9D718F

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Equipment for perfect fan balancing. Machine model 9D718F

The model 9D718F 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;
Centrifugal compressor rotor;
Centrifuges;
Compressor Rotor;
Gas blower rotor;

Pump impellers;
Impellers;
Blowers;
Pumps;
Fan Wheels;
Blowers, motor armatures, gears, pulleys, etc.

The Model 9D718F 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 9D718F 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	9D718F
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.

PRODUCT HIGHLIGHTS

Design features of the machine

The unique micro-tuning mechanism ® technology eliminates the “thread” effect (when the rotor moves axially) on the fan balancing machine.

The supports are set relative to the bed with a chain mechanical drive, this simplifies the setup process.

The special design of the supports allows you to install the rotor without paying attention to its length, the only limitation is the width of the “drive belt” and the length of the bed. (By special order, the bed can be made under the rotor of any length).

The “belt drive” has the patented LONG STROKE ® design which allows with just two drive belts to balance any rotor.

An alternative to a “belt drive” is an “axial drive”, which uses a cardan shaft that is capable of transmitting large torque from the electric motor to the rotor. Such a drive is used for parts with high aerodynamic drag. The axial drive of all machines of the 9D series is equipped with a full-fledged quill.

By special order, it is possible to order a combined version of the machine (with two drives: axial and belt).

Belt drive provides versatility of the machine, large travel of tension pulley allows only one or two belts to be used. Belt installation does not require disassembly of the unit.

All electrical equipment is located in the cabinet, the outer cables are in metal hose. The assembly matches CE standarts.

Preconfigured frequency-controlled asynchronous electric drive allows control of the rotor speed, acceleration and deceleration process.

Safe working conditions on the machine are provided by rigid stops, protective covers of the drive belt and rotating pulleys, safety interlocks, ergonomic controls, etc.

PAK-1 BALANCING SYSTEM

Digital system is based on an industrial fanless computer with a touch screen and a measuring unit.

Set-up mode by “triple start-ups” method with the use of calibration weights on the serial rotors with initial unbalance.

Calibration of the machine is made by the operator enabling to reach the maximum sensitivity of the machine, thus exempting from the duty to pay annual calibration fees.

Calculation of the balance tolerance values in default of technical documentation for the balancing product.
Value calculation of the correction test weights to simplify the tuning process for the balancing rotor.
Real-time balancing display, i.e. if there is any defect or a hindrance of a rotor, it’s visible immediately as fluctuation in measurement result.
View of unbalance value in grams, gmm, gsm, gmm / kg optionally.
Taking into account the eccentricity of the balancing mandrel.

Unbalance distribution on n-planes correction
Calculation of hole depth for correction of unbalance.
Possibility of decomposition of correcting weights into structurally conditioned anchoring points (blades, fans, slots).
Rotor balancing report creating and printing.
USB port for printer connection, USB-flash memory, port for connecting to local network and Ethernet network.