Lip-shaped sealing ring for automobile engine rotating shaft
A lip-shaped sealing ring, automobile engine technology, applied in the field of sealing materials, can solve the problems of short service life, high production cost, complex process, etc., to improve thermal conductivity and gas barrier properties, improve mechanical strength and wear resistance, Simple preparation method
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[0024] [Example 1]
[0025] A lip-shaped sealing ring for a rotating shaft of an automobile engine, wherein the lip-shaped sealing ring is composed of a fluororubber system, a melamine formaldehyde resin system and a graphene oxide system;
[0026] The fluororubber system includes the following components in parts by weight: 100 parts of fluororubber, 3.5 parts of diatomaceous earth, 10 parts of magnesium oxide, 2 parts of calcium hydroxide, 5 parts of carbon black, 1.5 parts of bisphenol AF, 0.5 parts of BPP ;
[0027] The melamine formaldehyde resin system includes the following components in parts by weight: 20 parts by weight of melamine, 10 parts by paraformaldehyde, 5 parts by weight 37% formaldehyde solution, 3 parts by cellulose sulfonate, and 6 parts by isoacetone;
[0028] The graphene oxide system includes the following components in parts by weight: 1 part of graphene oxide, 10 parts of coupling agent, 5 parts of 66.7% acetic acid solution, and 30 parts of methyl ethyl ket...
Example Embodiment
[0039] [Example 2]
[0040] A method for preparing a lip-shaped sealing ring for a rotating shaft of an automobile engine includes the following steps:
[0041] Step 1: Preparation of graphene oxide system
[0042] Take 40 parts of methyl ethyl ketone and 1.8 parts of graphene oxide, mix them uniformly by ultrasonic, then add 7 parts of formaldehyde solution with a mass fraction of 37% to the mixed solution, continue to mix evenly, and add 13 parts of coupling agent in an oil bath at 75°C Next, react for 10 hours, wash with deionized water and vacuum dry after the reaction to obtain processed graphene oxide;
[0043] Step 2: Preparation of melamine formaldehyde resin system
[0044] Take 25 parts of melamine and 15 parts of paraformaldehyde into the reactor, then add 40 parts of deionized water, heat up to 55 ℃ under stirring conditions, add 8 parts of 37% formaldehyde solution and use 20 % Sodium hydroxide solution adjust the pH value, control it at 8-9, then heat to 70℃, react for 1...
Example Embodiment
[0048] [Example 3]
[0049] A method for preparing a lip-shaped sealing ring for a rotating shaft of an automobile engine includes the following steps:
[0050] Step 1: Preparation of graphene oxide system
[0051] Take 50 parts of methyl ethyl ketone and 1.5 parts of graphene oxide, mix them uniformly by ultrasonic, then add 10 parts of formaldehyde solution with a mass fraction of 37% to the mixture, continue to mix evenly, add 20 parts of coupling agent, in an oil bath at 75°C After reacting for 12 hours, washing with deionized water and drying in vacuum after the reaction, the processed graphene oxide is obtained;
[0052] Step 2: Preparation of melamine formaldehyde resin system
[0053] Take 30 parts of melamine and 18 parts of paraformaldehyde into the reactor, then add 50 parts of deionized water, heat to 55℃ under stirring conditions, add 10 parts of 37% formaldehyde solution and use 20 % Sodium hydroxide solution adjust the pH value, control it at 8-9, then heat to 70℃, reac...
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