On-site high-precision heat treatment device for steam turbine blades

A heat treatment device, steam turbine blade technology, applied in heat treatment furnaces, heat treatment equipment, furnaces and other directions, can solve the problems of poor temperature uniformity, low efficiency, low precision, etc., to achieve clean temperature uniformity, no pollution, good temperature uniformity, heating large area effect

Pending Publication Date: 2020-09-08
XI AN JIAOTONG UNIV +1
0 Cites 2 Cited by

AI-Extracted Technical Summary

Problems solved by technology

This method uses a resistance band to wrap the entire welding area and heats it through the thermal resistance effect. The advantage is that the entire welding area can be heated. The disadvantage is that the heating speed is slow, the temperature uniformity is poor (plus or minus 20°C), and the low temperature section cannot control
[0007] In summary, the current methods of heat treatment after steam turbine bl...
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Method used

A kind of on-the-spot high-precision heat treatment device for steam turbine blade provided by the present invention has realized partial high-precision full-field heating to blade by quartz lamp infrared radiation technology, and its heating range can reach 300mm * 40mm, and the heating accuracy can be Up to 1-2 ℃, compared with the traditional gas heating heat treatment device and the resistance band wrapping heating heat treatment device, it has the advantages of large heating area, high heating precision, good temperature uniformity, clean and pollution-free, and belongs to the technical field of steam turbine blade heat treatment Under the spot welding post-processing equipment.
[0027] In this device, the upper fixture 5 of the infrared lamp and the lower fixture 7 of the infrared lamp fix the infrared heating tube 8 in the infrared reflection-installation base 4 to form a heating space. The infrared heater shell 2 is welded to the top of the infra...
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Abstract

The invention discloses an on-site high-precision heat treatment device for steam turbine blades. The device comprises an infrared heater shell, an infrared reflecting-mounting base mounted in the infrared heater shell in a sleeved mode and an infrared heating tube mounted in the infrared reflecting-mounting base through an infrared lamp tube fixture, wherein two ends of the infrared reflecting-mounting base pass through an end limiting protection plate used for protecting the infrared heating tube; a heating space is formed between the infrared heating tube and the infrared reflecting-mounting base, the top of the infrared reflecting-mounting base is provided with a joint mounting hole and a cooling pipeline joint, and the cooling pipeline joint communicates with the heating space; and the side wall of the infrared reflecting-mounting base is provided with a plurality of cooling openings which communicate with the heating space, and gaps which communicate with the cooling openings areformed in middle portions of two side faces of the infrared heater shell and the infrared reflecting-mounting base. The device has the advantages of being large in heating area, high in heating precision, good in temperature uniformity and clean without contamination.

Application Domain

Furnace typesHeat treatment furnaces

Technology Topic

PhysicsInfrared lamp +7

Image

  • On-site high-precision heat treatment device for steam turbine blades
  • On-site high-precision heat treatment device for steam turbine blades
  • On-site high-precision heat treatment device for steam turbine blades

Examples

  • Experimental program(1)

Example Embodiment

[0025] The present invention will be further explained below in conjunction with the drawings.
[0026] Such as Figure 1 to Figure 3 As shown, the present invention provides an on-site high-precision heat treatment device for steam turbine blades, which is mainly composed of 10 parts: cooling pipe joint 1, infrared heater housing 2, end limit protection plate 3, infrared reflection-installation Base 4, infrared tube upper fixture 5, housing mounting gasket 6, infrared tube lower fixture 7, infrared heating tube 8, cooling port 9, and joint mounting hole 10.
[0027] In this device, the upper clamp 5 of the infrared lamp tube and the lower clamp 7 of the infrared lamp tube fix the infrared heating tube 8 in the infrared reflection-mounting base 4 to form a heating space. The infrared heater shell 2 is welded to the top of the infrared reflector-mounting base 4, and the shell mounting gasket 6 is installed in the middle of the two sides, thus forming a gap with a thickness of one degree. The cooling pipe joint 1 is installed on the joint installation hole 10, and the cooling gas is introduced. The cooling gas exits from the cooling port 9, enters the gap channel between the infrared heater housing 2 and the infrared reflector-mounting base 4, and finally exits from the bottom. In this way, the cooling gas is cooled on both sides to ensure that the surface of the infrared heater housing 2 reaches the required temperature. The end limit protection plate 3 is installed on the two end faces of the infrared reflector-installation base 4, and the radius of the inner arc surface is smaller than the inner arc radius of the infrared heating tube 8, so as to limit the position on the blade and prevent the blade from hitting the infrared heating Tube 8.
[0028] The invention provides an on-site high-precision heat treatment device for steam turbine blades, which realizes high-precision and full-field heating of the part of the blade through the quartz lamp infrared radiation technology. The heating range can reach 300mm×40mm, and the heating accuracy can reach 1- 2℃, compared with traditional gas-heated heat treatment device and resistance band-wrapped heat treatment device, it has the advantages of large heating area, high heating accuracy, good temperature uniformity and clean and pollution-free. It belongs to the field of steam turbine blade heat treatment technology. Processing equipment after welding.
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Description & Claims & Application Information

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