RU2528843C1 - Mixing device - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: mixing device consists of a motor, working members and an actuating mechanism placed in a separate casing. The actuating mechanism consists of a crank-and-rocker mechanism with a central gear wheel engaged with the gear wheels being fixed on the rocker. The central gear wheel is installed on the cover of a reactor casing with the possibility of rotation and is coupled to the motor via the crank-and-rocker mechanism consisting of a crank, a connecting rod and a rocker, and the working members are coupled with the shafts of the gear wheels. The working members can be made as blades with holes.

EFFECT: increased velocity gradient and intensified mixing.

2 cl, 2 dwg

Description

The invention belongs to the field of mechanical engineering and relates to mixing devices. It can be used in the chemical, construction, food industry as a device necessary for the intensification of heat and mass transfer processes, for equalizing concentrations and temperatures in the entire liquid volume.

A device for mixing is known (Application for invention RU No. 94025879 A1, class B28C 5/16), containing a container inside which is a removable working body, and its drive is made in the form of a crank, which is connected through the rotational kinematic pair to the rocker, moreover the axis of rotation of the formed kinematic pair is parallel to the axis of rotation of the wings and perpendicular to the axis of the rocker. During operation, the lowering depth and horizontal movement changes twice per cycle.

However, the specified device has the following disadvantages. The efficiency of this device is very low due to the use of a screw mechanism. In addition, the specified device has one working body, which leads to a decrease in the intensity of mixing.

In addition, it is known a device for mixing (AS USSR No. 1346224, class B01F 11/00) containing a housing, a reactor, a working body, an electromagnetic drive and a control unit.

However, the specified device for mixing inherent in the following disadvantages. The electromagnetic motor has low efficiency. This device also has such a disadvantage as the presence of only one working body and a small angle of rotation, which leads to low mixing intensity.

A device for mixing is known (Patent for the invention No. RU 2258558 C1, class B01F 7/30), which is a prototype of the present invention and contains kneading bodies fixed to the satellites with an offset relative to their rotation axes, which together with the satellites form nodes balanced against these axes. The central gear of the planetary drive mechanism of the kneading organs is movably connected to the housing by means of an elastic element. Vibro-mixing occurs throughout the volume of a viscous medium when using one planetary mechanism with balanced nodes, including a satellite and a kneading organ, without overloading the engine during its start-up and overloading the satellite bearings, as well as by complicating the absolute trajectory of the kneading organs.

However, in the specified device, the working bodies perform unidirectional movement along the reactor volume (portable motion) and rotational motion (relative). These movements do not change to the opposite value of the speed of the working bodies, which leads to a small difference (gradient) in the velocities of the mixed fluid layers, and, accordingly, to a decrease in the intensity of mixing of the working medium. Also, the actuator of the specified device is located in the working zone of the reactor (bowl) and can come into contact with the product of mixing, which leads to contamination of the product, lower efficiency and increased wear of the drive due to the possibility of the product of mixing in the gears, bearings of the actuators, etc.

The objective of the invention is to provide a mixing device, the actuator of which is isolated from the products of mixing and has high efficiency and productivity.

The technical result is an increase in the velocity gradient, an increase in the intensity of mixing.

This is achieved by the fact that the mixing device consists of an engine, working bodies and an actuator, which is located in a separate housing. The actuator consists of a crank-beam mechanism, on the beam of which a central gear wheel is fixed, which, in turn, is engaged with peripheral gears. The central gear wheel is rotatably mounted on the cover of the reactor vessel and connected to the engine through a crank mechanism consisting of a crank, connecting rod and rocker arm, and the working bodies are connected to the gear shafts. The working bodies can be made in the form of blades with holes.

The proposed device for mixing has the advantage of mixing the reciprocating movement of the working bodies with varying values of the angular velocity per cycle, obtained through the use of a crank-rocker mechanism. With this movement, the speed of the working bodies, and, accordingly, of the fluid, constantly changes its direction, which leads to an increase in the velocity gradient, which accordingly allows to increase the mixing intensity and productivity. Also, the placement of the actuator in a separate housing and placement outside the reactor zone allows you to isolate it from the products of mixing and increase efficiency.

Figure 1 shows a diagram of the proposed device, figure 2 shows a diagram of a section along aa.

The proposed device comprises a reactor 1, an engine 2, a cover 3, on which an actuator of a mixing device is mounted in a separate housing 4, made in the form of a crank-rocker mechanism containing a crank 5, a connecting rod 6 and a rocker 7 connected to the central gear wheel 8. Wheel 8 is meshed with peripheral gears 9. All gears are rigidly connected to shafts 10, and working bodies 11 are attached to them, which can be made in the form of blades with holes.

The actuator operates as follows. The engine 2 rotates the crank 5, which, by means of the connecting rod 6, drives the beam 7, on which the gear wheel 8 is fixed, which makes a reverse-rotational movement. The gear wheel 8 rotates the gears 9, the motion parameters of which are determined by the gear ratio. Movements from the gears are transmitted to the shafts 10 and, accordingly, to the working bodies 11. Since the gear 8 performs a reverse-rotational movement, the movement of all working bodies will also be reverse-rotational, which leads to mixing of the working medium.

Claims (2)

1. A mixing device containing an engine and working bodies, the actuating mechanism of which includes a central gear wheel meshed with peripheral gears, characterized in that the central gear is rotatably mounted on the lid of the reactor vessel and connected to the engine through a crank a mechanism consisting of a crank, connecting rod and rocker arm, and the working bodies are connected to the shafts of the gears. 2. The mixing device according to claim 1, characterized in that the working bodies are made in the form of blades with holes.

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