CN103257041A - 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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- CN103257041A CN103257041A CN2013101723022A CN201310172302A CN103257041A CN 103257041 A CN103257041 A CN 103257041A CN 2013101723022 A CN2013101723022 A CN 2013101723022A CN 201310172302 A CN201310172302 A CN 201310172302A CN 103257041 A CN103257041 A CN 103257041A
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- 238000012360 testing method Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004088 simulation Methods 0.000 title claims abstract description 18
- 230000003028 elevating effect Effects 0.000 claims description 10
- 206010020852 Hypertonia Diseases 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 238000004458 analytical method 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
- 238000006243 chemical reaction Methods 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
- 238000001514 detection method 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
- 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
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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 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 of filling up between the cylinder block and head, guarantees that there is good sealing property at the faying face place, and then guarantees the sealing of firing chamber, prevents that cylinder leakage tester and water jacket from leaking.Along with the development of engine technology, the cylinder internal gas pressure mechanical load that constantly raises constantly increases, and harsh day by day to the requirement of head gasket, the reliability of head gasket is more and more important, and its quality directly influences the normal operation of engine.Therefore, need carry out analysis of experiments to the head gasket mechanical fatigue.
Fatigure failure is the most important failure mode of physical construction, but also fail to set up the explicit mathematical model so far, have only to test just by fatigue tester and can obtain reliable data, at present also there is not special mechanical fatigue worktable at head gasket, so design this experiment table head gasket is carried out testing fatigue, obtain the difference of difference cylinder cover height of projection by experiment to the influence of head gasket mechanical fatigue.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned technology, the test unit of a kind of (cost is low, efficient is high, comprehensively intuitively) is provided, it specifically is the device and method of head gasket mechanical fatigue simulation, can simulate the difference of cylinder jacket height of projection to the influence of fatigue behaviour, draw reliable fatigue behaviour data.
Head gasket mechanical fatigue simulation test device comprises Screw of Worm Gear elevating mechanism, hydraulic system and cylinder.
Described Screw of Worm Gear elevating mechanism comprises worm gear, worm screw, taper roll bearing, the leading screw that is installed in the cylinder casing and the end cap that matches with the cylinder casing; Worm gear links to each other with the cylinder casing by taper roll bearing, is provided with screw thread in the worm gear and links to each other with leading screw, and worm screw is driven by stepper motor, and worm screw passes to worm gear to power and moment, is transformed into moving up and down of leading screw at last.
Described cylinder comprises cylinder head, cylinder wall and head gasket; Be provided with cylinder jacket in described cylinder wall, cylinder wall and cylinder jacket adopt clearance fit, are connected by upwarding pressure of producing of Screw of Worm Gear elevating mechanism between cylinder jacket and the head gasket.
Described hydraulic system comprises hydraulic cylinder, surplus valve, solenoid directional control valve, tensimeter, retaining valve, flow controller and hydraulic pump; Hydraulic cylinder is connected by bolt with cylinder head, and the centre is provided with O-ring seal and prevents hydraulic leak; Hydraulic pump provides power, control pressure in the hydraulic cylinder by surplus valve and flow controller, the pressure that produces when making it to simulate cylinder operation, the output of flow controller is connected to retaining valve, be provided with pressure gauge at retaining valve to the pipeline of hydraulic cylinder, pressure gauge shows the pressure that acts on head gasket; Surplus valve protection hydraulic system prevents the hypertonia in the hydraulic cylinder; Pressure in the energising of solenoid directional control valve, the outage control hydraulic cylinder.
Head gasket mechanical fatigue simulation experiment method, specifically:
Thereby at first withstand cylinder jacket by the Screw of Worm Gear elevating mechanism and give pretightning force of head gasket, cylinder jacket is to the pressure of head gasket during simulated engine work, tighten cylinder head with bolt, from the hole that cylinder head gets out, feed hydraulic pressure again, open, close to control hydraulic pressurization and put the pressure process by the solenoid directional control valve circulation, thereby the process of simulation internal combustion engine, by the size that flow controller is regulated flow, the air pressure size of reality when making it to approach engine operation more; Connect computer and solenoid directional control valve then, by detecting the number of times that the electromagnetic switch threshold voltage is connected, show hydraulic pressure on computers to the number of times of head gasket circulation pressurization, unusual up to manometric indication, head gasket fatigue failure circulation finishes; Test different heights of projection to the influence of test findings by the above test of height of projection repetition of Screw of Worm Gear elevating mechanism adjusting cylinder jacket at last.
Compared with prior art, the invention has the beneficial effects as follows:
1, head gasket mechanical fatigue simulation test device provided by the present invention and method by the simulated engine working environment, are finished head gasket mechanical fatigue simulation test.Test is by solenoid directional control valve control pressurization and put pressure.Reach testing requirements, the confidence level of warranty test.
2, head gasket mechanical fatigue simulation test device provided by the present invention and method adopt the electronic signal experimental facilities, and the test accuracy height has guaranteed the precision of testing.
3, head gasket mechanical fatigue simulation test device provided by the present invention and method, by gathering signal, conversion is also preserved data by computer, and is simple to operate, continuity is strong, has improved test efficiency.
4, head gasket mechanical fatigue simulation test device provided by the present invention and method do not need complicated engine experimental table, and be simple in structure, experimental cost is low, and applicability is wide, convenient use for a long time, be widely used in each auto parts and components manufacturing plant, be conducive to industry development.
Description of drawings
Fig. 1 is mechanical part structural representation of the present invention.
Fig. 2 is test section of the present invention synoptic diagram.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
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.
The 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 the cylinder casing 13 turbine and worm is installed, worm gear links to each other with casing by taper roll bearing, being provided with screw thread in the worm gear links to each other with leading screw, link to each other with stepper motor by worm screw power and moment are passed to worm gear, be transformed into moving up and down of leading screw at last, wherein the worm and gear kinematic train has auto-lock function.Cylinder wall 12 adopts clearance fit with cylinder jacket, makes things convenient for the different data of institutional adjustment tested cylinder cover height of projection.Be connected by upwarding pressure of producing of Screw of Worm Gear jacking system between cylinder jacket and the head gasket 11.Adopt bolt to connect between cylinder wall 12, cylinder head 10 and the head gasket 11.Hydraulic cylinder 8 is connected the centre with cylinder head by bolt has O-ring seal to prevent hydraulic leak.Hydraulic system provides power by hydraulic pump; control pressure in the hydraulic cylinder by first surplus valve 1 and flow controller 5; the pressure that produces when making it to simulate cylinder operation; the hypertonia of second surplus valve 7 in the device in can also protection system; the safety of protection system is controlled the pressure in the hydraulic cylinder by energising, the outage of solenoid directional control valve, and tensimeter shows the pressure that acts on head gasket; when the head gasket fatigure failure shows data exception, off-test.By image data and data-switching the data of experiment are passed on the computer, be used for record and analyze data.
Middle retaining valve 4 prevents that the hydraulic pressure backflow from keeping the pressure in the cylinder in the above, by judge manometric index whether unusually experiment whether finish, head gasket tired broken ring is described when generation is unusual, tests end, come the pressure of control cylinder by the situation of control solenoid directional control valve power on/off.
Number of times as switching on by the detection solenoid directional control valve among Fig. 2 through A/D converter 19, is converted into digital signal, through I/O interface 20 signal is inserted computer 21, thus the record analysis data.
Head gasket mechanical fatigue simulation experiment method may further comprise the steps:
Thereby at first withstand cylinder jacket by Screw of Worm Gear jacking system baffle plate and give pretightning force of head gasket, cylinder jacket is to the pressure of head gasket during simulated engine work, tighten cylinder head with bolt, the hole that gets out from cylinder head, feed hydraulic pressure, open, close to control hydraulic pressurization and put the pressure process by the solenoid directional control valve circulation, simulate the process of internal combustion engine, can regulate the size of flow by flow controller, the air pressure size of reality when making it to approach engine operation more.Connect computer and experiment table, by detecting the number of times that the electromagnetic switch threshold voltage is connected, show hydraulic pressure on computers to the number of times of head gasket circulation pressurization, unusual up to manometric indication, head gasket fatigue failure circulation finishes.Test different heights of projection to the influence of experimental result by the above experiment of height of projection repetition of Screw of Worm Gear jacking system adjusting cylinder jacket at last.
Among the present invention the Screw of Worm Gear jacking system have simple in structure, reliable, precision is high, is convenient to regulate the height of cylinder jacket projection, and the Screw of Worm Gear jacking system has auto-lock function, makes things convenient for the position of fixed air cylinder sleeve.Adopt clearance fit between cylinder jacket and the cylinder, cylinder jacket can be moved up and down.Punching allows hydraulic pressure pass through to feed in the cylinder head in cylinder head, can regulate the pressure that surplus valve and flow controller are controlled hydraulic pressure in the hydraulic system to head gasket pressurization, has prevented from the backflow of hydraulic pressure from keeping the pressure to head gasket by retaining valve.By being connected with computer, data are directly shown on computers then, make things convenient for record data.By changing the height of cylinder jacket projection, test different heights of projection to the influence of experimental result at last.
Claims (2)
1. head gasket mechanical fatigue simulation test device comprises Screw of Worm Gear elevating mechanism, hydraulic system and cylinder, it is characterized in that:
Described Screw of Worm Gear elevating mechanism comprises worm gear, worm screw, taper roll bearing, the leading screw that is installed in the cylinder casing and the end cap that matches with the cylinder casing; Worm gear links to each other with the cylinder casing by taper roll bearing, is provided with screw thread in the worm gear and links to each other with leading screw, and worm screw is driven by stepper motor, and worm screw passes to worm gear to power and moment, is transformed into moving up and down of leading screw at last;
Described cylinder comprises cylinder head, cylinder wall and head gasket; Be provided with cylinder jacket in described cylinder wall, cylinder wall and cylinder jacket adopt clearance fit, are connected by upwarding pressure of producing of Screw of Worm Gear elevating mechanism between cylinder jacket and the head gasket;
Described hydraulic system comprises hydraulic cylinder, surplus valve, solenoid directional control valve, tensimeter, retaining valve, flow controller and hydraulic pump; Hydraulic cylinder is connected by bolt with cylinder head, and the centre is provided with O-ring seal and prevents hydraulic leak; Hydraulic pump provides power, control pressure in the hydraulic cylinder by surplus valve and flow controller, the pressure that produces when making it to simulate cylinder operation, the output of flow controller is connected to retaining valve, be provided with pressure gauge at retaining valve to the pipeline of hydraulic cylinder, pressure gauge shows the pressure that acts on head gasket; Surplus valve protection hydraulic system prevents the hypertonia in the hydraulic cylinder; Pressure in the energising of solenoid directional control valve, the outage control hydraulic cylinder.
2. head gasket mechanical fatigue simulation experiment method, its feature be in this method specifically:
Thereby at first withstand cylinder jacket by the Screw of Worm Gear elevating mechanism and give pretightning force of head gasket, cylinder jacket is to the pressure of head gasket during simulated engine work, tighten cylinder head with bolt, from the hole that cylinder head gets out, feed hydraulic pressure again, open, close to control hydraulic pressurization and put the pressure process by the solenoid directional control valve circulation, thereby the process of simulation internal combustion engine, by the size that flow controller is regulated flow, the air pressure size of reality when making it to approach engine operation more; Connect computer and solenoid directional control valve then, by detecting the number of times that the electromagnetic switch threshold voltage is connected, show hydraulic pressure on computers to the number of times of head gasket circulation pressurization, unusual up to manometric indication, head gasket fatigue failure circulation finishes; Test different heights of projection to the influence of test findings by the above test of height of projection repetition of Screw of Worm Gear elevating mechanism adjusting cylinder jacket at last.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310172302.2A CN103257041B (en) | 2013-05-10 | 2013-05-10 | Cylinder head gasket mechanical fatigue simulation test device and method |
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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 true CN103257041A (en) | 2013-08-21 |
| CN103257041B CN103257041B (en) | 2015-06-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698117A (en) * | 2013-12-17 | 2014-04-02 | 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 (7)
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|---|---|---|---|---|
| US5054314A (en) * | 1989-08-29 | 1991-10-08 | Montupet | Mechanical fatigue test bench for engine cylinder heads |
| KR20000071569A (en) * | 1999-04-13 | 2000-11-25 | 미즈노 마사루 | Material testing Machine |
| 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 |
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-
2013
- 2013-05-10 CN CN201310172302.2A patent/CN103257041B/en not_active Expired - Fee Related
Patent Citations (7)
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|---|---|---|---|---|
| US5054314A (en) * | 1989-08-29 | 1991-10-08 | Montupet | Mechanical fatigue test bench for engine cylinder heads |
| KR20000071569A (en) * | 1999-04-13 | 2000-11-25 | 미즈노 마사루 | Material testing Machine |
| 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 |
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| 周泰等: "气缸疲劳破坏预测试验平台的设计与实现", 《液压与气动》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698117A (en) * | 2013-12-17 | 2014-04-02 | 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 |
| 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 |
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| Publication number | Publication date |
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| CN103257041B (en) | 2015-06-17 |
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