CN104793009B - Turbine speed pinboard - Google Patents
Turbine speed pinboard Download PDFInfo
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- CN104793009B CN104793009B CN201510125348.8A CN201510125348A CN104793009B CN 104793009 B CN104793009 B CN 104793009B CN 201510125348 A CN201510125348 A CN 201510125348A CN 104793009 B CN104793009 B CN 104793009B
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- normally closed
- closed switch
- frequency electric
- pressure converter
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Abstract
Turbine speed pinboard, belongs to turbine speed field of measuring technique.The present invention is to solve the rotating speed measuring sensor of existing steam turbine by being limited by respective function so that accuracy and reliability are difficult the problem of taking into account.It includes dc source, first frequency electric pressure converter, second frequency electric pressure converter, height and selects circuit, comparison circuit, phase inverter, the first relay and the second relay, two FV convertors receive the rate signal of reluctance type tachogenerator and vortex tachogenerator output respectively, again circuit output higher value is selected through height, after being compared with the voltage threshold of comparison circuit, electric or dead electricity is obtained according to the level signal control relay of comparison circuit using phase inverter, selection exports tach signal all the way.The present invention is used for the tach signal for selecting output tachogenerator to obtain.
Description
Technical field
The present invention relates to turbine speed pinboard, belong to turbine speed field of measuring technique.
Background technology
The measurement of current turbine speed has two ways, and a kind of mode is to use magnetic resistance speed sensor, it excellent
Point is that, without outer power supply source, sensor construction is simple, easy to install, and reliability is high, has the disadvantage to sense just during the slow-speed of revolution
String wave amplitude is small, is easily disturbed, and causes turbine speed measurement inaccurate or can not measure；Another way is to use rotational speed of eddy current
Sensor, its advantage be in 0~3600RPM of rotating speed valid interval of steam turbine can outputting standard tacho-pulse letter
Number, measurement display unit can accurately measure the rotating speed of steam turbine, have the disadvantage to need outer power supply source, and rotational speed of eddy current is sensed
Device it is complicated, reliability wants reluctancy formula speed probe low.
The content of the invention
The invention aims to solve the rotating speed measuring sensor of existing steam turbine by being limited by respective function,
So that accuracy and reliability are difficult that there is provided a kind of turbine speed pinboard the problem of taking into account.
Turbine speed pinboard of the present invention, it includes dc source, first frequency electric pressure converter, second frequency
Electric pressure converter, height select circuit, comparison circuit, phase inverter, the first relay and the second relay,
Dc source is used to provide working power for vortex tachogenerator；
The pulse signal cathode output end of the electrode input end connection vortex tachogenerator of first frequency electric pressure converter,
The pulse signal cathode output end of the negative input connection vortex tachogenerator of first frequency electric pressure converter；
The electrode input end of second frequency electric pressure converter connects the non-constant amplitude sinusoid signal of reluctance type tachogenerator
Cathode output end, the non-constant amplitude sinusoid letter of the negative input connection reluctance type tachogenerator of second frequency electric pressure converter
Number cathode output end；
The voltage signal output end connection height of first frequency electric pressure converter selects the first voltage signal input part of circuit, the
The voltage signal output end connection height of two FV convertors selects the second voltage signal input part of circuit, and height selects the electricity of circuit
Signal output part is pressed to connect the voltage signal inputs of comparison circuit, the voltage signal output end connection phase inverter of comparison circuit
Voltage signal inputs, the level signal output end of phase inverter connects the control signal of the first relay and the second relay simultaneously
Input；
The electrode input end of second frequency electric pressure converter connects the normally closed quiet of first the first normally closed switch of relay JI-1
Contact, the electrode input end of first frequency electric pressure converter connects first the first normally closed switch of relay JI-1 normally opened stationary contact
Point, the cathode output end of first the first normally closed switch of the relay JI-1 selected tach signal of movable contact connection；
First the first normally closed switch of relay JI-1 normally closed stationary contact connects second the first normally closed switch of relay J2-1
Normally closed stationary contact, first the first normally closed switch of relay JI-1 normally opened stationary contact connects second the first normally closed switch of relay
J2-1 normally opened stationary contact, second the first normally closed switch of relay J2-1 movable contact connects first the first normally closed switch of relay
JI-1 movable contact；
The negative input of second frequency electric pressure converter connects the normally closed quiet of first the second normally closed switch of relay JI-2
Contact, the negative input of first frequency electric pressure converter connects first the second normally closed switch of relay JI-2 normally opened stationary contact
Point, the cathode output end of first the second normally closed switch of the relay JI-2 selected tach signal of movable contact connection；
First the second normally closed switch of relay JI-2 normally closed stationary contact connects second the second normally closed switch of relay J2-2
Normally closed stationary contact, first the second normally closed switch of relay JI-2 normally opened stationary contact connects second the second normally closed switch of relay
J2-2 normally opened stationary contact, second the second normally closed switch of relay J2-2 movable contact connects first the second normally closed switch of relay
JI-2 movable contact；
The voltage threshold that comparison circuit is set is Vn, when the high voltage for selecting the voltage signal of circuit output to be more than comparison circuit
During threshold value Vn, comparison circuit output high level, by the relay of inverter controlling first and the second relay electric-loss, now magnetic resistance
The non-constant amplitude sinusoid signal that the measurement of formula tachogenerator is obtained is exported as selected tach signal；
When height selects the voltage signal of circuit output to be less than or equal to the voltage threshold Vn of comparison circuit, comparison circuit is defeated
Go out low level, obtain electric by the relay of inverter controlling first and the second relay, be now vortexed tachogenerator measurement and obtain
Rotational speed pulse signal exported as selected tach signal.
The voltage threshold that comparison circuit is set as turbine speed be 500RPM when corresponding magnitude of voltage.
Advantages of the present invention：The present invention realizes the sensing that tested the speed simultaneously to vortex by the design of change-over panel internal circuit
The reception of device and reluctance type tachogenerator measurement signal, meanwhile, change-over panel always according to the respective advantage of two types sensor,
Select the high measurement result of output reliability, it is to avoid only with reluctance type tachogenerator exist test of low rotating speed it is inaccurate and
Only with the low defect of the Measurement reliability of vortex tachogenerator presence.
Brief description of the drawings
Fig. 1 is the structural representation of turbine speed pinboard of the present invention；
Fig. 2 is the application schematic diagram of turbine speed pinboard of the present invention.
Embodiment
Embodiment one：Illustrate present embodiment with reference to Fig. 1 and Fig. 2, steam turbine described in present embodiment turns
Fast pinboard, it includes dc source 1, first frequency electric pressure converter 2, second frequency electric pressure converter 3, height and selects circuit 4, ratio
Compared with circuit 5, phase inverter 6, the first relay 7 and the second relay 8,
Dc source 1 is used to provide working power for vortex tachogenerator；
The pulse signal positive pole output of the electrode input end connection vortex tachogenerator of first frequency electric pressure converter 2
End, the pulse signal cathode output end of the negative input connection vortex tachogenerator of first frequency electric pressure converter 2；
The electrode input end of second frequency electric pressure converter 3 connects the non-constant amplitude sinusoid signal of reluctance type tachogenerator
Cathode output end, the negative input of second frequency electric pressure converter 3 connects the non-constant amplitude sinusoid of reluctance type tachogenerator
Signal cathode output end；
The voltage signal output end connection height of first frequency electric pressure converter 2 selects the first voltage signal input part of circuit 4,
The voltage signal output end connection height of second frequency electric pressure converter 3 selects the second voltage signal input part of circuit 4, and height selects circuit
4 voltage signal output end connects the voltage signal inputs of comparison circuit 5, the voltage signal output end connection of comparison circuit 5
The voltage signal inputs of phase inverter 6, the level signal output end of phase inverter 6 connects the first relay 7 and the second relay simultaneously
The control signal input of device 8；
Electrode input end connection the first relay 7 first normally closed switch JI-1's of second frequency electric pressure converter 3 is normally closed
Stationary contact, electrode input end connection the first relay 7 first normally closed switch JI-1's of first frequency electric pressure converter 2 is normally opened quiet
Contact, the cathode output end of the normally closed switch JI-1 of the first relay 7 first selected tach signal of movable contact connection；
The normally closed switch JI-1 of first relay 7 first normally closed stationary contact connection the second relay 8 first normally closed switch J2-
1 normally closed stationary contact, the normally closed switch JI-1 of the first relay 7 first normally opened stationary contact the second relay 8 first of connection is normally closed
J2-1 normally opened stationary contact is switched, the normally closed switch J2-1 of the second relay 8 first movable contact the first relay 7 first of connection is normal
JI-1 movable contact is closed in make and break；
Negative input connection the first relay 7 second normally closed switch JI-2's of second frequency electric pressure converter 3 is normally closed
Stationary contact, negative input connection the first relay 7 second normally closed switch JI-2's of first frequency electric pressure converter 2 is normally opened quiet
Contact, the cathode output end of the normally closed switch JI-2 of the first relay 7 second selected tach signal of movable contact connection；
The normally closed switch JI-2 of first relay 7 second normally closed stationary contact connection the second relay 8 second normally closed switch J2-
2 normally closed stationary contact, the normally closed switch JI-2 of the first relay 7 second normally opened stationary contact the second relay 8 second of connection is normally closed
J2-2 normally opened stationary contact is switched, the normally closed switch J2-2 of the second relay 8 second movable contact the first relay 7 second of connection is normal
JI-2 movable contact is closed in make and break；
The voltage threshold that comparison circuit 5 is set is Vn, when the high voltage signal for selecting circuit 4 to export is more than comparison circuit 5
During voltage threshold Vn, the output high level of comparison circuit 5 controls the first relay 7 and the dead electricity of the second relay 8 by phase inverter 6,
The non-constant amplitude sinusoid signal that now reluctance type tachogenerator measurement is obtained is exported as selected tach signal；
When the high voltage signal for selecting circuit 4 to export is less than or equal to the voltage threshold Vn of comparison circuit 5, comparison circuit
5 output low levels, control the first relay 7 and the second relay 8 to obtain electric by phase inverter 6, are now vortexed tachogenerator and survey
The rotational speed pulse signal that amount is obtained is exported as selected tach signal.
Pinboard described in present embodiment is used to select vortex tachogenerator or the measurement of reluctance type tachogenerator to obtain
Turbine speed signal output.
As shown in figure 1, pulse signal and the sine wave signal of non-constant amplitude that rotating speed pinboard receives are respectively through frequency electricity
Pressure converter is changed, and forms DC voltage V1 and V2, V1 and V2 selects circuit output higher value through too high, the higher value enters and compared
Circuit, the voltage threshold Vn of the higher value and comparison circuit 5 is compared, comparison circuit selection output high level or low electricity
It is flat, then control two relays to obtain the corresponding rotating speed measured value of electric or dead electricity output by phase inverter 6.Two relays band respectively
Two, which open two, closes contact.
Embodiment two：Illustrate present embodiment with reference to Fig. 2, present embodiment is made into one to embodiment one
Step explanation, the voltage threshold that comparison circuit 5 is set as turbine speed be 500RPM when corresponding magnitude of voltage.
When rotating speed is more than 500 turns, two relay electric-loss are controlled, relay normally open contact disconnects, normally-closed contact adhesive,
The now sine wave signal output of the non-constant amplitude of reluctance type tachogenerator；When rotating speed is less than or equal to 500 turns, vortex is surveyed
The output of pulse signal of fast sensor.
Shown in Fig. 2, steam turbine vortex tachogenerator enters first passage of pinboard, is vortexed the straight of tachogenerator
Stream power supply is provided by turbine speed pinboard, and steam turbine reluctance type tachogenerator enters second passage of pinboard, vapour
When turbine rotating speed is below or equal to 500RPM, the pulse signal of rotating speed pinboard output vortex tachogenerator, steam turbine turns
When speed is higher than 500RPM, the sine wave signal of the non-constant amplitude of rotating speed pinboard output reluctance type tachogenerator, rotating speed pinboard
Output signal be directly entered turbine speed measuring system.
Claims (2)
1. a kind of turbine speed pinboard, it is characterised in that it includes dc source (1), first frequency electric pressure converter
(2), second frequency electric pressure converter (3), height select circuit (4), comparison circuit (5), phase inverter (6), the first relay (7) and
Two relays (8),
Dc source (1) is used to provide working power for vortex tachogenerator；
The pulse signal cathode output end of the electrode input end connection vortex tachogenerator of first frequency electric pressure converter (2),
The pulse signal cathode output end of the negative input connection vortex tachogenerator of first frequency electric pressure converter (2)；
The non-constant amplitude sinusoid signal of the electrode input end connection reluctance type tachogenerator of second frequency electric pressure converter (3) is just
Pole output end, the negative input of second frequency electric pressure converter (3) connects the non-constant amplitude sinusoid of reluctance type tachogenerator
Signal cathode output end；
The voltage signal output end connection height of first frequency electric pressure converter (2) selects the first voltage signal input part of circuit (4),
The voltage signal output end connection height of second frequency electric pressure converter (3) selects the second voltage signal input part of circuit (4), Gao Xuan
The voltage signal inputs of the voltage signal output end connection comparison circuit (5) of circuit (4), the voltage signal of comparison circuit (5)
The voltage signal inputs of output end connection phase inverter (6), the level signal output end of phase inverter (6) connects the first relay simultaneously
The control signal input of device (7) and the second relay (8)；
Electrode input end connection the first relay (7) first normally closed switch JI-1's of second frequency electric pressure converter (3) is normally closed
Stationary contact, electrode input end connection the first relay (7) first normally closed switch JI-1's of first frequency electric pressure converter (2) is normal
Open stationary contact, the cathode output end of the normally closed switch JI-1 of the first relay (7) the first selected tach signal of movable contact connection；
The normally closed switch JI-1 of first relay (7) first normally closed stationary contact connection the second relay (8) first normally closed switch J2-
1 normally closed stationary contact, the normally closed switch JI-1 of the first relay (7) first normally opened stationary contact connects the second relay (8) first
Normally closed switch J2-1 normally opened stationary contact, the normally closed switch J2-1 of the second relay (8) first movable contact connects the first relay
(7) first normally closed switch JI-1 movable contact；
Negative input connection the first relay (7) second normally closed switch JI-2's of second frequency electric pressure converter (3) is normally closed
Stationary contact, negative input connection the first relay (7) second normally closed switch JI-2's of first frequency electric pressure converter (2) is normal
Open stationary contact, the cathode output end of the normally closed switch JI-2 of the first relay (7) the second selected tach signal of movable contact connection；
The normally closed switch JI-2 of first relay (7) second normally closed stationary contact connection the second relay (8) second normally closed switch J2-
2 normally closed stationary contact, the normally closed switch JI-2 of the first relay (7) second normally opened stationary contact connects the second relay (8) second
Normally closed switch J2-2 normally opened stationary contact, the normally closed switch J2-2 of the second relay (8) second movable contact connects the first relay
(7) second normally closed switch JI-2 movable contact；
The voltage threshold that comparison circuit (5) is set is Vn, when the voltage signal that height selects circuit (4) to export is more than comparison circuit (5)
Voltage threshold Vn when, comparison circuit (5) output high level passes through phase inverter (6) and controls the first relay (7) and the second relay
Device (8) dead electricity, the non-constant amplitude sinusoid signal that now reluctance type tachogenerator measurement is obtained is defeated as selected tach signal
Go out；
When the voltage signal that height selects circuit (4) to export is less than or equal to the voltage threshold Vn of comparison circuit (5), comparison circuit
(5) low level is exported, controls the first relay (7) and the second relay (8) to obtain electric by phase inverter (6), now vortex tests the speed
The rotational speed pulse signal that sensor measurement is obtained is exported as selected tach signal.
2. turbine speed pinboard according to claim 1, it is characterised in that the voltage threshold of comparison circuit (5) setting
Value is corresponding magnitude of voltage when turbine speed is 500RPM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510125348.8A CN104793009B (en) | 2015-03-20 | 2015-03-20 | Turbine speed pinboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510125348.8A CN104793009B (en) | 2015-03-20 | 2015-03-20 | Turbine speed pinboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104793009A CN104793009A (en) | 2015-07-22 |
| CN104793009B true CN104793009B (en) | 2017-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510125348.8A Active CN104793009B (en) | 2015-03-20 | 2015-03-20 | Turbine speed pinboard |
Country Status (1)
| Country | Link |
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| CN (1) | CN104793009B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113721041B (en) * | 2021-11-03 | 2022-01-25 | 西安热工研究院有限公司 | Method and system for detecting disconnection of signals of turbine rotating speed measuring sensor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA964491A (en) * | 1969-07-03 | 1975-03-18 | Howard J. Evans | Turbine meter assembly |
| JP2012108022A (en) * | 2010-11-18 | 2012-06-07 | Hioki Ee Corp | Tachometer |
| CN204439652U (en) * | 2015-03-20 | 2015-07-01 | 哈尔滨汽轮机厂有限责任公司 | Turbine speed card extender |
-
2015
- 2015-03-20 CN CN201510125348.8A patent/CN104793009B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA964491A (en) * | 1969-07-03 | 1975-03-18 | Howard J. Evans | Turbine meter assembly |
| JP2012108022A (en) * | 2010-11-18 | 2012-06-07 | Hioki Ee Corp | Tachometer |
| CN204439652U (en) * | 2015-03-20 | 2015-07-01 | 哈尔滨汽轮机厂有限责任公司 | Turbine speed card extender |
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| Publication number | Publication date |
|---|---|
| CN104793009A (en) | 2015-07-22 |
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