CN111635989A - On-site high-precision heat treatment device for turbine blade - Google Patents
On-site high-precision heat treatment device for turbine blade Download PDFInfo
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- CN111635989A CN111635989A CN202010621598.1A CN202010621598A CN111635989A CN 111635989 A CN111635989 A CN 111635989A CN 202010621598 A CN202010621598 A CN 202010621598A CN 111635989 A CN111635989 A CN 111635989A
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- infrared
- mounting base
- base body
- heat treatment
- heating
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
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- Engineering & Computer Science (AREA)
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a field high-precision heat treatment device for a turbine blade, which comprises an infrared heater shell, an infrared reflecting-mounting base body and an infrared heating pipe, wherein the infrared reflecting-mounting base body is sleeved in the infrared heater shell; wherein, two ends of the infrared reflection-mounting base body are used for protecting the infrared heating pipe through end limiting protection plates; a heating space is formed between the infrared heating pipe and the infrared reflection-mounting base body, a joint mounting hole is formed in the top of the infrared reflection-mounting base body, a cooling pipeline joint is arranged on the top of the infrared reflection-mounting base body, the cooling pipeline joint is communicated with the heating space, a plurality of cooling ports communicated with the heating space are formed in the side wall of the infrared reflection-mounting base body, and a gap communicated with the cooling ports is formed between the outer shell of the infrared heater and the two side faces of the infrared reflection-mounting base body. The invention has the advantages of large heating area, high heating precision, good temperature uniformity, cleanness and no pollution.
Description
Technical Field
The invention belongs to the technical field of heat treatment of turbine blades, and particularly relates to a field high-precision heat treatment device for the turbine blades, which is particularly suitable for the heat treatment process after welding repair of the turbine blades.
Background
The steam turbine is the core power equipment of modern thermal power factory, also applies to metallurgical industry, chemical industry in boats and ships power device equally, mainly drives turbine blade and externally does work through high temperature high pressure steam. As a core power device in the energy field, the output power can reach dozens of to hundreds of megawatts, the average manufacturing cost exceeds one hundred million yuan RMB, and the turbine blade is used as one of the core components of the steam turbine, and the single piece manufacturing cost is high. However, in the service process of the steam turbine, the turbine blades are corroded by high-temperature gas and damaged and destroyed at the ends of the blades, so that the blades need to be repaired and remanufactured after being operated for a period of time (usually half a year to one year), which is an important means for prolonging the service life of the steam turbine and reducing the operation and maintenance cost.
At present, one of the main means for repairing and remanufacturing the blade is to weld the damaged part. After welding, local heat treatment is carried out on the welding part, thermal stress is released and the microstructure is toughened in a mode of annealing the new welding part, the stress mismatching between the new welding part and the original blade part is relieved, and the service life of the blade is prolonged. In order to accelerate the maintenance progress and shorten the maintenance period, the repair and remanufacture of the steam turbine must be carried out on the operation site of the steam turbine, and the blades cannot be disassembled, which puts high requirements on the site heat treatment of the steam turbine blades.
The main means of heat treatment after the repair of the current turbine blade is as follows:
1. heating oxyacetylene or oxypropylene gas. The specific operation process is that workers hold oxyacetylene or oxypropylene gas guns to heat welding parts, and the oxygen acetylene or oxypropylene gas guns have the advantage of high heating speed. However, the gas gun has the defects of small heating area, uneven temperature of a heating part, large temperature error (plus or minus 20 ℃) and the like because the nozzle of the gas gun is small and can only heat the area with the diameter within 30 mm; and because the gas is introduced, the pollution can be caused, the noise is high, and the dependence on the manual experience and the skill level is strong.
2. And heating the resistance tape in a wrapping manner. The method adopts the resistance band to wrap the whole welding area and heats the welding area through the thermal resistance effect, has the advantages of realizing full-field heating on the welding part and having the defects of low heating speed, poor temperature uniformity (plus or minus 20 ℃) and uncontrollable low-temperature section.
In summary, the existing heat treatment means after the repair of the turbine blade has the common defects of low precision, large error, low efficiency and the like. Meanwhile, no high-precision special equipment which can be applied to heat treatment after repairing the turbine blade exists on the world, and in conclusion, the invention provides a set of blade heat treatment equipment after repairing which has the advantages of large heating area, high heating precision and no pollution, and is very necessary.
Disclosure of Invention
The invention aims to provide a field high-precision heat treatment device for a turbine blade, which realizes high-precision full-field heating of a welding part by a quartz lamp infrared radiation technology, wherein the heating range can reach 300mm multiplied by 40mm, and the heating precision can reach 1-2 ℃.
The invention is realized by adopting the following technical scheme:
a field high-precision heat treatment device for a turbine blade comprises an infrared heater shell, an infrared reflecting-mounting base body sleeved in the infrared heater shell, and an infrared heating pipe arranged in the infrared reflecting-mounting base body through an infrared lamp pipe clamp; wherein, two ends of the infrared reflection-mounting base body are used for protecting the infrared heating pipe through end limiting protection plates; a heating space is formed between the infrared heating pipe and the infrared reflection-mounting base body, a joint mounting hole is formed in the top of the infrared reflection-mounting base body, a cooling pipeline joint is arranged on the top of the infrared reflection-mounting base body, the cooling pipeline joint is communicated with the heating space, a plurality of cooling ports communicated with the heating space are formed in the side wall of the infrared reflection-mounting base body, and a gap communicated with the cooling ports is formed between the outer shell of the infrared heater and the two side faces of the infrared reflection-mounting base body.
The invention is further improved in that the cross sections of the infrared heater shell, the infrared reflecting-mounting base body and the infrared heating pipe are all U-shaped.
The invention is further improved in that the radius of the inner arc surface of the end limiting protection plate is smaller than that of the inner arc surface of the infrared heating pipe.
The invention is further improved in that the infrared lamp tube clamp comprises an infrared lamp tube upper clamp and an infrared lamp tube lower clamp.
A further improvement of the invention is that the infrared heater housing is welded to the top of the infrared reflective-mounting base.
The invention is further improved in that a shell mounting gasket is mounted between the infrared heater shell and the two side surfaces of the infrared reflection-mounting base body to form a gap with a preset thickness, cooling gas is introduced through a cooling pipeline joint, and the cooling gas flows out from a cooling port, enters a gap channel between the infrared heater shell and the side surfaces of the infrared reflection-mounting base body and finally flows out from the bottom.
The invention is further improved in that the heating range of the device reaches 300mm multiplied by 40mm, and the heating precision reaches 1-2 ℃.
The invention has at least the following beneficial technical effects:
the invention provides a field high-precision heat treatment device for a turbine blade, which mainly comprises key components such as an infrared heater, a cooling pipeline joint, an end limiting protection plate and the like. The device is designed aiming at the preheating treatment during the circumferential installation of the blades, is a small infrared heater and is convenient to be assembled with the blades for heating. The infrared heaters are fixed in the infrared reflecting-mounting base body through the infrared lamp tube upper clamp and the infrared lamp tube lower clamp, and are used for heating the blades in the heating space. The infrared heater shell is welded with the top of the infrared reflection-installation base body, and a gap with one-degree thickness is formed between the two side faces. And cooling gas is introduced into the gap through the cooling port to cool the two sides, so that the surface of the shell of the infrared heater can reach the required temperature. The end limiting protection plates are arranged on two end faces of the infrared reflection-mounting base body to limit the blades and prevent the blades from impacting the infrared heating pipe.
In conclusion, the invention provides the on-site high-precision heat treatment device for the steam turbine blade, which realizes local high-precision full-field heating of the blade by the quartz lamp infrared radiation technology, and has the advantages of large heating area, high heating precision, good temperature uniformity, cleanness and no pollution compared with the traditional gas heating type heat treatment device and the resistance tape wrapping heating type heat treatment device.
Drawings
FIG. 1 is an assembly view of the structure of the present invention.
Fig. 2 is a structural isometric view of the present invention.
Fig. 3 is a structural front view of the present invention.
Description of reference numerals:
the structure comprises a cooling pipeline joint 1, an infrared heater shell 2, an end limiting protection plate 3, an infrared reflecting-mounting base body 4, an infrared lamp tube upper clamp 5, a shell mounting gasket 6, an infrared lamp tube lower clamp 7, an infrared heating pipe 8, a cooling port 9 and a joint mounting hole 10.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 3, the present invention provides an on-site high precision heat treatment device for turbine blades, which mainly comprises 10 parts: the infrared heating device comprises a cooling pipeline joint 1, an infrared heater shell 2, an end limiting protection plate 3, an infrared reflection-mounting base body 4, an infrared lamp tube upper clamp 5, a shell mounting gasket 6, an infrared lamp tube lower clamp 7, an infrared heating tube 8, a cooling opening 9 and a joint mounting hole 10.
In the device, an infrared heating tube 8 is fixed in an infrared reflection-mounting base 4 by an infrared lamp tube upper clamp 5 and an infrared lamp tube lower clamp 7, forming a heating space. The infrared heater shell 2 is welded with the top of the infrared reflection-mounting base body 4, and the shell mounting gasket 6 is mounted in the middle of two side faces, so that a gap with one-degree thickness is formed. The cooling pipeline joint 1 is arranged on the joint mounting hole 10, cooling gas is introduced, and the cooling gas flows out from the cooling hole 9, enters a gap channel between the infrared heater shell 2 and the side surface of the infrared reflection-mounting base body 4 and finally flows out from the bottom. Thus, the cooling gas is cooled at the two side surfaces, and the surface of the shell 2 of the infrared heater can reach the required temperature. The end limiting protection plates 3 are arranged on two end faces of the infrared reflection-mounting base body 4, the radius of the inner arc surface of each end limiting protection plate is smaller than that of the inner arc of the infrared heating pipe 8, so that the position limitation is carried out on the blades, and meanwhile, the blades can be prevented from impacting the infrared heating pipe 8.
The invention provides an on-site high-precision heat treatment device for a turbine blade, which realizes local high-precision full-field heating of the blade through a quartz lamp infrared radiation technology, has the heating range of 300mm multiplied by 40mm and the heating precision of 1-2 ℃, has the advantages of large heating area, high heating precision, good temperature uniformity and cleanness without pollution compared with the traditional gas heating type heat treatment device and a resistance tape wrapping heating type heat treatment device, and belongs to on-site welding post-treatment equipment in the technical field of turbine blade heat treatment.
Claims (7)
1. A field high-precision heat treatment device for a turbine blade is characterized by comprising an infrared heater shell (2), an infrared reflecting-mounting base body (4) sleeved in the infrared heater shell (2), and an infrared heating pipe (8) mounted in the infrared reflecting-mounting base body (4) through an infrared lamp pipe clamp; wherein the content of the first and second substances,
two ends of the infrared reflection-mounting base body (4) pass through the end limiting protection plate (3) and are used for protecting the infrared heating pipe (8); a heating space is formed between the infrared heating pipe (8) and the infrared reflection-mounting base body (4), a joint mounting hole (10) is formed in the top of the infrared reflection-mounting base body (4), a cooling pipeline joint (1) is arranged on the top of the infrared reflection-mounting base body, the cooling pipeline joint (1) is communicated with the heating space, a plurality of cooling ports (9) communicated with the heating space are formed in the side wall of the infrared reflection-mounting base body (4), and gaps communicated with the cooling ports (9) are formed in the middles of the two side faces of the infrared heater shell (2) and the infrared reflection-mounting base body (4).
2. The on-site high-precision heat treatment device for steam turbine blades according to claim 1, characterized in that the infrared heater casing (2), the infrared reflection-mounting base (4) and the infrared heating pipe (8) are all U-shaped in cross section.
3. The on-site high-precision heat treatment device for the steam turbine blades as claimed in claim 2, wherein the radius of the inner arc surface of the end limiting protection plate (3) is smaller than that of the inner arc surface of the infrared heating pipe (8).
4. The on-site high-precision heat treatment device for the turbine blades according to claim 1, characterized in that the infrared lamp tube clamp comprises an infrared lamp tube upper clamp (5) and an infrared lamp tube lower clamp (7).
5. The on-site high-precision heat treatment device for steam turbine blades according to claim 1, characterized in that the infrared heater case (2) is welded to the top of the infrared reflection-mounting base (4).
6. The on-site high-precision heat treatment device for the steam turbine blade according to claim 1, characterized in that a shell mounting gasket (6) is mounted between the infrared heater shell (2) and the two side surfaces of the infrared reflection-mounting base body (4) to form a gap with a predetermined thickness, cooling gas is introduced through the cooling pipe joint (1), and the cooling gas flows out from the cooling port (9), enters the gap channel between the infrared heater shell (2) and the side surfaces of the infrared reflection-mounting base body (4), and finally flows out from the bottom.
7. The on-site high-precision heat treatment device for the steam turbine blade according to claim 1, wherein the device is heated within a range of 300mm x 40mm with a heating precision of 1-2 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010621598.1A CN111635989A (en) | 2020-07-01 | 2020-07-01 | On-site high-precision heat treatment device for turbine blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010621598.1A CN111635989A (en) | 2020-07-01 | 2020-07-01 | On-site high-precision heat treatment device for turbine blade |
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| Publication Number | Publication Date |
|---|---|
| CN111635989A true CN111635989A (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010621598.1A Pending CN111635989A (en) | 2020-07-01 | 2020-07-01 | On-site high-precision heat treatment device for turbine blade |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113046528A (en) * | 2021-02-03 | 2021-06-29 | 东方电气集团东方汽轮机有限公司 | Blade heat treatment heating device |
-
2020
- 2020-07-01 CN CN202010621598.1A patent/CN111635989A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113046528A (en) * | 2021-02-03 | 2021-06-29 | 东方电气集团东方汽轮机有限公司 | Blade heat treatment heating device |
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