Five technical parameters of crane

First, the lifting weight G

Lifting weight refers to the mass of the lifting weight, in units of kg or t. Can be divided into rated lifting capacity, maximum lifting capacity, total lifting weight, effective lifting weight and so on.

1. Rated lifting weight Gn

The rated lifting capacity is the sum of the materials that can be lifted by the crane together with the separable spreaders or attachments (such as grabs, electromagnetic chucks, balance beams, etc.).

2. Total lifting weight Gz

The total lifting weight is the sum of the mass of the crane that can be lifted together with the spreader and the spreader and the long-term fixed crane (including hooks, pulley blocks, hoisting ropes and other lifting objects below the lifting trolley). .

3. Effective lifting weight Gp

The effective lifting capacity is the net mass of the material that the crane can lift.

This parameter needs to be explained as follows:

First, the lifting weight on the crane sign is usually the rated lifting capacity of the crane and should be prominently indicated in the obvious position of the crane structure.

Second, for boom type cranes, the rated lifting capacity varies with the amplitude, and the lifting characteristics are characterized by the lifting torque. The value calibrated on the label is the maximum lifting capacity.

Third, cranes with separable spreaders (such as grabs, electromagnetic chucks, balance beams, etc.), their spreaders and material quality of the overall service rated lifting capacity, allowing the quality of the lifting materials to be effective lifting capacity.

Second, the lifting height H

Lifting height refers to the vertical distance of the top surface (or ground) of the crane running track to the extreme position on the pick-up device, in m. When the hook is usually used, the center of the hook and hook ring is counted; when the grab and other containers are used, the bottom of the container is counted.

1. Depth of depth h

When the take-up device can be placed on the ground or below the top surface of the track, the drop distance is called the descent depth. That is, the vertical distance between the lowest working position of the spreader and the horizontal bearing surface of the crane.

2, lifting range D

The lifting range is the sum of the lifting height and the falling depth, that is, the vertical distance between the highest and lowest working positions of the spreader.

Third, span S

Span refers to the horizontal distance between the centerline of the running track of a bridge type crane, in m.

The distance between the centerline of the trolley running track of the bridge type crane is called the gauge of the trolley.

The distance between the centerline of the running track of a boom-type crane running on the ground is called the gauge of the crane.

Fourth, the amplitude L

The amplitude of a rotating jib crane is the horizontal distance between the center of rotation and the plumb line of the pick-up device, in m. The amplitude of the non-rotating type of boom crane refers to the spreader center line to the boom

Water between the rear axle or other typical axis, flat distance.

When the boom inclination is the smallest or the distance between the trolley position and the swing center of the crane is the largest, the amplitude is the maximum amplitude; otherwise, the minimum amplitude.

V. Working speed V

Working speed refers to the speed at which the crane working mechanism runs stably under the rated load.

1. Lifting speed Vq

The lifting speed refers to the vertical displacement speed of the rated load of the crane under stable operation, and the unit is m/min.

2. Car running speed Vk

The running speed of the cart refers to the running speed of the crane with the rated load on the horizontal road or track, in m/min.

3. Car running speed Vt

The running speed of the trolley refers to the running speed of the trolley with the rated load on the horizontal rail under stable motion, and the unit is m/min.

4. Variable speed V1

The variable amplitude is the horizontal displacement average linear velocity from the maximum amplitude to the minimum amplitude, in m/min, under the steady motion state.

5. Walking speed V.

The walking speed refers to the smooth running speed of the rated load of the mobile crane hanging under the road driving state, the unit is km/ho

6. Rotation speed ω

The rotational speed refers to the rotational speed of the crane around its center of rotation under steady motion, in units of r/min.