Single side Rail Trolley Wheel set

Description:
Wheel set is an important part of the composition of the crane, rolling operation on the track, and bear the crane self-weight and lifting load. Crane wheel material should have high strength, high hardness and good performance. Currently forged and rolled wheels are usually made of 65Mn and CL60. crane wheels are generally delivered after quenching + tempering treatment. Crane wheels made of 65Mn are better. 65Mn has more chemical elements such as manganese, nickel and copper. Manganese as the main metal element to improve the hardenability, so that the material surface decarburisation tendency is small, the heat treatment of the material after the mechanical properties of better. In addition, most of the manganese dissolved in ferrite, the formation of replacement solid solution, and make ferrite strengthened.

Wheel set bearing support adopts angle box structure, through the bolt will be fixed in the angle box small frame or car end beam on the curved plate, the structure can be used in the use of maintenance when adjusting the wheel, wheel horizontal deflection and vertical deflection to avoid the wheel gnawing rail, angle box structure for the domestic application of the mature technology. The selection of wheel diameter and material is based on the consideration of large supporting force of wheels under unfavourable working condition to ensure that there will not be overloading of some wheels. Wheel block bearing support adopts 45°split structure, firstly, the half ring of the bearing support is welded on the frame of the small car or the end beam of the big car, and then the half ring and the bearing box circle are processed as a whole to match the surface, so as to ensure the assembly precision of the wheels and the horizontal and vertical deflection of the wheels, and then install the wheel block, which is a commonly adopted technology in recent years in China according to the convenience of installation and dismantling, high assembly precision, and stable operation.

Wheel set classification:
The rimless wheel is easy to process, used for offset trolley running, no directionality;
Single-rimmed wheel processing is easier, used for trolley running, better directionality. (Outer edge for crane trolley running, inner edge for train running);
Double-rimmed wheels are troublesome to process, used for large trolley running, directionality.

Wheel set material:
Cast steel wheels, cast 55 wheels, cast 50SiMn wheels, cast 42CrMo wheels.
Forged steel wheels, forged 60 wheels, forged 42CrMo wheels, forged 65Mn wheels.

Overhaul of travelling wheel set, inspection content:
1. Check the wear and tear of the wheels;
2. Check the fit of wheels and shafts;
3. The wheels should be replaced when there are the following conditions:
(1) The uniform wear of the rolling surface of the wheel reaches 15-20% of the thickness of the original wheel rim;
(2) Wheel rim wear amounts to more than 60% of the original thickness;
(3) Wheel rolling surface has uneven wear or fatigue spalling to form unevenness;
(4) Quality requirements for new wheels;
(5) The wheel should not have cracks; the rolling surface should be smooth without uneven parts.

Quality requirements of wheel sets:
1. The wheel and axle should be firmly matched, and its swing should not be more than 0.10mm;
2. The inclination of the wheel in the vertical direction is not more than 1mm;
3. The support plane of the two bearing boxes of the wheel should be parallel to the centre plane of the wheel width, and its deviation should not be more than 0.07mm;
4. The position of the wheel shall be such that the centre plane of its width shall be in line with the centre of symmetry of the two bearing boxes.