Energy-saving propulsion device for ships

Abstract

This invention discloses an energy-saving propulsion device for ships, relating to the field of marine technology. It includes: a fixed frame, a support rod, a motor, a rotating shaft, a propulsion impeller, and a mesh protective cover. A pushing mechanism is provided on the outer wall of the rotating shaft. The pushing mechanism includes a rhomboid plate and an arc-shaped push rod. A radial groove is formed along the center direction on the circular mesh plate of the mesh protective cover. A slider that slides with the radial groove is provided on the side wall of the arc-shaped push rod. A spring is provided between one side of the slider and one side of the inner wall of the radial groove. A circular block is provided at the end of the slider away from the arc-shaped push rod, located inside the circular mesh plate of the mesh protective cover and corresponding to the side edge of the rhomboid plate. The rotating shaft drives the pushing mechanism to rotate, ultimately causing the arc-shaped push rod to move outward. This push rod then pushes away flexible objects covering the mesh protective cover, preventing them from covering the surface of the mesh protective cover and thus avoiding increased resistance and reduced propulsion speed.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and in particular to an energy-saving propulsion device for ships. Background Art

[0002] Ship propulsion refers to the energy converter in the ship propulsion device. It converts the power generated by the engine into the thrust of the ship to overcome the resistance of the ship sailing in the water and propel the ship forward. The propeller is the most common one. The existing ship energy-saving propulsion device adopts air lubrication technology to reduce the friction resistance between the water flow and the hull by generating a bubble layer at the bottom of the hull, thereby improving the speed and fuel efficiency. In addition, the use of high-efficiency propellers and optimized hull design can further reduce energy consumption. These technologies combined with intelligent control systems can automatically adjust the working state of the propulsion device according to the sailing conditions to achieve the effect of energy saving and emission reduction.

[0003] The patent with the patent announcement number CN206243426U discloses a ship propeller, including a motor, the motor is connected to a propeller through a rotating shaft, a protective cover is arranged outside the propeller, the protective cover includes a water inlet part and a water outlet part, the propeller is located at the junction of the water inlet part and the water outlet part, the water inlet part has a truncated cone shape, the water outlet part has a cylindrical shape, and the channel inside the water outlet part gradually narrows from the junction with the water inlet part to the water outlet; the protective cover is fixed to the motor through two mutually symmetrical side wings, and the outer edge of the side wings is a sharp blade and is arc-shaped. By setting the protective cover, the propeller can be effectively protected to prevent water plants or garbage in the water from being drawn into the propeller during navigation, and at the same time, it has good propulsion efficiency.

[0004] The above-mentioned ship propeller still has the following problems when in use: although the above-mentioned protective cover can protect the propeller and prevent aquatic plants or garbage in the water from being drawn into the propeller; however, during navigation, aquatic plants may easily be entangled in the water inlet part of the protective cover and the rotating shaft near the water inlet part, and flexible marine garbage (such as plastic bags) may easily cover the water inlet part of the protective cover, and the above-mentioned propeller cannot cut or clean the entangled and covered aquatic plants, flexible marine garbage, etc. during navigation, which increases the resistance of the propeller and reduces the propulsion rate. Summary of the invention

[0005] The object of the present invention is to provide a ship energy-saving propulsion device to solve the problems raised in the prior art.

[0006] The technical solution of the present invention to solve the above technical problems is as follows:

[0007] A ship energy-saving propulsion device comprises a fixed frame, a support rod vertically arranged on the top of the fixed frame, a motor installed in the fixed frame, a rotating shaft connected to the output shaft of the motor, a plurality of propulsion impellers arranged at circumferential intervals on the outer wall of the rotating shaft, and a mesh protective cover arranged at the end of the fixed frame and covering the periphery of the propulsion impeller, wherein a pushing mechanism is arranged on the outer wall of the rotating shaft, and the pushing mechanism is located on a side close to the fixed frame;

[0008] The pushing mechanism includes a diamond plate arranged on the outer wall of the rotating shaft and located inside the mesh protective cover, and an arc-shaped push rod radially slidably arranged on the outside of the circular mesh plate of the mesh protective cover, a radial groove is opened on the circular mesh plate of the mesh protective cover along the center direction of the circle, a slider slidingly matched with the radial groove is arranged on the side wall of the arc-shaped push rod, a spring is arranged between one side of the slider and one side inner wall of the radial groove, a round block is arranged on the end of the slider away from the arc-shaped push rod, the round block is located on the inner side of the circular mesh plate on the mesh protective cover and corresponds to the side of the diamond plate.

[0009] Furthermore, the arc-shaped push rods are provided in two groups and are symmetrically distributed on the outer side of the circular mesh plate on the mesh protective cover, and the number of radial slide grooves, sliders, springs and round blocks corresponds one to one to the arc-shaped push rods.

[0010] Furthermore, a second spring is arranged between the other side of the sliding block and the inner wall of the other side of the radial sliding groove, and the first spring is in a stretched state, and the second spring is in a compressed state.

[0011] Furthermore, it also includes an anti-adsorption mechanism;

[0012] The anti-adsorption mechanism includes two fixed blocks arranged on the arc-shaped outer side of the arc-shaped push rod, a rotating block rotatably connected between the two fixed blocks, an arc-shaped cutting rod arranged on the side of the rotating block away from the arc-shaped push rod and parallel to the arc-shaped push rod, and a plurality of cutting knives arranged at intervals on the side of the arc-shaped cutting rod away from the rotating block, and a torsion spring is arranged between the rotating block and the fixed block.

[0013] Furthermore, the arc-shaped push rod and the arc-shaped cutting rod are both in contact with the outer side of the circular mesh plate of the mesh protective cover, and the arc-shaped push rod and the arc-shaped cutting rod are both arranged in an Ω-shaped structure.

[0014] Furthermore, the anti-adsorption mechanism further comprises an arcuate abutment block which is arranged on the outer wall of the annular plate on the mesh protective cover and corresponds to the rod portion of the arcuate cutting rod, and the arcuate surface of the arcuate abutment block faces the arcuate cutting rod.

[0015] Furthermore, the arc-shaped abutment block is adjacent to the radial sliding groove.

[0016] Furthermore, all the cutting knives are evenly spaced and arranged on the arc-shaped cutting rod.

[0017] Furthermore, the pushing mechanism further comprises an arc block 1 arranged on the inner wall of the circular mesh plate of the mesh protective cover, a U-shaped connecting plate arranged on the side of the diamond plate away from the circular mesh plate of the mesh protective cover, and a U-shaped elastic rod slidably penetrated on the horizontal plate of the U-shaped connecting plate, and a T-shaped arc block is arranged on the side of the U-shaped elastic rod close to the U-shaped connecting plate;

[0018] There is a gap between the diamond plate and the inner side of the circular mesh plate of the mesh protective cover, the arc end of the T-shaped arc block passes through the diamond plate and extends into the gap, and the arc block one is located on the circumferential running path of the T-shaped arc block.

[0019] Furthermore, the diamond plate is provided with a through hole for the T-shaped arc block to pass through, and the U-shaped elastic rod includes a U-shaped rod slidably penetrated on the horizontal plate, and a spring three respectively mounted on two side rods of the U-shaped rod, and the spring three is connected between the horizontal plate and the end of the side rod of the U-shaped rod.

[0020] The present invention has the following beneficial effects:

[0021] 1. The energy-saving ship propulsion device of the present invention is provided with a propulsion mechanism. When the motor drives the propulsion impeller to rotate through the rotating shaft, the rotating shaft will simultaneously drive the diamond plate to rotate. When the diamond plate rotates, it will contact the round block through its side and push the round block to move through the outer edge of the diamond plate. The round block drives the slider to slide along the radial slide groove and slide radially away from the rotating shaft. The slider drives the arc push rod to move, and then the water plants and soft garbage covered and contacted on the circular mesh plate of the mesh protective cover are pushed away through the arc push rod, so as to avoid covering and entanglement on the circular mesh plate of the mesh protective cover, thereby avoiding increasing the resistance of the propulsion device and reducing the propulsion rate.

[0022] 2. The present invention arranges spring 1 and spring 2 between the slider and the inner walls on both sides of the radial slide groove, which can ensure that the slider is reset under the action of the spring elastic force after sliding, and then can drive the arc push rod to reset; at the same time, through the cooperation of arc block 1, U-shaped connecting plate, U-shaped elastic rod and T-shaped arc block, when the diamond plate rotates, it drives the U-shaped connecting plate and the U-shaped elastic rod to rotate together, and when the arc surface of the T-shaped arc block contacts arc block 1, the spring 3 on the U-shaped elastic rod will be compressed, and when the arc surface of the T-shaped arc block does not contact arc block 1, the U-shaped elastic rod resets under the action of spring 3, and then drives the T-shaped arc block to reset. The T-shaped arc block resets and knocks the circular mesh plate of the mesh protective cover, which makes the silk screen on the circular mesh plate vibrate, and then it is easy to loosen or fall off the water plants and flexible garbage covered on the silk screen, and then cooperate with the arc push rod to make it easier to push away the water plants and flexible garbage.

[0023] 3. The energy-saving ship propulsion device of the present invention is provided with an anti-adsorption mechanism. When the T-shaped arc block moves, the fixed block and the rotating block will push the arc cutting rod to move radially, and the cutting knife on the outside of the arc cutting rod will cut the water grass, flexible garbage and other debris, so as to facilitate the cutting of the covered or entangled debris, avoid affecting the propulsion impeller, and ensure the propulsion rate; by providing an arc-shaped resistance block, when the arc-shaped cutting rod contacts the arc surface of the arc-shaped resistance block, the arc-shaped cutting rod will be deflected and displaced axially. At this time, the rotating block rotates around the two fixed blocks, and finally drives the cutting knife to deflect, so that the cutting knife can more easily cut the water grass, flexible garbage, etc. into fragments, so that the fragments can be more easily washed away by the water flow; the torsion spring is used to drive the arc-shaped cutting rod to reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of a ship energy-saving propulsion device;

[0025] Figure 2 This is a schematic diagram of the partial structure of the ship's energy-saving propulsion device;

[0026] Figure 3 It is a structural diagram of the propulsion mechanism;

[0027] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of part A;

[0028] Figure 5 It is a structural schematic diagram of the anti-adsorption mechanism;

[0029] Figure 6 for Figure 5 A schematic diagram of the enlarged structure of part B;

[0030] Figure 7 for Figure 5 Schematic diagram of the enlarged structure of part C.

[0031] In the figure: 1. fixed frame; 2. support rod; 3. motor; 4. rotating shaft; 5. propulsion impeller; 6. mesh protective cover; 61. radial slide groove; 7. pushing mechanism; 71. diamond plate; 72. arc push rod; 73. slider; 74. spring one; 75. round block; 76. spring two; 77. arc block one; 78. U-shaped connecting plate; 781. cross plate; 79. U-shaped elastic rod; 791. U-shaped rod; 792. spring three; 710. T-shaped arc block; 8. anti-adsorption mechanism; 81. fixed block; 82. rotating block; 83. arc cutting rod; 84. cutting knife; 85. torsion spring; 86. arc resistance block. DETAILED DESCRIPTION

[0032] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0033] like Figures 1 to 5 As shown, an embodiment of the present invention provides an energy-saving propulsion device for a ship, comprising a fixed frame 1, the fixed frame 1 is a cylindrical structure, and the interior of the fixed frame 1 is hollow, a support rod 2 is vertically arranged on the top of the fixed frame 1, and the end of the support rod 2 away from the fixed frame 1 is connected to the steering handle of the ship; a motor 3 installed in the fixed frame 1, a rotating shaft 4 connected to the output shaft of the motor 3, a plurality of propulsion impellers 5 are circumferentially spaced on the outer wall of the rotating shaft 4, the propulsion impeller 5 is located outside the end of the fixed frame 1, and a mesh protective cover 6 is arranged at the end of the fixed frame 1 and covers the periphery of the propulsion impeller 5; wherein the mesh protective cover 6 includes an annular plate and a circular mesh plate connected to one end of the annular plate, the end of the circular mesh plate is a water inlet, and the other end of the annular plate is a water outlet, the circular mesh plate is located on a side close to the fixed frame 1, and a mounting circular hole matching the fixed frame 1 is opened in the middle of the circular mesh plate, and the circular mesh plate on the mesh protective cover 6 is fixedly installed at the end of the fixed frame 1, which is used to protect the propulsion impeller 5. In other embodiments of the present invention, in order to further prevent other debris from entering the water outlet of the mesh protective cover 6, a filter screen plate may be fixed at the other end of the annular plate.

[0034] The outer wall of the rotating shaft 4 is provided with a pushing mechanism 7, and the pushing mechanism 7 is located on a side close to the fixed frame 1; specifically, the pushing mechanism 7 includes a diamond plate 71 arranged on the outer wall of the rotating shaft 4 and located inside the mesh protective cover 6, a through hole is opened in the middle of the diamond plate 71 to cooperate with the rotating shaft 4, and the diamond plate 71 is fixed to the outer wall of the rotating shaft 4, and an arc-shaped push rod 72 is radially slidably arranged on the outer side of the circular mesh plate of the mesh protective cover 6, a radial groove 61 is opened on the circular mesh plate of the mesh protective cover 6 along the center direction of the circle, and the side wall of the arc-shaped push rod 72 is provided with a through hole to cooperate with the radial groove 6 The slider 73 is fixed to the side of the arc push rod 72 close to the circular mesh plate, and the size of the slider 73 matches the groove diameter of the radial slide groove 61; a spring 74 is arranged between one side of the slider 73 and the inner wall of one side of the radial slide groove 61, and a round block 75 is arranged at the end of the slider 73 away from the arc push rod 72, and the round block 75 is located on the inner side of the circular mesh plate on the mesh protective cover 6 and corresponds to the side of the diamond plate 71; in this embodiment, the side of the circular mesh plate of the mesh protective cover 6 close to the propulsion impeller 5 is the inner side, and the side close to the fixed frame 1 is the outer side.

[0035] In addition, two groups of arc-shaped push rods 72 are provided in this embodiment, and are symmetrically distributed on the outer side of the circular mesh plate on the mesh protection cover 6, and the number of radial slide grooves 61, sliders 73, springs 74 and round blocks 75 corresponds to the arc-shaped push rods 72. In this embodiment, the arc-shaped portion of the arc-shaped push rod 72 is a semicircular structure, and the size of the arc-shaped portion matches the size of the fixed frame 1.

[0036] A second spring 76 is disposed between the other side of the slider 73 and the inner wall of the other side of the radial slot 61, and the first spring 74 is in a stretched state, and the second spring 76 is in a compressed state. The coordinated use of the first spring 74 and the second spring 76 facilitates the reset of the slider 73, and further facilitates the reset of the arc push rod 72.

[0037] When the propulsion device is used, the motor 3 is started, and the output shaft of the motor 3 will drive the rotating shaft 4 to rotate, and the rotation of the rotating shaft 4 will drive the propulsion impeller 5 to rotate, thereby realizing the propulsion of the ship; when the rotating shaft 4 rotates, it will drive the diamond plate 71 to rotate together, and when the diamond plate 71 rotates, the outer edge of the diamond plate 71 will push the round block 75 to move, and the movement of the round block 75 will drive the slider 73 to slide along the inner wall of the radial slide groove 61, and make the slider 73 slide radially away from the rotating shaft 4, and the movement of the slider 73 will drive the arc push rod 72 to move, and when the arc push rod 72 moves, it will push away the water plants and soft garbage on the circular mesh plate of the mesh protective cover 6, thereby avoiding covering the circular mesh plate of the mesh protective cover 6, avoiding increasing the resistance of the propulsion device and reducing the propulsion rate.

[0038] like Figures 3 to 6 As shown, the pushing mechanism 7 also includes an arc block 77 arranged on the inner wall of the circular mesh plate of the mesh protective cover 6, a U-shaped connecting plate 78 arranged on the side of the circular mesh plate of the diamond plate 71 away from the mesh protective cover 6, and a U-shaped elastic rod 79 slidably penetrated on the cross plate 781 of the U-shaped connecting plate 78, and a T-shaped arc block 710 is arranged on the side of the U-shaped elastic rod 79 close to the U-shaped connecting plate 78; there is a gap between the diamond plate 71 and the inner side of the circular mesh plate of the mesh protective cover 6, and the gap is greater than the height of the arc block 77; a through hole is opened on the diamond plate 71 for the T-shaped arc block 710 to pass through, the arc end of the T-shaped arc block 710 passes through the diamond plate 71 and extends into the gap, and the arc block 77 is located on the circumferential running path of the T-shaped arc block 710. The U-shaped spring rod 79 includes a U-shaped rod 791 that is slidably mounted on the horizontal plate 781, and a sliding hole is provided on the horizontal plate 781 to facilitate the sliding of two side rods of the U-shaped spring rod 79, and a spring three 792 is respectively mounted on the two side rods of the U-shaped rod 791, and the spring three 792 is connected between the horizontal plate 781 and the ends of the side rods of the U-shaped rod 791. In this embodiment, two groups of U-shaped connecting plates 78 are provided and symmetrically distributed at both ends of the diamond plate 71, and the number of U-shaped spring rods 79 and T-shaped arc blocks 710 is equal to that of the U-shaped connecting plates 78; and a plurality of arc blocks 77 are arranged at intervals, and all arc blocks 77 are evenly distributed in the circumferential direction.

[0039] When the diamond plate 71 rotates, it drives the U-shaped connecting plate 78 and the U-shaped elastic rod 79 to rotate together. When the arc surface of the T-shaped arc block 710 contacts the arc block 1 77, the T-shaped arc block 710 will move in the direction of the propulsion impeller 5. The T-shaped arc block 710 drives the U-shaped rod 791 to slide along the cross plate 781 of the U-shaped connecting plate 78. At this time, the spring three 792 is compressed. When the arc surface of the T-shaped arc block 710 does not contact the arc block 1 77, the U-shaped rod 791 is driven to reset under the action of the spring three 792, and then the T-shaped arc block 710 is reset. The T-shaped arc block 710 is reset and knocks on the circular mesh plate of the mesh protective cover 6. The knocking will cause the silk screen on the circular mesh plate to vibrate, which will easily loosen or fall off the water plants and flexible garbage covered on the silk screen. Then, the arc push rod 72 is used to push away the water plants and flexible garbage.

[0040] like Figure 5 and Figure 7 As shown, a ship energy-saving propulsion device in another embodiment of the present invention further includes an anti-adsorption mechanism 8;

[0041] The anti-adsorption mechanism 8 includes two fixed blocks 81 arranged on the arc outer side of the arc push rod 72, a rotating block 82 rotatably connected between the two fixed blocks 81, the rotating block 82 in this embodiment realizes rotational cooperation with the two fixed blocks 81 through the shaft hole, an arc cutting rod 83 arranged on the side of the rotating block 82 away from the arc push rod 72 and parallel to the arc push rod 72, and a plurality of cutting knives 84 arranged at intervals on the side of the arc cutting rod 83 away from the rotating block 82, and a torsion spring 85 is arranged between the rotating block 82 and the fixed block 81, and the torsion spring 85 facilitates the reset of the rotating block 82 after rotation. All the cutting knives 84 are evenly spaced and arranged on the arc cutting rod 83. In this embodiment, the side of the arc portion of the arc push rod 72 away from the fixed frame 1 is the outer side, and vice versa is the inner side.

[0042] The arc push rod 72 and the arc cutting rod 83 in this embodiment are both in contact with the outer side of the circular mesh plate of the mesh protective cover 6, and the arc push rod 72 and the arc cutting rod 83 are both arranged in an Ω-shaped structure; specifically, a semicircular arc portion, and straight rods connected to both ends of the arc portion and extending outward, and the length of the arc push rod 72 matches the diameter of the circular mesh plate.

[0043] like Figure 5 As shown, the anti-adsorption mechanism 8 further includes an arcuate abutment block 86 disposed on the outer wall of the annular plate on the mesh protective cover 6 and corresponding to the rod portion of the arcuate cutting rod 83, and the arcuate surface of the arcuate abutment block 86 faces the arcuate cutting rod 83. Moreover, the arcuate abutment block 86 is adjacent to the radial slide groove 61.

[0044] The movement of the arc-shaped push rod 72 will drive the fixed block 81 to move, the movement of the fixed block 81 will drive the rotating block 82 to move, the movement of the rotating block 82 will drive the arc-shaped cutting rod 83 to move, and the cutting knife 84 on the outside of the arc-shaped cutting rod 83 will cut aquatic plants, soft garbage and other debris, so as to facilitate the cutting of covering or entangled debris, avoid affecting the propulsion impeller 5, and ensure the propulsion rate.

[0045] When the arc-shaped cutting rod 83 moves outward and hits the arc surface of the arc-shaped resistance block 86, the arc surface of the arc-shaped resistance block 86 causes the arc-shaped cutting rod 83 to deflect, thereby causing the rotating block 82 to rotate around the fixed block 81. The arc-shaped cutting rod 83 will drive the cutting knife 84 to deflect, and several cutting knives 84 will cut aquatic plants, flexible materials, etc. into fragments, so that the fragments can be more easily washed away by the water flow.

[0046] The energy-saving ship propulsion device of the present invention starts the motor 3, and the output shaft of the motor 3 drives the rotating shaft 4 to rotate, and the rotation of the rotating shaft 4 drives the propulsion impeller 5 to rotate, thereby realizing the propulsion of the ship; the water grass, flexible garbage, etc. covering or entangled on the circular mesh plate of the mesh protective cover 6 can be pushed away by the propulsion mechanism 7, thereby preventing the flexible materials from covering the water inlet of the mesh protective cover 6, avoiding increasing the resistance of the propulsion device and reducing the propulsion rate; the water grass, flexible garbage, etc. can be cut by the anti-adsorption mechanism 8, so that the fragments can be more easily washed away by the water flow, which is convenient for cleaning the entangled debris and ensuring the propulsion rate of the propulsion impeller 5.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A ship energy-saving propulsion device, comprising a fixed frame (1), a support rod (2) vertically arranged on the top of the fixed frame (1), a motor (3) installed in the fixed frame (1), a rotating shaft (4) connected to the output shaft of the motor (3), a plurality of propulsion impellers (5) arranged at circumferential intervals on the outer wall of the rotating shaft (4), and a mesh protective cover (6) arranged at the end of the fixed frame (1) and covering the periphery of the propulsion impeller (5), characterized in that: The outer wall of the rotating shaft (4) is provided with a pushing mechanism (7), and the pushing mechanism (7) is located on a side close to the fixing frame (1); The pushing mechanism (7) comprises a diamond plate (71) arranged on the outer wall of the rotating shaft (4) and located inside the mesh protective cover (6), and an arc-shaped push rod (72) radially slidably arranged on the outer side of the circular mesh plate of the mesh protective cover (6), the circular mesh plate of the mesh protective cover (6) is provided with a radial slide groove (61) along the center direction of the circle, the side wall of the arc-shaped push rod (72) is provided with a slider (73) slidably matched with the radial slide groove (61), a spring (74) is provided between one side of the slider (73) and the inner wall of one side of the radial slide groove (61), and a round block (75) is provided at one end of the slider (73) away from the arc-shaped push rod (72), and the round block (75) is located on the inner side of the circular mesh plate on the mesh protective cover (6) and corresponds to the side edge of the diamond plate (71); The arc-shaped push rod (72) is arranged in an Ω-shaped structure; When the output shaft of the motor (3) drives the rotating shaft (4) to rotate, the rotating shaft (4) drives the propulsion impeller (5) and the diamond plate (71) to rotate together. When the diamond plate (71) rotates, its outer edge pushes the round block (75) to move. The round block (75) moves and drives the slider (73) to slide along the radial slide groove (61), and the slider (73) slides in a direction away from the rotating shaft (4). The slider (73) drives the arc push rod (72) to move, and the waterweed and soft garbage on the circular mesh plate covering the mesh protective cover (6) are pushed away by the arc push rod (72).

2. The ship energy-saving propulsion device according to claim 1, characterized in that: The arc-shaped push rods (72) are provided in two groups and are symmetrically distributed on the outer side of the circular mesh plate on the mesh protective cover (6). The number of the radial slide grooves (61), the sliders (73), the springs (74) and the round blocks (75) corresponds one to one to the number of the arc-shaped push rods (72).

3. The ship energy-saving propulsion device according to claim 1, characterized in that: A second spring (76) is provided between the other side of the sliding block (73) and the other side inner wall of the radial sliding groove (61), and the first spring (74) is in a stretched state, and the second spring (76) is in a compressed state.

4. The energy-saving ship propulsion device according to any one of claims 1 to 3, characterized in that: It also includes an anti-adsorption mechanism (8); The anti-adsorption mechanism (8) comprises two fixed blocks (81) arranged on the outer side of the arc of the arc push rod (72), a rotating block (82) rotatably connected between the two fixed blocks (81), an arc cutting rod (83) arranged on a side of the rotating block (82) away from the arc push rod (72) and parallel to the arc push rod (72), and a plurality of cutting knives (84) arranged at intervals on a side of the arc cutting rod (83) away from the rotating block (82), and a torsion spring (85) is arranged between the rotating block (82) and the fixed block (81).

5. The ship energy-saving propulsion device according to claim 4, characterized in that: The arc-shaped push rod (72) and the arc-shaped cutting rod (83) are both in contact with the outer side of the circular mesh plate of the mesh protective cover (6), and the arc-shaped cutting rod (83) is arranged in an Ω-shaped structure.

6. The energy-saving ship propulsion device according to claim 4, characterized in that: The anti-adsorption mechanism (8) further comprises an arc-shaped abutment block (86) which is arranged on the outer wall of the annular plate on the mesh protective cover (6) and corresponds to the rod portion of the arc-shaped cutting rod (83), and the arc surface of the arc-shaped abutment block (86) faces the arc-shaped cutting rod (83).

7. The energy-saving ship propulsion device according to claim 6, characterized in that: The arc-shaped abutment block (86) is adjacent to the radial sliding groove (61).

8. The energy-saving ship propulsion device according to claim 4, characterized in that: All the cutting knives (84) are evenly spaced and arranged on the arc-shaped cutting rod (83).

9. The energy-saving ship propulsion device according to claim 1, characterized in that: The pushing mechanism (7) further comprises an arc block (77) arranged on the inner wall of the circular mesh plate of the mesh protective cover (6), a U-shaped connecting plate (78) arranged on the side of the diamond plate (71) away from the circular mesh plate of the mesh protective cover (6), and a U-shaped elastic rod (79) slidably penetrated on the horizontal plate (781) of the U-shaped connecting plate (78), and a T-shaped arc block (710) contacting the circular mesh plate of the mesh protective cover (6) is arranged on the side of the U-shaped elastic rod (79) close to the U-shaped connecting plate (78); There is a gap between the diamond plate (71) and the inner side of the circular mesh plate of the mesh protective cover (6), the arc-shaped end of the T-shaped arc block (710) passes through the diamond plate (71) and extends into the gap, and the arc block 1 (77) is located on the circumferential running path of the T-shaped arc block (710); The diamond plate (71) is provided with a through hole for facilitating the passage of the T-shaped arc block (710); the U-shaped elastic rod (79) comprises a U-shaped rod (791) slidably penetrated on the transverse plate (781), and a third spring (792) respectively sleeved on two side rods of the U-shaped rod (791); the third spring (792) is connected between the transverse plate (781) and the end of the side rod of the U-shaped rod (791).

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