Magnetic suspended rotor axial displacement radial measurement method

Abstract

The invention discloses a magnetic suspended rotor axial displacement radial measurement method. The method comprises the following steps: a conical measurement block and a plurality of displacement measurement devices are provided; the conical measurement block and the magnetic suspended rotor are arranged coaxially; the at least three displacement measurement devices are arranged on a first mounting line parallel with the axis of the magnetic suspended rotor, and one displacement measurement device is located at the side of the conical measurement block; the rest at least two displacement measurement devices are arranged on a second mounting line parallel with the axis of the magnetic suspended rotor; the first mounting line and the second mounting line are mutually vertical to a plane formed by the axis of the magnetic suspended rotor; the displacement measurement devices at the conical measurement block are divided to components along the axial direction and the radial direction of the magnetic suspended rotor, and in combination of values of other sensors, the axial displacement of the magnetic suspended rotor is decoupled and obtained. The magnetic suspended rotor axial displacement is accurately and reliably measured by the method, the measurement is easy to realize, and the measurement range is large.

Description

technical field [0001] The invention relates to the field of measurement and detection of a magnetic levitation rotor, in particular to a method for measuring the axial displacement and radial direction of a magnetic levitation rotor. Background technique [0002] At present, the axial displacement of most maglev rotors is directly measured by installing sensors in the axial direction. This method of axial displacement measurement is suitable for most occasions, but some specific applications do not have axial space for installing sensors, and radial displacement is required. Measure the axial displacement of the rotor. Regarding the research on the radial measurement of the axial displacement of the maglev, Xiong Jian of Tsinghua University proposed to fix a set of rings outside the rotor. The ring is composed of two materials arranged in sections, and the axial displacement sensor is placed in the radial direction of the rotor, and Aim the sensor at the junction of the tw...

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Problems solved by technology

However, the above two solutions require that the movement of the rotor cannot exceed the range of the sensor coil probe, so the measurement range is limited

And the sensor needs to be installed in an accurate axial position, which brings inconvenience to the installation of the sensor

At the same time, the number of sensors needs to be increased, which increases the cost of the measurement system

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