Suspension Overhead Crane‌

If you are faced with a limitation in the space between the load beam and the ceiling of the hall to use overhead cranes, the suspension crane is the best choice for you; Damavand designs and manufactures this category of cranes from 1 to 12 tons and up to 18 meters in span. The crane structures are designed according to the Din4132 and the AWS D14-1 standards and are manufactured according to the latest technology in equipped workshops. The materials used in these cranes are S235JR-S275JR-S355JR. Suspension overhead cranes are very similar to single-girder cranes; their difference is in the type of End carriage connections. This type of crane is used in all light industries, especially warehouses and light halls. Sometimes this crane is also used as a repair crane in heavy industries.

What is a suspension overhead crane?

A suspension overhead crane is a type of crane that consists of two End carriages and usually one load-bearing beam (crane girder). Its difference from a single-girder crane is that in this crane, the End carriages are connected to the hall girders from below and move under them, while in single-girder cranes, the End carriages are placed from the top and on the girders and move along the hall. The shape and method of connecting these components vary depending on the conditions of the workshop and the designer changes it according to the customer's needs. In this type of crane, the winch is usually installed under the girder in a suspended manner or next to the girder in a suspended manner (low head room) and moves along the girder. The End carriages move under the hall rails (girder) by at least four steel wheels, which are usually two drive wheels (with a gearbox motor) and two moving wheels. The number of crane wheels, both driving and moving, depends on the conditions of the workshop and the design made by the crane designer. The advantage of using this type of crane is the maximum increase in the range of movement along the length of the girder. Given the design of the suspension crane, girders can be extended to the closest distance to the wall or columns. The hoist can also be very close to the walls. Another advantage of this crane is the possibility of installing it in places such as basements that have concrete structures and do not have proper provisions for installing the crane. This type of crane has six movements (6 functions): up and down movement of the hoist hook (2 functions), left and right movement of the hoist winch (2 functions), and backward and forward movement of the entire crane girder along the length of the hall (2 functions). The combination of these 6 movements is possible with the help of the design of electrical circuits in the crane's electrical panel.

Application of Suspension Overhead Crane

In some halls, the distance from the carrier beam to the ceiling is small. In this case, the use of overhead cranes is not possible or requires a very special design. Also, the position of some equipment may have changed during the operation of the hall and a crane device needs to be installed locally to move the equipment. Therefore, a suspension crane will be a good option in such spaces. As mentioned earlier, another reason is the wider range of transverse movement of the end carriage. This feature can be very important in halls. Suspension cranes are most often used in warehouses and halls with truss ceilings. This type can even be used at the entrance to halls.

Types of Suspension Overhead Cranes

The difference and variety of suspension cranes is mainly in the type of connection of the girder to the end carriage and also the length of the relative consoles. This difference is related to the specific conditions of the hall in which the crane must be installed.

Suspension overhead crane components

This crane also has three main parts: the winch part, the girder part, and the End carriage part. The End carriage and hoist part includes the motor, gearbox, wire rope, hook, and other related components. The girder part includes the girder beam, electrical panel, and components of the transverse power supply system. In the last part of the End carriage, the wheels, the bumper, and the longitudinal actuators are located.

Suspension Overhead Crane Designing

Regarding the type of connection between the crane and the End carriage in a suspension overhead crane, there are certainly important points in the design of the girder and its other components. Considering the crane is suspended, the calculations and design of the type of connection of the girder to the head in this type of crane are very important. The length of the span, the type of head, the shock absorbers, the welding standard, the width of the sheets, and other design parameters in this type of crane have differences from its other models. Faratadbir Damavand in its brilliant history has been able to design and put into operation many samples of this type.

Suspension Overhead Crane Installation

After designing and manufacturing the crane, the final product is transported to the project site for installation. Damavand's assembly and commissioning team will assemble and install the crane at the desired location as soon as it arrives. This installation itself requires a high level of experience. The smallest error in installation can lead to irreparable damage. Also, the long life and need for less maintenance of the crane itself are the result of a good and standard installation. To improve quality and customer satisfaction and with an equipped and suitable workshop space, Damavand pre-assembles and pre-commissions all cranes at the factory before sending them to the customer to ensure the quality and accuracy of its product performance. After ensuring the quality, the manufactured product is loaded and to be sent for installation.

Suspension Overhead Crane Repairs and Maintenance

After installation and commissioning, the crane requires maintenance and inspection at certain intervals. Various parts of cranes such as wire ropes, wheels, and motors must be inspected and maintained regularly. The crane structure must also be inspected at specific intervals. This will increase the life of the crane and prevent damage and potential hazards. This is also necessary for electrical and electronic devices, shock absorbers, and girder wheels. Of course, every device needs repairs after a while. Usually, most of the breakdowns in cranes are related to consumable parts that must be replaced promptly. Also, parts usually break down due to improper use. Drives, gearboxes, electrical systems, etc. can lose their efficiency after a while for any reason. You can ensure that your crane is operating in good and safe condition by reading the crane repair and maintenance manual and performing timely inspection and maintenance in accordance with the standards and conditions stated in the manual.