CN111735375A - Steam turbine cylinder expansion displacement sensor calibration device - Google Patents
Steam turbine cylinder expansion displacement sensor calibration device Download PDFInfo
- Publication number
- CN111735375A CN111735375A CN202010690973.8A CN202010690973A CN111735375A CN 111735375 A CN111735375 A CN 111735375A CN 202010690973 A CN202010690973 A CN 202010690973A CN 111735375 A CN111735375 A CN 111735375A
- Authority
- CN
- China
- Prior art keywords
- fixed
- support plate
- plate
- right support
- steam turbine
- 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.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention belongs to the technical field of steam turbine state monitoring, and particularly relates to a steam turbine cylinder expansion displacement sensor calibration device. The two cushion blocks are respectively fixed at one end of the bottom plate, the mounting plate is fixed on the two cushion blocks, the right support plate is fixed at the other end of the bottom plate, and the left support plate is fixed on the bottom plate and is parallel to the right support plate; the measuring chute and the guide chute are fixed between the left support plate and the right support plate in parallel, the hand wheel is fixed at one end of the screw rod, the screw rod is fixed on the right support plate, the other end of the screw rod is fixed on the slide block, the screw rod penetrates through the cover plate, and the cover plate is fixed on the right support plate; the sliding block is arranged between the measuring chute and the guide chute, and the sliding block can be moved between the measuring chute and the guide chute by rotating the hand wheel; one end of the optical axis penetrates through the left support plate and is fixed on the sliding block, and the other end of the optical axis is fixed with the transition sleeve. The problems that the operation of an original calibration mode is complex and the precision cannot meet the requirement are effectively solved, and the working efficiency is improved extremely high.
Description
Technical Field
The invention belongs to the technical field of steam turbine state monitoring, and particularly relates to a steam turbine cylinder expansion displacement sensor calibration device.
Background
The steam turbine cylinder expansion displacement measuring instrument participates in the protection tripping of the steam turbine, and the sensor has the characteristics of high resolution, small hysteresis and compact structure in the whole measuring range, and senses the change of the distance by moving a ferromagnetic core in the sensor. The structure is particularly related to the protection of the steam turbine, and each overhaul period needs to be sent to a professional institution for verification.
At present, the method commonly adopted for checking the steam turbine cylinder expansion displacement sensor in China is realized by a vernier caliper and an auxiliary fixing device. The method has the following defects: 1) the measurement is carried out in a mode that the vernier caliper is fixed with the ferromagnetic core and is moved, and the measurement is not accurate. Because the precision requirement of the instrument is 2% of the measuring range, the error caused by the method is large, and the accurate calibration of the sensor cannot be ensured; 2) due to the fact that the magnetic core is moved, the linearity of the movement cannot be guaranteed in the checking process; 3) the tight connection between the caliper and the iron core cannot be ensured; 4) the checking time and the checking workload are large.
In view of the above circumstances, a special steam turbine cylinder expansion displacement sensor calibration device needs to be developed.
Disclosure of Invention
The existing steam turbine cylinder expansion displacement measurement sensor has a plurality of problems in calibration, firstly, the calibration precision cannot be guaranteed, and the error is large; meanwhile, the checking steps are complex, the checking time and the checking workload are large, and the checking can not be carried out on site. Based on the above, the invention aims to provide a steam turbine cylinder expansion displacement sensor calibration device, which is used for testing the accuracy of probe measurement by simulating the motion of cylinder expansion, and fundamentally eliminating the problem of large measurement error caused by poor probe linearity in the unit operation process.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a steam turbine cylinder expansion displacement sensor calibration device comprises a bottom plate, a left support plate, a right support plate, a cover plate, a measuring chute, a guide chute, a cushion block, a slide block, a screw, a hand wheel, an optical axis, a mounting plate and a transition sleeve; the two cushion blocks are respectively fixed at one end of the bottom plate, the mounting plate is fixed on the two cushion blocks, the right support plate is fixed at the other end of the bottom plate, and the left support plate is fixed on the bottom plate and is parallel to the right support plate; the measuring chute and the guide chute are fixed between the left support plate and the right support plate in parallel, the hand wheel is fixed at one end of the screw rod, the screw rod is fixed on the right support plate, the other end of the screw rod is fixed on the slide block, the screw rod penetrates through the cover plate, and the cover plate is fixed on the right support plate; the sliding block is arranged between the measuring chute and the guide chute, and the sliding block can be moved between the measuring chute and the guide chute by rotating the hand wheel; one end of the optical axis penetrates through the left support plate and is fixed on the sliding block, and the other end of the optical axis is fixed with the transition sleeve.
The two cushion blocks are respectively fixed at one end of the bottom plate through screws.
The mounting plate is fixed on the two cushion blocks through screws.
The right support plate is fixed at the other end of the bottom plate through a screw.
And a measuring scale is arranged on the measuring chute.
The cover plate is fixed on the right support plate through screws.
One end of the optical axis penetrates through the left support plate and is fixed on the sliding block through a screw.
The transition sleeve is provided with a screw hole, and the movable ferromagnetic core of the sensor is fixed in the screw hole.
The beneficial effects obtained by the invention are as follows:
the invention can verify the static characteristic, the linear characteristic and the corresponding card characteristic of the sensor. The problems that the operation of an original calibration mode is complex and the precision cannot meet the requirement are effectively solved, and the working efficiency is improved extremely high.
Drawings
FIG. 1 is a block diagram of a steam turbine cylinder expansion displacement sensor verification device;
in the figure: 1. a base plate; 2. a left support plate; 3. a right support plate; 4. a cover plate; 5. a measuring chute; 6. a guide chute; 7. cushion blocks; 8. a slider; 9. a screw; 10. a hand wheel; 11. an optical axis; 12. mounting a plate; 13. and (4) transition sleeve.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
As shown in fig. 1, the present invention includes a bottom plate 1, a left support plate 2, a right support plate 3, a cover plate 4, a measuring chute 5, a guide chute 6, a cushion block 7, a slide block 8, a screw 9, a hand wheel 10, an optical axis 11, a mounting plate 12, and a transition sleeve 13. The sensor and the sensor moving ferromagnetic core are not part of the invention.
The device comprises two parts, a sensor fixing support and a measuring device. The concrete structure is as follows:
fixing a support: the displacement sensor for fixing the expansion of the steam turbine cylinder is composed of two cushion blocks 7, a mounting plate 12 and a bottom plate 1.
A measuring device: the device comprises a left support plate 2, a right support plate 3, a cover plate 4, a measuring chute 5, a guide chute 6, a sliding block 8, a screw rod 9, a hand wheel 10, an optical axis 11, a mounting plate 12 and a transition sleeve 13.
The connection relationship of each part is as follows:
the two cushion blocks 7 are respectively fixed at one end of the bottom plate 1 through screws.
The mounting plate 12 is fixed on the two cushion blocks 7 through screws for fixing the sensor.
The right support plate 3 is fixed at the other end of the bottom plate 1 through screws, and the left support plate 2 is fixed on the bottom plate 1 and is parallel to the right support plate 3.
The measuring chute 5 and the guide chute 6 are fixed between the left support plate 2 and the right support plate 3 in parallel, wherein the guide chute 6 plays a role in guiding left and right, and the measuring chute 5 is provided with a measuring scale for measuring and guiding.
The hand wheel 10 is fixed at one end of the screw 9, and the screw 9 is fixed on the right support plate 3. The other end of the screw 9 is fixed on the slide block 8. The screw 9 passes through the cover plate 4, and the cover plate 4 is fixed on the right support plate 3 through screws.
The sliding block 8 is arranged between the measuring chute 5 and the guide chute 6, and the sliding block 8 can be moved between the measuring chute 5 and the guide chute 6 by rotating the hand wheel 10.
One end of the optical axis 11 penetrates through the left support plate 2 and is fixed on the sliding block 8 through a screw, and the other end of the optical axis 11 is fixed with the transition sleeve 13.
The transition sleeve 13 is provided with a screw hole M3 in which the moving ferromagnetic core of the sensor is fixed.
In use, the sensor to be verified is secured to the mounting plate 12 and the moving ferromagnetic core of the sensor is secured to the transition sleeve 13. The sensor is powered on, the hand wheel 10 is rotated, the sliding block 8 moves in the measuring chute 5 and the guide chute 6, the optical axis 11 is driven to move, and the ferromagnetic core measured by the sensor moves in the sensor. The sensors can be verified by recording test data at regular intervals (e.g. 5mm) of movement as dictated by the measurement chute 5.
Claims (8)
1. The utility model provides a steam turbine jar displacement sensor calibration equipment that expands which characterized in that: the device comprises a bottom plate, a left support plate, a right support plate, a cover plate, a measuring chute, a guide chute, a cushion block, a slide block, a screw rod, a hand wheel, an optical axis, a mounting plate and a transition sleeve; the two cushion blocks are respectively fixed at one end of the bottom plate, the mounting plate is fixed on the two cushion blocks, the right support plate is fixed at the other end of the bottom plate, and the left support plate is fixed on the bottom plate and is parallel to the right support plate; the measuring chute and the guide chute are fixed between the left support plate and the right support plate in parallel, the hand wheel is fixed at one end of the screw rod, the screw rod is fixed on the right support plate, the other end of the screw rod is fixed on the slide block, the screw rod penetrates through the cover plate, and the cover plate is fixed on the right support plate; the sliding block is arranged between the measuring chute and the guide chute, and the sliding block can be moved between the measuring chute and the guide chute by rotating the hand wheel; one end of the optical axis penetrates through the left support plate and is fixed on the sliding block, and the other end of the optical axis is fixed with the transition sleeve.
2. The steam turbine cylinder expansion displacement sensor verification device of claim 1, wherein: the two cushion blocks are respectively fixed at one end of the bottom plate through screws.
3. The steam turbine cylinder expansion displacement sensor verification device of claim 1, wherein: the mounting plate is fixed on the two cushion blocks through screws.
4. The steam turbine cylinder expansion displacement sensor verification device of claim 1, wherein: the right support plate is fixed at the other end of the bottom plate through a screw.
5. The steam turbine cylinder expansion displacement sensor verification device of claim 1, wherein: and a measuring scale is arranged on the measuring chute.
6. The steam turbine cylinder expansion displacement sensor verification device of claim 1, wherein: the cover plate is fixed on the right support plate through screws.
7. The steam turbine cylinder expansion displacement sensor verification device of claim 1, wherein: one end of the optical axis penetrates through the left support plate and is fixed on the sliding block through a screw.
8. The steam turbine cylinder expansion displacement sensor verification device of claim 1, wherein: the transition sleeve is provided with a screw hole, and the movable ferromagnetic core of the sensor is fixed in the screw hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010690973.8A CN111735375A (en) | 2020-07-17 | 2020-07-17 | Steam turbine cylinder expansion displacement sensor calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010690973.8A CN111735375A (en) | 2020-07-17 | 2020-07-17 | Steam turbine cylinder expansion displacement sensor calibration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111735375A true CN111735375A (en) | 2020-10-02 |
Family
ID=72654827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010690973.8A Pending CN111735375A (en) | 2020-07-17 | 2020-07-17 | Steam turbine cylinder expansion displacement sensor calibration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111735375A (en) |
-
2020
- 2020-07-17 CN CN202010690973.8A patent/CN111735375A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105043190B (en) | Five-axis linkage machine tools RTCP dynamic accuracies caliberating device and its scaling method | |
| CN106705823A (en) | Field calibration method for linear displacement sensor | |
| WO2016150005A1 (en) | Automatic detection method and apparatus for digital caliper | |
| CN105180763A (en) | Concrete structure steel bar protection layer thickness detection environment calibrating device and operation method | |
| CN204854519U (en) | Five -axle linkage lathe RTCP dynamic precision calibration device | |
| CN104776782B (en) | A kind of parallel plane gap measuring device and measuring method | |
| CN109357607B (en) | Full-automatic vibrating wire type strain sensor calibration device | |
| CN100501336C (en) | Universal precision displacement measurement auxiliary device | |
| CN114993188A (en) | Length measuring machine capable of solving temperature influence | |
| CN102809359A (en) | Claw pole boss height measuring device | |
| CN102486365A (en) | Air gauge and working method thereof | |
| CN112240993B (en) | Evaluation system and method for compact cyclotron magnetic field stability measurement | |
| CN212963176U (en) | Steam turbine cylinder expansion displacement sensor calibration device | |
| CN111735375A (en) | Steam turbine cylinder expansion displacement sensor calibration device | |
| CN202092622U (en) | Height measuring device of claw pole boss | |
| CN204461266U (en) | Vernier caliper calibrating installation | |
| CN1313502A (en) | Image-type automatic calibrating instrument for micrometer gauge or dial gauge | |
| CN101183049B (en) | Nc milling machine error automatic sizing device | |
| CN114018132B (en) | Digital display radian measuring device | |
| CN101949672B (en) | Method and device for calibrating top plate dynamic apparatus | |
| CN102213663B (en) | Calibration instrument for depth sounding device of metal Rockwell hardness tester | |
| CN204988621U (en) | Horizontal reed dynamometer calibrating device | |
| CN206387326U (en) | Ball bar standard set-up | |
| CN108333072A (en) | A kind of road surface dynamic deflection calibration method and device based on respondent behavior reconstruct | |
| CN210604203U (en) | Three-point bending electric automatic accurate centering adjustment fixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |