Brief Introduction of Shougang Group

Shougang's production system includes coking, sintering, ironmaking, steelmaking and rolling, and the main production equipment has reached the international advanced level in the same industry.The annual production capacity of finished steel exceeds 3.2 million tons, including 1.2 million tons of ordinary hot-rolled wire rods and 2 million tons of high-speed non-torsion controlled cold-rolled wire rods.The main product is wire, which can produce ∮5.5-14mm wire products.According to the carbon content, it can be divided into low-carbon steel, medium-carbon steel and high-carbon steel, as well as special-purpose steel, including cold steel, welding rod steel, prestressed steel, spring steel, etc.Production of steel window wire, steel wire, steel strand, steel nails, welding rods, etc.

The reducer is a commonly used power transmission mechanism.The reduction mechanism reduces the higher speed to the required speed and obtains a larger torque.Among the mechanisms currently used to transmit power and motion, reducers are used in a wide range of applications.It can be seen in almost all types of mechanical transmission systems from ships, automobiles, locomotives, heavy machinery used in construction, processing machinery and automatic production equipment used in the machinery industry to household appliances, clocks and watches in daily life.The application of the reducer can be seen from the transmission of high power to the transmission of small loads and precise angle transmission.In industrial applications, reducers have the function of reducing speed and increasing torque.Therefore, it is widely used in speed and torque conversion equipment.The main functions of the reducer are:

(1) Reduce the speed and increase the output torque at the same time.The torque output ratio is the output of the motor multiplied by the reduction ratio, but it must not exceed the rated torque of the reducer.

(2) Deceleration reduces the inertia of the load at the same time, and the reduction of inertia is the square of the reduction ratio.

The common reducer types are: gear reducer, worm gear reducer, cycloid reducer, planetary gear reducer, stepless reducer, etc.

Reducers are widely used in steel production enterprises.At the same time, due to the relatively harsh use environment, problems such as wear of the bearing position in the bearing cavity and oil leakage on the joint surface of the reducer during operation sometimes occur.Due to the high automation and continuity of modern steel production, once the above problems occur, without advanced maintenance methods, it will inevitably cause waste of manpower and financial resources, and even the entire production line will stop production, causing major economic losses.

Case analysis of reducer maintenance:

Case 1: Wear of 650-ton cold shear bearing box

The bearing chamber of the cold shear reducer is worn.After the problem occurs, traditional methods cannot solve it on the spot.Repairs must be outsourced.This takes a long time to stop production and wastes valuable production time of the business.And, metal is used for repairing metal, and this can not change ' difficult to difficult ' coordination relation.Under the combined action of various forces, it will still cause wear and tear again.

Fushilan 2211F polymer composite material has super strong adhesion, excellent compressive strength and other comprehensive properties.The use of 2211F polymer composite can avoid disassembly and machining, and quickly and effectively repair the wear of the bearing cavity.That is, there is no thermal stress of repair welding, and the repair thickness is not limited.At the same time, the product has functions that metal materials do not have, which can absorb the shock and vibration of the equipment and avoid the possibility of re-wear.

Case 2: Wear of gear shaft diameter of 1450 rolling mill reducer

The bearing position of the gear shaft of the reducer is worn.After a problem occurs, it needs to be repaired according to traditional methods by welding or painting and machining.However, the thermal stress caused by the high temperature of repair welding cannot be completely eliminated, and it is easy to break during operation.The brush coating is limited by the thickness of the coating, and it is easy to peel off; and the above method uses metal to repair the metal, which cannot change the coordination relationship of 'hard to hard', and will still cause wear again under the joint action of various forces.

Fushilan 2211F metal repair material has super strong adhesion, excellent compressive strength and other comprehensive properties.It can repair the wear of gear shaft bearings by machining methods, that is, there is no thermal stress of repair welding, and the repair thickness is not limited.With the privilege that metal materials do not have, it can absorb the shock and vibration of equipment, avoid the possibility of re-wear, and greatly prolong the service life of equipment components (including bearings), saving a lot of downtime for enterprises and creating huge Economic value; it avoids scrapped replacement and optimizes maintenance resources within the enterprise.

Case 3: Brake shaft head wear and keyway damage of winch reducer for blast furnace

During the long-term operation of the winch reducer, the brake shaft head is worn and the keyway is damaged.After the problem occurs, the traditional method cannot be solved on the spot, and it must be repaired through outsourcing; and the metal is used to repair the metal, which cannot change 'difficult to difficult', under the joint action of various forces, the relationship between the two The matching relationship will still cause wear and tear again.

Fuschlan 2211F metal repair material has super strong adhesion, excellent compressive strength and other comprehensive properties.Use of Fuschlan polymer composites eliminates disassembly and machining, and quickly and effectively repairs worn shaft heads and keyways.That is, there is no thermal stress of repair welding, and the repair thickness is not limited.At the same time, the product has functions that metal materials do not have, which can absorb the shock and vibration of the equipment, and can be 100% in contact with the mating surface, thus avoiding the possibility of re-wear.

Case 4: Shaft head wear of single roll crusher reducer

The gear shaft head of the single roll crusher reducer is worn due to various factors.After a problem occurs, according to the traditional method, the size of the shaft head should be repaired by repair welding or brush plating.However, since the thermal stress caused by the high temperature of repair welding cannot be completely eliminated, the shaft is easy to break during operation.However, the electroplating and spraying of electric brushes are limited by thickness and are easy to peel off.

Fuschlan 2211F polymer composite has super strong adhesion, excellent compressive strength and other comprehensive properties.Use Fuschlan polymer composites to avoid disassembly and machining, and to quickly and effectively repair shaft head wear.That is, there is no thermal stress of repair welding, and the repair thickness is not limited.At the same time, the product has functions that metal materials do not have, can absorb the shock and vibration of the equipment, and can be in 100% contact with the mating surface, thus avoiding the possibility of re-wear.

Case 5: Leakage on the reducer joint surface

In the long-term operation of the reducer, due to vibration, wear, pressure, temperature and repeated disassembly and assembly, oil leakage at the static seal of each joint surface is very common, resulting in a large amount of oil waste and affecting the place of enterprise management .The traditional treatment method is to disassemble and open the reducer, replace the gasket or apply sealant, which is time-consuming and laborious, and it is difficult to ensure the sealing effect, and leakage will occur again during operation.

Use Fuschlan, Fuschlan 25551 fast-curing repair agent and Fuschlan 3223 high-strength modified polyurethane rubber composite materials and technology for on-site spill treatment without disassembly, use polymer composite materials to treat spills from the outside, save time and effort, and the effect is immediate .Its products have excellent adhesion, oil resistance and 350% elongation, overcome the influence of reducer vibration, and solve problems that have not been solved for many years.

1. Reducer leakage