ã€cause of issue】
â‘ poor water quality of the pump inlet.
â‘¡ tap filter or water horn too close to the sediment, or placed in sediment.
â‘¢ pump assembly quality does not meet the requirements.
â‘£ pump impeller nut often or for a long time loose, leading to partial loosening impeller.
⑤ pumps often work in cavitation conditions, increasing the pump cavitation damage.
ã€Maintenance Methods】
â‘ test water quality of the pump, for inspection, the use of well washing (the proposed air compressor or other equipment), set the fence eaves and other measures to improve water quality. To ensure that can effectively reduce the sediment concentration of water (the general provisions of the well water volume ratio should not exceed 0.02%) and debris content.
â‘¡ raise or lift the pump faucet, water horn, leaving the sediment. Under normal circumstances, to leave the bottom of the well more than 1 meter distance is better, not less than 0.5 meters.
â‘¢ open the pump body, seized 饣 饣 retreat 湎 Ding â’ plugging value Makin pull Sumei Cang dad persecuted Chun ã„’ blocking value mu ã„Ž suffering from? Yi èŠ â‘º ⑺ 袈 袈 è½ è½ due to the cliff æµ Xi Han what? About rake blocker clock radon per scar raising envy owes the string? Strings caries? ⑹ worry pavilion 鼋? è–·? â’Œ? â’Œ é«¡? èš‹ arc W 詈 èž… 凑 find? 笾 匦 抡? Mimosa bottle eight lemon care Huan V V ni Mei Mocao boil take W Ba Xi get a move, static ring to [wash clean, and smear a small amount of clean friction on the deputy surface of the lubricating oil, To take into account the high-pressure and low-pressure side, non-bump. Static pressure gland installed hard to be uniform, to prevent the pressure off, after installation with feeler gauge inspection, the upper and lower left and right position deviation of not more than 0.05 mm; Check gland and shaft diameter with the gap, around to be uniform, the points allow Deviations of not more than 0.1 mm, install the mechanical seal parts of the pump shaft radial runout of not more than 0.05 millimeters; pump cover and seal the end cover before assembly, to carefully review the installation of mechanical seal positioning size, if the positioning size does not meet the requirements, In the sleeve between the steel pad adjustment, but the high precision steel pad, the thickness difference of not more than 0.01 mm.
The seal ring is a kind of metal ring (also called mouth ring) mounted on the pump casing at the inlet of the impeller. Its function is to prevent the abrasion between the impeller and the pump casing. The form of the seal ring is straight type and the end face is sealed. The advantages of the end face seal type are that the leaked water flows out in the radial direction and improves the pump efficiency by improving the flow state of the water at the inlet of the pump as compared with that flowing straightly outwards in the axial direction. Seal ring gap size and the inner diameter of the ring size, the general gap value of only 1 to 4 mm, the maximum shall not exceed 0.8 mm.
â‘£ open the pump body, check the impeller wear and fixed conditions. If the impeller is worn out, the impeller should be removed for repair or replacement.
⑤ eliminate cavitation factors, improve the anti-cavitation performance, and depending on the situation properly reduce the pump installation degree (to correctly calculate the pump installation height).
Centrifugal pump cavitation control methods:
A: The water pump to determine the correct height, to ensure that the impeller inlet pressure of not less than the vapor pressure.
Second: try to reduce the loss of water pipe head. Because of this greater loss, the pressure at the pump inlet decreases more and the water tends to vaporize. So try to shorten the length of the suction pipe to reduce the attachment on the pipe, the pipe wall to be smooth and appropriate to increase the diameter of the suction pipe.
Three: pump downhole installation. If cavitation is caused by excessive water absorption, install the pump downhole or below the surface, near the water absorption surface.
Fourth: the use of jet to increase the pressure on imports.
Five: try to make the pump running under rated conditions. If the pump is operating below the rated head or above the rated speed, the flow of the pump must be greater than the rated flow. The flow velocity at the inlet of the impeller must be increased and the pressure at this point will be further reduced. Therefore, the pump head and the pump speed can not be arbitrarily reduced.
Sixth: set the induction wheel at the entrance of the pump, or the use of anti-cavitation pumps and other components.
â‘ poor water quality of the pump inlet.
â‘¡ tap filter or water horn too close to the sediment, or placed in sediment.
â‘¢ pump assembly quality does not meet the requirements.
â‘£ pump impeller nut often or for a long time loose, leading to partial loosening impeller.
⑤ pumps often work in cavitation conditions, increasing the pump cavitation damage.
ã€Maintenance Methods】
â‘ test water quality of the pump, for inspection, the use of well washing (the proposed air compressor or other equipment), set the fence eaves and other measures to improve water quality. To ensure that can effectively reduce the sediment concentration of water (the general provisions of the well water volume ratio should not exceed 0.02%) and debris content.
â‘¡ raise or lift the pump faucet, water horn, leaving the sediment. Under normal circumstances, to leave the bottom of the well more than 1 meter distance is better, not less than 0.5 meters.
â‘¢ open the pump body, seized 饣 饣 retreat 湎 Ding â’ plugging value Makin pull Sumei Cang dad persecuted Chun ã„’ blocking value mu ã„Ž suffering from? Yi èŠ â‘º ⑺ 袈 袈 è½ è½ due to the cliff æµ Xi Han what? About rake blocker clock radon per scar raising envy owes the string? Strings caries? ⑹ worry pavilion 鼋? è–·? â’Œ? â’Œ é«¡? èš‹ arc W 詈 èž… 凑 find? 笾 匦 抡? Mimosa bottle eight lemon care Huan V V ni Mei Mocao boil take W Ba Xi get a move, static ring to [wash clean, and smear a small amount of clean friction on the deputy surface of the lubricating oil, To take into account the high-pressure and low-pressure side, non-bump. Static pressure gland installed hard to be uniform, to prevent the pressure off, after installation with feeler gauge inspection, the upper and lower left and right position deviation of not more than 0.05 mm; Check gland and shaft diameter with the gap, around to be uniform, the points allow Deviations of not more than 0.1 mm, install the mechanical seal parts of the pump shaft radial runout of not more than 0.05 millimeters; pump cover and seal the end cover before assembly, to carefully review the installation of mechanical seal positioning size, if the positioning size does not meet the requirements, In the sleeve between the steel pad adjustment, but the high precision steel pad, the thickness difference of not more than 0.01 mm.
The seal ring is a kind of metal ring (also called mouth ring) mounted on the pump casing at the inlet of the impeller. Its function is to prevent the abrasion between the impeller and the pump casing. The form of the seal ring is straight type and the end face is sealed. The advantages of the end face seal type are that the leaked water flows out in the radial direction and improves the pump efficiency by improving the flow state of the water at the inlet of the pump as compared with that flowing straightly outwards in the axial direction. Seal ring gap size and the inner diameter of the ring size, the general gap value of only 1 to 4 mm, the maximum shall not exceed 0.8 mm.
â‘£ open the pump body, check the impeller wear and fixed conditions. If the impeller is worn out, the impeller should be removed for repair or replacement.
⑤ eliminate cavitation factors, improve the anti-cavitation performance, and depending on the situation properly reduce the pump installation degree (to correctly calculate the pump installation height).
Centrifugal pump cavitation control methods:
A: The water pump to determine the correct height, to ensure that the impeller inlet pressure of not less than the vapor pressure.
Second: try to reduce the loss of water pipe head. Because of this greater loss, the pressure at the pump inlet decreases more and the water tends to vaporize. So try to shorten the length of the suction pipe to reduce the attachment on the pipe, the pipe wall to be smooth and appropriate to increase the diameter of the suction pipe.
Three: pump downhole installation. If cavitation is caused by excessive water absorption, install the pump downhole or below the surface, near the water absorption surface.
Fourth: the use of jet to increase the pressure on imports.
Five: try to make the pump running under rated conditions. If the pump is operating below the rated head or above the rated speed, the flow of the pump must be greater than the rated flow. The flow velocity at the inlet of the impeller must be increased and the pressure at this point will be further reduced. Therefore, the pump head and the pump speed can not be arbitrarily reduced.
Sixth: set the induction wheel at the entrance of the pump, or the use of anti-cavitation pumps and other components.
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