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Valve housing used for opening square hole on electro-hydraulic servo valve in steam turbine power generation and processing method thereof

An electro-hydraulic servo valve, steam turbine technology, applied in valve operation/release device, valve detail, multi-port valve, etc., can solve the problem of wasting a lot of man-hours, save man-hours, improve work efficiency, and simplify processing.

Inactive Publication Date: 2009-06-03
SHANGHAI NUOMA HYDRAULIC SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The valve sleeve and the processing method of the square hole of the electro-hydraulic servo valve used for steam turbine power generation of the present invention adopt two pairs of planes of appropriate size to be milled out in advance above the working edge of the valve sleeve to be processed, and then Two square holes are cut out by wire cutting, and the intersecting sides of the two square holes are intersected outside the mating surface of the valve core, so as to ensure full opening. This method solves the problem of the traditional round hole plus inner ring groove. The problem of wasting a lot of man-hours in the processing of ring grooves

Method used

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  • Valve housing used for opening square hole on electro-hydraulic servo valve in steam turbine power generation and processing method thereof
  • Valve housing used for opening square hole on electro-hydraulic servo valve in steam turbine power generation and processing method thereof

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Embodiment Construction

[0014] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0015] As shown in Figures 1 and 2, the parts marked 1, 2, 3 and 4 on the front view are the parts that have been pre-milled and square holes.

[0016] The implementation of the key parts of the valve sleeve of the electro-hydraulic servo valve used for steam turbine power generation of the present invention is to first locate the positions at 1, 2, 3, and 4 according to the design requirements and mill out four (two pairs) in ...

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Abstract

The invention relates to a valve housing used for opening square holes on an electro-hydraulic servo valve in steam turbine power generation and a processing method thereof. The method is characterized by comprising the steps as follows: (1) two pairs of planes in proper size are milled in advance above a working edge of a processed valve housing, the size of the milled planes is slightly larger than the size of the square holes to be opened; (2) two pairs of square holes including a hole (1), a hole (2), a hole (3) and a hole (4) are cut out on the planes by linear cutting; and the intersection edges of the two pairs of square holes are crossed outside a valve core matching surface, so as to ensure complete opening. The valve housing of the electro-hydraulic servo valve used in the steam turbine power generation is processed by the method that a plane is milled on blank material in advance, and then the square holes are processed by the processing method of linear cutting. The plane which is milled in advance can reduce the cutting quantity and the abrasive magnitude of the linear cutting. The valve housing is simple for processing, saves a lot of time and improves the work efficiency.

Description

technical field [0001] The invention is used for the valve sleeve of the electro-hydraulic servo valve on steam turbine power generation. Background technique [0002] The development of electro-hydraulic servo valves in the international professional field has gone through more than 50 years, and the application occasions are becoming more and more extensive. However, the research and manufacture of domestic servo valves are still in a relatively backward state, and the technical level of parts processing is also far behind that of foreign countries. As a core component of the electro-hydraulic servo valve - the valve sleeve, its design and processing technology determine the overall performance of a product. Whether it can solve the processing technology of the valve sleeve, improve the performance stability of the product and the production efficiency is the key to this The core problem of design and production of electro-hydraulic servo valve. [0003] For the large-fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K27/00F16K11/02F16K31/42B23P15/00
Inventor 吴越黄碧峰
Owner SHANGHAI NUOMA HYDRAULIC SYST
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