A Guide Device Adapting to High-power Electromechanical Actuators

Abstract

The invention discloses a novel guide device adapted to a high-power electro-mechanical actuator, and relates to the field of actuators. The novel guide device comprises a guide rod, a guide block, fillers, a guide groove and a lead screw pair, wherein the guide block is integrally machined and formed with the guide rod, namely an actuating rod, and then the formed guide block is filled with the fillers; the actuating rod is connected with the lead screw pair through a bolt; and then, the guide block with the connected parts is aligned with the guide groove formed in an actuator shell, and gently and slowly put into the guide groove. The novel guide device disclosed by the invention has the advantages that the structure is simple, the number of parts is small, the weight is light, the machining consistency is high, the mechanism machining difficulty is greatly reduced, the machining period is shortened, and the reliability of the whole actuator is improved; the friction coefficient is reduced, the friction between the guide block and the guide groove is greatly reduced, and the temperature rise in the actuator is reduced; and meanwhile, the friction resistance is reduced, and the reliability of the whole electro-mechanical actuator and the dynamic response capability of an electro-mechanical servo are improved.

Description

technical field [0001] The invention relates to the field of actuators, in particular to a new guide device for high-power electromechanical actuators. Background technique [0002] The electromechanical servo system is the executive subsystem of the aerospace vehicle flight control system, and is an important flight executive mechanism of the system with the largest output power except the main engine. In recent years, the electromechanical servo system has developed rapidly and has been verified by many successful cases. In view of the natural superiority of the electromechanical servo system, the development prospect of the electromechanical servo system will be even broader in the future. [0003] The electromechanical actuator is the power output execution system in the electromechanical servo mechanism, which has the characteristics of large load torque and high requirements for dynamic characteristics. Especially in recent years, according to the requirements of the ...

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Problems solved by technology

[0005] The existing guiding mechanism has a cumbersome structure and many parts. Not only is it difficult to process, the production cycle is long, and the assembly is also complicated. Every process will have reliability problems, and it is difficult to ensure accuracy. Therefore, the reliability evaluation of the entire actuator is affected.

In addition, since the original guide mechanism is made of steel and copper, the difference in elastic modulus and stiffness of the materials is relatively large, so the friction coefficient of the kinematic pair is relatively large, which is prone to heat generation, wear debris and other problems. In the case of load operation, the internal temperature of the entire actuator increases, which affects the performance of the electromechanical actuator and reduces the life of the mechanism

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