CN202305552U - Speed measuring device of generation unit power turbine - Google Patents
Speed measuring device of generation unit power turbine Download PDFInfo
- Publication number
- CN202305552U CN202305552U CN2011204025141U CN201120402514U CN202305552U CN 202305552 U CN202305552 U CN 202305552U CN 2011204025141 U CN2011204025141 U CN 2011204025141U CN 201120402514 U CN201120402514 U CN 201120402514U CN 202305552 U CN202305552 U CN 202305552U
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- measuring device
- speed measuring
- permanent magnet
- power turbine
- rotating shaft
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Abstract
The utility model discloses a speed measuring device of a generation unit power turbine, comprising a permanent magnet which is arranged on a generator connecting rotating shaft, a Hall sensor which is close to the outer circumferential surface of the generator connecting rotating shaft, a signal processor which is connected with the Hall sensor, a programmable controller which is connected with the signal processor and a direct current power supply which supplies working power to the signal processor. According to the speed measuring device of the generation unit power turbine, the cost of the Hall sensor is low, the production cost of the speed measuring device of the generation unit power turbine is effectively reduced, simultaneously the speed measuring device of the generation unit power turbine has a simple structure and good performance, is easy to maintain, and has strong anti-interference capability.
Description
Technical field
The utility model relates to the detection range of genset power turbine rotating speed, is specifically related to a kind of speed measuring device of genset power turbine.
Background technology
The rotating speed of genset is generating plant-normal operation-vital parameter; It is a key physical amount of reflection unit operation situation; Whether the rotating speed of genset is stabilized in rated speed; To directly have influence on the output ground quality of power supply, its measured value and accuracy thereof will be directly connected to the quality of the safety operation level and the electrical network of generating plant, and the rotating speed of genset is an important parameter of the robotization control program of genset.
Chinese patent ZL 201020170314.3 discloses a kind of MW class wind turbine group speed measuring device, is used for the measurement of genset rotating speed.Said device includes step-up gear, hollow major axis, fixed head, sensor stand, tachogenerator and the counting scale that tests the speed, and the said counting scale that tests the speed is set on the hollow major axis of step-up gear, and said fixed head is fixedly set on the lateral wall of step-up gear; Said sensor stand links to each other with fixed head; Said tachogenerator is installed on the sensor stand, and said tachogenerator places above the counting scale that tests the speed, than the mounting means of routine; When step-up gear operates at blower fan; Operating steadily can not produce shake, thereby the progress that tests the speed of the sensing that guaranteed to test the speed, though this public technology scheme is improved the mounting means of existing speed measuring device; But each building block of its speed measuring device all is existing; Because the limitation of original each building block of speed measuring device, this technical scheme all remains further to be improved to the accuracy of the measurement of genset rotating speed, and mounting stability also remains further to be improved.
Publication number is that the one Chinese patent application of CN 101762716A discloses a kind of fluted disc speed measuring device for water turbine generator; Comprise that two Hall switch holes probe CP1, CP2 form one group of feedback signal that tests the speed and are installed on by the measure speed gears; The output signal of two Hall switch holes probe CP1, CP2 is connected to through lead-in wire on the signal input terminal of the special signal disposable plates that is installed in the speed regulator Electric Appliance Cabinet, and the fluted disc signal one the tunnel is judged correcting errors of input signal through monostalbe trigger after step-down, filtering, amplitude limit, shaping.This technical scheme produces pulse signal and high level signal through two Hall switch holes probe CP1, CP2; Pulse signal and frequency measurement periodic signal that signal-processing board will pass through after the processing such as step-down, filtering, amplitude limit, shaping, frequency division are input to PLC high-speed counting plate, and the CPU that the high-speed counting plate is transferred to PLC with the frequency signal of rotating speed through bus is as the speed regulator speed feedback signal.This technical scheme improves to the stability of rate accuracy and rotating speed; But it is not owing to require the speed measuring fluted disc machining precision, and two Hall switch holes probe CP1, CP2 leave very closely each other, survey pulse signal and high level signal; There is certain interference between the possible acknowledge(ment) signal; Simultaneously, Signal Processing is also comparatively complicated, and the degree of accuracy of the measurement of its rotating speed needs further to improve.
Summary of the invention
The utility model provide a kind of simple structure, antijamming capability good, be easy to safeguard, the speed measuring device of genset power turbine that rate accuracy is high.
A kind of speed measuring device of genset power turbine comprises being installed in the direct supply that generator connects permanent magnet in the rotating shaft, connects the Hall element of the outer circumference surface of rotating shaft, the signal processor that links to each other with Hall element, the Programmable Logic Controller that links to each other with signal processor and working power is provided for signal processor near generator.
When the speed measuring device of the utility model genset power turbine comes into operation; Its measuring sensor is to be made up of Hall element and permanent magnet; Generator shaft drives generator connection rotating shaft rotation, and generator connects the also and then rotation of permanent magnet in the rotating shaft, when the permanent magnet of installing in the generator connection rotating shaft passes through (in coverage) Hall element sensitive surface successively; Hall element produces voltage difference, thereby provides one to measure pulse signal.After this measurement pulse signal carried out technical finesses such as shaping, self-locking, distortion, frequency division through signal processor, the feedback speed signal (square wave) that output one is isolated was sent into Programmable Logic Controller, and Programmable Logic Controller just can obtain tachometer value.The tachometer value that obtains can be used as a feedback speed signal of governing speed, and arrangements for speed regulation are stably controlled the rotating speed of genset power turbine through this feedback speed signal.
Following optimal technical scheme as the utility model:
Being connected perpendicular to generator of described Hall element and permanent magnet place changeed axial cross section and is in same plane, makes the more stable voltage difference of Hall element generation, thereby a more stable measurement pulse signal is provided.
The outside that described generator connects the permanent magnet in the rotating shaft is provided with teflon annular sleeve; Teflon annular sleeve is fixed through trip bolt, is connected in the rotating shaft thereby with trip bolt the permanent magnetism iron hoop is contained in generator through teflon annular sleeve.The inwall of described teflon annular sleeve is provided with the groove that matches with permanent magnet; Thereby further permanent magnet is fixed; Permanent magnet is fixed on generator firmly to be connected in the rotating shaft; When even generator connection rotating shaft rotating speed is higher, also can permanent magnet be fixed on generator preferably and connects in the rotating shaft.Described permanent magnet is connected between the rotating shaft with generator and is adhesively fixed through epoxy resin sealant, so that further increase permanent magnet is connected rotating shaft with generator firmness.
Described permanent magnet is a plurality of, is evenly distributed on generator and connects in the rotating shaft, has shortened the feedback time of speed, so that in the process of testing the speed, can produce stable pulse signal, can measure the rotating speed of genset power turbine exactly.
Described permanent magnet is 50～60; Because in commercial Application; The diameter that generator connects rotating shaft has certain requirement, and when permanent magnet was 50～60, the speed measuring device of genset power turbine can in time feed back the rotating speed of genset power turbine; Thereby make Programmable Logic Controller and arrangements for speed regulation in time to control, to reach the purpose of speed stabilizing to the rotating speed of genset power turbine.Simultaneously, antijamming capability is stronger, and rate accuracy is higher.
Compared with prior art, the utlity model has following advantage:
The Hall element of the utility model is with low cost, effectively reduces the production cost of the speed measuring device of genset power turbine, simultaneously, the speed measuring device simple structure of genset power turbine, performance is good, is easy to safeguard.The speed measuring device of genset power turbine has stronger antijamming capability under comparatively abominable electromagnetic environment, can eliminate the error that hall signal produces effectively, improves rate accuracy.A plurality of permanent magnets particularly are set, have shortened the feedback time of speed,, can measure the rotating speed of genset power turbine exactly so that in the process of testing the speed, can produce stable pulse signal.When the rotating speed of genset power turbine hangs down; Also can be in time with pulse signal; Shortened the feedback time of speed; Thereby make Programmable Logic Controller and arrangements for speed regulation in time to control, reaching the purpose of speed stabilizing, can't speed be fed back timely and cause the technical barrier that speed stabilizing is difficult under the low speed thereby solved traditional velocity-measuring system to the rotating speed of genset power turbine.
Description of drawings
Fig. 1 is the structural representation of the speed measuring device of the utility model genset power turbine;
Fig. 2 is the structural representation that the generator of the utility model connects rotating shaft and permanent magnet;
Fig. 3 is the cross section structure synoptic diagram that amplify at assigned address A place among Fig. 2.
Embodiment
As shown in Figure 1, be the speed measuring device of the utility model genset power turbine, comprise permanent magnet 20, Hall element 30, signal processor 40, direct supply 50 and Programmable Logic Controller 60.Permanent magnet 20 is installed in generator and connects in the rotating shaft 10, and permanent magnet 20 can specifically be selected Nd-Fe-B magnet steel for use, is cylindrical (diameter is 8mm, and height is 4mm).The axial cross section that is connected rotating shaft 10 perpendicular to generator at Hall element 30 and permanent magnet 20 places is in same plane and near the outer circumference surface of generator connection rotating shaft 10; The induction end of Hall element 30 is towards permanent magnet 20; Hall element 30 will be within coverage with permanent magnet 20; Promptly when permanent magnet 20 rotated the sensitive surface of process Hall elements 30, Hall element 30 produced voltage differences, thereby the pulse signal of a measurement is provided.Hall element 30 can specifically select to adopt N1H-5C-70 Hall tachogenerator (M18*1.5), measurable frequency range: 0.2Hz to 20,000Hz.Signal processor 40 links to each other with Hall element 30, and direct supply 50 links to each other with signal processor 40, is used to signal processor 40 working power is provided.Programmable Logic Controller 60 links to each other with signal processor 40.
Programmable Logic Controller 60 also can adopt the commercially available prod, and the PLC of general select tape counting module adopts SIEMENS FM350-1 like counting module, is used in SIEMENS S7-300 or the M7-300 control system, forms the PLC of band counting module.
Like Fig. 2, shown in Figure 3, the outside that generator connects the permanent magnet 20 in the rotating shaft 10 is provided with teflon annular sleeve 200, and teflon annular sleeve 200 is fixing through trip bolt 300.Teflon annular sleeve 200 is circular; Teflon annular sleeve 200 inwalls are provided with the groove that matches with permanent magnet 20; Permanent magnet 20 is packed in the groove, with circular teflon annular sleeve 200 permanent magnet 20 hoops is loaded on generator and connects in the rotating shaft 10.Permanent magnet 20 is connected between the rotating shaft 10 with generator and is adhesively fixed with epoxy resin sealant 100.Permanent magnet 20 is 55, and trip bolt 300 is 5, is evenly distributed on generator and connects in the rotating shaft 10.
The principle of work of the utility model is following:
When the speed measuring device of the utility model genset power turbine comes into operation; Its measuring sensor is to be made up of Hall element 30 and permanent magnet 20; Generator shaft drives generator connection rotating shaft 10 rotations, and generator connects the also and then rotation of permanent magnet 20 in the rotating shaft 10, when the permanent magnet of installing in the generator connection rotating shaft 10 20 passes through (in coverage) Hall element 30 sensitive surface successively; Hall element 30 produces voltage difference, thereby provides one to measure pulse signal.After this measurement pulse signal carried out technical finesses such as shaping, self-locking, distortion, frequency division through signal processor 40, the feedback speed signal (square wave) that output one is isolated was sent into Programmable Logic Controller 60, and Programmable Logic Controller 60 just can obtain tachometer value.The tachometer value that obtains can be used as a feedback speed signal of governing speed, and arrangements for speed regulation are stably controlled the rotating speed of genset power turbine through this feedback speed signal.
Claims (7)
1. the speed measuring device of a genset power turbine; It is characterized in that, comprise that being installed in generator connects permanent magnet (20) in the rotating shaft (10), connects the Hall element (30) of the outer circumference surface of rotating shaft (10), the signal processor (40) that links to each other with Hall element (30), the Programmable Logic Controller (60) that links to each other with signal processor (40) and be the direct supply (50) that signal processor (40) provides working power near generator.
2. the speed measuring device of genset power turbine according to claim 1 is characterized in that, the axial cross section that is connected rotating shaft (10) perpendicular to generator at described Hall element (30) and permanent magnet (20) place is in same plane.
3. the speed measuring device of genset power turbine according to claim 1; It is characterized in that; The outside that described generator connects the permanent magnet (20) in the rotating shaft (10) is provided with teflon annular sleeve (200), and teflon annular sleeve (200) is fixing through trip bolt (300).
4. the speed measuring device of genset power turbine according to claim 3 is characterized in that, the inwall of described teflon annular sleeve (200) is provided with the groove that matches with permanent magnet (20).
5. according to the speed measuring device of claim 1,3 or 4 described genset power turbines, it is characterized in that described permanent magnet (20) is connected with generator between the rotating shaft (10) and is adhesively fixed through epoxy resin sealant (100).
6. the speed measuring device of genset power turbine according to claim 1 is characterized in that, described permanent magnet (20) is a plurality of, is evenly distributed on generator and connects in the rotating shaft (10).
7. the speed measuring device of genset power turbine according to claim 6 is characterized in that, described permanent magnet (20) is 50～60.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204025141U CN202305552U (en) | 2011-10-20 | 2011-10-20 | Speed measuring device of generation unit power turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204025141U CN202305552U (en) | 2011-10-20 | 2011-10-20 | Speed measuring device of generation unit power turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202305552U true CN202305552U (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204025141U Expired - Lifetime CN202305552U (en) | 2011-10-20 | 2011-10-20 | Speed measuring device of generation unit power turbine |
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| CN (1) | CN202305552U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103961771A (en) * | 2014-04-09 | 2014-08-06 | 邓旋 | Medical compression type atomizer |
| CN105675907A (en) * | 2016-03-31 | 2016-06-15 | 中国神华能源股份有限公司 | Speed measuring device, slag conveyor structure and power plant boiler |
| CN107976556A (en) * | 2017-11-27 | 2018-05-01 | 日照职业技术学院 | A kind of micro-mechanical magnetic field sensor |
| CN108107230A (en) * | 2017-12-01 | 2018-06-01 | 中广核工程有限公司 | A kind of nuclear power station main pump speed measuring system and method |
| CN108612959A (en) * | 2018-04-27 | 2018-10-02 | 浙江浙能天然气运行有限公司 | A kind of support of natural gas tube pipeline robot and mileage measuring device |
| CN109709879A (en) * | 2019-02-18 | 2019-05-03 | 江苏茶花电气股份有限公司 | Programmable hall ON-OFF control circuit |
| CN109765398A (en) * | 2019-01-18 | 2019-05-17 | 北京工业大学 | A kind of monitoring device of hobboing cutter revolving speed |
| CN113586470A (en) * | 2021-08-24 | 2021-11-02 | 西安航天动力研究所 | Structure is measured to turbopump rotational speed |
-
2011
- 2011-10-20 CN CN2011204025141U patent/CN202305552U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103961771A (en) * | 2014-04-09 | 2014-08-06 | 邓旋 | Medical compression type atomizer |
| CN105675907A (en) * | 2016-03-31 | 2016-06-15 | 中国神华能源股份有限公司 | Speed measuring device, slag conveyor structure and power plant boiler |
| CN107976556A (en) * | 2017-11-27 | 2018-05-01 | 日照职业技术学院 | A kind of micro-mechanical magnetic field sensor |
| CN108107230A (en) * | 2017-12-01 | 2018-06-01 | 中广核工程有限公司 | A kind of nuclear power station main pump speed measuring system and method |
| CN108612959A (en) * | 2018-04-27 | 2018-10-02 | 浙江浙能天然气运行有限公司 | A kind of support of natural gas tube pipeline robot and mileage measuring device |
| CN108612959B (en) * | 2018-04-27 | 2019-11-01 | 浙江浙能天然气运行有限公司 | A kind of support of natural gas tube pipeline robot and mileage measuring device |
| CN109765398A (en) * | 2019-01-18 | 2019-05-17 | 北京工业大学 | A kind of monitoring device of hobboing cutter revolving speed |
| CN109709879A (en) * | 2019-02-18 | 2019-05-03 | 江苏茶花电气股份有限公司 | Programmable hall ON-OFF control circuit |
| CN113586470A (en) * | 2021-08-24 | 2021-11-02 | 西安航天动力研究所 | Structure is measured to turbopump rotational speed |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |
|
| CX01 | Expiry of patent term |