Marine mast

Abstract

The invention relates to a marine mast and belongs to the technical field of ship structures, the marine mast comprises a base, a mast body and a damping control assembly, the base is fixedly arranged on a deck, the mast body is erected on the base, the bottom of the mast body is rotatably connected to the base, and the bottom of the mast body extends towards the base to form a balance weight part; the damping control assembly is arranged at the rotating fulcrum of the base and the mast body and used for adjusting the rotating resistance in the laying or erecting process of the mast body, the situation that the mast body is damaged when being laid down due to the fact that the mast body is pulled too fast manually is avoided, and the problems that when a traditional gravity type mast is laid down, the speed is uncontrollable, and the mast body is damaged are solved. Meanwhile, the environmental adaptability is high, the damping strength can be optimized no matter the ship is in a calm, shaking or strong wind environment, the risk of manual operation errors can be reduced, and the effect that the mast body is damaged due to the fact that the impact force is large when the mast body is put down is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of hull structures, and particularly to a marine mast. Background Art

[0002] As an important structural component of a ship, a mast is usually used to carry antennas for navigation and communication equipment and navigation signal lamps, and its height directly affects the navigation safety and function realization of the ship. However, when passing through height-limited areas (such as bridges and locks), the problem of height limitation of a fixed mast becomes prominent, and a mast structure that can be quickly lowered needs to be designed to adapt to complex navigation environments.

[0003] Currently, the mainstream collapsible masts adopt a gravity balance design. Its core components include a mast body, a bottom rotary bearing, and a balance counterweight box. By fixing the balance box (filled with heavy objects such as lead blocks) on one side of the bottom fulcrum of the mast, a lever structure is formed. Utilizing the gravity of the counterweight box, only one person needs to manually unlock and gently push the mast to complete the lowering or erection operation, without relying on hydraulic or electric drive, and it has the advantages of simple structure and low maintenance cost.

[0004] However, in actual applications, the lowering of the mast completely depends on manual control. When the mast is lowered too quickly, although the mast can be lowered in time, under the action of gravitational acceleration, it topples rapidly, and the instantaneous impact force when the end of the mast touches the deck is too large, which is likely to cause damage to the mast or the deck. Especially in a situation where the ship is shaking or in a strong wind environment, it is even more difficult for the operator to control the toppling speed of the mast, which is likely to further increase the collision risk. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a marine mast to solve the technical problem in the prior art that the lowering of the mast completely depends on manual control, which is likely to cause rapid toppling and result in damage to the mast or the deck.

[0006] The present invention provides a marine mast, including: A base, fixedly arranged on the deck; A mast body, erected on the base, the bottom of the mast body is rotatably connected to the base, and a counterweight member extends from the bottom of the mast body towards the base; A damping control assembly, arranged at the base and the rotation fulcrum of the mast body, for adjusting the rotational resistance during the lowering or erection of the mast body.

[0007] Optionally, the damping control assembly includes: A magnetorheological fluid cavity, arranged on the base and hermetically filled with magnetorheological fluid, and the rotation axis of the mast body extends into the magnetorheological fluid cavity and contacts the magnetorheological fluid; An electromagnetic coil, arranged around the outside of the magnetorheological fluid cavity.

[0008] Optionally, the damping control assembly further includes a damping blade, which is arranged on the rotation axis of the mast body and extends into the magnetic fluid cavity. When the mast body rotates, the damping blade pushes the magnetic fluid to flow.

[0009] Optionally, a rotary bearing is provided on the base, the rotary shaft on the mast body penetrates into the rotary bearing and is connected to the inner ring of the rotary bearing, and the mast body is rotatably connected to the base via the rotary bearing; The space between the inner ring and outer ring of the rotating bearing constitutes the magnetic fluid cavity, the electromagnetic coil is arranged on the outer wall of the outer ring of the rotating bearing, and the damping blade passes through the inner ring of the rotating bearing and contacts the magnetic fluid in the magnetic fluid cavity.

[0010] Optionally, a control module is further included, and the control module and the damping control component are used to output a control signal according to the real-time movement state of the mast body to control the damping strength of the damping control component.

[0011] Optionally, the control module includes: An angle sensor, provided on the mast body, for detecting the tilt angle of the mast body; The controller is used to receive the signal from the angle sensor and generate a current control instruction based on a preset algorithm to adjust the input current of the electromagnetic coil.

[0012] Optionally, the control module further includes: An acceleration sensor is provided on the mast body and is used to detect the angular acceleration of the mast body. The controller receives a signal from the acceleration sensor and generates a current control instruction based on a preset algorithm to adjust the input current of the electromagnetic coil.

[0013] Optionally, the operating mode of the controller includes a reclining mode, wherein the reclining mode controls the damping control component to adjust the damping strength in stages according to the inclination angle of the mast body, specifically: When the tilt angle is less than 30 degrees, a signal of a first current value is output to the electromagnetic coil, so that the magnetic fluid is in a high viscosity state; When the tilt angle is greater than 30 degrees and less than 80 degrees, a signal of a second current value is output to the electromagnetic coil, so that the magnetic fluid is in a low viscosity state; When the tilt angle is greater than 80 degrees, a signal of a third current value is output to the electromagnetic coil, so that the magnetic fluid is in a state of step-by-step viscosity increase.

[0014] Optionally, a mast support is further included, which is arranged on the deck. When the mast body is laid down, the mast body and the mast support are in contact.

[0015] Optionally, an electromagnet and a pressure sensor are connected to the mast support. When the pressure sensor senses that the mast body is placed on the mast support, the electromagnet is energized to attract the mast body.

[0016] The technical solution of the present invention has the following advantages: 1. The marine mast provided by the present invention is equipped with a damping control assembly on the rotational fulcrum of the base and the mast body, so as to be able to adjust the rotational resistance of the mast body in real time when it is lowered or erected, thereby preventing the mast body from being damaged when it is lowered due to manual pulling of the mast body too quickly. This solves the problem of uncontrollable speed and large impact force when lowering the traditional gravity-type mast. At the same time, the present invention has strong environmental adaptability. Regardless of whether the ship is in a calm, shaking or strong wind environment, the damping strength can be optimized, the risk of human operational errors is reduced, and the problem of large impact force damaging the mast body when it is lowered is reduced.

[0017] 2. In the marine mast provided by the present invention, the damping control component is integrated at the rotation fulcrum of the base and the mast body, avoiding the need for external complex mechanisms on the deck and occupying deck space. The damping control component is configured as a magnetic fluid cavity and an electromagnetic coil, which occupies less space and avoids the large space occupied by traditional damping components. The control is more precise. Since the damping control component is always exposed on the deck, it will be affected by the external environment. However, by configuring a magnetic fluid cavity and an electromagnetic coil, it is less affected by the external environment and the use effect will not be affected by hot or cold weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 Schematic diagram of the overall structure of the ship mast of the present invention; Figure 2 for Figure 1 Enlarged view of part A in the middle; Figure 3 A schematic diagram of a ship mast being lowered in the present invention; Figure 4 is a schematic diagram of the ship mast of the present invention from another perspective; Figure 5 is a schematic diagram of the mast body of the present invention; Figure 6Schematic diagram of the rotary bearing and damping control component in the present invention; Figure 7 Schematic diagram of the internal structure of the mast support in the present invention.

[0020] Explanation of reference numerals: 1. Base; 2. Mast body; 3. Counterweight; 4. Damping control component; 41. Magnetorheological fluid cavity; 42. Electromagnetic coil; 43. Damping vane; 5. Rotary bearing; 51. Inner ring; 52. Outer ring; 6. Control module; 61. Angle sensor; 62. Controller; 63. Acceleration sensor; 7. Mast support; 8. Electromagnet; 9. Pressure sensor; 10. Rotating shaft. Specific embodiments

[0021] The following will describe in detail specific embodiments of the present invention with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the description of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0022] Unless otherwise clearly defined and limited, terms such as "set", "installed", "connected", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use. It is only for the convenience of description and simplification of the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0024] Terms such as "first", "second", "third", etc. are only used to distinguish elements with similar attributes, rather than indicating or implying relative importance or a specific order.

[0025] The term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to including the listed elements, it may also include other elements not specifically listed.

[0026] Embodiment Refer to Figures 1 - 7As shown in the figure, the present invention provides a marine mast, which includes a base 1, a mast body 2, and a damping control component 4. The base 1 is fixedly arranged on the deck of the ship, the mast body 2 is erected on the base 1, a rotating shaft 10 is arranged on the bottom side wall of the mast body 2, and the mast body 2 is rotationally connected to the base 1 through the rotating shaft 10. The base 1 is arranged in an inverted door shape, the bottom end of the mast body 2 is covered by the base 1 and is connected to the side wall of the base 1. There is a gap between the bottom surface of the mast body 2 and the base 1. A counterweight 3 is formed by extending the bottom of the mast body 2 towards the base 1. The counterweight 3 is arranged as a counterweight box, and about 110 kg of lead blocks or other heavy objects are filled in the counterweight box. The damping control component 4 is arranged at the rotation fulcrum of the base 1 and the mast body 2 for adjusting the rotational resistance during the process of the mast body 2 being laid down or erected.

[0027] By arranging the damping control component 4 at the rotation fulcrum of the base 1 and the mast body 2, the rotational resistance during the rotation when laying down or erecting the mast body 2 can be adjusted in real time, thereby avoiding the situation that the mast body 2 is pulled too fast by manpower, resulting in damage to the mast body 2 when it is laid down. This solves the problems of the uncontrollable speed and large impact force when the traditional gravity-type mast is laid down. At the same time, it has strong environmental adaptability. Whether the ship is in a calm, swaying or strong wind environment, it can optimize the damping intensity, reduce the risk of human operation errors, and reduce the problem of large impact force damaging the mast body 2 when the mast body 2 is laid down.

[0028] Specifically, in order to enable the mast body 2 to be rotationally connected to the base 1, a vertically arranged rotary bearing 5 is arranged on the base 1. The rotary bearing 5 is erected on the base 1, and the side wall of the outer ring 52 of the rotary bearing 5 is fixedly connected to the base 1. The axis of the rotary bearing 5 is perpendicular to the vertical mast body 2. The rotating shaft 10 on the mast body 2 penetrates into the rotary bearing 5 and is fixedly connected to the inner wall of the inner ring 51 of the rotary bearing 5. When the mast body 2 rotates, at this time, the inner ring 51 of the rotary bearing 5 rotates together with the rotating shaft 10 of the mast body 2, and the mast body 2 is rotationally connected to the base 1 through the rotary bearing 5; In this embodiment, for the rotating shaft 10, two are provided. The two rotating shafts 10 are respectively arranged on both sides of the mast body 2, and the two rotating shafts 10 are symmetrically arranged with respect to the mast body 2. Two rotary bearings 5 are also provided, and the mast body 2 is located between the two rotary bearings 5. The rotary bearings 5 and the rotating shafts 10 are arranged in one-to-one correspondence. The two rotating shafts 10 respectively penetrate into the corresponding rotary bearings 5 and are fixedly connected to the inner ring 51 of the rotary bearings 5. When the mast body 2 is laid down or erected, the rotating shaft 10 rotates in the rotary bearing 5 to lay down or erect the mast body 2.

[0029] As a specific implementation manner, referring to Figure 1 and Figure 6As shown in the figure, the damping control component 4 includes a magnetorheological fluid cavity 41 and an electromagnetic coil 42. The magnetorheological fluid cavity 41 is arranged on the base 1 and is hermetically filled with magnetorheological fluid. The magnetorheological fluid cavity 41 is arranged in a ring shape, and the magnetorheological fluid is arranged to be flowable within the magnetorheological fluid cavity 41. The rotating shaft 10 of the mast body 2 extends into the magnetorheological fluid cavity 41 and contacts the magnetorheological fluid. The electromagnetic coil 42 surrounds the outside of the magnetorheological fluid cavity 41. By energizing the electromagnetic coil 42, a vertical magnetic field can be generated, thereby adjusting the viscosity of the magnetorheological fluid within the magnetorheological fluid cavity 41. By controlling the viscosity of the magnetorheological fluid, the rotational resistance when the rotating shaft 10 rotates on the base 1 can be changed, so as to control the lowering speed of the mast body 2; Specifically, the magnetorheological fluid is set as an Fe3O4 nanoparticle suspension; the damping control component 4 is integrally arranged at the rotation fulcrum of the base 1 and the mast body 2, avoiding the external complex mechanism on the deck and occupying the deck space. The damping control component 4 is set as the magnetorheological fluid cavity 41 and the electromagnetic coil 42, which occupies less space and avoids the large space occupied by traditional damping components. By setting the damping control component 4 as the magnetorheological fluid cavity 41, it has good stability and high controllability of the magnetorheological fluid. Since the damping control component 4 is always exposed on the deck, it will be affected by the external environment. By setting the magnetorheological fluid cavity 41 and the electromagnetic coil 42, it is less affected by the external environment and will not be affected by the weather (hot or cold) in terms of the usage effect.

[0030] As an alternative embodiment, the space between the inner ring 51 and the outer ring 52 of the rotary bearing 5 forms the magnetorheological fluid cavity 41, and the electromagnetic coil 42 is arranged on the outer wall of the outer ring 52 of the rotary bearing 5. By integrating the magnetorheological fluid cavity 41 on the rotary bearing 5, there is no need to set up an additional space for the magnetorheological fluid cavity 41. Only by changing the rotary bearing 5 and arranging the electromagnetic coil 42 on the outer wall of the outer ring 52 of the rotary bearing 5 can the damping control component 4 be formed, further saving space and improving the structural compactness. At this time, the rotary bearing 5 can not only enable the mast body 2 to rotate but also act as a carrier for the magnetorheological fluid.

[0031] Furthermore, the damping control component 4 includes damping vanes 43. The damping vanes 43 are arranged on the rotating shaft 10 of the mast body 2 and are arranged circumferentially around the rotating shaft 10. The damping vanes 43 are evenly arranged along the circumference of the rotating shaft 10. The damping vanes 43 pass through the inner ring 51 of the rotary bearing 5 and extend into the magnetorheological fluid cavity 41 to contact the magnetorheological fluid. By arranging the damping vanes 43, when the mast body 2 rotates, the rotating shaft 10 rotates at this time, thereby driving the damping vanes 43 to push the magnetorheological fluid to move within the magnetorheological fluid cavity 41, thus enhancing the efficiency of the damping effect and increasing the maximum value of the damping. In another embodiment, the damping vanes 43 are only arranged on the inner wall of the inner ring 51 and do not need to be connected to the rotating shaft 10. The damping vanes 43 are fixed to the rotating shaft 10 through the outer ring 52.

[0032] As a specific implementation, referring to Figure 2 and Figure 3 shown in the figure, it further includes a control module 6. The control module 6 is connected to the damping control component 4 and is used to output a control signal according to the real-time motion state of the mast body 2 to control the damping strength of the damping control component 4. Specifically, the control module 6 includes an angle sensor 61 and a controller 62. Among them, the angle sensor 61 is arranged on the mast body 2 and is used to detect the inclination angle of the mast body 2. The controller 62 can be arranged on the mast body 2 or the base 1, or can be arranged at any position on the ship, as long as it can receive the signal of the angle sensor 61 and generate a current control instruction based on a preset algorithm to adjust the input current of the electromagnetic coil 42. In this embodiment, it is arranged on the base 1; Through the controller 62 and the angle sensor 61, it is possible to adjust the input current input into the electromagnetic coil 42 according to the inclination angle of the mast body 2. When the mast body 2 is laid down and the inclination angle of the mast body 2 is close to 90 degrees, at this time, the controller 62 controls and adjusts the input current of the electromagnetic coil 42 to the maximum. At this time, the viscosity of the magnetorheological fluid increases, and the movement of the damping vane 43 is blocked, so that the mast body 2 lands slowly, reducing the risk of damage to the mast body 2 to the lowest level.

[0033] Specifically, the working mode of the controller 62 includes a laying-down mode. The laying-down mode controls the damping control component 4 to adjust the damping strength in stages according to the inclination angle of the mast body 2. Specifically: The first stage: When the inclination angle is less than 30 degrees, the controller 62 outputs a signal of the first current value to the electromagnetic coil 42 to make the magnetorheological fluid in a high-viscosity state. At this time, due to the high viscosity of the magnetorheological fluid, the movement of the damping vane 43 is blocked, and the mast body 2 starts to be laid down slowly when it starts to be laid down; The second stage: When the inclination angle is greater than 30 degrees and less than 80 degrees, a signal of the second current value is output to the electromagnetic coil 42 to reduce the current and make the magnetorheological fluid in a low-viscosity state, reducing the resistance. The mast body 2 can be laid down quickly, avoiding the mast body 2 taking too long to be laid down, thus affecting the ship to pass through the height-limited area; The third stage: When the inclination angle is greater than 80 degrees, a signal of the second current value is output to the electromagnetic coil 42 to make the magnetorheological fluid in a stepwise increasing viscosity state, and the movement resistance of the damping vane 43 increases again. The mast body 2 lands slowly until it is laid down on the deck.

[0034] In the above, the inclination angle is the angle between the mast body 2 in the laid-down state and the mast body 2 in the erected state. Through the above three stages, the speed of the mast body 2 being laid down is controlled respectively. The first stage can ensure that the mast starts slowly, avoiding accidental acceleration caused by excessive thrust from the crew. The second stage releases the gravitational potential energy with low resistance, shortening the operation time and improving the laying-down efficiency. The third stage increases the resistance step by step when approaching the deck, gradually reducing the impact force of the mast body 2, protecting the mast body 2 and the deck structure, and avoiding a sudden increase in resistance, which may change the normal driving force during the crew's operation and affect the soft landing effect.

[0035] In this embodiment, the relationship between the inclination angle and the current value is set as:

[0036] Where θ is the inclination angle of the mast body, 5A is a constant high current value, 2A is a constant low current value, and the relationship between the viscosity of the magnetorheological fluid and the current is set as where μ 0 is the viscosity of the magnetorheological fluid without a magnetic field, μs is the maximum viscosity under the magnetic field limit. Through the above settings, the inclination angle is associated with the current value, and the current value is associated with the viscosity of the magnetorheological fluid, facilitating the controller 62 to directly adjust the current value of the electromagnetic coil 42 according to the different inclination angles of the mast body 2 measured by the angle sensor 61, and then control the viscosity of the magnetorheological fluid to adjust the damping when the mast body 2 rotates.

[0037] As another implementation manner, referring to Figure 2 and Figure 3 shown, the control module 6 further includes an acceleration sensor 63. The acceleration sensor 63 is arranged on the side wall at the top of the mast body 2 and is used to detect the angular acceleration of the mast body 2. The controller 62 receives the signal from the acceleration sensor 63 and generates a current control instruction based on a preset algorithm to adjust the input current of the electromagnetic coil 42. By additionally setting an acceleration sensor 63, the acceleration when the mast body 2 is laid down can be detected in real time, so as to be able to perform an emergency brake. When it is detected that the acceleration of the mast body 2 changes suddenly and exceeds the preset value, at this time, the controller 62 will instantaneously transmit a signal to increase the current to the electromagnetic coil 42 to increase the viscosity of the magnetorheological fluid and instantaneously increase the damping, further avoiding the occurrence of collision risks. At the same time, different output current trajectories can be formulated according to different accelerations to optimize the damping curve and perform real-time regulation, avoiding the influence on the protection effect of the mast body 2 due to changes in the crew's thrust or replacement of different crew members resulting in different accelerations.

[0038] As another implementation manner, referring to Figure 3 and Figure 7As shown in the figure, the marine mast further includes a mast support 7. The mast support 7 is arranged on the deck. When the mast body 2 is laid down, the mast body 2 contacts the mast support 7, and the mast body 2 is supported by the mast support 7, avoiding direct contact between the mast body 2 and the deck. At the same time, a rubber layer is covered on the surface of the mast support 7. Through the setting of the rubber layer, when the mast body 2 is laid down, it can play a buffering role on the mast body 2 and further protect the mast body 2.

[0039] An electromagnet 8 and a pressure sensor 9 are connected to the mast support 7. The pressure sensor 9 is arranged on the side where the mast support 7 contacts the mast body 2. When the pressure sensor 9 senses that the mast body 2 is placed on the mast support 7, the electromagnet 8 is in an energized state to suck the mast body 2. The pressure sensor 9 is used to determine whether the mast body 2 is in place. By energizing the electromagnet, the mast body 2 is fixed, avoiding the mast body 2 from shaking due to external environmental influences and damaging the rotating connection.

[0040] Working principle: When the ship needs to lay down the mast body 2 when passing through a height-limited area, at this time, the crew starts to push the mast body 2 to lay it down. The inclination angle of the mast body 2 is detected by the angle sensor 61. When the inclination angle of the mast body 2 is less than 30 degrees, at this time, the controller 62 controls the power supply to the electromagnetic coil 42, making the magnetic field of the electromagnetic coil 42 stronger, the magnetorheological fluid becomes more viscous, and the damping blade 43 is subjected to stronger damping. Thus, the mast body 2 tilts slowly at this time, avoiding out of control. When the inclination angle is greater than 30 degrees and less than 80 degrees, at this time, the current of the electromagnetic coil 42 decreases, the magnetic field weakens, the magnetorheological fluid becomes thinner, and the resistance received by the damping blade 43 drops suddenly. Thus, it can push the mast body 2 to fall down quickly, saving operation time. When the inclination angle is greater than 80 degrees, the current of the electromagnetic coil 42 is gradually increased again, making the magnetic field of the electromagnetic coil 42 increase step by step, and the damping received by the damping blade 43 becomes stronger step by step. The mast body 2 is slowly placed on the mast support 7. When the mast body 2 contacts the pressure sensor 9 on the mast support 7 and the pressure sensor 9 reaches the preset value, at this time, the electromagnet 8 is energized to fix the mast body 2.

[0041] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A marine mast, characterized in that, Comprising: A base (1), fixedly arranged on the deck; A mast body (2), erected on the base (1), the bottom of the mast body (2) being rotatably connected to the base (1), and a counterweight (3) being formed by the bottom of the mast body (2) extending towards the base (1); A damping control assembly (4), arranged at the rotation fulcrum of the base (1) and the mast body (2), for adjusting the rotational resistance during the process of the mast body (2) being laid down or erected.

2. The marine mast according to claim 1, characterized in that, The damping control assembly (4) includes: A magnetorheological fluid cavity (41), arranged on the base (1) and hermetically filled with magnetorheological fluid, and the rotation shaft (10) of the mast body (2) extends into the magnetorheological fluid cavity (41) and contacts the magnetorheological fluid; An electromagnetic coil (42), arranged around the outside of the magnetorheological fluid cavity (41).

3. The marine mast according to claim 2, characterized in that, The damping control assembly (4) further includes a damping vane (43), the damping vane (43) being arranged on the rotation shaft (10) of the mast body (2) and extending into the magnetorheological fluid cavity (41), and when the mast body (2) rotates, the damping vane (43) pushes the magnetorheological fluid to flow.

4. The marine mast according to claim 3, characterized in that, A rotary bearing (5) is arranged on the base (1), and the rotation shaft (10) on the mast body (2) penetrates into the rotary bearing (5) and is connected to the inner ring (51) of the rotary bearing (5), and the mast body (2) is rotatably connected to the base (1) through the rotary bearing (5); The space between the inner ring (51) and the outer ring (52) of the rotary bearing (5) constitutes the magnetorheological fluid cavity (41), the electromagnetic coil (42) is arranged on the outer wall of the outer ring (52) of the rotary bearing (5), and the damping vane (43) passes through the inner ring (51) of the rotary bearing (5) and contacts the magnetorheological fluid in the magnetorheological fluid cavity (41).

5. The marine mast according to claim 2, characterized in that, It further includes a control module (6), the control module (6) being connected to the damping control assembly (4), for outputting a control signal according to the real-time motion state of the mast body (2) and controlling the damping intensity of the damping control assembly (4).

6. The marine mast according to claim 5, characterized in that, The control module (6) includes: An angle sensor (61), arranged on the mast body (2), for detecting the inclination angle of the mast body (2); A controller (62), for receiving the signal of the angle sensor (61) and generating a current control instruction based on a preset algorithm to adjust the input current of the electromagnetic coil (42).

7. The marine mast according to claim 6, characterized in that, The control module (6) further includes: An acceleration sensor (63), arranged on the mast body (2), for detecting the angular acceleration of the mast body (2), and the controller (62) receives the signal of the acceleration sensor (63) and generates a current control instruction based on a preset algorithm to adjust the input current of the electromagnetic coil (42).

8. The marine mast according to claim 6, characterized in that, The working mode of the controller (62) includes a laying-down mode, and the laying-down mode controls the damping control assembly (4) to adjust the damping intensity in stages according to the inclination angle of the mast body (2), specifically: When the tilt angle is less than 30 degrees, a signal with a first current value is output to the electromagnetic coil (42) to make the magnetorheological fluid in a high-viscosity state; When the tilt angle is greater than 30 degrees and less than 80 degrees, a signal with a second current value is output to the electromagnetic coil (42) to make the magnetorheological fluid in a low-viscosity state; When the tilt angle is greater than 80 degrees, a signal with a third current value is output to the electromagnetic coil (42) to make the magnetorheological fluid in a stepwise increasing viscosity state.

9. The marine mast according to claim 1, characterized in that, It further includes a mast support (7), and the mast support (7) is arranged on the deck. When the mast body (2) is laid down, the mast body (2) contacts the mast support (7).

10. The marine mast according to claim 9, characterized in that, An electromagnet (8) and a pressure sensor (9) are connected to the mast support (7). When the pressure sensor (9) senses that the mast body (2) is placed on the mast support (7), the electromagnet (8) is in an energized state to attract the mast body (2).

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