Ship rectification pre-rotation guide wheel device

Abstract

The utility model discloses a ship rectification prerotation guide wheel device and a ship, and belongs to the field of ship energy conservation. The device comprises a guide pipe, guide vanes, rib plates and reinforcing ribs. The guide pipe is composed of a straight-pipe-shaped first guide pipe section and an arc-pipe-shaped second guide pipe section. The guide vane is arranged in the guide pipe and is composed of a plurality of vanes, and each vane is provided with a leading edge far away from the guide pipe and a trailing edge close to the guide pipe. The rib plates are attached to the inner circumferential face of the first section of guide pipe, and the reinforcing ribs are attached to the outer circumferential face of the second section of guide pipe. The propeller of the ship comprising the device is right opposite to the water outlet of the device. The device changes the water flow direction through the guide vanes, effectively reduces the inlet flow velocity of the propeller, prevents cavitation, and improves the propulsion efficiency by combining the rectification of the guide pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of shipbuilding energy saving, and concretely relates to a ship fairing pre-rotation guide wheel device. BACKGROUND

[0002] The ship propulsion system is one of three core components of the ship power system, in the ship propulsion process, the propeller converts the power delivered by the main engine into thrust, and acts on the water current through the propeller to generate the reaction force to make the ship move. However, due to the cavitation phenomenon of the propeller, a cavitation area is formed, when the ship speed reaches a certain value, the pressure in the cavitation area is lower than the air separation pressure, which causes the bubbles to collapse and release a large amount of energy, thereby damaging the propeller and affecting the propeller efficiency. At the same time, the noise generated by the propeller mainly comes from the propeller blade tip and the cavitation area, and with the increase of the speed, the noise generated by the propeller also gradually increases, thereby causing the propeller noise pollution to intensify.

[0003] The prior art discloses a propeller device with a pre-rotation guide wheel, the pre-rotation guide wheel is in a cylindrical shape, which can reduce the flow velocity at the inlet of the propeller, reduce the pressure pulsation and turbulence intensity at the inlet of the propeller, thereby improving the working environment of the propeller, improving the operation stability of the propeller, and reducing the cavitation degree and noise level of the propeller, but this structure cannot change the flow direction, and for large draft line type ships, the propeller performance cannot be effectively improved.

[0004] In summary, the existing pre-rotation guide wheel device can reduce the flow velocity at the inlet of the propeller, but cannot solve the cavitation problem of the propeller, and cannot effectively improve the performance of the propeller. SUMMARY

[0005] The technical problem to be solved by the utility model embodiment is to provide a ship fairing pre-rotation guide wheel device, which can effectively reduce the flow velocity at the inlet of the propeller, prevent cavitation of the propeller, and effectively improve the efficiency of the propeller. In order to solve the above problems, the utility model provides a fairing pre-rotation guide wheel device installed on the upstream of the stern propeller, comprising:

[0006] The guide pipe is composed of a first section guide pipe and a second section guide pipe, wherein the first section guide pipe is a semicircular pipe, and the second section guide pipe is an arc-shaped pipe;

[0007] The guide vane is arranged in the guide pipe, and the guide vane comprises a plurality of blades, each blade comprises a leading edge, a trailing edge, an upper surface and a lower surface, the leading edge is away from the guide pipe, the trailing edge is close to the guide pipe, and the upper surface is above the lower surface;

[0008] Rib plates are arranged on the inner circumferential surface of the first section of the conduit, and the rib plates are attached to the inner wall surface of the conduit and connected to the ship body.

[0009] Rib plates are arranged on the inner circumferential surface of the first section of the conduit, and the rib plates are attached to the inner wall surface of the conduit and connected to the ship body.

[0010] Further, the conduit further comprises a third section of conduit, one end of the third section of conduit is communicated with the first section of conduit, and the other end of the third section of conduit is communicated with the second section of conduit.

[0011] Further, the conduit further comprises a fourth section of conduit, one end of the fourth section of conduit is communicated with the first section of conduit, and the other end of the fourth section of conduit is communicated with the second section of conduit.

[0012] Further, the number of guide vanes is three, and the three guide vanes are uniformly distributed in the conduit.

[0013] Further, the number of guide vanes is four, and the four guide vanes are uniformly distributed in the conduit.

[0014] Further, the number of guide vanes is five, and the five guide vanes are uniformly distributed in the conduit.

[0015] Further, the number of guide vanes is six, and the six guide vanes are uniformly distributed in the conduit.

[0016] Further, the number of guide vanes is seven, and the seven guide vanes are uniformly distributed in the conduit.

[0017] Further, the number of guide vanes is eight, and the eight guide vanes are uniformly distributed in the conduit.

[0018] According to another aspect of the utility model, a kind of ship is provided, including propeller and above-mentioned rectification pre-rotation guide wheel device, the water outlet of the rectification pre-rotation guide wheel device is directly opposite the propeller.

[0019] The rectification pre-rotation guide wheel device provided by the utility model changes the direction of flow by guide vane, in combination with the additional thrust effect of conduit, so that the water flow in the conduit is fully mixed, the inlet flow velocity of propeller is greatly reduced, the cavitation of propeller is prevented, and the rectification effect is also achieved, so that the efficiency of propeller is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The rectification pre-rotation guide wheel provided by the utility model is installed in the view of the tail of ship body.

[0021] Figure 2 This is a front view of the propeller-front energy-saving structure provided in this utility model embodiment;

[0022] Figure 3 A side view of the propeller-front energy-saving structure provided in this utility model embodiment.

[0023] (Attached image labels: 01-guide vane, 02-duct, 03-reinforcing rib, 04-hull, 05-stiffening plate) Detailed Implementation

[0024] The present invention will be further described below with reference to embodiments, but is not limited to the contents of the specification.

[0025] like Figure 1 As shown, this utility model provides a flow-rectifying pre-swirl guide wheel device for ships, comprising: a guide tube 02, guide vanes 01, stiffeners 03, and reinforcing ribs 05. The guide tube 02 consists of a first section and a second section, wherein the first section is a straight pipe and the second section is an arc-shaped pipe. The guide vanes 01 are disposed within the guide tube 02 and include multiple blades, each blade comprising a leading edge, a trailing edge, an upper surface, and a lower surface. The leading edge is away from the guide tube 02, the trailing edge is close to the guide tube 02, and the upper surface is located above the lower surface. The stiffeners 03 are disposed on the inner circumferential surface of the first section of the guide tube 02, fitting against the inner wall of the guide tube 02 and simultaneously welded to the hull 04. The reinforcing ribs 05 are disposed on the outer circumferential surface of the second section of the guide tube 02, fitting against the outer wall of the guide tube 02 and simultaneously welded to the hull 04.

[0026] like Figure 2 and 3 As shown, the rectifying pre-swirl guide wheel device provided by this utility model utilizes guide vanes 01 to change the direction of the incoming flow. Combined with the function of the guide tube 02, this ensures thorough mixing of the water entering the guide tube 02, significantly reducing the incoming flow velocity at the propeller inlet, preventing propeller cavitation, and also achieving a rectifying effect, thereby effectively improving propeller efficiency. Specifically, the guide tube 02 also includes a third guide tube, one end of which is connected to the first guide tube, and the other end of which is connected to the second guide tube. This arrangement facilitates the processing and manufacturing of the guide tube 02.

[0027] Preferably, the conduit 02 further comprises a fourth conduit, one end of the fourth conduit is communicated with the first conduit, and the other end of the fourth conduit is communicated with the second conduit. In this way, the conduit 02 is convenient to manufacture. Optionally, the number of the guide vanes 01 is three, and the three guide vanes 01 are uniformly distributed in the conduit 02. Of course, other numbers of the guide vanes 01 can be adopted, for example, the number of the guide vanes 01 is four, and the four guide vanes 01 are uniformly distributed in the conduit 02. Alternatively, the number of the guide vanes 01 is five, and the five guide vanes 01 are uniformly distributed in the conduit 02. Alternatively, the number of the guide vanes 01 is six, and the six guide vanes 01 are uniformly distributed in the conduit 02. Alternatively, the number of the guide vanes 01 is seven, and the seven guide vanes 01 are uniformly distributed in the conduit 02. Alternatively, the number of the guide vanes 01 is eight, and the eight guide vanes 01 are uniformly distributed in the conduit 02.

[0028] The utility model further provides a kind of ship, including propeller and above-mentioned rectification pre-rotation guide wheel device, the water outlet of rectification pre-rotation guide wheel device is directly opposite propeller.

[0029] The rectification pre-rotation guide wheel device provided by the utility model changes the direction of incoming flow by guide vane 01, and combines the additional thrust of conduit 02, so that the water flow entering conduit 02 is fully mixed, the incoming flow speed at the inlet of propeller is greatly reduced, cavitation of propeller is prevented, and the rectification effect is also achieved, so that the efficiency of propeller is effectively improved. Obviously, the above-mentioned embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. All embodiments need not be exhausted here. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A ship flow straightening pre-swirl guide device, comprising: The conduit (02) is composed of a first conduit and a second conduit, wherein the first conduit is a straight pipe and the second conduit is an arc-shaped pipe; the guide vane (01) is arranged in the conduit (02) and comprises a plurality of blades, each blade comprising a leading edge, a trailing edge, an upper surface and a lower surface, wherein the leading edge is away from the conduit (02), the trailing edge is close to the conduit (02), and the upper surface is above the lower surface; the rib plate (03) is arranged on the inner circumferential surface of the first conduit of the conduit (02) and is attached to the inner wall surface of the conduit (02); and the reinforcing rib (05) is arranged on the outer circumferential surface of the second conduit of the conduit (02) and is attached to the outer wall surface of the conduit (02).

2. The rectifying pre-spinning guide wheel apparatus of claim 1, wherein, The conduit (02) further comprises a third conduit, one end of the third conduit being in communication with the first conduit and the other end of the third conduit being in communication with the second conduit.

3. The rectifying pre-spinning guide wheel apparatus of claim 1, wherein, The conduit (02) further comprises a fourth conduit, one end of the fourth conduit being in communication with the first conduit and the other end of the fourth conduit being in communication with the second conduit.

4. A pre-swirl guide device according to any one of claims 1 to 3, characterised in that The number of the guide vanes (01) is three, and the three guide vanes (01) are uniformly distributed in the conduit (02).

5. A pre-swirl guide device according to any one of claims 1 to 3, characterised in that The number of the guide vanes (01) is four, and the four guide vanes (01) are uniformly distributed in the conduit (02).

6. A rectifying pre-swirl guide device according to any one of claims 1-3, characterized in that The number of the guide vanes (01) is five, and the five guide vanes (01) are uniformly distributed in the conduit (02).

7. A rectifying pre-swirl guide device according to any one of claims 1-3, characterized in that The number of the guide vanes (01) is six, and the six guide vanes (01) are uniformly distributed in the conduit (02).

8. A rectifying pre-swirl guide device according to any one of claims 1-3, characterized in that The number of the guide vanes (01) is seven, and the seven guide vanes (01) are uniformly distributed in the conduit (02).

9. A rectifying pre-swirl guide device according to any one of claims 1-3, characterized in that The number of the guide vanes (01) is eight, and the eight guide vanes (01) are uniformly distributed in the conduit (02).

Images