CN103115755A - Motive seal thermal failure test method - Google Patents
Motive seal thermal failure test method Download PDFInfo
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- CN103115755A CN103115755A CN2011103640307A CN201110364030A CN103115755A CN 103115755 A CN103115755 A CN 103115755A CN 2011103640307 A CN2011103640307 A CN 2011103640307A CN 201110364030 A CN201110364030 A CN 201110364030A CN 103115755 A CN103115755 A CN 103115755A
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Abstract
The invention discloses a method for carrying out a motive seal thermal failure test on a subjected sealing piece assembled in a transmission device. The method comprises a first step of setting parameters of test pressure, medium temperature, test revolving speed and test time needed by the subjected sealing piece motive seal thermal failure test, a second step of starting to heat the transmission device according to the set medium temperature, a third step of judging when the medium temperature in the transmission device reaches the set medium temperature by utilizing of a signal transmitted by a microsensor, providing pressure for the transmission device provided with the subjected sealing piece until oil pressure in the transmission device reaches the set test pressure and starting a motor to enable the test revolving speed of the transmission device to reach the set test revolving speed, and a fourth step of keeping the medium temperature, the test pressure and the test revolving speed unchanged until the set test time is reached, and recording test data related to temperature rising state, time, pressure and revolving speed about the subjected sealing piece before the set test time is reached.
Description
Technical field
The present invention relates to the experiment simulation field, particularly relate to the motive seal thermal failure test method for the seal of gearing.
Background technology
Kinematic train is as the important component part of special vehicle, and its performance directly affects maneuverability (acceleration, braking, turning to property, trafficability characteristic), reliability and the serviceable life of vehicle, and the inefficacy of kinematic train directly causes special vehicle to be lost and uses.
Seal is one of kinematic train important foundation part, and seal was in case lost efficacy, and will cause the low or oil pressure of control-oil pressure can not built, and system oil pressure is unstable, will make car load lose power, can't complete straight, turns to, the function such as braking.The usable range of seal and poor durability, the working time does not reach the requirement in serviceable life, will directly affect the minimal maintenance mileage of gearing, causes the reliability of whole kinematic train significantly to reduce.
Seal in use no matter be due to friction or due to the intensification of fluid itself, all may cause seal fails.Sealing in gearing belongs to motive seal.Therefore, be necessary seal is carried out the test of motive seal thermal failure, the examination seal is in the variation of soaking condition lower seal performance.
Therefore, the needs of existence to a kind of motive seal thermal failure test method.
Summary of the invention
Defective for prior art, the invention provides a kind of method that the tested seal that is assemblied in gearing is carried out the test of motive seal thermal failure, comprise step: arrange by the test specimen motive seal thermal failure test parameter of required test pressure, medium temperature, test speed and test duration; Begin gearing is heated according to the medium temperature of setting; Utilize the signal that microsensor transmits to judge when the interior medium temperature of gearing reaches the medium temperature of setting, pressure is provided for the gearing that is equipped with tested seal until the oil pressure in gearing reaches the test pressure of setting, and starter motor make the test speed of gearing reach the test speed of setting; Keep medium temperature, test pressure and test speed constant, until after arriving the test duration of setting, and be recorded in the test duration test figure relevant with time, pressure and rotating speed of the temperature rising state about tested seal before that reaches setting.
Wherein, medium temperature in described gearing detects by a plurality of micro temperature sensors, described a plurality of micro temperature sensor is arranged in tested seal week upwards equably by the through hole that is used on the end cap of fastening tested seal, and utilizes bolt that micro temperature sensor is fixed.
Wherein, the described quantity that mostly is micro temperature sensor is 3.
The described method that the tested seal that is assemblied in gearing is carried out the test of motive seal thermal failure further comprises: preserve described test figure, and show data result and the performance curve of whole test.
The described method that the tested seal that is assemblied in gearing is carried out the test of motive seal thermal failure further comprises: the parameter about the test of motive seal thermal failure in the test of motive seal thermal failure in the Real-Time Monitoring test changes.
The described method that the tested seal that is assemblied in gearing is carried out the test of motive seal thermal failure, further comprise: according to described test figure, analysis is determined the thermal failure performance of tested seal according to temperature and the relation of test duration, test pressure and the test speed preset of tested seal under default test pressure, medium temperature, test speed and test duration Parameter Conditions.
The present invention carries out the research of Analysis of Heating and inefficacy by the seal temperature rise test to sealing ring, obtain to affect the actual rule of sealing property and temperature rise and test specimen temperature rise to the combined influence of sealing property.
Description of drawings
Fig. 1 shows according to the micro temperature sensor arrangenent diagram that is used for tested seal.
Fig. 2 is according to micro temperature sensor circumferential arrangement figure of the present invention.
Fig. 3 be tested seal the temperature acquisition signal flow to schematic diagram.
Fig. 4 is test specimen temperature rise-pressure dependence curve map.
Fig. 5 is test specimen temperature rise-rotation speed relation curve map.
Fig. 6 is test specimen temperature rise-time history.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for explanation the present invention, rather than are used for restriction the present invention.
Seal is one of kinematic train important foundation part, and seal was in case lost efficacy, and will cause the low or oil pressure of control-oil pressure can not built, and system oil pressure is unstable, will make car load lose power, can't complete straight, turns to, the function such as braking.In order to examine the motive seal performance of the seal in gearing, need to be to sealing ring temperature variation and carry out detailed detection separately under different operating modes.According to the present invention, for the seal of gearing, under the charge oil pressure and test speed of a certain setting, in the test duration of setting, the temperature variations of observation sealing ring, the variation of the leakage rate of recording gear, moment of torsion and test specimen temperature.After reaching the test duration, off-test.By like this, can determine the motive seal performance of tested seal in the temperature rise process.
For the temperature characterisitic of research sealing ring, in sealing ring is carried out the temperature rise test testing process, micro temperature sensor need to be arranged in oil pocket end cap inside and realize the approximate temperature rise of test specimen is detected near the seal place.According to the present invention, the oil pocket end cap while is as matching parts, the main shaft support seat of tested seal.Owing in oil pocket front and rear cover inside, multipoint temperature sensor being set, can detect the circumferential temperature rise of tested seal, thereby can realize the situations such as the circumferential temperature rise homogeneity of tested seal analysis, promote the accuracy of the approximate testing result of test specimen temperature rise.
Referring to Fig. 1, show according to the micro temperature sensor arrangenent diagram that is used for tested seal.As shown in Figure 1, the housing of gearing is static, and turning axle rotates relative to housing.Seal element is packed into after closure gasket groove, relies on self elastic force to make its external cylindrical surface be close to the inner cylinder face of housing.Actuating medium acts on the left end face and the inboard face of cylinder of seal element simultaneously by the gap.When rotating shaft was rotated, the inboard actuating medium of band moving sealing element rotated, and the radial centrifugal force of generation has further been strengthened the radial seal effect.So the seal element external cylindrical surface is pressed on the inner cylinder face of housing by the pressure on its inner cylinder face, form first sealing surface.But because the seal element right flank is subjected to the working medium pressure effect, its left surface and closure gasket groove left side is adjacent to, forms second sealing surface, cause like this two sealing surfaces that actuating medium leaks all sealed element fit, realize the purpose that seals.
Referring to Fig. 1, seal is packed in closure gasket groove.End cap is pressing seal with the fixing seal ring.End cap can be fixed on the housing of tested gearing by trip bolt.Divide equally on the end cap end face and be distributed with a plurality of through holes, be used for holding micro temperature sensor.Each through hole is being provided with threaded hole near the end face side that does not contact with seal, for holding the fastening micro temperature sensor of bolt.In the present invention, preferably, 3 through holes evenly distribute on the end cap end face.By micro temperature sensor, can detect near the approximate temperature rise of seal place's realization to test specimen in oil pocket end cap inside.
In Fig. 1, only show an end of oil pocket, in fact also there is the other end in oil pocket.Suppose that shown in Figure 1 is the oil pocket front end end cover.According to the present invention, each sealing ring in the front and rear cover of oil pocket arranges that equably micro temperature sensor is similar to temperature rise and detects.Preferably, each sealing ring in front and rear cover arranges that the temperature point number is 3, circumferentially is evenly arranged along sealing ring, realizes the analysis to situations such as the circumferential temperature rise homogeneitys of tested seal, and the circumferential arrangement form as shown in Figure 2.Thermopair is all adopted in the test of left side (being positioned at the unshowned oil pocket rear end cap of Fig. 1) temperature, right side (being positioned at oil pocket front end end cover shown in Figure 1) temperature and cavity medium temperature.When 3 temperature sensors of each seal arrangement, for the situation with two two test oil pockets, the front and rear cover of two test oil pockets is arranged 12 temperature sensors altogether.
According to the present invention, a plurality of micro temperature sensors are arranged in tested seal week upwards equably by the through hole that is used on the end cap of fastening tested seal, and utilize bolt that micro temperature sensor is fixed.Then, utilize and to be evenly distributed on the circumferential a plurality of temperature sensors of tested seal and tested seal to be carried out temperature rise is approximate detects to obtain the circumferential temperature information of seal.The detection of test specimen temperature is temperature signal to be converted to the voltage signal of corresponding with it standard by temperature sensor and temperature transmitter, be sent to data collecting plate card by data acquisition change-over terminal daughter board again, data collecting plate card carries out A/D conversion to be made these signals be received by industrial control computer the line number of going forward side by side to process according to one's analysis and show, obtaining temperature detection data (as shown in Figure 3).
Motive seal thermal failure test parameters arranges
Detected parameters in the thermal failure test is to describe the required pre-set parameter of sealed test piece temperature rise test.Before the test of motive seal thermal failure, set concrete index according to thermal failure test needs, arrange and complete test.The main experimental parameter declaration of setting is as follows, as shown in table 1.
Table 1 thermal failure test main experimental detected parameters
| Parameter name | The parameter meaning |
| Test pressure | Charge oil pressure in process of the test |
| Medium temperature | The test oil temperature of test oil pocket |
| Test speed | The rotational speed of running-in test sealing ring |
| Test duration | Carry out temperature rise test in setting time |
| The selection of test oil pocket | Select the oil pocket of test, can select simultaneously two or one of them |
According to motive seal thermal failure test method of the present invention, at first, as previously mentioned, a plurality of uniform micro temperature sensors are arranged in tested seal (test specimen) week upwards equably by the through hole that is used on the end cap of fastening tested seal, and microsensor is fixed.Preferably, the quantity of microsensor is 3.Then, the needs according to the test of motive seal thermal failure set in advance detected parameters.As shown in table 1, default detected parameters comprises test pressure, medium temperature, test speed and test duration at least.Test macro for having at least two test oil pockets also needs to arrange the selection of test oil pocket.Next, test macro begins heating according to predefined medium temperature.After the signal judgement that transmits according to microsensor reached default medium temperature, test macro was opened Oil pump electrical machinery automatically, and beginning provides pressure to the gearing that is equipped with tested seal (test specimen).Then, the automatic starter motor of test macro, motor-driven moment of torsion be to gearing, and after making gearing reach default test speed, test macro records in the sampling time and the Processing Test data.Keep medium temperature, charge oil pressure and test speed in gearing constant, until after arriving the test duration of setting, the test of temperature rise thermal failure finishes automatically.Preserve test figure under predefined catalogue, show data result and the performance curve of whole test.In can the test of Real-Time Monitoring thermal failure in motive seal thermal failure test, the parameter of gearing changes.Stop the test figure that the rear automatic preservation of test macro of motive seal thermal failure test has been carried out.
According to testing the test figure that obtains, analyze under default detected parameters condition the temperature of test specimen and the parameter of presetting such as the relation of time, pressure and rotating speed.
Referring to Fig. 4, Fig. 5 and Fig. 6, show the relation curve that test power loss and pressure, rotating speed, temperature are comprehensively revealed in the sealing of adopting motive seal thermal failure test method of the present invention to obtain.In the example of Fig. 4-6, set the manipulation oil pressure and be respectively 1.0MPa, 1.5MPa, 2.0MPa and 2.5MPa, when the speed of mainshaft is got respectively 1000rpm, 3000rpm and 5000rpm, measure the temperature rising state of sealing ring and the relation of time, pressure and rotating speed.
According to Fig. 4-6 as can be known, the trial value of the leakage rate of test specimen increases along with the increase of rotating speed, pressure medium and temperature.The seal leakage amount is subjected to the impact of pressure medium comparatively remarkable, and under the operating condition of test of different pressures, the inclined degree of Leak Off Test (LOT) curve continues to increase.Under different medium temperatures, leakage rate is same to be changed obviously.
From the curve of test findings and Fig. 4-6, can draw: work as invariablenes turning speed, seal friction moment increases with the increase of pressure medium.And test findings further test show, after reaching a certain pressure, the moment of friction of sealing ring raises suddenly, this is to cause the sealing ring activity interval to reduce because pressure increases, lubricating status is destroyed, and finds that the test test specimen has distortion.So in the process of design seal, note improving the transverse parameters of sealing ring, this will improve the working pressure that seal bears.Under constant pressure medium, the rising that the power of sealing changes with rotating speed is obvious line style variation, shows that rotating speed is higher, and power loss is larger, shows that namely the leakage rate of sealing is larger.
Rotating speed is the principal element that affects the test specimen temperature rise, and along with the raising of rotating speed, heat of friction produces high temperature at sealing off gap, and the test specimen temperature rise has significant increase.When temperature surpassed the serviceability temperature of material, sealing ring may produce the faults such as fracture, melting and hot tearing.In order to guarantee the operation of sealing ring long time stability ground, must take to control the measure of temperature rise, make within its temperature is in normal range of operation.The temperature rise of test specimen has the trend of rising equally along with the increase of pressure medium, show that pressure medium is also the influence factor of test specimen temperature rise.
According to the present invention, by the seal temperature rise test, sealing ring is carried out the research of Analysis of Heating and inefficacy, can obtain to affect the actual rule of sealing property and temperature rise and test specimen temperature rise to the combined influence of sealing property.
The above is only the preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. one kind is carried out to the tested seal that is assemblied in gearing the method that the motive seal thermal failure is tested, and comprises step:
Arrange by the test specimen motive seal thermal failure test parameter of required test pressure, medium temperature, test speed and test duration;
Begin gearing is heated according to the medium temperature of setting;
Utilize the signal that microsensor transmits to judge when the interior medium temperature of gearing reaches the medium temperature of setting, pressure is provided for the gearing that is equipped with tested seal until the oil pressure in gearing reaches the test pressure of setting, and starter motor make the test speed of gearing reach the test speed of setting;
Keep medium temperature, test pressure and test speed constant, until after arriving the test duration of setting, and be recorded in the test duration test figure relevant with time, pressure and rotating speed of the temperature rising state about tested seal before that reaches setting.
2. method of carrying out the test of motive seal thermal failure to being assemblied in tested seal in gearing as claimed in claim 1, wherein, medium temperature in described gearing detects by a plurality of micro temperature sensors, described a plurality of micro temperature sensor is arranged in tested seal week upwards equably by the through hole that is used on the end cap of fastening tested seal, and utilizes bolt that micro temperature sensor is fixed.
3. method of carrying out the test of motive seal thermal failure to being assemblied in tested seal in gearing as claimed in claim 2, wherein, the described quantity that mostly is micro temperature sensor is 3.
4. method of carrying out the test of motive seal thermal failure to being assemblied in tested seal in gearing as claimed in claim 1 further comprises:
Preserve described test figure, and show data result and the performance curve of whole test.
5. method of carrying out the test of motive seal thermal failure to being assemblied in tested seal in gearing as claimed in claim 1 further comprises:
The parameter about the test of motive seal thermal failure in the test of motive seal thermal failure in the Real-Time Monitoring test changes.
6. method of carrying out the test of motive seal thermal failure to being assemblied in tested seal in gearing as claimed in claim 4 further comprises:
According to described test figure, analysis is determined the thermal failure performance of tested seal according to temperature and the relation of test duration, test pressure and the test speed preset of tested seal under default test pressure, medium temperature, test speed and test duration Parameter Conditions.
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| CN2011103640307A CN103115755A (en) | 2011-11-16 | 2011-11-16 | Motive seal thermal failure test method |
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| CN2011103640307A CN103115755A (en) | 2011-11-16 | 2011-11-16 | Motive seal thermal failure test method |
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Cited By (7)
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| CN106776083A (en) * | 2016-12-14 | 2017-05-31 | 广东欧珀移动通信有限公司 | test control method, device and terminal device |
| CN108254174A (en) * | 2018-02-01 | 2018-07-06 | 中国航空综合技术研究所 | Sealing element degradation system and method |
| CN109282944A (en) * | 2018-10-29 | 2019-01-29 | 航天材料及工艺研究所 | A kind of ultra-low temperature surroundings composite seal sealing reliability verification method |
| CN111828437A (en) * | 2020-06-19 | 2020-10-27 | 中国北方车辆研究所 | Clutch centrifugal oil pressure testing device capable of adjusting axial space |
| CN111999018A (en) * | 2020-08-07 | 2020-11-27 | 中国北方发动机研究所(天津) | Device and method for measuring high-temperature elasticity of sealing ring of turbocharger |
| CN112924094A (en) * | 2021-01-25 | 2021-06-08 | 清华大学 | Dynamic seal experimental equipment |
| CN113670602A (en) * | 2021-07-29 | 2021-11-19 | 西安交通大学 | Rotary dynamic seal loss testing device and method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106776083A (en) * | 2016-12-14 | 2017-05-31 | 广东欧珀移动通信有限公司 | test control method, device and terminal device |
| CN106776083B (en) * | 2016-12-14 | 2020-06-23 | Oppo广东移动通信有限公司 | Test control method and device and terminal equipment |
| CN108254174A (en) * | 2018-02-01 | 2018-07-06 | 中国航空综合技术研究所 | Sealing element degradation system and method |
| CN109282944A (en) * | 2018-10-29 | 2019-01-29 | 航天材料及工艺研究所 | A kind of ultra-low temperature surroundings composite seal sealing reliability verification method |
| CN109282944B (en) * | 2018-10-29 | 2020-08-14 | 航天材料及工艺研究所 | Method for verifying sealing reliability of composite sealing element in ultralow temperature environment |
| CN111828437A (en) * | 2020-06-19 | 2020-10-27 | 中国北方车辆研究所 | Clutch centrifugal oil pressure testing device capable of adjusting axial space |
| CN111828437B (en) * | 2020-06-19 | 2022-10-28 | 中国北方车辆研究所 | Clutch centrifugal oil pressure testing device capable of adjusting axial space |
| CN111999018A (en) * | 2020-08-07 | 2020-11-27 | 中国北方发动机研究所(天津) | Device and method for measuring high-temperature elasticity of sealing ring of turbocharger |
| CN112924094A (en) * | 2021-01-25 | 2021-06-08 | 清华大学 | Dynamic seal experimental equipment |
| CN113670602A (en) * | 2021-07-29 | 2021-11-19 | 西安交通大学 | Rotary dynamic seal loss testing device and method |
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Application publication date: 20130522 |