CN106894790A - A kind of link balance beam pumping unit - Google Patents

Abstract

The invention discloses a linkage balanced beam pumping unit, which belongs to the technical equipment field of petroleum exploitation, and in particular relates to a linkage balance beam pumping unit composed of a crank slider mechanism. The present invention mainly consists of asynchronous motor, bracket, beam, donkey head, left double slider, left double connecting rod, double shaft motor, double crank, right double connecting rod, right double slider, connecting rod, reducer, balance weight The technical solution is: the double-axis motor is fixedly installed on the beam, the output shaft of the motor is connected with the front end of the double crank, the other end of the double crank is connected with the left and right double connecting rods through the pin shaft, and the left and right double The connecting rod is equipped with left and right double sliders at respective tail ends through pin shafts, and rollers are set at the lower ends of the sliders. The side plate is welded at the edge of the beam to form a slideway, and the left and right double sliders are installed in the slideway, and the left and right double connecting rods push the slider to make a reciprocating linear motion along the length direction of the beam. The invention has the advantages of simple structure, safe and reliable use, and can adjust the balance moment of the beam according to the change of the suspension point load of the pumping unit, so as to achieve the purpose of saving energy and reducing consumption.

Description

A linkage balanced beam pumping unit

technical field

The invention belongs to the technical equipment field of petroleum exploitation, in particular to a linkage balanced beam pumping unit.

Background technique

The beam pumping unit is an important surface equipment for oil production in oil fields. It is simple in structure, stable and reliable, and is widely used in various oil fields. However, due to the large fluctuation of the load at the suspension point of the oil well and the generally poor balance effect of the beam pumping unit, the peak torque of the crank pin of the pumping unit is too large, and the power loss exceeds the standard. key. In order to solve the balance problem of the beam pumping unit, patents CN201420765751.8, CN201320762209.2, etc. have proposed the balance scheme of the screw guide rail, which controls the movement of the balance weight by installing the screw guide rail on the beam to achieve moment balance. In general, it can improve the balance rate of the pumping unit, but the manufacturing precision of the screw rod is high, and the large-scale pumping unit has a certain standard for the length of the screw rod, so it is difficult to meet the requirements of its production and processing. Patents such as CN201620884807.0 propose to install a balance adjustment device at the end of the beam of the pumping unit. This solution increases the complexity of the design and poses certain safety hazards. Aiming at the deficiency of the above-mentioned balance scheme, the present invention proposes a linkage balanced beam pumping unit.

Contents of the invention

The object of the present invention is to solve the existing problems of the beam pumping unit and provide a linkage balanced beam pumping unit with simple structure, safe and convenient use and good balancing effect.

In order to achieve the above object, the present invention adopts the following technical solutions.

A linkage balanced beam pumping unit of the present invention consists of an asynchronous motor, a bracket, a beam, a donkey head, a left double slider, a left double connecting rod, a double shaft motor, a double crank, a right double connecting rod, and a right double slider , connecting rod, reducer, balance weight, crank, and base.

The double-axis motor is fixedly installed above the bearing support position of the beam. The output shaft of the double-axis motor is connected to the head end of the double crank through the pin shaft, and the other end of the double crank is connected to the left double-link and the right double-link through the pin shaft. , the right double connecting rod is positioned at the both sides of biaxial motor, installs left and right double slider by bearing pin at the tail end of left and right double connecting rod, and roller is set at the lower end of left and right double slider. The left double connecting rods, the right double connecting rods, the left double sliders, the right double sliders and the double cranks on the beam are all symmetrically installed in parallel with respect to the longitudinal plane of the beam.

The cross-section of the beam is I-shaped, and the side plate is welded to the edge of the beam. Two parallel slideways are formed inside the beam, and the left and right double sliders are installed in the slideway of the beam.

The asynchronous motor transmits power to the reducer through the pulley, the output shaft of the reducer is connected to the crank through the key, the crank is connected to the connecting rod through the pin shaft, and a balance weight is fixedly installed at the end of the crank.

When working on the upstroke, the crank drives the balance weight to move downward to do work, and at the same time, the double-axis motor drives the double cranks to rotate in a plane, and the double cranks are linked to the left and right double connecting rods to perform plane motion. The left double connecting rod promotes the left double slider to move linearly to the right on the slideway of the traveling beam, and the right double connecting rod promotes the right double sliding block to move linearly to the right on the traveling beam. When the sucker rod moves to the top dead center position, the right double slider moves to the rightmost end of the beam, and the left double slider moves to the supporting position of the beam.

When the down stroke works, the left double connecting rod pushes the left double slide block to move to the left side of the beam, and the right double link pushes the right double slide block to move synchronously to the left side of the beam. When the sucker rod moves to the bottom dead center position, the left double slider moves to the leftmost end of the beam, and the right double slider moves to the supporting position of the beam. Through the reciprocating linear motion of the slider, the position of the left and right double sliders on the beam is adjusted, the balance moment of the beam is continuously changed, the peak torque of the crank pin of the pumping unit is reduced, and the purpose of energy saving and consumption reduction is realized.

Compared with the existing beam pumping unit, a linkage balance beam pumping unit of the present invention has the following advantages: 1. The linkage balance is realized by cranks, connecting rods and sliders, and the mechanical structure design is simple and It is safe and reliable to use. 2. By adopting the moving slider mechanism, the beam balance weight of the conventional beam pumping unit can be removed, and the balance weight can be attached to the slider. In order to reduce friction, a pulley is installed at the lower end of the slider, which is convenient for the left and right double sliders to act on the balance load on the full beam, so that the balance effect is more obvious and the structure is more evenly loaded. 3. The linkage balance described has the characteristics of quick return movement, which ensures the smooth and stable oil pumping speed of the upstroke in the stroke cycle, and increases the movement speed of the downstroke, which is beneficial to reduce the inertial load of the suspension point and the output torque of the reducer, and prolong the The service life of the equipment has a good energy-saving effect. 4. Cranks, connecting rods, sliders and other mechanisms are easy to install and adjust and have good interchangeability. They are suitable for different types of beam pumping units. You only need to choose cranks, connecting rods of appropriate size and appropriate quality according to the working conditions on site. slider.

Description of drawings

Fig. 1 is a structural schematic diagram of a linkage balanced beam pumping unit of the present invention.

Fig. 2 is a schematic three-dimensional view of the structure of a linkage balance device of a linkage balance beam pumping unit according to the present invention.

Fig. 3 is a schematic left view of the structure of a linkage balance device of a linkage balance beam pumping unit according to the present invention.

In the figure: 1-Asynchronous motor, 2-Bracket, 3-Walking beam, 4-Donkey head, 5-Left double slider, 6-Left double connecting rod, 7-Double shaft motor, 8-Double crank, 9-Right Double connecting rod, 10-right double slider, 11-connecting rod, 12-reducer, 13-balance weight, 14-crank, 15-base.

detailed description

The embodiments of the present invention will be further described in detail in conjunction with the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

As shown in Fig. 1, Fig. 2 and Fig. 3, a linkage balanced beam pumping unit of the present invention consists of an asynchronous motor 1, a bracket 2, a beam 3, a donkey head 4, a left double slider 5, and a left double connecting rod 6. Double shaft motor 7, double crank 8, right double connecting rod 9, right double slider 10, connecting rod 11, reducer 12, balance weight 13, crank 14, and base 15.

The biaxial motor 7 is fixedly installed above the bearing support position of the beam 3, with the output shaft of the biaxial motor 7 as the rotation center, the head end of the double crank 8 is connected through the pin shaft, and the other end of the double crank 8 is connected to the left side through the pin shaft. Double connecting rod 6 and right double connecting rod 9 are connected, and left double connecting rod 6 is positioned at the left side of biaxial motor 7, and left double slide block 5 is installed by bearing pin at the tail end of left double connecting rod 6, wherein left double slide block The lower end of 5 is provided with roller. Right double connecting rod 9 is positioned at the right side of biaxial motor 7, and right double slide block 10 is installed at the tail end of right double connecting rod 9 by bearing pin, and the roller identical with left double slide block 5 is provided with right double slide block 10 lower ends . The left double connecting rods 6, the right double connecting rods 9, the left double sliders 5, the right double sliders 10 and the double cranks 8 on the beam 3 are all symmetrically installed parallel to the longitudinal plane of the beam 3.

The cross section of the beam 3 is I-shaped. In order to prevent the slider from detaching from the beam 3, the side plate is welded to the edge of the beam 3, so that two parallel slideways are formed inside the beam 3. The left double slider 5 and the right Double slide block 10 is installed in the slideway of traveling beam 3, and slideway side plate plays the effect of safety protection.

The asynchronous motor 1 is the prime mover of the pumping unit, and the power is transmitted to the reducer 12 through the pulley. The output shaft of the reducer 12 is connected to the crank 14 through a key, and the crank 14 is connected to the connecting rod 11 through a pin shaft, and is fixed at the end of the crank 14. Balance weight 13.

When working, the asynchronous motor 1 drives the reducer 12 to drive the crank 14 to rotate clockwise or counterclockwise. During the upstroke work, the balance weight 13 moves downward to do work, and the biaxial motor 7 drives the double crank 8 to rotate in a plane, and the crank 8 is linked with the left double connecting rod 6 and the right double connecting rod 9 to make a planar movement. The left double connecting rod 6 promotes the left double slider 5 to move linearly to the right on the slideway of the traveling beam 3, and the right double connecting rod 9 promotes the right double sliding block 10 to move linearly to the right on the traveling beam 3. When the donkey head 4 drives the sucker rod to lift to the top dead center position, the right double slider 10 moves to the rightmost end of the beam 3, and the left double slider 5 moves to the supporting position of the beam 3. At this moment, the left double slider 5 The balance moment is not produced on the beam 3, and the right double slider 10 helps the asynchronous motor 1 to work to reach the maximum value of the balance moment.

During the down stroke, the load on the suspension point of the pumping unit decreases, the left double slider 5 moves to the left side of the beam 3, gradually increasing the load moment, and the right double slider 10 moves synchronously to the left side of the beam 3, gradually reducing the balance moment. When the sucker rod is lowered to the bottom dead center position, the left double slider 5 moves to the leftmost end of the beam 3, and the right double slider 10 moves to the supporting position of the beam 3. At this moment, the right double slider does not balance the beam 3 Moment, the left double slider 5 reduces the output peak torque of the asynchronous motor 1 by increasing the suspension point load. The positions of the left and right double sliders on the beam 3 are adjusted through the reciprocating linear motion of the sliders to achieve dynamic balance of moment.

The above is only the technical idea of the present invention, and does not limit the present invention in any way, nor does it limit the protection scope of the present invention. Any equivalent modifications and changes made within the spirit and principles of the present invention shall fall within the protection scope of the present invention.

Claims (3)

1. A linked and balanced beam pumping unit consists of an asynchronous motor (1), a bracket (2), a beam (3), a donkey head (4), a left double slider (5), a left double connecting rod (6 ), double shaft motor (7), double crank (8), right double connecting rod (9), right double slider (10), connecting rod (11), reducer (12), balance weight (13), The crank (14) and the base (15) are characterized in that: the biaxial motor (7) is fixedly installed above the bearing support position of the beam (3), and the output shaft of the biaxial motor (7) and the double crank (8) The first end is connected by a pin, and the other end of the double crank (8) is connected by a pin to the left double connecting rod (6) and the right double connecting rod (9), and the left double connecting rod (6) and the right double connecting rod (9) They are respectively located on both sides of the double shaft motor (7), and the left double slider (5) and the right double slider (10) are installed on the tail ends of the left double connecting rod (6) and the right double connecting rod (9) with pin shafts , and set the scroll wheel at the lower end of the slider. 2. A linkage balanced beam pumping unit according to claim 1, characterized in that: left double connecting rods (6), right double connecting rods (9), left double sliders (5), right double connecting rods The slide block (10) and the double crank (8) are all symmetrically installed in parallel with respect to the longitudinal plane of the beam (3). 3. A linkage balanced beam pumping unit according to claim 1, characterized in that: the cross section of the beam (3) is I-shaped, and the side plate is welded at the edge position, along the length direction of the beam (3). Two parallel slideways are formed, and the left double slide block (5) and the right double slide block (10) are installed in the slideway of the beam (3), and the slideway side plate prevents the slide block from breaking away from the slideway in the reciprocating linear motion.