The test results of the imported bearings show that the bearing body material is 35CrMo, and the bearing lining material is tin-bismuth bearing alloy. 35CrMo material is characterized by high durability and Confucian strength at high temperature, good low temperature toughness, working temperature up to 500 ° C, low temperature up to -110 ° C, and high static strength, impact toughness and higher The fatigue strength and the quenching deformation are small. The tin-bismuth bearing alloy material is characterized by good compliance, bite resistance and corrosion resistance. The main parameters are:

=25MPa, = 80m / s, the maximum working temperature is 150 ° C, the hardness is 20 ~ 30HB.

In addition, in order to make the bearing alloy have better wear resistance and corrosion resistance, the content of niobium was increased from 10.96% to 11.36% in the development. At the same time, in order to ensure the quality of the bearing and the lining, the bearing lining is made of centrifugally cast bearing alloy, which improves the casting quality. The bearing body is ultrasonically flawed and the lining is magnetic particle inspection.

The successful development of the domestically produced bearings solved the shortage of imported pump parts and achieved great economic and social benefits. Save money on buying imported bearings. The price of imported bearings is 70,000 yuan per pair, while the price of domestic bearings is 22,000 yuan, which is more than 2 times, which can directly save more than 60% of the cost of purchasing spare parts. Due to the convenience of domestic manufacturing, it can be supplied at any time, reducing inventory pressure and improving the utilization of funds.

The successful development of domestically produced bearings has solved the key problems for the development of new products in the domestic electromechanical industry. Equipment of the same size can reduce cooling facilities, reduce system complexity, and reduce manufacturing and maintenance costs in future designs. The product can also be used in similar rotary equipment.

(Finish)

Slewing Mechanism and Spare Parts

A slewing mechanism is an essential component of a Tower Crane that allows it to rotate horizontally. It enables the crane to reach different areas of a construction site without having to move the entire structure.

The slewing mechanism typically consists of the following components:

1. Slewing Ring: The slewing ring is a large circular bearing that supports the entire weight of the crane and allows it to rotate. It is usually located at the base of the crane and is designed to withstand heavy loads and provide smooth rotation.

2. Slewing Motor: The slewing motor is responsible for providing the necessary power to rotate the crane. It is connected to the slewing ring and is controlled by the crane operator.

3. Gear Mechanism: The gear mechanism consists of a set of gears that transmit the power from the slewing motor to the slewing ring. It ensures smooth and controlled rotation of the crane.

4. Brake System: The brake system is an important safety feature of the slewing mechanism. It is designed to hold the crane in place and prevent any unintended rotation when the crane is not in operation.

5. Control System: The control system allows the crane operator to control the rotation of the crane. It typically includes joysticks or buttons that enable the operator to start, stop, and control the speed and direction of rotation.

Overall, the slewing mechanism plays a crucial role in the functionality and versatility of a tower crane. It allows the crane to move horizontally, reach different areas of a construction site, and perform various lifting tasks efficiently.


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