ขอความช่วยเหลือค่ะ ข้อความด้านล่าง แปลเป็นภาษาไทยว่าอย่างไรคะ
SLIDING BEARINGS
Sliding bearings have many shapes and materials. The simplest shape is the journal (shaft) and sleeve pair as shown in Chapter 9. Thrust loads can also be carried on sliding bearings, but there must be tilting pads to capture lubricant. This choice has two effects. For economy again, crank shafts are often made of nodular cast iron, in which there are graphite nodules on the order of 0.001-inch diameter. One of the two sliding surfaces can be made of special materials to extend the conditions for survival of the bearing pair. The four major conditions for survival are:
1. Resistance to fatigue (where there is cyclic loading)
2. Resistance to corrosion (particularly due to acids from combustion)
3. Resistance to scoring (due to inadequate lubrication and high temperature)
4. Ability to embed a limited amount of hard contaminant.
There is no single best bearing material for all types of uses of bearings. . Much experience is required to select the best material. The manufacturers of bearing materials do specify the broad categories. For example, of the four qualities given above, the copper-based alloys are the poorest in resistance to corrosion in modern lubricants and with modern fuels; the aluminum alloys are the poorest in resistance to scoring; and the silver and aluminum alloys are poorest in embedding of contaminants.
ขอความช่วยเหลือค่ะ แปลภาษาอังกฤษค่ะ
SLIDING BEARINGS
Sliding bearings have many shapes and materials. The simplest shape is the journal (shaft) and sleeve pair as shown in Chapter 9. Thrust loads can also be carried on sliding bearings, but there must be tilting pads to capture lubricant. This choice has two effects. For economy again, crank shafts are often made of nodular cast iron, in which there are graphite nodules on the order of 0.001-inch diameter. One of the two sliding surfaces can be made of special materials to extend the conditions for survival of the bearing pair. The four major conditions for survival are:
1. Resistance to fatigue (where there is cyclic loading)
2. Resistance to corrosion (particularly due to acids from combustion)
3. Resistance to scoring (due to inadequate lubrication and high temperature)
4. Ability to embed a limited amount of hard contaminant.
There is no single best bearing material for all types of uses of bearings. . Much experience is required to select the best material. The manufacturers of bearing materials do specify the broad categories. For example, of the four qualities given above, the copper-based alloys are the poorest in resistance to corrosion in modern lubricants and with modern fuels; the aluminum alloys are the poorest in resistance to scoring; and the silver and aluminum alloys are poorest in embedding of contaminants.