High pressure pump 200 bar MD type wearable centrifugal mine water pump is used to transport the clean water an the neutral liquid of pit water with solids grain<1.5%. Granularity <0.5mm. The pumps are suitable for water supply and drainage in mines, factories and cities. Note: When the...
MD type wearable centrifugal mine water pump is used to transport the clean water an the neutral liquid of pit water with solids grain<1.5%. Granularity <0.5mm. The pumps are suitable for water supply and drainage in mines, factories and cities.
Note: When the situation is in the coal mine, explosion proof type motor shall be used.
The erection height of the pump, that is the vertical distance
from the sucked liquid surface to the pump shaft should be less
than it which should be taken into consideration for users to select
the pump, is calculated per the following formula:
Hsz Ha-Hv- Hs-(NPSH)r
Hsz-- the erection height set with the pump(m)
Ha--- the head of the atmospheric pressure under the conditions on the spot of use(m)
Hv--- the head of the vapourized pressure under the temperature of the liquid being umped(m)
Hs-- the lost head of the suck-in pipeline(m)
(NPSH)r-- the necessary value of NPSH given in the table
of performance parameters(m)
Model MD pump consists of four parts, stator, rotor, bearing and shaft seal:
1.Stator consists of inlet, middle and outlet sections and the guide vane etc., with the take-up bolt tightly clamping all sections to form a working room. The inlet of it stands horizontally while the outlet vertically upward.
2.Rotor consists of the shaft, impeller, balancing disk and muff etc., the shaft passes the power to the impeller to have it work; the balancing disk balances the axial force; and replaceable muff is mounted on both sides of the shaft to protect it.
3.There are rolling and sliding bearings: The rolling bearing consists of bearing seat, bearing and bearing gland and uses grease for lubrication. The sliding bearing consists of bearing body and cover, liner, dust-proof disk, oil leveller, oil throwing ring etc., and uses thinned oil for lubrication.
4. The shaft is sealed with stuffing and the shaft seal consists of the sealing contents, stuffing, baffle. The liquid in the sealing work-room functions water-sealing, watercooling and water lubricating and the water for watersealing comes from the pressure water inside of the pump. In addition, the pump is directly actuated by the prime mover through the elastic clutch and, viewing from the prime mover, moves CW.
|Discharge Casing||QT500-7||Diffuser Sleeve||QT500-7,2Cr13|
|Middle Casing||QT500-7||Impeller Sleeve||2Cr13, 45#Steel|
|Diffuser||QT500-7||Balance Sleeve||QT500-7 3Cr13,45#|
|Shaft||40Cr, 45#Steel, 35CrMo||Balance Disc||QT500-7|