CN2178898Y - Rotational speed trends experimental stage for critical interdict apparatus - Google Patents
Rotational speed trends experimental stage for critical interdict apparatus Download PDFInfo
- Publication number
- CN2178898Y CN2178898Y CN 93239614 CN93239614U CN2178898Y CN 2178898 Y CN2178898 Y CN 2178898Y CN 93239614 CN93239614 CN 93239614 CN 93239614 U CN93239614 U CN 93239614U CN 2178898 Y CN2178898 Y CN 2178898Y
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- CN
- China
- Prior art keywords
- governor
- speed
- emergency
- overspeed
- rotational
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- 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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- Control Of Turbines (AREA)
Abstract
The utility model relates to a checking device for an overspeed security system of a steam turbine, which is composed of a stand 6, an electric motor 7 on the stand, a control unit 8 of the electric motor, a main shaft 9 on the stand in transmission connection with the electric motor and instant rotational-speed sensors 12 and 12', wherein, a connecting part 10 of an emergency governor is installed at the end head of the main shaft, the instant rotational-speed sensors are corresponding to the emergency governor and are connected with a rotational speed instrument 11, and the main shaft can be provided with a rotational-speed counting disc 13 and a corresponding rotational-speed sensor 14 thereof connected with the rotational speed instrument. The utility model can simulate action situations of an emergency governor of an overspeed-checking security system of a steam turbine and replace the existing rotational-speed dynamic checking experiment which needs to be carried out on a steam turbine.
Description
The utility model relates to the check device of the hypervelocity security system of steam turbine.
Emergency governor, overspeed governor is in the operation process of steam turbine, for preventing the emergency overspeed trip of the physical construction formula that hypervelocity " driving " accident is provided with, as shown in Figure 1, the main body knockson assembly 1 of emergency governor, overspeed governor is installed on the ring flange of turbine spindle 2, knockson 3 is with respect to main shaft 2 eccentric settings, measure spring 4 knockson 3 is pressed to main core, measure the tension force of spring and adjust with setting nut 5.When turbine speed is elevated to setting value (being generally 109～112% rated speeds) above rated speed, knockson overcomes and measures spring tension and hit under the effect of rotary centrifugal force, starts emergency brake mechanism, steam turbine is stopped in emergency, and " driving " accident that prevents takes place.
Owing to reasons such as manufacturing process, each parts in the knockson assembly can not process absolutely accurate, can accurately hit at the setting transient speed of steam turbine for obtaining knockson, must be before the steam turbine input runs well, emergency governor, overspeed governor is carried out the speed dynamic test, the knockson assembly is debugged accurately, promptly adjust the pretension of measuring spring 4 by adjusting setting nut 5, the transient speed of transient speed when knockson is hit and steam turbine emergency brake is synchronous, and is accurate to guarantee the steam turbine emergency brake.
The speed dynamic test of original emergency governor, overspeed governor; be on steam turbine, to carry out on the spot; need be during debugging by whole program start steam turbines; when steam turbine exceeded the speed limit to setting value, if the emergency governor, overspeed governor knockson does not hit, promptly steam turbine can not be realized emergency brake; after then need shutting down by normal procedure; the knockson assembly is done to adjust once more, restart steam turbine again and test, until when setting rotating speed, realizing the steam turbine emergency brake.This knockson method of adjustment on steam turbine is without any the accurate data of science, and entirely by rule of thumb, therefore, its adjustment often need be carried out just finishing for 3-5 time.Need expend great amount of manpower, financial resources and time.
Given this, the purpose of this utility model just is to provide a kind of speed dynamic testing table that can accurately debug emergency governor, overspeed governor before installation.
Emergency governor, overspeed governor speed dynamic testing table of the present utility model (referring to accompanying drawing), comprise support (6), motor on the support (7), the controller of motor (8), the main shaft that links to each other with electric-motor drive (9) on the support, spindle end is installed the connecting portion (10) of emergency governor, overspeed governor, moment speed probe corresponding with emergency governor, overspeed governor and that link to each other with rotating speed instrument (11) (12,12 ')
Before being installed on the steam turbine, emergency governor, overspeed governor is installed on the connecting portion (10) of main shaft (9) of this testing table of simulation turbine spindle 2, steering controller (8) starts and adjusts the rotating speed of motor (7), the electric-motor drive main axis rotation, when being elevated to, the rotary centrifugal force of the eccentric knockson of emergency governor, overspeed governor overcomes the tension force of measuring spring 4 and when hitting, the transient speed signals that moment speed probe (12,12 ') will hit moment main shaft (9) passes to the rotating speed instrument, calculates, writes down, shows.The main shaft transient speed shown according to the rotating speed instrument, the setting nut 5 of adjusting emergency governor, overspeed governor is measured the tension force of spring 4 to adjust, restart testing table, the main shaft transient speed that hits until knockson reaches setting value exactly, finishes the speed dynamic test revision of emergency governor, overspeed governor.
Above-mentioned main shaft (9), can be fixed with rotating speed numeration dish (13) and speed probe (14) corresponding with rotating speed numeration dish and that link to each other with rotating speed instrument (11), by speed probe and rotating speed instrument, show the speed of mainshaft and control main shaft to be no more than high-risk rotating speed, prevent that testing table from " driving " accident taking place.
Transmission between above-mentioned main shaft and the motor reel can be belt gear, chain transmission, gear drive, also can be direct-connected transmission.
Above-mentioned rotating speed numeration dish (13) can be the fluted disc that tooth is arranged, and also can be porose porose disc.
Above-mentioned connecting portion (10) can be a ring flange, but also can be usually other demolition syndetons.
The utility model emergency governor, overspeed governor speed dynamic testing table has following advantage and effect.
One, installation site and the operating state of emergency governor, overspeed governor on testing table can be simulated installation site and operating state on steam turbine exactly, therefore carries out the action of emergency governor, overspeed governor and check on testing table, can be substituted in the check on the steam turbine.
Two, the utility model is simple in structure, compares with check emergency governor, overspeed governor on steam turbine, and is not only easy and simple to handle, can shorten the check time significantly, and can save a large amount of repeatedly with the huge funds and the energy of test working steam turbine.It is investigated, the once action of the emergency governor, overspeed governor of one 200,000 kilowatts turbodynamo is checked, after needing raise steam preheating, water supply, steam supply, power supply, auxiliary system startup and entering normal operation, the steam turbine repeated multiple times from the starting of zero rotating speed, the test run quickening, hit to knockson until raising speed, need 48～72 hours approximately, cost and reach 10～150,000 Renminbi (not comprising consumption such as wear and tear in machines and manpower), and use this testing table only to need 1～2 hour, expensive about 1000 yuan.(comprising the test depreciation cost)
Three, the testing table design has safety monitoring, the control device that is made of speed probe and rotating speed instrument etc., and " driving " accident can not take place, and is safe and reliable.
Below, again with embodiment and comparative examples accompanying drawing, emergency governor, overspeed governor speed dynamic testing table of the present utility model is described further.
Brief description of drawings.
Fig. 1 is the structure of the knockson assembly 1 of emergency governor, overspeed governor, and is installed in the syndeton synoptic diagram on the turbine spindle 2.
Fig. 2 is the structural representation of a kind of emergency governor, overspeed governor speed dynamic testing table of the present utility model.(the knockson assembly 1 of emergency governor, overspeed governor has been installed).
Dotted line is represented cable among the figure.
Embodiment 1:
A kind of emergency governor, overspeed governor speed dynamic testing table of the present utility model, as shown in Figure 2.The support 6 that a box-shaped is arranged, motor 7 are packed in the case of support, and motor shaft 15 stretches out outside the casing, are fixed with the main spindle box 16 of box-shaped on the case face of support, rely on two groups of bearings that main shaft 9 rotatably is housed in the main spindle box.One end of main shaft 9 is fixed with the rotating speed numeration dish 13 of fluted disc shape structure, in the inboard near rotating speed numeration dish 13 belt pulley 19 that is connected with main shaft is arranged, and links to each other with belt pulley 21 transmissions of motor shaft 15 ends with driving belt 20, thereby constitutes belt drive.The other end of main shaft 9 has the connecting portion 10 of the emergency governor, overspeed governor of flange plate structure.Available bolt is installed in the knockson assembly 1 of emergency governor, overspeed governor on the ring flange.This knockson assembly have two knocksons 3 and 3 '.With the appropriate location of the corresponding support of emergency governor, overspeed governor, be equipped with knockson 3 and 3 ' corresponding separately and have the common moment speed probe 12 and 12 of two of suitable distance '.In the appropriate location of coiling 13 corresponding main spindle boxes 16 with the rotating speed numeration, being fixed with one has the common speed probe 14 of suitable distance with rotating speed numeration dish 13.In the suitable distance of distance support 6, the switch board 22 of box-shaped is arranged.Switch board also can be integral with support, or controller 8, rotating speed instrument 11 are arranged on the support.In switch board 22, be equiped with the common controller 8 of the motor 7 that is electrically connected with motor 7, with startup, speed change, the shutdown of control motor.In switch board 22, also be equiped with and moment speed probe 12,12 ' and the common rotating speed instrument 11 that is electrically connected of speed probe 14.The rotating speed instrument can write down above-mentioned three signals that sensor passes enters, computing, data accumulating and demonstration.
Claims (6)
1, emergency governor, overspeed governor speed dynamic testing table, it is characterized in that comprising support (6), motor on the support (7), the controller of motor (8), the main shaft that links to each other with electric-motor drive (9) on the support, spindle end is installed the connecting portion (10) of emergency governor, overspeed governor, moment speed probe corresponding with emergency governor, overspeed governor and that link to each other with rotating speed instrument (11) (12,12 ').
2, emergency governor, overspeed governor speed dynamic testing table as claimed in claim 1 is characterized in that being fixed with rotating speed numeration dish (13) on the said main shaft (9), and speed probe (14) corresponding with rotating speed numeration dish and that connect with above-mentioned rotational speed meters epiphase is arranged.
3, emergency governor, overspeed governor speed dynamic testing table as claimed in claim 2 is characterized in that said transmission is belt drive.
4, emergency governor, overspeed governor speed dynamic testing table as claimed in claim 2 is characterized in that said transmission is direct-connected transmission.
5, emergency governor, overspeed governor speed dynamic testing table as claimed in claim 2 is characterized in that said rotating speed numeration dish is a fluted disc.
6, as the arbitrary described emergency governor, overspeed governor speed dynamic testing table of claim 1～5, it is characterized in that said connecting portion is a ring flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93239614 CN2178898Y (en) | 1993-11-25 | 1993-11-25 | Rotational speed trends experimental stage for critical interdict apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93239614 CN2178898Y (en) | 1993-11-25 | 1993-11-25 | Rotational speed trends experimental stage for critical interdict apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2178898Y true CN2178898Y (en) | 1994-10-05 |
Family
ID=33814100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93239614 Expired - Fee Related CN2178898Y (en) | 1993-11-25 | 1993-11-25 | Rotational speed trends experimental stage for critical interdict apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2178898Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424368A (en) * | 2015-12-12 | 2016-03-23 | 浙江杰特优动力机械有限公司 | Fly ball test apparatus and test method thereof |
| CN105928709A (en) * | 2016-04-22 | 2016-09-07 | 大唐东北电力试验研究所有限公司 | Steam turbine set emergency governor test device |
-
1993
- 1993-11-25 CN CN 93239614 patent/CN2178898Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424368A (en) * | 2015-12-12 | 2016-03-23 | 浙江杰特优动力机械有限公司 | Fly ball test apparatus and test method thereof |
| CN105424368B (en) * | 2015-12-12 | 2018-07-10 | 浙江杰特优动力机械有限公司 | A kind of flyball experimental rig and its test method |
| CN105928709A (en) * | 2016-04-22 | 2016-09-07 | 大唐东北电力试验研究所有限公司 | Steam turbine set emergency governor test device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |