CN213410073U - Device for rapidly cooling bearing of supporting roller of hot straightening machine - Google Patents

Abstract

The utility model discloses a device for rapidly cooling a bearing of a back-up roll of a hot straightening machine, which comprises a plurality of compressed air pipes horizontally arranged on one side of the back-up roll of the straightening machine, wherein the length of each compressed air pipe is 4000mm, the pipe diameter of each compressed air pipe is 15mm, two rows of blowing holes are arranged on a pipe body of each compressed air pipe at an included angle of 90 degrees, the hole distance of each blowing hole is 2mm, the hole distance of the same row of blowing holes is 300mm, two adjacent rows of blowing holes are staggered by 150mm, the distance between each compressed air pipe and the back-up roll is kept at 50mm, one end of each compressed air pipe is connected with an electromagnetic valve, the side surface of the supporting roller is also provided with a temperature sensor which is communicated with a power supply of the electromagnetic valve through a lead, when the temperature sensor senses that the temperature reaches 200 ℃, the power supply of the electromagnetic valve is switched on, so that the compressed air pipe can be cooled down in an air cooling mode to the supporting roller.

Description

Device for rapidly cooling bearing of supporting roller of hot straightening machine

Technical Field

The utility model relates to a be used for quick refrigerated device of hot straightener backing roll bearing.

Background

In order to eliminate various wave-shaped defects generated in each production process of a medium plate production line, a hot straightening machine is arranged behind a rapid cooling system (ACC system) and is used for straightening a steel plate after rolling and ACC cooling so as to eliminate the unevenness of the steel plate. One 1500-ton hot straightening machine is arranged on the medium plate factory of eight iron and steel companies Limited in Xinjiang Baoku group on line. The hot straightening method is mainly used for carrying out hot straightening on medium plates of various specifications rolled by a 3.3M finishing mill at the temperature of 500-800 ℃, so that the straightness and the drift curvature of the steel plate can reach the national standard or the user requirements. The medium plate hot straightening machine can straighten a thick plate with the thickness of about 70mm at present, but the straightening temperature is relatively high, and the temperature born by a roller system reaches less than or equal to 200 ℃. Because only the working roll has water cooling in the roll system, the support roll bearing has no effective cooling mode, and the straightening roll system bears high temperature for a long time in the working process to cause the failure loss of lubricating grease replenished in the roll system bearing seat, thereby generating roll system lubrication fault and causing production interruption. The hot straightening machine roller system is a roller system for straightening a steel plate, wherein the roller system comprises nine working rollers and two guide rollers, a supporting roller is arranged behind the working rollers, the supporting roller bearing which is most easily damaged is locked due to oil shortage, the currently used oil is high-temperature resistant oil, the currently best oil in China is used, the working requirement of the roller system cannot be met, and the oil shortage of the supporting roller is caused to cause the bearing locking. The roller system is disassembled, the bearing is observed to be not obviously abraded, the bearing is lack of oil and locked due to the lack of lubricating grease in a bearing seat of a supporting roller, the reason is analyzed, mainly, the working environment temperature of the roller system of the hot straightening machine is too high, the working temperature range of common 2# lithium-based grease is 120 ℃ under normal conditions, the working condition temperature of the hot straightening machine is about 200 ℃, common lubricating grease cannot meet the requirement, under normal conditions, the lubricating grease added into the bearing of the supporting roller is changed into a nearly liquid state under a high temperature state, oil in a natural bearing can be quickly lost, the lubricating grease cannot be stored, so that the lubricating oil in the offline time is seriously lost, the dry grinding between the bearing and a bearing framework is caused, and the supporting roller is damaged. On site, special high-temperature lubricating grease is tried to be adopted, the service temperature can reach 180 ℃, the requirement of on-site use can be met, but the price is high, and the cost pressure is caused on the site. If the working condition temperature of the on-site roller system can be kept within the normal working temperature of common lubricating grease by changing the on-site working condition temperature, the normal running of the lubricating grease at the allowable temperature can be achieved, the phenomenon of bearing locking of the roller system is avoided, and the service life of the roller system of the hot straightening machine on line is prolonged. The compressed air can be used as the coolant for cooling the supporting roller system, so that the cost can be reduced and the efficiency can be greatly improved.

Disclosure of Invention

An object of the utility model is to provide a be used for quick refrigerated device of hot straightener backing roll bearing, through transforming the former roller system, install quick cooling device additional and realize that the straightening roller is quick refrigerated purpose, reduce the bearing and produce the phenomenon of locking because of lacking oil.

The device for rapidly cooling the bearing of the supporting roll of the hot straightening machine comprises a plurality of compressed air pipes horizontally arranged on one side of the supporting roll of the straightening machine, the length of each compressed air pipe is 4000mm, the pipe diameter of each compressed air pipe is 15mm, two rows of blowing holes are arranged on a pipe body of each compressed air pipe at an included angle of 90 degrees, the hole pitch of each blowing hole is 2mm, the hole pitch of the same row of blowing holes is 300mm, two adjacent rows of blowing holes are staggered by 150mm, the distance between each compressed air pipe and the supporting roll is 50mm, one end of each compressed air pipe is connected with an electromagnetic valve, the side surface of the supporting roller is also provided with a temperature sensor which is communicated with a power supply of the electromagnetic valve through a lead, when the temperature sensor senses that the temperature reaches 200 ℃, the power supply of the electromagnetic valve is switched on, so that the compressed air pipe can be cooled down in an air cooling mode to the supporting roller.

The traditional simple natural environment air cooling mode is changed into controllable compressed air cooling, so that the working condition temperature is not high when the whole roller system operates, the temperature of a bearing in a supporting roller is kept below 100 ℃, the lubricating grease is not reduced in function, namely, the bearing can not store oil for a long time, the lubricating effect is reduced, and the phenomenon of locking of a bearing seat is avoided. The increased air cooling not only reduces the temperature of the supporting roll, but also further reduces the working temperature of the working roll, reduces the phenomenon that the working roll of the hot straightening machine is bonded with steel, reduces the grinding times of the working roll of the hot straightening machine, reduces the grinding amount of the working roll, reduces the thickness consumption of the surface quenching layer of the hot straightening working roll, and prolongs the service life of the working roll. Still subsidiary effect after adopting compressed air cooling supporting roller bearing: the scale between the roller system is blown away by the blown high-speed airflow, so that the scale is prevented from entering the bearing block, the working condition environment of the roller system of the straightening machine is improved, and the service life of the roller system is prolonged. And simultaneously, the utility model provides high for the backing roll bearing life, improve the aligning volume to 6 ten thousand tons by original 4 ten thousand tons. The yield is improved, and the spare part purchasing cost is reduced by 10 ten thousand yuan per month. The time for stopping and grinding the working roll of the hot straightening machine due to steel dipping is reduced by 8 h/pair. The economic benefit is very outstanding.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a schematic view of the compressed air tube of the present invention;

fig. 3 is a side sectional view of the compressed air pipe of the present invention.

Detailed Description

The utility model provides a device for quick cooling of hot straightener backing roll bearing, as shown in figure 1, 2, 3, arrange compressed air pipe 1 in 4 one sides of straightener backing roll including a plurality of levels, compressed air pipe 1's length is 4000mm, the pipe diameter is 15mm, all be 90 degrees contained angles on every compressed air pipe 1's the body and set up two rows of purge holes 2, 3, every purge hole pitch is 2mm, the hole interval of same row of purge hole is 300mm, two adjacent rows of purge hole dislocation 150mm are arranged. Keep 50mm interval between compressed air pipe 1 and the backing roll 4, every compressed air pipe 1's one end all links to each other with an solenoid valve 5, still is setting up temperature sensor 6 in the backing roll side, and temperature sensor 6 is linked together through the power of wire with solenoid valve 5, and when temperature sensor 6 perception reached 200 degrees, the switch-on solenoid valve 5 power made compressed air pipe 1 can carry out the air cooling to backing roll 4. When the temperature does not reach the set control temperature, the compressed air pipe 1 and the electromagnetic valve 5 do not work, so that the influence of high-frequency squeal generated during high-pressure air purging on field workers is reduced.

Claims (1)

1. The utility model provides a device for quick cooling of hot straightener backing roll bearing, includes that a plurality of levels arrange the compressed air pipe in straightener backing roll one side, characterized by: compressed air pipe's length is 4000mm, the pipe diameter is 15mm, all be 90 degrees contained angles on every compressed air pipe's the body and setting up two rows of blowing holes, every blowing hole pitch is 2mm, the hole interval in same row blowing hole is 300mm, two adjacent rows of blowing hole dislocation 150mm are arranged, keep 50mm interval between compressed air pipe and the backing roll, every compressed air pipe's one end all links to each other with a solenoid valve, still setting up temperature sensor in the backing roll side, temperature sensor passes through the wire and is linked together with the power of solenoid valve, when temperature sensor perception temperature reached 200 degrees, switch-on solenoid valve power makes compressed air pipe can carry out the air cooling to the backing roll.

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