CN218916214U - Absolute expansion checking tool for rotor of high-pressure cylinder of steam turbine - Google Patents
Absolute expansion checking tool for rotor of high-pressure cylinder of steam turbine Download PDFInfo
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- CN218916214U CN218916214U CN202222800599.XU CN202222800599U CN218916214U CN 218916214 U CN218916214 U CN 218916214U CN 202222800599 U CN202222800599 U CN 202222800599U CN 218916214 U CN218916214 U CN 218916214U
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Abstract
The utility model belongs to the technical field of measurement, and particularly relates to a tool for checking absolute expansion of a rotor of a high-pressure cylinder of a steam turbine. The device comprises a supporting leg, wherein the supporting leg is connected with a magnetic platform through a fixing screw, a groove is formed in the magnetic platform, a target baffle is arranged in the groove, an adjusting device is fixed on the magnetic platform, a dial indicator fixing arm platform is magnetically attracted to the magnetic platform, an upper dial indicator is inserted into the dial indicator fixing arm platform, and a level gauge is placed on the magnetic platform. The utility model has the beneficial effects that: the sensor adjusting frame is fixed on the base of the device, the dial indicator is adjusted to contact the back of the probe, the numerical value is measured through the adjusting regulator, the operation is simple, the use is convenient, and the maintenance cost is low; the device has accurate reading, extremely small measurement error and quick measurement, improves the working efficiency and saves the overhaul period; the device can be used for installing different target materials, and has strong applicability.
Description
Technical Field
The utility model belongs to the technical field of measurement, and particularly relates to a tool for checking absolute expansion of a rotor of a high-pressure cylinder of a steam turbine.
Background
In the start-stop process of the steam turbine generator unit, high-temperature and high-pressure steam from a loop is sent to a cylinder body of the steam turbine, and the cylinder body and a rotor can generate thermal expansion due to thermal expansion and contraction. In the start-stop process of the unit, the cylinder body and the rotor are required to be heated and changed at the same ratio, if the ratio of the thermal expansion of the cylinder body to the thermal expansion of the rotor is different, axial bumping (namely dynamic bumping) and grinding of the equipment can possibly occur, so that the equipment is damaged, and the expansion difference protection instrument is used for monitoring the relative expansion difference between the cylinder body and the rotor of the unit due to the thermal expansion. When the expansion value exceeds the limit value of the unit design, the unit should be turned, so that the expansion difference value is controlled within a certain controlled range, and meanwhile, the expansion difference value can also be found out in time because of unsmooth expansion of the rotor or the cylinder body, thereby avoiding accidents caused by dynamic and static collision and grinding of the unit.
The high-medium pressure rotor expands from the thrust bearing to the machine head direction, a sensor is used for monitoring the expansion amount of the high-medium pressure rotor, and the expansion difference between the high-medium pressure rotor and the cylinder is calculated by combining the data of the absolute expansion sensor of the high-medium pressure cylinder, so that a basis is provided for avoiding the friction release between the steam turbine and the motor.
In order to ensure the operation safety of the steam turbine and the accuracy of detection, the sensor is required to be checked before the probe is installed, the required error of the steam turbine is within 0.05mm, the traditional method is to use a dial indicator to carry out zero full point adjustment and multipoint measurement for a plurality of times during the installation, and the method is limited by the narrow working environment, and has low working efficiency and long measurement time. Based on the utility model, special equipment is developed to achieve the purpose of rapidly and accurately measuring the absolute expansion of the high-pressure cylinder rotor.
Disclosure of Invention
The utility model aims to provide a tool for checking the absolute expansion of a rotor of a high-pressure cylinder of a steam turbine, which can be used for measuring the linearity of the absolute expansion of the rotor of the high-pressure cylinder more accurately, more time-effectively and more time-effectively during the maintenance of the absolute expansion of the rotor of the high-pressure cylinder of a nuclear power plant.
The technical scheme of the utility model is as follows: the utility model provides a turbine high pressure cylinder rotor absolute expansion check-up instrument, includes the landing leg, and the landing leg links to each other with the fixed screw for the magnetic platform, and it has the groove to open on the magnetic platform, is equipped with the target baffle in the groove, is fixed with adjusting device on the magnetic platform, and the magnetic platform magnetism is inhaled has the fixed arm platform of percentage table, and the fixed arm platform of percentage table has inserted the dial indicator, places the spirit level on the magnetic platform.
The device comprises a static instrument, a front end processor and a control unit, wherein the static instrument is used for supplying a 24V power supply to the front end processor and detecting the output current of a probe, and the front end processor is used for collecting and processing high-frequency oscillation signals and signals of the probe.
The four supporting legs are L-shaped steel plates and are connected with the magnetic platform through fixing screws.
The number of the fixing screws is 8, the model is M4.0, and the fixing screws are used for connecting the supporting legs and the magnetic platform.
The magnetic platform is a square flat plate, a rectangular groove is formed in the magnetic platform, and threaded holes are formed in four corners of the magnetic platform.
The magnetic platform is provided with a rectangular groove, and an adjusting screw is penetrated in the rectangular groove and is used for fixing the target baffle.
The target baffle is an L-shaped baffle, the bottom of the target baffle is provided with a rectangular groove, and the target baffle and the rectangular groove of the magnetic platform are fixed by adjusting screws.
The adjusting device is connected with the magnetic platform through a fixed screw.
The utility model has the beneficial effects that: the sensor adjusting frame is fixed on the base of the device, the dial indicator is adjusted to contact the back of the probe, the numerical value is measured through the adjusting regulator, the operation is simple, the use is convenient, and the maintenance cost is low; the device has accurate reading, extremely small measurement error and quick measurement, improves the working efficiency and saves the overhaul period; the device can be used for installing different target materials, and has strong applicability.
Drawings
FIG. 1 is a schematic diagram of a tool for checking the absolute expansion of a rotor of a high-pressure cylinder of a steam turbine;
fig. 2 is a top view of fig. 1.
In the figure: the device comprises a supporting leg 1, a fixing screw 2, a magnetic platform 3, an adjusting screw 4, a target baffle 5, a sensor 6, an adjusting device 7, a dial indicator 8, a dial indicator fixing arm platform 9, a level meter 10, a fixing screw 11, a static meter 12 and a front device 13.
Detailed Description
The utility model will be described in further detail with reference to the accompanying drawings and specific examples.
The utility model provides a tool for checking the absolute expansion of a rotor of a high-pressure cylinder of a steam turbine, which simulates the actual working condition of the field by utilizing the gap current generated between a target material and a probe, and achieves the effect of checking an expansion sensor by measuring displacement by a dial indicator and measuring an actual current signal by a static instrument.
As shown in figures 1 and 2, the absolute expansion checking tool for the rotor of the high-pressure cylinder of the steam turbine comprises four supporting legs 1, wherein the four supporting legs are L-shaped steel plates with the thickness of 3mm, the bottoms of the supporting legs 1 are in direct contact with the ground, 5mm screw holes are formed in the tops of the supporting legs, the supporting legs are connected with a magnetic platform 3 through fixing screws 2, the number of the fixing screws 2 is 8, and the model number of the fixing screws is M4.0, and the fixing screws are used for connecting the supporting legs 1 with the magnetic platform 3; the magnetic platform 3 is a square flat plate, has the thickness of 3mm, has a flat, soft and smooth surface, is provided with rectangular grooves with the length of 100mm and the width of 5mm, is provided with 4.5mm threaded holes at four corners, and is fixed with four supporting legs by fixing screws at the bottom for placing a sensor, a target baffle plate and the like. The 2 adjusting screws 4 penetrate through rectangular grooves on the magnetic platform 3 to fix the magnetic platform 3 and the target baffle 5; the target baffle 5 is an L-shaped baffle, the material adopts 701BD1 (34 CrNi3 Mo) which is the same as the material of the rotor of the steam turbine, a rectangular groove with the length of 50mm and the width of 5mm is formed at the bottom, and the target baffle and the rectangular groove of the magnetic platform are fixed at a proper position by using an adjusting screw 4 and are used for forming a gap with the probe to generate an eddy current; the sensor 6 is a DP243 electric vortex sensor produced by VIBRO-METER and is a detected device; the adjusting device 7 is fixed on the magnetic platform 3, and is used for simulating the field working condition by rotating the knob to adjust the displacement of the sensor; the dial indicator 8 is inserted into the dial indicator fixed arm platform 9 and is used for measuring the displacement of the sensor; the dial indicator fixing arm platform 9 is magnetically attracted to the magnetic platform 3 and is used for adjusting and fixing the position of the dial indicator; the level meter 10 is placed on the magnetic platform 3 and is used for observing the levelness of the platform; the number of the fixing screws 11 is 2, the model is M8.0, and the fixing screws are used for connecting the adjusting device 7 and the magnetic platform 3. The static instrument 12 is used for supplying 24V power to the front-end processor 13 and detecting the output current of the probe; the pre-processor 13 is used for collecting and processing the high-frequency oscillation signals and signals of the probe.
The working process of the utility model is as follows:
1. removing the sensor, the pre-amble and the adjustment device from the site;
2. and (3) installing and checking tools: installing the supporting legs, screwing the supporting legs by using a fixing screw, installing and fixing the adjusting device, rotating the knob clockwise to be tight, and installing and fixing the target baffle close to the probe;
3. adjusting a dial indicator fixing arm platform to enable the dial indicator probe to contact the back of the probe and fix the dial indicator fixing arm, the dial indicator and the platform;
4. the front-end processor is connected with a 24V power supply supplied by the static instrument, a current measurement wiring and a probe wiring;
5. reversely rotating the rotating wheel of the adjusting frame, stopping rotating when the displacement reaches 3.5mm, determining the initial position of the sensor, and resetting the dial indicator to zero;
6. rotating the rotating wheel of the adjusting frame to enable the current to respectively adjust a offset, sensitivity, lin positioner (current in the clockwise direction is increased and current in the anticlockwise direction is reduced) on the front-end processor RE101 at 4mA, 15mA and 30mA until the current error of the two points is less than or equal to 0.05 mA;
7. after the adjustment is finished, rotating the rotating wheel of the adjusting frame to enable the indicating value of the dial indicator to return to 0mm, checking whether the current output meets the requirement, and adjusting until the current output is qualified;
8. and (3) rotating an adjusting frame rotating wheel to carry out 5-point calibration on the probe, rotating a knob of an adjusting device to enable the probe to generate a gap with the target baffle, displaying current readings by a static meter, judging the displacement of the probe by a dial indicator, and if the current error is less than or equal to 0.05mA, calibrating to be qualified.
Claims (8)
1. The utility model provides a turbine high pressure cylinder rotor absolute expansion check-up instrument which characterized in that: the device comprises a supporting leg, wherein the supporting leg is connected with a magnetic platform through a fixing screw, a groove is formed in the magnetic platform, a target baffle is arranged in the groove, an adjusting device is fixed on the magnetic platform, a dial indicator fixing arm platform is magnetically attracted to the magnetic platform, an upper dial indicator is inserted into the dial indicator fixing arm platform, and a level gauge is placed on the magnetic platform.
2. The turbine high pressure cylinder rotor absolute expansion checking tool as claimed in claim 1, wherein: the device comprises a static instrument, a front end processor and a control unit, wherein the static instrument is used for supplying a 24V power supply to the front end processor and detecting the output current of a probe, and the front end processor is used for collecting and processing high-frequency oscillation signals and signals of the probe.
3. The turbine high pressure cylinder rotor absolute expansion checking tool as claimed in claim 1, wherein: the four supporting legs are L-shaped steel plates and are connected with the magnetic platform through fixing screws.
4. The turbine high pressure cylinder rotor absolute expansion checking tool as claimed in claim 1, wherein: the number of the fixing screws is 8, the model is M4.0, and the fixing screws are used for connecting the supporting legs and the magnetic platform.
5. The turbine high pressure cylinder rotor absolute expansion checking tool as claimed in claim 1, wherein: the magnetic platform is a square flat plate, a rectangular groove is formed in the magnetic platform, and threaded holes are formed in four corners of the magnetic platform.
6. The turbine high pressure cylinder rotor absolute expansion checking tool as claimed in claim 1, wherein: the magnetic platform is provided with a rectangular groove, and an adjusting screw is penetrated in the rectangular groove and is used for fixing the target baffle.
7. The turbine high pressure cylinder rotor absolute expansion checking tool as claimed in claim 6, wherein: the target baffle is an L-shaped baffle, the bottom of the target baffle is provided with a rectangular groove, and the target baffle and the rectangular groove of the magnetic platform are fixed by adjusting screws.
8. The turbine high pressure cylinder rotor absolute expansion checking tool as claimed in claim 1, wherein: the adjusting device is connected with the magnetic platform through a fixed screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222800599.XU CN218916214U (en) | 2022-10-24 | 2022-10-24 | Absolute expansion checking tool for rotor of high-pressure cylinder of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222800599.XU CN218916214U (en) | 2022-10-24 | 2022-10-24 | Absolute expansion checking tool for rotor of high-pressure cylinder of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218916214U true CN218916214U (en) | 2023-04-25 |
Family
ID=86042373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222800599.XU Active CN218916214U (en) | 2022-10-24 | 2022-10-24 | Absolute expansion checking tool for rotor of high-pressure cylinder of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218916214U (en) |
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2022
- 2022-10-24 CN CN202222800599.XU patent/CN218916214U/en active Active
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