X stand 2 # propane compressor main motor bearing high temperature alarm failure cases

X stand 2 # propane compressor main motor bearing 2020 - high temperature alarm failure cases 09 - 07 01 equipment is of daniudi gas field X stand yu Yang district is located in yulin city in rural village of knife rabbit rabbit, design of natural gas processing scale & 50 times; 108 nm3 /。 Hydrocarbon technology on November 29, 2015, dehydration is built and put into operation, the main function is the upstream QiZhan to gas low temperature separation and mixed hydrocarbon fractionation. Among them, the low temperature separation mainly by propane refrigeration system to reduce the water dew point of natural gas. The core equipment for two (2) the head of domestic assembly of york RWB Ⅱ e - 856 BC injection type twin-screw propane compressor (1) and the supplementary equipment, the scene using a with a case of running mode. Design inspiratory pressure range 170 KPa to 827 KPa, exhaust pressure range 960 KPa to 1160 KPa, refrigerant R290 model, the rated capacity of 4200 kw, 1120 kw motor power, rated voltage 10 kv, as of January 25, 2020, the cumulative 17223 h operation. 02 event after a 07:10 - on January 25, 2019 07:13, 2 # propane compressor main motor drive end bearing shell temperature from 65 ℃ to gradually rise to 75 ℃, for unit testing, found 2 # propane compressor main motor drive end bearing shell oil pool had the oil vapor emitted, breathing cap 07:15 manually uninstall downtime, switch 1 # propane compressor unit operation. On January 26, he after the replacement of the main spindle motor drive on the tile and lubricating oil, troubleshooting, rev machine running normally, various parameters after total 34 h of maintenance downtime. 03, measures to 1. Standby switch 1 # propane compressor unit operation. 2. Undergo screening of propane compressor main motor, main motor drive side and the drive end oil lubricating oil window display 'normal', the temperature sensor is normal. 3. Disconnect the unit coupling, dismantling compression main spindle motor drive on the tile, find bearing shell oil pool lubricating oil level is low, the spindle tile abrasion. 4. Lubricating oil on main motor drive on Windows levelness of tubing for inspection, found that Windows end end position is lower than the oil tubing, oil Windows lose level normal display function, can't reflect the real oil bearing shell oil pool. 5. Open the main motor spindle not drive on the tile, conform to the requirements of the two-thirds of the oil, spindle tile is normal. 6. Replace the main spindle motor drive on the tile, oil Windows led tubing to installation and debugging, bearing oil pool to clean up, after the oil change. Rev machine commissioning, the parameter display is normal. Figure 1: lubricating oil Windows led tubing horizontal tilt figure 2: the main motor drive end bearing wear 04 due to analyse 1. Direct cause main motor drive end bearing shell oil pool of oil caused by oil slinger jilt oil quantity is not enough, lead to the main shaft tile insufficient lubrication, bearing wear, cause high temperature alarm. 2. The indirect reason 1. Main motor drive end bearing shell oil pool Windows led tubing installation tilt, can't show real oil bearing shell oil pool, lead to bearing oil pool is not found in time and supplement after short of oil. 2. Owner unit to unit maintenance inspection quality control is lax, only through the window to observe the oil level, oil bearing on oil pool in the amount of lubricating oil in check, lead to insufficient bearing shell oil pool in the amount of lubricating oil filling in. 3. Unit design is flawed, diskless car function. Main motor spindle oil film thinning when stopped for a long time, and the machine lubrication moment does not reach the designated position, accelerate the bearing wear. 05 fan cuo shi 1. Strictly implement equipment point check system, strengthen the compressed main motor bearing shell oil pool inspection tour, timely supplement and replacement lubricating oil, ensure the liquid level in two-thirds. 2. When stop inspection on lubricating oil Windows led tubing levelness, at the same time at the other side of the bearing oil pool body with oil window, add lubricating oil a checkpoint, comparative analysis, to ensure that the reading level true and accurate. 3. Revision procedures, increase the turning operation steps. To manually before unit start-up machine turning 3 - Five laps, ensure sufficient lubrication in areas such as the main motor bearing shell. 4. Strictly implement the main motor maintenance procedures, equipment management personnel on duty, webmaster to do a good job of maintenance process regulation and quality acceptance. 5. Central personnel completes the compressor state monitoring, ensure that the unit operation parameters in a reasonable range. Regular analysis of the condition monitoring data and optimize the operation parameters, to ensure the smooth and efficient operation. Note: (1) injection type twin-screw propane compressor not set lubricating oil pump, fuel injection by positive pressure differential. Lubricating oil from the oil separator exports part into the thermal siphon oil cooler, through temperature control the 3-way valve (pos. No. Adjust to 65. 5 ℃, filter to obtain more clean lubricating oil, oil pressure switch to 450 kpa, screw injection to the nose, completion of lubrication with export back to the oil separator, oil circulation lubrication process. （ North China branch of oil and gas wells. the a factory)