SU1676650A1 - Device for grinding materials - Google Patents

Abstract

The invention provides for the restoration of the operability of the grinding rolls under operating conditions in case of a break in the helix of the teeth of the disks and a reduction in energy consumption. The device for grinding materials comprises a frame mounted on it in bearing supports 2 parallel to each other grinding rolls 3.4 with individual drives 5.6. Each roll 3 (4) contains a shaft 7 (8), one end of which is provided with a stop ring 9 (10) and 11 (12) are rigidly fixed on it. On the shafts 7.8, there are freely mounted toothed disks 13 separated by distance sleeves 14, The teeth 15 of the disk 13 are located along the shaft 7 (8) along a helical line 16. Opposite from the stop ring 9 (10), the end of the shaft 7 (8) is provided with an internal thread into which the I8 (i9) shank is screwed, the free ends of which have slots bearing on itself moving gear 21 (22). The shanks 18 and 19 are fitted with rigidly mounted rings and have openings on the outer surface 24. Ned movable gears 21,22 switches 25,26 are installed. In the electrical circuit of the stator of each drive 5,6 included current relay. The device can work from one drive when grinding fine materials. 3 il.

Description

The invention relates to equipment for the production of chips from wood raw materials - branches, tops of logs, branches, pickling, various lengths of wood processing and logs, and also wood, and can be used in forest, pulp and paper, wood chemical and fuel industries. national households.

The purpose of the invention is to ensure the recovery of the rolls' operability under operating conditions when the helix of the teeth of the discs is violated and energy consumption is reduced.

FIG. a device for grinding materials, a plan is shown; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one.

The device for grinding materials comprises a frame 1 mounted on it in bearing supports 2 parallel to each other grinding rolls 3.4 with an individual drive 5.6. Each grinding roller 3 and 4 contains a shaft, respectively, 7 and 8, one end of which is provided with a stop ring 9 and 10 and gears 11 and 12 are rigidly fixed on it. On the shafts 7, 8 there are freely mounted toothed discs 13, which are separated by distance sleeves 14. Tooth 15 toothed disks 13 are located along the shaft along a helical line 16. Opposite from the stop

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The thrust rings 9 and 10 of the shaft 7 and 8 are provided with an internal thread 17, into which the shanks 18 and 19 are screwed. The free ends of the shanks 18 and 19 have slots 20 that carry 18.19 relative to the shanks 18.19 gears 21,22. Shanks 18, 19 are fitted with rigidly mounted rings 23 (with a diameter D) and have a perimeter hole 24 in the perimeter 24. Switches 25 and 26 are installed above the movable gears 21 and 22 to move these gears 21 and 22 from one position to another. The stator circuitry of each drive 5 and 6 includes a current relay (not shown), which is adjusted for the amount of current that allows the drive 5 and 6 to automatically turn off when the disks 13 and bushings 14 are fully tightened.

Restoration of the grinding rolls (installation) is performed as follows.

Consider first mounting the chopping roller 3. In the initial position, the movable gear 21 is in position | , and gear 22 - in position II. After installation on the shaft 7, close to the stop ring 9, the gear discs 13 and the spacer bushings 14 on, the thread

17, the shank 18 is screwed in and the 7 elements assembled on the shaft are pre-tightened. For this, a special lever (not shown) is inserted alternately into the holes 24 and by turning the shank 18 clockwise, it is pushed on the shaft 7, and the shank 18 moving along the shaft towards the retaining ring 9 with its ring 23 at the expense of the gap H presses the outermost disk 27 and compresses all the gear disks 13 mounted on the shaft 7 and the spacers 14.

Then the final tightening of the disks 13 and the sleeves 14 is carried out to a stressed state. For this purpose, the switch 25 moves the movable gear 21 from position I to size h to position P (engages gear 12) and turns on both drives 5 and 6 with rotation of both rolls 3,4 in one direction, counterclockwise. The movable gear 21 and the gear 12 interact with each other (the teeth of both gears rotate towards each other) and completely brake against rotation. At the same time, the shaft 7, rotating with its thread 17, moves the shank 18 along the shaft 7, and the toothed disks 13 and spacers 14 is finally clamped to a stressful state between the ring 9 of the shaft 7 and the ring 23 of the hitch 18 Vapok3 is ready for operation. Switching off the drives F and b is performed automatically by the current relay. To remove the toothed disks 13 and the sleeves 14 from the roll, both drives 5 and 6 must be turned on for reverse (clockwise rotation).

arrow), their tension will weaken, and the shank 18 will come off the thread 17 of the shaft 7.

The assembly of the chopping roller 4 is carried out in the same sequence, but the gear 22 is inserted into engagement with the gear 11, which from position III becomes position IV.

A device for grinding materials operates as follows.

The operation of the proposed device can be performed in two modes.

The first mode is the grinding of fine materials. One of the drives 5 and 6 turns on. If the drive 5 is turned on, the moving gear /; t from position I becomes

to position H, and if the drive is 6, then the movable gear 22 from position 111 is set to position IV. Thus, the grinding rolls are rotated by means of the gears

each other when turning on one of the two drives 5.6.

The second mode of operation - the grinding of large materials

In the initial position, the movable gear 21 is in position I, and the movable gear 22 is in position IJJ. Both drives 5,6 are turned on with rotation of the chopping rolls 3.4 towards each other

friend and grinding materials.

Thus, making the device shaft integral — with a shank and a movable gear — allows

restore the operability of the grinding rolls under operating conditions. This makes it possible to ensure the productive operation of the device without completing it with backup rollers and thereby

reduce capital investment and reduce production costs.

It is also important that the installation and dismantling of the grinding rolls of the proposed device eliminates the need for special lifting and transport equipment, which also positively affects the cost. In addition, the ability to operate the device with one drive turned on from the two drives available (even if one drive fails) will reduce power consumption, increase reliability and increase the service life.

Claims (2)

The invention of the Device for grinding materials, containing the frame and mounted on it in the bearing supports parallel to each other grinding rolls, each of which has a drive shaft with toothed discs, spaced bushings between them and the stop ring at its end, while the teeth of the disks are arranged along screw lines whose axis coincides with the axis of the shaft, and the stop rings are located at opposite ends of the shafts, characterized in that, in order to ensure the restoration of working capacity J 12 0 rolls in the conditions of operation when the helix of the teeth of the discs and energy consumption decrease, each shaft is provided with a gear rigidly fixed in front of the stop ring, and not the opposite end with an axially movable shaft, which is equipped with an axle-mounted gear and fixed on the frame by a switch of the position of this gear, which periodically interacts with the gear fixed on the shaft of the other roll. 8 tt (Rig 27 1922, S 2.b sh L 25 18 23 24 27 W P / J Schi 2 eleven 5-6 fws