Power station generating set oil groove signal extension apparatus

Abstract

The invention relates to a power station generating set oil groove signal extension apparatus which comprises a pedestal and a panel. The pedestal and the panel are in sealed connection to form internal space. A central section of the pedestal extends a conduit which communicates with the internal space. An end of the conduit is in threaded connection with a first cable jacket. The panel is provided with a plurality of second cable jackets. A plurality of signal cables fixed by the first cable jacket go through the conduit and the internal space, and go out from the second cable jackets. The signal lead out apparatus of the present invention has the advantages of novel design, vibration proof, impact resistance, high grade of sealing pressure, high reliability, reduction of interference to an oil groove sensor signal by electromagnetic field, reduction of site construction difficulty, improvement of site construction efficiency and cost saving. Thereby, the signal extension apparatus of the present invention is especially suitable for extension of a power station generating set large bearing oil groove sensor signal.

Description

technical field [0001] The invention relates to a signal lead-out device, more specifically, to a special device for lead-out of sensor signals in oil tanks of bearings of power station generating sets. Background technique [0002] The major bearing oil tanks of power station generator sets, such as thrust bearing oil tanks, guide bearing oil tanks, etc., are all in a closed environment. Various sensors in the oil tank, such as temperature sensors for measuring thrust bearings and guide bearings, and vibration ferry sensors for measuring the vibration of the main shaft of the generator, etc., all need to extract the parameter signals of the unit's state operation from the closed environment of the oil tank. These signals are partly used for unit protection, and the accuracy and stability of these signals are related to the safety, stable operation and life of the unit. [0003] The oil tank signal lead-out device of the generator set in the power station must meet the foll...

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Problems solved by technology

[0006] (3) The device is installed on the oil tank wall of the unit. Generally, the pressure inside the oil tank is less than 5KG, so the device must withstand pressure, and the long-term sealing problem must be solved when the sensor signal is drawn out from the device

[0010] The disadvantage of using this kind of multi-pin quick connector is: the unit is running at high speed, and the speed of some units reaches 750 revolutions per minute. Driven by the main shaft of the unit, the oil flow has a great impact on the sensor signal cable arranged in the oil tank. The 55-pin quick connector is fixed by four M3 screws, and its fixing force cannot meet the impact of the vibration of the unit and the high-speed oil flow of the unit on the connection between the signal cable and the connector; four M3 screws are used to compress the sealing gasket. , due to the small pressing force, there will be oil leakage during the long-term operation of the unit; the multi-pin quick connector adopts tin soldering for internal and external welding of sensor signal cables, and more than 50 wires need to be welded within 36mm, which is difficult for on-site storage and construction , and when the vibration of the unit is large, it is easy to cause signal jumps, directly causing the unit to trip, and having a relatively large impact on the power grid; using a multi-pin quick connector, the shielding of the signal cable is disconnected, and electromagnetic interference will affect signal transmission

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