CN103257041B - Cylinder head gasket mechanical fatigue simulation test device and method - Google Patents
Cylinder head gasket mechanical fatigue simulation test device and method Download PDFInfo
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- CN103257041B CN103257041B CN201310172302.2A CN201310172302A CN103257041B CN 103257041 B CN103257041 B CN 103257041B CN 201310172302 A CN201310172302 A CN 201310172302A CN 103257041 B CN103257041 B CN 103257041B
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- 238000012360 testing method Methods 0.000 title claims abstract description 31
- 238000004088 simulation Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000002159 abnormal effect Effects 0.000 claims abstract description 4
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 206010020852 Hypertonia Diseases 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 description 8
- 238000004458 analytical method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Testing Of Engines (AREA)
Abstract
The invention discloses a cylinder head gasket mechanical fatigue simulation test device and method. A worm wheel lead-screw lifting system regulates protruded heights of a cylinder sleeve. The cylinder sleeve is in clearance fit with a cylinder, and therefore the cylinder sleeve can move vertically. A hole is formed in a cylinder cover, hydraulic pressure is led in through the interior of the cylinder cover, the intensity of the hydraulic pressure can be controlled through regulation of an overflow valve and a flow controller in a hydraulic system pressurizing a cylinder head gasket, backflow of the hydraulic pressure is prevented through a one-way valve, and pressure of the cylinder head gasket is kept. The device is connected with a computer, data are directly displayed on the computer, and the data are convenient to record. The fatigue failure cycle of the cylinder head gasket is finished until indication of a pressure gauge is abnormal. By means of regulation of the protruded heights of the cylinder sleeve, influences, caused by different protruded heights, on experimental results are tested. Only the simple test device is needed, and experimental requirements are met by means of simulation of the influences, caused by the protruded heights of the working cylinder sleeve of an engine, on the cylinder head gasket.
Description
Technical field
The invention belongs to engine component performance test technical field, be specifically related to a kind of cylinder head gasket mechanical fatigue simulation test device and method.
Background technology
Head gasket is between cylinder head and cylinder block, and its effect is the microscopic void filled up between cylinder block and head, ensures that there is good sealing at faying face place, and then ensures the sealing of firing chamber, prevent cylinder leakage tester and water jacket from leaking.Along with the development of engine technology, cylinder internal gas pressure constantly raises mechanical load constantly to be increased, and day by day harsh to the requirement of head gasket, the reliability of head gasket is more and more important, and its quality directly affects the normal operation of engine.Therefore, need to carry out analysis of experiments to cylinder head gasket mechanical fatigue.
Fatigure failure is the most important failure mode of physical construction, but also fail so far to set up clear and definite mathematical model, only have to be undertaken testing by fatigue tester and just can obtain reliable data, also there is no special mechanical fatigue worktable for head gasket at present, so design this experiment table to carry out testing fatigue to head gasket, obtain the difference of difference cylinder cover height of projection by experiment to the impact of cylinder head gasket mechanical fatigue.
Summary of the invention
The object of the invention is the deficiency overcoming above-mentioned technology, the test unit of a kind of (cost is low, efficiency is high, comprehensively intuitively) is provided, the specifically device and method of cylinder head gasket mechanical fatigue simulation, can the difference of Simulated gas cylinder sleeve height of projection on the impact of fatigue behaviour, draw reliable fatigue behaviour data.
Cylinder head gasket mechanical fatigue simulation test device comprises worm wheel screw rod lifting machine structure, hydraulic system and cylinder.
The end cap that described worm wheel screw rod lifting machine structure comprises the worm gear be arranged in cylinder casing, worm screw, taper roll bearing, leading screw and matches with cylinder casing; Worm gear is connected with cylinder casing by taper roll bearing, is provided with screw thread and is connected with leading screw in worm gear, and worm screw is by driving stepper motor, and worm screw passes to worm gear force and moment, is finally transformed into moving up and down of leading screw.
Described cylinder comprises cylinder head, cylinder wall and head gasket; In described cylinder wall, be provided with cylinder jacket, cylinder wall and cylinder jacket adopt clearance fit, are connected between cylinder jacket with head gasket by upwarding pressure of producing of worm wheel screw rod lifting machine structure.
Described hydraulic system comprises hydraulic cylinder, surplus valve, solenoid directional control valve, tensimeter, retaining valve, flow controller and hydraulic pump; Hydraulic cylinder and cylinder head are bolted, and centre is provided with O-ring seal and prevents hydraulic leak; Hydraulic pump provides power, the pressure in hydraulic control cylinder is carried out by surplus valve and flow controller, the pressure produced when making it Simulated gas cylinder working, the output of flow controller is connected to retaining valve, the pipeline of retaining valve to hydraulic cylinder is provided with pressure gauge, and pressure gauge display acts on the pressure of head gasket; Surplus valve protection hydraulic system, prevents the hypertonia in hydraulic cylinder; Pressure in the energising of solenoid directional control valve, power-off hydraulic control cylinder.
Cylinder head gasket mechanical fatigue simulation experiment method, specifically:
First withstand cylinder jacket by worm wheel screw rod lifting machine structure thus give head gasket pretightning force, during simulated engine work, cylinder jacket is to the pressure of head gasket, use bolt tightening cylinder head, hydraulic pressure is passed into again from the hole that cylinder head gets out, opened by solenoid directional control valve circulation, close hydraulic control pressurization and bleed off pressure process, thus the process of simulation internal combustion engine, carried out the size of adjust flux by flow controller, the air pressure size of reality when making it more to approach engine operation; Then connect computer and solenoid directional control valve, by detecting the number of times of solenoid directional control valve Voltage On state, show the number of times of hydraulic pressure to head gasket circulation pressurization on computers, until manometric instruction is abnormal, head gasket fatigue failure circulation terminates; Height of projection finally by worm wheel screw rod lifting machine structure adjusting cylinders cover repeats above test and tests the impact of different height of projection on test findings.
Compared with prior art, the invention has the beneficial effects as follows:
1, cylinder head gasket mechanical fatigue simulation test device provided by the present invention and method, by simulated engine working environment, completes cylinder head gasket mechanical fatigue simulation test.Test and control pressurization by solenoid directional control valve and bleed off pressure.Reach testing requirements, the confidence level of warranty test.
2, cylinder head gasket mechanical fatigue simulation test device provided by the present invention and method, adopt electronic signal experimental facilities, test accuracy is high, ensure that the precision of test.
3, cylinder head gasket mechanical fatigue simulation test device provided by the present invention and method, by collection signal, conversion also preserves data by computer, simple to operate, continuity strong, improves test efficiency.
4, cylinder head gasket mechanical fatigue simulation test device provided by the present invention and method, do not need complicated engine experimental table, structure is simple, experimental cost is low, and applicability is wide, facilitates Long-Time Service, be widely used in each auto parts and components manufacturing plant, be conducive to industry development.
Accompanying drawing explanation
Fig. 1 is mechanical part structural representation of the present invention.
Fig. 2 is detecting portion schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
As depicted in figs. 1 and 2, apparatus of the present invention comprise solenoid directional control valve 2, tensimeter 3, retaining valve 4, flow controller 5, filtrator 9, hydraulic pump 6, computer 21, worm gear 15, worm screw 16, leading screw 18, taper roll bearing 17.
Screw of Worm Gear jacking system is made up of worm gear 15, worm screw 16, taper roll bearing 17, leading screw 18, end cap 14.In cylinder casing 13, turbine and worm is installed, worm gear is connected with casing by taper roll bearing, be provided with screw thread in worm gear to be connected with leading screw, to be connected with stepper motor by worm screw and force and moment passed to worm gear, finally be transformed into moving up and down of leading screw, wherein Worm Wheel System system has auto-lock function.Cylinder wall 12 and cylinder jacket adopt clearance fit, facilitate institutional adjustment tested cylinder to overlap the different data of height of projection.Be connected by upwarding pressure of producing of Screw of Worm Gear jacking system between cylinder jacket with head gasket 11.Cylinder wall 12, with bolts between cylinder head 10 and head gasket 11.Hydraulic cylinder 8 and cylinder head are bolted centre has O-ring seal to prevent hydraulic leak.Hydraulic system provides power by hydraulic pump; the pressure in hydraulic control cylinder is carried out by the first surplus valve 1 and flow controller 5; the pressure produced when making it Simulated gas cylinder working; the second surplus valve 7 in device can also hypertonia in protection system; the safety of protection system, carrys out the pressure in hydraulic control cylinder by the energising of solenoid directional control valve, power-off, tensimeter display acts on the pressure of head gasket; when head gasket fatigure failure display data exception, off-test.By image data and data conversion, the data of experiment are passed on computer, for record and analysis data.
In above, retaining valve 4 prevents the pressure in hydraulic return maintenance cylinder, by judge manometric index whether extremely experiment whether complete, head gasket tired broken ring is described when an exception occurs, and experiment terminates, and is carried out the pressure of control cylinder by the situation controlling solenoid directional control valve power on/off.
Detecting the number of times of solenoid directional control valve energising as passed through in Fig. 2, through A/D converter 19, being converted into digital signal, through I/O interface 20 signal access computer 21, thus record analysis data.
Cylinder head gasket mechanical fatigue simulation experiment method comprises the following steps:
First withstand cylinder jacket by Screw of Worm Gear jacking system baffle plate thus give head gasket pretightning force, during simulated engine work, cylinder jacket is to the pressure of head gasket, use bolt tightening cylinder head, hydraulic pressure is passed in the hole got out from cylinder head, opened by solenoid directional control valve circulation, close hydraulic control pressurization and bleed off pressure process, simulate the process of internal combustion engine, the size of adjust flux can be carried out by flow controller, the air pressure size of reality when making it more to approach engine operation.Connect computer and experiment table, by detecting the number of times of solenoid directional control valve Voltage On state, show the number of times of hydraulic pressure to head gasket circulation pressurization on computers, until manometric instruction is abnormal, head gasket fatigue failure circulation terminates.Height of projection finally by Screw of Worm Gear jacking system adjusting cylinders cover repeats above experiment and tests the impact of different height of projection on experimental result.
In the present invention, Screw of Worm Gear jacking system has that structure is simple, reliable, precision is high, be convenient to the height that adjusting cylinders cover is protruding, and Screw of Worm Gear jacking system has auto-lock function, facilitates the position of fixed air cylinder sleeve.Adopt clearance fit between cylinder jacket and cylinder, cylinder jacket can be moved up and down.In cylinder head, punching allows hydraulic pressure by passing in cylinder head, regulation relief valve and flow controller can carry out the pressure of hydraulic control, prevented the backflow of hydraulic pressure, keep the pressure to head gasket by retaining valve in the hydraulic system of pressurizeing to head gasket.Then by being connected with computer, data directly being shown on computers, conveniently records data.Finally by the height changing cylinder jacket projection, test the impact of different height of projection on experimental result.
Claims (2)
1. cylinder head gasket mechanical fatigue simulation test device, comprises worm wheel screw rod lifting machine structure, hydraulic system and cylinder, it is characterized in that:
The end cap that described worm wheel screw rod lifting machine structure comprises the worm gear be arranged in cylinder casing, worm screw, taper roll bearing, leading screw and matches with cylinder casing; Worm gear is connected with cylinder casing by taper roll bearing, is provided with screw thread and is connected with leading screw in worm gear, and worm screw is by driving stepper motor, and worm screw passes to worm gear force and moment, is finally transformed into moving up and down of leading screw;
Described cylinder comprises cylinder head, cylinder wall and head gasket; In described cylinder wall, be provided with cylinder jacket, cylinder wall and cylinder jacket adopt clearance fit, are connected between cylinder jacket with head gasket by upwarding pressure of producing of worm wheel screw rod lifting machine structure;
Described hydraulic system comprises hydraulic cylinder, surplus valve, solenoid directional control valve, tensimeter, retaining valve, flow controller and hydraulic pump; Hydraulic cylinder and cylinder head are bolted, and centre is provided with O-ring seal and prevents hydraulic leak; Hydraulic pump provides power, the pressure in hydraulic control cylinder is carried out by surplus valve and flow controller, the pressure produced when making it Simulated gas cylinder working, the output of flow controller is connected to retaining valve, the pipeline of retaining valve to hydraulic cylinder is provided with pressure gauge, and pressure gauge display acts on the pressure of head gasket; Surplus valve protection hydraulic system, prevents the hypertonia in hydraulic cylinder; Pressure in the energising of solenoid directional control valve, power-off hydraulic control cylinder.
2. use cylinder head gasket mechanical fatigue simulation test device described in claim 1 to carry out cylinder head gasket mechanical fatigue simulation experiment method, its feature in the method specifically:
First withstand cylinder jacket by worm wheel screw rod lifting machine structure thus give head gasket pretightning force, during simulation internal combustion engine, cylinder jacket is to the pressure of head gasket, use bolt tightening cylinder head, hydraulic pressure is passed into again from the hole that cylinder head gets out, opened by solenoid directional control valve circulation, close hydraulic control pressurization and bleed off pressure process, thus the process of simulation internal combustion engine, carried out the size of adjust flux by flow controller, the air pressure size of reality when making it more to approach internal combustion engine; Then connect computer and solenoid directional control valve, by detecting the number of times of solenoid directional control valve Voltage On state, show the number of times of hydraulic pressure to head gasket circulation pressurization on computers, until manometric instruction is abnormal, head gasket fatigue failure circulation terminates; Height of projection finally by worm wheel screw rod lifting machine structure adjusting cylinders cover repeats above test and tests the impact of different height of projection on test findings.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310172302.2A CN103257041B (en) | 2013-05-10 | 2013-05-10 | Cylinder head gasket mechanical fatigue simulation test device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310172302.2A CN103257041B (en) | 2013-05-10 | 2013-05-10 | Cylinder head gasket mechanical fatigue simulation test device and method |
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| CN103257041A CN103257041A (en) | 2013-08-21 |
| CN103257041B true CN103257041B (en) | 2015-06-17 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103698117B (en) * | 2013-12-17 | 2017-02-01 | 中国北方发动机研究所(天津) | High-cycle mechanical fatigue test device and test method for engine cylinder cover |
| CN105865799A (en) * | 2016-06-21 | 2016-08-17 | 长春鑫利密封制品有限公司 | Electrical measurement control system |
| CN106153315A (en) * | 2016-06-21 | 2016-11-23 | 长春鑫利密封制品有限公司 | A kind of engine gasket pulse test bench |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5054314A (en) * | 1989-08-29 | 1991-10-08 | Montupet | Mechanical fatigue test bench for engine cylinder heads |
| CN201255692Y (en) * | 2008-09-18 | 2009-06-10 | 河南省中原内配股份有限公司 | Cylinder liner fatigue test mechanism |
| CN201335766Y (en) * | 2008-12-16 | 2009-10-28 | 中国矿业大学 | Frictional wear testing machine for cylinder sleeve and piston ring |
| CN201575956U (en) * | 2009-09-25 | 2010-09-08 | 中国第一汽车集团公司 | Fatigue testing machine of engine cylinder body |
| CN102866007A (en) * | 2012-09-20 | 2013-01-09 | 潍柴动力股份有限公司 | Cylinder head fatigue test device and method |
| CN203216715U (en) * | 2013-05-10 | 2013-09-25 | 杭州电子科技大学 | Cylinder head gasket mechanical fatigue simulation test device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3340085B2 (en) * | 1999-04-13 | 2002-10-28 | 日本たばこ産業株式会社 | Material testing machine |
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2013
- 2013-05-10 CN CN201310172302.2A patent/CN103257041B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5054314A (en) * | 1989-08-29 | 1991-10-08 | Montupet | Mechanical fatigue test bench for engine cylinder heads |
| CN201255692Y (en) * | 2008-09-18 | 2009-06-10 | 河南省中原内配股份有限公司 | Cylinder liner fatigue test mechanism |
| CN201335766Y (en) * | 2008-12-16 | 2009-10-28 | 中国矿业大学 | Frictional wear testing machine for cylinder sleeve and piston ring |
| CN201575956U (en) * | 2009-09-25 | 2010-09-08 | 中国第一汽车集团公司 | Fatigue testing machine of engine cylinder body |
| CN102866007A (en) * | 2012-09-20 | 2013-01-09 | 潍柴动力股份有限公司 | Cylinder head fatigue test device and method |
| CN203216715U (en) * | 2013-05-10 | 2013-09-25 | 杭州电子科技大学 | Cylinder head gasket mechanical fatigue simulation test device |
Non-Patent Citations (1)
| Title |
|---|
| 气缸疲劳破坏预测试验平台的设计与实现;周泰等;《液压与气动》;20130115(第1期);第48-50页 * |
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