Bently Nevada 24765-02-01

Product Features

Bently Nevada 24765-02-01 core function is to monitor the amount of thermal expansion of the turbine casing due to temperature changes during startup and operation, which includes:

Measuring the displacement of the thermal expansion of the casing relative to the foundation.

Monitoring the position of the sliding foot of the casing by means of a dual sensor configuration to avoid deformation of the casing or damage to the machine due to jamming of a single foot.

Assisting in determining whether the thermal expansion rates of the shell and the rotor are matched to prevent friction between rotating and stationary parts due to expansion differences.

Bently Nevada 24765-02-01 is based on the Linear Variable Differential Transformer (LVDT) principle and is equipped with a waterproof protective housing for industrial turbine condition monitoring scenarios.

Product Functions

1.Bently Nevada 24765-02-01 is based on LVDT technology, which converts the mechanical displacement of a rod into an electrical signal for highly accurate measurement of thermal expansion of the housing.

2.The housing is made of 400 series magnetic stainless steel, NEMA 3 (dust and splash proof), the coil is made of laminated glass epoxy resin for environmental stability, and the leads are 25 AWG multi-stranded copper wires, Teflon insulated, and 31 cm (12 in) in length to accommodate industrial wiring requirements.

3.High linearity (±0.5% of full scale) ensures measurement accuracy; strong stability (0.125% of full scale) with low drift for long term use; Bently Nevada 24765-02-01 is temperature compensated with low temperature coefficient of proportionality factor (0.07%/°C) to adapt to a wide range of temperature working environment.

4.Bently Nevada 24765-02-01 supports dual sensor configuration, can be linked with the monitor, the shell sliding foot jamming and other abnormal state trigger alarm.

Product Applications

Bently Nevada 24765-02-01 is mainly applied to the condition monitoring of large-scale turbines (e.g. steam turbine, gas turbine), and the specific scenarios include:

Turbine start-up phase: monitoring whether the thermal expansion rates of the casing and rotor are matched to avoid friction of components.

Operation phase: real-time monitoring of the thermal expansion of the casing to ensure that the equipment operates within safe limits.

Failure warning: monitoring the status of the sliding foot through a dual sensor configuration to prevent deformation of the casing or damage to the machine due to jamming.

Product Parameter

Input Power +24 Vdc, 30 mA minimum

Scale Factor 0.404 V/mm (10.25 V/in)

Linear Range ±25.4 mm (±1.00 in) -3 dB Frequency 15 Hz

Output Impedance 7 kΩ nominal (all models)

Minimum Load Resistance 100 kΩ

Output Ripple < 1% full scale

Linearity ± 0.5% full-range

Stability 0.125% full-scale

Scale Factor Temperature Coefficient 0.07%/°C (0.04%/°F)

Operating Temperature -18 °C to +71 °C (0 °F to +160 °F)

Storage Temperature -54 °C to +93 °C (-65 °F to +200 °F)

Shock Resistance 250 g for 11 ms

Vibration Resistance 10 g @ 0 to 2 kHz