Temperature rise measurement method for submersible motor
A technology of submersible motor and measurement method, which is applied in the direction of measuring device, heat measurement, thermometer, etc., can solve the problems of no method for quantitative measurement, complicated process, and lack of universality, so as to improve design reliability and reduce difficulty and complexity Sexuality and the effect of prolonging the service life
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Embodiment 1
[0015] Embodiment 1: a kind of 456 series 54.4kW submersible motor temperature rise measuring method is characterized in that it is made of following steps:
[0016] (1) Measure the output displacement Q of the submersible electric pump to be 350m 3 / d. The outer diameter d of the submersible motor is 116mm and the inner diameter D of the casing is 225mm;
[0017] (2) Use the three measured values in step (1) to pass the formula v=14.737×Q / (D 2 -d 2 ) Calculate the surface flow velocity v of the submersible motor to be 0.1388m / s, and the loss correction coefficient β is obtained by the formula β=1-0.3333v to be 0.9537;
[0018] (3) Measure the surface area S of the submersible motor to be 2.094m 2 , The total loss P of the submersible motor is 16.9266kW, and the surface area correction coefficient α is 0.4018 at the standard flow rate of 0.2m / s;
[0019] (4) Calculate the temperature change θ of the submersible motor by the formula θ=(P×β) / (S×α), which is 19.186°C.
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Embodiment 2
[0021] Embodiment 2: a kind of 540 series 62.1kW submersible motor temperature rise measuring method is characterized in that it is made of the following steps:
[0022] (1) Measure the output displacement Q of the submersible electric pump to be 324m 3 / d. The outer diameter d of the submersible motor is 137.16mm and the inner diameter D of the casing is 225mm;
[0023] (2) Use the three measured values in step (1) to pass the formula v=14.737×Q / (D 2 -d 2 ) Calculate the surface flow velocity v of the submersible motor to be 0.1501m / s, and the loss correction coefficient β is obtained by the formula β=1-0.3333v to be 0.94997;
[0024] (3) Measure the surface area S of the submersible motor as 2m 2 , The total loss P of the submersible motor is 13.043kW, and the surface area correction coefficient α is 0.34 at the standard flow rate of 0.2m / s;
[0025] (4) Calculate the temperature change θ of the submersible motor by the formula θ=(P×β) / (S×α), which is 18.2213°C.
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