CN105004528B - A kind of IC engine airframe fatigue simulation loading device - Google Patents
A kind of IC engine airframe fatigue simulation loading device Download PDFInfo
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- CN105004528B CN105004528B CN201510226101.5A CN201510226101A CN105004528B CN 105004528 B CN105004528 B CN 105004528B CN 201510226101 A CN201510226101 A CN 201510226101A CN 105004528 B CN105004528 B CN 105004528B
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Abstract
The invention discloses a kind of IC engine airframe fatigue simulation loading device, the device is included with lower component：Power applies part, for simulated engine explosive force and the explosive force is put on to the main bearing wall of tested body；Virtual crank, in the bent axle endoporus of a main bearing wall of tested body；Connection member, the both ends of connection member connect that power applies the clutch end of part and virtual crank is placed on both ends outside bent axle endoporus respectively, explosive force puts on main bearing wall pedestal by connection member and virtual crank, applies part and tested body for fixing power；The present invention is only by virtual crank in the crankshaft hole of a main bearing wall, when so being tested, the explosive force of simulated engine is applied only on single main bearing wall, when carrying out follow-up test data analysis, influence of the adjacent main bearing wall to fatigue test results need not be considered, make the result of the test that finally obtains closer to real work value, improve the reliability of test result analysis.
Description
Technical field
The present invention relates to IC engine airframe testing fatigue technical field, more particularly to a kind of IC engine airframe fatigue simulation adds
Carry and put.
Background technology
Body is the skeleton of whole internal combustion engine, support and fixed all parts, according to installation parts installation position
The difference put, tested body 2 ' can be divided into cylinder block, crankcase, oil sump etc., and internal combustion engine is provided with tested body 2 '
Cylinder head, toggle, all annexes and accessory drive system install connection all on tested body 2 ', and respectively
Lubrication, the cooling of heated part and the fixation of diesel engine of kind movement parts are also to be realized by tested body 2 '.
It is more complicated that the load condition that body 2 ' is born is tested it can be seen from above description, in the tested institute of body 2 '
In each load born, the explosive force of internal combustion engine directly affects the service life of tested body 2 ' to the pressure of main bearing wall 2 ' 1.
Therefore prior art typically simulates the explosive force of internal combustion engine by fatigue test mode.
Fig. 1 and Fig. 2 are refer to, Fig. 1 is tested the loading of the fatigue simulation of body 2 ' for a kind of typical internal combustion engine in the prior art
The structural representation of device；Fig. 2 is the left view that internal combustion engine shown in Fig. 1 is tested the fatigue simulation loading device of body 2 '.
A kind of typical internal combustion engine of prior art, which is tested the fatigue simulation of body 2 ' loading device, includes frame 1 ', hydraulic cylinder
5 ', cylinder head 7 ', piston 6 ', virtual link 3 ', virtual crank 4 ', hydraulic oil supply unit are simulated, first will be by before being tested
Surveying the both sides of body 2 ' makes to be bolted in frame 1 ' respectively, and the both ends of virtual crank 4 ' are supported in two adjacent main shafts
In the endoporus for holding wall 2 ' 1, the both ends of virtual link connect the medium position of piston 6 ' and virtual crank 4 ' respectively.Hydraulic cylinder 5 ' supplies
Oily device loads sinusoidal pressure, and the sinusoidal pressure is used for the explosive force for simulating internal combustion engine, lower promotion used in the pressure in hydraulic oil
Piston 6 ', virtual link 3 ' compress downwards virtual crank 4 ', are put on by virtual crank 4 ' on main bearing wall 2 ' 1, Jin Erkao
2 ' 1 life-span under internal combustion engine explosive force of core main bearing wall.
Loading simulation examination is carried out to tested body 2 ' being tested the fatigue simulation of body 2 ' loading device using above-mentioned internal combustion engine
When testing, the result of the test finally simulated and actual tested body 2 ' fatigue life in use are deviated, and accuracy compares
It is low.
In addition, hydraulic coupling puts on main bearing wall 2 ' 1, hydraulic coupling through piston 6 ', virtual link, virtual crank 4 ' in experiment
The number of transmission is relatively more, and a small amount of energy loss can all be had each time by transmitting, and this causes result of the test inaccurate.
Also, the cross-sectional area and simulation cylinder head 7 ' of the hydraulic cylinder 5 ', piston 6 ', virtual link 3 ' in testing are
Processed according to the link design used in the parts design dimensional parameters and real system of specific engine, processing tool number
Amount is relatively more, and it is long to expend man-hour.
Therefore, a kind of IC engine airframe fatigue simulation loading device how is provided, the loading device can improve organism fatigue
Test accuracy and test efficiency, it is those skilled in that art's technical problem urgently to be resolved hurrily.
The content of the invention
For the purpose of the present invention to provide a kind of IC engine airframe fatigue simulation loading device, the loading device can improve body
Fatigue test precision and test efficiency.
In order to solve the above technical problems, the present invention provides a kind of IC engine airframe fatigue simulation loading device, including it is following
Part：
Power applies part, for simulated engine explosive force and the explosive force is put on to the base bearing of tested body
Wall；
Virtual crank, in the bent axle endoporus of a main bearing wall of tested body；
Connection member, the both ends of connection member connect the power and apply the clutch end of part and the void respectively
Intend the both ends that bent axle is placed on outside the bent axle endoporus, the explosive force passes through the connection member and the virtual crank
Put on the main bearing wall；
Pedestal, apply part and the tested body for fixing the power.
Preferably, the tested body is installed the end face of cylinder head down and is fixed on the pedestal, the power
The outburst force direction for applying the main bearing wall that part puts on tested body is upward.
Preferably, it be actuator that the power, which applies part, and the pedestal is the base of the actuator, the tested machine
Body is secured by bolts in plane on the base.
Preferably, in addition to connect base, the connect base are provided with first through hole and the second through hole, the tested machine
Plane is respectively arranged with the first screwed hole and the second screwed hole, in addition to first on the body installation end face of cylinder head, the base
Bolt and the second bolt, the threaded portion of first bolt are connected and fixed on first screwed hole through the first through hole
Interior, the threaded portion of second bolt is connected and fixed in second screwed hole through second through hole.
Preferably, first screwed hole is the bolt hole for connecting cylinder head opened up in advance on the tested body.
Preferably, the connection member includes split type upper connector and lower connector, the upper end of the upper connector
The power output shaft that the power applies part is directly connected to, bottom is provided with two linking arms of left and right, the number of the lower connector
To measure as two, the two lower connectors are detachably connected two linking arms respectively, when being tested, the virtual crank quilt
It is placed between the linking arm and the corresponding lower connector.
Preferably, the lower surface of two linking arms offer be engaged with the virtual crank outer surface it is coaxial recessed
Groove, the upper surface of the two lower connectors also offer the groove being engaged with the virtual crank outer surface, when being simulated
During experiment, the virtual crank is placed in the inside grooves of the groove and the corresponding lower connector of the linking arm.
Preferably, after the upper connector and the lower connector assemble, the groove of the upper connector and the lower company
The cross section that the groove of junctor surrounds is circle.
Preferably, the upper connector and the lower connector are bolted, and are provided with the lower connector perpendicular
Straight through hole, the bottom of the linking arm are provided with screwed hole, and the threaded joints of the bolt connect through the through hole
The screwed hole.
The both ends of connection member connect the clutch end and virtual crank dew that power applies part respectively in the present invention
The both ends being placed in outside bent axle endoporus, explosive force put on main bearing wall by connection member and virtual crank.
Compared with the both ends of virtual crank are supported in the endoporus of two main bearing walls in the prior art, the present invention is only by void
Intend bent axle in the crankshaft hole of a main bearing wall, when so being tested, the explosive force of simulated engine is applied only to list
On one main bearing wall, when carrying out follow-up test data analysis, without considering adjacent main bearing wall to fatigue test results
Influence, make the result of the test that finally obtains closer to real work value, improve the reliability of test result analysis.
Brief description of the drawings
Fig. 1 is a kind of structural representation of typical IC engine airframe fatigue simulation loading device in the prior art；
Fig. 2 is the left view of IC engine airframe fatigue simulation loading device shown in Fig. 1；
Fig. 3 is the structural representation of IC engine airframe fatigue simulation loading device in an embodiment of the present invention；
Fig. 4 is the sectional view of IC engine airframe fatigue simulation loading device shown in Fig. 3；
Fig. 5 is B-B sectional views in Fig. 4；
Fig. 6 is C-C sectional views in Fig. 4.
Wherein, one-to-one relationships of the Fig. 1 into Fig. 2 between component names and reference is as follows：
Frame 1 ', tested body 2 ', main bearing wall 2 ' 1, the 1a of crankshaft hole 2 ', virtual link 3 ', virtual crank 4 ', hydraulic cylinder
5 ', piston 6 ', simulation cylinder head 7 '.
Wherein, one-to-one relationships of the Fig. 3 into Fig. 6 between component names and reference is as follows：
Base 1, tested body 2, main bearing wall 21, crankshaft hole 21a, the end face 2b for installing cylinder head, connection member 3, void
Intend bent axle 4, power output shaft 5, actuator frame 6, connect base 7, the first bolt 7a, the second bolt 8a, upper connector 31, the
One linking arm 311, the second linking arm 312, lower connector 32.
Embodiment
For the core of the present invention to provide a kind of IC engine airframe fatigue simulation loading device, the loading device can improve body
Fatigue test precision and test efficiency.
In order that those skilled in the art more fully understands technical scheme, it is below in conjunction with the accompanying drawings and specific real
Applying example, the present invention is described in further detail.
Fig. 3-Fig. 6 is refer to, Fig. 3 is the structure of IC engine airframe fatigue simulation loading device in an embodiment of the present invention
Schematic diagram；Fig. 4 is the sectional view of IC engine airframe fatigue simulation loading device shown in Fig. 3；Fig. 5 is B-B sectional views in Fig. 4；Figure
6 be C-C sectional views in Fig. 4.
The invention provides a kind of IC engine airframe fatigue simulation loading device, including with lower component：Power application part,
Virtual crank 4, connection member 3 and pedestal, wherein, pedestal is used to fix power application part and tested body 2.Power is applied
Made component, for simulated engine explosive force and the explosive force is put on to the main bearing wall 21 of tested body 2；Usually lead to
The explosive force of normal input sine wave pressure simulation engine.Virtual crank 4, located at main bearing wall 21 of tested body 2
In bent axle endoporus.
It can be actuator that power, which applies part, such as electro-hydraulic servo actuator, and it is more accurate to load the analog force of output,
Be advantageous to obtain accurate result of the test, and compared with pushing directly on virtual link using hydraulic cylinder in the prior art, start
The direct output loads of output end of device, influence of the leakage of hydraulic oil to fatigue test accuracy is avoided, and test dress
It is fairly simple to put processing, installation operation.Actuator is installed in actuator frame 6.
The both ends of connection member 3 connect the clutch end and virtual crank 4 that power applies part respectively in the present invention
The both ends being placed on outside bent axle endoporus, explosive force put on main bearing wall 21 by connection member 3 and virtual crank 4.
Compared with the both ends of virtual crank 4 are supported in the endoporus of two main bearing walls 21 in the prior art, the present invention is only
By virtual crank 4 in the crankshaft hole 21a of a main bearing wall 21, when so being tested, the explosive force of simulated engine
It is applied only on single main bearing wall 21, when carrying out follow-up test data analysis, without considering that adjacent main bearing wall 21 is right
The influence of fatigue test results, the result of the test for making finally to obtain improve test result analysis closer to real work value
Reliability.
, can be according to following assembly method when being tested：First, tested body 2 is fixed on pedestal, then will
Virtual crank 4 is installed to inside the crankshaft hole 21a of the main bearing wall 21 of tested body 2, then power is applied into part and virtual song
Axle 4 is connected by connection member 3, is finally started power and is applied the default analog force of part application in the base bearing of tested body 2
The fatigue test of body is carried out on wall 21.
The end face 2b that the installation cylinder head of body 2 is tested in the various embodiments described above is fixed on pedestal, and power applies part
The outburst force direction for putting on the main bearing wall 21 of tested body 2 is upward, that is to say, that power applies part and passes through connection member
3rd, virtual crank 4 compresses the upper inside walls of main bearing wall 21；Meanwhile the end face 2b that cylinder head is installed because being tested body 2 is fixed
In on pedestal, pedestal gives the end face one downward pulling force.
Apply part for power as actuator, pedestal is the base 1 of actuator, tested body 2 is consolidated by bolt
Due to plane on base.The experimental rig structure is compact, and space is smaller, reduces experimentation cost.
IC engine airframe fatigue simulation loading device in the various embodiments described above can also include connect base 7, connect bottom
Seat 7 is provided with first through hole and the second through hole, and plane is respectively arranged with the end face 2b of the tested installation of body 2 cylinder head, base
First screwed hole and the second screwed hole, in addition to the first bolt 7a and the second bolt 8a, the first bolt 7a threaded portion are through the
One through hole is connected and fixed in the first screwed hole, and the second bolt 8a threaded portion is connected and fixed on the second screw thread through the second through hole
In hole.
Wherein, the first screwed hole can be the bolt hole for connecting cylinder head opened up in advance on tested body 2.
The experimental rig directly utilize machined for fixing on tested body 2 when tested body 2 is fixed
The screwed hole of cylinder head, tested body 2 is fixed in connect base 7, then again makes connect base 7 to be bolted to work
On the base 1 of dynamic device, so without separately processing fixed connection structure on tested body 2, without destroying the structure of tested body 2
Simulated test can be carried out.
Connection member 3 in the various embodiments described above can have various structures, as long as the accurate of actuator analog force can be realized
Output, a kind of specific embodiment of connection member 3 is following present, is seen description below in detail.
In a kind of specific embodiment, connection member 3 can include split type upper connector 31 and lower connector 32,
The upper end of upper connector 31 is directly connected to the power output shaft 5 that the power applies part, upper end dimensional parameters typically with
The connecting rod of institute's simulated engine connection is identical, and bottom is provided with two linking arms of left and right, is defined as：First linking arm 311 and second
Linking arm 312, the quantity of lower connector 32 are two, and twice connector 32 is detachably connected two linking arms respectively, when being tried
When testing, the virtual crank 4 is placed between the linking arm and the corresponding lower connector 32.
The output power shaft of actuator directly can connect virtual crank 4 by connection member 3 in the present embodiment, with showing
There is technology to compare, greatly reduce the quantity of intermediate transfer part, it is possible to reduce the pilot process of power transmission, improve experiment essence
Degree, and split-type structural is easy to test the assembling of each part, is advantageous to improve test efficiency.
Specifically, the lower surface of two linking arms offers the co-axial grooves being engaged with the outer surface of virtual crank 4, connects under two
The upper surface of junctor 32 also offers the groove being engaged with the outer surface of virtual crank 4, when carrying out simulated test, virtual crank
4 are placed in the inside grooves of the groove and corresponding lower connector 32 of linking arm.Further, 32 groups of upper connector 31 and lower connector
After dress, the cross section that the groove of the groove of upper connector 31 and lower connector 32 surrounds is circle, and so upper connector 31 is with
After connector 32 assembles, the space wall that both surround contacts with the outer surface fitting completely of bent axle, can reduce simulation explosive force
Loss in transmittance process, improve the accuracy of simulated test.
In addition, upper connector 31 and lower connector 32 can be bolted, it is vertical to be provided with lower connector 32
Through hole, the bottom of linking arm are provided with screwed hole, and the threaded joints of bolt pass through through hole connection screw thread hole.Specific bolt
It is not described here in detail for quantity and set location, using the slippages and reliable delivery of reduction simulation explosive force as design standard.
Certainly, the structure of connection member 3 is not limited to hereinbefore description, as long as the reliable delivery of analog force can be realized i.e.
Can.
Above to a kind of IC engine airframe fatigue simulation loading device provided by the present invention, it is described in detail.This
Apply specific case in text to be set forth the principle and embodiment of the present invention, the explanation of above example is only intended to
Help to understand method and its core concept of the invention.It should be pointed out that for those skilled in the art,
Without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls
Enter in the protection domain of the claims in the present invention.
Claims (8)
1. a kind of IC engine airframe fatigue simulation loading device, it is characterised in that including with lower component：
Power applies part, for simulated engine explosive force and the explosive force is put on to the base bearing of tested body (2)
Wall (21)；
Virtual crank (4), in the bent axle endoporus of a main bearing wall (21) of tested body (2)；
Connection member (3), the both ends of connection member (3) connect the power and apply the clutch end of part and described respectively
Virtual crank (4) is placed on the both ends outside the bent axle endoporus, and the explosive force passes through the connection member (3) and described
Virtual crank (4) puts on the main bearing wall (21)；
Pedestal, apply part and the tested body (2) for fixing the power；
The connection member (3) includes split type upper connector (31) and lower connector (32), the upper connector (31) it is upper
End is directly connected to the power output shaft that the power applies part, and bottom is provided with two linking arms of left and right, the lower connector
(32) quantity is two, and the two lower connectors (32) are detachably connected two linking arms, when being tested, institute respectively
Virtual crank (4) is stated to be placed between the linking arm and the corresponding lower connector (32).
2. IC engine airframe fatigue simulation loading device as claimed in claim 1, it is characterised in that the tested body (2)
The end face (2b) of cylinder head is installed down and is fixed on the pedestal, the power applies part and puts on tested body
(2) the outburst force direction of main bearing wall (21) is upward.
3. IC engine airframe fatigue simulation loading device as claimed in claim 2, it is characterised in that the power applies part
For actuator, the pedestal is the base (1) of the actuator, and the tested body (2) is secured by bolts in the base
(1) plane on.
4. IC engine airframe fatigue simulation loading device as claimed in claim 2, it is characterised in that also including connect base
(7), the connect base (7) is provided with first through hole and the second through hole, the end face of tested body (2) the installation cylinder head
Plane is respectively arranged with the first screwed hole and the second screwed hole, in addition to the first bolt (7a) and second on (2b), the pedestal
Bolt (8a), the threaded portion of first bolt (7a) are connected and fixed in first screwed hole through the first through hole,
The threaded portion of second bolt (8a) is connected and fixed in second screwed hole through second through hole.
5. IC engine airframe fatigue simulation loading device as claimed in claim 4, it is characterised in that first screwed hole is
What is opened up in advance on the tested body (2) is used to connect the bolt hole of cylinder head.
6. the IC engine airframe fatigue simulation loading device as described in any one of claim 1 to 5, it is characterised in that described in two
The lower surface of linking arm offers the co-axial grooves being engaged with the virtual crank (4) outer surface, the two lower connectors
(32) upper surface also offers the groove being engaged with the virtual crank (4) outer surface, described when carrying out simulated test
Virtual crank (4) is placed in the groove and the inside grooves of the corresponding lower connector (32) of the linking arm.
7. IC engine airframe fatigue simulation loading device as claimed in claim 6, it is characterised in that the upper connector (31)
After lower connector (32) assembling, what the groove of the upper connector (31) and the groove of the lower connector (32) surrounded
Cross section is circle.
8. the IC engine airframe fatigue simulation loading device as described in any one of claim 1 to 5, it is characterised in that on described
Connector (31) and the lower connector (32) are bolted, and vertical through hole is provided with the lower connector (32),
The bottom of the linking arm is provided with screwed hole, and the threaded joints of the bolt connect the screw thread through the through hole
Hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510226101.5A CN105004528B (en) | 2015-05-06 | 2015-05-06 | A kind of IC engine airframe fatigue simulation loading device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510226101.5A CN105004528B (en) | 2015-05-06 | 2015-05-06 | A kind of IC engine airframe fatigue simulation loading device |
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| Publication Number | Publication Date |
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| CN105004528A CN105004528A (en) | 2015-10-28 |
| CN105004528B true CN105004528B (en) | 2017-12-19 |
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| CN201510226101.5A Active CN105004528B (en) | 2015-05-06 | 2015-05-06 | A kind of IC engine airframe fatigue simulation loading device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114166488B (en) * | 2021-11-23 | 2023-05-23 | 中国直升机设计研究所 | Fatigue test loading device for main landing gear of helicopter |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009045396A1 (en) * | 2009-10-06 | 2011-04-07 | Fev Motorentechnik Gmbh | Test-stand for testing fatigue strength e.g. transient fatigue, of cylindrical body of motor vehicle, has pressure generating unit and fixture including piezo-actuator and heating element, where load is applied on test objects |
| CN102053039B (en) * | 2010-12-07 | 2012-08-22 | 浙江大学 | Engine body hydraulic fatigue test system |
| CN102778398B (en) * | 2012-07-23 | 2014-02-26 | 中国兵器工业集团第七〇研究所 | Electro-hydraulic servo system for fatigue test for body of engine with high explosive pressure |
| CN103162965B (en) * | 2013-03-22 | 2016-01-13 | 潍柴动力股份有限公司 | A kind of engine body fatigue test device of diesel engine |
| CN104568409A (en) * | 2014-12-31 | 2015-04-29 | 中国北方发动机研究所(天津) | Engine body inversion single-partition-plate fatigue test device |
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