Was established in 1998, is a collection of r & dproduction, trade as one of the high-tech company, the company specializes in manufacturing various micro-motor shaft...
Was established in 1998, is a collection of r &d production, trade as one of the high-tech company, the company specializes in manufacturing various micro-motor shaft...
Our machine including large CNC lathe, CNC machining center, CNC centerless grinding machine, CNC Incisive grinding machine, CNC cylindrical grinding machine, heat treatment machine.
There are various methods for balancing the axial force of the pump rotor. For example, a thrust bearing is arranged externally, a balance hole or a balance pipe is arranged on the pump cavity to reduce the pump pressure, and the impeller is designed to adopt pump shaft a back blade, a double impeller, and an impeller symmetric distribution. And use the balance disc, balance drum structure, and the like. Among them, the balance wheel and the balance drum structure are used to balance the axial force of the rotor.
The balance disc is widely used in the axial force balance of the multi-stage pump, which is located behind the impeller of the pump stage. The structural principle is shown in Figure 1. The balance device has two gaps, radial and axial, and the pressurized liquid flowing out from the final stage flows into the cavity in front of the balance disc through the radial gap to form a high pressure state. A balance tube is opened on the cavity on the rear side of the balance disc, and communicates with the inlet of the water pump, so that the pressure in the cavity is substantially the same as the pressure at the inlet of the pump. Since the pressures in the two cavities before and after the balance disc are not equal, a pressure difference is formed, and a balance force which is opposite to the axial force is generated to achieve a balance effect.
When the balance plate structure is used to balance the axial force of the pump rotor, the balance force changes as the axial force changes continuously. Therefore, the working process is a dynamic balancing process. The balance disc automatically adjusts the variable gap size by the rotation of the rotor, thereby adjusting the balance force, and can fully balance the axial force of the rotor without relying on external thrust bearing assistance, so the balance structure can omit the external thrust bearing.
Analysis of pump shaft wear causes
Normal metal fatigue wear: Since the water ring vacuum pump is in a high load working state, the metal fatigue characteristics of the metal itself will be manifested in a certain period, resulting in a gap between the bearing and the shaft mating surface. pump shaft It will lead to the matching clearance during the operation, the relative movement of the bearing and the shaft surface, and the severe wear of the shaft or the bearing chamber in a short time;
Machining size error: If the interference between the rotor shaft and the bearing is too small or the contact contact area is too small, there will be a gap between the bearing and the rotor shaft under the heavy load of the vacuum pump;
Maintenance and repair: maintenance and maintenance are not timely or irregular, bearing lubrication is insufficient, bearing axial positioning control or axial expansion and contraction of the reserved equipment causes the bearing clearance to increase, which will also cause the shaft and bearing to sway and wear. .
Enter your e-mail above to facilitate contact us, you can fill in the second space inside the product name or model, we can also do OEM.
