Indexable motor gap automatic measuring device and measuring method

Abstract

The invention provides an indexable motor gap automatic measuring device and measuring method. The measuring device comprises an axial loading module (1), a radial loading module (3), a measuring tool(4), a radial measuring module (5), an axial measuring module (6), a motor rotating module (9) and an attitude indexing module (7). According to the measuring device and the measuring method, by arranging the attitude indexing module, the attitude of the motor is adjusted in the measuring process, and measurement of the axial clearance and the radial clearance in one-time clamping is achieved; automatic loading of the motor in the axial direction and the radial direction in the measurement process is realized by adopting a miniature cylinder contact type loading mode and through electric pressure regulation and accurate calibration; and finally, by arranging the motor rotating module, repeated measurement of different angle positions in the circumferential direction of the motor is realized, the measurement time of a single motor gap is greatly shortened, and the production efficiency is improved.

Description

technical field [0001] The invention relates to an automatic gap measurement device and a measurement method for an indexable motor, and belongs to the technical field of precise detection of aerospace inertial devices. Background technique [0002] The hemispherical dynamic pressure gas bearing gyro motor is the heart of the high-precision and long-life gyro instrument. There is a gap between the stator assembly and the rotor body and there are grooves on the surface. When the rotor body rotates, the external air will be sucked into the gap to form a dynamic pressure. , so that the surface of the rotor body is out of contact with the surface of the stator assembly. The bearing capacity of the bearing mainly depends on the working clearance of the bearing. Generally, the axial clearance and radial clearance require 2 to 4 μm. Such as figure 1 Schematic diagram showing the axial clearance of the hemispherical motor. [0003] At present, in the motor production process, the...

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Problems solved by technology

One method is to rely on a high-precision three-coordinate tester to test the hemisphere and the ball bowl of the bearing pair, but there are disadvantages such as large measurement errors, long measurement cycles, and the need for professional testing personnel to operate.

Another method is to use a manual method to hook weights for the axial clearance and radial clearance respectively, and use a capacitive sensor for measurement. For details, see the Chinese invention patent "A Device and Method for Measuring the Bearing Clearance of a Hemispherical Dynamic Pressure Motor", Publication number: CN105203018A, public date: December 30, 2015, but the device and method have problems such as repeated clamping, cumbersome measurement steps, and long manual operation measurement cycle

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