JP2021049874A - Turbine for generation of propulsion force - Google Patents

Abstract

To provide a turbine for generation of propulsion force usable as a generation source for propulsion force in a deep-sea explorer or a vessel and capable of facilitating saving energy.SOLUTION: A turbine for generation of propulsion force comprises: a turbine shaft reduced in diameter as proceeding from one end to the other end: and a plurality of turbine blades formed on a surface of the turbine shaft and extending spirally from one end to the other end of the turbine shaft, and defining a fluid channel between mutually adjacent turbine blades. The fluid channel comprises: a fluid inlet for conducting a fluid at one end of the turbine shaft; and a fluid outlet for ejecting the fluid in an axial direction of the turbine shaft at the other end of the turbine shaft. The fluid channel is reduced in channel area linearly as going along a flowing direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to a turbine for generating propulsive force.

Development of an unmanned seafloor probe is underway for exploration of metal and mineral resources under the seafloor and creation of seafloor maps. Since such a seafloor probe is required to search the seafloor for a long period of time, it is desired to develop a propulsion device that saves energy as much as possible as a propulsion device for moving in the sea.

The present invention has been made to solve such a demand, and provides a propulsion force generating turbine that can be used as a propulsion force generating source for a propulsion device such as a seabed probe or a ship and can save energy. The purpose is to do.

The object of the present invention is to form a turbine shaft portion whose diameter is reduced from one end to the other end and a surface of the turbine shaft portion, and spirally extend from one end to the other end of the turbine shaft portion. A plurality of turbine blades are provided, and a fluid flow path is defined between turbine blades adjacent to each other, and the fluid flow path is a flow path inlet for guiding a fluid at one end of the turbine shaft portion. And at the other end of the turbine shaft portion, the fluid outlet is provided to eject the fluid in the axial direction of the turbine shaft portion, and the flow path area of the fluid flow path linearly decreases along the flow direction. It is achieved by a turbine for propulsion generation, which is characterized in that.

Further, in the above-mentioned turbine for generating propulsive force, it is preferable that the height of each turbine blade from the surface of the turbine shaft portion increases along the flow direction of the fluid flow path.

Further, the ratio (HT / HL) of the turbine blade height HL from the turbine shaft surface at the flow path inlet to the turbine blade height HT from the turbine shaft surface at the flow path outlet is determined. It is preferably 1.5 to 2.3.

Further, the ratio (ST / SL) of the flow path area SL of the fluid flow path at the flow path inlet to the flow path area ST of the fluid flow path at the flow path outlet is 0.4 to 0.85. It is preferably in the numerical range.

Further, it is preferable that the flow path inlet of the fluid flow path guides the fluid at one end of the turbine shaft portion in a direction perpendicular to the axial direction of the turbine shaft portion.

According to the present invention, it is possible to provide a propulsion force generating turbine that can be used as a propulsion force generating source for a propulsion device such as a seabed probe or a ship and can save energy.

It is a schematic configuration perspective view of the turbine for generating propulsion force which concerns on this invention. It is a schematic configuration side view of the turbine for propulsion generation which concerns on this invention. It is a schematic block diagram of the turbine shaft part included in the turbine for generating propulsion force which concerns on this invention. It is a schematic block front view of the turbine for propulsion generation which concerns on this invention. It is explanatory drawing of the fluid flow path area about the fluid flow path in the propulsion force generation turbine which concerns on this invention. FIG. 3 is a schematic configuration perspective view showing a modified example of the propulsion force generating turbine shown in FIG. 1. It is a schematic block diagram of the propulsion apparatus provided with the turbine for generating propulsion force which concerns on this invention.

Hereinafter, the propulsive force generating turbine 1 according to the present invention will be described with reference to the accompanying drawings. Each figure is partially enlarged or reduced to facilitate understanding of the configuration. FIG. 1 is a schematic configuration perspective view of the propulsion force generating turbine 1 according to the present invention, and FIG. 2 is a schematic configuration side view thereof. The propulsion generating turbine 1 according to the present invention is propelled by rotating it with a driving device such as a motor to introduce a fluid such as seawater from one end side and eject the fluid from the other end side. It propels a submarine probe or a ship equipped with a force generating turbine 1. As shown in FIGS. 1 and 2, the propulsion generating turbine 1 includes a turbine shaft portion 2 and a plurality of cork bottle opener type turbine blades 3 provided on the surface of the turbine shaft portion 2. .. The material for forming the propulsive force generating turbine 1 is not particularly limited as long as it is a metal material, but it is preferably formed of stainless steel or an aluminum alloy from the viewpoint of strength and durability. Further, the method for manufacturing the turbine 1 for generating propulsive force is not particularly limited, and examples thereof include an integral machining by cutting and a method of welding the turbine blades 3 to the turbine shaft 2. ..

As shown in the schematic cross-sectional view of FIG. 3, the turbine shaft portion 2 has a form in which the diameter is reduced from one end to the other end. The contour of the turbine shaft portion 2 of the region 21 in which the turbine blade 3 is provided is configured to form arcuate and parabolic curves in a cross-sectional view along the axis Z of the turbine shaft portion 2.

The cork bottle opener type turbine blade 3 is formed on the surface of the turbine shaft portion 2 as described above, and spirals from one end to the other end of the turbine shaft portion 2 as shown in FIGS. 1 and 2. It is configured to extend like a shape. In this embodiment, it is configured to include three spiral turbine blades 3. That is, the turbine blade 3 is provided on the surface of the turbine shaft portion 2 in the form of a triple helix. Further, a fluid flow path is defined between the turbine blades 3 adjacent to each other. Each of the three defined fluid channels also constitutes a spiral channel. This fluid flow path is provided with a flow path inlet for introducing the fluid at one end of the turbine shaft portion 2, and also has a fluid outlet for ejecting the fluid in the axial direction of the turbine shaft portion 2 at the other end of the turbine shaft portion 2. are doing. The reaction of the high-pressure fluid (jet) ejected from the fluid outlet can be utilized as a propulsive force, and a submarine probe or a ship equipped with a propulsive force generating turbine 1 can be propelled.

Each turbine blade 3 has substantially the same configuration, but as shown in the front view of FIG. 4 (viewed from the direction of arrow A in FIG. 2), the front edge LE of each of the three turbine blades 3 is They are arranged on the turbine shaft 2 at a distance of 120 °. The front edge LE of each turbine blade 3 is located at the maximum diameter portion of the turbine shaft portion 2 (one end portion of the turbine shaft portion 2). Further, the trailing edge TEs of each of the three turbine blades 3 are also arranged on the turbine shaft portion 2 at a distance of 120 °. The trailing edge TE of each turbine blade 3 is located at the minimum diameter portion at the other end of the turbine shaft portion 2. Further, a fluid (seawater or the like) flows into the fluid flow path from the front edge region of the turbine blade 3, and the fluid (seawater or the like) is discharged from the trailing edge region of the turbine blade 3.

The total winding angle of each turbine blade 3 around the axis of the turbine shaft portion 2 is shown in the front view of FIG. The total winding angle of each turbine blade 3 is defined as the frequency extending from the front edge LE of each turbine blade 3 to the trailing edge TE along the circumference, and the total winding angle is defined as the turbine blade 3 (3a) in FIG. On the other hand, A1 and turbine blade 3 (3b) are indicated as A2, and turbine blade 3 (3c) is indicated as A3. Examples of the total winding angles A1, A2, and A3 of each turbine blade 3 include a range of 90 ° to 360 °. Further, as a more preferable numerical range of the total winding angles A1, A2, A3 of each turbine blade 3, a range of 120 ° to 270 ° can be mentioned. In the present embodiment, the total winding angles A1, A2, and A3 of each turbine blade 3 are set to 180 °.

Further, as shown in FIG. 2, the front edge LE of the turbine blade 3 is formed so as to be parallel to the axis Z of the turbine shaft portion 2, and the trailing edge TE of the turbine blade 3 is the turbine shaft portion 2. It is formed so as to be perpendicular to the axis Z. In other words, each of the spiral turbine blades 3 is configured to gradually transition from the vertical front edge LE to the horizontal trailing edge TE when the turbine blades 3 are viewed from above to below in FIG. Has been done. Since the turbine blades 3 have such a shape, the fluid is directed in a direction perpendicular to the axis Z (rotational axis) of the turbine shaft portion 2 with respect to the fluid flow path defined by each turbine blade 3. The inlet can introduce a fluid (seawater or the like), and the fluid (seawater or the like) can be ejected in the direction of the axis (rotational axis) of the turbine shaft portion 2.

Further, in the present invention, the height of each turbine blade 3 from the surface of the turbine shaft portion 2 is configured to increase along the flow direction of the fluid flow path. That is, the height of each turbine blade 3 from the surface of the turbine shaft portion 2 is configured to gradually increase from the flow path inlet to the flow path outlet of the fluid flow path. The height of the turbine blade 3 means a dimension in the direction perpendicular to the surface of the turbine shaft portion 2.

Further, as shown in the explanatory diagram of the fluid flow path area shown in FIG. 5, the flow path area of the fluid flow path defined by the turbine blades 3 having the above configuration linearly decreases along the flow direction. It is configured as follows. That is, the flow path area of the fluid flow path is configured to gradually decrease at a substantially constant rate from the flow path inlet to the flow path outlet. With such a configuration, the fluid (seawater or the like) flowing from the flow path inlet to the flow path outlet is compressed and its speed increases toward the downstream side in the flow direction. Here, the flow path area of the fluid flow path means the area of the flow path in a plane perpendicular to the flow direction of the fluid. In FIG. 5, the vertical axis represents the area of the fluid flow path, the horizontal axis represents the distance along the fluid flow direction, and the change in the flow path area of the fluid flow path when viewed along the fluid flow direction. It is a graph showing.

As described above, the propulsion force generating turbine 1 according to the present invention is configured such that the fluid flow path defined between the turbine blades linearly decreases in the flow direction along the flow direction. Therefore, the fluid (seawater, etc.) that is introduced into one end of the turbine shaft 2 and ejected from the other end by rotating by a driving device such as a motor smoothly flows in each fluid flow path. It becomes possible. As a result, it is possible to reduce the amount of electric power supplied to a drive device such as a motor in order to rotate the propulsion force generating turbine 1, and it is possible to propel a submarine probe, a ship, etc. with energy saving. Become.

Further, as shown in FIG. 1, the turbine blade 3 has a shape spiraling from the front edge LE to the trailing edge TE around the axis Z of the turbine shaft portion 2. Each turbine blade (3a, 3b, 3c) has a convex side surface 31 and a concave side surface 32, respectively. Here, when the propulsion force generating turbine 1 is rotated in the direction of the arrow B shown in FIGS. 1 and 4 by a driving device such as a motor (rotated counterclockwise in FIG. 4), each fluid is rotated. Due to the action of a fluid (seawater or the like) flowing through the flow path from one end side to the other end side of the turbine shaft portion 2, the convex side surface 31 of each turbine blade 3 becomes the high pressure side of the turbine blade 3, and each turbine blade 3 The concave side surface 32 of the above is the low pressure side of the turbine blade 3. Since the convex side surface 31 of the turbine blades 3 can be configured as the high pressure side and the concave side surface 32 of each turbine blade 3 can be configured as the low pressure side, the propulsive force generating turbine 1 is shown in FIGS. 1 and 4. A force (a force based on the lift generated in each turbine blade 3) is generated to assist the rotation in the direction of the arrow B. As a result, the amount of electric power supplied to the drive device such as a motor for rotating the propulsion force generating turbine 1 can be further reduced, and the submarine probe, the ship, etc. can be propelled with more energy saving. Is possible.

Further, since the height of the turbine blade 3 from the surface of the turbine shaft portion 2 is configured to increase along the flow direction of the fluid flow path, the fluid flow in which the flow velocity of the fluid (water) increases is particularly high. On the downstream side of the road, an extremely high pressure difference can be generated between the convex side surface 31 (high pressure side) of each turbine blade 3 and the concave side surface 32 (low pressure side) of each turbine blade 3. It will be possible. As a result, the lift acting on each turbine blade 3 increases, and a large force is generated for the propulsion generating turbine 1 to assist the rotation in the direction of arrow B in FIGS. 1 and 4, and the motor The amount of electric power supplied to the drive device such as the above can be further reduced, and energy can be saved.

Here, with reference to FIG. 2, with respect to the height of each turbine blade 3 from the surface of the turbine shaft portion 2, the height HL of the turbine blade 3 from the surface of the turbine shaft portion 2 at the flow path inlet and the flow path. It is preferable that the ratio (HT / HL) of the height HT of the turbine blade 3 from the surface of the turbine shaft portion 2 at the outlet is in the numerical range of 1.5 to 2.5. Further, it is more preferable to configure the numerical range to be in the numerical range of 1.7 to 2.2. The height HL of the turbine blade 3 corresponds to the height of the front edge LE of the turbine blade 3, and the height HT of the turbine blade 3 corresponds to the height of the trailing edge TE of the turbine blade 3. In this way, by configuring the ratio (HT / HL) value to be in the numerical range of 1.5 to 2.5, it is further guided to one end of the turbine shaft portion 2 and the other end. The fluid (seawater, etc.) ejected from the turbine can smoothly circulate in each fluid flow path.

Further, regarding the fluid flow path defined by the turbine blades 3, both the flow path area SL at the flow path inlet and the flow path area ST at the flow path outlet shown in the explanatory view of the fluid flow path area shown in FIG. The ratio (ST / SL) of is preferably configured to be in the numerical range of 0.4 to 0.9. Further, it is more preferable to configure it so that it has a numerical range of 0.5 to 0.8. By setting the ratio (ST / SL) value so that it is within such a numerical range, it becomes possible for fluids such as seawater to flow smoothly in each fluid flow path, and the turbine for propulsion generation. The amount of electric power supplied to a driving device such as a motor for driving 1 can be further reduced, and energy saving can be achieved.

Regarding the propulsive force generating turbine 1 according to the present invention, the configuration including three turbine blades 3 has been described above, but the configuration is not particularly limited to such a configuration, and the configuration is configured to include two turbine blades 3. Alternatively, it may be configured to include four or more turbine blades 3.

Here, as shown in FIG. 6, a protrusion 22 extending along the axial direction of the turbine shaft 2 may be provided at the other end of the turbine shaft 2 of the propulsion generating turbine 1. By providing such a protrusion 22, the rectifying effect of the fluid (seawater or the like) ejected from the propulsion generating turbine 1 can be enhanced, and a motor or the like is driven to rotate the propulsion generating turbine 1. It is expected that the amount of power supplied to the device will be even smaller.

Next, an example of the propulsion device 10 including the propulsion force generating turbine 1 having the above configuration will be described. As shown in the schematic schematic configuration diagram of FIG. 7, the propulsion device 10 includes an upper casing 6, a lower casing 7, a propulsion force generating turbine 1, and a drive device 8 such as a motor. Since the propulsion force generating turbine 1 has the above-mentioned structure, detailed description of the structure will be omitted below.

The upper casing 6 is a member having a central opening and having a bottomed tubular shape. The peripheral wall of the upper casing is configured so that its inner surface is separated from the propulsion generating turbine 1 arranged at the central opening by a predetermined dimension.

The lower casing 7 is arranged below the upper casing 6 and includes a tubular portion 71 having an inner peripheral surface whose diameter gradually decreases from the upper side to the lower side. Further, the tubular portion 71 of the lower casing 7 whose diameter gradually decreases from the upper side to the lower side forms a slight gap with the edge of the turbine blade 3 on the erection direction side of the propulsion force generating turbine 1. It is configured to do. It is preferable that this gap is configured to be as small as possible.

The propulsive force generating turbine 1 is rotatably arranged inside the central opening of the upper casing 6 and the tubular portion 71 of the lower casing 7.

The drive device 8 such as a motor is arranged above the upper casing 6. The drive device 8 is connected to the propulsion force generating turbine 1 via a transmission shaft 9, and is configured so that the propulsion force generating turbine 1 can be rotated by the rotation of the drive device 8.

By rotating the propulsion generating turbine 1 by the action of the drive device 8, the fluid such as seawater existing inside the peripheral wall of the upper casing flows into the upper casing 6 perpendicular to the rotation axis of the propulsion generating turbine 1. It flows into the fluid inlet of the fluid flow path along the bottom surface of the turbine, is pressurized when flowing through each fluid flow path, and is ejected from the fluid outlet on the other end side of the turbine shaft portion 2. The ejection direction of the ejected fluid is a direction along the axial direction of the turbine shaft portion 2, and due to the reaction of the high-pressure fluid (jet) ejected from this fluid outlet, the direction opposite to the ejection direction of the fluid Submarine probes and ships equipped with the propulsion force generating turbine 1 will be propelled. Here, the wake of the propulsion device 10 formed by the fluid ejected from the fluid outlet is a more linear flow (linear) than the wake of a so-called propeller generally used as a propulsive force generating means. Flow). As a result, the propulsion device equipped with the propulsion force generating turbine 1 according to the present invention exhibits higher propulsion performance than the propulsion device equipped with the propeller. Further, for example, when a seabed probe is navigating near the seabed, it is possible to effectively suppress the occurrence of a situation in which mud on the seabed is rolled up by a wake.

1 Turbine for propulsion generation 2 Turbine shaft 3 Turbine blade 6 Upper casing 7 Lower casing 71 Cylindrical part 8 Drive device 10 Propulsion device LE Turbine blade front edge TE Turbine blade trailing edge

Claims (5)

A turbine shaft that reduces in diameter from one end to the other,
It is provided with a plurality of turbine blades formed on the surface of the turbine shaft portion and spirally extending from one end to the other end of the turbine shaft portion.
A fluid flow path is defined between turbine blades adjacent to each other.
The fluid flow path has a flow path inlet for introducing the fluid at one end of the turbine shaft portion and a fluid outlet for ejecting the fluid in the axial direction of the turbine shaft portion at the other end of the turbine shaft portion.
The fluid flow path is a turbine for generating propulsive force, characterized in that the flow path area linearly decreases along the flow direction. The propulsion force generating turbine according to claim 1, wherein the height of each turbine blade from the surface of the turbine shaft portion increases along the flow direction of the fluid flow path. The ratio (HT / HL) of the turbine blade height HL from the turbine shaft surface at the flow path inlet to the turbine blade height HT from the turbine shaft surface at the flow path outlet is 1. The propulsive force generating turbine according to claim 2, wherein the turbine is 5 to 2.5. The ratio (ST / SL) of the flow path area SL of the fluid flow path at the flow path inlet to the flow path area ST of the fluid flow path at the flow path outlet is 0.4 to 0.85. The propulsive force generating turbine according to any one of claims 1 to 3. Claims 1 to 4, wherein the flow path inlet of the fluid flow path guides the fluid at one end of the turbine shaft portion in a direction perpendicular to the axial direction of the turbine shaft portion. The turbine for propulsion generation described in either.

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