Closed electro-hydraulic actuator and assembly of closed electro-hydraulic actuator

Abstract

The invention discloses a closed electro-hydraulic actuator. The closed electro-hydraulic actuator comprises an oil tank, an oil servo-motor, a filter mechanism, an energy storage mechanism, a cooler, an oil cylinder casing, a spring mechanism and a motor pump unit, wherein the oil servo-motor comprises an oil cylinder and an integration module. The oil cylinder is installed on the upper side of an oil cylinder top cover and arranged at the center of the inner cavity of the oil cylinder top cover, and the integration module is installed on the lower side of an oil tank top cover and corresponds to the position of the oil cylinder. A cylinder barrel of the oil cylinder is directly connected with the oil tank top cover in a sealed matching mode. The spring mechanism penetrating the inner cavity of the whole oil cylinder casing is installed outside the oil cylinder. One end of the spring mechanism is pressed on the upper side of the oil tank top cover, and the other end of the spring mechanism is connected with a piston rod of the oil cylinder. The extended end of the piston rod of the oil cylinder is connected with a displacement sensor. The closed electro-hydraulic actuator occupies a small area and is small in space size, convenient to install and quick and convenient to use, and mechanical connection in other modes does not exist except the mechanical connection at the valve position of a steam turbine set.

Description

Technical field [0001] The invention relates to the technical field of integration of multiple functional components of a hydraulic servo system of a steam turbine unit, in particular to a closed electro-hydraulic actuator and a combination thereof. Background technique [0002] A set of traditional hydraulic servo system (hereinafter referred to as traditional system), including a hydraulic oil source, 2 to 4 hydraulic actuators (also known as oil motive, sub-regulation valve and main valve), filter device, storage The energy device, regeneration device and temperature control device are connected by pipelines among the components. [0003] Among them, the hydraulic oil source in the hydraulic servo system provides hydraulic power for the hydraulic actuator (hereinafter referred to as the oil motive). The hydraulic power input to the oil motive is converted into the displacement motion output of the piston rod to control the steam valve of the steam turbine unit; the energy storag...

AI Technical Summary

Problems solved by technology

Before it is put into operation, it must go through a complicated and tedious cleaning process, and it can be put into operation only after the hydraulic medium meets the cleanliness standard SAE2 or NAS6.

Therefore, the installation and cleaning cycle of the traditional system is long, the requirements are strict, and the cost is high;

[0013] The pipelines in the steam turbine operating workshop are criss-crossed, the specifications and models of various facilities and equipment are numerous, and the upper, middle and lower layers are stacked in the operating area, and it is difficult to arrange them in an orderly manner. The operating space is narrow, the area and space are scarce, and the equipment difficult to maintain

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