Motor temperature protection control system and method for high-pressure water injection pump

A technology for motor temperature and protection control, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of motor insulation damage, temperature rise, motor burnout, etc. Effect

Pending Publication Date: 2021-06-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a motor temperature protection control system and method for a high-pressure water injection pump, which overcomes the higher temperature of the motor under low-speed operation in the prior art and the high frequency generated by the frequency conversion device. Pulse and harmonics will cause insulation damage and temperature rise of the motor, and in severe cases, it will cause problems such as motor burnout

Method used

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  • Motor temperature protection control system and method for high-pressure water injection pump
  • Motor temperature protection control system and method for high-pressure water injection pump
  • Motor temperature protection control system and method for high-pressure water injection pump

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specific Embodiment approach

[0033] It should be noted that the structures, proportions, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for the understanding and reading of those familiar with this technology, and are not used to limit the conditions for the implementation of the present invention , any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope covered by the technical content disclosed in the present invention without affecting the effect and purpose of the present invention. .

[0034] At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit this specification. The practicable scope of the invention and the change or adjustment of its relative relationship shall also be regarded as the practicable scope of the present invention without...

Embodiment 1

[0036] Such as figure 1 As shown, the present invention discloses a motor temperature protection and control system for a high-pressure water injection pump, including a temperature controller 1, a vector frequency converter 2, an output reactor 3, a contactor 4, a three-phase asynchronous motor 5, a water injection pump 6, a measuring temperature resistance 7 and independent fan 8, the temperature controller 1 is electrically connected to the vector frequency converter 2, the temperature measuring resistance 7 and the independent fan 8, the vector frequency converter 2 is electrically connected to the output reactor 3, and the output reactor 3 is connected to the The contactor 4 is electrically connected to the three-phase asynchronous motor 5, the three-phase asynchronous motor 5 is electrically connected to the water injection pump 6, the temperature measuring resistor 7 is fixed on the three-phase asynchronous motor 5, and the independent fan 8 is set on three phase asynch...

Embodiment 2

[0040] Preferably, the independent fan 8 is not coaxial with the three-phase asynchronous motor 5 and is an independent fan, and the three-phase asynchronous motor 5 has its own coaxial fan.

[0041]Preferably, the coaxial fan 8 carried by the independent fan 8 and the three-phase asynchronous motor 5 is arranged on the same side of the three-phase asynchronous motor 5, wherein the clip between the independent fan 8 and the coaxial fan carried by the three-phase asynchronous motor 5 The angle is less than 10°.

[0042] The shaft of the independent fan 8 is not coaxial with the shaft of the three-phase asynchronous motor 5, so the speed of the independent fan 8 is not changed by the change of the speed of the three-phase asynchronous motor 5, and the power supply of the independent fan 8 is controlled by the temperature controller 1 , can control the start and stop of the independent fan 8 and the speed of the rotating speed.

[0043] The two fans are arranged on the same side...

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Abstract

The invention discloses a motor temperature protection control system and method for a high-pressure water injection pump. The system comprises a temperature controller (1), a vector frequency converter (2), an output reactor (3), a contactor (4), a three-phase asynchronous motor (5), a water injection pump (6), a temperature measurement resistor (7), and an independent fan (8), and the temperature controller (1) is electrically connected with the vector frequency converter (2), the temperature measurement resistor (7), and the independent fan (8). The vector frequency converter (2) is electrically connected with the output reactor (3), the output reactor (3) is electrically connected with the contactor (4), the contactor (4) is electrically connected with the three-phase asynchronous motor (5), the three-phase asynchronous motor (5) is electrically connected with the water injection pump (6), the temperature measuring resistor (7) is fixed on the three-phase asynchronous motor (5), and the independent fan (8) is arranged on one side of the three-phase asynchronous motor (5).

Description

technical field [0001] The invention belongs to the technical field of oilfield water injection systems, and in particular relates to a motor temperature protection control system and method of a high-pressure water injection pump. Background technique [0002] At present, the oilfield water injection pump mainly adopts the plunger type water injection pump. The motor of the water injection pump is an ordinary three-phase asynchronous motor. Since the oilfield water injection needs continuous water injection, the motor of the water injection pump needs to work continuously for 24 hours a day. It works for a long time every year, and the temperature of the motor is high; especially Because the ambient temperature of the water injection pump room is high in summer, the surface temperature of the motor will exceed 80°C, which reduces the service life of the motor; After the reduction, the heat dissipation capacity of the coaxial fan of the motor decreases, which makes the tempe...

Claims

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Application Information

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IPC IPC(8): H02H7/08
CPCH02H7/0852
Inventor 冯建设刘汉斌王林平郑刚魏立军程颢晏耿成石磊郭煜锴杨孝刚
Owner PETROCHINA CO LTD
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