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    Main performance parameters of crane

    Source: 2050us.com Release time: 2019/6/14 10:23:38
    Crane Main performance parameters:

    The main parameter of crane is the parameter that represents the main technical performance index of crane. It is the basis of crane design and the important basis for safety technology requirement of crane.

     Crane

    Lifting weight G
    Lifting weight refers to the quality of the lifting weight, the unit is kg or t. It can be divided into rated lifting weight, maximum lifting weight, total lifting weight, effective lifting weight and so on.
    Rated lifting weight Gn
    The rated lifting capacity is the sum of the lifting material of the crane, together with the quality of the hoisting gear or the subordinate gear, such as grab, electromagnetic sucker and balance beam.
    Total lifting weight Gz
    The total lifting weight is the sum of the quality of the hoisting material that can be lifted by the crane, together with the hoisting hanger and the hanger and the long play (including the hook, pulley block, lifting wire rope and other lifting objects below the lifting trolley) fixed on the crane for a long time.
    Effective lifting weight Gp
    The effective lifting weight is the net quality of the material that the crane can lift.
    The parameters need to be explained as follows:
    First, the lifting weights on the crane signs usually refer to the rated lifting weights of the cranes, which should be clearly expressed in the obvious position of the crane structure.
    Second, for the jib crane, its rated lift varies with the amplitude, and its lifting characteristic index is characterized by gravity moment. The value on the sign is the maximum weight.
    Third, a crane with a separable hanger (such as grab, electromagnetic sucker, balance beam, etc.), its lifting gear and the total weight of the total material quality of the material, allowing the quality of the lifting material to be effective lifting weight.
    Lifting height H
    Lifting height refers to the vertical distance between the top surface (or ground) of the crane running track and the limit position of the extraction device, and the unit is m. Usually when hooks are used to calculate the center of hooks and hooks, use the grab and other containers to calculate the bottom of the container.
    Drop depth h
    When the fetching device can be placed below the ground or the top surface of the track, the lowering distance is called falling depth. That is, the minimum distance between the lifting device and the horizontal supporting surface of the crane.
    Lifting range D
    The lifting range is the sum of lifting height and descending depth, that is, the vertical distance between the highest and lowest working position of the lifting device.
    Span S
    Span refers to the horizontal distance between the central line of the bridge type crane and the unit m.
    The distance between the center line of a car's running track of a bridge type crane is called the gauge of a car.
    The distance between the centerline of the derrick crane on the ground track is called the gauge of the crane.
    Range L
    The amplitude of the rotary arm crane is the horizontal distance between the rotating centerline and the plumbing line of the extraction device, and the unit is m. The amplitude of the non rotating type jib crane is the water level between the center line of the hanger and the rear axle of the boom or other typical axes.
    When the inclination of the boom is the smallest, or the maximum distance between the car and the center of the crane is the maximum, the minimum amplitude is the opposite.
    Working speed V
    Working speed refers to the steady operation speed of crane working mechanism under rated load.
    Lifting speed Vq
    The lifting speed refers to the vertical displacement speed of the rated load under the condition of stable operation of the crane, and the unit is m/min.
    Cart speed Vk
    The running speed of a cart is a running speed of a crane with a rated load on a horizontal road or track, with a unit of m/min.
    Car running speed Vt
    The running speed of a trolley refers to the running speed of a trolley carrying a rated load on a horizontal track in stable motion state, with a unit of m/min.
    Variable speed V1
    Luffing speed refers to the average horizontal velocity of the horizontal displacement suspended from the maximum amplitude to the minimum in the amplitude plane under the condition of steady movement, and the unit speed is m/min.
    The walking speed is V.
    Walking speed refers to the steady running speed of mobile cranes under the condition of road running, with the unit running at km/h.
    Rotation speed
    Rotation speed refers to the rotational speed of a crane around its center of rotation in stable motion state, with a unit of r/min.