CN101216392A - Bearing equipment periodical change pressure effect fatigue failure test device - Google Patents
Bearing equipment periodical change pressure effect fatigue failure test device Download PDFInfo
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- CN101216392A CN101216392A CNA2008100190674A CN200810019067A CN101216392A CN 101216392 A CN101216392 A CN 101216392A CN A2008100190674 A CNA2008100190674 A CN A2008100190674A CN 200810019067 A CN200810019067 A CN 200810019067A CN 101216392 A CN101216392 A CN 101216392A
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Abstract
Fatigue failure test device of pressure-bearing equipment under periodically changing pressure relates to pressure-bearing equipment under periodically changing pressure. The test medium is selected from heat transfer oil, an oil storage tank (2) is positioned below a test piece platform (1), the outlet of the oil storage tank (2) is connected with a suction hole of a plunger fuel pump through a stop valve (10), the exit of the plunger fuel pump (3) is connected with the inlet of an electric heater (6) through a check valve (9), the exit of the electric heater (6) is connected with the inlet of an oil supply pipe path of a four-way reversing valve (5), a branch divided from the middle portion of a connection pipe path is connected with an energy storage tank (4), the upper portion of the energy storage tank (4) is connected with a high-pressure air source (7), the exit of the oil supply pipe path of the four-way reversing valve (5) is connected with the inlet of an oil return pipe path of the reversing valve (5), the branch is connected with the interface of a test piece, the outlet of the oil return pipe path of the four-way reversing valve (5)is connected with the inlet of an oil storage tank (2) through the stop valve (10), and an overpressure protection safety valve is arranged on the energy storage tank (4).
Description
Technical field
The present invention is a kind of fatigue failure test unit, relates to the bearing device under the effect of cyclical movement pressure, is the device of a kind of testing equipment antifatigue inefficacy ability under the effect of cyclical movement pressure.
Technical background
Industries such as machinery, chemical industry are being used various device, and this wherein has large number quipments to be operated under the periodically variable pressure, and these equipment are all bearing the effect of rule or irregular alterante stress.Under the effect of periodically variable alterante stress, because the reason of the manufactured materials of equipment, or because the reason of production technology aspect can make fatigue of materials lose efficacy, intensity reduces, and influences the usability of product, and causes safety problem.Statistics shows, in the fracture accident of various machineries, nearly more than 80% since fatigue failure cause.Therefore,, check the ability of its antifatigue stress, in engineering is used, occupy an important position for the equipment that bears alterante stress.The fatigue breakdown of commercial unit be long-term a, progressive formation slowly, and harm that it causes and consequence but is unexpected, and be instantaneous with unpredictable.In the suitability for industrialized production, in the short period of time, grasp the ability of the anti-alterante stress effect of product, under the alternating pressure effect, assessment is made in the security of equipment to product, seems extremely important.This just needs a kind of device, quick test equipment, anti-alternating pressure fatigue effect and the ability that do not lose efficacy.For this reason, we have invented this pressure fatigue test device.This device is applicable to the pressure fatigue test of following container and equipment: store 1) or carry that gas, liquid or vapour-liquid, vapour are solid, container, casing, tank body and the pipeline of solid-liquid two-phase or vapour solid-liquid three-phase material; 2) carry out gas gas, liquid-liquid and the gas liquid heat interchanger of exchange heat.These tankage conditions of work are subjected to periodically variable alternating pressure effect, and therefore tankage may produce fatigue failure.
Summary of the invention
Technical matters: the purpose of this invention is to provide a kind of bearing equipment periodical change pressure effect fatigue failure test device,, reduce cost of products, guarantee production safety, all have very active operation significance for improving the quality of products.
Technical scheme: bearing equipment periodical change pressure effect fatigue failure test device of the present invention comprises test specimen platform, oil tank, plunger-type fuel pump, energy storage tank, four-way change-over valve, electric heater, high-pressure air source, four-way change-over valve drive motor, retaining valve; Test(ing) medium is a conduction oil, oil tank is positioned at the below of test specimen platform, oil tank (outlet be connected with the suction inlet of plunger-type fuel pump through stop valve, the escape hole of plunger-type fuel pump is connected with the inlet of electric heater through retaining valve, the outlet of electric heater is connected with the inlet of four-way change-over valve oil feed line, connecting line intermediate section one branch road connects energy storage tank, and the top of energy storage tank connects high-pressure air source; The outlet of four-way change-over valve oil feed line links to each other with the inlet of four-way change-over valve return line; intermediate section one branch road is connected with the interface of testpieces; the outlet of four-way change-over valve return line is connected with the inlet of oil tank through stop valve, and the overpressure protection safety valve is housed on the energy storage tank.
The height of oil tank is 0.3 to 0.65 meter, be positioned at the test specimen platform under, the height of oil tank adds the thickness of test specimen platform base, the height between 0.35 to 0.7 meter; The length of test specimen platform and wide size are littler than the length and the cross direction size of oil tank; The oil tank upside is a flute profile, and has spill port, and the inlet of the oil feed line of four-way change-over valve and the inlet of return line are positioned at the same side of four-way change-over valve, and one-way cock is installed in the escape hole top of plunger-type fuel pump.
Four-way change-over valve integral body and valve core axis are vertical installment state; It is four-way change-over valve upper horizontal plane end cap that drive motor is installed the basis, between drive motor and the four-way change-over valve by the gear reduction transmission.
Beneficial effect:
1) adopts the energy storage tank buffering and regulate supply pressure, be connected to high-pressure air source on it, can keep metastable supply pressure;
2) adopt electric heater heating conduction oil, and be used solid-state relay adjusting heating power, to obtain stable conduction oil temperature;
3) adopt four-way change-over valve as the pressure switching device, periodically provide the conduction oil that is in the alternating pressure state, create specific pressure test condition to testpieces;
4) rotation of four-way valve spool realizes that the break-make of oil circuit is switched, and pressure changes continuously and stablizes, and the frequency change adjustable extent is wide and adjustable continuously, and parts operational failure rate is low, and is safe and reliable;
5) four-way change-over valve adopts the vertical mounting means of valve core axis, and the inlet of oil feed line and the inlet of return line are positioned at the same side of four-way change-over valve, and reasonable structural design is arranged.
Description of drawings
Fig. 1 is a structural representation of the invention process;
Fig. 2 is the cut-open view of A-A position among Fig. 1;
Fig. 3 is that C among Fig. 1 is to view;
Fig. 4 is the cut-open view of B-B position among Fig. 2.
Have among the above figure: test specimen platform 1, oil tank 2, plunger-type fuel pump 3, energy storage tank 4, four-way change-over valve 5, electric heater 6, high-pressure air source 7, drive motor 8, retaining valve 9, stop valve 10.
Embodiment
Device is made up of test specimen platform 1, oil tank 2, plunger-type fuel pump 3, energy storage tank 4, four-way change-over valve 5, electric heater 6, high-pressure air source 7, and test(ing) medium is a conduction oil.The height of oil tank 2 is 0.3 to 0.65 meter, be positioned at test specimen platform 1 under; Test specimen platform length and length and the wide undersized of cross direction size than oil tank, the difference of size highly is 0.35 to 0.7 meter in 5cm on each direction; The oil tank outlet is connected through the suction inlet of stop valve 10 with plunger-type fuel pump 3; The escape hole of plunger-type fuel pump 3 is connected with electric heater 6 inlets through retaining valve; The outlet of electric heater 6 is connected with the inlet of four-way change-over valve 5 oil feed lines, and connecting line intermediate section one branch road connects energy storage tank 4; The top of energy storage tank 4 connects high-pressure air source; The outlet of four-way change-over valve 5 oil feed lines links to each other with the inlet of reversal valve 5 return lines, and intermediate section one branch road is connected with the interface of testpieces; The outlet of four-way change-over valve 5 return lines is connected through the inlet of stop valve 10 with oil tank 2.The overpressure protection safety valve is housed on the energy storage tank 4.The front of test specimen platform 1, left and right sides face, end face are equipped with the implosion guard window, form an enclosure space.
Adopt conduction oil as test(ing) medium.Utilize high-pressure oil pump, conduction oil is forced into test pressure, utilizes electric heater to be heated to test temperature, and utilize four-way change-over valve periodically to supply with testpieces, being implemented in the applied pressure of setting up the one-period variation on the testpieces, and keep certain test temperature.Accumulator plays the effect of buffering and stability test pressure, when the valve break-make, relaxes the rapid variation of the pressure that brings because of the flow sudden change, makes pressure waveform near sinusoidal curve.
Integral arrangement, the height of oil tank 2 are 0.3 to 0.65 meter, be positioned at test specimen platform 1 under.The size of test specimen platform column inboard is identical with the width dimensions of oil tank; Oil tank 2 tops are long-pending oil groove shape, and have spill port.Four-way change-over valve 5 integral body and valve core axis are vertical installment state; It is four-way change-over valve 5 upper horizontal plane end caps that drive motor 8 is installed bases, between drive motor and the four-way change-over valve by the gear reduction transmission.The inlet of the oil feed line of four-way change-over valve 5 and the inlet of return line are positioned at the same side of four-way change-over valve.Install hand stop valve between the suction inlet of plunger-type fuel pump 3 and the oil tank 2, one-way cock is installed in the escape hole top of plunger-type fuel pump 3, also installs hand stop valve between the outlet of four-way change-over valve 5 return lines and the oil tank 2.The interface that is connected with testpieces is provided with the pressure and temperature sensor.
Its workflow is as follows: utilize high-pressure oil pump, conduction oil is forced into test pressure, utilize electric heater to be heated to test temperature, and utilize four-way change-over valve periodically to divide and connect with the pressure-bearing capacity of test device, set up certain pressure state at it, periodically testpieces pressure-bearing volume part and oil tank are connected relief pressure.Like this, just on testpieces, set up the applied pressure of one-period variation, testpieces is operated under the periodicity alternating pressure, through continuous action after a while, to reach testpieces under certain temperature condition, under certain periodicity alternating pressure effect, the purpose of pressure fatigue failure test.In the process of the test, high-pressure oil pump work is continuous, and is discontinuous to testpieces fuel feeding process.In the time period of four-way change-over valve cut-out testpieces oil feed line, the conduction oil of high-pressure oil pump output is sent to accumulator and stores; And in the moment of four-way change-over valve call through test part oil feed line, lower because of being pressed, the conduction oil flow increases suddenly, surpasses the supply capability of high-pressure oil pump, exceeds the part conduction oil, is provided by accumulator.Accumulator plays the effect of buffering and stability test pressure, makes pressure change waveform and approaches sinusoidal curve.
Periodical change pressure effect fatigue failure test device; the condition of its compressive resistance torture test of check is provided for pressure resistant vessel; for the exploitation and the check of new product provides a kind of Authentication devices and research technique, can utilize this device that product is tested, find the shortcomings and deficiencies of product by test; seek improved measure; check improved effect,, reduce cost of products for improving the quality of products; guarantee production safety, all have very active operation significance.
Claims (3)
1. a bearing equipment periodical change pressure effect fatigue failure test device is characterized in that this device comprises test specimen platform (1), oil tank (2), plunger-type fuel pump (3), energy storage tank (4), four-way change-over valve (5), electric heater (6), high-pressure air source (7), four-way change-over valve drive motor (8), retaining valve (9).Oil tank (2) is positioned at the below of test specimen platform (1), the outlet of oil tank (2) is connected through the suction inlet of stop valve (10) with plunger-type fuel pump (3), the escape hole of plunger-type fuel pump (3) is connected through the inlet of retaining valve (9) with electric heater (6), the outlet of electric heater (6) is connected with the inlet of four-way change-over valve (5) oil feed line, connecting line intermediate section one branch road connects energy storage tank (4), and the top of energy storage tank (4) connects high-pressure air source (7); The outlet of four-way change-over valve (5) oil feed line links to each other with the inlet of four-way change-over valve (5) return line; intermediate section one branch road is connected with the interface of testpieces; the outlet of four-way change-over valve (5) return line is connected through the inlet of stop valve (10) with oil tank (2), and energy storage tank is equipped with the overpressure protection safety valve on (4).
2. bearing equipment periodical change pressure effect fatigue failure test device according to claim 1, the height that it is characterized in that oil tank (2) is 0.3 to 0.65 meter, be positioned at test specimen platform (1) under, the height of oil tank adds the thickness of test specimen platform base, and height is between 0.4 to 0.7 meter; The length of test specimen platform and wide size are littler than the length and the cross direction size of oil tank (2); The oil tank upside is long-pending oil groove shape, and has spill port, and the inlet of the oil feed line of four-way change-over valve (5) and the inlet of return line are positioned at the same side of four-way change-over valve, and one-way cock is installed in the escape hole top of plunger-type fuel pump (3).
3. bearing equipment periodical change pressure effect fatigue failure test device according to claim 1 is characterized in that four-way change-over valve (5) integral body and valve core axis are vertical installment state; It is four-way change-over valve (5) upper horizontal plane end cap that drive motor (8) is installed the basis, between drive motor and the four-way change-over valve by the gear reduction transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810019067A CN100590413C (en) | 2008-01-11 | 2008-01-11 | Bearing equipment periodical change pressure effect fatigue failure test device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810019067A CN100590413C (en) | 2008-01-11 | 2008-01-11 | Bearing equipment periodical change pressure effect fatigue failure test device |
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| Publication Number | Publication Date |
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| CN101216392A true CN101216392A (en) | 2008-07-09 |
| CN100590413C CN100590413C (en) | 2010-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810019067A Expired - Fee Related CN100590413C (en) | 2008-01-11 | 2008-01-11 | Bearing equipment periodical change pressure effect fatigue failure test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207094A (en) * | 2012-01-16 | 2013-07-17 | 上海宝钢工业技术服务有限公司 | Pressure container detection cycle judgment method based on weld joint alignment tolerance and edge angles |
| CN110411843A (en) * | 2019-08-02 | 2019-11-05 | 合肥通用机械研究院有限公司 | A kind of pressure vessel or pipe test by air-pressurizing system and test method |
-
2008
- 2008-01-11 CN CN200810019067A patent/CN100590413C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207094A (en) * | 2012-01-16 | 2013-07-17 | 上海宝钢工业技术服务有限公司 | Pressure container detection cycle judgment method based on weld joint alignment tolerance and edge angles |
| CN110411843A (en) * | 2019-08-02 | 2019-11-05 | 合肥通用机械研究院有限公司 | A kind of pressure vessel or pipe test by air-pressurizing system and test method |
| CN110411843B (en) * | 2019-08-02 | 2022-07-15 | 合肥通用机械研究院有限公司 | Pressure container or pipeline air pressure test system and test method |
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| Publication number | Publication date |
|---|---|
| CN100590413C (en) | 2010-02-17 |
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