Rotary sea anchor power generation device for lifeboat

Abstract

The application relates to a rotary sea anchor power generation device for a lifeboat, belonging to the field of ship and ocean engineering. The device comprises a generator assembly, a transmission assembly and a sea anchor assembly. The generator assembly is connected with the sea anchor assembly through the transmission assembly. The sea anchor assembly rotates around the shaft under the transverse component force of the sea current, drives the generator to rotate and generates power through the transmission assembly. The sea anchor assembly comprises a plurality of resistance gaps arranged in the circumferential direction of the sea anchor body. The transverse component force of the water flow in the sea anchor body is balanced by the resistance gaps, so that the transverse component force of the water flow all points to the side away from the gap, a torque is generated on the conical surface of the sea anchor body, and the sea anchor rotates. When the sea current passes through the large-diameter end of the sea anchor, the transverse component force of the sea current acting on the inner side of the sea anchor makes the sea anchor rotate in one direction around the central shaft, drives the connecting rod to rotate, and thus the generator rotates to generate power. The device enhances the fixing robustness of the sea anchor power generation system and generalizes the application scene of the system.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding and marine engineering, and specifically relates to a rotating sea anchor power generation device for lifeboats. Background Technology

[0002] Sea anchors are hollow, parachute-like structures with a rope attached. When thrown into the water, they sink rapidly and expand, using the weight and resistance of the incoming seawater to secure the lifeboat. The purpose of sea anchors is to keep the bow of the lifeboat against the wind and waves, preventing it from capsizing in rough seas; they also slow the lifeboat's drift downwind, maintaining its position while awaiting rescue. International and domestic conventions, regulations, standards, and norms stipulate that lifeboats and life rafts should be equipped with a certain number of sea anchors.

[0003] In maritime survival, electricity is more readily available than diesel fuel, leading to the increasing market acceptance of electric lifeboats. These lifeboats are equipped with electrically powered distillation units and communication equipment, increasing the survival and rescue chances of sailors. Unmanned surface vessels (USVs) are now widely researched and applied, with most small and medium-sized USVs also being electrically powered. However, limited battery capacity significantly restricts their range and operating time. One way to provide continuous power to electric lifeboats and USVs is by installing solar panels, but current technology limits their conversion efficiency, and they are highly susceptible to weather conditions, unable to guarantee power supply during prolonged periods of rain or at night. Sea anchors experience significant forces during operation, and this energy can be utilized to generate electricity. If the forces exerted on sea anchors are converted into electricity, this device can be used regardless of weather conditions, operating wherever there is seawater flow, making its application more widespread and efficient.

[0004] Existing technologies for generating electricity using sea anchors involve placing a generator at the stern of the anchor. When ocean currents pass over the anchor, they drive the generator's blades to rotate and generate electricity. The disadvantages of this technology are: sea anchors are difficult to deploy; the generator being at one end of the anchor can cause it to sag and become entangled, preventing it from functioning properly; the presence of multiple cables around the generator can lead to the generator blades becoming entangled with these cables, preventing further power generation; and the exposed nature of the generator makes the blades susceptible to entanglement with plankton or damage from collisions with hard floating objects. Summary of the Invention

[0005] The technical problem to be solved:

[0006] To overcome the shortcomings of existing technologies, this invention provides a rotating sea anchor power generation device for lifeboats. It adds a slit to a traditional sea anchor with an opening tangent to the conical surface. When ocean currents pass through the large-diameter end of the anchor, the lateral component of the current force on the inner side of the anchor causes it to rotate around its central axis in one direction, driving the connecting rod to rotate, thereby rotating the generator to produce electricity. This device enhances the stability and robustness of the sea anchor power generation system and broadens its application scenarios.

[0007] The technical solution of the present invention is: a rotating sea anchor power generation device for lifeboats, comprising a generator assembly, a transmission assembly and a sea anchor assembly, wherein the generator assembly is connected to the sea anchor assembly through the transmission assembly; the sea anchor assembly rotates around an axis under the lateral force of the ocean current, and drives the generator to rotate and generate electricity through the transmission assembly;

[0008] The sea anchor assembly includes multiple resistance gaps arranged circumferentially along the sea anchor body. These resistance gaps disrupt the lateral force balance of the water flow within the sea anchor body, causing the lateral force of the water flow to point away from the gaps. This generates a torque on the conical surface of the sea anchor body, causing the sea anchor to rotate.

[0009] A further technical solution of the present invention is: the sea anchor assembly includes a sea anchor body and a frame, the outer contour of the sea anchor body is a hollow cone with openings at both ends, and a supporting frame is provided inside.

[0010] A further technical solution of the present invention is: the resistance gap is obtained by the misalignment of the conical surface at the generatrix of the anchor body, and the misalignment of the conical surface forms the inner and outer walls of the resistance gap.

[0011] A further technical solution of the present invention is as follows: the skeleton includes a large-diameter end skeleton, a small-diameter end skeleton, and a slotted support strip. The large-diameter end skeleton is a ring with the same cross-section as the large-diameter end of the anchor body, and is provided with reinforcing ribs inside. The small-diameter end skeleton is a proportionally reduced version of the large-diameter end skeleton and has the same cross-section as the small-diameter end of the anchor body. The slotted support strip is used to support the misaligned space of the conical surface.

[0012] A further technical solution of the present invention is as follows: the reinforcing rib in the large-diameter end skeleton is a large-diameter end connecting rope fixed to its inner ring surface, and the large-diameter end connecting rope is an equilateral triangle with a side length of 40.7cm; the reinforcing rib in the small-diameter end skeleton is a small-diameter end connecting rope fixed to its inner ring surface, and the small-diameter end connecting rope is an equilateral triangle with a side length of 3.9cm; the height of the slit support strip at the large-diameter end is 4.3cm, and the height at the small-diameter end is 0.4cm.

[0013] A further technical solution of the present invention is: the main body of the sea anchor includes three fan-shaped canvases of the same size and shape, the bottom radius of the fan-shaped canvases is 25cm, the top radius is 3cm, and the generatrix is ​​65.4cm; the three fan-shaped canvases are evenly distributed in a staggered manner along the circumference, and their edges are respectively fixed to the large-diameter end frame, the small-diameter end frame and the slotted support strip to form an integral structure.

[0014] A further technical solution of the present invention is: the generator assembly includes a generator, a generator shaft and a generator bearing housing, the generator is fixed inside the hull, the generator shaft extends through the waterproofed hull to the anchorage; the generator bearing housing is fixed to the output end of the generator shaft.

[0015] A further technical solution of the present invention is: the transmission assembly includes a connecting rod, a cross shaft, a connecting rod bearing seat, a turntable bearing seat, a turntable, a turntable rod, a cable ring, and a cable. One end of the connecting rod is connected to the generator bearing seat through the cross shaft, and the other end is equipped with a connecting rod bearing seat. The connecting rod bearing seat is connected to the turntable bearing seat through the cross shaft, and the turntable bearing seat is installed on one side plate of the turntable.

[0016] The turntable has an embedded shaft along its central axis, and multiple turntable rods are evenly distributed around the circumference of the embedded shaft. The embedded shaft contains a spring, which can automatically retract the turntable rods when no force is applied. One end of multiple cables is fixedly connected to each cable ring, and the other end is fixed to the large-diameter end frame.

[0017] A further technical solution of the present invention is: it also includes a push rod motor assembly, the push rod motor assembly including a push rod motor body, a push rod, a push rod bearing seat, and a connecting rod sliding bearing; the push rod motor body is mounted on the hull; the push rod is a push rod integrated with the push rod motor, and its end is hinged to the connecting rod sliding bearing through the push rod bearing seat; the connecting rod sliding bearing has a central through hole and is fitted onto the connecting rod of the transmission part; the axial displacement of the push rod is driven by the push rod motor body to realize the extension and retraction of the connecting rod.

[0018] Working principle: When power generation is needed, the ship's control center sends a signal to the push rod motor, which pushes the connecting rod downwards. After being pushed out, the connecting rod remains stationary at the stern end, connected to the generator, while the bow end pulls the anchor assembly into the water. The connecting rod forms a 30° angle with the horizontal plane. The ship drifts with the ocean current, and simultaneously, the connecting rod pulls the anchor assembly, creating resistance on the anchor's sail in the direction of the current. At this point, the anchor begins to work, not only providing a pulling force in the direction of the current to prevent the ship from changing position, but also rotating due to the lateral component of the resistance, thus driving the generator to generate electricity.

[0019] When power generation needs to be stopped and retraction is required, the ship's control center sends a reverse signal to the push rod motor, which retracts the push rod, thereby retracting both the transmission assembly and the anchor assembly.

[0020] Beneficial effects

[0021] The beneficial effects of this invention are as follows:

[0022] 1. The rotating sea anchor designed in this invention not only utilizes the longitudinal component of the force on the sea anchor to achieve the two functions of fixing the ship's position and reducing rolling, but also innovatively utilizes the lateral component of the sea anchor to rotate the sea anchor, thereby driving the generator to rotate and generate electrical energy, thus improving the efficiency of tidal energy utilization.

[0023] 2. Compared to solar energy, ocean currents are a long-term and stable force, and this power generation device is unaffected by weather or day / night cycles, allowing it to operate continuously for extended periods and making it suitable for a wide range of applications. For example, when applied to lifeboats, it can sustainably power batteries, distillers, and communication equipment, ensuring crew members have access to fresh water and allowing the outside world to determine the ship's location, thus increasing their chances of survival and rescue.

[0024] 3. Compared to other designs that require the propeller to extend outside the hull, the device of this invention places the generator and pushrod motor inside the hull, preventing damage to the unit and blades from impacts with floating objects, and also simplifying the waterproofing process. The parts exposed in the water are the transmission assembly and the anchor assembly. The main body of the transmission assembly is a rigid connecting rod, and the main body of the anchor assembly is a canvas and a cable. Both components are characterized by simple structure, replaceability, and strong anti-interference ability. Furthermore, in rough sea conditions, they can drive the motor to retrieve the anchor. Therefore, the entire device is simple, reliable, and highly robust, suitable for harsh and complex marine environments.

[0025] 4. Compared to other tidal energy generation devices that rely solely on ocean currents to drive propeller blades and generate electricity, the force pulling the anchor in this invention originates from the force of the ocean current propelling the ship. When the current velocity and generator power are the same, the force-bearing area of ​​the ship is significantly larger than that of the propeller, therefore the force on this invention is also greater. With a properly adjusted cone angle on the anchor, the total amount of tidal energy converted into electrical energy per unit time is significantly greater than that of a propeller-type generator. Furthermore, due to the orifice design at the conical tip of the anchor in this invention, the anchor can function normally simply by being placed in the water, without needing to consider directional stability.

[0026] In this invention, the turntable rod of the transmission component can be retracted; the sea anchor is secured to the transmission component with a cable and can be untied and retracted into the cabin; and the anchor body is made of canvas material and can also be folded for storage. These designs are all to save space inside the lifeboat to store more rescue supplies. Attached Figure Description

[0027] Figure 1 This is a front view of the entire device of the present invention when the push rod is extended and the sea anchor is working;

[0028] Figure 2 This is a front view of the entire device of the present invention when the push rod is retracted and the sea anchor is removed;

[0029] Figure 3 This is an isometric view of the generator assembly of the present invention;

[0030] Figure 4 This is an isometric view of the transmission component of the present invention;

[0031] Figure 5 This is an isometric view of the turntable rod of the present invention when it is open.

[0032] Figure 6 This is an isometric view of the closed turntable rod of the present invention;

[0033] Figure 7 This is an isometric view of the sea anchor assembly of the present invention;

[0034] Figure 8 This is a front view of the sea anchor assembly (excluding the cable) of the present invention;

[0035] Figure 9 This is an isometric view of the push rod motor assembly of the present invention;

[0036] Explanation of reference numerals in the attached diagram: 1-Generator assembly; 2-Transmission assembly; 3-Sea anchor assembly; 4-Push rod motor assembly; 11-Generator; 12-Generator shaft; 13-Generator bearing housing; 21-Connecting rod; 22-Cross shaft; 23-Connecting rod bearing housing; 24-Turntable bearing housing; 25-Turntable; 26-Turntable rod; 27-Cable ring; 31-Canvas; 32-Large diameter end frame; 33-Small diameter end frame; 34-Large diameter end connecting rope; 35-Small diameter end connecting rope; 36-Slit support strip; 37-Cable; 41-Push rod motor body; 42-Push rod; 43-Push rod bearing housing; 44-Connecting rod sliding bearing. Detailed Implementation

[0037] The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0039] Existing sea anchors are conical fabric bags, similar in principle to parachutes. The tip of the cone typically has an opening to reduce resistance and prevent excessive force from tearing the anchor. Another function is to stabilize the direction, allowing the anchor to quickly and stably open and point towards the incoming current when it enters the water. In a typical sea anchor, water flows from the larger opening to the smaller opening. The force of this water flow acts on the inner side of the canvas with longitudinal and lateral components. The longitudinal component points towards the incoming current, exerting a force on the ship opposite to that of drifting with the current. However, because the cross-section of the sea anchor is a complete circle, the lateral components cancel each other out. In this embodiment, the cross-section of the ordinary sea anchor is divided into three equal parts and extended. The origins of the three arcs are offset to form an equilateral triangle. A gap is created between the generatrices of the ends of each pair of conical sections, allowing water to pass through. This disrupts the balance of the lateral components of the water flow, causing the lateral component of the water flow on each section of the anchor to point away from the gap. This generates a torque on the conical surface, causing the anchor to rotate longitudinally.

[0040] Reference Figure 1 As shown, this embodiment of a rotating sea anchor power generation device for lifeboats includes a generator assembly 1, a transmission assembly 2, a sea anchor assembly 3, and a push rod motor assembly 4. The device is pre-fixed to the bottom of the bow, with a downward-facing groove to accommodate the entire system. Therefore, in the following description of this device, the orientation on the horizontal plane will be described as "towards the bow," "towards the stern," "towards the port side," and "towards the starboard side," and the rotation direction will be clockwise and counterclockwise from the stern to the bow. Both conventional sea anchors and the sea anchor of this invention use canvas as the material for the anchor cone surface; therefore, the two sides of the anchor body are referred to as the "inner canvas side" and the "outer canvas side." For ease of description, the direction of the line connecting the large and small openings of the sea anchor will be defined as "longitudinal," and the direction perpendicular to this line will be defined as "transverse."

[0041] In this embodiment, the entire device is pre-positioned at the bow and longitudinally along the bow-stern line of the ship, with the opening facing the bow. That is, relative to the ship, the generator assembly 1 is in a relatively aft position, while the sea anchor assembly 3 is in a relatively forward position. During operation, the sea anchor body extends towards the bow, with the larger opening end facing the stern and the smaller opening end facing the bow.

[0042] See Figure 1 , Figure 2 The entire device consists of a generator assembly 1, a transmission assembly 2, a sea anchor assembly 3, and a push rod motor assembly 4. The two ends of the transmission assembly 2 are connected to the generator assembly 1 and the sea anchor assembly 3, respectively, while the push rod motor assembly 4 is connected to the push rod 21 of the transmission assembly 2.

[0043] See Figure 3The generator assembly 1 consists of a generator 11, a generator shaft 12, and a generator bearing housing 13. The generator 11 is fixed inside the ship, and the generator shaft 12 extends through the waterproofed hull into the anchorage. The stern end of the generator shaft 12 is connected to the generator 11, and the bow end is fixed to the generator bearing housing 13. The generator bearing housing 13 is connected to the cross shaft of the transmission assembly 2.

[0044] See Figure 4 , Figure 5 , Figure 6 The transmission assembly 2 consists of a connecting rod 21, a cross shaft 22, a connecting rod bearing housing 23, a turntable bearing housing 24, a turntable 25, a turntable rod 26, and a cable ring 27. Both ends of the connecting rod 21 have connecting rod bearing housings 23, each connected to a cross shaft 22. The cross shaft 22 facing the stern is connected to the generator bearing housing 13, and the cross shaft facing the bow is connected to the turntable bearing housing 24. The turntable bearing housing 24 is fixedly connected to the turntable 25. The turntable 25 has an embedded shaft perpendicular to it, used to connect the turntable rod 26. A cable ring 27 is welded to the other end of the turntable rod 26, and the cable ring 27 is connected to the cable 37 of the anchor assembly 3. A spring is installed in the embedded shaft, which automatically retracts the turntable rod 26 when no force is applied. Figure 5 This describes the state of the turntable rod 26 within turntable 25 when the entire power generation unit is operating in seawater. Figure 6 This is the state of the turntable lever 26 in turntable 25 when the entire device is retracted into the cabin.

[0045] See Figure 7 , Figure 8 The anchor assembly 3 consists of canvas 31, a large-diameter end frame 32, a small-diameter end frame 33, a large-diameter end connecting rope 34, a small-diameter end connecting rope 35, a slotted support strip 36, and a cable 37. The main body of the anchor assembly 3 is a truncated cone formed by three pieces of canvas 31 (this is how it looks as a whole). The edges of the upper and lower bottom surfaces are supported by wires, referred to as the large-diameter end frame 32 and the small-diameter end frame 33, respectively. The three ends on the same side inside the opening are connected by the large-opening connecting rope 34 and the small-opening connecting rope 35, respectively, to ensure that the anchor shape is maintained and does not come apart; at the same time, they are connected to the cable 37, so that the anchor body is connected to the cable ring 27 of the transmission assembly 2 through the cable 37. The end on the outer side of the bottom edge of the large opening is separated from the canvas inside by the slotted support strip 36 to prevent the two pieces of canvas from sticking together, which would prevent the anchor from rotating.

[0046] In this embodiment, the main load-bearing components of the anchor assembly 3 are three equal-sized and shaped canvas pieces supported by a stainless steel frame. Each canvas piece has a base radius of 25cm, a top radius of 3cm, and a generatrix length of 65.4cm. Two disc-shaped stainless steel frames support the large and small openings, with essentially the same shape except for size. The large triangle at the center of the frame at the large opening end is a stainless steel strip with a side length of 40.7cm, and the slit support strip is 4.3cm long. The triangle at the center of the frame at the small opening end has a side length of 3.9cm, and the slit support strip is 0.4cm long. The generatrix of the fan-shaped canvas is also edged with stainless steel strips of the same length as the fan-shaped generatrix of the canvas.

[0047] In this embodiment, the sea anchor assembly, while ensuring its function of preventing ship drift, also serves to generate electricity. During system operation, the sea anchor experiences a force sufficient to pull the entire lifeboat. This force, acting on the anchor's canvas, has a significant lateral component, enough to drive the motor to rotate. This design offers excellent directional stability, ensuring that the large opening of the sea anchor always faces the direction of the incoming current, a feature that propeller-type rotating devices cannot achieve. This allows the design of this invention to guarantee normal power generation in complex underwater environments.

[0048] See Figure 9 The push rod motor assembly 4 consists of a push rod motor body 41, a push rod 42, a push rod bearing seat 43, and a connecting rod sliding bearing 44. The push rod motor body 41 is fixedly connected to the hull. The push rod 42 is a push rod integrated with the push rod motor 41. A push rod bearing seat 43 is fixedly connected to the end of the push rod 42, which is connected to the connecting rod sliding bearing 44. The hole of the connecting rod sliding bearing 44 is fitted onto the connecting rod 21 of the transmission assembly 2.

[0049] When the device is in operation, the ship sends a signal to the push rod motor 4, causing the push rod 42 to push the connecting rod 21 downwards. After being pushed out, the connecting rod 21 remains stationary at the stern end connected to the generator assembly 1, while the bow end pulls the anchor assembly 3 into the water. The connecting rod 21 forms a 30° angle with the horizontal plane. As the ship drifts with the current, the connecting rod 21 pulls the anchor, creating resistance on the anchor's canvas 31 in the direction of the current. The anchor then begins to work, not only providing a pulling force in the direction of the current to prevent the ship from changing position, but also rotating due to the lateral component of the resistance, driving the generator 11 to generate electricity. When retraction is needed, the push rod motor 4 sends a signal in the opposite direction, causing the push rod 42 to retract, thus retracting both the transmission assembly 2 and the anchor assembly 3.

[0050] During installation, a downward-facing watertight hatch needs to be opened at the front of the hull. When the device is retracted, personnel inside the enclosed lifeboat can untie the mooring lines through the watertight hatch and retrieve the anchor into the cabin.

[0051] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A rotating sea anchor power generation device for lifeboats, characterized in that: It includes a generator assembly, a transmission assembly, and a sea anchor assembly. The generator assembly is connected to the sea anchor assembly through the transmission assembly. The sea anchor assembly rotates around its axis under the lateral force of the ocean current, and drives the generator to rotate and generate electricity through the transmission assembly. The sea anchor assembly includes multiple resistance gaps arranged circumferentially along the sea anchor body. These resistance gaps disrupt the lateral force balance of the water flow within the sea anchor body, causing the lateral force of the water flow to point away from the gaps. This generates a torque on the conical surface of the sea anchor body, causing the sea anchor to rotate. The sea anchor assembly includes a sea anchor body and a frame. The outer contour of the sea anchor body is a hollow cone with openings at both ends, and a supporting frame is provided inside. The resistance gap is formed by the misalignment of the conical surface at the generatrix of the anchor body, and the misalignment of the conical surface forms the inner and outer walls of the resistance gap. The skeleton includes a large-diameter end skeleton, a small-diameter end skeleton, and a slotted support strip, wherein the slotted support strip is used to support the misaligned space of the conical surface; The main body of the sea anchor consists of three fan-shaped canvases of the same size and shape; the three fan-shaped canvases are evenly distributed and staggered around the circumference, and their edges are fixed to the large-diameter end frame, the small-diameter end frame and the slotted support strip as an integral structure.

2. The rotating anchor power generation device for lifeboats according to claim 1, characterized in that: The large-diameter end skeleton is a circular ring with the same cross-section as the large-diameter end of the anchor body, and is equipped with reinforcing ribs inside; the small-diameter end skeleton is a proportionally reduced version of the large-diameter end skeleton and has the same cross-section as the small-diameter end of the anchor body.

3. The rotating sea anchor power generation device for lifeboats according to claim 2, characterized in that: The reinforcing ribs within the large-diameter end frame are large-diameter end connecting ropes fixed to its inner ring surface, and the large-diameter end connecting ropes are equilateral triangles with a side length of 40.7cm; the reinforcing ribs within the small-diameter end frame are small-diameter end connecting ropes fixed to its inner ring surface, and the small-diameter end connecting ropes are equilateral triangles with a side length of 3.9cm; the height of the slit support strip at the large-diameter end is 4.3cm, and the height at the small-diameter end is 0.4cm.

4. The rotating anchor power generation device for lifeboats according to claim 3, characterized in that: The fan-shaped canvas has a bottom radius of 25cm, a top radius of 3cm, and a generatrix of 65.4cm.

5. The rotating anchor power generation device for lifeboats according to claim 1, characterized in that: The generator assembly includes a generator, a generator shaft, and a generator bearing housing. The generator is fixed inside the hull, and the generator shaft extends through the waterproofed hull into the sea anchorage. The generator bearing housing is fixed to the output end of the generator shaft.

6. The rotating anchor power generation device for lifeboats according to claim 5, characterized in that: The transmission assembly includes a connecting rod, a cross shaft, a connecting rod bearing housing, a turntable bearing housing, a turntable, a turntable rod, a cable ring, and a cable. One end of the connecting rod is connected to the generator bearing housing via the cross shaft, and the other end is equipped with a connecting rod bearing housing. The connecting rod bearing housing is connected to the turntable bearing housing via the cross shaft, and the turntable bearing housing is installed on one side plate of the turntable. The turntable has an embedded shaft along its central axis, and multiple turntable rods are evenly distributed around the circumference of the embedded shaft. The embedded shaft contains a spring, which can automatically retract the turntable rods when no force is applied. One end of multiple cables is fixedly connected to each cable ring, and the other end is fixed to the large-diameter end frame.

7. The rotating sea anchor power generation device for lifeboats according to claim 6, characterized in that: It also includes a push rod motor assembly, which comprises a push rod motor body, a push rod, a push rod bearing housing, and a connecting rod sliding bearing; the push rod motor body is mounted on the hull; the push rod is a push rod integrated with the push rod motor, and its end is hinged to the connecting rod sliding bearing through the push rod bearing housing; the connecting rod sliding bearing has a central through hole and is fitted onto the connecting rod of the transmission part; the axial displacement of the push rod is driven by the push rod motor body to realize the extension and retraction of the connecting rod.

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