CN103234650B - A kind of motor train unit bogie axle box bearing transient temperature measuring method - Google Patents
A kind of motor train unit bogie axle box bearing transient temperature measuring method Download PDFInfo
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- CN103234650B CN103234650B CN201310159004.XA CN201310159004A CN103234650B CN 103234650 B CN103234650 B CN 103234650B CN 201310159004 A CN201310159004 A CN 201310159004A CN 103234650 B CN103234650 B CN 103234650B
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- film thermocouple
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Abstract
The present invention relates to a kind of motor train unit bogie axle box bearing transient temperature measuring method, belong to field of measuring technique.A kind of motor train unit bogie axle box bearing transient temperature measuring method; The selection of the Digital Simulation of first step bearing temperature and measurement point, second step is arranged on measurement point the needle-like coaxial thin-film thermocouple of temperature measuring equipment.
Description
Technical field
The present invention relates to a kind of motor train unit bogie 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, on January 9th, 2011, and a new generation's " Harmony " CRH380BL EMU of domestic product creates the record of highest running speed 487.3km/h especially in Beijing-Shanghai express railway guide section running test.But along with opening the operation speed of high ferro and the prolongation of the increase of quantity and service time, 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 guaranteeing motor train unit security of operation.Also can generate heat even if bearing turns round in normal state, but when bearing inner oil shortage or grease too much, roller crack damage, retainer wearing and tearing and inner ring break, and the problems such as bearing corrosion all can cause the abnormal heating of bearing, axletree generation is caused to exceed the high heat of normal temperature, thus there is hot box accident, if can not Timeliness coverage and process, great security incident will be led to, so, be one of important means ensureing train operating safety to the measurement and monitoring of bearing transient temperature.At present, about the measuring method of motor train unit bogie axle box bearing temperature, mainly comprise: infrared axle temperature detection, sound equipment hot shaft detection system, digital temperature sensor and CompactPt100 temperature collecting device etc., but these methods measuring bearing temperature are all 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 cannot meet 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 box bearing transient temperature measuring method.
A kind of motor train unit bogie axle box bearing transient temperature measuring method; The selection of the Digital Simulation of first step bearing temperature and measurement point, second step is arranged on measurement point the needle-like coaxial thin-film thermocouple of temperature measuring equipment.
The principle of the invention and beneficial effect: principle of the present invention is the principle of work based on thermopair, the thermometric ultimate principle of thermopair is: the electrode A of the material of two kinds of different components and B form closed-loop path, when there is thermograde in two ends, just have electric current in loop to pass through, now just there is electromotive force between two ends---thermopower E
aB, Seebeck effect that Here it is, and have
In formula: S
aB(T)---the Seebeck coefficient of thermopair;
S
a(T)---the intrinsic pyroelecthc properties of electrode A, i.e. absolute thermoelectric powers rate;
S
b(T)---the absolute thermoelectric powers rate of electrode B;
θ---pyrometer fire-end temperature;
θ
0---thermocouple cold junction;
The invention has the beneficial effects as follows that the response time of this measuring method can reach a millisecond rank, measurement and the monitoring of bearing transient temperature can be realized.
Accompanying drawing explanation
Fig. 1 (a) is needle-like coaxial thin-film thermocouple of the present invention and axle box bearing mounting structure schematic diagram.
Fig. 1 (b) is needle-like coaxial thin-film thermocouple cut-open view.
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.
In figure: 1. thermode one, 2. ceramic insulating layer, 3. thermode two, 4. colloid, 5. goes between one, 6. goes between two, 7. insulation sleeve, 8.. thin film coating, 9. insulating heat-conductive pad, 10. bearing, 11. gib screws, 12. cold junction compensations and Signal-regulated kinase, 13. train control system computing machines, 14. fluid sealants, 15. needle-like coaxial thin-film thermocouple, 16.. dead eye, 17. through hole one, 18. through holes two.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described:
A kind of motor train unit bogie axle box bearing transient temperature measuring method; The selection of the Digital Simulation of first step bearing temperature and measurement point, second step is arranged on measurement point the needle-like coaxial thin-film thermocouple 15 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 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 utilizes ANSYS finite element analysis software, under the prerequisite of not impact analysis bearing temperature field distribution, simplify the mathematical model of bearing, simultaneously by calculating heat of friction and the convection transfer rate of bearing, finally determine that boundary condition obtains bearing temperature field pattern after loading, as shown in Figure 5; According to described bearing temperature field pattern determination bearing temperature value peak, thus determine the installation site of needle-like coaxial thin-film thermocouple 15 on bearing;
Described second step is arranged on measurement point installation method the needle-like coaxial thin-film thermocouple 15 of temperature measuring equipment: according to the described installation site of needle-like coaxial thin-film thermocouple 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 needle-like coaxial thin-film thermocouple 15 are put into hole, screw in gib screw 11, as shown in Figure 2, play the effect of fixing described insulating heat-conductive pad 9 and described needle-like coaxial thin-film thermocouple 15, wherein needle-like coaxial thin-film thermocouple 15 and described gib screw adopt interference fit.Lead-in wire 1 and the lead-in wire 26 of described needle-like coaxial thin-film thermocouple 15 are drawn by the shoulder hole 17 and 18 on described gib screw 11, in through hole 2 18 and dead eye 16, fluid sealant 14 is squeezed into afterwards with glue beating apparatus, fluid sealant 14 plays the effect that fixing needle-like coaxial thin-film thermocouple 15 is closed 16 holes and prevented gib screw 11 from coming off after solidifying 12 hours, lead-in wire 1 and lead-in wire 26 are being fixed in fluid sealant respectively; Needle-like coaxial thin-film thermocouple 15 is arranged in the outside wall surface of bearing outer ring.
Temperature measuring equipment comprises needle-like coaxial thin-film thermocouple 15 and cold junction compensation and Signal-regulated kinase 12, train control system computing machine 13; Needle-like coaxial thin-film thermocouple 15 connects cold junction compensation and Signal-regulated kinase 12, cold junction compensation and Signal-regulated kinase 12 connecting column Ore-controlling Role computing machine 13; Cold junction compensation and Signal-regulated kinase 12 are the ultra-weak electronic signals produced to process described needle-like coaxial thin-film thermocouple 15, make it the collection meeting vehicle-mounted train control system computing machine 13, deliver to collection display in vehicle-mounted train control system computing machine 13 by the signal after cold junction compensation and Signal-regulated kinase 12 process.
Adopt LT1025 chip as shown in Figure 3, signal amplifying part divides employing precision amplifier AD524 to realize.
The above; be only the present invention's preferably embodiment; 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 according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (2)
1. a motor train unit bogie 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 is arranged on measurement point the needle-like coaxial thin-film thermocouple of temperature measuring equipment (15);
Described second step is arranged on measurement point installation method the needle-like coaxial thin-film thermocouple of temperature measuring equipment (15): according to described needle-like coaxial thin-film thermocouple (15) installation site on bearing, predetermined installation site on bearing (10) utilizes spot-facer to open dead eye (16) and produces the screw thread of slip-off preventing, insulating heat-conductive pad (9) and needle-like coaxial thin-film thermocouple (15) are put into hole, screw in the effect that gib screw (11) plays fixing described insulating heat-conductive pad (9) and described needle-like coaxial thin-film thermocouple (15), wherein needle-like coaxial thin-film thermocouple (15) and described gib screw adopt interference fit, the lead-in wire one (5) of described needle-like coaxial thin-film thermocouple (15) and lead-in wire two (6) are drawn by the through hole one (17) on described gib screw (11) and through hole two (18), glue beating apparatus is used to squeeze into fluid sealant (14) afterwards in through hole two (18) and dead eye (16), the effect that fixing needle-like coaxial thin-film thermocouple (15) is closed dead eye (16) and prevented gib screw (11) from coming off is played in fluid sealant (14) solidification after 12 hours, lead-in wire one (5) and lead-in wire two (6) are being fixed in fluid sealant respectively, needle-like coaxial thin-film thermocouple (15) is arranged in the outside wall surface of bearing outer ring.
2. a kind of motor train unit bogie axle box bearing transient temperature measuring method according to claim 1, it is characterized in that: temperature measuring equipment comprises needle-like coaxial thin-film thermocouple (15) and cold junction compensation and Signal-regulated kinase (12), train control system computing machine (13); Needle-like coaxial thin-film thermocouple (15) connection signal conditioning module (12), Signal-regulated kinase (12) connecting column Ore-controlling Role computing machine (13); Film thermocouple cold junction compensation and Signal-regulated kinase are the ultra-weak electronic signals produced to process described needle-like coaxial thin-film thermocouple (15), make it the collection meeting vehicle-mounted train control system computing machine (13), delivered in vehicle-mounted train control system computing machine (13) by the signal after cold junction compensation and Signal-regulated kinase (12) process and gather display.
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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 CN103234650A (en) | 2013-08-07 |
| CN103234650B true CN103234650B (en) | 2016-03-16 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102247595B1 (en) * | 2015-03-23 | 2021-05-03 | 한화파워시스템 주식회사 | Installation structure for temperature sensor cable |
| 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 |
| 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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| US3937429A (en) * | 1974-05-20 | 1976-02-10 | Westinghouse Air Brake Company | Apparatus for detecting hot journal boxes |
| CN102103023A (en) * | 2009-12-17 | 2011-06-22 | 中国航空工业集团公司沈阳发动机设计研究所 | Device capable of measuring surface temperature of inner wall of rolling bearing |
| CN102853930A (en) * | 2012-08-24 | 2013-01-02 | 大连交通大学 | Transient temperature measuring system for diesel engine piston and measuring method thereof |
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2013
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|---|---|---|---|---|
| US3937429A (en) * | 1974-05-20 | 1976-02-10 | Westinghouse Air Brake Company | Apparatus for detecting hot journal boxes |
| CN102103023A (en) * | 2009-12-17 | 2011-06-22 | 中国航空工业集团公司沈阳发动机设计研究所 | Device capable of measuring surface temperature of inner wall of rolling bearing |
| CN102853930A (en) * | 2012-08-24 | 2013-01-02 | 大连交通大学 | Transient temperature measuring system for diesel engine piston and measuring method thereof |
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| 滚动轴承的温度场和热变形分析;徐建宁等;《轴承》;20061231(第5期);第1-3页 * |
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| 轧机用特大型滚动轴承温度场及其生热率的仿真分析;李军红;《中国优秀硕士学位论文全文数据库 工程科技II辑》;20130415(第4期);第39-41页 * |
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