High-temperature-resistant and vibration-resistant blade structure of steam turbine

Abstract

The utility model discloses a turbine high-temperature-resistant anti-vibration blade structure which comprises a blade root, an adapter plate welded to the top of the blade root in a sealed mode, a blade body main body welded to the adapter plate, a blade top welded to the top of the blade body main body in a sealed mode, a plurality of rows of outer flow guide holes formed in the surface of the blade body main body, and a side air inlet formed in one side of the blade body main body. An inner flow guide body is arranged in the blade body, a backflow channel is formed between the inner flow guide body and the blade body, inner flow guide holes are formed in the surface of the inner flow guide body, the bottom of the inner flow guide body is welded to an adapter plate, a cavity is formed in the inner flow guide body, a plurality of adapter ports are formed in the adapter plate, and a through heat dissipation channel is formed in the blade root. The multi-layer combined type heat dissipation fan blade has the advantages that the structural strength is high, the multi-layer combined type structure is adopted, the overall stability is improved, heat dissipation is rapid, and the influence of airflow vibration on the structure is further reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to steam turbine technical field, more specifically, especially relate to a steam turbine high temperature resistant and anti-vibration blade structure. BACKGROUND

[0002] At present, the steam turbine is in high temperature, high speed rotation and complex vibration environment during working. The existing steam turbine blade often is difficult to meet the requirements of high temperature resistance and vibration resistance. In high temperature environment, blade material is prone to performance degradation, such as strength reduction, toughness decline, etc., which will affect the service life of the blade and the overall operation efficiency of the steam turbine. At the same time, due to the vibration caused by high speed rotation of the steam turbine combined with strong airflow, the blade may appear fatigue damage, even fracture and other serious accidents, so as to cause the steam turbine to stop overhauling, increase the maintenance cost and affect the production. The existing blade structure is too single, cannot meet the long-term high-strength rotating operation, and does not have the ability of self-heat dissipation under high speed rotation.

[0003] Therefore, a steam turbine blade structure capable of effectively solving the problems of high temperature resistance and vibration resistance is needed. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a steam turbine high temperature resistant and anti-vibration blade structure to solve the problems in the background art.

[0005] To achieve the above purpose, the utility model discloses the following technical scheme: a steam turbine high temperature resistant and anti-vibration blade structure, comprising a blade root, the blade root top is welded and seals the adapter plate, the adapter plate is welded with the blade body on, the blade body top is welded and seals the blade tip, the blade body surface is provided with a plurality of rows of external flow guide holes, and the air intake heat dissipation is carried out through the plurality of rows of external flow guide holes, the blade body one side is provided with the side air inlet, the blade body is provided with the internal flow guide body, the internal flow guide body and the blade body between being provided with the backflow channel, the internal flow guide body surface is provided with the internal flow guide hole, the internal flow guide body bottom is welded on the adapter plate, the internal flow guide body is provided with the cavity, the adapter plate is provided with a plurality of adapter interfaces, and the cavity is discharged through the airflow of a plurality of adapter interfaces, the blade root is provided with the heat dissipation flow channel that penetrates, the blade root is also provided with the exhaust flow channel, the exhaust flow channel top is connected with the adapter interface, and the bottom is connected with the heat dissipation flow channel.

[0006] As an optional scheme of the utility model, the side air inlet is provided with a shunt hole strip, and the multi-hole shunt is carried out through the shunt hole strip.

[0007] As an optional scheme of the utility model, the heat dissipation flow channel cross section is X-shaped.

[0008] As an optional scheme of the utility model, the blade body has a composite layer structure, and the blade body has, from inside to outside, a high-temperature-resistant alloy base layer, a damping intermediate layer and a wear-resistant and high-temperature-resistant outer layer.

[0009] As an optional scheme of the utility model, the high-temperature-resistant alloy base layer is made of a nickel-based high-temperature-resistant alloy, the damping intermediate layer is a rubber-metal composite structure, and the wear-resistant and high-temperature-resistant outer layer is made of a ceramic material.

[0010] As an optional scheme of the utility model, the blade root adopts a tree-shaped structure, and micro-groove structures are arranged on both sides of the blade root, and the micro-groove structures are filled with high-temperature lubricating grease.

[0011] The utility model provides a kind of steam turbine high-temperature-resistant and anti-vibration blade structure, with the following beneficial effects:

[0012] By designing the blade root of tree-shaped structure, the whole can be more stably installed on the wheel disc, by the form of the blade body main body and the inner flow guide body combination, the strength of the blade body part is improved, to avoid the appearance of fracture deformation, by the side air inlet and the outer flow guide hole air inlet, then combined in the backflow channel and carried out self-adapting flow circulation, by the cavity of the inner flow guide body, airflow is transported to the adapter, finally by exhaust flow channel and enters heat dissipation flow channel, airflow will be along X-shaped flow channel and carried out irregular diffusion buffering, greatly reduce the vibration generated by airflow to the whole, simultaneously and quickly carry out heat dissipation operation. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structural schematic diagram of the utility model;

[0014] Figure 2 It is the partial enlarged view of the utility model;

[0015] Figure 3 It is the front view of the utility model;

[0016] Figure 4 It is the A-A sectional view of the utility model;

[0017] Figure 5 It is the D-D sectional view of the utility model.

[0018] In the drawing: 1, blade root;101, heat dissipation flow channel;102, exhaust flow channel;2, adapter plate;201, adapter hole;3, blade body main body;301, outer flow guide hole;302, side air inlet;303, backflow channel;4, blade tip;5, inner flow guide body;501, inner flow guide hole;6, shunt hole strip. DETAILED DESCRIPTION

[0019] The embodiments of the utility model are further described in detail in combination with the drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

[0020] In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two;The terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. Therefore, it cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0022] Please refer to Figures 1 to 5 The utility model provides a technical scheme: a kind of high-temperature-resistant and anti-vibration blade structure of steam turbine, including blade root 1, blade root 1 top is welded with adapter plate 2, adapter plate 2 is welded with blade body 3, blade body 3 top is welded with blade tip 4, blade body 3 surface is provided with multiple rows of outer flow guide hole 301, and air intake is carried out through multiple rows of outer flow guide hole 301 Heat dissipation, one side of blade body 3 is provided with side air inlet 302, and air intake is carried out when rotating through side air inlet 302, shunt hole strip 6 is arranged in side air inlet 302, and multiple hole shunts are carried out through shunt hole strip 6, inner flow body 5 is arranged in blade body 3, and backflow passage 303 is arranged between inner flow body 5 and blade body 3, for airflow circulation, inner flow body 5 surface is provided with inner flow guide hole 501, and the air in backflow passage 303 is further absorbed and dissipated through inner flow guide hole 501, and inner flow body 5 bottom is welded on adapter plate 2.

[0023] Cavity is arranged in inner flow body 5, and a plurality of adapter interfaces 201 are arranged on adapter plate 2, and the cavity is communicated to carry out airflow exhaust through a plurality of adapter interfaces 201, and heat dissipation flow channel 101 is arranged in blade root 1, and exhaust flow channel 102 is also arranged in blade root 1, and exhaust flow channel 102 top is communicated with adapter interface 201, and bottom is communicated with heat dissipation flow channel 101, and heat dissipation flow channel 101 cross section is X type, and the design of X type flow channel makes the discharged gas release in multiple directions Buffer, further reduce the vibration of airflow to the whole, improve the overall stability.

[0024] AsFigure 4 、 5 As shown in FIG. 1, the blade body has a composite layer structure, and from inside to outside, the blade body has a high-temperature-resistant alloy base layer, a damping intermediate layer and a wear-resistant high-temperature-resistant outer layer in sequence, the high-temperature-resistant alloy base layer is made of a nickel-based high-temperature-resistant alloy, the damping intermediate layer is a rubber-metal composite structure, and the wear-resistant high-temperature-resistant outer layer is made of a ceramic material. The blade root 1 adopts a tree-shaped structure, and micro-groove structures are arranged on both sides of the blade root 1, and the micro-groove structures are filled with high-temperature lubricating grease.

[0025] The specific use mode and role of the embodiment are as follows: the tree-shaped structure of the blade root 1 can more stably install the whole on the wheel disc. In the rotating process, the airflow first enters through the side air inlet 302, and the excess airflow enters through the outer flow guide hole 301, enters the backflow channel 303, and then performs self-adaptive flow circulation, further enters the inner flow guide body 5, and then is transported to the adapter 201 through the cavity of the inner flow guide body 5, and finally enters the heat dissipation flow channel 101 through the exhaust flow channel 102. The airflow will be irregularly diffused and buffered along the X-shaped flow channel, so as to reduce the vibration of the airflow on the whole and quickly perform heat dissipation operation.

[0026] The device embodiments described above are only schematic, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment scheme. Those skilled in the art can understand and implement it without creative labor.

[0027] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A high temperature resistant and vibration resistant blade structure for a steam turbine, characterized by: The application relates to a blade root (1) which is sealed at the top by a transition plate (2), the transition plate (2) is welded with a blade body (3) on the top, the blade body (3) is sealed at the top by a blade tip (4), the surface of the blade body (3) is provided with a plurality of rows of external guide holes (301) for air intake and heat dissipation, one side of the blade body (3) is provided with a side air inlet (302), the blade body (3) is provided with an internal guide body (5), the internal guide body (5) and the blade body (3) are provided with a backflow channel (303), the surface of the internal guide body (5) is provided with internal guide holes (501), the bottom of the internal guide body (5) is welded on the transition plate (2), the internal guide body (5) is provided with a cavity, the transition plate (2) is provided with a plurality of transition ports (201) for connecting the cavity and discharging air flow, the blade root (1) is provided with a penetrating heat dissipation flow channel (101), the blade root (1) is further provided with an exhaust flow channel (102), the exhaust flow channel (102) is connected with the transition port (201) at the top and connected with the heat dissipation flow channel (101) at the bottom.

2. A high temperature resistant and anti-vibration blade structure of a steam turbine according to claim 1, characterized in that: The side air inlet (302) is provided with a shunt hole strip (6) for multi-hole shunting.

3. The high-temperature resistant and anti-vibration blade structure of a steam turbine according to claim 1, characterized in that: The heat dissipation flow channel (101) is in X-shaped section.

4. The high temperature resistant and anti-vibration blade structure of a steam turbine according to claim 1, characterized in that: The blade body has a composite layer structure, and the blade body is sequentially provided with a high-temperature-resistant alloy base layer, a damping intermediate layer and a wear-resistant high-temperature-resistant outer layer from inside to outside.

5. A high temperature resistant and anti-vibration blade structure of a steam turbine according to claim 4, characterized in that: The high-temperature-resistant alloy base layer is made of a nickel-based high-temperature-resistant alloy, the damping intermediate layer is a rubber-metal composite structure, and the wear-resistant high-temperature-resistant outer layer is made of a ceramic material.

6. A high temperature resistant and anti-vibration blade structure of a steam turbine according to claim 1, characterized in that: The blade root (1) adopts a tree-shaped structure, and is provided with a micro-groove structure on both sides of the blade root (1), and the micro-groove structure is filled with high-temperature lubricating grease.

Images