Self-balancing pump is known as the self-balancing multistage pump. The pump is a new structure, high efficient pump. It has two or more than two impellers and the discharge stage is in the middle of the positive and reverse impellers, and the impellers are are arranged symmetrically.
Advantages:
(1) The symmetrically impellers make the axial thrust balanced out and no axial movement.
(2) Without balancing disc system, self-balancing multistage pump solves various faults due to failures of balancing device such as balancing plate and ring wearing and locking of rotor parts. Impellers and guide vanes always in their positions under any circumstances, which make longer service life of pump. The safety operation time is more than 3 times of the conventional one.
(3) There is no water return loss due to the self-balancing structure design. The performance parameters is 100% meet the designing requirements, and the efficiency has been raised 4-14%, and shaft power has been reduced. Thus the operation cost has been reduced in an obvious way.
(4) Since there is no axial turbulence, the contact effect of mechanical seal dynamic and static ring is good when the pump starts and stops, which overcomes the defects that the mechanical seal dynamic and static ring of conventional multistage pump can not be return to its position in time , and the mechanical seal life is extended by 2-3 times.
(5) The self-balancing axial force loads minimize the pump wear and system interference. The residual axial force of a very small part is absorbed by the thrust bearing, so that the pump shaft is always in the tension state, and the force of the shaft is even, which Increasing the rigidity and critical speed of the pump rotor, as well as smoothness and reliability of rotor operation.
(6) The structure of the bearing body is changed, and the splash oil bath is used for lubrication. This lubrication method is safe and reliable, the heat dissipation performance is good, the oil level is visible, and it is very easy to add and replace .As long as the oil (or turbine oil) is refilled and replaced as required, there will be no burning of the bearing and the service life of the bearing will be prolonged. (conventional multistage pumps are grease-lubricated, which is volatile, heats up quickly, oil level invisible, and is difficult to add.)
(7) Due to the good positioning of the mechanical seal and the change of the structure of the bearing body, the cooling range of the pump can be increased by 200 °C by add the cooling device. (Conventional one less than 120°C)
