Lamella

This article covers the technical part. For the structure of the mushrooms, see lamella (mycology) . For the warp thread monitor see lamella (weaving mill) .

Parallel slats of a blind

Radial flaps of a flap disc

Parallel and radial lamellae of the kouxian (Chinese musical instrument)

A lamella (from late Latin lamella "thin disc [made of metal]") is a plate or a thin layer that is usually located in a structure of similarly arranged, often parallel or radial lamellae.

General

In technology, lamellae serve to influence the strength in a direction-dependent manner and / or to form or enlarge interfaces . Lamella structures make it possible to save space and weight.

Their functions are power transmission , the dissipation of heat , light refraction or opacity , influencing flows , electrical conduction or acting as an adsorption or filter medium . Depending on their arrangement or mobility, slats can be elements of a variable surface.

Architecture and construction

In the case of lattice shells as a roof structure, a network of lamellas is suitable as a supporting structure for a flexible or transparent roof skin . Slat facades act as sun and / or weather protection, for heat regulation and / or as a decorative element. Movable glass slats on a facade can regulate the rear ventilation .

Venetian blinds or lamellar curtains regulate the incidence of light with movable slats and / or serve as privacy screens. Ventilation grille louvers influence the currents caused by ventilation .

Mechanical and electrical engineering

Lamellar turbines improve the power transmission between a flowing liquid and a generator . The lamellas in a lamellar motor are used for power transmission and, thanks to their variable surface, enable an eccentric arrangement of the shaft. Friction plates in a multi-plate clutch convert kinetic energy into heat. Radiator fins and heat sinks dissipate heat to the surrounding air.

The lamellar spring is a flat leaf spring . Tongue lamellae (" penetrating tongue ") are used in musical instruments such as the lamellophone to generate and transmit a vibration to the surrounding air. In the weaving mill , the warp thread monitors are called “lamellas”: They are buttons that establish electrical contact when a warp thread breaks.

In electrical engineering, lamellas made of electrical sheet metal in transformers and similar components limit the magnetic eddy currents .

Individual evidence

1. ^ Roche Lexicon Medicine . 5th edition. Urban & Fischer, Munich 2003, ISBN 3-437-15156-8 , p. 1069.
2. ^ Hans-Jürgen Grabbe: Builders Lexicon . Vieweg, Braunschweig 1976, ISBN 978-3-528-08657-2 , p. 148.