CN105973300A - Method of measuring steam turbine governing valve closing time and trajectory curve and steam turbine governing valve device provided with laser ranging sensors - Google Patents
Method of measuring steam turbine governing valve closing time and trajectory curve and steam turbine governing valve device provided with laser ranging sensors Download PDFInfo
- Publication number
- CN105973300A CN105973300A CN201610382800.3A CN201610382800A CN105973300A CN 105973300 A CN105973300 A CN 105973300A CN 201610382800 A CN201610382800 A CN 201610382800A CN 105973300 A CN105973300 A CN 105973300A
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- Prior art keywords
- steam turbine
- valve rod
- laser
- supports
- governing valve
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- 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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
-
- 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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
- F01D17/22—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical
- F01D17/26—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical fluid, e.g. hydraulic
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a method of measuring steam turbine governing valve closing time and trajectory curve and a steam turbine governing valve device provided with laser ranging sensors, and relates to a steam turbine. The object of the invention is to solve the problems, which can jeopardize safety operation of a steam turbine set during measuring the closing time and the trajectory curve of the steam turbine governing valve, and the problems are error connection or virtual connection during repeated disconnecting or repeated connecting operation of technicians. Every valve base housing is provided with a laser ranging sensor, and direction of emitted laser is parallel to valve rods, and the laser is constantly and directly irradiated on a same position of a second support during the moving of the steam turbine governing valve. The signals of the laser ranging sensors are transmitted to a signal input end of an input unit of a high speed acquisition oscillograph system, and the recording of the steam turbine governing valve closing time and the rendering of the moving trajectory curve are completed in the high speed acquisition oscillograph system. By adopting the method provided by the invention, repeated connecting and disconnecting of signal output lines of LVDT are not required. The method provided by the invention is suitable for the steam turbine control field, and is especially suitable for the steam turbine governing valve closing time and trajectory curve measurement.
Description
Technical field
The present invention relates to a kind of method measuring steam turbine pitch exercise data and be provided with the steam turbine tune of laser range sensor
Door gear, is specifically related to measure steam turbine pitch and closes duration and the method for geometric locus and be provided with the vapour of laser range sensor
Turbine pitch device.It is applied to steam turbine technology field.
Background technology
At present, steam turbine pitch is controlled by DEH (digital electrohydraulic control system), and its operation principle is: by the control of DEH
Unit starting servomotor, by the piston driving valve rod of described servomotor；The piston of the affixed servomotor in one end of described valve rod, separately
The spool of the affixed valve in one end；Described servomotor and valve rod are respectively equipped with differential transformer displacement transducer support, poor
Dynamic transformer type position sensor support is provided with two LVDT (differential transformer displacement transducer), and described LVDT uses
In measuring the displacement of steam turbine pitch and feeding back to the control unit of DEH, it is achieved that steam turbine pitch is precisely controlled by DEH.
LVDT belongs to linear displacement transducer.Its operation principle is briefly the movable transformator of iron core, and it is by a primary
The parts compositions such as coil, two secondary coils, rod core, coil rack and shell.Primary coil and secondary coil distribution
On coil rack, coil inside is provided with a rod core that can move freely.When iron core is in an intermediate position, two
The induction electromotive force that secondary coil produces is equal, and such output voltage is zero；When iron core portion in coil moves and off-center
During position, the induction electromotive force that two coils produce, there is voltage to export, its voltage swing depends on the size of displacement.
In order to improve the sensitivity of sensor, improve the linearity of sensor, increase the range of linearity of sensor, by two during design
Coil play a reversed role connect, the polarity of voltage of two secondary coils contrary, the voltage of LVDT output is the voltage of two secondary coils
Difference, this output magnitude of voltage linear with the displacement of iron core.
Steam turbine pitch closes duration and geometric locus needs to measure in the case of following three kinds: before 1, steam turbine is dispatched from the factory；
2, before newly-built steam-turbine unit starts or after steam-turbine unit overhaul；3, steam-turbine unit load carrying needs removal of load
Time.
The closedown duration of steam turbine pitch and the measurement of geometric locus, need first by the control unit being already connected to DEH
The output line of LVDT disconnects, then the output line of LVDT is connected to the signal input part of high speed acquisition record wave system system
And in high speed acquisition record wave system system, carry out closedown duration and the measurement of geometric locus of steam turbine pitch；Steam turbine to be done is adjusted
After the measurement closing duration and geometric locus of door, the output line of LVDT is defeated from the signal of high speed acquisition record wave system system
Enter end to disconnect, the output line of LVDT is connected to the signal input part of the control unit of DEH.The horizontal seat of geometric locus
Be designated as the time, vertical coordinate is steam turbine pitch displacement.
In sum, the measurement implementing to close steam turbine pitch duration and geometric locus needs LVDT to be repeated in a large number
Take out stitches and wiring work, once there is misconnection or virtual connection, the safe operation of steam-turbine unit will be brought huge harm.
Summary of the invention
The invention aims to need by technology when the closedown duration and the geometric locus that solve to measure existing steam turbine pitch
Workman carries out substantial amounts of dismounting and patching operations to the cable of LDVT repeatedly, easily misconnection or virtual connection occurs thus jeopardizes steam turbine
The problem of unit safety operation, and then propose a kind of steam turbine pitch of measuring and close duration and the method for geometric locus and be provided with sharp
The steam turbine pitch device of ligh-ranging sensor.
The present invention provides a kind of steam turbine pitch of measuring to close duration and the method for geometric locus, concretely comprises the following steps:
Step one, on valve seat 5 shell of each steam turbine pitch fixed laser distance measuring sensor 6, make described Laser Measuring
The direction launching laser away from sensor 6 is parallel with valve rod 3, and described laser begins in the range of movement of described steam turbine pitch
The same position of whole No. two support 1-4 of direct projection；Described No. two support 1-4 are fixedly connected on valve rod 3, described No. two supports
1-4 is one of building block of existing steam turbine pitch, in the motion of steam turbine pitch, the displacement of described valve rod 3 with
The displacement of described steam turbine pitch is identical；
Step 2, the signal output part of described laser range sensor 6 is connected the input block of high speed acquisition record wave system system 2
The signal input part of 2-1；
Step 3, the record completing described steam turbine pitch closedown duration in high speed acquisition records wave system system 2 and steam turbine pitch
The drafting of running orbit curve.
Be provided with the steam turbine pitch device of laser range sensor, including deh control system 1, high speed acquisition record wave system system 2,
Valve rod 3, spool 4 and valve seat 5；Deh control system 1 include control unit 1-1, servomotor 1-2, support 1-3,
No. two support 1-4, a LDVT1-5 and No. two LDVT1-6；Described control unit 1-1 is used for starting described servomotor 1-2；
By valve rod 3 described in the piston driving of described servomotor 1-2；One end of described valve rod 3 connects the piston of described servomotor 1-2,
The other end of described valve rod 3 connects described spool 4；Described spool 4 is for closing or open the passage of described valve seat 5；
One end of a described support 1-3 is fixedly connected on described servomotor 1-2 shell；One end of described No. two support 1-6 is fixed
It is connected to described valve rod 3；A described support 1-3 and No. two support 1-4 is strip；A described support 1-3 and No. two
Support 1-4 is parallel and axis co-planar with described valve rod 3；The shell of a described LDVT1-5 connects a described support 1-3；
The rod core of a described LDVT1-5 connects described No. two support 1-4；The shell of described No. two LDVT1-6 connects described
A number support 1-3；The rod core of described No. two LDVT1-6 connects described No. two support 1-4；A described LDVT1-5,
Described No. two LDVT1-6, described valve rod 3 axis parallel；Described high speed acquisition record wave system system 2 include input block 2-1,
Operating unit 2-2 and display unit 2-3；Described device also includes laser range sensor 6, described laser range sensor 6
Being fixed on the surface of described valve seat 5, the laser direction that described laser range sensor 6 is launched is flat with the axis of described valve rod 3
OK；The laser direct projection that described laser range sensor 6 is launched is on No. two support 1-6；Described laser range sensor 6
Signal output part connects the signal input part of the input block 2-1 of described high speed acquisition record wave system system 2.
The invention has the beneficial effects as follows: owing to the present invention uses technique scheme, make steam turbine pitch close duration and track
Measuring without changing the line of LVDT of curve, has saved and has measured steam turbine pitch and close the 80% of duration and geometric locus
Workload and save 90% operating time, thus reach the purpose of the present invention.
Accompanying drawing explanation
Fig. 1 is the flow chart measuring the method that steam turbine pitch closes duration and geometric locus.
Fig. 2 is the structural representation of the steam turbine pitch device being provided with laser range sensor.
Detailed description of the invention
Detailed description of the invention one: combine Fig. 1 and 2 and present embodiment is described, the measurement steam turbine pitch described in present embodiment
Close duration and the method for geometric locus, concretely comprise the following steps:
Step one, on valve seat 5 shell of each steam turbine pitch fixed laser distance measuring sensor 6, make described Laser Measuring
The direction launching laser away from sensor 6 is parallel with valve rod 3, and described laser begins in the range of movement of described steam turbine pitch
The same position of whole No. two support 1-4 of direct projection；Described No. two support 1-4 are fixedly connected on valve rod 3, described No. two supports
1-4 is one of building block of existing steam turbine pitch, in the motion of steam turbine pitch, the displacement of described valve rod 3 with
The displacement of described steam turbine pitch is identical；
Step 2, the signal output part of described laser range sensor 6 is connected the input block of high speed acquisition record wave system system 2
The signal input part of 2-1；
Step 3, the record completing described steam turbine pitch closedown duration in high speed acquisition records wave system system 2 and steam turbine pitch
The drafting of running orbit curve.
Detailed description of the invention two: combine Fig. 2 and present embodiment is described, is provided with laser range sensor described in present embodiment
Steam turbine pitch device, including deh control system 1, high speed acquisition record wave system system 2, valve rod 3, spool 4 and valve seat 5；
Deh control system 1 includes control unit 1-1, servomotor 1-2, support 1-3, No. two support 1-4, LDVT1-5
With No. two LDVT1-6；Described control unit 1-1 is used for starting described servomotor 1-2；Piston band by described servomotor 1-2
Dynamic described valve rod 3；One end of described valve rod 3 connects the piston of described servomotor 1-2, and the other end of described valve rod 3 connects
Described spool 4；Described spool 4 is for closing or open the passage of described valve seat 5；One end of a described support 1-3
It is fixedly connected on described servomotor 1-2 shell；One end of described No. two support 1-6 is fixedly connected on described valve rod 3；Described
A number support 1-3 and No. two support 1-4 is strip；A described support 1-3 and No. two support 1-4 parallel and with described valve
The axis co-planar of bar 3；The shell of a described LDVT1-5 connects a described support 1-3；A described LDVT1-5's
Rod core connects described No. two support 1-4；The shell of described No. two LDVT1-6 connects a described support 1-3；Described two
The rod core of number LDVT1-6 connects described No. two support 1-4；A described LDVT1-5, described No. two LDVT1-6, institute
The axis stating valve rod 3 is parallel；Described high speed acquisition record wave system system 2 includes input block 2-1, operating unit 2-2 and display
Unit 2-3；Described device also includes that laser range sensor 6, described laser range sensor 6 are fixed on described valve seat 5
Surface, the laser direction that described laser range sensor 6 is launched is parallel with the axis of described valve rod 3；Described laser ranging passes
The laser direct projection that sensor 6 is launched is on No. two support 1-6；The signal output part of described laser range sensor 6 connects described
The signal input part of the input block 2-1 of high speed acquisition record wave system system 2；Described input block 2-1 is used for receiving laser ranging
Signal that sensor 6 sends also powers to laser range sensor 6；When described operating unit 2-2 is used for arranging measurement
Between, mark engineering unit, zero point full scale, storage measurement result and print track curve etc. operation；Display unit 2-3 is used for
Display measurement result.
Detailed description of the invention three: combine Fig. 2 and present embodiment is described, present embodiment is to described in detailed description of the invention two
Device, just the surface to the described No. two support 1-4 of described laser range sensor 6 is plane, and even curface can be right
The reflecting effect of laser is more preferable, has ensured the measurement of described laser range sensor.
Detailed description of the invention four: combine Fig. 2 and illustrate that present embodiment, present embodiment are to detailed description of the invention two or three institute
The device stated, the certainty of measurement of described laser range sensor 6 is 0.01mm, has ensured the precision measured.
Detailed description of the invention five: combine Fig. 2 and present embodiment is described, present embodiment is to described in detailed description of the invention four
Device, a described support 1-3 and No. two support 1-4 are vertical with the axis of described valve rod 3 so that a described support 1-3,
The structure of No. two support 1-4, a LDVT1-5, No. two LDVT1-6, servomotor 1-2 and valve rod 3 composition is more firm.
Detailed description of the invention six: combine Fig. 2 illustrate present embodiment, present embodiment be to detailed description of the invention two, three or
Device described in five, the piston of described servomotor 1-2 is coaxial with described valve rod 3；Described valve rod 3 is coaxial with described spool 4；
This at two coaxial configuration be conducive to the transmission of power and the reliability of connection.
Claims (6)
1. measure steam turbine pitch closedown duration and the method for geometric locus for one kind, it is characterised in that the concrete steps of the method
For:
Step one, on valve seat (5) shell of each steam turbine pitch fixed laser distance measuring sensor (6), make described swash
The direction that laser launched by ligh-ranging sensor (6) is parallel with valve rod (3), and described laser is in the fortune of described steam turbine pitch
The same position of No. two supports (1-4) of direct projection all the time in the range of Dong；Described No. two supports (1-4) are fixedly connected on valve rod (3)
On, described No. two supports (1-4) are one of building block of existing steam turbine pitch, in the motion of steam turbine pitch, institute
The displacement stating valve rod (3) is identical with the displacement of described steam turbine pitch；
Step 2, the defeated of (2) that the signal output part connection high speed acquisition record wave system of described laser range sensor (6) is united
Enter the signal input part of unit (2-1)；
Step 3, the record completing described steam turbine pitch closedown duration in high speed acquisition record wave system system (2) and steam turbine are adjusted
The drafting of door running orbit curve.
2. it is provided with a steam turbine pitch device for laser range sensor, including deh control system (1), high speed acquisition record
Wave system system (2), valve rod (3), spool (4) and valve seat (5)；Deh control system (1) include control unit (1-1),
Servomotor (1-2), a support (1-3), No. two supports (1-4), a LDVT (1-5) and No. two LDVT (1-6)；
Described control unit (1-1) is used for starting described servomotor (1-2)；Described in the piston driving of described servomotor (1-2)
Valve rod (3)；One end of described valve rod (3) connects the piston of described servomotor (1-2), the other end of described valve rod (3)
Connect described spool (4)；Described spool (4) is used for closing or opening the through hole of described valve seat (5)；A described support
(1-3) one end is fixedly connected on described servomotor (1-2) shell；One end of described No. two supports (1-4) is fixing to be connected
In described valve rod (3)；A described support (1-3) and No. two supports (1-4) are strip；A described support (1-3)
And axis co-planar with described valve rod (3) parallel with No. two supports (1-4)；The shell of a described LDVT (1-5) is even
Connect a described support (1-3)；The rod core of a described LDVT (1-5) connects described No. two supports (1-4)；Institute
The shell stating No. two LDVT (1-6) connects a described support (1-3)；The rod core of described No. two LDVT (1-6) is even
Connect described No. two supports (1-4)；A described LDVT (1-5), described No. two LDVT (1-6), described valve rod (3)
Axis is parallel；Described high speed acquisition record wave system system (2) includes that input block (2-1), operating unit (2-2) and display are single
Unit (2-3)；It is characterized in that, described device also includes laser range sensor (6), described laser range sensor (6)
It is fixed on the surface of described valve seat (5), the laser direction that described laser range sensor (6) is launched and described valve rod (3)
Axis parallel；The laser direct projection that described laser range sensor (6) is launched is on No. two supports (1-6)；Described laser
The signal output part of distance measuring sensor (6) connects the signal of the input block (2-1) of described high speed acquisition record wave system system (2)
Input.
Device the most according to claim 2, it is characterised in that just described to described laser range sensor (6)
The surface of No. two supports (1-4) is plane.
4. according to the device described in Claims 2 or 3, it is characterised in that the measurement of described laser range sensor (6)
Precision is 0.01mm.
Device the most according to claim 4, it is characterised in that a described support (1-3) and No. two supports (1-4)
Vertical with the axis of described valve rod (3).
6. according to the device described in claim 2,3 or 5, it is characterised in that the piston of described servomotor (1-2) and institute
State valve rod (3) coaxial；Described valve rod (3) is coaxial with described spool (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610382800.3A CN105973300B (en) | 2016-06-01 | 2016-06-01 | A kind of steam turbine pitch that measures closes the method for duration and geometric locus and the steam turbine pitch device equipped with laser range sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610382800.3A CN105973300B (en) | 2016-06-01 | 2016-06-01 | A kind of steam turbine pitch that measures closes the method for duration and geometric locus and the steam turbine pitch device equipped with laser range sensor |
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| Publication Number | Publication Date |
|---|---|
| CN105973300A true CN105973300A (en) | 2016-09-28 |
| CN105973300B CN105973300B (en) | 2018-04-17 |
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| CN201610382800.3A Active CN105973300B (en) | 2016-06-01 | 2016-06-01 | A kind of steam turbine pitch that measures closes the method for duration and geometric locus and the steam turbine pitch device equipped with laser range sensor |
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| CN205664869U (en) * | 2016-06-01 | 2016-10-26 | 哈尔滨汽轮机厂有限责任公司 | Steam turbine pitch device with laser rangefinder sensor |
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2016
- 2016-06-01 CN CN201610382800.3A patent/CN105973300B/en active Active
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| JP2001033232A (en) * | 1999-07-26 | 2001-02-09 | Toshiba Eng Co Ltd | Graph preparing device and storage medium recording graph preparing program |
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