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www.idcon.com ©2023 IDCON, INC. CMS 209 Page 1 of 4 919-847-8764 Do Not Copy Conveyor, Screw, Closed CMS209 Condition Monitoring Standards Basic Principle A closed screw conveyor uses a motor to rotate a shaft with a screw, pushing material as the screw rotates. Screw conveyors can operate horizontally, vertically, or at an angle.
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www.idcon.com ©2023 IDCON, INC. CMS 209 Page 2 of 4 919-847-8764 Do Not Copy OPERATIONAL KEY WHAT WHY Frame Inspect the frame, base and foundation for damage and excessive corrosion. • In concrete foundations, inspect for cracks, erosion, and unevenness. • On a steel base, inspect for corrosions and cracks. Corrosion does not necessarily appear as rust. Properly drain process fluids, slurry, water, or seal water away from the foundation and base. Foundation and base should be clean and dry. A damaged base and/or foundation will cause misalignment and vibration. Bolts & Fasteners Check that all mounting bolts and anchor bolts are tight and free from corrosion. A corroded bolt is a loose bolt, or it will become loose soon. Make sure washers and bolts are made of the same material or combinations of material. If a loose mounting bolt is found, make a note, tighten at next downtime opportunity, and then recheck alignment. Loose mounting bolts will gradually cause misalignment. Two dissimilar metals will corrode when put together. Tightening a bolt may pull equipment out of alignment. Trough Inspect trough of conveyor for corrosion. Inspect outer shell for any damage or leaks. Check the mating surfaces, making sure no product is leaking from the gasket surfaces and that there are no holes in the outer shell. Reference CMS 133 or 134 for information on seals or packing. Excessive corrosion and leaks can cause a sudden failure of structural components.
www.idcon.com ©2023 IDCON, INC. CMS 209 Page 3 of 4 919-847-8764 Do Not Copy KEY WHAT WHY Noise Check for any unusual noise from the screw conveyor. Listen for scraping or clicking. Unusual noise or vibration can be an indication that there is misalignment or broken parts in the screw conveyor or that the bearings do not have enough lubricant. Scraping sounds may indicate that the screw is contacting the housing. Clicking sounds may be an indication of loose fasteners or misalignment. Detailed Cleaning Inspect cleanliness of screw conveyor exterior, inlet, and outlet to allow maintenance checks to be done accurately. Picture courtesy: powderbulksolids.com Keeping the screw conveyor exterior clean will allow maintenance checks to be done faster and more effectively. Vibration Measure vibration of bearing housings with vibration pen. Increased levels of vibration can indicate bearing failure or other problems. Temperature Measure temperature of bearing housings with IR temperature gun. Increased temperature can indicate impending bearing failure or misalignment.
www.idcon.com ©2023 IDCON, INC. CMS 209 Page 4 of 4 919-847-8764 Do Not Copy STOPPED KEY WHAT WHY Internal Components Inspect screw conveyor internals looking for any damage to the screw or bearings. Inspect trough liner for any damage to the liner. Damage to the internals of the screw conveyor can lead to further damage or loss of function. Detecting damage early can help avoid unnecessary downtime. LUBRICATION KEY WHAT WHY Bearing Lubrication Lubricate bearings according to manufacturer’s recommendations or use an ultrasonic probe to hear when the grease reaches the bearing. Follow the ultrasonic instrument manufacturer’s recommended grease procedure. Improper lubrication can result in premature bearing life. Including damaged seals, higher temperatures, and damage to bearing race and/or rolling elements. The principal of ultrasonic greasing is that when the grease enters the bearing, friction will decrease and lower the ultrasonic signal. Pumping too much grease will increase friction and the ultrasonic signal will increase.
Table of Contents Introduction 1 CMS Document Fields 2 How to Use This Book 4 Condition Monitoring Standards 9 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 226 227 228 Belt Magnet Belt Scale Cleaner Through Flow Conveyor Screw Enclosed Coupling Chain Coupling Locking Coupling Rigid E Stop Push Button Filter In Line Filter Vacuum Belt Filter Vacuum Rotary Drum Generator Diesel Mill Ball Mill Impact Mobile Forklift Pump Lobe Pump Pitot Tube Reducer Cycloidal Ring Slewing Rolls General Seal Mechanical Double Valve Hydraulic 229 Valve Knife Gate 230 Valve Pressure Relief Spring Loaded 231 Valve Rupture Disc
Index of Other Condition Monitoring Standard Volumes CMS Volume 1 CMS Volume 2 CMS Volume 3 100 Motor AC 125 Motion Detector Magnetic 150 Universal Joint 101 Coupling Tire 126 Backstop Sprang Clutch 151 Rope Sheaves 102 Coupling Sure Flex 127 Pump Centrifugal 152 Regulator Air 103 Coupling Grid 128 Heat Exchanger 153 Pump Progressive Cavity 104 Coupling Thomas 129 Bearing Pillow Flange 154 Blower Rotary Lobe 105 Coupling Wrap Atra Flex 130 Drive Chain 155 Belt Cog 106 Coupling Gear 131 Hydraulic Unit 156 Doctor Blade 107 Coupling Jaw 132 Feeder 157 Brake Disc 108 Coupling Magnetic 133 Seal Mechanical Single 158 Bolts and Nuts 109 Coupling Torus 134 Packing 159 Cylinder Pneumatic 110 Pump Vacuum Nash 135 Valve Check 160 Pump Diaphragm 111 136 Screen Reciprocating 161 Motor DC 137 Drive V Belt 162 Valve Air Actuator 113 Pump Vertical Multistage Tank Non Pressurized Insulated Conveyor Screw Open Top 138 Screen Vibrating 163 Clutch Centrifugal 114 Valve Solenoid 139 Screen Disc 164 Expansion Joint 115 Air Breather Desiccant 140 Screen Bird 165 Coupling Fluid 116 Flinger 141 Lube Oil System 166 Hydraulic Cylinder 117 Reducer Gear 142 Fan Radial 167 Bearing Sleeve Water Cooled 118 Conveyor Belt 143 Pump Sliding Vane 168 Motor Hydraulic 119 Conveyor Drag 144 Pump Gear 169 Pump Multistage 120 Fan Axial 145 Pump Axial Piston 170 Governor 121 146 Steam Trap Mechanical 171 Pneumatic Filter Oil Mist 147 Steam Trap Thermostatic 172 Piping Hangers 123 Agitator Mixer Compressor Rotary Screw Quincy Dryer System Air Desiccant 148 Steam Trap Thermodynamic 173 Steam Turbine Small 124 Steam Joint Valmet 149 Actuator Valve 174 Caterpillar D11 Tractor 112 122 CMS Volume 4 CMS Volume 4 192 Motor Starter Magnetic 193 Accumulator Compressed Air 194 Conveyor Belt Small Production 177 Pump Centrifugal Double Suction Refiner Pulp Beloit Double Disc Refiner Pulp Classic Conical 178 Refiner Pulp Conical Disc 195 Switch Limit Linear 179 Refiner Pulp Single Disc 196 Switch Limit Rotary 180 Debarker Drum 197 Strander Carmanah Disc Operational 181 Switch Proximity Capacitive 198 Strander Carmanah Disc Stopped 182 Switch Proximity Inductive 199 Lubrication Single Point Unit 183 Switch Proximity Acoustic 184 186 Coupling Safeset Coupling Flexible Compression Sleeve Pump Peristaltic 187 Meter Flow Magnetic 188 Pump Diaphragm Metering 189 Pump Vertical Pedestal Sump 190 Drives Index Rotary 191 Accumulator Hydraulic Bladder 175 176 185 Vol 5 Introduction IDCON INC 2001 2023 0
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