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Mushroom-shaped blade root, steam turbine blade and steam turbine

A steam turbine blade, steam turbine technology, applied in the direction of machine/engine, blade supporting element, mechanical equipment, etc., can solve the problems of pressure difference on both sides and the reduction of blade stability, so as to reduce the pressure difference, improve the axial thrust, ensure The effect of stability

Pending Publication Date: 2018-11-06
CHINA CHANGJIANG ENERGY CORP GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a fungus-type blade root to solve the problem in the prior art that the pressure difference between the two sides of the steam turbine blade connected by the fungus-type blade root is relatively large, and the stability of the blade is challenged during long-term operation, thereby reducing the life of the whole machine technical issues
[0006] The purpose of the present invention is also to provide a steam turbine blade to solve the problem in the prior art that the pressure difference between the two sides of the steam turbine blade connected by the fungus-shaped blade root is relatively large, and the stability of the blade is challenged during long-term operation, thereby reducing the service life of the whole machine. technical problem
[0007] The purpose of the present invention is also to provide a steam turbine to solve the problem in the prior art that the pressure difference between the two sides of the steam turbine blade connected by the fungus-shaped blade root is relatively large, and the stability of the blade is challenged during long-term operation, thereby reducing the life of the whole machine. question

Method used

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  • Mushroom-shaped blade root, steam turbine blade and steam turbine

Examples

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Effect test

Embodiment 1

[0030] see figure 1 , this embodiment provides a fungus-type leaf root, including a root body 1, a root wheel groove 2 is arranged on the root body 1, the root wheel groove 2 opens downward, and the front and the front of the root wheel groove 2 The rear two ends are open, that is, the root wheel groove 2 is a groove that runs through the front and rear ends and is open on the ground. The left and right groove surfaces of the root wheel groove 2 are respectively provided with wheel flange protrusions 21 . The front and rear sides of the root body 1 are respectively provided with balance grooves 3, and the balance grooves 3 are arranged on the root body 1 above the root wheel groove 2 and / or the balance grooves 3 are arranged on On the root body 1 corresponding to the upper part of the root wheel groove 2 .

[0031] It should be noted that the above-mentioned front, back, left, and right are all descriptions for illustrating relative positional relationships, and the front and...

Embodiment 2

[0053] This embodiment provides a steam turbine blade, and the bottom of the steam turbine blade is integrally connected with the mushroom-shaped blade root described in the first embodiment above. That is to say, the steam turbine blade in this embodiment is provided with the fungus-shaped blade root in the first embodiment, and the entire steam turbine blade is of an integral structure.

[0054] Specifically, the steam turbine blade includes a fungus-shaped blade root and a leaf body arranged on the upper part of the blade root.

[0055] The fungus-type leaf root comprises a root body 1, and the root body 1 is provided with a root wheel groove 2, and the root wheel groove 2 opens downward and the front and rear ends of the root wheel groove 2 are opened, and the root wheel groove 2 is opened. The left and right groove surfaces of the root wheel groove 2 are respectively provided with flange protrusions 21 . The front and rear sides of the root body 1 are respectively provid...

Embodiment 3

[0059] This embodiment provides a steam turbine, the rotor of which is connected with the steam turbine blade described in the second embodiment.

[0060] Specifically, the steam turbine blade includes a fungal root and a leaf body arranged on the upper part of the root. The fungus-type leaf root comprises a root body 1, and the root body 1 is provided with a root wheel groove 2, and the root wheel groove 2 opens downward and the front and rear ends of the root wheel groove 2 are opened, and the root wheel groove 2 is opened. The left and right groove surfaces of the root wheel groove 2 are respectively provided with flange protrusions 21 . The front and rear sides of the root body 1 are respectively provided with balance grooves 3, and the balance grooves 3 are arranged on the root body 1 above the root wheel groove 2 and / or the balance grooves 3 are arranged on On the root body 1 corresponding to the upper part of the root wheel groove 2 . The shape of the leaf body and th...

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Abstract

The invention relates to the technical field of steam turbine equipment and discloses a mushroom-shaped blade root, a steam turbine blade and a steam turbine. The mushroom-shaped blade root comprisesa root body, wherein a root wheel groove is formed in the root body and is opened downwards; openings are formed in the front end and the rear end of the root wheel groove; wheel flanges are respectively arranged on the left groove side and the right groove side of the root wheel groove; balancing grooves are respectively formed in the front side and the rear side of the root body; the balancing grooves are formed in the root body above the root wheel groove and / or the balancing grooves are formed in the root body corresponding to the upper middle part of the root wheel groove. Through the mushroom-shaped blade root, the pressure difference between two sides of the blade connected with the mushroom-shaped blade root is reduced on the basis that the strength of the wheel flanges is reduced;the stability of the blade is ensured; the axial thrust of the overall steam turbine is improved; and the service life of the overall steam turbine is prolonged.

Description

technical field [0001] The invention relates to the technical field of steam turbine equipment, in particular to a fungus-type blade root, a steam turbine blade and a steam turbine. Background technique [0002] The steam turbine, also known as the steam turbine engine, is a rotary steam power device. The high-temperature and high-pressure steam passes through the fixed nozzle to become an accelerated air flow and then sprays onto the blades, so that the rotor equipped with blade rows rotates and works externally at the same time. Steam turbines are the main equipment of modern thermal power plants, and are also used in metallurgical industry, chemical industry, and ship power plant. [0003] The rotor and moving blades of the steam turbine are the main moving parts. When the rotor is running at high speed, the part that fixes the moving blades on the rotor is the blade root. The common root forms are inverted T shape, outsourcing T shape, double inverted T shape, fork shap...

Claims

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Application Information

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IPC IPC(8): F01D5/30F01D5/12
CPCF01D5/12F01D5/30
Inventor 张权韩方亮王开拓王达君彭博蒋贤耀乐谦张智睿
Owner CHINA CHANGJIANG ENERGY CORP GROUP
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