Inspection and repair of bearing
the damage of crankshaft bearing in use is mainly wear, fatigue peeling and burning. Bearing Seat Hole During engine overhaul, new bearings must be replaced. Before repairing the bearing, first check whether the bearing seat hole meets the requirements, and the roundness and cylindricity error of the bearing seat hole shall not be greater than 0.015mm.
The inspection and correction methods are as follows: clean the bearing seat, install the bearing cover, Bearing Seat Hole tighten the fixing bolts or nuts according to the specified torque, and check the roundness and cylindricity of the seat hole with the cylinder gauge. When the roundness and cylindricity exceed the regulations, it can be overlaid or padded at both ends of the bearing cover for adjustment, and it is not allowed to file the bearing cover.
Check the wear method of the bearing, Bearing Seat Hole clean the oil of the journal and bearing, cut the plastic wire gap gauge into the same length as the bearing width, and then place it on the crank pin to make it parallel to the shaft centerline. Carefully install the bearing cover, tighten the nut according to the specified torque, and then carefully remove the bearing cover. Use the measuring ruler printed on the plastic wire gap gauge packaging bag, Measure the width of the flattened plastic line width to obtain the gap value. If the limit value is exceeded, replace the bearing with a new one.
the commonly used bearing alloys of gasoline engine crankshaft bearings are Babbitt alloy and high tin aluminum alloy, Bearing Seat Hole and the thickness of alloy layer is 0.30 ~ 0.35mm. In addition to the standard size, the bearing specification also has the repair size of reducing the inner diameter by 0.25mm, which corresponds to the crankshaft journal for repair.
Water lubricated bearing Bearing Seat Hole is a kind of hardware accessories. I believe many people still have some understanding of the bearing. What is water lubricated bearing? What is the working principle of water lubricated bearing? What is water lubricated bearing?
Water lubricated bearings are divided into Bearing Seat Hole phenol bearings, rubber bearings, ceramic bearings, graphite bearings, PTFE and other polymer bearings. The bearing is used directly in water without any sealing device. The bearing is lubricated by water and does not need lubricating oil or grease, eliminating the harm of water pollution. Bearings are often used in flowing water, which can effectively control the bearing temperature rise, so as to have long service life, safety and reliability.
Structurally, Bearing Seat Hole it is suitable for horizontal axis, vertical axis and inclined axis. It is mainly used for large industrial water pumps, power plants, nuclear power plants, ships, water turbines, wind power generation, petrochemical industry, light chemical and food machinery, sewage treatment, waterworks, water conservancy pump stations, mining machinery and engineering machinery, valves, mixers and other fluid machinery.
Bearings with water Bearing Seat Hole as lubricant are generally sliding bearings. Babbitt alloy used in early water lubricated bearings has long been used in the field of ships, because water can provide hydrodynamic film under certain conditions. Water lubricated bearings are based on self-lubricating materials and combined with the lubricity of water under certain conditions, so as to be used in hydropower stations and other fields.
Water does not have Bearing Seat Hole the same high viscosity and lubricity as the recognized lubricant petroleum. Water does have limited viscosity and density, so it can provide hydrodynamic membrane. The research and development of superior water lubricated bearings will be based on materials and design, which should have good self sliding and excellent friction resistance.