CN102128711A - Method for adjusting inner chamber plugging plate for cylinder hydrostatic test of steam turbine - Google Patents
Method for adjusting inner chamber plugging plate for cylinder hydrostatic test of steam turbine Download PDFInfo
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- CN102128711A CN102128711A CN 201010611032 CN201010611032A CN102128711A CN 102128711 A CN102128711 A CN 102128711A CN 201010611032 CN201010611032 CN 201010611032 CN 201010611032 A CN201010611032 A CN 201010611032A CN 102128711 A CN102128711 A CN 102128711A
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- closure plate
- chamber closure
- screw rod
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Abstract
The invention provides a method for adjusting an inner chamber plugging plate for a cylinder hydrostatic test of a steam turbine. The method comprises the following steps of: before adjustment, respectively calculating theoretic adjustment values of a thread plunger and a jackscrew threaded rod according to the sizes of the inner chamber plugging plate, a sealing ring, the thread plunger and the jackscrew threaded rod; after adjustment, measuring an effective length of the thread plunger and an axial displacement value of the jackscrew threaded rod; comparing the effective length and the axial displacement value with the theoretic adjustment values so as to determine a sealing condition of the inner chamber plugging plate; and if the effective length and the axial displacement value are different from the theoretic adjustment values, adjusting the effective length of the thread plunger and the axial displacement value of the jackscrew threaded rod again to be equal to the theoretic adjustment values of the thread plunger and the jackscrew threaded rod. By using the technical scheme of the quantified adjustment, a sealing pressure of the inner chamber plugging plate can meet a test requirement, so the sealing gap is uniform, the sealing effect of the inner chamber plugging plate is improved, the success rate of the hydrostatic test can be guaranteed, and the period of the hydrostatic test is shortened. The hydrostatic test on a cylinder having a plurality of working pressure sections can be popularized well; and the method is especially applicable to nuclear turbines, fossil turbines, gas turbines and the like.
Description
Technical field
The present invention relates to the steam turbine field, specifically is the process of adjusting closure plate in a kind of steam turbine hydraulic testing.
Background technology
Steam turbine is in the generator operation process, its large component such as high pressure outer shell bear the steam of high temperature, high pressure, require its intensity to be guaranteed, therefore after cylinder finishing, need the countercylinder body to check, check that whether it exists infiltration or crackle is arranged, and goes into operation steam turbine safety after the passed examination again.The countercylinder body is checked, adopts the mode of the hydraulic testing usually, checks whether cylinder has the intensity of crackle and cylinder whether qualified.
As shown in Figure 1, be provided with several inner chamber closure plates (2,3,4) in the high pressure outer shell in nuclear steam turbine, make to constitute a plurality of chambers such as B, C, D in the high pressure outer shell, carry out the hydraulic testing respectively.This hydraulic testing has a plurality of pressure stages, a plurality of chambers such as corresponding B, C, D, and corresponding its working pressure of its test pressure value, therefore, the force value difference of each chamber.Carry out before the hydraulic testing, must carry out pretension to inner chamber closure plate (2,3,4) respectively, adjust the closure plate position, make each chamber secure closed.The former process of adjusting inner chamber closure plate (2,3,4) is as follows:
(1) at first cylinder 1 is narrowed up and down and behind tight each bolt of split, because the operator can't enter B, C chamber, inner chamber closure plate 2 can only rely on the operator to enter the D chamber and adjust indirectly, the operator enters the D chamber, the nut 10 on tight each bolt 7, unclamp each nut 8, hold out against each nut 9 till the top is motionless, whether inner chamber closure plate 3 and inner chamber closure plate 4 seal and put in place by rule of thumb.
(2) hold out against each jackscrew screw rod 5,, judge by rule of thumb whether inner chamber closure plate 2 seals to put in place tightly respectively covering nut 6.
Because the size restrictions and the safety factor of B, C chamber, the operator can't enter B, C chamber, can only adjust inner chamber closure plate (2,3,4) in the D chamber.Therefore, the operator can only rely on intuition and experience that inner chamber closure plate 2 is adjusted, and by adjusting the threaded mandrel 7 on inner chamber closure plate 3 flanges, controls the pretightning force of inner chamber closure plate 2, is easy to cause inner chamber closure plate (2,3,4) sealing not in place like this.Because the operator can't obtain definite information, judge whether pretension of inner chamber closure plate 2, adopt this mode pretension, make that probably 2 sealings of inner chamber closure plate are not in place.In the process of the hydraulic testing, in case inner chamber closure plate 2 sealing is not in place, inner chamber closure plate 2 is scurried pressure in the process of boosting after will making cylinder fill, and makes the hydraulic testing successfully to carry out.In case find this situation, will take following steps to solve immediately: each closure plate of inner chamber → heating split bolt and unclamp → open cylinder inspection → ressemble inner chamber closure plate → tight split bolt → adjustment inner chamber closure plate → pour water → suppress discharges water → unclamps.Thus, seriously delay the hydraulic testing cycle, cause very big pressure for production and operator.Suppress in the process,, also can cause the O-ring seal on the inner chamber closure plate to come off, like this just need open cylinder, fitting tight circle once more again, delay the test period because that dynamics is grasped is improper.
Summary of the invention
The object of the present invention is to provide a kind of steam turbine hydraulic testing that is used for, the process that in high-pressure chamber, just can accurately adjust all inner chamber closure plates.
The technical solution adopted in the present invention is:
A kind of method of adjustment of steam turbine hydraulic testing inner chamber closure plate, be provided with several inner chamber closure plates in the described cylinder, respectively with cylinder inner wall on corresponding locating ring cooperate, the cylinder internal space is isolated into a plurality of chambers, described inner chamber closure plate has flange, the back of the body end face of flange cooperates with locating ring, and mating surface is provided with O-ring seal; Wherein, the a pair of inner chamber closure plate 3,4 that constitutes high-pressure chamber is arranged in opposite directions, withstand the positive end face of two inner chamber closure plate flanges by threaded mandrel, by adjusting the effective length of threaded mandrel, two inner chamber closure plates 3,4 are held out against respectively on the locating ring that is fixed on separately, and inner chamber closure plate 2 constitutes the sub-high pressure chamber with inner chamber closure plate 3, is provided with the jackscrew screw rod on the flange of inner chamber closure plate 3, by adjusting the axial displacement of this jackscrew screw rod, inner chamber closure plate 2 held out against be fixed on its locating ring; Before adjusting, elder generation is according to the size of inner chamber closure plate, O-ring seal, threaded mandrel, jackscrew screw rod, calculate the theoretical adjustment amount of threaded mandrel, jackscrew screw rod respectively, after the adjustment, measure the effective length of threaded mandrel, its length increment and theoretical adjustment amount are compared, thereby judge the sealing condition of inner chamber closure plate 3,4, if the effective length increment of threaded mandrel and theoretical adjustment amount are inconsistent, then adjust once more, equal theoretical adjustment amount until the effective length increment of threaded mandrel; Measure the axial displacement of jackscrew screw rod, itself and theoretical adjustment amount are compared, thus the sealing condition of judgement inner chamber closure plate 2, if the axial displacement of jackscrew screw rod and theoretical adjustment amount are inconsistent, then adjust once more, equal theoretical adjustment amount until the axial displacement of jackscrew screw rod.
The effective length increment of described threaded mandrel transferred to equal theoretical adjustment amount, make the sealing load of inner chamber closure plate 3,4 meet the rules requirement; The axial displacement of described jackscrew screw rod transferred to equal theoretical adjustment amount, make the sealing load of inner chamber closure plate 2 meet the rules requirement.
Be provided with some threaded mandrels between the end face of flange of described inner chamber closure plate 3,4, circumferentially evenly arrange, whether consistent by the effective length increment of all threaded mandrels relatively, judge whether the seal clearance of inner chamber closure plate 3,4 is even.
Whether the end face of flange of described inner chamber closure plate 2 is provided with some jackscrew screw rods, circumferentially evenly arranges, consistent by the axial displacement of all jackscrew screw rods relatively, judges whether the seal clearance of inner chamber closure plate 2 is even.
The beneficial effect that the present invention produces is:
The technical scheme that the present invention adopts above-mentioned quantification to regulate can guarantee that the sealing load of inner chamber closure plate meets requirement of experiment, and seal clearance is even, has improved the sealing effectiveness of inner chamber closure plate, can guarantee the success ratio of the hydraulic testing, has shortened the hydraulic testing cycle.The hydraulic testing of the multiplex (MUX) being made the cylinder of pressure stage has excellent popularization value, is specially adapted to the hydraulic testing of nuclear power high pressure outer shell, equally also is applicable to the process of multi-cavity chamber hydraulic testings adjustment closure plates such as thermoelectricity, combustion machine.
Description of drawings
Fig. 1 is the structural representation of the cylinder hydraulic testing inner chamber closure plate of nuclear steam turbine;
Fig. 2 is the dimensional structure synoptic diagram of push rod;
Fig. 3 is the dimensional structure synoptic diagram of inner chamber closure plate;
Fig. 4 is the dimensional structure synoptic diagram of the cylinder hydraulic testing inner chamber closure plate of nuclear steam turbine of the present invention;
Fig. 5 is the dimensional structure synoptic diagram of jackscrew screw rod of the present invention;
Fig. 6 is the dimensional structure synoptic diagram of locating ring of the present invention and inner chamber closure plate;
Number in the figure is represented: the 1-cylinder, and 2-inner chamber closure plate, 3-inner chamber closure plate, 4-inner chamber closure plate, 5-jackscrew screw rod, 6-covers nut, 7-threaded mandrel, 8-nut, 9-nut, 10-nut.
Embodiment
The present invention is a kind of method of adjustment of steam turbine hydraulic testing inner chamber closure plate, and the cylinder hydraulic testing with nuclear steam turbine is an example below, and the concrete steps of this method are described:
As shown in Figure 4, be provided with 3 inner chamber closure plates (2,3,4) in the cylinder 1 of nuclear steam turbine, respectively with cylinder 1 inwall on corresponding locating ring cooperate, make to constitute a plurality of chambers (B, C, D) in the cylinder 1, wherein the D chamber is a high-pressure chamber.The circumferential section edge of inner chamber closure plate (2,3,4) is provided with flange, and flange back of the body end face cooperates with locating ring, and mating surface is provided with O-ring seal.O-ring seal is the India rubber circle, can compress in its elastically-deformable scope and relax.Wherein, the inner chamber closure plate of high-pressure chamber D both sides (3,4) is arranged in opposite directions, withstand the positive end face of inner chamber closure plate (3,4) flange by threaded mandrel 7,, two inner chamber closure plates (3,4) are held out against respectively on the locating ring that is fixed on separately by adjusting the effective length of threaded mandrel 7.Inner chamber closure plate 2 constitutes the sub-high pressure cavity C with inner chamber closure plate 3, is provided with jackscrew screw rod 5 on the flange of inner chamber closure plate 3, by adjusting the axial displacement of this jackscrew screw rod 5, inner chamber closure plate 2 is held out against is fixed on its locating ring.Threaded mandrel 7 has some, circumferentially is evenly arranged between the end face of flange of inner chamber closure plate (3,4), and threaded mandrel 7 two ends have screw thread, and nut 8 and nut 9, the other end that an end is connected with symmetric arrangement are provided with nut 10.Jackscrew screw rod 5 also has some, circumferentially be evenly arranged on the end face of flange of inner chamber closure plate 2, jackscrew screw rod 5 passes the flange of inner chamber closure plate 3, extend into the inside of the D of high-pressure chamber, the end of jackscrew screw rod 5 is acting devices of axial adjustment member, is provided with screw thread and is mated corresponding cover nut 6.
As Fig. 5, shown in Figure 6, the step of the concrete method of adjustment of inner chamber closure plate (2,3,4) is:
(1) inner chamber closure plate (2,3,4) is installed to the relevant position of cylinder alignment ring, before merging upper and lower half cylinder 1, measure the distance between inner chamber closure plate (2,3, the 4) locating ring, that is: between the distance A between D chamber locating ring end face and the E chamber locating ring end face, B chamber locating ring end face and the D chamber locating ring end face apart from B; Distance C between inner chamber closure plate 3 end face of flange and inner chamber closure plate 4 end face of flange; Distance D between D chamber locating ring end face and inner chamber closure plate 3 end face of flange; Between inner chamber closure plate 4 end face of flange and the E chamber locating ring end face apart from E; The length L of jackscrew screw rod 5 (as shown in Figure 2); Distance H 4(between distance H 3 between distance H 2 between inner chamber closure plate 2 end face of flange and the O-ring seal top, inner chamber closure plate 3 end face of flange and the O-ring seal top, inner chamber closure plate 4 end face of flange and the O-ring seal top as shown in Figure 3); Jackscrew screw rod 5 movable ends terminal to inner chamber closure plate 3 end face of flange apart from F.Apart from F, i.e. the partial-length of jackscrew screw rod 5 in the D of high-pressure chamber, distance H refers to the gauge of end face of flange to the high point of O-ring seal, and the dimensional tolerence of the length L of all jackscrew screw rods 5 is controlled in the 0.2mm.
(2) by elasticity coefficient, performance index and the size of O-ring seal and the rules requirement of sealing etc., theoretical decrement △ H2, △ H3 and △ H4 when calculating O-ring seal on inner chamber closure plate (2,3, the 4) end face of flange and effectively sealing, this theory decrement is the effective scope of sealing often.Therefore, the theoretical adjustment amount f that draws jackscrew screw rod 5 is: △ H2, the theoretical adjustment amount c of threaded mandrel 7 is: △ H3+ △ H4.△ H2, △ H3 and △ H4 are generally in 2mm.
Theoretical decrement when calculating O-ring seal if having no idea and effectively sealing, also can be in practical operation: earlier tight inner chamber closure plate (3,4), calculate the method for the theoretical adjustment amount f that tries to achieve jackscrew screw rod 5 again, the adjustment that inner chamber closure plate 2 is quantized again, method is in the following step:
(3) merge upper and lower half cylinder 1, tight each bolt of split, the operator enters the D chamber, and the nut 10 on the tight D of the high-pressure chamber internal thread push rod 7 makes threaded mandrel 7 not rotate; Take off nut 8, coarse adjustment nut 9, symmetry is finely tuned the nut 9 on the threaded mandrel 7 again, thereby regulates the effective length increment of threaded mandrel 7, and inner chamber closure plate (3,4) is oppositely held out against on locating ring separately.And measure the effective length of threaded mandrel 7, promptly adjust distance C between rear interior cavity closure plate 3 flanges and inner chamber closure plate 4 flanges '.
After the adjustment, with its length increment △ C(△ C=C '-C) and theoretical adjustment amount c(c=△ H3+ △ H4) relatively, thus judge the sealing condition of inner chamber closure plate (3,4).If the effective length increment △ C of threaded mandrel 7 and theoretical adjustment amount c are inconsistent, then adjust once more, equal theoretical adjustment amount c until the effective length increment △ of threaded mandrel 7 C.And relatively whether the effective length increment △ C of all threaded mandrels 7 is consistent, thereby whether the seal clearance of judging inner chamber closure plate (3,4) is even.The tolerance of the effective length C ' of each threaded mandrel 7 is controlled in the 0.5mm.
If c, f the unknown, then can be by actual judgement inner chamber closure plate (3,4) the state that holds out against, when inner chamber closure plate (3, when 4) holding out against, by measure distance D between D chamber locating ring end face and inner chamber closure plate 3 end face of flange ' and inner chamber closure plate 4 end face of flange and E chamber locating ring end face between apart from E ', because the distance C between adjustment rear interior cavity closure plate 3 flanges and inner chamber closure plate 4 flanges '=A-D '-E ', calculate when inner chamber closure plate (3, when 4) effectively sealing, inner chamber closure plate (3,4) decrement of Biao Mian elastic string is respectively: D '-D and E '-E, calculate again: the theoretical adjustment amount f of jackscrew screw rod 5, f=△ H2=H2+L-B-D '-F.
(1) symmetry holds out against jackscrew screw rod 5, measure the movable end of jackscrew screw rod 5 terminal to inner chamber closure plate 3 end face of flange apart from F ', calculate the axial displacement △ F=F '-F=H2-H ' 2 of jackscrew screw rod 5, wherein H ' 2 is the distance that inner chamber closure plate 3 is adjusted between its end face of flange of back and the O-ring seal top.△ F and theoretical adjustment amount f are compared, thus the sealing condition of judgement inner chamber closure plate 2.If the axial displacement △ F of jackscrew screw rod 5 and theoretical adjustment amount f are inconsistent, then adjust once more, equal theoretical adjustment amount f until the axial displacement △ of jackscrew screw rod 5 F.So, being about to this inner chamber closure plate 2 holds out against, seals.The axial displacement △ F of all jackscrew screw rods 5 transferred to equal theoretical adjustment amount f, make the sealing load of inner chamber closure plate 2 meet the rules requirement.And relatively whether the axial displacement △ F of all jackscrew screw rods 5 is consistent, thereby whether the seal clearance of judging inner chamber closure plate 2 is even.The tolerance of the effective length F ' of each jackscrew screw rod 5 is controlled in the 0.5mm.
(2), check and cleaning D chamber all the cover nuts 6 on tight all jackscrew screw rods 5.
Claims (4)
1. the method for adjustment of a steam turbine hydraulic testing inner chamber closure plate, be provided with several inner chamber closure plates in the described cylinder, respectively with cylinder inner wall on corresponding locating ring cooperate, the cylinder internal space is isolated into a plurality of chambers, described inner chamber closure plate has flange, the back of the body end face of flange cooperates with locating ring, and mating surface is provided with O-ring seal; Wherein, the a pair of inner chamber closure plate (3,4) that constitutes high-pressure chamber is arranged in opposite directions, withstand the positive end face of two inner chamber closure plate flanges by threaded mandrel, by adjusting the effective length of threaded mandrel, two inner chamber closure plates (3,4) are held out against respectively on the locating ring that is fixed on separately, inner chamber closure plate (2) constitutes the sub-high pressure chamber with inner chamber closure plate (3), on the flange of inner chamber closure plate (3), be provided with the jackscrew screw rod, by adjusting the axial displacement of this jackscrew screw rod, inner chamber closure plate (2) held out against be fixed on its locating ring; It is characterized in that, before adjusting, elder generation is according to the size of inner chamber closure plate, O-ring seal, threaded mandrel, jackscrew screw rod, calculate the theoretical adjustment amount of threaded mandrel, jackscrew screw rod respectively, after the adjustment, measure the effective length of threaded mandrel, its length increment and theoretical adjustment amount are compared, thereby judge the sealing condition of inner chamber closure plate (3,4), if the effective length increment of threaded mandrel and theoretical adjustment amount are inconsistent, then adjust once more, equal theoretical adjustment amount until the effective length increment of threaded mandrel; Measure the axial displacement of jackscrew screw rod, itself and theoretical adjustment amount are compared, thus the sealing condition of judgement inner chamber closure plate (2), if the axial displacement of jackscrew screw rod and theoretical adjustment amount are inconsistent, then adjust once more, equal theoretical adjustment amount until the axial displacement of jackscrew screw rod.
2. the method for adjustment of steam turbine hydraulic testing inner chamber closure plate according to claim 1 is characterized in that: the effective length increment of described threaded mandrel is transferred to equal theoretical adjustment amount, make the sealing load of inner chamber closure plate (3,4) meet the rules requirement; The axial displacement of described jackscrew screw rod transferred to equal theoretical adjustment amount, make the sealing load of inner chamber closure plate (2) meet the rules requirement.
3. the method for adjustment of steam turbine hydraulic testing inner chamber closure plate according to claim 1, it is characterized in that: be provided with some threaded mandrels between the end face of flange of described inner chamber closure plate (3,4), circumferentially evenly arrange, whether the effective length increment by all threaded mandrels relatively is consistent, judges whether the seal clearance of inner chamber closure plate (3,4) is even.
4. the method for adjustment of steam turbine hydraulic testing inner chamber closure plate according to claim 1, it is characterized in that: the end face of flange of described inner chamber closure plate (2) is provided with some jackscrew screw rods, circumferentially evenly arrange, whether the axial displacement by all jackscrew screw rods relatively is consistent, judges whether the seal clearance of inner chamber closure plate (2) is even.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010611032A CN102128711B (en) | 2010-12-29 | 2010-12-29 | Method for adjusting inner chamber plugging plate for cylinder hydrostatic test of steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010611032A CN102128711B (en) | 2010-12-29 | 2010-12-29 | Method for adjusting inner chamber plugging plate for cylinder hydrostatic test of steam turbine |
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| CN102128711A true CN102128711A (en) | 2011-07-20 |
| CN102128711B CN102128711B (en) | 2012-10-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364157A (en) * | 2013-07-30 | 2013-10-23 | 东方电气集团东方汽轮机有限公司 | System and method for testing water pressure of turbine cylinder |
| JP2015132257A (en) * | 2014-01-15 | 2015-07-23 | 斗山重工業株式会社 | Hydraulic pressure test device and hydraulic pressure test method for high pressure turbine |
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| CN2574043Y (en) * | 2002-10-30 | 2003-09-17 | 东方汽轮机厂 | Sectional mandrel water pressure testing device |
| CN2655223Y (en) * | 2003-11-07 | 2004-11-10 | 东方汽轮机厂 | Sealer for high-pressure external cylinder, valve water pressure testing pipe mouth |
| CN201327460Y (en) * | 2008-12-30 | 2009-10-14 | 上海锅炉厂有限公司 | Filling-up plate device for pipeline hydrotest |
| CN101655435A (en) * | 2008-12-10 | 2010-02-24 | 上海电气电站设备有限公司 | High pressure cylinder water pressure test device of combined cycle steam turbine |
| CN201522405U (en) * | 2009-10-27 | 2010-07-07 | 中冶东北建设有限公司结构制造安装工程公司 | Water pressure tester of steel tube |
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2010
- 2010-12-29 CN CN201010611032A patent/CN102128711B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2574043Y (en) * | 2002-10-30 | 2003-09-17 | 东方汽轮机厂 | Sectional mandrel water pressure testing device |
| CN2655223Y (en) * | 2003-11-07 | 2004-11-10 | 东方汽轮机厂 | Sealer for high-pressure external cylinder, valve water pressure testing pipe mouth |
| CN101655435A (en) * | 2008-12-10 | 2010-02-24 | 上海电气电站设备有限公司 | High pressure cylinder water pressure test device of combined cycle steam turbine |
| CN201327460Y (en) * | 2008-12-30 | 2009-10-14 | 上海锅炉厂有限公司 | Filling-up plate device for pipeline hydrotest |
| CN201522405U (en) * | 2009-10-27 | 2010-07-07 | 中冶东北建设有限公司结构制造安装工程公司 | Water pressure tester of steel tube |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364157A (en) * | 2013-07-30 | 2013-10-23 | 东方电气集团东方汽轮机有限公司 | System and method for testing water pressure of turbine cylinder |
| JP2015132257A (en) * | 2014-01-15 | 2015-07-23 | 斗山重工業株式会社 | Hydraulic pressure test device and hydraulic pressure test method for high pressure turbine |
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| CN102128711B (en) | 2012-10-10 |
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