CN112177757A - Protection device of ship engine - Google Patents
Protection device of ship engine Download PDFInfo
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- CN112177757A CN112177757A CN202010985688.9A CN202010985688A CN112177757A CN 112177757 A CN112177757 A CN 112177757A CN 202010985688 A CN202010985688 A CN 202010985688A CN 112177757 A CN112177757 A CN 112177757A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P9/00—Cooling having pertinent characteristics not provided for in, or of interest apart from, groups F01P1/00 - F01P7/00
- F01P9/02—Cooling by evaporation, e.g. by spraying water on to cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/08—Temperature
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- General Engineering & Computer Science (AREA)
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- Thermal Sciences (AREA)
- Nonlinear Science (AREA)
- Automation & Control Theory (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a protective device of a ship engine, which comprises a ship engine body, wherein the bottom of the ship engine body is fixedly connected with a bottom plate, the left side and the right side of the top of the bottom plate are both fixedly connected with a support frame, the top of the right side of the support frame is fixedly connected with a movable cooling mechanism, the left side of the top of the bottom plate is fixedly connected with a water pump, the left side of the water pump is provided with a water tank, the bottom of the water tank is fixedly connected with the left side of the top of the bottom plate, the top of the water tank is communicated with a delivery. The ship engine body, the bottom plate, the support frame, the movable cooling mechanism, the water pump, the water tank and the conveying water pipe are matched for use, the problems that the service life and the operation stability are influenced due to high temperature when the engine runs and the operation effect is reduced due to the fact that the existing ship engine is lack of a protection device for maintenance are solved, and the ship engine has the advantage of being good in protection effect.
Description
Technical Field
The invention relates to the technical field of ship engines, in particular to a protection device of a ship engine.
Background
The marine diesel engine has high thermal efficiency, good economical efficiency, easy starting and great adaptability to various ships, and can be used as ship propulsion power soon after being published, and in the 50 th 20 th century, the diesel engine almost completely replaces a steam engine in newly built ships, the marine diesel engine is the main power of civil ships, medium and small ships and conventional submarines, the marine diesel engine can be divided into a main engine and an auxiliary engine according to the functions of the marine diesel engine in the ships, the main engine is used as the propulsion power of the ships, and the auxiliary engine is used for driving a generator, an air compressor or a water pump and the like.
The problems of the existing ship engine are as follows: lack protector and carry out the maintenance, lead to the high life and the operating stability that influence of engine operation temperature, reduced the operation effect.
Disclosure of Invention
In order to solve the problems in the background art, the invention aims to provide a protective device for a ship engine, which has the advantage of good protective effect and solves the problems that the service life and the operation stability are influenced by high temperature when the engine runs and the operation effect is reduced because the existing ship engine is lack of the protective device for maintenance.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a protection device of ship engine, includes the ship engine body, the bottom fixedly connected with bottom plate of ship engine body, the equal fixedly connected with support frame in left side and the right side at bottom plate top, the top fixedly connected with on support frame right side removes cooling mechanism, the left side fixedly connected with water pump at bottom plate top, the left side of water pump is provided with the water tank, the bottom of water tank and the left side fixed connection at bottom plate top, the top intercommunication of water tank has the conveying water pipe, the conveying water pipe is linked together with the input of water pump.
Preferably, the movable cooling mechanism comprises a motor, a screw is fixedly connected to the output end of the motor, a movable plate is sleeved on the surface of the screw, the movable plate is in threaded connection with the screw, metal hoses are fixedly connected to the front side and the rear side of the bottom of the movable plate, a spray head is communicated with the bottom of each metal hose, temperature detectors are fixedly connected to the front side and the rear side of the bottom of the movable plate, the detection heads of the temperature detectors are aligned to the surface of the ship engine body, and a handle is fixedly connected to the surface of the spray head.
Preferably, the inner side of the support frame is fixedly connected with a slide bar, and the slide bar is connected with the moving plate in a sliding manner.
Preferably, the left side and the right side of the surface of the screw are both fixedly connected with limiting rings, and one side of each limiting ring, which is close to the movable plate, is fixedly connected with a rubber pad.
Preferably, the output end of the water pump is communicated with a three-way joint, and two ends of the three-way joint, which are far away from the water pump, are communicated with the top of the metal hose through pipelines.
Preferably, the top of the bottom plate is fixedly connected with a collecting hopper, the right side of the water tank is communicated with the left side of the collecting hopper through a pipeline, and the left side of the inner wall of the collecting hopper is fixedly connected with a filter screen positioned on the right side of the pipeline.
Preferably, the temperature detector comprises a temperature measuring probe, a temperature detector shell and a temperature measuring circuit module;
the temperature measuring circuit module comprises a power supply module, a sampling circuit, a conversion circuit module, a single chip microcomputer and an output module;
the temperature measuring probe is positioned at the tip part of the temperature detector, the outer part of the temperature measuring probe is connected with the shell of the temperature detector, and the inner part of the temperature measuring probe is connected with the sampling circuit;
the power supply module is connected with the sampling circuit, the conversion circuit module, the singlechip and the output module;
one end of the sampling circuit is connected to the temperature measuring probe, and the other end of the sampling circuit is connected to the single chip microcomputer through the conversion circuit module;
the output module is connected with the singlechip;
the temperature measuring probe adopts a thermistor with positive temperature coefficient or negative temperature coefficient;
the shell of the temperature detector is made of ABS engineering plastic and is provided with an anticorrosive layer;
the power module provides power for the sampling circuit, the conversion circuit module, the single chip microcomputer and the output module.
Preferably, the sampling circuit has a built-in filter and an input filter network, the filter is connected to the power module based on the input filter network, and is configured to sample and obtain the voltage of the power module and the voltages at two ends of the temperature probe at a fixed time interval, the sampling circuit further has two voltage adjusting unit voltage buffers and capacitors, namely a first voltage adjusting unit and a second voltage adjusting unit, the two voltages input by the input filter network are input to the first voltage adjusting unit and the second voltage adjusting unit, then the two voltage adjusting units adjust the two input voltages by using respective electronic components, the two input voltages are input to a first transistor of the voltage buffer, and when the adjusted voltage is invalid, a second transistor of the voltage buffer receives the voltage after the second voltage adjustment, until the voltage value meets the voltage value required by the single chip microcomputer, the voltage value is output to the capacitor to enable the two voltages to be stable, and then the two voltages are output to the conversion circuit module;
the conversion circuit module is used for carrying out analog-to-digital conversion on the voltage sampled by the sampling circuit into a digital signal;
the single chip microcomputer is used for acquiring a difference signal between the voltage of the power supply module and the voltage at two ends of the temperature measuring probe according to the digital signal, outputting the ratio of the two voltage difference signals by using pulses, determining the surface temperature of the ship engine body and the temperature of the surrounding fluid of the engine under different working conditions according to the corresponding relation between the ratio of the two voltages and the temperature, and outputting the surface temperature and the temperature.
As a preferred aspect of the present invention, the protection device for a ship engine is characterized in that: further comprising: the monitoring system comprises a monitoring system circuit, a comparison module and a control module;
the monitoring system circuit is connected with the output module of the temperature detector and is used for monitoring the temperature of the engine under different working conditions in real time;
control module one end links to each other with the monitored control system circuit, and one end links to each other with the switch of shower head and motor for according to the comparison module comparison engine's real-time temperature and the safe operating temperature's of the engine under the corresponding operating mode comparison result, control shower head and motor and open or close simultaneously, it includes:
step 1: calculating according to the formula (1)
The heat consumption rate of the engine under different working conditions;
in the formula (I), the compound is shown in the specification,
specific heat consumption of the engine under different operating conditions, D0Is the main steam flow; h0The enthalpy value of the main steam is; hMAINThe enthalpy value of the main feed water of the boiler is represented; dZRThe flow rate of the hot section of the reheating steam pipeline is shown; hZRThe enthalpy value of the hot end of the reheat steam is; hZLIs the cold end enthalpy of the reheat steam; dMAThe water flow is chemical make-up water flow; hMASupplying water enthalpy value for chemical make-up; dGJThe flow rate is the overheat desuperheating water flow rate; hGJThe enthalpy value of the superheated desuperheating water is obtained; dZJIs reheating temperature-reducing water flow; hZJThe enthalpy value of the reheated desuperheating water is obtained; p is engine output power;
step 2: calculating the heat consumption rate of the engine under different working conditions according to the formula (2) and the step 1
Calculating the safe working temperature of the engine under different working conditions;
wherein T is the safe working temperature of the engine under different working conditions, T1Is the temperature of the surrounding fluid of the engine under different operating conditions, Q is the heat transfer percentage of the engine under different operating conditions,
for engines under different working conditionsSpecific heat consumption of hnThe heat value of surrounding fluid of the engine under different working conditions is low, alpha is the convective heat transfer coefficient under different working conditions, and A is the area of the cylinder body of the engine;
and step 3: and the comparison module compares the real-time temperature of the engine with the safe working temperature of the engine obtained by the calculation result of the step 2, and when the real-time temperature of the engine is higher than the safe working temperature of the engine, a signal is output to the control module, and the control module controls the spray header and the motor to be opened simultaneously according to the output signal so as to cool the engine. Compared with the prior art, the invention has the following beneficial effects:
1. the invention is characterized in that the ship engine body, the bottom plate, the support frame, the movable cooling mechanism, the water pump, the water tank and the delivery pipe are used in cooperation, so that a user can conveniently start the water pump to deliver water in the water tank to the inside of the metal hose through the three-way joint and spray through the spray head, then the user starts the motor to drive the screw to rotate, the screw rotates to drive the movable plate to move left and right, the movable plate drives the metal hose to move left and right, the metal hose drives the spray head to move left and right for spray cooling, and simultaneously the surface of the ship engine body is cleaned, so that the heat dissipation and cooling effects are ensured, the temperature measuring instrument detects the temperature on the surface of the ship engine body, the user can conveniently observe the temperature, the position of the spray head is adjusted by lifting the handle, the problem that the existing, the problem of operation effect has been reduced, possesses the advantage that the protecting effect is good.
2. According to the invention, the motor, the screw rod, the movable plate, the metal hose, the spray head, the thermometer detector and the handle are arranged, so that a user can start the motor to drive the screw rod to rotate, the screw rod rotates to drive the movable plate to move left and right, the movable plate drives the metal hose to move left and right, the metal hose drives the spray head to move left and right for spray cooling, meanwhile, the surface of the ship engine body is cleaned, the heat dissipation and cooling effects are ensured, the temperature measuring instrument detects the temperature of the surface of the ship engine body, the user can observe the temperature conveniently, and the handle is lifted.
3. According to the invention, the slide bar is arranged, so that a user can conveniently move and limit the movable plate through the slide bar, the movable plate is prevented from being overturned and shaken up and down, and the movement stability is improved.
4. According to the invention, the limiting ring and the rubber pad are arranged, so that a user can limit the limiting position of the moving plate through the limiting ring, and the rubber pad can prevent the moving plate from being knocked and damaged.
5. By arranging the three-way joint, a user can conveniently divide water at the output end of the water pump through the three-way joint and synchronously convey the water to the insides of the two metal hoses, so that the front side and the back side of the ship engine body can be synchronously cooled and cleaned.
6. According to the invention, the collecting hopper and the filter screen are arranged, so that a user can conveniently collect sprayed water through the collecting hopper, meanwhile, the filter screen filters particles in the water, the water can be conveniently conveyed to the interior of the water pump through the water tank again, and the sprayed water can be conveniently recycled.
7. The temperature monitor is arranged, so that the temperature of the engine can be accurately measured in real time, a monitoring system circuit can be willing to monitor the temperature of the generator in real time, the surface temperature of the engine body can be controlled, and the safety of the engine during working is enhanced.
8. The temperature of the generator can be monitored in real time conveniently by arranging the power supply module, the sampling circuit, the conversion circuit module, the single chip microcomputer and the output module, and compared with the safe working temperature, and when the temperature of the engine is overhigh, the spray header can be controlled to cool, so that the engine can work below the safe temperature for a long time.
9. According to the invention, by arranging the monitoring system circuit, the comparison module and the control module, the temperature of the engine under different working conditions is monitored in real time and is compared with the safe working temperature, and the spray header can be controlled to cool down when the temperature of the engine is too high, so that the functionality of the spray header is improved.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic top view of the screw of the present invention;
FIG. 3 is a schematic perspective view of a movable plate according to the present invention;
FIG. 4 is a schematic perspective view of the collecting hopper of the present invention;
FIG. 5 is a cross-sectional view of the temperature detector of the present invention;
FIG. 6 is a flow chart of the thermometry circuit module of the present invention.
In the figure: 1. a marine engine body; 2. a base plate; 3. a support frame; 4. a mobile cooling mechanism; 41. a motor; 42. a screw; 43. moving the plate; 44. a metal hose; 45. a shower head; 46. a temperature detector; 47. a handle; 5. a water pump; 6. a water tank; 7. a water delivery pipe; 8. a slide bar; 9. a limiting ring; 10. a rubber pad; 11. a three-way joint; 12. a collecting hopper; 13. a filter screen; 48. a temperature measuring probe; 49. a temperature detector housing; 50. a temperature measuring circuit module; 501. a sampling circuit; 502. a power supply module; 503. a conversion circuit module; 504. a single chip microcomputer; 505. and an output module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 4, the protection device for the ship engine provided by the invention comprises a ship engine body 1, wherein a bottom plate 2 is fixedly connected to the bottom of the ship engine body 1, a support frame 3 is fixedly connected to both the left side and the right side of the top of the bottom plate 2, a movable cooling mechanism 4 is fixedly connected to the top of the right side of the support frame 3, a water pump 5 is fixedly connected to the left side of the top of the bottom plate 2, a water tank 6 is arranged on the left side of the water pump 5, the bottom of the water tank 6 is fixedly connected to the left side of the top of the bottom plate 2, a water delivery pipe 7 is communicated with the top of the water tank 6.
Referring to fig. 1, the movable cooling mechanism 4 includes a motor 41, a screw 42 is fixedly connected to an output end of the motor 41, a movable plate 43 is sleeved on a surface of the screw 42, the movable plate 43 is in threaded connection with the screw 42, metal hoses 44 are fixedly connected to a front side and a rear side of a bottom of the movable plate 43, a shower head 45 is communicated with a bottom of the metal hose 44, temperature detectors 46 are fixedly connected to a front side and a rear side of a bottom of the movable plate 43, the temperature detectors 46 are aligned to a surface of the marine engine body 1, and a handle 47 is fixedly connected to a surface of the shower head 45.
As a technical optimization scheme of the invention, by arranging the motor 41, the screw 42, the movable plate 43, the metal hose 44, the spray header 45, the thermometer detector 46 and the handle 47, a user can start the motor 41 to drive the screw 42 to rotate, the screw 42 rotates to drive the movable plate 43 to move left and right, the movable plate 43 drives the metal hose 44 to move left and right, the metal hose 44 drives the spray header 45 to move left and right to perform spray cooling, meanwhile, the surface of the ship engine body 1 is cleaned, the heat dissipation and cooling effects are ensured, the temperature detector 46 detects the temperature on the surface of the ship engine body 1, the user can observe the temperature conveniently, and the handle 47 is lifted to adjust the position of the spray header 45.
Referring to fig. 2, a slide bar 8 is fixedly connected to the inner side of the supporting frame 3, and the slide bar 8 is slidably connected to the moving plate 43.
As a technical optimization scheme of the invention, the slide bar 8 is arranged, so that a user can conveniently move and limit the moving plate 43 through the slide bar 8, the moving plate 43 is prevented from being overturned and shaken up and down, and the moving stability is improved.
Referring to fig. 1, a limiting ring 9 is fixedly connected to both left and right sides of the surface of the screw rod 42, and a rubber pad 10 is fixedly connected to one side of the limiting ring 9 close to the moving plate 43.
As a technical optimization scheme of the invention, by arranging the limiting ring 9 and the rubber pad 10, a user can limit the limit position of the moving plate 43 through the limiting ring 9 conveniently, and the rubber pad 10 can prevent the moving plate 43 from being knocked and damaged.
Referring to fig. 1, the output end of the water pump 5 is communicated with a three-way joint 11, and both ends of the three-way joint 11 far away from the water pump 5 are communicated with the top of the metal hose 44 through pipelines.
As a technical optimization scheme of the invention, by arranging the three-way joint 11, a user can conveniently divide water at the output end of the water pump 5 through the three-way joint 11 and synchronously convey the water to the insides of the two metal hoses 44, so as to synchronously cool and clean the front and the back of the ship engine body 1.
Referring to fig. 4, a collecting hopper 12 is fixedly connected to the top of the bottom plate 2, the right side of the water tank 6 is communicated with the left side of the collecting hopper 12 through a pipeline, and a filter screen 13 located on the right side of the pipeline is fixedly connected to the left side of the inner wall of the collecting hopper 12.
As a technical optimization scheme of the invention, the collection hopper 12 and the filter screen 13 are arranged, so that a user can conveniently collect sprayed water through the collection hopper 12, meanwhile, the filter screen 13 filters particles in the water, the water can be conveniently conveyed to the inside of the water pump 5 through the water tank 6 again, and the sprayed water can be conveniently recycled.
The working principle and the using process of the invention are as follows: when the water tank is used, a user starts the water pump 5 to convey water inside the water tank 6 to the inside of the metal hose 44 through the three-way joint 11, the water is sprayed by the spraying head 45, then the user starts the motor 41 to drive the screw rod 42 to rotate, the screw rod 42 rotates to drive the movable plate 43 to move left and right, the movable plate 43 drives the metal hose 44 to move left and right, the metal hose 44 drives the spraying head 45 to move left and right to spray and cool, meanwhile, the surface of the ship engine body 1 is cleaned, the heat dissipation and cooling effects are guaranteed, the temperature measuring instrument 46 detects the temperature on the surface of the ship engine body 1, the user can conveniently observe the temperature, and the position of the.
In summary, the following steps: this protector of marine engine uses through the cooperation that sets up marine engine body 1, bottom plate 2, support frame 3, removal cooling mechanism 4, water pump 5, water tank 6 and delivery water pipe 7, has solved current marine engine and has lacked protector and maintain, and high temperature influences life and operating stability when leading to the engine operation, has reduced the problem of operation effect.
Referring to fig. 5 and 6, as a technical optimization solution of the present invention, the temperature detector 46 includes a temperature measuring probe 48, a temperature detector housing 49, and a temperature measuring circuit module 50;
the temperature measuring circuit module 50 comprises a power supply module 501, a sampling circuit 502, a conversion circuit module 503, a single chip microcomputer 504 and an output module 505;
the temperature probe 48 is positioned at the tip part of the temperature detector 46, the outer part of the temperature probe is connected with the temperature detector shell 49, and the inner part of the temperature probe is connected with the sampling circuit 502;
the power supply module 501 is connected with the sampling circuit 502, the conversion circuit module 503, the single chip microcomputer 504 and the output module 505;
one end of the sampling circuit 502 is connected to the temperature measuring probe 48, and the other end is connected to the single chip microcomputer 504 through the conversion circuit module 503;
the output module 505 is connected to the single chip microcomputer 504;
the temperature measuring probe 48 adopts a thermistor with positive temperature coefficient or negative temperature coefficient;
the temperature detector shell 49 is made of ABS engineering plastic and is provided with an anticorrosive layer;
the power supply module 501 provides power for the sampling circuit 502, the conversion circuit module 503, the single chip microcomputer 504 and the output module 505;
the working principle and the beneficial effects of the technical scheme are as follows:
the temperature detector comprises a temperature detector 46 which comprises a temperature measuring probe 48, a temperature detector shell 49 and a temperature measuring circuit module 50; the temperature of the engine is convenient to measure in real time, the working state that the temperature of the engine is too high is avoided, an effective protection device is arranged for the engine, the accuracy of temperature measurement is facilitated, the temperature detector shell 49 is made of ABS engineering plastics and is provided with an anticorrosive coating, the service life and the overhaul period of the temperature detector 46 are prolonged, and the effective protection of the engine is facilitated.
Referring to fig. 5 and 6, as a technical optimization scheme of the present invention, the sampling circuit 502 has a built-in filter and an input filter network, the filter is connected to the power module 501 based on the input filter network, and is configured to sample and obtain the voltage of the power module 501 and the voltages at two ends of the temperature probe 48 at a fixed time interval, the sampling circuit 502 further has two voltage adjusting unit voltage buffers and capacitors, i.e. a first voltage adjusting unit and a second voltage adjusting unit, the two voltages input by the input filter network are input to the first voltage adjusting unit and the second voltage adjusting unit correspondingly, then the two voltage adjusting units adjust the two input voltages by using respective electronic components, and input to a transistor one of the voltage buffer, when the adjusted voltages are invalid, the second transistor of the voltage buffer receives the voltage adjusted for the second time until the voltage meets the voltage value required by the single chip microcomputer 504, and then outputs the voltage to the capacitor so that the two voltages are stable, and then outputs the voltage to the conversion circuit module 503;
the conversion circuit module 503 is configured to perform analog-to-digital conversion on the voltage sampled by the sampling circuit into a digital signal;
the single chip microcomputer 504 is configured to obtain a difference signal between the voltage of the power module 501 and the voltage at the two ends of the temperature probe 48 according to the digital signal, output a ratio of the two voltage difference signals by using a pulse, determine the surface temperature of the ship engine body 1 and the temperature of the surrounding fluid of the engine under different working conditions according to a corresponding relationship between the ratio of the two voltages and the temperature, and output the temperature.
The working principle and the beneficial effects of the technical scheme are as follows:
the temperature measuring circuit module 50 comprises a power supply module 501, a sampling circuit 502, a conversion circuit module 503, a single chip microcomputer 504 and an output module 505; the sampling circuit 502 is provided with a built-in filter and an input filter network, is connected with the power module 501 based on the input filter network, and is used for simultaneously sampling and obtaining the voltage of the power module 501, and in addition, the port of the sampling circuit 502 is connected with the voltage difference between the two ends of the jaw of the temperature measuring probe 48, so that the voltage of the power module 501 and the voltage of the two ends of the temperature measuring probe 48 are alternately sampled at fixed time intervals; the conversion circuit module 503 is configured to perform analog-to-digital conversion on the voltage sampled by the sampling circuit into a digital signal; the single chip microcomputer 504 inputs the voltage of the power module 501 and the voltage difference signal at the two ends of the temperature measuring probe 48 by A/D conversion, outputs the ratio of the two voltages by pulse, and determines the surface temperature of the ship engine body 1 and the temperature of the surrounding fluid of the engine under different working conditions according to the corresponding relation between the ratio of the two voltages and the temperature; the output module 505 is used for outputting the surface temperature of the ship engine body 1 determined by the single chip microcomputer and the temperature of the surrounding fluid of the engine under different working conditions. The temperature of the engine can be conveniently measured in real time, the working state that the temperature of the engine is too high is avoided, an effective protection device is arranged for the engine, and the accuracy of temperature measurement is facilitated.
As a technical optimization scheme of the invention, the protection device for the ship engine is characterized in that: further comprising: the monitoring system comprises a monitoring system circuit, a comparison module and a control module;
the monitoring system circuit is connected with the output module 505 of the temperature detector 46 and is used for monitoring the temperature of the engine under different working conditions in real time;
control module one end links to each other with the monitored control system circuit, and one end links to each other with the switch of shower head 45 and motor 41 for according to the comparison module comparison engine's real-time temperature and the safe operating temperature's of the engine under the corresponding operating mode result of comparison, control shower head 45 and motor 41 and open or close simultaneously, it includes:
step 1: calculating according to the formula (1)
The heat consumption rate of the engine under different working conditions;
in the formula (I), the compound is shown in the specification,
specific heat consumption of the engine under different operating conditions, D0Is the main steam flow; h0The enthalpy value of the main steam is; hMAINThe enthalpy value of the main feed water of the boiler is represented; dZRThe flow rate of the hot section of the reheating steam pipeline is shown; hZRThe enthalpy value of the hot end of the reheat steam is; hZLFor reheating steamCold end enthalpy; dMAThe water flow is chemical make-up water flow; hMASupplying water enthalpy value for chemical make-up; dGJThe flow rate is the overheat desuperheating water flow rate; hGJThe enthalpy value of the superheated desuperheating water is obtained; dZJIs reheating temperature-reducing water flow; hZJThe enthalpy value of the reheated desuperheating water is obtained; p is engine output power;
step 2: calculating the heat consumption rate of the engine under different working conditions according to the formula (2) and the step 1
Calculating the safe working temperature of the engine under different working conditions;
wherein T is the safe working temperature of the engine under different working conditions, T1Is the temperature of the surrounding fluid of the engine under different operating conditions, Q is the heat transfer percentage of the engine under different operating conditions,
is the heat consumption rate h of the engine under different working conditionsnThe heat value of surrounding fluid of the engine under different working conditions is low, alpha is the convective heat transfer coefficient under different working conditions, and A is the area of the cylinder body of the engine;
and step 3: and the comparison module compares the real-time temperature of the engine with the safe working temperature of the engine obtained by the calculation result of the step 2, and when the real-time temperature of the engine is higher than the safe working temperature of the engine, a signal is output to the control module, and the control module controls the spray header 45 and the motor 41 to be opened simultaneously according to the output signal so as to cool the engine.
The working principle and the beneficial effects of the technical scheme are as follows: first, step 1 calculates according to formula (1)
Calculating the heat consumption rate of the engine under different working conditions according to the formula (2) and the step 1 in the step 2Calculated heat consumption rate of engine under different working conditions
And (3) calculating the safe working temperature of the engine under different working conditions, comparing the real-time temperature of the engine with the safe working temperature of the engine obtained by the calculation in the step (2) by the comparison module, outputting a signal to the control module when the real-time temperature of the engine is higher than the safe working temperature of the engine, and controlling the spray header 45 and the motor 41 to be opened simultaneously by the control module to cool the engine. The problem of current ship engine lack protector and carry out the maintenance, lead to the high influence life of temperature and operating stability when the engine moves, reduced the operation effect is solved, possess the advantage that the protecting effect is good.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A protection device of a ship engine comprises a ship engine body (1), and is characterized in that: the bottom fixedly connected with bottom plate (2) of boats and ships engine body (1), the equal fixedly connected with support frame (3) in left side and right side at bottom plate (2) top, top fixedly connected with on support frame (3) right side removes cooling body (4), left side fixedly connected with water pump (5) at bottom plate (2) top, the left side of water pump (5) is provided with water tank (6), the bottom of water tank (6) and the left side fixed connection at bottom plate (2) top, the top intercommunication of water tank (6) has delivery pipe (7), delivery pipe (7) are linked together with the input of water pump (5).
2. The marine engine guard according to claim 1, wherein: remove cooling mechanism (4) including motor (41), output fixedly connected with screw rod (42) of motor (41), the surface cover of screw rod (42) is equipped with movable plate (43), movable plate (43) and screw rod (42) threaded connection, the equal fixedly connected with metal collapsible tube (44) of front side and rear side of movable plate (43) bottom, the bottom intercommunication of metal collapsible tube (44) has shower head (45), the equal fixedly connected with temperature-detecting instrument (46) of front side and rear side of movable plate (43) bottom, the surface of marine engine body (1) is aimed at to the detection head of temperature-detecting instrument (46), the fixed surface of shower head (45) is connected with handle (47).
3. The marine engine guard according to claim 2, wherein: the inner side of the support frame (3) is fixedly connected with a slide bar (8), and the slide bar (8) is in sliding connection with a moving plate (43).
4. The marine engine guard according to claim 2, wherein: the left side and the right side on the surface of the screw rod (42) are both fixedly connected with limiting rings (9), and one side, close to the moving plate (43), of each limiting ring (9) is fixedly connected with a rubber pad (10).
5. The marine engine guard according to claim 2, wherein: the output end of the water pump (5) is communicated with a three-way joint (11), and two ends, far away from the water pump (5), of the three-way joint (11) are communicated with the top of the metal hose (44) through pipelines.
6. The marine engine guard according to claim 1, wherein: the top fixedly connected with of bottom plate (2) collects fill (12), the right side of water tank (6) is linked together through the left side of pipeline with collecting fill (12), the left side fixedly connected with of collecting fill (12) inner wall is located filter screen (13) on pipeline right side.
7. The marine engine guard according to claim 2, wherein: the temperature detector (46) comprises a temperature measuring probe (48), a temperature detector shell (49) and a temperature measuring circuit module (50);
the temperature measurement circuit module (50) comprises a power supply module (501), a sampling circuit (502), a conversion circuit module (503), a singlechip (504) and an output module (505);
the temperature measuring probe (48) is positioned at the tip part of the temperature detector (46), the outer part of the temperature measuring probe is connected with the shell (49) of the temperature detector, and the inner part of the temperature measuring probe is connected with the sampling circuit (502);
the power supply module (501) is connected with the sampling circuit (502), the conversion circuit module (503), the singlechip (504) and the output module (505);
one end of the sampling circuit (502) is connected to the temperature measuring probe (48), and the other end of the sampling circuit is connected to the singlechip (504) through the conversion circuit module (503);
the output module (505) is connected with the single chip microcomputer (504);
the temperature measuring probe (48) adopts a thermistor with positive temperature coefficient or negative temperature coefficient;
the temperature detector shell (49) is made of ABS engineering plastic and is provided with an anticorrosive layer;
the power module (501) provides power for the sampling circuit (502), the conversion circuit module (503), the singlechip (504) and the output module (505).
8. The marine engine guard according to claim 7, wherein:
the sampling circuit (502) is provided with a built-in filter and an input filter network, the filter is connected with the power supply module (501) based on the input filter network and is used for simultaneously sampling and obtaining the voltage of the power supply module (501) and the voltages at two ends of the temperature measuring probe (48) at fixed time intervals, two voltage adjusting unit voltage buffers and capacitors, namely a first voltage adjusting unit and a second circuit adjusting unit, are further arranged in the sampling circuit (502), the two voltages input by the input filter network are correspondingly input into the first voltage adjusting unit and the second circuit adjusting unit, then the two voltage adjusting units can adjust the two input voltages by utilizing respective electronic elements and input into a first transistor of the voltage buffer, and when the adjusted voltages are invalid, the second transistor of the voltage buffer receives the voltages after the second voltage adjustment, until the voltage value meets the voltage value required by the single chip microcomputer (504), the voltage value is output to the capacitor to enable the two voltages to be stable, and then the two voltages are output to the conversion circuit module (503);
the conversion circuit module (503) is used for performing analog-to-digital conversion on the voltage sampled by the sampling circuit into a digital signal;
the single chip microcomputer (504) is used for acquiring a difference signal between the voltage of the power module (501) and the voltage at two ends of the temperature measuring probe (48) according to the digital signal, outputting the ratio of the voltage difference signal between the two voltage difference signals by using pulses, and determining and outputting the surface temperature of the ship engine body (1) and the temperature of the surrounding fluid of the engine under different working conditions according to the corresponding relation between the ratio of the two voltages and the temperature.
9. The marine engine guard according to claim 7, wherein: further comprising: the monitoring system comprises a monitoring system circuit, a comparison module and a control module;
the monitoring system circuit is connected with the output module (505) of the temperature detector (46) and is used for monitoring the temperature of the engine under different working conditions in real time;
control module one end links to each other with the monitored control system circuit, and one end links to each other with shower head (45) and motor (41), is used for according to the comparison module comparison engine real-time temperature and the safe operating temperature's of the engine under the corresponding operating mode result of comparison, control shower head (45) and motor (41) work, and it includes:
step 1: calculating the heat consumption rate of the engine under different working conditions according to the formula (1)
In the formula (I), the compound is shown in the specification,
specific heat consumption of the engine under different operating conditions, D0The main steam flow under different working conditions; h0The enthalpy value of the main steam under different working conditions; hMAINThe enthalpy value of the main feed water of the boiler under different working conditions; dZRThe flow rate of the hot section of the reheat steam pipeline under different working conditions is obtained; hZRThe enthalpy value of the hot end of the reheated steam under different working conditions; hZLThe enthalpy value of the reheating steam cold end under different working conditions; dMAThe chemical make-up water flow under different working conditions; hMASupplying water enthalpy value for chemical make-up under different working conditions; dGJThe flow rate is the flow rate of the overheating temperature-reducing water under different working conditions; hGJThe enthalpy value of the superheated desuperheating water under different working conditions is obtained; dZJThe reheating temperature-reducing water flow under different working conditions; hZJThe enthalpy value of the reheated desuperheating water under different working conditions is obtained; p is the output power of the engine under different working conditions;
step 2: calculating the heat consumption rate of the engine under different working conditions according to the formula (2) and the step 1
Calculating the safe working temperature of the engine under different working conditions;
wherein T is the engineSafe working temperature, T, under different working conditions1Is the temperature of the surrounding fluid of the engine under different operating conditions, Q is the heat transfer percentage of the engine under different operating conditions,
is the heat consumption rate h of the engine under different working conditionsnThe heat value of surrounding fluid of the engine under different working conditions is low, alpha is the convective heat transfer coefficient under different working conditions, and A is the area of the cylinder body of the engine;
and step 3: and the comparison module compares the real-time temperature of the engine with the safe working temperature of the engine calculated in the step 2, when the real-time temperature of the engine is higher than the safe working temperature of the engine, a signal is output to the control module, and the control module controls the spray header (45) and the motor (41) to be opened simultaneously according to the output signal so as to cool the engine.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113064371A (en) * | 2021-03-23 | 2021-07-02 | 博鼎汽车科技(山东)有限公司 | Ship engine heat management system controlled by monitor and implementation method thereof |
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