WO2009009920A1

WO2009009920A1 - A balance pumping unit with a walking beam

Info

Publication number: WO2009009920A1
Application number: PCT/CN2007/002155
Authority: WO
Inventors: Chengqun Jin
Original assignee: Chengqun Jin
Priority date: 2007-07-13
Filing date: 2007-07-13
Publication date: 2009-01-22

Abstract

A balance pumping unit comprises a walking beam(9), a bracket(8), a mechanism for hanging ropes, a power unit, a driving rope(11), a driving roll, a balance weight(4), a pumping rod(5). The pumping rod(5) is at one side of the beam's gyration center by the equipment for hanging rope, while at the other side is the balance weight(4) by another equipment for hanging ropes. One end of the driving rope(11) is connected to equipment for hanging rope at one side of the beam's gyration center. And at the other end of the driving rope(11) is fixed at the driving roll or is connected to the equipment for hanging rope at the other side of the beam's gyration center.

Description

Balance beam pumping unit

The invention relates to an oil slinging device, in particular to a balance beam pumping unit. Background technique

The weight of the existing beam pumping unit, such as the CYJY pumping unit, is balanced by the centrifugal rotary counterweight, and the balance force is constantly changing due to the rotation of the counterweight. Achieve precise balance, so the commutation impact is large. At the same time, the reversal of the existing beam pumping unit is completely realized by the four-bar linkage ι^, so its mechanical efficiency is low. At the same time, if the stroke of the sucker rod is to be adjusted, it can only be done by heavy physical labor, which is not only labor intensive, but also difficult to adjust the stroke.

Therefore, the beam-type pumping mechanism of the four-bar linkage mechanism generally has large impact, low operating efficiency, large power consumption, and difficulty in adjusting the stroke, and the balance accuracy of the counterweight is not well adjusted, and the balance accuracy is poor. Summary of the invention

In view of the deficiencies of the prior art, the object of the present invention is to provide a pumping unit that does not employ a four-bar linkage mechanism, has a small commutation impact, is easy to adjust strokes, and has high precision, high efficiency, and energy saving.

The balance beam pumping unit provided by the present invention comprises a beam, a support frame, a lanyard mechanism, a power device, a drive rope, a drive wheel, a counterweight, a sucker rod, wherein the drive wheel is mounted on the pumping oil On the frame of the machine, the beam is mounted on the support frame through a support shaft, the support frame is mounted on the frame of the pumping unit, and the sucker rod and the counterweight are respectively located Both sides of the center of rotation of the beam are connected to the lanyard mechanism, and the power unit is connected to the driving wheel. One end of the driving rope is connected to the lanyard>the side of the swing center of the beam, the other end of the driving rope or the driving wheel is bypassed. It is connected to the lanyard 枳^ on the other side of the swing center of the beam, or to the drive wheel.

In a preferred embodiment, the power unit includes an electric motor and a gearbox, one end of the gearbox is coupled to an output shaft of the electric motor, and the power output end of the gearbox is coupled to the drive wheel Pick up.

In a preferred embodiment, the power unit includes an electric motor, a first pulley, a second pulley, and a belt, wherein the first pulley is mounted on an output shaft of the electric motor, and the second pulley is mounted on an axle of the driving wheel The belt is connected to the first pulley and the second pulley, and the output torque of the motor is greater than or equal to G, G is defined by: G=PxD/( 2χΚ ), where Ρ is the traction of the motor output , D is the diameter of the drive wheel,

Κ is the ratio of the diameter of the second pulley to the diameter of the first pulley, Ρ 3000 Ν to 50000 Ν; or,

The power unit includes an electric motor, a first sprocket, a second sprocket and a chain, wherein a first sprocket is mounted on an output shaft of the motor, and a second sprocket is mounted on the drive axle, the chain Connecting the first sprocket and the second sprocket, the output torque of the motor is greater than or equal to G, and G is defined by:

G=PxD/ ( 2χΚ ), where Ρ is the traction of the electric cymbal, D is the diameter of the drive wheel, and Κ is the ratio of the diameter of the second sprocket to the diameter of the first sprocket, Ρ 3000Ν to 50000Ν.

Preferably, the motor is a permanent magnet synchronous motor.

In a preferred embodiment, the power unit includes an electric motor, a first pulley, a second pulley, a belt, and a gearbox, wherein the first pulley is mounted on an output shaft of the electric motor, and the second pulley is mounted on the shifting On the input shaft of the box, the belt is connected between the first pulley and the second pulley.

In a preferred embodiment, the lanyard mechanism includes a head, a sling, and a lanyard mounted on the beam, the sling is coupled to the sling, and the lanyard is attached to the sling.

Preferably, the balance beam pumping unit further comprises a tensioning wheel for adjusting the tension of the driving rope and a guiding wheel for adjusting the direction of movement of the driving rope, the tensioning wheel and the guiding wheel are mounted on the frame, the driving rope The tensioning wheel, the driving wheel and the guiding wheel are bypassed, and the two ends of the driving rope are respectively connected to the lanyard structure on both sides of the swing center of the beam.

Preferably, the balance beam pumping unit further comprises a tightening device for adjusting the tension of the drive rope, by means of which the tensioning wheel is pressed against the drive rope.

Preferably, an electric control device and a positioning device are further provided, so that the power device rotates regularly in the normal direction and the reverse direction, and the commutation interval is adjusted, and the electronic control device is connected to the power device. It is also connected to the positioning device, which is mounted on the shaft of the power unit or drive wheel.

Preferably, the electronic control device and the positioning device are further included, so that the power device rotates regularly in the forward and reverse directions while adjusting the commutation interval, and the electronic control device is connected to the power device and is also connected to the positioning device. The positioning device is mounted on the shaft of the power unit or the drive wheel.

By adopting the balance beam pumping unit of the invention, the electric energy can be greatly saved, and the power saving is 40%-70% than that of the general beam pumping unit. Moreover, since the balance weight on the side of the sucker rod is increased, the mechanical impact of the driving device during the forward and reverse switching is small, and the precision of the balancing and balancing is also improved accordingly, and the balance precision can reach 96% or more.

The pumping unit with the positioning device also enables precise and easy adjustment of the stroke.

The pumping unit with the toothless transmission power device of the invention further reduces the energy consumption, and can greatly reduce the working noise and reduce the oil leakage of the system. DRAWINGS

The specific embodiment of the balance beam pumping unit provided by the present invention will be further described below with reference to the accompanying drawings. among them:

1 is a schematic structural view of a balance beam pumping unit of the present invention;

Figure 2 is a side view of the balance beam pumping unit shown in Figure 1;

3 is a schematic structural view of a balance beam pumping unit when the power unit includes only an electric motor, a pulley, and a belt;

Figure 4 is a plan view showing the structure of the balance beam pumping unit shown in Figure 3.

Figure 5 is a schematic view showing the structure of a balance beam pumping unit for pulling a beam by using a driving wheel and a driving rope;

Figure 6 is a plan view showing the structure of the balance beam pumping unit shown in Figure 5.

Figure 7 is a schematic view showing the structure of a balance type beam pumping unit in which the power unit includes only an electric motor, a pulley, a belt, and the traveling beam is driven by the driving wheel and the driving rope;

Figure 8 is a plan view showing the structure of the balance beam pumping unit shown in Figure 7.

Figure 9 is a schematic view showing the structure of a balance beam pumping unit when the power unit includes only an electric motor, a sprocket, and a chain;

Figure 10 is a plan view showing the structure of the balance beam pumping unit shown in Figure 9. Zero, part name and label in the figure:

1. Counterweight bracket 2, drive wheel carrier 3, drive wheel 4, counterweight

5, tensioning wheel 6, hoe rope 7, brake 8, support frame

9, the beam 10, the support shaft 11, the drive rope 12, the guide wheel

13, lanyard 14, suspension rope 15, sucker rod 16, guide wheel frame

17, gearbox 18, large pulley 19, belt 20, electric motor

21, small pulley 22, tightening screw 23, electric control cabinet 24, large sprocket

25, chain 26, small sprocket 30, frame 31, first hoe

32. Second hoe 33, third hoe 34, fourth hoe

Example 1

As shown in FIG. 1 and 2, an example of the present invention provides a balance beam pumping unit, including a beam 9, a support frame 8, a lanyard mechanism, a power unit, a drive rope 11, a counterweight 4, The sucker rod 15, the electric control device 23, and the electric motor 20. In the present embodiment, the power unit includes a first pulley 21, a second pulley 18, a belt 19, and a gearbox 17. Among them, the lanyard mechanism includes hoes 31, 32, 33, 34 and a sling rope 6, and a lanyard 13.

Wherein, the power unit includes an electric device and a transmission mechanism (such as an electric motor and a gear transmission), or a pneumatic device and a transmission mechanism, or a hydraulic power device and a transmission mechanism. Embodiments of the motor and transmission mechanism are employed in the present invention, but any suitable power supply and transmission equipment can be employed in practice.

The beam 9 is mounted on the support frame 8 via a support shaft 10, the support frame 8 is mounted on the frame 30 of the pumping unit, and the sucker rod 15 and the counterweight 4 are respectively located Both sides of the center of rotation of the beam 9 are connected to both sides of the beam 9 by a lanyard mechanism. In the present embodiment, the counterweight 4 is disposed on the side of the beam 9 opposite to the sucker rod 15. The weight of the counterweight 4 substantially balances the weight of the load on the side of the sucker rod, and the motor 20 drives the drive rope through the power unit. 11 and the tether 6 are moved so that only a small amount of electrical energy is required to rotate the beam 9 about the support shaft 10. Preferably, as shown, the position of the lanyard on the hoes 32, 33 is symmetrically disposed at the center of rotation of the beam 9. The electronic control unit 23 is connected to an electric motor, and an output shaft of the electric motor 20 is connected to the power unit. The electronic control device in the invention adopts the form of an electric control cabinet 23, and usually, an electric device such as a frequency converter, a programmable controller (PLC), a brake unit, a display unit, and the like are disposed in the electric control cabinet 23. The output end of the frequency converter is connected to the motor 20, and the motor 20 is regularly rotated and reversed under the control of the frequency converter, thereby realizing the rotation of the beam 9 around the support shaft 10 and the upward and downward reciprocating motion of the sucker rod.

In the present embodiment, the power unit further includes a first pulley 21, a second pulley 18, a belt 19, and a gearbox 17. A first pulley 21 is mounted on the output shaft of the motor 20, and the torque is transmitted to the second pulley 18 through the belt 19, and the second pulley 18 is connected to the gearbox. The gearbox is a gearbox having a plurality of sets of mutually meshing gears. The output shaft of the gearbox is connected to the drive wheel.

The drive rope 11 bypasses the drive wheel 3, the tension pulley 5 and the guide wheel 12, and both ends of the drive rope 11 are respectively connected to lanyard mechanisms mounted on both sides of the swing center of the beam. Specifically, the drive ropes 11 bypass the drive wheels 3, the tension pulleys 5, and the guide wheels 12, respectively. As shown, the drive wheel 3, the tensioning pulley 5 and the guide wheel 12 are mounted on the frame 30 of the pumping unit, and the tensioning pulley 5 abuts against the drive rope 11 to tension the drive rope 11 Thereby the transmission mechanism is driven efficiently. Preferably, the shaft of the tensioning pulley 5 is coupled to the tightening device 22 to adjust the tightness of the drive cable 11 and the wrap angle of the drive cable 11 on the drive wheel 3. The adjusting device 22 uses an adjusting screw to change the position of the wheel of the tensioning pulley 5.

Preferably, the pumping unit of the present embodiment further includes a weight bracket 1, and the weight bracket 1 is disposed below the weight 4 so that a collision accident does not occur when the weight 4 comes off.

Preferably, the positioning device is mounted on the output shaft of the motor or on the shaft of the drive wheel, and the positioning device is coupled to the electronic control device. The positioning device can use a photoelectric encoder, and other suitable position measuring devices can also be used, such as a counter/proximity switch. The positioning device transmits the position signal of the sucker rod to the electronic control unit 23, so that the electronic control unit 23 can control the movement stroke of the sucker rod at any time.

Example 2

3 is a schematic structural view of a balance beam pumping unit when the power unit includes only the electric motor 20, the first pulley 21, the second pulley 18, and the belt 19, and FIG. 4 is a balance beam pumping oil shown in FIG. Top view of the machine structure. Similar to the embodiment shown in FIGS. 1 and 2, the balance beam pumping unit includes a beam 9, a support frame 8, a lanyard mechanism, a power unit, a drive rope 11, a counterweight 4, and a sucker rod 15. , electric control device 23, electric motor 20. Among them, the lanyard ^ includes a hoe 31, 32, 33, 34, and a horse head rope 6, a lanyard 13. The balance beam pumping unit further includes a drive wheel 3, a tensioner wheel 5 and a guide wheel 12. The beam 9 is mounted on the support frame 8 via a support shaft 10, the support frame 8 is mounted on the frame 30 of the pumping unit, and the sucker rod 15 and the counterweight 4 are respectively located Both ends of the beam 9 are connected to both ends of the beam 9 by a lanyard mechanism. In the present embodiment, the counterweight 4 is disposed on the side of the beam 9 opposite to the sucker rod 15. The weight of the counterweight 4 substantially balances the weight of the load on the side of the sucker rod, and the motor 20 drives the drive rope through the power unit. 11 and the tether rope 6 are moved, so that only a small amount of electric power is required to rotate the beam 9 about the support shaft 10. Preferably, as shown, the position of the lanyard on the hoes 32, 33 is symmetrically disposed at the center of rotation of the beam 9.

The electronic control unit 23 is coupled to an electric motor, and an output shaft of the electric motor 20 is coupled to the power unit. The electronic control device of the present invention adopts the form of electronic control rejection 23, and is usually provided with an inverter, a programmable controller (PLC), a brake unit, a display unit and the like in the electronic control rejection 23. The output of the frequency converter is connected to the motor 20, and the motor 20 is regularly rotated and reversed under the control of the frequency converter, thereby realizing the rotation of the beam 9 around the support shaft 10 and the upward and downward reciprocating movement of the sucker rod.

However, in the present embodiment, there is no gear transmission, but a balance-type beam pumping unit using a toothless transmission. Adopting the gearless transmission mode, only a small power motor is used during operation, so the power saving efficiency is high, and the power saving is 40%-70% compared with the general beam pumping unit. Moreover, the simple belt drive has no noise and no oil leakage, and can overcome the defects of large running noise and serious oil leakage of the pumping unit using the transmission. In the present embodiment, since the torque of the motor is required to be large and the number of revolutions is low, a permanent magnet synchronous motor is usually employed.

Specifically, the power unit includes a first pulley 21, a second pulley 18, and a belt 19, wherein the first pulley 21 is mounted on an output shaft of the motor, and the second pulley 18 is mounted on the drive axle. The belt 19 connects the first pulley and the second pulley, and the output torque of the motor is greater than or equal to G, G is defined by:

G=PxD/ ( 2χΚ ), where Ρ is the traction of the motor output and D is the diameter of the drive wheel. K is the ratio of the diameter of the second pulley 18 to the diameter of the first pulley, and Ρ is 3000 Ν to 50,000 。. Example 3

Fig. 5 is a schematic structural view of a balance beam pumping unit for pulling a beam by means of a driving wheel and a driving rope; Fig. 6 is a plan view showing the structure of the balance beam pumping unit shown in Fig. 5.

The balance beam pumping unit comprises a beam 9, a support frame 8, a lanyard mechanism, a power unit, a drive rope 11, a drive wheel 3, a counterweight 4, a sucker rod 15, an electric control unit 23, and an electric motor 20. Among them, the lanyard mechanism includes a hoe 31, 32, 33 and a sling rope 6, and a lanyard 13. The beam 9 is mounted on the support frame 8 via a support shaft 10, the support frame 8 is mounted on the frame 30 of the pumping unit, and the sucker rod 15 and the counterweight 4 are respectively located Both ends of the beam 9 are connected to both ends of the beam 9 by a lanyard mechanism. The counterweight 4 is disposed on the side of the beam 9 opposite the sucker rod 15, and the weight of the counterweight 4 substantially balances the weight of the load on the side of the sucker rod. However, the weight on the side of the sucker rod is slightly larger than the weight on the side of the weight. Therefore, the sucker rod can be lowered by its own weight or lifted under the traction of the motor 20. The motor 20 drives the hammer rope 6 through the power unit, so that only a small amount of electric power is required to rotate the beam 9 about the support shaft 10.

In the present embodiment, the transmission mode of the transmission can also be employed, i.e., the power unit includes the first pulley 21, the second pulley 18, the belt 19, and the transmission 17. A first pulley 21 is mounted on the output shaft of the motor 20, and the torque is transmitted to the second pulley 18 through the belt 19, and the second pulley 18 is connected to the gearbox. The gearbox is a gearbox having a plurality of sets of mutually meshing gears. The output shaft of the gearbox is connected to the drive wheel 3.

Different from the above pumping unit: In the present embodiment, one end of the driving rope 11 is connected to the lanyard mechanism 33 of the beam 9 and the other end is connected to the wheel circumference of the driving wheel 3, and the pumping unit is not set to tighten. The wheel 5 and the guide wheel 12 and a lanyard mechanism are therefore relatively simple in structure and convenient to install.

Example 4

7 is a schematic structural view of a balance type beam pumping unit in which the power unit includes only an electric motor, a pulley, a belt, and the traveling beam is driven by the driving wheel and the driving rope, and FIG. 8 is a balance type beam pumping unit shown in FIG. Top view of the structure.

As shown, similar to the embodiment shown in Figs. 5 and 6, the drive cord 11 has one end connected to the lanyard mechanism and the other end connected to the wheel circumference of the drive wheel 3. More preferably, however, the pumping unit in the present embodiment also employs a toothless power unit as shown in FIGS. 3 and 4, so the model is The structure is the simplest, but requires a high torque, low speed motor, usually with a permanent magnet synchronous motor. Example 5

Fig. 9 is a schematic view showing the structure of a balance beam pumping unit when the power unit includes only an electric motor, a sprocket, and a chain; and Fig. 10 is a plan view showing the structure of the balance beam pumping unit shown in Fig. 9.

In this embodiment, the drive rope 11 bypasses the drive wheel 3, the tension pulley 5 and the guide wheel 12, and both ends of the drive rope 11 are respectively coupled to the lanyard mechanisms mounted on both ends of the beam. Specifically, the drive ropes 11 bypass the drive wheels 3, the tension pulleys 5, and the guide wheels 12, respectively. As shown, the drive wheel 3, the tensioning pulley 5 and the guide wheel 12 are mounted on the frame 30 of the pumping unit, and the tensioning pulley 5 abuts against the drive rope 11 to tension the drive rope 11 Thereby the transmission mechanism is driven efficiently. Preferably, the shaft of the tensioning pulley 5 is coupled to the tightening device 22 to adjust the degree of tightness of the drive cable 11 and the wrap angle of the drive cable 11 on the drive wheel 3. The adjusting device 22 uses an adjusting screw to change the position of the axle of the tensioning pulley 5.

However, unlike the previous embodiment, this embodiment uses a sprocket chain method instead of the belt transmission. Specifically, the power unit includes a first sprocket 26, a second sprocket 24, and a chain 25. The first sprocket 26 is coaxially mounted on the output shaft of the motor 20, and the diameter of the first sprocket 26 is small. The drive axle of the pumping unit is mounted to the frame by bearings, and a second sprocket 24 and a drive wheel 3 are coaxially mounted on the drive axle, the second sprocket 24 having a larger diameter than the first sprocket 26. The first sprocket 26 and the second sprocket 24 are connected by a chain 25. Since the second sprocket 24 is fixed to the drive axle (e.g., by an interference fit or a keyed coupling), the chain 25 can transmit the output torque and rotational speed of the motor 20 to the drive axle.

Embodiment, preferably, the motor 20 using ₇ ja hereby synchronous machine in the present embodiment, more preferably selected output torque 300Nm above, the output power 5-45Kw, the rotational speed of the synchronous machine ₇ j hereby 500rpm or less. In the present embodiment, a zigzag motor having a rated output torque of 1200 Nm, a rated output of 10.7 kW, and a rated speed of 85 rpm is used. This is because the synchronous motor can meet the requirements of high torque and low speed, which not only helps to save energy, but also avoids the noise generated when the high speed motor works, and further reduces the overall working noise of the pumping unit.

The chain transmission structure of the pumping unit has the characteristics of large transmission torque, so that a large pumping unit that requires a large traction force can adopt such a pumping unit.

Although the invention has been described in terms of the preferred embodiments described above, The formula is not limited to the above embodiment. It will be appreciated that various changes and modifications of the invention may be made by those skilled in the art without departing from the scope of the invention.

Claims

Rights request

A balance beam pumping unit, comprising: a beam, a support frame, a lanyard mechanism, a power unit, a drive line, a drive wheel, a counterweight, a sucker rod, wherein the drive wheel is mounted On the frame of the pumping unit, the beam is mounted on the support frame via a support shaft, the support frame is mounted on a frame of the pumping unit, the sucker rod and the The weights are respectively located on both sides of the swing center of the beam and are respectively connected with the lanyard mechanism, the power device is connected with the driving wheel, one end of the driving rope is connected to the lanyard mechanism on one side of the swing center of the beam, and the other end of the driving rope or The drive wheel is connected to the lanyard of the other side of the swing center of the beam or to the drive wheel.

2. The balance beam pumping unit according to claim 1, wherein the power unit comprises an electric motor and a gearbox, one end of the gearbox is connected to an output shaft of the electric motor, and the power output end of the gearbox is Connected to the drive wheel.

3. The balance beam pumping unit according to claim 1, wherein the power unit comprises an electric motor, a first pulley, a second pulley, and a belt, wherein the first pulley is mounted at an output of the motor On the shaft, a second pulley is mounted on a shaft of the drive wheel, the belt is connected to the first pulley and the second pulley, and an output torque of the motor is greater than or equal to G, G is defined by:

G=PxD/ ( 2xK ), where P is the traction of the motor output, D is the diameter of the drive wheel, and K is the ratio of the diameter of the second pulley to the diameter of the first pulley, P is 3000N to 50000N; or

G=PxD/ ( 2χΚ ), where Ρ is the traction of the motor output, D is the diameter of the drive wheel, and Κ is the ratio of the diameter of the second sprocket to the diameter of the first sprocket, Ρ 3000Ν to 50000Ν.

4. The balance beam pumping unit according to claim 3, wherein the motor is a 7j synchronous motor.

5. The balance beam pumping unit according to claim 1, wherein the power unit comprises an electric motor, a first pulley, a second pulley, a belt, and a gearbox, wherein the first pulley is mounted on the On the output shaft of the motor, a second pulley is mounted on the input shaft of the transmission, and the belt is coupled between the first pulley and the second pulley.

The balance beam pumping unit according to any one of claims 1 to 5, wherein the lanyard mechanism comprises a hoe, a hoe rope and a lanyard mounted on the beam, the raft The head rope is connected to the hoe, and the lanyard is attached to the hoe rope.

7. The balance beam pumping unit according to claim 6, further comprising: said tensioning wheel and a guide wheel are mounted on the frame, and the driving rope bypasses the tensioning wheel, the driving wheel and the guiding wheel, And the two ends of the driving rope are respectively connected to the lanyard mechanisms on both sides of the swing center of the beam.

8. The balance beam pumping unit according to claim 7, further comprising a tightening device for adjusting the tension of the driving rope, by which the tensioning wheel is pressed against the driving rope .

9. The balance beam pumping unit according to claim 8, further comprising an electric control device and a positioning device, so that the power device rotates regularly in the normal direction and in the opposite direction, and adjusts the commutation interval thereof. The electronic control device is connected to the power device and is also connected to the positioning device, and the positioning device is mounted on the shaft of the power device or the driving wheel.

10. The balance beam pumping unit according to claim 6, further comprising an electric control device and a positioning device, so that the power device rotates regularly in the normal direction and in the opposite direction, and adjusts the commutation interval thereof. The electronic control device is connected to the power device and is also connected to the positioning device. The positioning device is mounted on the shaft of the power device or the drive wheel.