CN220134433U - Double-layer insulation tilting pad sliding bearing based on large generator - Google Patents

Abstract

The utility model belongs to the technical field of bearings, and particularly relates to a double-layer insulation tilting pad sliding bearing based on a large generator, which comprises the following components: a bearing seat; the adjusting cushion blocks are provided with a plurality of adjusting cushion blocks and distributed on the outer wall of the bearing seat along the circumferential direction; wherein, adjust the cushion and include: the first insulating sheet is arranged on the outer wall of the bearing seat; the first cushion block is arranged on the first insulating sheet; the second insulating sheet is arranged on the first cushion block; and the second cushion block is arranged on the second insulating sheet. The traditional single-layer insulation is set to be double-layer insulation, so that the traditional single-layer insulation can better protect a generator, and shaft current is prevented from corroding a bearing bush and a rotating shaft of the generator.

Description

Double-layer insulation tilting pad sliding bearing based on large generator

Technical Field

The utility model belongs to the technical field of bearings, and particularly relates to a tilting pad sliding bearing with a double-layer insulation structure for a large-scale generator.

Background

In large turbine generators, structural bearings such as circular, elliptical, and tilting-type shoes are commonly used. For the tilting pad bearing, the swinging of each pad fulcrum is utilized to adapt to the working position of a rotor, so that each pad can form a convergent oil wedge, the oil wedge formed by the pad and the journal can be automatically adjusted under the condition that the operation parameters (load, speed, lubricating oil viscosity and the like) are changed, and the oil film force generated on each pad passes through the fulcrum and the center of the journal, namely, the external load is always kept at one point, thus a tangential component force for whirling the journal is not generated, and the tilting pad bearing is a bearing bush structure with the most advantageous stability in all radial bearings (including three-oil wedge, four-oil wedge, elliptic bearing, cylindrical bearing) in the aspects of stability, bearing capacity, power consumption, temperature rise and the like. Therefore, the tilting pad bearing is widely applied to large-scale generator sets with good stability.

A double-deck insulating bearing frame of publication number CN208581123U, its structural feature lies in: the bearing seat comprises a bearing seat body, wherein the bearing seat body sequentially comprises an outer ring, an outer insulating layer, a middle ring, an inner insulating layer and an inner ring from outside to inside, two sides of the outer insulating layer are respectively attached to the outer ring and the middle ring, and two sides of the inner insulating layer are respectively attached to the middle ring and the inner ring. Through setting up outer insulating layer, interior insulating layer to realize the double-deck insulation to the bearing, however to the tilting pad slide bearing that is used for on the large-scale generator, all generally only possess the individual layer insulating layer now, tilting pad slide bearing that has double-deck insulating layer has not appeared in the market yet at present.

Disclosure of Invention

The utility model aims to provide a tilting pad sliding bearing with a double-layer insulating structure for a large-scale generator, which solves the problems in the prior art.

In order to achieve the above purpose, the following technical scheme is provided: a tilting pad sliding bearing based on a double-layer insulation structure for a large-sized generator, comprising:

a bearing seat;

the adjusting cushion blocks are provided with a plurality of adjusting cushion blocks and distributed on the outer wall of the bearing seat along the circumferential direction;

wherein, adjust the cushion and include:

the first insulating sheet is arranged on the outer wall of the bearing seat;

the first cushion block is arranged on the first insulating sheet;

the second insulating sheet is arranged on the first cushion block;

and the second cushion block is arranged on the second insulating sheet.

In the above technical scheme, further, the first insulating sheet, the first cushion block, the second insulating sheet and the second cushion block have equal heights.

In any of the above technical solutions, further, a plurality of flat-mouth grooves are formed in the outer wall of the bearing seat along the circumferential direction, and each adjusting cushion block is respectively arranged on each flat-mouth groove.

In any of the above technical solutions, further, the first insulating sheet is attached to the flat slot of the bearing seat, and the first insulating sheet and the flat slot are connected through the first fastener;

the first cushion block is attached to the first insulating sheet, and a second fastener with one end located on the first cushion block and the other end inserted into the bearing seat after penetrating through the first insulating sheet is arranged on the first cushion block;

the second insulating sheet is attached to the first cushion block, and a third fastener with one end positioned on the second insulating sheet and the other end embedded into the first cushion block is arranged on the second insulating sheet;

the second cushion block is attached to the second insulating sheet, one end of the second cushion block is located on the second cushion block, and the other end of the second cushion block penetrates through the second insulating sheet and then is embedded into the fourth fastener in the first cushion block.

In any one of the above technical solutions, further, a first insulating sleeve is arranged between the first fastener and the first insulating sheet, a second insulating sleeve is arranged between the second fastener and the first cushion block, a third insulating sleeve is arranged between the third fastener and the second insulating sheet, and a fourth insulating sleeve is arranged between the fourth fastener and the second cushion block;

the first insulating sleeve and the third insulating sleeve have the same structure and are sleeve structures with one end open and the other end closed, the first fastening piece is arranged in the first insulating sleeve, and the third fastening piece is arranged in the third insulating sleeve;

the second insulating sleeve and the fourth insulating sleeve have the same structure and are T-shaped sleeve structures with two open ends, the second insulating sleeve is sleeved on the second fastening piece, and the fourth insulating sleeve is sleeved on the fourth fastening piece.

In any of the above technical solutions, further, the first fastener and the third fastener have the same structure and are both fixing pins.

In any of the above technical solutions, further, the second fastener and the fourth fastener have the same structure and are bolts.

In any of the above technical solutions, further comprising:

the tiles are provided with a plurality of tiles and are distributed on the inner wall of the bearing seat along the circumferential direction.

And the oil nozzle is arranged in the bearing seat and used for providing lubricating oil for the tile.

The beneficial effects of the utility model are as follows: for tilting pad slide bearing, for improving its insulating reliability, make it can be better protect the generator, for this reason set up the bilayer with traditional individual layer insulation and insulate, specifically set up first insulating piece on the outer wall of bearing frame earlier, then set up first cushion on first insulating piece, make first insulating piece firm fixed on the bearing frame through first cushion, but also can play the eccentric degree of adjusting whole bearing hole, on this basis, set up one deck second insulating piece again on first cushion, then set up a second cushion again on the second insulating piece, so play the effect of protection to the second insulating piece through the second cushion. Under the combined action of the first insulating sheet and the second insulating sheet, the insulating effect of the whole tilting pad sliding bearing is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the internal structure of the present utility model;

FIG. 3 is a schematic view of the structure of the adjusting pad of the present utility model;

FIG. 4 is a schematic view of the first insulating sheet, the first pad and the second insulating sheet of the present utility model after being assembled;

FIG. 5 is a schematic view of the structure of the first insulating sheet and the first pad of the present utility model after installation;

fig. 6 is a schematic structural view of a first insulating sheet according to the present utility model;

FIG. 7 is a schematic view of the construction of a first fastener of the present utility model;

FIG. 8 is a schematic view of the construction of a second fastener of the present utility model;

reference numerals: 100. a bearing seat; 110. a flat slot; 200. adjusting the cushion block; 210. a first insulating sheet; 220. a first pad; 230. a second insulating sheet; 240. a second cushion block; 250. a first fastener; 251. a first insulating sleeve; 260. a second fastener; 261. a second insulating sleeve; 270. a third fastener; 271. a third insulating sleeve; 280. a fourth fastener; 281. a fourth insulating sleeve; 300. a tile; 400. and an oil nozzle.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly described below with reference to the drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which are obtained by a person skilled in the art based on the embodiments of the present utility model, fall within the scope of protection of the present utility model.

In the description of the present utility model, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments in accordance with the present utility model. For ease of description, the dimensions of the various features shown in the drawings are not drawn to actual scale. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the authorization specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Example 1:

as shown in fig. 1 to 8, the present embodiment provides a double-layer insulating tilting pad sliding bearing based on a large-sized generator, including:

a bearing housing 100;

the tiles 300 are plural and are arranged on the inner wall of the bearing seat 100 along the circumferential direction;

the oil spray nozzle 400 is arranged in the bearing seat 100 and is used for providing lubricating oil for the tile 300;

the adjusting cushion blocks 200 are provided with a plurality of eccentric degrees which are distributed on the outer wall of the bearing seat 100 along the circumferential direction, and the eccentric degrees of the inner holes of the bearing can be adjusted through the adjusting cushion blocks 200 so as to meet the requirement of the weight center deviation of the installation shaft;

wherein, adjust cushion 200 includes:

a first insulating sheet 210 disposed on an outer wall of the bearing housing 100;

a first pad 220 disposed on the first insulating sheet 210;

a second insulating sheet 230 disposed on the first pad 220;

and a second pad 240 disposed on the second insulating sheet 230. The first insulating sheet 210, the first pad 220, the second insulating sheet 230, and the second pad have equal length and equal height.

In this technical scheme, to the tilting pad sliding bearing, in order to improve its insulating effect, make it better protect the generator, for this reason will traditional individual layer insulation set up double-deck insulation, specifically set up first insulating piece 210 on the outer wall of bearing frame 100 first, then set up first cushion 220 on first insulating piece 210, make first insulating piece 210 firm fixed on bearing frame 100 through first cushion 220, and can also play the eccentric degree of adjusting whole bearing hole, on this basis, set up one deck second insulating piece 230 again on first cushion 220, then set up a second cushion 240 again on second insulating piece 230, so play the effect of protection to second insulating piece 230 through second cushion 240. Under the combined action of the first insulating sheet 210 and the second insulating sheet 230, the insulating effect of the entire tilt pad sliding bearing is improved.

Example 2:

the present embodiment provides a double-layer insulation tilting pad sliding bearing based on a large-sized generator, which has the following technical features in addition to the technical scheme of the above embodiment.

As shown in fig. 2-6, in the present embodiment, the outer wall of the bearing housing 100 has a plurality of flat slots 110 formed along the circumferential direction, and each adjustment pad 200 is disposed on each flat slot 110.

Wherein, the first insulating sheet 210 is attached to the flat slot 110 of the bearing seat 100, and the two are connected by the first fastener 250;

the first pad 220 is attached to the first insulating sheet 210, and the first pad 220 is provided with a second fastener 260 with one end located thereon and the other end inserted into the bearing seat 100 after passing through the first insulating sheet 210;

the second insulating sheet 230 is attached to the first pad 220, and a third fastener 270 with one end located thereon and the other end embedded in the first pad 220 is provided on the second insulating sheet 230;

the second spacer 240 is attached to the second insulating sheet 230, and a fourth fastener 280 having one end located thereon and the other end inserted into the first spacer 220 after passing through the second insulating sheet 230 is disposed on the second spacer 240.

Specifically, a first insulating sleeve 251 is disposed between the first fastener 250 and the first insulating sheet 210, a second insulating sleeve 261 is disposed between the second fastener 260 and the first pad 220, a third insulating sleeve 271 is disposed between the third fastener 270 and the second insulating sheet 230, and a fourth insulating sleeve 281 is disposed between the fourth fastener 280 and the second pad 240;

wherein the first insulating sleeve 251 and the third insulating sleeve 271 have the same structure, and are sleeve structures with one end open and the other end closed, the first fastening member 250 is disposed in the first insulating sleeve 251, and the third fastening member 270 is disposed in the third insulating sleeve 271;

the second insulating sleeve 261 has the same structure as the fourth insulating sleeve 281, and is a T-shaped sleeve structure with two open ends, the second insulating sleeve 261 is sleeved on the second fastening piece 260, and the fourth insulating sleeve 281 is sleeved on the fourth fastening piece 280.

In this technical scheme, because the bearing frame 100 is circular structure, its outer wall is convex, for the installation of convenient adjustment cushion 200 to and make adjustment cushion 200 can be firm fix on bearing frame 100, offered plain end groove 110 on the outer wall of bearing frame 100 for this reason, concretely, plain end groove 110 adopts and erects a plane that the mode formed of cutting, through setting up adjustment cushion 200 on this plane, ensures the installation strength of whole adjustment cushion 200.

For the first insulating sheet 210 and the second insulating sheet 230, in order to realize omnibearing insulation, a first insulating sleeve 251, a second insulating sleeve 261, a third insulating sleeve 271 and a fourth insulating sleeve 281 are provided, when the first insulating sheet 210 is installed, mounting holes are formed around the first insulating sheet 210, blind holes corresponding to the mounting holes are formed in the flat slot 110 of the bearing seat 100, then the first insulating sleeve 251 is embedded into the mounting holes of the first insulating sheet 210, then the first fastening piece 250 is embedded into the first insulating sleeve 251, the first insulating sheet 210 is clamped on the bearing seat 100, then the mounting holes are continuously formed at other positions of the first insulating sheet 210, and threaded holes are formed in the bearing seat 100, the second insulating sleeve 261 is embedded into the mounting holes of the first insulating sheet 210 after penetrating through the first cushion block 220, and then the second fastening piece 260 is inserted into the threaded holes of the second insulating sleeve 261, wherein the second insulating sleeve 261 is embedded into the mounting holes of the first insulating sheet 210, and the first insulating sheet 210 is completely free from dead angle. The second insulating sheet 230 and the second spacer 240 are mounted in the same manner as the first insulating sheet 210 and the second spacer 240, and will not be described in detail herein.

Of course, in order to facilitate the installation of the entire adjusting pad 200, the installation holes of the first insulating sheet 210, the second insulating sheet 230, the first pad 220, and the second pad 240 may be machined first.

As shown in fig. 4 to 8, in the present embodiment, the first fastening member 250 and the third fastening member 270 are optimized to have the same structure and are both fixing pins; the second fastener 260 and the fourth fastener 280 are identical in structure and are both bolts.

In the present embodiment, the fixing pin is used as a fastening member, so that the first insulating sheet 210 can be fastened to the bearing housing 100, and the second insulating sheet 230 can be fastened to the first pad 220; however, the fixing of the first insulating sheet 210 and the second insulating sheet 230 may be performed by the second fastening member 260 and the fourth fastening member 280.

Specifically, the second fastening member 260 is screwed on the bearing seat 100 after passing through the first insulating sheet 210, that is, the second fastening member 260 fixes the first insulating sheet 210 simultaneously while fixing the first cushion block 220, so that the first insulating sheet 210 does not need to be additionally fixed by bolts, and the fixing pin is directly used for limiting, thereby not only being convenient for installation, but also reducing the production cost; the fourth fastener 280 and the second fastener 260 have the same function, fix the second spacer 240 to the first spacer 220 by bolts, and fix the second insulating sheet 230 to the first spacer 220 at the same time, so that the stability of the entire adjusting spacer 200 assembled to the bearing housing 100 can be secured.

The embodiments of the present utility model have been described above with reference to the accompanying drawings, in which the embodiments of the present utility model and features of the embodiments may be combined with each other without conflict, the present utility model is not limited to the above-described embodiments, which are merely illustrative, not restrictive, of the present utility model, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are protected by the present utility model.

Claims (9)

1. A dual-layer insulated tilting pad sliding bearing based on a large generator, comprising:

a bearing block (100);

and an adjusting pad (200) having a plurality of outer walls distributed on the outer wall of the bearing housing (100) in the circumferential direction;

the adjusting cushion block (200) is characterized by comprising:

a first insulating sheet (210) provided on the outer wall of the bearing housing (100);

a first pad (220) disposed on the first insulating sheet (210);

a second insulating sheet (230) disposed on the first pad (220);

and a second pad (240) disposed on the second insulating sheet (230).

2. The double-layer insulation tilting pad sliding bearing based on the large-scale generator according to claim 1, wherein the first insulation sheet (210), the first cushion block (220), the second insulation sheet (230) and the second cushion block have equal length and equal height.

3. The double-layer insulation tilting pad sliding bearing based on the large-scale generator according to claim 1, wherein the outer wall of the bearing seat (100) is provided with a plurality of flat-mouth grooves (110) which are formed along the circumferential direction, and each adjusting cushion block (200) is respectively arranged on each flat-mouth groove (110).

4. A double-layer insulating tilting pad sliding bearing based on a large-scale generator according to claim 3, characterized in that,

the first insulating sheet (210) is attached to the flat slot (110) of the bearing seat (100), and the first insulating sheet and the flat slot are connected through a first fastener (250);

the first cushion block (220) is attached to the first insulating sheet (210), and a second fastening piece (260) with one end located on the first cushion block (220) and the other end inserted into the bearing seat (100) after penetrating through the first insulating sheet (210) is arranged on the first cushion block;

the second insulating sheet (230) is attached to the first cushion block (220), and a third fastener (270) with one end positioned on the second insulating sheet (230) and the other end embedded into the first cushion block (220) is arranged on the second insulating sheet;

the second cushion block (240) is attached to the second insulating sheet (230), one end of the second cushion block (240) is located on the second cushion block, and the other end of the second cushion block passes through the second insulating sheet (230) and then is embedded into the fourth fastener (280) in the first cushion block (220).

5. The double-layer insulation tilting pad sliding bearing based on the large-scale generator according to claim 4, wherein a first insulation sleeve (251) is arranged between the first fastening piece (250) and the first insulation sheet (210), a second insulation sleeve (261) is arranged between the second fastening piece (260) and the first cushion block (220), a third insulation sleeve (271) is arranged between the third fastening piece (270) and the second insulation sheet (230), and a fourth insulation sleeve (281) is arranged between the fourth fastening piece (280) and the second cushion block (240);

the first insulating sleeve (251) and the third insulating sleeve (271) have the same structure and are sleeve structures with one end open and the other end closed, the first fastening piece (250) is arranged in the first insulating sleeve (251), and the third fastening piece (270) is arranged in the third insulating sleeve (271);

the second insulating sleeve (261) and the fourth insulating sleeve (281) are identical in structure and are of T-shaped sleeve structures with two open ends, the second insulating sleeve (261) is sleeved on the second fastening piece (260), and the fourth insulating sleeve (281) is sleeved on the fourth fastening piece (280).

6. The double-layer insulating tilting pad sliding bearing based on large-scale generator according to claim 5, wherein the first fastener (250) and the third fastener (270) are identical in structure and are both fixing pins.

7. The double-layer insulated tilting pad sliding bearing based on large-scale generator according to claim 5, wherein the second fastener (260) and the fourth fastener (280) are identical in structure and are both bolts.

8. A double insulated tilting pad sliding bearing based on large generators according to any of claims 1-7, further comprising:

the tiles (300) are provided in a plurality and are distributed on the inner wall of the bearing seat (100) along the circumferential direction.

9. The dual insulated tilting pad sliding bearing based on large generator of claim 8, further comprising:

and the oil nozzle (400) is arranged in the bearing seat (100) and is used for providing lubricating oil for the tile (300).