Silicone oil fan clutch heat dissipation performance analysis method based on finite elements

Abstract

The invention discloses a silicone oil fan clutch heat dissipation performance analysis method based on finite elements. The method comprises: establishing and simplifying a three-dimensional structure model of a silicone oil fan clutch; according to a hydro-viscous transmission theory, calculating a heat generation rate and a shell heat dissipation rate when the silicone oil fan clutch works by applying theoretical knowledge, and reconstructing a silicone oil heat source; dividing grids by utilizing grid division software, and inputting physical parameters obtained by calculation; and simulating the silicone oil fan clutch model through fluid mechanics software, and carrying out post-processing on a calculation result so as to further analyze the heat dissipation performance of the silicone oil fan clutch. According to the method, the heat dissipation performance of the silicone oil fan clutch under different working conditions and the temperature condition of silicone oil can be accurately analyzed, so that a large amount of time required by an experiment is saved, and the problems of inaccurate temperature measurement in the experiment and the like are solved. And a theoreticalbasis is provided for structural improvement of the silicone oil fan clutch. The invention relates to the technical field of automobile part computer aided engineering.

Description

technical field [0001] The invention relates to the technical field of computer-aided engineering of auto parts, in particular to a method for analyzing the heat dissipation performance of a silicon oil fan clutch based on finite elements. Background technique [0002] As an important power transmission element in automobile cooling system, silicon oil fan clutch plays an important role in engine cooling performance. The silicone oil fan clutch is used as a hydraulic transmission part, and the heat dissipation process is a fluid-solid coupling system. During the working process, the temperature of the silicone oil increases due to the slip of the driving disc and the driven disc, which cuts the silicone oil, and the viscosity of the silicone oil decreases linearly with the increase of temperature, which reduces the torque transmission ability of the silicone oil fan clutch, resulting in the cooling of the entire fan. System efficiency is reduced. [0003] At present, there...

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Problems solved by technology

During the working process, the temperature of the silicone oil increases due to the slip of the driving disc and the driven disc, which cuts the silicone oil, and the viscosity of the silicone oil decreases linearly with the increase of temperature, which reduces the torque transmission ability of the silicone oil fan clutch, resulting in the cooling of the entire fan. Reduced system efficiency

[0003] At present, there are very few studies on the heat dissipation of silicone oil clutches. In China, temperature measuring instruments are mainly used to extract the surface temperature of silicone oil fan clutches. This method has certain disadvantages: 1. The speed of silicone oil fan clutches is too fast during operation, and it is impossible to measure the inside of the clutch Working temperature of silicone oil

2. In order to ensure the accuracy of the measurement results, repeated trials are usually required, which wastes a lot of work costs

[0004] The heat dissipation of the silicone oil fan clutch can be simulated by the finite element method, but the internal structure of the silicone oil fan clutch is complex, the establishment of the simulation model, the introduction of relevant parameters and other factors will have a great impact on the results, and the calculation model established in the current related research It is relatively simple, without considering the structure of the driving disc and shear groove inside the silicone oil fan clutch, the calculation result is not accurate

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