Limitadores Of pair for banks of essay

Like referent of this market all over the world, Mayr transmission of power carries decades offering the widest range of products with maintenance and decouple of the load, limitation of pair and strength, resbalamiento by friction, mechanical union, by magnetic field, as well as a variety of limiters of pair embragables and controllable. But in spite of having an extensive selection of products, the company receives constantly requests of different sectors that sue new limiters of pair, optimised for said applications, since the available standard series in the market do not satisfy of optimum way the new requests.

The technology of the banks of essay is between these fields of application. Here, it is fundamental that the limiters of pair adapt to speeds extremely high. Besides, they have to be able to transmit a pair without angular game ensuring the rigidity to the torsion. In case of failures, the protection of the systems of high quality has to remain guaranteeed. When it works to high speeds, the only valid solution is a limitador to free rotation (decouple) without residual pair so that in case of overload, the quantity of movement remain decoupled to diminish of speed freely.

With the series EAS-HSC and EAS-HSE, Mayr transmission of power has developed to measure some new limiters of pair, fulfilling with the demanding demands of the technology used in banks of essay. Both series have been built basing in principles of design tested whose efficiency has been showed during decades.

The basic previous condition for the use of a limitador of pair in applications of high speed is, among others, achieve a good quality of balanced for each one of the components for like this attain an optimum rotation in the transmission, using a combination of components. To measure that increases the speed, the disequilibriums cause centrifuges strengths and considerable vibrations. This originates tension in all the structure of the bank of essay and, in consequence, desestabiliza the dynamics and falsean the results of the proofs realised by the measurement instruments. Therefore, optimise the disequilibrium of the masses was the priority when developing new limiters of high speed.

In comparison with the limiters of available standard pair in the market, the new limiters for banks of essay EAS-HSC and EAS-HSE offer a sinfín of technical provision. At first sight it can appreciate his extremely compact design. Thanks to the density of high performance, reduce the rotary presses masses and achieves a positive effect on the stability of the rotation and the dynamics of the machine.

The limiters of pair incorporate different individual components that do not have to displace when the limiters are mounted and neither in case of overloads. This guarantees through determinate characteristics of design. Likewise, in state mounted, the limitador has a quality of balanced dynamic of G2,5, being the speed of reference of 3.000 rpm.

With the end to guarantee that a limitador of pair already installed, tarado according to the corresponding pair and balanced follow keeping his degree of balanced after integrating it in the system of the customer, have minimised the unions between the axis of the customer and the hole of the limitador. The holes mechanised of the limitador have been designed with standard tolerance with quality 6. Besides, the connection of axis-cube of tighten by friction guarantees a transmission of pair without angular game.

The strengths of external reaction that influence on the brida of exit of the limiters of high speed are absorbed by the cojinete of high quality, by what delete the influences on the mechanism of decoupling. The exact limitation of pair remains intact. In case to block the transmission, the limitador of pair decouples to the instant. In the EAS of high speed, the acceleration of the side of entrance at the side of exit is extremely fast. The cojinete of the limitador of high quality of the limitador has been designed to absorb these accelerations.

In case of overload, does not have to change the position of each one of the components between himself. And in case to decouple the limitador, the entrance turns respecto the exit or vice versa. After the reacople has to guarantee go back to establish the initial position, this achieves with the new limiters for banks of essay that decouple and reacoplan of form synchronised.

In the EAS-HSC, in normal operation the pair transfers by means of the balls that join up simultaneously in the slots of the cube and in the brida of exit. The docks Belleville tighten previously the balls through the brida of push. The strength of dock is proportional to the one of the pair transmisible. Neither it appears angular game in case that they wear out the slots, since Mayr transmission of power includes in his limiters of pair, docks Belleville with downward characteristic curve. This means that the pair transmits ensuring the rigidity to the torsion until it reaches the value of decoupling preajustado. In case of overload, reduces the strength of pretensado of the dock and the limitador decouples with precision.

Once decoupled the limitador, a special mechanism commissions to keep it in this state. The transmission can diminish freely. During the times of stop do not produce impacts by reacoples that could have a negative effect on the transmission and, in particular, on the device of measurement of pair. The unit of transmission of pair has been designed so that only it was possible reacoplarla being in the position of decoupling. This means that, during the operation, all the components of the limitador have always the same angular position between yes, guaranteeing the quality of the balanced. The special mechanism of decoupling allows a reacoplamiento easy and fast, without need of big efforts.

In the EAS-HSE, each element of overloads transmits the pair through the positive closing. In case of overload, these elements decouple and separate the entrance and the exit, deleting practically the residual pair and offering precision in the disconnection and good repetibilidad. The kinetical power of the rotary presses masses accumulated in the system can diminish freely. The elements no reacoplan automatically, that is to say, remain separated until they are joined up manually or by means of a device. The position to keep the quality of the balance during the reacople synchronised is marked in the limitador.

The new limiters for banks of essay are provistos of brida of exit so that the customer can incorporate different elements or with attachments with 1 or 2 packages of plates, rigid to the torsion. In addition to the classical connection of 2 axles, Mayr transmission of power offers bridas adaptadoras for the direct integration of bridas of standard measurement. This allows some extremely compact designs.

The series EAS-HSC is available in 5 different sizes and covers a range of pairs between 5 and 1.000 Nm. Depending of the size allow speeds between 6.000 and 12.000 rpm.

Thanks to his characteristics, the new limiters of pair EAS-HSC and EAS-HSE are ideal no only for banks of essay but also for all the other axles of transmission of high speed.