A method and apparatus for testing the swaying of a tungsten wire rope

Abstract

This invention provides a sway testing device and method, relating to the field of tungsten wire rope testing technology. The testing method includes: performing a sway test on the tungsten wire rope to be tested, obtaining the stopping sway time t1 of the tungsten wire rope to be tested; performing a sway test on a qualified tungsten wire rope, obtaining the qualified stopping sway time t0 of the tungsten wire rope; determining whether t1 is less than or equal to t0; if yes, the quality of the tungsten wire rope to be tested is qualified; if no, the quality of the tungsten wire rope to be tested is unqualified. By performing a sway test on the tungsten wire rope to be tested, the performance of the tungsten wire rope is judged solely by the stopping sway time t1 of the tungsten wire rope to be tested and the stopping sway time t0 of a qualified tungsten wire rope. The test results are only related to time and are not affected by external forces. The test data is true and reliable, and the method is highly practical.

Description

Technical Field

[0001] This invention relates to the field of tungsten wire rope testing technology, and in particular to a method and apparatus for testing the swaying of tungsten wire ropes. Background Technology

[0002] The primary method for producing monocrystalline silicon is the Czochralski method. During production, crystal oscillation is a common anomaly in the Czochralski method. Crystal oscillation affects the normal growth of the monocrystalline silicon, impacts production efficiency, and increases production costs. Therefore, it is necessary to conduct oscillation tests on the tungsten wire rope beforehand.

[0003] Existing methods for testing the sway of tungsten wire ropes include: suspending a weight at one end of the wire rope; using a rotary motor to drive the weight to rotate around the central axis via the tungsten wire rope; and recording the difference in weight movement at different points using a dial indicator. However, when the weight sways, the impact on the dial indicator's pointer causes a reaction force on the counterweight due to stroke control limitations, affecting the weight's sway and preventing the dial indicator from recording the actual sway data.

[0004] In view of this, a new technical solution is needed to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a method and device for testing the swaying of tungsten wire ropes, and the test data is authentic and reliable.

[0006] To achieve the above objectives, the present invention employs the following technical means:

[0007] The first aspect of this invention discloses a method for testing the swaying of a tungsten wire rope, comprising:

[0008] A swaying test is performed on the tungsten wire rope to be tested to obtain the stopping sway time t1 of the tungsten wire rope to be tested;

[0009] A sway test is performed on the qualified tungsten wire rope to obtain the qualified stopping sway time t0 of the tungsten wire rope;

[0010] Determine if t1 is less than or equal to t0;

[0011] If yes, the tungsten wire rope to be tested is of qualified quality; if no, the tungsten wire rope to be tested is of unqualified quality.

[0012] Optionally, during the shaking test, the weight rotates around the tungsten wire rope as an axis while swinging along an arc.

[0013] Optionally, the step of performing a sway test on the tungsten wire rope to be tested and obtaining the stopping sway time t1 of the tungsten wire rope to be tested includes:

[0014] One end of the tungsten wire rope to be tested is suspended from the rotating motor, and the weight is suspended from the other end of the tungsten wire rope to be tested.

[0015] Adjust the weights to deviate from the central axis;

[0016] Start the rotary motor and release the weights at the same time. The weights begin to rotate around the tungsten wire rope to be tested and swing along an arc until they stop swinging.

[0017] Record the time t1 from the start of the weight swing to the stop of the swing.

[0018] Optionally, the step of performing a sway test on the qualified tungsten wire rope to obtain the qualified stopping sway time t0 of the tungsten wire rope includes:

[0019] A swaying test was conducted on multiple sets of tungsten wire ropes, and the time t2 from the start of swaying to the stop of swaying for each set of tungsten wire ropes was recorded.

[0020] Take the maximum value t2max of t2 and use t2max as the qualified stopping time t0 for the tungsten wire rope.

[0021] Optionally, the swaying test is performed on multiple sets of qualified tungsten wire ropes, and the time t2 from the start of swaying to the stop of swaying for each set of tungsten wire ropes is recorded, wherein the swaying test for each set of qualified tungsten wire ropes includes:

[0022] Suspend one end of a qualified tungsten wire rope on a rotating motor, and suspend the weight at the other end of the qualified tungsten wire rope.

[0023] Adjust the weights to deviate from the central axis;

[0024] Start the rotary motor and release the weights at the same time. The weights will start to rotate around the qualified tungsten wire rope as an axis and swing along an arc until they stop swinging.

[0025] Record the time t2 from the start of the swing to the stop of the swing for each set of weights.

[0026] Optionally, the shaking test is performed on multiple sets of tungsten wire ropes, and the time t2 from the start of shaking to the stop of shaking for each set of tungsten wire ropes is recorded. Multiple shaking tests are performed using one shaking test device, or multiple shaking test devices are used, with each shaking test device performing at least one shaking test.

[0027] Optionally, the tungsten wire rope to be tested includes an inner layer and an outer layer, with the outer layer wrapped around the inner layer; the qualified tungsten wire rope includes an inner layer and an outer layer, with the outer layer wrapped around the inner layer.

[0028] Optionally, t0 = 20 min, the length of the tungsten wire rope to be tested is L1, L1 = 3.2 m, and the distance of the weight off the central axis is L2, L2 = 0.28 m.

[0029] Optionally, the rotational speed of the rotary motor is V, where V = 10 r / min, and the weight of the weight is m, where m = 130 N.

[0030] A second aspect of the present invention discloses a tungsten wire rope swaying test device, comprising:

[0031] frame;

[0032] A rotary motor, wherein the rotary motor is disposed at the top of the frame;

[0033] Weights, the weights being connected to the rotary motor via tungsten wire ropes; and

[0034] A timer, used to record the time from when the weight starts to swing until it stops swinging.

[0035] Compared with existing technologies, the present invention brings the following technical effects:

[0036] The sway test method of the tungsten wire rope of the present invention judges the performance of the tungsten wire rope by performing a sway test on the tungsten wire rope to be tested and by comparing the stopping sway time t1 of the tungsten wire rope to the stopping sway time t0 of the qualified tungsten wire rope. The test results are only related to time and are not affected by external forces. The test data are true and reliable and have strong practicality. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 A schematic diagram of the tungsten wire rope structure is shown;

[0039] Figure 2 A flowchart of a tungsten wire rope swaying test method according to an embodiment of the present invention is shown;

[0040] Figure 3 It shows Figure 2 A flowchart detailing the specific steps of step s1;

[0041] Figure 4 It shows Figure 2 A schematic diagram of the first motion state of the weights in step 1.

[0042] Figure 5 It shows Figure 2 A schematic diagram of the first motion state of the weights in step 1.

[0043] Figure 6It shows Figure 2 A flowchart detailing the specific steps of step s2;

[0044] Figure 7 It shows Figure 6 A flowchart detailing the specific steps of step s11;

[0045] Figure 8 A schematic diagram of the tungsten wire rope swaying test device according to an embodiment of the present invention is shown.

[0046] Explanation of key component symbols:

[0047] 1-Frame; 2-Rotating motor; 3-Tungsten wire rope; 31-Outer layer; 32-Inner layer; 4-Weight; 5-Timer. Detailed Implementation

[0048] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0050] The actual production of silicon single crystal ingots requires a single crystal pulling process. Single crystal pulling often employs the Czochralski (CZ) method. Specifically, the Czochralski method includes:

[0051] A crystal nucleus is installed at the lower end of the lifting rod, the first drive unit of the drive device is turned on, and the lifting rod is slowly lowered by tungsten wire rope until the lower end of the lifting rod enters the molten body.

[0052] When the first drive unit of the drive device is turned off and the second drive unit is turned on, the lifting rod slowly rotates while crystals begin to form on it until the crystals gradually grow larger.

[0053] The first and second drive sections of the drive unit are activated, causing the lifting rod to rise while rotating horizontally, pulling out the crystals to form a silicon single crystal ingot. Therefore, the mechanical properties of the tungsten wire rope itself directly affect the production quality of the silicon single crystal ingot.

[0054] In this embodiment, the tungsten wire ropes all have an inner and outer braided structure. Please refer to [link / reference]. Figure 1 The direction of the torque is as follows Figure 1As shown by the middle arrow, the direction of the torque on the inner layer is opposite to the direction of the torque on the outer layer. When the torsional torques of the inner and outer layers of the tungsten wire rope cannot be completely balanced, the crystal often exhibits abnormal arc-drawing phenomena, such as oscillation or circular motion.

[0055] Abnormal arc drawing significantly impacts the production efficiency of single-crystal silicon. Therefore, before producing single-crystal silicon ingots, tungsten wire ropes must be specifically tested to select those with qualified mechanical properties.

[0056] Example 1

[0057] Please see Figure 2 This embodiment discloses a method for testing the swaying of a tungsten wire rope, including:

[0058] Step s1: Perform a sway test on the tungsten wire rope to be tested and obtain the stopping sway time t1 of the tungsten wire rope to be tested;

[0059] Step s2: Perform a sway test on the qualified tungsten wire rope to obtain the qualified stopping sway time t0 of the tungsten wire rope;

[0060] Step s4: Determine whether t1 is less than or equal to t0;

[0061] If step s5 is yes, the quality of the tungsten wire rope to be tested is qualified; if step s6 is no, the quality of the tungsten wire rope to be tested is unqualified.

[0062] By conducting a sway test on the tungsten wire rope under test, the performance of the tungsten wire rope is judged solely by the stopping sway time t1 of the tungsten wire rope under test and the stopping sway time t0 of the qualified tungsten wire rope. The test results are only related to time and are not affected by external forces. The test data is true, reliable and highly practical.

[0063] In one specific implementation, during the shaking test, the weight rotates around a tungsten wire rope as an axis while swinging along an arc.

[0064] This sway test can be used on both tungsten wire ropes under test and qualified tungsten wire ropes.

[0065] It is only convenient to record the time from the start of the swing to the stop of the swing when the weight is swinging in an arc.

[0066] Example 2

[0067] This embodiment discloses the specific steps of step s1 in embodiment 1: performing a sway test on the tungsten wire rope to be tested and obtaining the stopping sway time t1 of the tungsten wire rope to be tested.

[0068] Please see Figure 3 The specific steps include:

[0069] Step s11: Suspend one end of the tungsten wire rope to be tested on the rotary motor, and suspend the weight on the other end of the tungsten wire rope to be tested;

[0070] Step s12: Adjust the weights to deviate from the central axis;

[0071] Step s13: Start the rotary motor and release the weights at the same time. The weights will start to rotate around the tungsten wire rope to be tested as an axis and swing along an arc until they stop swinging.

[0072] Step s14: Record the time t1 from the start of the swing to the stop of the swing of the weight.

[0073] To improve mechanical strength and prevent breakage during single crystal pulling, tungsten wire ropes are all made with a double-layer braided structure consisting of an inner and outer layer.

[0074] In step s13, the weight has a first motion stage and a second motion stage, and gradually moves from the first motion stage to the second motion stage.

[0075] For details, please refer to Figure 3 The first stage of motion is as follows: after starting the rotary motor and releasing the weight at the same time, the weight will swing back and forth along the arc y while rotating around the tungsten wire rope to be tested as the axis of rotation under the drive of the rotary motor.

[0076] Points a and c are the two endpoints of arc y. Arc y intersects the central axis x at point b.

[0077] After the external force is removed, the swing amplitude of the weight will gradually decrease under the action of air resistance until it enters the second state of motion.

[0078] For details, please refer to Figure 4 The second motion state of the weight is as follows: the tungsten wire rope to be tested coincides with the central axis x, the weight stops swinging, and only rotates around the tungsten wire rope to be tested at point b.

[0079] Step s1: Perform a sway test on the tungsten wire rope to be tested, and obtain the experimental data of the stopping sway time t1 of the tungsten wire rope to be tested as follows:

[0080]

[0081] The applicant used five sets of tungsten wire ropes to be tested, and used the same product model, sample length L1, swing distance L2, weight m, and motor speed v of the rotating motor to control variables.

[0082] It should be noted that the tungsten wire rope in this table refers to the tungsten wire rope to be tested. Please refer to [link / reference]. Figure 3 The swing distance L2 is the minimum distance of the weight from the central axis x in its initial state.

[0083] As shown in the table, the stopping time of the first to fifth groups gradually decreases, indicating that the anti-sway performance of the tungsten wire rope under test is gradually enhanced, and its performance is more stable under straight pull.

[0084] The principle behind this is explained as follows:

[0085] According to Newton's first law, any object remains at rest or in uniform motion in a straight line unless compelled to change its state of motion by an external force.

[0086] The applicant's adjustment of the weights off-center essentially applies an external force to them. When the weights are released, this external force disappears, and the weights tend to return to their stationary state in the direction of their swing.

[0087] If the torsional torques of the inner and outer layers of the tungsten wire rope are balanced, the weight will be under balanced force and will stop swinging quickly under the action of air resistance. If the torques of the inner and outer layers of the tungsten wire rope are unbalanced, the weight will be under uneven force and will swing irregularly in an arc. In this case, air resistance will be required for a longer period of time, meaning the weight will take a longer time to stop swinging.

[0088] Therefore, the applicant can determine the swaying performance of the tungsten wire rope under test by the time t1 when the weight stops swinging.

[0089] Example 3

[0090] This embodiment discloses the specific steps of step s2: performing a sway test on a qualified tungsten wire rope to obtain the qualified stopping sway time t0 of the tungsten wire rope.

[0091] Please see Figure 6 The specific steps include:

[0092] Step s21: Perform a sway test on multiple sets of tungsten wire ropes and record the time t2 from the start of swaying to the stop of swaying for each set of tungsten wire ropes;

[0093] Step s22: Take the maximum value t2max of t2 and use t2max as the qualified stopping swing time t0 of the tungsten wire rope.

[0094] To ensure mechanical strength and prevent breakage during single crystal pulling, the tungsten wire rope adopts a double-layer braided structure with an inner and outer layer.

[0095] In Example 2, the applicant could only make a qualitative judgment on the tungsten wire rope under test through experiments, but could not perform quantitative analysis. By obtaining the qualified stopping swing time t0 of the tungsten wire rope, a qualified standard can be set for the tungsten wire rope under test, that is, a quantitative standard can be given to the tungsten wire rope under test.

[0096] Please see Figure 7 In one specific implementation, step s21: A sway test is performed on multiple sets of qualified tungsten wire ropes, and the time t2 from the start of swaying to the stop of swaying for each set of tungsten wire ropes is recorded. The sway test for each set of qualified tungsten wire ropes includes:

[0097] Step s211: Suspend one end of the qualified tungsten wire rope on the rotating motor, and suspend the weight on the other end of the qualified tungsten wire rope;

[0098] Step s212: Adjust the weights to deviate from the central axis;

[0099] Step s213: Start the rotary motor and release the weight at the same time. The weight will start to rotate around the qualified tungsten wire rope as the axis and swing along the arc until it stops swinging.

[0100] Step s214: Record the time t2 from the start of the swing to the stop of the swing for each set of weights.

[0101] Steps s211 to s214 are largely the same as steps s11 to s14 in Example 2, except that the experimental object in steps s211 to s214 is a qualified tungsten wire rope, while the experimental object in steps s11 to s14 is a tungsten wire rope to be tested.

[0102] The experimental data for step s21 are as follows:

[0103]

[0104]

[0105] The applicant conducted a sway test on the five sets of qualified tungsten wire ropes. The product model, motor speed V, tungsten wire rope length L1, swing distance L2, and weight m of the weights were kept constant.

[0106] Among them, the maximum stopping time t2 for the fifth group is 20 minutes. Therefore, t2max is 20 minutes.

[0107] The experimental data shows that the maximum actual stopping time t2 for the fourth and fifth groups is 20 minutes. Therefore, it can be inferred that the stopping time t0 for a qualified product is 20 minutes, and the stopping time t0 for a qualified tungsten wire rope is also 20 minutes.

[0108] It should be noted that the experimental data is for illustrative purposes only. The measured value is the time t0 during which the product stops oscillating. As the number of experimental groups increases, the measured value will get closer and closer to the true value.

[0109] The table below illustrates the relationship between the stopping swing time t1 of the tungsten wire rope to be tested, the stopping swing time t0 of the qualified tungsten wire rope, and the qualification of the product.

[0110]

[0111] Therefore, it can be concluded that the stopping swing time t1 of the tungsten wire ropes to be tested in the first, second, and third groups is greater than the stopping swing time t0 of the qualified tungsten wire rope. Thus, the tungsten wire ropes to be tested in the first, second, and third groups are unqualified.

[0112] The tungsten wire ropes in groups four and five have a stopping swing time t1 that is less than or equal to the stopping swing time t0 that is considered acceptable. Therefore, the tungsten wire ropes in groups four and five are considered acceptable.

[0113] Example 4

[0114] Please see Figure 8 This embodiment discloses a tungsten wire rope swaying test device. This device can be used in Embodiment 2 to obtain the stopping swaying time t1 of the tungsten wire rope under test. It can also be used in Embodiment 3 to determine the qualified stopping swaying time t0 of the tungsten wire rope.

[0115] The tungsten wire rope sway testing device includes:

[0116] Rack 1;

[0117] Rotary motor 2 is located at the top of frame 1;

[0118] Weight 4, weight 4 is connected to rotary motor 3 via tungsten wire rope 3; and

[0119] Timer 5 is used to record the time from when weight 4 starts to swing until it stops swinging.

[0120] The timer 5 is mounted on the frame 1 so that the applicant can easily record the time when the weight 4 stops swinging. The timer 5 can also be mounted separately outside the frame 1.

[0121] By setting timer 5, the time from when weight 4 starts to swing to when it stops is recorded, thus obtaining test data. The test data is not affected by any force and is stable and reliable.

[0122] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom still fall within the scope of protection of this invention.

Claims

1. A method for testing the swaying of a tungsten wire rope, characterized in that, include: A swaying test is performed on the tungsten wire rope to be tested to obtain the stopping sway time t1 of the tungsten wire rope to be tested; A sway test is performed on the qualified tungsten wire rope to obtain the qualified stopping sway time t0 of the tungsten wire rope; Determine if t1 is less than or equal to t0; If yes, the tungsten wire rope to be tested is of qualified quality; if no, the tungsten wire rope to be tested is of unqualified quality. During the shaking test, the weight rotates around the tungsten wire rope as an axis while swinging along an arc; The step of performing a sway test on the tungsten wire rope to be tested and obtaining the stopping sway time t1 of the tungsten wire rope to be tested includes: One end of the tungsten wire rope to be tested is suspended from the rotating motor, and the weight is suspended from the other end of the tungsten wire rope to be tested. Adjust the weights to deviate from the central axis; Start the rotary motor and release the weights at the same time. The weights begin to rotate around the tungsten wire rope to be tested and swing along an arc until they stop swinging. Record the time t1 from the start of the weight's swing to its stop; The step of performing a sway test on a qualified tungsten wire rope to obtain the qualified stopping sway time t0 of the tungsten wire rope includes: A swaying test was conducted on multiple sets of tungsten wire ropes, and the time t2 from the start of swaying to the stop of swaying for each set of tungsten wire ropes was recorded. Take the maximum value t2max of t2 and use t2max as the qualified stopping time t0 for the tungsten wire rope.

2. The tungsten wire rope sway test method according to any one of claims 1, characterized in that, The step of performing a sway test on multiple sets of tungsten wire ropes and recording the time t2 from the start of swaying to the stop of swaying for each set of tungsten wire ropes includes: Suspend one end of a qualified tungsten wire rope on a rotating motor, and suspend the weight at the other end of the qualified tungsten wire rope. Adjust the weights to deviate from the central axis; Start the rotary motor and release the weights at the same time. The weights will start to rotate around the qualified tungsten wire rope as an axis and swing along an arc until they stop swinging. Record the time t2 from the start of the swing to the stop of the swing for each set of weights.

3. The tungsten wire rope sway test method according to claim 1, characterized in that, The step of performing a sway test on multiple sets of tungsten wire ropes and recording the time t2 from the start of swaying to the stop of swaying for each set of tungsten wire ropes includes: using one sway test device to perform multiple sway tests, or using multiple sway test devices, with each sway test device performing at least one sway test.

4. The tungsten wire rope sway test method according to claim 1, characterized in that, The tungsten wire rope to be tested includes an inner layer and an outer layer, with the outer layer wrapped around the inner layer; the qualified tungsten wire rope includes an inner layer and an outer layer, with the outer layer wrapped around the inner layer.

5. The tungsten wire rope sway test method according to claim 1, characterized in that, t0 = 20 min, the length of the tungsten wire rope to be tested is L1, L1 = 3.2 m, and the distance of the weight off the central axis is L2, L2 = 0.28 m.

6. The tungsten wire rope sway test method according to claim 1, characterized in that, The rotational speed of the rotary motor is V, where V = 10 r / min, and the weight of the weight is m, where m = 130 N.

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