CN101216064A

CN101216064A - Spherical sleeve type tilting pad bearing

Info

Publication number: CN101216064A
Application number: CNA2007100510343A
Authority: CN
Inventors: 孙敏; 杨灵; 刘金芳; 张健; 彭英杰; 喻刚; 强宏志
Original assignee: DEC Dongfang Turbine Co Ltd
Current assignee: DEC Dongfang Turbine Co Ltd
Priority date: 2007-12-29
Filing date: 2007-12-29
Publication date: 2008-07-09

Abstract

The invention provides a sphere sleeve-type pivoted pad bearing, which is provided with the three-layer structure of a sphere pad sleeve, a bearing pad body and a tilting pad. The pad back of a diminished column face has different curvature with the bearing pad body. The sphere pad sleeve is added outside the bearing pad body and between the bearing pad body and a bearing block. The sphere pad sleeve is matched with the bearing pad body through spheres. The invention adopts the structure, and the back of the pad touches the bearing pad body in a linear way, thus significantly reducing the contact stress. Due to the self-potential of the sphere, the carrying surface of the bearing is ensured to adapt to the change of the uplift degree of a rotor so that the carrying surface of the bearing is kept parallel with the rotor all along.

Description

Spherical sleeve type tilting pad bearing

Technical field

The invention belongs to large-scale thermal power equipment, chemical industry equipment and factory steam turbine etc., be used for the supporting part of high speed rotating rotor.

Background technique

The fulcrum at the tile fragment back side of watt radial journal bearing can incline, generally be processed into sphere, tile fragment is some contact (as shown in Figure 1 and Figure 2, Fig. 1 is the tilting-pad bearing of the spherical fulcrum of single layer structure) with contacting of bearing shell body in theory, being in operation makes point of contact place, tile fragment back side stress very high, easily produces wearing and tearing.

Summary of the invention

The objective of the invention is to overcome above-mentioned the deficiencies in the prior art part, a kind of to make the tile fragment back side and contacting of bearing shell body be line contact and design, simultaneously can be along the spherical sleeve type tilting pad bearing that circumferentially freely swings.

The objective of the invention is to realize according to following technical solution: tilting-pad bearing is the three-decker with ball watt cover, bearing shell body and tilting pad, the tile fragment back side and the bearing shell body of narrow cylinder have different curvature, at the external ball watt cover of having set up of bearing shell, cooperate for sphere between ball watt cover and bearing shell body.

Described tile fragment back of the body arc structure is that line contacts with bearing shell body endoporus.

Described ball watt cover is along being circumferentially with the adjustment cushion block.

Advantage of the present invention is: owing to adopt said structure, making the tile fragment back side and contacting of bearing shell body is the line contact, greatly reduce contact stress, along circumferentially can freely swinging, the supporting plane that has guaranteed bearing can adapt to rotor degree of raising change, all the time with the rotor keeping parallelism.

Description of drawings

Fig. 1 is that theoretic to go up that tile fragment contact with the bearing shell body be to put to contact a schematic representation.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is a front view of the present invention.

Fig. 4 is the A-A sectional view of Fig. 3.

Code name implication among the figure: locating stud 13 front and rear oil seals rings 14 balls of the attachment screw of low brass body and second 12 oil seal ring of locating stud 11 bearing shell bodies and bearing shell body watt second 15 ball watt cover of cover is along circumferential adjustment cushion block on attachment screw that low brass overlaps on 6 watts of back ofs the body of attachment screw 5 tilting pads of first 2 ball of 1 bearing shell body watt first 3 ball contact surface, 4 oil seal rings of cover and bearing shell body and the bearing shell body contact surface 7,8 and the locating stud 9,10

Embodiment

With reference to Fig. 3-Fig. 4, spherical sleeve type tilting pad bearing of the present invention is the three-decker with ball watt cover, bearing shell body and tilting pad, tile fragment is arranged in bearing shell body endoporus, ball watt cover and bearing shell body cooperate by sphere can free centering, the degree of raising that can make bearing can adapt to rotor changes, there is different curvature at the tile fragment back side of narrow cylinder for narrower cylinder and with the endoporus of bearing shell body, and making its and contacting of bearing shell body is that line contacts, and can freely swing along circumferential.Earlier second 14 is located in the bearing support with ball watt cover, second 11 puts into lower semisphere watt cover with the bearing shell body again, close the bearing shell body first 1, use the attachment screw and the locating stud 9 of low brass body, on 10 tight bearing shell bodies second, check the situation that contacts of low brass body and ball watt inner room, after surface of contact reaches designing requirement, untie the screw and the locating stud of bearing shell body split, tilting pad 5 is put into the bearing shell body, load onto oil seal ring 13, attachment screw 4 with oil seal ring and bearing shell body is fixed on the bearing shell body, close again the bearing shell body first 1, with attachment screw and locating stud 9,10 location and handle are tight, first 2 closes with ball watt cover then, with the attachment screw of upper and lower hemispheres watt cover and locating stud 7 and 8 with upper and lower hemispheres watt cover tight, the Spherical Clearance of half-watt body and watt inner room in inspections, after waiting to adhere to specification, again tight split screw 7 and 8.

Claims

1. spherical sleeve type tilting pad bearing, it is characterized in that: three-decker with ball watt cover, bearing shell body and tilting pad, the tile fragment back side and the bearing shell body of narrow cylinder have different curvature, at the external ball watt cover of having set up of bearing shell, cooperate for sphere between ball watt cover and bearing shell body.

2. spherical sleeve type tilting pad bearing as claimed in claim 1 is characterized in that: tile fragment back of the body arc structure is that line contacts with bearing shell body endoporus.

3. spherical sleeve type tilting pad bearing as claimed in claim 1 is characterized in that: ball watt cover is along being circumferentially with the adjustment cushion block.