Equipment for perfect fan balancing. Machine model 9D718i
The model 9D718i balancing machine is versatile equipment adapted to work with parts of fan and pump units and capable of effectively balancing parts of transmission mechanisms of any industrial equipment. That is why this model of the machine is so popular in the repair shops of many manufacturing enterprises.
Series 9D balancing machines are comfortable to work with, functional, versatile and very productive. That’s why they are also appreciated in production facilities with serial production.
This series of machines can be used to balance such parts:
- Impellers of smoke pumps;
- Fans impeller;
- Centrifugal compressor rotor;
- Centrifuges;
- Compressor Rotor;
- Gas blower rotor;
- Pump impellers;
- Impellers;
- Blowers;
- Pumps;
- Fan Wheels;
- Blowers, motor armatures, gears, pulleys, etc.
The Model 9D718i of the 9D series of balancing machines has the same design and features as the other equipment in the series (to learn more, read the “9D Series Machines” article on this site). However, it differs in some features, including the “static-moment balancing” feature. “Disc-shaped” parts often have both “static” and “moment” unbalance. When “static” unbalance is eliminated, “moment” unbalance increases, and vice versa, due to asymmetry in the shape of the part or misalignment during assembly. The close proximity of the correction planes of the part increases their mutual influence. The Static Torque Balance function solves this problem by determining the magnitude and position of the “momentary” and “static” unbalance. This feature is unique and available only on our machines.
Model 9D718i machines are usually equipped with an “axial drive” or a combined version with two drives. This is due to the high aerodynamic resistance of the ventilator or pump parts that need to be balanced. “Axial drive” ignores these part properties due to the rigid coupling of the motor to the product to be balanced, thus eliminating balancing errors due to slippage. In addition, “axial drive” allows for shorter balance cycles and reduced acceleration and deceleration times.
- The use of balancing mandrels eliminates a shift of the part axis from the rotary axis and, as a consequence, the appearance of a “false” imbalance. The part is mounted vertically on the mandrel, preventing the product from moving to one side, which can occur when mounted on a horizontally positioned spindle under the action of gravity;
- The horizontal axis of rotation makes the equipment versatile for balancing parts of all types and designs. The machine is capable of performing complete balancing including impellers, motor shafts, pulleys, cooling vanes, transmission gears and other machine components;
- Protective brackets with radial stops provide collective protection and selective balancing of the assembled impeller and motor shaft. The product in this case is a cantilevered rotor whose center of gravity is located behind the supports, which can cause the part to tip over. Radial stops with the “MOVING ROLLER” design hold the part and do not introduce balancing errors;
- The “Axial stops” when using the “belt drive” limit the displacement of the rotor due to aerodynamic forces allowing a safe and error-free balancing of parts with a high degree of accuracy.
Functions and features of the PAK-1 balancing system :
- Drilling depth calculation allows you to accurately determine the diameter and depth of hole needed to compensate for part unbalance. This feature is particularly useful for parts where the walls cannot be opened up to preserve their characteristics;
- Unbalance distribution on the correction plane is an essential function in the selective balancing of multistage shafts with pump or fan impellers. Typically, the shaft runs in the housing with little clearance between the housing and the impellers. When large unbalance needs to be corrected, the use of a large correction weight can interfere with the operation of the unit. This feature divides the unbalance over several impellers, reducing the amount of corrective weights.
- The balancing history allows you to evaluate the progress of the balance after an unbalance correction by viewing previous measurement results. This gives you the opportunity to improve the quality of your work by analyzing your mistakes.
Main Specifications
| Parameters |
9D718i |
| Balancing rotors weight range, kg |
5 – 500 |
| Maximum rotor diameter (over the bed), mm |
1300 |
| Rotor bearin journals diameter, mm |
30 – 180 |
| Distance between rotor bearing journal centers, mm, min/max |
200 – 2000 |
| Support type |
|
| Minimal achievable residual specific unbalance, gmm/kg |
0,4 |
| Rotor rotation speed range, rpm |
300 – 1500 |
| Drive type |
Frequency-controlled asynchronous electric drive |
| Electric motor power, kW |
2,2 |
| Drive gear type |
Belt |
| Equipment |
Balancing device |
| Bed length, mm |
1600 |
* The parameter can be changed as per the customer’s request
MACHINES CAN BE DELIVERED WITH
AXIAL (CARDAN) DRIVE PARTS;
A BELT DRIVE PARTS – OPTIONAL;
COMBINED – OPTIONAL.
| The operation manual on the machine with acceptance tests reports and the basic electric circuit |
1 pc. |
| The operation manual on balancing system |
1 pc. |
