Moving blade of reaction steam turbine

Abstract

The utility model belongs to the technical field of steam turbine moving blades, and discloses a reaction type steam turbine moving blade which comprises a moving blade body, a blade crown is arranged at the top of the moving blade body, an arc-shaped mounting groove is formed in one side of the blade crown, limiting protrusions are fixedly arranged on the two sides of the interior of the mounting groove, and a shroud ring is inserted into the mounting groove. Positioning grooves are formed in the positions, corresponding to the limiting protrusions, in the shroud insertion mounting groove, the limiting protrusions are stably inserted into the positioning grooves, the mounting groove is formed in one side of the shroud, the limiting protrusions are arranged on the two sides of the interior of the shroud, and positioning between the shroud and the shroud is achieved in cooperation with the positioning grooves formed in the shroud; by means of the structure, before the shroud ring and the blade shroud are fixedly installed, the positioning function between the blade shroud and the shroud ring on all the moving blade bodies can be achieved, the blade shroud and the shroud ring can be rapidly installed and fixed through the installation assembly, and the installation efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steam turbine moving blades, and in particular relates to a reaction type steam turbine moving blade. Background Art

[0002] A steam turbine, also known as a steam turbine engine, is a rotary steam power device. High-temperature and high-pressure steam passes through a fixed nozzle and becomes an accelerated airflow, which is then sprayed onto the blades, causing the rotor with blade rows to rotate and perform external work. Steam turbines are the main equipment in modern thermal power plants and are also used in the metallurgical industry, chemical industry, and ship power devices. A reaction steam turbine refers to a steam turbine in which steam expands not only in the nozzle but also in the moving blades. The moving blades of a reaction steam turbine are not only subjected to the force generated by the impact of the steam flow, but also to the force generated by the accelerated expansion of steam in the moving blades. .

[0003] At present, the existing reaction steam turbine moving blades are generally installed through the blade crown and the shroud to form a blade group. When installing with the shroud, most of them are fixed and installed with each blade and the shroud in turn by welding or riveting. Whether it is riveting or welding, the shroud needs to be positioned. However, the existing moving blades do not have the positioning function during the installation process, resulting in the need to adjust the position of each blade before riveting or welding with the shroud, which greatly reduces the installation efficiency. For this reason, we propose a reaction steam turbine moving blade. Utility Model Content

[0004] The utility model aims to provide a reaction type steam turbine moving blade to solve the existing problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a reaction type steam turbine moving blade, comprising a moving blade body, a blade crown and a mounting groove, wherein a blade crown is arranged on the top of the moving blade body, an arc-shaped mounting groove is opened on one side of the blade crown, limiting protrusions are fixedly arranged on both sides of the interior of the mounting groove, a circumferential belt is inserted into the interior of the mounting groove, a positioning groove is arranged at a position corresponding to the limiting protrusion when the circumferential belt is inserted into the interior of the mounting groove, and the limiting protrusion is stably inserted into the interior of the positioning groove.

[0006] Preferably, a mounting hole is provided on the surface of the belt, and the mounting hole is provided between two adjacent positioning grooves. A connecting groove is provided on the inner bottom surface and the center position of the top wall of the mounting groove. The connecting groove provided on the top wall of the mounting groove penetrates the top wall of the mounting groove and communicates with the outside world, and the opening position of the connecting groove corresponds to the position of the mounting hole.

[0007] Preferably, a mounting assembly is disposed inside the connecting groove, and the mounting assembly is inserted into the connecting groove at the top of the mounting groove and extends through the mounting hole to the connecting groove at the bottom of the mounting groove.

[0008] Preferably, a blade root is provided at the bottom of the moving blade body, and the blade root is fixedly connected to the moving blade body by welding.

[0009] Preferably, a rotor is provided at the bottom of the blade root, and the blade root is fixedly installed around the rotor at equal intervals.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. By opening a mounting groove on one side of the blade crown and setting limiting protrusions on both sides thereof, the positioning between the shroud and the blade crown is realized in cooperation with the positioning groove opened on the shroud. Before the shroud and the blade crown are fixedly installed, the positioning function between the blade crown and the shroud on all the moving blade bodies can be realized, so that the two can be quickly installed and fixed by using the mounting assembly, which greatly improves the installation efficiency.

[0012] 2. By using the installation components, cooperating with the upper and lower connecting grooves and the installation holes inside the installation groove, the fixed installation between the shroud and the blade crown is achieved to ensure the stability between the shroud and the blade crown after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the belt structure of the utility model;

[0015] Figure 3 It is a schematic diagram of the structure of the moving blade and the blade crown of the utility model.

[0016] In the figure: 1. moving blade body; 2. blade root; 3. blade crown; 4. rotor; 5. shroud; 6. positioning groove; 7. mounting hole; 8. mounting groove; 9. limiting protrusion; 10. connecting groove; 11. mounting assembly. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-3The utility model provides a technical solution for a reactionary steam turbine moving blade: it includes a moving blade body 1, a blade crown 3 and a mounting groove 8, a blade crown 3 is arranged on the top of the moving blade body 1, an arc-shaped mounting groove 8 is opened on one side of the blade crown 3, limiting protrusions 9 are fixedly arranged on both sides of the interior of the mounting groove 8, a shroud 5 is inserted into the interior of the mounting groove 8, a positioning groove 6 is arranged at the position where the shroud 5 is inserted into the interior of the mounting groove 8 corresponding to the limiting protrusion 9, and the limiting protrusion 9 is stably inserted into the interior of the positioning groove 6.

[0019] Specifically, the surface of the belt 5 is provided with a mounting hole 7, and the mounting hole 7 is provided between two adjacent positioning grooves 6. A connecting groove 10 is provided on the inner bottom surface and the center position of the top wall of the mounting groove 8. The connecting groove 10 provided on the top wall of the mounting groove 8 penetrates the top wall of the mounting groove 8 and is connected with the outside world. The position of the connecting groove 10 corresponds to the position of the mounting hole 7.

[0020] Specifically, a mounting assembly 11 is disposed inside the connecting groove 10 . The mounting assembly 11 is inserted into the connecting groove 10 at the top of the mounting groove 8 and extends through the mounting hole 7 to the connecting groove 10 at the bottom of the mounting groove 8 .

[0021] Specifically, a blade root 2 is provided at the bottom of the moving blade body 1, and the blade root 2 is fixedly connected to the moving blade body 1 by welding.

[0022] Specifically, a rotor 4 is disposed at the bottom of the blade root 2 , and the blade root 2 is fixedly installed around the rotor 4 at equal intervals.

[0023] In this embodiment, when installing the moving blade body 1 and the shroud 5, the portion of the shroud 5 with the mounting hole 7 is inserted into the mounting groove 8 on one side of the blade crown 3, and then the positioning groove 6 is aligned with the limiting protrusion 9, so that the portion of the shroud 5 with the positioning groove 6 is completely inserted into the mounting groove 8, so that the mounting hole 7 and the upper and lower connecting grooves 10 on the top wall and bottom surface inside the mounting groove 8 correspond to each other, so as to achieve the purpose of positioning, and finally the mounting component 11 is inserted into the connecting groove 10 at the top of the mounting groove 8, and extends through the mounting hole 7 to the connecting groove 10 at the bottom of the mounting groove 8 to achieve the positioning of the shroud 5. This design enables the positioning function between the blade crown 3 and the shroud 5 on all the moving blade bodies 1 to be achieved before the shroud 5 and the blade crown 3 are fixedly installed, so that the two can be quickly installed and fixed using the mounting component 11, thereby greatly improving the installation efficiency.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reaction steam turbine rotor blade, comprising a rotor blade body (1), a blade crown (3) and a mounting groove (8), characterized in that: A blade crown (3) is arranged at the top of the moving blade body (1), an arc-shaped installation groove (8) is opened on one side of the blade crown (3), limiting protrusions (9) are fixedly arranged on both sides of the interior of the installation groove (8), a shroud (5) is inserted into the interior of the installation groove (8), and a positioning groove (6) is arranged at a position corresponding to the limiting protrusion (9) when the shroud (5) is inserted into the interior of the installation groove (8), and the limiting protrusion (9) is stably inserted into the interior of the positioning groove (6).

2. A reaction steam turbine rotor blade according to claim 1, characterized in that: The surface of the circumferential belt (5) is provided with a mounting hole (7), the mounting hole (7) is provided between two adjacent positioning grooves (6), the inner bottom surface and the center position of the top wall of the mounting groove (8) are provided with a connecting groove (10), the connecting groove (10) provided on the top wall of the mounting groove (8) penetrates the top wall of the mounting groove (8) and communicates with the outside, and the opening position of the connecting groove (10) corresponds to the position of the mounting hole (7).

3. A reaction steam turbine rotor blade according to claim 2, characterized in that: An installation component (11) is arranged inside the connection groove (10); the installation component (11) is inserted into the connection groove (10) at the top of the installation groove (8) and extends through the installation hole (7) to the connection groove (10) at the bottom of the installation groove (8).

4. The reaction steam turbine rotor blade according to claim 1, characterized in that: A blade root (2) is provided at the bottom of the moving blade body (1), and the blade root (2) is fixedly connected to the moving blade body (1) by welding.

5. The reaction steam turbine rotor blade according to claim 4, characterized in that: A rotor (4) is arranged at the bottom of the blade root (2), and the blade root (2) is fixedly installed around the rotor (4) at equal intervals.

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