A water-lubricated cooling circulation system for a marine stern shaft

Abstract

The application discloses a water-lubricated cooling circulation system for a ship stern shaft and relates to the technical field of cooling circulation, which comprises a water cooling device, a water tank main body connected to the bottom of a rack, a water supplement tank installed at the top end of the water tank main body, a circulating water pump installed at the top end of the water tank main body, a self-adjusting water pumping device connected to the water inlet of the circulating water pump, and an elastic plugging device installed in the interior of the water tank main body and in communication with the inner cavity of the water supplement tank. The elastic positioning mechanism is limited, so that the plugging head keeps the state of not plugging the inner cavity of the water outlet pipe, the water in the inner cavity of the water supplement tank can flow into the inner cavity of the water tank main body through the elastic plugging device, and the normal operation of the equipment is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cooling circulation, in particular to a water lubrication cooling circulation system for a ship stern shaft. BACKGROUND

[0002] The ship stern shaft is a core component of power transmission of the ship, and a large amount of heat is generated during the operation of the ship stern shaft. The sealing performance and operation stability of the ship stern shaft need to be ensured by a lubrication cooling system. Therefore, the reliability of the lubrication cooling system directly affects the safety of the ship. At present, the lubrication cooling system of the ship stern shaft generally adopts an open circulation structure. That is, seawater or river water is directly pumped into the sealing device in the stern shaft pipe by a water pump to complete the lubrication and cooling of the stern shaft and the sealing element, and then the water is directly discharged back to the natural environment. Seawater has strong corrosiveness. After being directly introduced into the stern shaft pipe, it can cause serious corrosion to metal and non-metal elements such as sealing elements and shaft sleeves, thereby accelerating the failure of the elements and greatly shortening the service life of the elements. River water (such as water in the Yangtze River area) contains a large amount of particles such as silt and suspended impurities. These impurities will cause strong wear to the water pump impeller, the sealing surface and the surface of the stern shaft when they enter the system with the water flow, further aggravate the damage of the elements, and eventually lead to short service life of the system, high maintenance frequency, and high maintenance cost and loss.

[0003] Therefore, in the prior art, a water tank is generally used to store fresh water, and a water pump is used to pump the water in the water tank for water lubrication and cooling of the ship stern shaft. The existing system lacks self-adaptive adjustment capability for water loss. The sealing surface is prone to wear and leakage under the condition of long-term high-speed rotation and high pressure of the stern shaft pipe. Once water leakage occurs, the water pump cannot adjust the pumping rate according to the water level change, which leads to rapid loss of the cooling and lubrication water, resulting in not only waste of water resources but also rapid reduction of the lubrication and cooling effect in the stern shaft pipe.

[0004] The existing system has no automatic water replenishment function. After the water level drops due to water leakage, manual water replenishment is needed, and the response lag is strong. If the water is not replenished in time, the water in the stern shaft pipe will continue to decrease, and effective lubrication and cooling circulation cannot be formed, which may cause problems such as rapid temperature rise of the stern shaft, dry friction burnout and failure of the sealing element, and even cause the stern shaft to be stuck and the power transmission to be interrupted, thereby directly threatening the safety of the ship. SUMMARY

[0005] The present application provides a water lubrication cooling circulation system for a ship stern shaft to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a water lubrication cooling circulation system for a ship stern shaft, comprising:

[0007] a water cooling device;

[0008] a water tank body connected to the bottom of the frame;

[0009] a water replenishing tank installed at the top end of the water tank body;

[0010] a circulating water pump installed at the top end of the water tank body;

[0011] a self-adjusting water pumping device connected to the water inlet of the circulating water pump;

[0012] a flexible sealing device installed inside the water tank body and connected to the inner cavity of the water replenishing tank.

[0013] Preferably, the water cooling device comprises:

[0014] a frame;

[0015] a filter connected to the water tank body through a pipeline;

[0016] a cooler installed at the top end of the water tank body;

[0017] an electric control cabinet installed on the front of the frame.

[0018] Preferably, the self-adjusting water pumping device comprises:

[0019] a flow self-adjusting mechanism connected to the water inlet of the circulating water pump at one end;

[0020] a water pumping pipe connected to the bottom end of the flow self-adjusting mechanism;

[0021] a rotating support connected to the flow self-adjusting mechanism at one end;

[0022] a floating ball connected to the other end of the rotating support.

[0023] Preferably, the flow self-adjusting mechanism comprises:

[0024] a connecting cylinder with the top and bottom thereof in a through state;

[0025] an adjusting assembly movably arranged inside the connecting cylinder;

[0026] a linkage assembly connected between the adjusting assembly and the rotating support, the linkage assembly being used for power transmission.

[0027] Preferably, the adjusting assembly comprises:

[0028] A flow regulating pipe is slidingly sleeved in the inner part of the connecting cylinder, and a plurality of regulating holes are arranged in an annular array at the bottom of the flow regulating pipe;

[0029] A blocking cover is connected to the end of the flow regulating pipe, and is used for blocking the end of the flow regulating pipe;

[0030] A guide pipe is fixedly installed at the top of the inner cavity of the connecting cylinder, and the guide pipe is slidingly sleeved with the flow regulating pipe;

[0031] A sealing ring is fixedly installed at the inner part of the connecting cylinder and the outer part of the guide pipe.

[0032] Preferably, the linkage assembly comprises:

[0033] A rack is connected to one side of the flow regulating pipe;

[0034] A gear is engagedly connected with the rack;

[0035] A rotating shaft is rotatably and penetratingly connected with the connecting cylinder, and the rotating shaft is also fixedly and penetratingly connected with the gear and the rotating support.

[0036] Preferably, the elastic blocking device comprises:

[0037] An elastic blocking assembly is installed at the top of the inner cavity of the water tank body;

[0038] A traction rope is connected at one end with the elastic blocking assembly, and is connected at the other end with the rotating support;

[0039] A mounting ring seat is fixedly installed at the outer part of the elastic blocking assembly;

[0040] An unlocking mechanism is installed at the inner part of the mounting ring seat through a supporting rod, and is used for limiting the elastic blocking assembly.

[0041] Preferably, the elastic blocking assembly comprises:

[0042] A water outlet pipe is fixedly installed at the top of the inner cavity of the water tank body, and the water outlet pipe is in communication with the inner cavity of the water supplement tank;

[0043] A blocking head is movably fitted in the inner cavity of the water outlet pipe, and is used for one-way blocking of the inner cavity of the water outlet pipe;

[0044] A first spring is connected between the blocking head and the unlocking mechanism;

[0045] The penetrating rod is movably sleeved in the first spring, and one end of the penetrating rod is connected with the traction rope.

[0046] The elastic positioning mechanism is installed in the penetrating rod.

[0047] Preferably, the elastic positioning mechanism comprises:

[0048] The second spring is arranged in the cavity of the penetrating rod.

[0049] The spring seat is connected to the two ends of the second spring.

[0050] The one-way positioning block is connected with the spring seat, and the one-way positioning block is slidably connected with the penetrating rod.

[0051] Preferably, the unlocking mechanism comprises:

[0052] The limiting ring is fixedly installed in the installation ring seat through the supporting rod, and the limiting ring is provided with a clamping groove matched with the one-way positioning block.

[0053] The fixing ring is fixedly installed at the bottom of the limiting ring.

[0054] The guide block is fixedly installed in the fixing ring.

[0055] The extrusion ring is movably sleeved in the fixing ring, and the guide block is slidably connected with the extrusion ring.

[0056] The technical effects and advantages of the present application are as follows:

[0057] (1) The self-adjusting water pumping device and the elastic sealing device are matched and arranged, when the stern tube leaks, the water level in the water tank body decreases, in this process, the float moves downward with the liquid surface, the relative position between the rotating shaft, the gear and the rotating support is synchronously connected, the rotation of the rotating support can synchronously drive the clockwise rotation of the gear, the mutual meshing between the rack and the gear is achieved, so that the rotation of the gear can drive the linear motion of the rack, the flow regulating pipe slides towards the guide pipe, so that the number of regulating holes allowing water to pass through is gradually reduced, so that the flow of the self-adjusting flow regulating pipe is reduced while the liquid level is lowered, so as to slow down the water loss and gain time for water replenishment of the water tank body.

[0058] (2) the present application utilizes the setting mode that the self-adjusting water pumping device and the elastic sealing device cooperate, when the water surface drops to a certain position, the downward fixed shaft rotation of the rotating support is accompanied, so that the rotating support will pull down the penetrating rod, at this time, the elastic positioning mechanism is separated from the clamping groove, and is limited below the limiting ring, through the limiting of the elastic positioning mechanism, the sealing head will keep the state of not sealing the water outlet pipe cavity, the water in the water tank cavity can flow into the inner cavity of the water tank main body through the elastic sealing device, ensure the normal operation of the equipment, when the water replenishment is completed, the water surface is high to a certain degree, the rotating support rotates upward, the extrusion ring is extruded upward, the upward movement of the extrusion ring extrudes the one-way positioning block inward, extrudes the one-way positioning block to the inside of the penetrating rod, realizes the unlocking of the relative position of the limiting ring and the penetrating rod, through the elastic support of the first spring to the sealing head, the sealing head moves upward to its original position, realizes the sealing of the water outlet pipe, completes the automatic water replenishment process. BRIEF DESCRIPTION OF DRAWINGS

[0059] The accompanying drawings are included to provide a further understanding of the application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application, and together with the description serve to explain the principles of the application, and should not be taken as limiting the application, in the drawings:

[0060] Figure 1 It is the overall structure schematic diagram of the present application;

[0061] Figure 2 It is the internal overhead structure schematic diagram of the present application;

[0062] Figure 3 It is the internal side structure schematic diagram of the water tank main body of the present application;

[0063] Figure 4 It is the side structure schematic diagram of the self-adjusting water pumping device of the present application;

[0064] Figure 5 It is the internal structure schematic diagram of the flow self-adjusting mechanism of the present application;

[0065] Figure 6 It is the internal structure schematic diagram of the guide pipe of the present application;

[0066] Figure 7 It is the internal structure schematic diagram of the elastic sealing device of the present application;

[0067] Figure 8 It is the internal structure schematic diagram of the unlocking mechanism of the present application.

[0068] In the drawings:

[0069] 100, rack; 200, water tank body; 300, water supplement tank; 400, circulating water pump; 500, filter; 600, cooler; 700, electric control cabinet; 800, self-adjusting water pumping device; 801, flow self-adjusting mechanism; 811, connecting cylinder; 812, flow adjusting pipe; 813, plugging cover; 814, guide pipe; 815, sealing ring; 816, rack gear; 817, gear; 818, rotating shaft; 802, water pumping pipe; 803, rotating support; 804, floating ball; 900, elastic plugging device; 901, water outlet pipe; 902, plugging head; 903, first spring; 904, penetrating rod; 905, elastic positioning mechanism; 951, second spring; 952, spring seat; 953, one-way positioning block; 906, traction rope; 907, mounting ring seat; 908, unlocking mechanism; 981, limiting ring; 982, fixed ring; 983, guide block; 984, extrusion ring. DETAILED DESCRIPTION

[0070] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0071] The present application provides a water lubrication cooling circulation system for a ship stern shaft, as shown in Figures 1-8 The present application provides a water lubrication cooling circulation system for a ship stern shaft, as shown in

[0072] The water cooling device comprises a rack 100, a filter 500 connected with the water tank body 200 through a pipeline, a cooler 600 installed at the top end of the water tank body 200, and an electric control cabinet 700 installed at the front of the rack 100. The filter 500 is used to filter the circulating water, so that the water is cleaner. The cooler 600 is used to cool the circulating water when the temperature of the circulating water is too high. The water supplement tank 300 is provided with a liquid level meter. The electric control cabinet 700 is provided with an alarm. When the liquid level in the water supplement tank 300 is lower than the position of the liquid level meter, the alarm will send an alarm to prompt the staff to supplement water to the water supplement tank 300.

[0073] The self-adjusting water pumping device 800 comprises a flow self-adjusting mechanism 801 connected with the water inlet of the circulating water pump 400, a water pumping pipe 802 connected with the bottom end of the flow self-adjusting mechanism 801, a rotating support 803 connected with one end of the flow self-adjusting mechanism 801, and a floating ball 804 connected with the other end of the rotating support 803. The flow self-adjusting mechanism 801 is used to adjust the water pumping amount of the circulating water pump 400. The rotating support 803 and the floating ball 804 are matched with each other through a rotating shaft 818. The floating ball 804 floats on the liquid surface of the water tank body 200. When the liquid surface moves downward, the floating ball 804 also moves downward, so as to drive the rotating support 803 to rotate. The rotating support 803 drives the rotating shaft 818 to rotate and pulls the traction rope 906.

[0074] Specifically, the flow self-regulating mechanism 801 includes: a connecting cylinder 811, with its top and bottom connected; an adjusting component movably disposed inside the connecting cylinder 811; and a linkage component connected between the adjusting component and the rotating bracket 803, used for power transmission. The adjusting component includes: a flow regulating pipe 812, slidably sleeved inside the connecting cylinder 811, with multiple adjusting holes arranged in a ring at its bottom; a sealing cap 813, connected to the end of the flow regulating pipe 812, used to seal the end of the flow regulating pipe 812; a guide pipe 814, fixedly installed at the top of the inner cavity of the connecting cylinder 811, slidingly sleeved with the flow regulating pipe 812; and a sealing ring 815, fixedly installed inside the connecting cylinder 811 and outside the guide pipe 814. The linkage assembly includes: a rack 816 connected to one side of the flow regulating pipe 812; a gear 817 meshing with the rack 816; and a rotating shaft 818 rotatably connected to the connecting cylinder 811, and simultaneously fixedly connected to the gear 817 and the rotating bracket 803. When the water level in the inner cavity of the water tank body 200 is high, the flow regulating pipe 812 is in its initial state relative to the connecting cylinder 811 at the lower limit. At this time, all the adjustment holes at the bottom of the flow regulating pipe 812 are located below the sealing ring 815 on the connecting cylinder 811, and water can enter the inner cavity of the flow regulating pipe 812 through all the adjustment holes. At this time, the pumping capacity of the circulating water pump 400 is at its maximum. When water leaks into the stern pipe, the water level in the water tank body 200 drops, accompanied by... As the water level in the main body of the water tank 200 drops, the float 804 moves downwards accordingly. Through the synchronous connection of the relative positions of the rotating shaft 818, gear 817, and rotating bracket 803, the rotation of the rotating bracket 803 synchronously drives the gear 817 to rotate clockwise. Through the meshing between the rack 816 and gear 817, the rotation of gear 817 pushes the rack 816 to move linearly, causing the flow regulating pipe 812 to slide towards the guide pipe 814. This gradually reduces the number of regulating holes that allow water to pass through, thus reducing the flow rate pumped by the flow regulating mechanism 801 while the water level drops, slowing water loss and giving the main body of the water tank 200 time to replenish water. When the flow regulating pipe 812 moves upwards to... Figure 5The upper limit position shown, the flow regulating pipe 812 still has a part of the regulating hole exposed below the sealing ring 815 for the passage of lubricating water to ensure the minimum flow of lubricating water, further ensure the lubrication effect, through the movable sleeve joint between the flow regulating pipe 812 and the guide pipe 814, facilitate the sliding of the flow regulating pipe 812 to guide the straight line sliding of the flow regulating pipe 812 more stably, also facilitate the water to be guided, so that the water can be discharged through the circulating water pump 400, through the sealing ring 815 installed on the connecting cylinder 811, facilitate the sealing of the gap between the connecting cylinder 811 and the flow regulating pipe 812, so that the water can only enter the inside of the flow regulating pipe 812 along the arrow as shown Figure 5 The arrow shown, through the cooperation between the rack 816 and the gear 817, so as to facilitate the conversion of the movement mode, convert the rotary motion into linear motion, realize the regulation of flow.

[0075] Among them, the elastic plugging device 900 includes: an elastic plugging assembly installed at the top of the inner cavity of the water tank body 200; a traction rope 906, one end of the traction rope 906 is connected with the elastic plugging assembly, the other end of the traction rope 906 is connected with the rotating support 803; a mounting ring seat 907 is fixedly installed on the outside of the elastic plugging assembly; an unlocking mechanism 908 is installed in the inside of the mounting ring seat 907 through a supporting rod, the unlocking mechanism 908 is used for limiting the elastic plugging assembly, when the water surface drops to a certain position, the rotating support 803 is downwardly fixedly rotated, so that the rotating support 803 will downwardly pull the penetrating rod 904, at this time the elastic positioning mechanism 905 is separated from the clamping groove and is limited below the limiting ring 981, through the limiting of the elastic positioning mechanism 905, the plugging head 902 will keep the state of not plugging the inner cavity of the water outlet pipe 901, the water in the inner cavity of the water supplement tank 300 can flow into the inner cavity of the water tank body 200 through the elastic plugging device 900, to ensure the normal operation of the equipment, when the water supplement is completed and the water surface is high to a certain extent, the rotating support 803 is upwardly rotated to upwardly press the extrusion ring 984, so that the upward movement of the extrusion ring 984 inwardly presses the one-way positioning block 953, the one-way positioning block 953 is pressed into the inside of the penetrating rod 904, to realize the unlocking of the relative position between the limiting ring 981 and the penetrating rod 904, through the elastic support of the first spring 903 to the plugging head 902, the plugging head 902 moves upwardly to its original position, to realize the sealing of the water outlet pipe 901, to complete the automatic water supplement process.

[0076] The elastic plugging assembly comprises: a water outlet pipe 901 fixedly installed at the top of the inner cavity of the water tank main body 200, and the water outlet pipe 901 is in communication with the inner cavity of the water supplement tank 300; a plugging head 902 movably fitted in the inner cavity of the water outlet pipe 901, the plugging head 902 is used for one-way plugging of the inner cavity of the water outlet pipe 901; a first spring 903 connected between the plugging head 902 and an unlocking mechanism 908; a penetrating rod 904, one end of the penetrating rod 904 is fixedly connected with the plugging head 902, the penetrating rod 904 is movably sleeved in the first spring 903, the other end of the penetrating rod 904 is connected with a traction rope 906; and an elastic positioning mechanism 905 installed in the penetrating rod 904, the plugging head 902 is convenient for plugging the bottom of the inner cavity of the water outlet pipe 901, so as to prevent the loss of liquid when the water supplement tank 300 does not supplement the inner cavity of the water tank main body 200, the first spring 903 is convenient for elastic supporting of the plugging head 902, so that the plugging head 902 is tightly attached to the inner cavity of the water outlet pipe 901, the plugging of the inner cavity of the water outlet pipe 901 is realized, the sliding penetration between the penetrating rod 904 and the unlocking mechanism 908 makes the movement of the plugging head 902 more stable, the connection between the traction rope 906 and the rotating support 803 makes the downward rotation of the rotating support 803 to pull the traction rope 906, and the downward movement of the plugging head 902 is driven to remove the plugging of the inner cavity of the water outlet pipe 901.

[0077] The elastic positioning mechanism 905 comprises: a second spring 951, a cavity is formed in the inside of the penetrating rod 904, and the second spring 951 is assembled in the inside of the cavity; a spring seat 952, which is connected to the two ends of the second spring 951; a one-way positioning block 953, which is connected with the spring seat 952, and is slidingly and penetratingly connected with the penetrating rod 904, and is movably clamped with the unlocking mechanism 908, and a slope is formed in the bottom of the one-way positioning block 953, when the penetrating rod 904 is pulled downward by the traction rope 906, the one-way positioning block 953 also moves downward, so that the bottom end of the bottom of the clamping groove extrudes the slope on the one-way positioning block 953, through the component force, the one-way positioning block 953 is extruded into the inside of the penetrating rod 904, so as not to affect the normal downward movement of the penetrating rod 904, until the one-way positioning block 953 moves downward to the lower side of the limiting ring 981, at this time, no external force is applied, the one-way positioning block 953 is extruded out through the elastic support of the second spring 951, so that the one-way positioning block 953 is limited below the limiting ring 981, so as to keep the unblocking state of the plugging head 902, so that the water supplementing state is kept, until the liquid level rises to a certain height, the support 803 is rotated upward, the extruding ring 984 is pushed upward, so that the extruding ring 984 extrudes the slope of the one-way positioning block 953 again, the one-way positioning block 953 is extruded into the inside of the penetrating rod 904 again, and the plugging head 902 moves upward to be blocked through the elastic support of the first spring 903, and the water supplementing process is ended.

[0078] The unlocking mechanism 908 comprises: a limiting ring 981, which is fixedly installed in the inside of the mounting ring seat 907 through a support rod, and a clamping groove matched with the one-way positioning block 953 is formed in the inside of the limiting ring 981; a fixed ring 982, which is fixedly installed at the bottom of the limiting ring 981; a guide block 983, which is fixedly installed in the inside of the fixed ring 982; and an extruding ring 984, which is movably sleeved in the inside of the fixed ring 982, and the guide block 983 and the extruding ring 984 are slidingly and penetratingly connected, through the sliding cooperation between the guide block 983 and the extruding ring 984, so as to limit the sliding of the extruding ring 984, so that the extruding ring 984 has a certain upward space, and the extruding of the one-way positioning block 953 is facilitated.

[0079] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A water-lubricated cooling circulation system for a ship's stern shaft, characterized in that, include: Water cooling device; A water tank body (200) is connected to the bottom of the frame (100); A water replenishment tank (300) is installed on the top of the water tank body (200); A circulating water pump (400) is installed on the top of the water tank body (200); A self-adjusting pumping device (800) is connected to the inlet of a circulating water pump (400); An elastic sealing device (900) is installed inside the water tank body (200) and is connected to the inner cavity of the water replenishment tank (300). The self-adjusting pumping device (800) includes: A flow self-regulating mechanism (801) is provided, one end of which is connected to the inlet of a circulating water pump (400). A water pumping pipe (802) is connected to the bottom end of the flow self-regulating mechanism (801); A rotating bracket (803) is provided, one end of which is connected to the flow self-regulating mechanism (801). A float (804) is connected to the other end of a rotating bracket (803); The flow self-regulating mechanism (801) includes: Connecting cylinder (811), the top and bottom of the connecting cylinder (811) are in a through state; An adjustment component is movably disposed inside the connecting cylinder (811); A linkage component is connected between the adjustment component and the rotating bracket (803), and the linkage component is used for power transmission; The adjustment component includes: A flow regulating pipe (812) is slidably sleeved inside the connecting cylinder (811), and the bottom of the flow regulating pipe (812) is provided with multiple regulating holes in a ring array; A sealing cap (813) is connected to the end of the flow regulating pipe (812) and is used to seal the end of the flow regulating pipe (812); Guide tube (814), the guide tube (814) is fixedly installed on the top of the inner cavity of the connecting cylinder (811), and the guide tube (814) is slidably sleeved with the flow regulating tube (812); A sealing ring (815) is fixedly installed inside the connecting cylinder (811) and outside the guide tube (814); The linkage component includes: A rack (816) is connected to one side of the flow regulating tube (812); Gear (817), which meshes with rack (816); A rotating shaft (818) is rotatably interlocked with a connecting cylinder (811), and the rotating shaft (818) is also fixedly interlocked with a gear (817) and a rotating bracket (803).

2. The water-lubricated cooling circulation system for a ship's stern shaft according to claim 1, characterized in that, The water cooling device includes: Rack (100); A filter (500) is connected to the water tank body (200) via a pipe; A cooler (600) is mounted on top of the water tank body (200); Electrical control cabinet (700) is mounted on the front of the frame (100).

3. The water-lubricated cooling circulation system for a ship's stern shaft according to claim 1, characterized in that, The resilient sealing device (900) includes: An elastic sealing assembly is installed on the top of the inner cavity of the water tank body (200); A traction rope (906), one end of which is connected to an elastic sealing assembly, and the other end of which is connected to a rotating bracket (803); Mounting ring seat (907), which is fixedly mounted on the outside of the elastic sealing assembly; Unlocking mechanism (908), which is installed inside the mounting ring seat (907) by a support rod, is used to limit the position of the elastic sealing component.

4. The water-lubricated cooling circulation system for a ship's stern shaft according to claim 3, characterized in that, The resilient plugging assembly includes: Water outlet pipe (901) is fixedly installed on the top of the inner cavity of the water tank body (200), and the water outlet pipe (901) is connected to the inner cavity of the water replenishment tank (300); A plug (902) is movably fitted into the inner cavity of the water outlet pipe (901) and is used to unidirectionally plug the inner cavity of the water outlet pipe (901); The first spring (903) is connected between the sealing head (902) and the unlocking mechanism (908); Insertion rod (904), one end of which is fixedly connected to the sealing head (902), the insertion rod (904) is movably sleeved inside the first spring (903), and the other end of which is connected to the traction rope (906); An elastic positioning mechanism (905) is installed inside the insert rod (904).

5. A water-lubricated cooling circulation system for a ship's stern shaft according to claim 4, characterized in that, The elastic positioning mechanism (905) includes: The second spring (951) is installed inside the cavity of the insert rod (904); A spring seat (952) is connected to both ends of a second spring (951); One-way positioning block (953), the one-way positioning block (953) is connected to spring seat (952), the one-way positioning block (953) is slidably inserted into the insertion rod (904), and the one-way positioning block (953) is movably engaged with the unlocking mechanism (908).

6. A water-lubricated cooling circulation system for a ship's stern shaft according to claim 3, characterized in that, The unlocking mechanism (908) includes: A limiting ring (981) is fixedly installed inside the mounting ring seat (907) by a support rod. The limiting ring (981) has a slot inside that cooperates with the one-way positioning block (953). A fixing ring (982) is fixedly installed at the bottom of the limiting ring (981); Guide block (983), which is fixedly installed inside the fixing ring (982); The extrusion ring (984) is movably sleeved inside the fixed ring (982), and the guide block (983) is slidably inserted into the extrusion ring (984).

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