Flow equalizing guide pipe for water flow pressurizing guide device

Abstract

The utility model relates to a flow-equalizing guide pipe for a water flow pressurizing guide device, the flow-equalizing guide pipe is arc-shaped on the whole and is used for being fixed on the upper side in front of a propeller, and the inner diameter of the flow-equalizing guide pipe is gradually reduced from one side far away from the propeller to one side close to the propeller; the flow equalizing guide pipe is provided with a wing-shaped section, and the outer side wall of the flow equalizing guide pipe is a plane. The top of the outer side wall of the flow-equalizing guide pipe is provided with an installation part protruding out of the surface of the flow-equalizing guide pipe, the installation part is arranged in the width direction of the outer side wall, the lower side of the installation part is connected with the outer side wall of the flow-equalizing guide pipe, the upper side of the installation part is provided with an installation groove used for fixing the fins, and installation holes are machined in the two side walls of the installation groove so that the fins can be fixed to the flow-equalizing guide pipe through fasteners. The installation part can adapt to installation of different fins, installation of the water flow pressurization guiding device on different types of ship bodies is facilitated, conduction of vibration between the flow equalizing guiding pipe and the fins is also facilitated to be relieved or filtered through the arrangement of the damping gaskets, and the service life of the water flow pressurization guiding device is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of ships, and in particular relates to a flow-averaging guide pipe used in a water flow pressurization guide device. Background Art

[0002] With the problems of energy shortage, environmental pollution, greenhouse effect and so on in recent years, green ship design has gradually attracted the attention of relevant personnel in the industry as a new trend. For a long time, the shipping industry has been an important industry that consumes energy, and it has also caused a series of environmental problems such as the greenhouse effect. At present, new design ships with excessive EEDI index will not be able to pass the review of classification societies or IMO, and operating ships with excessive EEDI index may be forced to scrap or unable to enter the international shipping market. Therefore, energy conservation and emission reduction of ships has become an issue that needs to be paid great attention. The effect of ship hydrodynamic energy-saving devices is significant and has an important influence on the research of ship energy-saving technology. Among them, setting a corresponding fluid intervention device at the propeller to increase the propeller efficiency is a new direction in the research of ship energy-saving technology.

[0003] For example, a Chinese patent with application number 201711253562.7 and titled "A Ship-use Guide Plate Type Annular Duct" discloses a ship hydrodynamic energy-saving device installed above and in front of the water flow outlet of the stern shaft of the hull, including a port side guide pipe, a starboard side guide pipe, a port side guide plate, a starboard side guide plate and an intermediate reinforcement structure; the port and starboard side guide pipes are installed on both sides of the stern of the hull above and in front of the water flow outlet of the stern shaft of the ship, the lower end of the guide pipe is directly connected to the hull, and the upper end is connected to the guide plate and the intermediate reinforcement structure, and the guide plate and the intermediate reinforcement structure are connected to the hull.

[0004] In order to further enhance propeller thrust by improving the wake field of the ship, our company has designed a water flow pressurization guide device. During the installation, it was found that since most components are welded, it is sometimes difficult for the fins to be installed snugly at the stern of the hull when dealing with different types of ships. Therefore, the flow equalization guide tube connected to the fins can be improved. Utility Model Content

[0005] The utility model aims to provide a flow balancing guide pipe for a water flow pressurizing guide device, which is convenient for installing and replacing fins and for modifying a hull.

[0006] In order to solve the above technical problems, the utility model discloses a flow balancing guide tube for a water flow pressurization guide device, wherein the water flow pressurization guide device is used to be arranged in front of a propeller at the stern of a ship to pre-treat the water flow to increase the propeller efficiency, and comprises a flow balancing guide tube, a fin arranged at the top of the flow balancing guide tube, and a plurality of blades fixed on the inner side of the flow balancing guide tube; the flow balancing guide tube is in an arc shape as a whole and is used to be fixed on the upper side in front of the propeller, and the inner diameter of the flow balancing guide tube gradually decreases from the side away from the propeller to the side close to the propeller ... The side of the guide tube away from the propeller is a water inlet, and the other side is a water outlet, and the diameter of the water inlet is larger than the diameter of the water outlet; the flow balancing guide tube has an airfoil section, and the outer side wall of the flow balancing guide tube is a plane; a mounting portion protruding from the surface of the flow balancing guide tube is provided on the top of the outer side wall of the flow balancing guide tube, and the mounting portion is arranged along the width direction of the outer side wall, the lower side of the mounting portion is connected to the outer side wall of the flow balancing guide tube, and the upper side is provided with a mounting groove for fixing fins, and mounting holes are processed on the two side walls of the mounting groove, so that the fins are fixed to the flow balancing guide tube through fasteners.

[0007] Preferably, the mounting portion is composed of a pair of L-shaped plates whose bottoms are not connected, or the mounting portion is composed of a pair of L-shaped plates whose bottoms are connected.

[0008] Preferably, the bottom of the L-shaped plate is welded to the flow equalizing guide pipe or connected with a fastener.

[0009] Preferably, a shock-absorbing gasket is provided in the mounting groove.

[0010] Preferably, the central angle corresponding to the flow balancing guide tube is 160°-180°.

[0011] Preferably, the length of the mounting portion is not greater than the width of the outer side wall of the flow balancing guide tube.

[0012] Preferably, the water inlet diameter is 0.8 to 1.5 times the propeller diameter, and the water outlet diameter is 0.6 to 1.1 times the propeller diameter.

[0013] Preferably, an outer wall of the flow balancing guide tube has an angle of 0° to 30° with the propeller axis.

[0014] Preferably, the flow-balancing guide tube is a hollow plate, which is composed of an inner tube plate, an outer tube plate and a supporting frame arranged between the inner tube plate and the outer tube plate.

[0015] The utility model discloses a flow-balancing guide tube for a water flow pressurizing guide device, and its mounting portion can adapt to the mounting of different fins, which is beneficial to the mounting of the water flow pressurizing guide device on hulls of different types. During the mounting, the water flow pressurizing guide device without fins is first mounted on the propeller shaft sleeve, and then suitable fins are selected for mounting, which can better adapt to the modification of hulls of different types. At the same time, the provision of the shock-absorbing gasket is also beneficial to reducing or filtering the conduction of vibration between the flow-balancing guide tube and the fins, thereby extending the service life of the water flow pressurizing guide device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a structural schematic diagram of a flow equalizing guide tube used in a water flow pressurizing guide device.

[0017] Figure 2 for Figure 1 A front view of a flow equalizing guide tube for a water flow pressurizing guide device.

[0018] Figure 3 for Figure 2 Left view of the flow equalizing guide pipe used in the water flow pressurization guide device.

[0019] Figure 4 It is a schematic diagram of the structure of another installation part.

[0020] The numbers in the figure are: 1-flow balancing guide tube, 101-tube inner plate, 102-tube outer plate, 103-water flow inlet, 104-water flow outlet, 2-airfoil section, 3-outer side wall of flow balancing guide tube, 4-installation part, 401-L-type plate, 5-installation groove, 6-installation hole, 7-shock-absorbing gasket. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below through embodiments so that those skilled in the art can implement the invention with reference to the description.

[0022] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0023] like Figure 1-3As shown, a flow balancing guide tube for a water flow pressurization guide device, the water flow pressurization guide device is used to be arranged in front of the propeller at the stern of the ship to pre-treat the water flow to increase the propeller efficiency, including a flow balancing guide tube 1, a fin arranged on the top of the flow guide tube, and a plurality of blades fixed on the inner side of the flow balancing guide tube 1; the flow balancing guide tube 1 is arc-shaped as a whole, and the central angle corresponding to the arc-shaped flow balancing guide tube 1 is 160°-180°. Used to be fixed on the upper side in front of the propeller, the inner diameter of the flow equalizing guide tube 1 gradually decreases from the side away from the propeller to the side close to the propeller; the side of the flow equalizing guide tube 1 away from the propeller is a water flow inlet 103, and the other side is a water flow outlet 104, and the diameter of the water flow inlet is larger than the diameter of the water flow outlet; the flow equalizing guide tube 1 has an airfoil section 2, and the outer side wall 3 of the flow equalizing guide tube is a plane. When the water flows through the flow equalizing guide tube 1, it is pressurized and accelerated, so that the propeller generates additional thrust; the top of the outer side wall 3 of the flow equalizing guide tube is provided with a mounting portion 4 protruding from the surface of the flow equalizing guide tube 1, and the mounting portion 4 is arranged along the width direction of the outer side wall, the lower side of the mounting portion 4 is connected to the outer side wall 3 of the flow equalizing guide tube, and the upper side is provided with a mounting groove 5 for fixing the fin, and mounting holes 6 are processed on the two side walls of the mounting groove 5, so that the fin is fixed to the flow equalizing guide tube 1 by fasteners.

[0024] The mounting portion 4 is composed of a pair of L-shaped plates 401 that are not connected at the bottom (such as Figure 3 ), or the mounting portion 4 is composed of a pair of L-shaped plates connected at the bottom (such as Figure 4 ).

[0025] The bottom of the L-shaped plate is welded to the flow-balancing guide pipe 1 or connected via fasteners, such as rivets and bolts.

[0026] The mounting groove 5 is provided with a shock-absorbing gasket 7 to reduce the vibration generated by the propeller and the water flow pressure guide device when the boat is running. Figure 4 As shown, the shock-absorbing gasket 7 is arranged on the two side walls of the installation groove 5 or a U-shaped shock-absorbing gasket is used to wrap the lower part of the fin to achieve the effect of shock absorption and blocking vibration transmission.

[0027] The length of the mounting portion 4 is not greater than the width of the outer side wall 3 of the flow balancing guide tube. In addition, the overall thickness of the mounting portion 4 should not be too large, so as not to significantly affect the flow guiding effect of the fins.

[0028] The water inlet diameter is 0.8 to 1.5 times the propeller diameter, and the water outlet diameter is 0.6 to 1.1 times the propeller diameter.

[0029] The outer wall of the flow balancing guide tube 1 has an angle of 0° to 30° with the propeller axis.

[0030] like Figure 1As shown, the flow-balancing guide tube 1 is a hollow plate, which is composed of an inner tube plate 101, an outer tube plate 102 and a supporting frame arranged between the inner tube plate and the outer tube plate, so as to reduce the processing cost of the flow-balancing guide tube 1.

[0031] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation scheme. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the embodiments shown and described herein.

Claims

1. A flow balancing guide tube for a water flow pressurization guide device, the water flow pressurization guide device is used to be arranged before the propeller at the stern of a ship to pre-treat the water flow to increase the propeller efficiency, comprising a flow balancing guide tube, a fin arranged at the top of the flow balancing guide tube, and a plurality of blades fixed on the inner side of the flow balancing guide tube; characterized in that: The flow balancing guide tube is arc-shaped as a whole and is used to be fixed on the upper side in front of the propeller. The inner diameter of the flow balancing guide tube gradually decreases from the side away from the propeller to the side close to the propeller. The side of the flow balancing guide tube away from the propeller is a water inlet, and the other side is a water outlet, and the diameter of the water inlet is larger than the diameter of the water outlet. The flow balancing guide tube has an airfoil cross-section, and the outer side wall of the flow balancing guide tube is a plane. A mounting portion protruding from the surface of the flow balancing guide tube is provided on the top of the outer side wall of the flow balancing guide tube, and the mounting portion is arranged along the width direction of the outer side wall. The lower side of the mounting portion is connected to the outer side wall of the flow balancing guide tube, and the upper side is provided with a mounting groove for fixing the fins. Mounting holes are processed on the two side walls of the mounting groove so that the fins are fixed to the flow balancing guide tube by fasteners.

2. The flow equalizing guide pipe for the water flow pressurizing guide device according to claim 1, characterized in that: The mounting portion is composed of a pair of L-shaped plates whose bottoms are not connected, or the mounting portion is composed of a pair of L-shaped plates whose bottoms are connected.

3. The flow equalizing guide pipe for the water flow pressurizing guide device according to claim 2, characterized in that: The bottom of the L-shaped plate is welded to the flow-equalizing guide pipe or connected with it through a fastener.

4. The flow equalizing guide pipe for the water flow pressurization guide device according to claim 1, characterized in that: A shock-absorbing gasket is arranged in the installation groove.

5. The flow equalizing guide pipe for the water flow pressurizing guide device according to claim 1, characterized in that: The central angle corresponding to the flow-balancing guide tube is 160°-180°.

6. The flow equalizing guide pipe for the water flow pressurizing guide device according to claim 1, characterized in that: The length of the mounting portion is no greater than the width of the outer side wall of the flow balancing guide tube.

7. The flow equalizing guide pipe for the water flow pressurizing guide device according to claim 1, characterized in that: The water inlet diameter is 0.8 to 1.5 times the propeller diameter, and the water outlet diameter is 0.6 to 1.1 times the propeller diameter.

8. The flow equalizing guide pipe for the water flow pressurizing guide device according to claim 1, characterized in that: The outer wall of the flow balancing guide tube has an angle of 0° to 30° with the propeller axis direction.

9. The flow equalizing guide pipe for a water flow pressurizing guide device according to claim 1, characterized in that: The flow-averaging guide tube is a hollow plate, which is composed of an inner tube plate, an outer tube plate and a supporting frame arranged between the inner tube plate and the outer tube plate.

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