FI78322C - KONVERTER. - Google Patents

Description

1 78322

This invention relates to metallurgy and more particularly to converters.

The invention can be used in the manufacture of ferrous and non-ferrous metals.

The proposed converter can be used most successfully in steelmaking.

A converter is known from the prior art (cf. DE Application Publication No. 2,500,645 IPC C 21 c 5-50, published 1975), which comprises a casing attached to a carrier ring, a gear and a tipping device with a slow reduction gear. The carrier ring rests on one side of the bearing support shaft pin (free shaft pin), while on the other side it rests on the 15 pivot shaft pin (drive shaft pin). The drive shaft pin is freely attached to the bearings of the low reduction stage bearing bushes of the tipping device. The gear is housed in the housing of the slow reduction gear and is rigidly connected to the drive shaft pin. The drive shaft pin is movably connected to the support ring to transfer torque thereto. In addition, the support ring is capable of rotating and displacing axially with respect to the drive shaft pin.

The tipping device of this converter is made fixed with 25 bearing supports to reduce the overall dimensions of the converter.

However, the drive shaft pin applies a considerable bending moment to the housing of the slow reduction gear. The bearing 30 of the drive shaft pin located on the side of the converter blade is subjected to almost twice the load of the converter mass. This results in slow reduction gear housing warping and premature bearing failure, resulting in limited load capacity of the tipper, more repairs and machine failures, as well as reduced reliability and shorter life of the tipper and the entire converter in general.

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A converter is known from the prior art (cf. AT Patent Publication No. 336,057 IPC C 21 C 5/46, published April 12, 1977), which comprises a jacket attached to a carrier ring, a gear wheel and a tipping device with a slow reduction gear.

5 The support ring comprises two axle pins, one of which (free axle pin) is positioned on the support so that it can rotate and move axially, while the other (drive axle pin) is arranged to rotate on a support which acts as a housing for the low reduction gear of the tipping device. Arrangement of both axle pins so that they can rotate is necessary to compensate for their skew in the carrier ring, which normally occurs in the manufacture of such carrier rings with axle pins.

The gear is housed in the cow of the slow reduction gear ko-15 and connected to a movably driven shaft pin. This kinematic connection is effected by means of a toothed ring or a toothing inside the gear hub with substantially straight teeth and a toothed spherical sleeve with barrel-shaped teeth fixedly connected to the drive shaft sleeve. .

In this converter design, the tipping device is combined into one unit with a bearing support, which allows the total size of the 25 converters to be reduced. The weight of the converter is evenly distributed on the plain bearings attached to the low reduction gear bearing bushes, whereby the loads are more evenly applied to the slow reduction gear housing and the housing distortions are minimized.

30 However, the high unit weights transferred by the weight of the converter to the plain bearings cause rapid wear of the latter. In order to reduce the unit weights on plain bearings, it is necessary to increase their size. This in turn causes the length of the drive shaft 35 to increase, increasing the bending moment to which the connection of this shaft pin to the bearing ring is exposed.

3 78322 Thus, high unit loads adversely affect the load capacity of the convert tipper, as well as making it less reliable and reducing its service life.

5 The compensation of the inclination of the drive shaft journal is also limited by the inherent ability of the self-adjusting sleeve toothed with barrel-shaped teeth, which adversely affects the performance of the converter in general.

In addition, making toothing on the inner surface of the gear 10 is difficult, even impossible, when it extends to a certain depth. This makes the converter described above more difficult to manufacture.

Furthermore, a converter is known (cf. USSR Inventor's Certificate No. 469 752 IPC C 21 C 5/42, published June 13, 1972), which comprises a jacket attached to a carrier ring, a gear and a tipping device with a slow reduction gear.

The support ring has two axle pins, one of which (free axle pin) is rotatably mounted in the support and axially displaceable, while the other (drive axle pin 20) is arranged to rotate inside the support, which also acts as a housing for the low reduction gear of the tipping device.

The housing of the slow reduction gear has bearing bushes into which the gear is inserted by means of a hub and bearings.

25 The toothing formed by the substantially straight teeth is made inside the hub around the geometric axis of the gear. The toothing connects the gear to the movable drive shaft pin via a toothed spherical sleeve with barrel-shaped teeth, this sleeve being fixedly connected to the drive shaft pin and surrounded by spherical sleeves 11a attached to the slow reduction gears. to the navel.

In this converter, the tipping device is made as a single unit with a bearing support to reduce the overall size of the converter. The force exerted by the weight of the converter is evenly distributed on the bearings located in the bearing bushes of the low reduction gear housing, loading the housing of the slow reduction gear more evenly and thus reducing its susceptibility to deformation.

However, such a tipping device is only able to transmit a relatively limited torque because the recess in the gear hub is limited by the size of the bearings and the thickness of the hub itself, making it impossible to guarantee the maximum diameter of the gear hub gear and the toothed spherical sleeve.

The smoothing of the inclination of the drive shaft journal is inherently limited by the compensating ability of the spherical toothed sleeve having the barrel-shaped teeth, adversely affecting the overall power of the converter.

15 In addition, toothing on the inside of the hub hub is difficult, even impossible, to a certain depth. This in turn makes the converter more difficult to manufacture.

A converter is also known (cf. USSR Inventor-20 Certificate No. 531 851, published in Russian in "Discoveries, Inventions, Industrial Designs, Trade Marks" No. 38, 1976), comprising a sheath attached to a carrier ring, two gears and two tipping devices, each with a slow reduction gear. The support ring 25 has two drive shaft pins, one of which is able to rotate and move axially in a support which also acts as a housing for the first drive. The second drive shaft pin is capable of rotating in the second support, which acts as a housing for the slow 30 reduction gear of the second tipping device.

In the housing of both slow reduction gears, a gear wheel is arranged on bearing-thin bearings, which is movably connected to its shaft journal by a toothed connection. Each shaft journal is attached to the hub of the respective gear 35 by a spherical sleeve and a sleeve.

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The tipping device of the converter is likewise brought together with the bearing support in order to reduce the overall dimensions of the converter. Each drive shaft pin is connected to a corresponding gear with a toothed connection, which makes it possible to increase the angle of inclination of the shaft pin and thus increase the compensating capacity of the tipping device.

Arranging each axle pin inside the corresponding gear hub of the slow reduction gear, as well as the size of the recess in each hub, which is limited by the size of the bearings and the thickness of each gear hub, ultimately results in a reduction in displacement torque.

It is therefore an object of the present invention to provide a converter which avoids the disadvantages of the prior art described above, more particularly the invention relates to a converter in which the gear of the tipping device is constructed to increase the torque transmitted by the drive and its load carrying capacity.

The object of the invention is achieved by a converter comprising a jacket attached to a support ring by axle pins, one of which is arranged on a support so as to be able to rotate and move in the axial direction, while the other shaft pin is arranged to rotate on a second support with a low reduction gear. the housing has a bearing sleeve and a gear wheel movably connected to the shaft journal; according to the invention, the second shaft pin is supported on a bearing sleeve of a slow reduction gear housing, while the gear is displaced relative to this bearing sleeve and arranged in the housing behind the bearing sleeve and in line therewith by means of annular support surfaces.

'The proposed structure allows for a substantial reduction in the overall dimensions of the converter, together with an increase in its volumetric capacity, which is particularly advantageous when modernizing steelmaking plants with the aim of achieving higher production efficiencies.

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The use of converters such as the one proposed in steelmaking plants makes it possible to significantly save floor space, reduce the capital costs associated with building the plant and improve the efficiency of the converters 5 compared to prior art converters, all other things being equal.

Arranging a second (drive) shaft pin in the low reduction gear housing bearing sleeve in a large bearing allows the use of a larger diameter drive shaft 10 pin, as well as displacing the vertical geometry of the gear with this bearing sleeve. This, in turn, increases the torque and load capacity transmitted by the converter tipper.

In addition, such an arrangement of the tipping device is easier to manufacture; it also simplifies the installation and operation of the converter.

20 The modifications described above make it possible to improve the performance of the converter, to reduce the downtime due to repairs and to increase the industrial power of the converter.

The invention will now be described in more detail with reference to certain embodiments thereof, with reference to the accompanying drawings, in which: Figure 1 is an overview of a converter with a plurality of motor drives mounted on one side thereof; Fig. 2 is a sectional view of the tipping device; and Figure 3 is a sectional view of a modified tipping device according to the invention.

The converter according to the invention comprises a sheath 1 (Fig. 1) which is fixed with a uniform radial clearance in a carrier ring 2 having a free shaft pin and a drive shaft pin, numbered 3 and the like.

II

7 78322 Tue 4 marked. The free shaft pin 3 is attached to the floating bearing support 5 in order to be able to rotate and move in the axial direction on the frame 6. The drive shaft pin 4 is able to rotate on the support 7.

5 Inside this support 7 there is a multi-motor drive 8.

The drive device 8 is fixedly connected to the frame 9 and comprises a slow reduction gear 10 and four fast reduction gears 11 with an electric motor 12.

10 The number of fast reduction gears 11 may vary depending on the desired transmission power.

The slow reduction gear 10 (Fig. 2) has a housing 13 and a bearing sleeve 14, the housing 13 has a toothed wheel 15 which can engage the four clutch shafts 16 on which the high reduction gears 11 (Fig. 1) are mounted. Each clutch shaft 16 (Fig. 2) has two rollers 17. The bearing sleeve 14 is supported by a shaft pin 4 driving the ring 2 (Fig. 1) by means of a spherical sleeve 18 (Fig. 2) surrounded by spherical housings 20 19 and 20 inside the bearings 21. , which are fixed in place in the recess 14 of the bearing sleeve.

Such an arrangement of the drive shaft pin 4 makes it possible to increase its diameter as much as possible and thus increases the load-bearing capacity of the drive device 8 (Fig. 1).

The toothed wheel 15 (Fig. 1) is connected to the movably driven shaft pin 4 by means of a toothed sleeve 22 and a toothed casing 23. The toothed sleeve 22 is fixedly connected to the other end 30 24 of the drive shaft pin 4 and is prevented from moving axially by the end plate 25. The toothed housing 23 is arranged inside the hub 26 of a toothed wheel 15 with toothing 27.

The axial displacement of the toothed sheath 23 is limited by the protruding portion 28 of the end plate 29.

The toothed wheel 15 is displaced relative to the bearing sleeve 14 of the housing 13 of the slow reduction gear 10 and is arranged in this housing after the recess of the bearing sleeve 14 and in line therewith.

Such an arrangement of the toothed wheel 15 makes it possible to release the wheel 15 from the weight of the converter, as well as to make the diameter of the toothed sleeve 22 and the toothed casing 23 as large as possible, whereby a higher torque can be transmitted by the drive 8.

The toothed wheel 15 is centered and secured axially and radially with respect to the recess of the bearing sleeve 14 10 by means of annular bearing surfaces 30 made on the end faces of the toothed wheel 15 and cooperating with the rollers 17 of the clutch shafts 16.

If the rollers 17 are fixedly connected to the clutch shafts 16, they rotate without slipping on the annular surfaces 30 of the toothed wheel 15 15, the diameter of each roller 17 being the same as the distribution circle of the teeth of the clutch shaft 16. The diameter of the rollers 17 is selected from a structural examination if these rollers 17 are attached to the coupling shafts 16 so that they can move.

Referring now to Figure 3, another modification of the arrangement of the drive shaft pin 4 in the bearing sleeve 14 of the housing 13 of the slow reduction gear 10 is shown.

In this case, the drive shaft pin 4 is arranged in the bearing sleeve 14 using a large spherical bearing 31 31. Such an arrangement simplifies the installation of the drive shaft pin 4 in the bearing sleeve 14 of the housing 13 of the slow reduction gear 10.

Figure 3 also illustrates another variation of centering and securing the toothed wheel 15 in the axial direction 30 and in the radial direction with respect to the recess of the bearing sleeve 14. This centering and fixing of the toothed wheel 15 is done by means of annular bearing surfaces 32 arranged on the outer surfaces of the hub 26 of the toothed wheel 15.

These annular surfaces 32 engage with ordinary or plain bearings 33 mounted inside the housing 13 of the slow reduction gear 9 7.8322 10, which makes it possible to simplify the structure of the drive 8.

In view of the above, placing the toothed wheel in the housing 13 of the slow reduction gear 10 and moving it 5 relative to the recess of the bearing sleeve 14 after and in line with the recess makes it possible to release the gear 15 from the converter weight, as well as to ensure 8 out of 10 teas.

In addition, the arrangement of the drive shaft 4 in the bearing sleeve 14 by means of a spherical sleeve 18, a spherical shell 19, 20 and bearings 21 makes it possible to increase its diameter to a maximum and thus increase the load capacity of the converter drive 8.

The proposed converter works as follows.

The converter is charged with the required amount of scrap metal, after which the hot metal is added and the converter is returned to a vertical position to supply oxygen there.

20 During the operation of the converter, thermal expansion takes place in the ring 2 in the direction of the shaft pins 3 and 4.

This expansion is compensated by the displacement of the floating bearing support 5.

The converter is tilted by starting the electric motor-25 rit 12.

The torque is transmitted from the electric motors 12 by fast reduction gears 11 through the clutch shafts 16, the gear 15, the toothed casing 23 and the toothed sleeve 22 to the drive shaft 4, which in turn transfers the torque-30 to the converter ring 2 and casing 3.

During operation, the angular displacement of the free shaft pin 3 is compensated by the bearing of the floating bearing support 5, whereby the angular displacement of the drive step pin 4 is compensated by a spherical sleeve 18.

When installing the converter, it is possible that the bearing of the floating support 5 and the recess of the bearing sleeve 14 of the support 10 78 322 7 comprising the multi-motor drive 8 are not in the same line in the axial direction.

In use, however, this lack of coaxiality is offset by the bearing of the floating support 5 and the rotation of the spherical sleeve 5 18 relative to the spherical shells 19 and 20, while the toothed sleeve 22 and the toothed sheath 23 move simultaneously with respect to the hub 26 of the gear 15.

When the recesses are aligned in the axial direction when the converter is tilted, the spherical sleeve 18, 10 toothed sleeve 22 and toothed sheath 23 remain in place with respect to the spherical shells 19 and 20 and the gear hub 26, thus ensuring greater reliability and longer operation of the drive 8 and the entire converter.

During operation, the annular bearing surfaces 30 prevent axial displacements of the gear 15 and can be loaded with smaller radial loads due to balancing the mass of the gear 15 with the radial forces acting on the gear clutches 16 which engage the gear 15 as it engages.

Claims (1)

A converter comprising a sheath (1) attached to a support ring (2) by shaft pins (3,4), one (3) of the shaft pins being arranged in the support (5) so as to be able to rotate and move in the axial direction when while the second shaft pin (4) is arranged to rotate in a second support (7) with a tipping device (8) with a slow reduction gear (10), the housing (13) having a bearing sleeve (14) 10 and a movable second shaft pin (4) gear (15), characterized in that the second shaft pin (4) is supported on a bearing sleeve (14) of the slow reduction gear housing (13), while the gear (15) is displaced relative to this bearing sleeve (14) and arranged in the housing (15). 13) · behind the bearing sleeve (14) and in line with it via the annular support surfaces (30). »·. Sf