RU2504433C1 - Cam-type grinder - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to fine grinders of various materials and can be used in whatever industry. Proposed grinder comprises loading bin, discharge opening, housing with shafts running in bearings are fitted and furnished with discs, their end surfaces being furnished with interacting working cams. Besides, this device incorporates extra perfected end mechanism composed by shaft engaged on one side by gearing and, on opposite side, by load device and loader composed by coupling with shafts carrying working discs.

EFFECT: decreased metal input.

2 dwg

Description

The invention relates to devices for fine grinding of various materials and can be used in many industries.

A device for crushing waste sheet material / Auth. testimonial. USSR No. 1258471, MKI V02C 4/00 /, comprising upper and lower drive cylindrical gears, the troughs of which are provided with grooves, and a waste disposal mechanism including a nozzle connected to a compressed air source. The mechanism is located near the interaction zone of gears, the inner surface of which is hollow, while the grooves are made through, and the teeth of one of the gears are made with a triangular profile with an angle at the apex of 70-80 °.

Known cam mill / Pat. RF №2242285, IPC В02С 13/20 /, comprising a housing with working elements installed in it in the form of cams, a loading hopper and an unloading device, while the cams are mounted on the end surfaces of the disks along concentric circles with the possibility of interaction with each other, each of the cams made in the form of a truncated pyramid, and in sections parallel to the disks, have a trapezoidal shape, while both disks are rotatably mounted in the case, and inclined slots with an angle of inclination are made in the lower part of the case it is one of the walls in the direction opposite to the rotation of the disks.

For the prototype of the selected cam grinder / Pat. RF №2348460, IPC В02С 13/20 /, containing a loading hopper, an unloading hatch, a housing in which shafts with bearing discs mounted on them are installed in the bearing supports, the end surfaces of which are equipped with working elements in the form of cams interacting with each other. In addition, it is equipped with a closing circuit, consisting of two shafts connected by means of gears with shafts on which the carrier disks are located, and connected to a loader made in the form of a planetary differential connected with a loading device by means of a lever. The invention reduces power consumption.

The design of the device selected for the prototype allows you to grind materials with a large deformation ability, in particular: leather, rubber, foam, various elastomers, etc.

The disadvantage of the prototype is too cumbersome kinematic circuit of the closing circuit, load device and loader.

The objective of the invention is to improve the kinematic circuit of the closing circuit, the loading device and the loader, and, as a consequence, reducing the metal consumption of the chopper.

Figure 1 shows a diagram of a cam mill adopted as a prototype. Figure 2 shows a schematic diagram of the described invention.

The problem is solved as follows. The proposed device for grinding, containing a loading hopper, an unloading hatch, a housing in which shafts are mounted in bearing bearings with bearing discs located on them, the end surfaces of which are equipped with working elements in the form of cams interacting with each other, is additionally equipped with an improved closing circuit, consisting of from a shaft connected on one side by means of a transmission, and on the other by means of a loading device and a loader made in the form of a coupling, with shafts on which carrier discs laid.

This design of the device allows you to improve the kinematic chain of a closed loop, load device and loader, and provides grinding of all the material loaded into it by compression with shear and shear. In order to reduce power consumption, the kinematic circuit of the chopper is closed, and the closure of the kinematic chain goes through the clutch.

The presence of a load device leads to a decrease in power consumption, and also allows you to adjust the tightness in a closed loop.

The cam grinder (figure 2) contains a housing 1 in which shafts 4 and 5 are installed in the bearing supports 2 and 3 with bearing disks 6 and 7 located on them, the end surfaces of which are equipped with working elements in the form of cams 8 and 9, interacting with each other friend. The chopper is equipped with a loading hopper 10, a discharge hatch 11.

On the right side of the chopper there is a gear housing 12, in which a shaft 14 is installed in the bearings 13. Inside the hollow shaft 14, the right end of the shaft 5 rests on the bearings 15. At the ends of the shafts 5 and 14, a coupling 16 is installed on the right side, which acts as a load device and loader. On the left side of the shaft 14 is located the gear 17, which engages with the gear 18 located on the shaft 4.

The chopper is driven from the engine 19 through a coupler 20.

The chopper works as follows.

The crushed material is fed from the loading hopper 10 into the working space of the device, limited by the disks 6 and 7. When the disks 6 and 7 rotate, the cams 8 and 9 interacting with each other capture the fed material and grind it. Moreover, due to the design features of the device described above, the material falling between the interacting cams is affected by shear compression and shear deformations, which contribute to the quick and fine grinding of the material. The grinding of the material occurs mainly between the side surfaces of the cams, as well as at the junction of the cams and the housing. Therefore, the use of additional load between the side surfaces of the cams, which is provided by the load device, leads to a reduction in the power consumed for grinding by the drive motor. The crushed material is discharged through the hatch 11.

The advantages of the proposed device are:

1. wide technological capabilities due to the fact that it provides grinding of various materials: gravel, slag, minerals, grain, plastics, rubber waste, leather, wood, etc., while the size of the fractions of the crushed product is 20-150 microns;

2. reduction of power consumption due to the introduction into the kinematic circuit of a closing circuit, a loading device and a loader made in the form of a coupling;

3. The improved kinematic chain of the closing circuit, the loading device and the loader, and, as a result, the reduced metal consumption of the grinder.

Claims (1)

A cam shredder comprising a loading hopper, an unloading hatch, a housing in which shafts are mounted in bearing bearings with bearing discs located on them, the end surfaces of which are equipped with work elements in the form of cams interacting with each other, characterized in that it is additionally equipped with a closing circuit consisting of a shaft connected on one side by transmission, and on the other by means of a loading device and a loader made in the form of a coupling, with shafts on which Driving wheels.

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