RU2234373C1 - Dynamic self-grinding mill - Google Patents

Abstract

FIELD: crushing and concentration equipment.

SUBSTANCE: mill has casing incorporating shaft, bowl-shaped rotor with radial ribs, screening surfaces, detachable and upper rings, charging branch pipe, cover, funnel, discharge trough, screw jacks, bearing units and V-belt transmission pulley. Mill is equipped with closing kinematic mechanism including gears fixed in upper and lower parts of rotor shaft and engageable with gears, which are arranged axially with respect to one another, and loading device using closed circuit power created by loading, within material torque elastic deformation limits, of shaft with moment equal to moment causing material destruction.

EFFECT: reduced power consumption.

1 dwg

Description

The invention relates to crushing and processing equipment used in the construction materials industry, mining, chemical and metallurgical industries.

Known cone crusher, comprising: a base, an internal crushing cone and covering the outer cone, a drive with a drive ring. (SU 1592033 A1, 09/15/1990, 2 pp.)

This crusher has a number of disadvantages, the main of which are significant energy consumption for crushing and low productivity. These shortcomings are caused by the crushing process itself and the fact that to synchronize the speeds of the cones, a certain period of time is required associated with giving the shoes a certain centrifugal force to overcome the reaction force of the springs, while the crushed material experiences minor effects from the lining.

The invention closest in technical essence is a dynamic self-grinding mill containing a housing in which a shaft, a cup-shaped rotor with radial ribs, screening surfaces, a removable and upper rings, a loading nozzle, a cover, a funnel, a discharge chute, screw jacks, bearing units and a pulley are located V-belt transmission (KHETAUROV VN Development and design of vertical-type centrifugal mills, Vladikavkaz, Terek, 1999, p.20, Fig. 1.2).

The disadvantage of the mill is its high power consumption.

The objective of the invention is to reduce power consumption by introducing into the kinematic circuit of the load device.

This problem is achieved in that the dynamic self-grinding mill, comprising a housing in which the shaft is located, a bowl-shaped rotor with radial ribs, screening surfaces, a removable and upper rings, a loading nozzle, a cover, a funnel, an unloading tray, screw jacks, bearing assemblies and a V-belt pulley the gear is equipped with a closing kinematic mechanism consisting of gears fixed in the upper and lower parts of the rotor shaft and engaged with coaxially located relative to each other Stern, and the load device using a circulating closed loop power created by the loading within the elastic deformation of the torsion shaft material moment equal to the time at which the material is destroyed.

The drawing shows a schematic diagram of a mill dynamic self-grinding.

The dynamic self-grinding mill contains a housing 1; mounted on the shaft 2, a bowl-shaped rotor 5; radial ribs 8 and sieving surfaces 9; removable ring 10; upper ring 12; loading branch pipe 15; cover 14; discharge funnel 11; discharge tray 16; screw jacks 13; bearing bearings 3 and 4 of the shaft 2; V-belt drive pulley 6; V-belt transmission 7; gears 17, 18, 19 and 23; shafts 20 and 22; load device 21.

A cylindrical mill body 1 is rigidly fixed to the fixed frame. Shaft 2 is located coaxially with copus 1. A bowl-shaped rotor 5 is mounted in the housing, mounted on a shaft 2, having the shape of an inverted hollow truncated cone, the inner cavity of which is divided by radial ribs 8 into sections, and in each section, in the inclined part of the rotor 5, there are sifting surface 9 in the form of gratings. In the upper part, the cup-shaped rotor 5 is equipped with a removable ring 10, forming with the upper ring 12 a horizontal annular gap for the release of the crushed product. To download the source product there is a loading nozzle 15 located in the cover 14, which covers the top of the housing. In the lower part of the housing 1 there is an unloading funnel 11 connected to the unloading chute 16. The screw jacks 13 are used to set the gap between the upper 12 and the removable 10 rings. The size of the gap (2-10 mm) is determined by the technological requirements. The mill is driven through a V-belt pulley 7. A gear 17 is fixed in the upper part of the shaft 2, which engages with the gear 23. A gear 18 is fixed in the lower part of the shaft 2, which engages with the gear 19. The gears 19 and 23 are aligned. The shafts 20 and 22 are closed by a kinematic mechanism having a load device 21, using the closed loop circulating power created by loading within the elastic torsion deformation of the shaft material with a moment equal to the moment at which the material is destroyed.

The mill operates as follows.

In the housing 1, through the loading nozzle 15, the source material is continuously loaded, forming a constantly updated column above the bowl-shaped rotor 5 during operation. When the electric motor is turned on, material particles located in the cavity of the rotor begin to move to the periphery of the bowl under the action of centrifugal force, while simultaneously pressing against the radial ribs 8, and, once in the active grinding zone, they are crushed due to impacts, chipping and abrasion. Particles of material commensurate with the height of the annular discharge gap formed by rings 12 and 10 fall into the funnel 11 and are discharged from the mill through the discharge tray 16.

Particles of material larger than the size of the annular discharge gap, move in the housing along an ascending helical line and then, together with the source material, fall into the cavity of the bowl-shaped rotor. The finished product is additionally removed from the workspace through the grilles 9.

The technical result is a reduction in power consumption at the same performance.

Claims (1)

A dynamic self-grinding mill, comprising a housing in which a shaft, a cup-shaped rotor with radial ribs, screening surfaces, a removable and upper rings, a loading nozzle, a cover, a funnel, an unloading tray, screw jacks, bearing assemblies and a V-belt pulley, characterized in that the mill is equipped with a closing kinematic mechanism consisting of gears fixed in the upper and lower parts of the rotor shaft and engaged with the gear coaxially located relative to each other mi, and a load device using the circulating power of the closed loop created by loading within the elastic torsion deformation of the shaft material with a moment equal to the moment at which the material is destroyed.