RU2031710C1 - Roll grinder - Google Patents

Abstract

FIELD: grinding of materials. SUBSTANCE: roll grinder has bedframe 5, and pair of rolls 1 and 2. At least one of rolls is installed on levers 3 interconnected by beam 4. Each lever 3 is hinge-connected with bedframe 5. Grinder has also roll flexible pressing power member. Grinder has U-shaped support 7 installed on bedframe 5. Beam 4 is arranged under bridge of support 7 and is pressed to the latter by roll flexible pressing power member mounted on support bridge. EFFECT: enhanced operation reliability. 2 cl, 2 dwg

Description

 The invention relates to equipment for grinding limestone, cement clinker, ores of ferrous and non-ferrous metals, more specifically to roller grinders, also known as press roller grinders, in which the material is crushed between two rotating rollers at a particularly high pressure of the rolls.

 Known roll shredder, comprising a bed, two rolls and a power element of the elastic pressure of the rolls, acting on one of the rolls, installed with the possibility of linear movement [1]. This design is complex, guides and crackers for linear movement quickly wear out and become clogged.

 In this regard, roller shredders were proposed, in which the rolls are installed with the possibility of not linear movement, but along an arc of a circle, for which the rolls are placed in levers.

 Known roll shredder, comprising a bed, a pair of rolls, at least one of which is installed in levers connected to each other by a beam, each of which is pivotally connected to the bed and the force element of the elastic pressure of the rolls [2]. This power element, made in this case in the form of hydraulic cylinders, connects the levers of one roll with the levers of another roll in such a way that the force created by the hydraulic cylinders and providing the required pressing force of the rolls is closed through the bed. Such a system is constantly stressed regardless of whether the material is crushed or not. In addition, the constantly working hydropneumatic system, which is necessary for the normal functioning of the roll hydraulic press, does not work reliably under conditions of increased dust content in the crushing plant, which reduces the operational reliability of the grinder.

 The purpose of the invention is to simplify the design and increase the operational reliability of the chopper.

 This is achieved by the fact that the roll shredder is equipped with a U-shaped rack mounted on the bed, the beam is located under the bridge jumper and pressed to it by the power element of the elastic roller pressing mounted on the jumper.

 In this case, the force element of the elastic pressing of the rolls, it is advisable to perform in the form of packets of springs located under the beam and above the bridge jumper on common rods.

 Figure 1 shows a roll mill, a cross section; figure 2 is a section aa in figure 1.

 The roll shredder contains a movable 1 and a fixed 2 rolls, each of which, through the bearing assemblies, is mounted in two levers 3 connected by a beam 4. The levers are coupled to the bed 5 using a hinge 6 located in the area under the rollers and allowing the levers with rolls to move along arc of a circle. The movable roll 1 with levers and a beam is fixed in working position with a U-shaped stand 7, covering the beam 4 and rigidly mounted on the frame 5. The stand and beam are pulled together by a double spring package 8, one of which is located under the beam, and the other on the counter. The springs are pulled together by common studs 9. The spring tightening force provides the required working force between the rollers. Each roll is driven, for example, from an electric motor through a planetary gear (not shown).

 Roller chopper works as follows.

The material to be crushed is fed through point 10 into the space between the rollers 1 and 2, rotating towards each other. Since the capture angle ^of 20-30 (depending on the properties of the crushed material and quality of the roll surface) material is trapped and tightened between the rolls. With insufficient nutrition, individual pieces are freely destroyed to a particle size corresponding to the established gap between the rolls. With abundant feeding in the crushing zone, the material is pressed and if the installation gap was less than the thickness of the pressed material, then the movable roller 1 should move away from the stationary roller 2 to a gap equal to the thickness of the pressed material due to the additional compression of the springs 8, while the beam 4 accordingly leaves from the stand 7. The spring mechanism works similarly when it gets between the rolls of an unbreakable body. The double spring package provides an increased roll stroke, allowing you to skip any practically possible crushed bodies.

 In the proposed design, the force of the force element - spring packages is transmitted through the beam directly to the rack. The roller and levers are loaded with this force only during the operation of the chopper.

 In addition, the proposed design of a spring device for clamping a movable roll requires minimal maintenance and provides high operational reliability of the chopper in this part.

Claims (2)

 1. ROLL GRINDER, comprising a bed, a pair of rolls, at least one of which is mounted in levers connected to each other by a beam, each of which is pivotally connected to the bed, and a force element for the elastic pressure of the rolls, characterized in that it is equipped with a bed mounted U-shaped rack, the beam is located under the jumper of the rack and pressed to it mounted on the jumper by the power element of the elastic pressure of the rolls.  2. The chopper according to claim 1, characterized in that the power element of the elastic pressing is made in the form of packets of springs located under the beam and above the bridge jumper on common rods.

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