TAILIEUCHUNG - Industrial Machinery Repair Part Episode 2 Part 1

Tham khảo tài liệu 'industrial machinery repair part episode 2 part 1', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 234 Couplings are used to contain the lubricant and seal out the entry of contaminants. The sleeves have lubrication holes which permit flushing and relubrication without disturbing the sleeve gasket or seals. Material-Flexing Couplings Material-flexing couplings are designed to be lubrication free. Combination Couplings Combination metallic-grid couplings are lubricated in the same manner as mechanical-flexing couplings. Periodic Inspections It is important to perform periodic inspections of all mechanical equipment and systems that incorporate rotating parts including couplings and clutches. Mechanical-Flexing Couplings To maintain coupling reliability mechanical-flexing couplings require periodic inspections on a time- or condition-based frequency established by the history of the equipment s coupling life or a schedule established by the predictive maintenance engineer. Items to be included in an inspection are listed below. If any of these items or conditions is discovered the coupling should be evaluated to determine its remaining operational life or repaired replaced. Inspect lubricant for traces of metal indicating component wear . Visually inspect coupling mechanical components roller chains and gear teeth and grid members for wear and or fatigue. Inspect seals to ensure they are pliable and in good condition. They must be installed properly in the sleeve with the lip in good contact with the hub. Sleeve flange gaskets must be whole in good condition clean and free of nicks or cracks. Lubrication plugs must be clean to prevent the introduction of contaminants to the lubricant and machine surfaces before being installed and must be torqued to the manufacturer s specifications. Couplings 235 Setscrews and retainers must be in place and tightened to manufacturer s specifications. Inspect shaft hubs keyways and keys for cracks breaks and physical damage. Under operating conditions perform thermographic scans to determine temperature differences on the coupling

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