Direct-drive type disc spring energy storage and return type linear-motion quick shut-off performing mechanism

Abstract

The invention discloses a direct-drive type disc spring energy storage and return type linear-motion quick shut-off performing mechanism. The direct-drive type disc spring energy storage and return type linear-motion quick shut-off performing mechanism comprises a power mechanism, a power switching mechanism, a transmission system and an energy storage and return mechanism, wherein the power mechanism drives the transmission system to realize motion output; the power mechanism comprises an electric drive system and a manual operation system; the power switching mechanism is used for realizingswitching between the electric drive system and the manual operation system; and the energy storage and return mechanism is used for performing shut-on and shut-off on an electric performing mechanismwhile the electric drive system is shut off. An alternating-current servo motor drives a nut to rotate under a shut-on condition, so that a lead screw moves up and down; and under a sudden power-losing condition, the motor and an electromagnetic brake are shut off, the lead screw nut is in a free moving station, a disc spring energy storage mechanism releases elastic potential energy to push thelead screw to move upwards, so that quick shut-off is realized.

Description

technical field [0001] The invention relates to the technical field of electric actuators, in particular to a direct-drive disc spring energy-storage reset type linear stroke fast shut-off actuator. Background technique [0002] With the rapid development of my country's pipeline construction, it is increasingly necessary to realize the localization of key equipment for oil and gas pipelines. Localization of key oil and gas pipeline equipment is not only a national requirement, but also a need for oil and gas transportation companies to reduce construction and operating costs. Its localization is essential for reducing project costs, breaking foreign product monopoly and price barriers, developing our national industry, and promoting oil and gas pipeline equipment. The improvement of the level is of great significance. With the increasing safety requirements in the process of process automation control, especially in petroleum and petrochemical systems, the safety requireme...

AI Technical Summary

Problems solved by technology

However, the traditional electric actuator has the following disadvantages: ① Since the power source comes from the power system, when an accident or other reasons cause a power failure in the power system, the electric actuator cannot move the valve to a safe position, resulting in casualties and property losses; The speed of ordinary AC motors cannot be adjusted, and a reducer is needed to reduce the speed, and the structure is complex; ③There is no handwheel device, and it cannot be switched to manual mode to control the stroke up and down; ④Using nuts as the stroke output end, the processing requirements for nuts are increased

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