Three-degree-of-freedom catamaran structure for hydraulic interconnection damping

Abstract

The three-degree-of-freedom catamaran structure comprises an upper cabin, hydraulic cylinder sets and buoys which are sequentially arranged from top to bottom, the whole three-degree-of-freedom catamaran is of a trapezoidal structure from the front view and the left view, the hydraulic cylinder sets are the two waists of the trapezoidal structure, the upper cabin is arranged at the upper bottom of the trapezoidal structure, and the lower cabin is arranged at the lower bottom of the trapezoidal structure. And the buoy is arranged at the lower bottom of the trapezoidal structure, so that a double-rocker mechanism is formed, and the hull structure of the whole three-degree-of-freedom catamaran is ensured to deform and move within a fixed range. According to the technical scheme, the influence of vibration on key equipment can be remarkably reduced, the risk of equipment damage is reduced, and the maintenance cost is saved. And the safety and controllability of the ship under various sailing conditions are ensured, and the stability of the ship is enhanced. If a passenger compartment is expanded, the influence of vibration on the comfort of passengers can be effectively weakened.

Description

Technical Field

[0001] The present invention relates to the field of ship and marine engineering technology, and in particular to a three-degree-of-freedom catamaran structure for hydraulic interconnection shock absorption. Background Art

[0002] At present, professional rescue ships and rescue aircraft play a vital role in maritime rescue activities. Professional rescue ships are the main force for water rescue. Professional rescue ships have the characteristics of strong wind and wave resistance, good seakeeping performance and seaworthiness, and can carry a large amount of rescue equipment and materials. However, for areas where professional rescue ships cannot enter, such as shallow waters, complex waterways, changeable water currents, and frequent accidents, the role that rescue ships can play is greatly limited. At the same time, due to the relatively slow movement speed and poor flexibility of professional rescue ships, their role in the process of searching and rescuing people in distress before rescue is very limited. Summary of the invention

[0003] According to the technical problems raised above, a three-degree-of-freedom catamaran structure for hydraulic interconnected shock absorption is provided. The present invention designs a special rescue hull suitable for a hydraulic interconnected shock absorption suspension system, so that the hull and the suspension system are matched to achieve the best shock absorption effect.

[0004] The technical means adopted by the present invention are as follows:

[0005] A three-degree-of-freedom catamaran for hydraulic interconnected shock absorption comprises: an upper cabin, a hydraulic cylinder group and a buoy arranged in sequence from top to bottom. The overall structure of the three-degree-of-freedom catamaran is a trapezoidal structure when viewed from the front and left. The hydraulic cylinder group is the two sides of the trapezoidal structure, the upper bottom of the trapezoidal structure is the upper cabin, and the lower bottom of the trapezoidal structure is the buoy, thereby forming a double rocker mechanism to ensure that the hull structure of the entire three-degree-of-freedom catamaran can deform and move within a fixed range.

[0006] Furthermore, the upper cabin body is a rectangular parallelepiped structure, and eight connection pairs are fixedly arranged on the rectangular parallelepiped structure, wherein:

[0007] There are four connection pairs for connecting the bearing bases of the radial spherical bearings. Two bearing bases are fixedly arranged on one side of the rectangular parallelepiped structure, and the two bearing bases are on a horizontal line and maintain a certain distance; the other two bearing bases are arranged on the other side of the rectangular parallelepiped structure, and the two bearing bases are on a horizontal line and maintain a certain distance; the bearing bases on both sides of the rectangular parallelepiped structure are arranged oppositely, and the two bearing bases on the opposite sides are on a horizontal line and maintain a certain distance;

[0008] The other four connection pairs are ball joint bases for connecting the ball joints. Two ball joint bases are fixedly arranged on one side of the rectangular parallelepiped structure, and the two ball joint bases are on a horizontal line and maintain a certain distance. Another two ball joint bases are arranged on the other side of the rectangular parallelepiped structure, and the two ball joint bases are on a horizontal line and maintain a certain distance. The ball joint bases on both sides of the rectangular parallelepiped structure are arranged oppositely, and the two ball joint bases on the opposite sides are on a horizontal line and maintain a certain distance.

[0009] The four ball joint bases are arranged oppositely on the outer sides of the four bearing bases.

[0010] Furthermore, the hydraulic cylinder group is a shock-absorbing and buffering unit of the catamaran structure, and the oil circuit is connected using the interconnected shock-absorbing principle.

[0011] Furthermore, the hydraulic cylinder group includes 8 hydraulic cylinders, and both ends of each hydraulic cylinder are connected with a piston rod and a ball joint, wherein:

[0012] The piston rod is connected to the bearing base of the upper cabin body through a radial spherical bearing; and the ball joint is connected to the ball joint base of the upper cabin body.

[0013] Furthermore, the buoy includes two buoys of exactly the same shape, the two buoys are symmetrically arranged, and each buoy is also provided with four connection pairs, wherein:

[0014] Two connection pairs are connected to the bearing base of the radial spherical bearing, and the other two connection pairs are connected to the ball joint base of the ball joint. The four connection pairs are on a horizontal line, and the bearing base is arranged on the outside of the ball joint base; the piston rod of the hydraulic cylinder is connected to the bearing base of the floating body through the radial spherical bearing; the ball joint of the hydraulic cylinder is connected to the ball joint base of the floating body.

[0015] Furthermore, when the three-degree-of-freedom catamaran is subjected to heave excitation, all hydraulic cylinders contract simultaneously, and the suspension absorbs the impact energy and reduces vibration.

[0016] Furthermore, when the three-degree-of-freedom catamaran is subjected to pitch excitation, the hydraulic cylinders on the front and rear sides contract and extend in turn to compensate for the displacement and absorb the impact energy.

[0017] Furthermore, when the three-degree-of-freedom catamaran is excited to roll, the hydraulic cylinder groups on the left and right sides contract and extend in turn to compensate for the displacement and absorb the impact energy.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. Compared with ordinary rescue boats, the present invention adopts a hydraulic interconnection system as a shock absorption system. In order to adapt to the special hydraulic system, the present invention also designs a new type of hydraulic suspension arrangement connection form, which is different from the double-cylinder parallel structure of the Australian Nauti-Craft wave adaptation ship. The new structure proposed by the present invention solves the force coupling problem of the suspension at the physical level.

[0020] 2. The present invention designs a special rescue hull suitable for a hydraulically interconnected shock-absorbing suspension system, so that the hull and the suspension system are matched to achieve the best shock-absorbing effect. Ships with good shock-absorbing effects can not only reduce or weaken the impact of vibration on equipment and personnel, but also reduce the risk of rescue, minimize casualties and economic losses caused by maritime disasters, and are of great significance to promoting economic and social development.

[0021] Based on the above reasons, the present invention can be widely promoted in the fields of shipbuilding and marine engineering. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 This is a simplified diagram of the suspension mechanical principle structure;

[0024] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 3 It is the front view of the overall structure of the present invention;

[0026] Figure 4 It is a left view of the overall structure of the present invention;

[0027] Figure 5 It is a schematic diagram of the operation of a catamaran when it is subjected to heave excitation;

[0028] Figure 6 It is a schematic diagram of the operation of a catamaran when it is subjected to pitch excitation;

[0029] Figure 7 It is a schematic diagram of the operation of the catamaran when it is subjected to rolling excitation (the upper cabin is fixed);

[0030] Figure 8 It is a schematic diagram of the operation of the catamaran when it is subject to rolling excitation (the buoy is fixed);

[0031] In the figure: 1. upper cabin; 2. hydraulic cylinder; 3. piston rod; 4. floating body; 5. bearing base; 6. ball joint base; 7. ball joint; 8. radial spherical bearing. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0035] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0036] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0037] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0038] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0039] like Figure 1-4 As shown, the present invention provides a three-degree-of-freedom catamaran for hydraulic interconnected shock absorption, comprising: an upper cabin 1, a hydraulic cylinder group and a buoy arranged in sequence from top to bottom, the overall three-degree-of-freedom catamaran presents a trapezoidal structure from the front view and the left view, the hydraulic cylinder group is the two waists of the trapezoidal structure, the upper bottom of the trapezoidal structure is the upper cabin 1, and the lower bottom of the trapezoidal structure is the buoy, thereby forming a double rocker mechanism to ensure that the hull structure of the entire three-degree-of-freedom catamaran is deformed and moved within a fixed range.

[0040] When specifically implemented, as a preferred embodiment of the present invention, see Figure 2 The upper cabin 1 is a rectangular parallelepiped structure, and eight connection pairs are fixedly arranged on the rectangular parallelepiped structure, wherein:

[0041] There are four connection pairs for connecting the bearing bases 5 of the radial spherical bearing, two bearing bases 5 are fixedly arranged on one side of the rectangular parallelepiped structure, and the two bearing bases 5 are on a horizontal line and keep a certain distance; the other two bearing bases 5 are arranged on the other side of the rectangular parallelepiped structure, and the two bearing bases 5 are on a horizontal line and keep a certain distance; the bearing bases 5 on both sides of the rectangular parallelepiped structure are arranged oppositely, and the two bearing bases 5 on the opposite sides are on a horizontal line and keep a certain distance;

[0042] The other four connection pairs are ball joint bases 6 for connecting the ball joints. Two ball joint bases 6 are fixedly arranged on one side of the rectangular parallelepiped structure, and the two ball joint bases 6 are on a horizontal line and maintain a certain distance; the other two ball joint bases 6 are arranged on the other side of the rectangular parallelepiped structure, and the two ball joint bases 6 are on a horizontal line and maintain a certain distance; the ball joint bases 6 on both sides of the rectangular parallelepiped structure are arranged oppositely, and the two ball joint bases 6 on the opposite sides are on a horizontal line and maintain a certain distance;

[0043] The four ball joint bases 6 are all arranged oppositely on the outside of the four bearing bases 5. The hydraulic cylinder group is a shock absorbing and buffering unit of a catamaran structure, and the oil circuit is connected by an interconnected shock absorbing principle.

[0044] When implementing the invention, as a preferred embodiment of the invention, see Figure 2 The hydraulic cylinder group includes 8 hydraulic cylinders 2, and each hydraulic cylinder 2 is connected to a piston rod 3 and a ball joint 7 at both ends, wherein:

[0045] The piston rod 3 is connected to the bearing base 5 of the upper cabin body 1 through a radial spherical bearing 8; the ball joint 7 is connected to the ball joint base 6 of the upper cabin body 1.

[0046] When implementing the invention, as a preferred embodiment of the invention, continue to refer to Figure 2 The buoy comprises two buoys 4 of exactly the same shape, the two buoys 4 are symmetrically arranged, and each buoy 4 is also provided with four connection pairs, wherein:

[0047] Two connection pairs are bearing bases 5 connected to radial spherical bearings 8, and the other two connection pairs are ball joint bases 6 connected to ball joints 7. The four connection pairs are on a horizontal line, and the bearing base 5 is arranged on the outside of the ball joint base 6; the piston rod 3 of the hydraulic cylinder 2 is connected to the bearing base 5 of the floating body 4 through the radial spherical bearing 8; the ball joint 7 of the hydraulic cylinder 2 is connected to the ball joint base 6 of the floating body 4.

[0048] When specifically implemented, as a preferred embodiment of the present invention, Figure 5 As shown, when the three-degree-of-freedom catamaran is subjected to heave excitation, all hydraulic cylinders 2 contract simultaneously, and the suspension absorbs the impact energy and reduces vibration.

[0049] When specifically implemented, as a preferred embodiment of the present invention, Figure 6 As shown, when the three-degree-of-freedom catamaran is subjected to pitch excitation, the hydraulic cylinders 2 on the front and rear sides contract and extend in turn to compensate for the displacement and absorb the impact energy.

[0050] When specifically implemented, as a preferred embodiment of the present invention, Figure 7 , 8 As shown, when the three-degree-of-freedom catamaran is excited to roll, the hydraulic cylinders 2 on the left and right sides contract and extend in turn to compensate for the displacement and absorb the impact energy.

[0051] In this embodiment, a radial spherical bearing connection plus a ball joint connection is used to ensure its motion redundancy. If a common revolute pair is used to connect the suspension and the upper cabin, motion conflict will occur and motion redundancy cannot be provided.

[0052] In summary, the three-degree-of-freedom catamaran for hydraulic interconnected shock absorption provided by the present invention has a good shock absorption effect. It can not only significantly reduce the impact of vibration on key equipment on board and reduce potential damage risks, but also effectively weaken the impact of vibration on passenger comfort if the passenger cabin is expanded.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A three-degree-of-freedom catamaran for hydraulic interconnected shock absorption, characterized in that: include: The upper cabin (1), the hydraulic cylinder group and the buoy are arranged in sequence from top to bottom. The overall structure of the three-degree-of-freedom catamaran is a trapezoidal structure when viewed from the front and left. The hydraulic cylinder group is the two waists of the trapezoidal structure, the upper bottom of the trapezoidal structure is the upper cabin (1), and the lower bottom of the trapezoidal structure is the buoy, thereby forming a double rocker mechanism to ensure that the hull structure of the entire three-degree-of-freedom catamaran can deform and move within a fixed range.

2. A three-degree-of-freedom catamaran for hydraulic interconnected shock absorption according to claim 1, characterized in that: The upper cabin body (1) is a rectangular parallelepiped structure, and eight connection pairs are fixedly arranged on the rectangular parallelepiped structure, wherein: There are four connection pairs for connecting the bearing bases (5) of the radial spherical bearing, two bearing bases (5) are fixedly arranged on one side of the rectangular parallelepiped structure, and the two bearing bases (5) are on a horizontal line and keep a certain distance; the other two bearing bases (5) are arranged on the other side of the rectangular parallelepiped structure, and the two bearing bases (5) are on a horizontal line and keep a certain distance; the bearing bases (5) on both sides of the rectangular parallelepiped structure are arranged oppositely, and the two bearing bases (5) on the opposite sides are on a horizontal line and keep a certain distance; The other four connection pairs are ball joint bases (6) connected to the ball joints, two ball joint bases (6) are fixedly arranged on one side of the rectangular parallelepiped structure, and the two ball joint bases (6) are on a horizontal line and maintain a certain distance; the other two ball joint bases (6) are arranged on the other side of the rectangular parallelepiped structure, and the two ball joint bases (6) are on a horizontal line and maintain a certain distance; the ball joint bases (6) on both sides of the rectangular parallelepiped structure are arranged oppositely, and the two ball joint bases (6) on the opposite sides are on a horizontal line and maintain a certain distance; The four ball joint bases (6) are arranged opposite to each other on the outsides of the four bearing bases (5).

3. A three-degree-of-freedom catamaran for hydraulic interconnection and shock absorption according to claim 1, characterized in that: The hydraulic cylinder group is a shock-absorbing and buffering unit of the catamaran structure, and the oil circuit is connected by adopting the interconnected shock-absorbing principle.

4. A three-degree-of-freedom catamaran for hydraulic interconnection and shock absorption according to claim 1, characterized in that: The hydraulic cylinder group comprises 8 hydraulic cylinders (2), and both ends of each hydraulic cylinder (2) are respectively connected to a piston rod (3) and a ball joint (7), wherein: The piston rod (3) is connected to the bearing base (5) of the upper cabin body (1) through a radial spherical bearing (8); and the ball joint (7) is connected to the ball joint base (6) of the upper cabin body (1).

5. A three-degree-of-freedom catamaran for hydraulic interconnection and shock absorption according to claim 1, characterized in that: The buoy comprises two buoys (4) of identical shape, the two buoys (4) are symmetrically arranged, and each buoy (4) is also provided with four connection pairs, wherein: Two connection pairs are connected to the bearing base (5) of the radial spherical bearing (8), and the other two connection pairs are connected to the ball joint base (6) of the ball joint (7). The four connection pairs are on a horizontal line, and the bearing base (5) is arranged on the outside of the ball joint base (6); the piston rod (3) of the hydraulic cylinder (2) is connected to the bearing base (5) of the floating body (4) through the radial spherical bearing (8); the ball joint (7) of the hydraulic cylinder (2) is connected to the ball joint base (6) of the floating body (4).

6. A three-degree-of-freedom catamaran for hydraulic interconnection and shock absorption according to claim 1, characterized in that: When the three-degree-of-freedom catamaran is subjected to heave excitation, all hydraulic cylinders (2) contract simultaneously, and the suspension absorbs impact energy and reduces vibration.

7. A three-degree-of-freedom catamaran for hydraulic interconnection and shock absorption according to claim 1, characterized in that: When the three-degree-of-freedom catamaran is subjected to pitch excitation, the hydraulic cylinders (2) on the front and rear sides are contracted and extended in turn to compensate for the displacement and absorb the impact energy.

8. The three-degree-of-freedom catamaran for hydraulic interconnection and shock absorption according to claim 1, characterized in that: When the three-degree-of-freedom catamaran is excited to roll, the hydraulic cylinders (2) on the left and right sides are retracted and extended in turn to compensate for the displacement and absorb the impact energy.

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