CN103499714A - Method for manufacturing stator bar dual-stress testing device - Google Patents
Method for manufacturing stator bar dual-stress testing device Download PDFInfo
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- CN103499714A CN103499714A CN201310473963.9A CN201310473963A CN103499714A CN 103499714 A CN103499714 A CN 103499714A CN 201310473963 A CN201310473963 A CN 201310473963A CN 103499714 A CN103499714 A CN 103499714A
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Abstract
The invention discloses a method for manufacturing a stator bar dual-stress testing device. The testing device consists of a testing box body, a thermal stress application system, an electric stress application system and a temperature control system, wherein the testing box body is a heat-preservation cover, is designed into a cuboidal structure, and has high heat-preservation performance, and polyurethane foam panels are used for plates; a hole is drilled in the central position of the top of the box body, and a cylindrical epoxy glass cloth plate with high insulation performance and a through hole is arranged in the hole; a groove is formed in the left lateral surface of the box body, and a rectangular epoxy glass cloth plate with parallel grooves is attached to the groove; a hole is drilled in the central position of the back surface of the box body; a magnetic voltage regulator is used for heating a bar by using heavy current, and a silicon rectifier stack is integrated in the magnetic voltage regulator; a testing transformer is used for applying high voltage to the bar; a platinum resistor with accuracy of 0.1 DEG C is selected as a temperature measurement element; the temperature control system is used for controlling the whole heating process by adopting a path of overtemperature alarming and a path of silicon controlled rectifier triggered control.
Description
Technical field: the present invention relates to the two stress test device method for makings of a kind of stator bar
Background technology: along with the enforcement of national energy-saving reduction of discharging plan and Energy restructuring, need to build many large-scale nuclear energy units, vast capacity hydraulic generator unit and large-scale air cooling pumped storage machine, and the stator bar of these units will move under higher stress; For the reliability of check stator bar, according to the international standard requirement, need carry out two stress synergy aging tests to it, electric stress, thermal stress are combined aging test, and traditional associating ageing test apparatus is used heating mould or thermal conductive belt, and its shortcoming is:
1) test adopt the mode of external heat carry out and during the real electrical machinery operation heat serve as reasons interior to external diffusion, in type of heating, the practical function mechanism of the easy twisting stress of external heating mode, cause test failure.
2) heating mould and thermal conductive belt manufacturing cost are higher, for each line rod, all need to change specially mould, cause the waste on time and money.
3) for hydrogenerator, because there is oneself morphologic characteristics in each power station, therefore the stator bar in different power stations all there are differences to each other, and heating mould and conductive strips manufacture are complicated and be difficult for docile; Simultaneously, because the turbine generator stator bar experiment quantity is more, adopt heating mould will take greatly test space.
Therefore, exploitation meets generator actual motion stress characteristics, and energy-conservation, timesaving associating effect of stress test unit is very necessary and urgent.
Summary of the invention: the objective of the invention is the two stress synergy test units of practical, energy-conservation, the safe stator bar of exploitation, with the generator stator bar to various sizes, carry out two stress associating aging tests.Technical scheme of the present invention is:
The method for making of the two stress test devices of a kind of stator bar, the two stress test devices of stator bar are comprised of test casing, thermal stress application system, electric stress application system and temperature control system, and its method for making is as follows:
1) processing experiment casing: the test casing is rectangular structure, and the sheet material that is hot pressed into " three-in-one " structure by plastic-blasting cold-rolled steel sheet, polyurethane foam storehouse plate and corrosion resistant plate is assemblied to form; Place the aluminum alloy material testing table of rectangular structure in the test casing, the top center position of casing is drilled with the first through hole of φ 100mm, by upper section, be that the cylindrical epoxy glass-cloth board that φ 130mm, lower section are φ 100mm is inserted in the first through hole, the center of cylindrical epoxy glass-cloth board is drilled with the second through hole of φ 5mm; The left surface of casing has rectangular channel, and the rectangle epoxy resin bonded fiber, the position that is incorporated into rectangular channel, is had to two parallel rectangular channels on the rectangle epoxy resin bonded fiber, and the back side of casing is drilled with the third through-hole of φ 10.
2) design thermal stress application system: adopt inner set to have the magnetic voltage regulator of rectification silicon stack to carry out the D.C. high-current heating to line bar copper lead-in wire, determine the parameter of magnetic voltage regulator according to water power 26kV level stator bar; The input voltage of magnetic voltage regulator is 380V, and output voltage is 20V, and frequency is 50Hz, and maximum output current reaches 2600A; The anaerobic copper bar that to be drawn by the magnetic voltage regulator output terminal is connected on the lead-in wire of line rod through the rectangular channel on the epoxy resin bonded fiber in test casing left side; The type of heating of D.C. high-current is interior type of heating
3) design electric stress application system: apply high voltage in the insulation against ground of the online rod of service test transformer, according to the parameter that needs the confirmed test transformer of 2.0 times of rated voltages of 26kV level; The rated capacity of testing transformer is designed to 50kVA, frequency 50Hz, maximum output voltage 60kV; The copper conductor of being drawn by the testing transformer high-pressure side is connected on stator bar insulation against ground surface electrode via φ 5mm second through hole of the cylindrical epoxy glass-cloth board at test casing top
4) design temperature measurement and control system: the platinum resistance that choice accuracy is 0.1 ℃ is as temperature element, by the sensor of temperature element via the φ 10mm third through-hole colligation of test box back surface to the lead-in wire of line rod; Wrap at the temperature element sensor surface polyimide film tape that humidity index is 180 ℃; Temperature control system adopts a road overtemperature alarm, and the mode of a road thyristor trigger magnetic voltage regulator output current is carried out whole process to heating process and controlled.
Be different from traditional baking oven heating and heating plate type of heating, the mode that the present invention uses magnetic voltage regulator directly copper conductor to be heated, type of heating in, having simulated really generator diabatic process in stator bar in steady-state operation and transient state operational process, is the most effectual way of check stator bar operation electric stress; The length of test casing is designed to respectively 3800mm, 1800mm, 500mm, has met the two aging needs of stress of multiple capacity generator stator bar; The feature many for turbine generator stator bar quantity, that end is little, the test unit of inventing can be tested branched line rod in the single test process simultaneously, has saved greatly test period, test space and the valuable energy.
The accompanying drawing explanation:
Fig. 1 is two stress test device schematic diagram
Fig. 2 is the first through hole schematic diagram of test casing top center position
The vertical view that Fig. 3 is cylindrical epoxy glass-cloth board
The master that Fig. 4 is cylindrical epoxy glass-cloth board looks diagrammatic cross-section and the second through hole schematic diagram
Fig. 5 is the schematic diagram that the casing left surface has rectangular channel
Fig. 6 is the epoxy resin bonded fiber schematic diagram that has parallel slot
Embodiment:
As shown in Figure 1, the present invention is the two stress synergy test unit method for makings of a kind of brand-new stator bar, the two stress synergy test units of stator bar are comprised of test casing 1, thermal stress application system 2, electric stress application system 3 and temperature control system, and particular content is as follows:
1) processing experiment casing: the test casing is designed to rectangular structure, and length is respectively 4000mm, 2000mm, 1500mm, and the sheet material that is hot pressed into " three-in-one " structure by plastic-blasting cold-rolled steel sheet, polyurethane foam storehouse plate and corrosion resistant plate is assemblied to form; Place the aluminum alloy material testing table of rectangular structure in the test casing, length is respectively 3800mm, 1800mm and 500mm; As shown in Figure 2, the top center position of casing is drilled with the first through hole 4 of φ 100mm; As shown in Figure 3,4, by upper section, be that the cylindrical epoxy glass-cloth board 5 that φ 130mm, lower section are φ 100mm is inserted in the first through hole 4; As shown in Figure 4, the center of cylindrical epoxy glass-cloth board 5 is drilled with the second through hole 6 of φ 5mm; As shown in Figure 5, the left surface of casing has the rectangular channel 7 that length and width is respectively 300mm, 200mm; As shown in Figure 6, by 8 positions that are incorporated into rectangular channel 7 of the rectangle epoxy resin bonded fiber of length and width, the thick 320mm of being respectively, 220mm, 20mm; As shown in Figure 6, have two parallel rectangular channels 9 on the rectangle epoxy resin bonded fiber, its height, wide 150mm, the 25mm of being respectively; As shown in Figure 1, the back side of casing is drilled with the third through-hole 10 of φ 10mm
2) design thermal stress application system: adopt inner set that the magnetic voltage regulator of rectification silicon stack is arranged, low-voltage, High-current output, line bar copper lead-in wire is carried out to the D.C. high-current heating, determine the parameter of magnetic voltage regulator according to water power 26kV level stator bar: the input voltage of magnetic voltage regulator is 380V, output voltage is 20V, frequency is 50Hz, and maximum output current reaches 2600A; The anaerobic copper bar that to be drawn by the magnetic voltage regulator output terminal is connected on the lead-in wire of line rod through the rectangular channel 9 on test casing left surface epoxy resin bonded fiber 8; The D.C. high-current type of heating is interior heating, is the best mode of simulation generator heat transfer model
3) design electric stress application system: apply high voltage in the insulation against ground of the online rod of service test transformer, according to the parameter that needs the confirmed test transformer of 2.0 times of rated voltages of 26kV level; The rated capacity of testing transformer is designed to 50kVA, frequency 50Hz, maximum output voltage 60kV; The copper conductor of being drawn by the testing transformer high-pressure side is connected on stator bar insulation against ground surface electrode via φ 5mm second through hole 6 of the cylindrical epoxy glass-cloth board 5 at test casing top
4) design temperature measurement and control system: the platinum resistance that choice accuracy is 0.1 ℃ is as temperature element, by the sensor of temperature element via φ 10mm third through-hole 10 colligations of test box back surface to the copper lead-in wire of line rod; Wrap at the temperature element sensor surface polyimide film tape that humidity index is 180 ℃; Temperature control system adopts a road overtemperature alarm, and the mode of a road thyristor trigger magnetic voltage regulator output current is carried out whole process to heating process and controlled.
Claims (1)
1. two stress test device method for makings of a stator bar, it is characterized in that: the two stress test devices of stator bar are comprised of test casing (1), thermal stress application system (2), electric stress application system (3) and temperature control system, and its method for making is as follows:
1) processing experiment casing: the test casing is rectangular structure, and the sheet material that is hot pressed into " three-in-one " structure by plastic-blasting cold-rolled steel sheet, polyurethane foam storehouse plate and corrosion resistant plate is assemblied to form; Place the aluminum alloy material testing table of rectangular structure in the test casing, the top center position of casing is drilled with the first through hole (4) of φ 100mm, by upper section, be that the cylindrical epoxy glass-cloth board (5) that φ 130mm, lower section are φ 100mm is inserted in the first through hole (4), the center of cylindrical epoxy glass-cloth board (5) is drilled with the second through hole (6) of φ 5mm; The left surface of casing has rectangular channel (7), by rectangle epoxy resin bonded fiber (8) the position that is incorporated into rectangular channel (7), have two parallel rectangular channels (9) on rectangle epoxy resin bonded fiber (8), the back side of casing is drilled with the third through-hole (10) of φ 10;
2) design thermal stress application system: adopt inner set to have the magnetic voltage regulator of rectification silicon stack to carry out the D.C. high-current heating to line bar copper lead-in wire, determine the parameter of magnetic voltage regulator according to water power 26kV level stator bar, the input voltage of magnetic voltage regulator is 380V, output voltage is 20V, frequency is 50Hz, and maximum output current reaches 2600A; The anaerobic copper bar that to be drawn by the magnetic voltage regulator output terminal is connected on the lead-in wire of line rod through the rectangular channel (9) on the epoxy resin bonded fiber (8) in test casing left side, and the type of heating of D.C. high-current is interior type of heating;
3) design electric stress application system: in the insulation against ground of the online rod of service test transformer, apply high voltage, the parameter that needs the confirmed test transformer according to 2.0 times of rated voltages of 26kV level, the rated capacity of testing transformer is designed to 50kVA, frequency 50Hz, maximum output voltage 60kV; The copper conductor of being drawn by the testing transformer high-pressure side is connected on stator bar insulation against ground surface electrode via φ 5 second through holes (6) of the cylindrical epoxy glass-cloth board (5) at test casing top;
4) design temperature measurement and control system: the platinum resistance that choice accuracy is 0.1 ℃ is as temperature element, by the sensor of temperature element via φ 10 third through-holes (10) colligation of test box back surface to the lead-in wire of line rod; Wrap at the temperature element sensor surface polyimide film tape that humidity index is 180 ℃; Temperature control system adopts a road overtemperature alarm, and the mode of a road thyristor trigger magnetic voltage regulator output current is carried out whole process to heating process and controlled.
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| CN201310473963.9A CN103499714A (en) | 2013-10-12 | 2013-10-12 | Method for manufacturing stator bar dual-stress testing device |
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| CN201310473963.9A CN103499714A (en) | 2013-10-12 | 2013-10-12 | Method for manufacturing stator bar dual-stress testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646152A (en) * | 2018-05-11 | 2018-10-12 | 哈动国家水力发电设备工程技术研究中心有限公司 | A kind of method of polarization/depolarization current method check and evaluation stator bar insulation ag(e)ing state |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6005288A (en) * | 1996-02-08 | 1999-12-21 | Micron Technology, Inc. | Compliant contact system with alignment structure for testing unpackaged semiconductor device |
| EP1586680A2 (en) * | 2004-03-30 | 2005-10-19 | Yamamoto-Ms Co, Ltd. | Program and system for measuring internal stress of an electroplated film |
| CN101718661A (en) * | 2009-12-17 | 2010-06-02 | 哈尔滨电机厂有限责任公司 | Manufacturing method of thermal cycling test device of turbine generator stator bar |
| CN101813716A (en) * | 2009-12-07 | 2010-08-25 | 哈尔滨电机厂有限责任公司 | Manufacturing method of large generator stator bar electrical-heating aging test device |
| CN103323254A (en) * | 2013-06-28 | 2013-09-25 | 中国人民解放军军事交通学院 | Experiment device for regulating engine different angles in variable valve different lifting method |
-
2013
- 2013-10-12 CN CN201310473963.9A patent/CN103499714A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6005288A (en) * | 1996-02-08 | 1999-12-21 | Micron Technology, Inc. | Compliant contact system with alignment structure for testing unpackaged semiconductor device |
| EP1586680A2 (en) * | 2004-03-30 | 2005-10-19 | Yamamoto-Ms Co, Ltd. | Program and system for measuring internal stress of an electroplated film |
| CN101813716A (en) * | 2009-12-07 | 2010-08-25 | 哈尔滨电机厂有限责任公司 | Manufacturing method of large generator stator bar electrical-heating aging test device |
| CN101718661A (en) * | 2009-12-17 | 2010-06-02 | 哈尔滨电机厂有限责任公司 | Manufacturing method of thermal cycling test device of turbine generator stator bar |
| CN103323254A (en) * | 2013-06-28 | 2013-09-25 | 中国人民解放军军事交通学院 | Experiment device for regulating engine different angles in variable valve different lifting method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646152A (en) * | 2018-05-11 | 2018-10-12 | 哈动国家水力发电设备工程技术研究中心有限公司 | A kind of method of polarization/depolarization current method check and evaluation stator bar insulation ag(e)ing state |
| CN108646152B (en) * | 2018-05-11 | 2021-05-25 | 哈动国家水力发电设备工程技术研究中心有限公司 | Method for detecting and evaluating insulation aging state of stator bar by polarization/depolarization current method |
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Application publication date: 20140108 |