WO2020105105A1 - ドラフトメーター及び船舶 - Google Patents
ドラフトメーター及び船舶Info
- Publication number
- WO2020105105A1 WO2020105105A1 PCT/JP2018/042772 JP2018042772W WO2020105105A1 WO 2020105105 A1 WO2020105105 A1 WO 2020105105A1 JP 2018042772 W JP2018042772 W JP 2018042772W WO 2020105105 A1 WO2020105105 A1 WO 2020105105A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- draft
- data
- pressure
- air
- air chamber
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B79/00—Monitoring properties or operating parameters of vessels in operation
- B63B79/10—Monitoring properties or operating parameters of vessels in operation using sensors, e.g. pressure sensors, strain gauges or accelerometers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
- B63B17/0027—Tanks for fuel or the like ; Accessories therefor, e.g. tank filler caps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
- B63B39/12—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude for indicating draught or load
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B49/00—Arrangements of nautical instruments or navigational aids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/002—Sealings comprising at least two sealings in succession
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3296—Arrangements for monitoring the condition or operation of elastic sealings; Arrangements for control of elastic sealings, e.g. of their geometry or stiffness
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
- G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
- G06F7/544—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices for evaluating functions by calculation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/32—Other parts
- B63H23/321—Bearings or seals specially adapted for propeller shafts
- B63H2023/327—Sealings specially adapted for propeller shafts or stern tubes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
Definitions
- the present disclosure relates to a draft meter and a ship equipped with the draft meter.
- IoT Internet of Things
- the draft of a ship since the draft constantly changes during loading and unloading of cargo when the ship is stopped or during navigation, it is a main factor that makes realization of IoT difficult because it is difficult to identify the draft in real time.
- a conventional method for identifying the draft of a ship is, for example, providing a mark on the outer plate on the port side of the ship so that the measurer is close to the ship moored on a small boat and the distance between the mark and the water surface. Is performed by a measuring person using a draft measuring device (for example, refer to Patent Document 1).
- the present disclosure aims to provide a draft meter and a ship that can specify a draft that can fluctuate at any time.
- One aspect of the draft meter according to the present disclosure is A plurality of seal rings are arranged around the propeller shaft at intervals in the axial direction of the propeller shaft, and an air chamber and an oil chamber are provided in order from the stern side by the plurality of seal rings, and the air control unit uses an air A draft meter used for a ship having a pressure gauge for measuring the pressure of the air chamber, which is in communication with the air chamber via a supply path,
- the draft meter has a data storage unit and a calculation unit, In the data storage unit, predetermined correction data and seawater density data are stored and pressure data measured by the pressure gauge is input. A difference value between the pressure data and the correction data is calculated by the calculation unit, and the difference value is divided by the seawater density data to specify the draft of the ship.
- FIG. 1 is a diagram showing an example of the system configuration of the ship according to the embodiment
- FIG. 2 is an explanatory diagram for explaining the configuration of the seal ring and the tightening force and flow path resistance.
- a ship 200 has a stern tube sealing device 10 around a propeller shaft 3, and as an inboard device, an air control unit 30, an oil tank unit 60, an oil pump unit 70, and a drain. It mainly has a recovery unit 80 and a draft meter 100.
- a bearing 2 is provided inside the stern tube 1, the propeller shaft 3 is rotatably supported via the bearing 2, and the propeller 5 is fixed at the stern end of the propeller shaft 3.
- a liner 4 is fitted around the propeller shaft 3, and a cylindrical housing 7 that concentrically surrounds the liner 4 is arranged on the outer peripheral side of the liner 4.
- the housing 7 is fixed to the stern tube 1 with bolts. ing.
- the stern tube seal device 10 includes a housing 7, a packing ring 8, and four seal rings 9 (first seal ring 9A, second seal ring 9B, third seal ring 9C, and fourth seal ring in order from the stern side). 9D).
- the housing 7 is formed of six divided housings 6, and each of the divided housings 6 is a cylindrical member and is fixed to the stern tube 1 in a state of being fitted to each other and stacked in the axial direction of the propeller shaft 3. It Further, each of the split housings 6 forms an annular groove 6a as shown in FIG. 2 when fitted to an adjacent split housing 6, and the seal ring 9 is held in the annular groove 6a.
- the packing ring 8 is formed of an annular elastic member and is fitted on the liner 4. The packing ring 8 rotates together with the liner 4 and comes into sliding contact with the housing 7, and prevents foreign matter such as a fishing net from entering the stern tube sealing device 10 and the stern tube 1.
- the seal ring 9 has a key portion 9a, an arm portion 9b, and a lip portion 9c.
- the key portion 9a is formed on the outer peripheral side end portion of the seal ring 9, and is fitted and retained in the annular groove 6a.
- the arm portion 9b is formed so as to extend from the key portion 9a toward the liner 4 side and further bend to extend toward the stern side. Since the second seal ring 9B is shown in FIG. 2, the key portion 9a is bent and extends toward the stern side, but the key portions 9a of the third seal ring 9C and the fourth seal ring 9D are reversed. Bend to the bow side.
- the lip portion 9c is formed on the inner peripheral side end portion of the arm portion 9b, and the first side surface 9c1 thereof faces the liner 4.
- the second side surface 9c2 opposite to the liner 4 has a spring groove 9c3, and the second seal ring 9B is tightened to the liner 4 side by the annular spring 9d fitted in the spring groove 9c3.
- a rubber material or a resin material other than rubber can be mentioned.
- the rubber material include nitrile rubber (NBR), fluororubber (FR), natural rubber (NR) and isobrene rubber (IR), butadiene rubber (BR), styrene-butadiene rubber (SBR) and the like.
- resin materials other than rubber include polytetrafluoroethylene (PTFE), polyether ether ketone (PEEK), fluororesins, and polyamide (PA).
- the first seal ring 9A and the second seal ring 9B are arranged with their lips facing toward the stern side, and the third seal ring 9C and the fourth seal ring 9D are arranged with their lips facing toward the bow side.
- An annular chamber is formed between the adjacent seal rings 9, 9, and the first air chamber 20A, the second air chamber 20B (both are examples of air chambers), and the first oil are sequentially arranged from the stern side.
- a chamber 20C (an example of an oil chamber) is formed.
- a stern tube sealing device having three seal rings 9 may be used.
- the first seal ring from the stern side is arranged with its lip portion facing the stern side.
- the second and third seal rings are arranged with their lips facing the bow side.
- An air supply passage 51 extending from the air control unit 30 communicates with the second air chamber 20B, and the air provided from the air source 38 passes through the air control unit 30 and the second air supply passage 51 through the air supply passage 51. It is supplied to the air chamber 20B. Then, the supplied air sequentially pushes up the lip portions of the second seal ring 9B and the first seal ring 9A to discharge the air into the seawater.
- the oil supply path 56 communicates with the first oil chamber 20C, and the lubricating oil supplied from the oil tank unit 60 is supplied to the oil pump unit 70 via the oil supply path 55, and the oil pump unit 70 Lubricating oil is supplied to the first oil chamber 20C via the oil supply passage 56.
- the oil supply path 56 is branched on the secondary side of the oil pump unit 70, the lubricating oil is supplied to the first oil chamber 20C through one oil supply path 56, and the other through the other oil supply path 56.
- Lubricating oil is supplied to the third oil chamber 20E.
- the lubricating oil improves the sliding of the bearing 2.
- the lubricating oil provided to the third oil chamber 20E is supplied to the second oil chamber 20D which is an annular chamber formed between the fourth seal ring 9D and the bearing 2 on the stern side of the bearing 2.
- An oil return path 54 communicates with the third oil chamber 20E, and the lubricating oil is collected in the oil tank unit 60 via the oil return path 54.
- the air control unit 30 includes a filter 31, a regulator 32, a flow meter 33, a flow controller 34, a check valve 35, and a valve 36 that is normally open in order from the air source 38 toward the second air chamber 20B. And have. Then, the regulator 32 executes pressure control to the extent that the air pressure of the air (compressed air) supplied to the second air chamber 20B does not become too high.
- the flow controller 34 adjusts the flow rate of the air so that the second air chamber 20B can maintain a constant differential pressure with respect to the constantly changing seawater pressure with respect to the seawater pressure fluctuation. Is supplied.
- the air chamber pressures of the first air chamber 20A and the second air chamber 20B are always kept higher than the seawater pressure by a constant pressure, and finally air is discharged to the stern side to prevent the intrusion of seawater. It is supposed to do.
- the air control unit 30 is connected to the oil tank 61 constituting the oil tank unit 60 from the secondary side of the regulator 32 via the pressurizing path 52.
- an air relay (pressure adjusting valve) 37 is provided in the middle of the pressurizing passage 52, and the pressure input signal passage 53 is drawn out from the secondary side of the pressurizing passage connecting portion in the air supply passage 51. It is connected to the air relay 37.
- the air relay 37 controls the chamber pressure of the oil tank 61 to be slightly higher than that of the air supply passage 51 (in other words, the oil chamber pressure of the first oil chamber 20C is higher than that of the second air chamber 20B). Control so that the height is slightly higher), and foreign matter is prevented from entering the first oil chamber 20C.
- the oil tank unit 60 has an oil tank 61 and a valve 62 that is open in a normal state and is interposed in the oil return path 54.
- the pressure is controlled to be always higher than the seawater pressure and the air chamber pressures of the first air chamber 20A and the second air chamber 20B.
- the oil chamber pressure of the first oil chamber 20C is controlled to be always higher than the air chamber pressure of the second air chamber 20B by a constant pressure, and the lip portion of the third seal ring 9C faces the bow side.
- the lubricating oil in the first oil chamber 20C can constantly press the lip portion of the third seal ring 9C against the liner 4.
- the lip portion of the third seal ring 9C is always in sliding contact with the liner 4, and the leakage of lubricating oil from the first oil chamber 20C to the second air chamber 20B is prevented.
- the oil pump unit 70 includes, in order from the oil tank 61 side, a filter 71, a circulation pump 72, a cooler 73, and a valve 74 that is normally open at a position where an oil supply path 56 extending from the cooler 73 branches. ..
- the oil pump unit 70 supplies the lubricating oil supplied from the oil tank unit 60 to the first oil chamber 20C and the third oil chamber 20E, and slides between the liner 4 and the third seal ring 9C and the fourth seal ring 9D. Lubricating oil is supplied to the second oil chamber 20D through the moving surface. Then, by returning the lubricating oil from the third oil chamber 20E to the oil tank unit 60 via the oil return passage 54, the lubricating oil is constantly circulated.
- the drain recovery unit 80 opens in the middle of the drain passage 57 and the drain passage 57 communicating with the second air chamber 20B so as to discharge these fluids when seawater or lubricating oil enters the second air chamber 20B. And a valve 83 that opens.
- the drain collection unit 80 further has a drain discharger 81 (auto drain) and a needle valve 82, so that the drain discharger 81 collects seawater, lubricating oil, etc., and automatically discharges when a fixed amount is accumulated. It has become.
- the drain recovery unit 80 discharges only air from the second air chamber 20B in normal times. However, if seawater or lubricating oil leaks into the second air chamber 20B, the pressurized air is slightly discharged via the needle valve 82 that is always open, and the leaked seawater or lubricating oil is drained. Collected by the unit 80.
- the ship 200 has a pressure gauge 40 in the air supply path 51.
- the pressure gauge 40 is provided in the air supply path 51 in the air control unit 30, but the pressure gauge 40 is provided near the entrance of the second air chamber 20B of the air supply path 51.
- the pressure gauge 40 may be installed inside the second air chamber 20B or inside the first air chamber 20A.
- the pressure gauge 40 constantly measures the pressure in the air chambers such as the second air chamber 20B and the first air chamber 20A.
- the ship 200 has a draft meter 100.
- pressure data in the air chamber that is constantly measured is transmitted to the draft meter 100, and the draft meter 100 specifies the draft based on the pressure data.
- FIG. 3 is an explanatory view for explaining the pressure following operation by the flow controller that constitutes the air control unit.
- FIG. 4 is an explanatory diagram for explaining the control mechanism of the air chamber pressure by the flow controller when the draft becomes deep and when the draft becomes shallow.
- the flow controller 34 has a needle valve 34a and a diaphragm 34b, and the gap C between the diaphragms 34b can be increased in the Y1 direction or decreased in the Y2 direction by operating pressure.
- the flow controller 34 has a function of maintaining the same air flow rate Q even when the air pressure P2 on the inlet side provided from the air source 38 is constant and the air pressure P2 on the outlet side changes.
- the gap h is almost the same as long as the air flow rate Q passing through the gap h between the lip portion 9c and the liner 4 does not change, and is the same as the air pressure P3 of the rear side first air chamber 20A.
- the pressure difference (P3-Pw) of the seawater pressure Pw on the front side is kept almost constant.
- the flow controller 34 immediately widens the gap C between the diaphragms 34b in order to maintain a constant flow rate, so the outlet pressure P2 and the air flow rate Q return to their original values.
- the pressure difference (P3 ⁇ Pw) on the front and back sides of the seal ring 9A also returns to the initial value again, and the air chamber pressure P3 follows the increase in the seawater pressure Pw. ..
- the pressure following operation by the air control unit 30 when the draft becomes deep can be performed without a time delay.
- the pressure follow-up operation by the air control unit 30 is similarly performed even when the draft becomes shallow and the seawater pressure Pw becomes low. In this case as well, the pressure follow-up operation by the air control unit 30 is executed without a time delay. To be done.
- the flow controller 34 controls the air flow rate Q provided to the air chamber to be constant in order to respond to the fluctuation of the draft, regardless of the fluctuation of the draft (fluctuation of seawater pressure), A stable flow path is secured between the seal ring 9 and the liner 4. Therefore, the flow path resistance F shown in FIG. 2 can be substantially constant.
- the tension T is constantly acting on the seal ring 9.
- the tension T can be variously changed depending on the form of the seal ring, as described in detail below.
- the cross-sectional shape of the seal ring, the material, the form of the annular spring, the seal ring diameter, etc. are factors that determine the form of the seal ring, and there is a tightening force T corresponding to the form of the seal ring.
- the flow path resistance may change due to a change in the cross-sectional shape of the seal ring, for example.
- the correction value ⁇ is the sum of the straining force T depending on the form of the seal ring used and the flow path resistance F that can be a substantially constant value as described above, and therefore the form of the seal ring
- ⁇ is the sum of the straining force T depending on the form of the seal ring used and the flow path resistance F that can be a substantially constant value as described above, and therefore the form of the seal ring
- the inventors of the present invention have so far conducted a laboratory experiment by applying a plurality of seal rings, and have specified that the range of ⁇ is in the range of 0.01 MPa to 0.03 MPa. Therefore, depending on the seal ring used, it is possible to apply ⁇ within the above numerical range, for example 0.015 MPa.
- the air chamber pressure (P3) is constantly measured by the pressure gauge 40, the air chamber pressure (P3) is calculated by the following equation (2) obtained by modifying the above equation (1). ) Can be used to specify seawater pressure (Pw).
- the seawater density can be specified as, for example, 1.025 ⁇ 10 ⁇ 3 kg / cm 3 , although it slightly varies depending on the seawater temperature and the like.
- the draft can be specified using the air chamber pressure (P3) by the following expression (3) using the seawater pressure (Pw) specified by the above expression (2) and the above seawater density.
- the draft meter 100 can specify the draft based on the pressure data regarding the air chamber pressure by the pressure gauge 40. Therefore, it is possible to specify the draft that can constantly fluctuate at any time, and it is possible to accumulate time-series data regarding the draft that is used for the IoT of the ship.
- FIG. 5 is a diagram showing an example of the hardware configuration of the draft meter according to the embodiment
- FIG. 6 is a diagram showing an example of the functional configuration of the draft meter according to the embodiment
- FIG. 7 is a diagram showing an example of the correction data stored in the data storage unit of the draft meter.
- the draft meter 100 includes a CPU (Central Processing Unit) 102, a ROM (Read Only Memory) 104, a RAM (Random Access Memory) 106, an auxiliary storage unit 108, a display unit 110, and a communication unit 112. Have.
- the respective units of the draft meter 100 are connected to each other via a bus 114.
- the CPU 102 executes various programs installed in the auxiliary storage unit 108.
- the ROM 104 is a non-volatile memory, and functions as a main storage unit that stores various programs and data necessary for the CPU 102 to execute the various programs stored in the auxiliary storage unit 108.
- the RAM 106 is a volatile memory and functions as a main storage unit. The RAM 106 functions as a work area when the CPU 102 executes various programs stored in the auxiliary storage unit 108.
- the auxiliary storage unit 108 stores various programs installed in the draft meter 100, data used when executing various programs, and the like.
- the display unit 110 displays a draft that can fluctuate at any time, and displays a time-series change graph of the draft as necessary.
- the air chamber pressure, ⁇ value, seawater density, etc. that are the basis for this are displayed.
- the communication unit 112 transmits the specified draft data to the server device or the like via the network, as described in detail below.
- the data collection unit 120 receives pressure data regarding the air chamber pressure measured by the pressure gauge 40.
- the received pressure data is temporarily stored in the data storage unit 140 from the data collection unit 120.
- the data storage unit 140 stores predetermined correction data and seawater density data.
- the correction data will be described with reference to FIG. 7.
- the correction data ⁇ is set by the addition value of the straining force value and the flow path resistance value determined by the form of the applied seal ring.
- the correction data ⁇ corresponding to the seal ring is specified.
- seal ring form No. 2 ..., Seal ring form No.
- N the respective elements that they have become the elements that determine the correction data ⁇ 2, ..., ⁇ N.
- the correction data ⁇ 1, ⁇ 2, ..., ⁇ N are specified by performing an indoor experiment using each type of seal ring.
- seawater was simulated on one side of the seal ring, an air chamber was installed on the other side of the seal ring, and air was provided by the flow controller so that the air flow rate was constant, and a stable flow path was secured.
- the correction data ⁇ can be specified by measuring the seawater pressure Pw and the air chamber pressure P3 at that time.
- the inventors of the present invention have so far conducted a laboratory experiment by applying a plurality of types of seal rings, and have specified that the range of ⁇ is in the range of 0.01 MPa to 0.03 MPa.
- the specified correction data ⁇ is stored in the data storage unit 140.
- the above-described 0.01 MPa to 0.03 MPa may be stored in the data storage unit 140 as the range of the correction data ⁇ , and the suitable correction data ⁇ may be selected within this range.
- 0.015 MPa between 0.01 MPa and 0.03 MPa may be set as the correction data ⁇ and stored in the data storage unit 140.
- the calculation unit 130 calculates the difference value between the pressure data P3 read from the data storage unit 140 and the correction data ⁇ based on the above formula (3), and divides the difference value by the seawater density data to determine the draft of the ship 200. Identify.
- the identified draft data is stored in the data storage unit 140.
- the draft meter 100 Since the draft constantly changes during loading and unloading of cargo when the ship 200 is stopped or during navigation, the draft meter 100 specifies the draft at any time, and the specified draft data is stored in the data storage unit 140 each time. ..
- the draft meter 100 it is possible to easily identify the draft that can be constantly changed without any trouble, and further, it is possible to accumulate time-series data regarding the draft used for the IoT of the ship 200. become.
- Pw can be in the range of 0.03 MPa to 0.15 MPa.
- P3- ⁇ for example, ⁇ is 0.015 MPa
- Pw is approximately specified within the range of about 0.03 MPa to 0.15 MPa.
- FIG. 8 is a diagram showing an example of the overall configuration of the draft data collection system together with an example of the functional configuration of the server device. Although illustration of the hardware configuration of the server device is omitted, in principle, the same configuration as the hardware configuration of the draft meter 100 shown in FIG. 5 can be applied.
- the draft data collection system 500 collects draft data specified by a plurality of ships 200 via the network 300 and analyzes the data in the server device 400 (so-called cloud sensing). System).
- Each ship 200 (the draft meter 100 of the ship) and the server device 400 are connected to each other via a network 300 typified by the Internet or a LAN (Local Area Network).
- a network 300 typified by the Internet or a LAN (Local Area Network).
- the server device 400 has a data collection unit 402, and the draft data transmitted via the communication unit 112 (see FIG. 5) of the draft meter 100 of each ship 200 is collected by the data collection unit 402, and the data storage unit 406. Stored in.
- the data analysis unit 404 performs various analyzes using the draft data of various ships 200 stored in the data storage unit 406.
- the data analysis unit 404 makes it possible to specify the relationship between draft and fuel consumption.
- the fuel consumption data of the ship is also transmitted to the server device 400, and the data analysis unit 404 can identify the correlation between the draft and the fuel efficiency and determine the draft with excellent fuel efficiency.
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Abstract
Description
プロペラ軸の軸方向に間隔を置いて複数のシールリングが該プロペラ軸の周囲に配設され、複数の該シールリングによって船尾側から順に空気室と油室とが設けられ、空気制御ユニットが空気供給路を介して前記空気室に連通しており、該空気室の圧力を計測する圧力計を有している船舶に用いられるドラフトメーターであって、
前記ドラフトメーターは、データ格納部と演算部とを有し、
前記データ格納部には、所定の補正データと海水密度データが格納されるとともに前記圧力計により計測された圧力データが入力されるようになっており、
前記演算部により、前記圧力データと前記補正データの差分値が演算され、該差分値を前記海水密度データで除して前記船舶の喫水を特定することを特徴とする。
はじめに、図1乃至図4を参照して、実施形態に係る船舶について説明する。ここで、図1は、実施形態に係る船舶のシステム構成の一例を示す図であり、図2は、シールリングの構成と、緊迫力及び流路抵抗を説明する説明図である。
次に、図5乃至図7を参照して、実施形態に係るドラフトメーターについて説明する。ここで、図5は、実施形態に係るドラフトメーターのハードウェア構成の一例を示す図であり、図6は、実施形態に係るドラフトメーターの機能構成の一例を示す図である。また、図7は、ドラフトメーターのデータ格納部に格納される補正データの一例を示す図である。
次に、図8を参照して、喫水データ収集システムの一例について説明する。ここで、図8は、喫水データ収集システムの全体構成の一例を、サーバ装置の機能構成の一例とともに示す図である。尚、サーバ装置のハードウェア構成の図示は省略するが、原則的には、図5に示すドラフトメーター100のハードウェア構成と同様の構成が適用できる。
2 :軸受
3 :プロペラ軸
4 :ライナー
5 :プロペラ
6 :分割ハウジング
7 :ハウジング
8 :パッキンリング
9 :シールリング
10 :船尾管シール装置
20A :第1空気室(空気室)
20B :第2空気室(空気室)
20C :第1油室(油室)
20D :第2油室(油室)
20E :第3油室(油室)
30 :空気制御ユニット
34 :フローコントローラ
40 :圧力計
51 :空気供給路
52 :加圧路
54 :油戻り路
55、56 :油供給路
57 :ドレン路
60 :油タンクユニット
61 :油タンク
70 :油ポンプユニット
80 :ドレン回収ユニット
100 :ドラフトメーター
120 :データ収集部
130 :演算部
140 :データ格納部
110 :表示部
112 :通信部
200 :船舶
300 :ネットワーク
400 :サーバ装置
500 :喫水データ収集システム
Claims (9)
- プロペラ軸の軸方向に間隔を置いて複数のシールリングが該プロペラ軸の周囲に配設され、複数の該シールリングによって船尾側から順に空気室と油室とが設けられ、空気制御ユニットが空気供給路を介して前記空気室に連通しており、該空気室の圧力を計測する圧力計を有している船舶に用いられるドラフトメーターであって、
前記ドラフトメーターは、データ格納部と演算部とを有し、
前記データ格納部には、所定の補正データと海水密度データが格納されるとともに前記圧力計により計測された圧力データが入力されるようになっており、
前記演算部により、前記圧力データと前記補正データの差分値が演算され、該差分値を前記海水密度データで除して前記船舶の喫水を特定することを特徴とする、ドラフトメーター。 - 特定された前記喫水が前記データ格納部に対して喫水データとして随時蓄積されることを特徴とする、請求項1に記載のドラフトメーター。
- 前記補正データが、前記シールリングによる緊迫力値と、前記プロペラ軸と該シールリングの間の流路抵抗値の加算値であることを特徴とする、請求項1又は2に記載のドラフトメーター。
- 前記ドラフトメーターは表示部をさらに有し、
演算された前記船舶の前記喫水を前記表示部に表示することを特徴とする、請求項1乃至3のいずれか一項に記載のドラフトメーター。 - 前記ドラフトメーターは通信部をさらに有し、
前記データ格納部に格納されている前記喫水データが、前記通信部を介して該喫水データを収集するサーバ装置に送信されることを特徴とする、請求項2、請求項2に従属する請求項3又は4のいずれか一項に記載のドラフトメーター。 - プロペラ軸の軸方向に間隔を置いて複数のシールリングが該プロペラ軸の周囲に配設され、複数の該シールリングによって船尾側から順に空気室と油室とが設けられ、
空気制御ユニットが空気供給路を介して前記空気室に連通しており、該空気室の圧力を計測する圧力計を有している船舶において、
前記船舶はドラフトメーターをさらに有し、
前記ドラフトメーターはデータ格納部と演算部とを有し、
前記データ格納部には、所定の補正データと海水密度データが格納されるとともに前記圧力計により計測された圧力データが入力されるようになっており、
前記演算部により、前記圧力データと前記補正データの差分値が演算され、該差分値を前記海水密度データで除して前記船舶の喫水が演算されることを特徴とする、船舶。 - 特定された前記喫水が前記データ格納部に対して喫水データとして随時蓄積されることを特徴とする、請求項6に記載の船舶。
- 前記補正データが、前記シールリングによる緊迫力値と、前記プロペラ軸と該シールリングの間の流路抵抗値の加算値であることを特徴とする、請求項6又は7に記載の船舶。
- 前記船舶は、油タンクを有して前記油室に連通する油タンクユニットをさらに有しており、
前記空気制御ユニットは、一定流量の圧縮空気を前記空気室に供給し、海水圧の変動に対して前記圧縮空気の流量を調整して前記空気室の圧力を制御するとともに、前記油タンクを加圧して前記空気室の圧力に対して一定差圧だけ前記油室の油圧を高く維持する制御を実行している、請求項6乃至8のいずれか一項に記載の船舶。
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PCT/JP2018/042772 WO2020105105A1 (ja) | 2018-11-20 | 2018-11-20 | ドラフトメーター及び船舶 |
EP18941091.3A EP3854674B1 (en) | 2018-11-20 | 2018-11-20 | Draught meter and vessel |
CN201880098889.8A CN112888627B (zh) | 2018-11-20 | 2018-11-20 | 吃水测量仪和船舶 |
JP2018561281A JP6483938B1 (ja) | 2018-11-20 | 2018-11-20 | ドラフトメーター及び船舶 |
KR1020217008764A KR102321817B1 (ko) | 2018-11-20 | 2018-11-20 | 드래프트 미터 및 선박 |
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EP3854674A4 (en) | 2021-11-03 |
CN112888627B (zh) | 2022-02-11 |
CN112888627A (zh) | 2021-06-01 |
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EP3854674B1 (en) | 2022-05-18 |
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