Bestons are Australian distributors of industrial brakes and clutches from a leading specialist in the industry, Ortlinghaus of Germany. These quality parts are used throughout industry around the world.
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Ortlinghaus mechanical clutches have been extremely popular and problem free for many years. They offer a free choice in terms of the selection of the friction combination and the method of generating the engagement force. They are supplied with the friction combinations steel/sintered lining and steel/organic lining and as a result are suitable for wet-running and dry-running, i.e. they can be used in either an open design or a closed design.
Engagement and disengagement of the clutches is by means of a 'sliding sleeve' with a cam profile which is moved axially over resilient angle levers, these in turn transmit the required force to the set of plates. A limited amount of plate wear is compensated for by the resilient bending of the levers so that the torque capable of being transmitted remains constant to a large extent and adjustment is only necessary after an extended period of time. The engaging/disengaging movement can be introduced by means of hand levers, pneumatic or hydraulic cylinders or electromechanical actuation systems.
Ortlinghaus multiplate safety clutches are permanently engaged, this condition being maintained by spring pressure. They are able to transmit torque up to a particular, preset level, after which in the case of an overload in the transmission, they are designed to slip for a limited period of time. They can thus be used to safeguard all types of transmission lines in machines and equipment from overloading and destruction. They have the task of smoothing out high torque peaks, at start ups, and during the operating of a line. This is done by the clutch plates slipping past each other for a short period of time when the desired maximum torque is reached.
With this functional principle, Ortlinghaus have succeeded in producing clutches with a torque of up to 230,000 Nm.
The torque at which a clutch starts to slip can be varied, within limits. In this way these clutches safeguard gear wheels, shafts and other drive elements from damage and thus guarantee operational reliability for an extended period of time; in this way they also help to prevent the need for repairs. It must be kept in mind that when the clutch is slipping, frictional heat is produced and released within the set of plates and that the permissible amount of heat is limited. This thermal loading must be kept within the required limit with the aid of a slip monitoring device, which would switch off the drive. This is necessary with fast running drives where the critical amount of heat is reached very rapidly when slipping commences.
Ortlinghaus electromagnetic clutches and brakes come in many design variations for use in many different applications. The electromagnet with its built-in coil is an actuation unit that is totally free of wear. The operating voltage, normally 24V DC, can usually be made available and introduced into the clutch or brake without any problem. The engagement, or disengagement, can be adjusted and controlled electrically. Uses include:
Thanks to the large force available for actuation and the use of the steel/sinter combination, which has very low wear characteristics, hydraulically actuated Ortlinghaus multi-plate clutches, brakes and clutch/brake combined units are suitable for a range of applications in mechanical engineering, motor vehicles and transmission systems.
The cooling oil, which is led through the plates in a precise manner, allows the heat, which varies depending on the particular application, to be dissipated efficiently. To a very large extent these clutches and brakes are wear free and require no maintenance.
All types of Ortlinghaus clutches and brakes are offered with pneumatic actuation. Compressed air represents a secondary source of power that is clean and easy to handle. In many production shops a powerful compressed air network is already present, compressed air is 'clean' and there is no danger of fire in the case of leaks. It is simple to transport and to control and permits rapid and precise operating times even at high operating frequencies. Furthermore the amount of maintenance required for both the compressed air supply system and for the pneumatic clutches and brakes is small.
With torque ratings ranging from 20 Nm to over 100,000 Nm the pneumatic range of clutches and brakes are widely used in all fields of mechanical engineering. Operating pressure of 5.5 bar is required to a maximum of 6.0 bar.
These highly resilient shaft couplings consist of the 'Giubo coupling ring', a resilient element made of natural rubber, and two steel flanges between which the resilient ring is clamped. Depending on the size of coupling, four, six or eight spacer sleeves, which take the connecting bolts, are vulcanised into the fixing points of the coupling ring. The couplings which are resilient in the direction of rotation, can run at an angle and will allow both axial and radial displacement. They are thus the ideal connecting element for all drives which are running uneven, prone to shock loading, and in which damaging peak torques or rotary vibrations have to be smoothed out; the choice of various 'Shore hardness grades' for the 'Giubo ring' allows for different damping characteristics.
In normal cases the high resilience coupling ring consists of natural rubber with a hardness of 65 Shore A; this operates reliably in the range between -25C and 70C. As well as its widespread use as a flexible element in drive trains, it can be used as a resilient cardan shaft and can also be used in conjunction with dry-running clutches.
Ortlinghaus has been manufacturing single and multi-channel rotary inlets for several decades and these are frequently supplied as accessories for air and oil actuated and also for oil cooled clutches. These tried and tested machine components for the feeding of air, pressurised oil and cooling oil into rotating shafts are standard products and are not only for use in conjunction with clutches.