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Shaft temperature sensor used for rolling stock and manufacturing method thereof

A manufacturing method and technology of temperature sensor, which are applied to thermometers, instruments, thermometers and other directions using electrical/magnetic components directly sensitive to heat, can solve problems such as disadvantageous vehicle management personnel, critical driving safety, mastery, etc., to ensure vehicle operation. The effect of safety, prolonging service life and improving reliability

Inactive Publication Date: 2010-03-03
LOCOMOTIVE & CAR RES INST OF CHINA ACAD OF RAILWAY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them: the advantage of the temperature sensor for semiconductor temperature measurement is that it can obtain the temperature value, and then transmit it to the host computer through serial communication, so as to realize real-time temperature data collection, which is convenient for vehicle management personnel to observe and grasp the reference data of the wheel bearing during normal operation , it is also possible to judge the hidden danger of early failure of the wheel bearing through the bearing temperature change curve; but the disadvantage is that due to the complex temperature measurement principle, there are many faults, the communication with the host is easily disturbed, and there are many false alarms. If it does not work at a critical moment Or neglected by management personnel will endanger driving safety
The advantage of the temperature fuse is that the principle is simple, and the temperature exceeds the nominal fusing value, and it will be blown; but the disadvantage of the temperature fuse is that it cannot display the bearing temperature value during normal operation, and the user cannot understand the operating status of the bearing until a fault occurs that affects the train running. It is not conducive to the vehicle management personnel to grasp the relevant information, and once the temperature fuse is blown, the entire vehicle will stop running, which will cause huge economic losses
[0004] In addition, due to the strong vibration of the wheel bearing during the operation of the vehicle, whether it is an axle temperature sensor for semiconductor temperature measurement or a temperature fuse, the internal electrical components will be subject to strong vibrations, resulting in shortened service life. It endangers the driving safety and increases the maintenance cost for the safe operation of the locomotive

Method used

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  • Shaft temperature sensor used for rolling stock and manufacturing method thereof
  • Shaft temperature sensor used for rolling stock and manufacturing method thereof
  • Shaft temperature sensor used for rolling stock and manufacturing method thereof

Examples

Experimental program
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Embodiment approach 1

[0027] Such as figure 1 As shown, the present invention provides an axle temperature sensor for rolling stock, including a sensor housing 1. A temperature sensor 2 and a temperature fuse 3 are arranged in the sensor housing 1. The temperature sensor 2 displays the operating shaft of the locomotive When the temperature changes, the temperature fuse 3 is blown when the axle temperature is too high to ensure reliable failure alarms and safe locomotive operation.

[0028] In the present invention, the temperature sensor 2 can be a digital temperature sensor (such as the DS18B20 temperature sensor produced by Dallas Company), an analog temperature sensor, a semiconductor temperature sensor, a thermocouple temperature sensor, a thermistor temperature sensor, etc., a temperature fuse 3 Various types in the prior art can be used, such as the SM146A0 temperature fuse produced by NEC Japan Electric Company. Obviously, the melting temperature of the temperature fuse 3 is much lower than the ...

Embodiment approach 2

[0035] Such as Figure 3~10 As shown, another aspect of the present invention also provides a manufacturing method for manufacturing axle temperature sensors for rolling stock, including the following steps:

[0036] a) such as image 3 As shown, the sensor housing 1 is manufactured. The sensor housing 1 includes a main housing 12 with a cavity 11 and a cover 13. A main housing 12 may be in the shape of a stepped non-equal diameter including a large diameter section and a small diameter section. Cylinder, the corresponding chamber 11 includes a main body chamber 111 and a head chamber 112, the main housing 12 is provided with a thread 121 at the front and an opening 122 at the rear;

[0037] b) Place the shock-absorbing heat-conducting material 6, the temperature sensor 2 and the temperature fuse 3 in the chamber 11 of the main housing 12, so that the temperature sensor 2 and the temperature fuse 3 (and the circuit board 5) are embedded in the shock-absorbing heat conduction The in...

Embodiment approach 3

[0048] The principles and effects of this embodiment are the same as those of the second embodiment, and will not be repeated. The difference is that step b is different. Step b specifically includes: pouring a shock-absorbing thermal conductive material into the chamber of the sensor housing, and inserting the temperature sensor and temperature fuse into the shock-absorbing thermal conductive material before the shock-absorbing thermal conductive material is solidified , And ensure that it does not contact the inner wall surface of the sensor housing. In this embodiment, the temperature sensor 2, the temperature fuse 3 (and the circuit board 5) can also be embedded in the shock-absorbing heat-conducting material 6 to achieve shock-absorbing effect, and the drawings are no longer provided.

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Abstract

The invention discloses a shaft temperature sensor used for rolling stock, which comprises a sensor shell that is internally provided with a temperature sensor and a temperature fuse. The manufacturing method of the shaft temperature sensor used for rolling stock comprises the steps: a) manufacturing the sensor shell which comprises a main shell with a cavity and a cover body; b) putting damping and heat conducting material, the temperature sensor and the temperature fuse in the cavity of the main shell, and leading the temperature sensor and the temperature fuse to be embedded in the dampingand heat conducting material and not to be contacted with the inner wall surface of the sensor shell; and c) installing the cover body and leading the out going line out. The shaft temperature sensorused for rolling stock and manufactured by the method not only can display the shaft temperature change in locomotive running, but also can lead the fuse to be fused by high temperature and ensure reliable failure warning when the shaft temperature is overhigh; and the invention can buffer the strong vibration of the components in the sensor during the running process of the vehicle, improve the measurement reliability and service life of the sensor, and ensure the safe running of the vehicle.

Description

Technical field [0001] The present invention relates to a sensor and a manufacturing method thereof, in particular to an axle temperature sensor for rail vehicles such as EMUs, railway trains, light rails, subways, etc., and a manufacturing method thereof. Background technique [0002] It is very important to ensure the safe operation of rail vehicles such as EMUs, high-speed and quasi-high-speed passenger trains, freight trains, subways, and light rails. Among them, the temperature of vehicle wheel bearings is an important reference index among many indicators for measuring safety performance. At present, sensors are commonly used to give an over-temperature alarm when the axle temperature exceeds the allowable temperature value to ensure the safety of vehicle operation. [0003] Currently, the commonly used sensors include two types. One is the semiconductor temperature sensor used in China. The other is the temperature fuse used abroad in the introduction of EMUs. Among them:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/00G01K7/02G01K7/22
Inventor 王旭如李学锋
Owner LOCOMOTIVE & CAR RES INST OF CHINA ACAD OF RAILWAY SCI
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