JPH0546696U - Water intake device for water jet pump of combined support type ultra high speed ship by buoyancy and wing lift - Google Patents

Abstract

(57) [Summary] [Purpose] There are no restrictions on the shape of the upstream end of the intake passage,
(EN) Provided is a water intake device for a water jet pump of a composite support type ultra-high speed ship, which is small in size and has a simple structure and uses buoyancy and wing lift. [Structure] The lower hull 3 for generating buoyancy of the high-speed ship 1 is provided with a flash-type water intake 15 facing the outer surface of the lower hull 3.
5, a water intake passage 17 that extends to the water jet 8 through the lower floating body 3 and the strut member 5 is provided, and the rear edge portion of the water intake port 15 has a protruding position that partially protrudes outside the outer surface of the lower hull 3. , A movable flap 18 for introducing water flow that can be moved to and from the retracted position that has retracted into the outer surface of the lower hull.
And a hydraulic cylinder 20 for switching the position of the movable flap 18 is provided. The movable flap 18 is provided with a bottom wall portion 23 and a pair of side wall portions 24 provided upright on both ends thereof, and a rear end portion of the movable flap 18 is rotatably supported by a pivot pin 25. A free rotor 21 for preventing water flow separation is provided at the front edge portion 15b of the water intake port 15.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water jet pump for a water jet pump of a composite support type ultra-high speed ship, which uses buoyancy and wing lift, and in particular, an upper hull, a lower hull for generating buoyancy, and a strut member connecting the upper hull and the lower hull, The present invention relates to an improved suction performance of a water jet pump at low speed before take-off in a composite support type ultra-high-speed ship with buoyancy and wing lift equipped with a wing for generating lift and a water jet pump for propulsion.

[0002]

[Prior Art]

 Conventionally, water jet propulsion vessels propelled by water jets generated by pumps have been widely put to practical use in small high-speed vessels, etc., and recently, a wing lift type ultra-high-speed vessel called jet foil has been widely put to practical use. In addition, the development of an ultra-high-speed ship that is larger than a jet foil and is of a composite support type that uses the buoyancy of the lower hull and the lift of the wings is currently being promoted. The water jet propulsion ship is provided with a water intake passage extending from the water intake opening to the water jet pump, and propels the water sucked from the water intake by a pump and ejects it backward in the air above the water surface. Since it is a structure that generates force, and the structure of the intake port influences the suction performance of the pump, that is, the propulsion performance, various intake structures for water jet propulsion vessels have been proposed in the past, and the water flow Known are a pot-type intake that opens in a face-to-face relationship, a scoop-type intake that projects a scoop member for water flow introduction from the bottom of the ship, and a flush-type intake that opens flat in the same plane as the bottom of the ship. ing. For example, in Japanese Utility Model Laid-Open No. 60-92700, a guide groove having a U-shaped cross section is formed outside the upstream end portion of the intake passage, and the guide groove has a U-shaped cross section and a fan-shaped movable scoop member in a side view. There is described a water jet propulsion ship that is movably mounted over a projecting position where the ship is largely projected outside the outer surface of the ship bottom and a retracted position where the ship retreats into the outer surface of the ship bottom.

[0003]

[Problems to be solved by the device]

 In the above-mentioned pot-type or scoop-type intake structure, an intake member protruding outside the bottom of the ship is provided and the intake port is formed through the intake member. It is not suitable for high-speed water jet propulsion vessels due to increased propulsion resistance. The flush-type intake structure is advantageous in terms of propulsion resistance because it does not allow any member to project outside the bottom of the ship, but it is difficult to sufficiently improve suction performance at low speeds. ..

In particular, for jet foils that sail at high speeds of 45 to 50 knots, and ultra-high-speed ships of the combined support type that use buoyancy and wing lift, an optimal intake structure will be adopted in the wing running state. Sufficient suction performance is not obtained at low speed before take-off (boat running), and cavitation occurs and the pump stalls in some cases. That is, in FIG. 10, the curve A shows the total pressure of the water flow outside the intake port, the curve B shows the total pressure of the water flow inside the intake passage, and the total pressure inside the intake passage is the loss component C near the intake port. However, since the total pressure outside the intake is smaller and the loss C also increases on the low speed side, the total pressure H2 is sufficiently large in the wing running state, but the suction performance of the pump can be secured. In the boat running condition before take-off, the total pressure H1 becomes small and the suction performance of the pump deteriorates, cavitation deteriorates, and the pump may stall. Here, depending on the structure of the intake port, it is not impossible to secure the required pump suction performance even at low speeds, but in that case the propulsion resistance in the wing running state will inevitably increase, leading to an increase in fuel consumption. Therefore, it is not preferable.

On the other hand, the water intake device of the water jet propulsion ship described in the above publication is not intended for a jet support or a super-high speed ship of a composite support type by buoyancy / wing lift, and the movable scoop member is a side surface. Since it is configured as a fan shape and the position is switched by rotating it around a pivot shaft, the upstream end portion of the intake passage must be formed in a side-shape and arc-shape. The degree of freedom in designing the upstream end of the intake passage is significantly limited, and it is not applicable when the upstream end of the intake passage is formed in a substantially straight shape in order to improve suction performance and simplify the structure. However, even if the upstream end of the intake passage is formed in an arc shape, if the radius of curvature is large, the turning radius of the movable scoop member becomes large and it cannot be put to practical use at all. In addition, there is a problem that the structure for sealing the moving gap where the movable scoop member moves in a watertight manner becomes large and complicated. An object of the present invention is to provide an intake device for a water jet pump of a composite-supported ultra-high-speed ship, which is compact and has a simple structure, and which has no restrictions on the shape of the upstream end portion of the intake passage and has buoyancy and wing lift. is there.

[0006]

[Means for Solving the Problems]

 A water jet pump water intake device for a composite-supported ultra-high-speed ship using buoyancy and wing lift according to claim 1, comprising: an upper hull, a lower hull for generating buoyancy, and a strut member connecting the upper hull and the lower hull. A buoyancy / wing lift combined-support type ultra-high-speed ship equipped with a lift-generating wing and a water jet pump for propulsion, a flash-type intake port facing the outer surface of the lower hull is provided A water intake passage connected to the mouth and extending through the lower hull and strut members to the water jet is provided, and at the trailing edge of the water intake port, a protruding position that partially protrudes outside the outer surface of the lower hull and the outer surface of the lower hull. It is characterized in that a movable flap member for introducing a water flow that is movable over the retracted position where the movable flap member is moved in and out is provided, and a drive means for switching the position of the movable flap member is provided. That.

According to a second aspect of the present invention, there is provided a water jet pump for a water jet pump of a composite support type ultra-high speed ship using buoyancy and wing lift, wherein the movable flap member includes a bottom wall portion and a bottom wall portion thereof. The movable flap member is provided with a pair of side walls provided upright at both ends thereof, and a rear end portion of the movable flap member is rotatably supported by a pin member.

According to a third aspect of the present invention, there is provided a water jet pump for a water jet pump of a composite-supported ultra-high-speed ship by means of buoyancy and wing lift, wherein: It is characterized in that a rotor for preventing peeling is provided.

According to a fourth aspect of the present invention, there is provided the water intake device for a water jet pump of a composite-supported ultra-high-speed ship using buoyancy and wing lift in the water intake device according to the third aspect, wherein the tip of the bottom wall of the movable flap member is provided. It is characterized in that a rotor for preventing separation of water flow is provided in the.

According to a fifth aspect of the present invention, there is provided a water jet pump water intake device for a composite support type ultra-high speed ship using buoyancy and wing lift, which connects an upper hull, a lower hull for generating buoyancy, and an upper hull and a lower hull. In a composite-supported ultra-high-speed ship with buoyancy and wing lift equipped with strut members, wings for generating lift, and a water jet pump for propulsion, a flash-type water intake facing the outer surface of the lower hull was provided. , A water intake passage connected to the water intake and extending through the lower hull and the strut member to the water jet is provided, and the rear edge of the water intake is composed of a bottom wall and a pair of side walls at both ends thereof. The movable scoop member is provided with a movable scoop member for water flow introduction that is movable between a protruding position that partially protrudes outside the outer surface of the lower hull and an retracted position that retracts into the outer surface of the lower hull. To It is characterized in that it is slidably mounted in a guide groove on the inner surface of the water intake passage and provided with drive means for switching the position of the movable scoop member.

[0011]

[Action]

 In the water jet pump water intake device for a composite-supported ultra-high-speed ship by buoyancy / wing lift according to claim 1, basically, the water introduced from the Rafush-type water intake facing the outer surface of the lower hull is It is sucked into the water jet pump through the water intake passage in the lower hull and strut members, and is jetted rearward from the water jet pump at a height above the water level. When the boat is traveling at a low speed before the take-off, if the movable flap member is switched to the projecting position by the drive means and the movable flap member is held in the projecting position partially projecting to the outside of the lower hull, the water of the movable flap member is lost. The introduction function significantly improves the suction performance of the pump. In addition, when the wing runs at high speed after take-off, the total speed of the water flow is large due to the high ship speed, and sufficient pump suction performance is ensured.Therefore, the drive means switches the movable flap member to the retracted position. Move the movable flap member into the outer surface of the lower hull. At this time, the intake will be a flash type intake and will not increase the propulsion resistance. Moreover, since the movable flap member is switched in position by rotation, it can be provided without any restriction on the shape and structure of the upstream portion of the water intake passage, and the structure is relatively simple.

[0012] In the water jet pump water intake device of the composite support type ultra-high speed ship by the buoyancy and wing lift according to claim 2, basically, the same action as in claim 1 is obtained, and the movable flap member is Since the bottom wall portion and the pair of side wall portions provided upright on both ends thereof are provided, the water introduction action thereof is strengthened. Further, since the rear end portion of the movable flap member is rotatably supported by the pin member, the position can be switched by rotating the movable flap member with the pin member as the rotation center, and a simple drive means is provided. You can switch the position with.

In the water jet pump water intake device of the composite support type ultra-high speed ship by the buoyancy and wing lift according to the third aspect, the same operation as in the second aspect is basically obtained. In addition, since a rotor for preventing water flow separation is provided at the front edge of the intake port, rotation of this rotor can prevent separation of the water flow at the front edge part of the intake port and improve suction performance. I can.

In the water jet pump water intake device of the composite support type ultra-high-speed ship by the buoyancy and wing lift according to the fourth aspect, the same operation as in the third aspect is basically obtained. Further, since the rotor for preventing water flow separation is provided at the tip of the bottom wall of the movable flap member, the rotation of this rotor suppresses the water flow separation at the tip of the bottom wall of the movable flap member to prevent water intake. The pressure loss due to the device can be reduced.

According to a fifth aspect of the present invention, there is provided a water jet pump water intake pump for a composite support type ultra-high-speed ship using buoyancy and wing lift, in place of the movable flap member at a projecting position and a retracting position. Since the movable scoop member that can be switched is provided, basically the same operation as in claim 1 can be obtained. Moreover, the movable scoop member is composed of the bottom wall portion and the pair of side wall portions at both ends thereof, and the movable scoop member is slidably mounted in the guide groove of the inner surface of the water passage. The guide mechanism is simplified and the structure of the drive means is also simplified.

[0016]

[Effect of the device]

 As described in the section of the action, the following effects can be obtained. According to the water jet pump water intake device of the first aspect, when the boat is traveling at low speed before take-off, the movable flap member is held in the projecting position so that the suction performance of the pump is achieved by the water introduction action of the movable flap member. Can be significantly improved. Further, when the wing is running at high speed after take-off, by holding the movable flap member in the retracted position, it is possible to use a flash-type water intake port and prevent an increase in propulsion resistance. Further, since the movable flap member is switched in position by rotation, it can be provided without any restriction on the shape and structure of the upstream portion of the water intake passage, and the structure is relatively simple. ..

According to the water jet pump water intake device of the second aspect, basically, the same effect as that of the first aspect can be obtained, and the water introducing action of the movable flap member can be strengthened. The position can be switched by rotating the pin around the pin member, and the position can be switched by a simple drive means.

In the water jet pump water intake device according to the third aspect, the same effect as that of the second aspect is basically obtained. Further, by providing a rotor for preventing separation of the water flow at the front edge of the intake port, separation of the water flow at the front edge of the intake port can be prevented, and the suction performance can be improved.

According to the water jet pump water intake device of the fourth aspect, basically the same effect as that of the third aspect can be obtained. In addition, by providing a rotor for preventing water flow separation at the tip of the bottom wall of the movable flap member, the separation of water flow at the tip of the bottom wall of the movable flap member is suppressed, and the pressure from the water intake device is reduced. Loss can be reduced.

In the water jet pump water intake device according to the fifth aspect, basically the same effect as that of the first aspect can be obtained. Moreover, the movable scoop member is composed of the bottom wall portion and the pair of side wall portions at both ends thereof, and the movable scoop member is slidably mounted in the guide groove of the inner surface of the water passage. The guide mechanism is simplified and the structure of the drive means is also simplified.

[0021]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, a composite support type ultra-high-speed ship 1 based on buoyancy and wing lift is currently under development. The ultra-high-speed ship 1 includes an upper hull 2, a lower hull 3, and an upper hull. The front center strut 4 and the rear center strut 5 that integrally connect the lower hull 3 and the lower hull 3, and a pair of left and right front wing support members 6 provided on the left and right sides of the front center strut 4 that are front parts. A pair of left and right front wing support members 6 that respectively support a pair of left and right wings 6A, and a pair of left and right rear wing support members 7 provided on both left and right sides of the rear center strut 5 A pair of left and right rear wing support members 7 for supporting the respective wing 7A, a water jet pump 8 provided at the bottom of the upper hull 2 immediately above the rear end of the upper end of the rear center strut 5, and a water jet pump. With water intake device 9 There.

Next, the water jet pump 8 and the water intake device 9 will be described. As shown in FIGS. 3 to 5, with respect to the water jet pump 8, an impeller 12 connected to a pump drive shaft 11 and a stator 13 are housed in a pump housing 10 thereof, and the pump drive shaft 11 is not shown. It is configured to be rotationally driven in a predetermined direction by the driving machine (internal combustion engine or electric motor). Reference numeral 14 is a shaft sealing device. The water intake device 9 is a flash-type water intake 15 that is opened at the bottom of the lower hull 3, and is connected to the water intake 15 and extends through the insides of the lower hull 3 and the rear struts 5 to the suction port 16 of the pump 8. An upwardly inclined water intake passage 17, a movable flap 18 pivotally attached to a rear edge portion 15a of the water intake 15, a hydraulic cylinder 20 rotatably driving the movable flap 18 via an arm member 19, and the water intake 15 And a free rotor 21 provided at the front edge of the.

The water intake passage 17 is formed in a rectangular cross section, and the water intake 15 at the upstream end of the water intake passage 17 is formed in a rectangular shape elongated in the front-rear direction. As shown in FIGS. 4 to 6, the movable flap 18 includes a shaft-shaped portion 22 extending in the left-right direction, a bottom wall portion 23 having a flap-shaped cross section that is integrally fixed to the shaft-shaped portion 22 and extends forward. The bottom wall portion 23 has a pair of substantially fan-shaped left and right parallel side wall portions 24 that are integrally provided upright on both left and right ends, and a pivot pin 25 extending in the left-right direction penetrates the shaft portion 22. The left and right ends of the pivot pin 25 are fixed to each other and are rotatably supported by bearings 26 on the lower hull 3 side, and a pair of left and right side walls 24 can be accommodated in the side wall 17a of the water intake passage 17. A fan-shaped recess 27 is formed.

In order to drive the movable flap 18 to rotate, the arm member 19 is fixed to the pivot pin 25 extending to the side of the water intake passage 17 and extends upward. Is connected to the tip of the rod 20a of the hydraulic cylinder 20 by a pin, and the base end of the cylinder body 20b of the hydraulic cylinder 20 is connected to a member on the lower hull 3 side by a pin to retract the rod 20a of the hydraulic cylinder 20. In this state, as shown by the solid line in FIG. 4, the movable flap 18 is inclined forward and downward with respect to the bottom surface 3a of the lower hull 3, and most of the movable flap 18 is projected to the outside of the bottom surface 3a. Therefore, the guide flap 28 for introducing the seawater is formed by the movable flap 18 at the protruding position. On the other hand, when the rod 20a of the hydraulic cylinder 20 is extended, the movable flap 18 comes to the retracted position where it does not project to the outside of the ship bottom surface 3a as shown by the phantom line in FIG. At this time, the lower surface of the bottom wall portion 23 of the movable flap 18 is flush with the ship bottom surface 3a, and the left and right side wall portions 24 are fitted in the corresponding recesses 27, respectively, and the inner surface of the side wall portion 24 and the side wall of the intake passage 17 are fitted. It is flush with the inner surface of the portion 17a.

The free rotor 21 is rotatably attached to a rotor accommodating portion 29 formed on the bottom portion 3b of the lower hull 3 at the front edge portion 15b of the water intake port 15. The left and right side walls of the rotor accommodating portion 29 are rotatably supported by bearings, and the lower end of the free rotor 21 is provided so as to slightly project to the outside of the ship bottom surface 3a. The free rotor 21 may be rotationally driven by the rotational driving means in the clockwise direction in FIG. 4 so that its peripheral speed becomes the same as the water flow.

The operation of the water intake device 9 of the water jet pump 8 described above will be described. When navigating at a relatively low speed before the ultra high-speed ship 1 takes off (mainly in a boat-running state supported by the buoyancy acting on the lower hull 3 and the upper hull 2), it is explained in the section of the conventional technology. As described above, since the total pressure of the water flow in the water intake passage 17 is small, the suction performance of the pump 8 is lowered, but the movable flap 18 is switched to the projecting position by the hydraulic cylinder 20 during this boat running. As a result, the suction performance of the pump 8 is secured by the water introduction action of the movable flap 18. On the other hand, for example, after the super high-speed ship 1 takes off (when the wing is in a state of being supported in a complex manner by the buoyancy acting on the lower hull 3 and the lift acting on the front and rear wings 3A and 3B), When navigating at a speed of 50 knots, the suction performance of the pump 8 is high because the total pressure of the water flow in the intake passage 17 is sufficiently high, but during this wing run, the movable flap 18 is moved to the retracted position by the hydraulic cylinder 20. Can be switched. As a result, the intake port 15 becomes a flash-type intake port, and the movable flap 18 does not project outside the ship bottom surface 3a and the propulsion resistance does not increase, which is advantageous in terms of fuel economy. During this wing run, the free rotor 21 rotates in the same direction as the water flow (clockwise direction) so that its peripheral speed becomes substantially the same as the speed of the water flow, so that the water flow at the front edge portion 15b of the intake port 15 increases. Peeling is less likely to occur, and propulsion resistance is reduced.

It is desirable to provide a small-diameter free rotor 31 also on the front edge of the bottom wall portion 23 of the movable flap 18 as shown by an imaginary line in FIG. Since it rotates in the direction (clockwise direction), similarly to the above, separation is less likely to occur in the water flow behind the front edge of the bottom wall 23, and propulsion resistance is reduced. The movable flap 18 of this embodiment has its rear end pivotally supported by a pivot pin 25 and is configured to switch positions by being rotationally driven by the hydraulic cylinder 20, so that the overall size and size are simple. It is configured and can be driven by a comparatively small hydraulic cylinder 20. 5 and 6, a pair of left and right hydraulic cylinders 20 are provided to drive the movable flap 18, but it may be configured to be driven by one hydraulic cylinder. The flap 18 may be configured to be driven by a driving means such as an electric motor.

Here, a description will be given of a modified example of the movable flap 18 of the above-described embodiment and the hydraulic cylinder 20 that rotationally drives the movable flap 18, and as shown in FIG. 7, the movable flap 18 is arranged at the rear edge portion 15 a of the water intake port 15. The movable flap 18A provided is composed of a flap member having a solid shape and a wing-shaped cross section, and the rear end portion of the movable flap 18A is pivotally attached to the lower hull 3 by a pivot pin 25 so that the movable flap 18A is movable. A pair of left and right side wall portions 24 similar to the above are integrally provided upright on the flap 18A, and an arm 19 is fixed to one end of a pivot pin 25 that pivotally supports the movable flap 18A on the lower hull 3. On the other hand, the tip of the rod 20a of the hydraulic cylinder 20A, which is obliquely arranged rearward, is pin-connected to the upper end of the arm 19, and the base end of the cylinder body 20b of the hydraulic cylinder 20A is pinned to the lower hull 3. Are combined. Similarly, the left and right side wall portions 24 are configured to be accommodated in the recesses 27 of the side wall portion 17a of the water intake passage 17, and the movable flap 18A is also shown in a solid line in a projected position and in a virtual line in a retracted position. The rotary position is freely switchable depending on the position, and the position of the movable flap 18A is switched by the hydraulic cylinder 20A. Since the other configurations are the same as those of the above-described embodiment, the same reference numerals are given to the same configurations and the description thereof will be omitted.

Next, another embodiment will be described, but the same components as those in the above embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only different configurations will be described. As shown in FIGS. 8 and 9, the upstream portion of the water intake passage 17 is formed in a downwardly sloping shape, and a movable scoop 40 is slidably arranged at the rear edge of the water intake 15. .. The movable scoop 40 is formed in a groove-shaped cross section by a bottom wall 41 and a pair of left and right side walls 42 that are integrally provided upright at the left and right ends of the bottom scoop 40, and the left and right side walls of the water intake passage 17. A guide groove 43 for accommodating and guiding the movable scoop 40 is formed in the movable scoop 40 such that the inner surface of the movable scoop 40 and the inner surface of the water intake passage 17 are flush with each other on the bottom wall 17b and the bottom wall 17b. As indicated by phantom lines in FIG. 8, reference numeral 40 is movable between a projecting position where the lower hull 3 partially projects outside the bottom surface 3a and a retracted position where the lower hull 3 is retracted upward from the bottom surface 3a. Is attached to. Further, a slit 44 extending in the direction of the water intake passage 17 is formed at the center of the bottom wall portion 17b of the water intake passage 17, and is fixed to the bottom wall portion 41 of the movable scoop 40 and inserted through the slit 44 to allow the bottom wall portion 41 to pass therethrough. Is provided on the outside of the water intake passage 17, and the tip end of the rod 20a of the hydraulic cylinder 20B, which is obliquely provided on the lower side of the water intake passage 17, is pin-connected to the connector 45, and seawater flowing in from the slit 44 is flowed. A partition wall 46 for shutting off the partition wall is provided, and the rod 20a of the hydraulic cylinder 20B penetrates the partition wall 46 in a watertight manner.

The movable scoop 40 is position-switched between the projecting position and the retracting position by the hydraulic cylinder 20B, is held in the projecting position when the boat is running, and is the same as in the above-described embodiment. It will be held in the retreat position when running. An electric motor other than the hydraulic cylinder 20B can be used as the driving means for driving the movable scoop 40, and the front edge portion of the water intake port 15 of this embodiment is similar to the free rotor 21. It is desirable to provide a free rotor of In the structure of this embodiment, the same action as that of the above-described embodiment can be obtained, but when the movable scoop 40 is switched from the projecting position to the retracted position, the dynamic pressure of the water flow acts on the front end of the movable scoop 40. Therefore, it can be driven by the small hydraulic cylinder 20B.

[Brief description of drawings]

FIG. 1 is a side view of a composite support type super high speed ship using buoyancy and wing lift.

FIG. 2 is a rear view of the composite support type super high speed ship.

FIG. 3 is a side view of a main part of the composite support type ultra high speed ship.

FIG. 4 is a cross-sectional view of a water intake device of a water jet pump of the composite support type ultra-high speed ship.

5 is a sectional view taken along line 5-5 of FIG.

FIG. 6 is a perspective view of a movable flap and a hydraulic cylinder.

FIG. 7 is a cross-sectional view of a water intake structure of a water intake device according to a modification.

FIG. 8 is a cross-sectional view of a water intake structure of a water intake device according to another embodiment.

9 is a sectional view taken along line 9-9 of FIG.

FIG. 10 is a characteristic diagram of the total pressure of the water flow in and out of the water intake passage in the composite support type ultra high speed ship.

[Explanation of symbols]

 1 Composite support type super high speed ship 2 Upper hull 3 Lower hull 5 Strut members 6A, 7A Wing 8 Water jet pump 9 Water intake device 15 Water intake 15a Rear edge 15b Front edge 17 Water intake passage 18, 18A Movable flap 20, 20A, 20B Hydraulic cylinder 21, 31 Free rotor 23 Bottom wall part 24 Side wall part 25 Pivot pin 40 Movable scoop 43 Guide groove

Claims (5)

[Scope of utility model registration request] 1. An upper hull and a lower hull for generating buoyancy,
In a super-high-speed ship of combined support type with buoyancy and wing lift, which comprises a strut member connecting the upper hull and the lower hull, a wing for generating lift, and a water jet pump for propulsion, the outer surface of the lower hull is Providing a flush-type water intake that faces, a water intake passage that is connected to the water intake and extends through the lower hull and strut members to the water jet,
A movable flap for introducing a water flow, which is movable at a projecting position that partially projects outside the outer surface of the lower hull and a retracted position that retreats into the outer surface of the lower hull, at the rear edge of the water intake port. A water jet pump for a water jet pump of a composite support type ultra-high speed ship by means of buoyancy and wing lift, characterized in that a member is provided and drive means for switching the position of the movable flap member is provided. 2. The movable flap member includes a bottom wall portion and a pair of side wall portions provided upright on both ends thereof, and a rear end portion of the movable flap member is rotatably supported by a pin member. The water intake device for a water jet pump of a composite support type ultra-high speed ship according to claim 1, wherein the buoyancy and wing lift forces are applied. 3. A water jet pump for a composite support type ultra-high speed ship according to claim 2, wherein a rotor for preventing separation of water flow is provided at a front edge portion of the water intake port. Water intake device. 4. A composite support type ultra-high-speed ship according to claim 3, wherein a rotor for preventing separation of water flow is provided at a tip end portion of a bottom wall portion of the movable flap member. Water intake device for water jet pump. 5. An upper hull and a lower hull for generating buoyancy,
In a super-high-speed ship of combined support type with buoyancy and wing lift, which comprises a strut member connecting the upper hull and the lower hull, a wing for generating lift, and a water jet pump for propulsion, the outer surface of the lower hull is Providing a slash-type intake that faces, providing an intake passage that is connected to the intake and extends through the lower hull and strut members to the water jet,
At the rear edge of the water intake port, a protruding position that partially protrudes out of the outer surface of the lower hull consisting of a bottom wall part and a pair of side wall parts at both ends thereof, and a retreat that retreats into the outer surface of the lower hull. Provided with a movable scoop member for water flow introduction that is movable across the entry position,
A composite support type super high speed ship by buoyancy / wing lift force, wherein the movable scoop member is slidably mounted in a guide groove of an inner surface of a water passage, and drive means for switching the position of the movable scoop member is provided. Water jet pump water intake device.