CN109969370A - The control method and system of oil cooler cooling water excitation heat exchange tube vibration - Google Patents
The control method and system of oil cooler cooling water excitation heat exchange tube vibration Download PDFInfo
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- CN109969370A CN109969370A CN201910266402.9A CN201910266402A CN109969370A CN 109969370 A CN109969370 A CN 109969370A CN 201910266402 A CN201910266402 A CN 201910266402A CN 109969370 A CN109969370 A CN 109969370A
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- cooling water
- frequency
- oil cooler
- fluctuation pressure
- heat exchanger
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
- B63H21/383—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like for handling cooling-water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The embodiment of the present invention provides the control method and system of a kind of oil cooler cooling water excitation heat exchange tube vibration, comprising: obtains the fluctuation pressure crest frequency of cooling water in the pipeline of oil cooler cooling water inlet；If the difference between the fluctuation pressure crest frequency of cooling water and the intrinsic frequency of oil cooler heat exchanger tube is within the first preset range, or, the long-chain polymer of preset concentration is then added within the second preset range in difference in the fluctuation pressure crest frequency and oil cooler heat exchanger tube of cooling water between the excitation peak frequency of lubricating oil into oil cooler cooling water inlet pipeline.The embodiment of the present invention is by being added long-chain polymer into oil cooler cooling water inlet pipeline, so that the intrinsic frequency of the fluctuation pressure crest frequency of cooling water and heat exchanger tube, the excitation peak frequency of lubricating oil are all different in the pipeline of oil cooler cooling water inlet, heat exchanger tube is namely made not resonate when being cooled water excitation, to improve the security reliability and service life of oil cooler.
Description
Technical field
The present embodiments relate to automatic control technology field more particularly to a kind of excitation heat exchanger tube vibrations of oil cooler cooling water
Dynamic control method and system.
Background technique
In integral central cooling water system for marine diesel engine, it is pooled to oil cooler after lubricating oil experience all parts, passes through heat exchange with cooling water
Heat exchange occurs for pipe.
When the cooling water inlet fluid pulsation pressure peak frequency of oil cooler and intrinsic frequency, the heat exchanger tube of heat exchange tube structure
When outer lubricating oil fluid fluctuation pressure major peaks frequency is close or consistent, it will oil cooler and heat exchanger tube is caused to occur altogether
Vibration, the security reliability and service life for reducing oil cooler.
The vibration control that oil cooler heat exchanger tube is currently generally carried out by the structure design of cooler, still, in cold oil
It cannot be adjusted after the completion of the structure design of device, the vibration control requirement being unable to satisfy under the conditions of variable working condition.
Summary of the invention
In view of the above-mentioned problems, the embodiment of the present invention provides a kind of control method of oil cooler cooling water excitation heat exchange tube vibration
And system.
In a first aspect, the embodiment of the present invention provides a kind of control method of oil cooler cooling water excitation heat exchange tube vibration, packet
It includes:
Obtain the fluctuation pressure crest frequency of cooling water in the pipeline of oil cooler cooling water inlet；
If the difference between the fluctuation pressure crest frequency of the cooling water and the intrinsic frequency of oil cooler heat exchanger tube is
Within one preset range, or, lubricating oil swashs in the fluctuation pressure crest frequency of the cooling water and the oil cooler heat exchanger tube
The difference between crest frequency is encouraged within the second preset range, then is added into oil cooler cooling water inlet pipeline default
The long-chain polymer of concentration, so that the fluctuation pressure crest frequency that cooling water after long-chain polymer is added is changed with the steam turbine
Difference between the intrinsic frequency of heat pipe to be added cooling water after long-chain polymer except first preset range
Difference in fluctuation pressure crest frequency and the oil cooler heat exchanger tube between the excitation peak frequency of lubricating oil is described second
Except preset range.
Second aspect, the embodiment of the present invention provide a kind of control system of oil cooler cooling water excitation heat exchange tube vibration, packet
It includes:
Module is obtained, for obtaining the fluctuation pressure crest frequency of cooling water in the pipeline of oil cooler cooling water inlet；
Adjustment module, if for the cooling water fluctuation pressure crest frequency and oil cooler heat exchanger tube intrinsic frequency it
Between difference within the first preset range, or, the fluctuation pressure crest frequency of the cooling water and the oil cooler heat exchanger tube
Difference between the excitation peak frequency of middle lubricating oil is then managed to the oil cooler cooling water inlet within the second preset range
In road be added preset concentration long-chain polymer so that be added long-chain polymer after cooling water fluctuation pressure crest frequency with
Difference between the intrinsic frequency of the steam turbine heat exchanger tube except first preset range that long chain polymeric is added
Difference after object in the fluctuation pressure crest frequency of cooling water and the oil cooler heat exchanger tube between the excitation peak frequency of lubricating oil
Value is except second preset range.
The control method and system of a kind of oil cooler cooling water excitation heat exchange tube vibration provided in an embodiment of the present invention, pass through
The long-chain polymer of certain volume is added into oil cooler cooling water inlet pipeline, so that cold in the pipeline of oil cooler cooling water inlet
But the intrinsic frequency of the fluctuation pressure crest frequency of water and heat exchanger tube, in heat exchanger tube lubricating oil excitation peak frequency not phase
Together, that is, heat exchanger tube will not be resonated when being cooled water excitation, to improve the security reliability of oil cooler
And service life, also, the structure of oil cooler is had no need to change, the amount of long-chain polymer is added, by changing to adapt to exchange work
Requirement under the conditions of condition.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of process of the control method of oil cooler cooling water excitation heat exchange tube vibration provided in an embodiment of the present invention
Figure；
Fig. 2 is a kind of control device of Oil Cooler of Steam Turbine cooling water excitation heat exchange tube vibration provided in an embodiment of the present invention
Structural schematic diagram；
Fig. 3 is the fluctuation pressure time domain data schematic diagram of cooling water in the embodiment of the present invention；
Fig. 4 is the schematic diagram of the fluctuation pressure frequency spectrum of cooling water in the embodiment of the present invention；
Fig. 5 is the fluctuation pressure peak of long-chain polymer concentration and cooling water after addition long-chain polymer in the embodiment of the present invention
The preset relation schematic diagram being worth between frequency；
Fig. 6 is a kind of structure of the control system of oil cooler cooling water excitation heat exchange tube vibration provided in an embodiment of the present invention
Schematic diagram.
Appended drawing reference:
1, cooling water；2, cooling water inlet pipeline；
3, oil cooler；4, cooling water outlet pipeline；
5, lubricating oil；6, lubricating oil inlet pipeline；
7, heat exchanger tube；8, lubricating oil outlet pipeline；
9, oscillatory pressure pick-up；10, conducting wire；
11, control unit；12, long-chain polymer inlet.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Fig. 1 is a kind of process of the control method of oil cooler cooling water excitation heat exchange tube vibration provided in an embodiment of the present invention
Figure, as shown in Figure 1, this method comprises:
S1 obtains the fluctuation pressure crest frequency of cooling water in the pipeline of oil cooler cooling water inlet；
S2, if the difference between the fluctuation pressure crest frequency of the cooling water and the intrinsic frequency of oil cooler heat exchanger tube exists
Within first preset range, or, lubricating oil in the fluctuation pressure crest frequency of the cooling water and the oil cooler heat exchanger tube
Difference between excitation peak frequency is added within the second preset range, then into oil cooler cooling water inlet pipeline pre-
If the long-chain polymer of concentration, so that the fluctuation pressure crest frequency and the steam turbine of cooling water after long-chain polymer is added
Difference between the intrinsic frequency of heat exchanger tube makes cooling water after addition long-chain polymer except first preset range
Fluctuation pressure crest frequency and the oil cooler heat exchanger tube in lubricating oil excitation peak frequency between difference described
Except two preset ranges.
The fluctuation pressure crest frequency for obtaining cooling water in the pipeline of oil cooler cooling water inlet first, then by cooling water
Fluctuation pressure crest frequency is compared with the intrinsic frequency of heat-exchange tube of cooler, if the fluctuation pressure crest frequency of cooling water
Intrinsic frequency with heat exchanger tube illustrates the fluctuation pressure crest frequency of cooling water and consolidating for heat exchanger tube within the first preset range
It is very close there is frequency, in this way, heat exchanger tube is easy to happen resonance under the excitation of cooling water, lead to oil cooler uses the longevity
Life shortens.
Similarly, it will be lubricated in the fluctuation pressure crest frequency and heat exchanger tube of cooling water in the pipeline of oil cooler cooling water inlet
The excitation peak frequency of oil is compared, if the excitation peak of the fluctuation pressure crest frequency of cooling water and lubricating oil in heat exchanger tube
It is worth the difference between frequency within the second preset range, illustrates to lubricate in the fluctuation pressure crest frequency and heat exchanger tube of cooling water
The excitation peak frequency of oil is very close, in this way, heat exchanger tube is easy to happen resonance, under the excitation of cooling water so as to cause cold
The service life of oily device shortens.
Difference between the fluctuation pressure crest frequency of cooling water and the intrinsic frequency of oil cooler heat exchanger tube is default first
In range, alternatively, in the fluctuation pressure crest frequency and oil cooler heat exchanger tube of cooling water between the excitation peak frequency of lubricating oil
Difference within the second preset range, as long as meeting one of conditions above, illustrate that heat exchanger tube is easy to happen resonance, because
This, needs to be added the long-chain polymer of certain volume, the long-chain polymer meeting after addition into oil cooler cooling water inlet pipeline
It is dissolved in cooling water, thus changes the fluctuation pressure crest frequency of cooling water in the pipeline of oil cooler cooling water inlet.
Also, the fluctuation pressure crest frequency of cooling water and the intrinsic frequency of oil cooler heat exchanger tube after long-chain polymer is added
Between difference outside the first preset range, the fluctuation pressure crest frequency and lubricating oil of cooling water after long-chain polymer is added
Excitation peak frequency is outside the second preset range, in this way, heat exchanger tube would not resonate.
It should be noted that in the present embodiment, the long-chain polymer is soluble long-chain polymer, including polypropylene
Soluble high molecular polymers also can be selected in amide and acrylamide etc..
The control method of a kind of oil cooler cooling water excitation heat exchange tube vibration provided in an embodiment of the present invention, by cold oil
The long-chain polymer of certain volume is added in the pipeline of device cooling water inlet, so that cooling water in the pipeline of oil cooler cooling water inlet
The excitation peak frequency of lubricating oil is all different in the intrinsic frequency of fluctuation pressure crest frequency and heat exchanger tube, heat exchanger tube, also
It is so that heat exchanger tube will not resonate when being cooled water excitation, to improve the security reliability of oil cooler and use the longevity
Life, also, haves no need to change the structure of oil cooler, and the amount of long-chain polymer is added by changing, under the conditions of adapting to variable working condition
Requirement.
On the basis of the above embodiments, it is preferable that further include:
If the difference between the fluctuation pressure crest frequency of the cooling water and the intrinsic frequency of the steam turbine heat exchanger tube
It is lubricated except first preset range, and in the fluctuation pressure crest frequency of the cooling water and the oil cooler heat exchanger tube
Difference between the excitation peak frequency of oil is except second preset range, then the value of the preset concentration is 0.
Specifically, if difference between the fluctuation pressure crest frequency of cooling water and the intrinsic frequency of oil cooler heat exchanger tube
Except the first preset range, also, between the fluctuation pressure crest frequency of cooling water and the excitation peak frequency of lubricating oil
Difference except the second preset range, illustrate the fluctuation pressure crest frequency of cooling water and the intrinsic frequency of oil cooler heat exchanger tube,
The excitation peak frequency of lubricating oil is not close, so, heat exchanger tube will not resonate, then without carrying out any operation.
The embodiment of the present invention by by the excitation peak frequency of the fluctuation pressure crest frequency of cooling water and lubricating oil, heat exchange
The structural natural frequencies of pipe are compared, it is ensured that in the case that the fluctuation pressure crest frequency and the two of cooling water are all kept off,
Then without carrying out any operation, heat exchanger tube will not resonate.
On the basis of the above embodiments, it is preferable that the preset concentration obtains in the following way:
The fluctuation pressure crest frequency of cooling water after long-chain polymer is added is obtained, cooling water after addition long-chain polymer
The difference of the intrinsic frequency of fluctuation pressure crest frequency and the oil cooler heat exchanger tube is added except first preset range
The excitation peak frequency of the fluctuation pressure crest frequency of cooling water and lubricating oil in the oil cooler heat exchanger tube after long-chain polymer
Difference except second preset range；
According to the fluctuation pressure crest frequency and default corresponding relationship of cooling water after addition long-chain polymer, obtain described pre-
If the value of concentration, the default corresponding relationship is long-chain polymer concentration and the fluctuation pressure that cooling water after long-chain polymer is added
Corresponding relationship between crest frequency.
The concentration that long-chain polymer is added can determine by the following method:
Firstly, determining the excitation peak frequency of lubricating oil in the intrinsic frequency and oil cooler heat exchanger tube of oil cooler heat exchanger tube
Afterwards, fluctuation pressure crest frequency of the frequency as cooling water after addition long-chain polymer, the rule of selecting frequency can be chosen
Then are as follows: the difference between the fluctuation pressure crest frequency selected and the intrinsic frequency of oil cooler heat exchanger tube is in the first preset range
Except, and the difference between the excitation peak frequency of lubricating oil in oil cooler heat exchanger tube is except the second preset range.
Preferably, from the point of view of save the cost, the fluctuation pressure crest frequency of selection can make the long-chain being added poly- again
It is less to close object.
The fluctuation pressure crest frequency of cooling water determines it after addition long-chain polymer in the pipeline of oil cooler cooling water inlet
Afterwards, according to the default corresponding relationship between the fluctuation pressure crest frequency and long-chain polymer, long-chain polymer concentration is determined, and
And the default corresponding relationship is known in advance.
The embodiment of the present invention gives the circular of long-chain polymer volume, can be determined and be added according to real-time working condition
Enter the amount of long-chain polymer, so that the excitation peak frequency of the cooling water in the pipeline of cooling water inlet avoids the intrinsic frequency of heat-transfer pipe
The fluctuation pressure crest frequency of lubricating oil in rate, heat-transfer pipe, heat exchanger tube will not occur heat supply under extraneous excitation, adapt to exchange work
The requirement of condition.
On the basis of the above embodiments, it is preferable that before the fluctuation pressure crest frequency for obtaining cooling water, also wrap
It includes:
Obtain the fluctuation pressure time domain data of the cooling water；
Spectrum Conversion is carried out to the fluctuation pressure time domain data of the cooling water, obtains the fluctuation pressure frequency of the cooling water
Spectrum；
According to the fluctuation pressure frequency spectrum of the cooling water, the fluctuation pressure crest frequency of the cooling water is obtained.
Specifically, the fluctuation pressure crest frequency of the cooling water is obtained by following two step:
The fluctuation pressure time domain data for obtaining cooling water first, carries out Spectrum Conversion to it, obtains the pulsating pressure of cooling water
Power frequency spectrum, using the spectrum peak of the fluctuation pressure frequency spectrum as the fluctuation pressure peaks spectrum of cooling water.
On the basis of the above embodiments, it is preferable that the fluctuation pressure time domain data for obtaining the cooling water is specific
It obtains in the following way:
The fluctuation pressure time domain data of the cooling water is obtained by oscillatory pressure pick-up.
Specifically, the fluctuation pressure time domain data of cooling water is acquired by oscillatory pressure pick-up.
On the basis of the above embodiments, it is preferable that the intrinsic frequency of the oil cooler heat exchanger tube includes that several ranks are intrinsic
Frequency.
Generally, the intrinsic frequency of oil cooler heat exchanger tube has multistage intrinsic frequency, and its dominant frequency that resonates typically occurs in
First three rank, so generally choose first three rank intrinsic frequency, by first three rank intrinsic frequency all with the fluctuation pressure frequency of lubricating oil into
Row compares.
On the basis of the above embodiments, it is preferable that the fluctuation pressure crest frequency of cooling water after long-chain polymer is added
For 60HZ.
It is experimentally confirmed, the arteries and veins of cooling water after long-chain polymer is added in the Oil Cooler of Steam Turbine cooling water inlet pipeline
Dynamic pressure crest frequency is preferably 60HZ.
On the basis of the above embodiments, it is preferable that the preset concentration of the long-chain polymer is 0.05%.
It is experimentally confirmed, long-chain polymer concentration is preferably 0.05% in the Oil Cooler of Steam Turbine.Work as long-chain polymer
When concentration is 0.05%, the fluctuation pressure crest frequency of cooling water is 60HZ after addition long-chain polymer, both can guarantee addition length
The intrinsic frequency of the fluctuation pressure crest frequency of cooling water and heat exchanger tube after chain polymerization object, in heat exchanger tube lubricating oil excitation peak
Frequency is kept off, and can guarantee that the long-chain polymer of addition is less, saves implementation cost.
In conclusion a kind of control method of oil cooler cooling water excitation heat exchange tube vibration provided in an embodiment of the present invention,
By the way that the long-chain polymer of certain volume is added into oil cooler cooling water inlet pipeline, so that cooling after long-chain polymer is added
The excitation peak frequency of lubricating oil is all different in the intrinsic frequency of the fluctuation pressure crest frequency of water and heat exchanger tube, heat exchanger tube,
Namely heat exchanger tube will not resonate under dynamic excitation, to improve the security reliability and service life of oil cooler.
Also, the circular of long-chain polymer volume is given, can be determined according to real-time working condition and long-chain is added
The amount of polymer adapts to the requirement of variable working condition to ensure that heat supply will not occur for heat exchanger tube.
Fig. 2 is a kind of control device of Oil Cooler of Steam Turbine cooling water excitation heat exchange tube vibration provided in an embodiment of the present invention
Structural schematic diagram, as shown in Fig. 2, the device is improved by the oil cooler relevant portion to steam turbine, so that the device
It can be realized the above method.In use, cooling water 1 enters oil cooler 3 by cooling water inlet pipeline 2, lubricating oil 5 passes through lubrication
Oil-in pipeline 6 enters heat exchanger tube 7, the cooling water 1 in oil cooler 3 with after the generation heat exchange of lubricating oil 5 in heat exchanger tube 7 from cold
But water outlet line 4 flows out oil cooler, from cooling water outlet pipe after the progress heat exchange of cooling water 1 in lubricating oil 5 and oil cooler 3
Flow out oil cooler in road 8.
Arrange that oscillatory pressure pick-up 9, Fig. 3 are cooling in the embodiment of the present invention on the cooling water inlet pipeline 2 of oil cooler
The fluctuation pressure time domain data schematic diagram of water, as shown in figure 3, abscissa indicates the time in figure, unit is the second, and ordinate indicates arteries and veins
Dynamic pressure, unit Pa, the collected fluctuation pressure time domain data of oscillatory pressure pick-up 9 are transmitted to control list by conducting wire 10
Member 11, received fluctuation pressure time domain data is transformed to fluctuation pressure frequency spectrum by control unit 11.
In the embodiment of the present invention, the first natural frequency of heat exchanger tube 7 is 33HZ, and second-order intrinsic frequency is 45HZ, the
Three rank intrinsic frequencies are 70HZ, and Fig. 4 is the schematic diagram of the fluctuation pressure frequency spectrum of cooling water in the embodiment of the present invention, as shown in Figure 4,
Abscissa in figure indicates frequency, unit HZ, and ordinate indicates fluctuation pressure amplitude, unit Pa, the pulsating pressure of cooling water
Power crest frequency 45Hz, it is almost the same with the second-order intrinsic frequency of heat exchanger tube 7, need to adjust oil cooler cooling water inlet pipeline
The fluctuation pressure frequency spectrum of middle cooling water makes its crest frequency avoid first three rank intrinsic frequency of heat exchanger tube 7.
Fig. 5 is the fluctuation pressure peak of long-chain polymer concentration and cooling water after addition long-chain polymer in the embodiment of the present invention
The preset relation schematic diagram being worth between frequency, as shown in figure 5, abscissa indicates long-chain polymer concentration in figure, ordinate is indicated
When long-chain polymer concentration 0.05%, cooling water pulsating pressure after long-chain polymer is added in fluctuation pressure crest frequency, unit Pa
Power crest frequency is about 60Hz.60HZ not only can guarantee that oil cooler was not vibrated with heat exchanger tube, but also can guarantee that the long-chain of addition is poly-
It is less to close object, save the cost.
Cooling water flow is accounted for by the injection of long-chain polymer inlet 12 being arranged on oil cooler cooling water inlet pipeline 2
0.05% long-chain polymer can then make the fluctuation pressure crest frequency of cooling water after long-chain polymer is added avoid heat exchanger tube
7 preceding 3 rank intrinsic frequency reaches the peace for weakening heat exchanger tube vibratory response caused by oil cooler cooling water motivates, improving oil cooler
The beneficial effect of full reliability and service life.
On the basis of the above embodiments, the major peaks frequency that lubricating oil motivates in heat exchanger tube 7 is 45.2Hz, according to figure
4 are calculated the fluctuation pressure crest frequency 45Hz of cooling water, and the major peaks frequency motivated with lubricating oil in heat exchanger tube 7 connects
Closely, needing to adjust cooling water fluctuation pressure frequency spectrum after long-chain polymer is added in stream oil cooler cooling water inlet pipeline 2 makes its peak value
Frequency avoids the major peaks frequency of the outer lubricating oil of heat exchanger tube 7 excitation.
The fluctuation pressure peak value frequency of cooling water after long-chain polymer is added it is found that when long-chain polymer concentration 0.05% in Fig. 5
Rate is about 60Hz.
Cooling water flow is accounted for by the injection of long-chain polymer inlet 12 being arranged on oil cooler cooling water inlet pipeline 2
0.05% long-chain polymer can then make cooling water fluctuation pressure crest frequency after long-chain polymer is added avoid heat exchanger tube 7
The major peaks frequency of middle lubricating oil excitation reaches and weakens heat exchanger tube vibratory response caused by oil cooler cooling water motivates, improves
The security reliability of oil cooler and the beneficial effect of service life.
Fig. 6 is a kind of structure of the control system of oil cooler cooling water excitation heat exchange tube vibration provided in an embodiment of the present invention
Schematic diagram, as shown in fig. 6, the system includes: to obtain module 601, adjustment module 602, in which:
Obtain the fluctuation pressure crest frequency that module 601 is used to obtain cooling water in the pipeline of oil cooler cooling water inlet；
If adjustment module 602 is for the fluctuation pressure crest frequency of the cooling water and the intrinsic frequency of oil cooler heat exchanger tube
Between difference within the first preset range, or, the fluctuation pressure crest frequency of the cooling water and the oil cooler exchange heat
Difference in pipe between the excitation peak frequency of lubricating oil is within the second preset range, then to the oil cooler cooling water inlet
The long-chain polymer of preset concentration is added in pipeline, so that the fluctuation pressure crest frequency of cooling water after long-chain polymer is added
Difference between the intrinsic frequency of the steam turbine heat exchanger tube makes addition long-chain poly- except first preset range
After conjunction object in the fluctuation pressure crest frequency and the oil cooler heat exchanger tube of cooling water between the excitation peak frequency of lubricating oil
Difference is except second preset range.
The specific implementation procedure of this system embodiment and the specific implementation procedure of above method embodiment are identical, and details please join
Above method embodiment is examined, details are not described herein for this system embodiment.
The control system of a kind of oil cooler cooling water excitation heat exchange tube vibration provided in an embodiment of the present invention, by cold oil
The long-chain polymer of certain volume is added in the pipeline of device cooling water inlet, so that cooling water in the pipeline of oil cooler cooling water inlet
The excitation peak frequency of lubricating oil is all different in the intrinsic frequency of fluctuation pressure crest frequency and heat exchanger tube, heat exchanger tube, also
It is so that heat exchanger tube will not resonate when being cooled water excitation, to improve the security reliability of oil cooler and use the longevity
Life, also, haves no need to change the structure of oil cooler, and the amount of long-chain polymer is added by changing, under the conditions of adapting to variable working condition
Requirement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (9)
1. a kind of control method of oil cooler cooling water excitation heat exchange tube vibration characterized by comprising
Obtain the fluctuation pressure crest frequency of cooling water in the pipeline of oil cooler cooling water inlet；
If the difference between the fluctuation pressure crest frequency of the cooling water and the intrinsic frequency of oil cooler heat exchanger tube is pre- first
Within the scope of if, or, the excitation peak of the fluctuation pressure crest frequency of the cooling water and lubricating oil in the oil cooler heat exchanger tube
It is worth the difference between frequency within the second preset range, then preset concentration is added into oil cooler cooling water inlet pipeline
Long-chain polymer so that be added long-chain polymer after cooling water fluctuation pressure crest frequency and the steam turbine heat exchanger tube
Intrinsic frequency between difference except first preset range, and make be added long-chain polymer after cooling water pulsation
Difference in pressure peak frequency and the oil cooler heat exchanger tube between the excitation peak frequency of lubricating oil is default described second
Except range.
2. method according to claim 1, which is characterized in that further include:
If the difference between the fluctuation pressure crest frequency of the cooling water and the intrinsic frequency of the steam turbine heat exchanger tube is in institute
It states except the first preset range, and lubricating oil in the fluctuation pressure crest frequency of the cooling water and the oil cooler heat exchanger tube
Difference between excitation peak frequency is except second preset range, then the value of the preset concentration is 0.
3. method according to claim 1 or claim 2, which is characterized in that the preset concentration obtains in the following way:
The fluctuation pressure crest frequency of cooling water after long-chain polymer is added is obtained, the pulsation of cooling water after long-chain polymer is added
Long-chain is added except first preset range in the difference of pressure peak frequency and the intrinsic frequency of the oil cooler heat exchanger tube
After polymer in the fluctuation pressure crest frequency of cooling water and the oil cooler heat exchanger tube excitation peak frequency of lubricating oil difference
Except second preset range；
According to be added long-chain polymer after cooling water fluctuation pressure crest frequency and default corresponding relationship, obtain it is described preset it is dense
The value of degree, the default corresponding relationship are long-chain polymer concentration and the fluctuation pressure peak value that cooling water after long-chain polymer is added
Corresponding relationship between frequency.
4. method according to claim 1, which is characterized in that before the fluctuation pressure crest frequency for obtaining cooling water,
Further include:
Obtain the fluctuation pressure time domain data of the cooling water；
Spectrum Conversion is carried out to the fluctuation pressure time domain data of the cooling water, obtains the fluctuation pressure frequency spectrum of the cooling water；
According to the fluctuation pressure frequency spectrum of the cooling water, the fluctuation pressure crest frequency of the cooling water is obtained.
5. method according to claim 4, which is characterized in that the fluctuation pressure time domain data tool for obtaining the cooling water
Body obtains in the following way:
The fluctuation pressure time domain data of the cooling water is obtained by oscillatory pressure pick-up.
6. method according to claim 1, which is characterized in that the intrinsic frequency of the oil cooler heat exchanger tube includes that several ranks are solid
There is frequency.
7. method according to claim 1, which is characterized in that the fluctuation pressure peak value frequency of cooling water after long-chain polymer is added
Rate is 60HZ.
8. method according to claim 1, which is characterized in that the preset concentration of the long-chain polymer is 0.05%.
9. a kind of control system of oil cooler cooling water excitation heat exchange tube vibration characterized by comprising
Module is obtained, for obtaining the fluctuation pressure crest frequency of cooling water in the pipeline of oil cooler cooling water inlet；
Adjustment module, if between the fluctuation pressure crest frequency of the cooling water and the intrinsic frequency of oil cooler heat exchanger tube
Difference is within the first preset range, or, moistening in the fluctuation pressure crest frequency of the cooling water and the oil cooler heat exchanger tube
Difference between the excitation peak frequency of lubricating oil is within the second preset range, then into oil cooler cooling water inlet pipeline
Be added preset concentration long-chain polymer so that be added long-chain polymer after cooling water fluctuation pressure crest frequency with it is described
Difference between the intrinsic frequency of steam turbine heat exchanger tube makes after long-chain polymer is added except first preset range
Difference in the fluctuation pressure crest frequency of cooling water and the oil cooler heat exchanger tube between the excitation peak frequency of lubricating oil exists
Except second preset range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910266402.9A CN109969370B (en) | 2019-04-03 | 2019-04-03 | Control method and system for exciting vibration of heat exchange tube by cooling water of oil cooler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910266402.9A CN109969370B (en) | 2019-04-03 | 2019-04-03 | Control method and system for exciting vibration of heat exchange tube by cooling water of oil cooler |
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| Publication Number | Publication Date |
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| CN109969370A true CN109969370A (en) | 2019-07-05 |
| CN109969370B CN109969370B (en) | 2020-05-26 |
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| CN201910266402.9A Active CN109969370B (en) | 2019-04-03 | 2019-04-03 | Control method and system for exciting vibration of heat exchange tube by cooling water of oil cooler |
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| CN111928687A (en) * | 2020-07-22 | 2020-11-13 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Fluid channel structure of printed circuit board heat exchanger and printed circuit board heat exchanger |
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