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Blade arrangement

A technology of blades and damping elements, applied in the directions of supporting elements of blades, preventing leakage, and other chemical processes, etc., can solve the problems of reducing the vibration load of blade devices, etc.

Inactive Publication Date: 2009-09-23
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This dampens the vibrations and overall leads to a reduction in the vibration load on the blade arrangement

Method used

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  • Blade arrangement
  • Blade arrangement

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Embodiment Construction

[0016] figure 1 A schematic sectional view of a blade arrangement 1 according to the invention is shown in a section perpendicular to the rotor axis. This sectional view shows two blade platforms 3 of adjacent blades of a blade arrangement 1 according to the invention. The blades are suspended on the rotor disk of the blade arrangement 1 and have a small distance from one another. Two damping elements 5 , 7 are loosely arranged between the two blade platforms 3 . The two damping elements 5 , 7 form a damper group and are axially configured as rods, wherein the damping element 7 has a quarter-circular cross section and the damper 5 has a wedge-shaped cross section.

[0017] The undersides of the two blade platforms 3 form friction surfaces 9 , 11 . The two damping elements 5 , 7 are pressed against said friction surfaces 9 , 11 as a result of centrifugal force when the rotor (not shown) rotates. The friction surfaces 9, 11 now form specific angles δ and ε with the plane for...

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Abstract

The invention relates to a blade arrangement (1), having a rotor and having a plurality of blades (17) arranged at the periphery of the rotor, wherein a plurality of damping elements (5, 7) are arranged in series in the peripheral direction of the rotor between the blades (17) of at least one blade pair which is formed from two adjacent blades (17), and wherein adjacent damping elements (5, 7) come into contact in the event of a rotation of the rotor about a rotor axis as a result of a centrifugal force acting in the radial direction, and wherein the damping elements (5, 7) are also designed and arranged in series in the peripheral direction of the rotor such that the contact region is an areal contact region.

Description

technical field [0001] The invention relates to a blade arrangement having a rotor and a plurality of blades arranged on a rim along the circumference of the rotor, wherein at least two damping elements are arranged one behind the other along the circumference of the rotor at two directly adjacent between the blades, and wherein, due to the centrifugal force acting in the radial direction, when the rotor rotates around the rotor axis, adjacent damping elements contact each other, and one of the two damping elements is in contact with the two of the blades One is in contact and the other damping element is in contact with the other of the two said vanes. Background technique [0002] It is known that blade arrangements used in turbomachines, such as gas turbines, are equipped with damping elements. The damping element serves to damp undesired bending and torsional vibrations that occur during turbine operation due to different excitations. In this way, HCF damage due to hig...

Claims

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Application Information

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IPC IPC(8): F01D5/22F01D11/00
CPCY10S416/50F01D11/008F01D5/22F05D2250/23F05D2250/231F05B2250/23F05B2250/231
Inventor 安德烈亚斯·凯泽
Owner SIEMENS AG
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