Connecting device of double-layer vibration isolation structure of main air compressor of ship
Patent Information
- Application Number
- CN202522636567.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-12
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-12-12
AI Technical Summary
（1）安装精度要求高，工序繁琐：主空压机、筏架及多层隔振器之间的对位安装需要极高的空间定位精度；传统的螺栓直接连接方式，在狭窄的机舱空间内调整对孔十分困难，安装周期长，且难以保证各隔振器受力均匀
（1）通过底板连接孔、横向夹持空间及竖向夹持空间，配合横向锁紧件与竖向锁紧件，可使得主空压机支腿及隔振结构能够被快速安装限位，显著降低了在狭窄机舱内的调整与对位难度，将复杂的多维定位简化为简单的夹持与锁紧操作，从而极大提高了安装效率。
Smart Images
Figure CN224920094U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of auxiliary equipment for ship air compressor installation, specifically a connection device for a double-layer vibration isolation structure of a ship's main air compressor. Background Technology
[0002] The main air compressor is a critical piece of equipment in a ship's propulsion system. Vibrations generated during its operation, if directly transmitted to the hull structure, can exacerbate cabin noise, shorten equipment lifespan, and potentially interfere with the normal operation of other precision instruments. To effectively isolate vibrations, double-layer vibration isolation, also known as floating raft vibration isolation technology, has been widely adopted. This technology typically mounts the main air compressor on an intermediate mass block (raft frame) via an upper vibration isolator. This raft frame is then connected to the ship's foundation via a lower vibration isolator, forming a composite system of "equipment-upper vibration isolator-raft frame-lower vibration isolator-foundation." This system utilizes mass effect and the series connection of the vibration isolators to achieve multi-stage attenuation of vibration energy.
[0003] In existing technologies, the on-site installation and connection of such vibration isolation systems typically face the following challenges: (1) High installation accuracy requirements and complicated procedures: The alignment and installation between the main air compressor, raft frame and multi-layer vibration isolators require extremely high spatial positioning accuracy; the traditional bolt direct connection method is very difficult to adjust the hole alignment in the narrow engine room space, the installation cycle is long, and it is difficult to ensure that each vibration isolator is subjected to uniform force.
[0004] (2) High connection rigidity may produce “hard points”: When ordinary bolts are used for rigid locking, the connection point will form a direct transmission path of vibration, i.e., “hard points”, which weakens the overall performance of the vibration isolation system and the fasteners are prone to loosening due to vibration during long-term operation.
[0005] (3) Lack of quick disassembly and assembly functions, and inconvenient maintenance: Ship equipment requires regular maintenance. Traditional connection methods also face the problem of alignment difficulties when disassembling and reinstalling, which is not conducive to the quick maintenance or replacement of equipment.
[0006] Although some vibration isolator structures designed for easy installation have emerged in existing technologies, such as pre-assembled components, a systematic solution is still lacking in achieving a fast, precise, reliable, and flexible connection between the vibration isolator and the raft or base. In particular, there is a design contradiction between balancing the ease of construction through "quick assembly and disassembly" and the operational safety of "long-term reliable locking and prevention of vibration-induced loosening."
[0007] Therefore, there is an urgent need for an innovative connection device that can work with a double-layer vibration isolation structure to significantly improve the installation efficiency, positioning accuracy, and connection reliability of the main air compressor vibration isolation system on ships while ensuring that the vibration isolation effect is not compromised. Utility Model Content
[0008] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a connection device for a double-layer vibration isolation structure of a ship's main air compressor that is compact in structure, easy to operate, and can realize the rapid alignment and elastic locking of the vibration isolator.
[0009] The technical problem to be solved by this utility model is achieved through the following technical solution: a connection device for a double-layer vibration isolation structure of a ship's main air compressor, comprising; The base plate has several base plate connection holes; A pair of upright plates are symmetrically and vertically fixed to the top surface of the middle part of the base plate. The space between the pair of upright plates forms a horizontal clamping space. A horizontal locking hole is opened in the middle of each upright plate. A horizontal locking component is inserted in the horizontal locking hole to achieve horizontal locking inside the horizontal clamping space. A pair of horizontal plates are symmetrically fixed to the top surface of the vertical plate. The space between each horizontal plate and the bottom plate forms a vertical clamping space. A vertical locking hole is opened in the middle of each horizontal plate. A vertical locking component is inserted in the vertical locking hole to achieve vertical locking inside the vertical clamping space. Both the horizontal and vertical locking components include a connecting post, a connecting plate, a primary fastener, an elastic element, and a secondary fastener. The connecting post has a front end near the center of the base plate and a rear end. An abutment plate is fixed to the outer circumference of the middle portion of the connecting post. The connecting plate is fixed to the walls of the horizontal and vertical locking holes by the primary fastener, and a through hole for the connecting post to pass through is provided in the middle of the connecting plate. The elastic element is sleeved on the outer circumference of the rear end of the connecting post, with one end abutting against the abutment plate and the other end abutting against the connecting plate. The secondary fastener is fixed to the end face of the rear end of the connecting post by the connecting plate. The outriggers of the ship's main air compressor within the horizontal and vertical clamping spaces are clamped by transverse and vertical locking components that penetrate the vertical and horizontal plates.
[0010] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the connecting device of the double-layer vibration isolation structure of the main air compressor of a ship described above, wherein the horizontal lock hole and the vertical lock hole are both three-level stepped holes. The three-level stepped holes are composed of first-level holes, second-level holes and third-level holes arranged in ascending order of inner diameter and interconnected with each other, and their distance from the middle of the bottom plate is from near to far.
[0011] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the connecting device of the double-layer vibration isolation structure of the main air compressor of a ship described above, wherein the outer diameter of the connecting column is equal to the inner diameter of the first-stage hole, the outer diameter of the abutment plate is equal to the inner diameter of the second-stage hole, and the outer diameter of the connecting plate is equal to the inner diameter of the third-stage hole.
[0012] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the connecting device of the double-layer vibration isolation structure of the main air compressor of a ship described above also includes a pair of clamping blocks, which are symmetrically arranged in the transverse clamping space. An arc-shaped clamping surface is opened on one side that is close to each other, and an internal thread hole is opened on the other side. The outer peripheral surface of the front end of the connecting column of the transverse locking member is provided with an external thread that is threadedly connected to the internal thread hole.
[0013] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the connecting device of the double-layer vibration isolation structure of the main air compressor of a ship described above, wherein a blind hole is provided on the bottom plate for the front end of the connecting column of the vertical locking member to be inserted.
[0014] Compared with the prior art, the beneficial technical effects of this utility model are: (1) Through the bottom plate connection hole, the horizontal clamping space and the vertical clamping space, and with the horizontal locking part and the vertical locking part, the main air compressor support leg and vibration isolation structure can be quickly installed and limited, which significantly reduces the difficulty of adjustment and alignment in the narrow cabin, and simplifies the complex multi-dimensional positioning into a simple clamping and locking operation, thereby greatly improving the installation efficiency.
[0015] (2) The elastic element integrated inside the locking component is in a pre-compressed state under the action of the secondary fastener, so that the connecting column can always be pushed into the horizontal or vertical clamping space, providing a continuous elastic pre-tightening force for the connection point. This design gives the connection a certain elastic retention characteristic, which can effectively compensate for the slight displacement or loosening that may occur due to vibration and temperature changes during equipment operation, ensuring that the connection remains reliably locked under long-term vibration environment, avoiding the problem of easy loosening of traditional rigid bolts.
[0016] (3) The horizontal and vertical separation clamping design, combined with the elastic buffer in the locking component, allows the vibration load transmitted from the equipment to be initially buffered and attenuated by the elastic element before being transmitted to the vertical plate, horizontal plate and bottom plate. This design breaks the continuous rigid connection path, weakens the intensity of vibration directly transmitted through the connection device, and helps to protect the overall vibration isolation performance of the double-layer vibration isolation system from being weakened by the installation point.
[0017] (4) When the equipment needs to be disassembled for maintenance or replacement, simply loosen the secondary fasteners and the primary fasteners in sequence. The elastic element rebounds and helps to release the pre-tightening, so that the locking parts can be easily removed and the constraint on the equipment legs can be released. The entire disassembly and assembly process does not require destructive operation and does not damage the equipment and connecting devices themselves, which greatly facilitates the later maintenance and repair of the equipment.
[0018] (5) The overall structure of the device is compact and highly integrated, with low requirements for installation space. The frame structure composed of the base plate, vertical plate and horizontal plate has good rigidity, providing a stable reference for clamping and positioning. Through the design of clamping blocks, positioning holes and other features, it can achieve stable clamping and precise alignment of different specifications of support legs or vibration isolators, ensuring installation repeatability accuracy, strong operability and practicality. Attached Figure Description
[0019] Figure 1 This is an exploded view of the structure from the main perspective of this utility model; Figure 2 for Figure 1 A top-view structural diagram; Figure 3 This is a front view structural diagram of the application of this utility model between the main air compressor and the raft frame of a ship.
[0020] Reference numerals: 1. Base plate; 2. Base plate connecting hole; 3. Vertical plate; 4. Marine main air compressor; 5. Horizontal plate; 6. Connecting column; 7. Connecting plate; 8. Primary fastener; 9. Elastic element; 10. Secondary fastener; 11. Abutment plate; 12. Primary hole; 13. Secondary hole; 14. Tertiary hole; 15. Clamping block; 16. Arc-shaped clamping surface; 17. Internal threaded hole; 18. Float; 19. Base. Detailed Implementation
[0021] The specific technical solutions of this utility model are further described below with reference to the accompanying drawings, so as to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.
[0022] Example 1, referring to Figure 1-3 A connection device for a double-layer vibration isolation structure of a ship's main air compressor, comprising: The base plate 1 is formed into a roughly square plate structure and is horizontally arranged. The base plate 1 has several base plate connecting holes 2, which can be circular through holes. The base plate 1 is provided with blind holes for the front end of the connecting post of the vertical locking member to be inserted. A pair of upright plates 3 are formed into a roughly square plate structure and are symmetrically and vertically fixed to the top surface of the middle part of the base plate 1. The space between the pair of upright plates 3 forms a horizontal clamping space. The spacing between them can be selected according to the usage requirements. The legs of the ship's main air compressor 4 can be inserted into this horizontal clamping space. A horizontal locking hole is opened in the middle of each upright plate 3. A horizontal locking member is inserted in the horizontal locking hole to achieve horizontal locking inside the horizontal clamping space. The horizontal locking members on both sides of the two upright plates 3 can be clamped from the left and right sides. A pair of horizontal plates 5, which are square plate-shaped structures, are symmetrically fixed horizontally on the top surface of the vertical plate 3. The space between each horizontal plate 5 and the bottom plate 1 forms a vertical clamping space. A vertical locking hole is provided in the middle of each horizontal plate 5. A vertical locking member is inserted in the vertical locking hole to achieve vertical locking inside the vertical clamping space. The vertical locking member can clamp from top to bottom. Both the horizontal and vertical locking components include a connecting post 6, a connecting plate 7, a primary fastener 8, an elastic element 9, and a secondary fastener 10. The connecting post 6 has a front end near the center of the base plate 1 and a rear end. An abutment plate 11 is fixed to the outer circumferential surface of the middle portion of the connecting post 6. The connecting post 6 is generally cylindrical, and the abutment plate 11 is generally circular. The connecting plate 7 is fixed to the walls of the horizontal and vertical locking holes by the primary fastener 8. A through hole for the connecting post 6 to pass through is provided in the middle of the connecting plate 7. The elastic element 9 is sleeved on the outer circumferential surface of the rear end of the connecting post 6, with one end abutting against the abutment plate 11 and the other end abutting against the connecting plate 7. The elastic element 9 can be a compression spring or a spring. The secondary fastener 10 is fixed to the end face of the rear end of the connecting post 6 by the connecting plate 7. The primary fastener 8 and the secondary fastener 10 can be bolts. Both the horizontal and vertical lock holes are three-stage stepped holes. The three-stage stepped holes consist of a first-stage hole 12, a second-stage hole 13, and a third-stage hole 14, arranged in ascending order of inner diameter and interconnected with each other. Their distance from the center of the base plate 1 is from near to far. The outer diameter of the connecting post 6 is equal to the inner diameter of the first-stage hole 12, the outer diameter of the abutment plate 11 is equal to the inner diameter of the second-stage hole 13, and the outer diameter of the connecting plate 7 is equal to the inner diameter of the third-stage hole 14. The specific inner diameter values can be selected according to the usage requirements. It also includes a pair of clamping blocks 15, which can be square block-shaped structures and are symmetrically arranged in the transverse clamping space. An arc-shaped clamping surface 16 is provided on one side that is close to each other. The arc-shaped clamping surface 16 can be arc-shaped. An internal thread hole 17 is provided on the other side. An external thread is provided on the outer peripheral surface of the front end of the connecting post 6 of the transverse locking member, which is threaded to the internal thread hole 17. The legs of the ship's main air compressor 4 within the horizontal and vertical clamping spaces are clamped by transverse and vertical locking components that penetrate the vertical plate 3 and the horizontal plate 5.
[0023] The connection device for the double-layer vibration isolation structure of the ship's main air compressor 4 in Example 1 is used as follows: When we apply this connecting device to the ship's main air compressor 4 and the floating raft 18, we can first prepare two sets of connecting devices. First, install the first set of connecting devices on the outriggers of the main air compressor. Then, place the ship's main air compressor 4 with the connecting device installed on the floating raft 18 and fix the base plate 1 of the connecting device to the top surface of the floating raft 18 with bolts and fasteners. Then, install the second set of connecting devices on the outriggers at the bottom of the floating raft 18. Finally, place a square base 19 under the floating raft 18 and fix the second set of connecting devices on the outriggers of the floating raft 18 to the top surface of the base 19 with bolts and fasteners. This completes the multi-layer composite vibration damping structure, realizing multi-level attenuation of vibration energy during the operation of the ship's main air compressor 4 and effectively suppressing the transmission of horizontal vibration.
Claims
1. A connection device for a double-layer vibration isolation structure of a ship's main air compressor, characterized in that: It includes; The base plate has several base plate connection holes; A pair of upright plates are symmetrically and vertically fixed to the top surface of the middle part of the base plate. The space between the pair of upright plates forms a horizontal clamping space. A horizontal locking hole is opened in the middle of each upright plate. A horizontal locking component is inserted in the horizontal locking hole to achieve horizontal locking inside the horizontal clamping space. A pair of horizontal plates are symmetrically fixed to the top surface of the vertical plate. The space between each horizontal plate and the bottom plate forms a vertical clamping space. A vertical locking hole is opened in the middle of each horizontal plate. A vertical locking component is inserted in the vertical locking hole to achieve vertical locking inside the vertical clamping space. Both the horizontal and vertical locking components include a connecting post, a connecting plate, a primary fastener, an elastic element, and a secondary fastener. The connecting post has a front end near the center of the base plate and a rear end. An abutment plate is fixed to the outer circumference of the middle portion of the connecting post. The connecting plate is fixed to the walls of the horizontal and vertical locking holes by the primary fastener, and a through hole for the connecting post to pass through is provided in the middle of the connecting plate. The elastic element is sleeved on the outer circumference of the rear end of the connecting post, with one end abutting against the abutment plate and the other end abutting against the connecting plate. The secondary fastener is fixed to the end face of the rear end of the connecting post by the connecting plate. The outriggers of the ship's main air compressor within the horizontal and vertical clamping spaces are clamped by transverse and vertical locking components that penetrate the vertical and horizontal plates.
2. The connection device for a double-layer vibration isolation structure of a ship's main air compressor according to claim 1, characterized in that: Both the horizontal and vertical lock holes are three-stage stepped holes. The three-stage stepped holes consist of first-stage holes, second-stage holes, and third-stage holes arranged in ascending order of inner diameter and interconnected with each other. Their distance from the center of the base plate increases from near to far.
3. The connection device for a double-layer vibration isolation structure of a ship's main air compressor according to claim 2, characterized in that: The outer diameter of the connecting post is equal to the inner diameter of the primary hole, the outer diameter of the abutment plate is equal to the inner diameter of the secondary hole, and the outer diameter of the connecting plate is equal to the inner diameter of the tertiary hole.
4. The connection device for a double-layer vibration isolation structure of a ship's main air compressor according to claim 2, characterized in that: It also includes a pair of clamping blocks, which are symmetrically arranged in the transverse clamping space. An arc-shaped clamping surface is opened on one side of the blocks that are close to each other, and an internal threaded hole is opened on the other side. The outer peripheral surface of the front end of the connecting column of the transverse locking member is provided with an external thread that is threadedly connected to the internal threaded hole.
5. The connection device for a double-layer vibration isolation structure of a ship's main air compressor according to claim 1, characterized in that: The base plate has a blind hole for inserting the front end of the connecting post of the vertical locking component.