CN116637515A - A dual-shaft stirring system and stirring method with adjustable blade angle - Google Patents

Abstract

The application provides a double-shaft stirring system with adjustable blade angles and a stirring method. The double-shaft stirring system comprises a shell and two stirring devices which are arranged in parallel, wherein each stirring device comprises a hollow stirring shaft, stirring blades, a rotating motor and a blade angle adjusting part, the hollow stirring shaft is arranged on the shell, the stirring blades are provided with a plurality of groups of blades which are oppositely arranged on two sides of the hollow stirring shaft, the rotating motor drives the hollow stirring shaft to rotate and drive the blades to rotate, the blade angle adjusting part comprises an inner shaft and a linear motor, the inner shaft is coaxially arranged in the hollow stirring shaft, one end of each blade penetrates through the hollow stirring shaft and is connected with the inner shaft, and the linear motor drives the inner shaft to linearly move and drives the stirring blades to swing so as to adjust the blade angle. The double-shaft stirring system can realize the angle adjustment between the two-shaft blades, and the mixing efficiency of materials is obviously improved.

Description

A dual-shaft stirring system and stirring method with adjustable blade angle

technical field

The invention relates to the technical field of mixing and stirring devices, in particular to a dual-shaft stirring system and a stirring method with adjustable blade angles.

Background technique

In the production process of feed, it is usually necessary to mix various materials in a certain proportion to meet the nutritional needs of animal growth. The twin-shaft mixer is a device that utilizes the synchronous rotation of two screw shafts for mixing; however, most of the blades of existing mixing and stirring devices such as the twin-shaft mixer cannot be adjusted, so that it is impossible to achieve the purpose of mixing different materials according to different process requirements. In addition, in order to avoid damage to the shape of feed and other materials caused by the blades during stirring, a lower stirring speed is usually used for stirring. At this time, there are common problems such as uneven mixing of materials and low mixing efficiency.

CN 215388945 U discloses a double-shaft stirring blade feed mixer that stirs evenly. A driving motor, the upper end of the body is provided with two sliding grooves along its length direction, the output shaft of the first driving motor penetrates into the body and is fixedly connected with a rotating shaft, the rotating shaft is provided with a number of stirring blades along the height direction, the driving mechanism consists of The driving screw and two driving blocks are formed. The driving screw and the two sliding grooves have the same direction and are arranged between the two sliding grooves. The two ends of the driving screw are provided with threads with opposite helical directions. Threaded connection, the rotating shaft is fixedly connected with the drive block. The above-mentioned double-shaft stirring blade feed mixer realizes stirring and mixing of the feed by moving left and right, but the mixing uniformity and mixing efficiency of the mixer still need to be improved.

In view of this, the present invention is proposed.

Contents of the invention

The object of the present invention is to provide a two-shaft stirring system and a stirring method with adjustable blade angles, which can realize the angle adjustment between the two-shaft blades and significantly improve the mixing efficiency of materials.

The invention provides a dual-shaft stirring system with adjustable blade angle, which includes a casing and two parallel stirring devices, each stirring device includes a hollow stirring shaft, a stirring blade, a rotating motor and a blade angle adjustment part, and the hollow stirring shaft is installed On the casing, the stirring blades are provided with multiple sets of blades installed on both sides of the hollow stirring shaft. The rotating motor drives the hollow stirring shaft to rotate and drives the blades to rotate. The blade angle adjustment part includes an inner shaft and a linear motor. The inner shaft is coaxially arranged on the Inside the hollow stirring shaft, one end of the blade passes through the hollow stirring shaft and is connected to the inner shaft. The linear motor drives the inner shaft to move linearly and drives the stirring blade to swing to adjust the blade angle.

Further, a discharge port is provided at the bottom of the shell, and bearing seats are installed oppositely on both sides of the shell, and the two ends of the hollow stirring shaft are coaxially installed on the bearing seats on both sides of the shell.

Further, one end of the hollow stirring shaft is connected to the rotating motor, a disc is arranged at the other end of the hollow stirring shaft, the linear motor is fixed on the disc, and one end of the inner shaft protrudes from the disc and passes through the inner shaft connector and Linear motor connection.

Further, a mounting hole is provided on the hollow stirring shaft, and a fish-eye bearing is interference-fitted in the mounting hole, and a blade connecting rod is provided at one end of the blade, and the blade connecting rod is installed on the fish-eye bearing and connected to the inner shaft.

Further, a sliding rod is fixedly connected to the inner shaft, and the blade connecting rod is hinged on the sliding rod.

Further, the adjacent blades of the two stirring devices are arranged oppositely or overlapped and staggered.

Further, the adjustable range of blade angle is -40° to 40°, such as -30° to 30°; preferably, the blade angles of the two stirring devices can be controlled to 30°, 30°, or 30° respectively °, -30°.

The present invention also provides a stirring method, which uses the above stirring system to stir materials.

Further, when stirring, the blades of the two stirring devices are controlled by a linear motor to swing in the same direction or in opposite directions.

Further, the stirring speed is controlled to be 15-40r/min, such as 15r/min.

Implementation of the present invention has at least the following advantages:

1. The stirring system of the present invention is simple in structure and easy to maintain. By setting blade angle adjustment parts on the two stirring devices, the linear motor drives the inner axis to move linearly and drives the stirring blades to swing to adjust the blade angle, thus realizing two stirring devices. The angle adjustment between the blades is convenient to meet the mixing process requirements of different materials;

2. The stirring method of the present invention improves the meshing degree of the blades by adjusting the angle of the blades between the two stirring devices at a lower stirring speed, and avoids the damage caused by the blades to the shape of feed and other materials during stirring. , At the same time, the mixing uniformity and mixing efficiency of materials are significantly improved, and the mixing efficiency is increased by as much as 30.33%-36.51%.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

Fig. 1 is the structural representation of the stirring system of an embodiment;

Fig. 2 is the front view of the mixing system of an embodiment;

Fig. 3 is the top view of the mixing system of an embodiment;

Fig. 4 is the structural representation of the stirring device of an embodiment;

Fig. 5 is a schematic diagram of the connection structure between the stirring blade and the inner shaft according to one embodiment;

Fig. 6 is the structural representation that the blade angles of two stirring devices are -30 °;

Fig. 7 is the turbulent kinetic energy nephogram at the half-section of the numerical simulation simplified model where the blade angles of the two stirring devices are 0°;

Fig. 8 is the cloud map of the turbulent kinetic energy at the half-section of the numerical simulation simplified model where the blade angles of the two stirring devices are -30°;

Fig. 9 is a structural schematic diagram of blade angles of two stirring devices being -30° and 30° respectively;

Fig. 10 is the turbulent kinetic energy nephogram at the half-section of the numerical simulation simplified model of two stirring device blade angles of -30° and 30° respectively;

Figure 11 is a structural schematic diagram of two stirring devices with biaxial overlapping and staggered blade angles of -30° and 30° respectively;

Fig. 12 is the turbulent kinetic energy nephogram at the half-section of the numerical simulation simplified model of the biaxial overlapping and interlacing of two stirring devices with blade angles of -30° and 30° respectively.

Explanation of reference signs:

11: Shell; 12: Outlet; 13: Rack; 21: Inner shaft; 22: Inner shaft connector; 23: Linear motor; 24: Slider; 25: Blade; 31: Hollow stirring shaft; 32: Fish Eye bearing; 33: bearing seat.

Detailed ways

It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form also includes the plural form, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this description, it indicates that there are Features, steps, operations, devices, components and/or combinations thereof.

The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

As shown in Figures 1 to 6, the dual-shaft stirring system with adjustable blade angles in this embodiment includes a housing 11 and two parallel stirring devices, each of which includes a hollow stirring shaft 31, stirring blades, and a rotating motor And the blade angle adjustment part, the hollow stirring shaft 31 is installed on the shell 11, the stirring blade is provided with a plurality of sets of blades 25 relatively installed on both sides of the hollow stirring shaft 31, the rotating motor drives the hollow stirring shaft 31 to rotate and drives the blades 25 to rotate, the blades The angle adjustment part includes an inner shaft 21 and a linear motor 23, the inner shaft 21 is coaxially arranged inside the hollow stirring shaft 31, one end of the blade 25 passes through the hollow stirring shaft 31 and is connected with the inner shaft 21, and the linear motor 23 drives the inner shaft 21 The linear motion drives the stirring blades to swing to adjust the angle of the blades 25 .

As shown in FIG. 1 and FIG. 2 , the shell 11 is installed on the frame 13 , and the shell 11 is welded to the frame 13 . It can be understood that the housing 11 has a stirring chamber for stirring materials, and the stirring blades of the stirring device are located inside the stirring chamber. A discharge port 12 is provided at the bottom of the casing 11, and the discharge port 12 can be welded to the bottom of the casing 11; a crossbeam is provided on both sides of the casing 11, and a threaded hole is provided on the crossbeam, and the bearing seat 33 is threadedly connected with the threaded hole , The two ends of the hollow stirring shaft 31 are coaxially installed on the bearing blocks 33 on both sides of the casing 11 .

As shown in Figures 3 and 4, one end of the hollow stirring shaft 31 is connected to a rotating motor (not shown), and the rotating motor drives the hollow stirring shaft 31 to rotate, and the hollow stirring shaft 31 and the inner shaft 21 rotate coaxially. The other end of the hollow stirring shaft 31 is provided with a disc, and a threaded hole is provided on the disc so as to be fixed on the disc with the linear motor 23 through threaded connection, and one end of the inner shaft 21 protrudes from the disc and passes through the inner shaft The connecting piece 22 is connected to the linear motor 23 , the inner shaft 21 and the inner shaft connecting piece 22 are bolted through a flange, and one side of the inner shaft connecting piece 22 is fixedly connected to the slider on the linear motor 23 .

As shown in Figure 5, a mounting hole is provided on the hollow stirring shaft 31, and a fish-eye bearing 32 is interference-fitted in the mounting hole. One end of the blade 25 is provided with a blade connecting rod, and the blade connecting rod is installed on the fish-eye bearing 32. and connected with the inner shaft 21. A slide bar 24 is fixedly connected to the inner shaft 21 , the inner shaft 21 and the slide bar 24 are fixedly connected by fastening screws, and the blade connecting rod is hinged on the slide bar 24 . The linear motor 23 drives the inner shaft connector 22 and the inner shaft 21 to perform linear motion, and the inner shaft 21 drives the fisheye bearing 32 and the blade 25 to swing through the slide bar 24 to adjust the angle.

The initial value of the blade 25 angle is 0°, that is, the blade 25 is vertically arranged with the hollow stirring shaft 31; the adjustable range of the blade 25 angle is -40° to 40°, such as -30° to 30°; two stirring devices Adjacent blades 25 are arranged oppositely or overlapped and staggered, that is, blades of one stirring device are inserted between adjacent blades of another stirring device. In addition, the linear motor 23 controls the blades 25 of the two stirring devices to swing in the same direction or in the opposite direction during stirring, and the stirring speed is controlled at 15-40r/min, so as to avoid damage to the shape of feed and other materials by the blades 25 during stirring.

The mixing system of this embodiment is provided with blade angle adjustment parts on the two stirring devices, and the linear motor 23 drives the inner shaft 21 to move linearly and drives the stirring blades to swing to adjust the angle of the blades 25, thus realizing the blade angle adjustment between the two stirring devices. The angle adjustment of 25 is convenient to meet the mixing process requirements of different materials; at a lower stirring speed, by adjusting the angle of the blade 25 between the two stirring devices, the meshing degree of the blade 25 is improved, which avoids stirring When the blade 25 causes damage to the shape of the feed and other materials, at the same time, the mixing uniformity and mixing efficiency of the materials are remarkably improved.

Example 2

In this embodiment, the mixing system of Example 1 is used to stir the feed; as shown in Figure 6, when stirring, the angles of the blades of the two stirring devices are controlled to be -30°, and the stirring speed is 15r/min.

As shown in Figure 7 and Figure 8, according to the numerical simulation results, when the blade angle is -30° and the stirring speed is 15r/min, the mixing efficiency when the blade angle is -30° with turbulent kinetic energy as the index The mixing efficiency is increased by 31.74% than when the blade angle is 0°.

Example 3

In this embodiment, the mixing system of Example 1 is used to stir the feed; as shown in Figure 9, the angles of the blades of the two stirring devices are controlled to be -30° and 30° respectively, and the stirring speed is 15r/min.

Combined with Figure 7 and Figure 10, according to the numerical simulation results, when the angles of the blades of the two stirring devices are -30° and 30° respectively, and the stirring speed is 15r/min, taking the turbulent kinetic energy as the index, the blades of the two stirring devices The mixing efficiency when the blade angles are -30° and 30° is 30.33% higher than that when the blade angles are both 0°.

Example 4

In this embodiment, the stirring system of Embodiment 1 is used to stir the feed; in combination with that shown in Figure 11, the angles of the blades of the two stirring devices are controlled to be -30° and 30° respectively, and the adjacent blades of the two stirring devices are overlapped and staggered. The stirring speed is 15r/min.

Referring to Figure 7 and Figure 12, according to the numerical simulation results, when the angles of the blades of the two stirring devices are -30° and 30° respectively, and the adjacent blades of the two stirring devices are overlapped and staggered, the turbulent kinetic energy is used as the index , the angles of the blades of the two stirring devices are -30° and 30° respectively, and the mixing efficiency when the adjacent blades of the two stirring devices are overlapped and staggered is 36.51% higher than that when the blade angles are both 0°.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (10)

1. A dual-shaft stirring system with adjustable blade angles, characterized in that it comprises a casing and two parallel stirring devices, each stirring device includes a hollow stirring shaft, stirring blades, a rotating motor and a blade angle adjustment unit, and the hollow The stirring shaft is installed on the shell, and the stirring blades are provided with multiple sets of blades installed on both sides of the hollow stirring shaft. The rotating motor drives the hollow stirring shaft to rotate and drives the blades to rotate. The blade angle adjustment part includes an inner shaft and a linear motor. The shaft is set inside the hollow stirring shaft, and one end of the blade passes through the hollow stirring shaft and is connected with the inner shaft. The linear motor drives the inner shaft to move linearly and drives the stirring blade to swing to adjust the blade angle. 2. The stirring system according to claim 1, characterized in that, a discharge port is provided at the bottom of the shell, and bearing seats are installed oppositely on both sides of the shell, and the two ends of the hollow stirring shaft are coaxially installed on both sides of the shell on the bearing seat. 3. The stirring system according to claim 1, characterized in that, one end of the hollow stirring shaft is connected to the rotating motor, a disc is arranged at the other end of the hollow stirring shaft, the linear motor is fixed on the disc, and one end of the inner shaft Protrudes from the disc and connects to the linear motor through an inner shaft connection. 4. The mixing system according to claim 1, characterized in that, a mounting hole is provided on the hollow stirring shaft, a fisheye bearing is interference fit in the mounting hole, a blade connecting rod is provided at one end of the blade, and the blade is connected The rod is mounted on fisheye bearings and connected to the inner shaft. 5 . The mixing system according to claim 4 , wherein a sliding rod is fixedly connected to the inner shaft, and the connecting rod of the blade is hinged on the sliding rod. 6 . 6. The stirring system according to claim 1, characterized in that the adjacent blades of the two stirring devices are arranged oppositely or overlapped and staggered. 7. The mixing system according to claim 1, characterized in that, the adjustable range of blade angle is -40° to 40°. 8. A stirring method, characterized in that, the stirring system according to any one of claims 1-7 is used to stir the materials. 9. The stirring method according to claim 8, characterized in that the blades of the two stirring devices are controlled by a linear motor to swing in the same direction or in opposite directions during stirring. 10. The stirring method according to claim 8, characterized in that the controlled stirring speed is 15-40r/min.