Turbine blade combined partition plate

Abstract

The utility model discloses a steam turbine blade combined partition plate which comprises a main body module. The main body module comprises two symmetrically-arranged inner partition plate bodies, two symmetrically-arranged outer partition plate bodies, stationary blades, locking pieces and bolts, wherein one ends of the stationary blades are embedded in the inner partition plate bodies in a sliding mode, and the other ends of the stationary blades are embedded in the outer partition plate bodies in a sliding mode; the locking pieces are symmetrically arranged on the two sides of the inner partition plate bodies; the inner partition plate body and the outer partition plate body are both arranged in a semi-ring mode, a rotating shaft can penetrate through the inner partition plate body and the outer partition plate body conveniently, meanwhile, cylinders are fixed to the ends of the inner partition plate body and the outer partition plate body on one side, inserting grooves are formed in the ends of the inner partition plate body and the outer partition plate body on the other side, and the cylinders are embedded in the inserting grooves, so that stable butt joint between the opposite inner partition plate body and the opposite outer partition plate body is guaranteed, and shaking is avoided. The steam turbine blade combined partition plate has the advantages that the stationary blade is convenient to maintain, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine diaphragms, and specifically relates to a steam turbine blade combined diaphragm. Background Technique

[0002] A steam turbine diaphragm is a circular plate-shaped component installed in a steam turbine cylinder and separating the cylinder into several chambers with different pressures. Its main function is to install nozzles or stationary blades and prevent inter-stage steam leakage. When the steam working medium flows through the nozzles installed on the diaphragm, its potential energy is converted into kinetic energy, the pressure decreases, the speed increases, and then it enters the moving blades to do work. The diaphragm is installed in the groove on the inner wall of the cylinder, generally divided into upper and lower halves, straddling the rotating shaft, and the rotating shaft passes through its center. The diaphragm bears the load generated by the pressure difference during operation. The diaphragm working in the high-pressure part is under the action of high-temperature and high-pressure steam, and the diaphragm working in the low-pressure part is under the action of wet steam.

[0003] The stationary blades on the steam turbine diaphragm are usually fixedly connected to the diaphragm by welding. During operation, due to the long-term impact of high temperature and high pressure on the stationary blades, and since both the stationary blades and the diaphragm are integrally formed, whether the stationary blades or the diaphragm are damaged or deformed, the whole needs to be replaced, resulting in waste of overall materials and high replacement costs. Therefore, there is room for improvement. Content of the Utility Model

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] For this reason, the technical solution adopted by the utility model is as follows: a steam turbine blade combined diaphragm, comprising: a main body module, the main body module includes two symmetrically arranged inner diaphragm bodies, two symmetrically arranged outer diaphragm bodies, stationary blades with one end slidably fitted on the inner diaphragm body and the other end slidably fitted on the outer diaphragm body, locking members symmetrically arranged on both sides of the inner diaphragm body, and bolts arranged in a circular array and passing through the locking members and meshing with the inner diaphragm body.

[0006] The stationary blade is composed of a blade body and columnar protrusions integrally fixed on both sides of the blade body.

[0007] The locking member includes an inner ring plate arranged on one side of the inner diaphragm body, support rods fixed on the outer side of the inner ring plate in a circular array, and an outer ring plate fixed on the outer side of the support rods.

[0008] The utility model can be further configured in a preferred example as follows: a positioning block is fixed on the inner diaphragm body, a positioning hole is opened on the inner side of the inner ring plate, and the positioning block is fitted with the positioning hole.

[0009] In a preferred embodiment, the present utility model can be further configured as follows: cylinders are fixed to the ends of the inner partition body and the outer partition body on one side, and slots are formed at the ends of the inner partition body and the outer partition body on the other side, and the cylinders are fitted into the slots.

[0010] In a preferred embodiment, the present utility model can be further configured as follows: threaded grooves are formed in an annular array on both sides of the inner partition body, round holes are formed in an annular array on the inner ring plate, and the bolts pass through the round holes and are engaged in the threaded grooves.

[0011] In a preferred embodiment, the present utility model can be further configured as follows: inner grooves are formed in an annular array on the outer side of the inner partition body, outer grooves are formed in an annular array on the inner side of the outer partition body, and the columnar protrusions on both sides of the vane pump body are fitted with the inner grooves and the outer grooves.

[0012] In a preferred embodiment, the present utility model can be further configured as follows: inner hexagonal grooves are formed in the bolts.

[0013] By adopting the above technical solutions, the beneficial effects achieved by the present utility model are as follows:

[0014] 1. In the present utility model, a plurality of inner grooves are formed in an annular array on the outer side of the inner partition body, and a plurality of outer grooves are formed in an annular array on the inner side of the outer partition body. One end of the stationary vane is fitted into the inner groove, and the other end is fitted into the outer groove. Through the above arrangement, each stationary vane can be installed and disassembled separately, so that when it is damaged, the damaged stationary vane can be replaced separately, reducing the maintenance cost of the steam turbine partition and improving the practical performance.

[0015] 2. In the present utility model, locking members are arranged on both sides of the inner partition body and the outer partition body. The locking members are fixed to the inner partition body by bolts. Through the arrangement of the locking members, it can be ensured that the stationary vane is stably fitted between the inner partition body and the outer partition body, ensuring the stability of the stationary vane during operation. At the same time, the locking members are fixed by bolts, which is convenient for installation and disassembly. In addition, the locking members can lock the inner partition body and the outer partition body to prevent them from shifting, further increasing the practical performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is an exploded structural diagram of the present utility model;

[0018] Figure 3 is a bottom-up exploded structural diagram of the present utility model.

[0019] Reference Numerals:

[0020] 100. Main body module; 110. Inner partition body; 111. Inner groove; 112. Positioning block; 113. Cylinder; 114. Slot; 115. Threaded groove; 120. Outer partition body; 121. Outer groove; 130. Static blade; 131. Blade body; 132. Columnar protrusion; 140. Locking member; 141. Inner ring plate; 1411. Positioning hole; 1412. Round hole; 142. Support rod; 143. Outer ring plate; 150. Bolt. Detailed implementation manner

[0021] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with the specific implementation manners and with reference to the attached drawings. It should be noted that, without conflict, the embodiments of the present utility model and the features in the embodiments can be combined with each other.

[0022] Some embodiments of the present utility model will be described below with reference to the attached drawings.

[0023] Embodiment 1:

[0024] Combined with Figures 1-3 As shown, this embodiment provides a combined diaphragm for a steam turbine blade, including: a main body module 100.

[0025] Among them, the main body module 100 includes two symmetrically arranged inner partition bodies 110, two symmetrically arranged outer partition bodies 120, a static blade 130 with one end slidably fitted on the inner partition body 110 and the other end slidably fitted on the outer partition body 120, locking members 140 symmetrically arranged on both sides of the inner partition body 110, and bolts 150 arranged in a circular array and meshing with the inner partition body 110 through the locking members 140.

[0026] Both the inner partition body 110 and the outer partition body 120 are semi-circularly arranged to facilitate the rotation shaft to pass through. At the same time, cylinders 113 are fixed at the ends of one side of the inner partition body 110 and the outer partition body 120, and slots 114 are opened at the ends of the other side of the inner partition body 110 and the outer partition body 120. The cylinders 113 are fitted in the slots 114 to ensure stable docking between the relative inner partition body 110 and the relative outer partition body 120 and avoid shaking.

[0027] The static blade 130 is used to play a guiding role and is composed of a blade body 131 and columnar protrusions 132 integrally fixed on both sides of the blade body 131. Inner grooves 111 are arranged in a circular array on the outer side of the inner partition body 110, and outer grooves 121 are arranged in a circular array on the inner side of the outer partition body 120. The columnar protrusions 132 on both sides of the blade pump body are fitted with both the inner grooves 111 and the outer grooves 121, which facilitates the installation and disassembly of the blade body 131, that is, it is convenient to directly replace a damaged blade body 131, avoiding the trouble of replacing the entire diaphragm.

[0028] The locking member 140 is used to limit and fix the stationary blade 130. The locking member 140 includes an inner ring plate 141 disposed on one side of the inner partition body 110, support rods 142 fixedly arranged in an annular array on the outer side of the inner ring plate 141, and an outer ring plate 143 fixed on the outer side of the support rods 142. A positioning block 112 is fixed on the inner partition body 110. Meanwhile, a positioning hole 1411 is formed on the inner side of the inner ring plate 141. The positioning block 112 is fitted with the positioning hole 1411 to limit the locking member 140 and ensure that the support rods 142 coincide with the ends of the stationary blade 130.

[0029] In addition, threaded grooves 115 are formed in an annular array on both sides of the inner partition body 110, and circular holes 1412 are formed in an annular array on the inner ring plate 141. Bolts 150 pass through the circular holes 1412 and engage in the threaded grooves 115 to fix the locking member 140 to the inner partition body 110, ensuring the limit and fixation of the stationary blade 130, and at the same time facilitating the installation and disassembly of the locking member 140.

[0030] The working principle and usage process of the present utility model: When in use, when a certain stationary blade 130 is damaged, the bolts 150 on one side of the locking member 140 are disassembled, the locking member 140 is removed, and the damaged stationary blade 130 is slid out from the inner partition body 110 and the outer partition body 120. A new stationary blade 130 is replaced, and one end of it is fitted into the inner groove 111 and the other end is fitted into the outer groove 121 to complete the installation of the stationary blade 130. Then, the locking member 140 is pressed against the inner partition body 110, and the positioning hole 1411 on the inner ring plate 141 is fitted with the positioning block 112 on the inner partition body 110. The bolts 150 are passed through the circular holes 1412 on the inner ring and engaged in the threaded grooves 115 on the inner partition body 110, and the locking member 140 can be fixed on the inner partition body 110 to limit and fix the stationary blade 130.

[0031] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and purpose of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A combined diaphragm for steam turbine blades, comprising: The main body module (100), characterized in that the main body module (100) includes two symmetrically arranged inner partition bodies (110), two symmetrically arranged outer partition bodies (120), a stationary blade (130) with one end slidably fitted on the inner partition body (110) and the other end slidably fitted on the outer partition body (120), locking members (140) symmetrically arranged on both sides of the inner partition body (110), and bolts (150) arranged in an annular array and passing through the locking members (140) and engaging on the inner partition body (110); The stationary blade (130) is composed of a blade body (131) and columnar protrusions (132) integrally fixed on both sides of the blade body (131); The locking member (140) includes an inner ring plate (141) arranged on one side of the inner partition body (110), support rods (142) fixedly arranged in an annular array on the outer side of the inner ring plate (141), and an outer ring plate (143) fixed on the outer side of the support rods (142).

2. The combined diaphragm of a steam turbine blade according to claim 1, characterized in that, A positioning block (112) is fixed on the inner partition body (110), a positioning hole (1411) is opened on the inner side of the inner ring plate (141), and the positioning block (112) is fitted with the positioning hole (1411).

3. A combined diaphragm of steam turbine blades according to claim 1, characterized in that, Cylinders (113) are fixed at the ends of one side of the inner partition body (110) and the outer partition body (120), and slots (114) are opened at the ends of the inner partition body (110) and the outer partition body (120) on the other side, and the cylinders (113) are fitted in the slots (114).

4. A combined diaphragm for steam turbine blades according to claim 1, characterized in that, Thread grooves (115) are opened in an annular array on both sides of the inner partition body (110), round holes (1412) are opened in an annular array on the inner ring plate (141), and the bolts (150) pass through the round holes (1412) and engage in the thread grooves (115).

5. A combined diaphragm for steam turbine blades according to claim 1, characterized in that, Inner grooves (111) are opened in an annular array on the outer side of the inner partition body (110), outer grooves (121) are opened in an annular array on the inner side of the outer partition body (120), and the columnar protrusions (132) on both sides of the blade pump body are fitted with the inner grooves (111) and the outer grooves (121).

6. The steam turbine blade combined diaphragm according to claim 1, characterized in that, Inner hexagonal grooves are opened on the bolts (150).

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