The Hägglunds CA radial piston hydraulic motor series was developed for a very specific purpose: to provide a tough and powerful solution for heavy-duty applications where size and weight are significant issues. The result is a really compact hydraulic drive with the same durability, excellent performance and reliability as other Hägglunds motors from Bosch Rexroth. With its small envelope size and lightweight, the Hägglunds CA has an excellent power to weight ratio.
Now, after an extensive period of development, testing and validation, Hägglunds is releasing the largest model yet in the series – the new CA280 – which is now ready for mining and other industrial applications. Hägglunds’ Daniel Kajhager, Head of Global Engineering states: “The focus has been clear: delivering high torque in a compact format, without compromising on robustness or reliability.”
The CA platform is built for demanding applications where space is limited, but performance cannot be compromised. This new size takes that capability even further. Applications in mining are varied from raise boring rigs to apron feeders and heavy duty belt conveyors.
Popular features of the Hägglunds CA motor are for example the numerous mounting options, the very useful through hole and the insensitivity to shock loads. “When matched to your needs Hägglunds CA provides real competitive advantages in your plant operations.”
Bosch Rexroth‘s hydraulic industrial motor Hägglunds CA is of the radial piston type with a rotating cylinder block/hollow shaft and a stationary housing. The cylinder block is mounted in fixed roller bearings in the housing. An even number of pistons are radially located in bores inside the cylinder block, and the distributor directs the incoming and outgoing oil to and from the working pistons. Each piston is working against a cam roller.
When the hydraulic pressure is acting on the pistons, the cam rollers are pushed against the slope on the cam ring that is rigidly connected to the housing, thereby producing a torque. The cam rollers transfer the reaction force to the pistons which are guided in the cylinder block. Rotation therefore occurs, and the torque available is proportional to the pressure in the system.
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