KR19990011380A - Bearing housing with labyrinth ring to prevent leakage of converter support bearings - Google Patents

Abstract

The present invention is a grease (GREASE) having a high viscosity in the existing double oil seal for the purpose of preventing the splashing of oil in the oil leaked by the gap between the collar and oil seal due to the converter tilt during steelmaking operation. It is a device to prevent oil leakage by filling.

When the converter tilt motor rotates and rotates the bull gear fixed to the trunnion shaft, the converter is tilted. At this time, both trunnion shafts are supported by bearings to reduce rotational resistance. It is a power transmission shaft that transmits the rotational force of the motor to the shaft and is completely fixed by bolts to the bearing stand, which is the lower structure, and the other side is horizontal to absorb the thermal expansion of the converter generated during the converter operation with the free shaft. It consists of a moving axis that can be moved by

The bearings on both shafts are self-aligning bearings, and the free shafts install a ladder bearing to the bottom to absorb the expansion amount.

Self-aligning bearings have an oil bath lubrication system, and ladder bearings are grease intensive lubrication.

Self-aligning bearings are bearings that significantly reduce rotational frictional resistance (RADIAL SPHERICAL ROLLER BEARlNG 9), bearing housing caps (BEARING HOUSING CAP 1 and 5) to protect the bearings and supply oil, and bearing housings to support and store oil BEARING HOUSING BASE 2, Collar 3, 4 for adjusting gaps and supporting oil seals when converting converters, Double oil seals (DOUBLE OIL SEAL 11, 12) to prevent oil leakage and oil leakage prevention It is divided into LABYRING RING 8 which supplies grease.

Description

Bearing housing with labyrinth ring to prevent leakage of converter support bearings

The present invention relates to a bearing housing provided with an anti-leakage labyrinth ring of a converter support bearing, and more particularly, to prevent leakage of lubricating oil to be supplied to a bearing which reduces frictional resistance generated when tilting the converter.

In detail, the grease supply labyrinth ring is inserted in the middle of the double oil seal, and if a gap occurs between the collar and the oil seal due to the impact load on the bearing, the grease filled in the labyrinth ring leaks through the gap. Since the oil inside can not be blocked by the filled grease, it is a bearing housing equipped with a labyrinth ring that prevents oil leakage and blocks the flow of oil to prevent fire.

Conventionally, the impact load during tilting of the converter is transmitted to the bearing, and this force creates a gap between the collar and the oil seal, and the lubricating oil leaks into this gap, contaminating the surroundings, and slag and waste water generated during the converter operation. This oil has splashed and caused a fire.

In addition, in order to prevent fire, unnecessary protection cover was over installed in the bearing housing part.Because of such protection cover, the bearing housing is not easily accessible and the cause of the failure is not identified quickly. Difficulties have been caused.

In addition, leaking lubricating oil prevents the oil supply to the bearing from being unsatisfactory, thereby facilitating the reduction of bearing life and overloading the entire career facility.

In addition, these leaking oils have been a cause of considerable waste in lubricating oil usage.

The present invention is to solve the above problems, the purpose of the installation and repair is easy to prevent the leakage of the lubricating oil supplied to the bearing to extend the life of the bearings and converter equipment and to prevent the fire ring ring It is to provide a bearing housing installed.

To understand the characteristics and structure of the present invention, first understand the operating conditions of the converter and the housing structure and use of the converter support bearing.

The converter is a steel making facility that produces molten steel by injecting and refining at about 1600 ° C. by injecting additional raw materials into the molten iron drawn from the blast furnace.

Therefore, the operation of this facility is carried out under the conditions of high temperature, dust, slag and sludge, high load and impact, and all these conditions are transferred to the converter support bearing.

At this time, the load transmitted to the bearing is about 610 tons, the temperature of the bearing part is about 200 ℃ during operation, the thermal expansion of the converter itself by the temperature is up to 24 mm, the maximum torque is 195 TON-m, and the water splashes during drilling. Things often happen.

Therefore, the specification of the bearing used in this facility is a large self-aligning roller bearing, one side is FIXED DRIVE SIDE and the other is MOVING FREE SlDE which absorbs thermal expansion up to 50mm. . Referring to the detailed specifications of the converter facility and converter support bearing based on Figure 1 as follows.

-Converter capacity: 110 T0N (NORMAL) / 120 TON (MAX)

Converter tilt load: 610 T0N

Converter tilt speed: 1 rpm

-Converter torque (TORQLE): MAX. 195 TON-m

Bearing specification number (self-aligning roller bearings, manufactured by NSK)

Fixed stage: SL780-3

* Free End: 230 / 600E4

(LADDER BEARING: 65 TRL 01-expansion absorption up to ± 50㎜)

The converter support bearing housing designed in consideration of these specifications and operating conditions is as shown in Figure 2 (conventional bearing housing assembly).

As shown in FIG. 2, the self-aligning roller bearings subjected to high loads and impact loads have proper lubrication in order to function properly and extend their life.

Therefore, the bearing is adopting oil intensive lubrication method. In this facility, even if a double oil seal is installed due to shock and fluctuations during operation, leakage occurs through the gap between the collar and the oil seal. Often followed.

Therefore, the present invention further inserts a grease supply labyrinth ring between the conventional double oil seal as shown in Figure 3 in order to prevent leakage through the double oil seal, through which grease between the collar and the oil seal To prevent leakage of oil.

4 is a detail of the grease supply labyrinth ring, which is a key part of the present invention, inserted in the middle of a double oil seal.

If there is a gap between the oil seal and the collar due to the impact load on the bearings, the oil and grease will mix and leak into the gap.The grease's viscosity can minimize the oil leakage and also the oil flow. Can be blocked.

Fig. 5 is a lubrication system diagram of a bearing housing adopted in the present invention, and shows a basic lubrication system (centralized system, OIL-BATH type) for supplying lubrication oil and an auxiliary lubrication system for supplying grease.

In addition, grease lubrication can be used separately from the line used for the lubrication of the thermal expansion bearing used in the free end of the plant.

1 is a schematic diagram of the converter structure and main specifications

Figure 2 is a bearing housing assembly installed conventional oil seal only

Figure 3 is an assembly view of the bearing housing in which the present invention labyrinth ring is installed on the oil seal

Figure 4 is a leaky labyrinth ring (LABYRING RING) detail of the present invention

5 is a bearing lubrication system applied to the present invention

* Explanation of symbols for main parts of the drawings

1, 5: housing cap 2: housing base

3, 4: color 8: labyrinth ring

9: RADIIAL SPHERICAL ROLLER BEARING

11, 12: double oil seal

As shown in FIG. 3, the installation position of the present invention is intermediate between the housing caps 1 and 5 and the collars 3 and 4, and is also provided between the double oil seals 11 and 12.

When the labyrinth ring (LABYRINTH RING 8) is inserted into the oil seal, it is installed on the outer surface of the collar like the seal.

The collars 3 and 4 are spherical in order to minimize gaps due to impact and fluctuations of the bearings 9, and oil seal contact surfaces must be polished to increase the sealability when the oil seal is mounted. Collar clearance should be kept constant for installation and dismantling management.

The housing caps (1, 5) cover the outer ring of the bearing and guide the oil, and the groove of the oil seal mounting part is polished, and is spherically processed like the collar, You must maintain a gap.

According to the present invention, when an impact load is applied to the bearing during the operation of the converter, and a gap occurs between the collar and the oil seal, the grease filled in the labyrinth ring instead of the lubricating oil through the gap is the oil seal and the collar of the oil seal. Leaking through the gap, the oil seal inside is blocked by the pressure of the filled grease, preventing the oil from leaking and preventing leakage.

Therefore, the present invention provides a sufficient effect of preventing the leakage of lubricating oil in the bearing housing by additionally installing only a labyrinth ring in a conventional installation, and prolongs the life of the bearing by supplying continuous and sufficient oil to the bearing and at the same time leaks oil. It is a very useful invention for easy installation and repair and protection and maintenance of the entire converter facility while preventing the fire caused by the simple structure.

Claims (3)

In the converter support bearing of the steelmaking facility, the labyrinth ring 8 is halfway between the housing cap 5 of the bearing supporting the converter and the collars 3 and 4 and between the double oil seals 11 and 12. Is installed on. A bearing housing with a labyrinth ring for preventing leakage of converter support bearings, wherein the labyrinth ring (LABYRINTH RING 8) is installed on the outer surface of the collar like a seal when the labyrinth ring (8) is inserted into the oil seal. 2. The collar 3, 4 is machined into a spherical surface to minimize gaps due to impact and rocking of the bearing 9, and the oil seal contact surface is polished to increase the sealability when mounting the oil seal. Bearing housing with a labyrinth ringer for preventing leakage of converter support bearing, characterized in that the gap between the housing cap and the collar is maintained for convenience of installation and release. The housing caps 1 and 5 cover the outer ring of the bearing and guide the oil, and the grooves of the oil seal mounting part are polished and spherically processed like the collar. , Bearing housing provided with a labyrinth ring for preventing leakage of converter support bearing, characterized in that the gap is maintained)