Method for testing and identifying dynamic characteristic coefficients of sliding bearing

A technology of dynamic characteristics and sliding bearings, applied in the direction of mechanical bearing testing, etc., can solve the problems of large bearing difficulties and heavy test workload

Active Publication Date: 2013-02-13
GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The inversion test method needs to be equipped with special equipment to hang the bea...

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  • Method for testing and identifying dynamic characteristic coefficients of sliding bearing
  • Method for testing and identifying dynamic characteristic coefficients of sliding bearing
  • Method for testing and identifying dynamic characteristic coefficients of sliding bearing

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Embodiment Construction

[0089] Such as Figure 1-9 As shown, the bearing 1 to be identified, the counterweight plate 2, the rotating shaft 3, the coupling 4 and the motor 5 are set on the test bench, the power output shaft of the motor 5 is connected with the rotating shaft 3 through the coupling 4, and the other One end is installed in the bearing 1, and the part of the rotating shaft 3 located between the bearing and the coupling is the shaft section, and the counterweight plate 2 is fixedly fitted on the shaft section of the rotating shaft, and counterweights of different weights can be added to the counterweight plate 2 blocks, and can be set at different angles of the counterweight pan to form unbalanced counterweights, see figure 1 .

[0090] A test identification method for a dynamic characteristic coefficient of a sliding bearing of the present invention comprises the following steps:

[0091] ⑴Fix the bearing to be identified on one end of the test bench, see figure 1 ;

[0092] (2) The ...

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Abstract

The invention discloses a method for testing and identifying dynamic characteristic coefficients of a sliding bearing. The method comprises the following steps of: (1) fixing a bearing to be identified on a test bed; (2) arranging a key phase mark which serves as a reference for subsequent rotational speed analysis and key-phase synchronous acquisition analysis on a shaft segment of a rotation shaft, wherein the shaft segment of the rotation shaft is the part, which is positioned between the bearing and a power input end of a rotation shaft, of the rotation shaft; (3) applying unbalanced force which serves exciting force to the shaft segment of the rotation shaft; (4) raising the speed of the rotation shaft up to the test speed, and respectively measuring a dynamic strain signal of the shaft segment of the rotation shaft and the vibration displacement of the rotation shaft relative to the bearing; (5) computing the dynamic load which is born by the bearing according to the dynamic strain signal of the shaft segment of the rotation shaft; (6) substituting the dynamic load of the bearing and the vibration displacement of the rotation shaft into a computational formula corresponding to the lubrication theory of the bearing to obtain two sets of solving equations; (7) changing the unbalanced force to obtain another two sets of solving equations; and (8) solving the four sets of solving equations to obtain the dynamic characteristic coefficients of the bearing. By the method, large-sized bearings can be tested, large-sized equipment such as a vibration exciter is not required, and the identification result is accurate.

Description

technical field [0001] The invention relates to a test identification method for the dynamic characteristic coefficient of a sliding bearing of a rotating machine, which belongs to an upright test method and can provide test data for technicians to analyze the dynamic characteristic of a sliding bearing, and is mainly used in large rotating machinery in industries such as electric power, metallurgy, and petrochemical industry , such as steam turbines, compressors, generators, gas turbines, pumps, fans, etc. Background technique [0002] Sliding bearings are important components of large rotating machinery, which play a key role in supporting the rotor and are crucial to ensure the safe and stable operation of the unit. In the rotor-sliding bearing system, the dynamic characteristics of the bearing have a great influence on the dynamic characteristics of the system, such as unbalanced response, critical speed, stability, etc., and are the main considerations in unit design, f...

Claims

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Application Information

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IPC IPC(8): G01M13/04
Inventor 高庆水邓小文张楚刘石冯永新
Owner GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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