Transformer oil pump sealing test device and test method

Abstract

The invention discloses a transformer oil pump sealing test device and a test method, which can perform a sealing test on an oil pump at a specified temperature and pressure and have a good test effect. The test device comprises an oil tank, a power pump, a heating tank, an oil supplementing tank, an oil injection pipeline and an oil outlet pipeline, an inlet of the power pump is respectively communicated with an oil outlet of the oil tank, an oil outlet of the heating tank and the oil inlet pipeline through connecting pipelines, and is respectively communicated with an oil inlet of the oil tank and the oil inlet pipeline through connecting pipelines; the oil outlet pipeline is respectively communicated with the oil inlet of the heating tank and the oil supplementing tank; the oil supplementing tank is connected with a pressurizing pipeline; an electric valve is arranged on the pressurizing pipeline; the oil injection pipeline, the oil outlet pipeline, the oil inlet and the oil outlet of the oil tank and the oil outlet of the heating tank are respectively provided with an electric valve; an electric valve is respectively arranged between the oil injection pipeline and the inlet and the outlet of the power pump, and an electric valve is arranged between the oil outlet pipeline and the oil supplementing tank; and the power pump, the heating tank and all the electric valves are electrically connected with the control system.

Description

technical field [0001] The invention relates to the technical field of transformer oil pumps, in particular to a transformer oil pump sealing test device and a test method. Background technique [0002] The transformer oil pump is a very important power source in the cooling system of the electric locomotive traction transformer. It is responsible for pumping out the hot oil inside the transformer and cooling it through the cooler before pumping it into the transformer to cool the transformer windings. Because the transformer oil pump is installed near the transformer, its tightness must be ensured. Once the oil leaks, it may cause a major safety accident. The "TJ / JW021-2014 Electric Locomotive Traction Transformer Oil Pump" standard stipulates that when the oil pump leakage test is carried out: the oil pump is filled with transformer oil, and a pressure of 0.5 MPa is applied. The initial temperature of the oil pressure medium is 75 ° C ~ 85 ° C. Placed in a low temperature...

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Problems solved by technology

During the type test, an oven is used to heat the oil pump, fill the transformer oil with external pressure, and then heat it up to 95°C; when using this method, on the one hand, the pressure will increase with the increase of temperature, which is not easy to control; on the other hand On the one hand, the transformer oil will heat up and expand as the temperature rises, so the transformer oil in the oil pump cannot be filled up during the test, resulting in some oil pumps not being soaked in the transformer oil, so that the tightness of this part of the oil pump is not guaranteed during the leak test Can be tested out, affecting the seal test results of the oil pump

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