Electrohydraulic control method and device for axial flow propeller turbine runner tests

Abstract

The invention provides electrohydraulic control method and device for axial flow propeller turbine runner tests. The control device comprises a flow pump, a pressure testing pump, an oil circuit and an oil pressure controlling mechanism, wherein the flow pump and the pressure testing pump are connected with a to-be-tested axial flow propeller turbine runner via the oil circuit; the oil pressure controlling mechanism comprises an electrohydraulic reversing component; the electrohydraulic reversing component comprises an electrohydraulic reversing valve for control, an electrohydraulic reversing valve for business and an energy accumulator; the electrohydraulic reversing valve for control and the electrohydraulic reversing valve for business are connected to increase the driving force of the oil circuit; the oil circuit from the electrohydraulic reversing valve for business to a turbine runner comprises a positive swing oil circuit and a negative swing oil circuit; an output end of the electrohydraulic reversing valve for business is provided with a positive swing switch group and a negative swing switch group which have mutually-exclusive trigger states; and both the positive swing switch group and the negative swing switch group have two operating modes of hydraulic trigger and manual trigger. By means of the method and the device which are provided by the invention, the axial flow propeller turbine runner can be safely and conveniently tested.

Description

technical field [0001] The invention relates to the technical field of power generation equipment, in particular to an electro-hydraulic control method and device for a runner test of an axial flow paddle water turbine. Background technique [0002] Axial-flow paddle turbine generating units of large hydropower stations need to carry out regular A-level maintenance of the units. Due to the complex structure of the runner of the axial-flow paddle turbine and the high requirements for the installation of the internal operating mechanism, the disassembly and maintenance of the runner has always been the key item of unit A maintenance. In order to check the installation quality, according to the requirements of relevant national standards, after the overall installation of the runner, the test of the runner operating mechanism must be carried out. The test mainly includes the operation test of the vane and the pressure test of the piston cylinder. [0003] The blade operation ...

AI Technical Summary

Problems solved by technology

Once the pressure suddenly rises, it will cause the seal of each part of the runner to exceed the test pressure, directly threatening the sealing performance of the seal

If the seal is damaged, the runner will be repaired, and the repair cost is very high; in addition, due to the increase in pressure, the system pipe joint will also collapse. During the test in the past, the joint collapse often occurred.

After fuel injection, the pipeline needs to be reconnected, and more than 10 people are required to clean up the oil stains on site

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