Arrangement for closure of slots
View Patent ↗An exemplary slot closure arrangement has a sliding block and a pressure piece. At least one spring element is arranged in between them and can be prestressed by at least one attachment, which interacts with the sliding block and the pressure piece, thus creating a prefabricated assembly. Once the slot closure arrangement has been positioned in a slot, the attachment can be mechanically moved from a first position to a second position, which can be monitored, after positioning of the slot closure arrangement, for activation of the spring forces of the at least one spring element.
1. A slot closure arrangement, comprising:
a sliding block which extends in a direction of a longitudinal axis;
a pressure piece which extends in the direction of the longitudinal axis;
at least one spring element which extends in the direction of the longitudinal axis, wherein the spring element with the pressure piece forms a bending-beam arrangement in a direction of a lateral axis which extends transversely with respect to the longitudinal axis, such that the spring element can be bent by the pressure piece in a direction of a vertical axis which is arranged transversely with respect to the longitudinal axis and with respect to the lateral axis; and
an attachment means for prestressing the spring element before insertion of the slot closure arrangement into a slot in an electrical machine, wherein the at least one spring element includes multiple electrically insulating fibers which are aligned unidirectionally in the direction of the lateral axis and are connected to one another by a resin, and the attachment means is configured for mechanical movement from a first position to a second position, which can be monitored after positioning of the slot closure arrangement in the slot, such that prestressing of the spring element can be released.
2. The slot closure arrangement as claimed in claim 1 , wherein the attachment means is configured for removal from the slot closure arrangement on reaching the second position, or for visual identification at the second position.
3. The slot closure arrangement as claimed in claim 1 , wherein the attachment means is arranged at an end of the slot closure arrangement in the direction of the longitudinal axis.
4. The slot closure arrangement as claimed in claim 1 , wherein the attachment means is arranged approximately longitudinally centrally on the slot closure arrangement in the direction of the longitudinal axis.
5. The slot closure arrangement as claimed in claim 1 , wherein the attachment means comprises:
at least one screw associated with the pressure piece for moving the sliding block in the direction of the vertical axis.
6. The slot closure arrangement as claimed in claim 1 , wherein the attachment means comprises:
at least one holding element configured as one of a bracket, a rivet, an expanding mandrel, or a bayonet fitting.
7. The slot closure arrangement as claimed in claim 1 , wherein the pressure piece, the sliding block and the spring element are configured such that at least one wedge/opposing-wedge combination is formed in the direction of the longitudinal axis.
8. The slot closure arrangement as claimed in claim 1 , wherein the resin is a heat-resistant resin.
9. The slot closure arrangement as claimed in claim 1 , wherein the pressure piece and the at least one spring element are integrally combined.
10. The slot arrangement of claim 1 , wherein the spring element is a leaf spring.