Bearing bush for hydraulic generator

Abstract

The bearing bush comprises a lower shaft sleeve and an upper shaft sleeve, the upper shaft sleeve is installed at the upper end of the lower shaft sleeve, first tiles and second tiles are installed on the inner side of the lower shaft sleeve and the inner side of the upper shaft sleeve, and the two sets of second tiles are distributed in a bilateral symmetry mode relative to the midpoint of the first tile. Tile opening plane connecting blocks are fixedly installed on the left sides and the right sides of the lower shaft sleeve and the upper shaft sleeve correspondingly. The bearing bush for the hydro-generator adopts an assembled structure, one group of bearing bushes consists of one arc-shaped first tile and two spliced second tiles, and only the damaged tiles need to be replaced when the bearing bushes are worn and need to be replaced, so that the processing cost of an enterprise is reduced, and the production efficiency is improved. The front and rear sides of the lower shaft sleeve and the upper shaft sleeve are provided with the limiting plates for limiting the tiles, and the front and rear limiting plates can effectively prevent the first tile and the second tile from shifting front and back, so that the mounting stability of the bearing bush and the bearing capacity of the bearing bush to a shaft part are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing bushes, in particular to a bearing bush for a hydro-generator. Background Art

[0002] The blades of the hydro-turbine generator are key components of the turbine. Their main function is to convert the kinetic energy of the water flow into mechanical energy, thereby driving the generator to generate electricity. The bearings inside the hydro-turbine generator are crucial components of the generator set, supporting and lubricating the rotating parts of the generator set. Their performance directly affects the operating efficiency and stability of the generator set.

[0003] A bearing shell with application number CN202220674518.3 has a first and a second circumferentially opposite end of the bearing shell, an oil groove extending along the circumference of the bearing shell is provided on the inner surface of the bearing shell, an oil hole connected to the oil groove is provided on the bearing shell, a first chamfer is provided at the corner between the first circumferential edge plane and the inner surface, a second chamfer is provided at the corner between the second circumferential edge plane and the inner surface, the tail end of the oil groove extends to the first chamfer and is connected to the first chamfer, and the head end of the oil groove and the second chamfer are staggered in the circumferential direction of the bearing shell. The utility model can reduce oil leakage, reduce the power consumption of the oil pump, and is conducive to maintaining the low fuel performance of the engine. It also has a high ability to discharge impurities in the oil, can prevent the inner surface of the bearing shell from being scratched by impurities, and is conducive to maintaining the normal operation of the bearing shell.

[0004] The bearing structure adopts an integrated design. Although it can reduce vibration noise and improve rotation accuracy, it has high manufacturing and maintenance costs. It is less applicable in some cost-sensitive situations or where frequent bearing replacement is required, and cannot meet actual production needs.

[0005] In view of the above problems, it is urgent to carry out innovative design based on the original bearing structure of the hydro-generator. Utility Model Content

[0006] The purpose of the present utility model is to provide a bearing for a hydro-turbine generator, so as to solve the problem proposed in the above background technology that the bearing structure adopts an integrated design, which can reduce vibration noise and improve rotation accuracy, but has high manufacturing cost and high maintenance cost. It has low applicability in some cost-sensitive occasions or where frequent replacement of bearings is required, and cannot meet the actual production needs.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a bearing for a hydro-turbine generator, comprising a lower sleeve and an upper sleeve, wherein the upper sleeve is installed on the upper end of the lower sleeve, and a first tile and a second tile are installed on the inner sides of the lower sleeve and the upper sleeve, and the second tile is symmetrically distributed in two groups about the midpoint of the first tile.

[0008] Preferably, the left and right sides of the lower sleeve and the upper sleeve are fixedly mounted with shoe surface connection blocks, and positioning lips are provided on the inner sides of the shoe surface connection blocks.

[0009] Preferably, the outer sides of the lower sleeve and the upper sleeve are connected to the limit plates by fastening bolts, and two groups of limit plates are symmetrically arranged front to back about the midpoint of the lower sleeve and the upper sleeve, and the front and rear groups of limit plates are fitted with the first tile and the second tile.

[0010] Preferably, the first tile and the second tile have oblique chamfers formed on their inner sides, and the oblique chamfers on the inner side of the first tile coincide with the oblique chamfers on the adjacent second tile.

[0011] Preferably, the limit plate on the outer side of the upper sleeve is fixedly connected to an oil filling port.

[0012] Preferably, the oil filling port is flush with the oblique chamfer on the inner side of the first tile and the midpoint line of the oblique chamfer of the adjacent second tile.

[0013] Preferably, an oil line groove is opened on the inner side of the first tile, and the upper and lower openings of the oil line groove and the chamfered corners are a through structure.

[0014] Compared with the prior art, the beneficial effect of the present invention is that the bearing bush for the hydro-generator is provided with:

[0015] 1. Easy-to-disassemble structure. The bearing structure of this structure adopts an assembled structure. A set of bearings consists of an arc-shaped first tile and two spliced second tiles. When the bearing is worn and needs to be replaced, only the damaged tile needs to be replaced, thereby reducing the processing cost of the enterprise;

[0016] Furthermore, limit plates are installed on the front and rear sides of the lower and upper sleeves to limit the position of the tiles. The two sets of limit plates can effectively prevent the front and rear positions of the first and second tiles from being offset, thereby improving the installation stability of the bearing and the load-bearing capacity of the shaft.

[0017] Furthermore, when the bearing needs to be disassembled, it is only necessary to rotate the fastening bolt to separate the limit plate on one side from the outer side of the upper sleeve or the lower sleeve, and then the damaged bearing can be taken out, thereby reducing the cost and time of maintenance;

[0018] 2. Lubrication structure. In this structure, bevel chamfers are provided in the first tile and the adjacent second tile. The lubricating oil is injected into the oil filling gap formed by the two adjacent groups of bevel chamfers through the oil filling port, so that the lubricating oil flows into the oil line groove along the oil filling gap. The lubricating oil is spread throughout the inner side of the bearing through the oil line groove to form a lubricating oil film. The generated lubricating oil film reduces the friction between the bearing and the journal, thereby improving the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the separation structure of the lower shaft sleeve and the upper shaft sleeve of the utility model;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the lower shaft sleeve of the utility model;

[0022] Figure 4 This is a schematic diagram of the exploded structure of the lower shaft sleeve of the utility model;

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the first tile and the second tile of the utility model;

[0024] Figure 6 This is a schematic diagram of the three-dimensional structure of the limiting plate of the utility model;

[0025] Figure 7 This is a front view structural diagram of the first tile and the second tile of the utility model.

[0026] In the figure: 1. Lower sleeve; 2. Upper sleeve; 3. Flat connection block of the tile mouth; 4. Positioning lip; 5. First tile; 6. Second tile; 7. Chamfer; 8. Limit plate; 9. Fastening bolt; 10. Oil filling port; 11. Oil line groove. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 7 The utility model provides a technical solution: a bearing bush for a hydro-generator, comprising:

[0029] Example 1: Figure 1-Figure 5 The technical solution shown in the figure, the utility model provides a technical solution: a bearing bush for a hydro-turbine generator, which discloses: a lower sleeve 1 and an upper sleeve 2, the upper end of the lower sleeve 1 is mounted with the upper sleeve 2, the inner sides of the lower sleeve 1 and the upper sleeve 2 are mounted with a first tile 5 and a second tile 6, and the second tile 6 is symmetrically distributed in two groups about the midpoint of the first tile 5;

[0030] The lower sleeve 1 and the upper sleeve 2 are fixedly mounted with tile face connection blocks 3 on both the left and right sides, and a positioning lip 4 is provided on the inner side of the tile face connection blocks 3; the outer sides of the lower sleeve 1 and the upper sleeve 2 are connected to limit plates 8 by fastening bolts 9, and two groups of limit plates 8 are symmetrically arranged front to back about the midpoint of the lower sleeve 1 and the upper sleeve 2, and the front and rear groups of limit plates 8 are in contact with the first tile 5 and the second tile 6; the first tile 5 and the second tile 6 are provided with oblique chamfers 7 on the inner sides, and the oblique chamfer 7 on the inner side of the first tile 5 coincides with the oblique chamfer 7 on the adjacent second tile 6;

[0031] In this structure, the lower sleeve 1 and the upper sleeve 2 are positioned on the inner side of the unit support seat through the positioning lip 4 on the outside of the sleeve plane connecting block 3, and the bearing structure on the inner side of the lower sleeve 1 and the upper sleeve 2 adopts an assembled structure. A group of bearings consists of an arc-shaped first tile 5 and two spliced second tiles 6. When the bearings are worn and need to be replaced, only the damaged tiles need to be replaced, thereby reducing the processing cost of the enterprise. Limiting plates 8 are installed on the front and rear sides of the lower sleeve 1 and the upper sleeve 2 to limit the bearings. The two sets of front and rear limiting plates 8 can effectively avoid the front and rear position offset of the first tile 5 and the second tile 6, thereby improving the installation stability of the bearings and the load-bearing capacity of the shaft. When the bearings need to be disassembled, it is only necessary to rotate the fastening bolts 9 to separate the limiting plate 8 on one side from the outside of the upper sleeve 2 or the lower sleeve 1, and the damaged bearings can be removed, thereby reducing the cost and time of maintenance.

[0032] Example 2: Figure 1-Figure 2 、 Figure 5-Figure 7 The technical solution shown in the figure, the utility model provides a technical solution: a bearing bush for a hydro-generator, which discloses: a limit plate 8 on the outer side of the upper sleeve 2 is fixedly connected to an oil filling port 10; the oil filling port 10 is flush with the midpoint line of the oblique chamfer 7 on the inner side of the first tile 5 and the oblique chamfer 7 of the adjacent second tile 6; an oil line groove 11 is opened on the inner side of the first tile 5, and the upper and lower openings of the oil line groove 11 are connected to the oblique chamfer 7.

[0033] In this structure, the first tile 5 and the adjacent second tile 6 are both provided with chamfers 7. The lubricating oil is injected into the oil filling gap formed by the two adjacent groups of chamfers 7 through the oil filling port 10, so that the lubricating oil flows into the oil line groove 11 along the oil filling gap. The lubricating oil is spread throughout the inner side of the bearing through the oil line groove 11 to form a lubricating oil film. The generated lubricating oil film reduces the friction between the bearing and the journal, thereby improving the service life of the bearing.

[0034] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bearing bush for a hydro-turbine generator, comprising a lower shaft sleeve (1) and an upper shaft sleeve (2), wherein the upper shaft sleeve (2) is mounted on the upper end of the lower shaft sleeve (1), characterized in that: A first tile (5) and a second tile (6) are installed on the inner sides of the lower shaft sleeve (1) and the upper shaft sleeve (2), and two groups of the second tiles (6) are symmetrically distributed about the midpoint of the first tile (5).

2. A bearing bush for a hydro-generator according to claim 1, characterized in that: The lower shaft sleeve (1) and the upper shaft sleeve (2) are both fixedly mounted with tile face plane connection blocks (3) on the left and right sides, and a positioning lip (4) is provided on the inner side of the tile face plane connection block (3).

3. The bearing bush for a hydro-generator according to claim 1, characterized in that: The outer sides of the lower shaft sleeve (1) and the upper shaft sleeve (2) are connected to the limiting plates (8) via fastening bolts (9), and two groups of limiting plates (8) are symmetrically arranged in front and back about the midpoint of the lower shaft sleeve (1) and the upper shaft sleeve (2), and the front and rear groups of limiting plates (8) are in contact with the first tile (5) and the second tile (6).

4. The bearing bush for a hydro-generator according to claim 1, characterized in that: The first tile (5) and the second tile (6) are provided with oblique chamfers (7) on their inner sides, and the oblique chamfers (7) on the inner side of the first tile (5) coincide with the oblique chamfers (7) on the adjacent second tile (6).

5. The bearing bush for a hydro-generator according to claim 1, characterized in that: The limit plate (8) on the outside of the upper shaft sleeve (2) is fixedly connected to an oil filling port (10).

6. A bearing bush for a hydro-generator according to claim 5, characterized in that: The oil filling port (10) is flush with the midpoint line of the oblique chamfer (7) on the inner side of the first tile (5) and the oblique chamfer (7) of the adjacent second tile (6).

7. The bearing bush for a hydro-generator according to claim 1, characterized in that: An oil line groove (11) is provided on the inner side of the first tile (5), and the upper and lower openings of the oil line groove (11) and the chamfer (7) are connected to each other.

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