Method for designing sliding bearing of supergravity centrifugal machine based on vibration control

Abstract

The invention discloses a method for designing a sliding bearing of a supergravity centrifugal machine based on vibration control. The rigidity and damping characteristics of the bearing are obtained through structural design parameters of a guide bearing of the supergravity centrifugal machine and dynamic characteristic coefficients of the bearing under a certain installation gap, the vibration characteristics in a hanging basket of the supergravity centrifugal machine are obtained through rotor dynamics simulation calculation, the vibration characteristics are compared with vibration requirements of an airborne device and further optimized, finally, structural parameters are kept unchanged in the using process of the sliding bearing, and the centrifugal simulation test of an onboard device is safe and effective by adjusting the installation gap. The problem that vibration control is passive when an existing supergravity centrifugal machine adopts a rolling bearing is solved, a thought is provided for design and use of the sliding bearing for the supergravity centrifugal machine or similar machinery, and certain guiding significance and practical value are achieved for improving the vibration level of a rotating shaft system.

Description

technical field [0001] The invention belongs to a design method of a sliding bearing in the technical field of design and operation of a supergravity centrifuge, and relates to a method for controlling and optimizing the operation quality of a supergravity centrifuge based on the design and use of the sliding bearing, so as to effectively control the vibration control of the supergravity centrifuge. Background technique [0002] The supergravity centrifuge has been widely used in scientific research because of its effects of time reduction, scale reduction and time reduction. Many far-reaching scientific breakthroughs and significant economic design benefits have been achieved in the fields of deep and deep sea resource development, underground space utilization, new material development, geological process research, aerospace and other fields. The development trend of ultra-gravity centrifuges at home and abroad is: large capacity, high centrifugal acceleration, many types ...

AI Technical Summary

Problems solved by technology

[0014] (1) Existing safety assessments or tests on supergravity centrifuges are based on the rolling bearing support structure, without considering the impact of bearing support stiffness on the dynamic response of the rotor system, and there is no such thing as a sliding bearing support supergravity centrifuge safety assessment plan;

[0015] (2) The design and application of sliding bearings is mainly based on the mature experience of water turbines, but the load conditions of ultra-gravity centrifuges are more complicated, and the vibration quality of the rotor is higher, so the design and use of sliding bearings for ultra-gravity centrifuges The method is immature, and there is currently no application of sliding bearings on ultra-gravity centrifuges and the corresponding design and use methods

[0016] To sum up, the existing technology lacks the design and use method for the sliding bearing under the complex working conditions of the supergravity centrifuge

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