CN102699658A

CN102699658A - Method for disassembling roller bearing and eccentric lifting appliance thereof

Info

Publication number: CN102699658A
Application number: CN201210158481XA
Authority: CN
Inventors: 宋世岭; 宋亮; 王恩锁; 王凯; 马雷; 赵翔; 赵奇峰; 胡小冬
Original assignee: Angang Steel Co Ltd
Current assignee: Angang Steel Co Ltd
Priority date: 2012-05-21
Filing date: 2012-05-21
Publication date: 2012-10-03
Anticipated expiration: 2032-05-21
Also published as: CN102699658B

Abstract

The invention relates to the field of roll maintenance of PQF continuous rolling mills, in particular to a method for disassembling roll bearings and an eccentric spreader, which is characterized in that an eccentric spreader is used to offset the eccentric state of the center of mass of the bearing box, so that the bearing box is disassembled during the bearing disassembly process It can be lifted automatically without human support. The steps are as follows: 1) Position the bearing box with the eccentric spreader; 2) Put the backing ring into the gland of the bearing box; 3) Lift the bearing box and place it on the hydraulic machine. 4) Start the hydraulic press, and the bearing box rises to the upper beam of the hydraulic press; 5) Continue to start the hydraulic press, and the bearings are ejected. The above-mentioned eccentric spreader includes a supporting plate, a connecting rod and a lifting ring. The central axis of the connecting rod deviates from the central axis H of the supporting plate. Compared with the prior art, the invention has the beneficial effects of being simpler and easier to implement, reducing the labor intensity of the operator, improving work efficiency, and reliably ensuring the safety of the operator and equipment.

Description

A kind of method for dismounting of roll bearing and eccentric suspender thereof

Technical field

The present invention relates to the maintenance of PQF continuous rolling mill roller field, particularly a kind of method for dismounting of roll bearing and eccentric suspender thereof.

Background technology

The PQF tandem mill is 6 three-high mills introducing from Germany; It is the capital equipment on the φ 177 hot rolled seamless steel tube production lines; The continuous rolling mill roller device is the important tool of rolling seamless steel pipe, and it is high that breaker roll device assembly precision requires, especially the roll mandrel after the assembling to; The radial-play amount; Therefore the good and bad seamless steel pipe product quality that directly influences of its assembly quality all wants the breaker roll device to overhaul after roll is reached the standard grade rolling one-period (3-5 days), to guarantee to satisfy the rolling mill practice requirement.

Conventional repair method is that one group of roll device of every maintenance needs three pincers worker breaker roll devices to dismantle, clean and its bearing clearance is adjusted, and sees Fig. 4, and dismounting bearing program is following in the maintenance process:

1) select suitable (can bearing a be extruded) backing plate (14) to be placed on the pressure head of hydraulic press (11) earlier;

2) be placed on the pressure head of hydraulic press with crane and steel wire rope (9) bearing housing (6) of slinging;

3) withdraw from steel wire rope (9);

4) between the upper beam (12) of bearing housing (6) one sides and hydraulic press, add cushion block (13);

5) the primer fluid press is depressed bearing (7);

6) take off bearing (7), be put in the operation place, to be cleaned, inspection, return dress;

7) bearing housing (6) levered up penetrate steel wire rope:

8) bearing housing (6) is hung oneself down from hydraulic press, be put in the operation place, to be cleaned, inspection, return dress.

The weak point of above-mentioned method for dismounting is, because the barycenter of bearing housing departs from the roll axle center, bearing housing is crooked during bearing removal, must just can set upright with hand, wants simultaneously constantly with hand backing plate, cushion block are just put, and relatively wastes time and energy and dangerous.

Summary of the invention

The method for dismounting and the eccentric suspender thereof that the purpose of this invention is to provide a kind of roll bearing overcome the deficiency of prior art, make the disassembly process of roll bearing more simple and easy to do, reduce labor intensity, and guarantee job safety, increase work efficiency.

For solving the problems of the technologies described above, technical scheme of the present invention is:

A kind of method for dismounting of roll bearing adopts a kind of eccentric suspender to offset the eccentric state of bearing housing barycenter, and bearing removal process middle (center) bearing case can just be hung automatically, does not need the people to hold up, and its concrete operations step is following:

1) bearing housing is cooperated the location with eccentric suspender, the suspension ring of eccentric suspender are stretched out by the axle sleeve endoporus;

2) gasket ring is put into the gland seam of bearing housing;

3) be put on the pressure head of hydraulic press with the crane bearing housing of slinging;

4) primer fluid press, bearing housing rise with pressure head and push up the upper beam of hydraulic press until gasket ring, and inspection and adjustment gasket ring and bearing housing are avoided crooked and unbalance stress;

5) continue the primer fluid press, ejected up to bearing.

Described a kind of eccentric suspender; Comprise backing pressure plate, connecting rod and suspension ring, the connecting rod bottom links to each other with the backing pressure plate is vertical, and the connecting rod top is provided with suspension ring; Backing pressure plate axis H is departed from said connecting rod axis, and this H value is consistent with the value that the barycenter of bearing housing departs from the roll axle center.

Said H value is 60-70mm.

Said backing pressure plate is provided with locating ring, the locating ring center of circle and backing pressure plate axis coinciding, locating ring and axle sleeve endoporus coupling.

Compared with prior art; The invention has the beneficial effects as follows: offset the eccentric state of bearing housing barycenter through adopting a kind of eccentric suspender, make the disassembly process of roll bearing more simple and easy to do, bearing housing just can just hang automatically; Need not with hand steered; Alleviate operator's labour intensity, improved operating efficiency, can reliably guarantee operator's person and device security.

Description of drawings

Fig. 1 is the eccentric suspender example structure of a present invention sketch map;

Fig. 2 is application state one structural representation of the present invention;

Fig. 3 is application state two structural representations of the present invention;

Fig. 4 is a prior art middle (center) bearing disassembly status sketch map.

Among the figure: the eccentric suspender 6-of 1-backing pressure plate 2-connecting rod 3-suspension ring 4-locating ring 5-bearing housing 7-bearing 8-gasket ring 9-steel wire rope 10-axle sleeve 11-hydraulic press 12-upper beam 13-cushion block 14-backing plate

The specific embodiment

Be described further below in conjunction with the accompanying drawing specific embodiments of the invention:

See Fig. 1; Be the eccentric suspender example structure of the present invention sketch map, comprise backing pressure plate 1, connecting rod 2 and suspension ring 3, connecting rod 2 bottoms link to each other with backing pressure plate 1 vertical screw thread; Connecting rod 2 tops are provided with suspension ring 3; The axis H of backing pressure plate 1 is departed from the axis of connecting rod 2, and this H value is consistent with the value that the barycenter of bearing housing departs from the roll axle center, and general H value is 60-70mm.Backing pressure plate 1 is provided with locating ring 4, locating ring 4 centers of circle and backing pressure plate 1 axis coinciding.The shape of different model roll bearing box is different, and the value H that its barycenter departs from the roll axle center needs definite through calculating, and the eccentric suspender of making like this could satisfy instructions for use, H selection 66mm in the present embodiment.

The method for dismounting of a kind of roll bearing of the present invention is through adopting above-mentioned eccentric suspender 5 to offset the eccentric state of bearing housing 6 barycenter, bearing 7 unloading process middle (center) bearing casees 6 can just be hung automatically, do not need the people to hold up, and its concrete operations step is following:

1) bearing housing 6 is cooperated the location with eccentric suspender 5, locating ring cooperates with axle sleeve 10 endoporus, and the suspension ring of eccentric suspender 5 are stretched out by axle sleeve 10 endoporus;

2) gasket ring 8 is put into the gland seam of bearing housing 6;

3) be put on the pressure head of hydraulic press 11 with steel wire rope 9 bearing housing of slinging;

4) the primer fluid press 11, and bearing housing 6 rises with pressure head and pushes up the upper beam 12 of hydraulic press until gasket ring 8, and inspection and adjustment gasket ring 8 are avoided crooked and unbalance stress with bearing housing 6, see Fig. 2;

5) continue primer fluid press 11, ejected, see Fig. 3 up to bearing 7.

Claims

1. A method for dismounting a roll bearing, characterized in that an eccentric spreader is used to counteract the eccentric state of the center of mass of the bearing box, so that the bearing box can be automatically hoisted during the bearing disassembly process without the need for people to support it. The specific operation steps are as follows :

1) Position the bearing housing with the eccentric spreader, and the lifting ring of the eccentric spreader protrudes from the inner hole of the shaft sleeve;

2) Put the backing ring into the gland seam of the bearing box;

3) Use a crane to lift the bearing box and put it on the pressure head of the hydraulic press;

4) Start the hydraulic machine, the bearing box rises with the pressure head until the backing ring reaches the upper beam of the hydraulic press, check and adjust the backing ring and bearing box to avoid skew and uneven force;

5) Continue to start the hydraulic press until the bearing is ejected.

2. An eccentric spreader according to claim 1, characterized in that it comprises a supporting plate, a connecting rod and a lifting ring, the bottom end of the connecting rod is vertically connected with the supporting plate, the top of the connecting rod is provided with a lifting ring, and the connecting rod The axis deviates from the central axis H of the supporting plate, and the value of this H is consistent with the value that the center of mass of the bearing box deviates from the axis of the roll.

3. An eccentric spreader according to claim 2, characterized in that the H value is 60-70mm.

4. An eccentric spreader according to claim 2, characterized in that a positioning ring is provided on the supporting plate, the center of the positioning ring coincides with the axis of the supporting plate, and the positioning ring matches the inner hole of the bushing.