Generator low-frequency vibration sensor TVS-201H waterproof type

Generator low-frequency vibration sensor TVS-201H waterproof type

Generator low-frequency vibration sensor TVS-201H waterproof type

The TVS-201 vibration sensor is a new type of sensor developed and produced by our company. It has strong versatility and can be installed vertically or horizontally. It also has high waterproof performance (up to IP67 protection level), avoiding the previous classification of low-frequency vibration sensors into vertical, horizontal, waterproof and other types, making it convenient for users to select and reduce maintenance spare parts.

The TVS-201 low-frequency vibration sensor is a seismic vibration velocity sensor that uses a low-frequency extension correction circuit to reduce the natural frequency of its output characteristics to 1/20 to 1/40 of the original, which can reach 0.5Hz or lower. The DPS low-frequency vibration sensor not only maintains anti vibration, impact resistance, and high stability, but also has good low-frequency output characteristics. Moreover, it has an integral link inside, which can directly output vibration displacement signals, that is, amplitude signals.

The TVS low-frequency vibration sensor is a new type of sensor developed and produced by our company. It has strong versatility and can be installed vertically or horizontally. It also has high waterproof performance (up to IP67 protection level), avoiding the previous classification of low-frequency vibration sensors into vertical, horizontal, waterproof and other types, making it convenient for users to select and reduce maintenance spare parts. Low frequency vibration sensor is a seismic vibration velocity sensor with a high natural frequency of mechanical structure, which is passed through a set of low-frequency extension correction circuits to reduce the natural frequency of its output characteristics to 1/20 to 1/40 of the original, and can reach 0.5Hz or lower. Low frequency vibration sensors not only maintain anti vibration, impact resistance, and high stability, but also have good low-frequency output characteristics. Moreover, they have an integral element inside, which can directly output vibration displacement signals, namely amplitude signals.

TVS-201 low-frequency vibration sensor is suitable for vibration monitoring of large hydro generator units and low-speed rotating machinery, machine tool accuracy testing, earthquake monitoring and geological exploration, vibration analysis of high-rise buildings and structures, dynamic deformation and vibration testing of roadbeds and bridges, and can be used in security and other fields.

Main technical indicators:

Working power supply: 1. Single power supply:+12V~+24VDC; -Powered by 12V~-24Vdc, the output will add a DC bias of 0.5 times the power supply voltage value

2. Dual power supply: ± 6V to ± 15V power supply, output voltage is related to operating voltage

3. Working current ≤ 15mA

Frequency response range: 0.5Hz~250Hz (-3dB)

Damping ratio: 0.65 ± 0.05

Sensitivity: Displacement output type 8V/mm ± 5% (adjustable according to user requirements); Speed output type 20mV/mm/s ± 5%

Mechanical amplitude displacement ± 3mm

Nonlinear amplitude: ≤ 5%

Horizontal cross impact:<5%

Environmental temperature range: -20 ℃ to+80 ℃

Protective features: dustproof, waterproof

Protection level: IP67 (direct cable output can withstand immersion up to 1 meter deep)

Dimensions: Φ 66 × 140mm

Weight (excluding cables) approximately 420g

The low-end of the frequency response range is the nominal natural frequency value, at which the sensitivity attenuates to the nominal value of 0.707 (-3dB). The cutoff frequency also refers to the -3dB point. The frequency response range and sensitivity of the sensor can be changed according to user requirements. The measurement range of sensor vibration displacement is limited by the amplitude of the output voltage and the mechanical position of the oscillator. If the sensitivity is high, the corresponding measurement range is small, and if the sensitivity is low, the measurement range can be increased. The product of the two is equal to the output voltage. For example, when the sensor is powered by ± 12V, the output voltage is ± 10V. If the sensitivity is 8V/mm, the measurement range is ± 1.25mm. If the sensitivity is 4V/mm, the measurement range is ± 2.5mm.

Install separately on the water turbine unit, cylinder valve relay, and recovery mechanismMLK-1Displacement sensor, domestic position switch. The characteristics of this displacement sensor: The guide vane relay displacement sensor uses a non-contact magnetostrictive displacement transmitter. Due to the non-contact between the moving magnet and the sensor, no wear occurs, which is conducive to long-term use; High precision and protection level; Easy to install; The measurement value can be adjusted within a certain range; Measurement signals are used for monitoring and unit speed control devices; Different action points can be set according to the needs of control, and the on/off electrical signals are provided to the monitoring system. On domestic and foreign units. More transmitters that use this principle. Domestic position switches are difficult to adjust. Due to factors such as large size, some power stations have been replaced by non-contact linear position switches.

The generator shaft current monitoring device is composed ofXilan HengyuanThe company produces and provides a shaft current monitoring device consisting of a shaft current transformer and a shaft current display alarm device. The shaft current transformer is mounted on the main shaft of the generator and fixed in the center of the lower frame below the oil blocking pipe in the thrust oil groove of the generator. When the insulation of the generator bearing is damaged and a harmful shaft current is formed in the main shaft, the shaft current display instrument can display the magnitude of the shaft current. Send an alarm or shutdown signal. Thus, faults can be detected and eliminated before bearing damage occurs, avoiding the escalation of accidents.

All electro-hydraulic directional valves of the unit are equipped withXilan HengyuanDFXThe product features a two position four-way electro-hydraulic directional valve with double coils, self-locking, and the ability to be powered on for a short period of time. It controls the locking of the unit and the two-stage shut-off valve. Provide a two-stage shut-off valve installed on the return oil pipeline when the relay is closed. During the emergency shutdown process of the unit, when the unit is closed to a certain opening at a certain speed, operate the solenoid valve and activate the two-stage closing valve to change the closing speed of the unit, prevent the unit from lifting, and protect the safety of the unit.

Each unit is equipped with a unit brake cabinet, temperature instrument cabinet, hydraulic measurement cabinet, and cylinder valve control cabinet4 of them. The unit brake cabinet can automatically and manually complete the mechanical braking of the unit and the reverse inflation of the brake. Install 18 units on the temperature instrument cabinetXACLAKEproductionTDS5326-02-09-HLL-T power station specific temperature instrument, which is anti-interference and has stable performance. It has dual upper limits and 4-20mA output. This instrument can effectively prevent switch misoperation caused by Pt100 platinum resistor disconnection and short circuit, resulting in unit shutdown.