CN110044585A - A kind of spherical shape partition fatigue experimental device and test method - Google Patents
A kind of spherical shape partition fatigue experimental device and test method Download PDFInfo
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- CN110044585A CN110044585A CN201910167044.6A CN201910167044A CN110044585A CN 110044585 A CN110044585 A CN 110044585A CN 201910167044 A CN201910167044 A CN 201910167044A CN 110044585 A CN110044585 A CN 110044585A
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- partition
- spherical
- briquetting
- pressure head
- undersetting
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention provides a kind of spherical partition fatigue experimental device and test method, for simulating the fatigue examination of the metal spacer of resilient bearing, the spherical shape partition fatigue experimental device includes: rigid undersetting (1), spherical partition (2), several rubber layers (3), briquetting (4), vibrate pressure head (5) and clamping screw (6), it is characterized by: spherical partition (2) is fixed between rigid undersetting (1) and briquetting (4) by clamping screw (6), rigid undersetting (1), spherical partition (2) and briquetting (4) pass through rubber layer (3) bonding by Vulcanization together, vibration pressure head (5) lower surface is contacted with spherical partition outer rim upper surface, rigid undersetting (1), spherical partition (2), briquetting (4), vibrate pressure head (5) central coaxial.The present invention has many advantages, such as that simple structure, installation maintenance aspect, test method control are flexible, at low cost.
Description
Technical field
The invention belongs to fatigue test technologies, and the fatigue examination of the metal spacer for simulating resilient bearing is related to one kind
Spherical partition fatigue test method.
Technical background
Spherical shaped elastomeric bearing is the critical function component of helicopter rotor system, and common basic structure is by big connector, small
Connector, spherical metal partition and rubber lamination composition, while bearing compressive load, torsional load, waving load and radial load,
Bearing fatigue life is crucial technical examination index, wherein on resilient bearing fatigue influence it is maximum mainly by compressive load and
The superimposed load for waving load determines that fatigue rupture form is mainly shown as the fatigue crack of rubber and metal spacer, partition
Fatigue crack primarily occur in and wave the consistent two sides outer rim in direction, fatigue test is carried out to resilient bearing although can be quasi-
The fatigue life of true monitoring metal spacer, but higher requirement is proposed to fatigue rig and technology, while when fatigue
Between the period it is long, experimentation cost is high, and the Fatigue Life Assessment of partition under the conditions of same load after material or structure change need to be mentioned
For a kind of simple and effective evaluation method.
Summary of the invention
Simple, installation maintenance aspect that the object of the present invention is to provide structures, test method control ball flexible, at low cost
Shape partition fatigue test method.
The technical scheme is that a kind of spherical shape partition fatigue experimental device, for simulate the metal of resilient bearing every
The fatigue examination of piece, the spherical shape partition fatigue experimental device include: rigid undersetting 1, spherical partition 2, several rubber layers
3, briquetting 4, vibration pressure head 5 and clamping screw 6, it is characterised in that: spherical partition 2 is by clamping screw 6 in rigid 1 He of undersetting
It is fixed between briquetting 4, rigid undersetting 1, spherical partition 2 are together with briquetting 4 is by 3 bonding by Vulcanization of rubber layer, vibration
5 lower surface of pressure head is contacted with spherical partition outer rim upper surface, rigid undersetting 1, spherical partition 2, briquetting 4, vibration 5 center of pressure head
Coaxially.
Preferably, 4 external profile diameter D1 of briquetting, vibration 5 inner edge diameter D2 of pressure head, rigid undersetting 1 external profile diameter D3 and
Meet between the external profile diameter D4 of spherical partition 2: D1 < D2 < D4, D1 < D3 < D4.
Preferably, the compressive load born by applying spherical partition 2 to clamping screw 6 is applied by vibration pressure head 5
Axial displacement load makes spherical partition 2 generate local dynamic stress；Applying load by briquetting 4 and vibration pressure head 5 makes spherical partition 2
The stress amplitude that outer rim generates is approximately equal with stress amplitude of the metal spacer of resilient bearing under actual condition.
Preferably, pass through the stress distribution of finite element analysis computation spherical shaped elastomeric bearing each metal spacer under superimposed load
Trend chooses the maximum metal spacer of stress as fatigue examination object；Establish rigid undersetting 1, spherical partition 2, rubber layer
3, the finite element analysis model of briquetting 4 and vibration pressure head 5；Apply the maximum that compression displacement generates spherical partition 2 on briquetting 4
Stress is consistent with maximum stress of examination object metal spacer under the conditions of compressive load, applies compression displacement on briquetting 4
On the basis of, while applying the maximum stress and examination object gold that compression displacement load generates spherical partition 2 on vibration pressure head 5
It is consistent to belong to maximum stress of partition under the conditions of superimposed load, the compression displacement on briquetting 4 will be calculated as clamping screw 6
Dead load, be calculated vibration pressure head 5 on compression displacement as vibrate pressure head 5 dynamic loading.Technical effect of the invention
It is: has provided a kind of easy fatigue test method of flange structure spherical shape partition, significantly reduces the spherical partition tired longevity
The technical requirements of examination and the device is complicated degree are ordered, experimentation cost is reduced, shortens the test period, biggish warp can be generated
Ji benefit.
Detailed description of the invention
Fig. 1 schematic structural view of the invention；
Fig. 2 embodiment structure size schematic diagram；
Fig. 3 is partition outer rim concentrated stress amplitude and load deflection numerical simulation relation curve.
Specific embodiment
The structure and bearer properties of present invention combination spherical shaped elastomeric bearing, have carried out simplified partial to its structure and load,
Maximum stress when guaranteeing partition fatigue test is almost the same, significantly simplifies the Assessment of resilient bearing spherical shape partition, greatly
Width shortens experimentation cost and period.Below with reference to embodiment and attached drawing, the present invention is described further:
The purpose of the present invention is the fatigue of spherical partition is examined by the fatigue test method for simplifying spherical shaped elastomeric bearing
Service life, therefore stress level of the spherical partition through the invention after test method load should will keep one with when applying operating condition load
It causes, carrying out fatigue life examination on this basis just has credibility.
By finite element analysis computation spherical shaped elastomeric bearing, the stress distribution of each partition becomes under main superimposed load first
Gesture chooses the maximum spherical partition of stress as fatigue examination object, designs rigidity according to the spherical spacer structure for choosing examination
Undersetting, briquetting and rubber layer, briquetting should have enough rigidity, prevent from being deformed during bolt is locked, on partition
The thickness of lower rubber layer should be opened respectively in rigid undersetting and briquetting center and connect for bolt with being consistent in actual parts
Rigid undersetting, spherical partition, briquetting and rubber are formed one through high temperature vulcanized by molding die by the threaded hole and unthreaded hole connect
A entirety should prevent undersetting screwed hole of centre and briquetting unthreaded hole to be filled with rubber in sulfidation.
Rigid undersetting, spherical partition, rubber, briquetting and the finite element analysis model for vibrating pressure head are established, on briquetting
Apply the stress and practical almost the same, analysis vibration displacement or concentrated force, vibration pressure head inner edge that compression displacement generates partition
Relationship between diameter D3 and width W and spherical partition stress distribution and stress amplitude, when the stress distribution of spherical partition with answer
When power amplitude and its almost the same under the conditions of bearing actual bearer, the vibration displacement or concentrated force, vibration under the state are determined
Dynamic head inner edge diameter D3 and width W are displaced load according to the practical control precision flexible choice of testing machine or concentrated force load.
By rigid undersetting, vibration pressure head connect respectively with rigid connecting rod, single shaft fatigue testing machine fixing end with
Tache motorice fixes rigid undersetting and vibration pressure head respectively, is arranged accordingly according to the load deflection of above-mentioned analytical calculation or concentrated force
Fatigue test spectrum, fatigue test can be carried out by reasonably selecting loading frequency according to test period length, every in fatigue process
The loading force and displacement data in several periods are recorded in real time every certain time, and whether real time inspection spherical shape partition cracks.
Embodiment
Fig. 2 is a kind of specific structure size of structure spherical shape partition fatigue test scheme, wherein the lower peripheral surface of spherical partition
Radius is 48mm, and upper spherical radius is 48.8mm, and the bondline thickness above and below partition is 1mm, and the external profile diameter of briquetting is 79mm,
The external profile diameter of rigid undersetting is 82mm, and the external profile diameter of spherical partition ring flange is 87mm, and vibration pressure head inner edge diameter is
81mm, by establishing rigid undersetting, rubber, briquetting, the finite element analysis model for vibrating pressure head, calculate analysis obtain it is spherical every
Piece outer rim stress amplitude and vibration displacement relation curve load dynamic position as shown in figure 3, determining according to stress amplitude-displacement curve
It moves.
Claims (4)
1. a kind of spherical shape partition fatigue experimental device, which is characterized in that the spherical shape partition fatigue experimental device includes: under rigidity
Support (1), spherical partition (2), several rubber layers (3), briquetting (4), vibration pressure head (5) and clamping screw (6), spherical partition
(2) it is fixed between rigid undersetting (1) and briquetting (4) by clamping screw (6), rigid undersetting (1), spherical partition
(2) and briquetting (4) passes through rubber layer (3) bonding by Vulcanization together, vibration pressure head (5) lower surface and spherical partition outer rim upper surface
Contact, rigid undersetting (1), spherical partition (2), briquetting (4), vibration pressure head (5) central coaxial.
2. spherical shape partition fatigue experimental device as described in claim 1, it is characterised in that: briquetting (4) external profile diameter D1, vibration
Meet between pressure head (5) inner edge diameter D2, the external profile diameter D3 of rigid undersetting (1) and the external profile diameter D4 of spherical partition (2):
D1 < D2 < D4, D1 < D3 < D4.
3. spherical shape partition fatigue experimental device as described in claim 1, it is characterised in that: by being applied to clamping screw (6)
The compressive load that ball adding shape partition (2) is born, applying axial displacement load by vibration pressure head (5) generates spherical partition (2)
Local dynamic stress；By briquetting (4) and vibration pressure head (5) apply load make spherical partition (2) outer rim generate stress amplitude with
Stress amplitude of the metal spacer of resilient bearing under actual condition is approximately equal.
4. the test method of spherical shape partition fatigue experimental device as described in claim 1, it is characterised in that: pass through finite element analysis
The stress distribution trend of spherical shaped elastomeric bearing each metal spacer under superimposed load is calculated, the maximum metal spacer of stress is chosen and makees
Object is examined for fatigue；Establish rigid undersetting (1), spherical partition (2), rubber layer (3), briquetting (4) and vibration pressure head (5)
Finite element analysis model；Apply the maximum stress and examination object gold that compression displacement generates spherical partition (2) on briquetting (4)
It is consistent to belong to maximum stress of partition under the conditions of compressive load, on the basis of applying compression displacement on briquetting (4), while shaking
Apply the maximum stress and examine object metal spacer folded that compression displacement load generates spherical partition (2) on dynamic head (5)
Maximum stress under the conditions of load lotus is consistent, and the compression displacement on briquetting (4) will be calculated as the static load of clamping screw (6)
Dynamic loading of the compression displacement as vibration pressure head (5) in vibration pressure head (5) is calculated in lotus.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910167044.6A CN110044585B (en) | 2019-03-05 | 2019-03-05 | Spherical spacer fatigue test device and test method |
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| CN201910167044.6A CN110044585B (en) | 2019-03-05 | 2019-03-05 | Spherical spacer fatigue test device and test method |
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| CN110044585B CN110044585B (en) | 2021-08-03 |
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Cited By (1)
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| CN110702409A (en) * | 2019-09-29 | 2020-01-17 | 中国航发北京航空材料研究院 | Elastic joint bearing fatigue test device |
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| US9927419B2 (en) * | 2012-06-26 | 2018-03-27 | Ge Oil & Gas Uk Limited | Sample testing apparatus and method |
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| CN110044585B (en) | 2021-08-03 |
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