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    Maintenance of various parts of cranes

    Source: 2050us.com Release time: 2019/8/28 10:00:29

    Crane Maintenance of various parts

    (1) crane To tell you that wheel tread wear and wheel tread wear exceed 15% of the original thickness, new parts should be replaced. The diameter of the wheel should be within the tolerance range. The surface hardened hardness is HB300~500. The thickness of the quenching layer with a wheel diameter greater than 400mm is greater than 20mm. When the diameter is less than 400mm, the thickness of the quenching layer should not be less than 15mm.

    (2) the diameter deviation of two matching wheels, the deviation of the diameter of the active wheels should not exceed 0.1% of nominal diameter, and the motor wheel shall not exceed 0.2%. The diameter deviation of the electric hoist wheel shall not exceed 1% of nominal diameter, and the wheel diameter of the electric locomotive should not exceed 0.2%; the deviation of the diameter of the electric hoist wheel shall not exceed 1% of nominal diameter;

    (3) flange wear and break, deformation: flange wear amount to 50% of original thickness or broken area exceeding 30mm2, scrap should be scrapped, flange thickness bending deformation reaches 20% of original thickness should be scrapped;

    (4) wheel crack: wheel cracks should be scrapped.

    (5) tread ellipticity: wheel tread oval degree up to 1mm should be scrapped.

    (6) Wheel group assembly: the installed wheel assembly should be flexible in rotation, and several wheels installed on the same balance frame are in the same vertical plane, allowing a deviation of 1mm.