CN208537574U - The testing agency of steam turbine transmission shaft in operation - Google Patents
The testing agency of steam turbine transmission shaft in operation Download PDFInfo
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- CN208537574U CN208537574U CN201821276247.6U CN201821276247U CN208537574U CN 208537574 U CN208537574 U CN 208537574U CN 201821276247 U CN201821276247 U CN 201821276247U CN 208537574 U CN208537574 U CN 208537574U
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Abstract
The utility model relates to a kind of testing agency of steam turbine transmission shaft in operation, belong to steam turbine detection technique field, including detection plate with teeth continuously distributed on excircle, the speed measuring device for detecting detection disk rotating speed is provided on the excircle of detection plate, speed measuring device includes the first mounting plate, and the velocity sensor for detecting detection disk rotating speed is equipped on the first mounting plate；The displacement detector for detecting detection plate axial displacement is provided on the end face of detection plate, displacement detector includes mounting base, and the second mounting plate is connected in mounting base, the displacement sensor for detecting detection plate axial displacement is equipped on the second mounting plate.The design eliminates the velocity measuring shaft being connected in former design with steam turbine, effectively prevents the wear problem of velocity sensor, while reducing amount of parts, it is ensured that the stability of equipment operation extends testing agency's long service life.
Description
Technical field
The utility model relates to a kind of testing agency of steam turbine transmission shaft in operation, belong to steam turbine detection technique neck
Domain.
Background technique
In the industrial production, the equipment of part conveying hazardous fluids is needed using Steam Turbine Driven, in order to monitor vapour in real time
The operation conditions of turbine needs to carry out turbine spindle axial displacement detection and Rotating speed measring, detects revolving speed for convenience, lead to
It needs to connect a velocity measuring shaft convenient for detection revolving speed on the shaft end of turbine spindle in normal situation, be equipped on velocity measuring shaft
For detecting the detection plate of revolving speed, since the cantilever of turbine spindle is longer, shaft end increases a velocity measuring shaft again, at runtime
When, the circular runout of detection plate is excessive, to the serious wear of velocity sensor probe, causes Rotating speed measring inaccurate, works as detection
When revolving speed is lower than actual speed, steam turbine will improve revolving speed, eventually lead to overpower and shut down.
Utility model content
According to the above-mentioned deficiencies in the prior art, technical problem to be solved by the utility model is: providing a kind of steam turbine
The testing agency of transmission shaft in operation, greatly reduces the circular runout of detection plate, effectively prevents the mill of velocity sensor
Damage problem, stable equipment operation, testing agency's long service life.
The testing agency of steam turbine transmission shaft described in the utility model in operation, including continuously distributed on excircle have
The detection plate of tooth, it is characterised in that: be provided with the speed measuring device for detecting detection disk rotating speed on the excircle of detection plate, test the speed
Device includes the first mounting plate, and the velocity sensor for detecting detection disk rotating speed is equipped on the first mounting plate；In detection plate
End face on be provided with displacement detector for detecting detection plate axial displacement, displacement detector includes mounting base, peace
It is connected with the second mounting plate on dress seat, the displacement sensor for detecting detection plate axial displacement is installed on the second mounting plate.
Offer tapped through hole on further preferred first mounting plate, velocity sensor be installed in threaded hole and with
Threaded hole is set with therewith in the first nut and the second nut being threadedly engaged in being threadedly engaged on velocity sensor.
Offer annular groove corresponding with displacement sensor in the further preferred detection plate, the slot bottom of annular groove with
The center line of detection plate is perpendicular, and the flatness of annular groove slot bottom is less than 0.03mm.
The adjusting for adjusting spacing between the second mounting plate and detection plate is offered in the further preferred mounting base
Slot, the second mounting plate pass through regulating tank by bolt and are fixed in mounting base.
The further preferred velocity sensor uses magnetic resistance speed sensor.
Further preferred institute's displacement sensors use eddy current displacement sensor.
Compared with prior art, the utility model has the following beneficial effects:
By the testing agency of steam turbine transmission shaft described in the utility model in operation, the design eliminates former design
In the velocity measuring shaft that is connected with steam turbine, be changed to the detection plate for only detecting axial displacement that can either detect axial displacement, and energy
The speed detector for enough detecting revolving speed, greatly reduces the circular runout of detection plate, effectively prevents the mill of velocity sensor
Damage problem, while reducing amount of parts, it is ensured that the stability of equipment operation extends testing agency's long service life.
Detailed description of the invention
The structural schematic diagram of Fig. 1 the utility model；
The structural schematic diagram of Fig. 2 axial direction testing agency；
Scheme of installation of Fig. 3 detection device in steam turbine；
In figure: 1, velocity sensor 2, the first nut 3, the second nut 4, the first mounting plate 5, detection plate 5.1, ring
Shape slot 6, displacement sensor 7, the second mounting plate 8, mounting base 9, front bearing box lower case 10, main shaft.
Specific embodiment
The utility model is described further with reference to the accompanying drawing:
Below by way of specific embodiment, the utility model is described in further detail, but not to limit the utility model, all
Within the spirit of the present invention and principle, it is practical new to should be included in this for any modification, equivalent replacement, improvement and so on
Within the protection scope of type.
Embodiment
As shown in Figure 1, Figure 2, Figure 3 shows, the testing agency of the steam turbine transmission shaft in operation, including on excircle continuously
It is distributed detection plate 5 with teeth, the speed measuring device for detecting 5 revolving speed of detection plate is provided on the excircle of detection plate 5, test the speed dress
It sets including the first mounting plate 4, the velocity sensor 1 for detecting 5 revolving speed of detection plate is installed on the first mounting plate 4；It is detecting
The displacement detector for detecting 5 axial displacement of detection plate is provided on the end face of disk 5, displacement detector includes mounting base
8, the second mounting plate 7 is connected in mounting base 8, and the displacement for detecting 5 axial displacement of detection plate is installed on the second mounting plate 7
Sensor 6.In the structural design scheme, the profile of the first mounting plate 4 is semicircular structure, the center line of the first mounting plate 4 with
For the center line of detection plate 5 on same straight line, this structure design ensure that tooth top and the sensing that each tests the speed in detection plate 5
The probe spacing of device 1 is equal, keeps tachometric survey more acurrate；The mounting structure of displacement sensor 6 is simple, is conveniently replaceable.
In the present embodiment, tapped through hole is offered on first mounting plate 4, velocity sensor 1 is installed in threaded hole
And with threaded hole in being threadedly engaged, it is set on velocity sensor 1 therewith in the first nut 2 and the second nut being threadedly engaged
3.As shown in Figure 1, velocity sensor 1, by being threadedly engaged in the threaded hole being installed on the first mounting plate 4, the structure is convenient for tune
The radial depth of velocity sensor 1 is saved, the first nut 2 and the second nut 3 being set on velocity sensor 1 test the speed for fastening
Sensor 1, is also possible to prevent velocity sensor 1 and the threaded connection of the threaded hole on the first mounting plate 4 loosens.First spiral shell
Mother 2 and the second nut 3 are arranged in the outside of the first mounting plate 4, facilitate adjusting.
First nut 2 and the second nut 3 can be arranged in the inside of the first mounting plate 4.
It can also be that the first nut 2 is arranged in the inside of the first mounting plate 4, the second nut 3 is arranged in the first mounting plate 4
Outside.
Annular groove 5.1 corresponding with displacement sensor 6, the slot bottom of annular groove 5.1 and inspection are offered in the detection plate 5
The center line for surveying disk 5 is perpendicular, and the flatness of 5.1 slot bottom of annular groove is less than 0.03mm.When displacement sensor 6 works, pass through it
Probe is detected at a distance from detection plate 5, it is desirable that the end face of the corresponding detection plate 5 of displacement sensor 6 reaches wanting for flatness
It asks, annular groove 5.1 is set on the end face of detection plate 5, reduces the requirement to the entire end face plane degree of detection plate 5, also reduces
Processing capacity and difficulty of processing.
Offer the regulating tank for adjusting spacing between the second mounting plate 7 and detection plate 5 in the mounting base 8, second
Mounting plate 7 passes through regulating tank by bolt and is fixed in mounting base 8.As shown in Fig. 2, structure design can be by adjusting second
The axial displacement of mounting plate 7 adjusts the distance between displacement sensor 6 and detection plate 5, to reduce to axial detection dress
Set the installation requirement of axial position.
The velocity sensor 1 uses magnetic resistance speed sensor, and the sensor is easy for installation, and detection accuracy is high, the service life
It is long.
Institute's displacement sensors 6 use eddy current displacement sensor, and the sensor is easy for installation, strong antijamming capability.
As shown in Figure 1, during installation, detection plate 5 is mounted on main shaft 10, the first mounting plate 4 is mounted on front bearing box
In lower case 9, velocity sensor 1 is mounted in the threaded hole of the first mounting plate 4, is adjusted according to the height of 5 tooth top of detection plate
The radial depth of whole velocity sensor 1, the number of teeth is 60 teeth in detection plate 5, and the quantity of velocity sensor 1 is 9, wherein 3 surveys
Fast sensor 1 is controlled for overspeed protection, and 3 velocity sensors 1 are used for for overpower protection control, 1 velocity sensor 1
On-site supervision, remaining 2 velocity sensor 1 be it is spare, after installing to velocity sensor 1 be powered；Displacement sensor 6 is vertical
It is mounted on the second mounting plate 7 in the annular groove 5.1 of detection plate 5, the second mounting plate 7 is bolted in mounting base 8, peace
Dress seat 8 is fixed in front bearing box lower case 9, and displacement is adjusted at a distance from 5 end face of detection plate by adjusting the second mounting plate 7
Sensor 6 is powered after adjusting to displacement sensor 6 at a distance from annular groove 5.1；
When operation, 5 high speed rotation of detection plate, the iron core gap corresponded on tooth top and velocity sensor 1 in detection plate 5 is sent out
Raw periodically variation, to generate the frequency of induced potential, when the number of teeth in detection plate 5 is 60, velocity sensor 1 is exported
Revolving speed is equal with actual speed；The magnetic field that alternation can be generated in the coil of the probe head of displacement sensor 6, when tested metal
Close to magnetic field, induced current will be generated in metal surface, metal surface can generate and 6 side of probe of displacement sensor at the same time
To opposite alternating magnetic field, be changed the phase of 6 head coil of displacement sensor, 6 output signal of displacement sensor it is big
The small spacing between tested metal surface and change, the axial displacement of final output detection plate 5.
The advantages of basic principles and main features and the utility model of the utility model have been shown and described above.This
The technical staff of industry is retouched in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
That states only illustrates the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model
It will also have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.This is practical new
Type is claimed range and is defined by the appending claims and its equivalent thereof.
Claims (6)
1. a kind of testing agency of steam turbine transmission shaft in operation, including detection plate (5) with teeth continuously distributed on excircle,
It is characterized by: being provided with the speed measuring device for detecting detection plate (5) revolving speed, speed measuring device on the excircle of detection plate (5)
Including the first mounting plate (4), the velocity sensor (1) for detecting detection plate (5) revolving speed is installed on the first mounting plate (4)；
The displacement detector for detecting detection plate (5) axial displacement, displacement detector are provided on the end face of detection plate (5)
It including mounting base (8), is connected with the second mounting plate (7), is equipped on the second mounting plate (7) for detecting inspection in mounting base (8)
Survey the displacement sensor (6) of disk (5) axial displacement.
2. the testing agency of steam turbine transmission shaft according to claim 1 in operation, it is characterised in that: first peace
Tapped through hole is offered in loading board (4), velocity sensor (1) is installed in threaded hole and with threaded hole in being threadedly engaged, is surveying
It is set on fast sensor (1) therewith in the first nut (2) and the second nut (3) being threadedly engaged.
3. the testing agency of steam turbine transmission shaft according to claim 1 in operation, it is characterised in that: the detection plate
(5) annular groove (5.1) corresponding with displacement sensor (6), slot bottom and detection plate (5) of annular groove (5.1) are offered on
Center line is perpendicular, and the flatness of annular groove (5.1) slot bottom is less than 0.03mm.
4. the testing agency of steam turbine transmission shaft according to claim 1 in operation, it is characterised in that: the mounting base
(8) regulating tank for adjusting spacing between the second mounting plate (7) and detection plate (5) is offered on, the second mounting plate (7) passes through
Bolt passes through regulating tank and is fixed on mounting base (8).
5. the testing agency of steam turbine transmission shaft according to claim 2 in operation, it is characterised in that: the biography that tests the speed
Sensor (1) uses magnetic resistance speed sensor.
6. the testing agency of steam turbine transmission shaft according to claim 3 in operation, it is characterised in that: the displacement passes
Sensor (6) uses eddy current displacement sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821276247.6U CN208537574U (en) | 2018-08-06 | 2018-08-06 | The testing agency of steam turbine transmission shaft in operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821276247.6U CN208537574U (en) | 2018-08-06 | 2018-08-06 | The testing agency of steam turbine transmission shaft in operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208537574U true CN208537574U (en) | 2019-02-22 |
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ID=65378377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821276247.6U Active CN208537574U (en) | 2018-08-06 | 2018-08-06 | The testing agency of steam turbine transmission shaft in operation |
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| Country | Link |
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| CN (1) | CN208537574U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945055A (en) * | 2019-03-21 | 2019-06-28 | 华能澜沧江水电股份有限公司 | A kind of huge hydroelectric power plant's circle fluted disc holes probe bracket |
| CN113944548A (en) * | 2020-07-16 | 2022-01-18 | 宝山钢铁股份有限公司 | Method for improving reliability of single-shaft shafting function of gas turbine combined cycle unit |
-
2018
- 2018-08-06 CN CN201821276247.6U patent/CN208537574U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945055A (en) * | 2019-03-21 | 2019-06-28 | 华能澜沧江水电股份有限公司 | A kind of huge hydroelectric power plant's circle fluted disc holes probe bracket |
| CN113944548A (en) * | 2020-07-16 | 2022-01-18 | 宝山钢铁股份有限公司 | Method for improving reliability of single-shaft shafting function of gas turbine combined cycle unit |
| CN113944548B (en) * | 2020-07-16 | 2022-09-20 | 宝山钢铁股份有限公司 | Method for improving reliability of single-shaft shafting function of gas turbine combined cycle unit |
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