RU2365695C1 - Tackle - Google Patents

Abstract

FIELD: textile; paper.

SUBSTANCE: invention relates to tackles of disk mills and used in paper-and-pulp industry on the stage of small grinding. The device contains rotor and stator disks on the working surface of which curvilineal knife ridges are equally spaced. A step between cutting edges, thickness of the knife ridges and width of grooves between knives from inlet circular edge of the disk to outlet one have constant value.

EFFECT: increase of linear cutting edge and total length of second is provided due to providing compact distribution of maximum quantity of knife ridges on the circular grinding surface of the disk that increases efficiency and intensification of force impact on treated material and reduces energy consumption.

1 dwg

Description

The invention relates to grinding sets of disk mills and can be used in the pulp and paper industry at the stage of fine grinding.

Known grinding headset disk mill, including a rotor and stator disks, equipped with straight knives, alternating with through mezhnevyh grooves [1].

A device for grinding materials, comprising two paired discs, one of which is stationary and the other mounted rotatably, on the working surfaces of which radial spiral projections are evenly distributed [2].

The disadvantage of these devices is the inability to ensure absolutely tight distribution of the knife protrusions on the annular working surface while maintaining the equality of the thickness of the knives and the width of the inter-knife grooves along their entire length.

The closest in technical essence to the known solution is a grinding set, including rotor and stator disks, on the working surfaces of which are circular knife protrusions evenly distributed [3].

The disadvantage of this device is the inability to ensure absolutely tight distribution of the knife protrusions on the annular working surface while maintaining the equality of the thickness of the knives and the width of the inter-knife grooves along their entire length.

The invention solves the problem of intensifying the force effect on the processed material, increasing productivity and reducing energy consumption.

The technical result consists in increasing the intensification of the force effect on the material being processed by increasing the total and second lengths of the cutting edges due to the possibility of absolutely tight distribution of the maximum number of knife protrusions on the annular grinding surface of the disk.

To ensure the specified technical result in a grinding set, including rotor and stator disks, on the working surfaces of which the curved knife protrusions are evenly distributed, according to the invention, the step between the cutting edges, the thickness of the knife protrusions and the width of the intercutaneous grooves from the input circumferential edge of the disk to the output circumferential edge are made constant quantities.

The drawing shows a frontal projection of the working knife surface of the grinding headset. Working knife surfaces are shaded.

The grinding set has rotor and stator disks, an annular grinding zone, which is equipped with knife protrusions 1 with cutting edges 2, alternating with inter-knife grooves 3, extended from the input circumferential edge 4 to the output peripheral edge 5. The step between the cutting edges 2, the thickness of the knife protrusions 1 and inter-knife grooves 3 are made constant from the input circumferential edge 4 to the output peripheral edge 5

Grinding headset works as follows. Torque from the drive is transmitted to the shaft and to the rotor disk mounted on its leading end. The fibrous semi-finished product in the form of a suspension under pressure enters through the inlet of the stator disk into the inter-knife cavity, where it is distributed along the inter-knife grooves 3 and rushes under the action of centrifugal force towards the output circumferential edge 5. When passing the working annular cavity formed by the grinding surfaces of the disks of the fixed stator and the rotating rotor, fibrous material is subjected to more intense action than in known devices [1, 2, 3]. This is due to the increase in the total and second length of the cutting edges 2 due to the absolutely tight distribution of the maximum number of knife protrusions 1 on the annular grinding surface of the disk. The processed fibrous prefabricated product is sent to the next stage of the technological process.

Using the proposed grinding headset will allow:

- to intensify the force effect on the processed material by increasing the total, second length of the cutting edges and the number of knife protrusions on the annular working surface;

- increase productivity by reducing the number of cycles;

- reduce specific energy consumption by reducing grinding time.

Information sources

1. V.F. Pashinsky. ″ Machines for grinding pulp ″. "Forest industry", M., 1972, p. 81.

2. SU, No. 967555, IPC B02C 7/08, announced 10.06.1981, bulletin No. 39, published on 10.23.1982.

3. RU, No. 2307883, IPC D21D 1/30, B02C 7/12, announced April 3, 2006, bulletin No. 28, published October 10, 2007.

Claims (1)

Grinding headset, including rotor and stator disks, on the working surfaces of which curved knife protrusions are evenly distributed, characterized in that the step between the cutting edges, the thickness of the knife protrusions and the width of the inter-knife grooves from the input circumferential edge of the disk to the output are made constant.

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