CN204301683U - Turbine rotor eccentric azimuth on-Line Monitor Device - Google Patents
Turbine rotor eccentric azimuth on-Line Monitor Device Download PDFInfo
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- CN204301683U CN204301683U CN201420845607.5U CN201420845607U CN204301683U CN 204301683 U CN204301683 U CN 204301683U CN 201420845607 U CN201420845607 U CN 201420845607U CN 204301683 U CN204301683 U CN 204301683U
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Abstract
The utility model discloses turbine rotor eccentric azimuth on-Line Monitor Device, comprise eccentric azimuth measuring instrument and coupled mark current vortex sensor and monitor current vortex sensor, mark current vortex sensor probe is arranged on the position that can rotate to reference section when armature spindle rotates, be installed on bearing housing fixture, monitoring current vortex sensor alignment probe rotor shaft bearings axle journal place.The utility model adopts monitoring current vortex sensor to record the gap on probe and armature spindle surface, the position of different gap is calculated by mark current vortex sensor, the displacement signal of gained different angles is sent on eccentric azimuth measuring instrument, obtain the detection of max bend position, achieve certainty of measurement high, data are accurate, simple to operation, efficiently solve the problem that detection maximum result is inaccurate, complex operation is inconvenient existed in prior art, this equipment has the simple feature of structure simultaneously.
Description
Technical field
The utility model relates to and a kind ofly has certainty of measurement is high, data are accurate, easy to operate turbine rotor eccentric azimuth on-Line Monitor Device, belongs to the eccentric high some location fix angular measurement of turbine rotor and on-line monitoring technique field.
Background technology
Steam turbine is in startup or stopping process, and armature spindle misalignment measurement has become requisite measure the item.It can measure the amplitude of the caused bending shaft such as bending, the gravity-bending in the quiescent state caused due to original mechanical bend, interim temperature rise.Steam turbine now can realize the accurate measurement of eccentric amplitude size, but can not determine that maximum amplitude occurs in accurate location circumferentially.
Enforce in China's power generation in " preventing 25 of power generation accident important requirements " for many years about clearly proposing in " preventing turbine rotor bending shaft accident " " data that steam turbine should possess comprises: rotor is installed the maximum of original curved and rocked the axial location of value (bias) maximum deflection point and the position at circumferencial direction ".Also specify: when there is serious friction, rotor height point being placed in extreme higher position, taking vexed cylinder measure, monitoring rotor bow degree simultaneously.As can be seen here, turbine rotor eccentric shaft is azimuthal determines to have huge effect to the safety of equipment.
Adopt the method for manual measurement at engineering site misalignment measurement, that is: first measuring point is polished smooth, dial holder is fixed on bearing or cylinder horizontal integration face.In order to measure the position of maximum degree of rocking, circumference need be divided into eight equal portions, with pen according to counterclockwise numbering.Move rotor by rotation steering wheel, aim at each point in turn and measure, and record the numerical value of each measuring point.Eccentricity value is the maximum difference of diameter two ends relative value, and 1/2 of maximum degree of rocking is maximum deflection value.The position that record maximum eccentric value place eight equal parts point occurs.This hand dipping is owing to only have recorded the reading of 8 points on steam turbine rotor shaft, and the height point of record is a region instead of the high point of locating rotor bow accurately in fact, and numerous and diverse when operating, not easy to operate.
Summary of the invention
The technical problems to be solved in the utility model is: provide a kind of turbine rotor eccentric azimuth on-Line Monitor Device, structure is simple, and certainty of measurement is high, and data are accurate, simple to operation, to overcome prior art Problems existing.
The technical scheme that the utility model is taked is: turbine rotor eccentric azimuth on-Line Monitor Device, comprise eccentric azimuth measuring instrument, mark current vortex sensor and monitoring current vortex sensor, described eccentric azimuth measuring instrument is connected with mark current vortex sensor and monitoring current vortex sensor by fore-lying device, described mark current vortex sensor probe is arranged on the position that can rotate to reference section when armature spindle rotates, be installed on bearing housing fixture, described monitoring current vortex sensor alignment probe rotor shaft bearings axle journal place, probe and rotor axial plane keep the distance in current vortex sensor range ability.
Described reference section can adopt groove or boss, is convenient to sign mutation and produces pulse, determine rotation reference zero point, to obtain the angle position of maximum eccentric point, and is convenient to manufacture.
Described mark current vortex sensor and monitoring current vortex sensor range adopt more than 2mm, can meet the scope that armature spindle detects.
Described armature spindle surface is 3/4ths of monitoring current vortex sensor range to the probe end face distance of monitoring current vortex sensor, is convenient to accurate measurement, avoids data measured inaccuracy, affect testing result.
The plane of described groove or boss long and wide minimum be more than 3 times of probe diameter, be convenient to accurate measurement, avoid data measured inaccuracy, affect testing result.
Described mark current vortex sensor adopts fixed support to be fixedly connected with monitoring current vortex sensor, fixed support adopts steel plate to make, and be provided with the hole of wearing current vortex sensor, bore dia is greater than current vortex screw rod, be fixedly connected on rotor tank wall by screw, be convenient to make and install.
The beneficial effects of the utility model: compared with prior art, the utility model adopts monitoring current vortex sensor to record the gap on probe and armature spindle surface, the position of different gap is calculated by mark current vortex sensor, the displacement signal of gained different angles is sent on eccentric azimuth measuring instrument, obtain the detection of max bend position, achieve certainty of measurement high, data are accurate, simple to operation, efficiently solve the detection maximum result existed in prior art inaccurate, the problem of complex operation inconvenience, this equipment has the simple feature of structure simultaneously, and the generation of turbine rotor bending shaft accident can be prevented and the vexed cylinder d-axis of rotor bow height point is carried out to the rotor producing interim thermal flexure in accurate instruction scene.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is rotor eccentricity azimuth measuring instrument technical scheme schematic diagram of the present utility model;
Fig. 3 is the signature tune line chart that current vortex sensor of the present utility model gathers.
In figure, 1-identifies current vortex sensor, and the eccentric azimuth measuring instrument of 2-, 3-armature spindle, 4-fore-lying device, 5-reference section, 6-monitors current vortex sensor.
Detailed description of the invention
As shown in Fig. 1 ~ Fig. 3, turbine rotor eccentric azimuth on-Line Monitor Device, it is characterized in that: comprise eccentric azimuth measuring instrument 2, mark current vortex sensor 1 and monitoring current vortex sensor 6, described eccentric azimuth measuring instrument is connected with mark current vortex sensor 1 and monitoring current vortex sensor 6 by fore-lying device 4, described mark current vortex sensor 1 probe is arranged on the position that can rotate to reference section 5 when armature spindle 3 rotates, be installed on bearing housing fixture, described monitoring current vortex sensor 6 alignment probe rotor bearing axle journal place, probe and armature spindle 3 keep the distance in current vortex sensor range ability, monitoring current vortex sensor is adopted to record the gap on probe and armature spindle surface, the position of different gap is calculated by mark current vortex sensor, the displacement signal of gained different angles is sent on eccentric azimuth measuring instrument, obtain the detection of max bend position, achieve certainty of measurement high, data are accurate, simple to operation, efficiently solve the detection maximum result existed in prior art inaccurate, the problem of complex operation inconvenience, this equipment has the simple feature of structure simultaneously, and the generation of turbine rotor bending shaft accident can be prevented and the vexed cylinder d-axis of rotor bow height point is carried out to the rotor producing interim thermal flexure in accurate instruction scene.
Described reference section 5 can adopt groove or boss, is convenient to sign mutation and manufacture, determines rotation reference zero point, to obtain the angle position of maximum eccentric point, and is convenient to manufacture.
The range of described mark current vortex sensor 1 and monitoring current vortex sensor 6 adopts more than 2mm, can meet the scope that armature spindle detects.
Described armature spindle 3 surface is 3/4ths of monitoring current vortex sensor 6 range to the probe end face distance of monitoring current vortex sensor 6, is convenient to accurate measurement, avoids data measured inaccuracy, affect testing result.
The plane of described groove or boss long and wide minimum be more than 3 times of probe diameter, be convenient to accurate measurement, avoid data measured inaccuracy, affect testing result.
Described mark current vortex sensor 1 adopts fixed support to be fixedly connected with monitoring current vortex sensor 6, fixed support adopts steel plate to make, and be provided with the hole of wearing current vortex sensor, bore dia is greater than current vortex screw rod, be fixedly connected on rotor tank wall by screw, be convenient to make and install.
Use principle: as shown in Figure 2, the gatherer process of this device, a measurement point (generally at axle head) chosen by steam turbine rotor shaft or bearing, measured rotor axle arranges a groove or convex key, key is claimed to mark mutually, when this groove or convex key forward the probe positions of mark current vortex sensor to, be equivalent to probe suddenly change with tested surface spacing, sensor can produce a pulse signal, axle often turns around, will produce a pulse signal, the timetable of generation understands that axle is in the interim position of every turn-week.Therefore compared by the gap voltage of pulse count and monitoring current vortex sensor, the phase angle of different gap size position can be determined; Key phase groove selected on mark electric vortex sensor measuring armature spindle is utilized to be " 0 " degree angle as the starting point that circumferential angle is measured, utilize key signal can measure the circumferential angle of armature spindle as benchmark, choose the gap voltage that a measurement point (generally at No. 1 bearing journal) utilizes monitoring electric vortex sensor measuring steam turbine rotor shaft simultaneously; With the id signal that key phase pulse signal rotates a circle as rotor, monitoring current vortex sensor output signal in rotor turns one week is gathered and compared, measure rotor and current vortex sensor gap voltage value, the minimum and maximum value of interrecord gap (IGP) voltage, then carry out range swithching, finally obtain the measured value of the armature spindle degree of eccentricity, simultaneously, record phase place when maximum and minimum of a value occur and show and record, obtaining data and curves figure as shown in Figure 3.
The monitoring method of turbine rotor eccentric azimuth on-Line Monitor Device, comprises the following steps:
(1) data acquisition: eccentric azimuth detector is to identifying the key signal of current vortex sensor with every T
imoment carry out gather store and to monitoring current vortex sensor eccentric signal with data X
icarry out collection to store;
(2) stabilization of speed differentiates: set generating unit speed as N(r/min), mark current vortex sensor, by triggering pulsatile once during key phase groove, works as sample frequency
one timing, it is certain that twice interpulse collection is counted, the angle of point-to-point transmission
as shown in the formula:
When measure continuously the mean error that to gather between multiple pulses and count within the scope specified time, can think that now rotor speed is in stable state, otherwise repeat step (1);
(3) extreme value judges: after stabilization of speed, can to data sequence Δ X
icarry out extreme value judgement, for monitoring current vortex sensor across interior rotor, X
iget maximum; For monitoring current vortex sensor across outer rotor, X
iminimalization, device records automatically from pulse-triggered to data sequence X
iget the total time of extreme value
;
(4) the eccentric azimuth of extreme value is determined: after completing (1), (2), (3) step, can store data carry out eccentric azimuth according to collection
calculating:
Can obtain angle position, turbine rotor eccentric angle is: be set to starting point with key phase place, and inverse steam turbine turns to rotation
-180 degree are rotor eccentricity azimuth.
The highest sample frequency of this data collecting card is 10kHz, consider device multichannel and real data disposal ability, the sample frequency scope of actual motion should be: 5kHz ~ 10kHz, can measure eccentric maximum speed is 600r/min, can obtain corresponding accessible angular resolution according to above formula is: 1.8 ° ~ 0.36 °, time on corresponding intrument between two data points is 0.005 ~ 0.0001s, based on angular resolution high like this, if the impact of other all kinds of error factor can be suppressed preferably, realize high-precision eccentric azimuth determination.
Claims (6)
1. turbine rotor eccentric azimuth on-Line Monitor Device, it is characterized in that: comprise eccentric azimuth measuring instrument (2), mark current vortex sensor (1) and monitoring current vortex sensor (6), described eccentric azimuth measuring instrument is connected with mark current vortex sensor (1) and monitoring current vortex sensor (6) by fore-lying device (4), described mark current vortex sensor (1) probe is arranged on the position that can rotate to reference section (5) when armature spindle (3) rotates, be installed on bearing housing fixture, described monitoring current vortex sensor (6) alignment probe rotor shaft bearings axle journal place, probe and armature spindle (3) face keep the distance in current vortex sensor range ability.
2. turbine rotor according to claim 1 eccentric azimuth on-Line Monitor Device, is characterized in that: described reference section (5) can adopt groove or boss.
3. turbine rotor according to claim 1 eccentric azimuth on-Line Monitor Device, is characterized in that: described mark current vortex sensor (1) and monitoring current vortex sensor (6) range adopt more than 2mm.
4. turbine rotor according to claim 1 eccentric azimuth on-Line Monitor Device, is characterized in that: described armature spindle (3) surface is 3/4ths of monitoring current vortex sensor (6) range from the probe end face distance of monitoring current vortex sensor (6).
5. turbine rotor according to claim 2 eccentric azimuth on-Line Monitor Device, is characterized in that: the plane of described groove or boss long and wide minimum be more than 3 times of probe diameter.
6. turbine rotor according to claim 1 eccentric azimuth on-Line Monitor Device, it is characterized in that: described mark current vortex sensor (1) and monitoring current vortex sensor (6) adopt fixed support to be fixedly connected with, fixed support adopts steel plate to make, be provided with the hole of wearing current vortex sensor, bore dia is greater than current vortex screw rod, is fixedly connected on rotor tank wall by screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420845607.5U CN204301683U (en) | 2014-12-29 | 2014-12-29 | Turbine rotor eccentric azimuth on-Line Monitor Device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420845607.5U CN204301683U (en) | 2014-12-29 | 2014-12-29 | Turbine rotor eccentric azimuth on-Line Monitor Device |
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| Publication Number | Publication Date |
|---|---|
| CN204301683U true CN204301683U (en) | 2015-04-29 |
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| CN201420845607.5U Active CN204301683U (en) | 2014-12-29 | 2014-12-29 | Turbine rotor eccentric azimuth on-Line Monitor Device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501714A (en) * | 2014-12-29 | 2015-04-08 | 贵州电力试验研究院 | Online monitoring device and online monitoring method for eccentric azimuth angle of steam turbine rotor |
| CN110174259A (en) * | 2019-05-05 | 2019-08-27 | 珠海格力电器股份有限公司 | Electric spindle, electric spindle monitoring method, computer device, and computer-readable storage medium |
-
2014
- 2014-12-29 CN CN201420845607.5U patent/CN204301683U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501714A (en) * | 2014-12-29 | 2015-04-08 | 贵州电力试验研究院 | Online monitoring device and online monitoring method for eccentric azimuth angle of steam turbine rotor |
| CN104501714B (en) * | 2014-12-29 | 2017-03-15 | 贵州电力试验研究院 | Turbine rotor bias azimuth on-Line Monitor Device and its monitoring method |
| CN110174259A (en) * | 2019-05-05 | 2019-08-27 | 珠海格力电器股份有限公司 | Electric spindle, electric spindle monitoring method, computer device, and computer-readable storage medium |
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