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Speed control device for belt pumping unit

A technology of speed control device and pumping unit, applied in the direction of speed/torque control of a single motor, production fluid, wellbore/well components, etc., can solve problems such as power grid loss, equipment impact, gear damage, etc., to prolong life , Reduce the effect of mechanical shock

Pending Publication Date: 2020-06-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the reversing process of the belt pumping unit, that is, when the polished rod reaches the upper dead point and the lower dead point, due to the increase of the load, the input shaft shifts and the gear is damaged, which brings impact to the equipment and affects the performance of the motor. Operating efficiency, which will not only increase the energy consumption of the motor itself, but also cause additional losses to the power grid, reducing the capacity of the power grid and the utilization rate of transformer equipment

Method used

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  • Speed control device for belt pumping unit
  • Speed control device for belt pumping unit
  • Speed control device for belt pumping unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: A speed control device for a belt pumping unit, including a pumping unit, and also includes a signal collector 1 for detecting the position of the polished rod, and a signal collector 2 for detecting the angular displacement of the motor, used for collecting electrical parameters The signal collector III also includes a control unit for signal reception and processing.

[0019] Signal receiver 1 is proximity switch 1, and proximity switch 1 is arranged on the pumping unit and corresponds to the position of the bottom dead point of the polished rod; signal receiver 2 includes proximity switch 2, and proximity switch 2 is arranged on the protective cover of the cooling fan. Iron sheets are arranged on the leaves, and the proximity switch is set eccentrically with the rotating shaft of the cooling fan and corresponds to the iron sheet. Electrically connected, the control unit is a programmable logic controller PLC, the input module of the programmable logic c...

Embodiment 2

[0021] Embodiment two: see figure 1 , figure 2 and image 3 , Proximity switch 1 and proximity switch 2 both use LJ18A3-8-Z / BX, electrical parameter collector uses T-1420, programmable logic controller PLC uses T-910, T-910 is connected with control buttons, relays and touch screen, The touch screen model is TPC7062TXPLC, and the touch screen can display the current working status and output frequency. The module that provides power for the device uses a switching power supply with input DC 400-800V and output DC24V.

[0022] Analyze the relationship between the displacement of the polished rod and the rotational speed of the motor through the data collected by the signal collector: the complete motion stroke is time-segmented, and a complete stroke is divided into an upstroke and a downstroke, such as figure 1 As shown, -- represents the velocity curve of the polished rod; ... represents the acceleration curve of the polished rod, the horizontal axis is the stroke, and th...

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Abstract

The invention provides a speed control device for a belt pumping unit, and belongs to the field of pumping unit devices. The technical scheme adopted by the invention is that the speed control devicefor the belt pumping unit comprises the pumping unit, and is characterized by further comprising a signal collector 1 for detecting the position of a polished rod, a signal collector 2 for detecting the angular displacement of an electric motor, and a third signal collector for collecting electrical parameters, and also comprising a control unit for signal reception and processing. The speed control device has the beneficial effects that the position of the polished rod of the belt pumping unit is monitored in real time, and when the polished rod is close to a dead point, treatment measures are taken in advance to reduce the mechanical impact during reversing and prolong the life of a mechanical system of the pumping unit.

Description

technical field [0001] The invention relates to the field of oil pumping units, in particular to a speed control device for a belt type oil pumping unit. Background technique [0002] The belt pumping unit is a long-stroke, slow-stroke, purely mechanically driven pumping unit with an international leading level. It is easy to operate, easy to maintain, and safe to use. The pumping unit is the most widely used beamless pumping unit in the world. However, during the reversing process of the belt pumping unit, that is, when the polished rod reaches the upper dead point and the lower dead point, due to the increase of the load, the input shaft shifts and the gear is damaged, which brings impact to the equipment and affects the performance of the motor. This will not only increase the energy consumption of the motor itself, but also cause additional losses to the power grid, reducing the capacity of the power grid and the utilization rate of transformer equipment. Therefore, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00E21B47/008H02P6/08
CPCE21B43/121H02P6/08
Inventor 孙东李炜齐光峰范路王强周亮肖志勇
Owner CHINA PETROLEUM & CHEM CORP