CN103234650A - Method for measuring axle box bearing instant temperature of bullet train bogie - Google Patents
Method for measuring axle box bearing instant temperature of bullet train bogie Download PDFInfo
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- CN103234650A CN103234650A CN201310159004XA CN201310159004A CN103234650A CN 103234650 A CN103234650 A CN 103234650A CN 201310159004X A CN201310159004X A CN 201310159004XA CN 201310159004 A CN201310159004 A CN 201310159004A CN 103234650 A CN103234650 A CN 103234650A
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- film thermocouple
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Abstract
The invention relates to a method for measuring an axle box bearing instant temperature of a bullet train bogie, belonging to the technical field of measuring. The method for measuring the axle box bearing instant temperature of the bullet train bogie comprises the following steps of 1, simulating a bearing temperature number and selecting a measuring point; and 2, mounting a needle-like coaxial film thermal coupling of a temperature measuring device in the measuring point.
Description
Technical field
The present invention relates to a kind of motor train unit bogie axle axle box bearing transient temperature measuring method, belong to field of measuring technique.
Background technology
China's high ferro is in high-speed development period, and on January 9th, 2011, the CRH380BL of a new generation's " Harmony " EMU that China produces has been created the record of highest running speed 487.3km/h especially in Beijing-Shanghai express railway guide section running test.But, along with speed and the increase of quantity and the prolongation of service time of opening the operation high ferro, need the problem of further investigation also to increase gradually, wherein the relevant issues of axle temperature test are particularly outstanding.
China's high ferro motor train unit axle box bearing is double-row conical bearing, is the important component part of guaranteeing the motor train unit security of operation.Even bearing also can generate heat in the normal condition turning down, but it is too much to work as bearing inner oil shortage or grease, the roller damage of breaking, retainer wearing and tearing and inner ring break, and problems such as bearing corrosion all can cause the abnormal heating of bearing, cause axletree to produce and surpass the high hot of normal temperature, thereby the hot box accident takes place, if can not in time find and handle, will lead to great security incident, so, be to guarantee one of important means of train operating safety to measurement and the monitoring of bearing transient temperature.At present, measuring method about motor train unit truck journal box bearing temperature, mainly comprise: infrared axle temperature detection, sound equipment hot shaft detection system, digital temperature sensor and Compact Pt100 temperature collecting device etc., but these methods of measuring bearing temperature all are subject to environmental factor (as sunlight, environment temperature etc.) interference, and measuring accuracy is low, response speed is slow, along with improving constantly of rolling stock speed, existing bearing temperature monitoring method can't satisfy the monitoring demand of fast-changing bearing temperature.
Summary of the invention
The present invention is directed to the proposition of above problem, and develop a kind of motor train unit bogie axle axle box bearing transient temperature measuring method.
A kind of motor train unit bogie axle axle box bearing transient temperature measuring method; The selection of the Digital Simulation of first step bearing temperature and measurement point, second step was installed in measurement point to the coaxial film thermocouple of the needle-like of temperature measuring equipment.
The principle of the invention and beneficial effect: principle of the present invention is based on the principle of work of thermopair, the thermometric ultimate principle of thermopair is: the electrode A of the material of two kinds of different components and B form the closed-loop path, when there is thermograde in two ends, just have electric current in the loop and pass through, just exist electromotive force---thermopower E between the two ends this moment
AB, Seebeck effect that Here it is, and have
In the formula: S
AB(T)---the Seebeck coefficient of thermopair;
S
A(T)---the intrinsic pyroelecthc properties of electrode A, i.e. absolute thermoelectrical potential rate;
S
B(T)---the absolute thermoelectrical potential rate of electrode B;
θ---pyrometer fire-end temperature;
θ
0---thermocouple cold junction;
The response time that the invention has the beneficial effects as follows this measuring method can reach a millisecond rank, can realize measurement and the monitoring of bearing transient temperature.
Description of drawings
Fig. 1 (a) is the coaxial film thermocouple of needle-like of the present invention and axle box bearing mounting structure synoptic diagram.
Fig. 1 (b) is the coaxial film thermocouple cut-open view of needle-like.
Fig. 2 is gib screw sectional view of the present invention.
Fig. 3 is cold junction compensation of the present invention and signal conditioning circuit figure.
Fig. 4 is bearing realistic model figure of the present invention.
Fig. 5 is bearing temperature simulation result figure of the present invention.
Among the figure: 1. thermode one, 2. ceramic insulating layer, and 3. thermode two, 4. colloid 5. goes between one, 6. lead-in wire two, 7. insulation sleeve, 8.. thin film coating, 9. insulating heat-conductive pad, 10. bearing, 11. gib screws, 12. cold junction compensations and signal condition module, 13. the train control system computing machine, 14. fluid sealants, the coaxial film thermocouple of 15. needle-likes, 16.. dead eye, 17. through holes one, 18. through holes two.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing:
A kind of motor train unit bogie axle axle box bearing transient temperature measuring method; The selection of the Digital Simulation of first step bearing temperature and measurement point, second step was installed in measurement point to the coaxial film thermocouple 15 of the needle-like of temperature measuring equipment.
The system of selection of the Digital Simulation of described first step bearing temperature and measurement point is as follows:
The first step utilizes the Pro/e 3 d modeling software to set up out the mathematical model of bogie axle axle box bearing, as shown in Figure 4;
Second step was utilized the ANSYS finite element analysis software, under the prerequisite of not impact analysis bearing temperature field distribution, simplify the mathematical model of bearing, heat of friction and convection transfer rate by calculating bearing simultaneously, determine at last to obtain the bearing temperature field pattern after boundary condition loads, as shown in Figure 5; Determine bearing temperature value peak according to described bearing temperature field pattern, thereby determine the installation site of the coaxial film thermocouple 15 of needle-like on bearing;
Described second step is installed in the measurement point installation method to the coaxial film thermocouple 15 of the needle-like of temperature measuring equipment and is: according to the installation site of the coaxial film thermocouple 15 of described needle-like on bearing, predetermined installation site on bearing 10 utilizes spot-facer open-blind hole 16 and produces the screw thread of slip-off preventing, insulating heat-conductive pad 9 and the coaxial film thermocouple 15 of needle-like are put into the hole, screw in gib screw 11, as shown in Figure 2, play the effect of fixing described insulating heat-conductive pad 9 and the coaxial film thermocouple 15 of described needle-like, wherein the coaxial film thermocouple 15 of needle-like and described gib screw adopt interference fit.The lead-in wire 1 of the coaxial film thermocouple 15 of described needle-like and going between 26 is drawn by the shoulder hole 17 and 18 on the described gib screw 11, in through hole 2 18 and dead eye 16, squeeze into fluid sealant 14 with glue beating apparatus afterwards, fluid sealant 14 solidifies and plays fixedly needle-like coaxial film thermocouple 15 sealing 16 holes after 12 hours and prevent the effect that gib screw 11 comes off, and goes between one 5 and go between 26 respectively in being fixed on fluid sealant; The coaxial film thermocouple 15 of needle-like is arranged in the outside wall surface of bearing outer ring.
Temperature measuring equipment comprises the coaxial film thermocouple 15 of needle-like and cold junction compensation and signal condition module 12, train control system computing machine 13; The coaxial film thermocouple 15 of needle-like connects cold junction compensation and signal condition module 12, and cold junction compensation is connected train control system computing machine 13 with signal condition module 12; Cold junction compensation and signal condition module 12 are in order to handle the ultra-weak electronic signal that the coaxial film thermocouple 15 of described needle-like produces, make it to satisfy the collection of vehicle-mounted train control system computing machine 13, the signal after handling by cold junction compensation and signal condition module 12 is delivered to gather in the vehicle-mounted train control system computing machine 13 and is shown.
Adopt the LT1025 chip as shown in Figure 3, signal amplifying part divides employing precision amplifier AD524 to realize.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, all should be encompassed within protection scope of the present invention.
Claims (4)
1. motor train unit bogie axle axle box bearing transient temperature measuring method is characterized in that: the selection of the Digital Simulation of first step bearing temperature and measurement point, second step was installed in measurement point to the coaxial film thermocouple of the needle-like of temperature measuring equipment (15).
2. a kind of motor train unit bogie axle axle box bearing transient temperature measuring method according to claim 1 is characterized in that:
The system of selection of the Digital Simulation of described first step bearing temperature and measurement point is as follows:
The first step utilizes the Pro/e 3 d modeling software to set up out the mathematical model of bogie axle axle box bearing,
Second step was utilized the ANSYS finite element analysis software, under the prerequisite of not impact analysis bearing temperature field distribution, simplify the mathematical model of bearing, heat of friction and convection transfer rate by calculating bearing simultaneously, determine at last to obtain the bearing temperature field pattern after boundary condition loads, determine bearing temperature value peak according to described bearing temperature field pattern, thereby determine the installation site of the coaxial film thermocouple of needle-like (15) on bearing.
3. a kind of motor train unit bogie axle axle box bearing transient temperature measuring method according to claim 1 is characterized in that:
Described second step is installed in the measurement point installation method to the coaxial film thermocouple of the needle-like of temperature measuring equipment (15) and is: according to the installation site of the coaxial film thermocouple of described needle-like (15) on bearing, predetermined installation site on bearing (10) utilizes spot-facer open-blind hole (16) and produces the screw thread of slip-off preventing, insulating heat-conductive pad (9) and the coaxial film thermocouple of needle-like (15) are put into the hole, screw in gib screw (11) and play the effect of fixing described insulating heat-conductive pad (9) and the coaxial film thermocouple of described needle-like (15), wherein the coaxial film thermocouple of needle-like (15) and described gib screw adopt interference fit; The lead-in wire one (5) of the coaxial film thermocouple of described needle-like (15) and going between two (6) is drawn by the through hole one (17) on the described gib screw (11) and through hole two (18), use glue beating apparatus in through hole two (18) and dead eye (16), to squeeze into fluid sealant (14) afterwards, fluid sealant (14) solidifies and to play fixedly the coaxial film thermocouple of needle-like (15) sealing dead eye (16) after 12 hours and to prevent the effect that gib screw (11) comes off, and goes between one (5) and go between two (6) respectively in being fixed on fluid sealant; The coaxial film thermocouple of needle-like (15) is arranged in the outside wall surface of bearing outer ring.
4. a kind of motor train unit bogie axle axle box bearing transient temperature measuring method according to claim 1, it is characterized in that: temperature measuring equipment comprises the coaxial film thermocouple of needle-like (15) and cold junction compensation and signal condition module (12), train control system computing machine (13); The coaxial film thermocouple of needle-like (15) connects signal condition module (12), and signal condition module (12) connects train control system computing machine (13); Film thermocouple cold junction compensation and signal condition module are in order to handle the ultra-weak electronic signal that the coaxial film thermocouple of described needle-like (15) produces, make it to satisfy the collection of vehicle-mounted train control system computing machine (13), the signal after handling by cold junction compensation and signal condition module (12) is delivered to gather in the vehicle-mounted train control system computing machine (13) and is shown.
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| CN201310159004.XA CN103234650B (en) | 2013-05-02 | 2013-05-02 | A kind of motor train unit bogie axle box bearing transient temperature measuring method |
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| CN201310159004.XA CN103234650B (en) | 2013-05-02 | 2013-05-02 | A kind of motor train unit bogie axle box bearing transient temperature measuring method |
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| CN103234650A true CN103234650A (en) | 2013-08-07 |
| CN103234650B CN103234650B (en) | 2016-03-16 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987768A (en) * | 2015-03-23 | 2016-10-05 | 韩华泰科株式会社 | Cable installation structure for temperature sensor |
| CN107462428A (en) * | 2017-06-27 | 2017-12-12 | 中车青岛四方机车车辆股份有限公司 | Temperature compensation and temperature compensation means |
| CN107514428A (en) * | 2017-10-24 | 2017-12-26 | 无锡民联汽车零部件有限公司 | The large size bearing of insertion-type thermocouple thermometric |
| CN107631813A (en) * | 2017-09-28 | 2018-01-26 | 株洲电力机车电机修造有限公司 | A kind of axle temperature detector |
| CN114136474A (en) * | 2021-11-19 | 2022-03-04 | 大连交通大学 | Self-adaptive thin-film thermocouple sensor for measuring transient roller temperature of railway bearing |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987768A (en) * | 2015-03-23 | 2016-10-05 | 韩华泰科株式会社 | Cable installation structure for temperature sensor |
| CN105987768B (en) * | 2015-03-23 | 2019-10-25 | 韩华压缩机株式会社 | Temperature sensor cable setting structure body |
| CN107462428A (en) * | 2017-06-27 | 2017-12-12 | 中车青岛四方机车车辆股份有限公司 | Temperature compensation and temperature compensation means |
| CN107631813A (en) * | 2017-09-28 | 2018-01-26 | 株洲电力机车电机修造有限公司 | A kind of axle temperature detector |
| CN107514428A (en) * | 2017-10-24 | 2017-12-26 | 无锡民联汽车零部件有限公司 | The large size bearing of insertion-type thermocouple thermometric |
| CN114136474A (en) * | 2021-11-19 | 2022-03-04 | 大连交通大学 | Self-adaptive thin-film thermocouple sensor for measuring transient roller temperature of railway bearing |
| CN114136474B (en) * | 2021-11-19 | 2023-10-20 | 大连交通大学 | Self-adaptive film thermocouple sensor for measuring transient roller temperature of railway bearing |
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| CN103234650B (en) | 2016-03-16 |
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