Split type bearing seat supporting device for vibration isolation raft frame of propulsion shafting

Abstract

The invention belongs to the field of design of large underwater vehicles, and particularly relates to a split type bearing seat supporting device of a propulsion shafting vibration isolation raft frame. Comprising a supporting mechanism; the supporting mechanism comprises a top block, an adjustable connecting block, a base, a locking base plate and a jackscrew, the base is provided with a slotting structure, and the locking base plate is connected with the base and fixes the base with a raft frame cross beam; the adjustable connecting block is fixed on the base and is provided with a guide hole; the two ends of the ejector block are provided with an inner arc face and a threaded jackscrew hole respectively. One end of the jackscrew is connected with a threaded jackscrew hole in the ejector block, the other end of the jackscrew is matched with a guide hole of the adjustable connecting block, and the ejector block is fixed to the base. The distance between the ejector block and the adjustable connecting block is adjusted through the jackscrew, so that the ejector block compresses the bearing seat and provides support for the bearing seat. The structural rigidity of the split type bearing seat is effectively improved, the distance between structural parts is increased through the threaded jackscrews, reliable supporting is achieved, the original structure of a raft frame is not damaged, and the split type bearing seat has the advantages of being flexible to assemble, easy to operate and high in reliability.

Description

Technical Field

[0001] This invention belongs to the field of large underwater vehicle design, specifically a propulsion shaft vibration isolation raft frame split bearing seat support device. Background Technology

[0002] Currently, in the design of large underwater vehicles, a double-layer vibration isolation system using a raft is commonly used to reduce vibrations generated during propulsion shaft operation. However, due to limitations in processing capabilities and construction costs, the radial bearing housing of the vibration isolation raft is difficult to machine as a single unit. Furthermore, the concentricity requirements between the radial and thrust bearing housings during propulsion shaft assembly are extremely high; if an integral bearing housing is used, fine alignment adjustments cannot be made after machining. In addition, underwater vehicles carry numerous devices, resulting in limited space, especially the stern section, which is constrained by the hydrodynamic shape of the flow-receiving section, making its internal space even smaller. The need for alignment adjustments between the propulsion shaft and the hull further complicates the alignment maneuverability of an integral radial bearing housing raft assembly. Therefore, the radial bearing housing of the vibration isolation raft typically employs a split, single-point support structure. However, the rigidity of a single-point support structure is severely insufficient, and the propulsion shaft rotation inevitably generates pulsating forces. This causes additional vibrations in the single-point support structure during system operation, affecting not only the vehicle's vibration and noise performance but also significantly reducing the reliability and service life of the vibration isolation system. Summary of the Invention

[0003] To address the problem of insufficient structural rigidity in split-type single-point support bearing housings leading to additional vibrations during propulsion shaft system operation, the present invention aims to provide a split-type bearing housing support device for propulsion shaft system vibration isolation rafts. This device can improve the overall rigidity of the split-type single-point support bearing housing, reduce vibrations generated during system operation, and improve system reliability.

[0004] The objective of this invention is achieved through the following technical solution: The present invention provides a split bearing housing support device for a propulsion shaft vibration isolation raft, comprising at least one support mechanism; The support mechanism includes a top block, an adjustable connecting block, a base, a locking pad, and a set screw. The bottom of the base has a slotted structure for assembling the raft frame crossbeam. The locking pad is connected to the base to fix the base to the raft frame crossbeam. The adjustable connecting block is fixed to the upper end of the base and has a guide hole. One end of the top block has an inner arc surface, and the other end has a threaded set screw hole. One end of the set screw is threaded into the threaded set screw hole on the top block, and the other end engages with the guide hole of the adjustable connecting block. By rotating the set screw, the distance between the top block and the adjustable connecting block is adjusted so that the inner arc surface of the top block presses against the bearing seat, providing support for the bearing seat. After adjusting the position of the top block, the top block is fixedly connected to the base.

[0005] The upper surface of the base is provided with an oblong hole. The installation position of the adjustable connecting block relative to the base is adjusted through the oblong hole, so that the inner arc surface of one end of the top block is concentric with the bearing seat.

[0006] The aforementioned propulsion shaft vibration isolation raft split bearing seat support device also includes an anti-loosening plate with a slot structure; the set screw has a polygonal structure, the two ends of the anti-loosening plate are respectively connected to the top block and the base, and the anti-loosening plate is inserted into the polygonal structure of the set screw through the slot structure, and the anti-loosening plate can restrict the rotation of the set screw.

[0007] The slot structure is located on the side of the anti-loosening plate.

[0008] The other end of the set screw is provided with a guide shaft that is inserted into the guide hole of the adjustable connecting block. The set screw is located at the center of the adjustable connecting block, and the vertical center line of the adjustable connecting block passes through the center of the top block.

[0009] The locking pad has a slotted structure that matches the cross-sectional shape of the raft beam.

[0010] The inner arc surface of the top block is designed to conform to the outer shape of the bearing seat, ensuring that the bearing seat is subjected to uniform force.

[0011] The support mechanism can be used individually or as a set.

[0012] The advantages and positive effects of this invention are as follows: 1. This invention effectively improves the structural rigidity of split bearing housings, avoiding the additional vibrations caused by insufficient structural rigidity in single-point supported bearing housings, which affect vibration noise performance and service life, thereby improving system reliability.

[0013] 2. The adjustable connecting block can adjust its position relative to the base, thereby adjusting the relative position of the top block and the bearing seat, ensuring that the bearing seat is subjected to uniform force when multiple support devices are used, and without affecting the alignment of the propulsion shaft system.

[0014] 3. The present invention can install multiple support devices according to actual application requirements, and can provide support for the bearing seat from multiple directions, providing the structural stiffness required by the system in multiple directions to achieve the optimal performance of the system.

[0015] 4. The set screw has a polygonal structure. The anti-loosening plate contacts the opposite side of the polygonal structure through the slot structure, which can restrict the rotation of the set screw, effectively preventing loosening, ensuring the stability of the overall structure, and avoiding the pulsating force generated during the long-term operation of the propulsion shaft system, which may cause the support device to loosen and affect the system performance and life.

[0016] 5. This invention achieves reliable support by conforming to the split bearing housing and increasing the distance between structural components using the threaded set screw principle, without damaging the original raft structure. It has the advantages of flexible assembly, simple operation, and uniform force distribution.

[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0018] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram illustrating the structure and use of a split-type bearing seat support device for a propulsion shaft vibration isolation raft frame according to the present invention; Figure 2 This is an isometric view of the support mechanism in this invention; Figure 3 This is an exploded view of the support mechanism in this invention.

[0020] In the diagram: 1 is the top block; 2 is the adjustable connecting block; 3 is the base; 4 is the locking pad; 5 is the set screw; 6 is the anti-loosening plate; 7 is the bearing seat; 8 is the raft frame crossbeam; 9 is the support mechanism. Detailed Implementation

[0021] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] See Figures 1 to 3As shown, the present invention provides a split bearing seat support device for a propulsion shaft vibration isolation raft, including at least one support mechanism 9; the support mechanism 9 includes a top block 1, an adjustable connecting block 2, a base 3, a locking pad 4, and a set screw 5, wherein the bottom of the base 3 has a slotted structure for assembling the raft beam 8, the locking pad 4 is connected to the base 3, and the base 3 is fixed to the raft beam 8; the adjustable connecting block 2 is fixed to the upper end of the base 3, and a guide hole is provided on the adjustable connecting block 2; one end of the top block 1 has an inner arc surface, and the other end has a threaded set screw hole; one end of the set screw 5 is threadedly connected to the threaded set screw hole on the top block 1, and the other end is engaged with the guide hole of the adjustable connecting block 2. By rotating the set screw 5, the distance between the top block 1 and the adjustable connecting block 2 is adjusted so that the inner arc surface of the top block 1 presses against the bearing seat 7, providing support for the bearing seat 7. After adjusting the position of the top block 1, the top block 1 and the base 3 are fixedly connected by screws.

[0023] Furthermore, the upper end face of the base 3 is provided with a waist-shaped hole, and the installation position of the adjustable connecting block 2 relative to the base 3 is adjusted through the waist-shaped hole, so that the inner arc surface of one end of the top block 1 is concentric with the bearing seat 7.

[0024] In an embodiment of the present invention, the other end of the set screw 5 is provided with a guide shaft that is inserted into the guide hole of the adjustable connecting block 2, ensuring that the set screw 5 is located at the center of the adjustable connecting block 2, and that the vertical center line of the adjustable connecting block 2 passes through the center of the top block 1. The inner arc surface of the top block 1 is designed to conform to the outer shape of the bearing seat 7, thereby adjusting the position of the top block 1 relative to the bearing seat 7, ensuring that the bearing seat 7 is subjected to uniform force when multiple support mechanisms 9 are used.

[0025] Specifically, the slotted structure of the base 3 matches the cross-sectional shape of the raft beam 8, and is assembled onto the raft beam 8 through this slotted structure. The locking pad 4 also has a slotted structure that matches the cross-sectional shape of the raft beam 8. The locking pad 4 is connected and fixed to the base 3 by screws, and the base 3 is fixed to the raft beam 8 by friction.

[0026] Furthermore, the propulsion shaft vibration isolation raft split bearing seat support device provided by the present invention also includes an anti-loosening plate 6 with a slot structure; the set screw 5 is provided with a polygonal structure, and the two ends of the anti-loosening plate 6 are respectively connected to the top block 1 and the base 3 by screws, and the anti-loosening plate 6 is inserted into the polygonal structure of the set screw 5 through the slot structure. The anti-loosening plate 6 can restrict the rotation of the set screw 5, effectively playing the role of anti-loosening, and avoiding the displacement of the top block due to the loosening of the set screw after the system has been running for a long time, which would affect the support effect. The multiple connection and fixing methods together increase the structural stability and connection reliability.

[0027] Specifically, the slot structure is located on the side of the anti-loosening plate 6.

[0028] In this embodiment, the support mechanism 9 can be used alone or as a set, and can provide support for the split bearing housing from multiple directions other than the connection point of the split bearing housing, thereby enhancing its overall rigidity.

[0029] The present invention provides a split-type bearing housing support device for a propulsion shaft vibration isolation raft, the working principle of which is as follows: First, fix the base 3 to the raft beam 8 using the locking pad 4. Rotating the set screw 5 increases the distance between the top block 1 and the adjustable connecting block 2, allowing the top block 1 to contact the bearing seat 7. Then, adjust the position of the adjustable connecting block 2 to position the top block 1 in a suitable location, ensuring even force distribution. Fix the adjustable connecting block 2 to the base 3, and rotate the set screw 5 to apply preload, providing structural support for the bearing seat 7. When the bearing seat 7 is also positioned opposite a support mechanism 9, the set screw 5 needs to be rotated gradually to ensure that the preload of the two opposing support mechanisms 9 remains essentially consistent during application. After adjusting the preload, install the anti-loosening plate 6. Its slot structure restricts the rotation of the set screw 5, preventing loosening and ensuring the stability and reliability of the support mechanism 9 during propulsion shaft operation.

[0030] In summary, the present invention provides a split-type bearing housing support device for a propulsion shaft vibration isolation raft, which features flexible assembly, simple operation, and high reliability. The invention utilizes the principle of adjusting the distance between structural components using a threaded set screw structure to construct a rigid support between the bearing housing 7 and the vibration isolation raft beam 8. This improves the overall stiffness of the bearing housing 7 relative to the raft beam 8 from multiple directions, preventing additional vibration caused by insufficient stiffness in the bearing housing 7. The design of the anti-loosening plate 6 effectively increases the reliability of the threaded set screw structure, thereby improving the reliability of the entire support device and ensuring optimal performance during long-term system operation. The present invention solves the problem of low stiffness in split-type bearing housings, effectively reducing additional vibrations caused by insufficient stiffness in the vibration isolation raft structure.

[0031] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A split-type bearing housing support device for a propulsion shaft vibration isolation raft frame, characterized in that, Includes at least one support structure (9); The support mechanism (9) includes a top block (1), an adjustable connecting block (2), a base (3), a locking pad (4), and a set screw (5). The bottom of the base (3) has a slotted structure for assembling the raft beam (8). The locking pad (4) is connected to the base (3) to fix the base (3) to the raft beam (8). The adjustable connecting block (2) is fixed to the upper end of the base (3) and has a guide hole. One end of the top block (1) is provided with a guide hole. It has an inner arc surface and a threaded set screw hole at the other end; one end of the set screw (5) is threadedly connected to the threaded set screw hole on the top block (1), and the other end is engaged with the guide hole of the adjustable connecting block (2). By rotating the set screw (5), the distance between the top block (1) and the adjustable connecting block (2) is adjusted so that the inner arc surface of the top block (1) presses against the bearing seat (7) to provide support for the bearing seat (7). After adjusting the position of the top block (1), the top block (1) is fixedly connected to the base (3).

2. The propulsion shaft vibration isolation raft frame split bearing seat support device according to claim 1, characterized in that, The upper surface of the base (3) is provided with a waist-shaped hole. The installation position of the adjustable connecting block (2) relative to the base (3) is adjusted through the waist-shaped hole so that the inner arc surface of one end of the top block (1) is concentric with the bearing seat (7).

3. The propulsion shaft vibration isolation raft frame split bearing seat support device according to claim 1, characterized in that, It also includes a locking plate (6) with a slot structure; The set screw (5) has a polygonal structure. The two ends of the anti-loosening plate (6) are connected to the top block (1) and the base (3) respectively. The anti-loosening plate (6) is inserted into the polygonal structure of the set screw (5) through a slot structure. The anti-loosening plate (6) can restrict the rotation of the set screw (5).

4. The propulsion shaft vibration isolation raft frame split bearing seat support device according to claim 3, characterized in that, The slot structure is disposed on the side of the anti-loosening plate (6).

5. The propulsion shaft vibration isolation raft frame split bearing seat support device according to claim 1, characterized in that, The other end of the set screw (5) is provided with a guide shaft that is inserted into the guide hole of the adjustable connecting block (2). The set screw (5) is located at the center of the adjustable connecting block (2), and the vertical center line of the adjustable connecting block (2) passes through the center of the top block (1).

6. The propulsion shaft vibration isolation raft frame split bearing seat support device according to claim 1, characterized in that, The locking pad (4) has a slotted structure that matches the cross-sectional shape of the raft beam (8).

7. The propulsion shaft vibration isolation raft frame split bearing seat support device according to claim 1, characterized in that, The inner arc surface of the top block (1) is designed to conform to the outer shape of the bearing seat (7) to ensure that the bearing seat (7) is subjected to uniform force.

8. The propulsion shaft vibration isolation raft frame split bearing seat support device according to claim 1, characterized in that, The support mechanism (9) can be used alone or as a set.

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