An intelligent detection method for foundation braking based on displacement and force values

Abstract

The invention discloses a basic brake intelligent detecting method based on displacement and force magnitude. The basic brake comprises a brake unit which is provided with an inflating port, a displacement sensor and a connecting rod assembly, wherein the displacement sensor and the connecting rod assembly are arranged in the brake unit. The connecting rod assembly is provided with a force magnitude sensor which detects a bearing pressure. An air inflating or discharging action is performed on the brake unit. The displacement sensor detects a telescoping displacement and a retreating displacement of the connecting rod assembly. The force magnitude sensor performs real-time detection and synchronously acquires an output force magnitude of the connecting rod assembly, acquires the telescoping displacement and the retreating displacement according to the change rate of the output force magnitude, and determines whether a braking action stroke satisfies a routine testing program effect stroke requirement. According to the basic brake intelligent detecting method, by means of the force bearing and the displacement of the connecting rod assembly are detected by means of the displacementsensor and the force magnitude sensor, thereby realizing online detection for brake shoe abrasion and braking action stroke. The basic brake intelligent detecting method can satisfy a requirement of train operation in an adverse working condition and realizes online detection for a train brake plate abrasion condition and the action stroke.

Description

technical field [0001] The invention relates to the technical field of railway locomotive foundation braking, in particular to an on-line detection method for brake shoe (brake pad) wear and braking action stroke of a foundation brake unit of a railway vehicle. Background technique [0002] With the continuous speed increase of railway locomotives in our country, the requirements of rolling stock for vehicle safety are also getting higher and higher. The basic braking unit of the railway locomotive is an important part to ensure the safety of the vehicle. When the locomotive brakes, the mechanical friction between the basic braking unit brake shoe (brake pad) and the wheel set generates a braking force, which is used to ensure the emergency braking of the train. It can stop within the specified braking distance. [0003] At present, there are mainly two types of basic braking devices: brake caliper unit and tread brake unit; the brake caliper unit forms the brake cylinder, ...

AI Technical Summary

Problems solved by technology

This invention has the following problems: 1. In this invention, the moving end of the displacement sensor is fixed on the connecting shaft between the brake shoe support rod and the brake shoe support. Since the output shaft of the tread brake unit does not move linearly along the horizontal axis when it is stretched out, It is actually a deflection movement, so there is a large error in the comparison between the above patent measurement and the actual wear value of the brake pad; 2. According to the basic braking principle, the above invention only needs one sensor to realize its function (see the function realization part for details); 3. .Because the sensor is installed outside the brake unit without protection, and the operating condition of the bogie is relatively harsh during the actual train operation, there are multi-dimensional vibrations and shocks

Atmospheric dust, powder produced by brake shoe wear, rain and snow, etc. will affect the life and accuracy of the sensor, and ultimately affect the wear detection of the brake shoe

4. The above-mentioned invention is externally installed with a displacement sensor, and the tread brake unit needs to be processed; 5. The above-mentioned patent is only applicable to the tread brake unit, and the structure of the brake caliper unit is not applicable

[0005] To sum up, the patent published in the patent document CN103171588B does not have the conditions for real vehicle operation monitoring, and it is still necessary to design and invent a new type of basic braking intelligent detection device and method, which has high detection accuracy and is compatible with the tread braking unit and the braking system. Clamp unit, and suitable for real vehicle running conditions

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