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

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...

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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

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