RU2254204C1 - Roller section of machine for metal continuous casting - Google Patents

Abstract

FIELD: processes and equipment for continuous casting of metal, namely designs of roller sections for guiding ingot at outlet of mold.

SUBSTANCE: apparatus includes supporting housing in the form of mutually joined at least four box like cross section frames arranged along path of ingot passing. On inner flanges of said four frames turned to ingot path are mounted in bearing assemblies on chocks having inlet openings for lubricant: guiding rollers, manifold for supplying lubricant, lubricant feeders communicated through tube circuits with inlet opening for lubricant in chocks. Each of four frames has outer detachable walls. Roller section is provided at least with four tubular struts. Each strut is arranged in inner cavity of one of frames and it provides successive communication of lubricant feeders coupled through tube circuits with openings of inner flanges of frames and matched with inlet openings for lubricant in chocks. Each strut is separately connected with manifolds for supplying lubricant arranged in plane normal relative to strut and embracing path of ingot passing.

EFFECT: enhanced quality of cast metal due to reliable lubrication of bearing assemblies of guiding rollers and prevention of their arresting, elimination of damage of feeders and tube circuits, lowered operational costs, improved capability for restoration.

3 dwg

Description

The invention relates to metallurgy, relates to continuous metal casting machines, in particular the construction of roller sections for supporting and guiding the ingot exiting the mold.

A roller section of a continuous metal casting machine is known, including a support frame on which guide rollers, a supply lubricating manifold, lubricating feeders connected by pipe distributions with lubricating inlet openings of pillows are mounted on bearings in pillows with lubricating inlet holes (see, for example, drawing of the company UA1 , Austria KMR - SU-80.00.00-3300 / RA / 001, 1997).

A disadvantage of the known design is the unsatisfactory rigidity of the support frame, due to the design in which the roller cushions are mounted on the column shelves of the bed elements, which means large displacements of the rollers under load, distortion of the passage of the ingot, leading to hot cracks and segregation of the cast metal. Another disadvantage of the known technical solution is related to the fact that the elements of the lubrication system — lubricating feeders, pipe distributions are fixed on the external faces of the support bed and are exposed to the aggressive environment of this zone of the continuous casting machine — high temperature, water and steam, which leads to failures of the lubrication system, slowing down the rotation and stopping the rotation of the rollers, which also results in defects in hot metal cracks.

Known roller section of a continuous metal casting machine, including a support frame made in the form of interconnected, located along the passage of the cast ingot, at least four box-shaped cross-sections, on the inner shelves of which are facing the passage of the ingot, are mounted on bearings in pillows with lubricating inlets, guide rollers, inlet of the lubricating manifold, lubricating feeders connected by piping to the lubricating inlets and pillows (see, for example, application 2001107114, 03.20.01)

This design meets the conditions of rigidity, because supporting elements of the bed frame for rollers are four longitudinal frames, made of box-shaped cross section and located directly under the pillows of the rollers, which creates a favorable pattern of perception of the external load on the section from the metallostatic pressure of the liquid phase of the ingot. However, as in the previous known design, the elements of the lubrication system are also located in open areas, and as already explained for the previous example, this does not ensure the reliability of its operation. In addition, in both analogues, the feeders are connected directly to the pillows by pipe distributions, and when dismantling the pillows, preliminary dismantling of the pipe distributions is required, which increases the complexity of the operation of the roller section. Each of the lubricating feeders is also independently connected to the supplying lubrication manifold by a pipe wiring, which increases their number, complicates the assembly and disassembly of the roller section, increases the cost of its operation due to the need for frequent replacement of pipe wiring and lubricant feeders operating in an open aggressive environment.

The desired technical result of the proposed technical solution is to achieve a high quality structure of continuous metal casting on a machine and reduce operating costs by increasing the reliability of lubrication of bearings of the guide rollers of the section, eliminating damage during operation of elements of the lubrication system - lubricating feeders, pipe wiring, and improving maintainability of the section.

This is achieved by the fact that in the roller section of the continuous metal casting machine, including a support frame, made in the form of interconnected, located along the passage of the cast ingot, at least four box-shaped cross sections on the inner shelves of which are facing the passage ingot, mounted on bearings in pillows with lubricated inlets, guide rollers, supply lubrication manifold, lubrication feeders connected by piping to lubricant with pillow inlets, each of the four box-shaped cross-sections is made with external removable walls, and the roller section is equipped with at least four pipe risers, each of which is placed in the inner cavity of one of the four box-shaped cross-sections and sequentially connects the lubricating feeders connected by piping with holes made in the inner shelves of the frames coinciding with the inlet lubricating holes of the pillows, each of the risers independently connected ene lubricant to the supply manifold, positioned in a plane perpendicular to the risers, and the passage of the male portion of the ingot.

The essence of the invention is explained below in more detail with reference to the accompanying drawings, in which

Figure 1 is a General view of the roller section in accordance with the invention with conditionally torn outer removable walls of the frames of the box-shaped cross-section of the support frame;

Figure 2 is a transverse section through the roller section along the inlet lubricating manifold and local breakouts along the inlet lubricating holes in the frame shelf and pillow;

Figure 3 is an enlarged local breakout along the supplying lubricant holes in the frame shelf and the roller cushion.

The proposed roller section of the continuous metal casting machine includes a support frame made in the form of four box-shaped cross-section frames 1 paired together as a whole, i.e. one-piece, by ties 2. The number of longitudinal frames of a box-shaped cross section (four) is due to the use of double-support rollers for guiding two opposite faces of the cast ingot, i.e. beneath each along the ingot passage, near the pillows there is a box-shaped cross-sectional frame that receives loads from the pressure of the liquid phase of the ingot on the roller bearing. Pairwise connected by ties 2 of the frame 1 are interconnected to close the bed section of the passage of the ingot spacers 3 using bolts 4.

On the shelves of the frames 1, facing inward to the passage of the ingot 5, guide rollers 9 are mounted on bearings 6 in the pillows 7 with lubricant inlets 8. Lubricating feeders are indicated by 10, pipe wiring connecting the feeders 10 with pillows 7 are indicated by 11, inlet grease manifold - 12.

The roller section is equipped with four pipe risers 13, each of which is independently connected to the supply lubrication manifold 12, located in a plane perpendicular to the risers 13, and made in this plane U-shaped, covering the support frame and the passage of the ingot. Each of the risers 13 along the length of the roller section within the internal cavities of the box-shaped cross-section frames sequentially connects several lubricating feeders 10, each of which in turn is connected by holes 11 to the holes 14 made in the shelf of the frame 1 under the pillows 7, which coincide with the input lubricating holes 8 pillows 7. Pillows 7 are mounted on the inner shelves of the frames 1 with bolts 16.

The placement of all elements of the lubrication system of the roller section inside the cavities of the frame of the box-shaped cross-section is achieved by making their outer walls 17 detachable, fixed by bolts 18.

The device operates as follows.

In the working process, the ingot 5 exiting the mold of the continuous casting machine is guided by rollers 9, the solution of which is adjusted to the size of the ingot, upon contact with which the rollers begin to rotate. At the same time, a centralized grease station, not shown in the drawings, is turned on, pumping oil (arrow 19) into the inlet manifold 12, after filling which the oil is evenly distributed among the four pipe risers 13 and the lubricating feeders 10, from which the oil through the holes 11 and through the holes 14 and 15 enters the cavity of the pillows 7, providing lubrication of the bearings 6 and reliable rotation of the rollers 9.

The proposed lubricant supply scheme from the supply manifold to four independent risers allows for uniform and guaranteed lubricant delivery to all four rows of bearing bearings of the guide rollers, their reliable operation with the exception of slipping or rotation stop.

The placement of all lubricating elements in closed cavities prevents their damage, and the supply through the holes in the frame shelves and the supporting planes of the pillows allows you to dismantle and adjust the rollers without first disassembling the lubrication system, which reduces operating costs and ensures the reliability of the roller section.

Thus, the invention allows to obtain high quality cast metal and reduce operating costs of roller sections of continuous metal casting machines.

Claims (1)

A roller section of a continuous metal casting machine containing a support frame made in the form of at least four box-shaped cross sections connected to each other, located along the passage of the cast ingot, on the inner shelves of which are facing the passage of the ingot, are mounted on bearings in bearing pads with lubricated inlets, guide rollers, inlet lubrication manifold, lubrication feeders connected by piping to lubricated inlets pillows, characterized in that each of the four frames of the box-shaped cross section is made with external removable walls, and the roller section is equipped with at least four pipe risers, each of which is placed in the inner cavity of one of the four frames of the box-shaped cross section and sequentially connects the lubricating feeders connected by piping with holes made in the inner shelves of the frames coinciding with the inlet lubrication holes of the pillows, each of the risers independently connected to an inlet lubricating manifold located in a plane perpendicular to the risers and made covering the area of passage of the ingot.

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