tailieunhanh - Root Cause Failure Analysis Episode 6

Tham khảo tài liệu 'root cause failure analysis episode 6', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Suction Valve Discharge Valve on opposite side 2nd Stage Dipstick Connecting Rods installation A carefully planned and executed installation is extremely important and makes compressor operation and maintenance easier and safer. Key components of a compressor installation are location foundation and piping. Location The preferred location for any compressor is near the center of its load. However the choice often is influenced by the cost of supervision which can vary by location. The ongoing cost of supervision may be less expensive at a less-optimum location which can offset the cost of longer piping. A compressor always will give better more reliable service when enclosed in a building that protects it from cold dusty damp and corrosive conditions. In certain locations it may be economical to use a roof only but this is not recommended unless the weather is extremely mild. Even then it is crucial to prevent rain and wind-blown debris from entering the moving parts. Subjecting a compressor to adverse inlet conditions will dramatically reduce its reliability and significantly increase its maintenance requirements. Ventilation around a compressor is vital. On a motor-driven air-cooled unit the heat radiated to the surrounding air is at least 65 percent of the power input. On a water- Compressors 143 Figure 10-14 Opposed-piston compressor balances piston forces. jacketed unit with an aftercooler and outside receiver the heat radiated to the surrounding aừ may be 15 to 25 percent of the total energy input which still is a substantial amount of heat. Positive outside ventilation is recommended for any compressor room where the ambient temperature may exceed 104 F. Foundation Because of the alternating movement of pistons and other components reciprocating compressors often develop a shaking that alternates in direction. This force must be damped and contained by the mounting. The foundation also must support the weight load of the compressor and its driver. There are