What are the characteristics of the flywheel shell


Release time:

2022-07-25

The flywheel housing is a key component of the engine. It is connected to the engine through the gear chamber side and the transmission through the basin port side to realize the effective connection between the engine and the transmission. Through its changes, the same engine can be installed on different cars. Flywheel shell complex, porous system, thin-walled, shaped like a basin. Casting processing mainly includes the plane matching the gear chamber and its hole system, the basin mouth and the hole system on the side of the basin mouth, the plane around the basin structure and its hole system.

The flywheel housing is a key component of the engine. It is connected to the engine through the gear chamber side and the transmission through the basin port side to realize the effective connection between the engine and the transmission. Through its changes, the same engine can be installed on different cars. Flywheel shell complex, porous system, thin-walled, shaped like a basin. Casting processing mainly includes the plane matching the gear chamber and its hole system, the basin mouth and the hole system on the side of the basin mouth, the plane around the basin structure and its hole system.

飞轮壳

Use flywheel housing, Especially for front and rear driving heavy trucks, large and medium-sized buses, cracking of the flywheel housing is a common problem of automobile engines. There are many factors that lead to this failure, and the material is one of the important reasons. Due to the production process, the flywheel housing of the diesel engine is made of gray cast iron. The gray iron flywheel shell is damaged from time to time during use, and most of the damaged parts are in the same area. The analysis of the causes shows that, in addition to the reasons for use and maintenance, the strength of the flywheel housing is not high enough because of its material is an important reason. The ductile iron flywheel shell has not been widely used, mainly because of its low yield and pass rate of cast blanks.

flywheel housingThe manufacturer thinksThe non-riser casting of ductile iron is related to the casting characteristics, casting structure, gating system and other factors. Firstly, the characteristics of molten iron are analyzed. Because the molten iron is poured into the casting mold, it will shrink with the decrease of the temperature of the molten iron, which is called liquid shrinkage. If austenite is produced during solidification, solidification shrinkage will also occur; when graphite balls are precipitated in a liquid or solidified state, volume expansion will occur because the density of graphite is only about 1/3 of that of austenite. Therefore, from the static analysis, if the sum of the volume shrinkage of liquid cooling and solidification is less than the volume increase of graphitization expansion, the non-riser casting production of ductile iron parts can be realized.

flywheel housingThe manufacturer thinksPouring ductile iron with no riser process should be filled at low temperature and in a short time as far as possible, and the filling is stable. That is to say, low temperature, bottom injection and smooth filling are the basic conditions to ensure the quality of ductile iron flywheel shell castings, and the core of the design of the gating system is to control the filling speed of the inner runner.

flywheel housingThe manufacturer thinksIn view of the characteristics of ductile iron flywheel shell castings, such as complex structure, large wall thickness difference and easy to produce shrinkage defects, the chemical composition of molten iron is strictly controlled to improve the fluidity of molten iron and reduce the pouring temperature of castings. When bottoming, the molten iron is dispersed into the cavity. Four corners of the exhaust, fully exclude the cavity and the pouring process of the gas and other effective measures. The ductile iron flywheel housing castings for diesel engine were successfully produced. The non-riser process achieves a high process yield and product pass rate.

The above are some knowledge points about the flywheel shell. I hope you can seriously study and understand the relevant knowledge, choose the products and equipment suitable for your needs, and ensure your own benefits. If you want to know more details, you can contact us. I believe you can give you a satisfactory answer.