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A test and calibration bench for shafting strain measurement system

A technology of strain measurement and calibration platform, which is applied in the field of strain testing, can solve the problems of lack of methods and means of system calibration, and achieve the effects of simple structure, accurate determination of support point positions, and reduced requirements for axis alignment

Active Publication Date: 2020-08-18
NO 719 RES INST CHINA SHIPBUILDING IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

my country's research on the use of strain measurement methods in the field of ship shafting alignment has not yet entered the stage of engineering promotion, and there is also a lack of methods and means for system calibration

Method used

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  • A test and calibration bench for shafting strain measurement system
  • A test and calibration bench for shafting strain measurement system
  • A test and calibration bench for shafting strain measurement system

Examples

Experimental program
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Embodiment Construction

[0020] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0021] as attached image 3 As shown, the present invention provides a test and calibration bench for a shafting strain measurement system. The calibration bench includes a rotating shaft 1 , an elevation adjustment device 2 , a weight 3 , a platform 4 and a strain measurement system 5 .

[0022] Rotating shaft 1 is a solid shaft with equal diameter. The diameter range of the shaft can be φ40mm~φ100mm, and the diameter tolerance is required to be (0~0.02)mm. The outer surface of the shaft is marked with scale marks to determine the axial position. The zero point can be defined as Any end face. One end of the rotating shaft 1 is provided with a chuck to ensure that the axial position of the rotating shaft will not be affected during manual cranking.

[0023] Such as figure 1 As shown, the elevation adjustment device 2 is composed of a support 6, an adjus...

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Abstract

The invention discloses a test calibration rack of a shafting strain measurement system. The calibration rack comprises a rotating shaft, elevation adjusting devices, a weight, a platform and a strainmeasuring system; the rotating shaft is horizontally supported on the platform through more than two elevation adjusting devices, the strain measuring system is installed on the rotating shaft, the state of each elevation adjusting device in the initial state is a standard linear correcting state, rotating shaft state parameters in the linear correcting state is obtained through a resolving method, and the measurement result of the strain measurement system is compared with the analysis calculation result to determine the measurement accuracy of the system under the straight line correction state; and the height change amount of the elevation adjusting device relative to the linear correcting state is adjusted, and the hanging position of the weight on the rotating shaft is adjusted, theanalysis result of any calibration state is obtained through calculation, then the measurement result of the strain measurement system is compared with the analysis calculation result, and finally themeasurement accuracy of the system under any calibration state is determined.

Description

technical field [0001] The invention relates to a calibration bench for a strain measurement system, in particular to a test calibration bench for a rotor bending strain measurement system, and belongs to the technical field of strain testing. Background technique [0002] According to the mechanics of materials, by measuring the bending strain of the rotor, the stress and bending moment at the measurement section can be obtained. Combined with the theoretical analysis model, the parameters such as the shear force of the measurement section and the bearing force of the support point can be further obtained according to the principle of force and moment balance. In this way, the alignment state of the rotor is obtained, which is used to inspect and monitor the installation and actual operation of the rotor. The strain-based measurement method for ship shafting alignment has been widely used abroad, not only for shipbuilding but also for ship repair. The shafting alignment gu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/32G01M5/00G01M13/00
CPCG01B21/042G01B21/047G01B21/32G01M5/0058G01M13/00
Inventor 杨俊
Owner NO 719 RES INST CHINA SHIPBUILDING IND
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