CN109709888B - Automatic damping method for spraying system - Google Patents
Automatic damping method for spraying system Download PDFInfo
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- CN109709888B CN109709888B CN201811630800.6A CN201811630800A CN109709888B CN 109709888 B CN109709888 B CN 109709888B CN 201811630800 A CN201811630800 A CN 201811630800A CN 109709888 B CN109709888 B CN 109709888B
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- 238000005507 spraying Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000013016 damping Methods 0.000 title abstract description 8
- 238000001228 spectrum Methods 0.000 claims abstract description 72
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 238000010521 absorption reaction Methods 0.000 claims abstract description 4
- 230000035939 shock Effects 0.000 claims abstract description 4
- 230000002159 abnormal effect Effects 0.000 claims description 14
- 230000000875 corresponding effect Effects 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000001133 acceleration Effects 0.000 abstract description 4
- 230000005856 abnormality Effects 0.000 description 6
- 238000010422 painting Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000013332 literature search Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The invention discloses an automatic damping method for a spraying system, which comprises the following steps: 1) installing a plurality of vibration sensors on all vibration sources in the spraying system; 2) connecting the data output ends of all the vibration sensors with a filter and a spectrum analyzer, connecting the output ends of the filter and the spectrum analyzer with a PLC, and connecting the output end of the PLC with a PC; 3) the method comprises the steps that a spectrum analyzer obtains original spectrum data, and stores the original spectrum data in a PLC and a PC; 4) when the spraying system works, the vibration sensor can detect a vibration source in real time and send data to the spectrum analyzer, the spectrum analyzer converts the received data into real-time spectrum data and then transmits the real-time spectrum data to the PLC and the PC, and the PC can compare the real-time spectrum data with the original spectrum data; 5) the PLC is connected with all the motors and the control valves, controls the motors and the control valves according to the comparison result, balances the flow in a liquid discharge or air exhaust mode in a motor acceleration or deceleration mode, and achieves the aim of shock absorption.
Description
Technical Field
The invention relates to the field of fault diagnosis of a spraying system, in particular to an automatic damping method for the spraying system.
Background
In the spraying system, due to the fact that the number of vibration sources is large, vibration is abnormal. The existing scheme is that a vibration sensor is used for detecting vibration quantity, and the vibration quantity is used for directly judging the abnormal vibration nearby a vibration source; after the vibration abnormality is found, the vibration source, such as a fan, a water pump, etc., is usually disassembled for maintenance.
However, for the vibration abnormality of natural frequency and frequency multiplication thereof and resonance of the vibration source in the spraying system, the maintenance of disassembling the vibration source cannot be solved.
Disclosure of Invention
The invention aims to provide an automatic damping method for a spraying system, aiming at overcoming the defects in the prior art and solving the problems in the prior art.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
an automatic shock absorption method for a spray coating system, comprising the steps of:
1) installing a plurality of vibration sensors on all vibration sources in the spraying system;
2) the data output ends of all the vibration sensors are connected with the filter and the spectrum analyzer, the output ends of the filter and the spectrum analyzer are connected with the PLC, and the input end of the PLC is connected with the PC and used for receiving a control signal fed back by the PC; the output end of the PLC is respectively connected with a vibration source and a liquid valve or an exhaust valve thereof and is used for controlling the vibration source and a flow control assembly thereof to execute corresponding actions according to the feedback control signal;
3) the method comprises the steps that a spectrum analyzer obtains original spectrum data, and stores the original spectrum data in a PLC and a PC;
4) when the spraying system works, the vibration sensor can detect a vibration source in real time and send data to the spectrum analyzer, the spectrum analyzer converts the received data into real-time spectrum data and then transmits the real-time spectrum data to the PLC and the PC, and the PC can compare the received real-time spectrum data with the original spectrum data;
if the comparison shows that the vibration quantity of the real-time frequency spectrum data at a certain position is larger than the vibration quantity of the original frequency spectrum data at the position, judging that the vibration abnormality exists at the position, wherein the frequency corresponding to the abnormal vibration quantity is the natural frequency and the frequency multiplication of the natural frequency of the part with the vibration fault;
5) the control signal output end of the PC feeds back a control signal to the PLC, the PLC sends the fed-back control signal to the motor of the vibration source with abnormal vibration, and the motor skips over the resonance frequency in an acceleration or deceleration mode to achieve the purpose of vibration reduction; for the problem of flow balance caused by the change of the rotating speed of the motor, the PC can control the flow control assembly corresponding to the vibration source to realize the flow balance.
Further, the process of acquiring the original spectrum data is as follows:
a) setting the number of the vibration sources as R, and the number of the vibration sensors arranged on the vibration sources as N, wherein the spectrum analyzer can acquire N × R original spectrum data when each vibration source is independently started;
b) additionally, all vibration sources are started simultaneously, and N x (R +1) original frequency spectrum data are obtained in total;
the real-time spectrum data and the original spectrum data both comprise vibration quantity and frequency corresponding to the vibration quantity.
Further, the flow control assembly comprises a liquid flow control assembly and a gas flow control assembly;
the flow control assembly comprises a water pump, a liquid discharge pipeline communicated with the water pump and a liquid valve arranged on the liquid discharge pipeline; the gas flow control assembly comprises a fan, an exhaust pipeline communicated with the fan and an exhaust valve arranged on the exhaust pipeline;
the liquid valve and the exhaust valve are connected with the output end of the PLC and are used for realizing flow balance in a liquid discharge or exhaust mode under the control of the PLC.
Compared with the prior art, the invention has the beneficial effects that:
for the vibration abnormality of natural frequency, frequency multiplication and vibration source in the spraying system, the PC controls the motor to skip the resonance frequency in an acceleration or deceleration way, thus achieving the purpose of vibration reduction; for the problem of flow balance caused by the change of the rotating speed of the motor, the PC can control the corresponding liquid valve or exhaust valve to realize the flow balance in a liquid discharging or air exhausting mode.
Drawings
Fig. 1 is a schematic connection structure diagram of an automatic damping method for a painting system according to the present invention.
Fig. 2 is a schematic view of the installation of the liquid valve or the exhaust valve according to the present invention.
FIG. 3 is a schematic flow chart illustrating an automatic damping method for a painting system according to the present invention.
Fig. 4 is a schematic diagram of real-time spectrum data and original spectrum data according to the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Referring to fig. 1, 2, 3 and 4, the automatic damping method for a painting system according to the present invention includes the steps of:
1) installing a plurality of vibration sensors on all vibration sources in the spraying system;
2) the data output ends of all the vibration sensors are connected with the filter and the spectrum analyzer, the output ends of the filter and the spectrum analyzer are connected with the PLC, and the input end of the PLC is connected with the PC and used for receiving a control signal fed back by the PC; the output end of the PLC is respectively connected with a vibration source and a liquid valve or an exhaust valve thereof and is used for controlling the vibration source and a flow control assembly thereof to execute corresponding actions according to the feedback control signal;
3) the method comprises the steps that a spectrum analyzer obtains original spectrum data, and stores the original spectrum data in a PLC and a PC;
4) when the spraying system works, the vibration sensor can detect a vibration source in real time and send data to the spectrum analyzer, the spectrum analyzer converts the received data into real-time spectrum data and then transmits the real-time spectrum data to the PLC and the PC, and the PC can compare the received real-time spectrum data with the original spectrum data;
if the comparison shows that the vibration quantity of the real-time frequency spectrum data at a certain position is larger than the vibration quantity of the original frequency spectrum data at the position, judging that the vibration abnormality exists at the position, wherein the frequency corresponding to the abnormal vibration quantity is the natural frequency and the frequency multiplication of the natural frequency of the part with the vibration fault;
5) the control signal output end of the PC feeds back a control signal to the PLC, the PLC sends the fed-back control signal to the motor of the vibration source with abnormal vibration, and the motor skips over the resonance frequency in an acceleration or deceleration mode to achieve the purpose of vibration reduction; for the problem of flow balance caused by the change of the rotating speed of the motor, the PC can control the flow control assembly corresponding to the vibration source to realize the flow balance.
The acquisition process of the original spectrum data is as follows:
a) setting the number of the vibration sources as R, and the number of the vibration sensors arranged on the vibration sources as N, wherein the spectrum analyzer can acquire N × R original spectrum data when each vibration source is independently started;
b) additionally, all vibration sources are started simultaneously, and N x (R +1) original frequency spectrum data are obtained in total;
the real-time spectrum data and the original spectrum data both comprise vibration quantity and frequency corresponding to the vibration quantity.
The flow control assembly comprises a liquid flow control assembly and a gas flow control assembly;
the flow control assembly comprises a water pump, a liquid discharge pipeline communicated with the water pump and a liquid valve arranged on the liquid discharge pipeline; the gas flow control assembly comprises a fan, an exhaust pipeline communicated with the fan and an exhaust valve arranged on the exhaust pipeline;
the liquid valve and the exhaust valve are connected with the output end of the PLC and are used for realizing flow balance in a liquid discharge or exhaust mode under the control of the PLC.
Referring to fig. 4, the real-time spectrum data and the raw spectrum data contain contents that can be divided into a vibration amount on the vertical axis and a frequency on the horizontal axis. The lower waveform is the vibration quantity of each vibration source independently started at each time, and the upper waveform is the vibration quantity of the vibration sources when vibration fault hidden danger occurs. As shown in fig. 4, when the vibration source works normally, the vibration source will vibrate at the natural frequency and its multiple frequency, i.e. its vibration amount is the vibration amount of the original system; when a vibration source at a certain position has abnormal vibration, the vibration quantity of the vibration source is obviously higher than that of the vibration source in normal work. At this time, the frequency of the horizontal axis corresponding to the abnormal vibration amount is the natural frequency and the frequency multiplication of the abnormal vibration component.
Those skilled in the art can then determine the abnormal component of the vibration according to the frequency value of the horizontal axis, for example:
1) when the range of the horizontal axis frequency is lower than 10HZ, the vibration belongs to low-frequency vibration, and is usually abnormal due to the low natural frequency and frequency multiplication of structures such as structures or supports; the invention is a method for automatically reducing the low-frequency vibration;
2) when the frequency of the horizontal axis ranges from 10HZ to 1000HZ, the vibration belongs to medium-frequency vibration, and usually motor rotating equipment such as a fan, a water pump and the like generates abnormal vibration; if the four-stage motor 1450RPM is 24.17HZ, and drives the 4-blade fan, there is a 24.17 × 4-96.67 HZ and its stress of frequency doubling, and the vibration occurs at these frequencies;
3) when the frequency range of the horizontal axis is higher than 1000HZ, the vibration belongs to high-frequency vibration, and the vibration abnormality of a bearing or multi-blade rotating equipment usually occurs; if the four-stage motor 1450RPM is 24.17HZ, drives the 4-blade fan, drives the 15 ball bearings, there are 1 force bearing 24.17HZ, 4 HZ, 96.67HZ, and 1 force bearing 24.17HZ, 15 HZ, 362.55HZ, i.e. 24.17HZ, 4 HZ, 1450HZ, and its multiple frequency force, and the vibration occurs at these frequencies.
The correspondence between the above frequencies and the components is the prior art, and those skilled in the art can find out through literature search or experiments.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. An automatic shock absorption method for a spray coating system, comprising the steps of:
1) installing a plurality of vibration sensors on all vibration sources in the spraying system;
2) the data output ends of all the vibration sensors are connected with the filter and the spectrum analyzer, the output ends of the filter and the spectrum analyzer are connected with the PLC, and the input end of the PLC is connected with the PC and used for receiving a control signal fed back by the PC; the output end of the PLC is respectively connected with a vibration source and a liquid valve or an exhaust valve thereof and is used for controlling the vibration source and a flow control assembly thereof to execute corresponding actions according to the feedback control signal;
3) the method comprises the steps that a spectrum analyzer obtains original spectrum data, and stores the original spectrum data in a PLC and a PC;
4) when the spraying system works, the vibration sensor can detect a vibration source in real time and send data to the spectrum analyzer, the spectrum analyzer converts the received data into real-time spectrum data and then transmits the real-time spectrum data to the PLC and the PC, and the PC can compare the received real-time spectrum data with the original spectrum data;
5) if the comparison shows that the vibration quantity of the real-time frequency spectrum data at a certain position is larger than the vibration quantity of the original frequency spectrum data at the position, judging that the position has abnormal vibration, wherein the frequency corresponding to the abnormal vibration quantity is the control signal output end of the zero PC with the vibration fault and feeds back a control signal to the PLC; for the problem of flow balance caused by the change of the rotating speed of the motor, the PC can control a flow control assembly corresponding to the vibration source to realize flow balance;
the natural frequency of the part and its multiple frequency;
6) the flow control assembly comprises a liquid flow control assembly and a gas flow control assembly;
the flow control assembly comprises a water pump, a liquid discharge pipeline communicated with the water pump and a liquid valve arranged on the liquid discharge pipeline; the gas flow control assembly comprises a fan, an exhaust pipeline communicated with the fan and an exhaust valve arranged on the exhaust pipeline;
the liquid valve and the exhaust valve are connected with the output end of the PLC and are used for realizing flow balance in a liquid discharge or exhaust mode under the control of the PLC.
2. The automatic shock absorption method for a spray coating system according to claim 1,
the acquisition process of the original spectrum data is as follows:
a) setting the number of the vibration sources as R, and the number of the vibration sensors arranged on the vibration sources as N, wherein the spectrum analyzer can acquire N × R original spectrum data when each vibration source is independently started;
b) additionally, all vibration sources are started simultaneously, and N x (R +1) original frequency spectrum data are obtained in total;
the real-time spectrum data and the original spectrum data both comprise vibration quantity and frequency corresponding to the vibration quantity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811630800.6A CN109709888B (en) | 2018-12-29 | 2018-12-29 | Automatic damping method for spraying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811630800.6A CN109709888B (en) | 2018-12-29 | 2018-12-29 | Automatic damping method for spraying system |
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| Publication Number | Publication Date |
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| CN109709888A CN109709888A (en) | 2019-05-03 |
| CN109709888B true CN109709888B (en) | 2021-08-17 |
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| CN201811630800.6A Active CN109709888B (en) | 2018-12-29 | 2018-12-29 | Automatic damping method for spraying system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008131381A1 (en) * | 2007-04-23 | 2008-10-30 | Nordson Corporation | Configuration of a can coating system using one button |
| CN103148162A (en) * | 2013-03-12 | 2013-06-12 | 三一汽车起重机械有限公司 | Crane, and vibration self-stabilizing control method, device and system |
| CN103671060A (en) * | 2013-12-06 | 2014-03-26 | 杭州哲达节能科技有限公司 | Sensor-free constant current pump valve integrated device |
| CN105910785A (en) * | 2016-06-14 | 2016-08-31 | 武汉理工大学 | Pipeline vibration test platform based on fault diagnosis and automatic processing, and control method thereof |
| CN108507670A (en) * | 2018-05-14 | 2018-09-07 | 浙江日鼎涂装科技有限公司 | A kind of vibrations method for diagnosing faults for paint finishing |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7311004B2 (en) * | 2003-03-10 | 2007-12-25 | Capstan Ag Systems, Inc. | Flow control and operation monitoring system for individual spray nozzles |
| US9204812B2 (en) * | 2007-10-31 | 2015-12-08 | DePuy Synthes Products, LLC | Wireless pressure sensing shunts |
| CN207487097U (en) * | 2017-10-27 | 2018-06-12 | 郑州日产汽车有限公司 | For the vibration absorber of Painting Shop exhaust system |
| CN108718495A (en) * | 2018-07-03 | 2018-10-30 | 郑州立佳热喷涂机械有限公司 | The thermal spraying fuel spraying control system and control method of closed-loop automation control |
-
2018
- 2018-12-29 CN CN201811630800.6A patent/CN109709888B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008131381A1 (en) * | 2007-04-23 | 2008-10-30 | Nordson Corporation | Configuration of a can coating system using one button |
| CN103148162A (en) * | 2013-03-12 | 2013-06-12 | 三一汽车起重机械有限公司 | Crane, and vibration self-stabilizing control method, device and system |
| CN103671060A (en) * | 2013-12-06 | 2014-03-26 | 杭州哲达节能科技有限公司 | Sensor-free constant current pump valve integrated device |
| CN105910785A (en) * | 2016-06-14 | 2016-08-31 | 武汉理工大学 | Pipeline vibration test platform based on fault diagnosis and automatic processing, and control method thereof |
| CN108507670A (en) * | 2018-05-14 | 2018-09-07 | 浙江日鼎涂装科技有限公司 | A kind of vibrations method for diagnosing faults for paint finishing |
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| CN109709888A (en) | 2019-05-03 |
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