CN105928611A - Fault early-warning system and method of mechanical device - Google Patents
Fault early-warning system and method of mechanical device Download PDFInfo
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- CN105928611A CN105928611A CN201610230780.8A CN201610230780A CN105928611A CN 105928611 A CN105928611 A CN 105928611A CN 201610230780 A CN201610230780 A CN 201610230780A CN 105928611 A CN105928611 A CN 105928611A
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a fault early-warning system and method of a mechanical device, and relates to the field of fault early warning. The system comprises a detector and a controller; the detector detects values of a vibration measuring point of the mechanical device in different work conditions; and the controller is connected with the detector, compares the value of the detected vibration measuring point in the preset condition with a corresponding prediction value to obtain a residual value therebetween, determines that vibration abnormity occurs in the vibration measuring point when the absolute value of the residual value is greater than a preset residual early-warning value, and outputs an early warning signal for the vibration measuring point. According to the system and method, fault of the vibration measuring point can be discovered timely, and corresponding early warning signals are emitted timely, so that monitoring staff are prompted to take active measures to ensure normal operation of the device and further prolong the service life of the device.
Description
Technical field
The present invention relates to fault pre-alarming field, in particular it relates to a kind of mechanical equipment fault early warning system and
Method.
Background technology
Plant equipment in commercial production and daily life all in occupation of consequence, in many industries
In, the vibration problem of plant equipment generally ratio is more prominent.As a example by the Turbo-generator Set of power system,
Vibration fault in various degree is occurred in that after a lot of new unit operations.Typically need to carry out for vibration fault and shake
Dynamic data acquisition, vibration data process and analyze.The vibration letter that traditional vibrating failure diagnosis will collect
Number process, obtain amplitude, frequency, phase place etc., then according to characteristic quantity and the equipment of vibration equipment
Relation between fault, judges to cause the possible cause of device fails.But traditional vibration event
Barrier diagnostic system can not find the early-stage development of mechanical equipment fault (generally to the diagnosis of vibration fault often
Being just to carry out after fault occurs to a certain degree and vibration performance occurs, the measure taked the most also is
Passive).
Therefore, in order to realize that the early stage sign of vibration measuring point value is tracked, need to be at vibration fault
Bud carries out early warning work, judges contingent fault in advance.If can sprouting in equipment fault
The bud stage just monitors the exception that fault exists, then be conducive to carrying out overhaul plan work targetedly, adopt
Take active, positive counter-measure, passively maintenance is changed into actively maintenance.
Summary of the invention
It is an object of the invention to provide a kind of mechanical equipment fault early warning system and method, above-mentioned existing to solve
There is the problem in technology.
To achieve these goals, the present invention provides a kind of mechanical equipment fault early warning system, wherein, is somebody's turn to do
System includes: detection device, for detecting the value of the vibration measuring point of described plant equipment under different operating mode；
And control device, it is connected with described detection device, for the vibration measuring point that will be detected under current working
Value compare the residual values obtained therebetween with corresponding predictive value, and exhausted in described residual values
In the case of the value predetermined residual error early warning value more than correspondence, determine that described vibration measuring point exists abnormal vibration
And export the early warning signal for described vibration measuring point.
The present invention also provides for a kind of mechanical equipment fault method for early warning, and wherein, the method includes: utilize inspection
Survey the value of the vibration measuring point of described plant equipment under the different operating mode of device detection；And utilize control device to incite somebody to action
The value of the vibration measuring point detected under current working compares with corresponding predictive value and obtains therebetween
Residual values, and in the case of the absolute value of described residual values is more than corresponding predetermined residual error early warning value,
Determine that described vibration measuring point exists abnormal vibration and exports the early warning signal for described vibration measuring point.
By technique scheme, the value that described plant equipment under different operating modes can be vibrated measuring point is entered
Row detection, then can be carried out the value of the vibration measuring point detected under current working with corresponding predictive value
Relatively obtain residual values therebetween, and at the absolute value of described residual values more than predetermined residual error early warning value
In the case of, determine that described vibration measuring point exists abnormal vibration and exports the early warning for described vibration measuring point
Signal.Thereby, it is possible to find the fault of the vibration measuring point existence of plant equipment in time and send corresponding pre-
Alert signal, thus remind monitoring personnel actively to take corresponding measure to guarantee the properly functioning of equipment and to prolong
The service life of long equipment, (that is, can eliminate fault in bud through predictive maintenance, prevention set
Standby runs down, it is ensured that equipment properly functioning, or the service life of extension device, improves economy
Benefit).
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, with
Detailed description below is used for explaining the present invention together, but is not intended that limitation of the present invention.?
In accompanying drawing:
Fig. 1 is the block diagram of the mechanical equipment fault early warning system according to one embodiment of the present invention；
Fig. 2 is the flow chart of the mechanical equipment fault method for early warning according to one embodiment of the present invention；
Fig. 3 shows the Measurement of Vibration value curve according to one embodiment of the present invention and vibration prediction value
The figure of curve；
Fig. 4 shows between the Measurement of Vibration value according to one embodiment of the present invention and vibration prediction value
The curve chart of Similarity value；
Fig. 5 shows between the Measurement of Vibration value according to one embodiment of the present invention and vibration prediction value
The curve chart of residual values；And
Fig. 6 shows the relevant measuring point causing vibrating measuring point exception according to one embodiment of the present invention
The schematic diagram of value.
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of the present invention is described in detail.It should be appreciated that
Detailed description of the invention described herein is merely to illustrate and explains the present invention, is not limited to this
Bright.
Mechanical equipment fault early warning system to the present invention as a example by plant equipment is as Turbo-generator Set below
System and method are described, it is to be understood by those skilled in the art that above-mentioned Turbo-generator Set is only
It is exemplary, is not intended to limit the present invention.
Fig. 1 is the block diagram of the mechanical equipment fault early warning system according to one embodiment of the present invention.
As it is shown in figure 1, the mechanical equipment fault early warning system that one embodiment of the present invention provides includes:
Detection device 10, for detecting the value of the vibration measuring point of described plant equipment under different operating mode；And control
Device 20, be connected with described detection device 10, for the vibration measuring point that will be detected under current working
Value (Measurement of Vibration value) compares with corresponding predictive value (vibration prediction value) and obtains therebetween
Residual values, and in the case of the absolute value of described residual values is more than corresponding predetermined residual error early warning value, really
There is abnormal vibration and export the early warning signal for described vibration measuring point in fixed described vibration measuring point.
Wherein, in plant equipment, may be generally present multiple different vibration measuring point.Such as, at vapour
In turbine generator group, (respectively detection turns to install 3 detection devices 10 near general each axle journal
The axle in x, y direction of son vibration itself shakes and detects device and the detection device of measurement axis bearing absolute vibration),
Those skilled in the art can according to practical situation carry out vibrate measuring point choose and detect device 10
Installation, this is not defined by the present invention.
By technique scheme, the value that described plant equipment under different operating modes can be vibrated measuring point is entered
Row detection, then can be carried out the value of the vibration measuring point detected under current working with corresponding predictive value
Relatively obtain residual values therebetween, and at the absolute value of described residual values more than predetermined residual error early warning value
In the case of, determine that described vibration measuring point exists abnormal vibration and exports the early warning for described vibration measuring point
Signal.Thereby, it is possible to find the fault of the vibration measuring point existence of plant equipment in time and send corresponding pre-
Alert signal, thus remind monitoring personnel actively to take corresponding measure to guarantee the properly functioning of equipment and to prolong
The service life of long equipment, (that is, can eliminate fault in bud through predictive maintenance, prevention set
Standby runs down, it is ensured that equipment properly functioning, or the service life of extension device, improves economy
Benefit).
According to one embodiment of the present invention, while exporting described early warning signal, described control device
20 are additionally operable to:
Obtain the value of the multiple relevant measuring point associated to described vibration measuring point；
The value of acquired multiple relevant measuring point is compared with each self-corresponding preset range, and will be super
Go out the relevant measuring point (that is, cause vibrating measuring point and the relevant measuring point of abnormal vibration occurs) of the preset range of correspondence
Value output.
Wherein, relevant measuring point refers to those and may cause vibrating measuring point and the measuring point of abnormal vibration occur.This
Skilled person can preset vibration measuring point according to practical situation and which is associated be correlated with measuring point, and
Can obtain, by such as lookup table mode, the relevant measuring point being associated to vibration measuring point, but the invention is not restricted to
This.
Thus, it is possible to using the important evidence overhauled as plant equipment and cause vibrate measuring point occur vibration
The value of abnormal relevant measuring point is supplied to monitoring personnel one by one, reminds testing staff to pay close attention to the correlative measurement of correspondence
Point, such that it is able to reduce the workload of testing staff, and is converted into actively maintenance by existing passive maintenance,
Non-programmed halt is converted into planned shut-down, increases economic efficiency further.
According to one embodiment of the present invention, described detection device 10 can be vibrating sensor.
According to one embodiment of the present invention, wherein, this system can also include display device 30, with institute
State control device 20 to connect, exceed value and the root of the relevant measuring point of corresponding preset range for display
Early warning information is shown according to described early warning signal.
Wherein, described early warning information can be that vibration measuring point exists abnormal vibration.
By the display device display to early warning information, can more intuitively remind monitoring personnel actively
Take corresponding maintenance measure.
According to one embodiment of the present invention, described vibration measuring point can include that axle shakes measuring point and survey of watt shaking
Point.
According to one embodiment of the present invention, described relevant measuring point include following at least one: meritorious
Power measuring point, reactive power measuring point, Stream temperature degree measuring point, main vapour pressure measuring point, pad bearing temperature point
With lubricating oil temperature measuring point.
Table 1 lists the parameter needed for mechanical equipment fault early warning of the present invention.
Table 1
It will be appreciated by those skilled in the art that what table was merely exemplary, be not intended to limit the present invention.
Understanding in conjunction with table 1, the above-mentioned axle of the present invention measuring point that shakes can include that the X in table 1, Y-direction axle shake
Measuring point, and the above-mentioned measuring point that watt shakes of the present invention can include that the measuring point that watt shakes in table 1 is (it is, to set
Standby for high pressure cylinder as a example by, axle shake the value of measuring point can be peak-to-peak value, 1X amplitude and phase place, 2X amplitude,
Any one in 0.5X amplitude and gap voltage；The value of measuring point of watt shaking can be peak-to-peak value, 1X amplitude
With any one in phase place, 2X amplitude and 0.5X amplitude.Intermediate pressure cylinder, low pressure (LP) cylinder and electromotor are with high
The situation of cylinder pressure is similar to, and does not repeats them here)；The above-mentioned relevant measuring point of the present invention can include in table 1
Relevant parameter measuring point and state control parameter measuring point (it is, the value of relevant measuring point can be to associate ginseng
The value of any one in number or state control the value of any one in parameter).
According to one embodiment of the present invention, the value of the vibration measuring point that detection device 10 detects can be deposited
Storage, in PI data base, is similar to, and the value of relevant measuring point can also be stored in PI data base, in control
When device 20 processed needs to use these data, directly call from PI data base.Wherein, PI is
A set of based on B/S (B/S represents browser/server), C/S (C/S representative client/server)
The real-time data base software system of structure, can preserve METHOD FOR TURBOGENERATOR SET and transport for a long time in PI data base
The mass data (including current data and historical data) of row, these mass datas comprise very abundant
The various service datas of information, i.e. Turbo-generator Set, such as axle shakes, watt shake, active power, idle
Power, Stream temperature degree, main vapour pressure, lubricating oil temperature, rotating speed etc..
Wherein, it was predicted that value can calculate, owing to gray theory is in mathematical operation based on gray theory
Existing ripe theoretical, in order to not obscure the present invention, the present invention does not repeats them here.
And it is possible to choose the residual values of maximum from the residual values of each vibration measuring point as predetermined residual error
Early warning value.Further, it is also possible to predetermined residual error early warning value is finely adjusted according to practical situation.
Fig. 2 is the flow chart of the mechanical equipment fault method for early warning according to one embodiment of the present invention.
As in figure 2 it is shown, the mechanical equipment fault method for early warning of one embodiment of the present invention includes:
S200, utilizes the value of the vibration measuring point of described plant equipment under the detection different operating mode of device detection；
S202, utilizes and controls device by the value vibrating measuring point detected under current working and corresponding prediction
Value compares the residual values obtained therebetween；
S204, whether the absolute value of described residual values is more than corresponding predetermined residual error to utilize control device to judge
Early warning value, if it is goes to step S206, otherwise goes to step S200；And
S206, determines that described vibration measuring point exists abnormal vibration and exports the early warning for described vibration measuring point
Signal.
By technique scheme, the value that described plant equipment under different operating modes can be vibrated measuring point is entered
Row detection, then can be carried out the value of the vibration measuring point detected under current working with corresponding predictive value
Relatively obtain residual values therebetween, and at the absolute value of described residual values more than predetermined residual error early warning value
In the case of, determine that described vibration measuring point exists abnormal vibration and exports the early warning for described vibration measuring point
Signal.Thereby, it is possible to find the fault of the vibration measuring point existence of plant equipment in time and send corresponding pre-
Alert signal, thus remind monitoring personnel actively to take corresponding measure to guarantee the properly functioning of equipment and to prolong
The service life of long equipment, (that is, can eliminate fault in bud through predictive maintenance, prevention set
Standby runs down, it is ensured that equipment properly functioning, or the service life of extension device, improves economy
Benefit).
According to one embodiment of the present invention, while exporting described early warning signal, the method also includes
Utilize described control device:
Obtain the value of the multiple relevant measuring point associated to described vibration measuring point；
The value of acquired multiple relevant measuring point is compared with each self-corresponding preset range, and will be super
Go out the value output of the relevant measuring point of the preset range of correspondence.
Thus, it is possible to be supplied to the relevant measuring point of the important evidence overhauled as plant equipment monitor people
Member, reminds testing staff to pay close attention to the relevant measuring point of correspondence, such that it is able to reduce the workload of testing staff,
And existing passive maintenance is converted into actively maintenance, non-programmed halt is converted into planned shut-down, enters one
Step is increased economic efficiency.
According to one embodiment of the present invention, the method also includes utilizing display device to show beyond correspondence
The value of the relevant measuring point of preset range and show early warning information according to described early warning signal.
Wherein, described early warning information can be that vibration measuring point exists abnormal vibration.
By the display device display to early warning information, can more intuitively remind monitoring personnel actively
Take corresponding maintenance measure.
According to one embodiment of the present invention, described vibration measuring point includes that axle shakes measuring point and the measuring point that watt shakes.
According to one embodiment of the present invention, described relevant measuring point include following at least one: meritorious
Power measuring point, reactive power measuring point, Stream temperature degree measuring point, main vapour pressure measuring point, pad bearing temperature point
With lubricating oil temperature measuring point.
Below in conjunction with example (as a example by certain axle of certain Turbo-generator Set of certain power plant shakes) to the present invention
Mechanical equipment fault prealarming process be described.
Fig. 3 shows the Measurement of Vibration value curve according to one embodiment of the present invention and vibration prediction value
The figure of curve.
In figure 3, vertical coordinate is the amplitude of vibration measuring point, and unit is μm；Abscissa is the time.As
Fig. 3 understands, between 14 days 17 May in 2012 is up to 22 time, vibration prediction value and measured value it
Between difference bigger.The size of difference can represent with Similarity value, as shown in Figure 4.
Fig. 4 shows between the Measurement of Vibration value according to one embodiment of the present invention and vibration prediction value
The curve chart of Similarity value.
Fig. 4 showed in the corresponding time, Similarity value curve between vibration prediction value and measured value (
Similarity value less than in the case of 1, Similarity value closer to 1 show the state vibrating measuring point closer to
Historical state), between 14 days 17 May in 2012 is up to 22 time, vibration prediction value and reality
Similarity value between measured value is relatively low, and about 0.69, reflect that vibration prediction value is bigger with measured value difference.
Correspondingly, the residual values between vibration prediction value and measured value can be as shown in Figure 5.
Fig. 5 shows between the Measurement of Vibration value according to one embodiment of the present invention and vibration prediction value
The curve chart of residual values.
As shown in Figure 5, the set point of residual values can be (-6,6) (although in above-mentioned embodiment
The predetermined residual error early warning value described is a point value but it also may replace with predetermined by predetermined residual error early warning value
Residual error early warning range), between 14 days 17 May in 2012 is up to 22 time, vibration prediction value and reality
Residual values between measured value reaches 11.3, beyond preset range (-6,6).When residual values more than 6 it
After, early warning system will produce early warning information, which reflects this vibration measuring point in this period and occurs in that and shake
Dynamic abnormal.
Additionally, after sending early warning signal, can will lead in the multiple relevant measuring point of vibration measuring point association
Cause vibration measuring point occurs that the value of the relevant measuring point of abnormal vibration is supplied to monitoring personnel one by one, reminds detection people
Member pays close attention to corresponding relevant measuring point, carries out service work targetedly.
Fig. 6 shows the relevant measuring point causing vibrating measuring point exception according to one embodiment of the present invention
The schematic diagram of the value of (association measuring point).
As shown in Figure 6, there is early warning information in the axle of No. 1 bearing X-direction of the such as No. 4 units peak-to-peak value that shakes
After, can calculate and cause the axle of No. 1 bearing X-direction of No. 4 units peak-to-peak value that shakes that abnormal pass translocation occurs
Point, and list one by one.Specifically, list 3 association measuring points in figure 6, be No. 4 machines respectively
Organize 1, No. 4 No. 2 pad bearing temperature of unit (adjusting valve end) 2,4 of No. 2 pad bearing temperature (adjusting valve end)
Number No. 2 pad bearing temperature of unit (adjusting valve end) 3.According to the prompting of association measuring point, maintainer is in inspection
Corresponding association measuring point will be checked by emphasis during repairing, carry out service work targetedly, will be passive
Maintenance changes into actively overhauling.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention does not limit
Detail in above-mentioned embodiment, in the technology concept of the present invention, can be to the present invention
Technical scheme carry out multiple simple variant, these simple variant belong to protection scope of the present invention.
It is further to note that each the concrete technology described in above-mentioned detailed description of the invention is special
Levy, in the case of reconcilable, can be combined by any suitable means.In order to avoid need not
The repetition wanted, various possible compound modes are illustrated by the present invention the most separately.
Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as its
Without prejudice to the thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (11)
1. a mechanical equipment fault early warning system, wherein, this system includes:
Detection device, for detecting the value of the vibration measuring point of described plant equipment under different operating mode；And
Control device, be connected with described detection device, for the vibration measuring point that will be detected under current working
Value compare the residual values obtained therebetween with corresponding predictive value, and exhausted in described residual values
In the case of the value predetermined residual error early warning value more than correspondence, determine that described vibration measuring point exists abnormal vibration
And export the early warning signal for described vibration measuring point.
System the most according to claim 1, wherein, while exporting described early warning signal,
Described control device is additionally operable to:
Obtain the value of the multiple relevant measuring point associated to described vibration measuring point；
The value of acquired multiple relevant measuring point is compared with each self-corresponding preset range, and will be super
Go out the value output of the relevant measuring point of the preset range of correspondence.
System the most according to claim 1, wherein, described detection device is vibrating sensor.
System the most according to claim 2, wherein, this system also includes display device, with institute
State control device to connect, for display beyond the value of the relevant measuring point of corresponding preset range and according to institute
State early warning signal display early warning information.
System the most according to claim 4, wherein, described vibration measuring point include axle shake measuring point and
Watt shake measuring point.
System the most according to claim 5, wherein, described relevant measuring point include following in extremely
Few one: active power measuring point, reactive power measuring point, Stream temperature degree measuring point, main vapour pressure measuring point, watt
Bearing temperature measuring point and lubricating oil temperature measuring point.
7. a mechanical equipment fault method for early warning, wherein, the method includes:
Utilize the value of the vibration measuring point of described plant equipment under the detection different operating mode of device detection；And
Control device is utilized the value of the vibration measuring point detected under current working to be entered with corresponding predictive value
Row compares the residual values obtained therebetween, and predetermined residual more than corresponding at the absolute value of described residual values
In the case of difference early warning value, determine that described vibration measuring point exists abnormal vibration and exports for described vibration survey
The early warning signal of point.
Method the most according to claim 7, wherein, while exporting described early warning signal,
The method also includes utilizing described control device:
Obtain the value of the multiple relevant measuring point associated to described vibration measuring point；
The value of acquired multiple relevant measuring point is compared with each self-corresponding preset range, and will be super
Go out the value output of the relevant measuring point of the preset range of correspondence.
Method the most according to claim 8, wherein, the method also includes utilizing display device to show
Show the value of the relevant measuring point beyond corresponding preset range and carry according to the display early warning of described early warning signal
Show information.
Method the most according to claim 9, wherein, described vibration measuring point include axle shake measuring point and
Watt shake measuring point.
11. methods according to claim 10, wherein, described relevant measuring point include following in
At least one: active power measuring point, reactive power measuring point, Stream temperature degree measuring point, main vapour pressure measuring point,
Pad bearing temperature point and lubricating oil temperature measuring point.
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| CN201610230780.8A CN105928611A (en) | 2016-04-14 | 2016-04-14 | Fault early-warning system and method of mechanical device |
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| CN201610230780.8A CN105928611A (en) | 2016-04-14 | 2016-04-14 | Fault early-warning system and method of mechanical device |
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| CN106995077A (en) * | 2017-02-08 | 2017-08-01 | 河南中烟工业有限责任公司 | A kind of packaging facilities mechanical breakdown self-diagnosing method and device |
| CN107036819A (en) * | 2017-05-02 | 2017-08-11 | 大唐东北电力试验研究所有限公司 | The Turbo-generator Set remote oscillation fault diagnosis method and system of multi-parameter amendment |
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| CN109186748A (en) * | 2018-07-25 | 2019-01-11 | 大唐东北电力试验研究院有限公司 | A kind of subsidiary engine vibration method for early warning and system based on big data digging technology |
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