9D718
Hard-bearing balancing machine for heavy-weight rotors up to 3000 kg
Maximal weight, kg
Maximal diameter, mm
The machine model 9D718 is a universal balancing equipment of pre-resonance type, which allows to balance parts weighing from 30 to 3000 kg. The machine has a horizontal axis of rotation that allows to work with any types of rotors, therefore the equipment is widespread among representatives of repair shops and enterprises producing parts with serial, small-batch and single-unit production.
The 9D718 can be used to balance such parts:
- Shaft-type parts;
- Disc type parts without their own bearing journals (using a balancing mandrel);
- Cantilever-type parts (parts with most of their weight behind one of their supports);
- Parts or assemblies with their own bearings (when using optional accessories).
The 9D718 has a reinforced design and a high power electric drive system to handle heavy workpieces. Structurally the machine is the same as any other machine of the 9D series, but to increase the efficiency of the machine it is often available with additional modules such as “jacks for shock-free installation of parts” or with an “unbalance correction module”. The electric drive of the machine depends on the customer’s needs. When placing an order you can choose between “axial” or “belt” drive, which will transmit the torque from the motor to the workpiece. By special order, the machine can be equipped with both “axial” and “belt” drive, which increases the versatility and reliability of the machine.
The machine has a lot of know-how that allows efficient and fast changeovers, as well as sophisticated software that improves both comfort and quality of work of the machine operator. Depending on the customer’s production requirements, the balancing machine can be equipped with one of two balancing systems: PB-02M (balancing system based on the modern microprocessor technology) or PAK-1 (hardware-software complex working on the industrial computer with a touch screen).
- High accuracy 0,4 gmm/kg = 0,4 μm.
- Real-time balancing process.
- Short unbalance measurement time.
- Maximum machine sensitivity with operator-controlled setup and calibration.
- Large diameter spherical rollers.
- Measures large initial unbalances without damaging the machine.
- Belt drive design for rotating any rotor with two belts.
- Safe balancing at low speeds.
- Balancing of rotors with very short bearing journals thanks to narrow roller blocks.
- Smooth speed control and acceleration through a frequency inverter drive.
- Options: axial drive, extended machine base.
Industrial Application Features
- High initial unbalance handling capacity – Structural design accommodates rotors with significant initial unbalances including damaged or heavily worn components without machine damage. The robust construction enables large correction operations directly on the machine for enhanced productivity.
- Modular mounting system with spacers – Configurable support structure uses spacers and tooling for unusual rotor configurations. Modular design enables custom setups without compromising measurement precision.
- Own-bearing balancing capability – Support design enables balancing rotors in their original bearings without bearing replacement requirements. This capability reduces repair time and prevents potential trunnion damage during bearing removal operations.
- Disk and shaft type rotor compatibility – Mechanical configuration accommodates both disk-type components (impellers, blowers and fans) and shaft-type assemblies (drums, separators and centrifuges). The design flexibility enables handling diverse component geometries on single machine platform.
- Length-independent rotor mounting – Support design accommodates rotors of unlimited length within belt drive or bed constraints without compromising measurement precision. This flexibility enables handling of extended assemblies including metallurgical rolls and printing equipment shafts.
High Precision Balancing
- Precision roller assembly with advanced bearings – Rollers incorporate high-precision bearings manufactured using patented “exact barrel”® grinding technology. This design provides exceptional rotational accuracy and extends bearing life under continuous operation.
- High-precision vibration sensor – Sensor configuration optimized for medium-heavy rotor applications with micro-vibration sensitivity and external disturbance filtering. The mounting design provides maximum sensitivity throughout the extended operational envelope.
- Enhanced measurement stability for industrial environment – Support structure design provides vibration isolation from external sources while maintaining sensitivity to rotor-generated unbalances. This design ensures accurate measurements in demanding industrial workshop environments.
Mechanical Structure Design
- Monolithic support and base construction – Integrated design eliminates vibration losses during balancing by minimizing oscillation system components. This solid foundation ensures measurement accuracy and structural stability under dynamic loads.
- Hard-bearing design – Low natural resonance frequency of support structure enables balancing operations at reduced rotational speeds for enhanced safety with heavier rotors. This design characteristic reduces power requirements while maintaining measurement precision.
- Simple yet robust functional design – Streamlined mechanical architecture provides reliability while maintaining operational versatility for diverse rotor types. The design philosophy emphasizes functional effectiveness over complexity for enhanced maintainability.
- Narrow stand design with enhanced capacity – Compact support geometry maximizes workspace accessibility while providing structural rigidity for medium-heavy rotor applications. The narrow profile enables installation in constrained environments without sacrificing load-bearing capacity.
- Adjustable roller block height mechanism – Height-adjustable support system accommodates rotors with varying bearing journal diameters from 50-300mm. The adjustment mechanism enables precise rotor centering during machine setup.
- Wide roller design for journal accommodation – Extended roller width supports rotors with varying bearing journal lengths while maintaining stability during high-speed rotation. This design feature enables balancing of both compact and extended rotor assemblies.
- “MICRO-TUNING”® axial alignment technology – Specialized mechanism eliminates effects of axial misalignment during rotation. This technology maintains measurement accuracy regardless of slight rotor positioning variations.
Drive System Configuration
- Medium-capacity frequency-controlled drive – 15kW electric motor with power reserve design reduces acceleration and deceleration times. Frequency inverter provides infinitely variable speed control from 200-1000 rpm with smooth transitions
- Patented “LONG STROKE”® belt drive mechanism – Configuration with an extended stroke capability and only two drive belts can accommodate rotors with different drive surface diameters. This design provides consistent torque delivery while maintaining operational flexibility.
The PAK-1 unbalance measuring unit represents the latest generation of measuring complexes for dynamic balancing, combining high precision, stability, and ease of use. It’s designed to tackle a wide range of rotor balancing tasks, from simple to the most complex, requiring precise measurements.
Based on an industrial fanless computer with a touchscreen and a multi-channel measuring unit, the system ensures reliability and a long service life, even under intensive use. The PAK-1 utilizes a universal measuring path and modern component base, allowing for equally high accuracy when working with all types of rotors.
Its intuitive interface, self-calibration capability, and automation of key operations make the complex a convenient tool for both experienced specialists and beginners.
Features of the PAK-1 System:
- High-precision dynamic balancing for rotors of any configuration.
- Industrial fanless PC with touchscreen and multi-channel measuring unit.
- Setup using trial runs with calibration weights on production rotors.
- Self-calibration by the operator, eliminating annual service adjustment costs.
- Calculation of permissible unbalance values, even without technical documentation.
- Determination of control weight mass to simplify setup for a specific rotor.
- Real-time display of unbalance magnitude and angular position, including “highlighting” of the correction zone.
- Automatic measurement start upon reaching a set speed and automatic stop after cycle completion.
- Display of unbalance magnitude in grams, gmm, gcm, gmm/kg.
- Vector and exponential averaging for working with moving elements and in noisy conditions.
- Additional functions that significantly simplify the balancing process and expand the technological capabilities of the balancing machine.
- Generation and printing of balancing reports directly from the system.
- USB ports and Ethernet interfaces for connecting a printer, data storage, and integration into a local network.
|
Parameter |
Value |
|---|---|
|
Balancing rotors weight range, kg |
30 – 3000 |
|
Maximum rotor diameter (over the bed), mm |
2000 |
|
Distance between rotor bearing journal centers, mm, min/max |
470 – 3000 |
|
Rotor bearin journals diameter, mm |
50 – 300 |
|
Machine type |
Hard-bearing |
|
Support type |
Rollers |
|
Minimal achievable residual specific unbalance, gmm/kg |
0.4 |
|
Rotor rotation speed range, rpm |
250 – 1000 |
|
Drive type |
Belt |
|
Electric motor power, kW |
15 |
|
Power supply parameters |
400V ± 10%, 3 Ph, 50Hz ± 1 |
|
Balancing system |
PAK-1 |
|
Overall machine dimensions (length x width x height), mm |
4000 x 2100 x 1500 |
|
Machine weight, kg |
1800 |
- 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.
- Drive belt – 2 pc.
Extended machine base
Rotor jacks
