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A device for loading and measuring excitation force of damping blade of naval steam turbine

A technology of measuring device and exciting force, which is applied in the direction of safety devices, blade supporting elements, mechanical equipment, etc., can solve the problem of low validity of measurement results, achieve the effect of reducing the influence of additional stiffness, reducing interference, and wide application range

Active Publication Date: 2020-08-04
NO 719 RES INST CHINA SHIPBUILDING IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing steam turbine damping blade excitation force loading and measuring device has the problem of low validity of the measurement results

Method used

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  • A device for loading and measuring excitation force of damping blade of naval steam turbine
  • A device for loading and measuring excitation force of damping blade of naval steam turbine
  • A device for loading and measuring excitation force of damping blade of naval steam turbine

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Embodiment Construction

[0029] The invention provides a device for loading and measuring the excitation force of the damping blade of a ship steam turbine, which has nothing to do with the type of the turbine blade and has a wide application range. The compression spring is used to load the blade with the excitation force, which can effectively reduce the impact of the excitation force loader on the blade. The resulting additional stiffness ensures the authenticity and stability of the exciting force waveform transmitted to the blade. The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Such as figure 1 As shown, the present invention provides a device for loading and measuring the exciting force of damping blades of a marine steam turbine, including a loading device and a measuring device.

[0031] The loading device comprises a function signal generator 3, a power amplifier 4, an electromagnetic exciter 5 and an ex...

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Abstract

The invention discloses a ship turbine damping blade excitation force loading and measuring device. The ship turbine damping blade excitation force loading and measuring device comprises a loading device and a measuring device and is characterized in that the loading device comprises a function signal generator, a power amplifier, an electromagnetic exciter and an excitation force loader which aresequentially connected, one side of the excitation force loader is provided with a pressure spring and fixed with the output end of the electromagnetic exciter in a threaded manner, and the other side of the excitation force loader is fixedly connected with the profile central position of a to-be-measured blade through a loading flange; the measuring device comprises a dynamic force sensor mounted on the excitation force loader and a data collector and computer which are connected with the dynamic sensor. The ship turbine damping blade excitation force loading and measuring device has the advantages that certain-frequency and certain-amplitude excitation force load can be continuously and stably applied to the damping blade and measured, and the device can be used in the vibration featuretests of blades of various shapes; excitation force loading direction can be adjusted to be consistent with actual conditions; interference, generated during excitation force loading, to the blade can be lowered greatly; the authenticity and stability of excitation force waveforms transmitted to the blade can be guaranteed.

Description

technical field [0001] The invention relates to a vibration characteristic test of a ship steam turbine damping blade, in particular to an excitation force loading and measuring device for a ship steam turbine damping blade. Background technique [0002] The blade is the core heat-to-power conversion part of the ship steam turbine. It undergoes mechanical vibration under the action of the airflow excitation force. The high cycle fatigue caused by the huge vibration stress is one of the main reasons for the failure of the blade. During the experimental research on the frictional damping vibration mechanism of the long blades of the low-pressure stage of the high-power naval steam turbine, the size of the cross-section of the blade and the direction of torsion vary greatly along the height of the blade, and the blade body part has the geometric characteristics of three-dimensional variable cross-section torsion , which makes it quite difficult to apply a continuous and stable ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D21/00F01D25/06F01D5/10F01D5/26
CPCF01D5/10F01D5/26F01D21/003F01D25/06
Inventor 吴君王苇林原胜柳勇代路赵振兴柯志武
Owner NO 719 RES INST CHINA SHIPBUILDING IND
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