RU2670520C1 - Vibration mill - Google Patents

Abstract

FIELD: disintegrators and crushing devices.

SUBSTANCE: invention relates to materials grinding devices. Vibratory mill comprises cylindrical grinding chamber 1 with grinding bodies mounted on base 2, bracket 3 and at least one hydraulic cylinder or pneumatic cylinder 4 with a four-way air distribution valve 5 and a travel mechanism. Hydraulic cylinder or pneumatic cylinder 4 is installed between the bracket 3 and the base 2 with the possibility of creating vibration of the grinding chamber 1 by the action of the rod on the bracket 3. Hydraulic cylinder 4 or pneumatic cylinder is installed with the possibility of changing the direction of vibration. Rod of the hydraulic cylinder or the pneumatic cylinder 4 can be pivotally connected to bracket 3.

EFFECT: in mill provides a simplified design, increased reliability of operation.

3 cl, 6 dwg

Description

The invention relates to devices for grinding materials, in particular to vibration mills, which can be used in the construction, mining, metallurgical, food or chemical industries.

Known vibration mill, including a cylindrical grinding chamber filled with grinding bodies, installed using elastic elements on the base, and the grinding chamber is rigidly connected with lateral unbalanced vibratory actuators located on diametrically opposite sides of the grinding chamber (see RF patent for invention No. 262,715, IPC ( 2006.01) В02С 19/16, В02С 17/00, published on 12/01/2017, Byul. No. 34). In the construction of this vibration mill, the unbalance drives are equipped with bearings, which, due to rigid alternating loads, often fail, which contributes to a decrease in the life of the mill, an increase in the frequency of repair work and, consequently, the cost of their implementation, as well as a decrease in productivity due to the idle mill during repair work. In addition, the design of this mill does not provide for a change in the amplitude of vibration.

The disadvantage of the analog is the complexity of the design, low reliability during operation and the inability to change the amplitude of vibration, which affects the efficiency and degree of grinding materials.

Closest to the claimed device is a vibration mill containing a cylindrical grinding chamber filled with grinding bodies installed on the base (see RF patent for invention №2501608, IPC (2006.01) В02С 19/00, publ. 12.20.2013, Byul. No. 35). In this vibratory mill, the grinding chamber is installed on the base with the help of elastic elements and is equipped with two unbalanced vibration drives. Each unbalance vibro drive includes a drive shaft with an individual rotation drive, made with the possibility of independent changes in the angular speed and direction of rotation of the drive shaft, and unbalances mounted on the drive shaft. In this case, the unbalance vibration actuators are placed diametrically opposite to the side walls of the grinding chamber in the plane of transverse symmetry of the grinding chamber.

The prototype has the same disadvantages as the analog, namely, the complexity of the design, low service life, low reliability during operation, and the lack of possibility of changing the amplitude of vibration. In the design of the prototype, as well as in the design of the analogue, there are bearings in the unbalance drives, which in the vibratory mill have a low service life due to the alternating load. Therefore, the mill of this design requires frequent repair, which also contributes to lower productivity. However, the design of this mill does not provide for a change in the amplitude of vibration, which reduces the possibility of varying the intensity of vibration and, consequently, the efficiency and degree of grinding materials.

The result of the proposed technical solution is to simplify the design, increase the reliability of operation, durability, performance, as well as the ability to control the amplitude of vibration, efficiency and degree of grinding of the material.

This technical result is achieved by the fact that the vibratory mill, including a cylindrical grinding chamber with grinding bodies, mounted on the base according to the invention, is additionally equipped with a bracket, and at least one hydraulic cylinder or pneumatic cylinder with a four-way air-distributing valve and a displacement mechanism, and a hydraulic cylinder or a pneumatic cylinder is installed between the bracket and the base with the possibility of creating a grinding chamber vibration by acting on the bracket with a rod.

The hydraulic cylinder or pneumatic cylinder is installed with the possibility of changing the direction of vibration exposure.

The rod of the hydraulic cylinder or pneumatic cylinder is pivotally connected to the bracket.

This vibration mill will simplify the design, improve the reliability of operation, durability and performance of the vibration mill, as well as allow you to adjust the amplitude of vibration, the efficiency and degree of grinding of the material.

The invention is illustrated by drawings, where in FIG. 1 shows a vibration mill with a horizontal arrangement of a hydraulic cylinder or a pneumatic cylinder with a working stroke of the piston; FIG. 2 - also with the horizontal arrangement of the hydraulic cylinder or pneumatic cylinder with the piston idling, in FIG. 3 - the same with the vertical arrangement of the hydraulic cylinder or pneumatic cylinder, in FIG. 4 is the same with an inclined arrangement of the hydraulic cylinder or pneumatic cylinder; in FIG. 5 - the same with the arrangement of hydraulic cylinders or pneumatic cylinders, along the perimeter of the grinding chamber, in FIG. 6 is a view A of FIG. five.

Vibration mill, includes a cylindrical grinding chamber 1 with grinding bodies, mounted on base 2, bracket 3 and at least one hydraulic cylinder or pneumatic cylinder 4 with four-way air distribution valve 5 and a displacement mechanism, for example, a screw pair 6. Moreover, a hydraulic cylinder or pneumatic cylinder 4 installed between the bracket 3 and the base 2 with the ability to create vibration grinding chamber 1 by the impact on the bracket 3 of the hydraulic cylinder rod or pneumatic cylinder 2. At the same time, the hydraulic cylinder rod or pneumatic cylinder 2 is pivotally connected to the bracket 3. The hydraulic cylinder or pneumatic cylinder 4 is mounted with the possibility of changing the direction of the vibrational effect, e.g., via pulley block 7.

The device works as follows.

Compressed air or liquid, such as oil, may be used as the working medium. When using oil, the vibration mill is equipped with a hydraulic cylinder, and when using compressed air, it is equipped with a pneumatic cylinder. Consider the operation of a device in which oil is used as a working medium.

When the four-way air-distributing valve 5 is located in the “working” position (Fig. 1), the oil enters the working cavity of the hydraulic cylinder 4 and its piston starts to move downward, dragging the bracket 3, and the grinding chamber 1 deviates from its original position. Then the actuator (in Fig. Not shown) valve 5 is transferred to the "idle" position (Fig. 2) and the oil enters the idle cavity of the hydraulic cylinder 4. In this case, the rod of the hydraulic cylinder 4 creates a pushing effect on the bracket 3 and the grinding chamber 1 returns to its original position, and the oil from the working cavity flows through the valve 5. After that, the vibration cycle repeats. The particles of the material, moving in the gaps between the grinding bodies, are crushed due to shock, abrasive and crushing loads.

Screw pair 6 allows you to adjust the vibration amplitude by moving the hydraulic cylinder 4 and, consequently, changing the distance between the bracket 3 and the base 2. The farther from the bracket 3 is the hydraulic cylinder 4, the smaller the vibration amplitude. Regulation of the intensity of vibration is carried out by changing the engine speed of the four-way air-distributing valve 5. Changing the amplitude and intensity of vibration allows to control not only the amplitude-frequency characteristic of the grinding media, but also the nature of the grinding process depending on the strength and particle size of the source material.

The use of a group of hydraulic cylinders 4 (possibly smaller in size than a single hydraulic cylinder) installed along the perimeter of the grinding chamber 1 (Fig. 5, 6) also intensifies the vibration and, consequently, increases the efficiency and degree of grinding of the material. Changing the angle of application of vibration exposure is due to the inclination of the base 2 with the help of a pulley 7 (Fig. 3, 4). Then the hydraulic cylinders 4 can provide a horizontal, or diagonal, or vertical vibrating effect on the grinding chamber 1. A change in the angle of application of the vibration effect affects the mixing intensity of the grinding bodies, excluding the appearance of stagnant zones. Considering that the hydraulic cylinders 4 are not directly connected with the grinding chamber 1, they can easily be placed anywhere relative to the grinding chamber 1, for example, along a diagonal axis of horizontal section perpendicular or longitudinal to the axis, as well as along the entire perimeter of the grinding chamber 1. This makes it possible to obtain multiple forms of vibration, the path of movement of the material in the grinding chamber 1 and to adjust the efficiency and degree of grinding of the material. The complex effect of hydraulic cylinders 4 on the grinding chamber 1 creates a non-uniform velocity field and kinetic energies in the grinding medium, which creates conditions for the selective grinding of material particles and generally improves the efficiency of the grinding process.

This vibration mill compared to the prototype will simplify the design, improve operational reliability, durability and performance, as well as allow you to adjust the amplitude and intensity of vibration and, consequently, the efficiency and degree of grinding of the material.

Claims (3)

1. Vibration mill, including a cylindrical grinding chamber with grinding bodies mounted on the base, characterized in that it is additionally equipped with a bracket and at least one hydraulic cylinder or pneumatic cylinder with a four-way air-distribution valve and a displacement mechanism, with the hydraulic cylinder or pneumatic cylinder being installed between the bracket and base with the ability to create vibration grinding chamber impact on the bracket rod. 2. Vibration mill under item 1, characterized in that the hydraulic cylinder or pneumatic cylinder is installed with the ability to change the direction of vibration exposure. 3. Vibration mill according to Claim. 1, characterized in that the rod of the hydraulic cylinder or pneumatic cylinder is pivotally connected to the bracket.

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