Device for preventing gland housing in feed pump steam turbine balancing piston from deformation

Abstract

The invention relates to a device for preventing a gland housing in a feed pump steam turbine balancing piston from deformation. The outside of the bracket is provided with a rectangular structure, the inside of the bracket is provided with an arc structure, the middle of the upper part of the bracket is provided with a threaded hole, a hanging ring is screwed with a threaded hole on the bracket, the lower part of the left side of the bracket is provided with a first through hole, the lower part of the right side of the bracket is provided with a second through hole, the first through hole and the second through hole are arranged on the same axial line, a first bolt penetrates through the first through hole, the outer end of the first bolt is screwed with a first nut, the inner end of the first bolt and a hook are connected to form an integral body, a second bolt penetrates through the second through hole, the outer end of the second bolt is screwed with a second nut, and the inner end of the second bolt and a hook are connected to form an integral body. The device saves the overhaul cost, shortens the construction period, can ensure the clearance of the throughflow part to be normal, achieves the original technological requirements of equipment, avoids equipment replacement due to the influence on the technological requirements of the equipment after deformation, and can ensure the requirements for the equipment overhaul cost and construction period.

Description

technical field [0001] The invention relates to a device for preventing deformation of a steam seal body in a balance piston of a feedwater pump steam turbine, and belongs to the technical field of devices for preventing deformation of a steam turbine seal body. Background technique [0002] The wall thickness of the steam seal in the balance piston of the feed water pump steam turbine is relatively thin. Due to the change of operating conditions and temperature difference, there will be a problem that it will be deformed and cannot be reassembled after each overhaul and disassembly. The existing solution is to replace the new steam seal body. Or carry out heat treatment on the removed steam seal body. If the stress relief of the newly replaced steam seal body is not good, it will cause deformation of the steam seal body for next maintenance, and will also incur a certain cost. Using heat treatment will cause the flow part of the steam seal body to be damaged. The gap is une...

AI Technical Summary

Problems solved by technology

[0002] The wall thickness of the steam seal in the balance piston of the feed water pump steam turbine is relatively thin. Due to the change of operating conditions and temperature difference, there will be a problem that it will be deformed and cannot be reassembled after each overhaul and disassembly. The existing solution is to replace the new steam seal body. Or carry out heat treatment on the removed steam seal body. If the stress relief of the newly replaced steam seal body is not good, it will cause deformation of the steam seal body for next maintenance, and will also incur a certain cost. Using heat treatment will cause the flow part of the steam seal body to be damaged. The gap is uneven, and the heat treatment process is also very complicated

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