CN105971675A - Adjustment method for preventing axial displacement of steam turbine - Google Patents
Adjustment method for preventing axial displacement of steam turbine Download PDFInfo
- Publication number
- CN105971675A CN105971675A CN201610473436.1A CN201610473436A CN105971675A CN 105971675 A CN105971675 A CN 105971675A CN 201610473436 A CN201610473436 A CN 201610473436A CN 105971675 A CN105971675 A CN 105971675A
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- CN
- China
- Prior art keywords
- rotor
- feed pump
- steam turbine
- thrust
- turbine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/08—Adaptations for driving, or combinations with, pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/60—Assembly methods
Abstract
The invention relates to an adjustment method for preventing axial displacement of a steam turbine to solve the problems that in the modified operation process of the steam turbine, instead of a motor, driving a water feed pump, the axial displacement varies greatly every time the steam turbine starts up and stops, a rotor of the water feed pump is driven to drift, a mechanical seal leaks due to friction, and stable operation of the unit is severely affected. A thrust disc of the rotor of the steam turbine is pushed to a thrust pad work face; a rotor of the steam turbine moves toward the rotor side of the water feed pump by 0.35-0.45 mm; the rotor of the water feed pump moves toward the rotor side of the steam turbine by 0.96-1.0 mm; a coupler and the face, opposite to wheels, of the rotor of the steam turbine are turned by 1.2-1.6 mm; it is guaranteed that the thrust clearance between the rotor of the steam turbine and the coupler is 0.54-0.56 mm; and it is ensured that the thrust clearance between the coupler and the water feed pump is 0.06-0.08 mm. The adjustment method for preventing axial displacement of the steam turbine is used for the operation process where the steam turbine, instead of the motor, drives the water feed pump in a power plant.
Description
Technical field
The present invention relates to a kind of method of adjustment preventing axial float, be specifically related to a kind of adjustment preventing steam turbine axial float
Method, belongs to steam turbine mounting technology field.
Background technology
At present, the steam turbine in power plant replaces motor drag feed pump transformation project, and steam turbine drags in feed pump running
After feed pump startup, axial displacement is at about-0.60mm.Axially displacement increases to suddenly-0.69mm, fore bearing bearing bush temperature, returns
Oil temperature all rises about 20 DEG C.Starting electrically driven feed pump standby, the observation each bearing temperature of feed pump, vibration the most substantially become
Changing, axial displacement maintains about-0.70mm.Axially displacement is increased to suddenly-0.70mm by-0.60mm, according to thermal technology's electricity
The range measurement principle of eddy current probe, little machine rotor relative cylinder moves 0.10mm to heading.
Before checking watt and thrust bearing shoe valve, finding that the non-working surface of thrust bearing shoe valve touches mill, surface has the broken foam of coal to mill layer.Through understanding,
When small turbine is installed, little to the gap between wheel due to diaphragm coupling and small turbine and pump, turning small turbine
Son prizes to heading, and pump rotor prizes to side, causes whole axle system position to change, and thrust disc is non-with thrust bearing shoe valve
Work surface contacts, and pump side thrust disc disengages with thrust bearing shoe valve, and original " 0 " position offsets.Put into operation so far, repeatedly open
Stopping, when stopping, turbine rotor loses the thrust to pump side every time, can be by a reverse power so that turbine rotor
Moving to heading, thrust bearing shoe valve work surface becomes larger with thrust disc gap, touches mill between thrust bearing shoe valve non-working surface and thrust disc
Gradually aggravating, axial displacement negative value increases (being slowly increased to-0.71mm by-0.49mm during initial operation).When touching mill aggravation
Time, axial displacement uprushes, and front bearing shell is integrated with non-working surface, and non-working surface does not has temperature point, cause front bearing bush temperature,
Returning-oil temperature rises.Owing to whole axle system moves to heading, the side mechanical seal of pump waist is caused to be sewed.
To sum up, having problems is: 1, each start and stop of small turbine, easily occurs axial displacement variation big, drives feed pump rotor
Vibration, mechanical seal friction is sewed；2, the axial displacement of run duration small turbine is big, close to protection value, has a strong impact on unit
Stable operation.
Summary of the invention
The present invention is for solving in steam turbine replacement motor drag feed pump transformation running, each start and stop of steam turbine, axially
Displacement variation is big, drives feed pump rotor shifting, and mechanical seal friction is sewed, the problem having a strong impact on stable operation of unit,
And then a kind of method of adjustment preventing steam turbine axial float is provided.
The present invention solves that above-mentioned technical problem adopts the technical scheme that: a kind of method of adjustment preventing steam turbine axial float
Follow the steps below: the thrust disc of turbine rotor is pushed into thrust bearing shoe valve work surface, and turbine rotor is to feed pump
Rotor-side moves 0.35mm-0.45mm, and feed pump rotor is to turbine rotor side shifting 0.96mm-1.0mm, shaft coupling and vapour
The car that turbine wheel is taken turns relatively removes 1.2mm-1.6mm；Ensure that the thrust clearance between turbine rotor and shaft coupling is
0.54mm-0.56mm, it is ensured that the thrust clearance between shaft coupling and feed pump is 0.06mm-0.08mm.
The present invention compared with prior art has the effect that to analyze and produces when the big reason of axial displacement play is to install not
In view of influencing each other of turbine rotor and feed pump rotor shifting.By analysing in depth the big Producing reason of axial displacement,
Formulate Adjusted Option, successfully eliminated steam turbine start and stop to when and the big hidden danger of the axial change in displacement of run duration after enforcement,
After readjusting, the thrust disc of turbine rotor and feed pump rotor is made all to work general work at thrust bearing shoe valve, in operation
With can ensure during start and stop that whole axial displacement does not occur play, it is ensured that stable operation of unit, it is to avoid because play causes machinery
Sealing wear is revealed, and decreases the generation (often set mechanical seal is about 13600 yuan) of renewal cost.Utilize the present invention's
Method of adjustment re-secure to wheel turbine rotor and feed pump rotor after, the axial displacement of turbine rotor be-0.08mm extremely
-0.1mm, is initially-0.12mm to-0.14mm, maintains-0.04 to-0.06mm at present after startup.
Accompanying drawing explanation
Fig. 1 is turbine rotor, shaft coupling and feed pump rotor connection structure schematic diagram.
Detailed description of the invention
Detailed description of the invention one: combine Fig. 1 and illustrate, a kind of method of adjustment preventing steam turbine axial float of present embodiment,
The thrust disc 2-1 of turbine rotor 2 is pushed into thrust bearing shoe valve work surface 1, and turbine rotor 2 is to feed pump rotor 4 side shifting
0.35mm-0.45mm, feed pump rotor 4 turns with steam turbine to turbine rotor 2 side shifting 0.96mm-1.0mm, shaft coupling 3
One car of son 2 wheel relatively removes 1.2mm-1.6mm；Ensure that the thrust clearance between turbine rotor 2 and shaft coupling 3 is
0.54mm-0.56mm, it is ensured that the thrust clearance between shaft coupling 3 and feed pump 4 is 0.06mm-0.08mm.
After the method for adjustment of present embodiment re-secures wheel turbine rotor and feed pump rotor, the axial position of turbine rotor
Moving is-0.08mm to-0.1mm, is initially-0.12mm to-0.14mm, maintains-0.04 to-0.06mm at present after startup.
Efficiently avoid at present axially displacement and increased to suddenly the play that the change of-0.70mm is big by-0.60mm, it is ensured that unit
Stable operation.Shaft coupling 3 car taking turns relative with turbine rotor 2 removes 1.2mm-1.6mm refers to shaft coupling 3 and vapour
One car of turbine wheel 2 phase docking removes 1.2mm-1.6mm.
Present embodiment Adjusted Option, the thrust disc 2-1 of turbine rotor 2 is pushed into thrust bearing shoe valve work surface 1 and works, thrust bearing shoe valve
Work surface 1 contacts friction with thrust disc 2-1 or gap is the least, and the back pressure dish 2-2 of turbine rotor 2 is non-with thrust bearing shoe valve
Work surface 1-2 does not touch mill, and back pressure dish 2-2 is not in contact with thrust bearing shoe valve non-working surface 1-2, pushing away of feed pump rotor 4
Power dish 4-1 does not touches mill with thrust bearing shoe valve non-working surface, is not result in that whole axle system position changes, and axial displacement negative value reduces
(being initially-0.12mm to-0.14mm after startup, maintain-0.04 to-0.06mm at present).The pusher of turbine rotor 2
The non-working surface 1-2 of power dish 2-2 and thrust bearing shoe valve touch mill apparently without, front bearing bush temperature, returning-oil temperature decline.Due to whole
Axle system not play, the side mechanical seal of pump waist is not sewed.
The steam turbine of present embodiment uses model to be N3-1.5 type 3MW condensing-type small steam turbine.The supporting feed pump of unit is
The 4DG-9C type feed pump that Shenyang Water Pump Factory produces.
Detailed description of the invention two: combining Fig. 1 explanation, the thrust disc 2-1 of turbine rotor 2 is pushed into thrust by present embodiment
Watt work surface 1, turbine rotor 2 is to feed pump rotor 4 side shifting 0.4mm, and feed pump rotor 4 is to turbine rotor 2 side
Mobile 0.98mm, shaft coupling 3 car taking turns relative with turbine rotor 2 removes 1.4mm；Ensure turbine rotor 2 and connection
Thrust clearance between axial organ 3 is 0.55mm, it is ensured that the thrust clearance between shaft coupling 3 and feed pump 4 is 0.07mm.
After the method for adjustment of present embodiment re-secures wheel turbine rotor and feed pump rotor, the axial position of turbine rotor
Moving is-0.09mm, is initially-0.13mm, maintains-0.05mm at present after startup.Efficiently avoid at present axially displacement by
-0.60mm increases to suddenly the big play of change of-0.70mm, it is ensured that the stable operation of unit.
Detailed description of the invention three: combining Fig. 1 explanation, the thrust disc 2-1 of turbine rotor 2 is pushed into thrust by present embodiment
Watt work surface 1, turbine rotor 2 is to feed pump rotor 4 side shifting 0.35mm, and feed pump rotor 4 is to turbine rotor 2
Side shifting 0.96mm, shaft coupling 3 car taking turns relative with turbine rotor 2 removes 1.2mm；Ensure turbine rotor 2 with
Thrust clearance between shaft coupling 3 is 0.54mm, it is ensured that the thrust clearance between shaft coupling 3 and feed pump 4 is 0.06mm.
After the method for adjustment of present embodiment re-secures wheel turbine rotor and feed pump rotor, the axial position of turbine rotor
Moving is-0.08mm, is initially-0.12mm, maintains-0.04mm at present after startup.Efficiently avoid at present axially displacement by
-0.60mm increases to suddenly the big play of change of-0.70mm, it is ensured that the stable operation of unit.
Detailed description of the invention four: combining Fig. 1 explanation, the thrust disc 2-1 of turbine rotor 2 is pushed into thrust by present embodiment
Watt work surface 1, turbine rotor 2 is to feed pump rotor 4 side shifting 0.45mm, and feed pump rotor 4 is to turbine rotor 2
Side shifting 1.0mm；Shaft coupling 3 car taking turns relative with turbine rotor 2 removes 1.6mm；Ensure turbine rotor 2 and connection
Thrust clearance between axial organ 3 is 0.56mm, it is ensured that the thrust clearance between shaft coupling 3 and feed pump 4 is 0.08mm.This
After the method for adjustment of embodiment re-secures wheel turbine rotor and feed pump rotor, the axial displacement of turbine rotor is
-0.1mm, is initially-0.14mm, maintains-0.06mm at present after startup.Efficiently avoid the most axially displacement by-0.60mm
Suddenly the play that the change of-0.70mm is big is increased to, it is ensured that the stable operation of unit.
Claims (4)
1. the method for adjustment preventing steam turbine axial float, it is characterised in that: by the thrust disc (2-1) of turbine rotor (2)
Being pushed into thrust bearing shoe valve work surface (1), turbine rotor (2) is to feed pump rotor (4) side shifting 0.35mm-0.45mm, feedwater
Pump rotor (4) is to turbine rotor (2) side shifting 0.96mm-1.0mm, and shaft coupling (3) is relative with turbine rotor (2)
One car of wheel removes 1.2mm-1.6mm；Ensure that the thrust clearance between turbine rotor (2) and shaft coupling (3) is
0.54mm-0.56mm, it is ensured that the thrust clearance between shaft coupling (3) and feed pump (4) is 0.06mm-0.08mm.
A kind of method of adjustment preventing steam turbine axial float the most according to claim 1, it is characterised in that: by steam turbine
The thrust disc (2-1) of rotor (2) is pushed into thrust bearing shoe valve work surface (1), and turbine rotor (2) is to feed pump rotor (4) side
Mobile 0.4mm, feed pump rotor (4) is to turbine rotor (2) side shifting 0.98mm, shaft coupling (3) and turbine rotor
(2) car relatively taken turns removes 1.4mm；Ensure that the thrust clearance between turbine rotor (2) and shaft coupling (3) is 0.55mm,
Ensure that the thrust clearance between shaft coupling (3) and feed pump (4) is 0.07mm.
A kind of method of adjustment preventing steam turbine axial float the most according to claim 1, it is characterised in that: by steam turbine
The thrust disc (2-1) of rotor (2) is pushed into thrust bearing shoe valve work surface (1), and turbine rotor (2) is to feed pump rotor (4) side
Mobile 0.35mm, feed pump rotor (4) turns with steam turbine to turbine rotor (2) side shifting 0.96mm, shaft coupling (3)
One car of son (2) wheel relatively removes 1.2mm；Ensure that the thrust clearance between turbine rotor (2) and shaft coupling (3) is 0.54mm,
Ensure that the thrust clearance between shaft coupling (3) and feed pump (4) is 0.06mm.
A kind of method of adjustment preventing steam turbine axial float the most according to claim 1, it is characterised in that: by steam turbine
The thrust disc (2-1) of rotor (2) is pushed into thrust bearing shoe valve work surface (1), and turbine rotor (2) is to feed pump rotor (4) side
Mobile 0.45mm, feed pump rotor (4) is to turbine rotor (2) side shifting 1.0mm, shaft coupling (3) and turbine rotor
(2) car relatively taken turns removes 1.6mm；Ensure that the thrust clearance between turbine rotor (2) and shaft coupling (3) is 0.56mm,
Ensure that the thrust clearance between shaft coupling (3) and feed pump (4) is 0.08mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610473436.1A CN105971675A (en) | 2016-06-24 | 2016-06-24 | Adjustment method for preventing axial displacement of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610473436.1A CN105971675A (en) | 2016-06-24 | 2016-06-24 | Adjustment method for preventing axial displacement of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105971675A true CN105971675A (en) | 2016-09-28 |
Family
ID=57020106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610473436.1A Pending CN105971675A (en) | 2016-06-24 | 2016-06-24 | Adjustment method for preventing axial displacement of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105971675A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284738A (en) * | 2020-09-10 | 2021-01-29 | 福建福清核电有限公司 | Axial displacement measurement and zero point calibration method for nuclear power steam turbine unit |
| CN112377449A (en) * | 2020-11-13 | 2021-02-19 | 大唐石门发电有限责任公司 | Auxiliary device for centering water feed pump of small steam turbine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200964875Y (en) * | 2006-10-24 | 2007-10-24 | 中国铝业股份有限公司 | Device for preventing steam turbine main oil pump bush-burning |
| CN201420572Y (en) * | 2009-06-12 | 2010-03-10 | 中国电力工程顾问集团东北电力设计院 | Steam turbine generator unit of coaxial drive feed water pump |
| CN204312147U (en) * | 2014-12-08 | 2015-05-06 | 北京电力设备总厂有限公司 | Turning for Feed Pump Turbine device |
| CN105651140A (en) * | 2016-01-04 | 2016-06-08 | 山东电力建设第工程公司 | Coupling alignment scheme for rabbet-matched single-fulcrum shafting steam turbines |
-
2016
- 2016-06-24 CN CN201610473436.1A patent/CN105971675A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200964875Y (en) * | 2006-10-24 | 2007-10-24 | 中国铝业股份有限公司 | Device for preventing steam turbine main oil pump bush-burning |
| CN201420572Y (en) * | 2009-06-12 | 2010-03-10 | 中国电力工程顾问集团东北电力设计院 | Steam turbine generator unit of coaxial drive feed water pump |
| CN204312147U (en) * | 2014-12-08 | 2015-05-06 | 北京电力设备总厂有限公司 | Turning for Feed Pump Turbine device |
| CN105651140A (en) * | 2016-01-04 | 2016-06-08 | 山东电力建设第工程公司 | Coupling alignment scheme for rabbet-matched single-fulcrum shafting steam turbines |
Non-Patent Citations (1)
| Title |
|---|
| 褚思全: "小汽轮机轴向位移增大的原因分析与处理", 《汽轮机技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284738A (en) * | 2020-09-10 | 2021-01-29 | 福建福清核电有限公司 | Axial displacement measurement and zero point calibration method for nuclear power steam turbine unit |
| CN112377449A (en) * | 2020-11-13 | 2021-02-19 | 大唐石门发电有限责任公司 | Auxiliary device for centering water feed pump of small steam turbine |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160928 |
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| WD01 | Invention patent application deemed withdrawn after publication |