WO2021053751A1 - 回転ロールの軸受箱、回転ロールの軸受箱の冷却方法、鋼の連続鋳造機及び鋼の連続鋳造方法 - Google Patents
回転ロールの軸受箱、回転ロールの軸受箱の冷却方法、鋼の連続鋳造機及び鋼の連続鋳造方法 Download PDFInfo
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- WO2021053751A1 WO2021053751A1 PCT/JP2019/036545 JP2019036545W WO2021053751A1 WO 2021053751 A1 WO2021053751 A1 WO 2021053751A1 JP 2019036545 W JP2019036545 W JP 2019036545W WO 2021053751 A1 WO2021053751 A1 WO 2021053751A1
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- Prior art keywords
- bearing box
- bearing
- cooling
- cooling water
- continuous casting
- Prior art date
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- 238000001816 cooling Methods 0.000 title claims abstract description 62
- 238000009749 continuous casting Methods 0.000 title claims description 41
- 229910000831 Steel Inorganic materials 0.000 title claims description 27
- 239000010959 steel Substances 0.000 title claims description 27
- 238000000034 method Methods 0.000 title claims description 20
- 239000000498 cooling water Substances 0.000 claims abstract description 64
- 230000002093 peripheral effect Effects 0.000 claims abstract description 26
- 238000005266 casting Methods 0.000 claims description 9
- 239000003921 oil Substances 0.000 description 43
- 238000012856 packing Methods 0.000 description 20
- 239000010687 lubricating oil Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000009628 steelmaking Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
- F16C13/02—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/162—Special parts or details relating to lubrication or cooling of the sealing itself
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C37/00—Cooling of bearings
- F16C37/007—Cooling of bearings of rolling bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
- B22D11/1287—Rolls; Lubricating, cooling or heating rolls while in use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/067—Fixing them in a housing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C37/00—Cooling of bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
- F16C13/02—Bearings
- F16C13/022—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
- F16C19/26—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/06—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/70—Diameters; Radii
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/40—Application independent of particular apparatuses related to environment, i.e. operating conditions
- F16C2300/54—Application independent of particular apparatuses related to environment, i.e. operating conditions high-temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2322/00—Apparatus used in shaping articles
- F16C2322/12—Rolling apparatus, e.g. rolling stands, rolls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
- F16C33/664—Retaining the liquid in or near the bearing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
- F16C33/7873—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section
- F16C33/7876—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section with sealing lips
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/80—Labyrinth sealings
- F16C33/805—Labyrinth sealings in addition to other sealings, e.g. dirt guards to protect sealings with sealing lips
Definitions
- the present invention relates to a bearing box of a rotary roll used in a high temperature environment due to radiant heat or the like, and a method of cooling the bearing box of the rotary roll, such as a bearing box that supports while rotating a slab support roll of a continuous casting machine. .. Further, the present invention relates to a steel continuous casting machine having a rotary roll supported by the bearing box, and a method for continuously casting steel using this continuous casting machine.
- the molten steel in the tundish is injected into the mold, and the solidified shell generated when the molten steel injected into the mold comes into contact with the mold is used as the outer shell, and the inside is used as the unsolidified molten steel.
- the slab is continuously withdrawn from the mold. While supporting the slab drawn from the mold with a slab support roll provided below the mold, the surface of the slab is cooled with cooling water to solidify it to the center of the thickness of the slab, and then cut to a predetermined length. Manufactures materials for hot rolling.
- the surface temperature of the slab in the continuous casting machine is 500 ° C or higher, and reaches 900 ° C or higher directly under the mold.
- the bearing box that supports the slab support roll while rotating is exposed to a high temperature atmosphere, and the oil packing for sealing the lubricating oil inside the bearing box is damaged, causing the bearing (also called "bearing") to become damaged.
- the bearing also called "bearing”
- the slab support roll becomes non-rotatable, the surface of the slab may be flawed, the central segregation of the slab may be deteriorated, and the slab may break out. Further, if the roll bearing of the roller table for transportation in the subsequent stage of the continuous casting machine is damaged, the cast pieces cannot be discharged and the continuous casting operation must be stopped.
- Patent Document 1 a method of cooling the bearing box to prevent damage to the internal bearings has been proposed.
- Patent Document 1 a plurality of cooling water grooves are provided on the outer peripheral surface of a part of the housing of the bearing box, a lid covering the cooling water grooves is arranged, and cooling water is allowed to flow inside the cooling water groove surrounded by the lid.
- a method of cooling the bearing box has been proposed.
- Patent Document 2 a bearing box of a roll for a roller table of a continuous casting machine is covered with a jacket having an inlet and an outlet for cooling air, and cooling air is introduced into the jacket. A method of cooling the bearing box has been proposed.
- the entire width of the bearing and the oil seal can be cooled by widening the installation range of the jacket for introducing the cooling air, but the cooling medium is the cooling air and the cooling medium is sufficiently cooled. There is a problem that it cannot be done.
- the present invention has been made in view of the above circumstances, and an object of the present invention is a method for cooling a rotary roll bearing box and a rotary roll bearing box capable of efficiently cooling a bearing and an oil seal with cooling water. Is to provide. Furthermore, it is an object of the present invention to provide a steel continuous casting machine having a rotary roll supported by the bearing box, and a method for continuously casting steel using the continuous casting machine.
- a rotary roll bearing box for supporting or transporting a high-temperature object, in which a bearing and a seal portion are arranged inside.
- a cooling jacket is arranged on the outer peripheral side of the bearing box so as to include at least a part of the axial range of the bearing and at least a part of the axial range of the seal portion.
- the cooling jacket has a cooling water introduction port and a cooling water discharge port.
- a rotary roll bearing box configured such that the bearing box is cooled by the cooling water supplied from the cooling water introduction port to the cooling jacket.
- At least a part of the cooling jacket arranged on the outer peripheral side of the axial range of the seal portion is arranged radially inside the cooling jacket arranged on the outer peripheral side of the axial range of the bearing.
- the rotary roll bearing box according to the above [1].
- a cooling jacket is arranged on the outer peripheral side of the bearing box so as to include at least a part of the axial range of the bearing and at least a part of the axial range of the seal portion. Cooling water is introduced into the cooling jacket from the cooling water introduction port provided in the cooling jacket to cool the bearing box.
- a method for cooling a rotary roll bearing box in which the cooling water after cooling the bearing box is discharged from a cooling water discharge port provided in the cooling jacket.
- At least a part of the cooling jacket arranged on the outer peripheral side of the axial range of the seal portion is arranged radially inside the cooling jacket arranged on the outer peripheral side of the axial range of the bearing.
- the present invention since most of the outer periphery of the bearing box is covered with cooling water, it is possible to block the transmission of radiant heat to the bearing and the seal portion, and even a rotary roll bearing used in a high temperature environment. , It is realized that the function of the bearing of the rotating roll is maintained without deterioration of the lubricating oil and the oil packing.
- FIG. 1 is a schematic configuration diagram of an example of a slab support roll arranged in a continuous casting machine.
- FIG. 2 is an enlarged view of part A in FIG.
- FIG. 3 is a configuration diagram showing an example of the bearing box proposed in Patent Document 1.
- FIG. 4 is a diagram showing the results of temperature measurement of the portion of the bearing box on the side housing side of the oil seal in a continuous casting operation for a certain day with a sheath thermocouple.
- FIG. 1 is a schematic configuration diagram of an example of a slab support roll arranged in a continuous casting machine in a steelmaking process
- FIG. 2 is an enlarged view of part A in FIG.
- FIG. 1 shows a three-piece slab support roll 20 composed of three rolls, A roll 21, B roll 22, and C roll 23, which are used as guide rolls.
- Bearing boxes 1 with bearings inside are installed at the roll chock parts at both ends of each roll, and each bearing box 1 is fixed to the frame of the guide roll segment (not shown). That is, the A roll 21, the B roll 22, and the C roll 23 are configured to rotate independently when they come into contact with the slab 30 while being supported by the bearing provided inside the bearing box 1. ..
- the slab support roll 20 shown in FIG. 1 is an internal water-cooled rotary roll.
- the configuration of the bearing box 1 will be described by taking the bearing box 1 installed on the left side of the paper surface of the A roll 21 as an example, but all the bearing boxes 1 have the same configuration.
- a bearing 2 composed of an outer ring 2a, a roller 2b, and an inner ring 2c is provided at a portion of the roll chock 21a of the A roll 21.
- a peripheral housing 7 is installed on the outer periphery of the bearing 2
- a side housing 8 is installed on one side surface (a side surface not facing the cross section of the A roll 21) on the side surface of the bearing 2, and the other side surface (A).
- a fixed housing 9 is installed on the side surface of the roll 21 on the side facing the cross section.
- the bearing 2 is fixed in a predetermined position on the roll chock 21a by these three housings.
- the peripheral housing 7 is configured to surround a part of the side surface of the bearing 2 on the side facing the cross section of the A roll 21, and the tip of the peripheral housing 7 surrounding the part of the side surface of the bearing 2 is , Facing the fixed housing 9 at a predetermined interval.
- An oil packing 3 is installed adjacent to the bearing 2 at a position where the peripheral housing 7 and the fixed housing 9 are surrounded by each other and the peripheral housing 7 and the fixed housing 9 face each other. It is formed. Further, an oil packing 4 is installed adjacent to the bearing 2 at a position where the side housing 8 and the roll chock 21a are surrounded by each other and the side housing 8 and the roll chock 21a face each other. It is formed.
- the oil packing 3 and the oil packing 4 constantly infiltrate the bearing 2 with the lubricating oil.
- the configuration formed by the oil packing 3 and the oil seal 5 and the configuration formed by the oil packing 4 and the oil seal 6 are referred to as a "seal portion".
- the bearing box 1 has a bearing 2, a peripheral housing 7, a side housing 8, a fixed housing 9, an oil packing 3, an oil packing 4, an oil seal 5, and an oil seal 6.
- Reference numeral 20a in FIG. 2 is a flow path of roll cooling water for cooling the inside of the slab support roll 20, and reference numeral 24 is a jig for water supply / drainage of roll cooling water.
- a cooling jacket 10 covering the area where the bearing 2, the oil packing 3, the oil seal 5, the oil packing 4 and the oil seal 6 are installed is provided on the outer periphery of the peripheral housing 7, and the cooling jacket 10 is provided with a cooling jacket 10.
- a water channel 14 for flowing cooling water is formed.
- the material of the cooling jacket 10 is not particularly specified, but it is preferably made of a metal such as stainless steel or carbon steel because it receives radiant heat.
- the cooling jacket 10 is provided with a cooling water introduction port 11 and a cooling water discharge port 12, and is introduced into the cooling water introduction port 11 from a cooling water supply pipe (not shown) and flows through the water channel 14 to discharge the cooling water.
- the outer periphery of the surrounding housing 7 is cooled by the cooling water discharged from the outlet 12. In this way, the radiant heat of the slab 30 is configured so as not to be transmitted to the bearing 2, the oil packing 3, the oil seal 5, the oil packing 4, and the oil seal 6.
- the cooling jacket 10 has a bearing 2 in a portion that covers the axial range of the seal portion composed of the oil packing 3 and the oil seal 5 according to the cross-sectional shape of the end portion of the A roll 21. It is arranged radially inside the part that covers the axial range of.
- the cooling water discharged from the cooling water discharge port 12 may flow down the outer periphery of the cooling jacket 10 as it is, or may be discharged to a cooling water discharge pipe (not shown).
- a cooling water discharge pipe not shown.
- the installation range of the cooling jacket 10 includes the entire axial range of the bearing 2 and the entire axial range of the seal portion, but is not limited to this form. That is, the installation range of the cooling jacket 10 may be arranged on the outer peripheral side of the bearing box 1 so as to include at least a part of the axial range of the bearing 2 and at least a part of the axial range of the seal portion.
- the cooling water introduction port 11 and the cooling water discharge port 12 are directly connected to the lid 13 forming the outer periphery of the cooling jacket 10, but the cooling water is introduced into the cooling jacket 10.
- the installation form of the port 11 and the cooling water discharge port 12 is not limited to this form.
- the cooling water may be supplied and drained through the water channel formed inside the bearing box 1.
- the present invention is applied to the bearing box 1 of the slab support roll 20 of the continuous casting machine.
- the bearing box is a rotary roll bearing box exposed to a high temperature environment due to radiant heat or the like.
- the present invention can be applied, and the application of the bearing box is not limited by the present invention.
- the internal structure of the bearing box is not limited to the above description, and the present invention can be applied as long as the bearing box includes a so-called “bearing”.
- Example 1 A test was conducted in which the bearing box of a slab support roll (guide roll) of a continuous casting machine for producing steel slab slabs by a continuous casting method was cooled by cooling water.
- the specifications of the continuous casting machine used were vertical part 3.0m, 10-point bending (upper bending band), curved part curvature radius 10.5m, 6-point straightening (lower straightening band), vertical curved slab with a machine length of 49.2m.
- With a continuous casting machine it is possible to manufacture slab slabs having a slab thickness of 220 mm and a slab width of 675 to 2100 mm.
- the bearing box to be tested is a bearing box of a slab support roll that supports slabs having a surface temperature of 700 to 900 ° C., and this bearing box includes bearings (rolling bearings) having an outer diameter of 170 mm, an inner diameter of 110 mm, and a width of 43 mm. ) Is installed.
- FIG. 3 shows an example of the bearing box proposed in Patent Document 1.
- a plurality of cooling water grooves 16 are provided on the outer periphery of the peripheral housing 7, a lid 15 covering the cooling water grooves 16 is arranged, and the lid 15 is used.
- the structure is such that cooling water is allowed to flow inside the enclosed cooling water groove 16 to cool the outer periphery of the surrounding housing 7.
- the bearing box 1A shown in FIG. 3 has the same structure as the bearing box 1 shown in FIG. 2, and the same parts are indicated by the same reference numerals, and the description thereof will be omitted.
- Example of the present invention and the bearing box 1A for comparison shown in FIG. 3 (hereinafter, also referred to as “conventional example”).
- 15 L / min of cooling water per minute was introduced into the water channel 14 and the cooling water groove 16 to cool the bearing box 1 and the bearing box 1A.
- the cooling water after cooling the bearing box 1 and the bearing box 1A flows down the outer periphery of the bearing box as it is in both the bearing box 1 according to the present invention and the bearing box 1A as a conventional example.
- FIG. 4 shows the results of temperature measurement of the portion of the oil seal 6 on the side housing 8 side indicated by the reference numeral “P” in FIGS. 2 and 3 by a sheath thermocouple in a continuous casting operation for a certain day.
- the period during which the temperature is locally low is the period during which continuous casting is not performed between the continuous casting operation and the continuous casting operation, and during the other period, continuous casting (continuous casting) of molten steel is performed. It is a period of time.
- the temperature of the portion of the oil seal 6 during continuous casting is 20 to 40 ° C. lower than that of the conventional example, and the influence of the radiant heat from the slab on the oil seal 6 It was confirmed that the amount can be reduced.
- the portion of the oil seal 5 is not covered with the lid 15, whereas in the example of the present invention, the portion of the oil seal 5 is also covered with the cooling jacket 10.
- the temperature of the portion of the oil seal 5 was also lowered by about 70 to 80 ° C. in the example of the present invention as compared with the conventional example.
- Example 2 Using the vertical bending type slab continuous casting machine used in Example 1, the ductility of the slab shows a minimum value between 700 ° C. and 900 ° C., especially at 800 ° C., that is, the slab surface. Steel that is prone to cracking was cast.
- the slab width of the slab to be manufactured was set to 2100 mm, which is the maximum width of the continuous casting machine.
- the bearing box near the end in the width direction of the slab on the left side from the upstream side to the downstream side of the strand is the bearing box (conventional type) proposed in Patent Document 1 shown in FIG.
- the bearing box near the end in the width direction of the slab on the right side is the bearing box according to the present invention shown in FIG.
- the surface of the slab may be distorted and the surface of the slab may be cracked.
- the bearing box is arranged as described above, and in the level A continuous casting operation, the surface temperature of the slab is set to a surface temperature of 700 ° C. to 900 ° C. including 800 ° C., which is the temperature at which surface cracking is likely to occur.
- the amount of secondary cooling water up to the lower correction zone was adjusted so as to be.
- the amount of secondary cooling water up to the lower straightening zone was adjusted so that the surface temperature of the slab in the lower straightening zone was in the range of 900 ° C. to 1000 ° C.
- the chemical composition of the molten steel is [C]; 0.03 to 0.05% by mass, [Si]; 0.25 to 0.35% by mass, [Mn]; 1.3 to 1.4% by mass, [P]. ]; 0 to 0.015% by mass, [S]; molten steel in the range of 0 to 0.002% by mass was continuously cast for 10 heats at both level A and level B. The mass of molten steel in one heat was 245 tons.
- Bearing box 1 Bearing box 1A Bearing box 2 Bearing 2a Outer ring 2b Roller 2c Inner ring 3 Oil packing 4 Oil packing 5 Oil seal 6 Oil seal 7 Peripheral housing 8 Side housing 9 Fixed housing 10 Cooling jacket 11 Cooling water inlet 12 Cooling water discharge port 13 Lid 14 Water channel 15 Lid 16 Cooling water groove 20 Fragment support roll 20a Roll Cooling water flow path 21 A roll 21a A roll roll chock 22 B roll 23 C roll 30 slab
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mounting Of Bearings Or Others (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
Description
[1]軸受とシール部とが内部に配置された、高温物体を支持または搬送するための回転ロールの軸受箱であって、
前記軸受の軸方向範囲の少なくとも一部及び前記シール部の軸方向範囲の少なくとも一部を含むように、軸受箱の外周側に冷却ジャケットが配置され、
前記冷却ジャケットは、冷却水導入口及び冷却水排出口を有し、
前記冷却水導入口から、前記冷却ジャケットに供給された冷却水によって、前記軸受箱が冷却されるように構成されている、回転ロールの軸受箱。
[2]前記シール部の軸方向範囲の外周側に配置された冷却ジャケットの少なくとも一部は、前記軸受の軸方向範囲の外周側に配置された冷却ジャケットよりも径方向内側に配置される、上記[1]に記載の回転ロールの軸受箱。
[3]軸受とシール部とが内部に配置された、高温物体を支持または搬送するための回転ロールの軸受箱の冷却方法であって、
前記軸受の軸方向範囲の少なくとも一部及び前記シール部の軸方向範囲の少なくとも一部を含むように、軸受箱の外周側に冷却ジャケットを配置し、
前記冷却ジャケットに設けた冷却水導入口から、前記冷却ジャケットに冷却水を導入して前記軸受箱を冷却し、
前記軸受箱を冷却した後の前記冷却水を、前記冷却ジャケットに設けた冷却水排出口から排出する、回転ロールの軸受箱の冷却方法。
[4]前記シール部の軸方向範囲の外周側に配置された冷却ジャケットの少なくとも一部は、前記軸受の軸方向範囲の外周側に配置された冷却ジャケットよりも径方向内側に配置される、上記[3]に記載の回転ロールの軸受箱の冷却方法。
[5]上記[1]または上記[2]に記載の回転ロールの軸受箱に備えられた軸受で支持された1つ以上の回転ロールを用いて鋳片を支持または案内する、鋼の連続鋳造機。
[6]上記[5]に記載の鋼の連続鋳造機を用いて鋼鋳片を連続鋳造する、鋼の連続鋳造方法。
連続鋳造方法によって鋼のスラブ鋳片を製造する連続鋳造機の鋳片支持ロール(ガイドロール)の軸受箱で、軸受箱を冷却水によって冷却する試験を実施した。使用した連続鋳造機の仕様は、垂直部3.0m、10点曲げ(上部曲げ帯)、湾曲部曲率半径10.5m、6点矯正(下部矯正帯)、機長49.2mの垂直曲型スラブ連続鋳造機で、鋳片厚みが220mm、鋳片幅が675~2100mmのスラブ鋳片の製造が可能である。試験対象の軸受け箱は、表面温度が700~900℃の鋳片を支持する鋳片支持ロールの軸受箱であり、この軸受箱には、外径170mm、内径110mm、幅43mmの軸受(転がり軸受)が設置されている。
実施例1で使用した垂直曲げ型スラブ連続鋳造機を用い、鋳片表面温度が700℃から900℃までの間で、特に800℃において鋳片の延性が極小値を示す、即ち、鋳片表面に割れが生じやすい鋼を鋳造した。製造する鋳片の鋳片幅は当該連続鋳造機の最大幅である2100mmとした。このスラブ連続鋳造機の下部矯正帯において、ストランド上流側から下流側に向かって左側の鋳片幅方向端部に近い軸受箱は、図3に示す特許文献1に提案される軸受箱(従来型)とし、向かって右側の鋳片幅方向端部に近い軸受箱は、図2に示す本発明に係る軸受箱とした。尚、垂直曲げ型スラブ連続鋳造機の下部矯正帯では、鋳片表面に歪みが付与されて、鋳片表面に割れが発生する場合がある。
1A 軸受箱
2 軸受
2a 外輪
2b ころ
2c 内輪
3 オイルパッキン
4 オイルパッキン
5 オイルシール
6 オイルシール
7 周囲ハウジング
8 側面ハウジング
9 固定ハウジング
10 冷却ジャケット
11 冷却水導入口
12 冷却水排出口
13 蓋
14 水路
15 蓋
16 冷却水溝
20 鋳片支持ロール
20a ロール冷却水の流路
21 Aロール
21a Aロールのロールチョック
22 Bロール
23 Cロール
30 鋳片
Claims (6)
- 軸受とシール部とが内部に配置された、高温物体を支持または搬送するための回転ロールの軸受箱であって、
前記軸受の軸方向範囲の少なくとも一部及び前記シール部の軸方向範囲の少なくとも一部を含むように、軸受箱の外周側に冷却ジャケットが配置され、
前記冷却ジャケットは、冷却水導入口及び冷却水排出口を有し、
前記冷却水導入口から、前記冷却ジャケットに供給された冷却水によって、前記軸受箱が冷却されるように構成されている、回転ロールの軸受箱。 - 前記シール部の軸方向範囲の外周側に配置された冷却ジャケットの少なくとも一部は、前記軸受の軸方向範囲の外周側に配置された冷却ジャケットよりも径方向内側に配置される、請求項1に記載の回転ロールの軸受箱。
- 軸受とシール部とが内部に配置された、高温物体を支持または搬送するための回転ロールの軸受箱の冷却方法であって、
前記軸受の軸方向範囲の少なくとも一部及び前記シール部の軸方向範囲の少なくとも一部を含むように、軸受箱の外周側に冷却ジャケットを配置し、
前記冷却ジャケットに設けた冷却水導入口から、前記冷却ジャケットに冷却水を導入して前記軸受箱を冷却し、
前記軸受箱を冷却した後の前記冷却水を、前記冷却ジャケットに設けた冷却水排出口から排出する、回転ロールの軸受箱の冷却方法。 - 前記シール部の軸方向範囲の外周側に配置された冷却ジャケットの少なくとも一部は、前記軸受の軸方向範囲の外周側に配置された冷却ジャケットよりも径方向内側に配置される、請求項3に記載の回転ロールの軸受箱の冷却方法。
- 請求項1または請求項2に記載の回転ロールの軸受箱に備えられた軸受で支持された1つ以上の回転ロールを用いて鋳片を支持または案内する、鋼の連続鋳造機。
- 請求項5に記載の鋼の連続鋳造機を用いて鋼鋳片を連続鋳造する、鋼の連続鋳造方法。
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CN201980100297.XA CN114391070A (zh) | 2019-09-18 | 2019-09-18 | 旋转辊的轴承箱、旋转辊的轴承箱的冷却方法、钢的连续铸造机以及钢的连续铸造方法 |
KR1020227008157A KR20220044586A (ko) | 2019-09-18 | 2019-09-18 | 회전 롤의 베어링 박스, 회전 롤의 베어링 박스의 냉각 방법, 강의 연속 주조기 및 강의 연속 주조 방법 |
EP19945586.6A EP4006369B1 (en) | 2019-09-18 | 2019-09-18 | Bearing box for rotating roll, cooling method for rotating roll bearing box, steel continuous casting machine, and steel continuous casting method |
US17/761,761 US20220373033A1 (en) | 2019-09-18 | 2019-09-18 | Bearing box for rotating roller, method for cooling bearing box for rotating roller, steel continuous casting machine, and steel continuous casting method |
BR112022004593A BR112022004593A2 (pt) | 2019-09-18 | 2019-09-18 | Caixa de mancal para rolete rotativo, método para resfriar caixa de mancal para rolete rotativo, máquina de fundição contínua de aço e método de fundição contínua de aço |
JP2021546105A JP7318716B2 (ja) | 2019-09-18 | 2019-09-18 | 回転ロールの軸受箱、回転ロールの軸受箱の冷却方法、鋼の連続鋳造機及び鋼の連続鋳造方法 |
PCT/JP2019/036545 WO2021053751A1 (ja) | 2019-09-18 | 2019-09-18 | 回転ロールの軸受箱、回転ロールの軸受箱の冷却方法、鋼の連続鋳造機及び鋼の連続鋳造方法 |
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US (1) | US20220373033A1 (ja) |
EP (1) | EP4006369B1 (ja) |
JP (1) | JP7318716B2 (ja) |
KR (1) | KR20220044586A (ja) |
CN (1) | CN114391070A (ja) |
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AT526034A1 (de) * | 2022-08-09 | 2023-08-15 | Primetals Technologies Austria GmbH | Strangführungsrolle zum Führen eines metallischen Strangs in einer Stranggießanlage |
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- 2019-09-18 KR KR1020227008157A patent/KR20220044586A/ko not_active Application Discontinuation
- 2019-09-18 CN CN201980100297.XA patent/CN114391070A/zh active Pending
- 2019-09-18 EP EP19945586.6A patent/EP4006369B1/en active Active
- 2019-09-18 WO PCT/JP2019/036545 patent/WO2021053751A1/ja unknown
- 2019-09-18 BR BR112022004593A patent/BR112022004593A2/pt unknown
- 2019-09-18 US US17/761,761 patent/US20220373033A1/en active Pending
- 2019-09-18 JP JP2021546105A patent/JP7318716B2/ja active Active
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Also Published As
Publication number | Publication date |
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EP4006369B1 (en) | 2023-07-05 |
JP7318716B2 (ja) | 2023-08-01 |
BR112022004593A2 (pt) | 2022-05-31 |
KR20220044586A (ko) | 2022-04-08 |
US20220373033A1 (en) | 2022-11-24 |
JPWO2021053751A1 (ja) | 2021-03-25 |
EP4006369A4 (en) | 2022-07-27 |
CN114391070A (zh) | 2022-04-22 |
EP4006369A1 (en) | 2022-06-01 |
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