Product category:
Gears, brakes, couplings and engines
News Release from: KTR Couplings | Subject: Torque limiters
Edited by the Engineeringtalk Editorial
Team on 18 December 2006
Torque limiters protect against
explosions
KTR design engineers have transferred their know-how regarding explosion protection to the subject of torque limiters.
KTR offers an extensive range of various designs of shaft couplings certified in accordance with potential gas or dust explosions Apart from the standard programme ,which is extended continuously, individual solutions for drive systems in potentially explosive areas are available
This article was originally published on Engineeringtalk on 19 Sep 2006 at 8.00am (UK)
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Recently the KTR design engineers have transferred their know-how regarding explosion protection to the subject of torque limiters.
As a result the design engineers now dispose of such overload systems which may be used in potentially explosive areas and which are certified in accordance with ATEX.
However, here standardised solutions can only be used to a limited extent, because important drive parameters like speed, torque and maximum ambient temperature have to be registered individually.
In addition, the cooling periods between the different overload cases have to be taken into account to make sure that the maximum permissible surface temperature is not exceeded.
Based on the aforementioned parameters the KTR design engineers select an overload system which is certified for the conditions indicated.
The corresponding documents for testing and certification are deposited with the institution verifying and granting the certification.
Consequently the user is always on the safe side.
In many cases standard solutions from the Ruflex torque limiter programme or the KTR-SI safety clutch programme can be used.
With torque limiters additional measures such as temperature gauges or speed measuring are necessary to ensure the high safety level in potentially explosive areas.
For reason of safety only those safety clutches are used as ratchet couplings which fully separate the drive in case of overload.
The user then has to actively reproduce the torque flow at standstill by mechanical ratcheting of the coupling.
This allows the design engineer of drives or machines for potentially explosive areas to make use of the advantages of mechanical overload systems.
The compact systems are characterised by a quick reaction and a high reliability and make sure that driving and driven side are separated in case of overload.
In this way they assist to avoid bigger damages and add to a long service life of the drive systems and the entire machine.
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