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Electro-hydraulic actuating mechanism capable of being directly driven by hydraulic piston and cooperatively driven by energy accumulator

A technology of hydraulic pistons and accumulators, which is applied in the direction of accumulator devices, engine components, fluid pressure actuators, etc., can solve the problems of poor safety, restrictions on wide application, and difficult maintenance, etc., and achieve simplification of the hydraulic system , easy safety protection, and simple structure

Pending Publication Date: 2020-12-25
XIAN AEROSPACE PROPULSION INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional solution has disadvantages such as high cost, difficult maintenance, etc., and there is no emergency backup power source, and the failure safety is poor, which restricts the wide application of the system

Method used

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  • Electro-hydraulic actuating mechanism capable of being directly driven by hydraulic piston and cooperatively driven by energy accumulator
  • Electro-hydraulic actuating mechanism capable of being directly driven by hydraulic piston and cooperatively driven by energy accumulator

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0020] as attached figure 1 As shown in the figure, an electro-hydraulic actuator cooperating with hydraulic piston direct drive and accumulator drive includes hydraulic piston direct drive device 1, accumulator emergency power module 2, and execution module 3. The driving device 1 is used to control the actuator module 3 to produce switch-type actions. When the emergency working condition causes the hydraulic piston direct drive device 1 to fail to work normally, the emergency power module 2 of the accumulator is activated to control the contraction action of the actuator module 3 .

[0021] The hydraulic piston direct drive device 1 includes a linear motor stator 11, a linear motor mover hydraulic piston composite rod 12, a first hydraulic cylinder 13, a first check valve 14, a second check valve 15 and a spring piston type closed Fuel tank 16. Such as ...

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Abstract

The invention discloses an electro-hydraulic actuating mechanism capable of being directly driven by a hydraulic piston and cooperatively driven by an energy accumulator. The electro-hydraulic actuating mechanism comprises a hydraulic piston direct drive device, an energy accumulator emergency power module and an executing module, wherein the hydraulic piston direct drive device is used for supplying high-pressure oil and low-pressure oil to a hydraulic system, the executing module is used for driving a valve to be opened and closed, and the energy accumulator emergency power module is used for providing enough power to enable the valve to be opened or closed under the condition that the hydraulic piston direct drive device fails due to reasons, so that the fault safety of the equipment system is ensured. According to the electro-hydraulic actuating mechanism, by using the cooperative working mode of a main power source and an auxiliary emergency power source, the fault safety of the system is guaranteed, the actions of sucking oil from a spring piston type closed oil tank and supplying the oil to the system can be completed, and the position information of a piston rod of an executing mechanism can be fed back in real time through a magnetostrictive displacement sensor, and the accurate control over the position of the executing mechanism is achieved.

Description

technical field [0001] This patent belongs to the technical field of electro-hydraulic actuators, and in particular relates to an electro-hydraulic actuator in which a hydraulic piston is directly driven and an accumulator is cooperatively driven. 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 petroleu...

Claims

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Application Information

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IPC IPC(8): F16K31/122F15B1/02
CPCF16K31/122F15B1/022F15B2211/212F15B2211/20515
Inventor 王波杨思坤张书荣沈青井健付强蔡婧刘昶常清张文要张向阳许迎李旭光周宏斌张金波
Owner XIAN AEROSPACE PROPULSION INST
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