Integral shaft bracket

Abstract

The utility model discloses an integral type shaft support which is formed by combining a water heel part and a shaft sleeve part, the water heel part serves as a connecting support of the shaft sleeve part and a ship body and also serves as a water diversion heel of the ship body, and the top of the water heel part is connected to a ship bottom plate. The shaft sleeve part is detachably connected to the bottom of the water heel part, one end of the shaft sleeve part penetrates through a ship bottom plate and is connected with the ship bottom plate in a sealed mode, the water diversion heel and the shaft support are combined, when the water diversion heel and the shaft support are installed on the tail portion of a ship, an accessory of the water diversion heel can be reduced, resistance is reduced, and therefore the ship speed of the ship is greatly increased; and meanwhile, the requirement on the structural strength of the bracket is more easily met.

Description

Technical Field

[0001] The utility model relates to the technical field of ship stern shaft supporting equipment, in particular to an integral shaft bracket. Background Art

[0002] Some of the existing ships in operation are powered by twin propellers. The layout of twin propellers generally includes propellers, shaft brackets, shaft brackets, and water splitters. Their functions are as follows: the shaft bracket provides a support point for the tail shaft, the water splitter is to improve the navigation stability of the ship, and the shaft bracket is to ensure the watertightness of the hull and protect the shaft when the shaft passes through the outer plate. The conventional layout is as follows: Figure 1 、 Figure 2 .

[0003] The tail water heel and shaft support of conventional ships are arranged separately, which is equivalent to having three appendages at the tail, forming three "vortices" at the tail of the hull. A shaft support is generally provided at the place where the tail shaft passes through the outer plate, which causes a sudden change in the tail line shape, greatly affecting the resistance of the ship. At the same time, the wet surface area of the three appendages is large, which will increase the viscous pressure resistance of the ship, thereby reducing the ship speed or requiring greater main engine thrust.

[0004] The shaft bracket serves as a fixed support point for the tail shaft. High-speed propeller rotation generates significant lateral forces, which scale with the square of the rotational speed. This requires a high transverse section modulus for the shaft bracket to resist transverse bending moments, and each classification society has calculation requirements. Consequently, the arms of the tail shaft bracket on conventional ships are very thick. Some ships even use cast steel to reduce thickness, which not only increases ship resistance but also hinders welding to the hull structure due to the thickness of the steel. This makes welding difficult at shipyards and reduces force transmission, resulting in low structural reliability for the shaft bracket. Utility Model Content

[0005] In view of the above-mentioned technical problems existing in the existing shaft bracket, the purpose of the present utility model is to provide an integral shaft bracket. By combining the watershed heel with the shaft bracket, the watershed heel can be reduced when installed at the stern of the ship to reduce the resistance, thereby greatly improving the speed of the ship and making it easier to meet the structural strength requirements of the bracket.

[0006] In order to achieve the above-mentioned purpose, the utility model provides an integral shaft bracket, which is composed of a water heel part and a shaft sleeve part. The water heel part serves as a connecting bracket between the shaft sleeve part and the hull and also serves as the water heel of the hull. The top of the water heel part is connected to the bottom plate of the ship, and the shaft sleeve part is detachably connected to the bottom of the water heel part, and one end of the shaft sleeve part passes through the bottom plate of the ship and is sealed with the bottom plate.

[0007] Furthermore, the water heel portion includes an inner plate, a vertical plate, a bottom plate, a reinforcement plate, and a side plate.

[0008] The inner plate is connected and fixed to the lower part of the bottom plate of the ship, one end of the vertical plate is connected to one end of the inner plate, one end of the bottom plate is connected to the other end of the vertical plate, and the other end is connected to the other end of the inner plate, a plurality of reinforcing plates are connected between the bottom plate and the inner plate, and side plates are connected on both sides of the reinforcing plates;

[0009] The inner plate, vertical plate, bottom plate and side plates form a closed space.

[0010] Furthermore, except for the reinforcement plate located on one side of the vertical plate, the other reinforcement plates are all provided with a plurality of through holes.

[0011] Furthermore, the sleeve portion has a top surface, a bottom surface and four side surfaces distributed between the top surface and the bottom surface. An axial hole for the tail shaft to pass through is provided in the middle of the sleeve portion, and the overall width and length are adapted to the edema portion. By connecting the top surface with the bottom plate of the water heel portion, the sleeve portion is connected as a whole to the bottom of the water heel portion and forms a rectangular cross-section.

[0012] Furthermore, the bottom plate of the water heel part is an inwardly concave arc bottom plate, which is concave in the two side plates, and the top surface of the sleeve part is an outwardly convex arc surface adapted to the bottom plate, so that the bottom plate and the top surface can be embedded with each other.

[0013] Furthermore, the bottom surface of the shaft sleeve portion is arc-shaped.

[0014] Compared with the prior art, the integrated shaft bracket provided by the present invention has the following beneficial effects:

[0015] (1) The structural strength of the shaft bracket easily meets the requirements of the specifications, the welding process in the shipyard is simple, and the construction period is shortened;

[0016] (2) Reducing the number of ship appendages reduces the tail vortex and the total resistance of the ship, thereby increasing the speed or reducing the propeller power, thereby reducing the ship's operating costs;

[0017] (3) Since the bushing is reinforced throughout the entire range, it can protect the tail shaft more effectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a front view of the existing shaft bracket arrangement on the bottom of the ship;

[0020] Figure 2 A side view of the existing shaft support arrangement on the bottom of the ship;

[0021] Figure 3This is a schematic diagram of the integrated shaft bracket provided by the present invention when arranged on a twin-screw ship;

[0022] Figure 4 A side view of the integral shaft bracket provided by the present invention;

[0023] Figure 5 This is a front view of the integral shaft bracket provided by the utility model.

[0024] Illustration:

[0025] Water heel part 100, shaft sleeve part 200, bottom plate 300, tail shaft 400, propeller 500;

[0026] The vertical plate 110 , the bottom plate 120 , the reinforcing plate 130 , the through hole 131 , the side plate 140 , the top surface 210 , the bottom surface 220 , the side surface 230 , and the shaft hole 240 . DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0028] When the integral shaft bracket provided by the present invention is applied to a ship propelled by twin propellers 500, Figure 3 As shown, two integral shaft brackets are symmetrically installed on both sides of the stern midship line, forming only two appendages at the stern, which can greatly reduce the resistance to the ship.

[0029] Compared with the prior art where the water diverter heel and the shaft bracket are arranged separately, the integral bracket provided in this solution combines the water diverter heel and the shaft bracket into a combined form.

[0030] See also Figure 3-Figure 5 , which is a schematic structural diagram of the integral shaft bracket provided by the present invention.

[0031] As can be seen from the figures, the integral shaft support provided by the present invention includes two components: a water heel portion 100 and a shaft sleeve portion 200 .

[0032] The water heel part 100 serves as a connecting bracket between the shaft sleeve part 200 and the hull and also serves as the water heel of the hull.

[0033] The top of the water heel part 100 is connected to the bottom plate 300, and the sleeve part 200 is detachably connected to the bottom of the water heel part 100, and one end of the sleeve part 200 passes through the bottom plate 300 and is sealed with the bottom plate 300, so that the tail shaft 400 located inside the hull passes through one end of the sleeve part 200 connected to the bottom plate 300 and exits from the other end to be connected to the propeller 500.

[0034] The detachable connection between the sleeve portion 200 and the water heel portion 100 facilitates installation and maintenance of the tail shaft 400 .

[0035] Specifically, such as Figure 4 The water heel portion 100 includes an inner plate, a vertical plate 110, a bottom plate 120, a reinforcing plate 130, and a side plate 140.

[0036] The inner plate is welded and fixed to the lower part of the bottom plate 300. One end of the vertical plate 110 is welded to one end of the inner plate. One end of the bottom plate 120 is welded to the other end of the vertical plate 110, and the other end is welded to the other end of the inner plate. Several reinforcing plates 130 are welded between the bottom plate 120 and the inner plate. Side plates 140 are welded on both sides of the reinforcing plates 130.

[0037] The inner plate, the vertical plate 110 , the bottom plate 120 , and the side plates 140 form a closed space.

[0038] Furthermore, in order to reduce the weight of the overall structure of the bracket without reducing the structural strength, a plurality of reinforcing plates 130, except for one reinforcing plate 130 located on one side of the vertical plate 110, are provided with a plurality of through holes 131;

[0039] like Figure 4 That is, the reinforcing plate 130 closest to the propeller 500 is not designed with an opening. This reinforcing plate 130 plays a greater role in ensuring the structural strength of the shaft bracket. The other reinforcing plates 130 can effectively reduce the weight of the structure by opening through holes 131.

[0040] The water heel portion 100 of such a structure is cooperatively connected with the shaft sleeve portion 200 , and the bottom plate 120 in the water heel portion 100 is detachably connected with the shaft sleeve portion 200 .

[0041] like Figure 5 The sleeve portion 200 has a top surface 210, a bottom surface 220, and four side surfaces 230 distributed between the top surface 210 and the bottom surface 220. A shaft hole 240 for the tail shaft 400 to pass through is provided in the middle of the sleeve portion 200. The overall width and length of the sleeve portion 200 are adapted to the water heel portion 100. By connecting the top surface 210 with the bottom plate 120 of the water heel portion 100, the sleeve portion 200 is connected as a whole to the bottom of the water heel portion 100 and forms a rectangular cross-section.

[0042] Regarding the transverse section modulus of the center shaft bracket in the prior art, this solution forms a rectangular cross-section by connecting the sleeve part 200 with the water heel part 100. The section modulus of the rectangular cross-section is much larger than the conventional one, and only a smaller plate thickness is required to meet the requirements of the standard section modulus, which can greatly improve the stability and reliability of the overall structure.

[0043] Furthermore, in order to improve the reliability of the connection between the sleeve part 200 and the water heel part 100, the bottom plate 120 of the water heel part 100 is an inward-concave arc-shaped bottom plate, and the bottom plate 120 is concave in the two side plates 140, and the top surface 210 of the sleeve part 200 is an outward-convex arc-shaped surface adapted to the bottom plate 120, so that the bottom plate 120 and the top surface 210 can be embedded with each other.

[0044] This solution does not impose any restrictions on the detachable connection between the base plate 120 and the sleeve portion 200, which can be determined according to actual needs. For example, bolt connection can be used.

[0045] Furthermore, in order to improve the effect of the integral shaft bracket on the hull resistance, the bottom surface 220 of the shaft sleeve portion 200 is arc-shaped, and the arc-shaped streamlined shape can reduce the effect of the bracket on the hull resistance.

[0046] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. An integral shaft support, characterized in that: The shaft bracket is composed of a water heel part and a shaft sleeve part. The water heel part serves as a connecting bracket between the shaft sleeve part and the hull and also serves as the water heel of the hull. The top of the water heel part is connected to the bottom plate of the ship. The shaft sleeve part is detachably connected to the bottom of the water heel part, and one end of the shaft sleeve part passes through the bottom plate of the ship and is sealed and connected to the bottom plate.

2. The integrated shaft support according to claim 1, characterized in that: The water heel part includes an inner plate, a vertical plate, a bottom plate, a reinforcement plate, and a side plate. The inner plate is connected and fixed to the lower part of the bottom plate of the ship, one end of the vertical plate is connected to one end of the inner plate, one end of the bottom plate is connected to the other end of the vertical plate, and the other end is connected to the other end of the inner plate, a plurality of reinforcing plates are connected between the bottom plate and the inner plate, and side plates are connected on both sides of the reinforcing plates; The inner plate, vertical plate, bottom plate and side plates form a closed space.

3. The integrated shaft support according to claim 2, characterized in that: Except for one reinforcing plate located on one side of the vertical plate, the other reinforcing plates are all provided with a plurality of through holes.

4. The integrated shaft support according to claim 2, characterized in that: The sleeve part has a top surface, a bottom surface and four side surfaces distributed between the top surface and the bottom surface. An axial hole for the tail shaft to pass through is provided in the middle of the sleeve part, and the overall width and length are adapted to the edema part. By connecting the top surface with the bottom plate of the water heel part, the sleeve part is connected as a whole to the bottom of the water heel part and forms a rectangular cross-section.

5. The integrated shaft support according to claim 4, characterized in that: The bottom plate of the water heel part is an inwardly concave arc bottom plate, which is concave in the two side plates. The top surface of the shaft sleeve part is an outwardly convex arc surface adapted to the bottom plate, so that the bottom plate and the top surface can be embedded with each other.

6. The integrated shaft support according to claim 4, characterized in that: The bottom surface of the shaft sleeve part is arc-shaped.

Images