CN102699658B - Disassembling method for roll bearing and eccentric hanger of roll bearing - Google Patents

Abstract

The invention relates to the field of PQF tandem mill roll maintenance and particularly relates to a disassembling method for a roll bearing and an eccentric hanger of the roll bearing. The disassembling method provided by the invention has the characteristics that the eccentric hanger is adopted to offset the eccentric state of barycenter of a bearing box, so that the bearing box can be correctly hanged in an automatic way during the disassembling process of the bearing without the help from a worker. The disassembling method comprises the following steps of: 1, positioning the bearing box and the eccentric hanger in a matching manner; 2, putting a backing ring in a gland seam allowance of the bearing box; 3, hanging the bearing box and putting the bearing box on a press head of a hydraulic press; 4, starting the hydraulic press and leading the bearing box to rise to push against a top bar of the hydraulic press; and 5, continuously starting the hydraulic press and ejecting the bearing. The eccentric hanger comprises a support press plate, a connecting rod and a ring; and deviation valve H of the axle wire of the connecting rod from the axial wire of the support press plate is consistent with the deviation vale of the barycenter of the bearing box from the axis of a roll. Compared with the prior art, the beneficial effects of the invention are that the disassembling method is more convenient and easier to operate, can reduce labor intensity of operators, can improve the work efficiency and can ensure the safety of operators 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

PQF tandem mill is 6 three-high mills introducing from Germany, it is the capital equipment on φ 177 hot rolled seamless steel tube production lines, continuous rolling mill roller device is the important tool of rolling seamless steel pipe, breaker roll device assembly precision requires high, especially assembling after roll mandrel to, radial-play amount, the quality of its assembly quality directly affects seamless steel pipe product quality, therefore after reaching the standard grade rolling one-period (3-5 days), roll all want breaker roll device to overhaul, to ensure to meet 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, dismantles bearing program as follows in maintenance process:

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

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

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

6) take off bearing (7), be put in Active workings, to be cleaned, check, return dress;

7) bearing housing (6) is levered up and penetrates steel wire rope:

8) bearing housing (6) is hung oneself from hydraulic press, is put in Active workings, to be cleaned, check, return dress.

The weak point of above-mentioned method for dismounting is, because the barycenter of bearing housing departs from roll axle center, when bearing removal, bearing housing is crooked, essential could righting with hand, want the moment with hand, backing plate, cushion block just to be put simultaneously, relatively waste time and energy and dangerous.

Summary of the invention

The method for dismounting and the eccentric suspender thereof that the object of this invention is to provide a kind of roll bearing, overcome the deficiencies in the prior art, makes the disassembly process of roll bearing more simple and easy to do, reduces labor intensity, and ensures job safety, increases work efficiency.

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

A method for dismounting for roll bearing, adopts a kind of eccentric suspender to offset the eccentric state of bearing housing barycenter, just makes bearing removal process middle (center) bearing case energy automatic hanging, does not need people to hold up, and its concrete operation step is as follows:

1) bearing housing is coordinated to location with eccentric suspender, the suspension ring of eccentric suspender are stretched out by inner hole of shaft sleeve;

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 rises until gasket ring pushes up the upper beam of hydraulic press with pressure head, checks and adjusts gasket ring and bearing housing and avoid crooked and unbalance stress;

5) continue primer fluid press, until bearing is ejected.

The eccentric suspender of described one, comprise backing pressure plate, connecting rod and suspension ring, connecting rod bottom is connected with backing pressure plate is vertical, and connecting rod top is provided with suspension ring, backing pressure plate axis H is departed from described connecting rod axis, and this H value is consistent with the value that the barycenter of bearing housing departs from roll axle center.

Described H value is 60-70mm.

Described backing pressure plate is provided with locating ring, the locating ring center of circle and backing pressure plate axis coinciding, and locating ring mates with inner hole of shaft sleeve.

Compared with prior art, the invention has the beneficial effects as follows: by adopting a kind of eccentric suspender to offset the eccentric state of bearing housing barycenter, make the disassembly process of roll bearing more simple and easy to do, bearing housing with regard to energy automatic hanging just, without with hand steered, the labour intensity that has alleviated operator, has improved operating efficiency, can Reliable guarantee operator's person and device security.

Brief description of the drawings

Fig. 1 is the eccentric suspender example structure of the present invention schematic diagram;

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 prior art middle (center) bearing disassembly status schematic diagram.

In 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

Detailed description of the invention

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:

See Fig. 1, it is the eccentric suspender example structure of the present invention schematic diagram, comprise backing pressure plate 1, connecting rod 2 and suspension ring 3, connecting rod 2 bottoms are connected with the vertical screw thread of backing pressure plate 1, 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 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 difference of different model roll bearing box, the value H that its barycenter departs from roll axle center need determine as calculated, and the eccentric suspender of making like this could meet instructions for use, and in the present embodiment, H selects 66mm.

The method for dismounting of a kind of roll bearing of the present invention, is by adopting above-mentioned eccentric suspender 5 to offset the eccentric state of bearing housing 6 barycenter, just makes bearing 7 unloading process middle (center) bearing casees 6 energy automatic hangings, does not need people to hold up, and its concrete operation step is as follows:

1) bearing housing 6 is coordinated to location with eccentric suspender 5, locating ring coordinates 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) primer fluid press 11, bearing housing 6 rises with pressure head until gasket ring 8 top to the upper beam 12 of hydraulic press, checks and adjusts gasket ring 8 and bearing housing 6 is avoided crooked and unbalance stress, sees Fig. 2;

5) continue primer fluid press 11, until bearing 7 is ejected, see Fig. 3.

Claims (1)

1. a method for dismounting for roll bearing, is characterized in that, adopts a kind of eccentric suspender to offset the eccentric state of bearing housing barycenter, just makes bearing removal process middle (center) bearing case energy automatic hanging, does not need people to hold up, and its concrete operation step is as follows:

1) bearing housing is coordinated to location with eccentric suspender, the suspension ring of eccentric suspender are stretched out by inner hole of shaft sleeve;

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 rises until gasket ring pushes up the upper beam of hydraulic press with pressure head, checks and adjusts gasket ring and bearing housing and avoid crooked and unbalance stress;

5) continue primer fluid press, until bearing is ejected.