What is the mechanical loss of the centrifugal image?
Moss: There are two parts to the mechanical loss of a centrifugal pump.
(1) Bearing and shaft seal friction loss: The pump shaft is supported on the bearing
A screw seal is provided to prevent the liquid in the pump from leaking out to the screw pump, and a shaft seal is provided. When the diaphragm pump rotates at high speed,
Friction with bearings and shaft seals. The size of the loss is related to the form and seal of the seal.
Slippery situation.
(2) Impeller disc friction loss: centrifugal pump impeller in liquid filled pump
Internal rotation, at this time, the outer surface of the impeller cover plate and the liquid friction with each other, causing friction damage
Missed. The size of the loss is related to the diameter of the impeller, the speed and the nature of the liquid being transported (density
It is related to the viscosity) gear pump, which can increase exponentially with the increase of the number of centrifugal pump stages. Processing fine
Degree also has a great impact on it.
What are the fire damage caused by centrifugal mulberry water 7
Moss; there are three aspects to the hydraulic loss of centrifugal pumps *
(1) Shock loss: When the pump works under the design flow conditions. No flow
The impact on the blade and the pump casing is higher at this time. But when the flow deviates from the design
Under working conditions, the direction of the liquid flow must deviate from the direction of the blades and the direction of the pump casing flow channel.
Away, causing an impact. This loss is proportional to the square of the flow rate or flow.
(2) Vortex loss: The cross-sectional area of the flow at the pump is very complicated.
Surface, when the liquid passes through here, the magnitude and direction of the flow rate are constantly changing.
As a result, eddy losses will inevitably occur. In addition, there is an overcurrent surface
Sharp corners, burrs, and dead corners also increase vortex loss.
(3) Flow friction resistance loss: due to the viscosity of the liquid and the overflow in the pump
The surface is rough, so frictional resistance is lost when the liquid flows.
What's the advantage of sliding shaft Yong?
Moss: (1) advantages of sliding bearings: reliable, stable and noise-free,
Can withstand large impact loads; Long use cycle: suitable for high speed, inspection
Slimming *
(2) Disadvantages of sliding bearings: complex structure * large volume; high requirements
Tile scraping and grinding technology; labor intensity during maintenance.