阅读说明：本技术 一种船舶隔振装置的安全保护系统 (Safety protection system of ship vibration isolation device ) 是由 谭海涛 李强 杨雪松 袁文策 王帅 殷洪 于 2020-12-18 设计创作，主要内容包括：本发明公开了一种船舶隔振装置的安全保护系统,所述安全保护系统包括：中央控制器以及与中央控制器相连的X向保护子系统、Y向保护子系统和Z向保护子系统；所述X向保护子系统、Y向保护子系统和Z向保护子系统分别安装在船体结构的隔舱壁上,且分别与船舶隔振装置的X向、Y向和Z向对应；所述X向保护子系统能够对船舶隔振装置的X向倾斜位移量进行限位或锁紧保护,Y向保护子系统能够对船舶隔振装置的Y向倾斜位移量进行限位或锁紧保护,Z向保护子系统能够对船舶隔振装置的Z向倾斜位移量进行限位和锁紧保护。(The invention discloses a safety protection system of a ship vibration isolation device, which comprises: the system comprises a central controller, and an X-direction protection subsystem, a Y-direction protection subsystem and a Z-direction protection subsystem which are connected with the central controller; the X-direction protection subsystem, the Y-direction protection subsystem and the Z-direction protection subsystem are respectively arranged on a bulkhead wall of the hull structure and respectively correspond to the X direction, the Y direction and the Z direction of the ship vibration isolation device; the X-direction protection subsystem can limit or lock and protect the X-direction oblique displacement of the ship vibration isolation device, the Y-direction protection subsystem can limit or lock and protect the Y-direction oblique displacement of the ship vibration isolation device, and the Z-direction protection subsystem can limit and lock and protect the Z-direction oblique displacement of the ship vibration isolation device.)

1. A safety protection system for a marine vibration isolation device, the safety protection system comprising: the system comprises a central controller, and an X-direction protection subsystem, a Y-direction protection subsystem and a Z-direction protection subsystem which are connected with the central controller; the X-direction protection subsystem, the Y-direction protection subsystem and the Z-direction protection subsystem are respectively arranged on a bulkhead wall of the ship body structure (1) and respectively correspond to the X direction, the Y direction and the Z direction of the ship vibration isolation device; the X-direction protection subsystem can limit or lock and protect the X-direction oblique displacement of the ship vibration isolation device, the Y-direction protection subsystem can limit or lock and protect the Y-direction oblique displacement of the ship vibration isolation device, and the Z-direction protection subsystem can limit and lock and protect the Z-direction oblique displacement of the ship vibration isolation device.

2. The safety protection system of the ship vibration isolation device according to claim 1, wherein the X-direction protection subsystem, the Y-direction protection subsystem and the Z-direction protection subsystem have the same structure and each include four protection units, and four protection units of the X-direction protection subsystem are respectively arranged in the X-direction on the fore side and the X-direction on the port and the starboard side at the stern of the ship body structure (1), four protection units of the Y-direction protection subsystem are respectively arranged in the Y-direction on the fore side and the port and the starboard side at the stern of the ship body structure (1), and four protection units of the Z-direction protection subsystem are respectively arranged in the Z-direction on the fore side and the starboard side at the stern of the ship body structure (1).

3. The safety protection system of ship vibration isolation devices as claimed in claim 2, wherein said ship vibration isolation devices employ buoyant raft vibration isolation devices (12).

4. The safety protection system for a ship vibration isolation device according to claim 3, wherein the four protection units in each protection subsystem have the same structure, and each protection unit comprises: a hydraulic cylinder (2), a displacement sensor (6), an action mechanism (7) and a plane sliding device;

the hydraulic cylinder (2) is arranged on a bulkhead of the hull structure (1), one end of the actuating mechanism (7) is arranged in the hydraulic cylinder (2), the other end of the actuating mechanism faces the buoyant raft vibration isolation device (12), the end part of the end is connected with a plane sliding device, and the displacement sensor (6) is arranged on the end face of one end of the hydraulic cylinder (2) opposite to the buoyant raft vibration isolation device (12) and used for detecting the inclined displacement of the buoyant raft vibration isolation device (12) relative to the set direction of the hull structure (1) and transmitting the inclined displacement to the central controller; when the inclination displacement is larger than a set value, the central controller controls the hydraulic cylinder (2) to drive the actuating mechanism (7) to extend out, so that the plane sliding device at the end part of the actuating mechanism (7) contacts or presses the floating raft vibration isolation device (12), and the set direction of the floating raft vibration isolation device is limited or locked.

5. The safety protection system of a ship vibration isolating device according to claim 4, wherein each protection unit further comprises: a stop block (3); and a stop block (3) is arranged on the outer surface of one end, extending into the hydraulic cylinder (2), of the action mechanism (7) and is used for limiting the action mechanism (7) after extending outwards to a set position.

6. Safety protection system for ship vibration isolation devices according to claim 4, characterized in that said planar sliding means are removably connected to the end of the actuating means (7).

7. The safety protection system of a ship vibration isolating device according to claim 4, wherein said planar sliding means comprises: base (8), bottom plate (9) and positioning spring (11), action mechanism (7) tip is installed in base (8), and its one side towards buoyant raft vibration isolation device (12) is equipped with the recess, and bottom plate (9) both sides are supported on two relative inside walls of recess in base (8) through positioning spring (11), and bottom surface sliding fit in the recess of one end through spherical structure more than two and base (8), the other end towards buoyant raft vibration isolation device (12).

8. The safety protection system of a ship vibration isolating device according to claim 7, wherein said planar sliding means further comprises: and the buffer block (10) is arranged at the end part of the base (8) opposite to the buoyant raft vibration isolation device (12) and is used for buffering the contact between the base (8) and the buoyant raft vibration isolation device (12).

Technical Field

The invention relates to the technical field of vibration reduction and isolation and safety protection of ship mechanical equipment, in particular to a safety protection system of a ship vibration isolation device.

Background

In order to control the vibration noise of ships, the vibration isolation of ship power system equipment and the like is basically carried out by using floating raft vibration isolation devices and the like at present. In order to realize a good vibration isolation effect, the lower layer of the floating raft vibration isolation device is provided with a low-frequency vibration isolator for multiple purposes. The current trend is that the frequency design of the lower layer vibration absorber of the buoyant raft vibration isolation device is lower and lower, the swing stability and the impact stability of the buoyant raft vibration isolation device are difficult to guarantee only by the vibration isolator, and usually, the buoyant raft vibration isolation device is additionally provided with a limiting system as a safety protection measure of the buoyant raft vibration isolation device and used for guaranteeing the stability and the safety of the buoyant raft vibration isolation device under the action of external additional loads such as swing and impact loads.

The limiting system of the existing buoyant raft vibration isolation device is generally a passive limiter, the limiting gap of the limiter is generally fixed, even if the limiting gap of part of the limiter is adjustable, the initial adjustment of the limiting gap of the limiter can be carried out only in the installation stage of a slipway, and the later adjustment can not be carried out any more or is difficult to adjust. Therefore, the traditional passive limiting system has the following problems that firstly, the floating raft vibration isolation device is widely applied to various submergence devices, the design submergence depth of the current submergence devices is continuously increased, the large submergence depth can bring large deformation of a hull of the submergence device, the floating raft vibration isolation device is basically installed on the hull by using a limiting system, the hull deformation caused by the submergence depth can change the limiting gap of a limiting device in the limiting system, the limiting system generally comprises a plurality of limiting devices, the hull deformation difference of the installation position of each limiting device is large, the change of the limiting gap of each limiting device of the limiting system caused by the hull deformation caused by the submergence depth is different everywhere, the limiting gap of each limiting device can cause the failure of the limiting system, and meanwhile, when the limiting gap is reduced to zero, acoustic short circuit can be generated, and further the failure of the floating raft vibration isolation device can be caused; secondly, when the ship is sailed on the water surface, the ship body can periodically swing under the condition of high sea, so that the floating raft vibration isolation device and the power equipment on the floating raft vibration isolation device are driven to periodically swing, and the ship body, the floating raft vibration isolation device and the power equipment on the floating raft vibration isolation device are not synchronously swung, so that the operation safety of the power equipment on the floating raft vibration isolation device can be influenced, and the problem is more obvious especially when the power equipment with the shaft centering requirement is provided; therefore, a new safety protection system for the buoyant raft vibration isolation device, which is adaptive to the deformation of the hull, is needed to be provided for the defects of the limiting system of the buoyant raft vibration isolation device.

Disclosure of Invention

In view of this, the invention provides a safety protection system for a ship vibration isolation device, which can adapt to deformation of a ship body, limit or lock a floating raft vibration isolation device, and ensure that the ship vibration isolation device meets safety requirements in a ship design submerged range and under a high sea condition on the water surface.

The technical scheme of the invention is as follows: a safety protection system for a marine vibration isolation device, the safety protection system comprising: the system comprises a central controller, and an X-direction protection subsystem, a Y-direction protection subsystem and a Z-direction protection subsystem which are connected with the central controller; the X-direction protection subsystem, the Y-direction protection subsystem and the Z-direction protection subsystem are respectively arranged on a bulkhead wall of the hull structure and respectively correspond to the X direction, the Y direction and the Z direction of the ship vibration isolation device; the X-direction protection subsystem can limit or lock and protect the X-direction oblique displacement of the ship vibration isolation device, the Y-direction protection subsystem can limit or lock and protect the Y-direction oblique displacement of the ship vibration isolation device, and the Z-direction protection subsystem can limit and lock and protect the Z-direction oblique displacement of the ship vibration isolation device.

Preferably, the X-direction protection subsystem, the Y-direction protection subsystem and the Z-direction protection subsystem have the same structure and respectively include four protection units, the four protection units in the X-direction protection subsystem are respectively arranged in the X-direction on the port and starboard sides at the bow and the stern of the hull structure, the four protection units in the Y-direction protection subsystem are respectively arranged in the Y-direction on the port and starboard sides at the bow and the stern of the hull structure, and the four protection units in the Z-direction protection subsystem are respectively arranged in the Z-direction on the port and starboard sides at the bow and the stern of the hull structure.

Preferably, the ship vibration isolation device adopts a floating raft vibration isolation device.

Preferably, the four protection units in each protection subsystem have the same structure, and each protection unit includes: the device comprises a hydraulic cylinder, a displacement sensor, an action mechanism and a plane sliding device;

the hydraulic cylinder is arranged on a bulkhead wall of the hull structure, one end of the actuating mechanism is arranged in the hydraulic cylinder, the other end of the actuating mechanism faces the buoyant raft vibration isolation device, the end part of the end is connected with the planar sliding device, and the displacement sensor is arranged on the end face of one end of the hydraulic cylinder, which is opposite to the buoyant raft vibration isolation device, and is used for detecting the inclined displacement of the buoyant raft vibration isolation device relative to the set direction of the hull structure and transmitting the inclined displacement to the central controller; when the inclination displacement is larger than a set value, the central controller controls the hydraulic cylinder to drive the actuating mechanism to extend out, so that the plane sliding device at the end part of the actuating mechanism contacts or presses the floating raft vibration isolation device, and the set direction of the floating raft vibration isolation device is limited or locked.

Preferably, each protection unit further comprises: a stop block; and a stop block is arranged on the outer surface of one end of the action mechanism extending into the hydraulic cylinder and used for limiting the action mechanism after extending outwards to a set position.

Preferably, the planar sliding device is detachably connected with the end part of the actuating mechanism.

Preferably, the planar sliding device includes: base, bottom plate and positioning spring, the pedestal mounting is equipped with the recess in the actuating mechanism tip, its one side towards the buoyant raft vibration isolation mounting, and the bottom plate both sides are passed through positioning spring and are supported in the base on two relative inside walls of recess, and bottom surface sliding fit in the recess of spherical structure and base more than two is passed through to one end, and the other end is towards the buoyant raft vibration isolation mounting.

Preferably, the planar sliding apparatus further comprises: and the buffer block is arranged at the end part of the base opposite to the buoyant raft vibration isolation device and is used for buffering the contact between the base and the buoyant raft vibration isolation device.

Has the advantages that:

1. the safety protection system can adapt to deformation of the ship body in a self-adaptive mode, limit or lock the floating raft vibration isolation device, namely lock and protect the floating raft vibration isolation device when the ship is in a high-sea-condition state of water surface navigation or a high-navigation-speed state under water, limit and protect the floating raft vibration isolation device when the ship is in a low-noise state of water surface or low-working-condition under water, and can realize automatic switching between the two protection states.

2. The three-way protection subsystems in the safety protection system have the same structure and respectively comprise four protection units, and the multi-direction self-adaptive ship body deformation can be realized, so that the ship vibration isolation device is limited or locked, the interchangeability among the protection units can be enhanced, and the integral installation is facilitated.

3. The specific arrangement of each protection unit in the invention has a simple structure, and can accurately limit or lock the ship vibration isolation device (floating raft vibration isolation device).

4. The arrangement of the stop block can limit the extending length of the action mechanism relative to the hydraulic cylinder, so that the safety and reliability of the whole safety protection system can be further ensured.

5. The plane sliding device can be in contact with or pressed against the floating raft vibration isolation device, and can slide on the floating raft vibration isolation device within a set small range, so that the self-adaptive ship deformation capacity of the safety protection system is enhanced.

Drawings

FIG. 1 is a hierarchy of components of the security system of the present invention.

Fig. 2 is a layout view of the safety protection system of the present invention, (1) a top view, and (2) a left side view.

Fig. 3 is a schematic structural diagram of a protection unit according to the present invention.

The floating raft vibration isolation device comprises a ship body structure 1, a hydraulic cylinder 2, a stop block 3, an oil inlet 4, an oil outlet 5, a displacement sensor 6, an action mechanism 7, a base 8, a bottom plate 9, a buffer block 10, a positioning spring 11 and a floating raft vibration isolation device 12.

Detailed Description

The invention is described in detail below by way of example with reference to the accompanying drawings.

The embodiment provides a safety protection system of boats and ships vibration isolation mounting, can the self-adaptation hull warp to can carry out spacing or locking to buoyant raft vibration isolation mounting, guarantee that vibration isolation mounting for boats and ships all accords with the security requirement under the deep within range of boats and ships design dive and the high sea condition of surface of water.

The relative movement of the buoyant raft vibration isolation device 12 relative to the hull structure 1 is three-directional (X-direction, Y-direction and Z-direction), and the external load which may be applied to the buoyant raft vibration isolation device is also three-directional, so that a three-directional decoupling concept is adopted, and a safety protection system is arranged on the buoyant raft vibration isolation device 12, and the safety protection system is independently arranged in three directions;

as shown in fig. 1, the security protection system includes: the system comprises a central controller, and an X-direction protection subsystem, a Y-direction protection subsystem and a Z-direction protection subsystem which are connected with the central controller; as shown in fig. 2, the X-direction protection subsystem, the Y-direction protection subsystem and the Z-direction protection subsystem are respectively installed on the bulkhead of the hull structure 1 and respectively correspond to the X-direction, the Y-direction and the Z-direction of the buoyant raft vibration isolation device 12 (installed in the hull structure 1); the X-direction protection subsystem, the Y-direction protection subsystem and the Z-direction protection subsystem are different in installation direction, have the same structure and respectively comprise four protection units, the four protection units in the X-direction protection subsystem are respectively arranged in the X directions of the port and the starboard at the bow and the stern of the ship body structure 1, the four protection units in the Y-direction protection subsystem are respectively arranged in the Y directions of the port and the starboard at the bow and the stern of the ship body structure 1, and the four protection units in the Z-direction protection subsystem are respectively arranged in the Z directions of the port and the starboard at the bow and the stern of the ship body structure 1;

taking a Y-direction protection subsystem as an example, the Y-direction protection subsystem only carries out Y-direction limiting or locking in real time and is decoupled from the X direction and the Z direction; the Y-direction protection subsystem comprises: four protection units, which have the same structure and are distributed at four corners of the XOZ plane on the buoyant raft vibration isolation device 12, as shown in fig. 3, one of the protection units is taken as an example for description, and the protection units include: the device comprises a hydraulic cylinder 2, a stop block 3, a displacement sensor 6, an action mechanism 7 and a plane sliding device;

the hydraulic cylinder 2 is arranged on a bulkhead of the hull structure 1, one end of the actuating mechanism 7 is arranged in the hydraulic cylinder 2 and serves as a hydraulic rod of the hydraulic cylinder 2, the other end of the actuating mechanism faces the buoyant raft vibration isolation device 12, the end part of the end is detachably connected with a plane sliding device, and the displacement sensor 6 is arranged on the end face, opposite to the buoyant raft vibration isolation device 12, of the hydraulic cylinder 2 and used for detecting the Y-direction inclined displacement of the buoyant raft vibration isolation device 12 relative to the hull structure 1;

the outer surface of one end, extending into the hydraulic cylinder 2, of the action mechanism 7 is provided with a stop block 3 for limiting the action mechanism 7 after extending outwards to a set position; the plane sliding device includes: the base 8 is detachably mounted at the end part of the action mechanism 7 through bolts, a groove is formed in one side, facing the floating raft vibration isolation device 12, of the action mechanism, two sides of the base 9 are supported on two opposite inner side walls of the groove in the base 8 through the positioning springs 11, one end of the base is in sliding fit with the inner bottom surface of the groove of the base 8 through more than two spherical structures, the other end of the base faces the floating raft vibration isolation device 12, and the buffer block 10 is arranged at the end part, opposite to the floating raft vibration isolation device 12, of the base 8 and is used for buffering the contact of the base 8 and the floating raft vibration isolation device 12;

when the submerged depth of the ship changes, the relative position between the hull structure 1 and the buoyant raft vibration isolation device 12 changes, and the change is used as input to be provided to a central controller of a safety protection system; the central controller drives an external hydraulic source to input hydraulic oil into the hydraulic cylinder 2 or extract the hydraulic oil from the hydraulic cylinder 2 according to parameters such as the state of ship navigation, the external environment, the inclined displacement and the like, so that Y-direction extension or retraction of the action mechanism 7 is controlled, Y-direction locking or limiting of the floating raft vibration isolation device 12 can be realized when the action mechanism 7 extends along the Y direction, and Y-direction unlocking or limiting releasing of the floating raft vibration isolation device 12 can be realized when the action mechanism 7 retracts along the Y direction; meanwhile, in a locking protection state, the protection unit can realize plane sliding between the contact surfaces of the action mechanism 7 and the buoyant raft vibration isolation device 12; the hydraulic cylinder 2 is provided with an oil inlet 4 and an oil outlet 5, when oil is fed, the internal pressure of the hydraulic cylinder 2 is increased, the pushing action mechanism 7 extends out of the hydraulic cylinder 2, and when oil is discharged, the internal pressure of the hydraulic cylinder 2 is reduced, so that the action mechanism 7 can retract into the hydraulic cylinder 2; the central controller has a built-in control program for driving the external hydraulic pressure source to input hydraulic oil to the hydraulic cylinder 2 according to the tilt displacement amount inputted thereto by the displacement sensor 6, thereby controlling the Y-direction extension of the operating mechanism 7.

Taking the Y-direction protection subsystem as an example, the working principle of the safety protection system is explained as follows:

1. water surface state

a) Locking the water surface: when a ship floats on the water surface, the floating raft vibration isolation device 12 is in a zero position state, the action mechanisms 7 in all protection units of the Y-direction protection subsystem extend to the maximum stroke (limited by the internal stop block 3) from the hydraulic cylinder 2, the bottom plate 9 in the plane sliding device is in rigid contact with the floating raft vibration isolation device 12 (the buffer block 10 is compressed), the floating raft vibration isolation device 12 is symmetrically extruded by the protection units on the left side and the right side of the ship body structure 1 by adjusting the opening and closing of the oil inlet 4 and the oil outlet 5 of the hydraulic cylinder 2, and the floating raft vibration isolation device 12 cannot move in the Y direction relative to the ship body due to the incompressibility of hydraulic oil in the water surface rolling state, so that the floating raft vibration isolation device 12 is locked in the Y direction;

b) limiting the water surface: the actuating mechanisms 7 in each protection unit of the Y-direction protection subsystem extend from the hydraulic cylinder 2 to a buffer block 10 in the plane sliding device and are in contact with the buoyant raft vibration isolation device 12 but not compressed, and the state is a limiting initial device and can play a role in limiting in the Y direction; the contact surface between the bottom plate 9 in the plane sliding device of the protection unit and the buoyant raft vibration isolation device 12 can freely slide so as to adapt to relative displacement in the X direction and the Z direction between the hull structure 1 and the buoyant raft vibration isolation device 12;

c) through the oil inlet and the oil outlet of the adjusting hydraulic cylinder 2, the locking state and the limiting state can be freely switched, and the switching time is less than 3 seconds.

2. Underwater state

a) Locking state I under water: when the ship submerges without a transverse inclination angle in a water surface locking state, the pressure value of overpressure protection is preset in the inner cavity of the action mechanism 7 of each protection unit of the Y-direction protection subsystem to be P0, when the ship body structure 1 deforms and extrudes in the Y direction, the pressure of the inner cavity of the action mechanism 7 exceeds the overpressure protection pressure P0, the hydraulic cylinder 2 overflows, and the floating raft vibration isolation device 12 is still in the Y-direction locking state; at the moment, a bottom plate 9 in a plane sliding device of the actuating mechanism 7 is in rigid contact with a buoyant raft vibration isolation device 12, so that the relative displacement between the hull structure 1 and the buoyant raft vibration isolation device 12 in the X direction and the Z direction can be adapted;

b) and (5) underwater locking state II: when the ship dives at a roll angle in a locked state on the water surface, an overpressure protection pressure value P preset in an inner cavity of an actuating mechanism 7 of a port side protection unit arranged on a hull structure 1 is P0+ (P1), and is marked as P1; an overpressure protection pressure value P is preset in an inner cavity of an action mechanism 7 of the starboard side protection unit of the ship body structure 1 and is P0+ (P2) and is marked as P2; wherein, v P1 and v P2 are calculated according to the lateral additional force generated by the raft vibration isolation device 12 in a heeling state; if the ship is in a left heeling state, v P1 is a positive value (lateral component force for balancing the gravity of the buoyant raft vibration isolation device 12 and equipment thereon), v P2 is zero, otherwise v P2 is a positive value, and v P1 is zero; finally, the Y-direction load of the buoyant raft vibration isolation device 12 can be balanced under the condition that the Y-direction additional righting load is not required to be provided by the lower-layer vibration absorber, so that the buoyant raft vibration isolation device 12 is in a zero-position locking state; a bottom plate 9 in a plane sliding device of the action mechanism 7 is in rigid contact with a floating raft vibration isolation device 12, and can adapt to relative displacement in the X direction and the Z direction between the hull structure 1 and the floating raft vibration isolation device 12;

c) limiting underwater: when a ship dives, a dive depth signal and a displacement signal measured by a displacement sensor 6 are introduced to determine retraction displacement of an action mechanism 7, when the transverse deformation of the ship body structure 1 is larger than 0.2mm, the action mechanism 7 retracts to a specified position in a hydraulic cylinder 2 to adapt to Y-direction deformation of the ship body structure 1 caused by the dive depth, and after the retraction is finished, an oil inlet 4 and an oil outlet 5 of the hydraulic cylinder 2 are closed; otherwise, the floating movement mechanism 7 extends out of the hydraulic cylinder 2 by a set length;

d) the underwater locking state I or the underwater locking state II is switched to be limited underwater: the action mechanism 7 retracts from a locking state, and the retraction amount is determined according to a submergence depth signal and a displacement signal measured by the displacement sensor 6; the ship continues to dive/float, when the Y-direction deformation of the ship body structure 1 is larger than 0.2mm, the action mechanism 7 retracts/extends relative to the hydraulic cylinder 2, and after the action is finished, the oil inlet 4 and the oil outlet 5 of the hydraulic cylinder 2 are closed to adapt to the Y-direction deformation of the ship body structure 1 caused by the diving depth;

e) the underwater limiting state is switched to an underwater locking state I: the action mechanism 7 arranged in the protection unit on the port and the starboard of the ship hull structure 1 extends out of the floating raft vibration isolation device 12 and keeps a certain pressure P0, and a constant pressure P0 is kept in the floating/submerging process so as to adapt to the Y-direction deformation of the hull structure 1 caused by the submerging depth and keep a constant clamping force on the floating raft vibration isolation device 12;

f) the underwater limiting state is switched to an underwater locking state II: the operating mechanism 7 arranged in the protection unit on the port and starboard side of the ship hull structure 1 extends out of the top floating raft vibration isolation device 12, the overpressure protection pressure value preset in the inner cavity of the operating mechanism 7 in the port side protection unit is P1, the overpressure protection pressure value preset in the inner cavity of the operating mechanism 7 in the starboard side protection unit is P2, and if the transverse inclination angle is unchanged, P1 and P2 are kept constant in the floating/submerging process; if the transverse inclination angle changes, adjusting the values of P1 and P2;

through the above strategies, each protection unit of the Y-direction protection subsystem can adapt to the three-direction deformation of the ship hull structure 1 caused by the submergence depth, and the buoyant raft vibration isolation device 12 is locked or limited, so that the Y-direction safety protection of the buoyant raft vibration isolation device is realized.

The working principle of the X-direction protection subsystem and the Z-direction protection subsystem is similar to that of the Y-direction protection subsystem.

Under the common control of the X-direction protection subsystem, the Y-direction protection subsystem and the Z-direction protection subsystem, the whole system can be freely switched under two working states of locking or limiting safety protection, and can adapt to additional loads caused by the swinging and the inclination of a ship body and the deformation of the ship body caused by the submergence depth.

Furthermore, the safety protection system can be matched with a floating raft vibration isolation device and can also be matched with an elastically-mounted large unit for use.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.