Method for determining degradation failure thresholds of abrasive particle characteristic parameters of vehicle power transmission device

Abstract

The invention belongs to the technical field of vehicle power transmission device research, and particularly relates to a method for determining degradation failure thresholds of abrasive particle characteristic parameters of a vehicle power transmission device. Compared with the prior art, the method has the advantages that failure thresholds of geometrical characteristic parameters of a key friction pair of the vehicle power transmission device are used as a basis, on the principle that a reliability evaluation result of degradation data of the abrasive particle characteristic parameters isequal to a reliability evaluation result of degradation data of the geometric characteristic parameters, reasonable estimation of the degradation failure thresholds of the abrasive particle characteristic parameters is achieved, and a basis is provided for high-precision failure analysis, state evaluation and fault detection of the vehicle power transmission device.

Description

technical field [0001] The invention belongs to the technical field of research on vehicle power transmission devices, and in particular relates to a method for determining the degradation failure threshold of wear particle characteristic parameters of vehicle power transmission devices. Background technique [0002] The wear particle characteristic parameter degradation failure threshold is the value of the wear particle characteristic parameter when the friction pair in the vehicle power transmission enters the accelerated wear stage from the stable wear stage. When a certain wear particle characteristic parameter reaches its failure threshold, the failure of the vehicle power transmission The rate will increase significantly, or the durability limit will be reached quickly, and it is not suitable for continued use. The wear particle characteristic parameter degradation failure threshold is an important basis for the failure analysis of the vehicle power transmission, and ...

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Problems solved by technology

[0004] The degradation data of the geometric characteristic parameters of the key friction pair can be obtained by dismantling and inspecting the power transmission device, and its failure threshold can be obtained by analyzing the design value. Decompose it and measure the change value of the geometric characteristic parameters of the key friction pairs inside the device one by one. This process requires a lot of manpower, material resources and financial resources. At present, a dismantling inspection is usually carried out after the vehicle has driven 6000km, which is not suitable for power transmission. Device real-time status assessment

[0005] The degradation data of the characteristic parameters of oil wear particles can be obtained through the detection of oil samples collected from the oil delivery port of the power transmission device. There is no clear design value for the failure threshold of the parameter. At present, when determining the failure threshold of the abrasive particle characteristic parameters such as the concentration of metal elements in the lubricating oil and the wear intensity, it mainly depends on the engineering experience of the designer. However, different types of vehicle power In addition to the differences in the friction parts of the transmission device, the parameters and states of the lubricating oil system are also often different, and the influence of oil filters at all levels is very complicated. Fully consider the impact of structural differences, oil filtration, working environment and other factors, the accuracy and reliability of the analysis results are low

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