Turbine rotating baffles with mid-extraction and full-circle inlet steam

Abstract

The invention discloses a rotating baffle for a steam turbine with intermediate extraction and full-circle steam intake, comprising a baffle body, one side of the baffle body is provided with a rotating ring, and one side of the baffle body is provided with 80 steam passages, 80 The steam passages are divided into 4 groups, each group has 20 steam passages, and every two steam passages form a small unit. There are two rows of 40 windows in total on the other side of the partition body. There are also two rows of 40 windows. The fan angle of the windows gradually decreases from the first group to the last group, reducing the use of steel by about 30,000 tons and reducing the difficulty of making the front cylinder material; the surface of the front cylinder can be designed to be conical. It is easy to design with building blocks, and the thermal efficiency is increased by 3~5%, which can increase the output of the steam turbine and generate more power.

Description

technical field [0001] The invention relates to a rotating diaphragm of a steam turbine with intermediate extraction, in particular to a rotating diaphragm of a steam turbine with full-circumferential steam intake. Specifically, the utility model relates to a steam turbine rotating baffle plate suitable for full-circle steam intake of high-pressure intermediate extraction steam, and belongs to the technical field of steam turbines. Background technique [0002] At present, domestically and abroad, the adjustable steam extraction structure with intermediate extraction pressure of 3.7~4.1MPa is generally used to control the inlet steam pressure and flow instead of full-circle steam inlet. The lifting plate valve disc is relatively large in volume, uses a lot of materials, the control process is complicated, the processing is difficult, and it is not conducive to the design of the steam turbine building block series, and the thermal efficiency generated is also low. [0003] R...

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Problems solved by technology

[0004] The problem to be solved by the present invention is to overcome the disadvantages of large volume, low efficiency and partial steam intake degree of the non-national steam intake rotating baffle plate with uneven force and large thrust of the existing lift plate valve disc control intermediate extraction technology, It provides a whole steel body with evenly arranged windows and static plate structure around the whole circumference, so that the 3.7~4.1MPa intermediate adjustment steam extraction mechanism can enter the steam in the suction part of the rotating baffle on the basis of the advantages, compared with the lifting plate valve disc control intermediate Steam extraction, which is convenient for building block design, reduces manufacturing costs and improves thermal efficiency. Steam turbine rotating baffles for steam extraction in the middle and full-circle intake steam

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