Quickly-propelled low-power and energy-saving hydraulic servo-actuator

A hydraulic servo and energy-saving technology, which is applied in the direction of mechanical equipment, can solve the problems of large throttling and heating, increased operating costs, increased volume and complexity, etc., and achieves fast response, improved reliability and high control precision. Effect

Inactive Publication Date: 2010-08-25
SHANGHAI HUIYI CONTROL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the inherent structural characteristics of the electro-hydraulic servo valve itself, this system has the following disadvantages: 1) The machining accuracy of the electro-hydraulic servo valve is high, and its price is very expensive; 2) Due to the small structure of the electro-hydraulic servo valve and the valve body It is relatively fragile, so it is particularly sensitive to oil pollution, and its valve core is easily worn by impurities in the oil to cause failure, so it must be equipped with a filter system with high filtration accuracy; 3) Since the electro-hydraulic servo valve is sensitive to temperature changes, However, the energy loss of the valve-controlled oil motor electro-hydraulic servo system is very serious, and its throttling heat is relatively large, so it must be equipped with a relatively comp

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  • Quickly-propelled low-power and energy-saving hydraulic servo-actuator

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[0022] The embodiments of the present invention will be further described in detail below in conjunction with the description of the drawings, but this embodiment is not used to limit the present invention. Any similar structure and similar changes that adopt the present invention should be included in the protection scope of the present invention.

[0023] As shown in Figure 1, a fast-propelling low-power energy-saving hydraulic servo actuator provided by an embodiment of the present invention includes an execution circuit and an oil tank N2; the execution circuit includes a servo motor SM1, a bidirectional pump PM1, an oil cylinder CY1, Two lock valves and two supplementary valves; the servo motor SM1 is connected to and controls the operation of the two-way pump PM1; the cylinder CY1 has two working chambers, one of which is a rod chamber and the other is a rodless chamber Cavity; the bidirectional pump PM1 has two oil ports, the first oil port and the second oil port;

[0024] ...

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Abstract

The invention provides a quickly-propelled low-power and energy-saving hydraulic servo-actuator, relates to the technical field of valve control, and aims to solve the technical problem that the prior art cannot simultaneously ensure control accuracy and response speed. The actuator comprises an execution loop, a quick control loop and an oil tank, wherein the execution loop comprises a servo motor, a two-way pump, an oil cylinder, two locking valves and two oil filling valves and is used for carrying out low-speed and accurate control on a turbine valve; and the quick control loop comprises a pilot safety valve, a storage pump motor, a storage pump, an energy storage and a quick closing solenoid valve and is used for controlling quick action of the turbine valve. The actuator has the advantages of high response speed, high control accuracy and low operating cost.

Description

technical field [0001] The invention relates to the technology of valve control, in particular to the technology of a fast-propelled low-power energy-saving hydraulic servo actuator. Background technique [0002] The hydraulic servo actuator (oil motor) is the executive part of the steam turbine regulation and security system, and also the executive part of various industrial control valves. Its main function is to control the piston movement in real time through hydraulic pressure changes, and then control the opening of the (steam turbine) valve . [0003] The traditional steam turbine regulating system adopts the electro-hydraulic servo system of the valve-controlled oil motor. This system (see Figure 2) adopts the electro-hydraulic servo valve Hs supplied with oil from the outside. The oil inlet and oil return port of the electro-hydraulic servo valve Hs are respectively Connect the external oil source, and the two control oil ports are respectively connected to the two...

Claims

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Application Information

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IPC IPC(8): F15B1/02
Inventor 万保中
Owner SHANGHAI HUIYI CONTROL SYST
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