A large marine bearing eccentric adjustment sleeve that is easy to install.

Abstract

This utility model relates to the field of marine bearing technology, specifically to a large marine bearing eccentric adjustment sleeve that facilitates centering and installation. It includes a bearing housing body, an outer eccentric ring, an inner eccentric ring, an eccentric ring structure, and a locking structure. The outer and inner eccentric rings form a double eccentric ring assembly. The outer eccentric ring is rotatably connected to the center of the bearing bush, and the inner eccentric ring is rotatably connected to the center of the outer eccentric ring. Both the outer and inner eccentric ring structures are eccentric ring structures. An inner ring protrusion is provided on the inner wall of the fixing ring, and an outer ring protrusion is fixedly connected to the outer wall of the fixing ring. Two set screws are threaded onto the outer ring protrusion. Limiting rings are fixedly connected to both the front and rear sides of the fixing ring, and eight insertion holes are provided on the side of the limiting rings. This utility model features an eccentric ring structure, and the double eccentric ring assembly combines coarse and fine adjustment functions, enabling precise centering and effectively compensating for accumulated errors generated during ship construction and installation.

Description

Technical Field

[0001] This utility model belongs to the field of marine bearing technology, specifically relating to a large marine bearing eccentric adjustment sleeve that is easy to align and install. Background Technology

[0002] Marine bearing housings are key components in marine mechanical systems used to support and fix bearings. They mainly bear axial thrust and rotational loads and are commonly found in structures such as hydro-generator sets, diesel engines, and propeller shaft systems.

[0003] However, existing marine bearing housings often lack the function of eccentric adjustment. Accumulated errors during ship construction and installation can easily cause shaft misalignment, often requiring repeated hoisting, disassembly of bearings and grinding of shims, causing inconvenience during installation. Therefore, there is an urgent need for a large marine bearing eccentric adjustment sleeve that is easy to align and install to solve the above problems. Utility Model Content

[0004] In order to overcome the above-mentioned technical problems, the purpose of this utility model is to provide a large marine bearing eccentric adjustment sleeve that is easy to install in a center, so as to solve the problem mentioned in the background art that the existing marine bearing seats often do not have the function of eccentric adjustment, and the cumulative errors generated during ship construction and installation can easily cause shaft misalignment.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a large marine bearing eccentric adjustment sleeve that is easy to align and install, comprising a bearing housing body, an outer eccentric ring, an inner eccentric ring, an eccentric ring structure, and a locking structure. The bearing housing body includes a bearing bush. The outer eccentric ring and the inner eccentric ring constitute a double eccentric ring assembly. The outer eccentric ring is rotatably connected to the middle of the bearing bush, and the inner eccentric ring is rotatably connected to the middle of the outer eccentric ring. Both the outer eccentric ring and the eccentric ring structure are eccentric ring structures. The eccentric ring structure includes a fixing ring. An inner ring protrusion is provided on the inner wall of the fixing ring. An outer ring protrusion is fixedly connected to the outer wall of the fixing ring. Two set screws are threadedly connected to the outer ring protrusion. The locking structure includes a limiting ring and a wrench. Limiting rings are fixedly connected to both the front and rear sides of the fixing ring. Eight insertion holes are opened on the side of the limiting ring. Two insertion rods are fixedly connected to the outer wall of the wrench, and the insertion rods are inserted into the insertion holes.

[0006] Preferably, a hexagonal nut is fixedly connected to the outer wall of the set screw.

[0007] Preferably, the outer wall of the outer ring protrusion of the outer eccentric ring is fitted with the inner wall of the bearing bush of the bearing housing body, and the inner wall of the inner ring protrusion of the outer eccentric ring is fitted with the outer wall of the outer ring protrusion of the inner eccentric ring.

[0008] Preferably, the center of the inner ring convex plate of the outer eccentric ring is offset by a distance A from the center of the outer ring convex plate, and the center of the inner ring convex plate of the inner eccentric ring is offset by a distance B from the center of the outer ring convex plate.

[0009] Preferably, the inner wall of the inner ring protrusion of the inner eccentric ring is in contact with the outer ring of the bearing.

[0010] Preferably, the set screw of the outer eccentric ring abuts against the inner wall of the bearing bush, and the set screw of the inner eccentric ring abuts against the inner wall of the inner ring protrusion of the outer eccentric ring.

[0011] Preferably, the limiting ring of the inner eccentric ring abuts against the front and rear sides of the inner ring protrusion of the outer eccentric ring, and the limiting ring of the outer eccentric ring abuts against the front and rear sides of the bearing.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This large marine bearing eccentric adjustment sleeve, which facilitates centering and installation, is equipped with an eccentric ring structure. When adjusting the bearing center position, first loosen all the set screws, then insert the wrench lever into the insertion hole of the limiting ring, and rotate the outer eccentric ring and the inner eccentric ring separately or in concert. Due to the eccentric structure, rotating the outer eccentric ring will cause the entire inner eccentric ring and bearing assembly inside to move along a large trajectory, achieving coarse adjustment; rotating the inner eccentric ring will cause the bearing center to move along a smaller trajectory, achieving fine adjustment. Through the synthesis of the eccentric vectors of the two eccentric rings, theoretically, the center of the bearing can be accurately positioned at any position within a circular area with a radius of A+B around the theoretical center of the bearing housing body, thereby achieving stepless precision centering in a two-dimensional plane. The double eccentric ring kit combines coarse and fine adjustment functions, enabling precise centering, effectively compensating for the cumulative errors generated during ship construction and installation, and ensuring the straightness of the entire propulsion shaft system.

[0013] 2. This large marine bearing eccentric adjustment sleeve, which is easy to align and install, is equipped with a locking structure. After alignment, tightening the set screw of the outer eccentric ring causes its end to press against the inner wall of the bearing housing body, using friction to prevent the outer ring from rotating. Similarly, tightening the set screw of the inner eccentric ring causes it to press against the inner wall of the inner ring protrusion of the outer eccentric ring, locking the inner ring. The limiting ring not only plays an axial positioning role, but its eight evenly distributed insertion holes on its side cooperate with the insertion rod on the wrench, providing the operator with multiple evenly distributed force application points. It can be easily inserted and torque can be applied to rotate the heavy eccentric ring. The set screw directly presses against the adjacent parts, generating a strong normal friction force, which effectively prevents the eccentric ring from loosening during equipment operation vibration, ensuring the long-term stability of the adjusted position and guaranteeing transmission safety. Attached Figure Description

[0014] Figure 1 This is a schematic diagram illustrating the use of this utility model; Figure 2 This is a front perspective view of the present utility model; Figure 3 This is a schematic diagram of the exploded structure of this utility model; Figure 4 This is a schematic diagram of the exploded structure of the eccentric ring structure of this utility model; Figure 5 This is a schematic diagram of the exploded structure of the eccentric ring structure of this utility model.

[0015] In the diagram: 1. Bearing housing body; 11. Bearing bush; 2. Outer eccentric ring; 3. Inner eccentric ring; 4. Eccentric ring structure; 41. Fixing ring; 42. Inner ring protrusion; 43. Outer ring protrusion; 44. Set screw; 45. Hexagonal nut; 5. Locking structure; 51. Limiting ring; 52. Insertion hole; 53. Wrench; 54. Insert rod. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-5 This utility model provides an embodiment of a large marine bearing eccentric adjustment sleeve that is easy to align and install. It includes a bearing housing body 1, an outer eccentric ring 2, an inner eccentric ring 3, an eccentric ring structure 4, and a locking structure 5. The bearing housing body 1 includes a bearing bush 11. The outer eccentric ring 2 and the inner eccentric ring 3 form a double eccentric ring assembly. The outer eccentric ring 2 is rotatably connected to the middle of the bearing bush 11, and the inner eccentric ring 3 is rotatably connected to the middle of the outer eccentric ring 2. Both the outer eccentric ring 2 and the eccentric ring structure 4 are eccentric ring structures. The structure includes an eccentric ring structure 4, which includes a fixed ring 41. The inner wall of the fixed ring 41 is provided with an inner ring protrusion 42. The outer wall of the fixed ring 41 is fixedly connected to an outer ring protrusion 43. The outer ring protrusion 43 is threadedly connected to two set screws 44. The locking structure 5 includes a limiting ring 51 and a plug rod 54. The limiting ring 51 is fixedly connected to both the front and rear sides of the fixed ring 41. The side of the limiting ring 51 is provided with eight insertion holes 52. The outer wall of the wrench 53 is fixedly connected to two plug rods 54, and the plug rods 54 are inserted into the insertion holes 52.

[0018] Furthermore, the outer wall of the set screw 44 is fixedly connected to a hexagonal nut 45, which allows the operator to tighten or loosen it using a standard wrench 53, thereby simplifying the locking and unlocking process of the adjusting sleeve.

[0019] Furthermore, the outer wall of the outer ring protrusion 43 of the outer eccentric ring 2 is in contact with the inner wall of the bearing bush 11 of the bearing housing body 1, and the inner wall of the inner ring protrusion 42 of the outer eccentric ring 2 is in contact with the outer wall of the outer ring protrusion 43 of the inner eccentric ring 3. This multi-level contact surface design ensures the effective transmission of force flow and guarantees the stability and coaxiality of each ring during the rotation adjustment process.

[0020] Furthermore, the center of the inner ring convex plate 42 of the outer eccentric ring 2 is eccentrically A away from the center of the outer ring convex plate 43, and the center of the inner ring convex plate 42 of the inner eccentric ring 3 is eccentrically B away from the center of the outer ring convex plate 43. By rotating the two eccentric rings in coordination, the bearing center can be precisely and steplessly adjusted in a two-dimensional plane by using the vector synthesis of eccentricities A and B.

[0021] Furthermore, the inner wall of the inner ring protrusion 42 of the inner eccentric ring 3 fits against the outer ring of the bearing. This design ensures that the final installation position of the bearing is directly determined by the precise positioning of the inner eccentric ring 3, thus ensuring that the adjustment accuracy can be directly applied to the bearing.

[0022] Furthermore, the set screw 44 of the outer eccentric ring 2 abuts against the inner wall of the bearing bush 11, and the set screw 44 of the inner eccentric ring 3 abuts against the inner wall of the inner ring protrusion 42 of the outer eccentric ring 2. Tightening the set screw 44 can generate huge frictional force, thereby effectively preventing the outer eccentric ring 2 or the inner eccentric ring 3 from accidentally loosening or shifting during equipment operation.

[0023] Furthermore, the limiting ring 51 of the inner eccentric ring 3 abuts against the front and rear sides of the inner ring protrusion 42 of the outer eccentric ring 2, and the limiting ring 51 of the outer eccentric ring 2 abuts against the front and rear sides of the bearing bush 11. The limiting ring 51 constrains the axial degree of freedom of each eccentric ring through axial contact, ensuring the axial positioning and stability of the entire eccentric adjustment sleeve in the bearing seat.

[0024] Working principle: When in use, the core of this adjusting sleeve is a double eccentric ring assembly consisting of an outer eccentric ring 2 and an inner eccentric ring 3. There is an eccentricity A between the center of the inner ring convex plate 42 of the outer eccentric ring 2 and the center of the outer ring convex plate 43, and there is an eccentricity B between the center of the inner ring convex plate 42 of the inner eccentric ring 3 and the center of the outer ring convex plate 43. When it is necessary to adjust the center position of the bearing, first loosen all the set screws 44, and then use the wrench 53 to insert the insert 54 into the insertion hole 52 of the limiting ring 51, and rotate the outer eccentric ring 2 and the inner eccentric ring 3 separately or in concert. Due to the eccentric structure, rotating the outer eccentric ring 2 will drive the entire inner eccentric ring 3 and the bearing assembly inside to move along a large trajectory, so as to achieve coarse adjustment.Rotating the inner eccentric ring 3 will cause the bearing's center to move along a small trajectory, achieving fine adjustment. Theoretically, by combining the eccentric vectors of the two eccentric rings, the bearing's center can be precisely positioned at any point within a circular area with radius A+B around the theoretical center of the bearing housing body 1, thus achieving stepless precision alignment in a two-dimensional plane. The double eccentric ring assembly combines coarse and fine adjustment functions, enabling precise alignment and effectively compensating for accumulated errors during shipbuilding and installation, ensuring the straightness of the entire propulsion shaft system. Compared to the traditional shim adjustment method, this structure only requires loosening the set screw 44 and using a wrench... Adjustment can be completed simply by rotating the eccentric ring 53, avoiding the heavy work of repeatedly hoisting and disassembling bearings and grinding shims, greatly improving installation and maintenance efficiency and shortening working time. Once aligned and locked, the structure becomes a rigid whole with good stability, extending the service life of bearings and shafts. The locking and operation functions of the adjusting sleeve are realized through a modular structure integrated on the eccentric ring. Each eccentric ring, outer eccentric ring 2 and inner eccentric ring 3, integrates a complete eccentric ring structure 4 and locking structure 5. The locking function is achieved by the set screw 44. After alignment, tighten the set screw 44 of the outer eccentric ring 2. The inner eccentric ring 3 is pressed against the inner wall of the bearing shell 11 of the bearing housing body 1, using friction to prevent the outer ring from rotating. Similarly, tightening the set screw 44 of the inner eccentric ring 3 makes it press against the inner wall of the inner ring protrusion 42 of the outer eccentric ring 2, locking the inner ring. The limiting ring 51 not only plays an axial positioning role, but its eight evenly distributed insertion holes 52 on its side cooperate with the insertion rod 54 on the wrench 53, providing the operator with multiple evenly distributed force application points, which can be easily inserted and torque applied to rotate the heavy eccentric ring. The set screw 44 directly presses against the adjacent parts, generating a strong normal friction force, effectively preventing the eccentric ring from vibrating during equipment operation. The loosening during adjustment ensures long-term stability of the adjusted position and guarantees transmission safety. The integrated limit ring 51 and dedicated wrench 53 design allow for easy operation of the eccentric ring even in the confined space of a ship's engine room. Eight insertion holes 52 provide multiple angular positions, ensuring the operator can always find a suitable point of force application. This avoids the risks of slippage, damage to parts, or personal injury that may occur with general-purpose tools, making adjustment operations safer, more standardized, and more efficient. No complex structural modifications to the bearing housing body 1 are required; it can simply be installed as a single kit, offering strong versatility and facilitating production and maintenance.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A large marine bearing eccentric adjustment sleeve for easy centering and installation, comprising a bearing housing body (1), an outer eccentric ring (2), an inner eccentric ring (3), an eccentric ring structure (4), and a locking structure (5), characterized in that: The bearing housing body (1) includes a bearing shell (11), and the outer eccentric ring (2) and the inner eccentric ring (3) constitute a double eccentric ring assembly. The outer eccentric ring (2) is rotatably connected to the middle of the bearing shell (11), and the inner eccentric ring (3) is rotatably connected to the middle of the outer eccentric ring (2). The outer eccentric ring (2) and the eccentric ring structure (4) are both structures of the eccentric ring structure (4). The eccentric ring structure (4) includes a fixing ring (41), and the inner wall of the fixing ring (41) is provided with an inner ring protrusion (42). The outer wall of the fixing ring (41) is fixedly connected to the outer ring protrusion (43), and the outer ring protrusion (43) is threadedly connected to two set screws (44). The locking structure (5) includes a limiting ring (51) and a wrench (53). The front and rear sides of the fixing ring (41) are fixedly connected to the limiting ring (51). The side of the limiting ring (51) is provided with eight insertion holes (52). The outer wall of the wrench (53) is fixedly connected to two insertion rods (54), and the insertion rods (54) are inserted into the insertion holes (52).

2. The eccentric adjustment sleeve for large marine bearings that is easy to align and install according to claim 1, characterized in that: The outer wall of the set screw (44) is fixedly connected to the hexagonal nut (45).

3. A large marine bearing eccentric adjustment sleeve for easy centering installation according to claim 1, characterized in that: The outer wall of the outer ring protrusion (43) of the outer eccentric ring (2) is in contact with the inner wall of the bearing bush (11) of the bearing housing body (1), and the inner wall of the inner ring protrusion (42) of the outer eccentric ring (2) is in contact with the outer wall of the outer ring protrusion (43) of the inner eccentric ring (3).

4. A large marine bearing eccentric adjustment sleeve for easy centering installation according to claim 1, characterized in that: The center of the inner ring convex plate (42) of the outer eccentric ring (2) is offset by a distance A from the center of the outer ring convex plate (43), and the center of the inner ring convex plate (42) of the inner eccentric ring (3) is offset by a distance B from the center of the outer ring convex plate (43).

5. A large marine bearing eccentric adjustment sleeve for easy centering installation according to claim 1, characterized in that: The inner wall of the inner ring protrusion (42) of the inner eccentric ring (3) is in contact with the outer ring of the bearing.

6. A large marine bearing eccentric adjustment sleeve for easy centering installation according to claim 1, characterized in that: The set screw (44) of the outer eccentric ring (2) abuts against the inner wall of the bearing (11), and the set screw (44) of the inner eccentric ring (3) abuts against the inner wall of the inner ring protrusion (42) of the outer eccentric ring (2).

7. A large marine bearing eccentric adjustment sleeve for easy centering installation according to claim 1, characterized in that: The limiting ring (51) of the inner eccentric ring (3) abuts against the front and rear sides of the inner ring protrusion (42) of the outer eccentric ring (2), and the limiting ring (51) of the outer eccentric ring (2) abuts against the front and rear sides of the bearing (11).

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