CN203221065U

CN203221065U - Rolling mill idler roller bearing seat

Info

Publication number: CN203221065U
Application number: CN 201320160701
Authority: CN
Inventors: 叶乃威; 袁海永; 顾宁吉
Original assignee: Ningbo Baoxin Stainless Steel Co Ltd
Current assignee: Ningbo Baoxin Stainless Steel Co Ltd
Priority date: 2013-04-02
Filing date: 2013-04-02
Publication date: 2013-10-02
Anticipated expiration: 2023-04-02

Abstract

A rolling mill idler roller bearing seat comprises a bearing box and a bearing seat end cover, wherein a tapered roller bearing outer ring, a bearing inner ring and a copper ring are arranged in the bearing box. The rolling mill idler roller bearing seat is characterized in that a thrust bearing is arranged between the bearing inner ring and the bearing seat end cover, springs are supported between the bearing seat end cover and the thrust bearing, the outer diameter of the copper ring is consistent with the outer diameter of the end part of an idler roller, the copper ring is arranged in the inner ring of a retainer of the thrust bearing, and the end surface of the copper ring is respectively in contact with the bearing inner ring and the end part of the idler roller. The rolling mill idler roller bearing seat disclosed by the utility model is simple in structure and reasonable in design, deflection of the bearing box is effectively solved, quality defects such as roll marks are effectively overcome, wear and tear of parts are eliminated, the service life of the bearing seat is improved, and the stability of the product quality is ensured.

Description

A kind of milling train idler roller bearing block

Technical field

The utility model relates to a kind of bearing block, and especially a kind of milling train idler roller bearing block is applied to the last idler roller transmission side bearing block of Sendzimir corrosion resistant plate hoop mill.

Background technology

The last idler roller bearing block of Sendzimir corrosion resistant plate hoop mill adopts taper roll bearing also to be suspended on the idler roller two ends, last idler roller the milling train backing roll, about between two intermediate calender rolls and the intermediate calender rolls.The idler roller two ends are assemblied in respectively in the bearing block, and bearing block adopts hydraulic cylinder to hang.Hydraulic cylinder has the hydraulic oil effect all the time in the operation of rolling.Traditional bearing block comprises bearing box 1 and bearing cover 2 as shown in Figure 2, is provided with taper roll bearing outer ring 3 and bearing inner race 4 in the bearing box 1, is provided with copper ring 8 between bearing inner race 4 and the bearing cover 2.

The subject matter that this bearing block exists: being in the operation of rolling causes bearing inner race, rolling element and bearing outer ring to separate easily because suspension hydraulic cylinder and roller are the effect of pressure, because existing the gap to make bearing box deflection between the copper ring in the bearing block and the bearing cover, the result produces following defective:

1) inner surface of bearing cover is contacted with the copper ring anchor ring produce friction and wear and tear, fricative copper scale is easy to enter and just causes strip surface quality defective such as roll marks in rolling belt steel surface or roller system;

2) make the outer face of bearing box and the stop of suspension (surface overlaying aluminium bronze) friction, make stop wearing and tearing, fricative copper scale also be easy to enter just in rolling belt steel surface or roller system, to cause mass defects such as roll marks;

3) make the suspension roll neck of bearing box and suspension holdfast (aluminium bronze manufacturing) produce inhomogeneous friction and make its wearing and tearing, fricative copper scale also is easy to enter and just causes mass defect such as roll marks in rolling belt steel surface or roller system;

4) since the inner surface of bearing cover contact with the copper ring anchor ring and produces friction and idler roller end axle journal adopts matched in clearance with the bearing inner race assembling, when this anchor ring frictional force causes bearing inner race and the generation of idler roller roll neck to be skidded easily during greater than bearing inner race and idler roller roll neck frictional force and then finally generation fire hidden danger occurs rubbing, weares and teares.Cause copper ring and idler roller roll neck end face friction and generation copper scale to occur simultaneously.

5) because bearing box deflection makes bearing outer ring and rolling element, rolling element and inner ring lose efficacy because unbalance stress produces to peel off.

Above design defect is influence of rolled quality and fire hidden danger is arranged not only, thereby also directly causes copper ring, stop, suspension holdfast short hairs in service life are prepared a large amount of spare parts increases entreprise costs, have increased the plant maintenance workload simultaneously.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of milling train idler roller bearing block simple in structure, reasonable in design at the above-mentioned state of the art, effectively solves deflection problem, the elimination parts depreciation of bearing box, improves service life.

The utility model solves the problems of the technologies described above the technical scheme that adopts: a kind of milling train idler roller bearing block, comprise bearing box and bearing cover, be provided with taper roll bearing outer ring, bearing inner race and copper ring in the described bearing box, it is characterized in that: be provided with a thrust bearing between described bearing inner race and the bearing cover, and between described bearing cover and thrust bearing, be supported with spring.

As improvement, the external diameter of described copper ring is consistent with the outer end diameter of idler roller, and described copper ring is arranged in the retainer of thrust bearing, and its end face contacts with the end of bearing inner race and idler roller respectively.

Improve, described spring be several again, forms the groove that several can supply described spring to insert on described bearing cover and the anchor ring that described thrust bearing contacts, and described spring is separately positioned in the corresponding groove and contacts with the outer face of described thrust bearing.

At last, described thrust bearing can adopt ball or roller bearing to replace.

Compared with prior art, advantage of the present utility model is: by be provided with a thrust bearing (ball or roller bearing) between bearing inner race and bearing cover, eliminate the gap between original copper ring and the end cap, made bearing box in use the deflection phenomenon can not occur.Therefore, thoroughly eliminated above-mentioned various fretting wear problem; Because the structure of bearing box is constant, therefore need not to change mounting condition and size simultaneously.The milling train idler roller bearing block that the utility model is simple in structure, reasonable in design, effectively mass defects, elimination parts depreciations such as the deflection problem of solution bearing box, roll marks, improved the service life of bearing block, guaranteed the stable of product quality, can be generalized on all Sendzimir strip-mill strips or have the milling train of similar structures to use.

Description of drawings

Fig. 1 is the structural representation of bearing block of the present utility model;

Fig. 2 is the structural representation of the bearing block before improving.

The specific embodiment

Describe in further detail below in conjunction with the utility model of accompanying drawing embodiment.

Comparative Examples

Bearing block before improving, as shown in Figure 2, comprise bearing box 1 and bearing cover 2, be provided with taper roll bearing outer ring 3 and bearing inner race 4 in the bearing box 1, be provided with copper ring 8 between bearing inner race 4 and the bearing cover 2, the inner surface of this spline structure bottom bracket end cap 2 is directly to contact with copper ring 8 anchor rings, easily cause wearing and tearing owing to rub, the copper scale that produces can produce mass defects such as roll marks, because the gap between copper ring 8 and the bearing cover 2, make bearing box 1 in use the deflection phenomenon can occur, have a strong impact on the stable of product quality.

Embodiment 1

A kind of milling train idler roller bearing block, comprise bearing box 1 and bearing cover 2, bearing cover 2 is involutory to be arranged on the open end of bearing box 1, be connected and fixed by bolt 9, be provided with taper roll bearing outer ring 3 in the involutory cavity of bearing box 1 and bearing cover 2, bearing inner race 4, copper ring 8 and thrust bearing 6, the external diameter of copper ring 8 is consistent with the outer end diameter of idler roller 5, copper ring 8 is arranged in the retainer inner ring of thrust bearing 6, its end face contacts with the end of bearing inner race 4 and idler roller 5 respectively, make copper ring 8 no longer directly contact with bearing cover 2 like this, avoided the wearing and tearing that produce owing to friction; Thrust bearing 6 is arranged between bearing inner race 4 and the bearing cover 2, and between bearing cover 2 and thrust bearing 6, be supported with several springs 7, but form the groove that several ammunition feed springs 7 are inserted on bearing cover 2 and the anchor ring that thrust bearing 6 contacts, spring 7 is separately positioned in the corresponding groove and contacts with the outer face of thrust bearing 6, because the effect of spring 7, eliminated the gap between bearing inner race 4 and the thrust bearing 6, make bearing box 1 in use the deflection phenomenon can not occur, fundamentally eliminated the above-mentioned root that fretting wear occurs.

Thrust bearing 6 among the embodiment can adopt ball or roller bearing to replace.

Add man-hour, only need original bearing cover 2 is redesigned, design thrust bearing 6 and spring 7 again, and bearing box 1 and original taper roll bearing model and specification remain unchanged, copper ring 8 is improved, and thickness and original copper ring 8 consistency of thickness, external diameter change little consistent with idler roller 5 outer end diameter, make its axial force of bearing idler roller 5, no longer contact with bearing cover 2.Because structure and the size of bearing box 1 are all constant, therefore do not change former mounting condition.The appearance and size of solid housing does not change substantially, so roller is and inner other accessory sizes of milling train do not change yet.

The utility model effect after implementing is fairly obvious, has solved the deflection problem of bearing box fully, has thoroughly solved above-mentioned parts depreciation problem, has improved service life, has eliminated the hidden danger of quality of copper scale generation roll marks fully.

Claims

1. milling train idler roller bearing block, comprise bearing box and bearing cover, be provided with taper roll bearing outer ring, bearing inner race and copper ring in the described bearing box, it is characterized in that: be provided with a thrust bearing between described bearing inner race and the bearing cover, and between described bearing cover and thrust bearing, be supported with spring.

2. milling train idler roller bearing block according to claim 1, it is characterized in that: the external diameter of described copper ring is consistent with the outer end diameter of idler roller, and described copper ring is arranged in the retainer of thrust bearing, and its end face contacts with the end of bearing inner race and idler roller respectively.

3. milling train idler roller bearing block according to claim 1 and 2, it is characterized in that: described spring is several, form the groove that several can be inserted for described spring on described bearing cover and the anchor ring that described thrust bearing contacts, described spring is separately positioned in the corresponding groove and contacts with the outer face of described thrust bearing.

4. milling train idler roller bearing block according to claim 1 and 2 is characterized in that: described thrust bearing can adopt ball or roller bearing to replace.