CN106555810A - The system of the stress suffered by crankshaft arrangement and test bent axle - Google Patents
The system of the stress suffered by crankshaft arrangement and test bent axle Download PDFInfo
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- CN106555810A CN106555810A CN201510640716.2A CN201510640716A CN106555810A CN 106555810 A CN106555810 A CN 106555810A CN 201510640716 A CN201510640716 A CN 201510640716A CN 106555810 A CN106555810 A CN 106555810A
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- crankshaft
- signal
- bent axle
- stress
- conversion module
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Abstract
The invention discloses the system of a kind of crankshaft arrangement and the stress suffered by test bent axle, the crankshaft arrangement includes：Crankshaft body；And, strain gauge is fixed on the outer surface of crankshaft body, for measuring the stress being subject to when bent axle works.Thus, it is possible to realize the dynamic test of the stress suffered by bent axle.In engine real-world operation, the stress that bent axle is subject to can be tested in real time, so as to provide accurate stress data value for the crankshaft designs step such as bent axle simulation calculation and crankshaft fatigue reliability test.
Description
Technical field
The present invention relates to engine art, in particular it relates to suffered by a kind of crankshaft arrangement and test bent axle
Stress system.
Background technology
With the continuous progress of science and technology, automobile industry is achieved and is by leaps and bounds developed, and user is to sending out
The performance requirement of motivation also more and more higher.Bent axle is one of critical piece of reciprocating-piston engine,
Its security reliability is directly connected to the life and reliability of the whole machine of engine, therefore bent axle must have foot
Enough intensity, rigidity, resistance to impact and certain toughness, while structure is as far as possible compact, lightweight and work
Skill is good.In engine working process, bent axle not only needs what the in-cylinder combustion for bearing mechanical periodicity was caused
Gas impulsive force, in addition it is also necessary to bear larger alternating torsion torque, the test experiments of bent axle are that engine grinds
Important process in sending out.
At present, determine that the method for the stress suffered by bent axle relies primarily on empirical equation calculating method, that is, pass through
The quality of cylinder gas pressure, piston and piston pin and bent axle, engine speed etc. are calculated indirectly
Effect to bent axle.The method precision is low, and error is big, can only estimate static load, it is impossible to for emulation meter
Calculate and analysis on crankshaft fatigue life-span test provides accurate stress data value.Additionally, the bent axle of Jing the method manufacture
Heaviness, off-dimension, rigidity and intensity are not enough.
The content of the invention
The purpose of the present invention be for cannot real-time testing bent axle work when suffered stress problem, carry
For a kind of system of the stress suffered by crankshaft arrangement and test bent axle.
To achieve these goals, according to an aspect of the present invention, there is provided a kind of crankshaft arrangement, the song
Shaft device includes crankshaft body；And strain gauge, it is fixed on the outer surface of crankshaft body, is used for
The stress that test bent axle is subject to when working.
Preferably, the strain gauge is fixed at the characteristic point on the outer surface of the crankshaft body,
Wherein described characteristic point is located at the axle journal fillet of the trunnion and/or the crank body of the crankshaft body
Place.
Preferably, the strain gauge is fixed in stress groove, wherein the stress groove is located at the song
On the outer surface of shaft body.
Preferably, the stress groove is located at the characteristic point on the outer surface of the crankshaft body, wherein institute
State characteristic point to be located at the axle journal fillet of trunnion and/or the crank body of the crankshaft body.
Preferably, battery is fixed with the one side of the crank arm outer surface of the crankshaft body, the battery
Electrically connect with the strain gauge.
According to a further aspect in the invention, the system for also providing the stress suffered by a kind of test bent axle, should
System includes the crankshaft arrangement provided according to the present invention；And signal processing unit, at the signal
Reason unit includes：Signal conversion module, is electrically connected with the strain gauge in the crankshaft arrangement, is used for
Electric signal is obtained according to the resistance of the strain gauge；Analog-to-digital conversion module, for by signal modulus of conversion
The electric signal that block is obtained is converted into data signal；And memory module, come from analog-to-digital conversion for storage
The data signal of module.
Preferably, the system also includes battery, is fixed on the crank arm outer surface of the crankshaft body
Simultaneously go up, the battery is electrically connected with the signal processing unit.
Preferably, the signal processing unit also includes Signal-regulated kinase, with the signal conversion module
Electrical connection, is amplified filtering for the electric signal after the signal conversion module is changed, and will amplify
Filtered electric signal output is to the analog-to-digital conversion module.
Preferably, the signal processing unit is fixed on the outer surface of the crankshaft body.
Preferably, the system also includes battery, is fixed on the crank arm outer surface of the crankshaft body
Simultaneously go up, the battery is electrically connected with the signal processing unit, the fixed bit of the signal processing unit
Put on the another side of the crankshaft body crank arm outer surface, along the axial direction of the crankshaft arrangement with it is described
The fixed position of battery is relative.
Preferably, the signal conversion module includes electric bridge, with the strain gauge in the crankshaft arrangement
Electrical connection, for obtaining electric signal according to the resistance of the strain gauge.
Preferably, the electric bridge is direct current wheatstone bridge or direct-flow double bridge.
Preferably, the resistance in the electric bridge is fixed value resistance.
Preferably, the memory module includes：Memory element, for storing the stress suffered by bent axle
Data signal；And treatment element, it is connected with the analog-to-digital conversion module, for by the numeral for receiving
Signal is stored in the memory element.
Preferably, the memory element is pluggable.
By above-mentioned technical proposal, it is possible to achieve the dynamic test of the stress suffered by bent axle.In engine
The course of work in, stress that can be suffered by simple and reliable ground real-time testing bent axle, be bent shaft design,
Simulation calculation and Fatigue reliability testing provide accurate stress data value, i.e., export in analog-to-digital conversion module
Data signal.Additionally, the stress data value suffered by measured bent axle has, error is little, high precision
The characteristics of.Whole system is simple to manufacture, low cost, installation and debugging are convenient and reliable, to carry out
The design such as bent axle high intensity, lightweight, low cost is there is provided important measuring technology means.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of specification, with
Detailed description below is used for explaining the present invention together, but is not construed as limiting the invention.
In accompanying drawing：
Fig. 1 is a kind of crankshaft arrangement of embodiment offer of the invention along its trunnion radial direction
Sectional view.
Fig. 2 is the front view of the local of the crankshaft arrangement that a kind of embodiment of the invention is provided.
Fig. 3 is the front view of the local of the crankshaft arrangement that another embodiment of the invention is provided.
Fig. 4 is that stress suffered by the test bent axle that a kind of embodiment of the invention is provided is
The structured flowchart of system.
Fig. 5 is the stress suffered by the test bent axle that another embodiment of the invention is provided
The structured flowchart of system.
Fig. 6 is the structured flowchart of the signal processing unit that a kind of embodiment of the invention is provided.
Fig. 7 is the front view of the local of the crankshaft arrangement that another embodiment of the invention is provided.
Fig. 8 is the structured flowchart of the memory module that a kind of embodiment of the invention is provided.
Description of reference numerals
100 crankshaft arrangement, 101 crankshaft body
102 strain gauge, 103 trunnion
104 crank body, 105 fillet
106 stress groove, 107 crank arm
108 battery, 200 signal processing unit
201 signal conversion module, 202 analog-to-digital conversion module
203 memory module, 204 Signal-regulated kinase
2031 memory element, 2032 treatment element
Specific embodiment
The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that
Specific embodiment described herein is merely to illustrate and explains the present invention, is not limited to the present invention.
Fig. 1 is a kind of crankshaft arrangement of embodiment offer of the invention along its trunnion radial direction
Sectional view.As shown in figure 1, the crankshaft arrangement 100 can include：Crankshaft body 101；And stress
Sensor 102, is fixed on the outer surface of crankshaft body 101, suffered when bent axle works for testing
Stress.
The strain gauge 102 can have various ways, for example：Capacitance-type strain gauge force snesor, Hall
Formula strain gauge, optical fiber type strain gauge, resistance-type strain gauge etc..What the present invention was used
Strain gauge 102 is resistance strain gage, and the strain gauge is the element for measuring strain, can
The change strained on mechanical component is converted into into the change of resistance, is convenient for measuring, and simple structure.But
It should be appreciated that strain gauge of the present invention is not limited to this.
Thus, the strain gauge 102 in engine working process, on 101 outer surface of crankshaft body
Can accurately, dynamically test the stress suffered by bent axle.
Fig. 2 is the front view of the local of the crankshaft arrangement that another embodiment of the invention is provided.
Strain gauge 102 may be mounted at any position on 101 outer surface of crankshaft body.Preferable case
Under, as shown in Fig. 2 the strain gauge 102 can be fixed on the outer surface of crankshaft body 101
Characteristic point at, wherein, characteristic point may be located at the trunnion 103 and/or crank sheet of crankshaft body 101
At the axle journal fillet 105 of body 104.
On the position of the characteristic point at axle journal knuckle, stress concentration phenomenon is serious, easily sends out
Raw fracture, the fatigue rupture of bent axle along occurring herein, can compare the other positions of crankshaft body 101 and
Speech, the test value at the position are more meaningful to crankshaft designs, therefore in a preferred embodiment, will
Strain gauge 102 is fixed at the characteristic point on the outer surface of crankshaft body 101.
Additionally, as shown in Fig. 2 the strain gauge 102 can be fixed in stress groove 106, its
Described in stress groove 106 may be located on the outer surface of crankshaft body 101.Stress groove 106 can be given should
Force snesor 102 provides more preferable working environment, is affected less by Crankshaft motion, makes strain gauge
102 result is more accurate.
Under preferable case, as shown in Fig. 2 the stress groove 106 may be located at the outer of crankshaft body 101
At characteristic point on surface, wherein, this feature point may be located at 103 He of trunnion of crankshaft body 101
/ or the axle journal fillet 105 of crank body 104 at.
Thus, by stress groove 106 is located at the characteristic point of crankshaft body 101, bent axle had both been met
Basic demand in design to test value, makes strain gauge 102 less by external interference again, can obtain
To accurately and reliably result.
Fig. 3 is the front view of the local of the crankshaft arrangement that another embodiment of the invention is provided.
As shown in figure 3, under preferable case, in the one side of 107 outer surface of crank arm of the crankshaft body 101
On be fixed with battery 108, the battery 108 is electrically connected with the strain gauge 102.Battery 108 is
Strain gauge 102 is powered.
Battery 108 has various with the fixed form of crank arm 107, for example：Paste, be mechanically fixed.
In the present invention, battery 108 is pasted onto in the one side of 107 outer surface of crank arm using epoxy resin.Epoxy
Resin has excellent adhesive strength to the surface of metal and nonmetallic materials, using extensive, can adapt to
The working environment of this device.Additionally, common test process, System production time is below one hour.
According to the time that system continuously works, the volume of battery 108 is typically in 1-2cm3Work can just be met
Demand.
Fig. 4 is that stress suffered by the test bent axle that a kind of embodiment of the invention is provided is
The structured flowchart of system.As shown in figure 4, the system of the stress suffered by test bent axle can include：Root
According to the crankshaft arrangement 100 that the present invention is provided；And signal processing unit 200, the signal processing unit
200 can include：Strain gauge 102 in signal conversion module 201, with the crankshaft arrangement 100
Electrical connection, for obtaining electric signal according to the resistance of the strain gauge 102；Analog-to-digital conversion module 202,
For the electric signal obtained from signal conversion module 201 is converted into data signal；And memory module
203, come from the data signal of analog-to-digital conversion module 202 for storage.
Thus, it is possible to realize the dynamic test of the stress suffered by bent axle.In the course of work of engine,
Suffered stress when bent axle works can be measured in real time, so as to for bent shaft design, simulation calculation and
Fatigue reliability testing provides accurate stress data value.Additionally, the stress number suffered by measured bent axle
According to value with high precision, error is little the characteristics of.Whole system is simple to manufacture, low cost, installation and debugging side
Just it is, and reliable, for carry out bent axle high intensity, lightweight, low cost etc. design provide it is important
Measuring technology means.
Fig. 5 is the stress suffered by the test bent axle that another embodiment of the invention is provided
The structured flowchart of system.As shown in figure 5, the system can also include battery, such as illustrate in Fig. 3
Battery 108, be fixed in the one side of 107 outer surface of crank arm of the crankshaft body 101, and with
Strain gauge 102 and signal processing unit 200 are electrically connected.Battery 108 can be viscous using epoxy resin
It is attached in the one side of 107 outer surface of crank arm, and the battery uses high temperature impact resistant battery, convenient is whole
System power supply.
Under preferable case, as shown in fig. 6, the signal processing unit 200 can also include signal condition
Module 204, is electrically connected with the signal conversion module 201, for will be from the signal conversion module
201 electric signal is amplified filtering, and will amplify filtered electric signal output to analog-to-digital conversion module
202。
As crankshaft arrangement 100 can be subject to electromagnetic interference in the course of the work, and from the shadow of itself
Ring, Signal-regulated kinase 204 can be amplified and be filtered to the electric signal of the output of signal conversion module 201
Ripple, improves signal to noise ratio, and the rough estimate value of the stress according to suffered by strain gauge 102 and bent axle is selected
Suitable gain resistor value, makes the scope of output voltage signal in 0.1V～2.4V.
Thus, the electric signal from the stress suffered by signal conversion module 201, expression bent axle is passed through
The amplification and filtering of Signal-regulated kinase 204, is met the signal of the requirement of analog-to-digital conversion module 202,
Use for analog-to-digital conversion module 202.
Fig. 7 is the front view of the local of the crankshaft arrangement that another embodiment of the invention is provided.
As shown in fig. 7, under preferable case, the signal processing unit 200 is fixed on the crankshaft body 101
Outer surface on.This mounting means facilitates its connection with crankshaft arrangement 100, and convenient acquisition stress
The output signal of sensor 102.
Under preferable case, the system can also include battery 108, be fixed on the crankshaft body 101
Crank arm 107 outer surface one side on, battery 108 is electrically connected with the signal processing unit 200
Connect, 107 outer surface of crank arm of the fixed position of signal processing unit 200 in crankshaft body 101
It is on another side, relative with the fixed position of the battery 108 along the axial direction of the crankshaft arrangement 100.
By this position relationship between battery 108 and signal processing unit 200, crankshaft arrangement can be made
100 keep balance, it is ensured that the system of the stress suffered by test bent axle in the course of the work, Bu Huishou
To the impact of itself of crankshaft body 101, make the test result of stress suffered by bent axle more accurate.
Under preferable case, the signal conversion module 201 can include electric bridge, with the crankshaft arrangement 100
In strain gauge 102 electrically connect, for obtaining telecommunications according to the resistance of the strain gauge 102
Number.
As the strain gauge that the present invention is used is resistance strain gage, output should be become according to bent axle
The resistance for arriving, so needing for resistance signal to be converted into standard electric signal, such as voltage signal and electric current letter
Number.The present invention uses voltage signal, and electric bridge can use the method for partial pressure in parallel by the change of resistance
The change of voltage is converted into, so as to realize the function of signal conversion module 201, standard electric signal is obtained.
Although here illustrates a kind of embodiment for being converted into electric signal to use by resistance variations, this
Bright to be not limited to this, other meet the conversion regime for requiring and fall within the present invention.
In view of bent axle characteristic point ess-strain the characteristics of and crankshaft arrangement 100 on the little situation in space,
In a preferred embodiment, the electric bridge is direct current wheatstone bridge or direct-flow double bridge.Using direct current
Wheatstone bridge or direct-flow double bridge can meet the needs of signal conversion module 201, and can save installation
Space.
Under preferable case, the resistance in the electric bridge is fixed value resistance.Due to signal processing unit 200
On crankshaft body 101, when bent axle works, signal processing unit 200 can be accelerated therewith
Degree and the impact vibrated, so whole circuit should not all adopt variable resistor, the electric bridge should be by different resistances
The fixed value resistance of value is consisted of connection in series-parallel, to reduce impact of the Crankshaft motion to this test system.
Fig. 8 is the structured flowchart of the memory module that a kind of embodiment of the invention is provided.Such as Fig. 8
Shown, under preferable case, memory module 203 can include：Memory element 2031, for storing bent axle
The data signal of suffered stress；And treatment element 2032, it is connected with analog-to-digital conversion module 202,
For the data signal for receiving is stored in memory element 2031.
After treatment element 2032 receives the data signal of the output of analog-to-digital conversion module 202, stored
In memory element 2031.By answering suffered by the test data of the stress suffered by bent axle, i.e. bent axle
The data signal of power is stored in memory element 2031, in case the follow-up survey to the stress suffered by bent axle
The use of examination data.
In the present invention, treatment element 2032 may, for example, be single-chip microcomputer, and single-chip microcomputer can receive modulus and turn
The data signal of mold changing block 202, and store it in memory element 2031.Although the present invention is provided
A kind of specific embodiment for the treatment of element 2032 it should be appreciated that other can be realized
The treatment element of the function falls within the present invention.
Additionally, it is preferred that in the case of, memory element 2031 is pluggable, for example, is USB storage cores
Piece, SD storage cards etc..Stored using pluggable memory element, it is not only user-friendly,
Test result packing can also be applied, it is quick reliable.
In sum, by technical scheme, it is possible to achieve the dynamic of the stress suffered by bent axle
Test.In the course of work of engine, stress that can be suffered by simple and reliable ground real-time testing bent axle,
Accurate stress data value is provided for bent shaft design, simulation calculation and Fatigue reliability testing.Additionally,
The characteristics of stress data value suffered by measured bent axle has little error, high precision.Whole system system
Make simple, low cost, installation and debugging convenient and reliable, for carry out bent axle high intensity, lightweight,
The design such as low cost is there is provided important measuring technology means.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited
Detail in above-mentioned embodiment, in the range of the technology design of the present invention, can be to the present invention
Technical scheme carry out various simple variants, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment,
In the case of reconcilable, can be combined by any suitable means, in order to avoid unnecessary
Repeat, the present invention is no longer separately illustrated to various possible combinations.
Additionally, can also be combined between a variety of embodiments of the present invention, as long as its
Without prejudice to the thought of the present invention, which should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of crankshaft arrangement, the crankshaft arrangement include：
Crankshaft body；And
Strain gauge, is fixed on the outer surface of crankshaft body, for testing what is be subject to when bent axle works
Stress.
2. device according to claim 1, it is characterised in that the strain gauge is fixed on
At characteristic point on the outer surface of the crankshaft body, wherein the characteristic point is located at the crankshaft body
At the axle journal fillet of trunnion and/or the crank body.
3. device according to claim 1, it is characterised in that the strain gauge is fixed on
In stress groove, wherein the stress groove is located on the outer surface of the crankshaft body.
4. device according to claim 3, it is characterised in that the stress groove is located at the song
At characteristic point on the outer surface of shaft body, wherein the characteristic point is located at the trunnion of the crankshaft body
And/or at the axle journal fillet of the crank body.
5. the system of the stress suffered by a kind of test bent axle, the system includes：
Crankshaft arrangement described in any one of claim 1-4 claim；And signal processing unit,
The signal processing unit includes：
Signal conversion module, is electrically connected with the strain gauge in the crankshaft arrangement, for basis
The resistance of the strain gauge obtains electric signal；
Analog-to-digital conversion module, the electric signal for signal conversion module is obtained are converted into data signal；
And
Memory module, comes from the data signal of analog-to-digital conversion module for storage.
6. system according to claim 5, it is characterised in that the signal processing unit is also wrapped
Signal-regulated kinase is included, is electrically connected with the signal conversion module, for the signal conversion module is turned
Electric signal after changing is amplified filtering, and will amplify filtered electric signal output to the analog-to-digital conversion
Module.
7. the system according to claim 5 or 6, it is characterised in that the signal processing unit
It is fixed on the outer surface of the crankshaft body.
8. system according to claim 7, it is characterised in that the system also includes battery,
It is fixed in the one side of crank arm outer surface of the crankshaft body, the battery and the signal transacting list
Unit's electrical connection, the fixed position of the signal processing unit is in the another of the crankshaft body crank arm outer surface
Simultaneously go up, it is relative with the fixed position of the battery along the axial direction of the crankshaft arrangement.
9. system according to claim 5, it is characterised in that the signal conversion module includes
Electric bridge, is electrically connected with the strain gauge in the crankshaft arrangement, for according to the strain gauge
Resistance obtains electric signal.
10. system according to claim 5, it is characterised in that the memory module includes：
Memory element, for storing the data signal of the stress suffered by bent axle；And,
Treatment element, is connected with the analog-to-digital conversion module, for the data signal for receiving storage is arrived
In the memory element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510640716.2A CN106555810A (en) | 2015-09-30 | 2015-09-30 | The system of the stress suffered by crankshaft arrangement and test bent axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510640716.2A CN106555810A (en) | 2015-09-30 | 2015-09-30 | The system of the stress suffered by crankshaft arrangement and test bent axle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106555810A true CN106555810A (en) | 2017-04-05 |
Family
ID=58417608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510640716.2A Pending CN106555810A (en) | 2015-09-30 | 2015-09-30 | The system of the stress suffered by crankshaft arrangement and test bent axle |
Country Status (1)
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| CN (1) | CN106555810A (en) |
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| EP2478527A1 (en) * | 2009-09-18 | 2012-07-25 | Prysmian S.p.A. | Electric cable with bending sensor and monitoring system and method for detecting bending in at least one electric cable |
| CN101704038A (en) * | 2009-11-27 | 2010-05-12 | 中国北车集团大连机车车辆有限公司 | Filleted corner knocking method for straightening crank shaft |
| CN103063341A (en) * | 2012-12-19 | 2013-04-24 | 三一重工股份有限公司 | Shaft-pin-type force sensor and method for detecting radial force stressed on shaft pin |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180508 Address after: No. 188, Miyun District, Miyun District, Beijing, Beijing Applicant after: Beijing treasure Car Co., Ltd. Address before: 102206, Beijing, Shahe Town, Changping District Road, sand Yang Applicant before: Beiqi Futian Automobile Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170405 |