KR100617255B1 - Roll neck lubrication and sealing device for finishing mill - Google Patents

Abstract

The present invention relates to a roll neck lubrication and sealing device for a finishing mill installed in a steel mill, comprising: a first supply passage penetrating toward a side from an outer peripheral surface of an end of a rolling mill case forming a roll neck portion of an intermediate sand mill or a finishing mill; An oil seal sleeve fitted to the roll shaft and then in close contact with the rolling mill case; A retaining plate having a second supply passage and a bypass passage fixed to the rolling mill case and inserted into the same form while preventing the oil seal sleeve from being separated, and communicating with the first supply passage; A seal plate fixed to the rolling mill case while in close contact with the retaining plate; A labyrinth ring covering the seal plate, the labyrinth ring being disposed at intervals inside the side surface of the rolling roll to form a discharge passage, fixed to the retaining plate, and having a third supply passage communicating with the bypass passage; It is fitted between the sleeve for the oil seal and the retaining plate, one end is in close contact with the retaining plate and the labyrinth ring, the other end is in close contact with the sleeve for the oil seal and the first supply passage is arranged in the center of the stack Oil seal; It comprises an oil and air supply connected to the first supply passage and the connection hose.

The present invention can seal the roll neck portion of the medium-phase rolling mill or finishing mill of the wire rod plant in a stable manner to prevent the internal penetration of foreign substances, and to maximize the lubricity of the oil seal to extend the service life of the equipment. It reduces the time frame and helps to maximize productivity.

Wire Rod Factory, Mid-Ground Mill, Finishing Mill, Oil Seal, Roll Neck

Description

ROLL NECK LUBRICATING AND SEALING APPARATUS OF FINISHING MILL}

1 is an exemplary plan view of a finishing mill for wire rod according to the present invention,

2 is a cross-sectional view taken along the line A-A of FIG.

3 is an exemplary exploded perspective view showing a process of assembling the apparatus according to the invention the roll neck portion;

Figure 4 is a cross-sectional view of the device according to the invention coupled to the roll neck portion;

5 is an exploded perspective view showing an oil-air mixer in the apparatus according to the present invention;

6 is an exploded cross-sectional view of FIG. 5;

7 and 8 are cross-sectional views showing the operating state of FIG.

9 is a cross-sectional view of the main portion showing an operating state of the apparatus according to the present invention.

♧ description of the symbols for the main parts of the drawing ♧

100 .... Three rolling mill 110 .... Rolling roll

120 ... roll shaft 200 ... roll neck

210..oil seal sleeve 220..Retaining plate

230 .... Seal Plate 240a, b .... Oil Seal

250 ... Labyrinth Ring 300 ... Rolling Mill Case

400 .... mixer 410 .... installer

420 .... Mixed liquid supply port 430 .... Air supply port

440 ... oil supply 460

470 ... Splash 480 ... Spring

490 ... Spring cover AP ... air pump

OP .... oil pump

The present invention relates to a roll neck lubrication and sealing device of a finishing mill installed in a steel mill, and more particularly, a coolant or the like penetrates while maintaining the airtightness of the finishing mill roll neck portion, which is difficult to maintain due to the roll assembly protruding outside the casing. The present invention relates to a roll neck lubrication and sealing device for a finishing mill, which maximizes its service life.

In general, the roll neck portion of the intermediate sand rolling mill and the finishing mill of the steel mill wire rod factory is provided with an oil seal for sealing.

This is to block the inflow of foreign matter from the outside because the roll assembly shaft of the roll neck portion is projected out of the case of the rolling mill.

These oil seals usually allow rotation speeds of up to 32 m / s per hour for shaft diameters of 110 m / m and are generally used at 5000 rpm or less.

However, since the medium-sized rolling mill and the finishing mill of the wire rod factory rotate at a high speed of 75 ~ 110m / s and the rotational speed of the roll shaft is 5000 ~ 18000rpm, the oil seal that is in contact with the rotation is used for the main speed and allowable rotation speed. The heat generation, hardening, and abrasion occur quickly, which makes oil seals impossible to leak, which causes the external penetration of foreign substances, causing damage to the rolling mill bearings installed for bearing water, and acting as a major problem to drastically reduce productivity. have.

That is, the life of the oil seal is shortened, and the number of replacements is increased, so that the equipment operation must be stopped at every replacement, which leads to a long down time, which greatly reduces the productivity of the wire rod product.

The present invention has been made in view of the above-mentioned problems of the prior art, and has been created to solve this problem, and improves the sealing structure of the roll neck portion installed in the intermediate sand rolling mill or the finishing mill of the wire rod factory to seal the oil completely and simultaneously. Its main purpose is to provide a roll-neck lubrication and sealing device for finishing mills that extends the life of the oil seal and reduces downtime of the equipment by activating the lubrication function by simultaneously supplying air and air.

In order to achieve the above technical problem, the present invention includes: a first supply passage penetrating toward the side from the outer peripheral surface of the end of the rolling mill case forming the roll neck portion of the intermediate sand mill or the finishing mill; An oil seal sleeve fitted to the roll shaft and then in close contact with the rolling mill case; A retaining plate having a second supply passage and a bypass passage fixed to the rolling mill case and inserted into the same form while preventing the oil seal sleeve from being separated, and communicating with the first supply passage; A seal plate fixed to the rolling mill case while in close contact with the retaining plate; A labyrinth ring covering the seal plate, the labyrinth ring being disposed at intervals inside the side surface of the rolling roll to form a discharge passage, fixed to the retaining plate, and having a third supply passage communicating with the bypass passage; It is fitted between the sleeve for the oil seal and the retaining plate, one end is in close contact with the retaining plate and the labyrinth ring, the other end is in close contact with the sleeve for the oil seal and the first supply passage is arranged in the center of the stack Oil seal; It is a technical feature to provide a roll neck lubrication and sealing device of a finishing mill comprising an oil and air supply connected to the first supply passage and the connection hose.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

1 is an exemplary plan view of a finishing mill for a wire rod according to the present invention, Figure 2 is a cross-sectional view taken along line AA of Figure 1, Figure 3 is an exploded perspective view showing a process of assembling the device according to the invention in the roll neck portion 4 is an exploded cross-sectional view of an apparatus according to the present invention coupled to a roll neck portion, FIG. 5 is an exemplary exploded perspective view showing an oil-air mixer in the apparatus according to the present invention, and FIG. 6 is an exploded cross-sectional view of FIG. 7 and 8 are cross-sectional views showing the operating state of Figure 5, Figure 9 is a cross-sectional view of the main portion showing the operating state of the apparatus according to the present invention.

As shown in Figs. 1 to 4, the apparatus of the present invention is mounted to the roll neck portion of the intermediate sand mill or the finishing mill for wire rod.

For example, in FIG. 1, the finishing mill 100 is illustrated in a planar state.

As shown, the rolling mill W passes through the center of the finishing mill 100 and is disposed to pass, and the finishing mill is formed to be engaged to roll the rolling material W for wire. Inside the 100, a pair of rolling rolls 110 are installed.

And, both ends of the rolling roll 110 is provided with a roll neck portion 200 for performing a protective function such as cooling, airtight while holding the roll shaft 120 as shown in FIG.

3 and 4, the roll neck portion 200 has an oil seal sleeve 210 and a retaining plate at both ends of the rolling mill case 300 having the roll shaft 120 embedded therein. 220), the seal plate (Seal Plate) 230, Labyrinth Ring (Labylinth Ring) 250 is assembled and fixed in turn.

The assembly method, as shown in Figure 3, the oil seal sleeve 210 is fitted to both ends of the roll shaft 120 in close contact with the end surface of the rolling mill case 300, the roll shaft 120 and the rolling mill case 300 The journal sleeve 130 and the bearing (B) is installed between the primary seal, and the retaining plate 220 is fixed to the rolling mill case 300 including the oil seal sleeve 210 to the top thereof is assembled The oil seal 240a is inserted into the retaining plate 220 while being in close contact with the oil seal sleeve 210, and the seal is in close contact with the oil seal 240a and the retaining plate 220. After the plate 230 is disposed and bolted to the rolling mill case 300, another oil seal 240b is inserted into the upper portion thereof to be in close contact with the oil seal sleeve 210, and the labyrinth ring 250 is finally Bolted to the retaining plate 220 Zorro takes place.

At this time, a pair of oil seals (240a, b) in close contact with the oil seal sleeve 210 with the seal plate 230 therebetween is disposed.

In addition, a first supply flow path L1 is formed through a portion of both ends of the rolling mill case 300 toward the end surface perpendicular to the outer peripheral surface thereof.

In addition, a second supply passage L2 communicating with the first supply passage L1 is formed inside one side of the retaining plate 220.

Here, the second supply passage (L2) is a portion of the length is branched to form a bypass passage (L2 '), the portion that is not bypassed is arranged to be supplied to the central portion of the oil seal (240a, b), bypass The flow path L2 'is connected to the third supply flow path L3, which will be described later.

The bypass flow path L2 ′ is formed to be directly connected to the third supply flow path L3 because the excessive pressure is generated in the second supply flow path L2 (supply pressure of air + oil). It is to solve.

In addition, the third supply passage (L3) is formed in place of the labyrinth ring 250, the space formed between this and the rolling roll 110 after the assembly of the labyrinth ring 250 is discharge passage (L4) The discharge passage (L4) is configured to communicate with the space in which the third supply passage (L3) and the oil seal (240a, b) is installed.

Therefore, the mixture of air and oil supplied through the first supply passage L1 is discharged to the discharge passage L4 through the second supply passage L2, the bypass passage L2 ', and the third supply passage L3. The process is repeated repeatedly.

Thereafter, the discharged air and oil mixture is collected and recycled or treated separately.

On the other hand, the apparatus (or feeder) for mixing air and oil to supply to the lubrication means, as shown in Figures 5 to 8, the square mixer 400 of the size corresponding to the number of rolling rolls 110 of the rolling mill is approximately It is provided, a plurality of installation holes 410 is formed through the long side of the mixer 400 is formed in step by step inside the multi-stage at a predetermined interval along the long side length.

In addition, one surface orthogonal to the installation hole 410, the upper surface shown in Fig. 5 is formed with a corresponding number of the mixed solution supply port 420 in communication with the installation hole 410, the installation hole 410 and An air supply port 430 and an oil supply port 440 communicating with the installation holes 410 are formed on one surface that is orthogonal to the mixed liquid supply port 420, that is, one short side.

The air supply port 430 and the oil supply port 440 is connected to the air pump (AP) and the oil pump (OP), respectively, as shown in the example of Figure 9, in particular in the case of the oil pump (OP) Timer (Timer) It is desirable to be equipped to operate periodically by the control.

And, the interior of the mixer 400 is composed of a flow path as shown in Figure 6, for example, the oil connection oil flows in communication by bypassing a point past the mixture liquid supply port 420 from a portion adjacent to one end of the installation hole 410 412 is formed, and an annular communication groove 422 is formed at a portion where the mixed liquid supply hole 420 and the installation hole 410 contact each other, and also an air supply hole 430 and the mixed liquid supply hole 420. Is connected via the communication groove 422, the other part of the air supply port 430 is in air communication with one end of the installation hole 410 end side of the mixer 400 opposite to the oil connection passage 412 A connection passage 432 is formed.

At this time, the spool 460 is inserted into the end of the installation hole 410, the oil connection passage 412 is formed, the spool 460 is sealed by the spool cover 470, the air connection is the opposite end A spring 480 is inserted into an end of the side of the installation hole 410 in which the flow path 432 is formed, and the spring 480 is sealed by the spring cover 490.

Here, the spool 460 is inserted in the form that the rear end is caught in the first step surface of the installation hole 410 is formed in a multi-stage step, the inserted inner end is inserted into a predetermined depth to form a spring insertion groove 462 On the outer circumferential surface of the spool 460, first and second oil grooves 464 and 466 are formed in an annular shape at intervals from each other.

At this time, the interval between the first and second oil grooves 464 and 466 is preferably formed to correspond to the interval between the end of the oil connection passage 412 connected to the communication groove 422 and the installation hole 410 therethrough.

In addition, an oil path passage 472 is formed in the outer peripheral surface of the inner end of the spool cover 470 to communicate with the oil connection passage 412 and to communicate with the oil supply port 440. A pressurized hole 474 communicating with the pass passage 472 is formed through the hole.

Further, a protrusion 492 is formed at the center of the inner surface of the spring cover 490, and one end of the spring 480 is fitted to the protrusion 492 to be engaged.

The operation relationship of the present invention made of such a configuration will be described with reference to FIGS.

First, the air pump (AP) is always operated to be supplied to the air supply port 430 with a pressure of approximately 2 ~ 3kg / ㎠.

At this time, the supplied air is supplied to the air supply port 430, the mixed liquid supply port 420, the connection hose (H), the first and second supply passages (L1, 2), oil seals (240a, b) and the third and fourth supply It is supplied and discharged via the flow paths L3 and 4.

In addition, the oil pump OP controlled by the timer sends the pumped oil to the first oil supply port 440, and the oil introduced into the oil supply port 440 is an oil pass formed in the splat cover 470. It is supplied to the passage 472.

The supplied oil is partially moved through the oil connection passage 412, and the other portion presses the tip of the spool 460 via the pressing hole 474.

Since the oil moved to the oil connection passage 412 does not proceed any more, when the oil connection passage 412 is filled with oil, the oil introduced into the oil path passage 472 is only spooled through the pressure hole 474. 460 is filled in the chamber (C) while moving to the chamber (C) shown in FIG.

When the oil introduced into the chamber C is filled to a predetermined amount or more, the pressing force by the oil is greater than the tension of the spring 480, and thus the spool 460 compresses the spring 480 while the spring cover 490 is pressed. Push towards the side.

This situation is well illustrated in FIG. 8.

When the spool 460 is pushed back, the oil-filled first oil groove 464 coincides with the communication groove 422 while being exposed to the chamber C. At the same time, the first oil groove 466 is the oil connecting oil. And (412).

Accordingly, the oil in the first oil groove 466 is automatically supplied to the oil seals 240a and b through the mixed liquid supply port 420 together with the air supplied thereto, and the oil connection flow path is formed in the second oil groove 466. The oil supplied via 412 remains in a remaining state.

Subsequently, when the operation of the oil pump OP is stopped, the pressing force caused by the oil is released, and thus the spool 460 is automatically returned to its original position by the return force of the spring 480. In this case, the second oil groove 466 Since the communication groove 422 is matched with the air of a predetermined pressure supplied from the air pump AP, the oil remaining in the second oil groove 466 is automatically supplied to the oil seals 240a and b.

That is, two oil supply occurs through the reciprocating motion of the spool 460, and at this time, the oil seals 240a and b are supplied to the oil seals 240a and b in a state in which air and oil are properly mixed. This improves the service life is extended, thereby increasing the sealing efficiency is suppressed the internal penetration of the foreign matter.

As described in detail above, the present invention can seal the roll neck portion of the medium-phase rolling mill or the finishing mill of the wire rod plant in a stable manner to prevent the internal penetration of foreign substances, and to maximize the lubricity of the oil seal to extend its service life. It can be used to reduce the downtime of the equipment, which helps to maximize productivity.

Claims (4)

A first supply passage penetrating toward the side from the outer peripheral surface of the end of the rolling mill case forming the roll neck portion of the intermediate sand mill or the finishing mill; An oil seal sleeve fitted to the roll shaft and then in close contact with the rolling mill case; A retaining plate having a second supply passage and a bypass passage fixed to the rolling mill case and inserted into the same form while preventing the oil seal sleeve from being separated, and communicating with the first supply passage; A seal plate fixed to the rolling mill case while in close contact with the retaining plate;  A labyrinth ring covering the seal plate, the labyrinth ring being disposed at intervals inside the side surface of the rolling roll to form a discharge passage, fixed to the retaining plate, and having a third supply passage communicating with the bypass passage; It is fitted between the sleeve for the oil seal and the retaining plate, one end is in close contact with the retaining plate and the labyrinth ring, the other end is in close contact with the sleeve for the oil seal and the first supply passage is arranged in the center of the stack Oil seal; Roll neck lubrication and sealing device of the finishing mill comprising an oil and air supply connected to the first supply passage and the connection hose. The method of claim 1, wherein the oil and air supply unit, A mixer having a rectangular body; A plurality of installation holes formed by penetrating the mixer back and forth; A supply port formed in a corresponding number on an upper surface perpendicular to the installation hole and connected to the connection hose; An air supply port and an oil supply port formed in communication with the installation hole at intervals on one side of the mixer orthogonal to the installation hole and the supply port and connected to the air pump and the oil pump, respectively; A spool fitted into one end of an installation hole adjacent to the oil supply hole and having first and second oil grooves formed at intervals from each other on an outer circumferential surface thereof; A spool cover which covers the spool and seals the installation hole and at the same time the front end has an oil path passage communicating with the oil supply port and a pressurizing hole communicating with the spool side; A spring fitted into the spring insertion hole of the spool; A spring cover having a protrusion for fixing the spring while sealing the installation hole opposite the spool cover; Roll neck lubrication and sealing of the finishing mill is in communication with the oil pass passage and comprises an oil connection passage formed in communication with the inner hole of the mixer having a distance as much as the first and second oil groove from the supply port Device. The site where the supply port is in contact with the installation hole, Roll neck lubrication and sealing device of the filament rolling mill, characterized in that the communication groove is expanded to a certain size along the inner diameter of the installation hole. The method of claim 2, wherein the air supply port, Roll neck lubrication and sealing device of the finishing mill is connected to the spring cover side installation hole end is provided with an air connection passage having an air buffer function.

Images