Rotating electrode atomization pulverizing device

Abstract

The invention discloses a rotating electrode atomization powder manufacturing device which comprises an atomization chamber, a feeding mechanism and a plasma generator, the feeding mechanism comprises three roller sets which are evenly arranged in a triangle shape and clamp a bar in the radial direction, three roller shafts used for penetrating through the roller sets, and two driving motors correspondingly connected with the two roller shafts located on the lower portion. Each roller group is provided with a plurality of rollers arranged at the front section of the roller shaft and a plurality of rollers arranged at the middle-rear section of the roller shaft, the roller surface of each roller is provided with a spiral propelling convex pattern, and the contact surface of the propelling convex pattern is an arc surface; and the distance between the plurality of rollers arranged at the front section of the roller shaft is smaller than that between the plurality of rollers arranged at the middle-rear section of the roller shaft. A plurality of small-spacing rollers arranged at the front section of the roller shaft are used for clamping and rotating a bar at a high speed, and a plurality of large-spacing rollers arranged at the middle-rear section are used for supporting, balancing and propelling the bar, so that shaking and deviation caused by high-speed rotation of the bar are reduced.

Description

Technical Field

[0001] The invention belongs to plasma rotary atomization equipment, and in particular relates to a rotary electrode atomization powder making device. Background Art

[0002] In modern industrial production, plasma rotary atomization technology has attracted much attention because it can produce high-quality and high-performance metal powders. However, in the actual application of plasma rotary atomization equipment, there are many problems with the performance of its rotating shaft. Since the existing bar material is directly connected to the rotating shaft of the drive motor, it often cannot meet the requirements of high-speed rotation, and the speed is difficult to increase to the ideal level. Usually, a bottleneck is encountered in the lower speed range. At the same time, the stability of the speed is also difficult to guarantee, which will lead to uneven atomization effect and affect product quality. The reasons for this situation are as follows:

[0003] First, the traditional bar stock has no support structure and is not reasonable enough, which causes the longer bar stock to shake and deflect when rotating at high speed. It also cannot effectively disperse the stress and heat during the rotation process, thus limiting the increase in rotation speed. Secondly, the design of the drive system is not optimized enough, the power transmission efficiency is low, and it is difficult to provide enough torque to drive the bar stock to a higher speed. In addition, the manufacturing process and material selection of the bar stock are also insufficient, and it cannot withstand the huge centrifugal force and friction caused by high-speed rotation, and is prone to wear, deformation, and even breakage. These problems not only affect production efficiency, but also increase the maintenance cost and downtime of the equipment, causing great economic losses to the company.

[0004] Therefore, due to the difficulty of dynamic balancing and the complexity of the structure, the rotation speed of the current rotary plasma atomization powder making equipment has been maintained below 20,000 rpm, and there has been no breakthrough in higher speed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a rotating electrode atomizing powder making device, which is beneficial to improving the rotation speed and stability of the rod material.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A rotating electrode atomizing powder making device comprises an atomizing chamber, a feeding mechanism arranged outside the atomizing chamber for driving a rod material to enter and rotate from one side of the atomizing chamber, and a plasma generator arranged at the other side of the atomizing chamber for melting the end of the rod material entering. The feeding mechanism comprises three roller groups which are evenly arranged in a herringbone shape and radially clamp the rod material, three roller shafts for passing through each roller group, and two driving motors correspondingly connected to two roller shafts located at the lower part. Each roller group comprises a plurality of rollers arranged at the front section of the roller shaft and a plurality of rollers arranged at the middle and rear section of the roller shaft. The wheel surface of each roller has a spiral propulsion convex pattern, the contact surface of the propulsion convex pattern is an arc surface, and the spacing between the plurality of rollers arranged at the front section of the roller shaft is smaller than the spacing between the plurality of rollers arranged at the middle and rear section of the roller shaft.

[0008] It also includes a support base and an upper cover plate arranged above the support base and hinged to the support base through one side, the two lower roller shafts are respectively fixed on the support base through bearings, and the upper roller shaft is fixed on the upper cover plate through a bearing.

[0009] The wheel surface of the roller is also provided with a wear-resistant coating.

[0010] The spacing between the plurality of rollers arranged at the front section of the roller shaft is in the range of 5-20 mm.

[0011] The spacing between the plurality of rollers arranged in the middle and rear section of the roller shaft ranges from 15 to 55 mm.

[0012] The driving motor is connected to the corresponding roller shaft through a coupling.

[0013] A rotating electrode atomization powder making device of the present invention adopts three roller groups that are evenly arranged circumferentially and radially clamp the rod material. Through the high-speed reverse drive of two driving motors, the two roller groups below are driven to rotate in reverse and the upper roller group is driven to drive the middle rod material to rotate at high speed and propel it toward the atomization chamber. A number of small-pitch rollers arranged at the front section of the roller shaft are used to clamp and rotate the rod material at high speed, and a number of large-pitch rollers arranged at the middle and rear sections are used to support, balance and propel the rod material, thereby reducing the shaking and deviation caused by its high-speed rotation. In addition, the roller group is directly mounted on the roller shaft, without the need for accessories such as bearings, reducing the need to consider cooling, stress and other issues. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The invention is described in detail below with reference to the accompanying drawings and specific embodiments:

[0015] Figure 1 It is a three-dimensional schematic diagram of the rotating electrode atomization powder making device of the present invention;

[0016] Figure 2 It is a cross-sectional view of the rotating electrode atomizing powder making device of the present invention;

[0017] Figure 3 is a three-dimensional schematic diagram of the driving mechanism of the present invention;

[0018] Figure 4 is a cross-sectional view of the driving mechanism of the present invention;

[0019] Figure 5 is an axial view of the drive mechanism of the present invention;

[0020] Figure 6 is another cross-sectional view of the driving mechanism of the present invention;

[0021] Figure 7 This is a schematic diagram of a driving mechanism of the present invention that adopts a height adjustment structure. DETAILED DESCRIPTION

[0022] A rotating electrode atomizing powder making device according to the present invention is as follows Figure 1-Figure 2 As shown, it includes an atomization chamber 20, a feeding mechanism arranged outside the atomization chamber 20 for driving the rod 7 to enter and rotate from one side of the atomization chamber 20, and a plasma generator 22 arranged at the other side of the atomization chamber 20 for melting the end of the entering rod 7. An opening is arranged on the right side of the atomization chamber 20, and a flange 23, an insulating plate 24 and a mounting seat 25 are arranged in the opening in sequence. The mounting seat 25 has a through hole and a sealing structure 26 in the middle. The front end of the rod 7 enters the atomization chamber 20 through the through hole, and is melted and rotated to form an atomization by the plasma torch generated by the plasma generator 22.

[0023] Please combine Figure 3-Figure 6 As shown, the feeding mechanism specifically includes three roller groups that are evenly arranged in a herringbone shape and radially clamp the rod 7 (with an angle of 120° to each other), three roller shafts 1 for passing through each roller group, and two drive motors 5 arranged side by side and correspondingly connected to the two roller shafts 1 located at the bottom. Among them, each roller group has a plurality of rollers 8 arranged at the front section of the roller shaft 1 and a plurality of rollers 8 arranged at the middle and rear sections of the roller shaft 1. The wheel surface of each roller 8 has a spiral propulsion convex pattern 2 (which can be machined), and the contact surface of the propulsion convex pattern 2 is an arc surface, that is, it is a point contact with the rod 7. And the spacing between the plurality of rollers 8 arranged at the front section of the roller shaft 1 is much smaller than the spacing between the plurality of rollers 8 arranged at the middle and rear sections of the roller shaft 1. As shown Figure 1As shown, there are three rollers 8 arranged at the front section of the roller shaft 1. According to the diameter and length of the bar material, the spacing between the rollers 8 is generally designed to be 5-20mm for bars with a diameter of 30-70mm. They mainly play the role of clamping the bar material 7 and driving the bar material 7 to rotate at high speed. There are four rollers 8 arranged at the middle and rear section of the roller shaft 1. According to the diameter and length of the bar material, the spacing between the rollers 8 is generally designed to be 15-55mm for bars with a diameter of 30-70mm. They mainly play the role of supporting and balancing the bar material 7 and pushing it forward. Of course, according to the different diameter and length specifications of the bar material 7, the number and spacing of the above rollers 8 can also be adjusted accordingly.

[0024] The feeding mechanism also includes a support base 4 and an upper cover plate 3 which is arranged above the support base 4 and hinged to the support base 4 through one side. The two lower roller shafts 1 are fixed to the support base 4 through bearings 10, and the upper roller shaft 1 is fixed to the upper cover plate 3 through bearings 10. By flipping and opening the upper cover plate 3, it is convenient to load the bar material 7 and press the upper roller group onto the bar material 7. In addition, the upper cover plate 3 can also be adjusted by a height adjustment structure (such as Figure 7 The height is adjusted in the form of a combination of a vertical waist hole 9 and a hinge 11, so as to meet the clamping requirements of bars 7 with different diameters.

[0025] The wheel surface of the roller 8 (including the spiral propulsion convex pattern 2 ) is also provided with a wear-resistant coating such as polytetrafluoroethylene to reduce the friction loss between the roller and the rod 7 .

[0026] The motor shaft of the driving motor 5 is connected to the corresponding roller shaft 1 via a coupling.

[0027] During installation and commissioning, high-precision measuring instruments can be used to ensure the position accuracy and uniform distribution of contact pressure between the three roller groups and the bar 7. Through precise adjustment, the entire system can maintain a stable operating state when rotating at high speed.

[0028] When the feeding device of the present invention is in operation, the two driving motors 5 rotate in opposite directions and transmit power to the bar material 7 through the roller shaft 1 and the roller group, and the bar material 7 rotates at high speed and moves forward under the clamping of the three roller groups. Due to the uniform distribution and stable support of the rollers 8, the bar material 7 can steadily reach a speed of more than 40,000 revolutions and maintain good speed stability.

[0029] However, those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A rotating electrode atomizing powder making device, comprising an atomizing chamber, a feeding mechanism arranged outside the atomizing chamber for driving a rod material to enter from one side of the atomizing chamber and rotate, and a plasma generator arranged at the other side of the atomizing chamber for melting the end of the entering rod material, characterized in that: The feeding mechanism includes three roller groups that are evenly arranged in a herringbone shape and radially clamp the rod material, three roller shafts for passing through each roller group, and two driving motors corresponding to the two roller shafts located at the bottom. Each roller group has several rollers arranged at the front section of the roller shaft and several rollers arranged at the middle and rear sections of the roller shaft. The wheel surface of each roller has a spiral propulsion convex pattern, and the contact surface of the propulsion convex pattern is an arc surface. The spacing between the several rollers arranged at the front section of the roller shaft is smaller than the spacing between the several rollers arranged at the middle and rear sections of the roller shaft.

2. The rotating electrode atomizing powder making device according to claim 1, characterized in that: It also includes a support base and an upper cover plate arranged above the support base and hinged to the support base through one side, the two lower roller shafts are respectively fixed on the support base through bearings, and the upper roller shaft is fixed on the upper cover plate through a bearing.

3. The rotating electrode atomizing powder making device according to claim 1, characterized in that: The wheel surface of the roller is also provided with a wear-resistant coating.

4. The rotating electrode atomization powder making device according to claim 1, characterized in that: The spacing between the plurality of rollers arranged at the front section of the roller shaft is in the range of 5-20 mm.

5. The rotating electrode atomizing powder making device according to claim 1, characterized in that: The spacing between the plurality of rollers arranged in the middle and rear section of the roller shaft ranges from 15 to 55 mm.

6. The rotating electrode atomization powder making device according to claim 1, characterized in that: The driving motor is connected to the corresponding roller shaft through a coupling.

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