Temperature rise simulation method for sliding friction, combination and separation processes of wet clutch

Abstract

The invention provides a temperature rise simulation method for sliding friction, combination and separation processes of a wet clutch. The method comprises the following steps: establishing a single friction pair geometric model of the wet clutch; establishing a computational fluid dynamics simulation analysis grid for the geometric model of the single friction pair; dividing the sliding friction, combination and separation process of the wet clutch into multiple stages in the fluid dynamics simulation analysis grid, setting a first flow channel part state, a second flow channel part state, cooling flow separately applied to the first flow channel part and the second flow channel part and a surface heat source for each stage, and executing the multiple stages in a circulating mode; and carrying out temperature rise simulation analysis on the wet clutch by utilizing the computational fluid dynamics simulation analysis grid to respectively obtain curves of the maximum temperature and the average temperature of the steel sheet and the friction lining changing along with time. The problem that due to the fact that the flow given in the separation cooling stage of an existing clutch is insufficient, the temperature of the clutch is too high after frequent separation and combination circulation, and plate burning is possibly caused is solved.

Description

technical field [0001] The invention relates to the technical field of automobile simulation, in particular to a method for simulating temperature rise in wet clutch slipping, coupling and separation processes. Background technique [0002] The wet clutch is a key power transmission part in the vehicle power system, and its cooling and lubrication conditions are very critical, because during the clutch shift stage, sliding friction will occur between the clutch friction plate and the steel plate, if not properly lubricated, It will cause the clutch steel plate to turn blue, or even cause the clutch plate to burn and fail to transmit power. In the past, the amount of oil supplied to the clutch mainly depended on the experience of the clutch supplier. Generally speaking, more flow should be given during the clutch slipping phase. Taking a certain type of clutch plate as an example, the supplier suggested that the clutch should be supplied during the slipping phase. The amount...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for simulating the temperature rise of wet clutch slipping, engagement and disengagement process, which is used to solve the insufficient flow given in the disengagement and cooling stage of the existing clutch, which may lead to frequent disengagement and engagement cycles of the clutch. After the temperature is too high and the problem of burning the film

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