SU44121A1 - Sucking gauchval papermaking and cardboard machines and prespatov - Google Patents

Description

IN MANY modern paper machines (A conventional gauch press is replaced by a suction roll due to its advantages over a conventional gauch press, which mainly consist in the absence of crushing of the paper web that occurs on a conventional gauch press when making fatty papers, in the absence of a top shaft with a stocking and a scraper, in the best dewatering of paper mass, in lengthening the service life of the net, in reducing rejects when filling paper and in the possibility of a significant increase in the speed of the machine.

The principle of operation of the suction gauch is that the dewatering of the paper web during its movement does not occur from squeezing water between two shafts of a conventional gauch press by pressing the upper shaft with weights, but by sucking it through a chamber inside the rotating perforated drum and working under vacuum.

The chamber is connected by pipeline to

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with a vacuum pump, and in its open upper part it ends with gaskets made of rubberized fabric and, in order to avoid damage to the inner surface of the perforated drum and the air inlet, is pressed against the inner surface of the drum.

A rubberized roller is placed above the suction area, "which makes pressure on the paper web only with its own weight, squeezes it more tightly, and thereby reduces the need for high vacuum, ensures that the moisture of the canvas is excessive.

The holey drum of the suction camshaft is the lead for the mesh that bends around it.

Due to the vacuum in the chamber and the iodine pressure of the atmosphere of the paper on the paper, moisture from the latter, lying on top of the moving mesh, with the air enters the chamber; from where it is sucked by the pump.

There are many different systems.

The shafts, and the most common ones for paper machines are the foreign constructions of Milspo, Belloit and Donyungton. The existing design of the suction rolls during their expiration 1n installation have several disadvantages. The main drawbacks of some constructions are: 1} inconvenient and long mesh change caused by special devices for hanging the shaft and donning the mesh, since the shaft does not have a self-contained attachment for hanging, and the large dimensions of the front side supports make it difficult to put on, which increases the downtime of the machine and creates the danger of grid damage; 2) uncomfortable p, drive shaft gears, requiring great accuracy when installing them; inaccurate installation of gears leads to a split drum; in addition, the replacement of a worn gear wheel is difficult; 3) uneven ienos bandage rings and difficult to replace them; 4) the unstable position of the shaft from the tension of the grid, which leads to rapid wear of the thrust devices, creates an uneven operation of it, increasing the breaks in the paper web, and increases the waste of paper; 5) significant weight due to the bulkiness of the bed; The disadvantages of other designs are: 1) the complex diameter of the casting chamber is heavy, and the complex structure of the clamping of the chamber seal, which does not ensure air leakage, is equally complex; 2) it is difficult to disassemble and assemble the shaft, as well as inconvenient extraction of the suction chamber from the drum because there is only one roller, as a result of which the chamber has an extremely unstable position when rolling it out and rolling it into the drum, causing it to break in the event of overturning and damage to the internal ground surface of the drum, and difficulty in installing the rear bearing in the bore of the tail; 3) the closed shaft structure from the front side, which contributes to

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- to the accumulation of dirt inside the shaft, does not prevent its removal without disassembling it, not allowing inspection of the inner surface of the drum and the inner parts of the shaft during its operation, and increases the idle time when replacing worn parts. In PredLa, ha; the design of the suction gauge shaft, these drawbacks are eliminated, resulting in the possibility of simplifying the structure, reducing the weight of its parts (which entails less metal consumption and easier disassembly and assembly), simplifying the manufacture of an iron welded chamber instead of cast , reducing time when replacing wear parts, accessing the shaft inspection without disassembling it for timely removal of accumulated dirt and monitoring its operation, reliable and simple sealing between the chamber and the inside enney ,, drum surface makes it impossible to air sucking, adjust the paper size in the course maschiny the one front side. The presence of two pairs of rollers in the chamber, lined with rubber, gives a stable position of the chamber when rolling out and rolling into the drum and provides the inner surface of the drum from damage. The support of the front side of the shaft has a small size and a round shape without protruding parts, which is very convenient when wearing the mesh. The shaft has an independent hanging that does not require special tools for its implementation, which reduces downtime. Reliable design of the pressure chamber from the drive side, providing a vacuum, makes it possible to adjust it during the running of the machine from the side of the backing. The proposed structure consists (firm 1) of a bronze cast perforated hollow cylinder 1, ground from the outer and inner surfaces, rigidly bolted to the tail part 2, which represents. by yourself; steel casting, with which the shaft is driven by a flexible coupling. The drum from the front side lies in a special roller bearing 78 and

its body 76 has a special tide with a babbitt fill for the turning part.

The bearing housing 76 (Figs. 1, 2) is attached with two bolts to the removable plate 61, bolted to the front plate 60, and the latter is also bolted to the tires of the machine.

On the drive side, the suction shaft with its tail part 2 (Fig. 1) also lies in a special roller bearing 120 ,. the casing of which 115 lies in the semiring 114 and is fixed in it with the help of a pin 139.

The half ring 114 is bolted to the rear plate 113, and the latter is likewise attached to the tires of the machine.

The covers 77 and 116 of the roller substations 78 and 120 in their upper part have tides with grooves for mounting a squeezed rubberized roller, not shown in the drawing. The bearing 78 from the front side is mounted on the grinding of the drum 1 and is fixed on it with the help of two: half-rings 80 rolled by bolts, cutting their inside into the drum. To protect the bearing from getting dirt and water on the drum 1 roll maze rings 79, which with their protrusions enter the annular housing of the housing and the cover of the roller bearing 78. To better guarantee the protection of the bearing from Dirt and water in its upper part over the rings 79 the safety flaps 81 are reinforced. The roller bearing 78 is lubricated by two two lubricators 124 with balls screwed into the cover 77.

On the drive side, the roller bearing 120 is mounted on the sharpening of the tail part 2 and the inner ring of its crets with the help of two semi-rings 119 which are bolted together, embedded in the tail part 2 and the rings .118. The outer colpo of the roller bearing 120 in the housing 115 is secured by a cover 121.

The roller bearing 120 is lubricated with a G24 oiler with a ball screwed into the bearing cover 116.

To protect roller roller 120 from falling into it of dirt and water from the side of the drum, there is a labyrinth seal consisting of

ring 123, the protrusion of which is included in the recess of the cover 121; in addition, two springy bronze rings 122 are placed in the recesses of the ring 123.

On the drive side of the seal, the roller bearing 120 is achieved by means of two bronze spring rings 117 placed in the recesses of the ring 118.

The inner surface of the drum 1 (Figs 1, 4) is pressed by its closed loop, terminated by rubberized rubber seals 54, the suction chamber 4, which has an open end on the front side through the elbow 12, a flexible reinforced hose 13 and the pipe 15 is piped to vacuum - pump not shown in the drawing.

The camera is clamped using two springs 71 (FIG. 2) on the side and the same two springs 90 (FIG. 4, 1): On the drive side.

On the front side, the bolts 69 (Fig. 2) of the springs 71 terminate in rectangular heads that are included in the recesses of the guide chamber. The springs 71 are each placed between the lower washers 72 and the upper washers 70.

On top of the upper washers 70 on the bolts 69 there are nuts, with the help of which the pressure of the springs is adjusted, turn these nuts with a wrench. The bottom / washers 72 have protrusions that fit into the grooves of the lower swivel part 67, bolted to the upper swivel part 66, which serves as a guide for the suction chamber 4. The lower swivel part 67 (Fig. 1 and 2) and the upper 66 the parts have an annular protrusion that is included in the undercut of the tide of the housing 76, and from above it is covered with a half ring 73, which is bolted to the latter. The camera is rotated to the required angle by means of a bolt 83 (Fig. 2), hinged at one end to the lower hinge part 67, passing through a special guide 85, hinged at the tide of the body 76.

To rotate the camera 4 to the required angle, you must first loosen the bolts of the half ring 73 and then tighten the nuts placed on the bolt 83. To allow the camera to easily turn to the required angle of the half ring 7S (Fig. 1, 2) and the projection of the housing 76 have a babbit fill with an annular recess for turning part. The camera 4 is clamped from the drive side by means of a screw 95 (Fig. 4), which is wound with worm wheels 96 placed in a box 87, hollowed to the camera 4 (Fig. 1) from the drive side. The bolts 92 (Fig. 4, 1) of the springs 90 are fastened in the spade portion 97 so that they can rotate around their parts. The spatulate part 97 has a bore that is put on the spindle 100, which lies in two roller bearings fixed in a special body 109 inserted into the bore of the tail part 2 and fixed in it by a washer 101. The spindle 100 roller bearings are lubricated through the channel in the tail part 2, which is the limits of the roller bearing 120. The lubrication along the specified channel enters the space between the housing 109 and the tail part 2, from where it passes through the holes in the housing 109 to the roller bearings. The spade portion 97 has guides on the box 87 and, when the chamber rolls out, sleeps from the spindle 109, remains connected to the carton 87. The bolts 92 fastened in the spatulate portion 97 pass through the hubs of the worm wheels 96 and have keyways. The wheels are reinforced with special keys 93, with the help of which the wheels can move along the bolts 92. Pressing the springs SO on the drive side is done by turning the handwheel 31, which is extended to the service side and connected by a pull 140 with a screw 95, with. rotation: which the balts 92 rotate, and the special nuts 91, which serve as the bottom support for the springs, will have translational movement and increase or decrease the pressure of the spring 90 depending on which direction the handwheel 31 rotates. washers 88, and the latter, fixed in box 87, into bolts, which serve for preliminary adjustment of spring pressure, as well as for removing springs from box 87 when disassembling the structure, for which these bolts are unscrewed until spring 90 is open. so that they can easily be taken out of the box 87. The paper web is made by moving the end sealing rubber 42 mounted on the suction chamber 4. by means of handwheels 31, which are extended to the service side. harvested into special nuts 40, through which the running screws with appropriate thread pass, connected with handwheels 31. Not on the front side are connected to W with handwheels 31, and the driving nint 27 of the end seal on the drive side is connected to the handwheel 31 by t g 37 and 36 and two Hooke hinges 34 and 35. two pairs of rollers 23 (Fig. 3, 1), covered with rubber, are attached to its lower part in order not to damage the inner ground surface of drum 1 when rolling out and rolling the chamber . .I some distance from the inner surface of the drum 1. The ribs S and 8 and a number of transverse ribs 6 are welded to it along the entire length of the vacuum building. At the beginning of work, the water die 55 is attached to the chamber 4 along the entire length. To transfer a paper tape with The suction cushion shaft on the cloth of the first press also attaches an air filling tube to chamber 4, connected by a flexible hose 142 (FIG. 2) to a compressed air line. When loading paper, i.e. transferring the paper tape to the dry top. The upper part of the spring 90 Adjusting the suction of the chamber 4 in a wide manner. Adjusting the mechanical seals 42 Sealing end seals 42 the back screw 26 of the mechanical seal for unrolling the suction chamber 4 When the shaft is running, the rollers 23 stand In order to stiffen the chamber 4. To flush the drum 1 and for the owl press, open the tap of the rubber hose 142 and a jet of compressed air passing through the openings of the drum 1, the paper tape is thrown over the first press, after which the tap shnogo hose shut.

When the net is put on, the knee 12 is removed (Fig. 1) and the nozzle 15, which are removed together with the flexible one; hose 13, cn and pre-handwheel 31; then the rubber hoses of the shower 58 are disconnected (Fig. 2, 1) and the airborne air 142, then the removable plate 61 is removed from the bearing housing 76 and from the front plate 60, the finger 74 is inserted into the tide on the half ring 73; In the corresponding cutout on the drum 1, the pressure plate is pressed with the method 136 on the tail part 2 until it is possible to easily remove the removable plate 61, which is removed, and the grid is put on the output shaft.

When the net is worn, the assembly is performed in the reverse order of the indicated operations.

In order for the removable plate 61, and therefore the suction shaft, to be precisely positioned in place, the removable plate 61 has top and bottom guide pins that fit into the corresponding grooves on the bearing housing 76 and the front plate 60 and also rests in the limited, reinforced bar 65 on it.

When changing rubber seals 54 (Fig. 4), as well as when repairing, the suction shaft is disassembled in the following order: knee 12 (Fig. 1, 2) and pipe 15 are removed, which are removed together with the flexible hose 13, c, preliminarily the handwheel 31, disconnect the rubber hoses of the drop-off 58 and the air filling 142, then loosen the bolts of the half-ring 73 and install the chamber 4 in a vertical position using the bolt 83, then clamp the bolts of the half-ring 73, press the bolts 68 placed in the upper swivel part 66 to camera 4 on the front side d Since the holes at the ends of the bolts 69. the springs 71 do not coincide with the holes of the lower washer 74, they are inserted into the indicated screw holes, lift the chamber 4, unscrew the bolts 68, at the ends of which the washers 28 are fastened, which grab the brackets 143, attached to the camera, 4, remove the springs 71, lower the camera with the help of bolts 68 until its rollers 23 from the front side are on the inner surface of the drum 1, the handwheel 31 of screw 95 is rotated (FIG. 4) until it fails so that the box 87 is pressed against the lateral part 97, the half ring 73 is removed and removed (Fig. 1, 2), the bolts of the brackets 143 are loosened and they are folded back. When this disassembly is completed, the upper rotary part 66 is kicked off from the lower rotary part 67, the upper rotary part 66 is removed and the suction chamber 4 is pulled out, and as the camrra 4 is pulled out, the spade portion 97 bore and the rollers 23 slide along the conical part of the spindle 100, and the rollers 23 are driven The sides smoothly descend onto the inner surface of the drum, then the lower rotary part 67 is removed and the chamber is pulled out. The rest of the shaft parts are disassembled in the usual way.

The assembly of the suction roll is performed in the reverse order of these operations.

The proposed device has the following advantages:

1) a significant reduction in the overall dimensions of the shaft along the façade, which wraps the netting in and eliminates the use of heavy and expensive special rollers for bands of chromium-nickel steel while maintaining the principle of hanging the shaft with the front side open and convenient for maintenance;

2) elimination of seals for places of passage through the end walls of the chamber due to the withdrawal of traction for adjusting the drainage of the tail part from the limits of the rarefied space;

3) elimination of damage to the inner surface of the drum by rollers by using as supports for inserting and rolling out the chamber of two pairs of cut rollers rolling along the inner surface of the drum, and excluding the possibility of tilting the chamber. The subject matter of the invention. Modification of paper-carting and cardboard machines and pressing equipment suction cups. According to the author's certificate No. 41836, characterized by the use of: a) spindle 100 in order to achieve a smooth roll-out of the vacuum chamber from the shaft drum and to return the exact position in the working position / ff., F two roller bearings mounted in housing 109 inserted into the bore of the tail part 2 and fixed therein by washer 101, b) roller bearings 78 (from the front) and 120 (from the driving sides) instead of retaining rings and support rollers with a LEW shape nor are the dimensions from the end parts of the shaft approaching in outline to the circle (Figs. 1, 2, 3, 4). ®