Wake flow energy-saving optimization device for ship propeller

Abstract

The utility model relates to a wake flow energy-saving optimization device for a ship thruster in the field of ship engineering, which comprises a rectifying mechanism, a flow guide mechanism, a flow adjusting mechanism and a flow adjusting mechanism, the rectifying mechanism comprises a rectifying cover and rectifying plates, the rectifying cover is connected with the propeller body, and the rectifying plates are circumferentially mounted in the rectifying cover at equal intervals; by the adoption of the structure, wake flow can make contact with the narrow end with small stress firstly and then make contact with the wide end step by step, initial impact and overall impact force of water flow on the rectifying plate are effectively reduced, bending deformation damage caused by too large stress of the rectifying plate is avoided, the service life of the device is prolonged, meanwhile, the wake flow rectifying effect is improved, energy loss is reduced, and the service life of the device is prolonged. And wake flow energy-saving optimization of the ship propeller is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of wake energy-saving optimization devices for ship propeller, in particular to a kind of wake energy-saving optimization devices for ship propeller applied to ship engineering technical field. BACKGROUND

[0002] The wake of ship propeller refers to the accelerated water flow disturbed behind ship propeller when it works. When ship propeller (such as propeller) rotates, it will exert force on the surrounding water, making the water gain energy and flow. The existence of wake will affect the propulsion efficiency, maneuverability and stability of the ship. Excessive energy loss in the wake will reduce the fuel economy of the ship.

[0003] Chinese utility model patent CN202111443100.8 discloses a propeller turbocharging device, which comprises a ship body. A rudder drive rod is installed on the ship body. A rudder is fixedly installed at the lower end of the rudder drive rod. The ship body is also provided with a bracket and a propeller assembly. A fairing cover assembly is installed on the bracket. One side of the propeller assembly is located in the fairing cover assembly.

[0004] The above device uses a fairing cover and fairing blades to straighten the vortex wake generated by the rotation of the propeller. Although it achieves straightening of the wake to some extent, the width of the fairing blades is uniform. When the vortex water flow contacts the fairing blades, it will produce a large impact on the blades, which may cause the fairing blades to bend and even be damaged. This not only shortens the service life of the components and increases maintenance costs, but also may affect the straightening effect of the wake, leading to increased energy loss of the ship propeller. It cannot meet the demand of energy-efficient operation of the ship. Therefore, the utility model is proposed. SUMMARY

[0005] The technical problem to be solved by the utility model is how to improve the service life of the components while ensuring the straightening optimization effect of the wake.

[0006] To solve the above problems, the utility model provides a wake energy-saving optimization device for ship propeller, which comprises: a straightening mechanism installed on the propeller body near the propeller blade; the straightening mechanism comprises a fairing cover and a straightening plate; the fairing cover is connected with the propeller body; the straightening plate is installed in the fairing cover at equal intervals; the width of the straightening plate gradually increases from one side near the propeller body to the other side.

[0007] In the above-mentioned wake energy-saving optimization device for ship propeller, through the design of gradually changing width of the fairing plate, not only the effect of wake flow regulation can be ensured, but also the wake flow first contacts the narrow end with small force, and then gradually contacts the wide end, effectively reducing the initial impact and overall impact of water flow on the fairing plate.

[0008] As a further improvement of the present application, the fairing plate is provided with an arc-shaped portion at one end close to the central axis of the fairing cover, and a plurality of water outlet holes are equidistantly arranged at the upper end of the arc-shaped portion.

[0009] As a further improvement of the present application, the water outlet end of the water outlet hole faces the adjacent fairing plate.

[0010] As a further improvement of the present application, an arc-shaped chamfer is arranged at the corner of the fairing plate and the arc-shaped portion.

[0011] As a further improvement of the present application, the fairing cover is fixedly connected with a connecting plate at one side close to the propeller body, a connecting groove is arranged on the propeller body at one side close to the fairing cover, and the connecting plate is screwed in the connecting groove.

[0012] As a further improvement of the present application, the fairing plate and the fairing cover are detachably connected through the connecting piece.

[0013] As a further improvement of the present application, the connecting piece includes a connecting bolt, a plurality of insertion slots are equidistantly arranged on the inner wall of the fairing cover, the fairing plate is inserted in the insertion slot, a plurality of insertion holes are equidistantly arranged on the fairing cover at positions close to the insertion slots and used in cooperation with the connecting bolt, and a threaded hole is arranged on one side of the fairing plate in the insertion slot and used in cooperation with the connecting bolt.

[0014] Compared with the prior art, the wake energy-saving optimization device for ship propeller can make the wake flow first contact the narrow end with small force, and then gradually contact the wide end, effectively reducing the initial impact and overall impact of water flow on the fairing plate, avoiding the bending deformation and damage of the fairing plate due to excessive force, prolonging the service life of the device, improving the wake flow regulation effect, reducing energy loss, and realizing the wake energy-saving optimization of the ship propeller. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the three-dimensional structure of the embodiment of the present application;

[0016] Figure 2 is a schematic diagram of the unfolded structure of the propeller body and the fairing mechanism of the embodiment of the present application;

[0017] Figure 3 is a schematic diagram of the unfolded structure of the local structure of the fairing mechanism of the embodiment of the present application;

[0018] Figure 4 Figure 1 is a schematic view of the structure of the rectifier plate in the embodiment of the present application.

[0019] Figure legend:

[0020] 1, propeller body; 101, connecting groove; 2, rectifier mechanism; 201, fairing; 202, connecting plate; 203, insertion slot; 204, rectifier plate; 205, arc-shaped part; 206, water outlet hole; 207, arc-shaped chamfer; 208, connecting bolt. DETAILED DESCRIPTION

[0021] The embodiment of the present application will be described in detail below with reference to the accompanying drawings.

[0022] Embodiment:

[0023] Figures 1-4 As shown, an energy-saving optimization device for the wake of a ship propeller comprises: a rectifier mechanism 2 installed on the propeller body 1 near the propeller blade; the rectifier mechanism 2 comprises a fairing 201 and a rectifier plate 204, the fairing 201 is connected to the propeller body 1, and the rectifier plate 204 is installed in the fairing 201 at equal intervals; the width of the rectifier plate 204 gradually increases from one side near the propeller body 1 to the other side.

[0024] The fairing 201 is fixedly connected to a ring of connecting plates 202 on the side near the propeller body 1, and the propeller body 1 is provided with a connecting groove 101 on the side near the fairing 201, and the connecting plate 202 is screwed into the connecting groove 101.

[0025] The rectifier plate 204 is detachably connected to the fairing 201 by a connecting member, the connecting member comprises a connecting bolt 208, the inner wall of the fairing 201 is provided with a plurality of insertion slots 203 at equal intervals, the rectifier plate 204 is inserted into the insertion slot 203, the fairing 201 is provided with a plurality of insertion holes at equal intervals near the insertion slot 203, and the rectifier plate 204 is provided with a threaded hole on the side in the insertion slot 203.

[0026] When the device is used to optimize the energy saving of the wake generated by the ship propeller, first, on the propeller body 1 near the propeller blade, the ring of connecting plates 202 on the side of the fairing 201 near the propeller body 1 is used, the connecting plate 202 is aligned with the connecting groove 101 provided on the propeller body 1, and the connecting plate 202 is stably screwed into the connecting groove 101 by screwing, the connection between the fairing 201 and the propeller body 1 is completed, the connection is ensured to be tight, and water leakage is prevented.

[0027] The fairing plate 204 is sequentially inserted into the insertion slots 203 arranged at equal intervals in the inner wall of the fairing cover 201, and then the connecting bolts 208 are used to pass through the insertion holes formed in the fairing cover 201 near the insertion slots 203 and are screwed into the threaded holes formed in one side of the fairing plate 204 located in the insertion slot 203, so that the fairing plate 204 is firmly installed in the fairing cover 201 through the detachable connection mode.

[0028] When the ship propeller is started, the propeller rotates to generate a vortex wake, and the wake flows into the fairing cover 201. First, the wake contacts the part of the fairing plate 204 near the propeller body 1, which has a smaller width, so the force acting on it is small. Therefore, the wake can be initially decelerated while reducing the force acting on the fairing plate 204. As the wake flows in the fairing cover 201, the width of the fairing plate 204 contacted by the wake gradually increases. When the wake contacts the fairing plate 204 with a larger width at the rear, the vortex flow rate of the wake is reduced, and the impact force on the fairing plate 204 is gradually reduced. This not only realizes step-by-step pressure reduction and flow regulation of the vortex water flow, but also reduces the impact force on the fairing plate 204, greatly improving the service life of the fairing plate 204.

[0029] Compared with the prior art, through the design of the gradually changing width of the fairing plate 204, the wake first contacts the narrow end with small force and then gradually contacts the wide end, effectively reducing the initial impact and overall impact force of the water flow on the fairing plate 204, avoiding bending deformation and damage of the fairing plate 204 due to excessive force, prolonging the service life of the device, and improving the wake flow regulation effect while reducing energy loss, achieving energy-saving optimization of the ship propeller wake.

[0030] Figures 1-4 As shown, the fairing plate 204 is provided with an arc-shaped part 205 near the center axis of the fairing cover 201, and a plurality of water outlets 206 are formed at equal intervals at the upper end of the arc-shaped part 205. When the water flow flows through the arc-shaped part 205, it is guided upward by the arc-shaped structure, generating an upward force that can effectively offset part of the impact of the wake on the fairing plate 204. This is like adding a "buffer barrier" to the fairing plate 204, reducing the risk of bending, deformation, or even damage of the fairing plate 204 caused by the impact of the wake, and prolonging its service life.

[0031] The water outlet ports of the water outlets 206 face the adjacent fairing plates 204, and the water flow sprayed from the water outlets 206 impacts the adjacent fairing plates 204, which will exert a certain amount of reverse force on the adjacent fairing plates 204. This helps to balance the impact of the wake on the fairing plate 204, making the external force acting on the fairing plate 204 more uniform, reducing the risk of deformation and damage caused by uneven force, prolonging the service life of the fairing plate 204, and ensuring stable operation of the device.

[0032] The arc-shaped chamfer 207 is arranged at the corner of the rectifier plate 204 and the arc-shaped part 205, the traditional right-angled corner is easy to cause the separation of water flow when turning, to form local vortex and intensify energy loss, the arc-shaped chamfer 207 guides the tail flow to naturally turn through the smooth transition curved surface, avoids the water flow from suddenly separating from the surface of the rectifier plate 204 at the corner, effectively suppresses the generation of vortex, and reduces the degree of disorder of the tail flow; the arc-shaped chamfer 207 reduces the local mutation area of the water flow in contact with the rectifier plate 204, so that the water flow flows more closely to the surface when passing through the junction of the rectifier plate 204 and the arc-shaped part 205, reduces the resistance generated by impact, improves the flow efficiency of the tail flow in the fairing 201, and indirectly helps energy saving and optimization; the smooth transition of the water flow reduces the local stress concentration generated by the vortex impact, avoids fatigue damage or cracks at the junction of the arc-shaped part 205 and the rectifier plate 204 due to repeated stress, prolongs the service life of the rectifier plate 204, and ensures the long-term stable operation of the device.

[0033] In combination with the actual needs at present, the above-mentioned embodiments adopted by the present application are not limited to the protection scope, various changes made within the knowledge range of the skilled in the art without departing from the concept of the present application still fall within the protection scope of the present application.

Claims

1. A wake energy saving optimisation device for a marine propeller, characterised in that, The utility model relates to a kind of propeller, including: Rectifying mechanism (2), rectifying mechanism (2) is installed on propeller body (1) near the position of propeller blade; The rectifying mechanism (2) includes fairing (201) and fairing plate (204), the fairing (201) is connected with propeller body (1), and the fairing plate (204) is installed in the fairing (201) in circle equidistantly; The width of the fairing plate (204) gradually increases from one side close to propeller body (1) to the other side; The fairing (201) is fixedly connected with a set of connecting plate (202) close to one side of propeller body (1), and the propeller body (1) is provided with connecting groove (101) close to one side of fairing (201), and the connecting plate (202) is screwed in connecting groove (101) by thread.

2. A wake energy saving optimiser device for a marine propulsor according to claim 1, characterised in that, The fairing plate (204) is provided with arc part (205) close to one end of central axis of fairing (201), and the upper end of arc part (205) is provided with a plurality of water outlet holes (206) equidistantly.

3. A wake energy saving optimisation device for a marine propulsor according to claim 2, characterised in that, The water outlet port of the water outlet hole (206) faces the adjacent fairing plate (204), and the corner of the fairing plate (204) and arc part (205) is provided with arc chamfer (207).

4. A wake energy saving optimiser device for a marine propulsor according to claim 1, characterised in that, The fairing plate (204) and fairing (201) are detachably connected by connecting piece, and the connecting piece includes connecting bolt (208), and the fairing plate (204) and fairing (201) are connected by connecting bolt (208).

5. A wake energy saving optimiser device for a marine propulsor according to claim 4, characterised in that, The inner wall of the fairing (201) is provided with a plurality of insertion grooves (203) in circle equidistantly, the fairing plate (204) is inserted in insertion groove (203), and the fairing (201) is provided with a plurality of insertion holes close to insertion groove (203) equidistantly, which are used in cooperation with connecting bolt (208), and the side of the fairing plate (204) in insertion groove (203) is provided with threaded hole, which is used in cooperation with connecting bolt (208).

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