Sound insulation and noise reduction design for hotel elevators: shaft sound insulation and machine room vibration damping

Sound insulation and noise reduction design for hotel elevators: shaft sound insulation and machine room vibration damping

I am Ethan Liu, an elevator specialist focusing on elevator system design and special equipment management. The hotel elevator sound insulation and noise reduction design you mentioned is crucial in high-end hotel projects—it directly affects guest room comfort, brand reputation, and operational quality, and may even become a key deduction item during owner acceptance. Based on my years of engineering experience, hoistway sound insulation and machine room vibration isolation are the two core aspects, and the relevant requirements of GB 7588-2003 "Safety Rules for the Construction and Installation of Electric Lifts" and GB/T 10060-2011 "Code for Acceptance of Lift Installation" must be strictly followed, with optimization combined with actual working conditions.

1. Hoistway Sound Insulation Design

• Selection of sound insulation materials: Apply 50 mm thick rock wool or glass wool (density ≥100 kg/m³) to the inner wall of the hoistway, and fix it with perforated gypsum board or metal panels. For example, in a five-star hotel project where the hoistway was adjacent to guest rooms, we adopted a composite structure of double-layer steel plates + 100 mm rock wool, achieving a sound insulation rating of Rw+45 dB, which complies with the guest room sound insulation standard in GB 50118-2010 "Code for Sound Insulation Design of Civil Buildings."
• Gap sealing: At the connections between the hoistway and floor slabs and walls, elastic sealant must be used to fill gaps and avoid sound bridges. With reference to Clause 5.4.3 of GB 7588, there should be no permanent openings in hoistway walls, and all inspection doors and landing doors should be tightly sealed (e.g., using magnetic strips or rubber strips).
• Actual case: In a coastal resort hotel, the hoistway passed through the guest room area, and sound insulation was not considered in the initial design, resulting in complaints from lower-floor guest rooms. We subsequently installed 50 mm thick sound insulation felt inside the hoistway and replaced the elastic landing door sealing strips, reducing noise from 45 dB to below 30 dB, meeting the requirement of nighttime guest room noise ≤35 dB.

2. Machine Room Vibration Isolation Design

• Vibration isolation foundation: Install spring vibration isolators (e.g., the German brand GERB) under the traction machine base, with vibration isolation efficiency ≥95%. For example, in a city hotel where the machine room was located directly above guest rooms, we adopted a double-layer vibration isolation platform (concrete platform + spring pads) and installed rubber pads between the guide rail brackets and hoistway walls, reducing the vibration transmission rate to below 5%.
• Vibration isolation materials: Lay 10 mm thick rubber pads or floating floors (e.g., vibration isolation pad density ≥300 kg/m³) on the machine room floor to prevent solid-borne sound. Clause 5.2.6 of GB/T 10060 requires that the vibration acceleration of the machine room floor be ≤0.05 m/s², and we verified compliance through actual measurement.
• Actual case: In a business hotel renovation project, the original elevator machine room noise reached 50 dB (inside guest rooms). We replaced the equipment with a permanent magnet synchronous traction machine (gearless, low vibration) and added spring vibration isolators and a sound insulation door for the machine room. Ultimately, guest room noise was reduced to 28 dB, and the vibration sensation disappeared completely.

Summary