JPS6135026B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for measuring ship propulsion force.

With the development and spread of high-performance internal combustion engines in recent years,
Small and medium-sized vessels such as fishing boats, cargo ships, and passenger ships are being equipped with high-performance internal combustion engines to compete for higher horsepower and higher speeds. However, high-performance internal combustion engines require more advanced maintenance than conventional ones, and due to lack of maintenance by workers who are accustomed to conventional easy maintenance, it is difficult to maintain high-performance ships. Unable to maintain sufficient performance and not able to demonstrate its full potential. In order to compensate for this decline in ship performance, the current situation is to increase the supply of fuel to drive high-performance internal combustion engines to operate ships. This not only wastes petroleum fuel, which is a resource and is rising in price every year, but also causes a rise in prices due to rising costs. However, while conventional periodic ship inspections target serious engine malfunctions, they do not target degradation in propulsion performance due to increased fuel consumption or an imbalance between the engine's horsepower requirements and the propulsion device. Furthermore, since there is no simple method for measuring the propulsion force of ships, increases in fuel consumption rates and decreases in propulsion force have been left unaddressed.

The present invention has been developed in view of the above-mentioned points, and it is possible to easily and quickly measure the propulsion force of a vessel accurately without causing the stern or bow to rise or fall abnormally in response to the ebb and flow of the tide or the size of the small vessel. , it is possible to specifically diagnose increases in fuel consumption and decreases in propulsion force, which had previously been ignored, and to balance the horsepower required by high-performance internal combustion engines with the propulsion equipment to ensure that ships can achieve sufficient performance. It is an object of the present invention to provide a method for measuring the propulsion force of a small boat that can be improved, prevent an increase in fuel consumption rate, and save energy.

Hereinafter, the present invention will be explained based on examples.

FIG. 1 shows an embodiment of the present invention, in which a ship is moored at a quay in a harbor or the like to measure propulsion force. The propulsive force measuring device 1 is configured to be able to measure a predetermined propulsive force using a mechanical type such as a spring scale, a hydraulic type, an electric type such as a strain gauge or a load cell, etc., and hooks 2 and 3 provided on both sides. Connectors 4 and 5 such as chains, wires, and synthetic resin ropes having a predetermined strength are detachably connected to the connectors. One short connector 4
The other end is removably locked to a fixed part 7 such as a mooring bit protruding from the quay 6 as shown in the figure, and the other end of the other long connector 5 is branched. , a small vessel capable of towing measurements such as a fishing boat, cargo ship, passenger boat, or motor boat whose propulsion force is to be measured as shown in the figure 8
The connectors 4 and 5 are releasably engaged with hooks 9 on both sides of the stern of the boat, and when the propulsion device 10 is driven, the couplings 4 and 5 are pulled in the direction of propulsion of the boat 8. The propulsive force of 8 can be measured by the above propulsive force measuring device 1. As shown in the figure, the quay 6 on land is equipped with a lifting device 13 that can be raised and lowered by a screw drive, which includes a fixed pulley 11 and a movable pulley 12. When connected to a vessel 8, the coupling device 5 can be stretched parallel to the propulsion direction and adjusted in response to tides and differences in height between the waterline of the vessel 8 and the locking portion 9 at the stern. It is said that

Therefore, in order to measure the propulsive force of the ship 8, the ship 8 whose propulsive force is to be measured is moved by connecting the connectors 4 and 5 equipped with the propulsive force measuring device 1 as described above via the lifting device 13. The pulley 12 is raised and lowered as appropriate to connect the connectors 4 and 5 to the fixed part 7 so that they are stretched parallel to the direction of propulsion of the ship 8. When the high-performance internal combustion engine (not shown) of the ship 8 is driven at a predetermined rotation speed to drive the propulsion device 10, the couplings 4 and 5 are pulled in the propulsion direction, and the applied load is propelled. Measure with force measuring device 1. If the connectors 4 and 5 are stretched parallel to the propulsion direction of the vessel 8 as shown in the figure, the load to be measured becomes the propulsion force of the vessel as it is, and can be directly and accurately detected. In this way,
The propulsive force of the ship 8 corresponding to a desired rotational speed of the internal combustion engine is sequentially measured by the propulsive force measuring device 1, thereby making it possible to measure the desired propulsive force performance of the ship. Therefore, the propulsion force of a ship can be easily and quickly measured through periodic inspections and self-inspections, and its performance can be diagnosed. Appropriate improvements can be made to ships with degraded performance, and the required horsepower of the engine and the propulsion system can be determined. Balance is what allows a car to perform to its full potential and prevents wasteful consumption of fuel. In the above embodiment, the elevating device can also be configured so that the movable pulley can be moved up and down above the fixed pulley, and can be applied as appropriate depending on the positional relationship between the locking part of the ship and the mooring bit. It is something.

In this embodiment, the coupling device can be stretched parallel to the propulsion direction of the vessel to be measured, even with respect to tides and various types of vessels, and the stern of the vessel can be stretched by the tension of the coupling device. It is possible to measure the propulsion force under the same conditions as the ship's operating conditions without floating or sinking.

In the above, the means for tensioning the coupling device in parallel to the propulsion direction is not limited to elevating methods such as pulleys, but also a chain arrangement that can lock the coupling device in a predetermined position or a fixed ladder-like method. It is also possible to use a locking device fixedly installed with a pitch.

FIG. 2 shows still another embodiment of the present invention, in which a ship 8
The propulsive force is measured by measuring the component force of the tension of the connector 14. The propulsion measuring device 1 is a so-called three-point roller type.
It is not directly connected to the connector 14, but is anchored at three points as shown in the figure to the connector 14 that connects the ship 8 to the fixed part 7, and the propulsive force is measured from the component force and angle of the tension applied to the connector 14. It is.

In this example, the propulsive force can be measured by measuring the component of the tension applied to the coupling, so even if the ship has a large propulsive force, a small propulsive force measuring device can be used. It can be measured safely.

In the above embodiments, a mooring bit was used as the fixing part, but a special fixing device for measuring propulsive force may be provided, or a tetrapod or other existing fixing device may also be used.

Furthermore, although a direct reading type propulsive force measuring device has been described, it is obvious that a remote display type can be used. A propulsion measuring device was placed on the quayside to enable successive measurements of small and medium-sized vessels.
It can also be measured on the ship side. In particular, for small vessels equipped with mooring line tension detectors, the mooring lines on both sides of the stern are stretched so that the propulsive force can be measured as described above, and a predetermined load is detected by each mooring line detector. , the propulsive force can be measured by adding together the respective detected tensions.

Furthermore, although the above description describes the measurement of the propulsive force of the ship moving forward, it is obvious that the measurement of the propulsion force of the ship moving backward can also be measured in the same manner.

As described above, in the present invention, it is possible to fix a small stern or a boat's mooring bit on land such as a quay without the stern or boat's stern rising or falling abnormally in response to the ebb and flow of the tide or the size of the small boat. It is possible to easily and quickly measure a small vessel while it is floating on the sea, etc. by connecting it to the vessel via a connecting device such as a rope. It is possible to improve the ship so that the required horsepower of the internal combustion engine and the propulsion device are balanced and exhibit sufficient performance, and it is also possible to prevent an increase in fuel consumption rate and save energy from precious fuel. be.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of one embodiment of the present invention, and FIG.
The figure is a partially omitted schematic side view of the propulsive force measuring section of another embodiment same as the above. 1... Propulsion measuring device, 4, 5, 14... Connector, 6... Quay, 7... Fixed part, 8... Small boat, 9... Locking part.

Claims (1)

[Claims] 1. Propulsion of a small boat is carried out by connecting a small boat to a fixed part on land such as a mooring bit with a connecting device such as a rope so that the propulsion force can be measured while facing the propulsion direction, and by connecting a propulsion force measuring device to the coupling device. A connecting device such as a rope is stretched through a lifting device that can be adjusted up and down to make it parallel to the direction, and the propulsion force of the ship is measured by a propulsive force measuring device via the tension of the connecting device. A method for measuring the propulsion force of small ships.