Large water-lubricated bearing copper bush structure

Abstract

The utility model relates to a large-scale water-lubricated bearing copper bush structure which comprises a supporting sleeve, combination keys and a stop ring, the supporting sleeve is sleeved on a water-lubricated bearing bush, two pairs of combination keys are arranged in the supporting sleeve, and the supporting sleeve is connected with an upper water-lubricated bearing bush and a lower water-lubricated bearing bush through the two pairs of combination keys; the flange end of the supporting sleeve is provided with a stop ring for axially limiting the bearing bush of the water-lubricated bearing; a multi-step surface structure is arranged on the outer surface of the supporting sleeve. According to the copper bush structure of the large water-lubricated bearing, a double-combination-key structure is adopted, and the function that the upper bearing bush and the lower bearing bush of the water-lubricated bearing can be separately and independently maintained and replaced is achieved; an axial inclined wedge mounting structure and an end connecting hole structure designed by the movable key in the combined key improve the convenience of mounting or dismounting the movable key and the reliability of equipment; a multi-step surface and a step guide angle structure are designed on the outer surface of the supporting sleeve, so that axial mounting and dismounting of the water-lubricated bearing are facilitated; the supporting sleeve flange is provided with a threaded hole, so that the water-lubricated bearing is convenient to disassemble.

Description

Technical Field

[0001] The utility model relates to a copper sleeve structure of a water-lubricated bearing, in particular to a copper sleeve structure for a large-diameter stern shaft water-lubricated bearing of a ship power propulsion system. Background Art

[0002] With the increasing attention of countries around the world to the International Convention for the Prevention of Pollution from Ships, more and more ship stern bearings choose water-lubricated bearings, using natural water instead of mineral oil as the lubricating medium to solve environmental protection problems. In order to facilitate the installation, maintenance and replacement of water-lubricated bearings, some water-lubricated bearings are added with copper support sleeves and keys outside the bearing bush. The typical structures are shown in Figure 1 (a) and (b) of the figure. The support sleeve is used for the radial limit and support of the bearing bush, and the key is used to prevent the circumferential rotation of the bearing bush. The existing typical ship water-lubricated bearings have the following limitations: due to the use of a single key or a single combined key design structure, when the key is disassembled for maintenance, the entire bearing bush is loosened and removed at the same time. After the polymer bearing bush is removed, it is deformed, resulting in the upper half of the bearing bush with less wear cannot be reinstalled and used, and only the entire bearing bush can be replaced and maintained together, increasing the cost of replacement and maintenance; the movable key part in the combined key has no axial self-fixing function and needs to rely on external additional components to achieve the axial fixing function; the outer surface structure of the support sleeve is simple, which is a single-diameter cylindrical surface. When the shaft diameter of the water-lubricated bearing is large and the axial length of the outer surface of the support sleeve is long, it is difficult to axially install the water-lubricated bearing into the bearing hub on site.

[0003] Therefore, starting from the design principle of minimizing the cost of repairing and replacing the bearing bush of the water-lubricated bearing, it is necessary to design a copper sleeve structure of the water-lubricated bearing that is convenient for on-site installation of large-diameter water-lubricated bearings, and improve the maintenance performance and reliability of the entire water-lubricated bearing. Summary of the Invention

[0004] In order to improve the overall maintenance performance of the water-lubricated bearing, reduce the difficulty of on-site installation or disassembly, and improve the product reliability, the utility model provides a copper sleeve structure of a large water-lubricated bearing. A double combined key structure is designed in the new large copper sleeve of the water-lubricated bearing to realize the function of separately and independently repairing and replacing the upper and lower bearing bushes of the water-lubricated bearing; the movable key in the combined key has a self-fixing function, which improves the reliability of the connection of the movable key and the water-lubricated bearing device; a stepped surface structure is designed on the outer surface of the support sleeve in the copper sleeve of the water-lubricated bearing, which reduces the axial installation or disassembly sliding distance of the water-lubricated bearing and improves the convenience of installation or disassembly.

[0005] To achieve the above object, the technical solution adopted by the present utility model is: a copper bushing structure for a large water-lubricated bearing, comprising a support sleeve, a stop ring, and a combination key. The support sleeve is sleeved on the water-lubricated bearing bushing. Two pairs of combination keys are provided inside the support sleeve and are connected to the upper and lower water-lubricated bearing bushings through the two pairs of combination keys; a stop ring for axially limiting the water-lubricated bearing bushing is provided at the flange end of the support sleeve; a multi-step surface structure is provided on the outer surface of the support sleeve.

[0006] Further, each pair of combination keys includes a fixed key and a movable key. The fixed key is fixedly connected to the support sleeve through a fixed key screw and a pin; the movable key is installed and connected to the fixed key by an axial inclined wedge method.

[0007] Further, a connection hole is provided at the end of the movable key and is fixedly connected to the support sleeve through a movable key bolt.

[0008] Further, a guiding angle is provided at the step of the multi-step surface structure of the support sleeve.

[0009] Further, threaded holes facilitating the disassembly of the water-lubricated bearing are provided on the flange of the support sleeve.

[0010] Further, the stop ring is fixedly connected to the support sleeve through a stop ring screw.

[0011] The beneficial effects of the present utility model are:

[0012] For the copper bushing structure of the large water-lubricated bearing of the present utility model, a double combination key structure is adopted to realize the function of separately and independently repairing and replacing the upper and lower bushings of the water-lubricated bearing; the axial inclined wedge installation structure and the end connection hole structure designed for the movable key in the combination key improve the convenience of installing or disassembling the movable key and the reliability of the equipment; a multi-step surface and a step guiding angle structure are designed on the outer surface of the support sleeve to facilitate the axial installation and disassembly of the water-lubricated bearing; threaded holes are provided on the flange of the support sleeve to facilitate the disassembly of the water-lubricated bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the structure of a typical stern shaft water-lubricated bearing in the prior art;

[0014] Among them: (a) is a typical structure one, (b) is a typical structure two;

[0015] Figure 2 A cross-sectional view of the copper bushing structure of the large water-lubricated bearing of the present utility model;

[0016] Figure 3 is Figure 2 the view in the direction of A of

[0017] Figure 4 is Figure 2 the cross-sectional view along B-B and the partial cross-sectional view along C-C in DETAILED DESCRIPTION OF THE INVENTION

[0018] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] As Figures 2 to 4 shown, a large water-lubricated bearing copper bushing structure provided by an embodiment of the present utility model includes a support sleeve 1, a fixed key 2, a movable key 3, a fixed key screw 4, a pin 5, a stop ring 6, a stop ring screw 7, and a movable key bolt 8.

[0020] The outer surface of the support sleeve 1 in the water-lubricated bearing copper bushing structure is designed as a multi-step surface structure, which greatly shortens the axial installation or disassembly distance of the support sleeve 1 of the large shaft diameter water-lubricated bearing in the bearing hub, and a guiding angle is provided at the step to reduce the difficulty of on-site installation or disassembly of the water-lubricated bearing. At the same time, an installation through hole 9 is provided on the flange of the support sleeve 1, and the water-lubricated bearing is axially fixedly connected to the bearing hub through the through hole 9 with fasteners; a threaded hole 10 is provided on the flange of the support sleeve 1 for jacking out or pulling out the support sleeve 1 of the water-lubricated bearing from the bearing hub to disassemble the water-lubricated bearing.

[0021] In the water-lubricated bearing copper bushing structure, there are two pairs of combined keys. Each pair of combined keys includes a fixed key 2 and a movable key 3, realizing the function of separately and independently repairing and replacing the upper and lower bearing shells of the water-lubricated bearing; the fixed key 2 is fixedly connected to the support sleeve 1 through the fixed key screw 4 and the pin 5; the movable key 3 is installed and connected to the fixed key 2 in an axial inclined wedge manner. In the early stage of axial installation of the movable key 3, the circumferential direction of the movable key 3 is not pressed against the fixed key 2 and the bearing shell 11, and the axial installation force is small. When the last section of the installation distance is reached, the circumferential direction of the movable key 3 is in full contact with the fixed key 2 and the bearing shell, and then the axial installation force is large. Conversely, during disassembly, the axial inclined wedge connection structure between the movable key 3 and the fixed key 2 greatly reduces the installation or disassembly difficulty of the movable key and the connected bearing shell 11; the radial limit of the movable key 3 is realized by the connected fixed key 2 and the support sleeve 1; a connection hole is provided at the end of the movable key 3, and the movable key 3 is fixedly connected to the support sleeve 1 through the movable key bolt 8, realizing the self-axial fixing function of the movable key 3.

[0022] A stop ring 6 is provided in the water-lubricated bearing copper bushing structure. The stop ring 6 is fixedly connected to the support sleeve 1 through the stop ring screw 7 to prevent the bearing shell 11 in the water-lubricated bearing from axially moving out of the equipment, realizing the axial limit function of the bearing shell of the water-lubricated bearing.

Claims

1. A copper bushing structure for a large water-lubricated bearing, characterized in that: It includes a support sleeve, a stop ring, and a combination key. The support sleeve is sleeved on the water-lubricated bearing bush. There are two pairs of combination keys arranged inside the support sleeve, and it is connected to the upper and lower water-lubricated bearing bushes through the two pairs of combination keys; a stop ring for axially limiting the water-lubricated bearing bush is provided at the flange end of the support sleeve; a multi-step surface structure is provided on the outer surface of the support sleeve.

2. The copper bushing structure of the large water-lubricated bearing according to claim 1, characterized in that: Each pair of combination keys includes a fixed key and a movable key. The fixed key is fixedly connected to the support sleeve through fixed key screws and pins; the movable key is installed and connected to the fixed key in an axial inclined wedge manner.

3. The copper bushing structure of the large water-lubricated bearing according to claim 1, characterized in that: A connection hole is provided at the end of the movable key and is fixedly connected to the support sleeve through a movable key bolt.

4. The copper bushing structure of the large water-lubricated bearing according to claim 1, characterized in that: A guiding angle is provided at the step of the multi-step surface structure of the support sleeve.

5. The copper bushing structure of the large water-lubricated bearing according to claim 1, wherein: Threaded holes facilitating the disassembly of the water-lubricated bearing are provided on the flange of the support sleeve.

6. The copper bushing structure of the large water-lubricated bearing according to claim 1, wherein: The stop ring is fixedly connected to the support sleeve through stop ring screws.

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