Dynamic stiffness test system for large high-speed dynamic balancer oscillating frame

A high-speed dynamic balancing and testing system technology, applied in static/dynamic balance testing, vibration testing, machine/structural component testing, etc. Wide, simple test device and high test accuracy

Inactive Publication Date: 2005-04-27
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, from the test results, below 2000RPM, the measured dynamic stiffness coherence coefficient is relatively poor, and the reliability is low, and for some ultra-high-power power generation systems, the working speed is below 2000RPM

Method used

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  • Dynamic stiffness test system for large high-speed dynamic balancer oscillating frame
  • Dynamic stiffness test system for large high-speed dynamic balancer oscillating frame
  • Dynamic stiffness test system for large high-speed dynamic balancer oscillating frame

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Embodiment Construction

[0012] Such as figure 1 As shown, the present invention comprises: power hammer 1, acceleration sensor 2, charge amplifier 3,4, signal analyzer 5, and its connection relation is: power hammer 1 is separately arranged, and power hammer 1 has force sensor 6, and power hammer 1 knock the bearing seat 7, the acceleration sensor 2 is arranged on the bearing seat 7, the signal output terminals of the force sensor 6 and the acceleration sensor 2 of the hammer are respectively connected to the input terminals of the respective charge amplifiers 3 and 4, and the signal outputs of the charge amplifiers 3 and 4 The output terminal is connected to the input terminal of the signal analyzer 5 .

[0013] The acceleration sensor 2 adopts B&K high-precision acceleration sensor, its frequency range is 0.1Hz-1kHz, the sensitivity is 666pC / g, and it can measure the vibration of 0.00002ms-2. The signal analyzer 5 adopts a DP data acquisition and analysis system.

[0014] The output terminals of ...

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Abstract

The present invention relates to vibration measurement. The dynamic swinging frame rigidity measurement system for large high speed dynamic balance machine includes force hammer, acceleration sensor, charge amplifier and signal analyzer. The force hammer with force sensor is set separately and knocks the bearing seat during measurement, the acceleration sensor is set on the bearing seat, the force sensor and the acceleration sensor have their outputs connected separately to the inputs of charge amplifier, the charge amplifier has its output connected to the input of the signal analyzer. The present invention is simple, easy in operation, fast and reliable, and is suitable for in-situ measurement of harsh environment especially.

Description

technical field [0001] The invention relates to a dynamic testing system, in particular to a dynamic stiffness testing system of a pendulum frame of a large-scale high-speed dynamic balancing machine, which is used in the technical field of vibration testing. Background technique [0002] With the rapid development of my country's national economy and the substantial improvement of people's lives, the demand for energy, especially electric power, is becoming more and more urgent, and the demand for high-power, overloaded, medium and high-end steam turbine generator sets is increasing day by day. How to ensure the safe operation of high-power turbogenerator sets is an urgent task to be solved in the current rotor dynamic balance test, and at the same time, higher requirements are put forward for the pendulum of the original rotor dynamic balance test bench. The pendulum is the installation basis of each main assembly of the rotor dynamic balance test bench, and is the main lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M1/14G01M7/02
Inventor 李鸿光静波韩雪华孟光刘岩萨本佶
Owner SHANGHAI JIAO TONG UNIV
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