CN116481716A - Online dynamic balance method and device for rotor and computer equipment - Google Patents
Online dynamic balance method and device for rotor and computer equipment Download PDFInfo
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/14—Determining imbalance
- G01M1/16—Determining imbalance by oscillating or rotating the body to be tested
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/30—Compensating imbalance
- G01M1/32—Compensating imbalance by adding material to the body to be tested, e.g. by correcting-weights
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Abstract
The invention discloses a rotor online dynamic balance method, a device and computer equipment, wherein the method comprises the steps of determining a balance rotating speed according to a first vibration value of a rotor which is obtained in advance and a first preset threshold value, wherein the first vibration value is a vibration value of the rotor when online dynamic balance is not performed; determining the trial weight mass of the rotor according to the first vibration value, the second preset threshold value, the radius of the pre-obtained trial weight, the preset knocking force and the balance rotating speed; adding test weights with the same mass as the test weights for the rotor, and rotating the rotor to a balance rotating speed to obtain a second vibration value; if the second vibration value is smaller than or equal to the second preset threshold value, online dynamic balance of the rotor is completed, and the second preset threshold value is smaller than the first preset threshold value.
Description
Technical Field
The invention relates to the technical field of rotor dynamic balance, in particular to a rotor online dynamic balance method, a rotor online dynamic balance device and computer equipment.
Background
After the rotor components are balanced, the rotor may still have an overrun vibration due to factors such as high rotational speed, high load, high temperature, etc. In this case, the problem of overrun of the rotor vibration can be solved by performing local on-line dynamic balancing on the rotor.
In the prior art, an influence coefficient method is generally adopted to carry out online dynamic balance on the rotor machine. However, when the influence coefficient method is used for carrying out local on-line dynamic balance on the rotor, professional software and equipment are usually required, so that under some limited conditions, the rotor cannot be balanced due to lack of necessary equipment.
Disclosure of Invention
Therefore, in order to solve the defects in the prior art, the embodiment of the invention provides a rotor online dynamic balance method, a rotor online dynamic balance device and computer equipment.
According to a first aspect, an embodiment of the present invention discloses a rotor online dynamic balancing method, including:
determining a balance rotating speed according to a pre-acquired first vibration value of the rotor and a first preset threshold value, wherein the first vibration value is a vibration value of the rotor when online dynamic balance is not performed;
determining the trial weight mass of the rotor according to the first vibration value, the second preset threshold value, the radius of the pre-obtained trial weight, the preset knocking force and the balance rotating speed;
adding test weights with the same mass as the test weights for the rotor, and rotating the rotor to a balance rotating speed to obtain a second vibration value;
if the second vibration value is smaller than or equal to a second preset threshold value, on-line dynamic balance of the rotor is completed, and the second preset threshold value is smaller than the first preset threshold value.
Optionally, if the second vibration value is greater than the second preset threshold and less than the third preset threshold, the first preset threshold is less than the third preset threshold, and the method further includes:
recording an initial phase angle of the added test weight on the rotor;
determining a vibration ratio according to the first vibration value and the second vibration value;
according to the mapping relation between the vibration ratio and the phase angle, determining a first phase angle to be adjusted by the test weight;
the rotor is rotated and reaches the balance rotating speed after the position of the test counterweight is adjusted to a first target position according to the first phase angle, a third vibration value is recorded, and the first target position is the position of the test counterweight after the test counterweight rotates by the first phase angle from the initial phase angle;
and if the third vibration value is smaller than or equal to a second preset threshold value, completing online dynamic balance of the rotor.
Optionally, if the third vibration value is greater than a third preset threshold, the method further includes:
and determining a second phase angle, and adjusting the test weight to a second target position according to the second phase angle, so that on-line dynamic balance of the rotor is completed, wherein the second target position is the position of the test weight after the second phase angle is adjusted from the first target position.
Optionally, if the second vibration value is greater than the third preset threshold, the method further includes:
and determining a third phase angle, and adjusting the test weight to a third target position according to the third phase angle, so that online dynamic balance of the rotor is completed, wherein the third target position is a position of the test weight after the test weight rotates by a third phase angle from the initial phase angle.
Optionally, determining the trial weight mass of the rotor according to the first vibration value, the second preset threshold, the radius of the pre-acquired trial weight, the preset knocking force and the balance rotation speed specifically includes:
acquiring a transfer function between a vibration value of the rotor when the rotor is knocked under a preset knocking force and the preset knocking force;
determining a fourth vibration value of the test weight mass stress according to the first vibration value and a second preset threshold value;
and determining the weight trial mass according to the fourth vibration value, the transfer function, the radius of the weight trial and the balance rotating speed.
Optionally, determining the balance rotation speed according to the pre-acquired first vibration value of the rotor and the first preset threshold value specifically includes:
if the first vibration value is smaller than a first preset threshold value, determining that the corresponding rotating speed is the balance rotating speed when the first vibration value of the rotor is the maximum value;
or (b)
If the first vibration value is greater than or equal to a first preset threshold value, determining that the rotation speed corresponding to the vibration value of the rotor when the first preset threshold value is the balance rotation speed.
According to a second aspect, the embodiment of the invention also discloses an online dynamic balancing device for a rotor, which comprises:
the rotating speed determining module is used for determining a balance rotating speed according to a pre-acquired first vibration value of the rotor and a first preset threshold value, wherein the first vibration value is a vibration value of the rotor when online dynamic balance is not performed;
the mass determining module is used for determining the trial weight mass of the rotor according to the first vibration value, the second preset threshold value, the radius of the pre-acquired trial weight, the preset knocking force and the balance rotating speed;
the acquisition module is used for adding test weights with the same mass as the test weights for the rotor, rotating the rotor to a balance rotating speed and acquiring a second vibration value;
and the verification module is used for completing the on-line dynamic balance of the rotor if the second vibration value is smaller than or equal to a second preset threshold value, wherein the second preset threshold value is smaller than the first preset threshold value.
Optionally, if the second vibration value in the verification module is greater than the second preset threshold and less than the third preset threshold, the second preset threshold is less than the first preset threshold and less than the third preset threshold, the apparatus further includes:
a recording module for recording an initial phase angle of the rotor to which the test weight is added;
the ratio determining module is used for determining a vibration ratio according to the first vibration value and the second vibration value;
the phase angle determining module is used for determining a first phase angle to be adjusted of the test weight according to the mapping relation between the vibration ratio and the phase angle;
the balancing module is used for adjusting the position of the test counterweight to a first target position according to the first phase angle, rotating the rotor and achieving the balancing rotation speed, and recording a third vibration value, wherein the first target position is the position of the test counterweight after rotating the first phase angle from the initial phase angle;
and the verification sub-module is used for completing the online dynamic balance of the rotor if the third vibration value is smaller than or equal to a second preset threshold value.
According to a third aspect, an embodiment of the present invention further discloses a computer device, including: at least one processor; and a memory communicatively coupled 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 steps of the rotor online dynamic balancing method as in the first aspect or any of the alternative embodiments of the first aspect.
According to a fourth aspect, an embodiment of the present invention also discloses a computer readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of the rotor online dynamic balancing method as in the first aspect or any of the alternative embodiments of the first aspect.
The technical scheme of the invention has the following advantages:
the invention provides a rotor online dynamic balance method, a device and computer equipment, which comprises the following steps: according to the pre-obtained first vibration value of the rotor and a first preset threshold value, the balance rotating speed is determined, wherein the first vibration value is the vibration value of the rotor before linear dynamic balance is carried out, and after the first vibration value is determined, the mass of the added test counterweight can be determined according to the first vibration value better later, so that the problem of low corrected test counterweight mass in the prior art can be avoided, the balance rotating speed does not need to be modified again after the balance rotating speed is determined, and the problem of multiple adjustment of the balance rotating speed in the prior art is avoided; further, according to the first vibration value, the second preset threshold value, the radius of the pre-acquired test counter weight, the preset knocking force and the balance rotating speed, the mass of the test counter weight which needs to be added to the rotor is determined, and the excessive mass of the test counter weight is avoided, so that irreversible damage is caused to the rotor during online dynamic balance; and finally, after the size of the weight is determined, carrying out online dynamic balance on the rotor, and determining whether the online dynamic balance on the rotor is finished or not according to a second vibration value of the rotor after the weight is added in the dynamic balance process, so that the effect of the online dynamic balance can be further ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart of a specific example of a rotor online dynamic balancing method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing a specific example of a rotor online dynamic balancing method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram showing a specific example of a rotor online dynamic balancing method according to an embodiment of the present invention;
FIG. 4 is a schematic block diagram of a specific example of a rotor online dynamic balancing device in an embodiment of the present invention;
fig. 5 is a diagram showing a specific example of a computer device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, or can be communicated inside the two components, or can be connected wirelessly or in a wired way. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
On-line dynamic balance of rotor:
step one: and (5) initially operating the rotor to obtain a Bode diagram of the rotor.
Step two: the balance rotational speed is selected according to the response curve in the Bode plot of the rotor.
Step three: a test weight was applied to the rotor balance section, the rotor was run to a balance rotational speed, and the Bode diagram of the rotor in this state was measured. If the rotor cannot run to the balance rotating speed after the test weight is added, the test weight position is required to be adjusted, or the step two is repeated, and the balance rotating speed is reselected.
Step four: and (3) running a calculation program of the vibration analyzer to calculate the magnitude and the phase of the correction mass.
Step five: and adjusting the size and the phase of the counterweight according to the calculation result, operating the rotor, and detecting the balance result of the rotor. If the vibration of the rotor does not reach the standard after the correction mass is applied, dynamic balance is needed to be carried out on the rotor again from the first step.
The implementation process in the prior art mainly has the following problems:
(1) The local on-line dynamic balance of the rotor requires the use of a specialized vibration data analyzer. If an emergency situation or a test site is not provided with a vibration data analyzer, dynamic balance work on the rotor is difficult to carry out.
(2) Professional vibration data analyzers are expensive and very expensive to use.
(3) When the rotor is balanced using a vibration data analyzer, either too much or too little trial weight is applied to affect the calculation of the correction quality. If the test result is not ideal, the balancing operation is needed to be carried out again according to the balancing step.
(4) The accuracy of the weight calculation result of the correction mass is not high, the test result cannot reach the expected calculation, and the weight of the correction mass can only be adjusted gradually, so that the rotor vibration reaches the engineering requirement.
Aiming at the technical problems mentioned in the background art, the embodiment of the application provides an online dynamic balancing method for a rotor, and particularly referring to fig. 1, the method comprises the following steps:
and step 101, determining the balance rotating speed according to the pre-acquired first vibration value of the rotor and a first preset threshold value.
Wherein the first vibration value is a vibration value of the rotor when the on-line dynamic balance is not performed.
For example, the first vibration value, i.e. the final rotor, requires balanced vibrations after the linear balancing is completed. The first vibration value may be obtained by means of prior art, and will not be described here.
The first preset threshold is 1.3 times of a rotor vibration standard value in the embodiment of the application, wherein the vibration standard value is G2.5 grade of the dynamic balance grade of a new machine rotor according to the standard ISO 1940; the "new machine" run-time vibration assessment standard value was 2.8mm/s according to standard VDI 2056. The size of the first preset threshold is not limited, and can be determined by a person skilled in the art according to practical situations.
According to the magnitude relation between the first vibration value and the first preset threshold value, the rotation speed corresponding to the vibration value is determined to be the balance rotation speed, and the person skilled in the art can determine according to actual conditions.
In a preferred embodiment, the determining the balancing rotational speed according to the pre-acquired first vibration value of the rotor and the first preset threshold value specifically includes:
if the first vibration value is smaller than a first preset threshold value, determining that the corresponding rotating speed is the balance rotating speed when the first vibration value of the rotor is the maximum value;
or (b)
If the first vibration value is greater than or equal to a first preset threshold value, determining that the rotation speed corresponding to the vibration value of the rotor when the first preset threshold value is the balance rotation speed.
The process of determining the balance rotating speed includes two cases, wherein one is that a first vibration value generated by the rotor in the normal running process is smaller than a first preset threshold value, and the rotating speed corresponding to the maximum first vibration value is selected as the balance rotating speed; in the second case, when the first vibration value is greater than or equal to a first preset threshold value, the corresponding balance rotating speed is selected, and the rotating speed corresponding to the vibration of the rotor when the first preset threshold value is used as the balance rotating speed.
Step 102, determining the trial weight mass of the rotor according to the first vibration vector, the second preset threshold, the radius of the pre-obtained trial weight, the preset knocking force and the balance rotating speed.
Illustratively, the criteria for determining the quality of the trial weights are: the resultant force composed of the vibration value of the pilot weight excitation (vibration vector of the pilot weight excitation) and the first vibration value (vibration vector of the rotor imbalance excitation) is not more than the vibration standard, see the resultant force OC in fig. 2 for details. This effectively reduces the first vibration value to within the standard vibration.
In a preferred embodiment, determining the trial weight mass of the rotor based on the first vibration value, the second preset threshold, the radius of the pre-obtained trial weight, the preset tapping force magnitude, and the balancing rotational speed specifically includes:
acquiring a transfer function between a vibration value of the rotor when the rotor is knocked under a preset knocking force and the preset knocking force;
determining a fourth vibration value of the test weight mass stress according to the first vibration value and a second preset threshold value;
and determining the weight trial mass according to the fourth vibration value, the transfer function, the radius of the weight trial and the balance rotating speed.
Illustratively, a transfer function between a vibration value at a predetermined tapping force when the rotor is tapped and the predetermined tapping force:
a=f (F) or f=f -1 (A)＝g(A) (1)
Wherein A is a vibration value generated by knocking the rotor by knocking force; f is the equilibrium plane excitation force, wherein A is obtained according to a knocking experiment test.
The relationship between the equilibrium surface excitation force F and the trial weight mass is:
wherein r is the radius of the test weight;the rotational speed of the rotor, i.e. the balancing rotational speed; m is the mass of the test weight.
The formula (2) is to be taken into the formula (1):
obtainable from (3)
When the size of a selects OB, the corresponding effective balance angle is the largest, and the calculating mode of OB may be calculated according to the stress analysis in fig. 2.
Preferably, the method of determining a (OB) is as follows:
as shown in fig. 2, let ∈o be the vibration standard circle, OA be the first vibration value excited by the initial unbalance of the rotor, OB be the vibration value excited by the test weight (assuming that the stress analysis is performed during the process), and OC be the rotor vibration value (resultant force) after the weight of Shi Jiashi. When OC is within or on the order of O, the balance of the rotor satisfies the requirement.
As can be seen from fig. 2, when AC is tangential to the +.o, the effective balancing angle is maximum (when the rotor vibration is less than 1.3 times the vibration standard value, the balancing effective angle will be larger, the vibration overrun angle will be smaller, but the included angle between the balancing effective angle and the vibration overrun angle will be gradually increased and then gradually decreased, with the maximum value being 127). As long as the pilot weight is applied in this angular range, the rotor vibration can reach the standard. Thus, it is possible to obtain: OB (object) support 2 ＝AC 2 ＝OA 2 -OC 2 。
That is to say:the mass of the test counterweight can thus be determined.
And step 103, adding a test weight with the same size as the test weight for the rotor, and rotating the rotor to a balance rotating speed to obtain a second vibration value.
Step 104, if the second vibration value is smaller than or equal to a second preset threshold value, the online dynamic balance of the rotor is completed, and the second preset threshold value is smaller than the first preset threshold value.
For example, after determining the mass of the test weights of the rotor, the test weights of the respective masses are added to the rotor, and after turning the rotor to the balancing rotational speed, a second vibration value of the rotor is obtained.
If the second vibration value is smaller than or equal to the second preset threshold value at this time, the position of the test counterweight is correct, and the rotor achieves dynamic balance, wherein the second preset threshold value is a value corresponding to the vibration standard of the rotor in the running process, and the corresponding second preset threshold value in the embodiment of the application is 2.8mm/s.
After the dynamic balance is achieved, related operation can be continued, and when unbalance occurs again in the operation process, the online dynamic balance can be carried out by adopting the method.
On the basis of the foregoing embodiment, the embodiment of the present invention further provides another online dynamic balancing method for a rotor, which will not be repeated in the present embodiment for what has been described in the foregoing embodiment, where in this embodiment, it is considered that if the second vibration value is greater than the second preset threshold and less than the third preset threshold, where the first preset threshold is less than the third preset threshold, the method further includes:
recording an initial phase angle of the added test weight on the rotor;
determining a vibration ratio according to the first vibration value and the second vibration value;
according to the mapping relation between the vibration ratio and the phase angle, determining a first phase angle to be adjusted by the test weight;
the rotor is rotated and reaches the balance rotating speed after the position of the test counterweight is adjusted to a first target position according to the first phase angle, a third vibration value is recorded, and the first target position is the position of the test counterweight after the test counterweight rotates by the first phase angle from the initial phase angle;
and if the third vibration value is smaller than or equal to a second preset threshold value, completing online dynamic balance of the rotor.
For example, when the second vibration value is greater than the second preset threshold, the second vibration value is correspondingly divided into two cases, wherein one is that the second vibration value is greater than the second preset threshold and less than the third preset threshold; in the second case, the second vibration value is greater than a third preset threshold. Wherein the third preset threshold value indicates that the rotor will fail or fail to operate when the vibration value of the rotor exceeds this value. In the embodiment of the present application, the vibration standard of 2 times corresponding to the third preset threshold, that is, 2×2.8mm/s, and of course, for the numerical 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, 2 times the vibration standard), those skilled in the art may set according to practical situations.
As shown in fig. 3, for the second preset threshold, the vibration standard circle corresponds to the vibration standard circle, and for the third preset threshold, the vibration limit circle corresponds to the vibration limit circle, and in fig. 3, the circle between the three concentric circles is a schematic diagram that the vibration value of the rotor is between the second preset threshold and the third preset threshold (or may be said to be a schematic diagram that the rotor is at the first preset threshold). The circle on the left is a corresponding stress analysis graph, and at the moment, the effective balance angle is 101 degrees, and the overrun vibration angle is 83 degrees; if the rotor vibration exceeds the limit after Shi Jiashi is weighted (the judgment of the exceeding limit can be directly carried out through the vibration value), the test weight can enter the effective angle range of balance only by rotating the test weight by 180 degrees, and the balance operation is completed.
For the first case, if the second vibration value is greater than the second preset threshold and less than the third preset threshold, determining a phase angle corresponding to the trial weight according to a ratio (a) of the second vibration value to the first vibration value, wherein a mapping relationship between the ratio and the phase angle is shown in table 1.
TABLE 1
| a range of a | a≤1.4 | 1.4＜a≤2 | a > 2 (overrun) |
| Phase adjustment | 70 | 135 | 180 |
After adjusting the angle, if the third vibration value is greater than a third preset threshold, the method further includes: and determining a second phase angle, and adjusting the test weight to a second target position according to the second phase angle, so that on-line dynamic balance of the rotor is completed, wherein the second target position is the position of the test weight after the second phase angle is adjusted from the first target position. The second phase angle here is 180 degrees. If the third vibration value is larger than the second preset threshold value and smaller than the third preset threshold value, the trial weight is adjusted by the same angle in the opposite direction of the previous angle adjustment from the previous position.
For the second case, if the second vibration value is greater than the third preset threshold value, the method further includes: and determining a third phase angle, and adjusting the test weight to a third target position according to the third phase angle, so as to complete the online dynamic balance of the rotor, wherein the third target position is the position of the test weight after rotating by the third phase angle from the initial phase angle, and the online dynamic balance of the rotor is completed.
In correspondence with the method of the above embodiment, a specific example will be described for the implementation of the rotor on-line dynamic balance.
Step one: the rotor is initially operated and the vibration value (first vibration value) of the rotor is recorded and denoted as a.
Step two: and selecting a balance rotating speed according to the magnitude of a (when the initial vibration value of the rotor is greater than or equal to 1.3 times of the vibration standard value, the rotating speed corresponding to the rotor vibration value reaching 1.3 times of the vibration standard value is selected as the balance rotating speed, so that the workload of local online dynamic balance can be greatly reduced, and when the rotor vibration is less than 1.3 times of the vibration standard value, the rotating speed corresponding to the rotor vibration reaching the peak value can be selected, and at the moment, the effective balance angle is larger, and the overrun vibration angle is smaller), and a proper test counterweight.
Step three: a test weight is applied at an arbitrary position, and the rotor is operated to a balance rotation speed, and a vibration value (second vibration value) of the rotor at this time is recorded, denoted as b.
And if b meets the rotor vibration standard requirement (second preset threshold), ending the dynamic balance test.
If the rotor vibration exceeds the limit (i.e., exceeds the limit) before the equilibrium rotational speed is reached, the test weight is rotated 180 degrees and the vibration value of the rotor is retested.
And if b is between the vibration standard requirement and the rotor vibration overrun, executing the fourth step.
Step four: b/a is calculated and is carried into table 1, and the corresponding adjustment angle of the test weight is searched.
Step five: and after the weight trial angle is adjusted, the rotor is operated, the vibration state of the rotor is verified, and the vibration value of the rotor at the moment is recorded and is marked as c.
If c meets the standard requirement (the second preset threshold), the test is ended.
If c still exceeds the second preset threshold value and is smaller than the third preset threshold value, the test weight is required to be adjusted to the other side, and the vibration state of the rotor is verified again.
If c exceeds the third preset threshold, the trial weight needs to be rotated 180 degrees.
Step six: and (3) operating the balanced rotor, and verifying the vibration state of the rotor.
By executing the method, the balance rotating speed is determined according to the pre-acquired first vibration value of the rotor and the first preset threshold value, wherein the first vibration value is the vibration value of the rotor before online dynamic balance is performed, and after the first vibration value is determined, the mass of the added test counterweight can be determined according to the first vibration value better later, so that the problem of low corrected test counterweight mass in the prior art can be avoided, the balance rotating speed is not required to be modified again after the balance rotating speed is determined, and the problem of multiple adjustment of the balance rotating speed in the prior art is avoided; further, according to the first vibration value, the second preset threshold value, the radius of the pre-acquired test counter weight, the preset knocking force and the balance rotating speed, the mass of the test counter weight which needs to be added to the rotor is determined, and the excessive mass of the test counter weight is avoided, so that irreversible damage is caused to the rotor during online dynamic balance; and finally, after the size of the weight is determined, carrying out online dynamic balance on the rotor, and determining whether the online dynamic balance on the rotor is finished or not according to a second vibration value of the rotor after the weight is added in the dynamic balance process, so that the effect of the online dynamic balance can be further ensured.
In the above, for the embodiments of the rotor online dynamic balancing method provided in the present application, other embodiments of the rotor online dynamic balancing provided in the present application are described below, and specific reference is made to the following.
The embodiment of the invention also discloses a rotor online dynamic balancing device, as shown in fig. 4, which comprises:
the rotation speed determining module 401 is configured to determine a balance rotation speed according to a pre-acquired first vibration value of the rotor and a first preset threshold, where the first vibration value is a vibration value of the rotor when online dynamic balance is not performed;
the mass determining module 402 is configured to determine a trial weight mass of the rotor according to the first vibration value, the second preset threshold, the radius of the pre-obtained trial weight, the preset tapping force, and the balance rotation speed;
the obtaining module 403 is configured to add a test weight with the same mass size as the test weight to the rotor, and rotate the rotor to a balance rotation speed to obtain a second vibration value;
and the verification module 404 is configured to complete online dynamic balancing of the rotor if the second vibration value is less than or equal to a second preset threshold, where the second preset threshold is less than the first preset threshold.
In an alternative embodiment, if the second vibration value in the verification module is greater than the second preset threshold and less than the third preset threshold, the second preset threshold is less than the first preset threshold and less than the third preset threshold, the apparatus further includes:
the recording module is used for recording an initial phase angle of the rotor added trial fit;
the ratio determining module is used for determining a vibration ratio according to the first vibration value and the second vibration value;
the phase angle determining module is used for determining a first phase angle to be adjusted of the test weight according to the mapping relation between the vibration ratio and the phase angle;
the balancing module is used for adjusting the position of the test counterweight to a first target position according to the first phase angle, rotating the rotor and achieving the balancing rotation speed, and recording a third vibration value, wherein the first target position is the position of the test counterweight after rotating the first phase angle from the initial phase angle;
and the verification sub-module is used for completing the online dynamic balance of the rotor if the third vibration value is equal to the second preset threshold value.
In an alternative embodiment, if the third vibration value is greater than a third preset threshold, the apparatus is further configured to:
and determining a second phase angle, and adjusting the test weight to a second target position according to the second phase angle, so that on-line dynamic balance of the rotor is completed, wherein the second target position is the position of the test weight after the second phase angle is adjusted from the first target position.
In an alternative embodiment, if the second vibration value is greater than the third preset threshold value, the apparatus is further configured to:
and determining a third phase angle, and adjusting the test weight to a third target position according to the third phase angle, so as to complete the online dynamic balance of the rotor, wherein the third target position is the position of the test weight after rotating by the third phase angle from the initial phase angle, and the online dynamic balance of the rotor is completed.
In an alternative embodiment, the trial weight mass of the rotor is determined according to the first vibration value, the second preset threshold value, the radius of the pre-acquired trial weight, the preset striking force and the balance rotation speed, and is specifically used for:
acquiring a transfer function between a vibration value of the rotor when the rotor is knocked under a preset knocking force and the preset knocking force;
determining a fourth vibration value of the test counterweight mass stress according to the first vibration value, the radius of the test counterweight and the second preset threshold;
and determining the weight trial mass according to the fourth vibration value, the transfer function, the radius of the weight trial and the balance rotating speed.
In an alternative embodiment, the balancing rotational speed is determined from the pre-acquired first vibration value of the rotor and a first preset threshold value, in particular for:
if the first vibration value is smaller than the first preset threshold value, the method further comprises: determining the corresponding rotating speed as the balance rotating speed when the first vibration value of the rotor is the maximum value;
or (b)
If the first vibration value is greater than or equal to a first preset threshold value, determining that the rotation speed corresponding to the vibration value of the rotor when the first preset threshold value is the balance rotation speed.
The functions performed by each component in the rotor online dynamic balancing device provided in the embodiment of the present invention are described in detail in any of the above method embodiments, so that no further description is given here.
By performing this means of the device in question,
according to the pre-obtained first vibration value of the rotor and a first preset threshold value, the balance rotating speed is determined, wherein the first vibration value is the vibration value of the rotor before linear dynamic balance is carried out, and after the first vibration value is determined, the mass of the added test counterweight can be determined according to the first vibration value better later, so that the problem of low corrected test counterweight mass in the prior art can be avoided, the balance rotating speed does not need to be modified again after the balance rotating speed is determined, and the problem of multiple adjustment of the balance rotating speed in the prior art is avoided; further, according to the first vibration value, the second preset threshold value, the radius of the pre-acquired test counter weight, the preset knocking force and the balance rotating speed, the mass of the test counter weight which needs to be added to the rotor is determined, and the excessive mass of the test counter weight is avoided, so that irreversible damage is caused to the rotor during online dynamic balance; and finally, after the size of the weight is determined, carrying out online dynamic balance on the rotor, and determining whether the online dynamic balance on the rotor is finished or not according to a second vibration value of the rotor after the weight is added in the dynamic balance process, so that the effect of the online dynamic balance can be further ensured.
Embodiments of the present invention also provide a computer device, as shown in fig. 5, which may include a processor 501 and a memory 502, where the processor 501 and the memory 502 may be connected by a bus or otherwise, and in fig. 5, the connection is exemplified by a bus.
The processor 501 may be a central processing unit (Central Processing Unit, CPU). The processor 501 may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or a combination thereof.
The memory 502, as a non-transitory computer readable storage medium, may be used to store non-transitory software programs, non-transitory computer executable programs, and modules, such as program instructions/modules corresponding to the rotor online dynamic balancing method in the embodiments of the present invention. The processor 501 executes various functional applications of the processor and data processing by running non-transitory software programs, instructions, and modules stored in the memory 502, i.e., to implement the rotor online dynamic balancing method in the above-described method embodiments.
Memory 502 may include a storage program area that may store an operating system, at least one application program required for functionality, and a storage data area; the storage data area may store data created by the processor 501, etc. In addition, memory 502 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 502 may optionally include memory located remotely from processor 501, which may be connected to processor 501 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
One or more modules are stored in memory 502 that, when executed by processor 501, perform the rotor online dynamic balancing method of the embodiment shown in fig. 1.
The details of the above computer device may be understood correspondingly with respect to the corresponding relevant descriptions and effects in the embodiment shown in fig. 1, which are not repeated here.
It will be appreciated by those skilled in the art that implementing all or part of the above-described embodiment method may be implemented by a computer program to instruct related hardware, and the program may be stored in a computer readable storage medium, and the program may include the above-described embodiment method when executed. The storage medium may be a magnetic Disk, an optical disc, a Read-Only Memory (ROM), a random access Memory (RandomAccessMemory, RAM), a Flash Memory (Flash Memory), a Hard Disk (HDD), or a Solid State Drive (SSD); the storage medium may also comprise a combination of memories of the kind described above.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations are within the scope of the invention as defined by the appended claims.
Claims (10)
1. A method for online dynamic balancing of a rotor, the method comprising:
determining a balance rotating speed according to a first pre-acquired vibration value of a rotor and a first preset threshold value, wherein the first vibration value is a vibration value of the rotor when online dynamic balance is not performed;
determining the trial weight mass of the rotor according to the first vibration value, the second preset threshold value, the radius of the pre-obtained trial weight, the preset knocking force and the balance rotating speed;
adding test weights with the same mass as the test weights for the rotor, and rotating the rotor to a balance rotating speed to obtain a second vibration value;
if the second vibration value is smaller than or equal to the second preset threshold value, online dynamic balance of the rotor is completed, and the second preset threshold value is smaller than the first preset threshold value.
2. The method of claim 1, wherein if the second vibration value is greater than the second preset threshold and less than a third preset threshold, the first preset threshold is less than the third preset threshold, the method further comprising:
recording an initial phase angle of the rotor to which the trial weights are added;
determining a vibration ratio according to the first vibration value and the second vibration value;
according to the mapping relation between the vibration ratio and the phase angle, determining a first phase angle to be adjusted by the test weight;
the rotor is rotated to reach the balance rotating speed after the position of the test counterweight is adjusted to a first target position according to the first phase angle, a third vibration value is recorded, and the first target position is the position of the test counterweight after the test counterweight rotates by the first phase angle from the initial phase angle;
and if the third vibration value is smaller than or equal to a second preset threshold value, completing online dynamic balance of the rotor.
3. The method of claim 2, wherein if the third vibration value is greater than the third preset threshold value, the method further comprises:
and determining a second phase angle, and adjusting the test weight to a second target position according to the second phase angle, so as to complete online dynamic balance of the rotor, wherein the second target position is a position of the test weight after the second phase angle is adjusted from the first target position.
4. The method of claim 2, wherein if the second vibration value is greater than the third preset threshold value, the method further comprises:
and determining a third phase angle, and adjusting the test weight to a third target position according to the third phase angle, so as to complete online dynamic balance of the rotor, wherein the third target position is a position of the test weight after rotating the third phase angle from the initial phase angle.
5. The method according to any one of claims 1-4, wherein determining the trial weight mass of the rotor based on the first vibration value, the second preset threshold value, the pre-obtained radius of the trial weight, the pre-set tapping force magnitude, and the balancing rotational speed, comprises:
acquiring a transfer function between a vibration value of the rotor when the rotor is knocked under a preset knocking force and the preset knocking force;
determining a fourth vibration value of the test weight mass stress according to the first vibration value and the second preset threshold;
and determining the weight trial mass according to the fourth vibration value, the transfer function, the radius of the weight trial and the balance rotating speed.
6. The method according to any one of claims 1-4, wherein determining the balancing rotational speed based on the pre-acquired first vibration value of the rotor and the first preset threshold value, comprises:
if the first vibration value is smaller than a first preset threshold value, determining that the corresponding rotating speed is the balance rotating speed when the first vibration value of the rotor is the maximum value;
or (b)
And if the first vibration value is larger than or equal to the first preset threshold value, determining that the rotating speed corresponding to the vibration value of the rotor when the first preset threshold value is the balance rotating speed.
7. An on-line dynamic balancing apparatus for a rotor, the apparatus comprising:
the rotating speed determining module is used for determining a balance rotating speed according to a pre-acquired first vibration value of the rotor and a first preset threshold value, wherein the first vibration value is a vibration value of the rotor when online dynamic balance is not performed;
the mass determining module is used for determining the trial weight mass of the rotor according to the first vibration value, the second preset threshold value, the radius of the pre-acquired trial weight, the preset knocking force and the balance rotating speed;
the acquisition module is used for adding a test counterweight with the same mass as the test counterweight in size for the rotor, and rotating the rotor to a balance rotating speed to acquire a second vibration value;
and the verification module is used for completing the online dynamic balance of the rotor if the second vibration value is smaller than or equal to the second preset threshold value, wherein the second preset threshold value is smaller than the first preset threshold value.
8. The apparatus of claim 7, wherein if the second vibration value in the verification module is greater than a second preset threshold and less than a third preset threshold, the second preset threshold is less than the first preset threshold and less than the third preset threshold, the apparatus further comprising:
the recording module is used for recording the initial phase angle of the rotor to which the trial weight is added;
the ratio determining module is used for determining a vibration ratio according to the first vibration value and the second vibration value;
the phase angle determining module is used for determining a first phase angle to be adjusted of the test weight according to the mapping relation between the vibration ratio and the phase angle;
the balancing module is used for rotating the rotor to reach the balancing rotating speed after adjusting the position of the test counterweight to a first target position according to the first phase angle, and recording a third vibration value, wherein the first target position is the position of the test counterweight after rotating the first phase angle from the initial phase angle;
and the verification sub-module is used for completing the online dynamic balance of the rotor if the third vibration value is smaller than or equal to a second preset threshold value.
9. A computer device, comprising: at least one processor; and a memory communicatively coupled 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 of any one of claims 1-6.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a server, implements the rotor online dynamic balancing method according to any one of claims 1-6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310231111.2A CN116481716A (en) | 2023-03-10 | 2023-03-10 | Online dynamic balance method and device for rotor and computer equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310231111.2A CN116481716A (en) | 2023-03-10 | 2023-03-10 | Online dynamic balance method and device for rotor and computer equipment |
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| Publication Number | Publication Date |
|---|---|
| CN116481716A true CN116481716A (en) | 2023-07-25 |
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|---|---|---|---|
| CN202310231111.2A Pending CN116481716A (en) | 2023-03-10 | 2023-03-10 | Online dynamic balance method and device for rotor and computer equipment |
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| Country | Link |
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| CN (1) | CN116481716A (en) |
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- 2023-03-10 CN CN202310231111.2A patent/CN116481716A/en active Pending
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