CN102588008A - 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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- CN102588008A CN102588008A CN2012100724413A CN201210072441A CN102588008A CN 102588008 A CN102588008 A CN 102588008A CN 2012100724413 A CN2012100724413 A CN 2012100724413A CN 201210072441 A CN201210072441 A CN 201210072441A CN 102588008 A CN102588008 A CN 102588008A
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- axle head
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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 steam turbine low-pressure axle head packing three points centering regulating device, be specially adapted to the low pressure axle head labyrinth clearance adjustment of large-scale condensing steam turbine.
Background technique
Steam turbine is made up of stator and rotor portion, with the acting working substance steam thermal power transfer be the high speed rotating class power equipment of mechanical energy.Its low-pressure section of large-scale condensing steam turbine is operated in subatmospheric negative pressure state, and it is in order to prevent the leakage of steam/air in sound part gap, the quality of influence acting working medium that steam turbine is provided with the shaft end gland seal structure.
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 mode of structure is installed generation off-centre because of the bolt deviations causes the low pressure shaft end gland seal easily; 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 the 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, influence the quality of working medium simultaneously.
Summary of the invention
The objective of the invention is for overcoming the deficiency of above-mentioned existing technology; A kind of steam turbine low-pressure axle head packing three points centering regulating device is provided; This apparatus structure is simple, highly versatile; It is higher to adopt the low pressure shaft end gland seal of this device in installation process, to adjust precision, and more accurate with the big axial adjustment centering of rotor, the shaft end gland seal sealing effect is better.
For realizing above-mentioned purpose, the present invention adopts following technical proposals:
A kind of steam turbine low-pressure axle head packing three points centering regulating device; 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 adjustment bolt and one and is spun on the adjustment nut on the adjustment bolt, and said three screw bolt and nut constitute the three points centering structure jointly.
The adjustment bolt of the said low pressure axle head labyrinth casing left and right sides is provided with adjustment nut substantially horizontal.
The adjustment bolt of said low pressure axle head labyrinth casing bottom is provided with adjustment nut vertical direction.
Said adjustment bolt and low pressure axle head labyrinth casing be through being threaded, and the adjustment nut that the centering adjustment finishes the adjustment bolt that the back left and right side is provided with all contacts with low pressure (LP) cylinder steam discharge cone internal face, and the adjustment nut that the bottom is adjusted on the bolt contacts with the low pressure (LP) cylinder support block.
The shaft end gland seal centering regulating device of the present invention through respectively adopting an adjustment bolt and adjustment nut to constitute near the bottom of 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; The adjustment bolt is connected through screw thread with low pressure axle head labyrinth casing; The nut that the centering adjustment finishes adjustment bolt about the back contacts with low pressure (LP) cylinder steam discharge cone internal face, and bottom adjustment bolt nut contacts with the low pressure (LP) cylinder support block.
Through measuring the gap of shaft end gland seal labyrinth ring gear piece and rotor macro-axis,, adjust the adjustment nut counterrotating on the bolt to the shaft end gland seal adjustment of feeling relieved; Adjustment bolt and low pressure axle head labyrinth casing screw-thread fit, form three points centering adjustment mode, help adjusting fast low pressure shaft end gland seal and labyrinth ring and assemble; Make it concentric, keep the gap of sound part, reach the design and operation requirement with the turbine rotor macro-axis; Reduce the mill that bumps of low pressure axle head gland sealing gear sheet and turbine rotor macro-axis; Improve the work of low pressure shaft end gland seal, reduce the steam/air amount of leakage, improve steam turbine operation efficient.
The present invention can satisfy the steam turbine operation usage requirement through analyses such as actual adjustment assembling and runnabilitys, has enough adjustment precision, and is simple in structure, is convenient to operations such as processing, installation, maintenance, has good and economic and stability.This apparatus structure is simple, highly versatile, adopts low pressure shaft end gland seal precision in adjustment of this device higher, and more accurate with the big axial adjustment centering of rotor, the shaft end gland seal sealing effect is better.
Description of 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 representation;
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 a low pressure shaft end gland seal three points centering regulating device adjustment amount schematic representation of the present invention;
Fig. 5 is low pressure shaft end gland seal three points centering regulating device adjustment of the present invention and measuring point schematic representation;
Wherein 1, substantially horizontal adjustment nut, 2, substantially horizontal adjustment bolt, 3, vertical direction adjustment nut; 4, vertical direction adjustment bolt, 5, low pressure axle head labyrinth casing, 6, support block; 7, low pressure shaft end gland seal fixing bolt, 8, the 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 accompanying drawing and embodiment the present invention is further specified.
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 representation.Steam turbine low-pressure axle head labyrinth casing 5 second vertical surface flanges each side have substantially horizontal adjustment bolt 2 and low pressure axle head labyrinth casing 5 to be connected through screw thread near the horizontal flange place; Low pressure axle head labyrinth casing 5 bottoms also have vertical direction adjustment bolt 4 and low pressure axle head labyrinth casing 5 to be connected formation three points centering structure through screw thread.Be rotary with the substantially horizontal adjustment nut 1 that is mated on the substantially horizontal adjustment bolt 2, be rotary with vertical direction adjustment nut 3 on the vertical direction adjustment bolt 4.
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.Have a support block 6 to be welded on the low pressure (LP) cylinder inwall in the low pressure (LP) cylinder, the adjustment nut of low pressure axle head labyrinth casing 5 bottom vertical direction adjustment bolts 4 contacts with low pressure (LP) cylinder support block 6, constitutes the Vertical direction location.
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.Left end is a turbine end, and right-hand member is a generator end.Low pressure axle head labyrinth casing vertical surface flange each side has a substantially horizontal adjustment bolt 2 and substantially horizontal adjustment nut 1; The nut of adjustment bolt all contacts with steam discharge cone 8 internal faces of after the bearing box about centering adjustment end back, with the vertical direction adjustment bolt 4 formation three points centering structures of low pressure axle head labyrinth casing bottom.
Fig. 4 is a low pressure shaft end gland seal three points centering regulating device adjustment amount schematic representation 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 is accomplished between low pressure axle head gland sealing gear sheet 9 and turbine shaft each point in a circumferential direction all reaches the design and operation requirement; Fastening then low pressure shaft end gland seal fixing bolt 7 is fixed low pressure axle head labyrinth casing 5 and low pressure (LP) cylinder, accomplishes the installment work of low pressure axle head labyrinth casing.
Fig. 5 is a low pressure shaft end gland seal three points centering regulating device distributed points schematic representation of the present invention.The direction of arrow is the rotor rotation direction.Three points centering position adjustment bolt and nut is C among Fig. 5, F and 3 formations of I, the gap that emphasis adjustment C, F, I and L are ordered.Utilize nut control bolt jack-up length, the low pressure axle head gland sealing gear sheet 9 of adjustment shaft end gland seal ring 11 and the gap c of turbine rotor macro-axis 10.
Though the above-mentioned accompanying drawing specific embodiments of the invention that combines is described; But be not restriction to protection domain of the present 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 need not pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (4)
1. steam turbine low-pressure axle head packing three points centering regulating device; 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 adjustment bolt and one and is spun on the adjustment nut on the adjustment bolt, and said three screw bolt and nut constitute the three points centering structure jointly.
2. steam turbine low-pressure axle head packing three points centering regulating device as claimed in claim 1 is characterized in that, the adjustment bolt of the said low pressure axle head labyrinth casing left and right sides is provided with adjustment nut substantially horizontal.
3. steam turbine low-pressure axle head packing three points centering regulating device as claimed in claim 1 is characterized in that, the adjustment bolt of said low pressure axle head labyrinth casing bottom is provided with adjustment nut vertical direction.
4. steam turbine low-pressure axle head packing three points centering regulating device as claimed in claim 1; It is characterized in that; Said adjustment bolt and low pressure axle head labyrinth casing are through being threaded; The adjustment nut that the centering adjustment finishes the adjustment bolt of back left and right side setting all contacts with low pressure (LP) cylinder steam discharge cone internal face, and the adjustment nut on the bottom adjustment bolt contacts with the 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 true CN102588008A (en) | 2012-07-18 |
| CN102588008B CN102588008B (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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 |
|---|---|
| CN102588008B (en) | 2014-12-10 |
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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. |