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Relaxation method straight shaft water cooling type heating device

A heating device, water-cooled technology, applied in metal processing equipment, forming tools, manufacturing tools, etc., can solve the problems of high heating temperature, difficult operation, complex process and so on

Pending Publication Date: 2019-06-21
HUADIAN ELECTRIC POWER SCI INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to shorten the repair period, the power plant generally adopts the relaxation method to straight-axis the rotor on site, but the heating temperature of this process is relatively high (30°C-50°C lower than the tempering temperature of the rotor), and multiple thick wires (aluminum or Copper) is wound into a heating coil on the rotor for heating, the process is more complicated and the operation is difficult
[0004] In addition, the heating coil is easy to overheat, and a short circuit will occur between the coils, which will cause damage to the insulation layer and easily burn the rotor

Method used

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  • Relaxation method straight shaft water cooling type heating device
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  • Relaxation method straight shaft water cooling type heating device

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Embodiment Construction

[0034] The embodiment of the invention discloses a relaxation method direct-axis water-cooled heating device, which uses a hollow copper tube to prepare a heating coil, which is easy to bend and wind after on-site annealing, and at the same time, cooling water is passed through the copper tube to avoid heating coils. There is a problem of overheating and melting.

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] see Figure 1-Figure 4 , The embodiment of the present invention provides a relaxation m...

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Abstract

The invention discloses a relaxation method straight shaft water cooling type heating device. The relaxation method straight shaft water cooling type heating device comprises copper pipes (102). The copper pipes (102) are wound on rotors so that heating coils are formed. The copper pipes (102) are hollow pipes and supplied with cooling water inside. According to the relaxation method straight shaft water cooling type heating device, the hollow copper pipes (102) are adopted to prepare the heating coils; compared with relatively thick solid wire adopted in the prior art, the hollow copper wires(102) are easy to bend after annealing and convenient to wind; and meanwhile, the copper pipes (102) are supplied with cooling water inside, and the problem of overheating melting with the heating coils is prevented from occurring.

Description

technical field [0001] The invention relates to the technical field of steam turbine rotor direct shaft, and more specifically relates to a relaxation method direct shaft water-cooled heating device. Background technique [0002] Steam turbine is one of the three main engines in thermal power plants, and its operation safety is very important to power plants. Due to improper operation of steam turbines or congenital defects of materials, sometimes the large shaft will be permanently bent, which will bring great losses to the power plant. Therefore, before the turbine can be restarted, its rotor usually needs to be straightened. [0003] In order to shorten the emergency repair period, the power plant generally adopts the relaxation method to straight-axis the rotor on site, but the heating temperature of this process is relatively high (30°C-50°C lower than the tempering temperature of the rotor), and multi-strand thick wires (aluminum or Copper) is wound into a heating co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D37/16
Inventor 黄海舟王小龙张才稳张大国卢杰
Owner HUADIAN ELECTRIC POWER SCI INST CO LTD
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