CN202928892U - Fatigue testing equipment for high-pressure oil pipe - Google Patents
Fatigue testing equipment for high-pressure oil pipe Download PDFInfo
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- CN202928892U CN202928892U CN 201220672624 CN201220672624U CN202928892U CN 202928892 U CN202928892 U CN 202928892U CN 201220672624 CN201220672624 CN 201220672624 CN 201220672624 U CN201220672624 U CN 201220672624U CN 202928892 U CN202928892 U CN 202928892U
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Abstract
The utility model discloses fatigue testing equipment for a high-pressure oil pipe. The fatigue testing equipment comprises a fuel tank, a high-frequency impulse power source, a first connecting piece, a second connecting piece and a pressure relief device, wherein an oil inlet of the first connecting piece is connected with an oil outlet of the high-frequency impulse power source, and an oil outlet of the first connecting piece is connected with an oil inlet of the high-pressure oil pipe to be tested; an oil inlet of the second connecting piece is connected with an oil outlet of the high-pressure oil pipe to be tested, and an oil outlet of the seconding connecting piece is connected with an oil inlet of the pressure relief device; and an oil outlet of the pressure relief device returns to the fuel tank. According to the fatigue testing equipment, the fatigue life of the high-pressure oil pipe to be tested can be checked under the working condition with high pressure, high frequency and high amplitude, and the purposes of strengthening the high-pressure oil pipe and rapidly checking the fatigue life of the high-pressure oil pipe can be achieved under the condition of being higher than the actual fuel pressure, pulse frequency and pulse amplitude of an engine.
Description
Technical field
The utility model relates to technical field of engines, especially for the engine high pressure oil pipe being carried out the testing equipment of fatigue life test.
Background technology
High-pressure oil pipe is one of critical component of engine fuel oil system, be complex-shaped cast part, the fuel oil that high pressure, high frequency, the high-amplitude of being responsible for that fuel pump is transported fluctuates is transported to fuel injector in real time, consists of fuel systems with fuel pump, fuel injector etc., completes the fuel delivery to engine.
Fuel oil needs very high pressure before spraying into cylinder, could realize preferably atomizing, combustion efficiency, and the pressure of fuel oil normally realizes by fuel pump, and the maximum fuel pressure of present mechanical fuel pump formula diesel engine is usually at 800～1500bar.
The fuel pressure of mechanical pump fuel system can change along with the variation of fuel pump corner, usually the pressure in high-pressure oil pipe is down to 0bar can be elevated to the fuel oil maximum pressure from 0bar in a pressure pulse after again, in one second, the number of times of fuel pressure fluctuation is pulsed frequency, it changes along with the variation of engine speed, and in the domestic diesel engine high-pressure oil pipe, the pulsed frequency of fuel oil is generally 10～20Hz at present.
High-pressure oil pipe bears comparatively harsh condition of work in the course of the work; especially mechanical pump high-pressure oil pipe; its hf and hv pulse that will bear fuel oil impacts; therefore high-pressure oil pipe often the fatigue crack problem can occur; fatigue crack not only can directly cause engine failure, and the fuel leakage that is caused by crackle also can very easily cause the serious consequences such as fire even explodes.
At present, testing equipment for the engine high pressure oil pipe is that the high-pressure oil pipe static pressure is suppressed equipment, namely can only make high-pressure oil pipe maintain certain high pressure (2500bar usually) lower a period of time (common 60s) and carry out withstand voltage examination, but static load test can not replace torture test, therefore can not realize examination fatigue lifetime to high-pressure oil pipe.
Therefore, how to realize being the technical matters that those skilled in the art are badly in need of solving to the high-pressure oil pipe examination of fatigue lifetime.
The utility model content
The purpose of this utility model is to provide a kind of high-pressure oil pipe fatigue rig.This equipment can make tested high-pressure oil pipe complete the examination of fatigue lifetime under the operating mode of high pressure, high frequency, high-amplitude.
For achieving the above object, the utility model provides a kind of high-pressure oil pipe fatigue rig, comprises fuel tank, high-frequency impulse power source, the first web member, the second web member and pressure relief device; The oil-in of described the first web member connects the oil-out of described high-frequency impulse power source, and the oil-out of described the first web member is used for connecting the oil-in of tested high-pressure oil pipe; The oil-in of described the second web member is used for connecting the oil-out of tested high-pressure oil pipe, and the oil-out of described the second web member connects the oil-in of described pressure relief device; The oil-out of described pressure relief device is back to fuel tank.
Preferably, the oil-out of described pressure relief device is connected with fuel tank by the 3rd web member.
Preferably, be provided with fuel filter between described fuel tank and high-frequency impulse power source.
Preferably, described high-frequency impulse power source, pressure relief device are equipped with the cooling device of lowering the temperature.
Preferably, described high-frequency impulse power source is monoblock pump and control system thereof.
Preferably, described high-frequency impulse power source is gas-liquid booster pump and control system thereof.
Preferably, described high-frequency impulse power source is for being total to rail pump and control system thereof.
Preferably, described pressure relief device is fuel injector.
Preferably, described fuel injector is positive injector.
Preferably, described the first web member, the second web member and the 3rd web member are the connecting line with joint.
the high frequency of fuel oil in the high-pressure oil pipe pipe, it is the one of the main reasons that causes the high-pressure oil pipe leakage of oil that high-voltage pulse impacts caused oil pipe fatigue crack, the high-pressure oil pipe fatigue rig employing high-frequency impulse power source that the utility model provides and pressure relief device are realized the simulation to engine fuel oil system, provide sufficiently high fuel pressure by the high-frequency impulse power source, realize the high frequency of oil pressure by the switching of controlling power source parameter and pressure relief device, the high-amplitude fluctuation, thereby make tested high-pressure oil pipe at high pressure, high frequency, complete the examination of fatigue lifetime under the operating mode of high-amplitude, and can be at the actual fuel pressure higher than engine, realize the reinforcement to high-pressure oil pipe under the condition of pulsed frequency and pulse amplitude, examination fatigue lifetime fast.
Description of drawings
Fig. 1 provides the structural representation of a kind of embodiment of high-pressure oil pipe fatigue rig for the utility model.
Fig. 2 is the experiment process figure of high-pressure oil pipe fatigue rig shown in Figure 1.
In figure:
1. monoblock pump 2. three phase electric machine 3. frequency converter 4. controller 5. fuel injector 6. fuel tank 7. fuel filter 8. first web member 9. second web member 10. the 3rd tested high-pressure oil pipes of web member 11.
Embodiment
In order to make those skilled in the art person understand better the utility model scheme, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1, Fig. 1 provides the structural representation of a kind of embodiment of high-pressure oil pipe fatigue rig for the utility model.
In a kind of embodiment, high-pressure oil pipe fatigue rig provided by the utility model, select monoblock pump 1 as pressure source, adopt three phase electric machine 2 to drive, three phase electric machine 2 is controlled by frequency converter 3 and controller 4, pressure release and the circulation system are comprised of positive injector 5, fuel tank 6, fuel filter 7 etc., and pressure source and fuel injector are equipped with the cooling device (not shown) of lowering the temperature, with to greatest extent near the practical working situation of high-pressure oil pipe.
In order to realize the reinforcement examination to high-pressure oil pipe, the maximum pressure that monoblock pump 1 can provide is 1600bar; Pulsed frequency is determined by the rotating speed of three phase electric machine 2, is usually got 20 ~ 30Hz; The pulse width of fuel oil is controlled by positive injector 5 and monoblock pump 1, and the pressure surge scope of monoblock pump 1 is 0 ~ 1600bar, and the opening pressure of fuel injector 5 is usually in the 200bar left and right.
The first web member 8 be connected web member 9 and be respectively the pipeline (belt lacing) that connects monoblock pump 1 and tested high-pressure oil pipe 11, tested high-pressure oil pipe 11 and fuel injector 5, the 3rd web member 10 is for connecting the pipeline (belt lacing) of fuel injector 5 and fuel tank 6.
Wherein, the oil-in of the first web member 8 connects the oil-out of monoblock pump 1, and the oil-out of the first web member 8 connects the oil-in of tested high-pressure oil pipe 11; The oil-in of the second web member 9 connects the oil-out of tested high-pressure oil pipe 11, and the oil-out of the second web member 9 connects the oil-in of fuel injector 5; The oil-out of fuel injector 5 connects the oil-in of the 3rd web member 10, and the oil-out of the 3rd web member 10 connects fuel tank 6, and fuel filter 7 is located between fuel tank 6 and monoblock pump 1.
Certainly, above-mentioned monoblock pump power source can adopt gas supercharge pump at night together other devices that can realize the dither fuel feeding such as rail pump substitute.
Please refer to Fig. 2, Fig. 2 is the experiment process figure of high-pressure oil pipe fatigue rig shown in Figure 1.
As shown in the figure, comprise the following steps:
Step S1: high-pressure oil pipe is fixed by frock, and its oil-in connects the oil-out of high-frequency impulse power source, and oil-out connects the oil-in of pressure relief device;
Step S2: bear oil pressure, pulsed frequency and strengthen the examination coefficient according to the actual of high-pressure oil pipe, regulating the input parameter of high-frequency impulse power source, making output pressure and pulsed frequency satisfy check requirements;
Step S3: according to the designing requirement of high-pressure oil pipe, the working condition of engine complete machine and standard fatigue lifetime that the durable performance assessment criteria of complete machine is formulated high-pressure oil pipe, usually get 5 * 10
7
Step S4: if the high-pressure oil pipe examination life-span surpasses standard fatigue lifetime of high-pressure oil pipe, high-pressure oil pipe is examined by fatigue, otherwise is considered as defective.
The course of work of above-mentioned testing equipment is as follows:
High-pressure oil pipe 11 to be measured is fixedly mounted between the first web member 8 and the second web member 9, two ends respectively be connected monoblock pump 1 and fuel injector 5 and be communicated with, the fuel oil of the high pressure of monoblock pump 1 output, high frequency, high-amplitude fluctuation is ejected into the 3rd web member 10 through after high-pressure oil pipe 11 to be measured by fuel injector 5, flow back to afterwards in fuel tank 6 and carry out cooling, fuel oil in fuel tank 6 is sucked pressurization by monoblock pump 1 after fuel filter 7 filters, be input to again afterwards in high-pressure oil pipe 11 to be measured, reciprocation cycle is until the high-pressure oil pipe examination is completed.
the high-pressure oil pipe fatigue rig that the utility model provides, employing monoblock pump etc. can realize that the equipment of high-frequency impulse pressure is as pressure source, utilize the realization of electric-control system and motor to the control of pressure source, and adopt the pressure release equipment such as hydraulic injection device to realize circulating the high-pressure oil pipe intermediate fuel oil, the pulse shock effect of the fuel oil that bears with high-pressure oil pipe on engine is basically identical, namely bear the extremely high pressure of fuel oil, high-frequency percussion and high-amplitude pressure surge, duty that can simulated engine realizes examination fatigue lifetime to high-pressure oil pipe, and can realize the reinforcement of high-pressure oil pipe is examined fatigue lifetime with larger pressure and frequency (with respect to true pressure and the frequency of engine).
Certainly, above-mentioned high-pressure oil pipe fatigue rig is only a kind of preferred version, specifically is not limited to this, can make according to actual needs pointed adjustment on this basis, thereby obtains different embodiments.For example, fuel injector also can adopt other pressure relief device to substitute, and perhaps tested high-pressure oil pipe is arranged on higher-order of oscillation test unit, to realize the more real simulation etc. to the high-pressure oil pipe working environment.Because mode in the cards is more, just illustrate no longer one by one here.
Above high-pressure oil pipe fatigue rig provided by the utility model is described in detail.Used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand core concept of the present utility model.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (10)
1. a high-pressure oil pipe fatigue rig, is characterized in that, comprises fuel tank, high-frequency impulse power source, the first web member, the second web member and pressure relief device; The oil-in of described the first web member connects the oil-out of described high-frequency impulse power source, and the oil-out of described the first web member is used for connecting the oil-in of tested high-pressure oil pipe; The oil-in of described the second web member is used for connecting the oil-out of tested high-pressure oil pipe, and the oil-out of described the second web member connects the oil-in of described pressure relief device; The oil-out of described pressure relief device is back to fuel tank.
2. high-pressure oil pipe fatigue rig according to claim 1, is characterized in that, the oil-out of described pressure relief device is connected with fuel tank by the 3rd web member.
3. high-pressure oil pipe fatigue rig according to claim 2, is characterized in that, is provided with fuel filter between described fuel tank and high-frequency impulse power source.
4. high-pressure oil pipe fatigue rig according to claim 3, is characterized in that, described high-frequency impulse power source, pressure relief device are equipped with the cooling device of lowering the temperature.
5. the described high-pressure oil pipe fatigue rig of according to claim 2 to 4 any one, is characterized in that, described high-frequency impulse power source is monoblock pump and control system thereof.
6. the described high-pressure oil pipe fatigue rig of according to claim 2 to 4 any one, is characterized in that, described high-frequency impulse power source is gas-liquid booster pump and control system thereof.
7. the described high-pressure oil pipe fatigue rig of according to claim 2 to 4 any one, is characterized in that, described high-frequency impulse power source is for being total to rail pump and control system thereof.
8. the described high-pressure oil pipe fatigue rig of according to claim 2 to 4 any one, is characterized in that, described pressure relief device is fuel injector.
9. high-pressure oil pipe fatigue rig according to claim 8, is characterized in that, described fuel injector is positive injector.
10. the described high-pressure oil pipe fatigue rig of according to claim 2 to 4 any one, is characterized in that, described the first web member, the second web member and the 3rd web member are the connecting line with joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220672624 CN202928892U (en) | 2012-12-07 | 2012-12-07 | Fatigue testing equipment for high-pressure oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220672624 CN202928892U (en) | 2012-12-07 | 2012-12-07 | Fatigue testing equipment for high-pressure oil pipe |
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| Publication Number | Publication Date |
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| CN202928892U true CN202928892U (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220672624 Expired - Fee Related CN202928892U (en) | 2012-12-07 | 2012-12-07 | Fatigue testing equipment for high-pressure oil pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018107A (en) * | 2012-12-07 | 2013-04-03 | 潍柴动力股份有限公司 | Method and equipment for testing fatigue of high pressure oil pipe |
-
2012
- 2012-12-07 CN CN 201220672624 patent/CN202928892U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018107A (en) * | 2012-12-07 | 2013-04-03 | 潍柴动力股份有限公司 | Method and equipment for testing fatigue of high pressure oil pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20130508 Termination date: 20141207 |
|
| EXPY | Termination of patent right or utility model |