CN100554687C - Oil sucker with eccentric wheel and without beam - Google Patents

Abstract

A beamless sliding eccentric pumping unit used for mechanical oil recovery in oilfields. The bracket is a cuboid quilted frame structure. The suspension wheel and the balance wheel are respectively located at the left and right ends of the beam on the top of the bracket. The middle and left ends of the beam are provided with guide grooves. , the beam can move along the fixed bolt through the guide groove; the balance belt is connected with the balance box through the balance wheel, and the balance box moves up and down along the guide rope through two guide wheels; The upper end of the rod is connected, the central axis can move up and down along the slide rail, one end of the suspension belt is fixed on the eccentric wheel, and the other end is connected with the belt suspension through the suspension wheel; one end of the power belt is fixed on the bracket, and the other end is fixed on the power wheel ; The lower end of the connecting rod is connected with the crank pin on the reducer crank. The invention has the structural characteristics of the crank and connecting rod of the beam pumping unit, adopts a sliding eccentric mechanism, has a long stroke, is convenient for balance adjustment, is convenient to operate, saves electric energy, is convenient for workover operations, and is applicable to crude oil production needs of various oil fields.

Description

Beamless Sliding Eccentric Pumping Unit

technical field

The invention relates to oil field mechanical oil production equipment, in particular to a beamless sliding eccentric pumping unit.

Background technique

At present, in oil field mechanical oil production equipment, there are two types of beam pumping units and beamless pumping units. Among them, the patent number of "extended range long-stroke pumping unit with no beam chain" is ZL87103481. This pumping unit Although the range-extending wheel structure is adopted, the chain transmission is still used, which has the problems of easy damage to the chain and poor lubrication conditions, which affects the service life of the whole machine; another example is the patent number of "double variable diameter balance wheel pumping unit": ZL952246236, Although this type of pumping unit adopts the coaxial and eccentric structure of large and small variable diameter wheels, the stroke is still limited to a certain extent. Therefore, the existing technology cannot meet the needs of oil field production with long stroke, convenient operation and maintenance, and long service life. .

Contents of the invention

The purpose of the present invention is to provide a beamless sliding eccentric pumping unit, which overcomes the shortcomings of the existing beamless pumping unit and provides a new type of pumping unit with simple structure, advanced technology and long service life for oil exploitation.

The technical scheme that the present invention solves its technical problem adopts is as follows:

Beamless sliding eccentric wheel pumping unit includes: balance box, guide wheel, guide rope, balance belt, balance wheel, beam, fixing bolts, axle, suspension wheel, suspension belt, suspension device, power belt, eccentric wheel , power wheel, central shaft, connecting rod, balance weight, crank, crank pin, output shaft, reducer, large pulley, V-belt, motor, bracket, base; it is characterized in that: the bracket is a cuboid quilting structure, and the suspension wheel The balance wheels are respectively located at the left and right ends of the beam on the top of the bracket. There are guide grooves in the middle and left end of the beam. The beam and the bracket are connected by fixing bolts. The beam can move left and right along the fixing bolts through the guide grooves; the balance belt is connected to the balance box through the balance wheels. , There are guide wheels on both sides of the balance box, and the guide wheels move up and down along the guide rope; the eccentric wheel and the power wheel are coaxial and located in the center of the bracket, and there are weight-reducing holes on the power wheel and the eccentric wheel. The upper end of the connecting rod is connected, the central axis can move up and down along the slide rail on the bracket, one end of the suspension belt is fixed on the eccentric wheel, the other end is connected with the suspension belt through the suspension wheel, and the suspension belt is connected with the polished rod; one end of the power belt is fixed On the upper part of the bracket, the other end is fixed on the power wheel, and the direction of rotation is opposite to that of the suspension belt; the lower end of the connecting rod is connected with the crank pin on the crank of the reducer.

The beam pumping unit without sliding eccentric wheel manufactured according to the above scheme retains the characteristics of the crank-link mechanism of the beam pumping unit, adopts the structure of sliding eccentric wheel, and the stroke has been further increased. The power wheel and the power belt, eccentric wheel Always maintain the best transmission angle (90°) with the suspension belt, and adopt compound balance, which is convenient for balance adjustment and saves electric energy. During oil well workover operations, the suspension wheel and beam can move to the right, which is convenient for workover operations It is suitable for various oilfield crude oil production needs.

Description of drawings

Figure 1 - a schematic diagram of the front view of the present invention.

Fig. 2-the left view structure schematic diagram of the present invention

In the accompanying drawings, 1-balance box, 2-guide, 3-fixing bolt, 4-balance belt, 5-balance wheel, 6-axle, 7-beam, 8-suspension wheel, 9-suspension belt, 10 - Bracket, 11- slide rail, 12- power belt, 13- eccentric wheel, 14- power wheel, 15- weight reduction hole, 16- belt sling, 17- polished rod, 18- central shaft, 19- connecting rod, 20 - Balance weight, 21- crank, 22- crank pin, 23- crank hole, 24- output shaft, 25- guide wheel, 26- reducer, 27- guide rope, 28- large pulley, 29- triangle belt, 30- Electric motor, 31-base.

Detailed ways

Implementation of the present invention will be further elaborated below in conjunction with accompanying drawing:

The present invention comprises: balance box 1, guide wheel 25, guide rope 27, balance belt 4, balance wheel 5, crossbeam 7, fixed bolt 3, wheel axle 6, suspension weight wheel 8, suspension weight belt 9, suspension belt device 16, power Belt 12, eccentric wheel 13, power wheel 14, central shaft 18, connecting rod 19, balance weight 20, crank 21, crank pin 22, output shaft 24, reducer 26, large pulley 28, V-belt 29, motor 30, bracket 10. The base 31; the bracket 10 is a cuboid quilting frame structure, the suspension wheel 8 and the balance wheel 5 are respectively located at the left and right ends of the beam 7 on the top of the bracket 10, the middle and left end of the beam 7 are provided with guide grooves 2, the beam 7 and the bracket 10 Connected by the fixed bolt 3, the beam 7 can move left and right along the fixed bolt 3 through the guide groove 2; Move up and down; the eccentric wheel 13 and the power wheel 14 are coaxial and integrated, and are located in the center of the bracket 10. The power wheel 14 and the eccentric wheel 13 are provided with a lightening hole 15, and the central shaft 18 on the power wheel 14 is connected to the upper end of the connecting rod 19. The central shaft 18 can move up and down along the slide rail 11 on the bracket 10, one end of the suspension belt 9 is fixed on the eccentric wheel 13, and the other end is connected with the suspension 16 through the suspension pulley 8, and the suspension 16 is connected with the polished rod 17; One end of the power belt 12 is fixed on the support 10 top, and the other end is fixed on the power wheel 14, and the rotation direction is opposite to the rotation direction of the suspension belt 9; the lower end of the connecting rod 19 is connected with the crank pin 22 on the reducer 26 crank 21.

Working principle: The motor 30 converts electrical energy into mechanical energy. The small pulley on the motor 30 drives the large pulley 28 on the reducer 26 through the V-belt 29. After deceleration, the output shaft 24 drives the crank 21 to rotate. The crank pin installed on the crank 21 22 drives the connecting rod 19, and the connecting rod 19 drives the central shaft 18, so that the central shaft 18 drives the eccentric wheel 13 and the power wheel 14 along the slide rail 11 to change the rotary motion of the crank 21 into an up and down motion, and the eccentric wheel 13 and the power wheel 14 move upward , rotate counterclockwise at the same time, so that the suspension belt 9 drives the polished rod 17 to move downward through the suspension wheel 8 and the suspension device 16. When the eccentric wheel 13 and the power wheel 14 move downward, they rotate clockwise at the same time, so that the suspension The belt 9 drives the polished rod 17 to move upward through the suspension wheel 8 and the belt suspension 16, thereby realizing oil pumping production.

Claims (1)

1. A beamless sliding eccentric wheel pumping unit used in oil fields, including: balance box, guide wheel, guide rope, balance belt, balance wheel, beam, fixing bolts, wheel axle, suspension wheel, suspension belt, Suspension device, power belt, eccentric wheel, power wheel, central shaft, connecting rod, balance weight, crank, crank pin, output shaft, reducer, large pulley, V-belt, motor, bracket, base; it is characterized in that: bracket It is a cuboid quilting frame structure. The suspension wheels and balance wheels are respectively located at the left and right ends of the beam on the top of the support. The middle and left ends of the beam are provided with guide grooves. The beam and the bracket are connected by fixing bolts. The beam can move left and right along the fixing bolts through the guide grooves; The balance belt is connected to the balance box through the balance wheel. There are guide wheels on both sides of the balance box, and the guide wheels move up and down along the guide rope; the eccentric wheel and the power wheel are coaxially integrated and located in the center of the bracket. hole, the central shaft on the power wheel is connected to the upper end of the connecting rod, the central shaft can move up and down along the slide rail on the bracket, one end of the suspension belt is fixed on the eccentric wheel, and the other end is connected to the suspension belt through the suspension wheel One end of the power belt is fixed on the upper part of the bracket, the other end is fixed on the power wheel, and the rotation direction is opposite to that of the suspension weight belt; the lower end of the connecting rod is connected with the crank pin on the crank of the reducer.

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