Design for eliminating temperature influence of incubator rotary table pitch shaft system

Abstract

The invention discloses a design for eliminating the temperature influence of an incubator rotary table pitch shaft system. The design comprises a pitch main shaft system, a circular light grid shaftsystem, an elastic shaft, a circular light grid assembly and an incubator. When the temperature of the incubator begins to rise or fall, a U-shaped frame rigidly connected with the incubator is correspondingly deformed due to thermal expansion and cold contraction, so that a left main shaft and a right main shaft are slightly changed in the axial direction, a circular light grid and the left mainshaft are separated by the elastic shaft, so that the axial or radial deformation can be eliminated, and finally, the normal operation of an angle measuring element is ensured.

Description

[0001] 3.1 Technical field [0002] The invention relates to a design for eliminating the temperature influence of a turntable shaft system, in particular to a design for eliminating the temperature influence of a high-precision thermostat turntable pitch shaft system. It can be applied to the testing and development of aerospace, instrumentation and inertial navigation testing equipment. [0003] 3.2 Background technology [0004] In order to meet the requirements of environmental adaptability, many test instruments need to do high and low temperature tests, and the accuracy of each shaft system of the turntable must be consistent with the normal temperature environment. [0005] Shortcomings of existing designs [0006] In general, the materials used for the shaft system of the turntable, the frame and the thermostat will be affected by thermal expansion and contraction, and the thermostat and the frame must be rigidly connected, so the thermal expansion and contraction caus...

AI Technical Summary

Problems solved by technology

[0007] 1. Since the skeleton part of the thermostat is used to rigidly connect with the U-shaped frame to realize pitching and flipping, the strength of the structure must be considered in the manufacture of the skeleton. On this basis, materials with a small thermal expansion coefficient should be used to make the thermostat skeleton. It will increase the cost of incubator production, resulting in an increase in the price of the entire equipment, and the effect of suppressing deformation is not obvious;

[0008] 2. Choose high-precision angle encoders imported from abroad. This encoder allows slight changes in the radial and axial directions of the pitch axis, but the price of this encoder is relatively high, which will also increase the production cost of the turntable equipment.

[0009] At present, the angle measurement accuracy of the pitch shaft system of the thermostat turntable is required to be more than 3 arc seconds. If no measures are taken to directly install the circular light at the end of the shaft system, it will be difficult to meet the technical index requirements; in order to meet the technical index of the pitch shaft system , only imported high-precision angle encoders can be used

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