A dual-speed driving electrode pull rod device

Abstract

The present application relates to the field of industrial smelting, and discloses a dual-speed driving electrode pull rod device, which can adjust the electrode speed according to different electroslag remelting links, save costs and improve efficiency. It includes a first and a second driving mechanism, a first connecting seat, a differential gear box, a second connecting seat and an electrode lifting mechanism. The first and the second driving mechanisms respectively include a first and a second motor, a first and a second reduction motor and a first and a second coupling. The first driving mechanism is connected to the differential gear box through the first connecting seat, the first coupling is connected to the input shaft of the differential gear box, and the second coupling is connected to the input shaft of the differential gear box. When one of the input shaft and the input shaft rotates, the other does not rotate. The lower output shaft of the differential gear box is connected to the electrode lifting mechanism through the second connecting seat. The first and the second driving mechanisms drive the electrode lifting mechanism at the first and the second speeds, respectively. The electrode lifting mechanism moves in the vertical direction, and the first speed is greater than the second speed.

Description

Technical Field

[0001] The present application relates to the field of industrial smelting, and in particular to a dual-speed drive electrode pull rod device. Background Art

[0002] Electroslag Remelting (ESR) is a smelting technology widely used in the special steel industry, mainly used to produce high-performance high-temperature alloys. These high-temperature alloys are usually used in aerospace, nuclear industry, engineering and heavy forging. The electroslag remelting technology refines steel by melting the consumable electrode head in the electroslag pool at the bottom of the water-cooled mold.

[0003] In this technology, an electric current is passed through the slag between the electrode and the ingot to be formed, heating the slag and thus melting the metal on the electrode. The molten metal passes through the slag layer in the form of droplets, drips into the bottom of the water-cooled mold and solidifies. In this way, the metal droplets are freed of non-metallic impurities as they pass through the slag, a process that involves chemical precipitation or physical flotation, which moves the impurities to the top of the slag pool. During the ingot formation process, the slag pool is carried up as the ingot rises, forming a thin layer of solidified slag skin.

[0004] This precise control of the solidification process ensures high product quality and structural integrity, resulting in significantly improved surface quality of the ingot. Therefore, electroslag remelting technology not only improves product consistency and predictability, but is also the preferred method for producing complex and demanding metal materials.

[0005] Despite the many advantages of electroslag remelting technology, a major limitation of the technology is the selection and cost of the servo motors required in large tonnage applications. Current solutions on the market often involve the use of large, expensive servo motors, increasing production costs, especially when producing large ingots. Summary of the invention

[0006] The purpose of the present application is to provide a dual-speed drive electrode pull rod device, which can effectively adjust the electrode speed according to different electroslag remelting links, thereby saving motor drive costs and improving the efficiency of the electroslag remelting process.

[0007] The present application discloses a dual-speed driving electrode pull rod device, comprising: a first driving mechanism 1, a second driving mechanism 2, a first connecting seat 3, a differential gear box 4, a second connecting seat 5 and an electrode lifting mechanism 6;

[0008] The first drive mechanism 1 includes a first motor 101, a first reduction motor 102 and a first coupling 103, the second drive mechanism 2 includes a second motor 201, a second reduction motor 202 and a second coupling 203, the first drive mechanism 1 is fixedly connected to the differential gear box 4 through the first connecting seat 3, the first coupling 103 is connected to the input shaft of the differential gear box 4, the second coupling 203 is connected to the input shaft of the differential gear box 4, and the differential gear box 4 is configured so that when one of the input shaft and the input shaft rotates, the other does not rotate;

[0009] The lower output shaft of the differential gear box 4 is fixedly connected to the electrode lifting mechanism 6 through the second connecting seat 5, the first driving mechanism 1 is configured to drive the electrode lifting mechanism 6 at a first rotational speed, the second driving mechanism 2 is configured to drive the electrode lifting mechanism 6 at a second rotational speed, the electrode lifting mechanism 6 is configured to move in a vertical direction, and the first rotational speed is greater than the second rotational speed.

[0010] In a preferred example, the electrode lifting mechanism 6 includes a mounting plate 601, a guide column 602, a ball screw 603 and an electrode pull rod group 604;

[0011] The mounting plate 601 is mounted on the lower end of the second connecting seat 5, and the nut of the ball screw 603 is mounted on the mounting plate 601, so that the upper end of the ball screw 603 passes through and is connected to the output shaft, and the lower end of the ball screw 603 is connected to the electrode pull rod group 604, and the ball screw 603 is configured to convert the rotational motion of the output shaft into linear motion, so that the electrode pull rod group 604 moves vertically up and down;

[0012] The guide posts 602 are installed on both sides of the mounting plate 601, and the electrode pull rod group 604 is located between the guide posts 602 on both sides of the mounting plate 601. The guide posts 602 are configured to guide the vertical movement of the electrode pull rod group 604 to prevent the electrode pull rod group 604 from swinging or deflecting during movement.

[0013] In a preferred example, the first motor 101 is a three-phase AC motor, and the second motor 201 is a servo motor.

[0014] In a preferred example, the input large shaft and the input small shaft are non-concentric input shafts, and the speed ratio and torque of the input large shaft and the input small shaft are different.

[0015] In a preferred example, the axis of the first driving mechanism 1 is perpendicular to the axis of the second driving mechanism 2 .

[0016] In a preferred embodiment, a third coupling is also included;

[0017] The upper end of the ball screw 603 is connected to the output shaft through the third coupling.

[0018] In a preferred example, the differential gear box 4 and the second connecting seat 5 are fixedly connected by a plurality of fastening screws.

[0019] In a preferred example, the first reduction motor 102 and the first connecting seat 3 are fixedly connected by a plurality of fastening screws.

[0020] In a preferred example, the differential gear box 4 is configured such that during loading and unloading, the large input shaft rotates, and the small input shaft does not rotate.

[0021] In a preferred example, the differential gear box 4 is configured such that during smelting, the large input shaft does not rotate, but the small input shaft rotates.

[0022] In the implementation manner of the present application, by integrating the first and second drive mechanisms, the present device can drive the electrode lifting mechanism at two different speeds, so that the operator can select the most suitable speed according to the specific stage of electroslag remelting, thereby improving the flexibility and efficiency of the process. Through the design of the differential gearbox, when one input shaft is rotating, the other remains stationary, so that the moving speed of the electrode can be more accurately controlled, thereby improving the accuracy of the electroslag remelting process. Compared with the design of the prior art using a single servo motor, the present application uses two drive mechanisms with different speeds and a differential gearbox, so that for large-tonnage applications, it is not necessary to select a large and expensive servo motor, but a relatively small servo motor can be selected. Even a small motor can provide the necessary speed and control without sacrificing torque, thereby having a cost advantage;

[0023] Furthermore, the electrode lifting mechanism composed of the mounting plate, the guide column, the ball screw and the electrode pull rod group can convert the rotational motion of the output shaft into up and down motion in the vertical direction, and the guide column can make the electrode move vertically stably and accurately, thereby ensuring the stability of the electrode during the smelting process;

[0024] Furthermore, fast driving is performed during loading and unloading, and slow driving is performed during smelting, so as to meet different requirements of different electroslag remelting processes.

[0025] A large number of technical features are recorded in the specification of this application, which are distributed in various technical solutions. If all possible combinations of technical features of this application (i.e., technical solutions) are to be listed, the specification will be too long. In order to avoid this problem, the various technical features disclosed in the above-mentioned invention content of this application, the various technical features disclosed in the various embodiments and examples below, and the various technical features disclosed in the accompanying drawings can be freely combined with each other to form various new technical solutions (these technical solutions are all deemed to have been recorded in this specification), unless the combination of such technical features is technically infeasible. For example, in one example, feature A+B+C is disclosed, and in another example, feature A+B+D+E is disclosed, and features C and D are equivalent technical means that play the same role. Technically, only one can be used, and it is impossible to use them at the same time. Feature E can be combined with feature C technically. Then, the solution of A+B+C+D should not be deemed to have been recorded because it is technically infeasible, and the solution of A+B+C+E should be deemed to have been recorded. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a structural schematic diagram of a dual-speed driving electrode pull rod device according to an embodiment of the present application;

[0027] Figure 2 It is a schematic structural diagram of a dual-speed driving electrode pull rod device according to an embodiment of the present application.

[0028] Description of reference numerals:

[0029] 1-first driving mechanism, 101-first motor, 102-first reduction motor, 103-first coupling, 2-second driving mechanism, 201-second motor, 202-second reduction motor, 203-second coupling; 3-first connecting seat, 4-differential gear box, 5-second connecting seat, 6-electrode lifting mechanism, 601-mounting plate, 602-guide column, 603-ball screw, 604-electrode pull rod group. DETAILED DESCRIPTION

[0030] In the following description, many technical details are provided to help readers better understand the present application. However, those skilled in the art can understand that the technical solution claimed in the present application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0031] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0032] The present application relates to a dual-speed driving electrode pull rod device, the structure of which is shown in FIG. Figure 1 and Figure 2 As shown, it includes: a first driving mechanism 1, a second driving mechanism 2, a first connecting seat 3, a differential gear box 4, a second connecting seat 5 and an electrode lifting mechanism 6.

[0033] The first drive mechanism 1 includes a first motor 101, a first reduction motor 102 and a first coupling 103, and the second drive mechanism 2 includes a second motor 201, a second reduction motor 202 and a second coupling 203. The first drive mechanism 1 is fixedly connected to the differential gear box 4 through the first connection seat 3, the first coupling 103 is connected to the input large shaft of the differential gear box 4, and the second coupling 203 is connected to the input small shaft of the differential gear box 4. The differential gear box 4 is configured so that when one of the input large shaft and the input small shaft rotates, the other does not rotate. The lower output shaft of the differential gear box 4 is fixedly connected to the electrode lifting mechanism 6 through the second connection seat 5. The first drive mechanism 1 is configured to drive the electrode lifting mechanism 6 at a first rotation speed, and the second drive mechanism 2 is configured to drive the electrode lifting mechanism 6 at a second rotation speed. The electrode lifting mechanism 6 is configured to move in the vertical direction, and the first rotation speed is greater than the second rotation speed.

[0034] In an optional embodiment, the electrode lifting mechanism 6 includes a mounting plate 601, a guide column 602, a ball screw 603 and an electrode pull rod group 604. The mounting plate 601 is mounted on the lower end of the second connecting seat 5. The nut of the ball screw 603 is mounted on the mounting plate 601, which is used to allow the upper end of the ball screw 603 to pass through and connect with the output shaft. The lower end of the ball screw 603 is connected to the electrode pull rod group 604. The ball screw 603 is configured to convert the rotational motion of the output shaft into linear motion, so that the electrode pull rod group 604 moves vertically up and down. The guide column 602 is mounted on both sides of the mounting plate 601, and the electrode pull rod group 604 is located between the guide columns 602 on both sides of the mounting plate 601. The guide column 602 is configured to guide the vertical movement of the electrode pull rod group 604 to prevent the electrode pull rod group 604 from swinging or deflecting during the movement.

[0035] In an optional embodiment, the first motor 101 may be a three-phase AC motor, and the second motor 201 may be a servo motor. Optionally, the rated frequency of the three-phase AC motor is 50 Hz, the rated power is 7.5 KW, the rated speed is 1480 r / min, and the speed ratio is 5.4. Optionally, the rated frequency of the servo motor is 50 Hz, the rated power is 1 KW, the rated speed is 750 r / min, and the speed ratio is 3.354.

[0036] In an optional embodiment, the input large shaft and the input small shaft can be non-concentric input shafts, and the speed ratio and torque of the input large shaft and the input small shaft are different. According to the above speed ratio, optionally, the output speed of the three-phase AC motor is 1480 / 5.4=274r / min, and the output torque is 254; optionally, the output speed of the servo motor is 750 / 3.354=223r / min; the output torque is 7.

[0037] In an optional embodiment, the axis of the first driving mechanism 1 may be perpendicular to the axis of the second driving mechanism 2 .

[0038] In an optional embodiment, a third coupling may be further included, and the upper end of the ball screw 603 is connected to the output shaft through the third coupling.

[0039] In an optional embodiment, the differential gear box 4 and the second connecting seat 5 can be fixedly connected by a plurality of fastening screws.

[0040] In an optional embodiment, the first reduction motor 102 and the first connecting seat 3 can be fixedly connected by a plurality of fastening screws.

[0041] In an optional embodiment, the differential gear box 4 can be configured such that during loading and unloading, the input large shaft rotates, and the input small shaft does not rotate.

[0042] In an optional embodiment, the differential gear box 4 may be configured such that during smelting, the large input shaft does not rotate, but the small input shaft rotates.

[0043] In order to better understand the technical solution of the present application, a specific example is provided below for illustration. The details listed in the example are mainly for ease of understanding and are not intended to limit the scope of protection of the present application.

[0044] The device of the present application is composed of a three-phase AC motor, a first reduction motor 102, a first connecting seat 3, a first coupling 103, a servo motor, a second reduction motor 202, a second coupling 203, a differential gear box 4, a second connecting seat 5, a mounting plate 601, a guide column 602, a ball screw 603 and an electrode pull rod group 604.

[0045] In the loading and unloading stage, the three-phase AC motor is started, and drives the input large shaft of the differential gear box 4 through the first reduction motor 102 and the first coupling 103, while the input small shaft remains stationary. The output shaft of the differential gear box 4 then drives the ball screw 603, so that the electrode pull rod group 604 moves vertically at a relatively fast speed, thereby realizing rapid loading and unloading.

[0046] During the smelting stage, the servo motor is started, and drives the input small shaft of the differential gear box 4 through the second reduction motor 202 and the second coupling 203, while the input large shaft does not rotate. At this time, the output shaft of the differential gear box 4 drives the ball screw 603, so that the electrode pull rod group 604 moves vertically at a slower speed to meet the accuracy requirements during the smelting process.

[0047] According to the requirements of different stages, different input shafts of the differential gearbox 4 are driven to adjust the speed of the output shaft, and then the rotation speed of the ball screw 603 is adjusted, so as to achieve precise control of the vertical movement speed of the electrode pull rod group 604. The device can provide the most suitable speed according to the process requirements without relying on large-tonnage servo motors, thereby optimizing cost-effectiveness and operating efficiency.

[0048] It should be noted that in the application documents of this patent, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one" do not exclude the existence of other identical elements in the process, method, article or device including the elements. In the application documents of this patent, if it is mentioned that an action is performed according to an element, it means that the action is performed at least according to the element, which includes two situations: performing the action only according to the element, and performing the action according to the element and other elements. Expressions such as multiple, multiple, and multiple include 2, 2 times, 2 kinds, and more than 2, more than 2 times, and more than 2 kinds.

[0049] All documents mentioned in this application are considered to be included in the disclosure of this application as a whole, so that they can be used as the basis for modification when necessary. In addition, it should be understood that after reading the above disclosure of this application, those skilled in the art can make various changes or modifications to this application, and these equivalent forms also fall within the scope of protection claimed in this application.

Claims

1. A dual-speed driving electrode pull rod device, characterized in that: include: A first driving mechanism (1), a second driving mechanism (2), a first connecting seat (3), a differential gear box (4), a second connecting seat (5) and an electrode lifting mechanism (6); The first drive mechanism (1) comprises a first motor (101), a first reduction motor (102) and a first coupling (103); the second drive mechanism (2) comprises a second motor (201), a second reduction motor (202) and a second coupling (203); the first drive mechanism (1) is fixedly connected to the differential gear box (4) via the first connecting seat (3); the first coupling (103) is connected to the input shaft of the differential gear box (4); the second coupling (203) is connected to the input shaft of the differential gear box (4); the differential gear box (4) is configured such that when one of the input shaft and the input shaft rotates, the other does not rotate; The lower output shaft of the differential gear box (4) is fixedly connected to the electrode lifting mechanism (6) via the second connecting seat (5); the first driving mechanism (1) is configured to drive the electrode lifting mechanism (6) at a first rotational speed; the second driving mechanism (2) is configured to drive the electrode lifting mechanism (6) at a second rotational speed; the electrode lifting mechanism (6) is configured to move in a vertical direction; and the first rotational speed is greater than the second rotational speed.

2. The dual-speed driving electrode pull rod device according to claim 1, characterized in that: The electrode lifting mechanism (6) comprises a mounting plate (601), a guide column (602), a ball screw (603) and an electrode pull rod group (604); The mounting plate (601) is mounted on the lower end of the second connecting seat (5); a nut of the ball screw (603) is mounted on the mounting plate (601) so as to allow the upper end of the ball screw (603) to pass through and be connected to the output shaft; the lower end of the ball screw (603) is connected to the electrode pull rod group (604); the ball screw (603) is configured to convert the rotational motion of the output shaft into linear motion, so that the electrode pull rod group (604) moves vertically up and down; The guide column (602) is installed on both sides of the mounting plate (601), and the electrode pull rod group (604) is located between the guide columns (602) on both sides of the mounting plate (601). The guide column (602) is configured to guide the vertical movement of the electrode pull rod group (604) to prevent the electrode pull rod group (604) from swinging or deflecting during movement.

3. The dual-speed driving electrode pull rod device according to claim 1, characterized in that: The first motor (101) is a three-phase AC motor, and the second motor (201) is a servo motor.

4. The dual-speed driving electrode pull rod device according to claim 1, characterized in that: The input large shaft and the input small shaft are non-concentric input shafts, and the speed ratio and torque of the input large shaft and the input small shaft are different.

5. The dual-speed driving electrode pull rod device according to claim 1, characterized in that: The axis of the first driving mechanism (1) is perpendicular to the axis of the second driving mechanism (2).

6. The dual-speed driving electrode pull rod device according to claim 2, characterized in that: Also included is a third coupling; The upper end of the ball screw (603) is connected to the output shaft via the third coupling.

7. The dual-speed driving electrode pull rod device according to claim 1, characterized in that: The differential gear box (4) and the second connecting seat (5) are fixedly connected by a plurality of fastening screws.

8. The dual-speed driving electrode pull rod device according to claim 1, characterized in that: The first reduction motor (102) and the first connection seat (3) are fixedly connected via a plurality of fastening screws.

9. The dual-speed driving electrode pull rod device according to claim 1, characterized in that: The differential gear box (4) is configured such that during loading and unloading, the large input shaft rotates, while the small input shaft does not rotate.

10. The dual-speed driving electrode pull rod device according to claim 1, characterized in that: The differential gearbox (4) is configured such that, during smelting, the large input shaft does not rotate, but the small input shaft rotates.

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