JP3552050B2 - Ship propulsion device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a boat propulsion device and a boat provided with this propulsion device. More specifically, the present invention relates to a marine propulsion device that generates thrust by operating while projecting downward from a hull and advances the hull, and a marine vessel to which the propulsion device is applied.
[0002]
2. Description of the Related Art
BACKGROUND ART Conventionally, there is a ship equipped with a propulsion device having a propeller at a lower end of a container projecting downward from the bottom of the ship. In addition, an elevating propulsion device that raises and lowers the container in a storage room formed in the hull so that the propulsion device projects downward from the bottom of the ship when necessary and drives the propulsion device is often used. Further, there is known a ship provided with a turning type propulsion device capable of turning the entire propulsion unit 360 ° in a horizontal plane.
[0003]
A vessel disclosed in Japanese Patent No. 3130519 is known as such a vessel. As disclosed in this publication, an electric motor for rotating a propulsion device and a number of accessories for operating the electric motor are accommodated in the container. In the case of an elevating propulsion device, a hydraulic cylinder for elevating is accommodated, and in the case of a revolving propulsion device, a hydraulic motor or gear for turning is further accommodated. For this reason, the inside of the container is partitioned into three or four floors, and the equipment is arranged. In addition, it is necessary for ship crew members to come and go regularly for maintenance of these equipment, and safety equipment such as fire fighting equipment and ventilation equipment is required. Therefore, the size of the container is increased, and manufacturing and machining of the can are troublesome, and loading and unloading the electric motor and auxiliary equipment into and out of the container is also a difficult task.
[0004]
The present invention has been made in order to solve such problems, and is easy to manufacture and assemble, and furthermore, a marine propulsion device that makes the function of a container sounder, and to which the propulsion device is applied. It aims to provide ships.
[0005]
[Means for Solving the Problems]
The marine propulsion device of the present invention,
A container mounted on the hull for accommodating a propulsion drive,
The propulsion device attached to the lower end of the container,
The container is configured to be dividable into an upper body and a lower body, and at least one groove for at least two seal members forms a closed loop on at least one of the mutual contact surfaces of the upper body and the lower body. It is provided with a seal member of a loop-shaped outer shape that can be fitted in each groove,
A pressurizing pipe communicating from inside the container is provided between the grooves on at least one contact surface .
[0006]
According to such a propulsion device, since a generally large container is of a vertically divided type, its manufacture is facilitated, and the work of incorporating devices such as a driving machine and a turning mechanism into the container is also facilitated. Furthermore, since two seal members are mounted, the seals are multiplexed and the sealing function is improved. In addition, by increasing the pressure in the area defined by the two seal members and the two contact surfaces, water can enter from outside the container due to damage to the outer seal members and grooves. Can be prevented. Before use, the soundness of the sealing member and its groove, that is, the soundness of the sealing function, can be checked by checking whether the supply air pressure has been reduced.
[0007]
The propulsion device is configured to be able to be driven to rotate substantially in a horizontal plane with respect to the container,
A marine propulsion device is preferred in which the lower body of the container is configured as a gear case for accommodating the turning gear mechanism of the propulsion device.
[0008]
This is because a gear case that generally requires high accuracy and a container body (upper body of the container) that mainly accommodates equipment and do not require high processing accuracy and assembly accuracy can be manufactured separately. In general, the height of the gear case is much smaller than that of the container body, so that the divided portion of the container is located near the lower end of the container. Therefore, the moment at the divided portion generated due to the thrust by the propulsion device is reduced, and the influence on the sealing function of the divided portion is significantly reduced, which is preferable.
[0013]
In addition, a marine propulsion device in which a compressed air supply device capable of adjusting the supply pressure is connected to the pressurizing pipe is preferable.
[0014]
This is because the supply pressure can be adjusted according to the draft position of the hull.
[0015]
Alternatively, a cylinder with a built-in piston is connected to the pressurized pipe,
A communication pipe communicating with the outside of the container is connected to the pressurizing chamber on one side of the piston in the cylinder,
The above pressure pipe is connected to the pressure receiving chamber on the other side,
A marine propulsion device including a biasing means for biasing a piston toward a pressure receiving chamber in the pressurizing chamber is also preferable.
[0016]
This is because a constant differential pressure can always be applied to the inside of the outer seal member against the container external water head at the division site by the external water pressure applied to the pressurizing chamber and the constant pressure by the urging means. . As a result, even if the draft position fluctuates, it is possible to easily prevent the water from entering the division site due to the external water pressure of the container.
[0017]
Further, a marine propulsion device provided with a displacement detecting means for detecting the displacement of the piston is preferable.
[0018]
This is because, in addition to preventing the entry of water, the entry of the water itself can be detected. As a result, quick repair is possible.
[0019]
The displacement detection means includes a detected member attached to the piston and penetrating the end wall of the cylinder, and a detector that emits a signal when detecting a displacement of the detected member. Is preferred.
[0020]
This is because the ingress of water can be detected remotely.
[0021]
Further, in the propulsion device including the two or more seal members, between the grooves on at least one contact surface, a detection pipe communicating from the inside of the container is disposed,
A marine propulsion device in which a water leakage detection device is connected to this detection pipe is preferable.
[0022]
This is because water entering from the outside of the container through the outer seal member can be detected, and quick repair can be performed.
[0023]
In addition, it is preferable that the water leakage detection device includes a vessel connected to a detection pipe and a float switch attached to the vessel.
[0024]
This is because entry of water can be detected with a simple configuration. The float switch is a switch that is operated by being pushed when the water surface rises.
[0025]
The marine vessel of the present invention includes any one of the marine vessel propulsion devices described above.
[0026]
According to such a ship, the above-described effects can be obtained.
[0027]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a ship and a propulsion device thereof according to an embodiment of the present invention will be described with reference to the accompanying drawings.
[0028]
FIG. 1 is a partial cross-sectional rear view showing a state in which a boat propulsion device (hereinafter, simply referred to as a propulsion device) according to an embodiment of the present invention is lowered in a storage compartment of a hull. FIG. 2 is a sectional side view of the same part. FIG. 3 is a sectional view taken along line III-III of FIG.
[0029]
The ship shown in FIGS. 1 and 2 includes a lifting and lowering type propulsion device 1. In the drawing, the propulsion device 1 is housed in a storage room 101 provided in the hull 100 so as to be able to move up and down, and a state where the propulsion device 1 is lowered is shown by a solid line, and a state where it is raised is shown by a two-dot chain line. The propulsion device 1 includes a cylindrical container 2 that moves up and down in a storage room 101, and a propulsion device 3 attached to a lower end of the container 2. The propulsion device 3 has a propeller 4. In the raised state, the lower end of the propulsion device 3 is stored above the bottom B as shown by the two-dot chain line. In the lowered state, only the propulsion device projects downward from the bottom B as shown by the solid line.
[0030]
Two hydraulic cylinders 5 for ascending and descending drive are incorporated in the container 2, and a rod 5 a of the hydraulic cylinder 5 is suspended by a suspension beam 6 provided on the hull 100 above the storage room 101. The weight of the container 2 and the propulsion device 3 is supported by the suspension beam 6 via the rod 5a. The container 2 is raised or lowered by expanding and contracting the hydraulic cylinder 5. The hydraulic cylinders 5 may be provided in a preferable number according to the weight of the container 2.
[0031]
An electric motor 7 for driving the propulsion device 3 is incorporated in the container 2. The propulsion device 3 is turned 360 ° in a horizontal plane through a gear mechanism 10 by a plurality of turning drive hydraulic motors 9. The gear mechanism 10 has a pinion gear 10a fixed to an output shaft of the hydraulic motor 9 and a spur gear 10b fixed to a support shaft 11 hanging down the propulsion unit 3. A transmission shaft 12 from the propulsion motor 7 penetrates the inside of the support shaft 11 and is communicatively connected to a propeller shaft (not shown). Although not shown, the container 2 is provided with fire extinguishing equipment and ventilation equipment. As shown in FIG. 3, the container 2 has a rectangular cylindrical shape, but is not limited to the rectangular cylindrical shape, and may be another polygonal cylindrical shape, a cylindrical shape, an elliptical cylindrical shape, or the like.
[0032]
The container 2 can be divided into two vertically. That is, the container 2 includes the container main body 2a and the gear case 13 detachably attached to the lower end of the container main body 2a, which means that the two members 2a and 13 can be separated from each other. The gear case 13 houses the gear mechanism 10 therein, and is filled with lubricating oil, so that the gear case 13 is held in a sealed state.
[0033]
If the gear case 13 is removed from the container main body 2a, the container main body 2a will be in a state without a bottom. As shown in FIG. 4, the propulsion unit 3, the gear mechanism 10, the gear case 13, the electric motors 7 and the hydraulic motors 9 may be assembled as a propulsion unit 14. As described above, since the gear case 13 can be made independent and can be detachably attached to the container body 2a, the manufacture becomes easy and the disassembly and assembly of the propulsion device 1 becomes very convenient.
[0034]
Further, it is preferable that the moment generated at the portion of the divided surface by the thrust generated by the propulsion device during the navigation of the ship be small. This is because the influence of the divided surface on the sealing function is reduced. As a result, the number of fasteners such as bolts is small and small. Since the height of the gear case 13 is usually considerably smaller than the height of the container body 2a, the above-mentioned division surface exists at the lower part of the container 2. That is, it exists at a position near the propulsion device 3 and a position near the lower end of the container. As a result, the moment generated at the portion of the division surface becomes small. In the present embodiment, the size of the container body 2a is about 5000 mm in length, about 5300 mm in width, about 10000 mm in length (height), and the height of the gear case is about 1000 mm. These dimensions are examples.
[0035]
There are other advantages of making the gear case 13 and the container body 2a separate. The gear case accommodates equipment such as the gear mechanism 10 and bearings that require high processing accuracy as well as high assembly accuracy. Therefore, the gear case is subjected to internal distortion removal by an annealing process after the can making process and the welding work, and finally finish machining is performed. In this case, if only the gear case is made independent, the above annealing treatment and machining can be facilitated. On the other hand, the container main body 2a cannot be actually machined after annealing or due to its dimensions. For this reason, the part which needs a machined surface is machined before welding, and is manufactured by can making and welding.
[0036]
As shown in FIGS. 1, 2, and 5, both the container main body 2a and the gear case 13 have flanges 15 and 16 at mutually contacting parts, and are fastened to each other by a push bolt 17. Of course, not limited to the push bolt, a stud bolt and nut, a through bolt and nut, a headed bolt and nut, and the like may be used.
[0037]
As apparent from FIGS. 3 and 5, two seals for mounting two loop-shaped seal rings 18 are provided outside the bolt holes on the contact surface of the flange 16 of the gear case 13. A ring groove (hereinafter simply referred to as a groove) 19 is formed. The two grooves 19 are formed parallel to each other along the periphery of the flange. By using two seal rings 18, the waterproof function is improved. The formation portion of the groove 19 is not limited to the flange 16 of the gear case 13. It may be formed on the flange 15 of the container body 2a, or may be formed on both the flanges 15, 16 depending on the type of the seal ring. Further, the number of the seal ring 18 and the groove 19 is not limited to two, and may be three or more.
[0038]
As shown in FIG. 5, a through hole 20 is formed in the flange 15 of the container body 2 a at a position corresponding to a position between the two grooves 19 of the other flange 16, and a pipe 21 is connected to the through hole 20. Have been. Therefore, when the container 2 is assembled, the pipe 21 communicates a portion defined by the surfaces of the flanges 15 and 16 and the seal rings 18 (hereinafter, referred to as a buffer A) with the inside of the container 2. Become. This pipe 21 is useful. When the propulsion device 1 is used, the position of the contact surface between the two flanges 15 and 16 (the division surface of the container 2) may be at a depth of about 10 m, so that an external pressure of about 1 atm is applied to the outer seal ring 18a. . If the seal ring 18a or the groove is damaged, water outside the container may enter. For this reason, in order to prevent water from entering the container, a seal ring 18b is arranged inside and a two-stage seal structure is provided. In order to inspect whether these two seal rings and each groove are sound, an inspection air is pressurized and sealed from the pipe 21, and an airtight test is performed to determine whether there is any leakage. This confirms the sealing function. After the inspection, remove the piping, and then screw in the plug and attach it to seal it with water. In this way, water can be prevented from entering by the two seal rings 18a and 18b. When the pipe 21 is permanently installed as shown in FIG. 5, water leakage can be detected through the pipe 21, and the water leak can be collected in a tank (not shown) or the like and drained in a timely manner. Further, by injecting pressurized air or the like into the buffer section A through the pipe 21, water leakage from the outside of the container can be prevented.
[0039]
A configuration having such an operation will be described in detail below.
[0040]
FIG. 6 shows an example in which the pipe 21 is used as a pressure pipe. In the figure, a portion shown as a water surface S indicates a draft position. The other end of the pipe 21 is connected to a cylinder 23 containing a piston 22. A chamber (hereinafter, referred to as a pressurized chamber) 23a above the piston 22 in the cylinder 23 is provided with a biasing means for biasing the piston 22 toward a lower chamber (hereinafter, referred to as a pressure receiving chamber) 23b. ing. A coil spring 24 is used as the urging means. The pipe 21 is connected to a pressure receiving chamber 23b. A communication hole 25 communicating with the outside of the container 2 is drilled, and a communication pipe 26 that connects the pressurizing chamber 23a and the communication hole 25, that is, communicates with the outside of the container 2, is connected thereto. Therefore, when the vessel is used, water outside the container enters the pressurizing chamber 23a through the communication pipe 26. The pressure receiving chamber 23b is filled with air. The sum of the pressure by the urging force of the coil spring 24 and the head at the position of the communication hole 25 is set to be larger than the head at the position of the division surface. This can be adjusted by the position of the communication hole 25 and / or the initial deflection of the coil spring 24. Therefore, even if the draft position changes, the pressure of the buffer section A always becomes higher by a certain value than the water head at the position of the dividing surface in accordance with the fluctuation.
[0041]
According to this configuration, an air pressure higher than the external water pressure at the position of the dividing surface is always applied to the buffer section A. Therefore, even if water outside the container attempts to enter due to damage to the outer seal ring 18a or the groove 19, the entry can be prevented because the pressure in the buffer section A is higher than the external water pressure.
[0042]
As shown in the figure, a detection rod 27 is protruded from the piston 22 so that the detection rod 27 penetrates the top (or bottom) of the cylinder 23 in an airtight state or a watertight state. It is preferable to provide a known detector such as a limit switch 28 for detecting the displacement of the detection rod 27 as the detected member. By doing so, it is possible to prevent water leakage as described above and to remotely detect damage to the seal ring 18 and the groove 19.
[0043]
FIG. 7 shows a structure in which a compressed air supply device 29 is connected to the pipe 21. As the compressed air supply device 29, an air production device that is permanently installed in the container for another purpose may be used. If the pressure adjusting device 30 is attached to the pipe 21 and the pressure adjusting device 30 is set to an air pressure corresponding to the assumed maximum draft and a high air pressure enough to cover the variation of the draft, FIG. Similarly to the mechanism of No. 6, entry of external water into the buffer A is prevented. Moreover, before using the propulsion device 1, by applying a constant pressure to the buffer portion A using this configuration, the soundness of the seal ring 18 and the groove 19 is inspected in advance based on whether or not the pressure has decreased. be able to. At this time, by applying a load in the horizontal direction to the propulsion device 3, it becomes easy to perform the preliminary inspection in a state where a moment corresponding to the thrust at the time of using the propulsion device 1 is applied.
[0044]
FIG. 8 shows a pipe in which a water leak detection tank 31 is connected to the pipe 21. Water is stored in the water leak detection tank 31, and a so-called float switch 32 is attached. If external water enters the buffer section A due to damage to the seal ring 18 or the groove 19, the operation can be detected by the operation of the float switch 32. It is not necessary to store the water in the tank 31 in advance, but it is preferable to store the water for early detection.
[0045]
In addition, if a water drainage mechanism (not shown) is provided in the water leakage detection tank 31, it is possible to continuously drain water when water enters from outside the container.
[0046]
The pipe 21 described above is not limited to one location on the entire periphery of the dividing surface, and may be provided at two or more locations as needed. If necessary, all of the cylinder 23 of FIG. 6, the compressed air supply device 29 of FIG. 7, and the water leakage detection tank 31 of FIG. 8 may be provided for one container. May be provided. Although not shown, it is possible to detect water leakage even if a pressure gauge is attached to the pipe.
[0047]
In FIGS. 1 and 2, reference numeral 33 denotes a tapered fixing pin for fixing the container 2, which is provided on the outer periphery of the upper part of the container 2 by a hydraulic jack 34 so as to be able to advance and retreat. The fixing pins 33 are respectively provided on four sides of the container 2 having a rectangular cross section. On the other hand, on the surface of the storage chamber 101 facing the fixing pin 33, tapered fixing holes 35 that match the tapered shape of the fixing pin 33 are provided at two upper and lower locations on four surfaces, respectively. The fixing holes 35 allow the propulsion device 3 to protrude from the ship bottom B by lowering the container 2 by fitting the fixing pins 33 in a state where the container 2 is raised and the propulsion device 3 is stored in the storage room 101. It is provided at a position where the fixing pin 33 is fitted in a state where the fixing pin 33 is fitted.
[0048]
A cylindrical pressing pin 36 for fixing the container is provided on the outer periphery of the lower portion of the container 2. The pressing pins 36 are also provided on four sides of the container 2 having a rectangular cross section, and are protruded and retracted by the hydraulic jack 37. On the other hand, a receiving seat 38 that is pressed by the pressing pins 36 and supports the lower part of the container 2 is provided on the surface of the storage chamber 101 facing the pressing pins 36. Similarly to the fixing holes 35, the receiving seats 38 are provided at two upper and lower positions on four sides of the storage room 101, respectively. When the container 2 is raised and the propulsion device 3 is stored in the storage room 101, the pressing pins 36 are provided. And a position where the container 2 is lowered and the propulsion device 3 is pressed by the pressing pin 36 in a state of protruding from the ship bottom B.
[0049]
In the above embodiment, the upper and lower divisions of the container have been described with respect to the example of mutual attachment and detachment of the container body 2a and the gear case 13, but the present invention is not limited to this configuration. It may be divided at another part, and the present invention is not limited to the division into two parts, and may be configured to be able to be divided into two or more parts.
[0050]
In the above embodiment, the turning type and the lifting type propulsion device have been described as an example, but the present invention is not limited to such a configuration. It may be a non-elevating and revolving type, a non-revolving type and elevating type, or a fixed type propulsion device that does not revolve or elevate.
[0051]
The embodiment described above is an embodiment of the present invention, and various changes can be made without departing from the spirit of the present invention, and the present invention is not limited to the above-described embodiment.
[0052]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, manufacture and assembly of a propulsion device are easy, and also the function of a container can be made sound.
[Brief description of the drawings]
FIG. 1 is a partially sectional rear view showing a state in which a marine propulsion device according to an embodiment of the present invention is lowered in a storage compartment of a hull.
FIG. 2 is a partial cross-sectional side view of the marine propulsion device of FIG.
FIG. 3 is a sectional view taken along line III-III of FIG. 2;
FIG. 4 is a partial cross-sectional rear view showing the state before the propulsion device of FIG. 1 is assembled.
FIG. 5 is a cross-sectional view showing an example of a container divided into two parts in the propulsion device of the present invention.
FIG. 6 is a cross-sectional view showing another example of the container divided into two parts in the propulsion device of the present invention.
FIG. 7 is a cross-sectional view showing yet another example of the container divided into two parts in the propulsion device of the present invention.
FIG. 8 is a cross-sectional view showing still another example of the container divided into two parts in the propulsion device of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Propulsion device 2 ... Container 2a ... Container body 3 ... Propulsion machine 4 ... Propeller 5 ... Hydraulic cylinder 5a ... Rod (of hydraulic cylinder) 6 ... Hanging beam 7 ... ..Electric motor 9 hydraulic motor 10 gear mechanism 10a pinion gear 10b spur gear 11 support shaft 12 transmission shaft 13 gear case 14 propulsion unit 15, 16 flange 17 push bolt 18 seal ring 19 groove 20 (for seal ring) through hole 21 piping 22 piston 23 cylinder 23a, pressurizing chamber 23b, pressure receiving chamber 24, coil spring 25, communication hole 26, communication tube 27, detection rod 28, limit switch 29, compressed air supply device 30 ... Pressure adjusting device 31 Discharge tank 32 ... Float switch 33 ... Fixing pin 34 ... Hydraulic jack 35 ... Fixing hole 36 ... Pressing pin 37 ... Hydraulic jack 38 ... Seat 100 ... Hull 101 ... Storage room A ... Buffer B ... Ship bottom S ... Draft

Claims (9)

A container mounted on the hull for accommodating a propulsion drive,
The propulsion device attached to the lower end of the container,
The container is configured to be dividable into an upper body and a lower body, and at least one of the contact surfaces of the upper body and the lower body has at least two grooves for sealing members to form a closed loop. It is provided with a seal member of a loop-shaped outer shape that can be fitted in each groove,
A marine propulsion device in which a pressurizing pipe communicating from inside the container is disposed between grooves on at least one contact surface . The propulsion device is configured to be capable of turning drive substantially in a horizontal plane with respect to the container,
The marine propulsion device according to claim 1, wherein the lower body of the container is configured as a gear case for housing a turning gear mechanism of the propulsion device. The pressing in pressure pipe, marine propulsion device according to claim 1, wherein the compressed air supply device with adjustable supply pressure is connected. A cylinder with a built-in piston is connected to the pressurized pipe,
A communication pipe communicating with the outside of the container is connected to the pressurizing chamber on one side of the piston in the cylinder,
The above pressure pipe is connected to the pressure receiving chamber on the other side,
The pressing marine propulsion device of the biasing means is formed by interior claim 1, wherein the pressure chamber to urge the piston to the pressure receiving chamber. 5. The marine propulsion device according to claim 4, further comprising a displacement detecting means for detecting a displacement of the piston. 6. The ship according to claim 5 , wherein the displacement detecting means includes a detected member attached to the piston and penetrating an end wall of the cylinder, and a detector for emitting a signal when detecting a displacement of the detected member. Propulsion device. A detection pipe communicating from inside the container is provided between the grooves on at least one contact surface,
Marine propulsion device according to claim 1, wherein the leak detection device to detection pipe is connected. The marine propulsion device according to claim 7 , wherein the water leakage detection device includes a container connected to the detection pipe, and a float switch attached to the container. A marine vessel comprising the marine propulsion device according to any one of claims 1 to 8 .

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