Rotor online dynamic balancing method, device and computer equipment

Abstract

This invention discloses a method, apparatus, and computer device for online dynamic balancing of a rotor. The method includes: determining a balancing speed based on a pre-acquired first vibration value and a first preset threshold of the rotor, wherein the first vibration value is the vibration value of the rotor before online dynamic balancing; determining the mass of a test counterweight of the rotor based on the first vibration value, a second preset threshold, the radius of a pre-acquired test counterweight, a preset impact force, and the balancing speed; adding a test counterweight of the same mass as the test counterweight to the rotor and rotating the rotor to the balancing speed to obtain a second vibration value; and completing the online dynamic balancing of the rotor if the second vibration value is less than or equal to the second preset threshold, wherein the second preset threshold is less than the first preset threshold.

Description

Technical Field

[0001] This invention relates to the field of rotor dynamic balancing technology, specifically to an online rotor dynamic balancing method, apparatus, and computer equipment. Background Technology

[0002] Even after dynamic balancing of rotor components, the rotor may still experience excessive vibration due to factors such as high speed, high load, and high temperature. In such cases, the problem of excessive rotor vibration can be resolved by performing on-site online dynamic balancing of the rotor.

[0003] In existing technologies, the influence coefficient method is generally used to perform online dynamic balancing of the rotor. However, when using the influence coefficient method to perform online dynamic balancing of the rotor, specialized software and equipment are usually required. Therefore, under certain limited conditions, the rotor cannot be balanced due to a lack of necessary equipment. Summary of the Invention

[0004] Therefore, to address the shortcomings of the prior art, embodiments of the present invention provide a rotor online dynamic balancing method, apparatus, and computer equipment.

[0005] According to a first aspect, embodiments of the present invention disclose a rotor online dynamic balancing method, comprising:

[0006] The balancing speed is determined based on the first vibration value of the rotor and the first preset threshold value, where the first vibration value is the vibration value of the rotor when no online dynamic balancing is performed.

[0007] The mass of the test counterweight of the rotor is determined based on the first vibration value, the second preset threshold, the radius of the pre-acquired test counterweight, the preset impact force, and the balancing speed.

[0008] Add a test counterweight of the same mass as the test counterweight to the rotor, and rotate the rotor to the equilibrium speed to obtain the second vibration value;

[0009] If the second vibration value is less than or equal to the second preset threshold, the online dynamic balancing of the rotor is completed. The second preset threshold is less than the first preset threshold.

[0010] Optionally, if the second vibration value is greater than a second preset threshold and less than a third preset threshold, and the first preset threshold is less than the third preset threshold, the method further includes:

[0011] Record the initial phase angle of the rotor when the trial counterweight is added;

[0012] The vibration ratio is determined based on the first vibration value and the second vibration value.

[0013] Based on the vibration ratio and the mapping relationship between the vibration ratio and the phase angle, determine the first phase angle to be adjusted for the trial counterweight;

[0014] After adjusting the position of the test counterweight to the first target position according to the first phase angle, rotate the rotor and reach the equilibrium speed, and record the third vibration value. The first target position is the position of the test counterweight after rotating from the initial phase angle to the first phase angle.

[0015] If the third vibration value is less than or equal to the second preset threshold, the online dynamic balancing of the rotor is completed.

[0016] Optionally, if the third vibration value is greater than a third preset threshold, the method further includes:

[0017] Determine the second phase angle, and adjust the test counterweight to the second target position according to the second phase angle. This completes the online dynamic balancing of the rotor. The second target position is the position of the test counterweight after adjusting the second phase angle from the first target position.

[0018] Optionally, if the second vibration value is greater than a third preset threshold, the method further includes:

[0019] Determine the third phase angle, and adjust the test counterweight to the third target position based on the third phase angle. This completes the online dynamic balancing of the rotor. The third target position is the position of the test counterweight after rotating from the initial phase angle to the third phase angle.

[0020] Optionally, the mass of the rotor's test counterweight is determined based on the first vibration value, the second preset threshold, the radius of the pre-acquired test counterweight, the preset impact force, and the balancing speed, specifically including:

[0021] Obtain the transfer function between the vibration value of the rotor when it is struck by a preset striking force and the preset striking force;

[0022] Based on the first vibration value and the second preset threshold, determine the fourth vibration value induced by the mass stress of the test counterweight;

[0023] The mass of the test counterweight is determined based on the fourth vibration value, the transfer function, the radius of the test counterweight, and the balancing speed.

[0024] Optionally, the balance speed is determined based on the pre-acquired first vibration value of the rotor and a first preset threshold, specifically including:

[0025] If the first vibration value is less than the first preset threshold, the rotational speed corresponding to the maximum value of the first vibration value of the rotor is determined to be the equilibrium rotational speed.

[0026] or

[0027] If the first vibration value is greater than or equal to the first preset threshold, then the rotational speed corresponding to the vibration value of the rotor at the first preset threshold is determined to be the equilibrium rotational speed.

[0028] According to a second aspect, embodiments of the present invention also disclose a rotor online dynamic balancing device, comprising:

[0029] The rotational speed determination module is used to determine the balance rotational speed based on the pre-acquired first vibration value of the rotor and a first preset threshold. The first vibration value is the vibration value of the rotor when it has not been dynamically balanced online.

[0030] The mass determination module is used to determine the mass of the rotor's test counterweight based on the first vibration value, the second preset threshold, the radius of the pre-acquired test counterweight, the preset impact force, and the balancing speed.

[0031] The acquisition module is used to add a test counterweight of the same mass as the test counterweight to the rotor, rotate the rotor to the equilibrium speed, and acquire the second vibration value;

[0032] The verification module is used to complete the online dynamic balancing of the rotor if the second vibration value is less than or equal to the second preset threshold, wherein the second preset threshold is less than the first preset threshold.

[0033] Optionally, if the second vibration value in the verification module is greater than a second preset threshold and less than a third preset threshold, and the second preset threshold is less than a first preset threshold and less than a third preset threshold, the device further includes:

[0034] The recording module is used to record the initial phase angle of the rotor when the trial counterweight is added;

[0035] The ratio determination module is used to determine the vibration ratio based on the first vibration value and the second vibration value;

[0036] The phase angle determination module is used to determine the first phase angle to be adjusted for the trial counterweight based on the vibration ratio and the mapping relationship between the vibration ratio and the phase angle.

[0037] The balancing module is used to adjust the position of the test counterweight to the first target position according to the first phase angle, then rotate the rotor to reach the balance speed, and record the third vibration value. The first target position is the position of the test counterweight after rotating from the initial phase angle to the first phase angle.

[0038] The verification submodule is used to complete the online dynamic balancing of the rotor if the third vibration value is less than or equal to the second preset threshold.

[0039] According to a third aspect, embodiments of the present invention also disclose a computer device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to cause the at least one processor to perform the steps of the rotor online dynamic balancing method as described in the first aspect or any optional embodiment of the first aspect.

[0040] According to a fourth aspect, embodiments of the present invention also disclose a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the rotor online dynamic balancing method as described in the first aspect or any optional embodiment of the first aspect.

[0041] The technical solution of this invention has the following advantages:

[0042] The present invention provides a rotor online dynamic balancing method, apparatus, and computer equipment, comprising: determining a balancing speed based on a pre-acquired first vibration value of the rotor and a first preset threshold, wherein the first vibration value is the vibration value of the rotor before online dynamic balancing. After determining the first vibration value, the mass of the added trial counterweight can be better determined based on the first vibration value, thereby avoiding the problem of insufficient trial counterweight mass in the prior art, and the need to modify the balancing speed again after determining the balancing speed, avoiding the problem of multiple adjustments to the balancing speed in the prior art; furthermore, determining the mass of the trial counterweight to be added to the rotor based on the first vibration value, a second preset threshold, the radius of the pre-acquired trial counterweight, a preset impact force, and the balancing speed, avoiding excessive trial counterweight mass, which could cause irreversible damage to the rotor during online dynamic balancing; finally, after determining the mass of the trial counterweight, performing online dynamic balancing on the rotor, and determining whether the online dynamic balancing of the rotor is completed based on the second vibration value of the rotor after adding the trial counterweight during the dynamic balancing process, which can further ensure the effectiveness of online dynamic balancing. Attached Figure Description

[0043] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0044] Figure 1 This is a flowchart illustrating a specific example of the rotor online dynamic balancing method in this invention.

[0045] Figure 2 This is a schematic diagram illustrating a specific example of the online dynamic balancing method for rotors in an embodiment of the present invention;

[0046] Figure 3 This is a schematic diagram illustrating a specific example of the online dynamic balancing method for rotors in an embodiment of the present invention;

[0047] Figure 4 This is a schematic block diagram of a specific example of an online dynamic balancing device for rotors in an embodiment of the present invention;

[0048] Figure 5 This is a specific example diagram of a computer device in an embodiment of the present invention. Detailed Implementation

[0049] 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.

[0050] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] 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.

[0053] In-line dynamic balancing of the rotor:

[0054] Step 1: Initially run the rotor to obtain the Bode diagram of the rotor.

[0055] Step 2: Select the balance speed based on the response curve in the rotor's Bode plot.

[0056] Step 3: Apply a trial counterweight to the rotor's balance section, run the rotor to the balance speed, and measure the rotor's Bode plot under this condition. If the rotor cannot reach the balance speed after adding the trial counterweight, the position of the trial counterweight needs to be adjusted, or Step 2 needs to be repeated to select a new balance speed.

[0057] Step 4: Run the calculation program of the vibration analyzer to calculate the magnitude and phase of the correction mass.

[0058] Step 5: Adjust the size and phase of the counterweight according to the calculation results, and run the rotor to check the rotor's balance. If the rotor vibration still does not meet the standard after applying the corrective mass, the rotor needs to be rebalanced starting from step 1.

[0059] The implementation process in the above-mentioned prior art has the following main problems:

[0060] (1) The on-site dynamic balancing of the rotor requires the use of a professional vibration data analyzer. In case of emergencies or if the test site is not equipped with a vibration data analyzer, it will be difficult to carry out dynamic balancing work on the rotor.

[0061] (2) Professional vibration data analyzers are expensive and have very high operating costs.

[0062] (3) When using a vibration data analyzer to perform dynamic balancing on the rotor, applying too much or too little test weight will affect the calculation results of the correction quality. If the test results are not ideal, the balancing operation needs to be repeated according to the balancing procedure.

[0063] (4) The accuracy of the weight calculation of the correction mass is not high, and the test results do not meet the expected calculation. The weight of the correction mass can only be gradually adjusted to make the rotor vibration meet the engineering requirements.

[0064] To address the technical problems mentioned in the background section, this application provides a rotor online dynamic balancing method, as detailed in the following embodiments. Figure 1 As shown, the method includes the following steps:

[0065] Step 101: Determine the balance speed based on the first vibration value of the rotor and the first preset threshold value.

[0066] The first vibration value is the vibration value of the rotor when it has not been dynamically balanced online.

[0067] For example, the first vibration value is the vibration that needs to be balanced after the rotor has undergone online dynamic balancing. This first vibration value can be obtained by means of existing technology, which will not be elaborated here.

[0068] In this embodiment, the first preset threshold is selected as 1.3 times the rotor vibration standard value. The vibration standard value is based on ISO 1940, where the rotor dynamic balance level for a "new machine" is G2.5; and on VDI 2056, where the vibration assessment standard value for a "new machine" during operation is 2.8 mm / s. This application does not limit the size of the first preset threshold; those skilled in the art can determine it based on actual conditions.

[0069] Based on the relationship between the first vibration value and the first preset threshold, the rotational speed corresponding to the vibration value is determined as the equilibrium rotational speed. Those skilled in the art can determine this based on the actual situation.

[0070] In a preferred embodiment, determining the balance speed based on a pre-acquired first vibration value of the rotor and a first preset threshold specifically includes:

[0071] If the first vibration value is less than the first preset threshold, the rotational speed corresponding to the maximum value of the first vibration value of the rotor is determined to be the equilibrium rotational speed.

[0072] or

[0073] If the first vibration value is greater than or equal to the first preset threshold, then the rotational speed corresponding to the vibration value of the rotor at the first preset threshold is determined to be the equilibrium rotational speed.

[0074] For example, the process of determining the balancing speed includes two cases. One is that the first vibration value generated by the rotor during normal operation is less than the first preset threshold. In this case, the speed corresponding to the maximum first vibration value is selected as the balancing speed. The second case is that the balancing speed is when the first vibration value is greater than or equal to the first preset threshold. The speed corresponding to the rotor vibration at the first preset threshold is selected as the balancing speed.

[0075] Step 102: Determine the mass of the rotor's test counterweight based on the first vibration vector, the second preset threshold, the radius of the pre-acquired test counterweight, the preset impact force, and the balancing speed.

[0076] For example, the standard for determining the mass of the test counterweight is: the resultant force formed by the vibration value excited by the mass of the test counterweight (the vibration vector excited by the test counterweight) and the first vibration value (the vibration vector excited by the rotor imbalance) does not exceed the vibration standard. For details, see [link to relevant documentation]. Figure 2 The resultant force OC in the middle. This can effectively reduce the first vibration value to within the standard vibration range.

[0077] In a preferred embodiment, the test weight mass of the rotor is determined based on a first vibration value, a second preset threshold, the radius of the pre-acquired test weight, a preset impact force, and a balancing speed, specifically including:

[0078] Obtain the transfer function between the vibration value of the rotor when it is struck by a preset striking force and the preset striking force;

[0079] Based on the first vibration value and the second preset threshold, determine the fourth vibration value induced by the mass stress of the test counterweight;

[0080] The mass of the test counterweight is determined based on the fourth vibration value, the transfer function, the radius of the test counterweight, and the balancing speed.

[0081] For example, the transfer function between the vibration value when the rotor is struck under a preset striking force and the preset striking force is as follows:

[0082] A = f(F) or F = f -1 (A)=g(A) (1)

[0083] Where A is the vibration value generated by the striking force on the rotor; F is the excitation force of the equilibrium surface, where A is obtained from the striking experiment.

[0084] The relationship between the excitation force F on the equilibrium surface and the mass of the trial counterweight is as follows:

[0085]

[0086] Where r is the radius of the added trial weight; is the rotor speed, also known as the balancing speed; m is the mass of the trial counterweight.

[0087] Substituting equation (2) into equation (1) yields:

[0088]

[0089] From equation (3), we can obtain

[0090]

[0091] When the value of A is chosen as OB, the corresponding effective balance angle is the largest. OB can be calculated according to... Figure 2 The force analysis is performed to calculate the force.

[0092] Preferably, A(OB) is determined as follows:

[0093] like Figure 2 As shown, let ⊙O be the standard vibration circle, OA be the first vibration value excited by the initial imbalance of the rotor, OB be the vibration value excited by the trial counterweight (assuming force analysis is performed during the process), and OC be the rotor vibration value (resultant force) after the trial counterweight is applied. When OC is inside or on ⊙O, the rotor balance meets the requirements.

[0094] Depend on Figure 2 It can be seen that the effective balance angle is largest when AC is tangent to ⊙O (when the rotor vibration is less than 1.3 times the vibration standard value, the effective balance angle will be larger, and the vibration over-limit angle will be smaller, but the angle between the effective balance angle and the vibration over-limit angle will first gradually increase and then gradually decrease, with a maximum value of 127). As long as the trial counterweight is applied within this angle range, the rotor vibration can meet the standard. Therefore, we can obtain: OB 2 =AC 2 =OA 2 -OC 2 .

[0095] In other words: This allows us to determine the mass of the trial weight.

[0096] Step 103: Add a test counterweight of the same mass and size as the test counterweight to the rotor, and rotate the rotor to the equilibrium speed to obtain the second vibration value.

[0097] Step 104: If the second vibration value is less than or equal to the second preset threshold, the online dynamic balancing of the rotor is completed. The second preset threshold is less than the first preset threshold.

[0098] For example, after determining the mass of the test counterweight for the rotor, the test counterweight of the corresponding mass is added to the rotor, and the rotor is rotated to the equilibrium speed to obtain the second vibration value of the rotor.

[0099] If the second vibration value is less than or equal to the second preset threshold, it indicates that the position of the test counterweight is correct and the rotor has reached dynamic balance. The second preset threshold is the value corresponding to the vibration standard of the rotor during operation. In this embodiment, the corresponding second preset threshold is 2.8 mm / s.

[0100] Once dynamic equilibrium is achieved, related operations can continue. If imbalance recurs during the operation, the above method can be used again for online dynamic balancing.

[0101] Based on the above embodiments, this invention also provides another rotor online dynamic balancing method. The content already described in the above embodiments will not be repeated here. In this embodiment, considering that if the second vibration value is greater than a second preset threshold and less than a third preset threshold, wherein the first preset threshold is less than the third preset threshold, the method further includes:

[0102] Record the initial phase angle of the rotor when the trial counterweight is added;

[0103] The vibration ratio is determined based on the first vibration value and the second vibration value.

[0104] Based on the vibration ratio and the mapping relationship between the vibration ratio and the phase angle, determine the first phase angle to be adjusted for the trial counterweight;

[0105] After adjusting the position of the test counterweight to the first target position according to the first phase angle, rotate the rotor and reach the equilibrium speed, and record the third vibration value. The first target position is the position of the test counterweight after rotating from the initial phase angle to the first phase angle.

[0106] If the third vibration value is less than or equal to the second preset threshold, the online dynamic balancing of the rotor is completed.

[0107] For example, when the second vibration value is greater than the second preset threshold, there are two corresponding cases: one is that the second vibration value is greater than the second preset threshold but less than the third preset threshold; the second is that the second vibration value is greater than the third preset threshold. The third preset threshold indicates that if the rotor's vibration value exceeds this value, the rotor will malfunction or become inoperable if it continues to operate. In this embodiment, the third preset threshold corresponds to twice the vibration standard, which is 2 × 2.8 mm / s. Of course, those skilled in the art can set the values ​​of the first preset threshold (1.3 times the vibration standard), the second preset threshold (vibration standard), and the third preset threshold (vibration limit, twice the vibration standard) according to actual conditions.

[0108] like Figure 3 As shown, the second preset threshold corresponds to the vibration standard circle, and the third preset threshold corresponds to the vibration limitation circle. Figure 3 The circle between the three concentric circles in the middle is a schematic diagram of the rotor's vibration value being between the second and third preset thresholds (or it can be said to be a schematic diagram of the rotor being at the first preset threshold). The circle on the left is the corresponding force analysis diagram. At this time, the effective equilibrium angle is 101°, and the vibration over-limit angle is 83°. If the rotor vibration exceeds the limit after applying the test counterweight (the judgment of exceeding the limit can be directly judged by the vibration value), simply rotate the test counterweight 180° to bring the test counterweight into the effective equilibrium angle range and complete the balancing operation.

[0109] For the first case, if the second vibration value is greater than the second preset threshold and less than the third preset threshold, the phase angle corresponding to the test weight is determined according to the ratio (a) of the second vibration value to the first vibration value. The mapping relationship between this ratio and the phase angle is shown in Table 1.

[0110] Table 1

[0111] The range of a a≤1.4 1.4＜a≤2 a > 2 (exceeding the limit) Phase Adjustment 70 135 180

[0112] After adjusting the angle, if the third vibration value is greater than the third preset threshold, the method further includes: determining the second phase angle; and adjusting the test weight to the second target position according to the second phase angle, thus completing the online dynamic balancing of the rotor. The second target position is the position of the test weight after adjusting the second phase angle from the first target position. Here, the second phase angle is 180 degrees. If the third vibration value is greater than the second preset threshold but less than the third preset threshold, the test weight is adjusted by the same angle in the opposite direction of the previous adjustment angle, starting from the previous position.

[0113] For the second case, if the second vibration value is greater than the third preset threshold, the method further includes: determining the third phase angle, and adjusting the test counterweight to the third target position according to the third phase angle, thereby completing the online dynamic balancing of the rotor. The third target position is the position of the test counterweight after rotating from the initial phase angle to the third phase angle, thus completing the online dynamic balancing of the rotor.

[0114] Corresponding to the methods in the above embodiments, a specific example will be used to introduce the implementation process of online dynamic balancing of rotor.

[0115] Step 1: Initially run the rotor and record the rotor's vibration value (first vibration value), denoted as a.

[0116] Step 2: Select the balancing speed (when the initial vibration value of the rotor is greater than or equal to 1.3 times the vibration standard value, selecting the speed corresponding to the rotor vibration value reaching 1.3 times the vibration standard value as the balancing speed can greatly reduce the workload of online dynamic balancing of the machine; when the rotor vibration is less than 1.3 times the vibration standard value, the speed corresponding to the rotor vibration reaching the peak value can be selected, at which time the effective balancing angle is larger and the vibration over-limit angle is smaller) and a suitable trial counterweight.

[0117] Step 3: Apply a trial counterweight at any position and run the rotor to the equilibrium speed, and record the vibration value of the rotor at this time (the second vibration value), denoted as b.

[0118] If b has met the rotor vibration standard requirements (second preset threshold), the dynamic balancing test ends.

[0119] If the rotor vibration exceeds the limit before reaching the equilibrium speed, the position of the test counterweight needs to be rotated 180 degrees and the vibration value of the test rotor needs to be re-tested.

[0120] If b is between the vibration standard requirement and the rotor vibration exceeding the limit, proceed to step four.

[0121] Step 4: Calculate b / a and substitute it into Table 1 to find the corresponding trial weight to adjust the angle.

[0122] Step 5: After adjusting the angle of the test counterweight, run the rotor to verify its vibration state and record the vibration value of the rotor at this time, denoted as c.

[0123] If c meets the standard requirement (second preset threshold), the test ends.

[0124] If c still exceeds the second preset threshold but is less than the third preset threshold, the test counterweight needs to be adjusted to the other side, and the vibration state of the rotor needs to be verified again.

[0125] If c exceeds the limit (exceeds the third preset threshold), the test weight needs to be rotated 180 degrees.

[0126] Step 6: Run the balanced rotor to verify its vibration state.

[0127] By executing this method, the balancing speed is determined based on the pre-acquired first vibration value of the rotor and a first preset threshold. The first vibration value is the vibration value of the rotor before online dynamic balancing. After determining the first vibration value, the mass of the added trial counterweight can be better determined based on the first vibration value, thereby avoiding the problem of insufficient trial counterweight mass in the prior art. Furthermore, after determining the balancing speed, it is not necessary to modify the balancing speed again, avoiding the problem of multiple adjustments to the balancing speed in the prior art. Further, based on the first vibration value, a second preset threshold, the radius of the pre-acquired trial counterweight, the preset impact force, and the balancing speed, the mass of the trial counterweight to be added to the rotor is determined, avoiding excessive trial counterweight mass, which could cause irreversible damage to the rotor during online dynamic balancing. Finally, after determining the mass of the trial counterweight, the rotor is subjected to online dynamic balancing. During the dynamic balancing process, the second vibration value of the rotor after adding the trial counterweight is used to determine whether the online dynamic balancing of the rotor is completed, which can further ensure the effectiveness of online dynamic balancing.

[0128] The above are embodiments of the rotor online dynamic balancing method provided in this application. Other embodiments of the rotor online dynamic balancing method provided in this application are described below. Please refer to the following for details.

[0129] This invention also discloses an online dynamic balancing device for rotors, such as... Figure 4 As shown, the device includes:

[0130] The rotational speed determination module 401 is used to determine the balance rotational speed based on the first vibration value of the rotor and the first preset threshold value, wherein the first vibration value is the vibration value of the rotor when no online dynamic balancing is performed.

[0131] The mass determination module 402 is used to determine the mass of the rotor's test counterweight based on the first vibration value, the second preset threshold, the radius of the pre-acquired test counterweight, the preset impact force, and the balancing speed.

[0132] The acquisition module 403 is used to add a test counterweight of the same mass as the test counterweight to the rotor, rotate the rotor to the equilibrium speed, and acquire the second vibration value.

[0133] The verification module 404 is used to complete the online dynamic balancing of the rotor if the second vibration value is less than or equal to the second preset threshold, wherein the second preset threshold is less than the first preset threshold.

[0134] In an optional implementation, if the second vibration value in the verification module is greater than a second preset threshold and less than a third preset threshold, and the second preset threshold is less than a first preset threshold and less than a third preset threshold, the device further includes:

[0135] The recording module is used to record the initial phase angle of the rotor when the trial fitting is added;

[0136] The ratio determination module is used to determine the vibration ratio based on the first vibration value and the second vibration value;

[0137] The phase angle determination module is used to determine the first phase angle to be adjusted for the trial counterweight based on the vibration ratio and the mapping relationship between the vibration ratio and the phase angle.

[0138] The balancing module is used to adjust the position of the test counterweight to the first target position according to the first phase angle, then rotate the rotor to reach the balance speed, and record the third vibration value. The first target position is the position of the test counterweight after rotating from the initial phase angle to the first phase angle.

[0139] The verification submodule is used to complete the online dynamic balancing of the rotor if the third vibration value is equal to the second preset threshold.

[0140] In an optional implementation, if the third vibration value is greater than a third preset threshold, the device is further configured to:

[0141] Determine the second phase angle, and adjust the test counterweight to the second target position according to the second phase angle. This completes the online dynamic balancing of the rotor. The second target position is the position of the test counterweight after adjusting the second phase angle from the first target position.

[0142] In an optional implementation, if the second vibration value is greater than a third preset threshold, the device is further configured to:

[0143] Determine the third phase angle, and adjust the test counterweight to the third target position according to the third phase angle. This completes the online dynamic balancing of the rotor. The third target position is the position of the test counterweight after rotating from the initial phase angle to the third phase angle.

[0144] In an optional implementation, the test counterweight mass of the rotor is determined based on a first vibration value, a second preset threshold, the radius of the pre-acquired test counterweight, a preset impact force, and a balancing speed, specifically for:

[0145] Obtain the transfer function between the vibration value of the rotor when it is struck by a preset striking force and the preset striking force;

[0146] Based on the first vibration value, the radius of the test counterweight, and the second preset threshold, determine the fourth vibration value excited by the mass stress of the test counterweight;

[0147] The mass of the test counterweight is determined based on the fourth vibration value, the transfer function, the radius of the test counterweight, and the balancing speed.

[0148] In an optional implementation, the balancing speed is determined based on a pre-acquired first vibration value of the rotor and a first preset threshold, specifically for:

[0149] If the first vibration value is less than the first preset threshold, the method further includes: determining the rotational speed corresponding to the maximum value of the first vibration value of the rotor as the equilibrium rotational speed;

[0150] or

[0151] If the first vibration value is greater than or equal to the first preset threshold, then the rotational speed corresponding to the vibration value of the rotor at the first preset threshold is determined to be the equilibrium rotational speed.

[0152] The functions performed by each component in the rotor online dynamic balancing device provided in this embodiment have been described in detail in any of the above method embodiments, and therefore will not be repeated here.

[0153] By executing this device,

[0154] Based on the pre-acquired first vibration value of the rotor and a first preset threshold, the balancing speed is determined. The first vibration value is the vibration value of the rotor before online dynamic balancing. After determining the first vibration value, the mass of the added trial counterweight can be better determined based on the first vibration value, thereby avoiding the problem of insufficient trial counterweight mass in the prior art. Furthermore, after determining the balancing speed, it is not necessary to modify the balancing speed again, avoiding the problem of multiple adjustments to the balancing speed in the prior art. Further, based on the first vibration value, a second preset threshold, the radius of the pre-acquired trial counterweight, the preset impact force, and the balancing speed, the mass of the trial counterweight to be added to the rotor is determined, avoiding excessive trial counterweight mass, which could cause irreversible damage to the rotor during online dynamic balancing. Finally, after determining the mass of the trial counterweight, the rotor is subjected to online dynamic balancing. During the dynamic balancing process, the second vibration value of the rotor after adding the trial counterweight is used to determine whether the online dynamic balancing of the rotor is completed, which can further ensure the effectiveness of online dynamic balancing.

[0155] This invention also provides a computer device, such as... Figure 5 As shown, the computer device may include a processor 501 and a memory 502, wherein the processor 501 and the memory 502 may be connected via a bus or other means. Figure 5 Taking the example of a connection between China and Israel via a bus.

[0156] Processor 501 can be a central processing unit (CPU). Processor 501 can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or combinations of the above types of chips.

[0157] The memory 502, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as the program instructions / modules corresponding to the rotor online dynamic balancing method in this embodiment of the invention. The processor 501 executes various functional applications and data processing by running the non-transitory software programs, instructions, and modules stored in the memory 502, thereby implementing the rotor online dynamic balancing method in the above method embodiment.

[0158] Memory 502 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created by the processor 501, etc. Furthermore, memory 502 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory 502 may optionally include memory remotely located relative to processor 501, and these remote memories may be connected to processor 501 via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0159] One or more modules are stored in memory 502, and when executed by processor 501, they perform actions such as... Figure 1 The rotor online dynamic balancing method in the illustrated embodiment.

[0160] For specific details regarding the aforementioned computer equipment, please refer to the relevant documentation. Figure 1 The relevant descriptions and effects in the illustrated embodiments are for understanding purposes only and will not be repeated here.

[0161] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk drive (HDD), or solid-state drive (SSD), etc.; the storage medium can also include combinations of the above types of memory.

[0162] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for online dynamic balancing of a rotor, characterized in that, The method includes: The balance speed is determined based on the first vibration value of the rotor and the first preset threshold value, wherein the first vibration value is the vibration value of the rotor when no online dynamic balancing is performed. The mass of the test counterweight of the rotor is determined based on the first vibration value, the second preset threshold, the radius of the pre-acquired test counterweight, the preset impact force, and the balance speed. Add a test counterweight of the same mass as the test counterweight to the rotor, and rotate the rotor to the equilibrium speed to obtain the second vibration value; If the second vibration value is less than or equal to the second preset threshold, then the online dynamic balancing of the rotor is completed, and the second preset threshold is less than the first preset threshold. The mass of the test counterweight for the rotor is determined based on the first vibration value, the second preset threshold, the radius of the pre-acquired test counterweight, the preset impact force, and the balancing speed. Specifically, this includes: Obtain the transfer function between the vibration value of the rotor when it is struck by a preset striking force and the preset striking force; Based on the first vibration value and the second preset threshold, determine the fourth vibration value induced by the mass stress of the test counterweight; The mass of the test weight is determined based on the fourth vibration value, the transfer function, the radius of the test weight, and the balancing speed.

2. The method according to claim 1, characterized in that, If the second vibration value is greater than the second preset threshold and less than the third preset threshold, and the first preset threshold is less than the third preset threshold, the method further includes: Record the initial phase angle at which the trial counterweight was added to the rotor; The vibration ratio is determined based on the first vibration value and the second vibration value; Based on the vibration ratio and the mapping relationship between the vibration ratio and the phase angle, the first phase angle to be adjusted for the trial counterweight is determined. After adjusting the position of the test counterweight to the first target position according to the first phase angle, the rotor is rotated and the balance speed is reached. The third vibration value is recorded. The first target position is the position of the test counterweight after rotating from the initial phase angle to the first phase angle. If the third vibration value is less than or equal to the second preset threshold, the online dynamic balancing of the rotor is completed.

3. The method according to claim 2, characterized in that, If the third vibration value is greater than the third preset threshold, the method further includes: Determine the second phase angle, and adjust the test counterweight to the second target position according to the second phase angle to complete the online dynamic balancing of the rotor. The second target position is the position of the test counterweight after adjusting the second phase angle from the first target position.

4. The method according to claim 2, characterized in that, If the second vibration value is greater than the third preset threshold, the method further includes: Determine the third phase angle, and adjust the test counterweight to the third target position according to the third phase angle to complete the online dynamic balancing of the rotor. The third target position is the position of the test counterweight after rotating from the initial phase angle to the third phase angle.

5. The method according to claim 1, characterized in that, The step of determining the balance speed based on the pre-acquired first vibration value of the rotor and a first preset threshold specifically includes: If the first vibration value is less than the first preset threshold, the rotational speed corresponding to the maximum value of the first vibration value of the rotor is determined to be the balance rotational speed. or If the first vibration value is greater than or equal to the first preset threshold, then the rotational speed corresponding to the vibration value of the rotor at the first preset threshold is determined to be the balance rotational speed.

6. A rotor online dynamic balancing device, characterized in that, The device includes: The rotational speed determination module is used to determine the balance rotational speed based on the first vibration value of the rotor and the first preset threshold value, wherein the first vibration value is the vibration value of the rotor when it is not dynamically balanced online. The mass determination module is used to determine the mass of the test counterweight of the rotor based on the first vibration value, the second preset threshold, the radius of the pre-acquired test counterweight, the preset impact force, and the balance speed. The acquisition module is used to add a test counterweight of the same mass as the test counterweight to the rotor, rotate the rotor to the equilibrium speed, and acquire the second vibration value; The verification module is used to complete the online dynamic balancing of the rotor if the second vibration value is less than or equal to the second preset threshold, wherein the second preset threshold is less than the first preset threshold. The mass of the test counterweight for the rotor is determined based on the first vibration value, the second preset threshold, the radius of the pre-acquired test counterweight, the preset impact force, and the balancing speed. Specifically, this includes: Obtain the transfer function between the vibration value of the rotor when it is struck by a preset striking force and the preset striking force; Based on the first vibration value and the second preset threshold, determine the fourth vibration value induced by the mass stress of the test counterweight; The mass of the test weight is determined based on the fourth vibration value, the transfer function, the radius of the test weight, and the balancing speed.

7. The apparatus according to claim 6, characterized in that, If the second vibration value in the verification module is greater than a second preset threshold and less than a third preset threshold, and the second preset threshold is less than the first preset threshold and less than the third preset threshold, the device further includes: A recording module is used to record the initial phase angle of the rotor when the trial counterweight is added; The ratio determination module is used to determine the vibration ratio based on the first vibration value and the second vibration value; The phase angle determination module is used to determine the first phase angle to be adjusted for the trial counterweight based on the vibration ratio and the mapping relationship between the vibration ratio and the phase angle. The balancing module is used to adjust the position of the test counterweight to the first target position according to the first phase angle, then rotate the rotor to reach the balance speed, and record the third vibration value. The first target position is the position of the test counterweight after rotating from the initial phase angle to the first phase angle. The verification submodule is used to complete the online dynamic balancing of the rotor if the third vibration value is less than or equal to the second preset threshold.

8. A computer device, characterized in that, include: At least one processor; The processor includes a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor to cause the at least one processor to perform the rotor online dynamic balancing method as described in any one of claims 1-5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the server, it implements the rotor online dynamic balancing method as described in any one of claims 1-5.

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