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Turbomachine, especially steam turbine

一种涡轮机、汽轮机的技术，应用在机器/发动机、机械设备、发动机元件等方向，能够解决依赖减震性能、连接件固定问题等问题，达到改进接合或连接、扭转减小的效果

Inactive Publication Date: 2010-06-30
GENERAL ELECTRIC TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As stated in the introduction, since the direct coupling limits the relative motion between the blades in operation, less energy is dissipated through friction damping, so the disadvantage of the direct coupling system is its dependence on damping performance
In fact there is another problem that the long final stage blades are subjected to severe torsion in operation and thus large displacements at the blade tips, which lead to problems with the fixation of the joints

Method used

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  • Turbomachine, especially steam turbine
  • Turbomachine, especially steam turbine
  • Turbomachine, especially steam turbine

Examples

Experimental program
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Effect test

Embodiment Construction

[0023] exist figure 1 In , two adjacent blades 1 and 1' are shown, which are for example part of a turbine stage not shown in detail, especially the end stage of the turbine, the blades 1, 1' being the last stage blades of the turbine. The two blades 1 and 1' each have a radially outer end seal 3 or 3', that is to say in the region of the blade tip 2 or 2'. naturally, according to Figures 1 to 5 The seal 3 only represents a possible embodiment, so it should be considered that there are also other designs for the seal 3 , for example in the form of a cover plate.

[0024] figure 1 , two blades 1 and 1' overlap in the area A in the circumferential direction. In this overlapping area A, the connector 4 (according to figure 2 , which has an engaging element 5 and a friction / damping element 6) is arranged between the two blades 1 and 1'. In the installation complete state, figure 1 The sealing member 3 in the blade 1 abuts against one side of the engaging member 5, while th...

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PUM

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Abstract

The invention relates to a turbinemachine, especially a steam turbine. The turbomachine includes a turbine stage having a plurality of blades 1 and 1', wherein the blades 1 and 1' are designed to twist around their radial longitudinal axis in an operating state. In addition, connecting elements 4 and 4' interconnect the two adjacent blades 1 and 1' to each other in a circumferential direction in a region of the respective blade tip. The invention has essential features that the blades 1 and 1' are pretwisted in a direction of twist in a non-operating state and are interconnected through the connecting elements so as to maintain the pretwisting. The invention also relates to a method for forming connection of two adjacent blades 1 and 1' of turbine stage of the turbomachine.

Description

technical field [0001] As stated in the preamble of claim 1 , the invention relates to a turbomachine, in particular a steam turbine, having a turbine stage with a plurality of blades. As stated in the preamble of claim 12, the invention also relates to a method for producing a connection between two adjacent blades of a turbine stage of a turbomachine. Background technique [0002] The turbine stages of conventional turbines, especially the end stages, are constructed shroudless or jointed. In this case, both the direct engagement between the individual turbine blades without additional friction elements and the indirect engagement via friction elements are possible. [0003] With direct engagement, there is usually direct contact between adjacent blades, as is the case for example with support wing connections and cover plate connections. On the one hand, the direct connection leads to a better stiffening of the blade ring, which in most cases results in lower detuning e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/22F01D25/04
CPCF01D5/22Y10T29/49321
Inventor P-A·马赛雷R·亨齐克B·万纳C·耶贝尔
Owner GENERAL ELECTRIC TECH GMBH
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