Method and device for estimating the temperature of an axle bearing of a wheelset of a rail vehicle
A technology of wheel sets and bearings, which is applied to rotating bearings, braking action starting devices, signal indicators on vehicles, etc., and can solve the problems of difficult installation in the structure and the laying cost of mechanical connection cables for temperature sensors, etc.
Active Publication Date: 2012-07-18
KNORR BREMSE SYST FUR SCHIENENFAHRZEUGE GMBH
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Problems solved by technology
However, according to the invention, the highest temperatures occur in the load area of the wheel bearing, i.e. in the tangential direction of the outer bearing ring as seen from above, and mounting the temperature sensor directly thereon results in a temperature The mechanical connection of the sensor and its cable laying is a certain outlay, and due to the location, the installation is often structurally difficult, especially in combined bearings, e.g. in the case of double bearings, taking into account the situation of multiple load areas
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[0049] figure 1 A schematic view of a rail vehicle wheel set bearing 1 is shown in , wherein two wheels, not explicitly shown here, are arranged on the end side of the axle or shaft 2 of the wheel set. In this case, adjacent to the wheels, there is in each case a wheel bearing 1 which supports the shaft 2 on a bogie, also not shown here. The wheel bearing 1 is preferably a double bearing, ie there are two wheel bearings arranged axially one behind the other or one behind the other, for example in the form of two rolling bearings.
[0050] The following embodiments relate to a method and a device for estimating the temperature of a wheel bearing 1 by means of a calculation model. The calculation model for estimating the temperature of the wheel bearing 1 is based on the heat capacity of the wheel or parts of the wheel bearing 1 , the heat conduction in the wheels or parts of the wheel bearing 1 , the wheel or the wheel bearing 1 The heat transfer resistance between the compon...
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The invention relates to a method for estimating the temperature (T B, est) of a wheel bearing (1) of a wheelset of a rail vehicle by means of a calculation model (Tbearingestimator). According to said method, the calculation model (Tbearing,estimator) is designed to estimate the temperature of the axle bearing in question, according to the speed (vtrain) and the ambient temperature (Tamb) of the rail vehicle as input variables of the calculation model (T bearing estimator), and the temperature of a component (6) of the wheelset, different from the axle bearing (1) but directly or indirectly connected to the axle bearing in a heat-conducting manner, is measured as the measuring temperature (Tmeas) during operation. The temperature of the component (6) different from the axle bearing (1) is estimated by means of the calculation model (Tbearingestimator) as the estimated temperature (Tmeas,est). In order to improve the accuracy of the calculation model (Tbearingestimator) in terms of the estimation of the temperature (TB,est) of the axle bearing (1), the calculation model (Tbearingestimator) has a corrective element (Kb) that is used to continuously, temporarily or cyclically calibrate or adjust it on the basis of a comparison of the measuring temperature (Tmeas) with the estimated temperature (Tmeas,est).
Description
technical field [0001] The invention relates to a method and a device for using a calculation model according to the preambles of claims 1 and 6 and according to the preambles of claims 9 and 10 according to the The use of the temperature estimated by the method, estimates the temperature of the wheel bearings of the rail vehicle wheels. Background technique [0002] Today, more and more diagnostic and monitoring systems are used in rail vehicle traffic, by which changes in the state of rail vehicle components and assemblies are detected in order to detect damage to these components and assemblies. Especially for wheel sets of rail vehicles, the detection of damage in terms of overheating is of great interest. [0003] Modern high-speed trains are driven beyond their limits and must therefore comply with the corresponding standards to ensure interoperability, such as the 96 / 48 / EC guidelines. In addition, an on-board monitoring of the wheel bearings of the rail vehicle whee...
Claims
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IPC IPC(8): B61K9/04
CPCB61L15/0081B61K9/04B60L2200/26F16C19/525F16C2326/10B60T7/126
Inventor 拉尔夫·富特文勒乌尔夫·弗里森
Owner KNORR BREMSE SYST FUR SCHIENENFAHRZEUGE GMBH