Stainless steel centrifugal pump rolling bearing lubrication is mainly to reduce the friction power consumption, reduce wear rate, but also play a cooling, dust, rust and vibration absorption and so on. Well equipment lubrication is to ensure the normal operation of equipment. Reduce equipment wear, prevent equipment accidents, reduce power consumption, extend the repair cycle and the effective measures of life.
This type of water pump rolling bearings lubricated by 30# (winter) or 40# (summer) mechanical lubrication. Due to the design of dynamic seal leakage is very serious, not only caused a lot of waste oil, bearing damage, and environmental pollution, is not conducive to the safe operation of equipment and civilized production. In a few years of work, in order to solve this problem, a number of small changes to small leather.
A way to transform the process of lubrication
[felt seal change to single seal]
The original bearing box seal with felt seal. The leak is very serious, each pump fuel consumption is about 300kg/a, caused a lot of waste oil, a thick layer of oil on the ground.
In order to change the status of oil spill, modified felt seal skeleton seal, as follows:
The bearing box and cover for processing, the car out of a deep hole diameter of 65mm, 12mm, fit a specification for the seal 45mm * 60MM * 12mm.
The blanket is removed, the seal with a hammer gently into it, and the correct installation.
After reformation, the equipment in normal operation, the vibration displacement is about 0.04mm, the bearing temperature is about 50 degrees C, each pump in oil consumption is only about 50kg. Keep the house clean, prevent due to lack of oil caused by bearing, shaft damage accident, make the operation of the equipment in good condition.
A single skeleton oil seal is changed to double skeleton oil seal
In order to reduce the amount of leakage is more, according to the structure of the bearing box cover, and put forward the reform scheme, the bearing box end cover for processing hole diameter 65mm. Change the single layer skeleton oil seal to the double-layer skeleton oil seal:
Test run shows that this method is very effective in preventing the leakage of oil in the short term. But after 6 months of continuous operation, due to the wear of the skeleton oil seal will increase the amount of leakage.
Two, skeleton oil seal defects
The felt seal to seal, the use of 4A, although the effect is good, but there are obvious defects.
In practical work, because the seal life is short, often need to change, in the replacement of skeleton oil seal, all equipment needs to be disintegrated, on the one hand to increase the labor intensity of workers, on the other hand, equipment overhaul process, the damage may cause the impeller, bearings and other parts of the economy, does not meet the requirements of equipment management, but if you do not change the oil seal, causing leakage, is not conducive to sealing, but also directly affect the bearing life. In short, the practice has proved that: the skeleton oil seal does not completely solve the problem of oil leakage of the bearing box.
Three, lubricating grease instead of lubricating oil
At present, but also cheap and no leakage of the sealing device has not, and some sealing effect is good, but the price is expensive, the economy is not feasible. After investigation and research, the decision to bold test - to replace the lubricating oil with grease lubrication.
[transformation method]
Taking into account the pump shaft power is only 18.5kw, the flow rate is only 200m3/h; pump speed is 1450r/min, the line speed is 3.4m/s. From the above two points, it is feasible to use grease lubrication.
The concrete method is as follows
The oil in the oil discharged, cleaning of the bearing box.
The end cover of the two ends of the bearing box and the oil discharging hole are opened to eliminate the air in the box body.
The butter gun grease filling hole to the bearing box by filling, add grease from both ends of cover and the oil drain hole extrusion, as fill, and tighten the bearing end cover and the oil drain hole plug wire. Hand turning, the grease evenly distributed in the box body.
Start the pump, open the outlet valve of the pump operation, under normal circumstances, to monitor the temperature of the bearing and the situation of oil pumps.
Grease oil is good, without changing the pump in normal operation, the temperature monitoring data and vibration monitoring data can be seen, with grease instead of lubricating oil is feasible, and can be popularized and applied in the same type of pump.
[lubricating grease lubrication effect]
Grease is not easy to leak, is conducive to the lubrication of pump bearings, to ensure safe and stable operation of the pump, greatly reducing the amount of fuel and the number of times. Not only saving, but also reduce the labor intensity of workers. Specifically speaking:
The cost of oil saving. The use of lubricating oil per pump consumption of 9kg/a, the cost of 63 yuan /a. And the oil consumption in the framework of the skeleton oil seal in good condition for 4kg/ months, the cost of 200 yuan /a. Each pump can save 137 yuan /a, greatly reducing the cost of lubrication.
Reduce maintenance costs. Seal the average life span of 4 months, in order to replace the seal, the annual need for inspection and repair 3 times, instead of lithium grease lubrication, reduce labor costs. Material cost, mechanical cost, and avoid the damage caused by equipment parts in the process of maintenance.
The operation period of equipment is prolonged. From vibration. Temperature and other aspects of the monitoring, the use of grease sealing performance is good, bearings running well, extend the service life of the bearing.
Improve the job environment.
没有评论:
发表评论