The main performance parameters of tower crane
The main performance parameters of tower crane, how to know the technical parameters of tower crane?
Main performance parameters of tower crane(tower crane)
1, tower lifting weight G
1 & GT; .. Weight G-The mass of the weight lifted. The unit is T.
2 & GT; .. Rated lifting weight Gn-The sum of the weight allowed to be lifted by a crane together with the quality of the lifting gear.
3 & GT; .. Maximum lifting weight Gmax-Maximum allowable lifting weight under normal working conditions for cranes.
2, tower hanging L
1 & GT; .. L-The horizontal distance between the vertical center line and the rotary center line when the crane is placed in a horizontal field. The unit is M.
2 & GT; .. Maximum Lmax-When the crane is working, the angle of inclination of the arm frame is minimal or the range of the car at the outermost limit of the arm frame.
3 & GT; .. The minimum Lmin-the range at which the arm frame has the largest inclination or the car at the innermost limit of the arm frame.
3, tower lifting gravity moment M
The product of the amplitude L and the corresponding lifting object gravity Q is called the lifting moment in kN · M.
The lifting capacity of the tower crane is expressed by the lifting moment. It is based on the product of the maximum working range and the corresponding maximum lifting load as the weighing moment.
4, tower lifting height H
It refers to the vertical distance from the horizontal parking surface of the crane to the highest allowed position of the crane. The unit is M.
5, tower work speed
1 & GT; .. Up(down) speed Vn -- the vertical displacement speed of the rated load in a stable state of motion. The unit is m/min.
2 & GT; .. Crane(large car) operating speed Vk-stable movement state, the speed of the crane operation. The regulation is the operating speed of the crane with a rated load when the wind speed is less than 3m/s at a height of 10m from the ground on a horizontal road(or horizontal rail).
3 & GT; .. The speed of the car running Vt -- the speed of the car running in a stable state of motion. It is stipulated that at a height of 10m from the ground and the wind speed is less than 3m/s, the speed of the car with rated load is running on the horizontal track.
4 & GT; .. Variable velocity Vr -- the average velocity of the horizontal displacement of the rated load in the variable amplitude plane under stable motion. It is stipulated that at a height of 10m from the ground and the wind speed is less than 3m/s, the average speed of the crane on the horizontal plane from the maximum to the minimum.
5 & GT; .. Rotation speed W -- the rotation speed of the rotating part of the crane in a stable state of motion. It is stipulated that when the wind speed is less than 3m/s at a height of 10m from the ground on the horizontal site, the crane has the largest amplitude and the speed at rated load. The unit is rpm.
6, tower suspension gauge or wheelbase K
For arm-frame cranes other than railway cranes, it is the horizontal distance between the rail center line or the center line of the crane walking wheel tread(or track). The unit is M.
7, Crane total quality Go
It includes the sum of the mass of each part of the crane, including pressure, balance, fuel, oil, lubricant, and water. The unit is T.
the crane achieve balance
Answer:
When the object rises, the gravitational action line does not move, so the force arm is unchanged.
First of all, when the tower is installed, the arm will be 7 degrees upwards. When the pointed force reaches the range of bearing, the angle between the upper arm and the tower body is 90 degrees, so the tower crane is not flat, and then the tower cap is triangular between the balance arm and the arm suspension point. Therefore, in the lifting can be relatively stable!
Secondly, the tower is fixed and attached, so the tower is particularly stable and firm. The tower crane is unbalanced under static weight, which is also what the tower crane can withstand. The objects that are hung under the operating state turn forward faster and faster, which means that the tower crane is nearly balanced.
The connection between the balance arm and the arm is active. It can be automatically balanced by the pull of the auxiliary arm. You have the opportunity to experience it on your own.
