JP6245458B2 - Propulsion device - Google Patents

Description

The present invention relates to a propulsion device that is suitably used for ships and the like.
Background art

  Generally, in a ship or the like, a propulsive force for navigation is obtained by a propulsion device including a screw or the like.

  By the way, in a propulsion device using such a screw, it can withstand a large negative pressure due to ship speed and ocean conditions (for example, the presence of solid bubbles such as microbubbles, rust powder, or plankton present in water). Cavitation occurs.

  The occurrence of this cavitation is assumed not only to make the surface of the propeller blade of the screw avatar, but also to cause erosion at the base of the propeller blade, leading to damage.

  Conventionally, for example, a technique disclosed in Patent Document 1 has been proposed in order to eliminate such problems.

  In this technology, a boss cap is attached to the downstream side of the boss that forms the root portion of the propeller blade, and a fin is attached to the boss cap, and the flow of water to the rear of the boss is rectified by the fin, By eliminating vortices in the wake of the fin, the occurrence of the cavitation described above is suppressed.

JP 2010-215187 A

  However, although the above-described conventional technology can be expected to suppress the occurrence of the above-described cavitation, the wake vortex caused by the fins cannot be completely eliminated, and therefore the cavitation cannot be completely eliminated. .

In addition, there is a pressure difference due to the difference in water depth immediately above and below the screw, and the rotating screw can be repeatedly passed through a region where the water depth is shallow and the pressure is low and a region where the water depth is deep and the pressure is high.
Cavitation is likely to occur in the low pressure region, and cavitation disappears in the high pressure region. The load on the screw changes periodically, which causes the screw to vibrate and break. Is also envisaged.

  The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a highly durable propulsion device that eliminates the above-described problems of the screw as much as possible.

  In order to solve the above-described problem, the propulsion device of the present invention is attached to a ship traveling on water, sucks the water, and generates a propulsive force on the ship by a reaction force generated when the sucked water is discharged. The rotary base is provided with a rotary base that is rotationally driven. The rotary base is provided at one end of the rotary axis, the fluid suction port for sucking the water, and the other end of the rotary axis A fluid discharge port that discharges the water and a fluid guide path that guides water sucked into the fluid suction port to the fluid discharge port, and the fluid suction port and the fluid discharge port are The fluid guiding path is positioned on the rotation axis of the rotating base, the fluid guiding path is spaced apart in the rotational radial direction with respect to the rotating axis of the base, and the fluid suction port, the fluid guiding path, During the rotation of the rotating substrate. Wherein the fluid accelerating section for feeding to the fluid guide passage while applying a centrifugal force to the water that is drawn into the fluid suction port is formed.

By setting it as such a structure, in the state which has a propulsion apparatus in water, the inside is filled with water.
When the rotating base is rotated around its axis in this state, water located in the fluid acceleration portion is moved in a direction away from the rotating axis of the rotating base by centrifugal force, and passes through the fluid guide path. While being sent to the fluid discharge port, it is discharged to the outside from this fluid discharge port.

  When such a flow of water is formed, the flow path from the fluid suction port to the fluid discharge port via the fluid acceleration unit and the fluid guide path is a continuous and isolated flow path. Due to the law of conservation of energy, the pressure of the fluid acceleration part is reduced.

  When the pressure of the fluid accelerating portion decreases, external water is drawn into the fluid accelerating portion from the fluid suction port, and in combination with the inertia of the water flow, the water flow described above is continued, and the fluid discharge Water is continuously discharged from the outlet.

  When water is discharged from the fluid discharge port, a reaction in a direction opposite to the water discharge direction acts on the propeller due to the reaction, and this force becomes a propulsive force.

  Increasing the rotational speed of the rotating base also increases the centrifugal force and negative pressure generated in the fluid acceleration section, increases the inertia of the fluid, and increases the flow velocity of the water flow discharged from the fluid discharge port. Since it increases, the propulsive force generated by the propulsion device also increases.

Here, since the water flowing in the rotating base flows along the flow path, the friction with the inner wall of the flow path only acts on the water, and the phenomenon in which the constituent members of the propulsion device shear the water. Does not occur.
Accordingly, there is almost no negative pressure that causes cavitation on the contact surface between the constituent members of the propulsion device and the water.

  As a result, it is possible to suppress an unnecessary load from acting on the constituent members of the propulsion device, and to suppress these damages.

  The end of the fluid guide path on the fluid discharge port side is located on the rotational axis of the rotary base so that the end on the fluid suction port side is positioned outward of the rotary base in the rotational radius direction. And can be formed inclined.

  With such a configuration, the centrifugal force at the end of the fluid guide path on the fluid discharge port side is larger than the centrifugal force at the end of the fluid suction port side, thereby the fluid guide path. Even inside, water flowing through the inside can be accelerated.

The inclination of the fluid guiding path is such that the distance between the end of the fluid guiding path on the fluid suction port side and the rotation axis of the rotating base is L1, and the end of the fluid discharge port and the rotating base are rotated. When the distance from the axis is L2, it is preferable that L2 ≧ 1.1 × L1.
By setting such a ratio, it is possible to effectively generate a pressure difference between the inlet side and the outlet side of the fluid guide path and efficiently increase the flow rate of the discharged water.

Further, a plurality of the fluid guiding paths may be formed around the rotation axis of the rotating base.
With such a configuration, the mass of water flowing through the fluid guiding path can be arranged symmetrically with respect to the rotation axis of the rotating base, thereby suppressing the rotational shake of the rotating base. be able to.

  The other end of the rotating body is formed with a plurality of protrusions that form an annular collecting path that collects water discharged from the plurality of fluid guiding paths and leads the fluid to the fluid discharge port. It is possible to smoothly collect water discharged from the fluid guiding path and to send the water to the fluid discharge port while suppressing disturbance of the flow.

A cross-sectional shape of the fluid guide path in a plane perpendicular to the rotation axis of the rotating base may be a substantially oval shape.
With this configuration, the amount of water in the fluid guide path is increased, the amount of water discharged from the fluid discharge port is increased, and the kinetic energy of water discharged from the fluid discharge port is increased. be able to.
As a result, the obtained driving force can be increased.

  A drive shaft along the rotation axis is integrally provided at one end of the rotary base, and the rotary base can be rotationally driven by the drive shaft.

  And, the input shaft is connected orthogonally to the drive shaft through a bevel gear, and the drive shaft and the input shaft are assembled in a single casing, and the casing is connected to the casing. It is also possible to adopt a configuration in which a propulsion direction adjusting mechanism that rotates around the input shaft to change the direction of the rotation axis of the rotating base is provided.

By setting it as such a structure, the direction of the said rotation base | substrate can be adjusted with the said propulsion direction adjustment mechanism, and a propulsion direction can be adjusted, and, thereby, the advancing direction of a ship can be adjusted.
For example, by turning the direction of the rotating base so as to cross the length direction of the ship, the water discharge direction from the fluid discharge port is directed diagonally rearward of the ship, and the ship is turned left and right. Alternatively, the watercraft can be moved backward by directing the water discharge direction toward the tip.

  Instead, a ring gear is integrally attached to the outer periphery of the rotary base so as to be coaxial with the rotation axis thereof, and the rotary base is rotatably accommodated in the casing, and is rotatably supported by the casing on the ring gear. A pinion gear integrally attached to the drive shaft is engaged, an input shaft rotatably supported by the casing is connected to the drive shaft via a bevel gear, and the casing is attached to the casing. It is also possible to adopt a configuration in which a propulsion direction adjusting mechanism that rotates around the input shaft and changes the direction of the rotation axis of the rotating base is provided continuously.

  Alternatively, an outer cylinder that forms the fluid suction port and the fluid discharge port is slidably mounted on the outer periphery of the rotating base, and the outer cylinder is rotated on the overlapping portion of the outer cylinder and the rotating base. A propulsion direction reversal mechanism that reverses the water suction direction and the water discharge direction by reversing the positional relationship between the fluid suction port, the fluid discharge port, and the fluid guide path by relatively moving in the rotation axis direction of the substrate. It is also possible to have a configuration in which

  By adopting such a configuration, it is possible to perform the turn and reverse of the ship as described above.

  The propulsion device of the present invention includes a rotating base that is rotationally driven and a casing that rotatably stores the rotating base, and fluid suction that is opposed to one end of the rotating base at one end of the casing. A fluid discharge port is provided at the other end of the rotating base so as to face the other end of the rotating base, and the fluid suction is provided at a position spaced apart outward in the rotational radius of the rotating base. A fluid guiding path is formed to communicate the opening and the fluid discharge port, and the end of the fluid discharge path on the fluid discharge port side is more than the rotation radius of the rotating base than the end of the fluid suction port side. It is configured to be a fluid accelerating unit that applies centrifugal force to water in the fluid guiding path by being inclined with respect to the rotation axis of the rotating base so as to be located outward in the direction. Can do. A propulsion device characterized by that.

With such a configuration, centrifugal force acts on the water in the fluid guiding path with the rotation of the rotating base, but the end of the fluid guiding path on the fluid discharge port side is the fluid. Since it is formed so as to be inclined with respect to the rotation axis of the rotary base so as to be located outward of the rotary base in the radial direction of rotation than the end on the suction port side, Water is sent toward the fluid discharge port, and further discharged through the fluid discharge port.
And the driving force is obtained by the reaction force.

Here, only the rotating base body is given rotation, and no rotation is given to the casing.
Therefore, since the propulsion device can be operated in a state where the casing is fixed, the support structure for the rotating base body can be configured using the casing as a support.

  In addition, a plurality of rectifying plates are provided on the inner surface of the casing where the fluid discharge port is formed so as to be substantially along the rotation axis of the rotating base, so that water discharged from the fluid discharge port is provided. The propulsion efficiency can be improved by stabilizing the flow of the engine.

According to the present invention, it is possible to generate a propulsive force by a reaction obtained from the discharged water after sucking and accelerating the water.
Here, the sucked-in water rotates together with its constituent members in the propulsion device until discharged, so that there is almost no negative pressure that causes cavitation between the constituent members and the water. Therefore, efficient propulsive force can be generated, and vibrations of the constituent members can be suppressed to suppress these damages.

It is a front view which shows the 1st Embodiment of this invention. FIG. 1 shows a first embodiment of the present invention and is a side view seen from a fluid discharge port side. FIG. 1 shows a first embodiment of the present invention and is a side view seen from a fluid suction port side. It is a longitudinal cross-sectional view which shows the 1st Embodiment of this invention, (a) has shown the state in which an outer cylinder exists in a forward thrust position, (b) has shown the state in which an outer cylinder exists in a backward thrust position. 1 is a longitudinal sectional view showing a propulsion direction reversing mechanism, showing a first embodiment of the present invention. FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view illustrating an operation of a propulsion direction reversing mechanism according to a first embodiment of the present invention. It is a longitudinal cross-sectional view which shows the 2nd Embodiment of this invention. It is a front view which shows the 3rd Embodiment of this invention. It is a front view for demonstrating the action | operation of the 3rd Embodiment of this invention. It is a front view which shows the 4th Embodiment of this invention. It is a front view for demonstrating the action | operation of the 4th Embodiment of this invention. It is a front view which shows the 5th Embodiment of this invention. It is a front view which shows the 6th Embodiment of this invention. It is a longitudinal cross-sectional view which shows one Embodiment of the modification of this invention. FIG. 9 shows an embodiment of a modification of the present invention and is a view seen from the fluid discharge side. It is the figure which looked at the rotary base | substrate concerning one Embodiment of the modification of this invention from the fluid discharge side. It is the figure which looked at the rotation base concerning one embodiment of the modification of the present invention from the fluid suction side. It is a side view of the rotation base concerning one embodiment of the modification of the present invention. It is the figure which looked at the rectifying plate concerning one Embodiment of the modification of this invention from the fluid discharge side.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

  The propulsion device according to the present embodiment is attached to a ship (not shown) that travels on water, sucks the water, and imparts a propulsive force to the ship by a reaction force generated when the sucked water is discharged. The propulsion device 1 includes a rotary base 2 that is rotationally driven. The rotary base 2 is provided at one end of a rotary axis thereof, and includes a fluid suction port 3 for sucking the water and the other end of the rotary axis. A fluid discharge port 4 that discharges the water and a fluid guide path 5 that guides the water sucked into the fluid suction port 3 to the fluid discharge port 4. The fluid discharge port 4 is positioned on the rotation axis of the rotating base 2, the fluid guiding path 5 is positioned away from the rotating axis of the rotating base 2 in the rotational radial direction, and , Between the fluid suction port 3 and the fluid guiding path 5 The rotation by a fluid accelerating unit A for feeding to the fluid guide passage 5 while applying a centrifugal force to the water that is drawn into the fluid suction opening 3 of the rotary base 2 is formed.

More specifically, the rotary base 2 is formed in a substantially cylindrical shape, and its axis is the above-described rotary axis.
A cylindrical outer cylinder 6 is fitted on the outer periphery of the rotating base 2 so as to be slidable in the rotational axis direction, and both ends of the outer cylinder 6 are narrowed inward. The fluid suction port 3 is formed to be opposed to one end portion of the rotating base 2 by the restricting portion 6a at one end, and the other end portion of the rotating base 2 is opposed to the other end portion of the rotating base 2 by the restricting portion 6b at the other end. A fluid discharge port 4 is formed.

The rotary base 2 is formed with four fluid guiding paths 5 over the entire length so as to surround the rotation axis.
In the present embodiment, these fluid guide paths 5 are formed so as to have a substantially oval cross section in a plane orthogonal to the rotation axis, as shown in FIGS. 2 and 3.

  Further, as shown in FIG. 2 and FIG. 3, four liquid introduction plates 7 are integrally projected on each end face of the rotary base 2 so as to block between the fluid guide paths 5. The fluid acceleration part A is formed by the liquid introduction plate 7, one end face of the rotating base 2, and the throttle part 6 a of the outer cylinder 6.

  Further, a conical rectifying protrusion 8 is integrally provided on the inner side of each fluid guide plate 7 on the other end surface of the rotating base 2, and the rectifying protrusion 8 is formed on the inner wall of the outer cylinder 6. And a fluid collecting portion B for guiding the water discharged from the fluid guide passages 5 to the fluid discharge port 4 after collecting the water discharged from the fluid guiding passages 5 between the throttle 6b at the other end of the outer cylinder 6. Forming.

  Further, as shown in FIGS. 4 (a), (b) and FIG. 5, annular protrusions 9 are integrally provided on the outer periphery of the rotating base 2 in the vicinity of both ends in the length direction. The inner peripheral surface of the outer cylinder 6 is brought into sliding contact with the outer peripheral surface of the annular protrusion 9 in a liquid-tight manner.

  Further, an annular protrusion 10 is integrally provided on the inner peripheral surface of the outer cylinder 6 at a substantially intermediate portion in the length direction, and the inner peripheral surface of the annular protrusion 10 is a pair of the rotating base 2. Between the annular protrusions 9, the outer peripheral surface of the rotating base 2 is brought into sliding contact with the liquid.

  A pair of hydraulic chambers 11 and 12 are formed by the pair of annular protrusions 9 of the rotating base 2 and the annular protrusion 10 of the outer cylinder 6.

  On the other hand, a drive shaft 13 penetrating the fluid suction port 3 is fitted to the rotation center portion of the rotary base 2.

  Inside the drive shaft 13, two hydraulic oil supply paths 14, 15 are bored along the length direction, and one end of each of the hydraulic oil supply paths 14, 15 is formed on the rotating base body. 2, each of the hydraulic chambers 11 and 12 is communicated with each other, and the other end thereof is connected to the hydraulic oil supply device Z via a rotary joint 16.

  The hydraulic oil supply device Z stores an oil pan 17 that stores hydraulic oil, an oil pump 18 that sucks and pressurizes the hydraulic oil from the oil pan 17, and hydraulic oil that is pressurized by the oil pump 18. The accumulator 19 is interposed between the accumulator 19 and each of the hydraulic oil supply passages 14 and 15, and either one of the hydraulic chambers 11 and 12 is interposed via the hydraulic oil supply passages 14 and 15. And a control valve 20 for supplying the hydraulic oil to the other and recovering the hydraulic oil from the other.

  The hydraulic oil supply device Z slides the outer cylinder 6 in the length direction of the rotating base 2 by supplying hydraulic oil to one of the hydraulic chambers 11 and 12 and collecting hydraulic oil from the other. The propulsion direction reversing mechanism is configured to reverse the positional relationship between the fluid suction port 3 and the fluid discharge port 4 and the fluid guiding path 5 by moving the suction direction and the discharge direction of the water.

  The propulsion device 1 of the present embodiment configured as described above is used in a state where the propulsion device 1 is mounted on a ship and positioned underwater. In the state where the propulsion device 1 is positioned in water, The acceleration part A, the fluid guiding path 5, the fluid collecting path B, and the fluid discharge port 4 are all filled with water.

The drive shaft 13 is driven by being rotated by a marine engine.
When the marine vessel is advanced, hydraulic oil is supplied to the one hydraulic chamber 11 by the hydraulic oil supply device Z, and the outer cylinder 6 is rotated as shown in FIGS. 4A and 5. It is moved to the other end of the base 2.

  In this state, the fluid suction port 3 is brought into contact with the fluid introduction plate 7 formed on one end surface of the rotating base 2, and the fluid acceleration part A is formed therebetween.

  Accordingly, when the drive shaft 13 is rotated, the rotating base 2 rotates together with the drive shaft 13, and the water located in the liquid accelerating portion A is subjected to centrifugal force by the rotation of the rotating base 2 and the fluid. It is fed into the guide path 5 and further discharged from the fluid discharge port 4 to the outside through the fluid guide path 5 and the fluid collecting path B.

When a speed is given to the water in the fluid acceleration section A, the internal pressure is reduced, and external water is continuously sucked into the propulsion device 1 from the fluid suction port 3 due to the pressure drop.
Therefore, while the rotation of the rotary base 2 is continued, water is continuously discharged from the fluid discharge port 4.

A reaction force when water is discharged from the fluid discharge port 4 acts on the ship as a propulsion force in the forward direction via the propulsion device 1.
The propulsive force depends on the rotation speed of the rotating base 2.

On the other hand, since the water flow in the propulsion device 1 described above moves in one flow path along the length direction of the flow path, the energy loss of the water flow is the friction loss with the inner wall of the flow path. Only, and can generate propulsive force efficiently.
In addition, since water flows in a flow path having a fixed shape, the pressure fluctuation between adjacent positions of the water flow is extremely small, and as a result, the occurrence of cavitation is suppressed, and the efficiency is reduced from this point as well. While being able to suppress, the breakage of the structural member by the vibration etc. resulting from cavitation can be prevented.

  On the other hand, when the ship is moved backward, it is realized by moving the outer cylinder 6 toward the one end of the rotating base 2 by the hydraulic oil supply device Z.

  When the outer cylinder 6 is thus moved, as shown in FIGS. 4B and 6, the fluid suction port 3 is separated from one end of the rotating base 2, and the fluid discharge port 4 is rotated. It is made to adjoin to the other end part of the base 2.

  As a result, as shown in FIG. 4B, the fluid collecting path B is narrowed to be a fluid accelerating portion, and the fluid accelerating portion A is widened to be a fluid collecting portion. That is, the one with the larger inclination from the fluid suction port to the fluid guiding path becomes the fluid acceleration portion, and the one with the smaller inclination becomes the fluid collecting portion. Here, the force with which water is sucked by the rotation of the rotating base 2 is determined by the magnitude of the inclination. Therefore, by changing the axial relative position of the outer cylinder 6 and the rotating base 2, the fluid suction port and the fluid discharge port are changed. The exit is reversed.

  As a result, the water flow in the propulsion device 1 is reversed, and a propulsive force in the reverse direction of the ship is obtained.

Next, a second embodiment of the present invention will be described with reference to FIG.
In addition, since it is the same as that of 1st Embodiment mentioned above about the principal part, description is simplified using the same code | symbol.

  In the present embodiment, the end portion on the fluid discharge port 4 side of the fluid guide path 5 is positioned on the outer side in the rotational radius direction of the rotary base 2 than the end portion on the fluid suction port 3 side. The rotary base 2 is formed so as to be inclined with respect to the rotation axis.

  The inclination of the fluid guide path 5 is such that the distance from the end of the fluid guide path 5 on the fluid suction port 3 side and the rotation axis of the rotary base 2 is L1, and the end of the fluid discharge path 4 side is When the distance from the rotation axis of the rotary base 2 is L2, it is desirable that L2 ≧ 1.1 × L1.

  By providing such an inclination, by making the centrifugal force generated on the fluid discharge port 4 side of the fluid flow path 5 larger than the centrifugal force generated on the fluid suction port 3 side, By reducing the pressure on the fluid discharge port 4 side, the flow velocity toward the fluid discharge port 4 can be increased.

  Next, a third embodiment of the present invention will be described with reference to FIGS.

  In the present embodiment, an input shaft 22 is orthogonally connected to the drive shaft 13 via a bevel gear 21, the drive shaft 13 and the input shaft 22 are assembled in a single casing 23, The casing 23 is provided with a propulsion direction adjusting mechanism X that rotates the casing 23 around the input shaft 22 to change the direction of the rotation axis of the rotating base 2.

  The propulsion direction adjusting mechanism X includes a driven gear 24 attached to the casing 23 and a drive gear 25 that is driven to rotate by a drive source different from the input shaft 22 and meshed with the driven gear 24. The drive gear 25 is driven in conjunction with a steering mechanism.

  With such a configuration, it is possible to change not only the reverse direction shown in FIG. 9 but also the propulsion direction within a range of 360 °, while reducing the number of movable parts in the main body portion of the propulsion device 1.

  Furthermore, the 4th Embodiment of this invention is described with reference to FIG. 10 and FIG.

  In the present embodiment, a ring gear 26 is integrally attached to the outer periphery of the rotating base 2 so as to be coaxial with the rotation axis thereof, and the rotating base 2 is rotatably accommodated in a casing 27. A pinion gear 29 that is integrally attached to a drive shaft 28 that is rotatably supported by 27 is meshed, and an input shaft 30 that is rotatably supported by the casing 27 is engaged with the drive shaft 28 via a bevel gear 31. A configuration in which the propulsion direction adjusting mechanism X that changes the direction of the rotation axis of the rotating base body 2 is connected to the casing 27 by rotating the casing 27 around the input shaft 30 is provided. Yes.

  By adopting such a configuration, it is possible to change not only the reverse direction shown in FIG. 11 but also the propulsion direction within a range of 360 ° while reducing the movable parts in the main body portion of the propulsion device 1.

  In addition, the front portion of the fluid suction port 3 of the rotating base 2 can be greatly opened, so that the water can smoothly flow into the fluid suction port 3.

A fifth embodiment of the present invention will be described with reference to FIG.
In addition, about the fundamentally same part as 3rd Embodiment shown in FIG.8 and FIG.9, description is simplified using the same code | symbol.

  In the present embodiment, in addition to providing the propulsion direction adjusting mechanism X for changing the direction of the rotation axis of the rotating base 2, as shown in FIG. In this configuration, the diaphragm 6b is removed.

  By setting it as such a structure, the structure of the rotary base | substrate 2 can be simplified and reduced in weight. Further, the resistance at the time of fluid discharge can be reduced by eliminating the throttle portion around the rectifying protrusion 8.

A sixth embodiment of the present invention will be described with reference to FIG.
In addition, about the fundamentally same part as 5th Embodiment shown in FIG. 12, description is simplified using the same code | symbol.

  In the present embodiment, the length of the rotating base 2 in the axial direction is shortened (about half that of the fifth embodiment).

  By adopting such a configuration, the structure of the rotating base 2 can be further simplified and reduced in weight. Thereby, propulsion efficiency can be improved.

  FIGS. 14 to 19 show modifications of the present invention. A propulsion device denoted by reference numeral 40 includes a rotating base 41 that is rotationally driven, and a casing 42 that rotatably stores the rotating base 41. A fluid suction port 42a is provided at one end of the casing 42 so as to be opposed to one end of the rotating base 41, and a fluid discharge port 42b is provided at the other end to be opposed to the other end of the rotating base 41. A fluid guide path 43 is formed in the rotary base 41 and communicated with the fluid suction port 42a and the fluid discharge port 42b at positions spaced outward in the rotational radius direction. , With respect to the rotational axis of the rotary base 41 so that the end on the fluid discharge port 42b side is located outward of the rotary base 41 in the radial direction of rotation relative to the end on the fluid suction port 42a side. By being formed by obliquely, it has been made with the fluid accelerating section that gives a centrifugal force to the water in the fluid guide passage 43.

  The casing 42 is formed in a cylindrical shape, and in this example, includes a front casing 44, a center casing 45, and a rear casing 46 that are divided into three in the axial direction.

  Flange 44a, 45a, 46a is provided on the outer periphery of the end of these front casing 44, center casing 45, and rear casing 46, respectively, and these flanges 44a, 45a, 46a are connected by bolts, Alternatively, the cylindrical casing 42 is configured by bonding with an adhesive or the like. Note that these flange and bolt coupling means protrude from the outer peripheral surface of the casing 42 and increase the resistance of water during propulsion, so it is desirable to employ, for example, a welding coupling means or a screw fastening coupling means. Moreover, the casing 42 may be constituted by an inner cylinder and an outer cylinder, and a structure in which they are coupled by welding or screwing may be employed.

  The rotary base 41 is rotatably accommodated in the center casing 45, and a drive shaft 47 for rotating the rotary base 41 is integrally attached to an end portion opposed to the fluid suction port 42a. On the other end, a rectifying protrusion 41a is formed which tapers toward the fluid discharge port 42b.

  A plurality of rectifying plates 48 are provided on the inner surface of the portion of the front casing 44 where the fluid discharge port 42b is formed so as to be substantially along the rotational axis of the rotating base 41.

  The rectifying plate 48 is arranged so as to go from the inner wall of the front casing 44 toward the center, and is provided in a state slightly inclined with respect to the central axis of the front casing 44.

  The inclination is such that the direction of water discharged from the rotating base 41 is a direction in which the axial direction and the rotating direction of the rotating base 41 are combined, and the direction is inclined with respect to the central axis of the front casing 44. Therefore, it is provided in order to keep the surface of each of the rectifying plates 48 along the flow direction of water as much as possible.

  The propulsion device 40 of the present embodiment configured as described above is fixed to a ship or the like via the casing 42, and a prime mover or the like is connected to the drive shaft 47.

  When the drive shaft 47 is rotated, the rotating base 41 is rotated, and centrifugal force is applied to the water in the fluid guiding path 43 of the rotating base 41.

As described above, the water to which centrifugal force is applied is discharged from the rotating base 41 due to the inclination of the fluid guiding path 43, and the flow is adjusted by the rectifying plate 48 and jetted from the fluid discharge port 42b to the outside. Is done.
The reaction force at the time of injection becomes the propulsive force of a ship or the like to which the propulsion device 40 is attached.

  In this example, since the rotating portion is only the rotating base 41, there is an advantage that the driving force is small.

Further, since it is not necessary to rotate the casing 42 that forms the outline of the apparatus, the casing 42 can be fixed to a ship or the like.
Therefore, the casing 42 itself can be used as a fixture for the propulsion device 40, and the propulsion device 40 can be securely fixed, and a stable operation can be obtained while suppressing unnecessary blurring and the like.

  For this purpose, for example, a fixing stay 49 can be integrally provided in advance on the outer surface of the center casing 45 as shown by a chain line in FIG.

  Note that water repellent paint may be applied to the inner and outer peripheral surfaces of the guide path of the rotating base 41, the inner wall of the casing, the inner wall of the casing and the current plate in FIG. When the water repellent paint is applied in this way, friction generated between water and the inner wall of the flow path is reduced, the negative pressure on the rotating base is lowered, and the fuel consumption of the power source of the rotating base is suppressed.

  According to the present invention, by realizing a propulsion device that does not have a screw, generation of cavitation during propulsion can be suppressed as much as possible, and durability can be greatly improved.

DESCRIPTION OF SYMBOLS 1 Propulsion apparatus 2 Rotating base | substrate 3 Fluid suction port 4 Fluid discharge port 5 Fluid guide path 6 Outer cylinder 6a Restriction part 6b Restriction part 7 Fluid introduction board 8 Protrusion for flow control 9 Annular protrusion 10 Annular protrusion 11 Hydraulic chamber 12 Hydraulic chamber 13 Drive shaft 14 hydraulic oil supply path 15 hydraulic oil supply path 16 rotary joint 17 oil pan 18 oil pump 19 accumulator 20 control valve 21 bevel gear 22 input shaft 23 casing 24 driven gear 25 drive gear 26 ring gear 27 casing 28 drive shaft 29 pinion gear 30 input shaft 31 Bevel gear 40 Propulsion device 41 Rotating base 41a Rectification protrusion 42 Casing 42a Fluid suction port 42b Fluid discharge port 43 Fluid guideway 44 Front casing 44a Flange 45 Center casing 45a Flange 46 Rear casing 46a Flange 47 Drive shaft 48 Rectifying plate 49 Stay A Fluid acceleration part B Fluid collecting path X Propulsion direction adjustment mechanism Z Hydraulic oil supply device (Propulsion direction reversal mechanism)

Claims (5)

A propulsion device that is attached to a ship traveling on water, sucks in water, and gives a propulsive force to the ship by a reaction force generated when discharging the sucked water,
A cylindrical rotating base that is rotationally driven;
A casing for rotatably storing the rotating base;
A plurality of rectifying plates provided in a direction from the inner surface of the casing toward the center of the casing,
One end of the casing is opposed to one end of the rotating base, the fluid suction port for sucking the water, the other end of the casing is opposed to the other end of the rotating base, and A fluid discharge port for discharging water,
The rotating base is provided with a fluid guide path that is positioned away from the rotational axis of the rotating base in the rotational radial direction and guides the water sucked into the fluid suction port to the fluid discharge port,
The fluid guiding path is
It is formed inside the cylindrical rotary base so as to penetrate from the end on the fluid suction port side to the end on the fluid discharge port side,
The end on the fluid discharge port side is inclined with respect to the rotation axis of the rotating base so that the end on the fluid suction port side is positioned on the outer side in the rotational radius direction of the rotating base,
The sum of the cross-sectional areas of the cross section perpendicular to the rotational axis of the rotary base at the end on the fluid suction port side is the cross-sectional area of the cross section perpendicular to the rotational axis of the rotary base at the end on the fluid discharge port Formed larger than the sum of
The other end of the rotating base is formed with a rectifying protrusion that tapers toward the fluid discharge port,
The rectifying plate has a shape having an end along the ridge line of the rectifying protrusion,
Propulsion device. Furthermore, the rectifying plate is provided so as to be inclined in a direction in which the rotation axis direction of the rotary base and the rotation direction of the rotary base are combined.
The propulsion device according to claim 1.   A propulsion device that is attached to a ship traveling on water, sucks in water, and gives a propulsive force to the ship by a reaction force generated when discharging the sucked water,
  A cylindrical rotating base that is rotationally driven;
  A casing for rotatably storing the rotating base;
  A plurality of rectifying plates provided in a direction from the inner surface of the casing toward the center of the casing,
    One end of the casing is opposed to one end of the rotating base, the fluid suction port for sucking the water, the other end of the casing is opposed to the other end of the rotating base, and A fluid discharge port for discharging water,
    The rotating base is provided with a fluid guide path that is positioned away from the rotational axis of the rotating base in the rotational radial direction and guides the water sucked into the fluid suction port to the fluid discharge port,
      The fluid guiding path is
        It is formed inside the cylindrical rotary base so as to penetrate from the end on the fluid suction port side to the end on the fluid discharge port side,
        The end on the fluid discharge port side is inclined with respect to the rotation axis of the rotating base so that the end on the fluid suction port side is positioned on the outer side in the rotational radius direction of the rotating base,
        The sum of the cross-sectional areas of the cross section perpendicular to the rotational axis of the rotary base at the end on the fluid suction port side is the cross-sectional area of the cross section perpendicular to the rotational axis of the rotary base at the end on the fluid discharge port Formed larger than the sum of the
  Propulsion device.   The shape of the cross section perpendicular to the rotation axis of the rotating base at the end of the fluid guide path on the fluid discharge port side is substantially oval along the outer periphery of the rotating base.
  The propulsion device according to claim 1 or 3.   The shape of the cross section perpendicular to the rotation axis of the rotating base at the end of the fluid guiding path on the fluid suction port side is substantially oval along the outer periphery of the rotating base,
  The shape of the cross section orthogonal to the rotation axis of the rotary base at the end of the fluid guide path on the fluid discharge port side is more than the shape of the cross section orthogonal to the rotation axis of the rotary base at the end on the fluid suction port side. The minor axis is short, and is substantially oval along the outer periphery of the rotating base.
  The propulsion device according to claim 4.