CN110319919A - A kind of loosening method of discrimination applied to blower mixed mud basis - Google Patents
A kind of loosening method of discrimination applied to blower mixed mud basis Download PDFInfo
- Publication number
- CN110319919A CN110319919A CN201810270152.1A CN201810270152A CN110319919A CN 110319919 A CN110319919 A CN 110319919A CN 201810270152 A CN201810270152 A CN 201810270152A CN 110319919 A CN110319919 A CN 110319919A
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- China
- Prior art keywords
- blower
- phase difference
- bearing block
- load side
- vibration
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- 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.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
Abstract
The present invention relates to a kind of loosening method of discrimination applied to blower mixed mud basis, belong to vibration detection and fault diagnosis technology field.This method executes following steps: 1) installing equipment；2) survey calculation phase difference, and record；3) compare the size of vibration speed value；Preliminary loosen is carried out to judge；4) compare phase difference to determine the case where shaft coupling two sides are misaligned with the presence or absence of angle；5) dynamic balancing is done to blower according to dynamic balance method, if plus counterweight angle changing, illustrate that bearing block center of gravity is being drifted about；If 6) tested bearing block exists simultaneously step 3) -5) in situation; it then can be determined that there is a problem of that loosening or place mat are not firm in the concrete foundation of bearing block; it needs to shut down, hangs the machine rotor that blows in, shell and bearing block, blower foundation is done and pours processing again.The present invention utilizes vibration amplitude, and in conjunction with the phase difference relationship and dynamic balancing between blower and motor, the concrete foundation of comprehensive descision blower is with the presence or absence of loosening or cavity.
Description
Technical field
The present invention relates to a kind of loosening method of discrimination applied to blower mixed mud basis, belong to vibration detection and examine with failure
Disconnected technical field.
Background technique
The axis of main exhauster is mounted on the bearing support at axis both ends by two, and bearing uses the self-adjusting spherical surface of forced feed lubrication
Sliding bearing.Bearing close to motor side is between two thrust discs, to blower fan main shaft axially position.The bearing of anti-drive end is
Non-locating, to adapt to the thermal expansion that main shaft generates since temperature raises.Main exhausting operating status is unstable always, repeatedly occurs
Vibration values meet or exceed alarming value, seriously affect the safety in production of sintering.The axial vibration value of two measuring points of blower has fluctuation,
Especially blower load side axial vibration value more all directions vibration values are stablized, although axial slightly fluctuate, also acceptable
In range.Blower load side axial vibration value deteriorates suddenly, is constantly in higher level later, maximum value reaches 9.11mm/s.
The vibration amplitude of collection in worksite, spectrum feature are obvious, focus on blower foundation loosening.
Bearing fan is located on rigid coagulating cement earth foundation together with bracket.Hang the machine rotor that leaks out, bearing block is
One difficult task may require that sintering production halt production week age.It needs to make a definite diagnosis blower foundation to go wrong, inspection could be arranged
Repair the time pours adjustment processing one to basis again, need to establish new base flexible cause bearing block vibration it is big it is theoretical according to
According to.
Summary of the invention
The technical problem to be solved by the present invention is in view of the shortcomings of the prior art, propose a kind of applied to blower mixed mud base
The loosening method of discrimination of plinth.
In order to solve the above-mentioned technical problem technical solution that the present invention proposes is: base flexible causes vibration of bearings exceeded
Detection method, execute following steps:
1) equipment is installed；
2) level-level of binary channels vibration measurement instrument measurement two side shaft holder of blower, vertical-vertical, axial-axial mutual is utilized
Between phase difference, test blower load side horizontal vertical phase difference, test motor load side level-blower load side is horizontal,
Motor load side is vertical-and blower load side is vertical, motor load side axle is to the phase difference between-blower load side axial direction；It goes forward side by side
Row record；
3) compare all directions four direction in bearing block, seat support, bracket bottom plate or the one of plane of concrete foundation
Measurement point vibration speed value size, then compare the big of the vibration speed value of the measurement point of Different Plane in same direction
It is small；The vibration speed value of a measurement point and the vibration speed value of other coplanar three measurement points of the measurement point if it exists
First difference is all larger than the first preset threshold, then further relatively exists in the same direction and not with the measurement point with the measurement point
Second difference of other three measurement points on same plane, if second difference is all larger than the second preset value, the measurement
Exist at point and loosens；
4) further compare blower, motor two sides phase difference, if the motor load side level-blower load side level phase
Difference is reversed, the motor load side is vertical-and the vertical phase difference of blower load side is reversed, the motor load side axle is to-blower
Bearing block level-horizontal phase difference of reversed, the described shaft coupling two sides of load side axial direction phase difference is reversed, the shaft coupling two sides
Bearing block it is vertical-vertical phase difference is reversed or axial-axial phase difference of bearing block of the shaft coupling two sides is reversed, then can sentence
Shaft coupling two sides exist reversed between power machine, blower, and shaft coupling two sides angle misaligns；
It is in phase difference ± 30 ° in the same direction, 180 ° ± 30 ° of phase difference are reversed；5) it shuts down, after shutting down, restarts, and utilize vibration
The dynamic balancing function of dynamic analyzer, does dynamic balancing to blower according to dynamic balance method, if plus counterweight angle changing, illustrate
Bearing block center of gravity is being drifted about；
If 6) tested bearing block exists simultaneously step 3) -5) in situation, can be determined that the concrete foundation of bearing block
There is a problem of loosening or place mat is not firm, needs to shut down, hang the machine rotor that blows in, shell and bearing block, blower foundation is done and is poured again
Build processing.
The improvement of above-mentioned technical proposal: it in step 1), installs on vibration probe to bearing block, rotational speed probe is mounted on rack
On, and the sensitive film in corresponding rotary shaft.
The improvement of above-mentioned technical proposal: it by adjusting vibration probe position, successively acquires from top to bottom each in all directions
On direction under identical operating condition, bearing block, seat support, bracket bottom plate, the vibration speed value of concrete foundation position and record.
The beneficial effect of the present invention by adopting the above technical scheme is: the present invention utilizes vibration amplitude, in conjunction with blower and motor
Between phase difference relationship and dynamic balancing, the concrete foundation of comprehensive descision blower is with the presence or absence of loosening or cavity；It is more important
, the method achieve by externally measured data, in the case where not destroying original structure, positioning, which exists, to be loosened or cavity
Position provides reasonable direction for repair, saves the investigation time.
Detailed description of the invention
The present invention will be further explained below with reference to the attached drawings.
Fig. 1 is the schematic view of the mounting position of the blower unit and part measurement original part in the embodiment of the present invention.
Fig. 2 is the measuring point distribution map in the embodiment of the present invention.
Fig. 3 is the schematic diagram data of each measuring point in the embodiment of the present invention.
Detailed description of the invention: concrete foundation 1, bottom plate 2, bracket 3, bearing block 4, motor shaft 5, motor 6, left side vibration measuring probe 7,
Rotational speed probe 8, intermediate shaft coupling 9, right side vibration measuring probe 10, blower 11, vibration analyzer 12.
Specific embodiment
Embodiment
A kind of loosening method of discrimination applied to blower mixed mud basis of the present embodiment executes following steps:
1) equipment is installed, as shown in Figure 1, 2, is installed on vibration probe to bearing block, rotational speed probe is mounted on the rack, and corresponding
Sensitive film in rotary shaft.By adjusting vibration probe position, successively acquire from top to bottom identical in all directions of all directions
Under operating condition, bearing block, seat support, bracket bottom plate, the vibration speed value of concrete foundation position and record.
This blower is connect with motor by intermediate shaft coupling, and blower both ends, motor two end axles are mounted on bearing block, wind
Mechanical, electrical machine respectively has two sleeve-bearings.Bearing block is mounted on bearing bracket by bolt, and bearing bracket is mounted on bottom plate
On, bottom plate is fixed in concrete foundation by foundation bolt.When production, motor rotation drives draught fan impeller to turn by shaft coupling
It is dynamic, to complete the fluid conveying in production.When vibration detection is analyzed, vibration analyzer is placed in operating on blower side, double
The connecting line on a vibration probe left side, the vibration probe right side is plugged in channel respectively, and vibration probe measures motor bearing seat vibration velocity respectively,
Then motor bearings at both ends seat support, bracket bottom plate are sequentially arranged at, in concrete foundation peripheral direction, successively measures each position
Set vibration speed value.Vibration probe measures blower side shaft holder, bracket, bottom plate, concrete foundation vibration speed value respectively.
Scene is operated in blower, vibration probe, the rotational speed probe of in-site installation vibration analyzer are popped one's head in successively using two
Measure bearing block (measuring point 1,2,3,4), bracket (measuring point 11,22,33,44), bottom plate (measuring point 111,222,333,444), coagulation
Earth foundation (measuring point 1111,2222,3333,4444) vibration speed value simultaneously records, using dual probe compare measuring point 1,11,111,
Phase difference and record between 1111.
2) using level-level of binary channels vibration measurement instrument measurement two side shaft holder of blower, it is vertical-vertical, axial-axially
Mutual phase difference tests blower load side horizontal vertical phase difference, tests motor load side level-blower load side
Horizontal, motor load side is vertical-and blower load side is vertical, motor load side axle is to the phase difference between-blower load side axial direction；
And it is recorded.
It tests blower, motor two sides vibration of bearings speed respectively using vibration probe, measures water respectively using dual probe
Flat-horizontal, vertical-vertical, axial-axial mutual phase difference, tests blower load side horizontal vertical phase difference, surveys
Try motor load side level-blower load side is horizontal, motor load side it is vertical-blower load side is vertical, motor load side axle to-
Phase difference between blower load side axial direction.
3) compare all directions four in bearing block, seat support, bracket bottom plate or the one of plane of concrete foundation
The size of the vibration speed value of the measurement point in direction, then compare the vibration speed value of the measurement point of Different Plane in same direction
Size；The vibration speed value of the vibration speed value of a measurement point and other coplanar three measurement points of the measurement point if it exists
The first difference be all larger than the first preset threshold, then further relatively with the measurement point in the same direction and not with the measurement point
Second difference of other three measurement points in the same plane, if second difference is all larger than the second preset value, the survey
Exist at amount point and loosens.
Compare bearing block, seat support, bracket bottom plate, concrete foundation all directions four direction vibration speed value it is big
It is small, four orientation vibration amplitude sizes in more each plane.As shown in Figure 3 (in figure numerical value unit be mm/s), on foundation drawing
It can be seen that blower load side bottom righthand side concrete pedestal, bottom plate, vibration values are far smaller than other 3 vibration values at bearing block, analyze
Think that a this point is tighter, it is not firm that excess-three point has basis in various degree.The vibration of blower free side upper right side concrete foundation
Be worth it is larger, and the point with there are phase differences 60 for bottom plate above0C illustrates that there may be base flexibles herein.
4) further compare blower, motor two sides phase difference, if the motor load side level-blower load side level
Phase difference is reversed, the motor load side it is vertical-the vertical phase difference of blower load side is reversed, the motor load side axle to-
Bearing block level-horizontal phase difference of reversed, the described shaft coupling two sides of blower load side axial direction phase difference is reversed, the shaft coupling
The bearing blocks of two sides is vertical-and vertical phase difference is reversed or axial-axial phase difference of bearing block of the shaft coupling two sides is reversed, then
It can determine whether that shaft coupling two sides exist reversed between motor, blower, shaft coupling two sides angle misaligns；It is same in phase difference ± 30 °
To 180 ° ± 30 ° of phase difference are reversed.
Comparing the adjacent two sides phase difference of blower, motor, motor load side is horizontal --- blower load side horizontal phase is poor
1450, motor load side is vertical --- blower load side vertical phase poor 1790, motor load side axle to --- blower load side is axial
Phase difference 1730.Blower, motor axial 1800It is axial reversed, horizontal, vertical phase difference about 1800, thus can determine that fan operation
There is biggish angle in the process to misalign.And base flexible will lead to the up and down motion of armature spindle in operation process, to make
At dynamically misaligning at a high speed, thinking to loosen there are gene basis causes dynamic centering during high-speed cruising poor.
5) it shuts down, after shutting down, restarts, and using the dynamic balancing function of vibration analyzer, according to dynamic balance method pair
Blower does dynamic balancing, if plus counterweight angle changing, illustrate that bearing block center of gravity is being drifted about.
It shuts down, is again started up, using the dynamic balancing function of vibration analyzer, blower is done according to dynamic balance method flat
Weighing apparatus.If calculating plus counterweight angle changing, the angle that discovery draught fan impeller increases counterweight is unstable, in 23 degree to 91 degree ranges
Interior variation, and need balance weight is larger to reach 3.52kg.Accordingly, think since base flexible causes impeller center of gravity to be floated
It moves.
If 6) tested bearing block exists simultaneously step 3) -5) in situation, can be determined that the concrete of bearing block
There is a problem of loosening in basis or place mat is not firm, needs to shut down, hang the machine rotor that blows in, shell and bearing block, blower foundation is done
Again processing is poured.
Comprehensive analysis, vibration-testing discovery, vibrating numerical is unstable, and there are have on bottom plate beyond vibration of foundation speed
Numerical value；Centering is good when shutdown, and there are 180 degree or so is reversed for shaft coupling two sides when running at high speed；Dynamic balance instrument tests counterweight angle
Unstable, phenomena such as eccentric mass is circumferentially not fixed is spent, can determine that basis exists and loosen.Then week age is shut down, hangs and blows in
Machine rotor, shell, bearing block find that there are three points not to pad completely between pedestal base and concrete pedestal after slinging bearing block
It is real, there is also bottom plates on bearing block when wedge is in fan operation fine motion polishing scratch.Secondary grout layer is destroyed, it is again levelling with wedge
Pad lower margin.
After blower is reinstalled, data after in-site measurement maintenance, each measuring point vibration speed value declines to a great extent.Phase
Potential difference disappears and synchronizes, and the frequency content energy turned other than frequency is all smaller, and exclusion axial vibration completely ensure that the main exhausting of sintering
Machine stable operation.
The present invention is not limited to the above embodiment.All technical solutions formed using equivalent replacement, are all fallen within the present invention and wanted
The protection scope asked.
Claims (3)
1. a kind of loosening method of discrimination applied to blower mixed mud basis, it is characterised in that execute following steps:
1) equipment is installed；
2) bearing block using the shaft coupling two sides between binary channels vibration measurement instrument measurement blower and motor is horizontal-horizontal, it is vertical-
Vertically, axial-axial mutual phase difference, tests blower load side horizontal vertical phase difference, tests motor load side water
Flat-blower load side is horizontal, motor load side is vertical-and blower load side is vertical, motor load side axle is axial to-blower load side
Between phase difference；And it is recorded；
3) compare all directions four direction in bearing block, seat support, bracket bottom plate or the one of plane of concrete foundation
Measurement point vibration speed value size, then compare the big of the vibration speed value of the measurement point of Different Plane in same direction
It is small；The vibration speed value of a measurement point and the vibration speed value of other coplanar three measurement points of the measurement point if it exists
First difference is all larger than the first preset threshold, then further relatively exists in the same direction and not with the measurement point with the measurement point
Second difference of other three measurement points on same plane, if second difference is all larger than the second preset value, the measurement
Exist at point and loosens；
4) further compare blower, motor two sides phase difference, if the motor load side level-blower load side level phase
Difference is reversed, the motor load side is vertical-and the vertical phase difference of blower load side is reversed, the motor load side axle is to-blower
Bearing block level-horizontal phase difference of reversed, the described shaft coupling two sides of load side axial direction phase difference is reversed, the shaft coupling two sides
Bearing block it is vertical-vertical phase difference is reversed or axial-axial phase difference of bearing block of the shaft coupling two sides is reversed, then can sentence
Shaft coupling two sides exist reversed between power machine, blower, and shaft coupling two sides angle misaligns；
It is in phase difference ± 30 ° in the same direction, 180 ° ± 30 ° of phase difference are reversed；5) it shuts down, after shutting down, restarts, and utilize
The dynamic balancing function of vibration analyzer does dynamic balancing to blower according to dynamic balance method, if plus counterweight angle changing, say
Bright bearing block center of gravity is being drifted about；
If 6) tested bearing block exists simultaneously step 3) -5) in situation, can be determined that the concrete foundation of bearing block
It is middle to there is a problem of that loosening or place mat are not firm, it needs to shut down, hangs the machine rotor that blows in, shell and bearing block, blower foundation is done again
Pour processing.
2. the loosening method of discrimination according to claim 1 applied to blower mixed mud basis, it is characterised in that: step 1)
In, it installs on vibration probe to bearing block, rotational speed probe is mounted on the rack, and the sensitive film in corresponding rotary shaft.
3. the loosening method of discrimination according to claim 1 applied to blower mixed mud basis, it is characterised in that: pass through tune
Whole vibration probe position is successively acquired from top to bottom in all directions of all directions under identical operating condition, bearing block, seat support,
Bracket bottom plate, the vibration speed value of concrete foundation position and record.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810270152.1A CN110319919B (en) | 2018-03-29 | 2018-03-29 | Looseness judging method applied to fan concrete foundation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810270152.1A CN110319919B (en) | 2018-03-29 | 2018-03-29 | Looseness judging method applied to fan concrete foundation |
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| CN110319919B CN110319919B (en) | 2021-05-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112539935A (en) * | 2020-11-25 | 2021-03-23 | 西安因联信息科技有限公司 | Method for identifying basic faults of rotating machinery |
| CN114088369A (en) * | 2021-11-08 | 2022-02-25 | 华能(福建)能源开发有限公司福州分公司 | Vibration analysis and repair method for bearing seat |
| CN114281013A (en) * | 2021-08-30 | 2022-04-05 | 武钢集团昆明钢铁股份有限公司 | High-precision fan shaft vibration protection control device and method thereof |
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| CN114281013A (en) * | 2021-08-30 | 2022-04-05 | 武钢集团昆明钢铁股份有限公司 | High-precision fan shaft vibration protection control device and method thereof |
| CN114088369A (en) * | 2021-11-08 | 2022-02-25 | 华能(福建)能源开发有限公司福州分公司 | Vibration analysis and repair method for bearing seat |
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