CN109926450B - Oil-water separation's three-high mill - Google Patents

Abstract

The invention discloses a three-roller mill for oil-water separation, which cancels the traditional small memorial archways and realizes hole pattern adjustment by utilizing the principle of eccentric adjustment; the synchronous gear realizes linkage between the upper worm and the lower worm, and pass adjustment can be realized only by adjusting one of the worms, so that the on-line adjustment of the pass of the roller can be realized, and the production efficiency is greatly improved; the original outer spacer ring and inner spacer ring are replaced by a sealing sleeve with a longer length, and the outer circular surface at one end of the sealing sleeve replaces a roller to be in contact with the framework type rubber seal III; and a framework type rubber oil seal arranged between the bearing seat sleeve and the sealing sleeve further enhances the isolation effect between the lubricating oil and the emulsion.

Description

Oil-water separation's three-high mill

Technical Field

The invention relates to a rolling mill, in particular to a three-high rolling mill for oil-water separation, belonging to the industry of electrical metallurgy machinery.

Background

For decades, in the electrical and metallurgical machinery industry, the rolling mill of the continuous casting and rolling production line is used by mixing a three-roll mill and a two-roll mill. The three-high mill is divided into an upper drive three-high mill and a lower drive three-high mill, wherein fig. 1 and 2 are the upper drive three-high mill, and fig. 3 is the lower drive three-high mill.

Now, the above three-roll transmission mill is taken as an example to illustrate the lubrication and cooling conditions of the lubricating oil and the emulsion in the prior art. As shown in fig. 1 and 2, the serial number 1 is a small memorial archway, and 1 piece is arranged on the left and the right; the serial number 2 is an O-shaped rubber sealing ring; the serial number 3 is a rubber block; number 4 is the major axis (i.e., power input shaft); the serial number 5 is a frame (because of two small memorial archway holes, the frame is called as a frame); the serial number 6 is a short shaft, and 1 piece is arranged on the left and the right; the serial number 7 is 4 pieces of bevel gears which are respectively arranged at the two ends of the long shaft 4 and the corresponding ends of the two short shafts 6; the serial number 8 is 4O-shaped rubber sealing strips, and 2 sealing strips are arranged on each small housing 1; the serial number 9 is a tapered roller bearing, 6 parts are provided, and 2 parts are respectively arranged on the long shaft 4 and the two short shafts 6; the serial number 10 is an outer space ring which is sleeved on the long shaft 4 and is positioned between the bevel gear 7 and the tapered roller bearing 9; the serial number 11 is a bearing sleeve which is sleeved outside the tapered roller bearing 9; the number 12 is an inner ring spacer, a roller 15 is arranged between two tapered roller bearings 9 on each shaft, the end heads of the corresponding two bearing seat sleeves 11 are embedded in the roller 15, and framework rubber oil seals 13 and 14 are respectively arranged between the inner and outer surfaces of the corresponding two bearing seat sleeves and the roller 15; the three rollers 15 on the three shafts are distributed in a 120-degree circle center angle, the three rollers 15 form an inverted Y shape, and an emulsion cavity formed between the three rollers 15 and the rack 5 forms an inverted Y-shaped emulsion cavity, so that the three-roller transmission rolling mill is also called an inverted Y-shaped rolling mill.

The transmission principle of the three-roller transmission rolling mill is as follows: power is input through the long shaft 4 to drive the upper roller 15 to rotate, and then the short shafts 6 are driven to rotate through the two pairs of bevel gears 7 respectively, so that the lower two rollers 15 are driven to synchronously rotate with the upper roller 15, and rolling of rolled pieces is realized through the roller pass.

The effect of the small memorial archway 1 is as follows: the three rollers 15 are distributed at 120 degrees on the circumference, and a rolled piece channel surrounded by the rolling channels is called a pass of the rollers. The size of the hole pattern can be normally produced only by strict adjustment before production, so that a small memorial archway 1 is arranged. The hole shape is adjusted by adopting a metal pad between the contact end surfaces of the small housing 1 and the frame 5, and the adjusted hole shape is tightly pressed by 4 nuts. The small housing 1 cannot adjust the hole pattern on line.

An emulsion passage: the emulsion enters the upper emulsion chamber 18 from above the frame 5 to lubricate and cool the upper roll 15. The lower two rolls 15 are also lubricated and cooled by the impact and the weight of the emulsion. The emulsion cavity is inverted "Y" shaped and leads directly out of the housing 5. The emulsion flows out of the emulsion chamber 18 and then into the emulsion station to achieve circulating lubrication and cooling.

A lubricating oil passage: lubricating oil enters from the upper left of the frame 5 and is divided into three paths: one path lubricates a cylindrical roller bearing at the leftmost end of the long shaft 4; one way lubricates the bevel gear 7; one path enters the peripheral space of the inner spacer 12 through the left tapered roller bearing 9, then reaches the peripheral space of the right inner spacer 12 through the left small hole 151 and the axial groove 152 (in the roller) of the roller 15 and the right small hole of the roller 15, and finally flows into the right oil cavity 17 through the right tapered roller bearing 9. The two paths of lubricating oil on the right oil cavity also lubricate a conical gear 7 and a conical roller bearing 9 on the right side of the rolling mill. The lubricating oil of the left oil chamber 16 and the right oil chamber 17 can communicate with each other. This communication plays a substantial role in the lubrication of the two sets of stub shafts 4, conical gears 7 and tapered roller bearings 9 below the mill. Lubricating oil in the left oil chamber 16 and the right oil chamber 17 enters the peripheral space of the inner spacer 12 through the tapered roller bearings 9 on the short shafts 4 on two sides of the rolling mill, then sequentially enters the small holes 151, the axial grooves 152 and the small holes 151 to the peripheral space of the inner spacer 12 below, and finally enters the tapered roller bearings 9 below the short shafts 4 and enters the oil return chamber 19. Then flows into a lubricating oil pump station through an oil return port to realize circulating lubrication.

The problems of the upper-drive three-roller rolling mill are as follows:

1. the lubricating oil path and the emulsion channel are separated by two framework type rubber oil seals. This separation has two problems: 1) the pressure born by the framework type rubber oil seal is limited, the sealing can not be completely achieved, and a lubricating oil channel and an emulsion channel can not be completely separated; 2) once the seal face of the part wears to form a groove, the sealing performance is greatly compromised. The sealing surfaces here are the bearing sleeve outer circumferential surface and the roll small outer circumferential surface. The roller is made of alloy material, so the price is high and the service life of the pass is short. In order to reduce the use cost, the roller is rerouted when the pass service life is over, namely one roller can be used for multiple times. But the sealing surface of the roll is substantially lost.

2. The sealing of the small memorial archways cannot be solved: 1) because all the parts on the small housing are assembled and then installed in the machine frame, the matching holes of the small housing and the machine frame are necessarily grooved for positioning and rubber blocks are arranged in the grooves for sealing. However, the groove is shaped in a special shape, so that the sealing effect is poor; 2) due to the fact that the shape of the sealing channel is complex, even though the O-shaped rubber sealing strip is adopted, the sealing effect is poor, in addition, the hole type needs to be adjusted for the small memorial archways, when the hole type is small, the small memorial archways need to move outwards, and therefore the sealing effect between the sealing end face of the small memorial archways and the rack is poor.

Due to the above-mentioned problem of mixing oil (lubricating oil) and water (emulsion), the mixed liquid is often handled. Not only increases the production cost, but also brings environmental pollution.

In decades of use, all rolling mills are lubricated by emulsion, namely, the lubricating oil at the upper left of the stand is replaced by the emulsion. This brings about the following problems:

1) the lubricating performance of the emulsion is far inferior to that of the lubricating oil, and the emulsion contains more impurities, such as copper oxide, aluminum oxide, small blocks of aluminum and copper, which are removed by the users in an attempt to remove the impurities, but are not cleaned. This significantly reduces the life of mechanical parts such as shafts, gears, etc. According to the principle, the wearing parts of the rolling mill mainly comprise the roller, almost all parts are wearing parts, and the wearing parts and the roller are equally divided into autumn colors, so that the production cost is increased.

2) And poses a serious threat to the bearings in the rolling mill. The impurities in the emulsion not only have serious influence on the service life of the bearing, but also cause the bearing to be locked and locked or the bearing to be damaged, and the accident often happens. When the condition occurs, the rolling mill stops rotating, blocks rods and flies, and the personal safety of staff is greatly threatened (because the rod outlet speed is high). The whole set of rolling mill stops running, the rolling shear at the front end is started to shear the continuously cast spindle, and rolled pieces in more than ten rolling mills in the production line are still taken out, so that the labor and the foot are disturbed. At the moment, the water outlet of the furnace needs to be blocked, the casting machine continues to perform rapid casting, water (liquid metal) in a casting ladle is cast all the time, and then the water (liquid metal) is cut into short spindles through rolling shear for next furnace return, so that the energy consumption and metal burning loss are increased. This would seriously affect normal production, while maintaining the furnace temperature, i.e. the temperature of the casting water, since normal production is not resumed for a short time.

The structure of the existing lower transmission three-roller mill is shown in figure 3, and the structure is different from the upper transmission three-roller mill in that the long axis is arranged at the lower part, the two short axes are arranged at the upper part, the flowing direction of lubricating oil and emulsion in the structure is opposite to the flowing direction in the upper transmission three-roller mill, but the lubricating oil path and the emulsion channel are in the same structural form, and the problem of oil-water mixing also exists.

Disclosure of Invention

The invention aims to: aiming at the existing problems, the three-roller mill for oil-water separation is provided, and firstly the problem of poor sealing performance of a small housing is solved, and secondly measures are taken to enhance the oil-water separation between a lubricating oil channel and an emulsion channel.

The technical scheme adopted by the invention is as follows:

a three-roller rolling mill for separating oil from water comprises a mill case, a long shaft horizontally arranged in the mill case, and two short shafts respectively driven by the long shaft through bevel gears at the left and right ends, the input end of the long shaft is provided with a cylindrical roller bearing, the long shaft and the short shaft are respectively arranged in the rolling mill case through tapered roller bearings and bearing seat sleeves at two ends, the middle parts of the three shafts are respectively provided with a roller, the three rollers are Y-shaped and form a Y-shaped emulsion cavity with the rolling mill case, the end part of the bearing seat sleeve is embedded in the roller, a framework type rubber oil seal II is arranged between the outer contact surface of the bearing seat sleeve and the roller, and the bearing seat sleeve also comprises a seal sleeve, the end surface of the bevel gear is tightly propped against the outer end surface of the inner ring of the tapered roller bearing, one end of the sealing sleeve is tightly propped against the inner end surface of the inner ring of the tapered roller bearing, the other end of the sealing sleeve is embedded in the roller, a framework type rubber oil seal I and a framework type rubber oil seal III are arranged between the seal sleeve and the bearing seat sleeve; an upper eccentric sleeve and a lower eccentric sleeve which are partially toothed are further mounted between the bearing seat sleeves at two ends of one short shaft and the rolling mill box, an upper worm and a lower worm which are perpendicular to different surfaces of the short shaft are further mounted on the rolling mill box, the upper worm and the upper eccentric sleeve and the lower worm and the lower eccentric sleeve respectively form a worm and gear structure, and the upper worm and the lower worm synchronously rotate through a synchronous gear.

Compared with the traditional three-high rolling mill, the technical scheme has the following beneficial effects:

1. the traditional small memorial archways are cancelled, the hole pattern adjustment is realized by utilizing the principle of eccentric adjustment, and the technical means is adopted for the first time in the technical field;

2. the structure adopting eccentric adjustment is simpler, and the manufacturing cost is reduced;

3. the small housing window structure with a complex structure is not adopted, the overall dimension of the rolling mill is reduced, and the rigidity of the rolling mill is also improved;

4. the synchronous gear realizes linkage between the upper worm and the lower worm, and pass adjustment can be realized only by adjusting one of the worms, so that the operation is very simple, the on-line adjustment of the roll pass can be realized, the production efficiency of the whole production line is greatly improved, a large amount of cost is saved, and the method has very important economic value and significance;

5. the original outer spacer ring and inner spacer ring are replaced by a sealing sleeve with a longer length, and the outer circular surface at one end of the sealing sleeve replaces a roller to be in contact with the framework type rubber seal III;

6. the framework type rubber oil seal arranged between the bearing seat sleeve and the seal sleeve further enhances the isolation effect between the lubricating oil and the emulsion;

7. when the three-high mill works, the quick-wear part is a sealing sleeve, the sealing sleeve adopts heat treatment to increase the wear resistance, the structure is simple, and the manufacturing cost and the replacement cost are both very low.

The first parallel optimization is performed on the technical scheme, the long shaft is arranged above the rolling mill, the two short shafts are arranged below the rolling mill, the emulsion liquid inlet hole is formed in the top of the rolling mill box right above the roller on the long shaft, the lubricating oil inlet hole is formed in the top of the rolling mill box, the lubricating oil is guided to the cylindrical roller bearing, the conical gear and the conical roller bearing on the long shaft respectively for lubrication, and the oil cavity for returning oil is formed in the bottom of the rolling mill box. The preferred scheme is to arrange the long shaft at the upper part and the short shaft at the lower part, which is an improved upper transmission three-roller mill. Preferably, an oil distribution disc is arranged at a lubricating oil inlet hole at the top of the rolling mill box to divide the lubricating oil into three paths, wherein one path of the lubricating oil enters a left oil cavity to lubricate the cylindrical roller bearing on the left side of the long shaft, the other path of the lubricating oil enters a left oil cavity to lubricate the conical gear and the conical roller bearing on the left side of the long shaft, and the other path of the lubricating oil enters a right oil cavity to lubricate the conical gear and the conical roller bearing on the right side of the long shaft.

The second parallel optimization is performed on the technical scheme, the long shaft is arranged below, the two short shafts are arranged above, a lubricating oil inlet is formed in the top of the rolling mill box, lubricating oil is guided to conical gear bearings on the two short shafts in oil cavities for lubrication, a left oil cavity and a right oil cavity for oil return are formed in the lower portion of the rolling mill box, emulsion is guided into the rolling mill box through holes formed in the side portion of the rolling mill box corresponding to emulsion cavities around the two short shaft upper rollers, and emulsion is guided out of the rolling mill box through holes formed in the bottom of the rolling mill box corresponding to emulsion cavities around the two short shaft upper rollers. In the preferred scheme, the long shaft is arranged at the lower part, and the short shaft is arranged at the upper part, so that the improved lower-transmission three-roll mill is substantially improved.

Preferably, the rolling mill case is further provided with two adjustable compression bolts corresponding to the upper eccentric sleeve and the lower eccentric sleeve, and the compression bolts extend inwards from the outside of the rolling mill case and extend to the positions of the upper eccentric sleeve and the lower eccentric sleeve to abut against the upper eccentric sleeve and the lower eccentric sleeve. After the pass adjustment of the roller is completed, the hold-down bolt is adjusted to tightly support the upper eccentric sleeve and the lower eccentric sleeve, so that the looseness of the upper eccentric sleeve and the lower eccentric sleeve is prevented, and the rolling quality of a rolled piece is further ensured.

The scheme is further optimized, and an O-shaped rubber sealing ring I is arranged between the outer surface of a bearing sleeve on a long shaft and a short shaft which is not provided with an upper eccentric sleeve and a lower eccentric sleeve and a rolling mill box; and for the short shaft provided with the upper eccentric sleeve and the lower eccentric sleeve, O-shaped rubber sealing rings II are respectively arranged between the inner surfaces of the upper eccentric sleeve and the lower eccentric sleeve and the rolling mill box, and O-shaped rubber sealing rings III are respectively arranged between the outer surfaces of the upper eccentric sleeve and the lower eccentric sleeve and the bearing seat sleeve. This preferred scheme increases O type rubber seal on each contact surface, further prevents the seepage, strengthens the oil-water separation effect.

Preferably, the bearing block is sleeved at the bottom of a cavity between the tapered roller bearing and the first framework type rubber oil seal to lead out lubricating oil in the cavity, and the bearing block is sleeved at the bottom of a cavity between the third framework type rubber oil seal and the first framework type rubber oil seal to lead out emulsion seeped into the cavity to the emulsion cavity.

Preferably, the two sealing sleeves on the short shaft are communicated with the annular grooves on the sealing sleeves through holes at the cavity position between the tapered roller bearing and the framework type rubber oil seal, and the oil holes are formed in the short shaft to communicate the annular grooves on the two sealing sleeves on the same short shaft. This preferred scheme has changed traditional three-high mill's lubricating oil route, utilizes the inside oilhole of minor axis to carry out the transmission to further avoid lubricating oil and emulsion to take place to mix, strengthened oil-water separation's effect.

Drawings

Fig. 1 is a front sectional view of a conventional upper drive three-roll mill.

Fig. 2 is a partially enlarged view of fig. 1.

Fig. 3 is a front sectional view of a conventional under-drive three roll mill.

FIG. 4 is a front cross-sectional view of a drive-through three-high rolling mill of the present invention.

Fig. 5 is a partially enlarged view of fig. 4.

Fig. 6 is a sectional view a-a in fig. 4.

Fig. 7 is a sectional view B-B in fig. 4.

FIG. 8 is a front cross-sectional view of the underdrive three high mill of the present invention.

Fig. 9 is a partially enlarged view of fig. 8.

Labeled in fig. 1, 2, 3: 1 is a small memorial archway, 2 is an O-shaped rubber sealing ring, 3 is a rubber block, 4 is a long shaft, 5 is a frame, 6 is a short shaft, 7 is a bevel gear, 8 is an O-shaped rubber sealing strip, 9 is a tapered roller bearing, 10 is an outer spacing ring, 11 is a bearing seat sleeve, 12 is an inner spacing ring, and 13 and 14 are framework type rubber oil seals; roll 15, left oil chamber 16, right oil chamber 17, emulsion chamber 18, return oil chamber 19, orifice 151, and axial groove 152.

Labeled in FIGS. 4-7: the device comprises a long shaft 1, a rolling mill case 2, a short shaft 3, a bevel gear 4, a tapered roller bearing 5, a long shaft sealing sleeve 6, a framework type rubber oil seal I7, an O-shaped rubber sealing ring I8, a bearing seat sleeve 9, a framework type rubber oil seal II 10, a framework type rubber oil seal III 11, a roller 12, an upper eccentric sleeve 13, an O-shaped rubber sealing ring II 14, an upper worm 15, a lower eccentric sleeve 16, a lower worm 17, an O-shaped rubber sealing ring III 18, a synchronous gear 19, a compression bolt 20, a splitter disc 21, an oil hole 31, an annular groove 61, a left oil cavity A, a right oil cavity B and an oil cavity C.

Detailed Description

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

Example 1:

as shown in fig. 4, 5, 6, and 7, a three-high mill for separating oil from water comprises a mill case 2, a long shaft 1 and two short shafts 3 driven by the long shaft 1 through bevel gears 4 at left and right ends of the long shaft 1 are horizontally arranged in the mill case 2, a cylindrical roller bearing is arranged at an input end of the long shaft 1, the long shaft 1 and the short shafts 3 are respectively installed in the mill case 2 through tapered roller bearings 5 and bearing sleeves 9 at two ends, a roller 12 is respectively arranged in the middle of each of the three shafts, the three rollers 12 are Y-shaped and form a Y-shaped emulsion cavity with the mill case 2, an end of each bearing sleeve 9 is embedded in the roller 12, a framework type rubber oil seal secondary 10 is installed between an external contact surface of the bearing sleeve 9 and the roller 12, the three-high mill further comprises a seal cartridge 6, an end surface of the bevel gear 4 is tightly abutted against an outer end surface of an inner ring of the tapered roller bearing 5, one end of the seal cartridge 6 is tightly abutted against an inner end surface of the inner ring of the tapered roller bearing 5, the other end of the oil seal is embedded in a roller 12, and a framework type rubber oil seal I7 and a framework type rubber oil seal III 11 are arranged between the seal sleeve 6 and the bearing seat sleeve 9; an upper eccentric sleeve 13 and a lower eccentric sleeve 16 with teeth at local parts are further arranged between the bearing seat sleeves 9 at two ends of one short shaft 3 and the rolling mill box 2, an upper worm 15 and a lower worm 17 which are perpendicular to the different surfaces of the short shaft 3 are further arranged on the rolling mill box 2, the upper worm 15 and the upper eccentric sleeve 13 as well as the lower worm 17 and the lower eccentric sleeve 16 respectively form a worm and gear structure, and the upper worm 15 and the lower worm 17 realize synchronous rotation through a synchronous gear 19.

The long shaft 1 is arranged above the long shaft 1, the two short shafts 3 are arranged below the long shaft, an emulsion liquid inlet hole is formed in the top of the rolling mill case 2 right above a roller 12 on the long shaft 1, a lubricating oil inlet hole is further formed in the top of the rolling mill case 2, lubricating oil is respectively led to a cylindrical roller bearing, a conical gear 4 and a conical roller bearing 5 on the long shaft 1 for lubrication, and an oil cavity C for returning oil is formed in the bottom of the rolling mill case 2. The scheme is characterized in that the long shaft is arranged on the upper part, and the short shaft is arranged on the lower part, and the scheme is actually an improved upper-transmission three-roller mill.

An oil distribution disc 21 is arranged at a lubricating oil inlet hole at the top of the rolling mill case 2 to divide the lubricating oil into three paths, wherein one path of the lubricating oil enters a left oil cavity A to lubricate a cylindrical roller bearing on the left side of the long shaft 1, the other path of the lubricating oil enters a left oil cavity A to lubricate a conical gear 4 and a conical roller bearing 5 on the left side of the long shaft 1, and the other path of the lubricating oil enters a right oil cavity B to lubricate a conical gear 4 and a conical roller bearing 5 on the right side of the long shaft 1.

Two adjustable compression bolts 20 are respectively arranged on the mill box 2 corresponding to the positions of the upper eccentric sleeve 13 and the lower eccentric sleeve 16, and the compression bolts 20 extend inwards from the outside of the mill box 2 and extend to the positions of the upper eccentric sleeve 13 and the lower eccentric sleeve 16 to abut against the upper eccentric sleeve 13 and the lower eccentric sleeve 16.

For the long shaft 1 and the short shaft 3 which is not provided with the upper eccentric sleeve 13 and the lower eccentric sleeve 16, an O-shaped rubber sealing ring I8 is arranged between the outer surface of the bearing sleeve 9 on the short shaft and the rolling mill box 2; for the short shaft 3 provided with the upper eccentric sleeve 13 and the lower eccentric sleeve 16, O-shaped rubber sealing rings II 14 are arranged between the inner surfaces of the upper eccentric sleeve 13 and the lower eccentric sleeve 16 and the rolling mill box 2, and O-shaped rubber sealing rings III 18 are arranged between the outer surfaces of the upper eccentric sleeve 13 and the lower eccentric sleeve 16 and the bearing sleeve 9.

The bearing seat sleeve 9 is provided with a hole at the bottom of the cavity between the tapered roller bearing 5 and the framework type rubber oil seal I7 to lead out lubricating oil in the cavity, and the bearing seat sleeve 9 is provided with a hole at the bottom of the cavity between the framework type rubber oil seal III 11 and the framework type rubber oil seal I7 to lead out emulsion seeping into the cavity to the emulsion cavity.

Holes of the two sealing sleeves 6 on the short shaft 3 are communicated with the annular grooves 61 on the sealing sleeves 6 at the cavity position between the tapered roller bearing 5 and the framework type rubber oil seal 7, and the oil holes 31 are formed in the short shaft 3 to communicate the annular grooves 61 on the two sealing sleeves 6 on the same short shaft 3.

Example 2:

the embodiment has the long shaft arranged at the lower part and the short shaft arranged at the upper part, and is actually a modified lower-transmission three-high mill, as shown in figures 8 and 9. The components corresponding to the respective marks are the same as those in embodiment 1, and reference may be made to fig. 4, 5, 6, and 7 of embodiment 1. The difference from the embodiment 1 is that the long shaft 1 is arranged at the lower part, the two short shafts 3 are arranged at the upper part, the top of the mill case 2 is provided with a lubricating oil inlet hole and guides the lubricating oil to the conical gear bearings 5 on the two short shafts 3 for lubrication in the oil cavity C, the lower part of the mill case 2 is provided with a left oil cavity A and a right oil cavity B for oil return, the side part of the mill case 2 is respectively provided with holes corresponding to the emulsion cavities 21 around the upper rollers 12 of the two short shafts 3 to guide the emulsion to the inside of the mill case 2, and the bottom of the mill case 2 is provided with holes corresponding to the emulsion cavities 21 around the upper rollers 12 of the two short shafts 3 to guide the emulsion to the outside of the mill case 2.

Claims (1)

1. The utility model provides an oil-water separation's three-high mill, includes mill machine case (2), and the incasement level sets up two minor axis (3) that major axis (1) and major axis (1) drive respectively through its left and right sides both ends conical gear (4), major axis (1) input sets up cylindrical roller bearing, major axis (1) and minor axis (3) are installed in mill machine case (2) through tapered roller bearing (5) and bearing housing (9) at both ends respectively, and three axle middle parts set up one roll (12) respectively, and three roll (12) are the Y type and form Y type emulsion chamber between mill machine case (2), embedded the setting of bearing housing (9) tip is in roll (12), installs skeleton formula rubber oil blanket two (10) between bearing housing (9) external contact surface and roll (12), its characterized in that: the end face of the conical gear (4) is tightly abutted to the outer end face of the inner ring of the conical roller bearing (5), one end of the sealing sleeve (6) is tightly abutted to the inner end face of the inner ring of the conical roller bearing (5), the other end of the sealing sleeve is embedded in a roller (12), and a framework type rubber oil seal I (7) and a framework type rubber oil seal III (11) are arranged between the sealing sleeve (6) and the bearing seat sleeve (9); an upper eccentric sleeve (13) and a lower eccentric sleeve (16) with teeth at local parts are further arranged between a bearing seat sleeve (9) at two ends of one short shaft (3) and a rolling mill box (2), an upper worm (15) and a lower worm (17) which are perpendicular to the different surfaces of the short shaft (3) are further arranged on the rolling mill box (2), the upper worm (15) and the upper eccentric sleeve (13) as well as the lower worm (17) and the lower eccentric sleeve (16) respectively form a worm gear structure, synchronous rotation is realized between the upper worm (15) and the lower worm (17) through a synchronous gear (19), the long shaft (1) is arranged above the two short shafts (3) below, an emulsified liquid inlet hole is formed at the top of the rolling mill box (2) right above a roller (12) on the long shaft (1), a lubricating oil inlet hole is further formed at the top of the rolling mill box (2), and the lubricating oil is respectively guided to a cylindrical roller bearing, a conical roller gear (4) and a conical roller bearing (5) on the long shaft (1) for lubrication, an oil cavity (C) for returning oil is formed in the bottom of the rolling mill case (2), an oil distribution disc (21) is installed at a lubricating oil inlet hole in the top of the rolling mill case (2) to divide lubricating oil into three paths, one path of lubricating oil enters a left oil cavity (A) to lubricate a cylindrical roller bearing on the left side of the long shaft (1), the other path of lubricating oil enters a left oil cavity (A) to lubricate a conical gear (4) and a conical roller bearing (5) on the left side of the long shaft (1), and the other path of lubricating oil enters a right oil cavity (B) to lubricate a conical gear (4) and a conical roller bearing (5) on the right side of the long shaft (1);

the bottom of the cavity between the tapered roller bearing (5) and the framework type rubber oil seal I (7) of the bearing seat sleeve (9) is provided with a hole to lead out lubricating oil in the cavity, and the bottom of the cavity between the framework type rubber oil seal III (11) and the framework type rubber oil seal I (7) of the bearing seat sleeve (9) is provided with a hole to lead out emulsion seeped into the cavity to an emulsion cavity;

holes of two sealing sleeves (6) on the short shaft (3) are communicated with annular grooves (61) on the sealing sleeves (6) at a cavity position between the tapered roller bearing (5) and the framework type rubber oil seal I (7), and oil holes (31) are formed in the short shaft (3) to communicate the annular grooves (61) on the two sealing sleeves (6) on the same short shaft (3);

for the short shaft (3) provided with the upper eccentric sleeve (13) and the lower eccentric sleeve (16), O-shaped rubber sealing rings II (14) are arranged between the inner surfaces of the upper eccentric sleeve (13) and the lower eccentric sleeve (16) and the rolling mill box (2), and O-shaped rubber sealing rings III (18) are arranged between the outer surfaces of the upper eccentric sleeve (13) and the lower eccentric sleeve (16) and the bearing seat sleeve (9);

two adjustable compression bolts (20) are respectively arranged on the rolling mill box (2) corresponding to the positions of the upper eccentric sleeve (13) and the lower eccentric sleeve (16), and the compression bolts (20) extend inwards from the outside of the rolling mill box (2) and extend to the positions of the upper eccentric sleeve (13) and the lower eccentric sleeve (16) to be abutted against each other.

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