CN202725681U

CN202725681U - High-tightness backup roll

Info

Publication number: CN202725681U
Application number: CN 201220364986
Authority: CN
Inventors: 万玲; 李文喜
Original assignee: XIANGYANG ZHENBEN TRANSMISSION EQUIPMENT CO Ltd
Current assignee: XIANGYANG ZHENBEN TRANSMISSION EQUIPMENT CO Ltd
Priority date: 2012-07-26
Filing date: 2012-07-26
Publication date: 2013-02-13
Anticipated expiration: 2022-07-26

Abstract

The utility model relates to a high-tightness backup roll, which is mainly used on a precise tension leveler in a metallurgical industry. Two ends of a shaft are fixed on a support seat, the middle part of the shaft is provided with a needle bearing, deep groove ball bearings with rubber seals are arranged on the two ends of the shaft, the end parts of the two deep groove ball bearings on the shaft are respectively provided with a shaft ring, the corresponding parts of the deep groove ball bearings and the shaft rings are respectively provided with an O-shaped ring 2, and the deep groove ball bearings and the O-shaped sealing rings 2 define first-stage sealing; a sealing seat is arranged between each shaft ring and an outer sleeve, a skeleton sealing ring is arranged in each sealing seat and shaft ring in an interference mode, an O-shaped sealing ring 1 is arranged between each sealing seat and outer sleeve, and the skeleton sealing rings, the O-shaped sealing rings 1, the sealing seats and the O-shaped sealing rings 2 define second-stage sealing; the sealing seats and the shaft rings are combined to form mechanical labyrinth sealing; and the sealing seats and the shaft rings are respectively axially positioned by elastic baffle rings used for shafts and elastic baffle rings used for holes. The high-tightness backup roll has a good sealing performance, the service life of the backup roll is greatly prolonged, the surface quality of a plate strip and the production efficiency are improved, and the production cost is reduced.

Description

The backing roll of high leakproofness

Technical field

The utility model relates to the metallurgy industry technical field, specifically the accurate withdrawal straightening machine high leakproofness backing roll on a kind of strip finishing line.

Background technology

Metallurgical Industry is more and more higher to speed, operating efficiency and the plate surface quality requirement of panel production line withdrawal straightening machine.Although precision, the bearing capacity of backing roll have a very significant increase at present, still there is more problem in the reliability of accurate withdrawal straightening machine sealing.Usually because the backing roll sealing property is bad, cause inner lubricating grease to be revealed and pollute strip, and owing to backing roll internal bearings insufficient lubrication, introduced contaminants enters backing roll inside, thereby reduce strip surface quality, backing roll life-span and production efficiency, production cost is improved.

Summary of the invention

For overcoming the deficiencies in the prior art, goal of the invention of the present utility model is to provide a kind of backing roll of high leakproofness, realize to improve the purpose of backing roll sealing reliability when the high speed straightening.

For achieving the above object, axle of the present utility model two ends are fixed on the supporting seat, needle bearing is equipped with at the middle part of axle, be contained in the two ends of axle with the deep groove ball bearing of rubber seal, the inner ring of deep groove ball bearing is located by the shaft shoulder, locate by the back-up ring between needle bearing and the deep groove ball bearing outer ring of deep groove ball bearing, it is characterized in that: on axle, blowout patche is equipped with respectively in the end of two deep groove ball bearings, on axle, the corresponding position of deep groove ball bearing and blowout patche is equipped with respectively O RunddichtringO two, and deep groove ball bearing and O RunddichtringO two form the first order sealing that can prevent that backing roll internal lubrication fat from leaking outside; Be provided with seal receptacle between blowout patche and the overcoat, the backbone sealing ring interference is packed in seal receptacle and the blowout patche, and O RunddichtringO one is contained between seal receptacle and the overcoat, backbone sealing ring, O RunddichtringO one, seal receptacle, forms second level sealing with O RunddichtringO two; Seal receptacle and blowout patche are in conjunction with forming mechanical labyrinth sealing; Second level sealing is combined with mechanical labyrinth sealing to form and is not only prevented that inner lubricating grease from leaking outside, but also preventing that water, the impurity in the external world from entering the hermetically-sealed construction of backing roll inside; Seal receptacle, blowout patche carry out axial location with circlip for shaft, circlip for hole respectively.

Backing roll of the present utility model in the course of the work, by rotation and stirring, the inner lubricating grease that adds can be slowly dilution, when lubricating grease during to external leakage, the O RunddichtringO one at the deep groove ball bearing of double-sided belt rubber seal and deep groove ball bearing endoporus place can play the ground floor sealing function, and its enforcement is stopped; If there is lubricating grease to pass through the ground floor sealing, the second level hermetically-sealed construction that forms by backbone sealing ring, O RunddichtringO one, seal receptacle, with O RunddichtringO two further stops its enforcement; The mechanical labyrinth seal of simultaneously blowout patche and seal receptacle formation can prevent inner lubricating grease to external leakage, prevents again that outside impurity, water etc. from entering backing roll inside simultaneously, and backing roll inside is caused damage, and reduces the service life of backing roll.

The utility model compared with prior art has the following advantages:

(1) good seal performance: adopt the hermetically-sealed construction of multiple formula, greatly improved the sealing reliability of backing roll when the high speed straightening;

(2) high life: because good seal performance, the lubricating grease that can prevent backing roll inside is revealed, so that backing roll inside is fully lubricated, can prevent effectively simultaneously that extraneous water, impurity etc. from entering backing roll inside, thereby greatly improve backing roll service life, strip surface quality and production efficiency, reduce production costs.

Description of drawings

Fig. 1 is structure diagram of the present utility model.

The specific embodiment

As shown in Figure 1, axle 13 two ends are fixed on the supporting seat, needle bearing 9 is equipped with at the middle part of axle 13, be contained in the two ends of axle 13 with the deep groove ball bearing 10 of rubber seal, the inner ring of deep groove ball bearing 10 is located by the shaft shoulder, the outer ring of deep groove ball bearing 10 is by back-up ring 7 location between needle bearing 9 and the deep groove ball bearing 10, on axle 13, blowout patche 5 is equipped with respectively in the end of two deep groove ball bearings 10, on axle 13, deep groove ball bearing 10 is equipped with respectively O RunddichtringO 2 11 with the corresponding position of blowout patche 5, deep groove ball bearing 10 and O RunddichtringO 2 11 form first order sealing, can prevent that backing roll internal lubrication fat from leaking outside; Be provided with seal receptacle 4 between blowout patche 5 and the overcoat 8, backbone sealing ring 2 interference are packed in seal receptacle 4 and the blowout patche 5, O RunddichtringO 1 is contained between seal receptacle 4 and the overcoat 8, backbone sealing ring 2, O RunddichtringO 1, seal receptacle 4, forms second level sealing with O RunddichtringO 2 11; Seal receptacle 4 and blowout patche 5 are in conjunction with forming mechanical labyrinth sealing; Second level sealing is combined with mechanical labyrinth sealing to form and is not only prevented that inner lubricating grease from leaking outside, but also preventing that water, the impurity in the external world from entering the hermetically-sealed construction of backing roll inside; Seal receptacle 4, blowout patche 5 carry out axial location with circlip for shaft 1, circlip for hole 12 respectively.

Overcoat 8 of the present utility model passive rotation under the effect of extraneous frictional force, drive simultaneously deep groove ball bearing 10 rotations of inner needle bearing 9, double-sided belt rubber seal, this moment, the outer ring of deep groove ball bearing 10 rotated with overcoat 8, the inner ring of deep groove ball bearing 10 and axle 13 are linked together by O RunddichtringO 2 11, do not rotate, at this moment deep groove ball bearing 10 and O RunddichtringO 11 have formed the ground floor sealing, prevent that inner lubricating grease from leaking outside, and causes the pollution to accurate strip; Backbone sealing ring 2 interference are packed in the seal receptacle 4, seal receptacle 4 rotates with overcoat 8 under the effect of O RunddichtringO 1 again simultaneously, blowout patche 5 rotates simultaneously with axle 13 under the effect of O RunddichtringO 2 11, and O RunddichtringO 3, backbone sealing ring 2, seal receptacle 4, O RunddichtringO 2 11 combine and formed second layer sealing; Seal receptacle 4 and blowout patche 5 are combined together to form a kind of mechanical labyrinth seal structure simultaneously, both prevented that inner lubricating grease from leaking outside, prevent that again extraneous water, impurity from entering backing roll inside, thereby improve the service life of backing roll, this has namely formed the multiple formula hermetically-sealed construction form of backing roll with regard to sample.

Claims

1. the backing roll of a high leakproofness, axle (13) two ends are fixed on the supporting seat, needle bearing (9) is equipped with at the middle part of axle (13), deep groove ball bearing (10) is contained in the two ends of axle (13), the inner ring of deep groove ball bearing (10) is located by the shaft shoulder, the outer ring of deep groove ball bearing (10) is by the location of the back-up ring (7) between needle bearing (9) and the deep groove ball bearing (10), it is characterized in that: on axle (13), blowout patche (5) is equipped with respectively in the end of two deep groove ball bearings (10), on axle (13), deep groove ball bearing (10) is equipped with respectively O RunddichtringO two (11) with the corresponding position of blowout patche (5), and deep groove ball bearing (10) and O RunddichtringO two (11) form the first order sealing that can prevent that backing roll internal lubrication fat from leaking outside; Be provided with seal receptacle (4) between blowout patche (5) and the overcoat (8), backbone sealing ring (2) interference is packed in seal receptacle (4) and the blowout patche (5), O RunddichtringO one (3) is contained between seal receptacle (4) and the overcoat (8), backbone sealing ring (2), O RunddichtringO one (3), seal receptacle (4), forms second level sealing with O RunddichtringO two (11); Seal receptacle (4) and blowout patche (5) are in conjunction with forming mechanical labyrinth sealing; Second level sealing is combined with mechanical labyrinth sealing to form and is not only prevented that inner lubricating grease from leaking outside, but also preventing that water, the impurity in the external world from entering the hermetically-sealed construction of backing roll inside; Seal receptacle (4), blowout patche (5) use respectively circlip for shaft (1), circlip for hole (12) to carry out axial location.

2. the backing roll of high leakproofness according to claim 1 is characterized in that: deep groove ball bearing (10) is the structure with rubber seal.