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A test system and test method for the static clearance field of a rotating machine

A test method and technology of rotating machinery, applied in measuring devices, instruments, electrical devices, etc., can solve problems such as less research on measurement and animation display

Active Publication Date: 2019-04-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on the measurement and animation display of the rotational static gap field of the entire rotating machine using these measurement methods

Method used

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  • A test system and test method for the static clearance field of a rotating machine
  • A test system and test method for the static clearance field of a rotating machine
  • A test system and test method for the static clearance field of a rotating machine

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Experimental program
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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] The rotary machine selected in this embodiment is an aero-engine rotor tester with casing. Such as figure 1 The test system for the rotary-static gap field of the rotating machine shown in the aeroengine rotor tester includes a rotor 1 and a stator 2; one end face of the shaft of the rotor 1 is connected to a motor 4 through a nylon rope coupling 3, and the motor 4 drives the rotor 1 to rotate. On the rotor 1 and the stator 2, several radial sections are selected as the test surfaces; an eddy current displacement sensor 5 is respectively installed horizontally and vertically outside the circumference of each test surface, and the eddy current displacement sensor 5 is fixed by a bracket. To obtain the horizontal and vertical displacements of the rotor 1 and stator 2 test surfaces respectively.

[0033] Set a key phase signal point at the key groove of the roto...

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Abstract

The invention discloses a test system and test method of a rotating machinery rotor-stator rim field. The system comprises a rotation machine, a data collector, a rotation speed detection device, and an eddy current displacement sensor. Through arranging a key phase signal point on the key groove of a rotating machinery rotor and arranging eddy current displacement sensors at the test surface peripheral outside horizontal and vertical positions of a rotor system and a stator system, the displacement amounts of a rotor test surface and a stator test surface in horizontal and vertical directions are obtained. The rotation speed detection device is used for detecting the speed of the rotor. The signals measured by the eddy current displacement sensor and the rotation speed detection device are connected to the data collector and sent to a computer for processing, the real-time operation trajectories of the rotor and the stator are synthesized, thus the fitting is carried out to obtain the rotor-stator rim field of a whole machine, the three-dimensional animation display is carried out, the rubbing risk degree of each test surface is calculated and a rubbing risk section is judged, and the rotor-stator rim of each test surface is outputted. The test method has the advantages of high reliability, an intuitive result and easy observation.

Description

technical field [0001] The invention belongs to the technical field of rotational static clearance of rotating machinery, and in particular relates to a test method of rotational static clearance field of rotating machinery. Background technique [0002] In engineering practice, due to factors such as imbalance and misalignment caused by manufacturing and assembly errors, it often happens that the distribution of the rotational and static clearance between the rotor structure and the stator structure of the engine is not appropriate, resulting in rubbing failures. Rubbing failure is an important reason for the instability of the rotor system. If it is light, it will increase the vibration of the system violently and affect the service life; if it is serious, it will cause permanent bending of the rotor and even cause damage to mechanical equipment. There are many factors affecting the static clearance, mainly including centrifugal force, heat, and vibration. The influence of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/14
CPCG01B7/14
Inventor 陈果屈美娇李成刚李铁宋培培王德友
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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