CN104235133A

CN104235133A - Apparatus for wood fiber drawing machine

Info

Publication number: CN104235133A
Application number: CN201410252361.5A
Authority: CN
Inventors: 塔内利·于勒宁; 维莱·P·埃罗宁
Original assignee: Valmet Technologies Oy
Current assignee: Valmet Technologies Oy
Priority date: 2013-06-14
Filing date: 2014-06-09
Publication date: 2014-12-24
Anticipated expiration: 2034-06-09
Also published as: FI126526B; AT514365B1; AT514365A3; AT514365A2; FI20135653A; CN104235133B

Abstract

The invention relates to an apparatus for a wood fiber drawing machine (10), comprising two machine elements (14, 16) locked in a loosing way and provided with an opening (12); a bolt (18) inserted between the machine elements (14, 16) and fixed in a loosing way, used for coupling the machine elements (14, 16); and a locking apparatus (24) used for locking the bolt (18) on the selected machine elements (14, 16), wherein the bolt (18) and the selected machine elements 914, 16) are arranged relatively, and the locking apparatus (24) comprises a lockpin (28) arranged on one part and a locking surface (26) arranged on a relative part, wherein the locking apparatus (24) is arranged on the bolt (18) laterally.

Description

Device for a fiber web machine

Technical Field

The invention relates to a device for a fiber web machine, comprising: at least two machine elements which are releasably lockable to one another and each have an opening; a bolt inserted between the machine elements and releasably fixed for relatively coupling the machine elements; locking device for locking a bolt on a selected machine element, wherein the bolt and the selected machine element form parts which are opposite to each other, and the locking device comprises a locking pin on one of the parts and a stop surface on the opposite part.

Background

In fiber web machines there are a large number of machine elements that have to be regularly maintained. Among these mechanical elements are, for example, various rotatable rollers and pressure rollers equipped with rotating jackets, the latter requiring maintenance even for weeks. During operation, the pressure roller must be connected to its counter roller, for example, by a bearing housing, so that the pressure roller and the counter roller are held together under load. In view of the need for quick and smooth maintenance, it is important to enable the press roll and the counter roll to be quickly and easily separated from each other.

It is generally known that the bearing housings of the pressure rollers are fixed by means of stationary, i.e. fixed machine elements, in which case these machine elements may consist, for example, of fixed connecting rods with openings for fastening bolts. At the same time, a flange with an opening for fastening a bolt is also provided on the bearing housing. The connecting rod is inserted between the flanges of the bearing housing such that the openings of the connecting rod and the flanges coincide with each other, and then the fastening bolt is inserted into the opening of the bearing housing and the opening of the connecting rod. Thereby, the fastening bolt locks the bearing housings to each other by means of the connecting rod.

The bearing housing usually has a bushing, for example made of bronze, which serves as a fit between the bearing housing and the fastening bolt and which locks the fastening bolt fixedly in its position. According to the prior art, the bolt can be fixed with a locking pin, which can be formed, for example, by a flange that is fixed to the bearing housing by means of a bolt, which flange is located partly in front of the end of the fastening bolt and prevents the fastening bolt from coming off. However, such a construction is difficult to loosen when the fastening bolt is removed.

The problem with this structure according to the prior art is that: the fastening bolts are difficult to insert and insufficiently locked, especially in an inclined nip, i.e. a press seam.

Disclosure of Invention

The object of the invention is to provide a better arrangement for a fiber web machine than the arrangements according to the prior art, in which arrangement the insertion of the fastening bolt and the positive locking of the fastening bolt in its position can be performed more easily and more quickly than in the arrangements according to the prior art.

The object of the invention is achieved by an arrangement for a fiber web machine, which arrangement has: at least two machine elements which are releasably lockable to one another and each have an opening; a bolt disposed between the machine elements and detachably fixed for coupling the machine elements to each other; and locking means for locking the bolt to the selected machine element, where the bolt and the selected machine element form parts opposite to each other. The locking device comprises a locking pin on one of the parts and a stop surface on the opposite part, and is arranged laterally on the bolt in the radial direction. The locking device can lock the bolt on the machine element, so that the bolt can be prevented from accidentally sliding out of the opening of the machine element under various conditions. Furthermore, by means of the solution according to the invention, locking can be achieved without a separate locking device outside the bolt, whereby different types of embodiments can be obtained for the locking device. The fastening bolt is also referred to herein below as a bolt.

For this purpose, the locking pin is preferably designed such that the stop surface is locked by means of a locking pin movement. In this way a mechanical lock can be achieved that is easy to open and close.

Preferably, the device has a guide extending in the axial direction of the bolt for aligning/centering the components of the locking device with respect to each other. The guide means can be used to quickly adapt the detent surfaces of the locking pin and the locking device to one another.

In one embodiment, the locking device has a groove which extends in the axial direction of the bolt and extends on the machine element or on the bolt, which groove enables a relative movement of the locking pin and the stop face. The slot also serves as an air flow path and allows the bolt to be easily inserted into the opening of the machine element. The groove may also have a spiral (ramp), i.e. the bolt may be in rotation during its axial movement.

Preferably, the locking pin has at least one movable locking surface for forming a stop for the stop surface. With such a movable locking surface of the locking pin, the bolt can be locked quickly to achieve a coupling of the machine elements to each other.

In one embodiment, the locking pin is arranged on the bolt and the stop surface is arranged on the machine element. Such stop surfaces, which belong to machine elements, can easily be formed on the surface of the machine element.

Preferably, the bolt has an active surface for pulling the bolt out of the opening of the machine element. By withdrawing the bolt by means of the active surface, the mutual coupling of the machine elements can be released very simply and quickly.

The active surface can be designed for actuating the locking pin. This makes it possible to initially withdraw the bolt out of the opening of the machine element while loosening the locking of the bolt.

In one embodiment, the locking pin is formed by a pivotable joint bolt (hinge bolt) having a locking surface. The swing bolt is a simple and reliable locking device.

The device according to the invention suitably comprises a safety element that prevents the bolt from falling out. The safety element is arranged laterally on the bolt in the radial direction. This makes it possible to reliably prevent the bolt from falling out without a separate structure extending outside the bolt, which would prevent, for example, the replacement of a press fabric (pressbespanung). It is also possible to prevent the bolts from being lost in the device, for example during maintenance.

In one embodiment, the security element is an object disposed in and immobilized with respect to the slot. This makes it possible to touch the safety element against the fixed stop surface and ultimately prevents the screw from falling out.

The active surface and the safety element are preferably at least partially integrated in the locking device. In this way, a simple construction without a separate outer component can be achieved. The locking surface can be brought into a position in which the bolt is locked or into a position in which the bolt is allowed to move by means of the pivotable swing bolt. In the locking position, the locking surface prevents movement of the bolt by means of a stop surface remaining inside the bolt.

In one embodiment, the locking device has a fixed stop surface and a movable locking surface. The fixed stop surface forms a mechanical stop for the movable locking surface, which mechanical stop can prevent the bolt from sliding out of the opening when the locking device is locked.

The pivot bolt preferably has two locking surfaces which are spaced apart from one another and have a width substantially equal to the width of the groove, which locking surfaces form a stop for the stop surface when the pivot bolt is pivoted. For locking the bolt, the swing bolt can expediently only be pivoted downward, wherein the pivoting force can assist in keeping the locking device closed.

With the device according to the invention, it is possible to lock the machine elements to each other, which is simple and quick to operate and prevents accidental detachment of the bolts. The device according to the invention can be implemented without parts projecting outwards from the bolt, such as chains or other corresponding safety elements, so that for example the replacement of the roll belt can be implemented simply and without the need to dismantle parts of the device.

In the device according to the invention, the locking device preferably has a groove and a locking surface, which are formed, for example, on the bolt, and a stop surface, which is provided, for example, on the inner surface of the opening of the machine element. The locking means may also be arranged in the opposite way, i.e. the groove and the locking surface are arranged on the machine element and the stop surface on the bolt. In any case, the detent and the stop surface are located on different parts.

More precisely, the device according to the invention is characterized in that: the locking means are arranged on the side/surface of the bolt in radial direction.

Drawings

The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the invention are shown. Wherein,

FIG. 1a shows a device according to an embodiment of the invention in a locked state as a whole;

FIG. 1b shows the device in an unlocked state overall, according to one embodiment of the present invention;

fig. 2a shows an axonometric drawing as a schematic diagram in the locked state (axotometrische Darstellung) in an embodiment of the device according to the invention;

fig. 2b shows a side view as a schematic diagram in a locked state in an embodiment of the device according to the invention;

fig. 3a shows an isometric view as a schematic representation in an unlocked state in an embodiment of the device according to the invention;

fig. 3b shows a side view as a schematic representation in an unlocked state in an embodiment of the device according to the invention;

fig. 4a shows an isometric view as a schematic representation of the extraction of a screw from a machine element in an embodiment of the device according to the invention;

fig. 4b shows a side view as a schematic representation of the extraction of the screw from the machine element in an embodiment of the device according to the invention;

fig. 5a shows an isometric view as a schematic representation of a bolt when it is completely removed from a machine element in an embodiment of the device according to the invention;

fig. 5b shows a side view as a schematic representation of the screw being completely withdrawn from the machine element in an embodiment of the device according to the invention;

fig. 6 a-6 c show side views as schematic diagrams illustrating the function of a locking device according to an embodiment of the invention.

Detailed Description

Fig. 1a shows in its entirety one embodiment of a device 10 according to the invention. The device 10 comprises at least two machine elements 14 and 16 which are releasably lockable to one another and which have an opening 12, and a bolt 18 which is arranged between the two machine elements and is detachably fixed in order to lock the machine elements 14 and 16 to one another. In this embodiment, the machine element 14 is constituted by the bearing housing 13 of the roll 100. The roll 100 may be a press roll and the roll 200 constitutes a counter roll to the roll 100. The machine element 16 is in this embodiment constituted by a connecting rod by means of which the bearing housings 13 of the roll 100 and the bearing housings 15 of the roll 200 are fixed to each other. The device also includes an active surface fixed to the bolt 18 for extracting the bolt 18 from the opening 12 of the machine elements 14 and 16. The bolt 18 has a further locking device for locking the bolt 18 between the at least two machine elements 14 and 16. The active surface and the locking means of the device according to the invention are better shown in fig. 2 a-4 b.

In the embodiment shown in fig. 1a, maintenance must be performed significantly more frequently for the roll 100 as a press roll than for the roll 200 as a counter roll. Therefore, it is necessary to be able to easily and quickly separate the roller 100 from the roller 200. The machine element 16, which is usually a connecting rod, is permanently arranged on the counter roller, wherein the bolts located between them do not need to be loosened when the press roller is removed. It is also possible to use the device according to the invention for fastening the machine element 16 to the counter roller 200. The device of the invention is in the locked state in fig. 1a, in which the bolt 18 passes through the opening 12 of the machine element 14 as bearing housing and the machine element 16 as connecting rod and locks both. Fig. 1b shows such a situation: the device is opened and the bolt 18 is withdrawn from the opening 12 of the machine element 16 as a connecting rod. In the state as shown in fig. 1b, the roller 100 may be separated from the roller 200 as a counter roller.

Fig. 2a shows an isometric view of a bolt 18 of the device according to the invention, which bolt is separated from the object into which it is to be inserted. In the opening 12 of the machine element 14 shown in fig. 1a and 1b, there are provided mating bushes (Passbuchse)36 and 36' as shown in fig. 2 a. With the use of the mating bushes 36 and 36', the opening 12 of the machine element 14 can be matched to the bolt 18 in a precisely dimensioned manner. The mating bushings 36 and 36' may be made of bronze, for example. Preferably, the first counter-bushing 36 is mounted in an opening of the rear machine element, viewed in the insertion direction of the bolt 18. The second counter-bushing 36' is fitted in the opening of the machine element which is first inserted when the bolt 18 is inserted, and the bolt 18 still projects partially into this opening even in the extracted state. A machine element 16, in this case a connecting rod, as shown in fig. 1a and 1b, is inserted into the space between the two mating bushes. The mating bush is suitably fixed to the machine element by means of a shrink connection. The mating surfaces of the bolts 18 can also be inserted directly into the bearing housing, whereby the device can be constructed without a bushing.

As shown in fig. 2a and 2b, the locking device 24 of the device consists of parts lying opposite one another, namely the bolt 18 and the selected machine element 14, wherein the locking pin 28 of the locking device 24 lies on one of the parts and the stop surface 26 lies radially on the bolt surface on the opposite part. In other words, the detent 28 and the stop surface 26 are provided on different parts.

In a preferred embodiment of the invention, as shown in fig. 2a and 2b, a guide device 29 assigned to the device according to the invention is arranged on the surface 19 of the bolt 18 in the longitudinal direction of the bolt 18. In this embodiment, the guide 29 may be constituted by a groove 30 machined on the surface 19 of the bolt. Two grooves 30 are preferably provided, which are arranged diametrically opposite one another on the bolt 18. The locking pin 28 of the bolt 18 and its operating means may be provided on the end of the mating bush 36' of the slot 30. In this preferred embodiment, the detent 28 is constituted by a swing bolt 34 hinged on the transverse axis of the bolt 18 or a hinge pin provided with a locking surface 42 at the end, as shown in fig. 6 a-6 c. The shaft of the swing bolt 34 is directly engaged on the active surface 20, which in this embodiment is constituted by a handle as operating means.

In one embodiment, the guide means are designed to guide the bolt into the opening of the machine element, for example with a balance to the shape of the bolt or the opening of the machine element, in which case the parts of the locking means do not have a groove.

As shown, the latch 28 may have two locking surfaces 42 with the slot 32 disposed therebetween. The slot 32 may conform to the configuration of the slot 30, i.e., be formed by a recess having a U-shaped cross-section on the surface of the swing bolt 34 that allows the stop surface to move toward the center of the swing bolt 34 as shown in fig. 2a and 2 b. Important for the locking is: the two sides of the slot 32 remain relatively high ridges, i.e. locking faces 42, the height of which in the radial direction of the bolt 18 almost reaches the inner surface of the machine element opening or, in other words, almost corresponds to the depth of the slot 30. The locking surfaces 42 thus form a stop for the movement of the bolt 18 in a manner that is pivotable transversely with respect to the groove 30, since the stop surfaces 26 remain between the locking surfaces 42 in the slot 32 and prevent the bolt, which is fixedly connected to the swing bolt 34, from being displaced. The slot may be open on only one side as shown in the figure, in relation to the slot between the locking surfaces, but may also be open on both sides, which may allow better air flow into the slot. On the other hand, when the flange of the machine element is open on both sides, i.e. the opening extends through the flange, the slot, which is open only on one side, prevents the bolt in the locked state from moving past the stop surface.

In this arrangement, as a counterpart of the locking pin 28, there is a fixed stop face 26, which can be arranged on a mating bush 36'. The stop surface 26 may be formed by any fixed object extending from the inner surface of the mating bushing 36' toward the center point of the opening, which forms a physical stop for the swing bolt 34. The stop surface 26 can preferably consist of a screw or a pin, for example, which extends in the radial direction of the bolt 18 almost to the bottom of the groove 30. Preferably, the stop surface 26 abuts the slot 30 of the bolt 18. The stop surface 26 can also be provided directly on the inner surface of the opening of the machine element, but the opening is first of all dimensioned to correspond to the bolt. The stop surface 26 is preferably arranged on the outer, viewed in the direction of the screw removal, mating sleeve 36', where it also simultaneously acts as a stop for the safety element 22 of the screw 18. The safety element 22 may also be formed by a pin or a physical stop in the radial direction of the bolt, which can be arranged in the groove 30 and prevents the bolt 18 from falling out of the opening 12. It is preferred that the security element 22 is an object that is narrower than the width of the slot because the slot 30 is also the path for the air to flow at the same time. For example in the case shown in fig. 1a and 1b, the opening of the press roll is constituted by a recess/cavity closed at one end, from which opening the air must escape through the slot.

In the locked state of the bolt 18, the slot 32 and the locking surface 42 of the swing bolt 34 are deflected transversely to the direction of the slot 30, as shown in fig. 2a and 2 b. Here, the stop surfaces 26 are located between the locking surfaces 42 within the slot 32, and the portion of the swing bolt located outside the slot 32 prevents the bolt 18 from moving in its longitudinal direction. Suitably, the stop surface 26 acts as a fixed member for a mating bush or machine element and the locking pin is a component hinged to the bolt, but the invention can also be applied: the locking surface is hinged to the machine element, while the stop surface constitutes a fixed member supporting the bolt.

The active surface 20, i.e. the handle shown in fig. 2a, may be provided in a recess 40 on one end of the bolt 18, where the active means is a part that does not protrude from the bolt 18. Preferably, when the swing bolt 34 is in the locked position, the handle is deflected transversely to the longitudinal direction of the bolt. In fig. 3a and 3b, the handle can be folded out in the longitudinal direction of the bolt 18, so that here the slot 32 of the swing bolt 34 is simultaneously brought into the longitudinal direction of the bolt 18 and the locking surface 42 is pivoted laterally of the slot 30. More precisely, the open side of the slot 32 is here deflected towards the slot 30, while the locking surface 42 (fig. 6 a-6 c) is located on the flank of the slot 30, outside the width direction of the slot. In this way, the bolt 18 can be pulled out of the opening of the machine element or the mating bushing 36 by pulling the handle. Preferably, the bolt 18 is not pulled completely out from between the machine elements, but rather it remains partially inserted in the outer mating bush 36', as shown in fig. 5a and 5 b. The stop surface 26 guides the movement of the bolt 18 by means of the slot 30 so that the bolt is extracted linearly (fig. 4 a-5 b). In this embodiment, the safety element 22, which is fixedly arranged in the groove 30 of the bolt 18, follows the bolt 18 until it strikes the stop face 26 and stops the longitudinal movement of the bolt 18. Fig. 4a and 4b show the phase of withdrawing the bolt 18 from the locked state, and fig. 5a and 5b show the phase of withdrawing the bolt 18 as far as possible therefrom, in which the safety element 22 is in contact with the stop surface 26. If the bolt 18 is in the position shown in fig. 5a and 5b, the second machine element 16 shown in fig. 1a and 1b, i.e. the connecting rod, can be extracted from between the flanges of the bearing housing 13, inside which the mating bushes 36 and 36' are located.

The function of the locking means 24 of the device according to the invention is still shown in a simplified manner in fig. 6 a-6 c. Preferably, the locking means comprises a groove 30, a locking pin 28 and a stop surface 26, with which a mechanical locking can be achieved. In this embodiment, the locking bolt 28 is formed by a pivot bolt 34 which is articulated on the bolt 18 and on which the slot 32 is provided between the locking surfaces 42, while the stop surface 26 is formed by a fixing pin or other corresponding projection which is arranged on the machine element. A groove 30 is provided on the surface of the bolt 18, in which groove the stop surface 26 is located. The detent 28 may be disposed on the end of the slot 30. If the bolt 18 is to be locked, it is inserted through the opening into the interior of the machine element and is simultaneously moved toward the stop face 26, wherein the union bolt 34, which is in the AUF position, i.e. deflected by the slot 32 toward the stop face 26, finally strikes the stop face 26. In this phase, the slot 32 of the swing bolt 34 reaches the locking position, i.e. transversely to the direction of the slot 30, by means of the active surface, so that the bolt cannot move in its longitudinal direction. During the extraction of the bolt 18, the safety element fixedly arranged on the bolt, i.e. the pin or the like, touches the stop surface 26 and prevents the bolt 18 from moving. The relative spacing of the locking surface 28 and the safety element 22 is equal to the range of movement of the bolt in its longitudinal direction.

As shown in fig. 6 a-6 c, the slot 30 is wider at the detent 28 than at other portions of the slot 30. The purpose of this is to make the width of the slot 32 between the locking surfaces 42 substantially at least equal to the width of the stop surfaces 26. Thus, the detent 28 itself (i.e., the swing bolt 34 in this case) must be wider than the portion of the slot 30 that is forward of the swing bolt 34. In this context, "width" is understood to be essentially tangential to the surface of the bolt 18, in other words transverse to the slot 30.

The bolt is preferably made as a solid piece made of a metal alloy having the required strength. The width of the slot may be at least 10%, preferably at least 20% greater than the width of the safety element and the stop face, so that air can escape through the slot. The diameter of the bolt may be 50-150 mm, but the size thereof may also be changed according to the purpose of use.

The arrangement according to the invention can be used for any connection to the bearing housings of two rolls in a fiber web machine. A fiber web machine in this context means all machines that need to be used in the production of a fiber web, i.e. the invention can be used not only in actual fiber web machines but also in calenders.

The inventive idea can also be applied in various ways other than those shown in the figures. The detent and stop surfaces may be reversed, as may the position of the slot on the bolt surface. The locking pin can also be movable in the radial direction under its locking action, in which case the stop surface can be constituted by a bare recess on the counter part.

Claims

1. An arrangement (10) for a fiber web machine, having:

at least two machine elements (14, 16) which can be releasably locked to one another and each have an opening (12), and

a bolt (18) which is inserted between the machine elements (14, 16) and is releasably fixed for coupling the machine elements (14, 16) relative to each other, and

a locking device (24) for locking the bolt (18) on a selected machine element (14, 16), wherein the bolt (18) and the selected machine element (14, 16) form parts which are opposite one another, and the locking device (24) comprises a locking pin (28) on one of the parts and a stop surface (26) on the opposite part,

characterized in that the locking device (24) is arranged laterally on the bolt (18) in the radial direction.

2. Device according to claim 1, characterized in that the locking pin (28) is designed to lock the stop surface (26) by means of a movement of the locking pin (28).

3. Device according to claim 1 or 2, characterized in that it has guide means (29) extending in the axial direction of the bolt (18) for aligning/centering the components of the locking means (24) with each other.

4. A device according to any one of claims 1 to 3, characterised in that the locking device (24) has a groove (30) extending in the axial direction of the bolt (18), which groove is provided on a machine element (14, 16) or on the bolt (18) and enables the locking pin (28) or the stop face (26) to be moved relative to one another.

5. Device according to one of claims 1 to 4, characterized in that the locking pin (28) has at least one movable locking surface (42) for forming a stop for the stop surface (26).

6. The device according to any one of claims 1 to 5, characterized in that the locking pin (28) is arranged on the bolt (18) and the stop surface (26) is arranged on the machine element (14).

7. The device as claimed in one of claims 1 to 6, characterized in that the bolt (18) has an active surface (20) for extracting the bolt (18) from the opening (12) of the machine element (14, 16).

8. Device according to claim 6, characterized in that the active surface (20) is used for operating the locking pin (28).

9. Device according to one of claims 5 to 8, characterized in that the locking pin (28) is formed by a pivotable joint bolt (34) having the locking surface (42).

10. The device according to one of claims 1 to 9, characterized in that it has a safety element (22) which prevents the bolt (18) from falling off, the safety element (22) being arranged laterally on the bolt (18) in the radial direction.