CN108663616A - Large-size machine shaft axial displacement state analysis method - Google Patents
Large-size machine shaft axial displacement state analysis method Download PDFInfo
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- CN108663616A CN108663616A CN201810195427.XA CN201810195427A CN108663616A CN 108663616 A CN108663616 A CN 108663616A CN 201810195427 A CN201810195427 A CN 201810195427A CN 108663616 A CN108663616 A CN 108663616A
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 35
- 238000004458 analytical method Methods 0.000 title claims abstract description 17
- 238000012544 monitoring process Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000003068 static effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000010223 real-time analysis Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a kind of large-size machine shaft axial displacement state analysis method, machine shaft forms rotational supporting structure with bush seat in this method, sets two side clearance of bush seat as d1 and d2；Measuring plate is set in shaft one end, the displacement variable for measuring side surface is detected using shaft position sensor；Monitoring system man-machine interface setting abscissa be time t, the coordinate system that ordinate is distance D, abscissa upper and lower is respectively the operating status area of bush seat both sides；Early warning line, alarming line and limit line and operating status line are set separately in operating status area, after motor operation, axial displacement occurs for machine shaft, and when operating status line falls into early warning line with alarming line section and alarming line and limit line section, monitoring system issues warning signal and alarm signal.This method compares the combinatory analysis of preset data by the setting to on-line real-time measuremen, acquisition information, monitoring system, intuitively obtains motor real-time running state.
Description
Technical field
The present invention relates to a kind of large-size machine shaft axial displacement state analysis methods.
Background technology
Axial displacement on-line monitoring is in the prior art to one of the important means of large rotating machinery body condition monitoring, master
To be used for monitoring the relative position in rotating machinery body between thrust ring flange and thrust bearing, pass through various types of monitors
Record delta data, setting alarm critical value, to play the role of protecting equipment.But large rotating machinery, such as large-size machine,
Axial displacement is made of a lot of reasons, such as external impacts, electromagnetic field are asymmetric, bearing shell oil film is unstable, die misalignment, there is no
Method carries out fining analysis using the prior art.
Invention content
Technical problem to be solved by the invention is to provide a kind of large-size machine shaft axial displacement state analysis methods, originally
Method compares the combinatory analysis of preset data by the setting to on-line real-time measuremen, acquisition information, monitoring system, intuitively
Motor real-time running state is obtained, to be conducive to failure anticipation, the real-time analysis of non-faulting operating status.
In order to solve the above technical problems, large-size machine shaft axial displacement state analysis method of the present invention includes following step
Suddenly：
Step 1: machine shaft forms rotational supporting structure with bush seat, setting bush seat both sides are respectively the sides A and the sides B, the sides A
Gap between shaft thrust surface and bearing shell thrust surface is d1, and the gap between the sides B shaft thrust surface and bearing shell thrust surface is d2；
In the Measuring plate of shaft one end setting and shaft synchronous rotary, measures side surface and shaft position sensor is set, axial displacement passes
Sensor detection measures the displacement variable of side surface；
Step 2: monitoring system man-machine interface setting abscissa be time t, the coordinate system that ordinate is distance D, on abscissa
Side and lower section are respectively first quartile and the second quadrant, and first quartile and the second quadrant are respectively the sides A operating status area and the sides B fortune
Row state area；
Step 3: setting the sides A operating status area and the sides B operation shape successively in the first quartile of coordinate system and the second quadrant respectively
Early warning line, alarming line and the limit line and operating status line in state area, under the static original state of machine shaft, operating status
Line and time t overlapping of axles, and the limit line spacing in operating status line and the sides A operating status area is d1, operating status line and the sides B
The limit line spacing in operating status area is d2；After machine shaft rotation, the distance between operating status line and time t axis are d3；
Step 3: after motor operation, axial displacement occurs for machine shaft, is detected by shaft position sensor and measures side surface
Displacement variable to obtain the variable quantity of d1 and d2, and by variable quantity data transmission to the system that monitors, monitors the man-machine boundary of system
Face shows the change location of operating status line, and when operating status line falls into early warning line with alarming line section, monitoring system is sent out
Pre-warning signal, when operating status line falls into alarming line with limit line section, monitoring system sends out alarm signal.
Further, in motor operation course, monitoring system records operating status line and falls into early warning line and alarming line respectively
The number of section and alarming line and limit line section.
Further, it is sound and light signal that monitoring system, which is issued warning signal with alarm signal,.
It is since large-size machine shaft axial displacement state analysis method of the present invention uses above-mentioned technical proposal, i.e., electric in this method
Machine shaft forms rotational supporting structure with bush seat, sets two side clearance of bush seat as d1 and d2；It is arranged in shaft one end and measures
Disk detects the displacement variable for measuring side surface using shaft position sensor；In monitoring system man-machine interface, abscissa is set
For the coordinate system that time t, ordinate are distance D, abscissa upper and lower is respectively the operating status area of bush seat both sides；Run shape
Early warning line, alarming line are set separately in state area and limits line and operating status line, after motor operation, machine shaft occurs axial
Displacement, when operating status line falls into early warning line with alarming line section, monitoring system issues warning signal, when operating status line is fallen
When entering alarming line with limit line section, monitoring system sends out alarm signal.This method passes through to on-line real-time measuremen, acquisition information
Setting, monitoring system compares the combinatory analysis of preset data, motor real-time running state is intuitively obtained, to be conducive to
Failure prejudges, the real-time analysis of non-faulting operating status.
Description of the drawings
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
Fig. 1 is machine shaft and bush seat rotational supporting structure schematic diagram in this method；
Fig. 2 is coordinate system schematic diagram in this method；
Fig. 3 is motor operation course operating status line position change schematic diagram in this method.
Specific implementation mode
Embodiment is as depicted in figs. 1 and 2, and large-size machine shaft axial displacement state analysis method of the present invention includes following step
Suddenly：
Step 1: machine shaft 1 forms rotational supporting structure with bush seat 2,2 both sides of setting bush seat are respectively the sides A and the sides B, A
Gap between side shaft thrust surface 11 and bearing shell thrust surface 21 is d1, between the sides B shaft thrust surface 12 and bearing shell thrust surface 22
Gap be d2；In the Measuring plate 3 of 1 one end of shaft setting and 1 synchronous rotary of shaft, 3 end face of Measuring plate is arranged axial displacement and passes
Sensor 4, shaft position sensor 4 detect the displacement variable of 3 end face of Measuring plate；
Step 2: monitoring system man-machine interface setting abscissa be time t, the coordinate system that ordinate is distance D, on abscissa
Side and lower section are respectively first quartile and the second quadrant, and first quartile and the second quadrant are respectively the sides A operating status area and the sides B fortune
Row state area；
Step 3: setting the sides A operating status area and the sides B operation shape successively in the first quartile of coordinate system and the second quadrant respectively
The early warning line 7 in state area, 8, alarming line 6,9 and limit line 5,10 and operating status line d, in the initial shape that machine shaft 1 is static
Under state, operating status line d and time t overlapping of axles, and 5 spacing of limit line in the sides operating status line d and A operating status area is
10 spacing of limit line in d1, operating status line d and the sides B operating status area is d2；Machine shaft 1 rotate after, operating status line d with
The distance between time t axis is d3；
Step 3: after motor operation, axial displacement occurs for machine shaft 1, and 3 end of Measuring plate is detected by shaft position sensor 4
The displacement variable in face to obtain the variable quantity of d1 and d2, and by variable quantity data transmission to the system that monitors, monitors system people
The change location of machine interface display operating status line d, when operating status line d falls into early warning line 7,8 with alarming line 6,9 section,
Monitoring system issues warning signal, when operating status line d falls into alarming line 6,9 with limit line 5,10 section, monitoring system hair
Go out alarm signal.
Preferably, in motor operation course, monitoring system records operating status line d and falls into early warning line 7,8 and report respectively
Alert line 6,9 sections and alarming line 6,9 and limit line 5, the number in 10 sections.
Preferably, it is sound and light signal that monitoring system, which is issued warning signal with alarm signal,.
The axial displacement of shaft when this method detects motor operation by Measuring plate and shaft position sensor, and monitoring
The coordinate system of the corresponding shaft axial displacement of system man-machine interface setting, in coordinate system setting early warning line, alarming line and limit line with
And operating status line, corresponding judgement is made according to the change in displacement of operating status line.
This method in practical application, under big machine shaft stationary state, initially join by the gap for measuring the sides A and the sides B
Number d1, d2 e.g. measure d1=5mm, d2=4mm, which are set as to operate preceding initial parameter, which immobilizes, and is monitoring
D3 is adjusted to 0 by system man-machine interface, makes operating status line and time t overlapping of axles；In the coordinate of monitoring system man-machine interface
The width of precautionary areas and zone of alarm is set in system, i.e. the sides A early warning line to alarming line is precautionary areas, and alarming line to limit line is alarm
Area, the sides B early warning line to alarming line are precautionary areas, and alarming line to limit line is zone of alarm, it is assumed that is all 1mm.
After electric motor starting, machine shaft rotation, the axial position of shaft can change at this time, and shift value is by measuring
The shaft position sensor of side surface setting obtains, and gap total d1+d2 is constant at this time, but the gaps d1 and d2 can change,
If operating status line is second as offseting downward 0.5mm in limiting, operating status line is 0.5mm, explanation with t axis distances d3
Machine shaft from initial rest state start rotation after to the displacement of the sides B 0.5mm, corresponding d1=5.5mm, d2=3.5mm, and
The real-time dynamic value of d1, d2, d3 are shown in man-machine interface.It, can be intuitive relative to existing axial displacement monitoring technology
Ground reflects change in location, direction change and the numerical value change of shaft before and after electric motor starting, can be analyzed for professional technician
The reason of changing and influence to motor itself；In addition, between the early warning line of the first picture limit and the early warning line of the second picture limit
It is safe operating area, the fluctuation that condition line is run when motor is run in this safety zone can also be used as technical staff to electricity
The analysis and research of machine operating status.
As shown in figure 3, when machine shaft is abnormal, moved to the sides B such as after by external impacts, operating status line d's
The peak value d5 of prewarning area or operating status line d that peak value d4 enters between early warning line 8 and alarming line 9 enters alarming line 9 and limit
Alarm region between bit line 10 is then made record and is shown in man-machine interface, due in motor operation course, operating personnel
Can not possibly whole process be monitored in man-machine interface, when unusual condition is happened at it is unattended when, operating personnel can be by man-machine
Interface checks time and peak valley numerical value when being abnormal, and can with other monitoring objectives, such as voltage, electric current, rotating speed, temperature
The reason of etc. combining, analyzing abnormal generation, when the peak value d5 of operating status line d enters between alarming line 9 and limit line 10
Alarm region when, monitoring system sends out the alarms such as acousto-optic, prompts operating personnel that emergency occurs.
This method not only remains the effect to the early warning or the alarm that prevent axial impact in the prior art, while passing through electricity
Machine is static and the comparison that starts, by the variation of direction of displacement, obtain more refine to the analysis of motor operating state and examine
It is disconnected.
Claims (3)
1. a kind of large-size machine shaft axial displacement state analysis method, it is characterised in that this method includes the following steps：
Step 1: machine shaft forms rotational supporting structure with bush seat, setting bush seat both sides are respectively the sides A and the sides B, the sides A
Gap between shaft thrust surface and bearing shell thrust surface is d1, and the gap between the sides B shaft thrust surface and bearing shell thrust surface is d2；
In the Measuring plate of shaft one end setting and shaft synchronous rotary, measures side surface and shaft position sensor is set, axial displacement passes
Sensor detection measures the displacement variable of side surface；
Step 2: monitoring system man-machine interface setting abscissa be time t, the coordinate system that ordinate is distance D, on abscissa
Side and lower section are respectively first quartile and the second quadrant, and first quartile and the second quadrant are respectively the sides A operating status area and the sides B fortune
Row state area；
Step 3: setting the sides A operating status area and the sides B operation shape successively in the first quartile of coordinate system and the second quadrant respectively
Early warning line, alarming line and the limit line and operating status line in state area, under the static original state of machine shaft, operating status
Line and time t overlapping of axles, and the limit line spacing in operating status line and the sides A operating status area is d1, operating status line and the sides B
The limit line spacing in operating status area is d2；After machine shaft rotation, the distance between operating status line and time t axis are d3；
Step 3: after motor operation, axial displacement occurs for machine shaft, is detected by shaft position sensor and measures side surface
Displacement variable to obtain the variable quantity of d1 and d2, and by variable quantity data transmission to the system that monitors, monitors the man-machine boundary of system
Face shows the change location of operating status line, and when operating status line falls into early warning line with alarming line section, monitoring system is sent out
Pre-warning signal, when operating status line falls into alarming line with limit line section, monitoring system sends out alarm signal.
2. large-size machine shaft axial displacement state analysis method according to claim 1, it is characterised in that：It is transported in motor
During row, monitoring system records operating status line and falls into early warning line and alarming line section and alarming line and limit bitline regions respectively
Between number.
3. large-size machine shaft axial displacement state analysis method according to claim 1 or 2, it is characterised in that：Monitoring
It is sound and light signal that system, which is issued warning signal with alarm signal,.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810195427.XA CN108663616A (en) | 2018-03-09 | 2018-03-09 | Large-size machine shaft axial displacement state analysis method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810195427.XA CN108663616A (en) | 2018-03-09 | 2018-03-09 | Large-size machine shaft axial displacement state analysis method |
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| Publication Number | Publication Date |
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| CN108663616A true CN108663616A (en) | 2018-10-16 |
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ID=63783841
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810195427.XA Pending CN108663616A (en) | 2018-03-09 | 2018-03-09 | Large-size machine shaft axial displacement state analysis method |
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| CN101008674A (en) * | 2006-01-24 | 2007-08-01 | 河海大学常州校区 | Device for testing axial displacement of hydroelectric generating set and working method therefor |
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Application publication date: 20181016 |
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