CN201320556Y

CN201320556Y - Long guide roller structure of rolling mill

Info

Publication number: CN201320556Y
Application number: CNU2008201444368U
Authority: CN
Inventors: 王海东; 李恩学; 王久营; 田德泉; 焦艳
Original assignee: Tianjin Pipe Group Corp
Current assignee: Tianjin Pipe Group Corp
Priority date: 2008-12-12
Filing date: 2008-12-12
Publication date: 2009-10-07
Anticipated expiration: 2018-12-12

Abstract

The utility model provides a long guide roller structure of a rolling mill, which comprises long guide rollers connected via universal shafts and installed on a base via a front bearing housing and a rear bearing housing. An inner hole is formed at one end of each long guide roller; a sliding bearing is installed in the inner hole and sleeved on a support shaft on the front bearing housing; a flange is arranged at the other end of each long guide roller and is sleeved on a flat head of a transmission shaft installed inside the rear bearing housing; and the long guide rollers can freely slide right and left along the axial direction. The long guide roller structure effectively avoids the impact due to the change of the center lines of the long guide rollers, and overcomes the change arising from the abrasion of the long guide rollers and a support roller. The structure has simple installation and convenient adjustment, inspection and maintenance; and only the freely sliding end of each long guide roller is inserted into the support shaft with clearance, so as to reduce the consumption of manpower and material resources, lower the maintenance cost and eliminate the impact of thermal expansion on equipment. The long guide rollers installed on the support roller can achieve smoother operation of hollow billets and more stable surface quality of steel pipes.

Description

The long deflector roll structure of milling train

Technical field

The utility model relates to a kind of long deflector roll structure of milling train.

Background technology

Used since the production of ASSEL milling train, the fault of director's deflector roll takes place frequently behind the milling train, and fault time is high always, should locate fault time near 25 hours in every month, is seriously perplexing ordinary production, and the spare part of input is too many, should locate 100,000 yuan of spare part expense average near in every month.Be easy to cause the instability of product quality simultaneously, the amount of reconditioning every month steel pipe is also bigger.

The appearance of the problems referred to above is that mainly the front-end bearing pedestal 1 of milling train and connecting axle 2 employings are rigidly connected, and rear bearing block 6 inner bearings of the front-end bearing pedestal 1 of connecting axle and power transmission shaft 5 damage frequent; The ring flange of connecting axle splits the bolt looseness of fixed flange, fracture simultaneously.Owing to be subjected to the position influence of backing roll, long deflector roll 3 gallopings, shake seriously cause the damage of its supported underneath roller also relatively more frequent in the operation of rolling.The universal drive shaft 4 that connects between the long deflector roll damages thereupon repeatedly, causes the steel tube surface of production quality problems such as gouge to occur.Because the fault that produces, the time that needs repairing is long, and the spare part expense of Tou Ruing is also very high therebetween.

Summary of the invention

At structural deficiency in the prior art, the purpose of this utility model provides a kind of long deflector roll structure of milling train, be beneficial to reach reduce the spare part expense, and the breakdown maintenance time of reducing equipment, improve the lumber recovery of product, guarantee the quality of steel pipe's production.

For achieving the above object, the technical solution adopted in the utility model provides a kind of long deflector roll structure of milling train, this structure includes long deflector roll, connect by universal drive shaft between the long deflector roll, long deflector roll is installed on the base by front-end bearing pedestal and rear bearing block, wherein: an end of described long deflector roll is provided with endoporus, in this hole sliding bearing is housed, and is sleeved on the back shaft on the described front-end bearing pedestal; The other end of long deflector roll is provided with ring flange, and this ring flange is sleeved on the homalocephalus that is installed in the power transmission shaft in the described rear bearing block, and long deflector roll left and right directions vertically is free to slide.

Be provided with slotted hole in the described ring flange, with the homalocephalus fit clearance amount of power transmission shaft be 0.5mm.

Entire length after described long deflector roll is installed and the gap value between the antero posterior axis bearing are respectively 25mm.

Effect of the present utility model is:

1. owing to adopt and to flexibly connect, avoided effectively, overcome the variation that the wearing and tearing of long deflector roll and backing roll bring because of center line changes the influence that causes.

2. because length and weight double manyly, be subjected to the influence of backing roll position less.Original two row's backing rolls support group leader's deflector roll, are that four row's backing rolls support long deflector roll now, and long deflector roll does not have the phenomenon of perk in the operation process, even a backing roll damages the normal operation also not influence of back to equipment.

3. install simply, easy to adjust, check easy to maintenance.As long as it is just passable that free skating moved end that will long deflector roll is inserted in the back shaft, reduced human and material resources, reduce maintenance cost.

4. owing to the universal drive shaft cancellation that connects between preceding two group leader's deflector rolls, do not have transitional link, hollow billet turns round more steady on long deflector roll, and the body surface quality is more stable.

5. adopt at the milling train port of export and be free to slide form, between bearing block and long deflector roll, leave the gap value of 25mm, eliminate the influence of thermal expansion equipment.

6. obviously reduce the fault time of equipment, only reduced significantly for 2-3 hour, spare part expense in every month, every month about 10,000 yuan.

Description of drawings

Fig. 1 is the long deflector roll mounting structure schematic diagram of prior art;

Fig. 2 is a long deflector roll mounting structure schematic diagram of the present utility model;

Fig. 3 is a long deflector roll of the present utility model installation site schematic diagram.

Fig. 4 is a long deflector roll ring flange endoporus schematic diagram of the present utility model

Among the figure:

1, front-end bearing pedestal 2, connecting axle 3, long deflector roll 4, universal drive shaft

5, power transmission shaft 6, rear bearing block 7, backing roll 8, hollow billet

9, base 10, bolster 11, power transmission shaft 12, sliding bearing

The specific embodiment

Reaching embodiment in conjunction with the accompanying drawings is illustrated the long deflector roll structure of milling train of the present utility model.

Shown in Fig. 2,3,4, the long deflector roll structure of milling train of the present utility model is: this structure includes long deflector roll, connect by universal drive shaft between the long deflector roll, long deflector roll is installed on the base by front-end bearing pedestal and rear bearing block, one end of described long deflector roll 3 is provided with endoporus, sliding bearing 12 is housed in this hole, and is sleeved on the back shaft 10 on the described front-end bearing pedestal 1; The other end of long deflector roll 3 is provided with ring flange, and this ring flange is sleeved on the homalocephalus that is installed in the power transmission shaft 11 in the described rear bearing block 6, and long deflector roll 3 left and right directions vertically is free to slide.

Be provided with slotted hole in the described ring flange, with the homalocephalus fit clearance amount of power transmission shaft 11 be 0.5mm.Entire length after described long deflector roll 3 is installed and the gap value between the antero posterior axis bearing are respectively 25mm.

The long deflector roll structure of milling train of the present utility model is achieved in that the left end endoporus of described long deflector roll 3 adorns a sliding bearing 12, and is enclosed within on the back shaft 10 that is fixed on the front-end bearing pedestal 1, and sliding bearing 12 is 0.5mm with the fit clearance amount of back shaft 10; The right-hand member ring flange of long deflector roll 3 as shown in Figure 4, is enclosed within on the homalocephalus that is installed in the power transmission shaft 11 in the rear bearing block 6, and the fit clearance amount of slotted hole and homalocephalus is 0.5mm in the long 100mm of homalocephalus, ring flange.The two ends of long deflector roll 3 all bolt of no use etc. are fixing, and when center line changed, the center of long deflector roll 3 is variation thereupon also.The size after long deflector roll 3 is installed and the gap value of antero posterior axis bearing are 25mm, influence when long deflector roll 3 expanded by heating, the length 20mm that can extend, but because the two ends of long deflector roll 3 all are enclosed within on the homalocephalus of back shaft 10 and power transmission shaft 11, can be free to slide along long deflector roll 3 axial left and right directions.

Preceding two group length originally used are designed to the long deflector roll of a group length as 8275mm as the long deflector roll 3 of 4050mm, simultaneously original connecting axle are designed to present back shaft 10.

When ASSEL mill milling steel pipe, the power transmission shaft 11 of rear bearing block 6 is rotation at a high speed under the drive of motor, reductor, and the homalocephalus by power transmission shaft 11 drives two groups of long deflector rolls 3 rotations at a high speed that are installed on the backing roll 7, connect by universal drive shaft 4 between the long deflector roll 3, guarantee the even running on long deflector roll 3 of hot steel wool pipe 8, and can guarantee effectively that steel pipe body surface quality does not go out quality problems such as scuffing.

Claims

1, a kind of long deflector roll structure of milling train, this structure includes long deflector roll, connects by universal drive shaft between the long deflector roll, and long deflector roll is installed on the base by front-end bearing pedestal and rear bearing block, it is characterized in that:

One end of described long deflector roll (3) is provided with endoporus, and sliding bearing (12) is housed in this hole, and is sleeved on the back shaft (10) on the described front-end bearing pedestal (1); The other end of long deflector roll (3) is provided with ring flange, and this ring flange is sleeved on the homalocephalus that is installed in the power transmission shaft (11) in the described rear bearing block (6), and long deflector roll (3) left and right directions vertically is free to slide.

2, the long deflector roll structure of milling train according to claim 1 is characterized in that: be provided with slotted hole in the described ring flange, with the homalocephalus fit clearance amount of power transmission shaft (11) be 0.5mm.

3, the long deflector roll structure of milling train according to claim 1 is characterized in that: entire length after described long deflector roll (3) is installed and the gap value between the antero posterior axis bearing are respectively 25mm.