Reduce the type D booster horizontal multistage pump of the seven methods of balance disc wear

Balance disc booster is used for horizontal multistage pump axial force balance, working fluid as a liquid, the role of balance disc type D booster horizontal multistage pump is mainly automatic balance the axial thrust.

lower multistage pump balance disc wear seven methods:

1. The balancing drum and the balancing plate joint device

drum axial clearance does not exist, the labyrinth seal/comb seal and balance of concave and convex chamfer drum radial radial clearance, can have better relief effect, high pressure gas flows through the balancing drum radial clearance after the balance into the cavity, then enter the balance tube connected to the entrance, the cavity pressure always equal or slightly higher than the inlet pressure, in order to achieve the purpose of the balance of axial force.

         2. Choose wear-resisting material

multistage pump series more, relative slender shaft, the static deflection is larger, easy, the phenomenon of the rotor and fixed parts touching one another, lead to unstable operation, vibration noise increases, the vulnerability of premature failure. To overcome this defect, we request manufacturers in the original design on the basis of more principal axis design size, make the spindle rigidity strengthen greatly, run more smoothly.

         3. Reduce the impurities in the conveying medium

often cleaning tank or water storehouse, filter, maximum limit reduce the content of impurities in medium. According to the characteristics of the medium, on the balance disc and balance of the multistage pump ring joint surface wear resistance, corrosion resistance and anti-friction resistance coating, at the same time adopt measures to reduce balancing water resistance, can effectively reduce the chamber pressure, greatly improve the reliability of the shaft sealing, reduce the leakage.

         4. Balance pipe

D booster horizontal multistage pump on pump in balance the axial force balance mechanism, balance balance device with liquid flow, balance the liquid by the balance pipes connected to suction section, or in a short tube, balance of outdoor design balance liquid by the short tube flow pump. In order to ensure the normal operation of pump, balance pipe is absolutely not allowed to jam.

         5. Avoid cavitation

in the process of pump operation, to ensure a high enough level, avoid suction height is too big, so can not only avoid cavitation, and can improve the efficiency of the pump.

         6. Assembly adopts preload method

booster for type D horizontal multistage pump, and failed to solve for a long time of guide vane set out of stock rotation in the middle or small problem, we use the preloaded assembly solution shall be thoroughly, reduce the vibration and noise of the pump, the water pump running more smooth and quiet.

         7. Strengthening the management of operation and maintenance, and strictly carry out operation start

procedures: before starting the pump should turn the pump rotor, check whether the rotor is flexible; Open pump suction valve, close the pump outlet pipe valve and pressure gauge cocks, had filled with liquid in the pump, or use the vacuum system to eliminate the air in the suction pipe and pump; Start the motor, after waiting for normal operation the pump, open the pressure gauge cocks, slowly open the pump discharge gate, until the pressure gauge pointer refers to the required pressure.

run: in the process of running, must pay attention to observe the meter reading, bearing heating, packing leakage, and heating and pump vibration and sound is normal, if discovery is unusual, should be timely treatment; Bearing temperature rise reflects the assembly quality of the pump, bearing temperature rise shall not be higher than ambient temperature 35 ℃, the highest temperature is not higher than 75 ℃; bearing Problems in the operation of the pump rotor in axial winding, axial movement should be within the scope of the permit, shall ensure that the motor and pump coupling end Jiong clearance value; should be check regularly during operation, sealing rings, guide vane impeller, shaft sleeve, balance disc wear parts, such as when wear is too large, should change in time:

parking parking should be shut down before the pressure gauge cocks, slowly closing outlet gate, waiting for export network closed to end to stop the motor, pump stopped after the closing of the pump suction net

D booster horizontal multistage pump balance disc can balance the axial thrust, depends on the centrifugal pump pressure difference on both sides of the balance disc, and able to take advantage of the position of the balance disc and balance with q gap change automatically to maintain the pressure difference, generating force and axial thrust balance, this also is domestic multistage centrifugal pump the common principle of the balancing disc axial force.

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