Analysis of flow field characteristics of multi-degree-of-freedom motor with air-floatation

Abstract

In order to combine the working performance of the motor and the specific requirements for accuracy, a model combining gas bearing with multi-degree-of-freedom (MDOF) motor is invoked. The bearing structure is optimized in terms of lubrication characteristics, which makes the motor life and deflection accuracy have been significantly improved. This kind of special bearing mainly provides a certain supporting force for the motor. Its stability directly affects the output performance of the motor. It should be ensured that the bearing can be used as a stable supporting structure. This paper mainly analyzes the flow field characteristics of this kind of motor, and discusses the stability of the motor by changing the gas film thickness and the motor rotor speed. Firstly, the structure and basic parameters of the air bearing motor are introduced, and the role of the bearing in the motor is described. Then, the film flow field is analyzed theoretically and simulated by finite element software. Finally, the experimental platform of gas bearing stability is built to verify the rationality of finite element analysis. The results provide references for the application of gas bearings in MDOF motors, and provide a direction for the development of precision in MDOF motors.

Dynamics modeling of a new type of magnetically driven spherical wrist

“…Non-structural environment robots require wrist joints with variable stiffness flexibility performance. In the non-structural environment, typical mechanical wrist joints including gear-driven wrist [1][2], RCC wrist [3], parallel structure wrist [4], etc., all have complex structure, low transmission efficiency, poor dynamic performance and other problems [5], which cannot yet complete complex contact operations through wrist adjustment. It can be seen that the robot wrist can not fully meet the requirements of complex contact operations, and the study of new robot wrist joints is still a current scientific frontier problem.…”

Numerical investigations on the Stirling engine power and the efficiency of Stirling engine generator

“…From the invention to the present, many improvements and developments have been made, and due to its excellent efficiency and its specificity, which are different from other engines, many studies have been conducted in recent years. 2 The FPSE was invented in 1964 by Beale. 3 The FPSE, as an external combustion type power conversion machine, which offers advantages of simple structure, long life without lubrication, and high efficiency.…”

“…From the invention to the present, many improvements and developments have been made, and due to its excellent efficiency and its specificity, which are different from other engines, many studies have been conducted in recent years. 2…”