Dual-redundancy electro hydraulic servo actuator

An electro-hydraulic servo and actuator technology, applied in mechanical equipment, fluid pressure actuating devices, etc., can solve the problems of high oil temperature rise, large space occupation, and high working system temperature, so as to reduce working temperature and save shafts. To the effect of space, system work safety

Active Publication Date: 2011-10-26
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, this kind of double-rod hydraulic cylinder, because the piston rod protrudes in both directions, takes up a lot of space, especially when the stroke of the hydraulic cylinder is large, this shortcoming is even more serious. This is very undesirable for equipment that requires a small footprint, such as aircraft. In this closed circuit, due to the small amount of hydraulic oil exchange, the temperature of the system will be high for a long time, and the oil The high temperature rise will have an adverse effect on the stable operation of the hydraulic system
[0004] In the hydraulic system, more than 90% of the hydraulic actuators use single-rod differential hydraulic cylinders. Since the flow rates of the two chambers of the single-rod hydraulic cylinders are not equal, it is impossible to use the existing double-outlet hydraulic pumps to directly form a closed type hydraulic cylinder. For the circ

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  • Dual-redundancy electro hydraulic servo actuator

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Embodiment approach 1

[0015] A dual-redundancy electro-hydraulic servo actuator according to the present invention includes a double-rod hydraulic cylinder 1 and its hydraulic control system I, and a single-rod hydraulic cylinder 2 and its hydraulic control system II.

[0016] as attached figure 1 As shown: the double-redundancy electro-hydraulic servo actuator is composed of a double-rod hydraulic cylinder 1 and a single-rod hydraulic cylinder 2 connected in series, and the double-rod hydraulic cylinder 1 and single-rod hydraulic cylinder 2 share the same cylinder 21 , the double-rod hydraulic cylinder 1 and the single-rod hydraulic cylinder 2 share the same piston rod 4, the piston rod 4 protrudes outward from one side of the double-rod hydraulic cylinder 1, and the piston rod 4 can be marked with a mark indicating its extension Output scale, the displacement sensor 3 is arranged in the rodless chamber of the single-rod hydraulic cylinder 2 to detect the displacement of the piston rod 4; the doub...

Embodiment approach 2

[0018] Another hydraulic control system of the double redundant electro-hydraulic servo actuator described in the present invention is as attached figure 2 Shown: Another hydraulic control system Ⅰ of the double-rod hydraulic cylinder 1 figure 2As shown, an open hydraulic control system is adopted, which is composed of an electro-hydraulic servo valve 22, a first two-position four-way electromagnetic reversing valve 11, a third controller 23, and an oil tank 24. The pressure oil and the oil tank 24 are respectively connected to the electro-hydraulic servo valve. 22's Mouth and port connection, electrohydraulic servo valve 22 mouth, The ports are respectively connected with the first two two four way electromagnetic reversing valve 11 mouth, Port connection, the first two two four way solenoid valve 11 mouth, The ports are respectively connected to the two chambers of the double-rod hydraulic cylinder 1, the displacement signal of the double-rod hydraulic cylin...

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Abstract

The invention relates to a dual-redundancy electro hydraulic servo actuator which comprises a double-outlet rod hydraulic cylinder and a single-outlet rod hydraulic cylinder which are connected in series, wherein one end of the double-outlet rod hydraulic cylinder extends outward, and is connected with load; the rodless cavity side of the single-outlet rod hydraulic cylinder is connected with a displacement sensor; and one end of the double-outlet rod hydraulic cylinder and the rodless cavity side of the single-outlet rod hydraulic cylinder are respectively controlled by a hydraulic control system. According to the invention, the double-outlet rod hydraulic cylinder and the single-outlet rod hydraulic cylinder are adopted to form the dual-redundancy electro hydraulic servo actuator, so that the defect of large occupied space for a dual-redundancy electro hydraulic servo actuator which is composed of two double-outlet rod hydraulic cylinders in series is overcome, thus the structure is more compact, because the control on a single-outlet rod return circuit has a cold and hot oil exchange process, the system working temperature is reduced, and the system works more stably.

Description

technical field [0001] The present invention is related to an electro-hydraulic servo actuator, more specifically a double-redundant electro-hydraulic servo actuator including a double-outlet hydraulic cylinder, a single-outlet hydraulic cylinder and a hydraulic control system thereof. technical background [0002] When the hydraulic device is used in some important occasions, the hydraulic device is required to have a certain amount of redundancy, such as the hydraulic actuator used in the main flight surface of the aircraft. When one hydraulic device fails, another hydraulic device can replace it. run to make the plane fly normally. In the existing electro-hydraulic servo circuit device, the double-redundant hydraulic actuator used is a hydraulic actuator composed of two double-rod hydraulic cylinders connected in series. can work simultaneously. The two hydraulic cylinders in the hydraulic actuator are controlled by their own power sources, control elements and control ...

Claims

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Application Information

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IPC IPC(8): F15B15/00F15B1/02
Inventor 权龙王永进熊小晋
Owner TAIYUAN UNIV OF TECH
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