Summary Post on Technical Exchanges Regarding Conveying Equipment (36) – Reasons
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I have compiled all the posts related to technical discussions on the reasons for certain issues in the conveyor equipment technology exchange area, so as to make it easier for everyone to find what they need, save time, and assist others in resolving their problems! Floor 1: 1–100 Floor 2: 101–200 Floor 3: 201–300 Floor 4: 301–345 (Click the title directly to access the hyperlink) 1. Please discuss the reasons for the deviation of the conveyor belt and possible solutions 2. What are the reasons why the load control valve of the metering pump (plunger pump) cannot be adjusted? 3. Reasons for high temperature of the turbine thrust bearing pads 4. Urgent! Questions: 1. Reasons for vibration; 2. Reasons for high discharge pressure in screw compressors; 3. Help needed: Analysis of the reasons for excessive vibration during the operation of screw pumps; 4. Analysis of the reasons why a centrifugal compressor suddenly fails to increase its flow rate? ? 8. Reasons for high pump current 9. Reasons for decreased pump outlet flow 10. Reasons for the plunger pump to shut down? ? ? 11. What are the causes of oil film oscillation and oil film whirling in sliding bearings, and how can they be resolved? ? 12. What are the causes of crankshaft failure in piston compressors? 13. What are the factors that affect the quality of compressed air and what are the countermeasures? 14. What causes excessive vibration and loud noise in the pump outlet pipeline? 15. What are the causes of failure in the check valve at the outlet of a reciprocating compressor? 16. Have you ever seen bearings damaged to such an extent? Analyze what the reasons are: 1, 2, 17. Reasons for the damage to the rolling bearings of screw ammonia compressors. 18. Please help analyze what is causing problems with our rich gas compressors. 19. Why isn’t oil being supplied to the screw compressor? 20. Analysis of the causes of bearing current in steam turbine-compressor units? 21. Reasons for the decline in performance of turbine compressors 22. Reasons for unstable outlet pressure in centrifugal compressors 23. Purpose of the spray water in the cylinders of methanol-ammonia cycles 24. What aspects should be considered when analyzing unstable flow rates in piston pumps? 25. Typical faults and causes of centrifugal pumps 26. Analysis of the reasons for coupling failure in centrifugal pumps 27. Reasons for the detachment of impellers in axial flow pumps 28. Analysis of the abnormal changes in shaft displacement in centrifugal compressors 29. What are the reasons for noise inside the pump? How to handle it? 30. Exploration of the causes of corrosion in chlorine compressors 31. What are the reasons for the low outlet temperature of steam at the back pressure side of the turbine? And how to deal with the issue of pump evacuation; its causes and solutions. 33. Analysis of the reasons for rod breakage in piston vacuum pumps! 34. Question: What are the reasons for rod breakage in the castings of piston compressors? 35. Analysis of common fault causes in pumps and corresponding measures. 36. Discussion on the reasons behind this phenomenon in pumps! 37. What causes oil emulsification inside the pump? 38. What is the reason why a multi-stage pump suddenly stops delivering flow? 39. What are the reasons for the pump sticking multiple times in a multi-stage pump? 40. Causes and solutions for abnormal noise and vibration in commonly used chemical processing equipment. 41. What are the reasons for the frequent breakage of the connection bolts between the packing chamber and the cylinder body of the No. 1 pump in the urea production workshop? 42. Ring fracture of the bearing – exploration of possible causes (with diagrams). 43. After the air compressor shuts down, a large amount of lubricating oil sprays onto the turbine – what could be the reasons? 44. What is the reason why a centrifugal ammonia pump does not deliver flow? 45. What causes loud noises from the bearings of a centrifugal fan? 46. Discussion on the causes of shaft fracture in coking quenching water pumps. 47. What are the reasons for the low temperature of the compressor’s power cylinder?! 48. What causes the overcurrent in the ammonia pump motor in the urea production plant? 49. What are the causes of turbine surging? 50. What are the reasons for the emulsification of lubricating oil in high-speed pump gearboxes? 51. What are the reasons for using sliding pins in turbines, and what are the types and functions of these sliding pins? 52. The shaft vibration of the air compressor is high at only one point, while all other points are operating normally. What could be the reason? 53. Reasons for valve disc failure in rich gas compressors. 54. What causes abnormal wear or burning of compressor packing? 55. Reasons why an oxygen pump does not deliver flow. 56. Reasons for hardening and failure of mechanical seal O-rings. 57. Why does a high-speed pump have high current but low flow? 58. Reasons for frequent automatic shutdown of the external transfer pump. 59. Reasons for preventing freezing of the pump in winter and methods for doing so. 60. Inquiry regarding the reasons for periodic fluctuations in the turbine speed. 61. Reasons for high power consumption. 62. Analysis of the causes of piston breakage in piston compressors. 63. What are the reasons for seal leakage in high-speed pumps? 64. Please analyze the reasons for the damage to the crosshead of the air compressor. Thank you! 65. What are the reasons why the steam inlet temperature of a turbine fails to reach the set temperature before it is started up? And how to deal with this phenomenon? 66. What causes the turbine speed to fluctuate around 150 revolutions per minute? 67. What are the reasons for changes in the oil outlet temperature of the cooler? 68. What is the cause of the oil pump not being able to supply oil? How to rule it out? 69. Reasons for the explosion of centrifugal pumps 70. Reasons for the jamming of JSR150 Roots blowers 71. Reasons for the damage of fan bearings 72. Investigation into the reasons for turbine blade failure 73. What are the main causes of high vibration and noise in centrifugal pumps? ? 74. Reasons for water entering the crankcase of reciprocating air compressors 75. What are the causes of bearing overheating? How to rule it out? 76. What causes the noise that occurs inside the bearing? How to rule it out? 77. What are the causes of oil leakage from the filler? How to rule it out? 78. What are the reasons for the gradual decrease in oil pressure of the oil pump? 79. Discussion on the working principle of water ring vacuum pumps and the causes of cavitation. 80. Causes of leakage in mechanical seals and remedial measures. 81. What are the reasons why electric compressors fail to start? How to rule it out? 82. What are the causes of early damage to the valve disc? How to rule it out? 83. Reasons for weak pumping performance of steam ejectors. 84. Fault modes and causes of high-speed centrifugal pumps. 85. What are the reasons for cracks in the pump casing? How to check? 86. The TRG (bearing monitor) gauge of the shielded pump shows the red zone; please discuss what could be the reasons for this situation 87. Why does the vibration of the steam turbine increase intermittently? 88. Briefly explain the reasons why the rotor comes to rest and the vacuum level drops to zero after shutting down the machine by tripping the breaker 89. What are the causes of elevated temperature in individual bearings and an overall increase in bearing temperatures? 90. Causes of abnormal vibration in steam turbine units 91. Reasons for fluctuations in the vibration levels of nitrogen turbocompressors? 92. What causes high temperatures in the compressor packing? 93. What are the reasons for the burnout of the motors in the two magnetic pump units? 94. Analysis of the reasons for high temperature in vacuum pumps. 95. What are the reasons for excessive vibration in reciprocating compressors? 96. Causes of failure in floating ring seals and preventive measures 97. Reasons for bearing wear in large fans and methods for dealing with it 98. Causes of oil leakage from the piston rod of oxygen compressors and methods for addressing it 99. Reasons for oil leakage from the shaft seal of variable-speed hydraulic couplings 100. What are the reasons for an increase in rotor bending degree and fluctuations in the cranking current after a steam turbine stops or before it is started while still hot?
Continuing: 101. What is the reason why the liquid discharge valve cannot be closed after it has been opened? What should I do? 102. What is the reason for the bearing temperature of the centrifugal compressor unit to be 200°C? (Attached diagram) 103: The shaft on the non-driving side of the high-pressure pump is broken! Experts analyze the possible reasons for shaft breakage. 104. What is the cause of oil ingress into the steam seal? 105. Reasons for high temperature of thrust bearings 106. What causes high outlet pressure in centrifugal pumps? 107. Fault modes and causes of gear pumps 108. Fault modes and causes of screw pumps 109. Analysis of the reasons for seal leakage in circulating cooling and washing water pumps and corresponding countermeasures 110. Reasons for faults in the “four-in-one” units of dual-pressure nitric acid plants and ways to improve them 111. Main forms and causes of failures in rolling bearings 112. Fault modes and causes of plunger pumps 113. Fault modes and causes of single-stage centrifugal pumps 114. Reasons for blockages at the pump outlet 115. What are the reasons for cylinder collision in piston compressors? 116. Reasons for skeleton oil seal leakage and methods to resolve it 117. Help: What are the reasons for insufficient compression volume in screw compressors? ? 118. What can cause insufficient flow in a centrifugal pump? 119. Causes of increased compressor shaft displacement and solutions 120. What are the reasons for frequent locking of the boiler feed water pump? 121. During normal pump operation, if the normal flow rate is not achieved, the motor heats up to the point where it shuts down. What’s the reason? 122. Reasons for leakage in the mechanical seal of centrifugal pumps 123. Main reasons for excessive temperature in screw compressors 124. Table of reasons for seal leakage 125. Failures of piston compressors, their causes, and corrective measures 126. Reasons for the deterioration of lubricating oil 127. The high-pressure compressor stopped operating within less than an hour of being started; please help analyze what might be the possible reasons. 128. Reasons for vibration in the outlet pipeline during the startup of screw compressors 129. Discussion on the causes of rubbing in steam turbines 130. Brief analysis of several reasons for vibration in water pumps 131. What are the reasons for emergency shutdowns in ammonia refrigeration plants? 132. What are the reasons for severe smoke leakage from the exhaust fan? 133. What are the reasons for fluctuations in the feedback signal of the smoke exhaust fan inlet butterfly valve? 134. Discuss and share the causes of surge in centrifugal compressors. 135. What are the reasons for the failure of the impeller in water ring vacuum pumps? 136. Reasons why a centrifugal pump cannot start or experiences high startup load, along with solutions. 137. Several main reasons for damage to turbine bearing shells. 138. Reasons for a decrease in the pressure difference across the inlet filter of a centrifugal pump. 139. Analysis of the causes of vibration in water pumps. 140. What are the reasons for a low terminal difference in a turbine when all other parameters are normal? 141. What causes leaks in water ring vacuum pumps? 142. What is the reason for overheating of the piston rod? How to rule it out? 143. What are the reasons why a screw pump won’t rotate? 144. Reasons for vibration in centrifugal pumps 145. Why do vibrations in centrifugal pumps cause the connection pipes to break? 146. May I ask whether this type of crack is caused by manufacturing defects or corrosion? (Please take another look) 147. Causes of damage to turbomolecular pumps and design safety measures. 148. What are the reasons why centrifugal pumps do not deliver sufficient flow? 149. Causes of filter press failures and methods for troubleshooting 150. What are the reasons for cylinder collision in reciprocating compressors? 151. Reasons for damage to the compressor impeller. 152. What are the common reasons why a liquid ring vacuum pump cannot be rotated? 153. What are the reasons why a multi-stage deep well pump cannot build pressure? 154. The shaft seal of the centrifugal pump is leaking, and it won’t stop leaking – what could be the reasons? 155. Requirements for the quality of turbine oil and reasons for oil emulsification. 156. A sludge-like substance often appears in the bearing lubrication chambers of multi-stage high-pressure centrifugal pumps. What are the reasons? 157. What causes a hydraulic actuator to fail to return to its original position? 158. A brief analysis of the causes of structural damage in tower cranes and their repair. 159. What are the main reasons for abnormal noises in the air valves of reciprocating compressors? 160. Causes of diaphragm metering pump failures 161. Reasons why the water pump does not deliver flow or delivers insufficient flow? 162. Reasons for low current and low outlet pressure in water pumps. 163. Analysis of the reasons for damage to the mechanical seal in screw pumps (with photos). 164. What are the causes of vibration in submersible pumps? 165. Analysis of the causes of compressor failures and corresponding countermeasures. 166. Analysis of the reasons for looseness of the locking nut on the impeller of centrifugal pumps, as well as the measures to prevent this from happening. 167. Causes of common faults in small reciprocating compressors and ways to resolve them. 168. Why doesn’t a gear pump generate pressure? 169. What is the blockage phenomenon in centrifugal compressors? What could be the reasons for the blockage? 170. Reasons for changes in the suction pressure of centrifugal pumps. 171. What causes large vibrations in the discharge pipeline of steam reciprocating pumps? 172. Reasons for excessive pressure in the clean water pump. 173. Reasons for the burnout of the motor bearings in the air compressor. 174. What are the reasons for leakage or high temperature in the compressor packing? 175. Reasons for high bearing temperature in liquid oxygen pumps. 176. When the inlet valve of the fan is opened to 30%, the current exceeds the rated value – what are the possible reasons? 177. Common causes of failure in centrifugal water pumps 178. What is the reason why a shielded pump does not generate pressure? ? 179. What are the reasons why the lubricating oil pump does not deliver sufficient flow, and how to address it? 180. What are the reasons why the turbine speed cannot be increased, and how to deal with them? 181. What are the causes of insufficient flow from a pump? 182. Causes of shaft seizure in pump bearings 183. What are the reasons for a decrease in the exhaust vacuum of a steam turbine? 184. Reasons for large fluctuations in turbine speed 185. Analysis of the reasons for the detachment of the impeller in ring-pipe polypropylene axial flow pumps 186. Reasons for increased temperature in blower bearings 187. Analysis of the reasons why pneumatic diaphragm pumps fail to deliver fluid 188. Reasons for vibration in screw-type lubricating oil pumps 189. Various factors affecting the operation of Roots pumps 190. Reasons for an increase in flow rate of boiler feed water pumps accompanied by abnormal pressure drops 191. Why is a new pump leaking? 192. Reasons for excessive vibration in the exhaust gas turbine compressor. 193. Significant vibration in the pipelines of the air cooling fans in the gas separation unit: causes and solutions? 194. Reasons for overcurrent during the testing of the high-pressure feedwater pump in the remaining boilers. 195. Analysis of the causes of bearing vibration in power plant turbine units and corresponding solutions. 196. Analysis of the reasons for low vacuum in turbine condensers and appropriate countermeasures. 197. What are the main internal losses in turbines, and what are the causes of these losses? 198. Reasons for excessive shaft vibration in ammonia synthesis turbines. 199. What are the causes of surge in water ring vacuum pumps? 200. Reasons for the sudden increase in exhaust pressure in condensing steam turbines
Continuing: 201. What are the reasons why the outlet pressure of a submersible pump cannot increase? 202. What are the reasons for damage to the drive gears of rotary vane fans? 203. Examine the photos and analyze the reasons for pump shaft breakage. 204. Practical experience: What are the reasons why the flow rate of a centrifugal pump does not reach the designed value? 205. What are the reasons for low outlet pressure in a water ring compressor? 206. Analysis of problems and their causes in turbine-driven reciprocating compressor systems. 207. Cause analysis and improvements for leaks in ammonia compressor seals. 208. What are the reasons for shaft breakage in vacuum pumps? 209. What are the reasons for the automatic shutdown of vortex pumps? How to deal with it? 210. Why is the lubrication oil pressure low when starting a centrifugal compressor? 211. Analysis of the reasons for frequent clogging of oil-gas separators and methods to resolve it 212. Reasons for overload failures in the prime mover of centrifugal pumps 213. What are the main internal losses in turbines, and what are the causes of these losses? 214. Analysis of the reasons for vibration in water pumps 215. Reasons for thermal protection activation in refrigerators 216. What are the main internal losses in turbines, and what are the causes of these losses? 217. Reasons for motor burnout due to vibration and preventive measures 218. What is the real reason for insufficient water supply from pumps along with excessive vibration? 219. What are the correct operating procedures for centrifugal pumps and why? 220. Analysis of the causes of compressor failures and corresponding countermeasures. 221. Reasons for shaft failure in the forced circulation pumps used in evaporation units in chlor-alkali production. 222. What are the reasons for the shaft seizure in high-pressure water pump motors? 223. What are the reasons for a sudden shutdown of a high-pressure reciprocating pump? 224. What are the reasons for high noise in shielded pumps? 225. What are the reasons for wear of the compressor thrust bearing pads? 226. What are the reasons why a high-pressure reciprocating pump does not generate pressure? 227. The outlet pressure is normal after the centrifugal pump starts, but no flow is generated after 30 seconds (the pressure gauge fluctuates back and forth). What could be the reason? 228. What are the reasons for the poor cooling performance of lithium bromide chiller units? 229. Reasons for overheating of centrifugal pump bearings 230. Reasons for high temperature at the secondary outlet of reciprocating compressors 231. Reasons for insufficient flow rate in centrifugal pumps and solutions 232. Analysis of the reasons why the diaphragms in double-diaphragm metering pumps get deformed? 233. Reasons for increased shaft vibration in expanders 234. Causes of pump shaft fracture in AY pumps? 235. What are the main internal losses in steam turbines, and what are the causes of these losses? 236. Why do pump seals keep breaking? 237. What are the reasons for lubricant emulsification? 238. Analysis of the reasons for two sudden vibrations in the low-pressure cylinder of a carbon dioxide compressor. 239. Reasons for the breakage of the internal teeth in the lock ring of the thrust bearing of a screw compressor. 240. Reasons for excessive displacement and vibration in compressors. 241. Reasons why a shielded ammonia pump does not deliver any flow. 242. What are the reasons for vibration in smoke exhaust fans? Is there any good solution? 243. What are the reasons for a sudden increase in vibration in centrifugal compressors? 244. Reasons for the detachment of the impeller in acid pumps 245. Analysis of the reasons for frequent failures after technical upgrades to air compression units 246. What are the causes of noise in G-series single-screw pumps? 247. Why do Roots vacuum pumps tend to get stuck? 248. Causes and solutions for problems such as insufficient flow or no flow from metering pumps 249. What are the reasons for poor circulation of the cooling fluid in centrifugal pump mechanical seals? 250. Urgent! ! ! What is the cause of the interlock due to low flow rate of the sealing gas during compressor startup testing? 251. Common causes of leakage in water pumps and solutions. 252. Analysis of the causes of faults in hydraulic pumps and methods for improvement. 253. Reasons for overall vibration in reciprocating compressor units. 254. Reasons for a decrease in the flow rate of oxygen compressors. 255. What are the reasons why multi-stage centrifugal pumps cannot deliver sufficient flow? 256. Reasons for excessive vibration levels in the exhaust fan. 257. What causes pump motors to burn out? 258. Reasons for insufficient air volume in reciprocating compressors. 259. Cause analysis and repair of tracking deviation faults in crawler cranes. 260. What are the reasons for vibration in the outlet pipeline of screw compressors when they are started? 261. What are the reasons for low outlet pressure in centrifugal pumps? 262. What are the reasons for a decrease in pump flow rate? 263. What causes fluctuations in the outlet pressure of shielded pumps? 264. What are the reasons for high bearing temperatures in large compressors and what measures can be taken? 265. What causes excessive vibration in the outlet pipeline of reciprocating compressors? 266. What are the reasons why a steam turbine’s quick-shut valve cannot be opened? 267. Causes of surge in centrifugal compressors! 268. Technical knowledge: Analysis of various reasons why a water pump does not deliver water. 269. Reasons for fractures at the seal cover and bearing housing of centrifugal pumps. 270. Analysis of reasons why high-speed centrifugal pumps do not produce sufficient flow. 271. Reasons for low system pressure in the electro-hydraulic actuator system for slide valves. 272. What are the reasons for periodic leakage in the mechanical seal of oil pumps? 273. Analysis of the causes of pump shaft damage (already recommended) 274. What are the causes of damage to pump couplings? 275. Analysis of the reasons for turbine vibration 276. What are the reasons for excessive vibration in centrifugal pumps? 277. What causes the axial thrust in centrifugal pumps? 278. Reasons for the breakdown of the compressor valve plates. 279. What are the reasons for the gradual decrease in oil pressure in the compressor oil pump? 280. What is the cause of the abnormal increase in the intermediate exhaust pressure of the compressor? How to rule it out? 281. What are the reasons for the continuous increase in the temperature of the cylinder in a hydrogen compressor? How to rule it out? 282. Reasons why a gear pump does not deliver flow. 283. Reasons for water presence in the inter-stage liquid separation tank of a reciprocating compressor. 284. What are the causes of severe vibration in a circulating hydrogen compressor? 285. Why is a safety valve installed at the inlet of a high-pressure centrifugal pump? 286. Reasons for oil leakage from the pump’s oil sump. 287. What are the causes of vibration at the compressor inlet? 288. What are the reasons why the auxiliary packing of the circulator models D20-12/289-314 produced by Shenyang Jinbo often burns out? 289. Reasons for shaft breakage in centrifugal pumps. 290. I would appreciate it if colleagues could help investigate the reasons for the shutdown of high-pressure slurry pumps. 291. Analysis of the reasons for deterioration in oil quality. 292. Reasons for a decrease in the quality of lubricating oil in reciprocating compressors. 293. What are the reasons for sluggish rotation of the shaft disk in LSY-type liquid chlorine submersible pumps, as well as for the automatic shutdown of the motor after it starts? 294. Reasons for high exhaust temperature in reciprocating compressors. 295. Analysis of the reasons for rising temperature in the thrust bearings of turbines? 296. Reasons for the accidental shutdown of the pump. 297. Reasons for leaks in the chloromethane compressor. 298. Why does the shaft displacement of the centrifugal compressor unit keep changing? 299. Reasons for the shutdown of centrifugal pumps 300. Investigation into the causes of rotor damage due to mutual grinding and shell cracking in dry screw compressors
Continuing: 301. What are the reasons why a diaphragm compressor does not deliver flow? 302. Analysis of the causes of water pump vibration. 303. What are the reasons for wear of the mechanical seal (dynamic seal) in reaction vessels? 304. Reasons why the temperature of the compressor and the thrust bearing in the high-pressure cylinder remains high. 305. Reasons for the gradual decrease in outlet pressure when a centrifugal pump is operating at normal flow rate, with no change in flow rate! 306: The drive shaft of the cooling tower fan in my plant has cracks. Could everyone help analyze what might be the cause? 307: Reasons for high acceleration in the pump bearing housing. 308: Let’s discuss the reasons why diaphragm compressors fail to deliver the required flow rate. 309: A list of the causes of vibration in cooling tower fans and corresponding solutions. 310: The slurry pumps (diaphragm pumps) in my plant get clogged frequently; what could be the reasons for this? ? 311. What are the reasons for low flow rate in the recycle hydrogen compressor? 312. What causes changes in the pipe diameter for installing floats and instruments? 313. What are the reasons for high vibration levels in centrifugal pumps? 314. What are the reasons for the excessively high temperature of the front bearing of the pump’s motor? 315. Investigation of the reasons why a single-cylinder slurry pump does not deliver flow and corresponding solutions. 316. What are the reasons for unstable outlet pressure in diaphragm pumps? ? 317. What are the reasons for significant fluctuations in the flow rate at the outlet of the liquid oxygen pump? 318. Reasons for low oil pressure despite normal oil temperature in high-speed pumps. 319. Reasons for vacuum formation in gasoline pumps. 320. Reasons for excessive temperature inside the casing of a shielded pump, leading to pump shutdown via interlock. 321. A brief discussion on the causes of severe wear in hydraulic pumps and ways to address them. 322. Analysis of the causes of leakage in the seal of ammonia compressors and methods for improvement (downloaded from the Internet). 323. Urgent need to understand the reasons for damage to motor bearing brackets and shaft deformation. 324. Reasons for cavitation in high-speed pumps. 325. How to deal with and what are the reasons for electrically charged motor casings. 326. Reasons why the rapid shut-off valve of a steam turbine cannot be opened. 327. Reasons why the pressure indicated by the air compressor’s gauge does not reach the required starting pressure. 328. Analysis of the causes of leakage in the seal of ammonia compressors and methods for improvement. 329. Analysis of the reasons for pump shutdown in high-pressure coal slurry pumps. 330. What are the reasons for damage to the shaft and impeller of high-speed pumps during startup? 331. What are the reasons for fires occurring in oil pumps? 332. Analysis of the reasons for overload in pump motors. 333. What are the reasons for fluctuations in the vacuum gauge reading of a steam turbine? 334. What is the cause of gaps at the junction between the rotor blades of a steam turbine and the steam seal? 335. Analysis of the causes of failure in the turbine worm gear of the condensate pump and improvement measures. 336. Cavitation in water pumps and its causes. 337. Reasons for overpressure and temperature drop in the four stages of a compressor. 338. Reasons for excessive vibration in the new rotor, and reasons for the fracture of the first-stage locking plate. 339. What are the reasons for a centrifugal pump to lock up suddenly during operation? 340. What is the reason for the high noise level of this pump? 341. Causes of shaft breakage in circulating water centrifugal pumps 342. Reasons why magnetic pumps fail to deliver fluid (with diagrams) 343. Causes and symptoms of pump cavitation 344. What causes noise in the impeller of a centrifugal pump? 345. What are the reasons for abnormal vibration in compressor housings? How to rule it out?