CN105758513A - Water-cooling machine set shaft vibration measuring sensor - Google Patents
Water-cooling machine set shaft vibration measuring sensor Download PDFInfo
- Publication number
- CN105758513A CN105758513A CN201610236253.8A CN201610236253A CN105758513A CN 105758513 A CN105758513 A CN 105758513A CN 201610236253 A CN201610236253 A CN 201610236253A CN 105758513 A CN105758513 A CN 105758513A
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- Prior art keywords
- sleeve
- displacement measuring
- axle
- spring
- measuring staff
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/02—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by magnetic means, e.g. reluctance
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention provides a water-cooling machine set shaft vibration measuring sensor, the sensor comprises a contact probe formed by coaxially connecting a contact, a connecting rod shaft, a displacement measuring rod shaft in sequence, a push rod is coaxially arranged on the rear of the displacement measuring rod shaft, a eddy current probe is coaxially arranged on the front end of the push rod, and an interval is arranged between the eddy current probe and the tail end of the displacement measuring rod shaft; a first spring sleeves the front segment of the displacement measuring rod shaft externally, a second spring sleeves the rear segment of the displacement measuring rod shaft externally, and the first spring rear end is isolated and spaced from the second spring front end by a block; a sliding block for spacing the second spring rear end is arranged on the periphery of the push rod front end, and an adjusting bolt for adjusting the interval between the eddy current probe and the displacement measuring rod shaft is arranged on the tail of the push rod; and the sensor also comprises a housing. According to the invention, the sensor can shield an interference signal and effectively measure a shaft vibration signal; the mounting of the sensor is convenient and fast, so that the working efficiency is improved; the sensor has an insulating design, so that the service life is prolonged; the contact of the sensor is detachable and is easy to change, the damage cost is reduced, and the product cost performance is improved.
Description
Technical field
The present invention relates to a kind of suitable in water-cooled generator encourage end bearing shell axle shake measure sensor.
Background technology
Generating set is the heart of power plant, and its installation quality directly influences the economic benefit of power plant.The axle of the electromotor numerical value that shakes is always up the index that the operating need of generating set strictly control, and directly influences the safe operation of unit.Therefore must in the installation process of unit, by necessary mounting process measure, the axle controlling unit shakes value within excellent.
Due to the reason on product structure, (generator rotor cooling water passes through 135MW, 300MW double-water internal cooling unit that Shanghai electromotor factory produces from centre bore; magnetic excitation wires passes through from eccentric orfice); encourage with eddy current probe measurement and spurious signal (general 200 μm) when end bearing axle shakes, can be caused; can disturb what unit safety operation monitored to be normally carried out, cause that disorderly closedown often occurs in unit.
The technology that existing measurement axis is shaken is the structure adopting contact transition sleeve, makes eddy current probe avoid changes of magnetic field region.But due to every electromotor installation data in installation process be all not quite similar, slightly deviation, therefore existing product structure is inconvenient to install, and can only single use, just scrap renewal after contact head abrasion, it is useless that to damage cost big.Directly can not contact with rotating shaft additionally, due to eddy current probe, it does not have effectively mounting means measures the vibration information of alternator shaft reliably；Owing to the operating mode that double water innercooling electric generator rotor structure feature is different can produce different interference of electromagnetic field signals in electromotor real work, producing false signal, how effectively to overcome, reaching accurate measurement is also a difficult point.Meanwhile, the naked structure of contact transition sleeve own, easily because shaft current produces galvano-cautery, increase probe wear damage.
Summary of the invention
The technical problem to be solved in the present invention is how effectively to shield water-cooled generator to encourage the interference signal holding the axle of bearing shell to shake when measuring, and vibration signal is accurately and reliably transferred to supervisory instrument；And huge useless damage Cost Problems changed by whole vialog after probe abrasion.
In order to solve above-mentioned technical problem, the technical scheme is that a kind of water chiller of offer surveys axle vibration sensor, it is characterized in that: include the contact probe sequentially coaxially connected to form by contact, pitman shaft, displacement measuring staff axle, push rod is with being located in displacement measuring staff axle rear, push rod front end is coaxially provided with eddy current probe, is provided with gap between eddy current probe and displacement measuring staff shaft end；
It is cased with the first spring outside displacement measuring staff axle leading portion, is cased with the second spring outside displacement measuring staff axle back segment, is isolated by block and spacing between the first spring rear end and the second spring at front end；Periphery, push rod front end is provided with for the second spring rear end carries out spacing slide block, and push rod afterbody is provided with the adjusting bolt for regulating the gap between eddy current probe and displacement measuring staff axle；
First spring outer, coaxial is provided with the first sleeve, and the first barrel forward end extends to outside pitman shaft；Second spring outer, coaxial is provided with the second sleeve, and the second barrel forward end is connected with first set tube rear end；Push rod outer, coaxial is provided with the 3rd sleeve, and the 3rd barrel forward end is connected with the second sleeve rear end.
Preferably, the hardness ratio water chiller rotating shaft material of described contact is low.
Preferably, described pitman shaft is insulating part.
Preferably, described pitman shaft is insulating part.
Preferably, described displacement measuring staff axle is for being converted into length travel signal by the vibration signal of water chiller electromotor, and described displacement measuring staff shaft end sectional area ratio eddy current probe is big.
Preferably, described displacement measuring staff shaft end sectional area is 2 times of eddy current probe.
Preferably, described second barrel forward end is threadeded with first set tube rear end, and partial threads junction adopts and glueds joint.
Preferably, described 3rd barrel forward end is threadeded with the second sleeve rear end, and partial threads junction adopts and glueds joint.
Preferably, described current vortex sensor for being converted into digital signal by vibration signal, and is shown to display device by corresponding fore-lying device transmission, completes the supervision to vibration data.
Preferably, described first sleeve, the first spring, block, the second sleeve, the second spring, slide block, the 3rd sleeve, displacement measuring staff axle are stainless steel.
Water chiller provided by the invention is surveyed axle vibration sensor and is adopted combined probe, and it is applicable to the rotating shaft that the magnetic characteristic change of circumference material is prolonged on axle surface.During measurement, outer sleeve is fixed on bearing block, contact probe probe head vertical with tested rotating shaft is pressed in rotating shaft with rational thrust, contact is pressed in sleeve, contact is contacted with displacement measuring staff axle by pitman shaft, vibration signal is passed to by displacement measuring staff axle the eddy current probe of inside, it is diamagnetic material because of displacement measuring staff shaft housing material and eddy current probe leaves rotating shaft surface and has certain distance, avoid the electricity because of electromagnetic action and rotating shaft material, magnetic characteristic change and cause usual eddy current probe produced spurious signal when measuring, effectively will disturb Signal separator, retain real vibration signal.
Compared to existing technology, water chiller provided by the invention survey axle vibration sensor has the advantages that
1, can shielding interference signal, the axle of effectively measuring double water innercooling electric generator bearing shakes signal, has ensured the stable operation of electromotor；
2, devise the fine tuning structure being easily installed debugging, it is possible to install conveniently and efficiently, improve work efficiency；
3, structure adds insulating Design, improve the service life of vibration-measuring sensor；
4, contact is designed to removable, it is simple to changes, reduces the useless damage cost after abrasion, improve the cost performance of product.
Accompanying drawing explanation
The water chiller that Fig. 1 provides for the present embodiment surveys axle vibration sensor structural representation.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is expanded on further.Should be understood that these embodiments are merely to illustrate the present invention rather than restriction the scope of the present invention.In addition, it is to be understood that after having read the content that the present invention lectures, the present invention can be made various changes or modifications by those skilled in the art, and these equivalent form of values fall within the application appended claims limited range equally.
Fig. 1 surveys axle vibration sensor structural representation for the water chiller that the present embodiment provides, and described water chiller is surveyed axle vibration sensor and is made up of contact probe, first sleeve the 2, first spring 3, block the 4, second sleeve the 5, second spring 6, eddy current probe 7, slide block 8, push rod 9, the 3rd sleeve 10, adjusting bolt 11 etc..
Contact probe is made up of three parts:
1, contact 1, for bearing alloy material, hardness ratio rotating shaft material is low, effect: even if vibrating excessive during electromotor work itself, without due to probe and shaft contacts and rotating shaft of wearing and tearing, cause bigger economic loss；
2, pitman shaft 12, for polysulfone material, effect: play insulating effect, it is prevented that shaft current is directly connected into coupling probe by contact surface, stops galvano-cautery phenomenon.
3, displacement measuring staff axle 13, for Cr18Ni10,304 stainless steel materials, effect: transmission vibration information, is converted into length travel signal by the vibration signal of electromotor, and its end section area is eddy current probe 2 times, expand the induction area of current vortex sensor, improve the precision of sensor measurement.
Contact 1, pitman shaft 12, displacement measuring staff axle 13 sequentially coaxially connect, and push rod 9 and displacement measuring staff axle 13 are coaxially disposed, and push rod 9 front end is provided with eddy current probe 7, is provided with gap between eddy current probe 7 and displacement measuring staff axle 13 rear end.Periphery, push rod 9 front end is provided with slide block 8, it is cased with the first spring 3 outside displacement measuring staff axle 13 leading portion, being cased with the second spring 6 outside displacement measuring staff axle 13 back segment, isolated and spacing by block 4 between the first spring 3 rear end and the second spring 6 front end, the second spring 6 rear end is spacing by slide block 8.Push rod 9 afterbody is provided with adjusting bolt 11.
First spring 3 outer, coaxial is provided with the first sleeve 2, and the first sleeve 2 front end extends to outside pitman shaft 13；Second spring 6 outer, coaxial is provided with the second sleeve 5, threadeds with the first sleeve 2 rear end in the second sleeve 5 front end, and partial threads junction adopts happy safe glue to glued joint；Push rod 9 outer, coaxial is provided with the 3rd sleeve 10, threadeds with the second sleeve 5 rear end in the 3rd sleeve 10 front end, and partial threads junction adopts happy safe glue to glued joint.
First sleeve 2, for Cr18Ni10,304 stainless steel materials, effect: equipment necessary installed part when this part is for installing.
First spring 3, for Cr18Ni10,304 stainless steel materials, effect: transmission length travel signal
Block 4, for Cr18Ni10,304 stainless steel materials, effect: spring is installed must structural member.
Second sleeve 5, for Cr18Ni10,304 stainless steel materials, effect: equipment necessary installed part when this part is for installing.
Second spring 6, for Cr18Ni10,304 stainless steel materials, effect: regulate the certainty of measurement of sensor.
Current vortex sensor 7, for the sensor such as Bentley, EPRO, VM, is converted into vibration signal digital signal and is shown by corresponding fore-lying device transmission to display gauge head or be connected into DCS and show, complete the supervision to vibration data.
Slide block 8, for Cr18Ni10,304 stainless steel materials, effect: spring is installed must structural member
Push rod 9, for 5052-H112 aluminum alloy materials, effect: the vibration signal of electromotor is converted into length travel signal.
3rd sleeve 10, for Cr18Ni10,304 stainless steel materials, effect: equipment necessary installed part when this part is for installing.
Adjusting bolt 11: for 5052-H112 aluminum alloy materials, effect: dimensional discrepancy during due to every electromotor installation, this part can be finely tuned, and makes complete equipment reach to measure required precision.
Mounting structure all adopts antimagnetic material, effectively prevents the magnetic interference produced during generator operation.
The water chiller that the present embodiment provides is surveyed axle vibration sensor and is adopted combined probe (contact probe+eddy current probe 7), and it is applicable to the rotating shaft that the magnetic characteristic change of circumference material is prolonged on axle surface.During measurement, outer sleeve 2, 5, 10 are fixed on bearing block, contact probe probe head vertical with tested rotating shaft is pressed in rotating shaft with rational thrust, contact is pressed in sleeve, contact 1 is contacted with displacement measuring staff axle 13 by pitman shaft 12, vibration signal is passed to by displacement measuring staff axle 13 eddy current probe 7 of inside, it is diamagnetic material because of displacement measuring staff axle 13 sheathing material and eddy current probe 7 leaves rotating shaft surface and has certain distance, avoid the electricity because of electromagnetic action and rotating shaft material, magnetic characteristic change and cause usual eddy current probe produced spurious signal when measuring, effectively will disturb Signal separator, retain real vibration signal.
Adjusting bolt 11 by push rod 9 afterbody, it is possible to current vortex sensor gap voltage is finely tuned；First sleeve 2 has with the second sleeve 5 threadeds, and scalable surveys the length of axle vibration sensor, solves due to installation process large deviations problem.Sensor front end has insulating part, it is to avoid is produced the front end tungsten golden head galvano-cautery phenomenon caused by shaft current, solves the phenomenon that probe is easy to wear.The detachable property of contact parts, after solving probe abrasion, huge useless damage Cost Problems changed by whole vialog.
Claims (9)
1. a water chiller surveys axle vibration sensor, it is characterized in that: include the contact probe sequentially coaxially connected to form by contact (1), pitman shaft (12), displacement measuring staff axle (13), push rod (9) is with being located in displacement measuring staff axle (13) rear, push rod (9) front end is coaxially provided with eddy current probe (7), is provided with gap between eddy current probe (7) and displacement measuring staff axle (13) end；
It is cased with the first spring (3) outside displacement measuring staff axle (13) leading portion, it is cased with the second spring (6) outside displacement measuring staff axle (13) back segment, is isolated and spacing by block (4) between the first spring (3) rear end and the second spring (6) front end；Push rod (9) periphery, front end is provided with for the second spring (6) rear end carries out spacing slide block (8), and push rod (9) afterbody is provided with the adjusting bolt (11) for regulating the gap between eddy current probe (7) and displacement measuring staff axle (13)；
First spring (3) outer, coaxial is provided with the first sleeve (2), and the first sleeve (2) front end extends to pitman shaft (13) outside；Second spring (6) outer, coaxial is provided with the second sleeve (5), and the second sleeve (5) front end is connected with the first sleeve (2) rear end；Push rod (9) outer, coaxial is provided with the 3rd sleeve (10), and the 3rd sleeve (10) front end is connected with the second sleeve (5) rear end.
2. a kind of water chiller as claimed in claim 1 surveys axle vibration sensor, it is characterised in that: the hardness ratio water chiller rotating shaft material of described contact (1) is low.
3. a kind of water chiller as claimed in claim 1 surveys axle vibration sensor, it is characterised in that: described pitman shaft (12) is insulating part.
4. a kind of water chiller as claimed in claim 1 surveys axle vibration sensor, it is characterized in that: described displacement measuring staff axle (13) is for being converted into length travel signal by the vibration signal of water chiller electromotor, and described displacement measuring staff axle (13) tail end section is long-pending bigger than eddy current probe (7).
5. a kind of water chiller as claimed in claim 4 surveys axle vibration sensor, it is characterised in that: described displacement measuring staff axle (13) tail end section amasss 2 times into eddy current probe (7).
6. a kind of water chiller as claimed in claim 1 surveys axle vibration sensor, it is characterised in that: threaded with the first sleeve (2) rear end in described second sleeve (5) front end, and partial threads junction adopts and glueds joint.
7. a kind of water chiller as claimed in claim 1 surveys axle vibration sensor, it is characterised in that: threaded with the second sleeve (5) rear end in described 3rd sleeve (10) front end, and partial threads junction adopts and glueds joint.
8. a kind of water chiller as claimed in claim 1 surveys axle vibration sensor, it is characterized in that: described current vortex sensor (7) is for being converted into digital signal by vibration signal, and shown to display device by corresponding fore-lying device transmission, complete the supervision to vibration data.
9. a kind of water chiller as claimed in claim 1 surveys axle vibration sensor, it is characterised in that: described first sleeve (2), the first spring (3), block (4), the second sleeve (5), the second spring (6), slide block (8), the 3rd sleeve (10), displacement measuring staff axle (13) are stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610236253.8A CN105758513B (en) | 2016-04-15 | 2016-04-15 | A kind of water chiller survey axis vibration sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610236253.8A CN105758513B (en) | 2016-04-15 | 2016-04-15 | A kind of water chiller survey axis vibration sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105758513A true CN105758513A (en) | 2016-07-13 |
| CN105758513B CN105758513B (en) | 2018-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610236253.8A Active CN105758513B (en) | 2016-04-15 | 2016-04-15 | A kind of water chiller survey axis vibration sensor |
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| Country | Link |
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| CN (1) | CN105758513B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167840A (en) * | 2017-06-14 | 2017-09-15 | 四川大学 | A kind of microseismic sensors of recyclable reuse |
| RU2792745C1 (en) * | 2022-09-14 | 2023-03-23 | Общество С Ограниченной Ответственностью "Башкирская Генерирующая Компания" ("Ооо "Бгк") | Stationary system for measuring vibration parameters of contact rings of turbogenerator brush-contact apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202013203U (en) * | 2011-03-07 | 2011-10-19 | 南通大通宝富风机有限公司 | Conversion device of sensor probe |
| CN102901437A (en) * | 2012-10-11 | 2013-01-30 | 安徽科航自动化仪器有限公司 | Integrated eddy current displacement sensor |
| CN203848931U (en) * | 2014-05-19 | 2014-09-24 | 国家电网公司 | Steam turbine bearing vibration on-line measurement device |
| CN205620022U (en) * | 2016-04-15 | 2016-10-05 | 上海微程电气设备有限公司 | Water -cooled generator group surveys axle sensor that shakes |
-
2016
- 2016-04-15 CN CN201610236253.8A patent/CN105758513B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202013203U (en) * | 2011-03-07 | 2011-10-19 | 南通大通宝富风机有限公司 | Conversion device of sensor probe |
| CN102901437A (en) * | 2012-10-11 | 2013-01-30 | 安徽科航自动化仪器有限公司 | Integrated eddy current displacement sensor |
| CN203848931U (en) * | 2014-05-19 | 2014-09-24 | 国家电网公司 | Steam turbine bearing vibration on-line measurement device |
| CN205620022U (en) * | 2016-04-15 | 2016-10-05 | 上海微程电气设备有限公司 | Water -cooled generator group surveys axle sensor that shakes |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167840A (en) * | 2017-06-14 | 2017-09-15 | 四川大学 | A kind of microseismic sensors of recyclable reuse |
| CN107167840B (en) * | 2017-06-14 | 2023-09-19 | 四川大学 | Recyclable and reusable microseismic sensor |
| RU2792745C1 (en) * | 2022-09-14 | 2023-03-23 | Общество С Ограниченной Ответственностью "Башкирская Генерирующая Компания" ("Ооо "Бгк") | Stationary system for measuring vibration parameters of contact rings of turbogenerator brush-contact apparatus |
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| Publication number | Publication date |
|---|---|
| CN105758513B (en) | 2018-08-28 |
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