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

Inactive Publication Date: 2012-09-12
李健忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, the measurement of temperature rise in the design of submersible electric pumps is only a qualitative estimate, and there is no method for quantitative measurement
Secondly, if you need to obtain the temperature change data of the submersible motor, you can only use professional measuring equipment in a professional test well and measure it under the condition of dragging the rated load, but this result can only represent the measured motor. The temperature change value under this specific load is not universal, and the process is very complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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.

[0...

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.

[00...

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Abstract

A temperature rise measurement method for a submersible motor is characterized by including steps: measuring the output discharge capacity Q of a submersible electric pump, the outer diameter d of the submersible motor and the inner diameter D of a sleeve; calculating according to the three measured values and a formula v=14.737XQ / (D2-d2) to obtain the surface flow velocity v of the submersible motor, and obtaining a loss correction factor beta according to a formula beta=1-0.3333v; measuring the surface area S of the submersible motor, the total loss P of the submersible motor and a surface area correction factor alpha at a standard flow velocity of 0.2m / s; and calculating the temperature variation theta of the submersible motor according to a formula theta=(PXbeta) / (SXalpha). Temperature rise variation of the electric pump under actual operating conditions can be indirectly quantized and obtained by means of measurement of the method instead of measurement of actual operating condition tests. By the temperature rise measurement method, difficulty and complexity in temperature rise measurement of the submersible motor are lowered, reliability in design of the submersible electric pump is improved, and the service life of a submersible electric pump unit under actual well conditions can be prolonged.

Description

(1) Technical field: [0001] The invention relates to a method suitable for measuring the temperature rise of a submersible motor. (2) Background technology: [0002] At present, in the design of electric submersible pumps, there is no mathematical model that can directly measure the value of the temperature change of the electric submersible motor when the electric pump is working under working conditions. However, the change of temperature is a crucial factor for the life and reliability of submersible motors. For this reason, the measurement of temperature rise in the design of submersible electric pumps is only a qualitative estimate, but there is no method for quantitative measurement. Secondly, if you need to obtain the temperature change data of the submersible motor, you can only use professional measuring equipment in a professional test well and measure it under the condition of dragging the rated load, but this result can only represent the measured motor. The te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K13/00
Inventor 李健忠
Owner 李健忠
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