WhatsApp Image 2022-12-25 at 14.42.01

Manufacture of 2.2 MW electric motor for pelletizing mills by domestic manufacturers

Manufacture of 2.2 MW electric motor for pelletizing mills by domestic manufacturers

ساخت موتور ۲٫۲ مگاوات

According to the Steel Reporter, Mohammad Khodabandeh, Head of Electrical and instrument Repairs of the Pelletizing Unit announced that: “For the first time, one of the mill motors of Line No. 1 of the Pelletizing Unit was replaced with a domestic motor by installation during the last 13 stoppage (cold line) days successfully brought up to line of operation. Explaining the motors used in each of the pelletizing unit’s mills, he added: “Each of these mills has two 2.2 MW motors with rotation speed of 1000 rpm and a rotor weight of 12 tons, yielding the driving force to rotate the mill container at a speed of 13.9 rpm through a gearbox and pinion.

The mill container with a diameter of 5.2 meters contains more than 200 tons of steel pellets with a size of 30 to 40 mm. According to the interior design of the mill container and its equipment, every hour, 240 tons of grit concentrate that is transformed from 95% granulation under 1 mm to 80% granulation under 45 microns and reaches the appropriate granulation for crude pellet formation.

According to this report, Rahmatollah Soltani, foreman of electrical and instruments repairs of pelletizing unit, also noted: this motor was manufactured domestically instead of foreign one by Roshd Sanat Niroo (RSN) Company in coordination with the spare parts purchase management department and technical office of iron making repair department. During the manufacturing process of this motor, production-line inspections and various performance tests were performed in Roshd Sanat Niroo Plant with the cooperation of the electrical specialists of the pelletizing unit and the technical office of iron making repair and also the spare parts purchase experts. By ensuring the correct operation of the motor, it was transported to Mobarakeh Steel Complex and the necessary planning was performed to install and run the motor at the stoppage of the pelletizing unit in July. This great measure was carried out with the support of the iron making management, follow-up of pelletizing unit personnel, spare parts purchasing management, pelletizing unit repair technical office, the support of the technical inspection manager, constructive opinions of electrical and rotary machinery department and RSN. At the end, it is necessary to thank and appreciate the cooperation of the procurement units, technical inspection, repair office and support of the iron making and procurement managers.

Click to view “Selected Products of Roshd Sanat Niroo Company”

To send comments, first fill the form and then send.

مفاهیم-اولیه-ارتعاشات-300x162

Vibrations and vibration analysis

Vibrations and vibration analysis

Mechanical vibrations are a type of movement of dynamic systems in the form of oscillation and are repeated over a period of time. In the simplest form, this type of movement can be simulated with a weight and a spring. By changing the initial position of the weight attached to the spring and releasing it, an oscillating motion occurs, the amplitude of which can be expressed by a sine function.

In general, there are two types of static and dynamic forces in machines. Vibrating forces are a type of dynamic force created by the presence of defects in the machine. Some areas of deficiency (deviation from the ideal state) include:

  • Design limitations
  • Manufacturing restrictions
  • Errors in initial installation
  • Operation errors
  • Issues during repairs

Since it is not possible to reach the ideal state, there is always limited vibration in the machinery, which is allowed. However, over time and due to the occurrence of subsequent defects, the amplitude of vibrations may increase over the allowable limit, which can be restored by analyzing the vibrations and taking appropriate corrective measures.

You can find out more about the basic vibration concepts and vibration analysis by downloading and reading the following articles.

To send comments, first fill the form and then send.

88888-1

Production of high voltage explosion-proof electric motor

Production of high voltage explosion-proof electric motor

ac electric motors for sale

According to the provincial group of the Young Journalists Club of Qazvin, the Public Relations and International Affairs of Qazvin Science and Technology Park announced: This product was designed and manufactured by one of the private sector Knowledge-based units located in this park, which has entered the industrial production stage.

One of the most important applications of explosion-proof electric motors is in petrochemical, oil and gas industries, which due to the lack of domestic manufacturers, especially at medium voltage and high voltage, similar foreign models were used and now this product can be produced in the country.

This knowledge-based unit, in addition to active factories in Hashtgerd industrial city, owns an active research and development unit in the province’s science and technology park. Using experts in the fields of electric, mechanic and metallurgy, it has produced electrical machines needed by the country’s heavy industries, including oil, gas and petrochemicals, cement, power plants, mines and metals.

Source: Young Journalists Club

To send comments, first fill the form and then send.