CN106226067B - A kind of automotive chain revolution fatigue test condition determination method - Google Patents
A kind of automotive chain revolution fatigue test condition determination method Download PDFInfo
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- CN106226067B CN106226067B CN201610524739.1A CN201610524739A CN106226067B CN 106226067 B CN106226067 B CN 106226067B CN 201610524739 A CN201610524739 A CN 201610524739A CN 106226067 B CN106226067 B CN 106226067B
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- chain
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- revolving speed
- noise
- fatigue
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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
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/023—Power-transmitting endless elements, e.g. belts or chains
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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
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/027—Test-benches with force-applying means, e.g. loading of drive shafts along several directions
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to a kind of automotive chains to turn round fatigue test condition determination method, by carrying out the tensile strength Q that tension test determines chain to chain, by carrying out the revolving speed that noise fest determines chain actual noise value and noise maximum value under different rotating speeds to chain, test load and revolving speed are determined according to the revolving speed of tensile strength Q and noise maximum value, the final fatigue limit for determining automotive chain under bad working environments.The present invention determines revolution fatigue test load, uses revolving speed when noise maximum as test speed, reduce invalid test number (TN), quickly determine the fatigue strength under automotive chain bad working environments by carrying out chain pull test and noise fest.
Description
Technical field
The invention patent relates to technical field of chain transmission, really more particularly to a kind of automotive chain revolution fatigue test condition
Determine method.
Background technique
Now with the development of reliability engineering, three big quality index-technical indicators, the economy of automobile engine are evaluated
In index and reliability index, reliability index occupies increasingly consequence.New automobile engine is more and more adopted
Use chain as the crucial transmission parts of its timing system, oil pump systems etc..As the key factor of reliability index, automotive chain
The height of fatigue properties level directly influences the performance of function of the engine.
Chain manufacture and main engine producer mainly pass through revolution fatigue tester, engine assembly is tested, rack is more
The multi-impulse fatigue performance of automotive chain is evaluated in punching with wear test and road vehicle running test.Under various factors restricts, chain
Manufacturing firm generally investigates the fatigue behaviour of product using revolution fatigue tester.
However, chain conveyer industry temporarily turns round fatigue without automotive chain at present since product is more, structure is more, operating condition differs greatly
Testing standard.Due to lack of experience, experimental condition loses contact with reality operating condition for chain producer, cannot quickly and effectively grasp the fatigue of product
Characteristic tests the result obtained and also tends to have larger gap with the test of main engine plants' engine assembly or road test test result.
Under actual condition, other than the factors such as chain structure, material, the fatigue limit of chain mainly by magnitude of load and
Acting frequency determines.Under the conditions of load range determines, chain could quickly be determined using suitable acting frequency, that is, chain wheel speed
Fatigue limit of the item under bad working environments.Chain wheel speed, which is arranged, unreasonable frequently can lead to the chain that the test period is too long or obtains
Fatigue strength distortion.
Summary of the invention
The present invention provides a kind of revolution fatigue test condition determination method, realizes and quickly determines chain under bad working environments
Fatigue limit.
The present invention influences the experimental factor of fatigue behaviour by the stress condition in the analysis automotive chain course of work, research,
Revolution fatigue load is determined by carrying out pull test to chain, determines revolution fatigue test by carrying out noise fest to chain
The revolving speed of drive sprocket is finally determining fatigue limit of the automotive chain under bad working environments.
By theory analysis and verification experimental verification, when its intrinsic frequency section works, amplitude increases automotive chain, and stress condition is disliked
Change, the fatigue behaviour of chain can be tested to greatest extent, meanwhile, in its intrinsic frequency section, the noise figure of catenary system sending
It is the largest.
In response to this, the present invention proposes a kind of automotive chain revolution fatigue test method, accurate setting revolution fatigue examination
Condition is tested, the fatigue limit of test chain is quick and precisely obtained.
The present invention is by carrying out the tensile strength Q that tension test determines chain to chain, by carrying out noise examination to chain
The revolving speed for testing determining chain actual noise value and noise maximum value under different rotating speeds, according to tensile strength Q and noise maximum value
Revolving speed determine test load and revolving speed, the final fatigue limit for determining automotive chain under bad working environments.
Chain provided by the invention turns round testing method of endurance performance, and specific method is:
1) universal testing machine determines the tensile strength Q of chain
2) revolving speed is N when engine idling1, engine peak speed N2.Test revolution fatigue tester it is unloaded, turn
Speed is
(N1+ 500n) r/r/min n=0,1,2 ...
(N1+500n)≤N2
Under the conditions of background noise value and revolving speed be N2When background noise value.
3) test automotive chain is mounted on revolution fatigue tester, tests chain in load 10%Q, revolving speed is
(N1+ 500n) r/min n=0,1,2 ...
(N1+500n)≤N2
Under the conditions of composite noise value and revolving speed be N2When composite noise value.
4) data processing obtains actual noise value of the chain under each speed conditions, determines and turns when noise figure maximum
Fast N3。
5) chain revolution fatigue test drive sprocket revolving speed is set to N3± 200r/min, test load step-length M=(1~
2) %Q, it is determined as test load is set to
%Q n=0,1,2 ... (12+Mn)
Chain provided by the invention turns round testing method of endurance performance, the beneficial effect is that: setting is reasonably turned round tired
Labor test speed and load, react fatigue of the chain under engine real working condition at the significant time for shortening experimental condition and groping
The limit.
Detailed description of the invention
The noise figure that Fig. 1 car model chain measures under different drive sprocket revolving speeds
Specific embodiment
Below with reference to a case study on implementation, revolution testing method of endurance performance provided by the invention is described in detail.
Engine idling is 800r/min, maximum speed 7000r/min, determines that chain turns in test by noise fest
Speed be 800r/min, 1300r/min, 1800r/min, 2300r/min, 2800r/min, 3300r/min, 3800r/min,
4300r/min, 4800r/min, 5300r/min, 5800r/min, 6300r/min, 6800r/min, 7000r/min, load are
Actual noise value (such as Fig. 1) under the conditions of 1.960kN.Noise is maximum when 4800r/min, as revolution fatigue test revolving speed.
Determine that the chain tensile strength is Q=14.7kN by pull test, load step is set to 1.5%Q.
By the present invention, test load is respectively 1.76kN, 2.20kN, 2.42kN, 2.64kN, 2.86kN ...
Test result such as table 1.
Certain the car model chain of table 1 turns round fatigue test results
For verifying revolving speed, the influence to test result is set, it is identical in load, 3 times are carried out under revolving speed different condition tests, 3
Secondary test result compares, specific as follows:
Test 1: load 2.86kN, revolving speed 2500r/min
As a result: chain circulation 1 × 107It is secondary not broken.
Test 2: load 2.86kN, revolving speed 6500r/min
As a result: chain circulation 1 × 107It is secondary not broken.
Test 3: load 2.86kN, revolving speed is determined as 4800r/ according to this test method, by actual noise value size (Fig. 1)
min。
As a result: chain circulation 3.5020 × 106Secondary fracture.
The present invention determines test load and revolving speed by automotive chain tensile strength and noise figure, fast and accurately obtains vapour
Revolution fatigue strength of the blockchain under bad working environments.Automotive chain revolution fatigue test there is no in the industry test method standard, test bar
Part setting is unreasonable to be caused to test in vain, and the present invention determines revolution fatigue examination by carrying out chain pull test and noise fest
It tests and uses load, use revolving speed when noise maximum as test speed, reduce invalid test number (TN), quickly determine that automotive chain is disliked
Fatigue strength under bad operating condition.
Claims (3)
1. a kind of automotive chain turns round fatigue test condition determination method, which is characterized in that by carrying out tension test to chain
The tensile strength Q for determining chain determines that chain actual noise value and is made an uproar under different rotating speeds by carrying out noise fest to chain
The revolving speed of sound maximum value determines test load and revolving speed according to the revolving speed of tensile strength Q and noise maximum value, finally determines vapour
Fatigue limit of the blockchain under bad working environments.
2. a kind of automotive chain as described in claim 1 turns round fatigue test condition determination method, it is characterised in that: determine chain
Item includes: the step of the revolving speed of actual noise value and noise maximum value under different rotating speeds
1) test revolution fatigue tester is in unloaded, revolving speed
(N1+500n) r/min, n=0,1,2 ...
(N1+500n)≤N2
Under the conditions of background noise value and revolving speed be N2 when background noise value；
2) test automotive chain is mounted on revolution fatigue tester, tests chain in load 10%Q, revolving speed is
(N1+500n) r/min, n=0,1,2 ...
(N1+500n)≤N2
Under the conditions of composite noise value and revolving speed be N2 when composite noise value；
3) data processing obtains actual noise value of the chain under each speed conditions, determines revolving speed N3 when noise figure maximum；
Revolving speed when N1 is engine idling, N2 is engine peak speed.
3. a kind of automotive chain as claimed in claim 2 turns round fatigue test condition determination method, it is characterised in that: chain returns
Turning fatigue test drive sprocket revolving speed is N3± 200r/min, test load step-length M=(1~2) %Q, test load are
(12+Mn) %Q, n=0,1,2 ....
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610524739.1A CN106226067B (en) | 2016-07-05 | 2016-07-05 | A kind of automotive chain revolution fatigue test condition determination method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610524739.1A CN106226067B (en) | 2016-07-05 | 2016-07-05 | A kind of automotive chain revolution fatigue test condition determination method |
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| CN106226067A CN106226067A (en) | 2016-12-14 |
| CN106226067B true CN106226067B (en) | 2019-04-19 |
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| CN201610524739.1A Active CN106226067B (en) | 2016-07-05 | 2016-07-05 | A kind of automotive chain revolution fatigue test condition determination method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102020210904A1 (en) | 2020-08-28 | 2022-03-03 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method and device for monitoring a condition of a lift chain of an aerial work tool and aerial work tool |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007001195A1 (en) * | 2007-01-05 | 2008-07-10 | Siemens Ag | Method and device for monitoring a belt drive on an internal combustion engine |
| CN103983454A (en) * | 2014-05-26 | 2014-08-13 | 湖南科技大学 | Wind turbine generator transmission chain full-working-condition test simulation device |
-
2016
- 2016-07-05 CN CN201610524739.1A patent/CN106226067B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007001195A1 (en) * | 2007-01-05 | 2008-07-10 | Siemens Ag | Method and device for monitoring a belt drive on an internal combustion engine |
| CN103983454A (en) * | 2014-05-26 | 2014-08-13 | 湖南科技大学 | Wind turbine generator transmission chain full-working-condition test simulation device |
Non-Patent Citations (1)
| Title |
|---|
| 链条的极限拉伸载荷对疲劳性能的探讨;朱国仁等;《机械设计与研究》;20031031;第19卷(第5期);全文 |
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| CN106226067A (en) | 2016-12-14 |
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