CN100526598C - Inverted pendulum variable-pitch beam pump - Google Patents

Abstract

The present invention relates to a reverse pendulum variable pitch walking-beam pumping unit. It is characterized by that in the upper portion of tail beam a curved rack guideway is fixed, the reverse pendulum balacing weight is movably fixed on the tail beam, its fixed point is positioned in the centre of fixed point of said curved rack guideway, in the middle portion of pendulum bar of reverse pendulum balancing weight a motor is fixedly connected. Said motor can be reciprocally moved on the curved rack guideway, and can be used for driving balancing weight and making it be reciprocally moved. Said invention also includes a controller, said controller can be used for detecting, analyzing and judging motor load change and giving out control signal to said motor so as to greatly raise motor efficiency.

Description

Inverted pendulum torque converter beam pumping unit

technical field

The invention relates to oil pumping equipment used in oil exploitation, in particular to an inverted swing variable moment beam pumping unit.

Background technique

At present, most oil wells in my country have entered the stage of mechanical production. The conventional beam pumping unit is widely used in various oil fields due to its simple structure, good reliability and easy maintenance. With the increase of its quantity, its shortcoming of high energy consumption becomes more and more prominent, so the energy-saving transformation of the beam pumping unit has become a main research direction at present. Due to the inherent four-bar linkage mechanism of the beam pumping unit, the working load changes approximately in a sinusoidal curve. Through the crank balance method, the load curve basically conforms to the sinusoidal curve change trend; by adding a balance block on the beam, the load changes The curve is relatively smooth, but because the beam balance weights currently used are all fixed or simply changed, the pumping unit cannot be kept in the best energy-saving state.

Contents of the invention

The object of the present invention is to provide an inverted pendulum variable moment beam pumping unit, so that the moment of the slider changes with the change of the suspension point load, so that the moment of the slider can "shave the peak" for the original suspension point load. The function of "Pinggu" makes the motor work in a constant torque state, so as to achieve the purpose of energy saving.

An inverted pendulum variable moment beam pumping unit of the present invention comprises a tail beam 9, a motor 13, and a balance weight 5. An arc-shaped rack guide rail 8 is fixed on the upper part of the tail beam 9, and the inverted pendulum balance weight 5 is movable and fixed. On the tail beam 9, the fixed point is located in the middle of the fixed point of the arc-shaped rack guide rail 8, and the middle part of the pendulum 6 of the inverted balance weight 5 is fixedly connected with a motor 7, and the motor 7 can reciprocate on the arc-shaped rack guide rail 8 Move, and drive balance weight 5 to do reciprocating swing.

As a further preferred mode of the present invention, it also includes a controller 14, the controller 14 contains a control chip, which can detect, analyze, and judge the load change of the motor 13, and send a control signal to the motor 7, and then control the swing position of the lower single pendulum .

Among them, the controller 14 detects the change of the relevant parameters of the motor 13, judges the load change of the motor, and through software analysis, sends instructions to the motor 7, and the motor drives the inverted balance weight 5 to move along the rack guide rail 8. Due to the force When the arm changes, the balance load generated by the inverted balance weight 5 changes accordingly, and finally realizes the "peak shaving and flat valley" of the motor load, making the motor 13 work in a constant load mode, improving the working efficiency of the motor, and realizing the purpose of energy saving .

Compared with the prior art, the present invention makes the motor 13 work in a constant load mode, improves the working efficiency of the motor, and realizes the purpose of energy saving.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Detailed ways

As shown in Figure 1, the pumping unit of the present invention includes a rope suspension 1, a donkey head 2, a beam 3, a support 4, a balance weight 5, a swing rod 6, a motor 7, an arc rack guide rail 8, a tail beam 9, and a connecting rod. Rod 10, reducer 11, crank 12, motor 13, controller 14, brake device 15, base 16.

The present invention is obtained by transforming the conventional post-mounted beam pumping unit. An inverted pendulum device is added to the upper ends of the beam and the tail beam. , The motor 7 can reciprocate along the arc rack guide rail 8, driving the balance weight 5 to swing back and forth.

During the downstroke, the balance weight 5 swings to the right end (facing the drawing) gradually, so that an extra load can be applied to the motor 13, thereby preventing the donkey head 2 from doing work on the motor 13. When the suspension point of the donkey head 2 is at the bottom dead center, the balance weight 5 swings to the far right, so that the moment produced by the balance weight 5 is the maximum value, which fully plays the role of "flat valley".

During the upstroke, due to a peak in the load of the motor 13, the balance weight 5 swings from the rightmost end to the left end, and the motor 7 moves on the arc-shaped rack guide rail 4 to provide power dragging, and the moment generated by the balance weight 5 gradually decreases , so that the load of the motor 13 will not change too much. When the suspension point of the donkey head 2 is at the top dead center, the balance weight 5 is at the extreme left, so that the moment generated by the balance weight 5 is the minimum value, which plays the role of "peak cutting".

During the swinging process of the balance weight 5, the relevant parameters of the motor 13 are detected by the controller 14, the value of the instant load change curve is judged, and the torque generated by the balance weight 5 is calculated through program analysis, and then the motor 7 is controlled to drag the load backward. Pendulum, so that it is in a proper position, and balance the load fluctuation of the electric motor 13 inherent in the conventional pumping unit to the greatest extent, so that the load of the electric motor 13 is always in a constant load state.

Claims (2)

1, a kind of inverted pendulum variable-pitch beam pump, it is characterized in that: comprise tail boom (9), motor (13), balance weight (5), tail boom (9) top is fixed with an arc-shaped rack guide rail (8), the piece of falling the pendulum type balance (5) activity is fixed on the tail boom (9), fixed point is positioned at the centre of the fixed point of arc-shaped rack guide rail (8), the fork of fixedlying connected (a 6) middle part fixedly connected motor (7) with the piece of falling the pendulum type balance (5), motor (7) can move back and forth on arc-shaped rack guide rail (8), and drive balance weight (5) is done reciprocally swinging.

2, inverted pendulum variable-pitch beam pump according to claim 1, it is characterized in that: also comprise a controller (14), controller (14) contains control chip, can detect, analyze, judge motor (13) load variations, and send control signal, and then control single pendulum swing position down to motor (7).

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