Dough penetration prevention device of kneading machine

A dough penetration prevention device of a kneading machine comprises:

• a lip seal ring having a plurality of seal ring wings, which are integrally formed on s an inner circumferential surface of the lip seal ring and are fixed to a bearing housing, so as to prevent penetration of a dough, caused by steam pressure of a kneading container, into a main bearing in a bearing housing which is provided to assist rotation of a sleeve connected to a rotating shaft;
• a head seal body which is mounted on the sleeve in front of the bearing housing and is fixed by a fixing body, so as to supply steam at a pressure level equal to the pressure of the kneading container into an opposite gap (t) between an outer circumferential surface of the sleeve and the lip seal ring, in opposition to the steam pressure of the kneading container attempting to penetrate into a gap (t) between the seal ring wings of the lip seal ring and the outer circumferential surface of the sleeve;
• and
• a steam supply and discharge part which discharges condensed water, which is condensed by reacting with the steam of the kneading container, to the outside while supplying steam to an inner circumferential surface of the head seal body.