Industrial pump with packing seal use matters needing attention
A water plant in Huaian double suction pump packing replacement site service summary
The situation is summarized as follows
The serious leakage picture of RDLO before replacing the filler is as follows:
After the replacement of the packing, the packing gland can not be screwed in one step without leakage. If the packing gland is screwed too tightly, it will aggravate the wear and tear. The appropriate leakage should be left (according to the allowable leakage per minute in the factory technical instructions).
After a few days of installation and operation, the leakage situation meets the requirements. Select a photo below
Problems found during packing replacement
The bushing of the four RDLO water intake pumps is worn to different degrees, among which the bushing of the #3 water intake pump is worn the most seriously, and the end face of one gland of the non-driving end of the #3 water intake pump is damaged. This daily maintenance is related to the packing is too tight.
At present, the pump with packing occasions no mechanical seal, the batch of pumps used for the waste Yellow River water, water contains more impurities, mechanical seal is easy to wear, and the large open pump to replace the mechanical seal is more difficult, so the use of packing seal is more economical and cost-effective. Working principle of packing seal is through the tight packing gland pressure, through the close coordination of the packing seal and the shaft to meet the needs of the control leakage, so packing in replacing new need to add a moderate amount of lubricant such as butter, etc., also need to be combined with the actual use, consider whether to use food grade lubricant, when new packing replacement, can only bring with your hand lightly in the nut, With the open valve after adjustment of leakage, and appropriate adjustment in the process of operation, general material packing is not allowed to zero leakage, must be adjusted according to the manufacturer's requirements, leakage of media to lubricate and cooling effect, too tight pressure will lead to excessive wear of bushing and packing.
In the process of large pump packing replacement, the difficulty of the large packing removed from the pump is larger, especially the KSB pump packing used for many years, must have enough patience, fire makes sweet malt, first find the gap filler, the stuffing out of a little bit, to tai chi, four two dial one thousand jins of capability, more anxious, more passing, pull out the effect of the worse.
It is recommended to use the original packing, especially the KSB pump, must use the original packing, expensive is expensive, but the manufacturer of packing in size, softness, materials and so on is better than the roadside stall or online shopping do not know how many times, compared to the use of poor packing is easy to wear the shaft sleeve, compared to the more money is worth more.