CN102588008B - Three-point centring adjustment device for low-pressure shaft end steam seal of steam turbine - Google Patents
Three-point centring adjustment device for low-pressure shaft end steam seal of steam turbine Download PDFInfo
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- CN102588008B CN102588008B CN201210072441.3A CN201210072441A CN102588008B CN 102588008 B CN102588008 B CN 102588008B CN 201210072441 A CN201210072441 A CN 201210072441A CN 102588008 B CN102588008 B CN 102588008B
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Abstract
The invention discloses a three-point centring adjustment device for a low-pressure shaft end steam seal of a steam turbine. Three adjusting bolts and three adjusting nuts correspondingly screwed on the adjusting bolts are respectively arranged on left and right sides of a flange, close to a horizontal split, of a lower half perpendicular surface of a low-pressure shaft end steam seal body and the bottom of the lower-pressure shaft end steam seal body, and the three bolts and the corresponding three nuts jointly form a three-point centring structure. By the aid of analysis to actual adjustment assembly, operation conditions and the like, the three-point centring adjustment device can meet requirements on operation and service of the steam turbine, has enough adjustment precision, is simple in structure and convenient in operations including processing, installation, repair and the like, and has good economical efficiency and stability. In addition, the device is simple in structure and high in generality, adjustment precision is higher by the aid of the low-pressure shaft end steam seal of the device, adjustment centring is more accurate by the aid of a rotor and a main shaft, and a sealing effect of the shaft end steam seal is better.
Description
Technical field
The present invention relates to a kind of three-point centring adjustment device for low-pressure shaft end steam seal of steam turbine, be specially adapted to the low pressure axle head gap regudation of steam sealing of large-scale condensing steam turbine.
Background technique
Steam turbine is made up of stator and rotor portion, the High Rotation Speed class power equipment that is mechanical energy by the thermal power transfer of acting working substance steam.Its low-pressure section of large-scale condensing steam turbine is operated in subatmospheric negative pressure state, and it is the leakage in order to prevent steam/air in sound part gap that steam turbine arranges shaft end gland seal structure, the quality of impact acting working medium.
The general housing of condensing steam turbine low pressure shaft end gland seal is cast inblock, assembling labyrinth ring structure, utilize flange to be connected with low pressure (LP) cylinder, this kind of mode of structure easily installed generation bias because Bolt to position deviation causes low pressure shaft end gland seal, thereby in the process of steam turbine operation, make low pressure shaft end gland seal labyrinth strip and rotor macro-axis along the circumferential direction come in contact friction, thereby axle head dynamic and static gaps is increased, be unfavorable for the sealing of low pressure axle head steam/air and cause gas leakage, reduce the operational efficiency of steam turbine, affect the quality of working medium simultaneously.
Summary of the invention
The object of the invention is for overcoming above-mentioned the deficiencies in the prior art, a kind of three-point centring adjustment device for low-pressure shaft end steam seal of steam turbine is provided, this apparatus structure is simple, highly versatile, adopt the low pressure shaft end gland seal of this device in installation process, to adjust precision higher, more accurate with the large axial adjustment centering of rotor, shaft end gland seal sealing effect is better.
For achieving the above object, the present invention adopts following technical proposals:
A kind of three-point centring adjustment device for low-pressure shaft end steam seal of steam turbine, at second vertical surface flange of low pressure axle head labyrinth casing near the horizontal flange left and right sides, and the bottom of low pressure axle head labyrinth casing is respectively equipped with one and adjusts bolt and one and be spun on the adjusting nut of adjusting on bolt, described three screw bolt and nut form three points centering structure jointly.
The adjustment bolt of the described low pressure axle head labyrinth casing left and right sides and adjusting nut substantially horizontal arrange.
Adjustment bolt and the adjusting nut vertical direction of described low pressure axle head labyrinth casing bottom arrange.
Described adjustment bolt and low pressure axle head labyrinth casing are threaded connection, and the adjustment nut that centering adjustment is finished the adjustment bolt of rear left and right side setting all contacts with low pressure (LP) cylinder steam discharge cone internal face, and the adjustment nut that bottom is adjusted on bolt contacts with low pressure (LP) cylinder support block.
The present invention is by the each shaft end gland seal centering adjustment device that adopts an adjustment bolt and adjusting nut to form in bottom near the horizontal flange left and right sides and shaft end gland seal body at second vertical surface flange of low pressure axle head labyrinth casing, adjusting bolt is connected by screw thread with low pressure axle head labyrinth casing, the nut that centering adjustment finishes to adjust bolt in rear left and right contacts with low pressure (LP) cylinder steam discharge cone internal face, and bottom is adjusted bolt nut and contacted with low pressure (LP) cylinder support block.
By measuring the gap of shaft end gland seal labyrinth ring gear piece and rotor macro-axis, to the shaft end gland seal adjustment of feeling relieved, adjust the adjusting nut counterrotating on bolt, adjust bolt and low pressure axle head labyrinth casing screw-thread fit, form three points centering and adjust mode, be conducive to adjust fast low pressure shaft end gland seal and labyrinth ring assembling, make it concentric with turbine rotor macro-axis, keep the gap of sound part, reach design and operation requirement, reduce the mill that touches of low pressure axle head gland sealing gear sheet and turbine rotor macro-axis, improve the working effect of low pressure shaft end gland seal, reduce steam/air amount of leakage, improve steam turbine operation efficiency.
The present invention, by analyses such as actual adjustment assembly and runnabilitys, can meet steam turbine operation usage requirement, has enough adjustment precision, simple in structure, is convenient to the operations such as processing, installation, maintenance, has good Economy and stability.This apparatus structure is simple, highly versatile, adopts low pressure shaft end gland seal precision on adjusting of this device higher, and more accurate with the large axial adjustment centering of rotor, shaft end gland seal sealing effect is better.
Brief description of the drawings
Fig. 1 is low pressure shaft end gland seal three points centering regulating device of the present invention and low pressure axle head labyrinth casing schematic diagram;
Fig. 2 is low pressure shaft end gland seal three points centering regulating device of the present invention and low pressure axle head labyrinth casing assembling sectional arrangement drawing;
Fig. 3 is low pressure shaft end gland seal three points centering regulating device of the present invention and low pressure axle head labyrinth casing assembling plan view;
Fig. 4 is low pressure shaft end gland seal three points centering regulating device adjustment amount schematic diagram of the present invention;
Fig. 5 is low pressure shaft end gland seal three points centering of the present invention regulating device adjustment and measuring point schematic diagram;
Wherein 1, substantially horizontal adjusting nut, 2, substantially horizontal is adjusted bolt, 3, vertical direction adjusting nut, 4, vertical direction adjusts bolt, 5, low pressure axle head labyrinth casing, 6, support block, 7, low pressure shaft end gland seal fixing bolt, 8, steam discharge cone, 9, low pressure axle head gland sealing gear sheet, 10, turbine rotor macro-axis, 11, labyrinth ring.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is low pressure shaft end gland seal three points centering regulating device of the present invention and low pressure axle head labyrinth casing schematic diagram.Steam turbine low-pressure axle head labyrinth casing 5 second vertical surface flanges each side have a substantially horizontal adjustment bolt 2 to be connected by screw thread with low pressure axle head labyrinth casing 5 near horizontal flange place, low pressure axle head labyrinth casing 5 bottoms also have a vertical direction adjustment bolt 4 to be connected by screw thread with low pressure axle head labyrinth casing 5, form three points centering structure.Substantially horizontal is adjusted on bolt 2 and is rotary with the substantially horizontal adjusting nut 1 being mated, and vertical direction is adjusted on bolt 4 and is rotary with vertical direction adjusting nut 3.
Fig. 2 is to be low pressure shaft end gland seal three points centering regulating device of the present invention and low pressure axle head labyrinth casing assembling sectional arrangement drawing.In low pressure (LP) cylinder, have a support block 6 to be welded on low pressure (LP) cylinder inwall, the adjustment nut that low pressure axle head labyrinth casing 5 bottom vertical directions are adjusted bolt 4 contacts with low pressure (LP) cylinder support block 6, forms Vertical direction location.
Fig. 3 is to be low pressure shaft end gland seal three points centering regulating device of the present invention and low pressure axle head labyrinth casing assembling plan view.Left end is turbine end, and right-hand member is generator end.Low pressure axle head labyrinth casing vertical surface flange each side has a substantially horizontal to adjust bolt 2 and substantially horizontal adjusting nut 1, the nut that centering adjustment finishes to adjust bolt in rear left and right all contacts with steam discharge cone 8 internal faces of after the bearing box, adjusts bolt 4 form three points centering structure with the vertical direction of low pressure axle head labyrinth casing bottom.
Fig. 4 is low pressure shaft end gland seal three points centering regulating device adjustment amount schematic diagram of the present invention.This adjustment amount c is the radial clearance of low pressure axle head gland sealing gear sheet 9 and turbine rotor macro-axis 10, gap c after adjustment completes between low pressure axle head gland sealing gear sheet 9 and turbine shaft in a circumferential direction each point all reaches design and operation requirement, then fastening low pressure shaft end gland seal fixing bolt 7 is fixed low pressure axle head labyrinth casing 5 and low pressure (LP) cylinder, completes the installment work of low pressure axle head labyrinth casing.
Fig. 5 is low pressure shaft end gland seal three points centering regulating device distributed points schematic diagram of the present invention.The direction of arrow is rotor sense of rotation.It is C, F and 3 formations of I in Fig. 5 that bolt and nut is adjusted in three points centering position, and emphasis is adjusted the gap that C, F, I and L are ordered.Utilize nut control bolt jack-up length, adjust the low pressure axle head gland sealing gear sheet 9 of shaft end gland seal ring 11 and the gap c of turbine rotor macro-axis 10.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technological scheme of the present invention, those skilled in the art do not need to pay various amendments that creative work can make or distortion still in protection scope of the present invention.
Claims (1)
1. a three-point centring adjustment device for low-pressure shaft end steam seal of steam turbine, it is characterized in that, at second vertical surface flange of low pressure axle head labyrinth casing near the horizontal flange left and right sides, and the bottom of low pressure axle head labyrinth casing is respectively equipped with one and adjusts bolt and one and be spun on the adjusting nut of adjusting on bolt, described three screw bolt and nut form three points centering structure jointly; The adjustment bolt of the described low pressure axle head labyrinth casing left and right sides and adjusting nut substantially horizontal arrange; Adjustment bolt and the adjusting nut vertical direction of described low pressure axle head labyrinth casing bottom arrange; Described adjustment bolt and low pressure axle head labyrinth casing are threaded connection; Utilize nut control bolt jack-up length, adjust the low pressure axle head gland sealing gear sheet of shaft end gland seal ring and the gap of turbine rotor macro-axis, the adjustment nut that centering adjustment is finished the adjustment bolt of rear left and right side setting all contacts with the low pressure (LP) cylinder steam discharge cone internal face of after the bearing box, and the adjustment nut that bottom is adjusted on bolt contacts with low pressure (LP) cylinder support block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210072441.3A CN102588008B (en) | 2012-03-19 | 2012-03-19 | Three-point centring adjustment device for low-pressure shaft end steam seal of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210072441.3A CN102588008B (en) | 2012-03-19 | 2012-03-19 | Three-point centring adjustment device for low-pressure shaft end steam seal of steam turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102588008A CN102588008A (en) | 2012-07-18 |
| CN102588008B true CN102588008B (en) | 2014-12-10 |
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| CN201210072441.3A Active CN102588008B (en) | 2012-03-19 | 2012-03-19 | Three-point centring adjustment device for low-pressure shaft end steam seal of steam turbine |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4261586A (en) * | 1979-07-18 | 1981-04-14 | Sando Iron Works Co., Ltd. | Automatic pressure control device of a side seal plate in a seal mechanism of a high pressure steamer |
| JPH0979003A (en) * | 1995-09-13 | 1997-03-25 | Mitsubishi Heavy Ind Ltd | Gland main body installing structure of turbine chamber |
| EP0893578A1 (en) * | 1997-07-21 | 1999-01-27 | Gec Alsthom Electromecanique Sa | Sealed connecting device between the steam supply pipe and the internal body of the low-pressure stage of a steam turbine |
| JP2003013704A (en) * | 2001-06-27 | 2003-01-15 | Fuji Electric Co Ltd | Steam turbine |
| CN2886084Y (en) * | 2005-12-29 | 2007-04-04 | 东方汽轮机厂 | Sealing structure of steam turbine stator part and sealing gland thereof |
| CN201399889Y (en) * | 2009-04-29 | 2010-02-10 | 浙江双林塑料机械有限公司 | Semi-round support plate rounding machine of plastic tube vacuum cooling box |
| CN202493298U (en) * | 2012-03-19 | 2012-10-17 | 山东齐鲁电机制造有限公司 | Three-point centering adjusting device of turbine low-pressure shaft end vapor seal |
-
2012
- 2012-03-19 CN CN201210072441.3A patent/CN102588008B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4261586A (en) * | 1979-07-18 | 1981-04-14 | Sando Iron Works Co., Ltd. | Automatic pressure control device of a side seal plate in a seal mechanism of a high pressure steamer |
| JPH0979003A (en) * | 1995-09-13 | 1997-03-25 | Mitsubishi Heavy Ind Ltd | Gland main body installing structure of turbine chamber |
| EP0893578A1 (en) * | 1997-07-21 | 1999-01-27 | Gec Alsthom Electromecanique Sa | Sealed connecting device between the steam supply pipe and the internal body of the low-pressure stage of a steam turbine |
| JP2003013704A (en) * | 2001-06-27 | 2003-01-15 | Fuji Electric Co Ltd | Steam turbine |
| CN2886084Y (en) * | 2005-12-29 | 2007-04-04 | 东方汽轮机厂 | Sealing structure of steam turbine stator part and sealing gland thereof |
| CN201399889Y (en) * | 2009-04-29 | 2010-02-10 | 浙江双林塑料机械有限公司 | Semi-round support plate rounding machine of plastic tube vacuum cooling box |
| CN202493298U (en) * | 2012-03-19 | 2012-10-17 | 山东齐鲁电机制造有限公司 | Three-point centering adjusting device of turbine low-pressure shaft end vapor seal |
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| Publication number | Publication date |
|---|---|
| CN102588008A (en) | 2012-07-18 |
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Effective date of registration: 20210118 Address after: 250012 Qilu motor building, No.18 Huaxin Road, Lixia District, Jinan City, Shandong Province Patentee after: SHANDONG QILU ELECTRIC MOTOR MANUFACTURING Co.,Ltd. Address before: 250100 No. 18 Huaxin Road, Lixia District, Shandong, Ji'nan Patentee before: SHANDONG QILU ELECTRIC MOTOR MANUFACTURING Co.,Ltd. Patentee before: SHANDONG JINAN POWER EQUIPMENT FACTORY Co.,Ltd. |