Self-pumped water-turbine generator set bearing oil mist absorption device

Abstract

The invention discloses a self-pumped water-turbine generator set bearing oil mist absorption device which comprises a water-turbine generator large shaft. An impeller is fixedly mounted on the water-turbine generator large shaft and divided into an upper vane area and a lower vane area by an impeller radial rotating surface, an impeller shell wrapping the impeller is arranged outside the impeller, the bottom of the impeller shell is connected with a set bearing oil groove cover of the water-turbine generator large shaft, the impeller shell is provided with an outlet pipeline, the outlet pipeline is connected with an oil mist condenser, an oil liquid recovery tank is arranged behind the oil mist condenser, and an oil-level meter is arranged on the liquid recovery tank. The oil mist absorption device does not need an external device or an external power supply for driving, oil mists can be efficiently absorbed, and the oil mist absorption device is high in absorption efficiency, convenient to maintain, safe and reliable in running and less in consumed energy.

Description

technical field [0001] The invention relates to an oil mist absorbing device for a self-pumped hydroelectric generating unit bearing (including an upper guide bearing, a lower guide or thrust bearing, and a water guide bearing), which can be widely used in vertical hydroelectric generator installation type hydropower stations. The utility model relates to self-pump absorbing oil mist generated during the operation of a bearing of a water turbine generator set, and belongs to the field of auxiliary working devices of the water turbine generator set. Background technique [0002] During the operation of the bearings of hydroelectric generator sets in hydropower stations, due to the increase of bearing temperature, part of the lubricating oil in the bearings will turn into a vapor state and overflow from the gap between the bearing oil tank cover and the large shaft, and a large amount of bearing lubrication will be generated in the surrounding area of ​​the bearings. Oil mist,...

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Problems solved by technology

[0002] During the operation of the bearings of hydroelectric generator sets in hydropower stations, due to the increase of bearing temperature, part of the lubricating oil in the bearings will turn into a vapor state and overflow from the gap between the bearing oil tank cover and the large shaft, and a large amount of bearing lubrication will be generated in the surrounding area of ​​the bearings. Oil mist, in order to prevent the generation of oil mist from polluting the generator equipment and causing generator failure or environmental pollution, a set of external oil mist absorption devices are usually installed for the unit bearings, that is, pipes are installed at the seal of the bearing oil tank cover and arranged on the machine. The oil mist absorbing device outside the pit is connected to absorb the oil mist generated by the bearings. However, the existing oil mist absorbing device system often has unsatisfactory oil mist absorbing effect due to too long pipes or unreasonable oil mist absorption design. Or the stator and rotor are contaminated with a lot of oil; at the same time, some units currently use contact seals to isolate oil mist from overflowing from the bearing oil tank, but contact seals have high requirements for materials and unit installation quality, and require frequent maintenance and replacement, which is expensive. And the effect is also unsatisfactory; the existing oil mist absorption device adopts an external electric absorption device, and is equipped with a set of automatic control device and power supply system. The automatic device participates in the start-up process, and the start-up may not be successful due to the failure of the automatic control system, etc., and It is also inconvenient for maintenance and consumes energy

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