CN2932792Y - Programmable speed measurement brake screen - Google Patents
Programmable speed measurement brake screen Download PDFInfo
- Publication number
- CN2932792Y CN2932792Y CN 200620035208 CN200620035208U CN2932792Y CN 2932792 Y CN2932792 Y CN 2932792Y CN 200620035208 CN200620035208 CN 200620035208 CN 200620035208 U CN200620035208 U CN 200620035208U CN 2932792 Y CN2932792 Y CN 2932792Y
- Authority
- CN
- China
- Prior art keywords
- speed
- fluted disc
- programmable
- control device
- generating set
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a programmable speed measurement brake control panel, comprising a speed measurement fluted disc, an approach switch, a programmable control device and a touch screen, wherein the speed measurement fluted disc is arranged at the main shaft of a generator and rotates with the main shaft, the approach switch is arranged beside the speed measurement fluted disc, the rotary speed pulse signal output by the approach switch is sent to the input unit of the programmable control device, the central processing unit of the programmable control device calculates the rotary speed, the voltage-frequency and the rotary speed percentage of the electric generating set according to the input digital pulse and sends the numerical result to the touch screen for displaying through a RS-232 cable. And the output unit will output the low-speed/over-speed guard signal to the supervisory computer, when the programmable control device measures that the electric generating set is in a low-speed/over-speed status. The utility model has the advantages that it can continuously monitor the low-speed and over-speed procedure parameters of the electric generating set, and has high reliability and visual and convenient operation.
Description
Technical field
The utility model relates to a kind of generating set rotating speed measure and control device, particularly relates to a kind of programmable speed testing braking screen.
Background technology
Generally speaking, generator speed reduces to 35HZ from normal condition and is judged to " low speed " state when following before being incorporated into the power networks, after being incorporated into the power networks, in some small grids, the generator speed potentially unstable is when generator speed (is judged to " low speed " fault less than set point during 46.5HZ～49.5HZ).Similarly; it is preceding after system's load rejection and protection tripping operation to be incorporated into the power networks; the hydraulic turbine has little time to cut out water valve; generator frequency (rotating speed) surpasses set point and (is judged to " overrunning " fault during 55.0HZ～75.0HZ), (is judged to " overrunning " fault during 55.0HZ～75.0HZ) above set point when generator frequency (rotating speed) after being incorporated into the power networks.No matter be low speed or overrun that all unfavorable to generator, therefore Detection ﹠ Controling systems such as unit speed, pressure, position, electric weight have all been set up in each power station at present, but the existing system cost is higher, information indicating and parameter are provided with directly perceived inadequately, convenient.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of programmable speed testing braking screen is provided, and this braking screen that tests the speed not only can be saved cost, and reliability is very high, the operation intuitive and convenient.
Goal of the invention of the present utility model is achieved through the following technical solutions: programmable speed testing braking screen, it comprises speed measuring fluted disc, near switch, Programmable Logic Controller, touch-screen, speed measuring fluted disc is installed on the generator shaft and with main shaft and rotates, be positioned at the speed measuring fluted disc next door near switch, deliver to the input unit of Programmable Logic Controller near the rotational speed pulse signal of switch output, the CPU of Programmable Logic Controller is according to the rotating speed of the digit pulse calculating generator group of input, electric voltage frequency and rotating speed percentage, and computation structure is sent to screen displaying by the RS-232 cable.
After Programmable Logic Controller detection generating set was in lower-speed state, its output unit output low speed guard signal was to host computer.
After Programmable Logic Controller detection generating set was in the state of overrunning, its output unit output overspeed protection signal was to host computer.
Near switch is that the NPN type is near switch.
The course of work of the present utility model roughly is: speed measuring fluted disc is installed on generator shaft; speed measuring fluted disc rotates with main shaft; be positioned at the speed measuring fluted disc next door near switch; obtain and the proportional pulse signal of generator speed from main shaft near switch; and this signal is input to the input unit of Programmable Logic Controller; the CPU of Programmable Logic Controller is according to the rotating speed of the digit pulse calculating generator group of input; electric voltage frequency and rotating speed percentage; and result of calculation is sent to screen displaying by the RS-232 cable; simultaneously; after if unit is in lower-speed state; Programmable Logic Controller is exported the low speed guard signal to host computer by output unit; after if generating set is in the state of overrunning, Programmable Logic Controller is exported the overspeed protection signal to host computer by output unit.
The computational methods of generating set rotating speed are: the frequency of rotating speed=pulse signal * 60/ number of pole-pairs.
The computational methods of generator output voltage frequency are: the frequency of electric voltage frequency=pulse signal.
The computational methods of generating set percentage rotating speed are: percentage rotating speed=rotating speed/rated speed * 100%.
Operating personnel can be provided with generating set low speed and the threshold values of overrunning by touch-screen, and its setting up procedure can carry out according to the prompting on the touch-screen, the operation intuitive and convenient.
Advantage of the present utility model is: can be to the low speed of generating set and the continuous parameters monitoring of overrunning, and reliability is very high, the operation intuitive and convenient.
Description of drawings
Fig. 1 composition frame chart of the present utility model
Fig. 2 main control process flow figure of the present utility model
Embodiment
Further describe the technical solution of the utility model below in conjunction with accompanying drawing: as Fig. 1, programmable speed testing braking screen, it comprises speed measuring fluted disc, near switch, Programmable Logic Controller, touch-screen, speed measuring fluted disc is installed on the generator shaft and with main shaft and rotates, near switch is that the NPN type is near switch, it is positioned at the speed measuring fluted disc next door, deliver to the input unit of Programmable Logic Controller near the rotational speed pulse signal of switch output, the CPU of Programmable Logic Controller is according to the rotating speed of the digit pulse calculating generator group of input, electric voltage frequency and rotating speed percentage, and computation structure is sent to screen displaying by the RS-232 cable.
As Fig. 2, after Programmable Logic Controller detection generating set was in lower-speed state, its output unit output low speed guard signal was to host computer; After perhaps Programmable Logic Controller detection generating set was in the state of overrunning, its output unit output overspeed protection signal was to host computer.
Claims (2)
1, programmable speed testing braking screen, it is characterized in that: it comprises speed measuring fluted disc, near switch, Programmable Logic Controller, touch-screen, speed measuring fluted disc is installed on the generator shaft and with main shaft and rotates, be positioned at the speed measuring fluted disc next door near switch, deliver to the input unit of Programmable Logic Controller near the pulse signal of switch output, the CPU of Programmable Logic Controller is according to rotating speed, electric voltage frequency and the rotating speed percentage of digit pulse computer set of input, and computation structure is sent to screen displaying by the RS-232 cable.
2, programmable speed testing braking screen according to claim 1, it is characterized in that: near switch is that the NPN type is near switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620035208 CN2932792Y (en) | 2006-08-08 | 2006-08-08 | Programmable speed measurement brake screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620035208 CN2932792Y (en) | 2006-08-08 | 2006-08-08 | Programmable speed measurement brake screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2932792Y true CN2932792Y (en) | 2007-08-08 |
Family
ID=38349283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620035208 Expired - Fee Related CN2932792Y (en) | 2006-08-08 | 2006-08-08 | Programmable speed measurement brake screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2932792Y (en) |
-
2006
- 2006-08-08 CN CN 200620035208 patent/CN2932792Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070808 Termination date: 20100808 |