CN104793009A - Revolution speed adapter plate for turbine - Google Patents
Revolution speed adapter plate for turbine Download PDFInfo
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- CN104793009A CN104793009A CN201510125348.8A CN201510125348A CN104793009A CN 104793009 A CN104793009 A CN 104793009A CN 201510125348 A CN201510125348 A CN 201510125348A CN 104793009 A CN104793009 A CN 104793009A
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Abstract
The invention relates to a revolution speed adapter plate for a turbine, which belongs to the technical field of turbine revolution speed measurement. The revolution speed adapter plate for the turbine aims at solving the problem that as the revolution speed measuring transducers of existing turbines are limited by respective functions, giving consideration to both accuracy and reliability is very difficult. The revolution speed adapter plate for the turbine comprises a direct-current power supply, a first frequency voltage converter, a second frequency voltage converter, a high selective circuit, a comparison circuit, an inverter, a first relay and a second relay, the two frequency voltage converters respectively receive speed signals output by a magnetic resistance type speed measuring transducer and an eddy speed measuring transducer, a greater value is output by the high selective circuit, after the greater value is compared with the voltage threshold value of the comparison circuit, an inverter is adopted to control the relay to gain power or lose power according to the level signal of the comparison circuit, and a revolution speed signal is selected to be output. The revolution speed adapter plate for the turbine is used for selecting and outputting the revolution speed signal obtained by the speed measuring transducer.
Description
Technical field
The present invention relates to turbine speed card extender, belong to turbine speed field of measuring technique.
Background technology
The measurement of current turbine speed has two kinds of modes, a kind of mode adopts magnetic resistance speed sensor, its advantage is need not outer power supply source, sensor construction is simple, easy to install, reliability is high, and the sinusoidal magnitude responded to when shortcoming is the slow-speed of revolution is little, easily be disturbed, cause turbine speed to measure and forbidden maybe cannot measure; Another kind of mode adopts rotational speed of eddy current sensor, its advantage is can the rotational speed pulse signal of outputting standard in the rotating speed valid interval 0 ~ 3600RPM of steam turbine, measure the rotating speed that display unit can measure steam turbine accurately, shortcoming needs outer power supply source, and the complex structure of rotational speed of eddy current sensor, reliability wants reluctancy formula speed probe low.
Summary of the invention
The rotating speed measuring sensor that the present invention seeks to solve existing steam turbine limit owing to being subject to respective function, makes accuracy and reliability be difficult to the problem taken into account, provides a kind of turbine speed card extender.
Turbine speed card extender of the present invention, it comprises direct supply, first frequency electric pressure converter, second frequency electric pressure converter, height select circuit, comparator circuit, phase inverter, the first relay and the second relay,
Direct supply is used for providing working power for eddy current tachogenerator;
The electrode input end of first frequency electric pressure converter connects the pulse signal cathode output end of eddy current tachogenerator, and the negative input of first frequency electric pressure converter connects the pulse signal cathode output end of eddy current tachogenerator;
The electrode input end of second frequency electric pressure converter connects the non-constant amplitude sinusoid signal cathode output end of reluctance type tachogenerator, and the negative input of second frequency electric pressure converter connects the non-constant amplitude sinusoid signal cathode output end of reluctance type tachogenerator;
The voltage signal output end of first frequency electric pressure converter connects high the first voltage signal inputs selecting circuit, the voltage signal output end of second frequency electric pressure converter connects high the second voltage signal inputs selecting circuit, height selects the voltage signal output end of circuit to connect the voltage signal inputs of comparator circuit, the voltage signal output end of comparator circuit connects the voltage signal inputs of phase inverter, and the level signal output terminal of phase inverter connects the control signal input end of the first relay and the second relay simultaneously;
The electrode input end of second frequency electric pressure converter connects the normally closed stationary contact of the first relay first normally closed switch JI-1, what the electrode input end of first frequency electric pressure converter connected the first relay first normally closed switch JI-1 often opens stationary contact, and the moving contact of the first relay first normally closed switch JI-1 connects the cathode output end of selected tach signal;
The normally closed stationary contact of the first relay first normally closed switch JI-1 connects the normally closed stationary contact of the second relay first normally closed switch J2-1, first relay first normally closed switch JI-1 often open that stationary contact connects the second relay first normally closed switch J2-1 often open stationary contact, the moving contact of the second relay first normally closed switch J2-1 connects the moving contact of the first relay first normally closed switch JI-1;
The negative input of second frequency electric pressure converter connects the normally closed stationary contact of the first relay second normally closed switch JI-2, what the negative input of first frequency electric pressure converter connected the first relay second normally closed switch JI-2 often opens stationary contact, and the moving contact of the first relay second normally closed switch JI-2 connects the cathode output end of selected tach signal;
The normally closed stationary contact of the first relay second normally closed switch JI-2 connects the normally closed stationary contact of the second relay second normally closed switch J2-2, first relay second normally closed switch JI-2 often open that stationary contact connects the second relay second normally closed switch J2-2 often open stationary contact, the moving contact of the second relay second normally closed switch J2-2 connects the moving contact of the first relay second normally closed switch JI-2;
The voltage threshold of comparator circuit setting is Vn, when the voltage signal that height selects circuit to export is greater than the voltage threshold Vn of comparator circuit, comparator circuit exports high level, by inverter controlling first relay and the second relay electric-loss, the non-constant amplitude sinusoid signal that now reluctance type tachogenerator measurement obtains exports as selected tach signal;
When the voltage signal that height selects circuit to export is less than or equal to the voltage threshold Vn of comparator circuit, comparator circuit output low level, obtain electric by inverter controlling first relay and the second relay, the rotational speed pulse signal that now eddy current tachogenerator measurement obtains exports as selected tach signal.
The magnitude of voltage that the voltage threshold of comparator circuit setting is corresponding when be turbine speed being 500RPM.
Advantage of the present invention: the present invention is by the design of change-over panel internal circuit, achieve the reception simultaneously to eddy current tachogenerator and reluctance type tachogenerator measuring-signal, simultaneously, change-over panel is also according to two type sensors advantage separately, select the measurement result that output reliability is high, avoid and only adopt reluctance type tachogenerator to there is the low defect of test of low rotating speed Measurement reliability that is inaccurate and that only adopt eddy current tachogenerator to exist.
Accompanying drawing explanation
Fig. 1 is the structural representation of turbine speed card extender of the present invention;
Fig. 2 is the application schematic diagram of turbine speed card extender of the present invention.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1 and Fig. 2, turbine speed card extender described in present embodiment, it comprises direct supply 1, first frequency electric pressure converter 2, second frequency electric pressure converter 3, height select circuit 4, comparator circuit 5, phase inverter 6, first relay 7 and the second relay 8
Direct supply 1 is for providing working power for eddy current tachogenerator;
The electrode input end of first frequency electric pressure converter 2 connects the pulse signal cathode output end of eddy current tachogenerator, and the negative input of first frequency electric pressure converter 2 connects the pulse signal cathode output end of eddy current tachogenerator;
The electrode input end of second frequency electric pressure converter 3 connects the non-constant amplitude sinusoid signal cathode output end of reluctance type tachogenerator, and the negative input of second frequency electric pressure converter 3 connects the non-constant amplitude sinusoid signal cathode output end of reluctance type tachogenerator;
The voltage signal output end of first frequency electric pressure converter 2 connects high the first voltage signal inputs selecting circuit 4, the voltage signal output end of second frequency electric pressure converter 3 connects high the second voltage signal inputs selecting circuit 4, height selects the voltage signal output end of circuit 4 to connect the voltage signal inputs of comparator circuit 5, the voltage signal output end of comparator circuit 5 connects the voltage signal inputs of phase inverter 6, and the level signal output terminal of phase inverter 6 connects the control signal input end of the first relay 7 and the second relay 8 simultaneously;
The electrode input end of second frequency electric pressure converter 3 connects the normally closed stationary contact of the first relay 7 first normally closed switch JI-1, what the electrode input end of first frequency electric pressure converter 2 connected the first relay 7 first normally closed switch JI-1 often opens stationary contact, and the moving contact of the first relay 7 first normally closed switch JI-1 connects the cathode output end of selected tach signal;
The normally closed stationary contact of the first relay 7 first normally closed switch JI-1 connects the normally closed stationary contact of the second relay 8 first normally closed switch J2-1, first relay 7 first normally closed switch JI-1 often open that stationary contact connects the second relay 8 first normally closed switch J2-1 often open stationary contact, the moving contact of the second relay 8 first normally closed switch J2-1 connects the moving contact of the first relay 7 first normally closed switch JI-1;
The negative input of second frequency electric pressure converter 3 connects the normally closed stationary contact of the first relay 7 second normally closed switch JI-2, what the negative input of first frequency electric pressure converter 2 connected the first relay 7 second normally closed switch JI-2 often opens stationary contact, and the moving contact of the first relay 7 second normally closed switch JI-2 connects the cathode output end of selected tach signal;
The normally closed stationary contact of the first relay 7 second normally closed switch JI-2 connects the normally closed stationary contact of the second relay 8 second normally closed switch J2-2, first relay 7 second normally closed switch JI-2 often open that stationary contact connects the second relay 8 second normally closed switch J2-2 often open stationary contact, the moving contact of the second relay 8 second normally closed switch J2-2 connects the moving contact of the first relay 7 second normally closed switch JI-2;
The voltage threshold that comparator circuit 5 sets is Vn, when the voltage signal that height selects circuit 4 to export is greater than the voltage threshold Vn of comparator circuit 5, comparator circuit 5 exports high level, control the first relay 7 and the second relay 8 dead electricity by phase inverter 6, the non-constant amplitude sinusoid signal that now reluctance type tachogenerator measurement obtains exports as selected tach signal;
When the voltage signal that height selects circuit 4 to export is less than or equal to the voltage threshold Vn of comparator circuit 5, comparator circuit 5 output low level, by phase inverter 6 control the first relay 7 and the second relay 8 electric, now eddy current tachogenerator is measured the rotational speed pulse signal obtained and is exported as selected tach signal.
The turbine speed signal output that card extender described in present embodiment obtains for selecting eddy current tachogenerator or reluctance type tachogenerator to measure.
As shown in Figure 1, the sine wave signal of the pulse signal that rotating speed card extender accepts and non-constant amplitude is changed respectively through FV convertor, form DC voltage V1 and V2, V1 and V2 exports higher value through the too high circuit that selects, this higher value enters comparator circuit, compared by the voltage threshold Vn of this higher value and comparator circuit 5, comparator circuit is selected to export high level or low level, then controls two relays through phase inverter 6 and obtain electric or dead electricity and export corresponding rotating speed measured value.Two relays are with two to open two respectively and are closed contact.
Embodiment two: present embodiment is described below in conjunction with Fig. 2, present embodiment is described further embodiment one, magnitude of voltage corresponding when the voltage threshold that comparator circuit 5 sets be turbine speed is 500RPM.
When rotating speed is greater than 500 turns, control two relay electric-loss, relay normally open contact disconnects, normally closed contact adhesive, and now the sine wave signal of the non-constant amplitude of reluctance type tachogenerator exports; When rotating speed is less than or equal to 500 turns, the output of pulse signal of eddy current tachogenerator.
Shown in Fig. 2, steam turbine eddy current tachogenerator enters first passage of card extender, the direct supply of eddy current tachogenerator is provided by turbine speed card extender, steam turbine reluctance type tachogenerator enters second passage of card extender, turbine speed lower than or when equaling 500RPM, rotating speed card extender exports the pulse signal of eddy current tachogenerator, when turbine speed is higher than 500RPM, rotating speed card extender exports the sine wave signal of the non-constant amplitude of reluctance type tachogenerator, and the output signal of rotating speed card extender directly enters turbine speed measuring system.
Claims (2)
1. a turbine speed card extender, it is characterized in that, it comprises direct supply (1), first frequency electric pressure converter (2), second frequency electric pressure converter (3), height select circuit (4), comparator circuit (5), phase inverter (6), the first relay (7) and the second relay (8)
Direct supply (1) is for providing working power for eddy current tachogenerator;
The electrode input end of first frequency electric pressure converter (2) connects the pulse signal cathode output end of eddy current tachogenerator, and the negative input of first frequency electric pressure converter (2) connects the pulse signal cathode output end of eddy current tachogenerator;
The electrode input end of second frequency electric pressure converter (3) connects the non-constant amplitude sinusoid signal cathode output end of reluctance type tachogenerator, and the negative input of second frequency electric pressure converter (3) connects the non-constant amplitude sinusoid signal cathode output end of reluctance type tachogenerator;
The voltage signal output end of first frequency electric pressure converter (2) connects high the first voltage signal inputs selecting circuit (4), the voltage signal output end of second frequency electric pressure converter (3) connects high the second voltage signal inputs selecting circuit (4), height selects the voltage signal output end of circuit (4) to connect the voltage signal inputs of comparator circuit (5), the voltage signal output end of comparator circuit (5) connects the voltage signal inputs of phase inverter (6), the level signal output terminal of phase inverter (6) connects the control signal input end of the first relay (7) and the second relay (8) simultaneously,
The electrode input end of second frequency electric pressure converter (3) connects the normally closed stationary contact of the first relay (7) first normally closed switch JI-1, what the electrode input end of first frequency electric pressure converter (2) connected the first relay (7) first normally closed switch JI-1 often opens stationary contact, and the moving contact of the first relay (7) first normally closed switch JI-1 connects the cathode output end of selected tach signal;
The normally closed stationary contact of the first relay (7) first normally closed switch JI-1 connects the normally closed stationary contact of the second relay (8) first normally closed switch J2-1, first relay (7) first normally closed switch JI-1 often open that stationary contact connects the second relay (8) first normally closed switch J2-1 often open stationary contact, the moving contact of the second relay (8) first normally closed switch J2-1 connects the moving contact of the first relay (7) first normally closed switch JI-1;
The negative input of second frequency electric pressure converter (3) connects the normally closed stationary contact of the first relay (7) second normally closed switch JI-2, what the negative input of first frequency electric pressure converter (2) connected the first relay (7) second normally closed switch JI-2 often opens stationary contact, and the moving contact of the first relay (7) second normally closed switch JI-2 connects the cathode output end of selected tach signal;
The normally closed stationary contact of the first relay (7) second normally closed switch JI-2 connects the normally closed stationary contact of the second relay (8) second normally closed switch J2-2, first relay (7) second normally closed switch JI-2 often open that stationary contact connects the second relay (8) second normally closed switch J2-2 often open stationary contact, the moving contact of the second relay (8) second normally closed switch J2-2 connects the moving contact of the first relay (7) second normally closed switch JI-2;
The voltage threshold that comparator circuit (5) sets is Vn, when the voltage signal that height selects circuit (4) to export is greater than the voltage threshold Vn of comparator circuit (5), comparator circuit (5) exports high level, control the first relay (7) and the second relay (8) dead electricity by phase inverter (6), the non-constant amplitude sinusoid signal that now reluctance type tachogenerator measurement obtains exports as selected tach signal;
When the voltage signal that height selects circuit (4) to export is less than or equal to the voltage threshold Vn of comparator circuit (5), comparator circuit (5) output low level, by phase inverter (6) control the first relay (7) and the second relay (8) electric, now eddy current tachogenerator is measured the rotational speed pulse signal obtained and is exported as selected tach signal.
2. turbine speed card extender according to claim 1, is characterized in that, the voltage threshold that comparator circuit (5) sets is turbine speed magnitude of voltage corresponding when being 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 |
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| Publication Number | Publication Date |
|---|---|
| CN104793009A true CN104793009A (en) | 2015-07-22 |
| CN104793009B CN104793009B (en) | 2017-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510125348.8A Active CN104793009B (en) | 2015-03-20 | 2015-03-20 | Turbine speed pinboard |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113721041A (en) * | 2021-11-03 | 2021-11-30 | 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113721041A (en) * | 2021-11-03 | 2021-11-30 | 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 |
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| Publication number | Publication date |
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| CN104793009B (en) | 2017-10-24 |
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