2026-09-03

Cómo resolver el problema de ruido generado por la granalladora

Se emplean tres métodos clave para reducir el ruido en los equipos de granallado: optimizar el diseño del equipo, ajustar los procesos tecnológicos e implementar medidas de aislamiento acústico.

Gestión de la fuente sonora

  • Mejoras en el sistema de impulsor: El uso del equilibrado dinámico de precisión (por ejemplo, elevar la clase de equilibrio dinámico de G6,3 a G2,5) puede reducir el ruido generado por vibraciones entre 15 y 20 dB. Sustituir el distribuidor de granalla estándar por uno de poliuretano absorbe aún más las vibraciones por impacto.

  • Mejora de la trayectoria de la granalla: Instalar revestimiento de caucho (de 12 mm de espesor o superior) en el interior de la cámara de granallado. El revestimiento de caucho resistente al desgaste corrugado absorbe un 30 % más de energía de impacto que el revestimiento plano.

  • Mejora del sistema de amortiguación de vibraciones del motor: Emplear un motor síncrono de imanes permanentes en lugar de un motor de inducción tradicional, combinado con soportes elásticos y amortiguadores hidráulicos, permite reducir el ruido electromagnético en un 18 %.

Bloqueo de las vías de transmisión del ruido

  • Carcasa modular de aislamiento acústico: Diseño de panel de acero doble (1,5 mm + 2 mm) con núcleo de lana mineral de 50 mm, combinado con juntas de sellado tipo laberinto, reduce la transmisión del ruido aéreo en más de 25 dB.

  • Uso de silenciador: Se instala un silenciador compuesto de impedancia (con placa microperforada y carcasa de acero inoxidable) en la salida del sistema de extracción de polvo, que ofrece una pérdida por inserción de hasta 30 dB.

Optimización de los parámetros del procesoAjuste de la mezcla de abrasivos: una mezcla 7:3 entre granalla de acero y granalla angular de acero reduce el nivel de ruido en 8 dB en comparación con el uso exclusivo de granalla de acero. El tamaño de partícula se controla en el rango de 0,8–1,2 mm para minimizar la turbulencia del aire.

Control del ángulo de impacto: se utiliza la modelización mediante Dinámica de Fluidos Computacional (CFD) para reducir el ruido reflejado por la pieza. Inspeccionar periódicamente las paletas, impulsores y otros componentes de alto desgaste para detectar signos de desgaste, y sustituir las piezas dañadas de inmediato para evitar ruidos anómalos y degradación del rendimiento.



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