FI79727B - OSCILLERINGSMEKANISM FOER STRAOLROERET I EN PAPPERSMASKIN. - Google Patents

Description

79727 ^ Paper machine nozzle oscillation mechanism

The invention relates to an oscillating mechanism for a paper machine nozzle tube through which water jets are applied to the surface of the paper machine to be cleaned, such as a wire or a felt to be cleaned. reciprocating oscillating, and said oscillating mechanism comprises a rotation motor, the shaft of which is connected to said oscillating mechanism, by which the rotational movement of the motor is converted into reciprocating oscillating movement of the reciprocating part of the jet tube.

15

For cleaning paper machine fabrics such as wires and / or blankets, spray tubes are used that extend transversely across the entire width of the fabric. These nozzle tubes have a series of nozzle holes through which high pressure water jets are usually applied to the outer surface of the tissues to clean the tissue. The pressure of the washing water is high, usually about 20-50 bar. The spray tube is oscillated back and forth in its longitudinal direction in order to ensure that the washing effect is not woolly, but is evenly applied over the entire width of the fabric. In general, the oscillation length is equal to the distribution of the wash water spray nozzles in the nozzle tube length direction.

- Nozzle actuators based on either purely mechanical or electromechanical operation are already known. It is known e.g. a cross-screw actuating device in which the mechanism 20 m- [consists of grooves passing through the grid, which are followed alternately by the abutment part. The problem with this solution is the rapid wear of the grooves. Solutions are also known in which the cylinder device is adapted to move the spray tube and in which the reciprocating movement is effected by means of limit switches. The disadvantage of the prior art solution 25 can be considered the susceptibility of the device to failure.

2 79727 1 The object of the invention is to overcome the disadvantages of the jet pipe moving devices according to the prior art. The aim is to move the nozzle, which has room for use despite the harsh operating conditions. The aim is to have a jet tube moving device with a constant speed of movement and a rapid change of direction of movement. The aim is also to have a moving device that is small in size so that it can often fit in very tight spaces.

The object of the invention is to overcome the disadvantages of the device solutions according to the prior art, and the object is to provide a jet tube moving device which has a long service life and which is advantageous in terms of manufacturing costs.

The object of the invention has been achieved by a device solution in which it is realized to use coupling segments with respect to each other in 180 ° phasing, which in turn engage the coupling means associated with the closure tube and give it a movement determined by the direction of rotation of the coupling wheel. When the connection of the second segment stops, the second segment turns on and the direction of movement changes.

20

The nozzle oscillation mechanism according to the invention is mainly characterized in that the wheels are arranged at different points relative to each other on their axles, the wheels being spatially overlapping with respect to each other when viewed from the end of the axles.

25

The invention will now be described with reference to some preferred embodiments of the invention shown in the figures of the accompanying drawings, to which, however, the invention is not intended to be exclusively limited.

Figure 1 shows an overview of a spray tube device according to the invention placed in connection with the tissue to be cleaned.

Figure 2A shows a preferred embodiment of the invention in a polkkl sectional view. The view is a section II-II of Figure 2B.

Figure 2B is a section I-I of Figure 2A.

35 3 79727 1 Figure 3A shows another preferred embodiment of the invention in a cross-sectional view. The view is a section IV-IV of Figure 3B.

Figure 3B shows a section III-III of Figure 3A.

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According to Fig. 1, the spray tube 11 extends in the path direction B of the wire or felt H to be cleaned along the entire width of the fabric H. The nozzle 11 is oscillated by an oscillating mechanism 10 according to the invention. The oscillating mechanism 10 comprises a unidirectionally rotating motor 17, preferably an electric motor, e.g. a short-circuit motor. This rotational movement is converted into a reciprocating (arrow A) oscillating movement of the spray tube 11 by a mechanism according to the invention, which will be described in more detail later. On the upper side of the spray tube 11 there are nozzles S in an even distribution, through which strong needle-like water jets are directed to the outer and lower surface of the tissue H 15. The shower tube 11 is attached to the upper side of the horizontal housing beam 11b by handles 11c. The housing beam 11b is supported and mounted on the forks of the vertical beams 1 Id on the horizontal rollers 11f or the like therein. With the oscillating mechanism, i.e. the sliding platform 10, the spray tube 11 can be oscillated with the movable body portion 10b of the oscillating mechanism 10 attached to the movable horizontal beam 11b and the fixed body portion 10a of the oscillating mechanism connected to the fixed vertical beam 11d. The back and forth oscillation distance L provided by the sliding pad 10 is preferably equal to the mutual distribution of the nozzles S.

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Wash water is introduced into the tube in the direction of arrow 11 through the hose W suunnnassa. The water passes through the spray pipe 11 and exits from the jet pipe at the opposite end of the arrow W direction.

out 30 Figure 2A shows a nozzle moving mechanism according to the invention, i.e. a nozzle oscillation mechanism 10. The nozzle is adapted to be moved a distance of about 300 mm and this movement is performed by oscillations. The reciprocating linear motion requires a force of about 1200 N. The maximum resistance to movement is caused by the load on the bearing-35 caused by the support beam of the spray pipe. As shown in Fig. 2A, the movable part 10b of the oscillation mechanism 10 of the spray tube 11 is associated with coupling means 12, preferably a rack. It is adapted to operatively engage 4 79727 1, as shown in the embodiment of Figure 2A, via the intermediate wheel 23 of the shaft 22 alternately with the first wheel 13 and the second wheel 15.

The first wheel 13 is located on the first shaft 18. The second wheel 5 15 is located on the second shaft 20. The wheels 13 and 15 are located at different points on their shafts, thus providing interleaving and space for these wheels to engage the wheel 23 of the third shaft 22.

The first wheel 13 comprises first coupling means 14 and, correspondingly, the second wheel 15 comprises second coupling means 16. As shown in Figures 2A and 2B, said coupling means are coupling segments up to 180 ° and preferably gear tooth segments.

The unidirectionally rotating drive motor 17 is adapted to rotate 15 a first shaft 18, which at its second end comprises a drive wheel 19. Said second drive wheel, as shown in the embodiment of the figure, is adapted to rotate the second shaft 20 when engaging its gear 21.

When the drive motor 17 rotates the first shaft 18, the rotation passes through the coupling means 19 and 21 to the second shaft 20. Thus, the wheel 13 of the first shaft and the wheel 15 of the second shaft 20 rotate in opposite directions.

In this embodiment, the apparatus further comprises a third shaft 22 located above the first shaft 18 and the second shaft 20. The third axis 22 is thus located with respect to the above-mentioned axes such that the lines drawn through the centers of the axes form an isosceles triangle.

30

On the third shaft 22 there is a drive wheel 23, in the embodiment of Fig. 2A, 2B a gear wheel.

The first wheel 13 and the second wheel 15 are arranged on the first shaft 18 and the second shaft 20 of the device 35 so that the coupling means 14 and 16 in the first wheel 13 and the second wheel 15 are in 180 ° phasing with respect to each other. This means that when the first wheel 13 is operatively connected to the counter-coupling means 12 of the spray tube 11 via the drive wheel 23 of the third shaft 22, the second wheel 15 with coupling means 16 is operatively disengaged from said coupling means 12 of said spray tube 11 oscillation mechanism. 13 and its coupling means 14 come into contact with the drive wheel 23 of the third shaft 22, preferably the gear, the coupling means 16 of the second wheel 15 coming off contact with said gear 23.

In the step shown in Fig. 2A, the first wheel 13 begins to rotate the drive wheel 23. The drive wheel 23 is further operatively coupled to the rack 12. The gear 23 engages the rack 12 and linearly moves the nozzle 11. In this operation, the direction of rotation of the first wheel 13 determines the direction of the nozzle 11. 15 shown in the wheel 13 rotates in the direction of the arrow moves in the jet pipe in Figure IA, shown in the direction of arrow L ^ 'direction linearly.

When the first wheel 13 has rotated by an angle of about 180 ° and the coupling means 14 of the first wheel 13 have disengaged from the wheel 23, the coupling means 16 of the second wheel 15 engage the drive wheel 23 of the shaft 22. The tooth segment 16 of the second wheel 15 engages the teeth 22 of the shaft 22 and determines the direction of rotation of the wheel 23 and thus the linear direction of movement of the spray tube 11. The direction of movement of the spray tube 11 thus changes. As the gear 15 rotates in the direction 25 indicated by the arrow, the nozzle tube 11 moves in the direction indicated by the arrow '.

With respect to the direction of movement of the gear segments 14 and 16, the first tooth is lowered. This measure allows for a flexible change of business direction. This prevents the wheels 13 and 15 from locking.

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Fig. 2B is a structure according to Fig. 2A taken along section line I-I of Fig. 2A. In the figure, the central axes of the first, second and third axes and X 1 are marked. The first, second and third shafts are mounted for rotation on a bearing roller 24. The bearing 35 is performed on the housing body 25 of the device 10. The end of the first shaft 18 is connected to a drive motor 17. The drive motor 17 may be e.g. an electric motor.

The support rollers 26 are adapted to support the body part 10b of the moving device 10 of the spray pipe 11. Said rollers 26 act as bearing parts guiding the shower tube 11 in its linear motion.

Figures 3A and 3B show another embodiment of the invention. In this embodiment of the figure, the tooth segments of the first wheel 13 and the second wheel 15 have been replaced by friction coupling means 140 and 160. These coupling segments 140, 160 in the wheels 13 and 18 are phased about 180 ° relative to each other. The segment surfaces 140 and 160 rise from the rest of the surface of the wheels 10 13 and 14, so that the coupling event of the wheels 13 and 14 is similar to that of the first embodiment of Figs. 2A, 2B. Correspondingly, in this embodiment of the figure, the third wheel 23 is also formed as a friction wheel, the surface being formed of e.g. a flexible material. Thus, the coupling means 12 of the movable body 10b 15 of the jet tube moving device 11 are also formed as friction coupling means and comprise a flexible coupling surface.

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Claims (4)

1. Oscillating mechanism (10) for the jet tube (11) in a paper machine, through which jet tube (11) directs water jets on a surface of a tissue to be purified, such as a wire or felt, which jet tube Mr associated with the oscillating mechanism (10) , with which the jet tube (11) is arranged to oscillate back and forth (A) in its longitudinal direction, most preferably in the transverse direction of the tissue to be purified, and which oscillating mechanism (10) comprises a rotary motor (17) whose shaft 10 is joined to said an oscillating mechanism (10), by which the rotational movement of the motor (17) is changed to a reciprocating oscillating motion of the portion (10b) which drives the jet (11) back and forth in such a way that the driving motor (17) is arranged to cause a first shaft (18) to rotate, from which first shaft (18) is transmitted rotation via coupling tool (19,21) to a second shaft (20) and in which device the first shaft (18) comprises a first wheel (13); 130) and therein an approximately 180 ° The clutch segments (14; 140) and the second shaft (20) comprise a second wheel (15) and therein also an approximately 180 ° clutch segment C16; 160) which clutch segments (14; 140; 16; 160) are provided. 20 is alternately coupled to the coupling tools via a wheel (23) on a third shaft (22) in the movable body part (10b) of the oscillating mechanism (10) of the jet tube (11), characterized in that the wheels (13 and 15) are arranged at different the seats in relation to each other on their shafts (18, 20), the wheels (13 and 15) seen from the end of the shafts (18, 20) overlapping each other in a space-saving manner. 1 Patent claim 2. A displacement device for a jet tube according to claim 1, characterized in that the coupling segment (14) of the first wheel (13) consists of a gear segment and, correspondingly, the coupling segment (16) of the second wheel (15) consists of a gear segment and that said gear segments (14, 16) are arranged to be alternately coupled to the counterclocking tools (12) of the jet tube (11), which consist of a toothed bar or which coupling segments Mr arranged to rotate the gear (23) of the third shaft (22); which (23) is further coupled to the coupling tools (12) of the body part (10b) of the moving device (10), advantageously to the rack. 10 79727 3. A displacement device for the beam according to claim 1, characterized in that the coupling segments (14, 16) consist of friction coupling tools, which are either directly connected to the coupling tools (12) for the movable body part (10b) of the beam arrangement (12). friction coupling tool or coupled to the friction wheel (23) of the third shaft (22), which (23) is further coupled to the coupling tools (12) for the movable body part (10b) of the jet tube displacement device, which coupling tools (12) are friction coupling tools. 10 4. The displacement device for the beam according to claim 2, characterized in that the first tooth is made lower in the relative direction of movement of the tooth segments (14, 16), whereby a flexible change of the direction of movement of the beam (11) is carried out. > 20 25 30 35