SU730397A1 - Apparatus for a supplying technological lubricant - Google Patents

Description

The invention relates to rolling production, specifically to devices for supplying lubricant to the rolls of hot rolling mills and improves the design of technological lubrication systems.

A device for supplying lubricant logical technological ⁵ rolls on the hot rolling mill, consisting of arteries supplying the cooling water and the oil pressure pump supplying the mixture to the feed and pressure loopback magistra- lyami ^10, pressure regulators and oil mixture and feeding the mixture into the injector manifold cooling water ^ 1].

The device provides automatic production of the mixture due to the pressure drop in the looped line of the mixture pump, allows to increase the rolling process with process lubricants and has great reliability. 'However, the known device does not automatically adjust the amount of lubricant supplied when the pressure in the cooling water line changes.

During hot rolling of strips of various profiles, the rolling rolls are heated to various temperatures. This requires a significant change in the amount of cooling water supplied to them, the flow rate of which is regulated on the mills by changing its pressure. On modern broadband: hot rolling mills, the cooling water pressure can range from

1.5 atm to 10 atm.

The flow rate of a process lubricant in the form of a water-oil mixture when it is supplied through a cooling roll collector® is determined by the formula

39.6 ·, ^A /uac.♦ where is the flow coefficient equal to 0.35 for water;

with | - diameter of the nozzle supplying lubricant;

Pg - lubricant pressure and water pressure in the cooling pipe, respectively.

Thus, if the lubricant pressure P _{cm is} constant, and the water pressure P _? fluctuates from 1.5 to 10 atm, this will lead to a fluctuation in the amount of lubricant supplied. As a result, the thickness of the lubricant layer on the rolls will also fluctuate, which will cause a change in the efficiency of the rolling process with lubricant. Moreover, the most time-consuming during rolling profiles, when applied to the rolls ¹⁰ bol- Choe amount of cooling water at high pressure, the supply amount of lubricant is minimal and the efficiency of its application is low.

The purpose of the invention is automatic ¹⁵ control of the amount of lubricant supplied.

The goal is achieved by the fact that in the known device for supplying technological lubricant to the rolls of a hot rolling mill, 4 consisting of lines of cooling water and oil under pressure, a pump for supplying a mixture with a looped supply and pressure lines, regulators of oil and mixture pressure and nozzles for supplying the mixture to the line cooling water, according to the invention, the cooling water line is connected to the oil pressure regulator and to the supply magazZ strap of the mixture feed pump.

The drawing shows a diagram of the proposal. wife technological lubricant supply device.

3!

The device contains a supply line for water 1 and oil 2 under pressure, a check valve 3 and a dispenser 4 are installed in the latter. The pressure in the pressure supply line is created by the oil pump 5, _{4 (} having a return line 6 with an oil pressure regulator 7, consisting of a diaphragm 8, valve 9 with stock and springs 10,

The water supply line 1 and oil 2 ₄ are connected by a supply line 11 to the inlet of the mixture supply pump 12.

The pressure line 13 of the mixture pump 12 with the shut-off valve 14 is ringed with its supply line 11 through the pressure regulator 15 of the mixture. The nozzles 16 for supplying the mixture to the cooling water line 17 are connected to the looped line of the pump 12. Lubrication is applied to the rolls 18 after the cooling collectors ^- 19 together with cooling water.

The device operates as follows.

At constant pressure in the cooling water line 17, oil and water are supplied through lines 1 and 2 under the same pressure, for example 3 atm. When the shut-off valve 14 of the pressure pipe 13 is closed, oil and water enter the piping system of the pump 12 until they are completely filled. In this case, the pressure in the pressure line 13 is determined by the pressure regulator 15 of the mixture, and in the line 11 a certain pressure is also set, but not lower than the pressure in the supply lines 1 and 2, i.e. not lower than 3 atm. The oil-water mixture is continuously circulated in the looped line of the pump 12, mixing thoroughly. After receiving a signal for supplying the mixture, the shut-off valve 14 opens and the lubricant mixture is fed to the rolls. As a result, the pressure in the line 11 drops, which leads to the flow of oil and water from the lines 1 and 2 to the line 11. The amount of oil and water received corresponds to the amount of the mixture expended on the lubrication of the rolls. Thus, the device allows you to automatically prepare and serve a water-oil mixture due to the presence of a pressure differential in the looped line of the pump 12 of the mixture.

The device automatically adjusts the amount of the supplied lubricant mixture when the pressure changes in the cooling water line 17, through which water is supplied to the rolls 18 and along the line 1 to the supply line 11 to the input of the mixture supply pump 12. At the same time, water is supplied to the pressure regulator 7 installed on the return line 6 of the oil pump 5. The diaphragm 8 of the pressure regulator bends, which, in turn, will cause the valve 9 of the regulator 7 to be closed. 7. The amount of supplied lubricant in the return line 2 decreases. This will cause an increase in the amount of lubricant supplied in the supply line 11. As a result, with an increase in the pressure of the cooling water, the supply of the lubricant mixture to the rolls 18 will proportionally increase. emogo device allows to adjust the feed amount by connecting the pump supply line feeding the mixture to the pipeline of the cooling water, which is connected to the oil supply pressure regulator. The ego optimizes the consumption of process lubricant, increases its efficiency by reducing the overburden parameter® and reducing the wear of the rolls when rolling thin and wide strips that require a significant amount of cooling water under high pressure to cool the rolls. When rolling strips that require a small amount of lead to cool the rolls, the risk of slipping of the rolls due to excess lubrication on the rolls is eliminated.

Claims (2)

Take the invention to rolling production, specifically to devices for supplying lubricant to the rolls of hot rolling mills, and improve the design of technological lubrication systems. A device for supplying process lubricant to the rolls of a hot rolling mill is known, consisting of cooling water and pressure oil supply lines, a mixture feed pump with looped feed and pressure lines, oil pressure regulators and the mixture and injection nozzles into the cooling water line Ij. The device provides for the automatic production of the mixture due to the pressure drop in the looped line of the pump of the mixture, allows T1 to improve the rolling process with process lubricants and has greater reliability in operation. However, the prior art device does not allow the amount of lubricant to be automatically controlled when the pressure in the cooling water line varies. During hot rolling of a profile, the rolls are heated to different temperatures. This requires a significant change in the amount of cooling water supplied to them, the flow rate of the modulator is regulated at the mills by changing its pressure. In modern broadband rolling mills, the cooling water pressure varies from 1.5 atm to 10 atm. The flow rate of the process lubricant in the form of a water-oil mixture Tphi and its delivery through the cooling manifold to the roll is determined by the formula C -) L 39.6, where it is the flow coefficient equal to 0.35 for the Veda; a - diameter podak dehkhs lubrication nozzle; 5, P is the lubricant pressure and water pressure in the cooling pipeline, respectively. Thus, if the pressure of the lubricant P is constant, and the water pressure Pp varies from 1.5 to 10 atm, this will also result in a fluctuation of the amount of lubricant fed to the rolls. As a result, the thickness of the lubricant layer on the rolls will also vary, which will cause a change in the efficiency of the rolling process with lubricant. Moreover, when rolling the most labor-intensive profiles, when a large amount of high-pressure cooling is applied to the rolls, the amount of grease supplied will be minimal and the efficiency of its application is low. The purpose of the invention is to automatically control the amount of lubrication, the purpose of which is achieved by the fact that a device for supplying technological lubricant to the rolls of a hot rolling mill is known in the apparatus, which consists of lines for cooling water and oil under pressure, a mixture feed pump with a circulating supply line and a pressure line According to the invention, the cooling water line is connected to the oil pressure regulator and to the supply line suction feed mixture. The drawing shows a diagram of the proposed lubricant supply device. The device contains;:; it and the water supply line 1 and the oil 2 under pressure, the latter has a check valve 3 and a metering device 4. The pressure in the oil pressure line is created by the oil pump 5, having a return line 6 with the oil pressure regulator 7, consisting of diaphragm 8, valve 9 with stem and springs 1O, Water supply lines 1 and oil 2 are connected by a supply line 11 to the inlet of the mixture supply pump 12. The delivery line 13 of the mixture pump 12 with the shut-off valve 14 is looped to its supply line 11 through the pressure regulator 15 of the mixture. The forks 16 for feeding the mixture to the main line 17 are cooled with water and connected to the looped main line of the pump 12. The lubricant is applied to the rollers 18 of the cooling collectors - 19 together with the cooling water. The device works as follows. At a constant pressure in the line 17 of the chilled water, oil and water are fed through line 1 and 2 under the same pressure, for example, 3 atm. When the shut-off valve 14 of the pressure line 13 is closed, the oil and water enters the pipeline system of the pump 12 until they are completely filled. In this case, the pressure in the pressure line 13 is determined by self-injection of the pressure regulator 15 of the mixture, and a certain pressure is also established in line 11, but not pressure in the supply lines x 1 and 2, i.e. not below 3 atm. Water oil to the mixture is continuously circulated in the looped line of the pump 12, carefully moving. After receiving the signal to supply the mixture, the shut-off valve 14 opens and the lubricant mixture is fed to the rolls. As a result, the pressure in line 11 drops, which leads to the flow of oil and water from lines 1 and 2 into line 11. The amount of oil and water after the injection corresponds to the amount of mixture consumed for the lubrication of the rolls. Thus, the device allows the water-oil mixture to be automatically prepared and supplied due to the presence of a pressure drop in the filled pump line 12 of the mixture. The device automatically regulates the amount of lubricant supplied when the pressure in the cooling water line 17 is changed, through which water is supplied to the rollers 18 and through line 1 to the supply lines of the line 11 to the inlet of the mixture feed pump 12. At the same time, water is supplied to the pressure regulator 7 installed on the return line 6 of the oil pump 5. Dia (} Chinagma 8 of the pressure regulator when the pressure rises to cool: it will deflect water, which in turn will cause the valve to cover 9 (regulator 7). There is a decrease in the amount of lubricant supplied in the return line 2. This will cause an increase in the amount of lubricant supplied to supply line 11. As a result, with increasing cooling water pressure, the supply of lubricant to rolls 18 will increase proportionally. Using the proposed device will allow you to adjust the amount of mixture supplied by connecting the supply line of the mixture feed pump to the cooling water supply line, which is connected to the oil pressure regulator. This optimizes the flow rate of the process, increases its efficiency by reducing the beast strength setting® and reducing roll wear when rolling thin and wide strips that require cooling of the rolls of supply to reduce the amount of skladakchpey water by large amounts. As a result of the Veda, the danger of the Walkse slipping due to excess lubrication on the rolls is eliminated. Claims of invention The apparatus for supplying technological lubricant to the rolls of a hot rolling mill. consisting of a cooling water and pressure oil trawl, a mixture feed pump with a flow control and pressure small, regulators press oil in the mixture and the supply unit for supplying the mixture to the cooling water main, characterized in that automatic adjustment of the lubricant flow rate, the cooling water line is connected to the oil pressure regulator and to the feed line of the mixture feed pump. Sources of information taken into account in the examination 1. USSR author's certificate in application fe 2486899 / О2, cl. B 21 B 27/10, 1977. /eight