CN200971771Y

CN200971771Y - Coaxial secondary crank balance beam unit

Info

Publication number: CN200971771Y
Application number: CN 200620035826
Authority: CN
Inventors: 王德玉
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2006-09-30
Filing date: 2006-09-30
Publication date: 2007-11-07
Anticipated expiration: 2016-09-30

Abstract

The utility model relates to a coaxial secondary crank balanced pumping unit, which is mainly composed of a rope hanger, a donkey head, a beam, a bracket, a beam, a connecting rod, a primary balance crank, a gear box, and a pulley. The secondary balance crank and counterweight are added, the secondary balance crank shaft is set on the primary balance crank shaft, and the axes of the two shafts coincide; in the gearbox, a speed-up shaft and gear are added, and the output shaft and gear of the secondary balance crank form a secondary balance crank shaft. The speed-up transmission of the balance of the secondary crank; one of the connections between the secondary balance crank and the primary balance crank and its shaft is splined. On the basis of the primary crank balance of the conventional beam pumping unit, the utility model adds a coaxial secondary crank balance structure with different rotational speeds to stabilize the peaks and troughs of the motor torque load curve and reduce the rated power of the configured motor, thereby Improve the working efficiency of the pumping unit system.

Description

A kind of coaxial quadric crank balanced oil extractor

Technical field

The utility model relates to a kind of crank balanced pumping unit that is used for the oil exploitation process.

Background technology

Beam pumping unit is because it is simple in structure, and is sturdy reliable, at home and abroad accounts for more than 90% in the oil pumper sum.The nearly oil pumper of China is more than 100,000, and its year power consumption exceedes 10,000,000,000 KW.h, and average efficiency was about for 26% (external average level is about 30%), and energy-saving potential is big.The oil pump energy-saving technology mainly concentrates on two aspects, and the one, reduce power consumption from motor and power supply aspect; The 2nd, improve the operating efficiency of oil pumper by the counterbalance effect that improves beam pumping unit.The various beam-pumping units that use generally adopt crank balance and beam balance at present, and its motor torque load pulsation amplitude is big, thereby needs the motor power (output) of configuration bigger, and promptly so-called " low load with strong power " causes the oil pumping system operational efficiency low.

The utility model content

The purpose of this utility model is to provide a kind of coaxial quadric crank balanced oil extractor, on the basis of an original crank balance of common beam oil pumper, increase the quadric crank balanced structure of a coaxial different rotating speeds, stabilize the crest and the trough of motor torque load curve, reduce to dispose the rated power of motor, thereby improve the operating efficiency of pumping unit system.

For achieving the above object, the technical scheme of this novel beam formula oil pumper is: set up a speedup axle and a quadric crank balance output shaft behind the output shaft (solid shafting) of original oil pumper two stage reducer, quadric crank balance output shaft is a hollow shaft, it is sleeved on outside the solid output shaft, the dead in line of two output shafts, the secondary balancing crank is fixedly connected on the hollow output shaft.Thereby realize the transmission of quadric crank balance and make compact conformation, solve the difficulty that the space is arranged.

A kind of coaxial quadric crank balanced oil extractor, mainly form by polished rod eye, horse head, walking beam, support, crossbeam, connecting rod, once balance crank, gear-box, belt pulley etc., it is characterized in that, secondary balancing crank and balance weight have been set up, the secondary balancing crank axle is sleeved on the once balance crank axle, the diaxon dead in line; In gear-box, set up speedup axle and gear, secondary balancing crank output shaft and gear, constitute the speedup transmission of quadric crank balance; Have one to connect and adopt spline to connect in secondary balancing crank and once balance crank and its be connected, thereby the initial phase difference of secondary balancing crank and once balance crank can be regulated; The arm of force of balance weight also is to regulate on the secondary balancing crank.

Compared with prior art, the utility model has structurally been set up quadric crank balance and speed increasing gear transmission, the function and the sturdy reliable characteristic that have not only kept existing beam-pumping unit, and the fluctuation that can effectively stabilize the Motor torque load, reduce torque peak greatly, reduce motor configurations power, improve the pumping unit system operational efficiency greatly; Adopt two output shaft deads in line, solved the difficulty on secondary balancing crank installing space is arranged, can increase the radius and the balance weight weight of secondary balancing crank, improve the effect of quadric crank balance.

Description of drawings

Fig. 1 is the utility model structural representation

Fig. 2 is the utility model Motor torque schematic diagram

Fig. 3 is the utility model deceleration speedup transmission schematic diagram

The specific embodiment

Referring to Fig. 1, Fig. 2, Fig. 3, a kind of coaxial quadric crank balanced oil extractor, mainly form by polished rod eye 11, horse head 12, walking beam 13, support 14, crossbeam 15, connecting rod 16, once balance crank 9, gear-box 10, belt pulley 17 etc., it is characterized in that, secondary balancing crank 8 and balance weight have been set up, secondary balancing crank axle L is sleeved on the once balance crank axle J, the diaxon dead in line; In gear-box 10, set up speedup axle K and gear 5,6, secondary balancing crank output shaft L and gear 7 constitute the speedup transmission of quadric crank balance; Have one to connect and adopt spline to connect in secondary balancing crank 8 and once balance crank 9 and its be connected, thereby the initial phase difference of secondary balancing crank and once balance crank can be regulated; The arm of force of balance weight also is to regulate on the secondary balancing crank.

The utility model in use, polished rod eye 11 is connected with rod string, belt pulley 17 be connected by the belt motor.Belt pulley power shaft H in gear-box rotates, and driven

gear

1,2,3,4 rotates, and the rotating speed that makes gear 4 reach fixedly connected with it output shaft J is reduced to the rotating speed of requirement.Once balance crank 9 is fixedlyed connected with output shaft J (solid shafting), and crank 9 rotates with output shaft J and drivening rod 16 motions, and connecting rod 16 drags walking beam 13 by crossbeam 15 and swings up and down.Horse head 12 is fixed on an end of walking beam 13, and polished rod eye 11 usefulness steel cables are walked around the horse head circular arc and are fixed on the horse head, moves back and forth up and down so polished rod eye 11 swings up and down with horse head, pumps thereby the drive rod string moves back and forth up and down.Gear 4 is driven gear 5 and axle K rotation simultaneously, rotates together through gear 6,7 drive hollow shaft L and secondary balancing crank, and the rotating speed of hollow shaft L is designed to 2 times of output shaft J (solid shafting) rotating speed.When not having the quadric crank balance, the load torque of motor is shown in curve a, the secondary balancing crank is curve b to the load torque of motor, the load torque peak value of motor reduces greatly under the quadric crank balanced action, and the load torque minimum value of motor is raised, and the torque curve of motor is shown in curve c as a result.When curve a moment of torsion was maximum, the secondary balancing crank was horizontal and moves downward, and helped motor work; When curve a moment of torsion hour, the secondary balancing crank is horizontal and moves upward, and needs the acting of motor drives secondary balancing crank; The result reduces the operation torque curve fluctuation amplitude of motor greatly.So, just can reduce the power of motor that oil pumper disposes, avoid the situation of " low load with strong power ", thereby improve the operational efficiency of pumping unit system.Can regulate the initial phase difference of secondary balancing crank and once balance crank, make counterbalance effect reach best.

Claims

1 A coaxial secondary crank balanced pumping unit, mainly composed of a rope hanger (11), a donkey head (12), a beam (13), a bracket (14), a beam (15), a connecting rod (16), Composed of a primary balance crank (9), a gear box (10), and a pulley (17), it is characterized in that a secondary balance crank (8) and a counterweight are added, and the secondary balance crank shaft (L) is set on the primary balance On the crank shaft (J), the axes of the two shafts coincide.

2. The coaxial secondary crank balanced pumping unit according to claim 1, characterized in that, in the gear box (10), a gear speed-up shaft (K) and gears (5), (6) are added, and the secondary The output shaft (L) and the gear (7) of the balanced crank form a speed-up transmission with secondary crank balance.

3. The coaxial secondary crank balanced pumping unit according to claim 1, characterized in that one of the connections between the secondary balanced crank (8) and the primary balanced crank (9) and its shaft is splined. .