Casting and renovation of the sliding bearing bush and bushing of the dryer. The difference between sliding bearing and rolling bearing: rolling bearing uses ball as medium to reduce resistance and support rotation; Sliding bearings rely on bearing pad clearance to reduce resistance and support rotation. The bearing bush and lining in the sliding bearing are directly matched with the journal Casting and refurbishment of Babbitt bearing bush and bushing of sliding bearing of cylinder dryer. The difference between sliding bearing and rolling bearing: rolling bearing uses ball as medium to reduce resistance and support rotation; Sliding bearings rely on bearing pad clearance to reduce resistance and support rotation. In the sliding bearing, the bearing bush and lining are directly used together with the journal, which have friction with each other, and also bear the action of alternating load and impact load. As the shaft is an important part of the machine, its manufacturing process is complex, its cost is high, and its replacement is difficult. In order to ensure that the journal is slightly worn, the hardness of the bearing bush should be much lower than that of the journal. If necessary, the worn bearing bush can be replaced and the shaft can continue to be used. [Performance]: sufficient compressive strength and fatigue resistance; Good friction reduction (small friction coefficient); Good lubricating oil reserve function; Good running in performance; Good thermal conductivity and corrosion resistance; Good process performance makes it easy to manufacture. If one material cannot meet the above performance requirements at the same time, the sliding bearing alloy can be cast on the bearing shell back shell of low-carbon steel or copper by casting to make a bimetallic bearing. Bearing alloy shall have both soft and hard properties: (1) soft matrix and uniformly distributed hard spots (2) soft spots are distributed on hard matrix. When the bearing is working, the soft part is worn and concave first, which can store lubricating oil and form a continuously distributed oil film. The hard part plays the role of supporting the journal. In this way, the actual contact area between the bearing and the journal is greatly reduced, so that the friction of the bearing is reduced. [Material]: (1) Tin based bearing alloy, which is based on tin and is composed of antimony, copper, nickel, cadmium and other elements. Its advantage is that it has good plasticity, thermal conductivity and corrosion resistance, and small friction coefficient and expansion coefficient. It is suitable for making high-speed bearing shells of important bearings, such as steam turbines, engines, compressors and other large machines. The disadvantages are low fatigue strength and low working temperature (no higher than 150 ℃). Common brands such as: zchsnsb11-6 zchsnsb8-8、zchsnsb8-4……。 Tin base babbitt alloy has good compliance, anti seizure, wear resistance, corrosion resistance, shock absorption, pressure resistance and good embedding performance. The composition is composed of tin, antimony, copper and lead. Tin and copper fuse to form an acicular body, and antimony and tin fuse to form a lens. If the dosage is reasonable and the temperature is appropriate, its structure is uniform and fine. The chemical composition of common tin base alloy zchsnsb11-6 is antimony 10-12% copper 5.5-6.5% tin allowance (2) lead base bearing alloy? It is an alloy mainly composed of lead, antimony, tin, copper, cadmium, calcium, silver, tellurium and other alloy elements. The strength, hardness, thermal conductivity and corrosion resistance of lead based bearing alloy are lower than those of tin based bearing alloy, and the friction coefficient is larger. It is suitable for manufacturing medium and low load bearing bush, such as mill, dryer, beater, cold rolling mill, railway vehicle bearing, etc. Babbitt alloy production and processing Henan Huachuang professional service for you
