CN-122003587-A - Method for obtaining balance correction information and balance correction information obtaining device

CN122003587ACN 122003587 ACN122003587 ACN 122003587ACN-122003587-A

Abstract

The method for obtaining balance correction information includes a step of obtaining first vibration data when a rotating body is rotated at a specific rotational speed without trial cutting, a step of obtaining second vibration data when the rotating body is rotated at a low frequency rotational speed lower than the specific rotational speed without trial cutting, a step of obtaining third vibration data when the rotating body is rotated at the specific rotational speed after trial cutting is performed at a first correction position, a step of obtaining first influence coefficient indicating the degree of influence of trial cutting on the vibration of the rotating body by using the first vibration data and the third vibration data, a step of obtaining radial runout information indicating the degree of runout caused by the shape of the rotating body by using the second vibration data, and a step of obtaining balance correction information by using the first vibration data, the influence coefficient, and the radial runout information.

Inventors

ISHIMOTO KOUSHI
Gao Yingfengshu

Assignees

株式会社IHI

Dates

Publication Date: 20260508
Application Date: 20240516
Priority Date: 20230928

Claims (6)

1. A method for obtaining balance correction information for correcting dynamic unbalance of a rotating body rotatably supported by a non-contact bearing and rotated about a rotation axis, the method comprising the steps of: A step of obtaining first vibration data along a direction intersecting the rotation axis when the rotating body rotates at a specific rotation speed without applying a test weight to the rotating body or without applying a test cutting to the rotating body; Obtaining second vibration data along a direction intersecting the rotation axis when the rotating body rotates at a low-frequency rotation speed lower than the specific rotation speed without applying a test weight to the rotating body or without applying the test cutting to the rotating body; A step of obtaining third vibration data along a direction intersecting the rotation axis when the test weight is applied to the first correction position in the rotating body or the test cutting is performed and the rotating body is rotated at the specific rotation speed; A step of obtaining a first influence coefficient indicating a degree of influence of the trial weight or the trial cutting on the vibration of the rotating body, using the first vibration data and the third vibration data; A step of obtaining radial runout information indicating the degree of runout caused by the shape of the rotating body using the second vibration data, and And obtaining the balance correction information by using the first vibration data, the influence coefficient, and the radial runout information.
2. The method for obtaining balance correction information according to claim 1, wherein, The step of obtaining the first vibration data includes applying a predetermined driving force to the rotating body to form a forced rotation state in which the rotating body rotates at the specific rotation speed, obtaining the first vibration data, The step of obtaining the second vibration data is performed after the step of obtaining the first vibration data, and the application of the predetermined driving force applied in the step of obtaining the first vibration data is stopped, so that the rotation speed of the rotating body is gradually reduced to a free rotation state, and the second vibration data is obtained.
3. The method for obtaining balance correction information according to claim 1 or 2, characterized by further comprising the steps of: a step of obtaining fourth vibration data in a direction intersecting the rotation axis when the rotation body is rotated at the specific rotation speed in a state where the test weight is applied or the test cutting is performed to a second correction position different from the first correction position in the rotation body, and And obtaining a second influence coefficient indicating an extent of influence of the application of the test weight or the test cutting on the vibration of the rotating body, using the third vibration data and the fourth vibration data.
4. The method for obtaining balance correction information according to claim 1, wherein, The specific rotation speed is higher than the floating rotation speed of the rotating body floating from the bearing, The low frequency rotation speed is lower than the floating rotation speed.
5. The method for obtaining balance correction information according to claim 1, wherein, The specific rotational speed is higher than a dangerous rotational speed of the rotating body, The low frequency rotational speed is lower than the primary dangerous rotational speed of the rotating body.
6. A balance correction information acquisition device for acquiring balance correction information for correcting a dynamic unbalance of a rotating body rotatably supported by a non-contact bearing and rotated about a rotation axis, the device comprising: A vibration data acquisition unit that receives first vibration data along a direction intersecting the rotation axis when the rotation body is rotated at a specific rotation speed without applying a test weight to the rotation body and without performing a test cutting to the rotation body, second vibration data along a direction intersecting the rotation axis when the rotation body is rotated at a low frequency rotation speed lower than the specific rotation speed without applying a test weight to the rotation body and without performing the test cutting to the rotation body, and third vibration data along a direction intersecting the rotation axis when the test weight is applied to a first correction position in the rotation body or the test cutting is performed to the rotation body; An influence coefficient obtaining unit that obtains a first influence coefficient indicating a degree of influence of the application of the trial weight or the execution of the trial cutting on the vibration of the rotating body, using the first vibration data and the third vibration data; A radial runout information acquisition unit for acquiring radial runout information indicating the degree of runout caused by the shape of the rotor, using the second vibration data, and And a balance correction information acquisition unit that acquires the balance correction information using the first vibration data, the influence coefficient, and the radial runout information.

Description

Method for obtaining balance correction information and balance correction information obtaining device Technical Field The present disclosure relates to a method of obtaining balance correction information and a balance correction information acquisition apparatus. Background Vibration data is obtained if vibration of a rotating body rotating at a high speed is measured using a vibrator. The non-uniformity of the mass distribution present around the rotation axis of the rotating body is the cause of dynamic unbalance. The vibration data contains a vibration component caused by dynamic unbalance. In addition, the vibration data sometimes contains a vibration component of a factor different from that caused by dynamic unbalance. For example, as a vibration component which is different from a vibration component caused by dynamic unbalance, a component which appears to vibrate as an apparent rotating body due to the shape of the outer shape of the rotating body may be mentioned. Such a phenomenon is called radial runout (runout). For example, patent document 1 discloses a rotary equipment test apparatus. The test device of patent document 1 obtains the amount of shape deviation when the rotating body is stationary as the radial runout amount. The shape deviation amount at the rotational speed during operation is obtained from the radial runout amount. The shape deviation amount in operation is subtracted from the vibration synchronized with the rotation generated in operation, whereby a highly accurate vibration characteristic can be obtained. Patent document 1 Japanese patent laid-open No. 7-270229 In order to correct the dynamic balance of the rotating body, it is necessary to accurately know the vibration component caused by the dynamic unbalance. As also shown in patent document 1, vibration data obtained using a vibrator sometimes contains apparent vibration components caused by radial runout. As described above, the apparent vibration component caused by radial runout is not a dynamic unbalance-caused vibration component. Therefore, it is necessary to subtract the apparent vibration component caused by radial runout from the vibration data obtained using the vibrator. A method of subtracting the apparent vibration component caused by radial runout is represented by patent document 1, and several methods have been proposed. However, in this technical field, a technique is desired that can easily obtain highly accurate balance correction information based on vibration data obtained by subtracting an apparent vibration component caused by radial runout. Disclosure of Invention The present disclosure provides a method of obtaining balance correction information and a balance correction information obtaining apparatus that can simply obtain balance correction information with high accuracy. A method of obtaining balance correction information according to one embodiment of the present disclosure is a method of obtaining balance correction information for correcting dynamic unbalance of a rotating body rotatably supported by a non-contact bearing and rotated about a rotation axis. The method for obtaining balance correction information includes a step of obtaining first vibration data along a direction intersecting a rotation axis when the rotation body rotates at a specific rotation speed without applying a test weight to the rotation body and without applying a test cut to the rotation body, a step of obtaining second vibration data along the direction intersecting the rotation axis when the rotation body rotates at a low frequency rotation speed lower than the specific rotation speed without applying a test weight to the rotation body, a step of obtaining third vibration data along the direction intersecting the rotation axis when the rotation body rotates at a specific rotation speed with the test weight applied to a first correction position in the rotation body or with the test cut applied thereto, a step of obtaining a first influence coefficient indicating a degree of influence of the test weight applied to the rotation body or the test cut on the rotation body using the first vibration data, a step of obtaining radial runout information indicating a degree of runout caused by a shape of the rotation body using the second vibration data, and a step of obtaining radial runout information using the first influence coefficient and the first vibration coefficient. Another aspect of the present disclosure is a device for acquiring balance correction information for correcting a dynamic unbalance of a rotating body rotatably supported by a non-contact bearing and rotated about a rotation axis. The apparatus for acquiring balance correction information includes a vibration data acquisition unit that receives first vibration data along a direction intersecting a rotation axis when a test weight is not applied to a rotating body and the rotating body rotates at a specific rotation speed is not applied to the r