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Steam turbine cylinder block casting pouring system and casting process

A pouring system and steam turbine technology, applied in the direction of manufacturing tools, casting molding equipment, casting molds, etc., can solve the problems of complicated casting operations, difficult to repair castings, and large excavation and repair volume, etc., to improve heat dissipation effect, improve quality, The effect of improving quality

Pending Publication Date: 2021-10-08
杭州新宇机械制造有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In related technologies, the steam turbine cylinder block is often prone to defects such as sand sticking and slag inclusion during casting, resulting in castings, resulting in excessive excavation volume, difficult repair of castings, complicated casting process operation, and poor quality of castings

Method used

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  • Steam turbine cylinder block casting pouring system and casting process
  • Steam turbine cylinder block casting pouring system and casting process
  • Steam turbine cylinder block casting pouring system and casting process

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Embodiment Construction

[0043] The following is attached Figure 1-3 The application is described in further detail.

[0044] It can be understood that, in related technologies, steam turbine cylinder castings are divided into upper half castings and lower half castings, which can be poured by integral casting molding. Using integral casting molding requires the use of ingate gating system, and making two After the sand molding, the box casting operation is carried out, and the cylinder body casting is obtained after the pouring is completed. In the pouring process, since the general pouring temperature is above 1500°C, and the end face of the casting is in a semi-closed state, the thick-walled cavity of the sand mold has been burned by high-temperature molten metal for a long time, and the sand mold has a high heating temperature, which is prone to sticking. Problems such as sand and slag inclusions lead to defects in the inner cavity. At this time, it is necessary to remove the defects from the ou...

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Abstract

The invention relates to the technical field of steam turbine cylinder block casting, and particularly relates to a steam turbine cylinder block casting pouring system and a casting process. The steam turbine cylinder block casting pouring system comprises a pouring gate device arranged in a sand mold, a plurality of slag collecting tables communicating with the pouring gate device and located on a parting surface of the sand mold, a plurality of dead heads fixedly connected with a casting, a plurality of inner chilling blocks connected with the inner side face of the casting, a plurality of outer chilling blocks connected with the outer side face of the casting, a plurality of cooling pipes arranged in the sand mold and a cooling medium generating device communicating with one ends of the cooling pipes; and the pouring gate device, the slag collecting tables, the dead heads, the inner chilling blocks and the outer chilling blocks all communicate with a pouring cavity of the sand mold. The steam turbine cylinder block casting pouring system and the casting process can solve the problem of sand burning in the casting process of the steam turbine cylinder block casting, and operation in the casting process is more convenient.

Description

technical field [0001] The present application relates to the technical field of steam turbine cylinder casting, in particular to a pouring system and casting process for steam turbine cylinder castings. Background technique [0002] At present, the inner and outer cylinders of the steam turbine are the main castings of the steam turbine, which are subjected to the pressure difference between the gas inside and outside the cylinder along the axial direction, the weight of the cylinder itself and the force of the pipeline, as well as the pressure caused by the uneven temperature distribution. thermal stress and deformation. [0003] In related technologies, the steam turbine cylinder block is often prone to defects such as sand sticking and slag inclusion during casting, resulting in castings, resulting in excessive excavation volume, difficult repair of castings, complicated casting process operation, and poor casting quality. [0004] Therefore, there is an urgent need for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/02B22C9/08B22D15/00
CPCB22C9/02B22C9/082B22C9/088B22D15/00
Inventor 王诚
Owner 杭州新宇机械制造有限公司
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