Vibration reduction mounting device of water jet propulsion system and water jet propulsion ship
By designing vibration-absorbing installation devices in the water jet propulsion system, including limit rings and buffer rings, the vibration problems caused by rigid connections during operation are solved, and effective vibration attenuation and service life are achieved.
Patent Information
- Application Number
- CN202510045225.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-05-06
AI Technical Summary
Due to the rigid connection method, the water jet propulsion system is subjected to strong water flow impact and violent vibration during operation, resulting in damage to the outer shell and shortening its service life.
A vibration-absorbing mounting device is designed, including a first limit ring, a second limit ring and a buffer ring. The buffer ring is located between and connected to the first limit ring and the second limit ring. The buffer ring can undergo elastic deformation to reduce vibrations caused by the outer shell.
Through the vibration-absorbing installation device, the vibration and impact of the water-spray propulsion system during operation is effectively attenuated, the service life of the outer shell is extended, and mechanical vibration and vibration noise are reduced.
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Figure CN119929134A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure belongs to the field of water jet propulsion technology, and in particular relates to a vibration reduction installation device of a water jet propulsion system and a water jet propulsion vessel. Background Art
[0002] A waterjet propulsion system is a marine propulsion device. Due to its simple structure and wide speed range, it has become the mainstream propulsion device for high-performance ships.
[0003] In related art, waterjet propulsion systems are generally connected to the hull via a rigid connection. The outer shell of the waterjet propulsion system is inserted into the inner hole of the hull's transom and connected to the transom via bolts or welding. A water inlet channel is formed within the outer shell of the waterjet propulsion system, with a water inlet at one end and a water outlet at the other. One end of the water inlet is connected to the hull's bottom plating via bolts or welding. The transom is connected perpendicularly to the bottom plating. During operation, the waterjet propulsion system continuously draws in and dispenses water.
[0004] However, because the waterjet is rigidly connected to the hull, the outer shell is subject to strong water flow impact or severe vibration when the water inlet channel continuously absorbs and sprays water. This vibration accelerates damage to the outer shell, thereby shortening the service life of the waterjet propulsion system. Summary of the Invention
[0005] The disclosed embodiments provide a vibration reduction installation device for a water jet propulsion system and a water jet propulsion vessel, which can reduce vibration and extend the service life of the water jet propulsion system. The technical solution is as follows:
[0006] An embodiment of the present disclosure provides a vibration-damping mounting device for a water jet propulsion system, which is sleeved outside the outer shell of the water jet propulsion system and partially located in the inner hole of the stern plate of the hull; the vibration-damping mounting device includes a first limiting ring, a second limiting ring and a buffer ring, the first limiting ring and the second limiting ring are located between the outer shell and the stern plate; the buffer ring is located between the first limiting ring and the second limiting ring, and is respectively connected to the first limiting ring and the second limiting ring; there are gaps between the first limiting ring and the second limiting ring and the outer shell and the stern plate in the radial direction, respectively, and the first limiting ring and the second limiting ring are respectively used to cooperate with the stern plate to limit the axial position of the buffer ring in the inner hole, the buffer ring is in contact with the outer shell and the stern plate, respectively, and the buffer ring can undergo elastic deformation.
[0007] In yet another implementation of the present disclosure, the buffer ring is a rubber sealing ring.
[0008] In another embodiment of the present disclosure, the first limiting ring includes a first half ring, a second half ring, a first connecting block and a second connecting block, one end of the first half ring is detachably connected to one end of the second half ring through the first connecting block, and the other end of the first half ring is detachably connected to the other end of the second half ring through the second connecting block; and / or, the second limiting ring includes a third half ring, a fourth half ring, a third connecting block and a fourth connecting block, one end of the third half ring is detachably connected to one end of the fourth half ring through the third connecting block, and the other end of the third half ring is detachably connected to the other end of the fourth half ring through the fourth connecting block.
[0009] In another embodiment of the present disclosure, the first half ring and the second half ring have the same structure, and the inner walls of the first half ring and the second half ring facing the buffer ring have a first inner flange, and the first inner flange is clearance-fitted with the outer shell.
[0010] In another embodiment of the present disclosure, the first connecting block and the second connecting block have the same structure, and both the first connecting block and the second connecting block have an inner arc surface, and the inner arc surface, the inner ring surface of the first semi-ring and the inner ring surface of the second semi-ring together form a full circle.
[0011] In another embodiment of the present disclosure, along the axial direction of the first limiting ring, the first connecting block and the second connecting block are both located on the side of the first half ring and the second half ring away from the buffer ring; along the radial outward direction of the first limiting ring, the first connecting block and the second connecting block both have a first limiting portion protruding outside the first half ring and the second half ring, and the first limiting portion is located outside the inner hole of the stern plate and is in contact with the stern plate.
[0012] In another embodiment of the present disclosure, the third half ring and the fourth half ring have the same structure, and the inner walls of the third half ring and the fourth half ring facing the buffer ring have a second inner flange, and the second inner flange is clearance-fitted with the outer shell.
[0013] In another embodiment of the present disclosure, the third connecting block and the fourth connecting block have the same structure, and along the radial outward direction of the second limiting ring, the third connecting block and the fourth connecting block both have a second limiting portion protruding outside the third half ring and the fourth half ring, and the second limiting portion is located outside the inner hole of the stern plate and is in contact with the stern plate.
[0014] In another embodiment of the present disclosure, the third connecting block and the fourth connecting block both have a protrusion, which is located on the side of the second limiting portion facing the second limiting ring and is located in the inner hole of the stern plate. The outer wall of the protrusion has an outer arc surface, and the outer arc surface is gap-fitted with the hole wall of the inner hole of the stern plate.
[0015] In another embodiment of the present disclosure, a waterjet-propelled boat is provided, which includes a hull, a waterjet propulsion system and a vibration-damping installation device of the waterjet propulsion system. The hull includes a stern plate and a bottom plate, the stern plate is vertically connected to the bottom plate, the waterjet propulsion system includes a waterjet propulsion pump and an outer shell, the waterjet propulsion pump is located inside the outer shell and is connected to the outer shell, a water inlet channel is formed inside the outer shell, one end of the water inlet channel is a water inlet, and the other end is a water outlet, and the middle part of the outer shell is inserted into the inner hole of the stern plate; the vibration-damping installation device is partially clamped between the stern plate and the outer shell, and is clamped together with the stern plate, wherein the vibration-damping installation device is the vibration-damping installation device described above.
[0016] The technical solutions provided by the embodiments of the present disclosure have the following beneficial effects:
[0017] When the water jet propulsion system is installed on the hull by using the installation device provided by the embodiment of the present disclosure, since the installation device includes a first limiting ring, a second limiting ring and a buffer ring, and the buffer ring is located between the first limiting ring and the second limiting ring, and is respectively connected to the first limiting ring and the second limiting ring, the entire vibration damping installation device can be installed in the hull by cooperating with the first limiting ring and the second limiting ring and the stern plate.
[0018] Furthermore, since there are gaps between the first limiting ring and the second limiting ring and the outer shell and the transom, respectively, the first limiting ring and the second limiting ring can have a certain amount of space for movement when they cooperate with the hull. This allows for a certain amount of displacement buffer space between the outer shell and the transom when the hull or the outer shell vibrates, thereby interfering with or attenuating energy and preventing damage to the outer shell. Simultaneously, the first limiting ring and the second limiting ring can be used to axially limit the buffer ring, facilitating its installation. Furthermore, since the buffer ring is in contact with the outer shell and the transom, respectively, and can undergo elastic deformation, the buffer ring can mitigate vibrations experienced by the outer shell, thereby effectively attenuating vibrations and impacts experienced by the outer shell and extending the service life of the outer shell. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0020] Figure 1 An overall schematic diagram of a water jet propulsion system provided by an embodiment of the present disclosure installed on a hull;
[0021] Figure 2 A schematic structural diagram of a stern plate provided in an embodiment of the present disclosure;
[0022] Figure 3 for Figure 2 Side view of;
[0023] Figure 4 for Figure 2 A top view of
[0024] Figure 5 for Figure 1 Enlarged view of the axial section at B;
[0025] Figure 6 for Figure 1 Schematic diagram of the structure of the middle buffer ring;
[0026] Figure 7 for Figure 1 A schematic structural diagram of the first limiting ring;
[0027] Figure 8 for Figure 7 Cross-sectional view along AA direction;
[0028] Figure 9 for Figure 1 A schematic structural diagram of the second limiting ring;
[0029] Figure 10 for Figure 9 Cross-sectional view along CC direction;
[0030] Figure 11 for Figure 9 Side view of the third connecting block.
[0031] The symbols in the figure mean the following:
[0032] 101, transom; 102, bottom plating; 1010, inner hole; 1011, connecting flange; 1012, perforation;
[0033] 201. Water jet propulsion pump; 202. Outer shell; 203. Water inlet channel;
[0034] 1. First limiting ring; 11. First half ring; 110. First through hole; 111. First inner flange; 12. Second half ring; 120. Second through hole; 13. First connecting block; 130. First connecting hole; 1300. Inner arc surface; 131. First limiting portion; 14. Second connecting block; 140. Second connecting hole;
[0035] 2. Second limiting ring; 21. Third half ring; 211. Second inner flange; 210. Third through hole; 22. Fourth half ring; 220. Fourth through hole; 23. Third connecting block; 230. Third connecting hole; 231. Second limiting portion; 232. Protrusion; 2320. Outer arc surface; 24. Fourth connecting block; 240. Fourth connecting hole;
[0036] 3. Buffer ring; 30. Through hole. DETAILED DESCRIPTION
[0037] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.
[0038] Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meanings understood by persons of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," "third," and similar terms used in the patent specification and claims of this disclosure do not denote any order, quantity, or importance, but are merely used to distinguish between different components. Similarly, terms such as "a" or "an" do not denote a quantitative limitation, but rather denote the presence of at least one. Terms such as "include" or "comprising" mean that the ring or ring preceding "include" or "comprising" encompasses the ring or ring listed after "include" or "comprising," and their equivalents, and do not exclude other rings or rings. Terms such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," "right," "top," and "bottom" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0039] The waterjet propulsion system is a new type of marine propulsion device. Due to its simple structure and wide speed range, the waterjet propulsion system has become the mainstream propulsion device for high-performance ships. The waterjet propulsion system is installed on the hull.
[0040] Figure 1 The overall schematic diagram of the water jet propulsion system provided in the embodiment of the present disclosure installed on the hull, combined with Figure 1 The hull includes a stern plate 101 and a bottom plate 102, and the stern plate 101 is vertically connected to the bottom plate 102.
[0041] The waterjet propulsion system includes a waterjet pump 201 and an outer shell 202. The waterjet pump 201 is located inside and connected to the outer shell 202. The outer shell 202 is in the shape of a curved pipe. A water inlet channel 203 is formed inside the outer shell 202. One end of the water inlet channel 203 is a water inlet, and the other end is a water outlet. The bottom of the outer shell 202 near the water inlet is fixedly connected to the bottom plate of the hull via bolts or the like. The middle portion of the outer shell 202 is inserted into the transom 101 of the hull.
[0042] The thrust of the water jet propulsion system is obtained by the reaction force of the water flow ejected by the water jet propulsion pump.
[0043] Figure 2 A schematic structural diagram of a stern plate provided in an embodiment of the present disclosure is provided. Figure 3 for Figure 2 Side view of Figure 4 for Figure 2 The top view, combined with Figure 2-4 The transom plate 101 in the embodiment of the present disclosure is a transom flange plate having an inner hole 1010. To prevent electrochemical corrosion, a rubber plate and a bolt insulating sleeve are added to the transom plate 101.
[0044] The outer periphery of the transom 101 has a connecting flange 1011, and a plurality of connecting holes are arranged at intervals along the circumference of the connecting flange 1011. The connecting holes are used to connect with other components of the hull.
[0045] The transom 101 has a plurality of through-holes 1012 near the top, and the through-holes 1012 are used for pipes or lines of the water jet propulsion pump 201 to pass through.
[0046] The present disclosure provides a vibration reduction installation device for a water jet propulsion system. The vibration reduction installation device is sleeved outside the outer shell 202 of the water jet propulsion system and is partially located in the inner hole 1010 of the transom 101 of the hull.
[0047] Figure 5 for Figure 1 The enlarged view of the axial section at B in the middle, combined with Figure 5 The vibration reduction mounting device includes a first limiting ring 1, a second limiting ring 2 and a buffer ring 3. The first limiting ring 1 and the second limiting ring 2 are located between the outer shell 202 and the transom 101.
[0048] The buffer ring 3 is located between the first limiting ring 1 and the second limiting ring 2 and is connected to the first limiting ring 1 and the second limiting ring 2 respectively.
[0049] There are gaps between the first limiting ring 1 and the second limiting ring 2 and the outer shell 202 and the stern plate 101 in the radial direction, and the first limiting ring 1 and the second limiting ring 2 are respectively used to cooperate with the stern plate 101 to limit the axial position of the buffer ring 3 in the inner hole. The buffer ring 3 is in contact with the outer shell 202 and the stern plate 101, respectively, and the buffer ring 3 can undergo elastic deformation.
[0050] When the water jet propulsion system is installed on the hull by using the installation device provided by the embodiment of the present disclosure, since the installation device includes a first limiting ring 1, a second limiting ring 2 and a buffer ring 3, and the buffer ring 3 is located between the first limiting ring 1 and the second limiting ring 2, and is respectively connected to the first limiting ring 1 and the second limiting ring 2, the entire vibration damping installation device can be installed in the hull by cooperating with the first limiting ring 1 and the second limiting ring 2 and the stern plate 101.
[0051] Furthermore, because there are gaps between the first limiting ring 1 and the second limiting ring 2 and the outer shell 202 and the transom 101, respectively, the first limiting ring 1 and the second limiting ring 2 can have a certain amount of space to move when they cooperate with the hull. This allows for a certain amount of displacement buffer space between the outer shell and the transom when the hull or the outer shell 202 vibrates, thereby interfering with or attenuating energy and preventing damage to the outer shell 202. Simultaneously, the first limiting ring 1 and the second limiting ring 2 can also be used to axially limit the buffer ring 3, facilitating its installation. Furthermore, because the buffer ring 3 is in contact with the outer shell 202 and the transom 101, respectively, and can undergo elastic deformation, the buffer ring 3 can mitigate vibrations experienced by the outer shell, thereby effectively attenuating vibrations and impacts experienced by the outer shell and extending the service life of the outer shell.
[0052] Figure 6 for Figure 1 Schematic diagram of the structure of the buffer ring, combined with Figure 6 Optionally, the buffer ring 3 is a rubber sealing ring.
[0053] In the above implementation, since the buffer ring 3 is a sealing ring made of rubber material, the buffer ring 3 has expansion and friction characteristics. The buffer ring 3 can effectively buffer the vibration generated by the operation of the water jet propulsion system to achieve the effect of vibration isolation, thereby avoiding the mechanical vibration generated at the stern plate 101 of the hull and the resulting vibration noise.
[0054] In other examples, the buffer ring 3 may also be in other structural forms, such as a rubber vibration damping pad or a vibration damper made of other composite materials.
[0055] In the disclosed embodiment, to facilitate connection of the buffer ring 3 with the first retaining ring 1 and the second retaining ring 2, the buffer ring 3 has a plurality of through-holes 30 spaced apart along its circumference. The axial direction of the through-holes 30 is the same as that of the buffer ring 3. The through-holes 30 are used to insert fasteners to connect with the first retaining ring 1 and the second retaining ring 2.
[0056] Figure 7 for Figure 1 The structural diagram of the first limiting ring in Figure 7 Optionally, the first limiting ring 1 includes a first half ring 11, a second half ring 12, a first connecting block 13 and a second connecting block 14, one end of the first half ring 11 is detachably connected to one end of the second half ring 12 through the first connecting block 13, and the other end of the first half ring 11 is detachably connected to the other end of the second half ring 12 through the second connecting block 14.
[0057] In the above implementation, the first limiting ring 1 is set to the above structure, and the detachable connection between the first half ring 11 and the second half ring 12 can be realized through the first connecting block 13 and the second connecting block 14, so that the first limiting ring 1 is a detachable structure, which facilitates the assembly and assembly of the first limiting ring 1.
[0058] In the embodiment of the present disclosure, the first connecting block 13 is detachably connected to the first half ring 11 and the second half ring 12 by fasteners such as bolts.
[0059] The first connecting block 13 is also detachably connected to the first half ring 11 and the second half ring 12 by fasteners such as bolts.
[0060] In the disclosed embodiment, the first half ring 11 has a plurality of first through holes 110 arranged at intervals along its circumference, and the second half ring 12 has a plurality of second through holes 120 arranged at intervals along its circumference. The first connecting block 13 has two first connecting holes 130, and the second connecting block 14 has two second connecting holes 140.
[0061] Among them, one of the two first connecting holes 130 in each first connecting block 13 and one of the first through holes 110 in the first half ring 11 are jointly inserted with bolts or other fasteners, and the other one of the two first connecting holes 130 and one of the second through holes 120 in the second half ring 12 are jointly inserted with bolts or other fasteners, so that the detachable connection between the first half ring 11 and the second half ring 12 can be easily realized.
[0062] In addition, the first through-holes 110 in the first half ring 11 correspond one-to-one with the through-holes 30 in the buffer ring 3, and the second through-holes 120 in the second half ring 12 correspond one-to-one with the through-holes 30 in the buffer ring 3. The corresponding first through-holes 110 and through-holes 30, as well as the corresponding second through-holes 120 and through-holes 30, are coaxially arranged, and fasteners such as bolts are inserted into the corresponding first through-holes 110 and through-holes 30, and fasteners such as bolts are inserted into the corresponding second through-holes 120 and through-holes 30. In this way, the connection between the first limit ring 1 and the buffer ring 3 is achieved.
[0063] Continue to see Figure 7 Optionally, the first connecting block 13 and the second connecting block 14 have the same structure, and both the first connecting block 13 and the second connecting block 14 have an inner arcuate surface 1300. The center of the circle corresponding to the arc length of the inner arcuate surface 1300 is concentric with the center of the first semi-ring 11 or the second semi-ring 12. The inner arcuate surface 1300, the inner annular surface of the first semi-ring 11, and the inner annular surface of the second semi-ring 12 together form a full circle.
[0064] In the above implementation, an inner arc surface 1300 is set in the first connecting block 13 and the second connecting block 14, and the inner arc surface 1300 can be used to form a full circle with the inner ring surface of the first half ring 11 and the inner ring surface of the second half ring 12, so as to cooperate with the outer shell 202 through the full circle, so that the first limit ring 1 can be matched with the outer shell 202 with equal clearance throughout the entire circumference.
[0065] In other examples, the first connecting block 13 and the second connecting block 14 may be configured as other connecting sheet structures, in which case the first half ring 11 and the second half ring 12 may be butted together to form a full circle. The first connecting block 13 and the second connecting block 14 only serve to connect and fix.
[0066] Figure 8 for Figure 7 The cross-sectional view along the AA direction, combined with Figure 8 Optionally, the first half ring 11 and the second half ring 12 have the same structure, and the inner wall of the first half ring 11 and the second half ring 12 facing the buffer ring 3 has a first inner flange 111, and the first inner flange 111 is clearance-fitted with the outer shell 202.
[0067] In the above implementation, the provision of the first inner flange 111 can make the inner diameter of the opening of the end of the first limiting ring 1 away from the buffer ring 3 larger, thereby facilitating assembly.
[0068] See also Figure 7 Optionally, along the axial direction of the first limiting ring 1 , the first connecting block 13 and the second connecting block 14 are both located on the side of the first half ring 11 and the second half ring 12 away from the buffer ring 3 .
[0069] Along the radial outward direction of the first limiting ring 1, the first connecting block 13 and the second connecting block 14 both have a first limiting portion 131 protruding outside the first half ring 11 and the second half ring 12. The first limiting portion 131 is located outside the inner hole of the stern plate and is in contact with the stern plate 101.
[0070] In the above implementation, the first connecting block 13 and the second connecting block 14 are disposed on the side of the first and second half rings 11 and 12 away from the buffer ring 3. This allows the first stopper 131 to be located outside the transom 101. Furthermore, after the first stopper 131 is in contact with the transom 101, the contact between the first stopper 131 and the transom 101 can limit one end of the buffer ring 3 in the axial direction, preventing the buffer ring 3 from moving toward the second stopper ring 2.
[0071] That is to say, the above structure not only enables the first connecting block 13 and the second connecting block 14 to connect the first half ring 11 and the second half ring 12 into a full circle, but also limits the buffer ring 3 so that the buffer ring 3 does not move axially.
[0072] Figure 9 for Figure 1 The structural diagram of the second limiting ring in the Figure 9 Optionally, the second limiting ring 2 includes a third half ring 21, a fourth half ring 22, a third connecting block 23 and a fourth connecting block 24, one end of the third half ring 21 is detachably connected to one end of the fourth half ring 22 through the third connecting block 23, and the other end of the third half ring 21 is detachably connected to the other end of the fourth half ring 22 through the fourth connecting block 24.
[0073] In the above implementation, the second limiting ring 2 is set to the above structure, and the detachable connection between the third half ring 21 and the fourth half ring 22 can be realized through the third connecting block 23 and the fourth connecting block 24, so that the second limiting ring 2 is a detachable structure, which facilitates the assembly and assembly of the second limiting ring 2.
[0074] In the embodiment of the present disclosure, the third connecting block 23 is detachably connected to the third half ring 21 and the fourth half ring 22 by fasteners such as bolts.
[0075] The fourth connecting block 24 is also detachably connected to the third half ring 21 and the fourth half ring 22 by fasteners such as bolts.
[0076] In this embodiment, the third half ring 21 has a plurality of third through holes 210 arranged at intervals along its circumference, and the fourth half ring 22 has a plurality of fourth through holes 220 arranged at intervals along its circumference. The third connecting block 23 has two third connecting holes 230, and the fourth connecting block 24 has two fourth connecting holes 240.
[0077] Among them, one of the two third connecting holes 230 in each third connecting block 23 and one of the third through holes 210 in the third half ring 21 are jointly inserted with bolts or other fasteners, and the other one of the two third connecting holes 230 and one of the fourth through holes 220 in the fourth half ring 22 are jointly inserted with bolts or other fasteners, so that the detachable connection between the third half ring 21 and the fourth half ring 22 can be easily realized.
[0078] In addition, the third through holes 210 in the third half ring 21 correspond one-to-one with the through holes 30 in the buffer ring 3, and the fourth through holes 220 in the fourth half ring 22 correspond one-to-one with the through holes 30 in the buffer ring 3. The corresponding third through holes 210 and through holes 30, as well as the corresponding fourth through holes 220 and through holes 30, are coaxially arranged, and fasteners such as bolts are inserted into the corresponding third through holes 210 and through holes 30, and fasteners such as bolts are inserted into the corresponding fourth through holes 220 and through holes 30. In this way, the connection between the second limit ring 2 and the buffer ring 3 is achieved.
[0079] Figure 10 for Figure 9 The cross-sectional view along CC direction, combined with Figure 10 Optionally, the third half ring 21 and the fourth half ring 22 have the same structure, and the inner wall of the third half ring 21 and the fourth half ring 22 facing the buffer ring 3 has a second inner flange 211, and the second inner flange 211 is clearance-fitted with the outer shell.
[0080] In the above implementation, the provision of the second inner flange 211 can make the inner diameter of the opening of the end of the second limiting ring 2 away from the buffer ring 3 larger, thereby facilitating assembly.
[0081] Figure 11 for Figure 9 Side view of the third connecting block, combined with Figure 11 Optionally, the third connecting block 23 and the fourth connecting block 24 have the same structure, and along the radial outward direction of the second limiting ring 2, the third connecting block 23 and the fourth connecting block 24 both have a second limiting portion 231 protruding outside the third half ring 21 and the fourth half ring 22, and the second limiting portion 231 is located outside the inner hole 1010 of the stern plate 101 and is in contact with the stern plate 101.
[0082] In the above implementation, the second limiting portion 231 is located outside the inner hole 1010 , thereby engaging with the stern plate 101 to limit the axial direction of the buffer ring 3 , so that the buffer ring 3 cannot move toward the direction of the first limiting ring 1 .
[0083] Optionally, the third connecting block 23 and the fourth connecting block 24 both have a protrusion 232, which is located on the side of the second limiting portion 231 facing the second limiting ring 2 and is located in the inner hole 1010 of the stern plate 101. The outer wall of the protrusion 232 has an outer arc surface 2320, and the outer arc surface 2320 is gap-fitted with the hole wall of the inner hole 1010 of the stern plate 101.
[0084] In the above implementation, the protrusion 232 is configured to be accommodated in the inner hole 1010 so as to cooperate with the inner hole 1010, thereby enabling the third connecting block 23 and the fourth connecting block 24 to be partially inserted into the inner hole 1010 for easy positioning and assembly.
[0085] That is to say, the above structure can cooperate with the first connecting block 13 and the second connecting block 14 to limit the axial movement of the buffer ring 3 to ensure that the buffer ring 3 does not fall off.
[0086] Continue to see Figure 1 On the other hand, the embodiment of the present disclosure also provides a water jet propulsion vessel, which includes a hull, a water jet propulsion system and a vibration reduction installation device of the water jet propulsion system. The hull includes a stern plate 101 and a bottom plate 102, and the stern plate 101 is vertically connected to the bottom plate 102.
[0087] The water jet propulsion system includes a water jet propulsion pump 201 and an outer shell 202. The water jet propulsion pump 201 is located inside the outer shell 202 and is connected to the outer shell 202. A water inlet channel 203 is formed inside the outer shell 202. One end of the water inlet channel 203 is a water inlet, and the other end is a water outlet. The middle part of the outer shell 202 is inserted into the inner hole 1010 of the stern plate 101.
[0088] The vibration-damping mounting device is partially clamped between the transom 101 and the outer shell 202 and is clamped together with the transom 101 , wherein the vibration-damping mounting device is the vibration-damping mounting device mentioned above.
[0089] The above water jet propulsion vessel has the same beneficial effects as the aforementioned vibration reduction installation device, which will not be described in detail here.
[0090] The following briefly introduces the installation and use process of the vibration reduction installation device provided by the embodiment of the present disclosure:
[0091] First, complete the machining of the first limiting ring 1, the second limiting ring 2 and the buffer ring 3 according to the drawings, ensuring the roughness Ra3.2.
[0092] Then, based on the dimensions of the water inlet channel, install the buffer ring 3 at the designated location. Install the first and second limiting rings 1 and 2 on either side of the buffer ring 3. Connect the first, second, and buffer rings 1 and 2 together using bolts and other fasteners. At the same time, secure the first and second limiting rings 1 and 2 to the transom 101 and other components.
[0093] Next, the transom 101 is connected to other hull components using bolts and other fasteners. If the two are made of dissimilar metals, an insulating sleeve should be used for physical insulation. After all structural connections are completed, check for looseness and slippage to ensure the stability of the entire device.
[0094] After the water jet propulsion system is installed through the above vibration reduction installation device, the thrust generated by the water jet propulsion system during operation can be effectively transmitted to the water inlet channel instead of to the stern plate. At the same time, since the buffer ring 3 is made of rubber material and has expansion and friction characteristics, it can effectively buffer, isolate and position the vibration generated by the operation of the water jet propulsion system, thereby avoiding the mechanical vibration generated at the stern plate and the resulting vibration noise.
[0095] The above description is merely an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.
Claims
1. A vibration reduction installation device for a water jet propulsion system, characterized in that: The vibration reduction installation device is sleeved outside the outer shell (202) of the water jet propulsion system and is partially located in the inner hole of the transom (101) of the hull; The vibration-damping installation device comprises a first limiting ring (1), a second limiting ring (2) and a buffer ring (3); the first limiting ring (1) and the second limiting ring (2) are located between the outer shell (202) and the transom (101); The buffer ring (3) is located between the first limiting ring (1) and the second limiting ring (2), and is respectively connected to the first limiting ring (1) and the second limiting ring (2); There are gaps between the first limiting ring (1) and the second limiting ring (2) and the outer shell (202) and the stern plate (101) in the radial direction, respectively, and the first limiting ring (1) and the second limiting ring (2) are respectively used to cooperate with the stern plate (101) to limit the axial position of the buffer ring (3) in the inner hole, and the buffer ring (3) is respectively in contact with the outer shell (202) and the stern plate (101), and the buffer ring (3) can undergo elastic deformation.
2. The vibration-damping mounting device according to claim 1, characterized in that: The buffer ring (3) is a rubber sealing ring.
3. The vibration-damping mounting device according to any one of claims 1 to 2, characterized in that: The first limiting ring (1) comprises a first half ring (11), a second half ring (12), a first connecting block (13) and a second connecting block (14); one end of the first half ring (11) is detachably connected to one end of the second half ring (12) via the first connecting block (13); and the other end of the first half ring (11) is detachably connected to the other end of the second half ring (12) via the second connecting block (14); and / or, The second limiting ring (2) comprises a third half ring (21), a fourth half ring (22), a third connecting block (23) and a fourth connecting block (24); one end of the third half ring (21) is detachably connected to one end of the fourth half ring (22) via the third connecting block (23); the other end of the third half ring (21) is detachably connected to the other end of the fourth half ring (22) via the fourth connecting block (24).
4. The vibration-damping mounting device according to claim 3, characterized in that: The first half ring (11) and the second half ring (12) have the same structure; the inner walls of the first half ring (11) and the second half ring (12) facing the buffer ring (3) have a first inner flange (111); the first inner flange (111) is loosely fitted with the outer shell (202).
5. The vibration-damping mounting device according to claim 3, characterized in that: The first connecting block (13) and the second connecting block (14) have the same structure, and both the first connecting block (13) and the second connecting block (14) have an inner arc surface (1300), and the inner arc surface (1300), the inner ring surface of the first half ring (11) and the inner ring surface of the second half ring (12) together form a full circle.
6. The vibration-damping mounting device according to claim 5, characterized in that: Along the axial direction of the first limiting ring (1), the first connecting block (13) and the second connecting block (14) are both located on a side of the first half ring (11) and the second half ring (12) away from the buffer ring (3); Along the radial outward direction of the first limiting ring (1), the first connecting block (13) and the second connecting block (14) both have a first limiting portion (131) protruding outside the first half ring (11) and the second half ring (12); the first limiting portion (131) is located outside the inner hole (1010) of the stern plate (101) and is in contact with the stern plate (101).
7. The vibration-damping mounting device according to claim 3, characterized in that: The third half ring (21) and the fourth half ring (22) have the same structure; the inner walls of the third half ring (21) and the fourth half ring (22) facing the buffer ring (3) have a second inner flange (211); the second inner flange (211) is clearance-fitted with the outer shell (202).
8. The vibration-damping mounting device according to claim 3, characterized in that: The third connecting block (23) and the fourth connecting block (24) have the same structure, and along the radial outward direction of the second limiting ring (2), the third connecting block (23) and the fourth connecting block (24) both have a second limiting portion (231) protruding outside the third half ring (21) and the fourth half ring (22), and the second limiting portion (231) is located outside the inner hole (1010) of the stern plate (101) and fits with the stern plate (101).
9. The vibration-damping mounting device according to claim 8, characterized in that: The third connecting block (23) and the fourth connecting block (24) both have a protrusion (232), the protrusion (232) is located on the side of the second limiting portion (231) facing the second limiting ring (2), and is located in the inner hole (1010) of the stern plate (101), the outer wall of the protrusion (232) has an outer arc surface (2320), and the outer arc surface (2320) is gap-matched with the hole wall of the inner hole (1010) of the stern plate (101).
10. A water jet propulsion vessel, characterized in that: The water jet propulsion ship comprises a hull, a water jet propulsion system and a vibration reduction installation device of the water jet propulsion system, the hull comprises a stern plate (101) and a bottom plate (102), the stern plate (101) being vertically connected to the bottom plate (102); The water jet propulsion system comprises a water jet propulsion pump (201) and an outer shell (202); the water jet propulsion pump (201) is located inside the outer shell (202) and is connected to the outer shell (202); a water inlet channel (203) is formed inside the outer shell (202); one end of the water inlet channel (203) is a water inlet, and the other end is a water jet; the middle part of the outer shell (202) is inserted into the inner hole (1010) of the transom (101); The vibration-damping mounting device is partially clamped between the transom (101) and the outer shell (202), and is clamped together with the transom (101), wherein the vibration-damping mounting device is the vibration-damping mounting device according to any one of claims 1 to 9.