2020-10-08 03:57:54 1122
Friction is a common phenomenon in the actual production of hammer crushers. The hammer crusher is composed of many small parts. The work of the hammer crusher is completed by the interaction of these small parts. These components interact with each other to generate friction. It has become an inevitable event. The friction formed in the daily operation of the hammer crusher is the dry friction, boundary friction, fluid friction and mixed friction.
Boundary friction is defined here. Due to the physical and chemical interaction between the two friction surfaces and the metal surface, the metal surface will absorb a very thin layer called The oil film of the boundary film covers most of it, but because the boundary film is very thin and low in strength, there may still be direct contact between the convex peaks on the two surfaces. The state of lubrication in the boundary rub is called boundary lubrication. Its characteristic is due to the effect of the boundary film , The friction coefficient is greatly reduced, and the amount of wear is significantly reduced compared with the dry friction state, but it has not reached a good lubrication state.
Mixed friction is a kind of between boundary friction and fluid friction. The lubrication state of this kind of friction is called mixed lubrication. It is characterized by the direct contact of the convex peaks between the two surfaces, and the existence of a certain pressure of the lubricating oil film. The effect of mixed friction on wear is also between boundary friction and fluid friction.
The two surfaces are separated by a pressure continuous oil film of sufficient thickness. The friction that does not have direct contact with the surface peaks is called fluid friction, and its lubrication state is called fluid lubrication, that is, liquid Lubrication. It is characterized by low friction coefficient and friction force, and theoretically almost no wear, which is an ideal lubrication state. If fluid lubrication can be formed between the friction surfaces, the service life of the parts can be significantly extended.
Dry friction, boundary friction, fluid friction and mixed friction can be found on the jaw crushing body of a hammer crusher. What friction occurs in actual work depends on factors such as the operating state of your machine. They will Mutual changes at any time with different operating conditions.