RU2217673C2 - Cantilever furnace roller - Google Patents

Abstract

FIELD: mechanical equipment in heating and thermal furnace having roller hearths. SUBSTANCE: roller has cooled roller body fixed to shaft having longitudinal orifice, which communicates with cooling water supplying system. Shaft is mounted by two bearing brackets, which are located in case walls and equipped with cross-arm. Feeding nipple to feed water into barrel is mounted on cross-arm between bearing brackets. Nipple communicates with shaft longitudinal orifice through ring-shaped groove formed in cross-arm and radial orifices formed in shaft. Longitudinal grooves made at the shaft end near barrel are connected with barrel hollow and radial orifices for water input into case. Water output orifices are formed in case bottom. Roller rotary actuator is made as low-frequency electric AC motor linked with shaft end. EFFECT: increased service life of cantilever roller. 2 dwg

Description

 The invention relates to the mechanical equipment of heating and thermal furnaces of ferrous metallurgy, and more specifically to the mechanical equipment of furnaces with a roller hearth.

 Known cantilever furnace roller containing a barrel mounted on a shaft mounted on two bearing bearings, and having an individual rotation drive mounted on the shaft (Germany 1144747, CL 18 from 9/00, z. 16.05.57, op. 26.09.63 )

 The barrel of this video is uncooled.

The disadvantage of this kiln roller is that the scope of uncooled rollers is limited by the heat resistance of the metal of the barrel of the roller and the temperature of the products to 900 ^o C.

 When heating products to higher temperatures, as well as when transporting heavy products or with a large width of the furnace, cooled furnace rollers are used.

 Of the known cantilever furnace rollers, the closest in technical essence is the roller containing a cooled barrel mounted on a shaft mounted on two bearing bearings with an axial bore connected to the cooling water supply system and an individual roller rotation drive (Guide to the Designer of Rolling Furnace Furnaces, etc. II. Edited by V.M. Tymchak. - M.: Metallurgy, 1970, p. 674, fig. XXII-9).

 Water is supplied for cooling the barrel from the shaft end through a pipe installed in the axial hole of the shaft, and water is removed through the gap between the outer wall of the pipe and the axial hole of the shaft in the tank attached to the bearing support beam.

 The individual drive is made in the form of an electric motor with a gearbox mounted on the shaft between the bearing bearings.

 A disadvantage of the known design of the cantilever furnace roller is that when supplying and discharging cooling water through the shaft end, a gear must be worn on the shaft to rotate the shaft, which worsens the working conditions of the gear, since the shaft is heated by the water discharged from the roller barrel, and the result reduces its service life.

 In addition, with such a design of the furnace roll, it is necessary to have a shaft of large length, since the gearbox is mounted on the shaft and the water discharge unit also lengthens the shaft, and this reduces its rigidity and, therefore, the durability of its operation decreases. In this case, the cooling conditions of the barrel of the roller are worsened, since there is a contact of the pipe through which cold water is supplied with the heated water removed from the barrel at a considerable distance, which increases the temperature of the water entering the barrel and worsens the conditions for its cooling.

 Another disadvantage is the significant dimensions of the roller outside the furnace.

 An object of the present invention is to provide a cantilever kiln roller having higher durability.

 The task is achieved in that the cantilever furnace roller containing a cooled drum barrel, mounted on a shaft mounted on two bearing bearings with an axial bore connected to the cooling water supply system, and an individual roller rotation drive, according to the invention, is provided with a housing with a traverse, in the walls of which bearing bearings of the shaft are located, and in the traverse between the bearings, a nozzle for supplying water to the barrel is mounted, communicated through an annular groove made in the traverse and radial from Holes are made in the shaft, with an axial hole of the shaft, longitudinal at the end of the shaft at the barrel, grooves connected to the barrel cavity and radial holes made in the shaft for draining water into the housing, holes for draining water from the housing are made in the base of the housing, the rotation drive is made in the form of a low-frequency alternating current motor connected to the shaft end.

 Such a constructive implementation of the cantilever furnace roller allows to increase its durability by improving the cooling conditions and increasing the rigidity of the shaft.

 Cooling conditions are improved by reducing the path of movement of cold water to the barrel of the roller and reducing the area and length of contact of heated water with the shaft, since the water is supplied into the axial hole of the shaft and the heated water is removed from the barrel through radial holes between the bearing supports, and not from the end. This also allows to reduce the length of the shaft and, therefore, increase its rigidity and use a gearless drive rotation.

 The use of a closed water tank (case with traverse) eliminates water pollution, its splashing and improves service conditions.

To explain the invention, a specific embodiment of the invention is given below with reference to the accompanying drawings, in which:
In FIG. 1 - shows a cantilever furnace roller, a General view in section; figure 2 is a section aa in figure 1.

 The cantilever kiln roller consists of a cooled barrel 1, mounted on the end of the shaft 2 by means of a flange 3. The shaft 2 is installed in bearing bearings 4 and 5 mounted in the walls of the housing 6, mounted on the foundation outside the furnace.

 Between the bearings 4 and 5 on the housing 6, a crossarm 7 is installed, in which a pipe 8 for supplying water to the barrel 1 of the roller is mounted through a shaft 2, in which radial holes 9 are made, connected to the pipe 8 through an annular groove 10 made in the crosshead 7, and axial bore 11.

 To remove water from the barrel 1 of the furnace roller, the shaft 2 is equipped with three longitudinal grooves 12 and radial holes 13 made in the region between the water supply pipe 8 and the bearing support 5. The radial holes 13 are enclosed by a casing 14.

 At the base of the walls of the housing 6, holes 15 are provided for draining water flowing out of the furnace roller 1.

 A low-frequency AC motor 16, providing the effect of a gearless drive, is connected to the shaft 17 of the shaft 2 by means of a coupling 18.

 The cantilever furnace roller is driven from the electric motor 16 by means of a shaft 2.

 To cool the barrel 1 of the furnace roller, cold water through the pipe 8, the annular groove 10, the radial holes 9 and the axial hole 11 enters the barrel 1 of the furnace roller. Heated water is removed from the barrel 1 of the roller along the longitudinal grooves 12 and the radial holes 13. Beating off the walls of the casing 14, the water flows into the box-shaped housing b and is removed from the housing 6 through the holes 15.

 The proposed cantilever furnace roller in comparison with the known ones allows to increase the overhaul period of operation, reduce the dimensions of the roller outside the furnace.

Claims (1)

A cantilever furnace roller containing a cooled roller barrel mounted on a shaft mounted on two bearing bearings with an axial bore connected to a cooling water supply system, and an individual roller rotation drive, characterized in that it is provided with a housing with a traverse, in the walls of which bearing bearings are located shaft, and in the traverse between the bearings, a nozzle of water supply to the barrel is mounted, communicated through an annular groove made in the traverse and radial holes made in the shaft, with an axial with a shaft aperture, longitudinal grooves are made at the shaft end at the barrel, connected to the barrel cavity and radial shaft openings for water drainage into the body, holes for water drainage from the body are made in the base of the body, while the rotation drive is made in the form of a low-frequency alternating current electric motor connected with shaft end.

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