SU850283A1

SU850283A1 - Roller for directing and supporting ingot

Info

Publication number: SU850283A1
Application number: SU792848186A
Authority: SU
Inventors: Семен Аронович Крулевецкий; Иван Федорович Иванченко; Александр Васильевич Матюхин; Александр Иванович Уманец; Сергей Константинович Андросов; Виктор Григорьевич Кудачков; Александр Павлович Войтенко
Original assignee: Днепропетровский Ордена Трудовогокрасного Знамени Металлургический Ин-Ститут
Priority date: 1979-12-07
Filing date: 1979-12-07
Publication date: 1981-07-30

Description

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Изобретение относитс к металлургии и может быть использовано на машинах непрерывного лить заготовок (МНЛЗ).The invention relates to metallurgy and can be used on continuous casting machines (continuous casting machines).

Известен ролик дл направлени и поддержани слитка на машине непрерывного лить , содержащий вал с цапфами и установленную на валу тонкостенную бочку. Охлаждаема полость между бочкой и валом образована кольцевыми и винтовыми канавками , вьтолненными на поверхности вала. Охладитель подводитс в охлаждаемую полость через осевой канал в цапфе и радиальные отверсти и отводитс через радиальные отверсти и рсевой канал в другой цап«.A roller is known for guiding and maintaining the ingot on a continuous casting machine, comprising a shaft with trunnions and a thin-walled barrel mounted on the shaft. The cooled cavity between the barrel and the shaft is formed by annular and helical grooves, filled to the surface of the shaft. The cooler is supplied to the cooled cavity through the axial channel in the trunnion and the radial holes and is discharged through the radial holes and the rotary channel to the other pin.

феСЗНедостаток известного ролика состоит в том, что вследствие тонкостенности бочки температура ее по- йерхности в зоие контакта со слит- ком значительно выше, чем по остальной части поверхности. Перепад темпёратур приводит к возникновению термических напр жений, что снижает срок службы ролика.PHASE The disadvantage of the known roller is that, due to the thinness of the barrel, the temperature of its surface at the point of contact with the ingot is much higher than the rest of the surface. The temperature difference leads to thermal stresses, which reduces the life of the roller.

Цель изобретени - повьш1ёние срока службы роликов в зоне вторично- го охлаждени .The purpose of the invention is to increase the service life of the rollers in the secondary cooling zone.

Указанна цель достигаетс тем, что ролик, содержащий бочку и вал с осевым отверстием и радиальными . This goal is achieved by having a roller comprising a barrel and a shaft with an axial orifice and radial.

10 каналами, а также с кольцевьми и продольными тсанавкаМи на его поверхности , снабжен по торцам коллекторами и уплотн ющими сегментами,.расположенными вдоль кольцевого зазора, 10 channels, as well as rings and longitudinal mounts on its surface, are provided with end plates with collectors and sealing segments located along the annular gap,

iS выполненного между бочкой и валом, причем длина коллектора составл ет 4/5-3/4, а длина сегмента 1/5-1/4 длины зазора.iS is made between the barrel and the shaft, the collector length being 4 / 5-3 / 4, and the segment length is 1 / 5-1 / 4 gap length.

Claims

Such a design of the roller allows 20 em to increase the speed of movement of the cooler in the zone of contact of the roller with the ingot and to provide an effective heat dissipation. FIG. Figure 1 shows a roller for guiding and maintaining the ingot. front view; in fig. same side view. The support roller of a continuous casting machine consists of a steel barrel 1 with a number of circumferential grooves 2 located along the length and a steel shaft 3 with trunnions A. In one of the trunnions, an axial bore 5 is connected through the radial holes. my cavity 7 formed between the barrel and the longitudinal 8 and the ring 9 grooves on the shaft surface. The roller is equipped with GO collectors along its ends, along with an annular gap 11 formed by the surface of the barrel and roller. 1–0.5 barrel diameters (protrusions). The length of the collector is 1 / 5-1 / 4 of the total length of the perimeter clearance. The rest of the gap is closed by sealing segments 12, the length of which is 4 / 5-3 / 4. The clearance of the segment prevents rotation of the segment 13. Barrel 1 is planted on the shaft 2 with tension, which prevents it from turning relative to the shaft during operation. The device works as follows. The support roller contacts with. ingot barrel 1, rotating on the trunnion 4. The inner side of the barrel 1 in the contact zone is heated to a considerable temperature. From the cooled cavity 7, the cooler flows through the annular grooves 9 to the longitudinal grooves 8, which are located closest to the line of the container with the ingot, and along the longitudinal grooves through the gaps 11 is led into the outlet headers 10. grooves only in the contact zone, providing intensive cooling of the hottest surface of the barrel. It is established that the most heated area of the surface of the roller barrel is located from the contact line in the direction of rotation by 50-60 around the circumference of the roller barrel and against rotation by 20-30, which is 1 / 5-1 / 4 the length of the barrel perimeter. Outside this zone, t, e, at 4/53/4 perimeter, the surface temperature due to external cooling with water reflected from the ingot, drops sharply and the temperature difference around the circumference of the barrel is insignificant here. Thus, in the video of the proposed design, selective cooling is provided, increasing its service life by 1.4 times. Claims of the Invention Roller for guiding and maintaining the ingot in the secondary cooling zone of a continuous metal casting plant, containing a barrel and a shaft with an axial bore and radial channels, as well as with annular and longitudinal grooves on its surface, characterized in that it is provided at the ends with collectors and sealing segments located along the annular gap formed between the barrel and the shaft, the collector length being 4/5-3 / 4 and the segment length 1 / 5-1 / 4 gap length. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 595028, cl. B 21 8-39 / 10, 1976.

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