Movable blade adjustable axial flow fan hydraulic control actuator

Abstract

The invention relates to a movable blade adjustable axial flow fan hydraulic control actuator. The movable blade adjustable axial flow fan hydraulic control actuator comprises a fan outer shell (1) and a hydraulic oil cylinder (2), and is characterized in that an oil cylinder piston (4) installed in the hydraulic oil cylinder (2) is fixed to an oil cylinder oil distributing shaft (3), a motion feedback rod (9) is arranged in an axial hole of the oil cylinder oil distributing shaft (3), and the other end of the oil cylinder oil distributing shaft (3) is provided with a rotary oil feeder (7); inaddition, an electronic detection device composed of a displacement sensor measuring ruler, a displacement sensor detecting magnetic ring and an electronic warehouse is further adopted, the relativeposition and displacement of the motion feedback rod can be precisely detected, and the electronic detection device sends a signal to control a proportional valve. According to the movable blade adjustable axial flow fan hydraulic control actuator, the structure is reasonable, the reliability of a feedback adjusting mechanism is improved, the response speed is high, meanwhile the oil inlet quantity and the oil outlet quantity of the hydraulic oil cylinder are precisely controlled, closed-loop control and feedback regulation can be achieved, the adjustment precision of axial flow fan blades isfurther improved, and the movable blade adjustable axial flow fan hydraulic control actuator can adapt to working condition requirements of a thermal power plant.

Description

technical field [0001] The invention relates to a hydraulic control execution device, in particular to a hydraulic control actuator of an axial flow fan with adjustable moving blades, belonging to the technical field of hydraulic systems. Background technique [0002] Axial flow fans are widely used in tunnels, coal mines, thermal power plants and other places. The volume and power of axial flow fans are generally relatively large. Under different operating environments and production conditions, the air supply volume and wind pressure are different. Require. This requires the axial flow fan to adjust the air supply volume and wind pressure in real time, and changing the angle of the fan blades is the most simple and effective way to adjust the air supply volume and wind pressure. The existing axial flow fan has a high failure rate under the working conditions of the thermal power plant. More importantly, the hydraulic control actuator of the existing axial flow fan has a c...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the complex structure of the hydraulic control actuator of the existing axial flow fan, the mechanical feedback adjustment mechanism has many parts, the response speed is slow, the adjustment accuracy is low, and the failure rate is high, which cannot be adapted to the work of the thermal power plant. In view of the defects and deficiencies of the situation, we now provide a reasonable structure, the reliability of the feedback adjustment mechanism adopted has been improved, the adjustment accuracy of the blades of the axial flow fan has also been improved, the response speed is fast, the stability is good, and the failure rate is low. A hydraulically controlled actuator for axial flow fans with adjustable blades that can adapt to the working conditions of thermal power plants

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