TWM636363U - Acceleration type propeller for ships - Google Patents

Abstract

The propeller of this creation comprises a paddle shaft, a plurality of first blades and a plurality of second blades. The first paddles are connected to the outer peripheral surface of the paddle shaft, so that the first paddles can run synchronously with the paddle shaft, and the second paddles are connected to the outer peripheral surface of the paddle shaft, so that they can be synchronized with the first paddles. The blades rotate in the same direction, the second blades are located in front of the first blades and correspond to the first blades in a one-to-one manner, and the size of the second blades is smaller than the The size of the first blades, and the rotation of the second blades is the same as that of the first blades. Thereby, the propeller of the present invention can improve the operating efficiency of the boat at high speed without increasing the size of the first blades.

Description

Speed-up propellers for boats

This creation is related to marine propellers, in particular to a marine accelerated propeller.

If a general boat wants to increase the speed of the boat, it usually chooses to configure a larger-sized propeller (for example, 16 inches or 17 inches). In shallower waterways, the operation safety of the boat may be affected due to the deeper draft. Therefore, how to increase the driving speed without increasing the size of the propeller (the usual size is 15.5 inches) is a problem that the industry is eager to overcome.

In addition, the propeller will generate transverse flow and longitudinal wake during the rotation process, and the transverse flow will generate sailing resistance and affect the propulsion efficiency. In order to improve the propulsion efficiency of the propeller by limiting the lateral flow and accelerating the longitudinal wake, the propeller disclosed in CN205256630U improves the propulsion efficiency by a double-flow structure, but the outer blade and the inner blade do not correspond to each other and the helical direction is opposite. The efficiency that can be improved in actual use is limited, so the practicability is not high.

The main purpose of this creation is to provide a marine speed-up propeller, which can improve the operating efficiency of the boat at high speed without increasing the size.

In order to achieve the above-mentioned main purpose, the propeller of the present invention includes a paddle shaft, a plurality of first blades, and a plurality of second blades. The first paddles are connected to the outer peripheral surface of the paddle shaft so that the first paddles can rotate synchronously with the paddle shaft; the second paddles are connected to the outer peripheral surface of the paddle shaft so that the second The paddles can also rotate synchronously with the paddle shaft, and can rotate in the same direction as the first paddles through the paddle shaft. In addition, the second paddles are located in front of the first paddles and connected to the second paddles. One blade corresponds to each other in a one-to-one manner, the size of the second blades is smaller than the size of the first blades, and the direction of rotation of the second blades is the same as the direction of rotation of the first blades same.

As can be seen from the above, the propeller of the present invention reduces the lateral flow by the smaller second blades, and at the same time increases the longitudinal wake by the second blades, so that it can be improved without increasing the first blades. Improve the operating efficiency of the boat at high speeds without compromising its size.

Preferably, the second paddles are 70% of the first paddles in diameter.

Preferably, the second paddles are one third of the first paddles in area.

Preferably, in a projected direction parallel to the axial direction of the paddle shaft, each of the second paddles completely falls within the range covered by the corresponding one of the first paddles.

Preferably, the trailing edge of each second blade is approximately located between the leading edges of two adjacent first blades, so that the effect of reducing turbulent flow can be achieved.

Preferably, the paddle shaft may be an integral structure, or may be composed of a shaft body and a ring body arranged at the front end of the shaft body, wherein the outer peripheral surface of the shaft body is connected with the first blades, the The outer peripheral surface of the ring body is connected with the second paddles.

The detailed structure, features, assembly or usage methods of the marine acceleration propeller provided by this creation will be described in the subsequent detailed description of the implementation. However, those with ordinary knowledge in the field of this creation should be able to understand that these detailed descriptions and the specific embodiments listed for implementing this creation are only used to illustrate this creation, and are not used to limit the scope of patent applications for this creation.

The applicant hereby explains that in the entire specification, including the embodiments described below and the claims of the scope of the patent application, the nouns related to direction are based on the directions in the drawings. Secondly, in the embodiments and drawings to be described below, the same component numbers represent the same or similar components or their structural features.

Please refer to FIG. 1 , the propeller 10 of the first embodiment of the present invention includes a propeller shaft 20 , a plurality of first blades 30 , and a plurality of second blades 40 .

In this embodiment, the paddle shaft 20 is a two-piece structure composed of a shaft body 21 and a ring body 23. As shown in Figures 2 and 3, the front end of the shaft body 21 has a joint portion 22, and the ring body 23 is tightly fastened to Fitted or welded to the assembly part 22 of the shaft body 21. In addition, the paddle shaft 20 further has a shaft sleeve 24. As shown in FIG. 2 and FIG. The sleeve 24 is connected with a power source (not shown in the figure), so that the paddle shaft 20 can be driven by the power source to rotate.

The first paddles 30 are connected to the outer peripheral surface of the shaft body 21 , so that the first paddles 30 can run synchronously with the paddle shaft 20 .

The second paddles 40 are connected to the outer peripheral surface of the ring body 23, so that the second paddles 40 can run synchronously with the paddle shaft 20 and rotate in the same direction as the first paddles 30 through the paddle shaft 20. to provide a diversion effect. As shown in Figures 3 and 4, the second paddles 40 are located in front of the first paddles 30 and correspond to the first paddles 30 in a one-to-one manner, and the second paddles The size of 40 is smaller than the size of first paddle 30, and in the present embodiment, the diameter of second paddle 40 is 11 inches, and the diameter of first paddle 30 is 15.5 inches, so the diameter of second paddle 40 is about 70% of the diameter of the first paddle 30 , and the area of the second paddle 40 is about one third of the area of the first paddle 30 . In addition, the rotation direction of the second paddle 40 is the same as that of the first paddle 30, and as shown in FIG. Within the range covered by the corresponding first blade 30, and the trailing edge 42 (Trailing edge) of the second blade 40 is approximately at the leading edge 32 (Leading edge) of two adjacent first blades 30 In the middle, the effect of reducing turbulence can be achieved in this way.

As can be seen from the above, the propeller 10 of the invention utilizes the propeller shaft 20 to drive the first blades 30 and the second blades 40 to run in the same direction, and the second blade 40 with a smaller size lowers the horizontal direction during operation. At the same time, the second blade 40 increases longitudinal wake in the direction of the first blade 30, so as to reduce sailing resistance and improve propulsion efficiency. In addition, in Fig. 6, the traditional propeller only has the first blade 30, but the propeller 10 of the present invention has the first blade 30 and the second blade 40, as can be seen from Fig. Under normal circumstances, the propeller 10 of the present creation will increase the speed of the ship more, so that the propeller 10 of the present creation can promote the boat without increasing the size of the first blade 30 (that is, keep it as 15.5 inches). The operating efficiency of the boat at high speeds.

Finally, it should be added that the paddle shaft 20 is not limited to a two-piece structure. As shown in FIG. The arrangement of the blades 40 in the above embodiments can also improve the operating efficiency of the boat when running at high speed.

10: Propeller 20: paddle shaft 21: Shaft body 22: Assembly department 23: ring body 24: shaft sleeve 25: Rib 30: The first paddle 32: leading edge 40: Second paddle 42: trailing edge

Fig. 1 is the three-dimensional view of the marine acceleration propeller of the first embodiment of the invention. Fig. 2 is the three-dimensional exploded view of the marine speed-up propeller of the first embodiment of the invention. Fig. 3 is the side view of the marine acceleration type propeller of the first embodiment of the invention. Fig. 4 is the end view of the marine acceleration type propeller of the first embodiment of the present invention. Fig. 5 is the three-dimensional view of the marine acceleration propeller of the second embodiment of the present invention. Fig. 6 is the curve graph of the speed of the ship and the rotational speed of the propeller of the present creation and the traditional propeller.

21: Shaft body

22: Assembly department

23: ring body

24: shaft sleeve

30: The first paddle

40: Second paddle

Claims (6)

A marine accelerated propeller, comprising: a paddle shaft; a plurality of first blades connected to the outer peripheral surface of the paddle shaft; and a plurality of second blades connected to the outer peripheral surface of the paddle shaft and capable of connecting with the The first paddles rotate in the same direction as the paddle shaft, the second paddles are located in front of the first paddles and correspond to the first paddles in a one-to-one manner, and the second paddles The size is smaller than the size of the first paddles, and the rotation direction of the second paddles is the same as that of the first paddles. The marine acceleration propeller according to claim 1, wherein the area of the second blades is one-third of the first blades. The marine acceleration propeller according to claim 1, wherein the diameter of the second blades is 70% of the diameter of the first blades. The marine acceleration propeller according to claim 1, wherein, in a projection direction parallel to the axial direction of the propeller shaft, each of the second blades is completely covered by the corresponding one of the first blades In the range. The marine speed-up propeller according to claim 1, wherein the first blades are connected to the outer peripheral surface of a shaft, the second blades are connected to the outer peripheral surface of a ring, and the ring is fixed on the shaft The front end of the body constitutes the paddle shaft with the shaft body. The marine acceleration propeller according to claim 1, wherein the trailing edge of each second blade is located between the leading edges of two adjacent first blades.

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