A large number of hydraulically operated cranes are used for municipal building and industrial production as the first line, playing an increasingly significant role, as urban economic construction has developed rapidly in recent years. Therefore, it is essential to understand the construction, common mistakes, and dimensions of truck cranes.
One type of crane is a truck crane that is attached to a standard or unique vehicle chassis; the crane cab and driving cab are provided separately. The truck has numerous benefits, including mobility, quick switching, suitability for highway driving, high job performance, a relatively simple structure, cost-effectiveness, a reduced need for job aids, and the ability to change the working height and amplitude at any time. The boom truck’s disadvantages include the need for leg support while it is working, strict ground flatness requirements, and inability to operate on soft ground. But it can accommodate the vast majority of circumstances for contemporary urban construction. The truck crane is the most common and has the largest output at the moment, with a lifting capacity ranging from 8 tons to 1,500 tons.
The crane can be roughly divided into two parts: the upper part and the lower part. These are the operating portion and the supporting base portion. The supporting base not only includes chassis that can travel on roads, frame legs, and other load-bearing structures, but also chassis that can power the upper part through center rotors; the upper part includes rotating bodies made up of rotating supports that can rotate 360 degrees, rotating gear, and rotating hydraulic truck system; the amplitude of the change mechanism is made up of varying amplitude cylinders, hydraulic truck system components, and hoistin
The hydraulic system typically suffers from the most common crane faults, so it’s important to understand some of these faults, as well as maintenance precautions and techniques.
All suspension load actions are driven by the truck system to be completed, and the hydraulic system is the key component of the crane. An essential criterion for assessing crane quality is the hydraulic system that controls the performance of the hydraulic crane.
Upper hydraulic systems and lower hydraulic systems can be distinguished based on how the crane truck’s truck system is distributed during assembly.
The upper system:
Amplitude loop: control stretching of varying amplitude cylinder to realize the ups and downs
Retractable Loop: This device allows you to control how far the telescopic boom stretches and retracts.
Rotation circuit: Manage the swing motor’s rotation to realize the full purpose of rotation.
Lifting circuit: encompassing both the principal and assistant lifting. To achieve the rise and fall of the main hook and auxiliary hook when hanging loads, control the rotation of the rotary motor.
The lower system:
Pump absorbs oil from the tank to create high-pressure oil, which powers the entire system. The system’s beating center is it.
To ensure stability when the cranes are in use, the support leg loop controls the telescoping of nine supporting leg cylinders (four horizontal and five vertical).