noise and vibration, and improve the smoothness of turbine operation.

[0020] In summary, the present invention has the following main advantages:

[0021] This invention utilizes spherical protrusions and grooves. The spherical protrusions increase the roughness of the first surface, thereby increasing the heat exchange area between the blades and the fluid. When steam flows over the blades, the protrusions disturb the flow field, enhancing turbulence and effectively promoting heat exchange. This reduces the operating temperature of the blades, improves the thermal efficiency of the turbine, and extends the service life of the blades. Furthermore, the spherical protrusions guide steam flow, reducing flow separation and eddy current losses, thus improving the aerodynamic efficiency of the blades and making the overall turbine performance more stable and efficient. In addition, the spherical protrusions serve as counterweight adjustment points; by increasing or decreasing the mass of the protrusions, the blade balance can be achieved. Fine-tuning reduces maintenance costs, while spherical grooves enhance blade stability under high loads by dispersing stress concentration within the blade, improving fatigue resistance and load-bearing capacity. Simultaneously, the grooves alter the blade's natural frequency, preventing resonance with external excitation and absorbing some vibration energy, reducing blade vibration amplitude, noise, and wear caused by vibration, and improving turbine operational stability. Furthermore, spherical grooves can serve as counterweight adjustment points; filling or removing material within the grooves provides greater flexibility and options for blade balance adjustment, making it more precise and efficient. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a rear-view three-dimensional structural diagram of the present invention;

[0024] Figure 3 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0025] Figure 4 For the present utility model Figure 2 Enlarged structural diagram at point B.

[0026] In the diagram: 1. Wheel body; 101. Wheel shaft; 102. Wheel axle; 103. Blade groove; 2. Blade; 201. First surface; 202. Second surface; 203. Blade root; 204. Blade tip; 3. Spherical protrusion; 4. Spherical groove. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] A type of steam turbine blade that facilitates balancing and counterweighting, as shown in Figure 1 to 12. Figure 4As shown, the turbine blade design includes a wheel body 1 and blades 2. Blade 2 includes a blade root 203, a first surface 201, and a second surface 202. The first surface 201 has multiple spherical protrusions 3, and the second surface 202 has multiple spherical grooves 4. This design provides flexible counterweight adjustment points through the spherical protrusions 3 and grooves 4, allowing for easy balancing of the counterweight by adding or removing materials without altering the overall blade structure, thus reducing maintenance costs and time. The turbine blade design includes a wheel body 1 and blades 2. Blade 2 has a blade root 203, a first surface 201, and a second surface 202. The first surface 201 has multiple spherical protrusions 3 arranged in an irregular array; the second surface 202 has multiple spherical grooves 4, also arranged in an irregular array. This design provides flexible counterweight adjustment points through the spherical protrusions 3 and grooves 4, allowing for easy balancing of the counterweight by adding or removing materials without altering the overall blade structure, thus reducing maintenance costs and time.

[0029] See Figure 1 , Figure 4 The turbine body 1 includes a wheel body 101, and an axle 102 is located at the center of the wheel body 101. This structure makes the turbine body 1 more stable and easier to install. The axle 102, as the center of rotation, can withstand the huge centrifugal force generated by the blades 2 when rotating at high speed, ensuring the safe and stable operation of the turbine.

[0030] See Figure 3 , Figure 4 The outer side of the turbine body 101 is provided with blade grooves 103, and blades 2 are installed in the blade grooves 103. This design not only makes the installation of blades 2 more secure and prevents the blades from falling off during operation, but also ensures the accurate relative position between blades 2 through precise groove design, thereby optimizing the aerodynamic performance of the turbine.

[0031] See Figure 1 , Figure 4 The blades 2 are arranged in a ring array with equal and uniform spacing. This arrangement ensures that the fluid flows evenly over each blade 2 during turbine operation, reducing flow separation and eddy current losses, and improving the overall efficiency and stability of the turbine. At the same time, the equal spacing also makes the force distribution among the blades 2 more uniform, extending the service life of the blades.

[0032] See Figure 1 , Figure 2The turbine body 1 and blade 2 are made of the same material, specifically titanium alloy. Titanium alloy possesses excellent properties such as high strength, corrosion resistance, and high temperature resistance, making the turbine blades more durable. This material selection not only improves the overall performance of the turbine but also extends its service life and reduces maintenance and replacement costs.

[0033] See Figure 3 , Figure 4 Blade 2 is fixedly connected to the turbine body 1 via blade root 203. Blade 2 has a blade tip 204 at its end. This connection method ensures a tighter bond between blade 2 and turbine body 1, improving the blade's stability and reliability. Furthermore, the blade tip 204, as the terminal part of the blade, further optimizes the turbine's aerodynamic performance, reducing fluid resistance and losses.

[0034] See Figure 1 , Figure 4 The blade tip 204 has an arc-shaped structure. This arc design allows the fluid to flow more smoothly over the blade tip 204, reducing frictional resistance and turbulence losses between the fluid and the blade tip. At the same time, the arc-shaped blade tip 204 can also effectively reduce the noise and vibration generated by the steam turbine during operation, improving the smoothness and comfort of the steam turbine's operation.

[0035] The implementation principle of this embodiment is as follows: First, the blade 2 is fixedly connected to the blade groove 103 of the wheel body 1 through the blade root 203. This ensures that the blades are arranged in a uniform, equidistant ring array to meet aerodynamic performance requirements. After installation, the entire turbine system is debugged, including checking the blade fixing, the rotational flexibility of the wheel shaft, and the overall system sealing.

[0036] During use, based on the imbalance detection results, the blades and counterweight positions that need to be adjusted are determined. For the design of spherical bump 3 and spherical groove 4, the counterweight can be adjusted by increasing or decreasing the mass of the bumps, or by filling / removing the material in the groove. During the adjustment process, the accuracy of the counterweight must be ensured to avoid negative impacts on the aerodynamic performance and structural strength of the blades.

[0037] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A turbine blade for convenient balancing, characterized in that: It includes a wheel body (1) and a blade (2). The blade (2) includes a blade root (203), a first surface (201) and a second surface (202). The first surface (201) is provided with a plurality of spherical protrusions (3). The second surface (202) is provided with a plurality of spherical grooves (4).

2. The turbine blade for convenient balancing according to claim 1, characterized in that: The wheel body (1) includes a wheel body (101), and an axle (102) is provided at the center of the wheel body (101).

3. The turbine blade for convenient balancing according to claim 2, characterized in that: The outer side of the wheel body (101) is provided with a blade groove (103), and a blade (2) is installed in the blade groove (103).

4. The turbine blade for convenient balancing according to claim 1, characterized in that: The blades (2) are arranged in a ring array at equal intervals.

5. The turbine blade for convenient balancing according to claim 1, characterized in that: The wheel body (1) and the blade (2) are made of the same material, and the wheel body (1) and the blade (2) are made of titanium alloy.

6. The turbine blade for convenient balancing according to claim 1, characterized in that: The blade (2) is fixedly connected to the wheel body (1) through the blade root (203), and the end of the blade (2) is provided with a blade tip (204).

7. The turbine blade for convenient balancing according to claim 6, characterized in that: The blade tip (204) is arranged in an arc shape.

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