Analysis method of heat dissipation performance of silicon oil fan clutch based on finite element

Abstract

The invention discloses a method for analyzing the heat dissipation performance of a silicone oil fan clutch based on a finite element. The method establishes a three-dimensional structural model of the silicone oil fan clutch and simplifies it; according to the theory of hydro-viscous transmission, the heat generation rate of the silicone oil fan clutch when working is calculated by using theoretical knowledge and the heat dissipation rate of the casing, and reconstruct the heat source of the silicone oil; use the meshing software to divide the mesh, and input the calculated physical parameters; then simulate the silicone oil fan clutch model through the fluid mechanics software, and analyze the calculation results. processing to further analyze the heat dissipation performance of the silicone oil fan clutch. The method can accurately analyze the heat dissipation performance of the silicone oil fan clutch and the temperature of the silicone oil under different working conditions, thereby saving a lot of time required for the experiment and solving the problems of inaccurate temperature measurement in the experiment. The theoretical basis is provided for the structural improvement of the silicone oil fan clutch. The invention relates to the technical field of computer aided engineering of automobile parts.

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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