CN203561497U - Air cylinder sleeve fatigue testing system based on high-frequency fatigue testing machine - Google Patents
Air cylinder sleeve fatigue testing system based on high-frequency fatigue testing machine Download PDFInfo
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- CN203561497U CN203561497U CN201320663547.0U CN201320663547U CN203561497U CN 203561497 U CN203561497 U CN 203561497U CN 201320663547 U CN201320663547 U CN 201320663547U CN 203561497 U CN203561497 U CN 203561497U
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- air cylinder
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Abstract
The utility model discloses an air cylinder sleeve fatigue testing system and based on a high-frequency fatigue testing machine, and relates to an air cylinder sleeve fatigue testing system. The air cylinder sleeve fatigue testing system comprises an air cylinder sleeve assembly system and a real-time monitoring system, wherein the air cylinder sleeve assembly system comprises a testing machine test bench and an air cylinder sleeve fixture device; the air cylinder sleeve fixture device comprises an upper fixture and a lower fixture; the upper fixture and the lower fixture fix a testing assembly body provided with an air cylinder sleeve on the testing machine test bench for fatigue testing; and in a testing process, the testing machine applies a load to the testing assembly body, and the real-time monitoring system monitors vibration frequency and strain of the air cylinder sleeve, so that the service life of the air cylinder sleeve is obtained. The fatigue service life of the air cylinder sleeve under the action of a bolt pretightening force and gas explosion pressure in a working process of an internal-combustion engine is simulated by virtue of the testing method, a testing period is short, and the accuracy of testing data is ensured.
Description
Technical field
The utility model relates to a kind of cylinder jacket fatigue test system, is specially the cylinder jacket fatigue test system based on HF fatigue testing machine.
Background technology
Cylinder jacket is one of important spare part of internal combustion engine, along with internal combustion engine is towards lightweight, high rotating speed, high-power future development, the structure and material of cylinder jacket needs to change, most typical as expansion cylinder, and after expansion cylinder, can its reliability and permanance meet the demands and cause people's extensive concern.The influence factor of cylinder jacket fatigue failure mainly comprises two aspects: 1, thermal load effect: mainly due to cylinder jacket inside and outside wall, have the larger temperature difference, cause that cylinder jacket inside and outside wall is subject to periodically, inhomogeneous thermal stress; 2, mechanical load effect: mainly from installation pretightening force, gaseous-pressure, side thrust of piston etc.
At present, the Fatigue Life Research of research cylinder jacket mainly contains two kinds.The one, mainly adopt the method for finite element simulation calculation, but because various condition is limit, the not high verification experimental verification that needs of the accuracy of its result of calculation.Another method of cylinder jacket examination fatigue lifetime is arranged on engine, carries out long duration test, and this method cycle is long, cost is high, and can only carry out in the later stage of model machine exploitation.Also lack at present the method for cylinder jacket being carried out to quick fatigue life test.
At present existing a lot of mechanical component carry out torture test in HF fatigue testing machine, this has shortened the test period greatly, accelerate the development process of these parts, but because the suffered load of cylinder sleeve is large and mounting condition is special, jig Design difficulty in HF fatigue testing machine is large, at present also not about using HF fatigue testing machine cylinder jacket to be carried out to the report of the method for torture test.In the fatigue failure of cylinder jacket, there is sizable ratio to appear at the step surface of cylinder sleeve longitudinal bracing, it is larger that the inefficacy at this position is affected by the mechanical load of alternation, therefore proposes a kind of assembly fatigue test system and test method of carrying out cylinder cap-cylinder jacket-body based on HF fatigue testing machine.
Utility model content
The purpose of this utility model is just to provide a kind of cylinder jacket fatigue test system based on HF fatigue testing machine, can make cylinder jacket be subject to the fatigue life test of mechanical load effect at the enterprising promoting the circulation of qi cylinder sleeve of HF fatigue testing machine, and can shorten tested cylinder cover and be subject to the time of the fatigue lifetime of mechanical load effect.
To achieve these goals, the technical solution of the utility model is: the cylinder jacket fatigue test system based on HF fatigue testing machine, by cylinder jacket assembly system and real-time monitoring system, formed, cylinder jacket assembly system comprises the gentle cylinder sleeve clamp device of testing machine test board, cylinder jacket grip device comprises fixture and lower clamp, upper fixture comprises a upper joint cover, the center of upper joint cover is connected with the upper end column cap on testing machine test board by studs, the surrounding of upper joint cover is connected with the cylinder head of the test assembly upper end with a cylinder jacket by bolt I, lower clamp comprises a lower joint cover, the center of lower joint cover is connected with the lower end column cap on testing machine test board by bolt II, the both sides of lower joint cover are connected with the bolt of bearing cap of test assembly lower end, testing machine applies test load by upper end column cap to test assembly, described real-time monitoring system comprises the acceleration transducer and the foil gauge that are arranged in cylinder jacket, described acceleration transducer and foil gauge respectively successively with amplifier, data collecting instrument, data collecting card is connected with computing machine, the vibration frequency of computer monitoring cylinder jacket and strain.
Beneficial effect: the fatigue test system of cylinder jacket of the present utility model can make cylinder jacket be arranged in HF fatigue testing machine, and in the method simulation internal combustion engine working process by test, the fatigue lifetime of cylinder jacket under bolt pretightening and gas explosion pressure action condition, shortened the cylinder jacket fatigue life test time.Computer real-time monitoring system can accurately judge the fatigure failure moment of cylinder jacket, has guaranteed the accuracy of test figure.The grip device of cylinder jacket of the present utility model is easily arranged on testing machine cylinder jacket test assembly to carry out torture test, and load is easy to control, the test period is short, and experimentation cost is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model cylinder jacket fatigue test system.
Fig. 2 is the structural representation of the upper joint cover of grip device in cylinder jacket fatigue test system.
In figure, be labeled as: 1, upper fixture, 2, lower clamp, 3, test assembly, 4, upper joint cover, 5, studs, 6, upper end column cap, 7, lower joint cover, 8, bolt II, 9, lower end column cap, 10, bolt I, 11, cylinder head, 12, cylinder jacket, 13, acceleration transducer, 14, amplifier, 15, data collecting instrument, 16, data collecting card, 17, computing machine, 18, testing machine test board, 19, threaded hole, 20, bolt hole, 21, interior connection nut I, 22, upper end column cap external compression nut, 23, interior connection nut II, 24, lower end column cap external compression nut, 25, pad, 26, head gasket, 27, foil gauge.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Cylinder jacket fatigue test system based on HF fatigue testing machine, by cylinder jacket assembly system and real-time monitoring system, formed, cylinder jacket assembly system comprises the gentle cylinder sleeve clamp device of testing machine test board 18, cylinder jacket grip device comprises fixture 1 and lower clamp 2, upper fixture 1 comprises a upper joint cover 4, the center of upper joint cover 4 is connected with the upper end column cap 6 on testing machine test board 18 by studs 5, one end of studs 5 is arranged in the threaded hole 19 at joint cover 4 centers, the other end of studs 5 is connected in the interior connection nut I 21 of upper end column cap 6, the outside of upper end column cap 6 is provided with upper end column cap external compression nut 22, in upper end column cap external compression nut 22, be provided with interior connection nut I 21, the surrounding of upper joint cover 4 is connected with the cylinder head 11 of test assembly 3 upper ends with a cylinder jacket by bolt I 10, on one group of opposite side of upper joint cover 4, be respectively equipped with two bolts, on another group opposite side, be respectively equipped with a bolt, lower clamp 2 comprises a lower joint cover 7, the center of lower joint cover 7 is connected with the lower end column cap 9 on testing machine test board 18 by bolt II 8, bolt II 8 is connected in the interior connection nut II 23 of lower end column cap 9 through the bolt hole at lower joint cover 7 centers, lower end column cap 9 outside be provided with lower end column cap external compression nut 24, in lower end column cap external compression nut 24, be provided with interior connection nut II 23, the both sides of lower joint cover 7 are connected with the bolt of bearing cap of test assembly 3 lower ends, testing machine applies test load by upper end column cap 6 to test assembly 3, described real-time monitoring system comprises the acceleration transducer 13 and the foil gauge 27 that are arranged in cylinder jacket 12, described acceleration transducer 13 and foil gauge 27 respectively successively with amplifier 14, data collecting instrument 15, data collecting card 16 is connected with computing machine 17, computing machine 17 is monitored vibration frequency and the strain of cylinder jacket 12.Acceleration transducer 13 and foil gauge 27 by the instantaneous acceleration of the cylinder jacket recording in process of the test 12 and strain transfer to computing machine 17, computing machine 17 is provided with control program prepared in advance, this program, by monitoring cylinder jacket 12 acceleration and the time dependent curve of strain, realizes the Real-Time Monitoring of computing machine 17 to cylinder jacket 12 vibration frequencies and strain.
Described test assembly 3 is cylinder cap-cylinder jacket to be tested-body combination body, comprise and treat cylinder head, head gasket, cylinder jacket, body etc., the six-cylinder engine carrying take certain vehicle is as example, for the ease of being installed, need do certain processing to it, its process mainly comprises three parts: 1, line cutting assembly, take the front end of internal combustion engine as benchmark, and take cross the second cylinder axis axis perpendicular to the plane of crankshaft direction as line cutting planes, cylinder head, head gasket and internal combustion (IC) engine airframe are carried out to line cutting, and the front end that retains internal combustion engine is test body.2, take cylinder head lower surface as benchmark, its upper surface finish-milling 20mm.3, take the upper surface of crankshaft bearing end cap as benchmark, its underpart milling is flat.
Second step, test assembly top is installed fixing, in the upper end of placement HF fatigue testing machine, connect nut I 21 in upper end column cap external compression nut 22, manually tighten upper end column cap external compression nut 22 on the upper end of HF fatigue testing machine column cap 6, applying certain pretightning force tightens studs 5 and in upper end, connects in nut I 21, six bolts, respectively through six bolts hole 20 of upper joint cover 4 surroundings, are applied to certain pretightning force pad 25, upper joint cover 4 are tightened on studs 5;
The 3rd step, test assembly middle part is installed fixing, slightly rotate test assembly 3, the bolt hole in six bolt alignment test assembly 3 upper end cylinder head 11 through upper joint cover 4 surroundings, place and align head gasket 26 in internal combustion (IC) engine airframe, reduce HF fatigue testing machine upper end column cap 6, until the average load on HF fatigue testing machine monitoring of software stops while being negative value.With pretightning force spanner according to pretightning force apply technique six bolt tightenings of upper joint cover 4 surroundings in cylinder head 11, finally, with special spanner, applying certain pretightning force again tightens HF fatigue testing machine lower end column cap external compression nut 24 and HF fatigue testing machine upper end column cap external compression nut 22 successively, complete the process that is installed of test assembly 3, in the process that is installed, guarantee that screwed hole of centre axis, the test cylinder jacket central axis of assembly 3 inside and the bolt hole axis at lower joint cover 7 centers three lines of upper joint cover 4 overlap.
Claims (1)
1. the cylinder jacket fatigue test system based on HF fatigue testing machine, it is characterized in that: by cylinder jacket assembly system and real-time monitoring system, formed, cylinder jacket assembly system comprises the gentle cylinder sleeve clamp device of testing machine test board (18), cylinder jacket grip device comprises fixture (1) and lower clamp (2), upper fixture (1) comprises a upper joint cover (4), the center of upper joint cover (4) is connected with the upper end column cap (6) on testing machine test board (18) by studs (5), the surrounding of upper joint cover (4) is connected with the cylinder head (11) of test assembly (3) upper end with a cylinder jacket by bolt I (10), lower clamp (2) comprises a lower joint cover (7), the center of lower joint cover (7) is connected with the lower end column cap (9) on testing machine test board (18) by bolt II (8), the both sides of lower joint cover (7) are connected with the bolt of bearing cap of test assembly (3) lower end, testing machine applies test load by upper end column cap (6) to test assembly (3), described real-time monitoring system comprises the acceleration transducer (13) and the foil gauge (27) that are arranged in cylinder jacket (12), described acceleration transducer (13) and foil gauge (27) respectively successively with amplifier (14), data collecting instrument (15), data collecting card (16) is connected with computing machine (17), vibration frequency and the strain of computing machine (17) monitoring cylinder jacket (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320663547.0U CN203561497U (en) | 2013-10-25 | 2013-10-25 | Air cylinder sleeve fatigue testing system based on high-frequency fatigue testing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320663547.0U CN203561497U (en) | 2013-10-25 | 2013-10-25 | Air cylinder sleeve fatigue testing system based on high-frequency fatigue testing machine |
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| CN203561497U true CN203561497U (en) | 2014-04-23 |
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| CN201320663547.0U Expired - Fee Related CN203561497U (en) | 2013-10-25 | 2013-10-25 | Air cylinder sleeve fatigue testing system based on high-frequency fatigue testing machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528808A (en) * | 2013-10-25 | 2014-01-22 | 河南科技大学 | Air cylinder sleeve fatigue testing system and testing method based on high-frequency fatigue testing machine |
| CN109598079A (en) * | 2018-12-12 | 2019-04-09 | 中国北方发动机研究所(天津) | A kind of cylinder head subregion Fatigue Life Prediction method |
| CN112798239A (en) * | 2020-12-21 | 2021-05-14 | 中国北方发动机研究所(天津) | Load applying and testing method for piston heat engine fatigue strength test |
-
2013
- 2013-10-25 CN CN201320663547.0U patent/CN203561497U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528808A (en) * | 2013-10-25 | 2014-01-22 | 河南科技大学 | Air cylinder sleeve fatigue testing system and testing method based on high-frequency fatigue testing machine |
| CN103528808B (en) * | 2013-10-25 | 2016-03-30 | 河南科技大学 | Based on cylinder jacket fatigue test system and the test method of HF fatigue testing machine |
| CN109598079A (en) * | 2018-12-12 | 2019-04-09 | 中国北方发动机研究所(天津) | A kind of cylinder head subregion Fatigue Life Prediction method |
| CN112798239A (en) * | 2020-12-21 | 2021-05-14 | 中国北方发动机研究所(天津) | Load applying and testing method for piston heat engine fatigue strength test |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140423 Termination date: 20161025 |
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| CF01 | Termination of patent right due to non-payment of annual fee |