CN110951954A - Surface shot blasting strengthening process method for guide vane blade of main pump of nuclear power station - Google Patents
Surface shot blasting strengthening process method for guide vane blade of main pump of nuclear power station Download PDFInfo
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- CN110951954A CN110951954A CN201911353201.9A CN201911353201A CN110951954A CN 110951954 A CN110951954 A CN 110951954A CN 201911353201 A CN201911353201 A CN 201911353201A CN 110951954 A CN110951954 A CN 110951954A
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- China
- Prior art keywords
- guide vane
- main pump
- power station
- shot blasting
- nuclear power
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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
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a surface shot peening strengthening process method for vanes of a main pump of a nuclear power station, in particular to a surface shot peening strengthening process method for vanes of 4 of the main pump of the nuclear power station, wherein fourteen vanes are uniformly distributed between a hub and an outer ring, and as the vanes 4 are processed by an integral solid forging 1, the surface shot peening strengthening treatment is required to be carried out on the surfaces of inner cavities formed between two adjacent vanes and the vanes in order to enhance the impact resistance and the fatigue resistance of the vanes 4. The distance between the nozzle and the blade is less than 30mm, so that the surface roughness Rz of the stainless steel shot after shot blasting treatment can be reduced by less than 20. The IRB4600 type six-axis industrial robot produced by ABB company can improve the operation stability and uniformity, solve the problem of shortening the processing period, and greatly promote the domestic manufacturing process of the nuclear main pump.
Description
The technical field is as follows:
the invention relates to a surface shot blasting strengthening process method for a guide vane blade of a main pump of a nuclear power station.
Background art:
the guide vane in the shaft-sealed nuclear main pump is one of the most critical components in the main pump, and is an important hydraulic component directly influencing the pump head and flow. At present, the shaft seal type nuclear main pump guide vane component is the only equipment which is not realized in the nuclear island of the nuclear power station in China and is purchased abroad before.
At present, China has no manufacturer for strengthening the surface of the guide vane of the nuclear main pump, and the shot blasting method adopted by the same overseas company is that workers hold a spray gun to carry out shot blasting strengthening, so that the defects of long processing period, 7-10 days of shot blasting strengthening processing period of the guide vane of the overseas company, poor stability and uniformity, low processing speed, overspray phenomenon in local areas and the like exist.
The invention content is as follows:
the invention aims to provide a surface shot peening strengthening process method for a guide vane blade of a main pump of a nuclear power station, which ensures the stability and uniformity of shot peening of the guide vane and shortens the processing period to 3-4 days. The technical scheme of the invention is as follows: nuclear main pump stator (4) is by fourteen blades, evenly distributed between wheel hub and outer loop, because stator (4) are processed for whole solid forging (1) and form, for the impact resistance and the fatigue resistance of reinforcing stator (4) blade, the inner chamber surface that forms between two adjacent blades and the blade needs to carry out surface peening strengthening treatment, and the process steps of concrete implementation are:
1) placing a guide vane (4) product on a mould (3) of a workbench, and determining a zero point of a guide vane (4) component of a main pump of a nuclear power station, wherein the zero point is a coincident point of a central line of the guide vane (4) component and a central line of the mould;
2) dividing a shot blasting area of the guide vane (4), wherein a tool or an adhesive tape is needed to be used for protecting a non-shot blasting area, so that the surface of the non-shot blasting area is prevented from being damaged;
3) test piece for shot blasting strength by special test: carrying out strength test on an Almen A-type test piece, wherein the strength range needs to be ensured to be 0.4-0.45 mm;
4) shot blasting strengthening treatment is carried out on the surface of the main pump guide vane (4) of the nuclear power station by using a stainless steel shot material which is made of the same material as the guide vane (4) and has the diameter of 1mm, and through the jet pressure of 0.48-0.51MPa, the shot flow per minute of 9.8-10.2 kg and the nozzle moving speed of 150mm per minute, the distance between the nozzle (2) and the vane is 30 mm;
5) the method comprises the steps of cleaning the surfaces of the blades of the guide vanes (4) of the nuclear main pump by using zirconia ceramic pellets with the diameter of 125 mu m and through the spraying pressure of 0.35-0.4MPa, the pellet flow rate per minute of 3.5-4.0kg and the moving speed of a nozzle (2) with the diameter of 200mm per minute, wherein the distance between the nozzle and the blades is 30mm, so that the requirement that the final surface roughness Rz is less than 20 is met.
Technical effects of the invention
The invention is based on the surface shot peening strengthening process method of the guide vane blade of the main pump of the nuclear power station, and is obtained through hundreds of tests: shot blasting strengthening treatment is carried out on the surface of a guide vane of a main pump of a nuclear power station by using a stainless steel shot with the diameter of 1mm and by using the jet pressure of 0.48-0.51MPa, the shot flow per minute of 9.8-10.2 kg and the nozzle moving speed of 150mm per minute, and the intensity of an Almen A-type test piece is 0.4-0.45mm under the condition that the distance between the nozzle and the vane is 30 mm; the surface roughness Rz after the stainless steel shot blasting treatment can be reduced to less than 20 by using zirconia ceramic shots with the diameter of 125 μm, cleaning the surface by a spraying pressure of 0.35-0.4MPa, a shot flow rate of 3.5-4.0kg per minute and a nozzle moving speed of 200mm per minute, and the distance between the nozzle and the blade is 30 mm. The IRB4600 type six-axis industrial robot produced by ABB company can improve the operation stability and uniformity and solve the problem of shortening the processing period. This will greatly advance the process of manufacturing the nuclear main pump in a domestic manner.
Drawings
FIG. 1 guide vane forging drawing
FIG. 2 guide vane shot peening drawing
The specific implementation mode is as follows:
as shown in fig. 2, the surface shot peening strengthening process method for the guide vane 4 blade of the nuclear power station main pump, wherein the guide vane 4 of the nuclear power station main pump is formed by fourteen blades which are uniformly distributed between a hub and an outer ring, as shown in fig. 1, because the guide vane 4 is processed by an integral solid forging 1, in order to enhance the impact resistance and the fatigue resistance of the guide vane 4 blade, the surface shot peening strengthening treatment needs to be carried out on the surfaces of inner cavities formed between two adjacent blades and the blade, and the specific implementation process steps are as follows:
1) placing a guide vane 4 product on a mould 3 of a workbench, and determining a zero point of a guide vane 4 component of a main pump of a nuclear power station, wherein the zero point is the superposition of the central line of the guide vane 4 component of the main pump of the nuclear power station and the central line of the mould;
2) dividing a shot blasting area of the guide vane 4, wherein a tool or an adhesive tape is needed to be used for protecting a non-shot blasting area, so that the surface of the non-shot blasting area is prevented from being damaged;
3) test piece for shot blasting strength by special test: carrying out strength test on an Almen A-type test piece, wherein the strength range needs to be ensured to be 0.4-0.45 mm;
4) shot blasting strengthening treatment is carried out on the surface of a guide vane 4 of a main pump of a nuclear power station by using a stainless steel shot material which is made of the same material as the guide vane 4 and has the diameter of 1mm, through a nozzle moving speed of 0.48-0.51MPa of jet pressure, 9.8-10.2 kg of shot flow per minute and 150mm per minute, and the distance between a nozzle 2 and the vane is 30 mm;
5) the method comprises the steps of cleaning the surfaces of vanes of a guide vane 4 of a nuclear main pump by using zirconia ceramic pellets with the diameter of 125 mu m through the spraying pressure of 0.35-0.4MPa, the pellet flow rate of 3.5-4.0kg per minute and the moving speed of a nozzle 2 with the diameter of 200mm per minute, wherein the distance between the nozzle and the vanes is 30mm, so as to meet the requirement that the final surface roughness Rz is less than 20. A six-axis industrial robot model IRB4600, manufactured by ABB corporation, may be used to ensure the processing stability of the three parameters described above.
Claims (2)
1. A surface shot blasting strengthening process method for a guide vane blade of a main pump of a nuclear power station is characterized by comprising the following steps: nuclear main pump stator (4) is by fourteen blades, evenly distributed between wheel hub and outer loop, because stator (4) are processed for whole solid forging (1) and form, for the impact resistance and the fatigue resistance of reinforcing stator (4) blade, the inner chamber surface that forms between two adjacent blades and the blade needs to carry out surface peening strengthening treatment, and the process steps of concrete implementation are:
1) placing a guide vane (4) product on a mould (3) of a workbench, and determining a zero point of a guide vane (4) component of a main pump of a nuclear power station, wherein the zero point is a coincident point of a central line of the guide vane (4) component and a central line of the mould;
2) dividing a shot blasting area of the guide vane (4), wherein a tool or an adhesive tape is needed to be used for protecting a non-shot blasting area, so that the surface of the non-shot blasting area is prevented from being damaged;
3) test piece for shot blasting strength by special test: carrying out strength test on an Almen A-type test piece, wherein the strength range needs to be ensured to be 0.4-0.45 mm;
4) shot blasting strengthening treatment is carried out on the surface of the main pump guide vane (4) of the nuclear power station by using a stainless steel shot material which is made of the same material as the guide vane (4) and has the diameter of 1mm, and through the jet pressure of 0.48-0.51MPa, the shot flow per minute of 9.8-10.2 kg and the nozzle moving speed of 150mm per minute, the distance between the nozzle (2) and the vane is 30 mm;
5) the method comprises the steps of cleaning the surfaces of the blades of the guide vanes (4) of the nuclear main pump by using zirconia ceramic pellets with the diameter of 125 mu m and through the spraying pressure of 0.35-0.4MPa, the pellet flow rate per minute of 3.5-4.0kg and the moving speed of a nozzle (2) with the diameter of 200mm per minute, wherein the distance between the nozzle and the blades is 30mm, so that the requirement that the final surface roughness Rz is less than 20 is met.
2. The surface shot peening strengthening process method for the guide vane blade of the main pump of the nuclear power station as claimed in claim 1, which is characterized in that: a six-axis industrial robot model IRB4600, manufactured by ABB corporation, was used to ensure the processing stability of the three parameters described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911353201.9A CN110951954A (en) | 2019-12-25 | 2019-12-25 | Surface shot blasting strengthening process method for guide vane blade of main pump of nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911353201.9A CN110951954A (en) | 2019-12-25 | 2019-12-25 | Surface shot blasting strengthening process method for guide vane blade of main pump of nuclear power station |
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| CN110951954A true CN110951954A (en) | 2020-04-03 |
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| CN201911353201.9A Pending CN110951954A (en) | 2019-12-25 | 2019-12-25 | Surface shot blasting strengthening process method for guide vane blade of main pump of nuclear power station |
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Citations (7)
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|---|---|---|---|---|
| EP1980631A1 (en) * | 2007-04-13 | 2008-10-15 | Siemens Aktiengesellschaft | Method for shot peening a turbine blade for the hot area of a gas turbine |
| CN101358271A (en) * | 2008-09-26 | 2009-02-04 | 无锡透平叶片有限公司 | Blade root surface strengthening method |
| CN101520404A (en) * | 2009-03-31 | 2009-09-02 | 无锡透平叶片有限公司 | Shot blasting check method for surface defects of blades |
| CN103160664A (en) * | 2013-03-20 | 2013-06-19 | 上海理工大学 | Method for performing surface strengthening treatment on stainless steel welding joint |
| CN103469200A (en) * | 2013-09-26 | 2013-12-25 | 重庆市科学技术研究院 | Method for preparing nanometer surface coating |
| CN105500216A (en) * | 2016-01-20 | 2016-04-20 | 哈尔滨飞机工业集团有限责任公司 | Shot peening strengthening technique of middleware of hub of helicopter rotor system |
| CN108977640A (en) * | 2018-09-10 | 2018-12-11 | 中石化四机石油机械有限公司 | A kind of stress peening process method of fracturing pump valve chamber |
-
2019
- 2019-12-25 CN CN201911353201.9A patent/CN110951954A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1980631A1 (en) * | 2007-04-13 | 2008-10-15 | Siemens Aktiengesellschaft | Method for shot peening a turbine blade for the hot area of a gas turbine |
| CN101358271A (en) * | 2008-09-26 | 2009-02-04 | 无锡透平叶片有限公司 | Blade root surface strengthening method |
| CN101520404A (en) * | 2009-03-31 | 2009-09-02 | 无锡透平叶片有限公司 | Shot blasting check method for surface defects of blades |
| CN103160664A (en) * | 2013-03-20 | 2013-06-19 | 上海理工大学 | Method for performing surface strengthening treatment on stainless steel welding joint |
| CN103469200A (en) * | 2013-09-26 | 2013-12-25 | 重庆市科学技术研究院 | Method for preparing nanometer surface coating |
| CN105500216A (en) * | 2016-01-20 | 2016-04-20 | 哈尔滨飞机工业集团有限责任公司 | Shot peening strengthening technique of middleware of hub of helicopter rotor system |
| CN108977640A (en) * | 2018-09-10 | 2018-12-11 | 中石化四机石油机械有限公司 | A kind of stress peening process method of fracturing pump valve chamber |
Non-Patent Citations (2)
| Title |
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| 沈正元等: ""H13钢表面高能喷丸纳米化"", 《2012年第十八届华东六省一市热处理年会》 * |
| 谢乐春等: ""弹簧材料的几种实用喷丸技术的探讨"", 《2010年全国弹簧学术会议论文集》 * |
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Application publication date: 20200403 |