Bently Nevada 24765-02-00 Case Expansion Transducer Assembly

The Bently Nevada 24765-02-00 casing expansion sensor assembly is a precision device used to measure the thermal expansion of large turbine casings and is an important part of turbine monitoring instrumentation (TSI). The following is a detailed introduction:

Working principle: Based on linear variable differential transformer (LVDT) technology. The connecting rod of the LVDT is connected to the machine. When the casing expands, the connecting rod moves inside the LVDT, causing the LVDT signal to change. The signal is conditioned and transmitted to the monitor for display and alarm.

Structural composition: It consists of an LVDT and a weatherproof protective housing to protect the internal components in harsh environments.

Technical parameters

Electrical parameters: Scale factor is 0.404V/mm (10.25V/in), -3dB frequency is 15Hz, linearity is ±0.5% full scale, and stability is 0.125% full scale.

Environmental parameters: operating temperature is -18°C to +71°C (0°F to +160°F), storage temperature is -54°C to +93°C (-65°F to +200°F).

Mechanical parameters: height is 88.9mm (3.50in), width is 117mm (4.60in), length is 241mm (9.50in), weight is 2.3kg (5.0lbs), thread is 10-32 UNC-2B core end, 10-32 UNC-2A machine end.

Application scenario: usually installed on the foundation opposite to the fixed end of the turbine casing, providing information about the expansion of the casing relative to the foundation, helping users determine whether the thermal expansion value of the machine exceeds expectations, and whether the thermal growth rate of the casing and rotor is similar during startup to prevent friction between rotating and stationary parts.

Installation and Use: Casing expansion is generally measured using dual sensors in parallel. The dual casing expansion sensor system can be used with a 3300 or 3500 monitor to provide alarm information for casing measurements.