CN104389895B

CN104389895B - Double-direction thrust reverse sliding bearing applied to turbine

Info

Publication number: CN104389895B
Application number: CN201410702918.0A
Authority: CN
Inventors: 马涛; 王慧杰; 郁顺旺; 舒春英; 何建元; 刘庆鹤; 王靖超
Original assignee: HARBIN GUANGHAN GAS TURBINE Co Ltd
Current assignee: HARBIN GUANGHAN GAS TURBINE Co Ltd
Priority date: 2014-11-29
Filing date: 2014-11-29
Publication date: 2017-05-10
Anticipated expiration: 2034-11-29
Also published as: CN104389895A

Abstract

The invention discloses a double-direction thrust reverse sliding bearing applied to a turbine. A reverse thrust bearing and a roller bearing are mounted in a bearing shell together, wherein a thrust plate is mounted on a turbine shaft; an adjusting ring is arranged between the thrust plate and the roller bearing; the thrust bearing is fixed on the bearing shell by bolts; thrust segments of the reverse thrust bearing and the thrust bearing are matched with the thrust surface of the thrust plate. By virtue of the structure of the double-direction thrust bearing, the adjustment of the axial force is omitted; the service life of the bearing is prolonged; the pollution resistance of a unit bearing system is improved; the reliability and safety of the unit are improved.

Description

A kind of turbine reverse slide bearing of two-way thrust

Technical field：

The present invention relates to field of energy source power, specifically a kind of turbine reverse slide bearing of two-way thrust.

Background technology：

In turbine running, the gas of HTHP brings larger axial thrust to unit rotor, and one As ball bearing all cannot bear, the emphasis how balancing axial thrust is always studied.But affect axial force factor compared with Many, between aerodynamic force, sound gaps, the pressure of each chamber, if having vent valve etc., many factors balance axial force and grind Study carefully and bring larger difficulty, therefore consideration thrust bearing bears the axial force produced during unit operation, therefore devise double Axial thrust bearing adds the structure of roller bearing to bear rotor axial power, and has been obtained for practical application, effectively increases axle The life-span held.

The content of the invention：

For the problems referred to above, the present invention is proposed a kind of turbine reverse slide bearing of two-way thrust, is pushed away by two-sided The thrust pad of power disk and both sides is realized bearing the function of bidirectional axial force.

The technical scheme is that：A kind of turbine reverse slide bearing of two-way thrust, including reverse thrust shaft Hold, reverse thrust bearing and roller bearing are installed along with bear box, thrust disc is arranged on turbine wheel shaft, thrust disc and rolling Axis of a cylinder is provided with adjustment ring between holding, thrust bearing is fixed by bolts on bear box, reverse thrust bearing and thrust bearing Thrust pad coordinates with the thrust face of thrust disc；

Reversely thrust bearing is mainly made up of bearing block, middle ring, shading ring and thrust pad, and each part is assembled into On bearing block, it is fixed on gas turbine by bearing block, middle ring and shading ring are arranged on bearing block by screw, middle The different middle ring of the replaceable thickness of ring, shading ring is the support of thrust pad, there is multiple square windows, thrust bearing shoe valve on shading ring Block pin is fixed in the square window of shading ring, pin afterbody counterbore is risen after fixing expands locking, pin and thrust Gap coordinates between tile fragment, and the edge of each square window of shading ring is provided with oil supplying hole, thrust pad surface bit copper alloy it Silver-plated afterwards, the atomizer of the lubricating oil path part connection roller bearing of bearing block a, part connects shading ring by adapter Oil supplying hole.

The structure of thrust bearing is identical with the structure of reverse thrust bearing.

The surface roughness of thrust face is less than 0.2um before and after thrust disc, and surface carries out Nitrizing Treatment.

The present invention has the advantages that：By the structure of two-direction thrust bearing, axial force adjustment is eliminated, improve In the life-span of bearing, unit bearing arrangement resistance tocrocking is improved, improve the reliability and security of unit.

Description of the drawings：

Fig. 1 is the structural representation of the present invention；

The front view of deboost bearing in the present invention of accompanying drawing 2；

Accompanying drawing 3 is the D magnified partial views of accompanying drawing 2；

Accompanying drawing 4 is the A-A profiles of accompanying drawing 2；

Accompanying drawing 5 is the rotation profile of the B-B of accompanying drawing 2；

Accompanying drawing 6 is the rotation profile of the C-C of accompanying drawing 2.

1- deboosts bearing in figure, 2- bear boxes, 3- thrust discs, 4- thrust bearings；5- turbine wheel shafts, 6- adjustment rings, Ring in the middle of 7- roller bearings, 8- atomizers, 9- bearing blocks, 10-, 11- shading rings, 12- thrust pads, 13- oil supplying holes, 14- turns Connect device.

Specific embodiment：

Below in conjunction with the accompanying drawings the invention will be further described：

Combined shown in Fig. 2～Fig. 6 by Fig. 1, a kind of turbine reverse slide bearing of two-way thrust, including reverse thrust Bearing 1, reverse thrust bearing 1 is installed along with bear box 2 with roller bearing 7, and thrust disc 3 is arranged on turbine wheel shaft 5, is pushed away Adjustment ring 6 is provided between power disk 3 and roller bearing 7 has the relative position of thrust bearing for adjusting thrust disc, and thrust bearing 4 is used It is bolted on bear box 2, thrust pad and the thrust face of thrust disc 3 of reverse thrust bearing 1 and thrust bearing 4 are matched somebody with somebody Close, constitute the surface roughness of thrust face before and after slip working face, thrust disc 3, carrying out Nitrizing Treatment increases case hardness, improves Wearability；

Reversely thrust bearing 1 is main is made up of bearing block 9, middle ring 10, shading ring 11 and thrust pad 12, each part It is assembled on bearing block 9, is fixed on gas turbine by bearing block 9, middle ring 10 and shading ring 11 is installed by screw On bearing block 9, middle ring is actually an adjustment ring, when high speed motive force turbine is assembled by ring surface E in the middle of reconditioning To ensure the gap between thrust disc and thrust pad, the different middle ring 10 of the replaceable thickness of middle ring 10, shading ring 11 is The support of thrust pad 12, there is multiple square windows on shading ring 11, the pin of thrust pad 12 is fixed in shading ring 11 Square window in, it is fixed after pin afterbody counterbore is risen expansion locking, gap coordinates between pin and thrust pad 12, it is ensured that watt Block can rotate freely an angle, it is ensured that form wedge-shaped oil film between the face of being slidably matched during unit operation, shading ring 11 The edge of each square window is provided with oil supplying hole 13, silver-plated after the surface bit copper alloy of thrust pad 12, improves the lubrication of tile fragment Property, protect thrust disc not to be scratched, damage while reducing case hardness, the part connection roller of lubricating oil path 15 of bearing block 9 The atomizer 8 of bearing 7 a, part connects the oil supplying hole 13 of shading ring 11 by adapter 14, and oil supplying hole 13 sprays into thrust pad It is lubricated and lowers the temperature with the mating surface of thrust disc.

The structure of thrust bearing 4 is identical with the structure of reverse thrust bearing 1, and difference is that the size of thrust pad is larger, Thrust disc is big with the contact area of tile fragment, and the axial force born is big.

The surface roughness of thrust face is less than 0.2um before and after thrust disc 3, and surface carries out Nitrizing Treatment, increases case hardness, Improve wearability.

During unit operation, the thrust pad of thrust disc and thrust disc both sides composition slip working face, bearing block assembly and every Be used for fuel feeding from ring, thrust pad can rotate freely within the specific limits, it is ensured that during unit operation between the face of being slidably matched shape Wedgewise oil film.

Claims

1. a kind of turbine reverse slide bearing of two-way thrust, including reverse thrust bearing (1), it is characterised in that：Reversely Thrust bearing (1) is installed along with bear box (2) with roller bearing (7), and thrust disc (3) is pushed away on turbine wheel shaft (5) Adjustment ring (6) is provided between power disk (3) and roller bearing (7), thrust bearing (4) is fixed by bolts on bear box (2), instead The thrust pad (12) of axial thrust bearing (1) and thrust bearing (4) coordinates with the thrust face of thrust disc (3)；Reverse thrust bearing (1) main to be made up of bearing block (9), middle ring (10), shading ring (11) and thrust pad (12), each part is assembled into axle In bearing (9), it is fixed on gas turbine by bearing block (9), middle ring (10) and shading ring (11) are arranged on by screw On bearing block (9), middle ring (10) the different middle ring (10) of replaceable thickness, shading ring (11) is propping up for thrust pad (12) Frame, there is multiple square windows on shading ring (11), thrust pad (12) pin is fixed the square window in shading ring (11) In mouthful, pin afterbody counterbore is risen after fixing expands locking, gap coordinates between pin and thrust pad (12), shading ring (11) The edge of each square window is provided with oil supplying hole (13), silver-plated after the bit copper alloy of thrust pad (12) surface, bearing block (9) The atomizer (8) of lubricating oil path (15) part connection roller bearing (7) a, part connects shading ring by adapter (14) (11) oil supplying hole (13).

2. a kind of turbine according to claim 1 reverse slide bearing of two-way thrust, it is characterised in that：Thrust shaft The structure for holding (4) is identical with the structure of reverse thrust bearing (1).

3. a kind of turbine according to claim 1 reverse slide bearing of two-way thrust, it is characterised in that：Thrust disc (3) surface roughness of thrust face is less than 0.2um before and after, and surface carries out Nitrizing Treatment.