FI119257B - Gear assembly for driving the suction roll and supporting the inside structures of the suction roll - Google Patents

Description

119257

TRANSMISSION ARRANGEMENT FOR USE OF IMUTELA AND FOR SUPPORTING THE INTERNAL STRUCTURES OF IMUTELA

The invention relates to a gearbox assembly for driving an auxiliary roller 5 and to supporting internal structures of a suction roller, which gearbox includes: - a machine frame mounted on a support base and gear housing and support bracket to support the inside of the suction roller from the machine frame * 15

A suction roll gear assembly is known in the art, and is shown in Figure 1. The gear assembly includes a machine frame on which the suction roll is supported by a support bearing assembly. The support bearing is generally attached to the inside of the machine frame, whereby the suction roll 20 is supported by the supporting bearing from its outer surface to the machine frame. The internal structures of the suction roll are supported by a support frame which is fixed to the machine frame. A gear wheel · ϊ / · | is mounted on the suction roller to use a suction roll. The gear wheel is supported by a drive bearing system on the gearbox, from which torque is transmitted via the torque support: V: 25 to the machine frame. The gear wheel is mounted on the roll casing:: *: the extension flange shaft. When the gear wheel and gearbox are supported, the gearbox is also supported • · ·: ***: on the flange shaft. The flange axis which extends the roll shell is

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further supported by a support bearing from the machine frame. Gearbox. : '· 30 The support frame and support ring are on the opposite side of the support bearing • · *. ***. like a suction roll jacket. A switch implemented with such a structure • · ·. *. the replica assembly is long, extending far from the support bearing assembly.

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The suction roll drive gear can also be bearing as disclosed in U.S. Patent No. 35,860,322. This patent utilizes a support * ί ** ί bearing assembly to support the suction roller from within the suction roller.

In this case, the gear wheel can be mounted on the outside of the suction roller 119257 2 at the support bearing, thereby significantly reducing the length of the gearbox assembly. In order to support the bearing assembly located inside the suction roll, the machine frame must be made more complex. In addition, when the suction roll is supported from inside the shaft of the 5 suction rolls to the machine body inside the shaft, the suction assembly is significantly reduced.

It is an object of the invention to provide a shorter gear assembly for operating a suction roll and supporting the internal structures of the suction roll. Characteristic features of the present invention are set forth in the appended claim 1. When the gearbox body is on the opposite side of the support bearing than the support ring, the gearbox assembly extends axially outward from the center of the support bearing and thus outward of the machine frame. This leaves more space on the drive side of the paper machine.

The press section of the papermaking machine uses suction rollers to enhance dewatering from the press nip. Inside the suction roller-20, these structures apply a vacuum to a desired portion of the suction roll surface. The gearbox assembly uses a suction roller and • · * support. *! internal structures of the suction roll. The gearbox assembly • · · · ... * includes a chassis-supported machine frame, with the suction roller • · *. *. * Supported by a support bearing assembly. In other words, the support bearing assembly is • ·; 25 inside the machine frame by supporting the outside of the suction roller indirectly to the machine frame. A gear wheel is attached to the suction roller, through which the suction roller is operated. More specifically, the gear wheel attached to the suction roll is fixed to the flange shaft of the suction roll.

The gearbox is connected to a gearbox to which the gearwheel l "/. 30 is supported. Between the gearwheel and gearbox there is a drive. ·!: Bearing system. In other words, the gear and drive gear are« · «supported with one another. Unexpectedly • · · · ··· * gearbox body is on opposite side of support bearing assembly to '* 35 support ring. The solution according to the invention significantly reduces the length of the gearbox and flange shaft. The solution according to the invention is suitable for both slow and fast machines. In addition, the solution reduces costs as the support frame becomes shorter and simpler, and the inside structures of the suction roller do not need to extend so far that the length of the flange shaft can be shortened.

In one embodiment, the gear wheel is 1-ring, thereby minimizing the axial space requirement.

ίο In another embodiment, the gear has a cogged tooth which significantly reduces noise.

In a third embodiment, the inclined tooth is at an angle of 1 to 10 °, preferably 2 to 6 °. When the inclination angle 15 of the inclined gear is small, only a small axial force is exerted thereon. In this case, the groove ball bearings, which are preferably slanted ball bearings, are able to carry the load well and the overall construction is advantageous.

In a fourth embodiment, the drive bearing assembly is spring-loaded. The spring load applied to the bearing: \ j ensures that the bearings function normally with: j ": the gearbox assembly even with a light load or even with a zero load: V: rack. In the structure of the invention, a zero load could cause significant problems for the gear bearing. M ·; load can be avoided by spring loading.

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In a fifth embodiment, the transmission assembly. includes torque support to transmit gearbox body • · · • · Φ, ···. 30 moment to the chassis. The gearbox body is typically bound • · · /. torque support to the machine frame, so that the gearbox frame and the machine frame «« · * · * · can live slightly together.

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In a sixth embodiment, the axial *: **: 35 axial protrusion of the bearing ring is less than 80%, preferably less than 60%, of the inside diameter of the bearing.

119257 4

With such a small amount of axial protrusion of the support frame from the support bearing, the support frame can be manufactured with considerable advantage.

The invention will now be described in detail with reference to the accompanying drawings, in which:

Fig. 1 is a side view of a prior art gearbox assembly and Fig. 2 is a side view of a gearbox assembly of the invention and

Fig. 3 shows a gear assembly according to the invention towards the end of a suction roll.

15 illustrates a prior art gear assembly 10 on a base 18. The gear assembly 10 includes a machine body 16 to which suction roll 12 is secured by a support bearing 20. The support assembly 20 is secured to the inside of the machine body 16, wherein suction roll 12 is supported by a support bearing 20 from the outer surface to the machine frame 16. The inner structures 14 of the suction roller are supported by a support ring 28 'attached to the machine frame 16. The support ring 28' may consist of a plurality of parts, such as a support member 27 'and an extension 29'. There is a vent hole 30 in the extension portion of the support frame 28 '. . * · To the shaft 32, a gear 22 is mounted to drive the suction roll 12. A suction roll suction connection is attached to the support frame or to the internal * * * structures of the suction roll supported by it. Gearbox is. . ·. bound to the support frame by means of support. Toothed wheel 22 is • · · • · φ. ···. 30 supported by a drive bearing assembly 26 on a gearbox body 24 'which is • · • bonded to a machine body 16. The gearbox body 24' and a support ring 28 'are • · · * · "opposite the support bearing assembly 20 to the suction roll 12 * * shell 34. * The implemented gearbox assembly extends far beyond the 35 * ends of the machine frame and thus takes up a lot of space.

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Fig. 2 shows a gearbox assembly 10 according to the invention which drives the suction roll 12 through the flange shaft 32 and supports the inner structures 14 of the suction roll 12. The suction roll 12 includes a flange shaft 32 connected to the end 34 of the suction roll 12. supported on a base 18. A support bearing assembly 20, usually consisting of a single support bearing 21, is mounted on the inside of the machine body 16, the support body 20 supporting the suction roll 12 on the machine body 16. More specifically, the supporting body 20 mounted on the inside of the machine body 16 a gear wheel 22 for driving the suction roll 12. Said gear is driven by another smaller gear which is still driven by a motor. Gear wheel 22 is supported by gearbox-15 size 24, which is secured to machine frame 16. Between gearbox 24 and gear wheel 22 includes a drive bearing assembly 26. Gear assembly 10 includes a support ring 28 for supporting 20 than the support frame 28. In this case, the support frame 28 is on the opposite side of the support bearing assembly 20 than the sheath 34 of the roller 12. The structure according to the invention allows the support frame to be manufactured in a lighter structure. In addition, the support ring can be easily manufactured in one piece.

• ♦ • · · • · · • •; *; 25 In the gearbox assembly 10 shown in Figure 2, the support bearing 20 IM · • and the drive bearing assembly 26 are in the same oil space 36. The structure i · »is very compact when the support and drive bearing are lubricated ·· · with the same gear. mode. In addition, only one tube, • · ·. ···, 30 is needed to transport the oil, which simplifies the structure as a whole. The support ring • «• · ·. *, 28 has a vent hole 30.

• · · • · · • *. In the gearbox assembly shown in Fig. 2, the inner diameter of the support bearing ,, * · * is 400-1200 mm, preferably 700-1000 mm and *: ··; 35 it is adapted to transmit a power of 100 to 1500 kW, preferably 6 119257 600 to 1100 kW. The inside diameter of the bearing assembly 20 is twice the inside radius r.

In the gearbox assembly shown in Fig. 2, the axial protrusion 1 of the bearing frame 28 from the axial center of the bearing assembly 20 is less than 80%, preferably less than 60%, of the inside diameter of the bearing assembly 20.

Figure 3 illustrates a gearbox assembly 10 according to the invention comprising a torque support 38 for further transmitting the gearbox body to the base 18. When transmitting the gearbox body 24 to a further support for the gearbox 38, the gearbox body and the engine body support are flexibly supported. The flexible support between the gearbox body and the 15 engine body, in turn, allows the gear to be rigidly attached to the suction roll.

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Claims (10)

A gearbox assembly for driving a suction roll and supporting internal structures of a suction roll, the gearbox door 5 comprising: - a machine frame (16) mounted on a support base (18), - a suction roll (12) support bearing assembly (20) secured to the suction roll (12) on the machine body (16) from the outside of the suction roll (12), xo - a gear (22) attached to the suction roll (12) for driving the suction roll, - a gear housing (24) for transmitting torque, - a drive bearing assembly (26) between the gear A support frame (28) for supporting the inside structures (14) of the suction roller (12) from the machine frame (16), characterized in that the gear housing (24) is on the opposite side of the support bearing assembly (20). Gear assembly according to Claim 1, characterized in that the inner diameter of the support bearing (20) is: .1 ·· 400 - 1200 mm, preferably 700 - 1000 mm. ··· • · • · · «· • m ϊ.ϊ The gearbox assembly according to claim 2, characterized in that the gearbox assembly (10) has a power of: -: - 100 to 1500 kW, preferably 600 to 1100 kW. • 1 · '«1 · • · • · ·« » A gearbox according to any one of claims 1 to 3; telma, characterized in that the gear wheel (22) is 1-ring. ··· ··· λ «• 1 30 • ·« ··. A gearbox assembly according to any one of claims 1 to 4, characterized in that the gear wheel (22) has an inclined gear. TUS. · «« ·· 1 · · 119257 8 Transmission assembly according to Claim 5, characterized in that the inclined gear is at an angle of 1 to 10 °, preferably 2 to 6 °. Gear assembly according to one of Claims 1 to 6, characterized in that the drive bearing assembly (26) is spring-loaded. 7, 119257 A gearbox assembly 10 as claimed in any one of claims 1 to 7, characterized in that the gear assembly (10) includes a torque to the gearbox body (24) transmitted by a torque support (38) to the gearbox body (24). Transmission door assembly according to one of Claims 1 to 8, characterized in that the support bearing (20) and the drive bearing assembly (26) are in the same oil space (36). Gear assembly according to one of Claims 1 to 9, characterized in that the axial protrusion (1) of the support ring (28) from the axial center of the support bearing (20) is less than 80%, preferably less than 60%, of the inner diameter of the support bearing (20). • · • 1 · '· 1! diameter. • ft 4 • · · · · · · · 1 1 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • · · * »1 • • • • • • • • • 1 • 1« • 1 «• · •« • · · 1 · «119257 9