CN206476080U - A kind of central chilled water unit of the ship based on variable-structure control - Google Patents
A kind of central chilled water unit of the ship based on variable-structure control Download PDFInfo
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- CN206476080U CN206476080U CN201720086709.7U CN201720086709U CN206476080U CN 206476080 U CN206476080 U CN 206476080U CN 201720086709 U CN201720086709 U CN 201720086709U CN 206476080 U CN206476080 U CN 206476080U
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Abstract
The utility model discloses a kind of central chilled water unit of ship based on variable-structure control, including marine main engine system, fresh water cooling pump, panel cooler, sea water pump and controller, marine main engine system passes through fresh water cooling pump connecting plate type cooler, panel cooler connecting bypass is switched, bypass cock connects marine main engine system and threeway valve control respectively, threeway valve control connects controller, controller connects man machine operation interface, panel cooler connects sea water pump, sea water pump is connected with sea water tank, the utility model novel in structural design, cooling water outlet temperature toning can effectively be avoided, the stability of strengthening system.
Description
Technical field
The utility model is related to marine engine control technology field, in specially a kind of ship based on variable-structure control
Entreat chilled water unit.
Background technology
Ship water cooling system is one of the dynamical system for ensureing Ship Power Equipment safe and reliable operation, its act on be to
Need the equipment of cooling to provide enough cooling waters, to take away the heat that equipment gives out, enable a device in certain temperature
In the range of normal reliable work.
The need for ensureing the navigation of the ship whole world, the design conditions of conventional central cooling system are ship 32 DEG C of the torrid zone
Waters is under full steam.But actual conditions are, the one side ship most of the time is navigated by water in the marine site less than 32 DEG C, the opposing party
Face ship is in the economical speed under main frame normal power point mostly again.When not using frequency control, main sea water pump exists for a long time
Run under the power being actually needed, cause mass energy to waste.Therefore design and adjusted in real time according to the working conditions change of ship
Save seawater pump discharge, it is ensured that marine engine outlet temperature is stablized relatively, so as to greatly reduce sea water pump energy expenditure.By with
Upper analysis integral central cooling water system for marine diesel engine sea water pump energy-saving and frequency-variable control is imperative.
Current ship Central Cooling Water System control system mainly has two kinds：1st, the central cooling water outlet temperature threeway of ship
Valve is controlled, it is ensured that cooling water outlet temperature is stable, and at 36 DEG C, sea water pump is in rated power full speed running, causes big energy wave
Take；2nd, the potentiality of the energy-conservation existed for ship Central Cooling Water System sea return, the production of Alfa Laval companies of Sweden
ENGARD control systems, (wherein two are double to three Taiwan Straits water pumps in the thermic load of central cooler control sea return
Fast pump, the 3rd be single speed pump), discharge capacity is 50% design discharge) open, stop, pole-changing control so that optimizing regulation seawater
Flow, to reach the effect of part energy-conservation.Its maximum is disadvantageous in that system is operated on off state, it is impossible to continuously adjusted
Speed.
Central cooling system is generally used in current ship cooling system, traditional central cooling system is generally PID controls
System, PID control defect the most obvious is exactly big inertia, easy overshoot.But for a control system, real-time is higher
The degree of regulation of system is higher, the big inertia caused by PID control in order to improve ship conventional central cooling system, easy overshoot
Characteristic, the utility model uses the variable-structure control for core based on cascade PID.
Utility model content
The purpose of this utility model is to provide a kind of ship based on variable-structure control central chilled water unit, to solve
The problem of being proposed in above-mentioned background technology.
To achieve the above object, the utility model provides following technical scheme：In a kind of ship based on variable-structure control
Entreat chilled water unit, including marine main engine system, fresh water cooling pump, panel cooler, sea water pump and controller, the ship
Host computer system passes through fresh water cooling pump connecting plate type cooler, the panel cooler connecting bypass switch, the bypass cock
Marine main engine system and threeway valve control are connected respectively, and the threeway valve control connects PID controller, the PID control
Device connects man machine operation interface, and the panel cooler connects sea water pump, and the sea water pump is connected with sea water tank, the sea water pump
Switched respectively by first pressure, second pressure switch, the 3rd pressure switch connect primary scene controller, secondary scene control
Device, the 3rd field controller, the primary scene controller, secondary scene controller, the 3rd field controller connect PID respectively
Controller.
It is preferred that, in addition to the first temperature sensor, second temperature sensor, three-temperature sensor, the 4th temperature biography
Sensor, first pressure sensor, second pressure sensor, first temperature sensor are arranged on marine main engine system and fresh water
Between cooling pump, and first temperature sensor connects PID controller, and the second temperature sensor is arranged on bypass cock
Side, and second temperature sensor connection PID controller, the three-temperature sensor, first pressure sensor difference
Panel cooler side is arranged on, and the three-temperature sensor, first pressure sensor connect PID controller respectively, institute
The 4th temperature sensor, second pressure sensor is stated to be separately positioned between panel cooler and sea water pump, and the 4th temperature
Degree sensor, second pressure sensor connect PID controller respectively.
It is preferred that, variable-structure controller is provided with the PID controller, the variable-structure controller includes the first main control
Device, secondary controller, frequency converter, heat exchanger, flow transmitter, the first temperature transmitter and segmentation end generator, first master
Controller input connects the first temperature transmitter output end, and it is defeated that the first master controller output end connects secondary controller respectively
Enter end and flow transmitter output end, the secondary controller output end connects inverter input respectively and segmentation end generator is defeated
Go out end, the inverter output terminal connects heat exchanger input and flow transmitter input, the heat exchanger output end respectively
Connect the first temperature transmitter input.
It is preferred that, the threeway valve control includes the second master controller, water outlet temperature sensor and the second temperature
Transmitter is spent, the second master controller input connects second temperature transmitter output end, the second master controller output
Connecting bypass switch is held, the bypass cock connects water outlet temperature sensor, the water outlet temperature sensor connection
Second temperature transmitter.
Compared with prior art, the beneficial effects of the utility model are：
(1) the utility model novel in structural design, can effectively avoid cooling water outlet temperature toning, strengthening system
Stability.
(2) the utility model is core using two sets of PID regulating systems, i.e. triple valve outlet temperature PID control and based on PID
The structure changes sea water pump control of the heart, two sets of control systems each work independently and interrelated, during any a set of failure, separately
A set of to work independently, it is ensured that navigation safety, it, which is associated, is to gather for the variable structure control algorithm of core based on PID
The position signalling of the feedback of triple valve, Discrete control is used according to the scope of position signalling, forces triple valve bypass to turn down, and allows big
Calorimetric water increases heat exchange area by plate type heat exchanger, improves heat exchange efficiency, so that it is real to substantially reduce frequency conversion seawater pump speed
Existing Energy Saving Control, when threeway valve opening reaches 95%, frequency converter puts into automatic running pattern, is exported according to panel cooler
Temperature is adjusted in real time.
Brief description of the drawings
Fig. 1 is the utility model structural representation；
Fig. 2 is PID controller control principle block diagram of the present utility model；
Fig. 3 is threeway valve control control principle block diagram of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
Fig. 1-3 are referred to, the utility model provides a kind of technical scheme：A kind of ship center based on variable-structure control is cold
But water installations, including marine main engine system 1, fresh water cooling pump 2, panel cooler 3, sea water pump 4 and PID controller 5, it is described
Marine main engine system 1 is by the connecting plate type cooler 3 of fresh water cooling pump 2, and the connecting bypass of panel cooler 3 switch 6 is described
Bypass cock 6 connects marine main engine system 1 and threeway valve control 7 respectively, and the threeway valve control 7 connects PID controller
5, the PID controller 5 connects man machine operation interface 8, and the panel cooler 3 connects sea water pump 4, the sea water pump 4 and sea
Water tank 9 is connected, and the sea water pump 4 is switched the 11, the 3rd pressure switch 12 and connected by first pressure switch 10, second pressure respectively
Primary scene controller 13, secondary scene controller 14, the 3rd field controller 15, the primary scene controller 13, second
Field controller 14, the 3rd field controller 15 connect PID controller 5 respectively.
In the present embodiment, in addition to the first temperature sensor 16, second temperature sensor 17, three-temperature sensor 18,
4th temperature sensor 19, first pressure sensor 20, second pressure sensor 21, first temperature sensor 16 are arranged on
Between marine main engine system 1 and fresh water cooling pump 2, and first temperature sensor 16 connection PID controller 5, described second
Temperature sensor 17 is arranged on the side of bypass cock 6, and the connection PID controller 5 of the second temperature sensor 17, the described 3rd
Temperature sensor 18, first pressure sensor 20 are separately positioned on the side of panel cooler 3, and the three-temperature sensor
18th, first pressure sensor 20 connects PID controller 5, the 4th temperature sensor 19,21 points of second pressure sensor respectively
It is not arranged between panel cooler 3 and sea water pump 4, and the 4th temperature sensor 19, second pressure sensor 21 are distinguished
Connect PID controller 5.
In the present embodiment, variable-structure controller is provided with PID controller 5, the variable-structure controller includes the first master control
Device 22 processed, secondary controller 23, frequency converter 24, heat exchanger 25, flow transmitter 26, the first temperature transmitter 27 and it is segmented end
Device 28, the input of the first master controller 22 connects the output end of the first temperature transmitter 27, and first master controller 22 is defeated
Go out end the connection input of secondary controller 23 and the output end of flow transmitter 26 respectively, the output end of secondary controller 23 is connected respectively
The input of frequency converter 24 and the segmentation output end of end generator 28, the output end of frequency converter 24 connect the input of heat exchanger 25 respectively
With the input of flow transmitter 26, the output end of heat exchanger 25 connects the input of the first temperature transmitter 27.
In addition, in the present embodiment, threeway valve control 7 includes the second master controller 29, water outlet temperature sensor 30
And second temperature transmitter 31, the input of the second master controller 29 connects the output end of second temperature transmitter 31, described
The output end connecting bypass of second master controller 29 switch 6, the connection water outlet of bypass cock 6 temperature sensor 30 is described
The connection second temperature of water outlet temperature sensor 30 transmitter 31.
The utility model uses serials control, according to the characteristics of serials control, and the less seawater flow of selection hysteresis quality is made
For secondary controlled variable, subloop is constituted；Using water outlet temperature as main controlled volume, major loop is constituted.The utility model is with PID
3 seawater pump operations are controlled to control seawater flow, the fresh water cooled that seawater need to will be cooled down by heat exchanger for controller.In order to
Ensure the safety of equipment, the temperature of low temperature fresh water can not be too low to prevent equipment and the low temperature fresh water excessive temperature differentials of cooling of being cooled
And cause device damage, but the running frequency of sea water pump can not possibly be reduced infinitely, while in order to ensure seawer outlet temperature not
Prevent seawater from saltouing beyond safety value (45 DEG C) and reduce heat exchanger heat exchange efficiency or cause heat exchanger to block.When sea water pump fortune
Row is when lower frequency limit (30Hz) is run, and system can not change sea water pump running frequency again, i.e., can not change seawater flow, now
If low temperature fresh water is too low by water outlet temperature after heat exchanger, the PID control of temperature control three-way valve itself can only be now relied on
To adjust temperature, the flow of increase hot water makes water outlet temperature reach preset value.When hot water aperture is 5%, in order to ensure
The stabilization of water outlet temperature, system is switched to by the operation of PID control sea water pump.In order to avoid system frequent switching, setting
Left in meter 2% return difference, i.e., when hot water aperture drops to 3% by 7%, sea water pump improve running frequency simultaneously add PID control
System, when only separate unit hot water pump operation and when hot water aperture is raised to 7% by 3%, sea water pump is run with 40Hz frequencies and exits PID
Control is by temperature control three-way valve itself PID control.
The utility model novel in structural design, can effectively avoid cooling water outlet temperature toning, strengthening system it is steady
It is qualitative；The utility model is using two sets of PID regulating systems, i.e. triple valve outlet temperature PID control and based on the change that PID is core
Structure sea water pump is controlled, and two sets control systems each work independently and interrelated, during any a set of failure, it is another set of can
To work independently, it is ensured that navigation safety, it, which is associated, is to gather triple valve based on PID for the variable structure control algorithm of core
Feedback position signalling, Discrete control is used according to the scope of position signalling, forces triple valve bypass to turn down, a large amount of hot water are allowed
Increase heat exchange area by plate type heat exchanger, improve heat exchange efficiency, so as to substantially reduce frequency conversion sea water pump velocity interpolation energy-conservation
Control, when threeway valve opening reaches 95%, frequency converter puts into automatic running pattern, is entered according to panel cooler outlet temperature
Row regulation in real time.
While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art,
It is appreciated that these embodiments can be carried out in the case where not departing from principle of the present utility model and spirit a variety of changes, repaiies
Change, replace and modification, scope of the present utility model is defined by the appended claims and the equivalents thereof.
Claims (4)
1. a kind of central chilled water unit of the ship based on variable-structure control, including marine main engine system (1), fresh water cooling pump
(2), panel cooler (3), sea water pump (4) and PID controller (5), it is characterised in that：The marine main engine system (1) is led to
Fresh water cooling pump (2) connecting plate type cooler (3) is crossed, panel cooler (3) connecting bypass switchs (6), and the bypass is opened
Close (6) and connect marine main engine system (1) and threeway valve control (7) respectively, the threeway valve control (7) connects PID control
Device (5), PID controller (5) the connection man machine operation interface (8), panel cooler (3) the connection sea water pump (4) is described
Sea water pump (4) is connected with sea water tank (9), and the sea water pump (4) switchs (10), second pressure by first pressure respectively and switched
(11), the 3rd pressure switch (12) connection primary scene controller (13), secondary scene controller (14), the 3rd field controller
(15), the primary scene controller (13), secondary scene controller (14), the 3rd field controller (15) connect PID respectively
Controller (5).
2. the central chilled water unit of a kind of ship based on variable-structure control according to claim 1, it is characterised in that：Also
Including the first temperature sensor (16), second temperature sensor (17), three-temperature sensor (18), the 4th temperature sensor
(19), first pressure sensor (20), second pressure sensor (21), first temperature sensor (16) are arranged on ship master
Between machine system (1) and fresh water cooling pump (2), and first temperature sensor (16) connection PID controller (5), described the
Two temperature sensors (17) are arranged on bypass cock (6) side, and the second temperature sensor (17) connection PID controller
(5), the three-temperature sensor (18), first pressure sensor (20) are separately positioned on panel cooler (3) side, and institute
State three-temperature sensor (18), first pressure sensor (20) and connect PID controller (5), the 4th TEMP respectively
Device (19), second pressure sensor (21) are separately positioned between panel cooler (3) and sea water pump (4), and the 4th temperature
Degree sensor (19), second pressure sensor (21) connect PID controller (5) respectively.
3. the central chilled water unit of a kind of ship based on variable-structure control according to claim 1, it is characterised in that：Institute
State and variable-structure controller is provided with PID controller (5), the variable-structure controller includes the first master controller (22), secondary regulation
Device (23), frequency converter (24), heat exchanger (25), flow transmitter (26), the first temperature transmitter (27) and segmentation end generator
(28), described first master controller (22) input connection the first temperature transmitter (27) output end, first master controller
(22) output end connects secondary controller (23) input and flow transmitter (26) output end respectively, and the secondary controller (23) is defeated
Go out end connection frequency converter (24) input and segmentation end generator (28) output end respectively, frequency converter (24) the output end difference
Heat exchanger (25) input and flow transmitter (26) input are connected, heat exchanger (25) output end connects the first temperature and become
Send device (27) input.
4. the central chilled water unit of a kind of ship based on variable-structure control according to claim 1, it is characterised in that：Institute
Stating threeway valve control (7) includes the second master controller (29), water outlet temperature sensor (30) and second temperature pick-up
Device (31), the second master controller (29) input connects second temperature transmitter (31) output end, second main control
Device (29) output end connecting bypass switchs (6), bypass cock (6) the connection water outlet temperature sensor (30), described light
Water outlet temperature sensor (30) connection second temperature transmitter (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720086709.7U CN206476080U (en) | 2017-01-23 | 2017-01-23 | A kind of central chilled water unit of the ship based on variable-structure control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720086709.7U CN206476080U (en) | 2017-01-23 | 2017-01-23 | A kind of central chilled water unit of the ship based on variable-structure control |
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| Publication Number | Publication Date |
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| CN206476080U true CN206476080U (en) | 2017-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720086709.7U Expired - Fee Related CN206476080U (en) | 2017-01-23 | 2017-01-23 | A kind of central chilled water unit of the ship based on variable-structure control |
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| CN (1) | CN206476080U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108105077A (en) * | 2017-12-27 | 2018-06-01 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of energy-saving type marine pump group intelligent management system and method |
| CN108167170A (en) * | 2017-12-13 | 2018-06-15 | 广新海事重工股份有限公司 | A kind of frequency control center salt water cooling system |
| CN108750064A (en) * | 2018-05-14 | 2018-11-06 | 广州航海学院 | A kind of ship center cooling water multistage ratio control system and method |
| CN108894964A (en) * | 2018-07-06 | 2018-11-27 | 葫芦岛海通电气设备制造有限公司 | A kind of frequency conversion sea water pump energy saver |
| CN109501997A (en) * | 2018-07-18 | 2019-03-22 | 上海锐机电有限公司 | Host cooling sea water pump frequency-changing control system |
| CN109733579A (en) * | 2019-03-05 | 2019-05-10 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Ship Central Cooling Water System and its control method and ship |
| CN113602467A (en) * | 2021-07-21 | 2021-11-05 | 中国船舶重工集团公司第七一九研究所 | Ship cooling system |
-
2017
- 2017-01-23 CN CN201720086709.7U patent/CN206476080U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167170A (en) * | 2017-12-13 | 2018-06-15 | 广新海事重工股份有限公司 | A kind of frequency control center salt water cooling system |
| CN108105077A (en) * | 2017-12-27 | 2018-06-01 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of energy-saving type marine pump group intelligent management system and method |
| CN108750064A (en) * | 2018-05-14 | 2018-11-06 | 广州航海学院 | A kind of ship center cooling water multistage ratio control system and method |
| CN108750064B (en) * | 2018-05-14 | 2023-09-08 | 广州航海学院 | Ship central cooling water multistage ratio control system and method |
| CN108894964A (en) * | 2018-07-06 | 2018-11-27 | 葫芦岛海通电气设备制造有限公司 | A kind of frequency conversion sea water pump energy saver |
| CN109501997A (en) * | 2018-07-18 | 2019-03-22 | 上海锐机电有限公司 | Host cooling sea water pump frequency-changing control system |
| CN109501997B (en) * | 2018-07-18 | 2022-06-28 | 上海锐一机电有限公司 | Frequency conversion control system and method for main engine cooling seawater pump |
| CN109733579A (en) * | 2019-03-05 | 2019-05-10 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Ship Central Cooling Water System and its control method and ship |
| CN109733579B (en) * | 2019-03-05 | 2023-11-03 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Ship central cooling water system, control method thereof and ship |
| CN113602467A (en) * | 2021-07-21 | 2021-11-05 | 中国船舶重工集团公司第七一九研究所 | Ship cooling system |
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