CN2352752Y - Asymmetry tiltably-supprted segments bearing - Google Patents

Abstract

The utility model relates to an asymmetric tiltable tile block bearing. The space arrangement of the circumference of a tilt pad is an asymmetric structure; the back of the tile of the upper half tile pad is provided with an adjusting pad block, and the wrapping angle of a lower half-bearing tile pad is greater than the wrapping angle of an upper half-bearing tile pad. In a turbogenerator group, compared with the tile temperature of an ordinary tiltable tile pad bearing, the temperature of the tile of a tiltable bearing with five tile pads adopting the structure can be reduced by about 10%, which is favorable for the safe operation of the turbogenerator group and prolonging the service life of the bearing.

Description

Asymmetric tilting pad bearing

The utility model relates to the tilting-pad bearing in the sliding bearing, is particularly useful for five segmental bearings that incline in the Turbo-generator Set.

At present, in order to guarantee the stability of Turbo-generator Set operation, domestic and international extensive employing is the tilting pad bearing of layout (" tilting pad " meaning is that circumferential reaching axially can freely swing each tile fragment in the garden) symmetrically and evenly, structurally, each tile fragment cornerite is identical, and the machining gap of tile fragment equals assemblage gap.High capacity along with unit, the higher problem of watt temperature has appearred in the tilting pad bearing of this structural type, such as: many domestic units that put into operation comprise the unit from external introduction, 90～100 ℃ of the Wa Wenda of its tilting pad bearing, this is very unfavorable to unit safety operation.

The purpose of this utility model is intended to overcome above-mentioned the deficiencies in the prior art, proposes a kind of asymmetric tilting pad bearing that can effectively reduce tilting pad bearing watt temperature.

Realize the technological scheme of above-mentioned purpose: asymmetric tilting pad bearing, comprise bearing supporting body and the bearing of forming by tile fragment, the positional alignment of tile fragment on circumference is non-symmetry structure, and watt back of each tile fragment has the adjustment cushion block, and the machining gap of tile fragment is greater than assemblage gap.

Tile fragment is five tile fragments, and wherein going up half bearing is three tile fragments, and bottom half-bearing is two tile fragments,

The cornerite of bottom half-bearing tile fragment is greater than the cornerite of first bearing tile.

Adopt the tilting pad bearing of said structure, because this device is that the tile fragment cornerite is greater than the non-symmetry structure of last tile fragment cornerite down, following tile fragment is lighter when bearing specific pressure than symmetrical structure, and during operation, the lubricant oil thickness between rotor and the tile fragment increases; Again owing to adjust the corrective action of cushion block, tile fragment machining gap (tile fragment is processed the poor of circular diameter and root diameter) is greater than assemblage gap (tile fragment is installed the poor of circular diameter and root diameter), one bigger wedge shape is arranged when making lubricant oil enter tiling, increased lubricants capacity, thereby improved lubricated and cooling.After testing, adopt the utility model lower by about 10% than watt temperature drop of common five segmental bearings that incline of same size, very favourable working life to unit safety operation and prolongation bearing.

Below in conjunction with accompanying drawing in detail its structure is described in detail:

Fig. 1 is a lateral structure sectional view of the present utility model.

Embodiment: with reference to Fig. 1, this asymmetric tilting pad bearing is asymmetric five segmental bearings that incline that are used for Turbo-generator Set, comprise, lower bearing support (1,3) and the bearing of forming by five tile fragments, the position of five tile fragments is a non-symmetry structure, wherein going up half bearing is three tile fragments 2, bottom half-bearing is two tile fragments 4, the wrap angle of bottom half-bearing tile fragment 4 greater than the wrap angle of first bearing tile 2 ', each tile fragment (2,4) a watt back has the cushion block 5 of adjustment, adjust on the cushion block 5 pad 6 is arranged, can increase or reduce the quantity of pad 6 according to need of work, owing to adjust the corrective action of cushion block, tile fragment processing radius R greater than tile fragment install radius R ', again because rotor radius r is constant, so the tile fragment machining gap is greater than assemblage gap.When the rotor in the tile fragment (2,4) turned round, the lubricant oil thickness between rotor and the tile fragment increased, and the tile fragment machining gap has a bigger wedge shape when making lubricant oil enter tiling greater than assemblage gap, increased lubricants capacity, thereby had improved lubricated and cooling.

Present embodiment is five segmental bearings, also can increase or reduce tile fragment quantity according to the real work needs.

Claims (3)

1, asymmetric tilting pad bearing comprises bearing supporting body and by the bearing that tile fragment is formed, it is characterized in that: the positional alignment of tile fragment on circumference is non-symmetry structure, and watt back of each tile fragment has the adjustment cushion block.

2, asymmetric tilting pad bearing according to claim 1 is characterized in that: tile fragment is five tile fragments, and wherein going up half bearing is three tile fragments, and bottom half-bearing is two tile fragments,

3, asymmetric tilting pad bearing according to claim 1 and 2, it is characterized in that: the cornerite of bottom half-bearing tile fragment is greater than the cornerite of first bearing tile.

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