CN2230194Y

CN2230194Y - Roller device with changeable bush

Info

Publication number: CN2230194Y
Application number: CN 95239987
Authority: CN
Inventors: 朱仲明
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-06-15
Filing date: 1995-06-15
Publication date: 1996-07-03
Anticipated expiration: 2005-06-15

Abstract

The utility model discloses a roll device with a composite structure. The utility model is characterized in that one end of the roll core is provided with a shoulder, and the outer part is provided with a roll sleeve which is cast in a bimetal composite centrifugal mode and forms micro-gap fit with the shoulder; the utility model is also provided with a hydraulic lock mechanism composed of a hydraulic nut and a hydraulic nut loop. The utility model has simple structure and convenient operation, a good deal of rare noble metal can be saved, and the work efficiency of a rolling mill can be improved.

Description

Interchangeable edge cover roll device

The utility model relates to a kind of roll device, relates in particular to a kind of body of roll and is edge cover composite construction, and at one end be provided with the roll device of retaining mechanism.

At present, widely used roll, its body of roll and roll neck are an overall structure, it is formed by the static integral cast of same alloy material, though this traditional roll has advantage simple in structure, easy to make, but can not satisfy the wear-resisting requirement of the body of roll and the anti-fracture strength requirement of roll neck synchronously, in case body of roll wearing and tearing, whole roll had to scrap, and causes rare precious metals such as waste a large amount of Ni, Cr, Mn.The roll that contains cemented carbide rings after the improvement, the roll that is disclosed as the CN9210435.x patent, it is by centrifugal casting, one or more carbide rings are cast in the cast iron body of roll, to increase the wearability and the intensity of the body of roll, in case but the carbide ring wearing and tearing are bad, still have to whole roll changed.And the replacing of whole roll very bothers, and can cause increasing of rolling waste product.

The purpose of this utility model provides a kind of when the roller shell surface abrasion, need not integral replacing, and long service life is to save rare precious metal, the roll device of effectively increasing work efficiency.

The utility model comprises roller core (1), the body of roll and is installed in rolling bearing on the roll neck, its principal character is that an end of roller core (1) is provided with convex shoulder (20), there is a roller shell (2) that cooperates with its microgap the roller core outside, the rolling bearing outside of roll neck is set with hydraulic nut kink (11) and hydraulic nut (12) successively, have oil input channel (21) in the hydraulic nut (12), between hydraulic nut (12) and the hydraulic nut kink (11) oil pocket (22) is arranged, the hydraulic nut kink has cannelure on (11), and slotting ring (13) is housed in the groove.

The further feature of the utility model is that roller shell (2) is the casting of bimetallic composite centrifugal, and its internal layer is plain cast iron or normal steel casting, and skin is alloy cast iron or alloy cast steel.

Rolling bearing holds (8) by the short garden of four row axis of a cylinder and two half outer garden thrust bearing (9) combines, and inner end cap (6) is the labyrinth type bearing cover, is provided with between roller shell (2) and the inner end cap (6) to compress lasso (3) and thrust circle (5).

Roller core (1) is provided with anti-feather key (4).

Because roller core of the present utility model outside is provided with a roller shell that cooperates with its microgap, the rolling bearing outside of roll neck is provided with by hydraulic nut, the prestressing force hydraulic locking mechanism that hydraulic nut kink etc. are formed, roller shell can be securely fixed on the roller core, in case roller shell surface abrasion, only need unclamp hydraulic locking mechanism, can change roller shell easily, needn't change whole roll, thereby can save noble metals such as Ni, Cr, Mn in a large number, improve the operating efficiency of milling train effectively, again because roller shell is the bimetallic composite construction, wearability and good rigidly, long service life.

Accompanying drawing 1 is the utility model structural representation.

1-roller core among the figure, 2-roller shell, 3-compress lasso, 4-anti-feather key, 5-thrust circle, 6-inner end cap, 7-housing bearing seat, the short garden of 8-four row axis of a cylinder holds, 9-two half cylindrical thrust bearings, 10-bearing block outer end cap, the female kink of 11-hydraulic pressure sieve, 12-hydraulic nut, 13-slotting ring, 14-seal cover board, 15-fine-tuning nut, 16-sealing gasket, 17,18,19-O RunddichtringO, 20-convex shoulder, 21-oil input channel, 22-oil pocket.

Further describe structure of the present utility model and operation principle below in conjunction with drawings and Examples.

Referring to accompanying drawing, the left end of roller core (1) is provided with convex shoulder (20), and this end is a power intake, and the roller shell (2) that the outside suit of roller core (1) cooperates with its microgap is changed so roller shell (2) is detachable, and is reusable.Roller shell (2) is by bimetal centrifugal casting, and its superficial layer is alloy cast iron (or alloy cast steel), and internal layer is plain cast iron (or normal steel casting).The right roll neck portion of roller core (1) is suit successively:

A, compress lasso (3), in order to transmitting hydraulic power, roller shell (2) is carried out axial location and end face compresses;

B, thrust circle (5), the section axial power that produces when bearing work;

C, labyrinth type bearing (ball) cover, i.e. inner end cap (6) is in order to dustproof, antifouling;

D, four row cylindrical bearings (8), two half outer garden thrust bearing (9) and outer end cap (10);

E, hydraulic nut kink (11) be with the transmission fluid living thrust of cutting down output, and the inner ring of this axial thrust by rolling bearing acted on compress lasso (3).

F, hydraulic nut (12), it is connected for the zigzag rib-loop with roller core (1), and with the axial thrust that hydraulic pressure produces, by the zigzag rib-loop, acting in opposition makes roller core (1) strain on roller core (1), produces prestressing force.

G, fine setting mother sieve (15), in order to levelling roll axial distance,

Keep the rational end play of whole roll, then by little oil mass high-pressure oil pump, hydraulic oil is pressed in oil input channel (21) and the oil pocket (22), oil pressure raises gradually, hydraulic nut kink (11) is pushed and moves to right, inner ring by two half cylindrical thrust bearings (9) and four row cylindrical bearings (8), axial thrust reached compress lasso (3), nationality hydraulic oil pressure, make its end face compress the end face of roller shell (2), roller shell (2) and roller core can not be relatively moved, to bear the roll-force that produces in the Rolling Production process.Simultaneously, hydraulic nut (12) receives this oil pressure too and moves right, but because it is connected for saw-tooth thread with roller core (1), hydraulic nut (12) is subjected to very big axial thrust and passes to roller core (1), make roller core (1) elastic elongation deformation, when treating that pressure reaches predetermined force value, measure hydraulic nut kink (11) and hydraulic nut (12) and locate the width of cannelure, in Hough formula slotting ring (13) insertion groove that one thickness is consistent with it, shed pressure fuel pump, roller core just produces axial shrinkage, and slotting ring (13) is firmly blocked, the axial clamping force that has kept all each positions is stabilized on the roller core (1) roller shell (2).At last, rotate fine-tuning nut (15), compress end play between lasso (3) and the thrust circle (5) with adjustment.

Claims

1, a kind of by roller core (1), roller shell overlaps roll device with the interchangeable edge that the rolling bearing that is installed on the roll neck is formed, and it is characterized by:

One end of A, roller core (1) is provided with convex shoulder (20), and there is a roller shell (2) that cooperates with its microgap the roller core outside;

The rolling bearing outside of B, roll neck is set with hydraulic nut kink (11) and hydraulic nut (12) successively, have oil input channel (21) in the hydraulic nut (12), between hydraulic nut (12) and hydraulic nut kink (11) oil pocket (22) is arranged, the hydraulic nut kink has cannelure on (11), and slotting ring (13) is housed in the groove.

2, by the described a kind of interchangeable edge cover roll device of claim 1, it is characterized in that roller shell (2) is the casting of bimetallic composite centrifugal, its internal layer is plain cast iron or normal steel casting, and skin is alloy cast iron or alloy chromium steel.

3, by the described a kind of interchangeable edge cover roll device of claim 1, it is characterized by said rolling bearing is made up of four row cylindrical bearings (8) and two half cylindrical thrust bearing (9) and forms, inner end cap (6) is the labyrinth type bearing cover, is provided with between roller shell (2) and the inner end cap (6) to compress lasso (3) and thrust circle (5).

4, by claim 1,2 described a kind of interchangeable edge cover roll devices, it is characterized by roller core (1) and be provided with anti-feather key (4).