CN112525533A - Online detection method for contact angle of ball bearing of aero-engine - Google Patents

Online detection method for contact angle of ball bearing of aero-engine Download PDF

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Publication number
CN112525533A
CN112525533A CN202011191611.0A CN202011191611A CN112525533A CN 112525533 A CN112525533 A CN 112525533A CN 202011191611 A CN202011191611 A CN 202011191611A CN 112525533 A CN112525533 A CN 112525533A
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Prior art keywords
frequency
contact angle
vibration
engine
ball bearing
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CN202011191611.0A
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王海霞
冯鑫
徐胜
田金光
冯羽
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AECC Shenyang Liming Aero Engine Co Ltd
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AECC Shenyang Liming Aero Engine Co Ltd
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Priority to CN202011191611.0A priority Critical patent/CN112525533A/en
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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
    • G01M13/00—Testing of machine parts
    • G01M13/04—Bearings
    • G01M13/045—Acoustic or vibration analysis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
    • G01N13/02—Investigating surface tension of liquids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
    • G01N13/02—Investigating surface tension of liquids
    • G01N2013/0208—Investigating surface tension of liquids by measuring contact angle

Abstract

An aeroengine ball bearing contact angle on-line detection method, before the aeroengine runs, mount the magnetoelectric vibration velocity transducer on the mounting edge of the machine casket; the output of the sensor is connected to a vibration signal analyzer, and simultaneously connected to a rotating speed signal, and the vibration signal analyzer is provided with an order tracking analysis mode and used for testing and analyzing a vibration signal of the casing in a low rotating speed state of the aircraft engine; when characteristic frequencies appear on two sides of the high-pressure rotor, extracting the frequencies; and analyzing the fault type of the rolling bearing corresponding to the characteristic frequency, and calculating the actual contact angle of the ball bearing through a frequency formula. The invention has the advantages that: calculating the actual contact angle of the ball bearing by using the characteristic frequency of the small rotating speed state, and determining the rigidity of the bearing, so that the simulation calculation result of the aero-engine is closer to the operation rule of the actual engine; the method is used for improving the bearing parameters and improving the design level of the ball bearing; the method is used for finding vibration faults in advance and removing the vibration faults in a targeted manner, and the accuracy reaches more than 80%.

Description

Online detection method for contact angle of ball bearing of aero-engine
Technical Field
The invention relates to the field of aero-engines, in particular to an on-line detection method for an aero-engine ball bearing contact angle
Background
The vibrations of the rolling bearing can be caused by external sources of vibrations, as well as by the structural features and defects of the bearing itself. Furthermore, the hydrodynamic forces generated by the lubricant during bearing operation may also be a source of vibration (noise). The vibration source excites vibration when applied to the bearing components and nearby structural members. In general, a vibration sensor is arranged on a bearing seat in a bearing vibration test, but the vibration sensor cannot be arranged on the bearing seat when the whole aircraft engine is in test run, only the vibration of the mounting edge of a casing can be tested, and the abnormal vibration of the bearing is weakened through a transmission path. The problem of aircraft engine vibration often occurs at high rotating speed, and the vibration amplitude of the rotor is too high to cover the vibration of the characteristic frequency of the bearing.
Disclosure of Invention
The invention aims to test a vibration signal of a casing of an aircraft engine in a low rotating speed state, obtain the characteristic frequency of a bearing by utilizing a vibration signal spectrum analysis technology, calculate the actual contact angle of a ball bearing through a characteristic frequency formula and provide accurate parameters for determining the rigidity of the bearing and improving the parameters of the bearing; and judging the magnitude of the radial force of the engine according to the change of the bearing contact angle, and further analyzing the vibration fault reason of the aeroengine.
The invention provides an online detection method for an aircraft engine ball bearing contact angle, which is characterized by comprising the following steps: before the operation of the aircraft engine, a magnetoelectric vibration speed sensor is arranged on a mounting edge of a casing; connecting the output of the sensor to a vibration signal analyzer, and simultaneously connecting a rotating speed signal, wherein the vibration signal analyzer is provided with an order tracking analysis mode; in the running process of the aero-engine, testing and analyzing a vibration signal of a casing of the aero-engine in a low rotating speed state; when characteristic frequencies appear on two sides of the high-pressure rotor, extracting the frequencies; analyzing the fault type of the rolling bearing corresponding to the characteristic frequency, and calculating the actual contact angle of the ball bearing through frequency formulas (1) to (4);
the revolution frequency of the rolling bodies is as follows:
Figure BDA0002752945410000021
passage frequency of individual rolling elements on the raceway:
Figure BDA0002752945410000022
passage frequency of individual rolling elements on the raceway:
Figure BDA0002752945410000023
rolling element rotation frequency:
Figure BDA0002752945410000024
fi-inner race track frequency of revolution
fo-outer ring raceway rotation frequency.
The online detection method for the contact angle of the ball bearing of the aero-engine specifically comprises the following steps:
before an aircraft engine runs, mounting a magnetoelectric vibration speed sensor GGZ-6 on a mounting edge of a casing;
secondly, connecting the output of the sensor to a vibration meter for filtering and amplifying, connecting the alternating current output to a vibration signal analyzer, simultaneously connecting two rotating speed signals, and setting an order tracking analysis mode for the vibration signal analyzer;
setting a tracking high-pressure rotor vibration signal, and testing and analyzing the vibration of the casing of the aircraft engine in a low-rotating-speed state in the running process of the aircraft engine;
step four, in a low-rotation-speed state, when 0.805 and 1.195 times of high-voltage components appear on two sides of the high-voltage rotor, extracting the frequency;
analyzing that the rolling bearings corresponding to the characteristic frequency are two bearings supporting the high-pressure rotor, knowing the inner diameter, the outer diameter, the number of rolling bodies and the rotor frequency of the bearings, calculating and analyzing to obtain a component, namely a coupling component of the passing frequency and the high pressure of the rolling bodies on an inner raceway, and calculating a rolling bearing contact angle by using a formula (5) to obtain a contact angle of 36.8 degrees;
Figure BDA0002752945410000031
the invention is creative and novel in that the method for calculating the actual contact angle of the ball bearing by extracting the characteristic frequency of the small rotating speed state is firstly proposed.
The invention has the advantages that:
according to the online detection method for the contact angle of the ball bearing of the aero-engine, the actual contact angle of the ball bearing is calculated through the characteristic frequency of the low rotating speed state and is used for determining the rigidity of the bearing, so that the simulation calculation result of the aero-engine is closer to the operation rule of the actual engine; the method is used for improving the bearing parameters and improving the design level of the ball bearing; the method is used for finding vibration faults in advance and removing the vibration faults in a targeted manner, and the accuracy reaches more than 80%.
Drawings
The invention is described in further detail below with reference to the following figures and embodiments:
FIG. 1 is a schematic diagram of an online detection method for an aircraft engine ball bearing contact angle.
Detailed Description
Example 1
The invention provides an online detection method for an aircraft engine ball bearing contact angle, which is characterized by comprising the following steps: before the operation of the aircraft engine, a magnetoelectric vibration speed sensor is arranged on a mounting edge of a casing; connecting the output of the sensor to a vibration signal analyzer, and simultaneously connecting a rotating speed signal, wherein the vibration signal analyzer is provided with an order tracking analysis mode; in the running process of the aero-engine, testing and analyzing a vibration signal of a casing of the aero-engine in a low rotating speed state; when characteristic frequencies appear on two sides of the high-pressure rotor, extracting the frequencies; analyzing the fault type of the rolling bearing corresponding to the characteristic frequency, and calculating the actual contact angle of the ball bearing through frequency formulas (1) to (4);
the revolution frequency of the rolling bodies is as follows:
Figure BDA0002752945410000041
passage frequency of individual rolling elements on the raceway:
Figure BDA0002752945410000042
passage frequency of individual rolling elements on the raceway:
Figure BDA0002752945410000043
rolling element rotation frequency:
Figure BDA0002752945410000044
fi-inner race track frequency of revolution
fo-outer ring raceway rotation frequency.
The online detection method for the contact angle of the ball bearing of the aero-engine specifically comprises the following steps:
before an aircraft engine runs, mounting a magnetoelectric vibration speed sensor GGZ-6 on a mounting edge of a casing;
secondly, connecting the output of the sensor to a vibration meter for filtering and amplifying, connecting the alternating current output to a vibration signal analyzer, simultaneously connecting two rotating speed signals, and setting an order tracking analysis mode for the vibration signal analyzer;
setting a tracking high-pressure rotor vibration signal, and testing and analyzing the vibration of the casing of the aircraft engine in a low-rotating-speed state in the running process of the aircraft engine;
step four, in a low-rotation-speed state, when 0.805 and 1.195 times of high-voltage components appear on two sides of the high-voltage rotor, extracting the frequency;
analyzing that the rolling bearings corresponding to the characteristic frequency are two bearings supporting the high-pressure rotor, knowing the inner diameter, the outer diameter, the number of rolling bodies and the rotor frequency of the bearings, calculating and analyzing to obtain a component, namely a coupling component of the passing frequency and the high pressure of the rolling bodies on an inner raceway, and calculating a rolling bearing contact angle by using a formula (5) to obtain a contact angle of 36.8 degrees;
Figure BDA0002752945410000051
the invention is creative and novel in that the method for calculating the actual contact angle of the ball bearing by extracting the characteristic frequency of the small rotating speed state is firstly proposed.

Claims (2)

1. An online detection method for an aero-engine ball bearing contact angle is characterized by comprising the following steps: before the operation of the aircraft engine, a magnetoelectric vibration speed sensor is arranged on a mounting edge of a casing; connecting the output of the sensor to a vibration signal analyzer, and simultaneously connecting a rotating speed signal, wherein the vibration signal analyzer is provided with an order tracking analysis mode; in the running process of the aero-engine, testing and analyzing a vibration signal of a casing of the aero-engine in a low rotating speed state; when characteristic frequencies appear on two sides of the high-pressure rotor, extracting the frequencies; analyzing the fault type of the rolling bearing corresponding to the characteristic frequency, and calculating the actual contact angle of the ball bearing through frequency formulas (1) to (4);
the revolution frequency of the rolling bodies is as follows:
Figure FDA0002752945400000011
passage frequency of individual rolling elements on the raceway:
Figure FDA0002752945400000012
passage frequency of individual rolling elements on the raceway:
Figure FDA0002752945400000013
rolling element rotation frequency:
Figure FDA0002752945400000014
fi-inner race track frequency of revolution
fo-outer ring raceway rotation frequency.
2. The online detection method of the contact angle of the ball bearing of the aircraft engine according to claim 1, characterized in that: the online detection method for the contact angle of the ball bearing of the aero-engine specifically comprises the following steps:
before an aircraft engine runs, mounting a magnetoelectric vibration speed sensor GGZ-6 on a mounting edge of a casing;
secondly, connecting the output of the sensor to a vibration meter for filtering and amplifying, connecting the alternating current output to a vibration signal analyzer, simultaneously connecting two rotating speed signals, and setting an order tracking analysis mode for the vibration signal analyzer;
setting a tracking high-pressure rotor vibration signal, and testing and analyzing the vibration of the casing of the aircraft engine in a low-rotating-speed state in the running process of the aircraft engine;
step four, in a low-rotation-speed state, when 0.805 and 1.195 times of high-voltage components appear on two sides of the high-voltage rotor, extracting the frequency;
analyzing that the rolling bearings corresponding to the characteristic frequency are two bearings supporting the high-pressure rotor, knowing the inner diameter, the outer diameter, the number of rolling bodies and the rotor frequency of the bearings, calculating and analyzing to obtain a component, namely a coupling component of the passing frequency and the high pressure of the rolling bodies on an inner raceway, and calculating a rolling bearing contact angle by using a formula (5) to obtain a contact angle of 36.8 degrees;
Figure FDA0002752945400000021
CN202011191611.0A 2020-10-30 2020-10-30 Online detection method for contact angle of ball bearing of aero-engine Pending CN112525533A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113588267A (en) * 2021-07-27 2021-11-02 成都飞机工业（集团）有限责任公司 Electric main shaft bearing structure parameter inference method based on vibration spectrum analysis
CN114136617A (en) * 2021-11-29 2022-03-04 中国航发哈尔滨轴承有限公司 Dynamic monitoring method for high-speed spindle bearing
CN114235401A (en) * 2021-11-29 2022-03-25 洛阳轴承研究所有限公司 Angular contact ball bearing measuring isolation block and contact angle measuring method

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CN103471854A (en) * 2013-09-26 2013-12-25 沈阳黎明航空发动机(集团)有限责任公司 Aero-engine body vibration characteristic analysis method
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113588267A (en) * 2021-07-27 2021-11-02 成都飞机工业（集团）有限责任公司 Electric main shaft bearing structure parameter inference method based on vibration spectrum analysis
CN113588267B (en) * 2021-07-27 2022-06-14 成都飞机工业（集团）有限责任公司 Electric main shaft bearing structure parameter inference method based on vibration spectrum analysis
CN114136617A (en) * 2021-11-29 2022-03-04 中国航发哈尔滨轴承有限公司 Dynamic monitoring method for high-speed spindle bearing
CN114235401A (en) * 2021-11-29 2022-03-25 洛阳轴承研究所有限公司 Angular contact ball bearing measuring isolation block and contact angle measuring method
CN114235401B (en) * 2021-11-29 2023-08-11 洛阳轴承研究所有限公司 Spacer for angular contact ball bearing measurement and contact angle measurement method
CN114136617B (en) * 2021-11-29 2023-09-08 中国航发哈尔滨轴承有限公司 Dynamic monitoring method for high-speed main shaft bearing

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Application publication date: 20210319