A Ferrofluid Sealed Shaft for Accurate Angle Measurement in Thermal Vacuum Environments
A magnetic fluid sealing and thermal vacuum technology, which is applied in the direction of engine sealing, bearing components, shafts and bearings, to improve test accuracy and prevent bending
Inactive Publication Date: 2015-10-28
ZHEJIANG GONGSHANG UNIVERSITY
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Problems solved by technology
[0006] Aiming at problems such as the deformation of the measured piece and the frictional influence of the magnetic fluid seal transmission device in the thermal vacuum torsion experiment, the present invention provides a magnetic fluid seal in a thermal vacuum environment that eliminates friction and is not affected by the deformation of the measured piece. High-precision friction-free angle measuring shaft
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Embodiment Construction
[0014] The present invention is further described now in conjunction with accompanying drawing.
[0015] combined with figure 1 , a magnetic fluid sealed shaft capable of accurately measuring angles in a thermal vacuum environment, including a transmission shaft 1, an air bearing sleeve, a non-magnetic seat 2 and a magnetic core assembly, the air bearing sleeve includes a first air bearing sleeve 3 and a second air bearing sleeve The sleeve 4, the magnetic core assembly, the first air bearing sleeve 3, and the second air bearing sleeve 4 are set on the transmission shaft 1 in sequence from left to right, the magnetic core assembly and the first air bearing sleeve 3, the first air bearing sleeve 3 and There is a certain distance between the second air bearing sleeves 4, and the non-magnetic base 2 is set on the first air bearing sleeve 3, the second air bearing sleeve 4, and the magnetic core assembly, and the non-magnetic base 2 and the first air bearing sleeve 3, There is no...
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The invention discloses a magnetic fluid sealing shaft capable of accurately measuring angles under hot vacuum condition, and relates to shaft angle test devices under hot vacuum condition. The sealing shaft comprises a transmission shaft, two floating bushes, a non-magnetic base and a plurality of magnetic core components, wherein the magnetic core components, the first floating bush and the second floating bush are sleeved on the transmission shaft from left to right in sequence; an annular projection is formed in the transmission shaft at the clearance part between the first floating bush and the second floating bush, and an annular coding plate is sleeved on the excircle of the annual projection. Two floating bushes are sleeved on the transmission shaft and form floating support for the transmission shaft; the impact on torque measurement caused by frictions of ordinary bearings is avoid and the test precision is improved by utilizing the advantage that floating devices are friction-free; a plurality of gas vents are formed axially in uniform distribution in two annular end faces of the first floating bush and the second bush near the annular projection, stable gas films are formed between the floating bushes and the annular projection, and the impact on measurement precision caused by relative friction due to the direct contact between a flange plate and the floating bushes is prevented.
Description
technical field [0001] The invention relates to a device for measuring the angle of a shaft in a thermal vacuum experiment, in particular to a magnetic fluid sealed shaft capable of accurately measuring the angle in a thermal vacuum environment. Background technique [0002] Thermal vacuum test refers to the test to test the performance and function of the tested part under the specified vacuum and thermal cycle conditions. The thermal vacuum test not only requires a vacuum simulation system capable of simulating the vacuum environment of outer space, but also requires a device that can drive or load the equipment to simulate the drive and load of the mechanism, as well as real-time high-precision measurement of the torque, Capability of information such as rotation angle and rotational speed. [0003] In the thermal vacuum test of torsional loading on the tested part, due to the thermal vacuum environment, the reliability of sensors and power equipment is reduced, the serv...
Claims
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IPC IPC(8): F16C35/08F16J15/54F16J15/43
Inventor 谢毅
Owner ZHEJIANG GONGSHANG UNIVERSITY