Novel hydraulic servo-motor system and adopted control method

A control method and technology of oil motor, applied in the direction of engine components, machines/engines, mechanical equipment, etc., to achieve the effect of strong versatility and low cost

Pending Publication Date: 2018-04-20
成都新华控制工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When used on a large steam turbine, each steam inlet valve needs to be controlled separately. There are many oil motors in one unit. The oil motor itself is simple in structure and small in size, which i

Method used

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  • Novel hydraulic servo-motor system and adopted control method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1As shown, this embodiment provides a specific implementation of a novel oil motor system, which includes a hydraulic control valve 1 and an oil motor 2;

[0038] The oil motor 2 is only composed of a cylinder 3, a piston 4 and a piston rod 6, the piston 4 is arranged in the cylinder 3, and the piston 4 divides the inner space of the cylinder 3 into two cavities 5, the The piston rod 6 is fixed on the piston 4;

[0039] It also includes two oil holes arranged on the cylinder body 3, and one of the oil holes communicates with one of the cavities 5, and the other oil hole communicates with the other cavity 5;

[0040] The hydraulic control valve 1 has at least two control oil ports, and the two oil holes are respectively connected to different control oil ports of the hydraulic control valve 1 through separate oil pipes 7, and the hydraulic oil flow direction of the two control oil ports can be switched .

[0041] Although the two oil motors 2 in the pri...

Embodiment 2

[0051] The present embodiment is further limited on the basis of embodiment 1, as figure 1 As shown, as a specific implementation of the hydraulic control valve 1, the hydraulic control valve 1 is an electro-hydraulic servo valve. Since the current steam turbine control system generally adopts the digital electro-hydraulic control system (DEH), the opening of the oil motor 2 is controlled through the electro-hydraulic servo valve. The direct oil return has been canceled, from the original control of only one oil circuit pressure to the simultaneous control of two oil circuit pressures, it seems that an additional oil circuit needs to be controlled, but in fact, the increase in control equipment and the increase in control difficulty , the existing steam turbine control system can be directly used, and the adoption of this scheme on the existing steam turbine will not involve the increase of control equipment.

[0052] As a specific implementation solution of the hydraulic con...

Embodiment 3

[0057] This embodiment makes further limitations on the technical solution provided in embodiment 1: as a further technical solution of the control method adopted by the above-mentioned new oil motor 2 system, the hydraulic control valve 1 adopts an electro-hydraulic servo valve .

[0058] The electro-hydraulic servo valve includes a four-way reversing valve.

[0059] At least one of the oil pipes 7 is provided with a pressure relief port to unload the pressure in the corresponding area through the corresponding pressure relief port in the event of oil or power failure.

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Abstract

The invention discloses a novel oil motor system and the adopted control method. The system includes a hydraulic control valve and an oil motor; the oil motor is only composed of a cylinder body, a piston and a piston rod, and the piston is arranged in the cylinder body , and the piston divides the inner space of the cylinder into two cavities, the piston rod is fixed on the piston; it also includes two oil holes arranged on the cylinder, and one of the oil holes communicates with one of the cavities, The other oil hole communicates with the other cavity; the hydraulic control valve has at least two control oil ports, and the two oil holes are respectively connected to different control oil ports of the hydraulic control valve through separate oil pipes, and the two control oil ports The flow direction of the hydraulic oil at the port can be switched. The method is the control method of the above structure, and this scheme provides a high-quality, low-cost, and highly versatile oil-motor system involvement and control scheme.

Description

technical field [0001] The invention relates to the technical field of steam turbine intake control technology, in particular to a novel oil motor system and the adopted control method. Background technique [0002] The steam intake of steam turbines in large-scale thermal power plants is adjusted through valves with adjustable openings. This adjustment uses oil motors to drive the valves to open or close. Currently, the following two types of oil motors are mainly used. [0003] One of them is a low-pressure turbine oil motor. Its structure and working principle are: the main body of the oil motor has two parts connected together, the oil motor and the misoil valve, and the oil pressure can be adjusted and controlled by a synchronizer or an electro-hydraulic servo valve , to control the movement of the wrong oil valve slide valve, thereby driving the oil motor to move up and down. The characteristic of this kind of oil motor system is that it uses the lubricating oil of th...

Claims

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Application Information

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IPC IPC(8): F01D17/10F15B15/14F15B15/20
CPCF01D17/10F15B15/1423F15B15/20
Inventor 何仕兴
Owner 成都新华控制工程有限公司
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