WO2008131610A1 - Pumping nuiit without gear driving - Google Patents

Pumping nuiit without gear driving Download PDF

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Publication number
WO2008131610A1
WO2008131610A1 PCT/CN2007/002347 CN2007002347W WO2008131610A1 WO 2008131610 A1 WO2008131610 A1 WO 2008131610A1 CN 2007002347 W CN2007002347 W CN 2007002347W WO 2008131610 A1 WO2008131610 A1 WO 2008131610A1
Authority
WO
WIPO (PCT)
Prior art keywords
motor
pumping unit
pulley
rope
drive
Prior art date
Application number
PCT/CN2007/002347
Other languages
French (fr)
Chinese (zh)
Inventor
Chengqun Jin
Original Assignee
Wuxi Dpl Petroleum Machine Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN 200710098039 external-priority patent/CN101037936A/en
Priority claimed from CN 200710097714 external-priority patent/CN101046145A/en
Application filed by Wuxi Dpl Petroleum Machine Co., Ltd. filed Critical Wuxi Dpl Petroleum Machine Co., Ltd.
Publication of WO2008131610A1 publication Critical patent/WO2008131610A1/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/12Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E21B43/121Lifting well fluids
    • E21B43/126Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B47/00Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
    • F04B47/02Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level

Definitions

  • the invention relates to an oil recovery device, in particular to a toothless transmission oil pumping machine. Background technique
  • the pumping unit belongs to the oil-mining machine. At present, the pumping unit is driven by the electric motor, and the sucker rod is driven up and down by the gear reducer to perform the pumping operation.
  • Patent Application No. 200410011020.5 discloses a pumping machine comprising a main frame, an electric control rejection, a counterweight, a suspension rope, a pumping rod, a motor, a small Parts such as gears, large gears, crown wheels and gearboxes.
  • the oil absorbing rod is connected with the suspension rope
  • the motor is connected through the coupling and the reduction gear box
  • the large gear, the sky wheel and the hoisting wheel are fixed to each other, and are mounted on the sun gear shaft through the bearing
  • the sun gear shaft fastener is used for the sun gear shaft Fasten.
  • the motor drives the reduction gear box through the coupling, and the pinion gear and the large gear connected to the output shaft of the reduction gear box mesh, so that the balance wheel fastened together with the large gear gear rotates regularly and in the opposite direction. , driving the sucker rod to reciprocate up and down.
  • the motor transmits torque to the sky wheel through the reduction gear box, and drives the sky wheel to rotate, thereby completing the up and down reciprocating motion of the sucker rod, but if it is to satisfy the work of high torque and low speed, Therefore, the gear structure in the reducer is required to be complicated, for example, a multi-stage gear is required to achieve deceleration and increase torque. Due to the difficulty in manufacturing the transmission gears in the reducer, the complicated reducer is more difficult to manufacture and the manufacturing cost is higher, and the operation of the meshing gear during operation causes a large noise, and oil leakage from the reduction gearbox. It also appears frequently.
  • the weight of the counterweight usually has several tons of weight, it is necessary to use the motor to pull and lift the counterweight during installation and maintenance, so the output power of the motor is required to be large, and the motor usually performs normal pumping operations. Only a relatively small output power is required, thus causing a waste of motor power.
  • the object of the present invention is to provide a pumping unit which has a simple structure, low running noise, no oil leakage problem, low required output power of the motor and low cost.
  • the toothless transmission pumping unit disclosed in the present invention comprises a main frame, a bracket, a motor, a sucker rod, a suspension rope, a counterweight, a drive shaft, a drive rope, a drive wheel, a first pulley, a second pulley and a belt;
  • the bracket is located at the top of the main frame, the bracket has a platform, the motor is mounted on the platform of the bracket, the drive shaft is mounted on the bracket, the driving wheel is mounted on the driving shaft, the sucker rod and the suspension
  • the rope is connected to the counterweight by a drive rope that bypasses the drive wheel, the first pulley is mounted on the output shaft of the motor, and the second pulley is mounted on the drive shaft, the belt is connected to the first pulley and the first pulley
  • G is defined by:
  • G PxD/ ( 2 ⁇ ) , where ⁇ is the traction of the motor output, D is the diameter of the drive wheel, and ⁇ is the ratio of the diameter of the second pulley to the diameter of the first pulley.
  • is the traction of the motor output
  • D is the diameter of the drive wheel
  • is the ratio of the diameter of the second pulley to the diameter of the first pulley.
  • the motor is a permanent magnet synchronous motor.
  • the rotational speed of the motor is greater than or equal to ⁇ , and ⁇ is defined by:
  • n 2 L S K/ ( ⁇ ⁇ ) , where L is the stroke of the sucker rod, S is the stroke of the sucker rod, K is 0-10, and the diameter D of the drive wheel is 0.3m-1.2m.
  • the gearless transmission pumping unit further comprises a position measuring device, wherein the position measuring device comprises a counting disc and a proximity switch, the counting disc is mounted on an output shaft of the driving shaft or the motor, and receives the signal of the counting disc position.
  • the proximity switch is connected to the control device, and the control device is connected to the motor, outputs a voltage of a set frequency to the motor, and rotates the motor forward and reverse according to a signal generated by the position measuring device.
  • the toothless transmission pumping unit further comprises a position measuring device, wherein the position measuring device is a photoelectric encoder, and the photoelectric encoder is mounted on an output shaft of the driving shaft or the motor, and is connected to the control device.
  • the control device is connected to the motor, outputs a voltage of a set frequency to the motor, and rotates the motor in the forward and reverse directions according to a signal generated by the position measuring device.
  • the toothless transmission pumping unit further comprises a safety rope, one end of which is fastened to the weight and the other end is fastened to the driving wheel.
  • the bottom of the pumping unit frame is provided with an adjusting top wire and a roller.
  • the toothless transmission pumping unit further comprises a guide for maintaining vertical movement of the counterweight a mechanism, and the guiding mechanism is mounted on the counterweight, the counterweight moving along the guiding mechanism.
  • the toothless transmission pumping unit further comprises a hoisting machine, the hoisting machine is arranged on the platform of the bracket, and the hoisting machine is connected with the counterweight through the connecting device.
  • the connecting device comprises a hoisting rope, a fixed pulley, a moving pulley and a hoisting rope holder, wherein the movable pulley is connected with the counterweight, one end of the hoisting rope is connected with the hoist, and the other end of the hoisting rope is connected to the fixed pulley and the movable pulley to On the hoisting rope holder.
  • the toothless drive pumping unit further comprises a guiding device mounted on the platform of the bracket, the drive rope bypassing the guiding device.
  • the invention also provides a toothless transmission pumping unit, comprising a bracket, a motor, a sucker rod, a suspension rope, a counterweight, a drive shaft, a drive rope, a drive wheel, a first sprocket, a second sprocket and a chain
  • the motor is mounted on a bracket, the drive shaft is mounted on the bracket, the drive wheel is mounted on the drive shaft, and the sucker rod and the suspension rope pass the drive rope and the counterweight bypassing the drive wheel
  • a first sprocket is mounted on the output shaft of the motor, and a second sprocket is mounted on the drive shaft, the chain connecting the first sprocket and the second sprocket; the rated output of the motor
  • the torque is greater than or equal to G, and G is defined by:
  • G PxD/ ( 2 ⁇ ), where ⁇ is the traction of the motor output, D is the diameter of the drive wheel, and ⁇ is the ratio of the diameter of the second sprocket to the diameter of the first sprocket.
  • the pumping unit of the present invention adopts the design of the gearless transmission, the processing difficulty and the manufacturing cost are greatly reduced. Due to the belt drive, the transmission noise is significantly reduced, and the working noise is usually less than 55db. The problem of oil leakage was solved because there was no gearbox crusting. Its simple structure also greatly reduces manufacturing costs.
  • toothless transmission pumping unit of the present invention low-speed, high-torque output can be realized with only a low-power motor and a simple structure.
  • the power of the main motor can be significantly reduced as compared with when the counterweight is directly lifted by the main motor.
  • the winch not only can increase the counterweight, but can also be used as a crane during workover operations.
  • FIG. 1 is a schematic structural view of a toothless transmission pumping unit according to a first embodiment of the present invention
  • Figure 2 is a left side view of the toothless transmission pumping unit shown in Figure 1;
  • Figure 3 is a schematic view showing the structure of a toothless transmission pumping unit having a hoist according to a second embodiment of the present invention
  • Figure 4 is a left side view of the toothless transmission pumping unit shown in Figure 3;
  • FIG. 5 is a plan view of the toothless drive pumping unit of Figure 3. detailed description
  • the pumping unit f includes a pumping mechanism, a counterweight 4, a drive shaft 18 mounted on the bracket 17, a drive wheel 19 mounted on the drive shaft 18, and an electric control rejection 1
  • the motor 8, the first pulley 9, the belt 11, and the second pulley 12, the pumping mechanism and the counterweight are connected by a drive rope 16 that bypasses the drive wheel.
  • the pumping mechanism includes a sucker rod 13 and a suspension rope 14.
  • the pumping unit further includes: an electric control circuit 1 connected to the motor 8 and outputting a set frequency and voltage to the motor, and the electronic control rejection 1 is used as a control device for controlling the motor.
  • the output shaft of the motor 8 has a first pulley 9 connected to a second pulley 12 mounted on the drive shaft via a belt 11 to transmit torque of the motor output shaft to the drive shaft 18 .
  • an inverter In the electronic control rejection 1, an inverter, a programmable controller (PLC), a brake unit, a display unit, and the like are provided.
  • a frequency converter is a device that converts alternating current with constant voltage and frequency into alternating voltage of voltage or frequency.
  • a frequency converter for motor control that changes both voltage and frequency.
  • the output of the inverter is connected to the motor 8 to operate the motor 8 at a certain frequency and voltage.
  • PLCs and other industrial computers such as microcontrollers
  • the display unit provides the user with an interface for human-computer interaction.
  • the motor 8 can be used with all motors that can meet the pumping conditions.
  • the traction force P is equal to the difference between the gravity of the balance between the sucker rod 13 and the counterweight 4, and also includes the resistance generated during the pumping operation. Traction P according to well depth and well The situation is different.
  • the traction force P of the motor output is 5880N to 29400N.
  • K is preferably 0-10
  • the drive wheel diameter D is preferably 0.3m-1.2m.
  • G 1 OOONm
  • n 64rpm that is, the rated output torque of the motor should be Above 1000Om, the rated output speed of the motor should be greater than 64 rpm. Therefore, in this embodiment, a permanent magnet synchronous motor with a rated output torque of 1200 Nm and a rated rotational speed of 85 rpm is selected.
  • a permanent magnet synchronous motor is preferably used, and a permanent magnet synchronous motor having an output torque of 300 Nm or more, an output of 5-45 Kw, and a rotation speed of 500 rpm or less is selected.
  • a permanent magnet synchronous motor having a rated output torque of 800 Nm, a rated output of 8 kw, and a rated rotational speed of 85 rpm is used.
  • the permanent magnet synchronous motor has to meet the requirements of high torque and low speed, which not only saves energy, but also avoids noise generated when the high speed motor works, further reducing the noise. The overall working noise of the pumping unit.
  • the motor 8 is mounted on the platform of the bracket 17, and the first pulley 9 is coaxially mounted on the output shaft of the motor 8, as shown in Fig. 1, the diameter of the first pulley 9 is small.
  • the drive shaft 18 of the pumping unit is also mounted on the platform of the bracket 17 via a bearing 21, and a second pulley 12 is coaxially mounted on the drive shaft 18, the second pulley 12 having a larger diameter than the first pulley 9.
  • the first pulley 9 and the second pulley 12 are connected by a belt 11. Since the second pulley 12 is fixed to the drive shaft 18 (e.g., by an interference fit or a keyed connection), the belt 1 1 can transmit the output torque and rotational speed of the motor 8 to the drive shaft 18.
  • the torque output to the second pulley 12 is twice the output torque of the motor 8, and is output to the second pulley 12.
  • the rotational speed is one-half of the output speed of the motor 8.
  • the pumping unit adopts a first-stage belt transmission.
  • the present invention can adopt various belt transmission modes, for example, a transmission method using a multi-stage belt, and preferably a two-stage belt transmission method.
  • the diameter of the driving pulley is smaller than the diameter of the driven pulley.
  • the belt may be installed in parallel, for example, between the first pulley 9 and the second pulley 12 6-8 belts.
  • the belt 1 1 can be of various suitable belts, such as a V-belt, a toothed belt, etc.
  • the belt 11 is a V-belt.
  • a drive wheel 19 is also fixed to the drive shaft, and a groove for accommodating the drive rope 16 is provided on the circumference of the drive wheel 19, so that the drive rope 16 can easily bypass the drive wheel 19.
  • One end of the drive rope 16 is connected to the suspension rod 14, and the suspension rope 14 is connected to the sucker rod 13, and the other end of the drive rope 16 is connected to the weight 4.
  • the counterweight 4 is set to balance the torque generated by the sucker rod 13.
  • the sucker rod 13 can move up and down in the vertical direction.
  • the counter disk 22 and the proximity switch 20 are employed as position measuring means for controlling the reverse rotation of the motor 8.
  • the counter disk 22 is coaxially fixed to the drive shaft 18, and a proximity switch 20 is provided on the platform of the bracket 17 and a small gap is left between the counter disk, and the proximity switch 20 is a magnetic switch. .
  • the proximity switch 20 counts the number of revolutions of the drive shaft 18.
  • the proximity switch 20 sends a signal to the electric control cabinet 1 to cause the PLC to reverse the motor 8 through the frequency converter. turn.
  • the position measuring device composed of the above counter disk 22 and the proximity switch 20 may be disposed on the platform of the bracket 17 and the drive shaft 18, or may be disposed in other portions of the transmission mechanism, for example, on the output shaft of the motor 8.
  • the position measuring device is not limited to the counting disc/proximity switch described above, and other suitable position measuring devices may be employed, such as a photoelectric encoder or the like.
  • a safety cord 15 is also provided in this embodiment.
  • One end of the safety cord 15 is fixed to the drive wheel 19, and the other end of the safety rope 15 is fastened to the counterweight 4 around the drive wheel 18.
  • the counterweight 4 is lowered, and the counterweight 4 drives the safety rope 15 to rotate the drive wheel 19 at a high speed, thereby causing the motor 8 to be overloaded.
  • the brake of the motor 8 10 brakes, the safety rope 15 tightens the weight, so that the weight can not fall freely, can avoid collision accidents.
  • the weight When the pumping unit is installed, the weight is lifted by the motor 8 to lift the weight, and the suspension 14 is lowered, so that the sucker rod 13 can be connected to the suspension 14.
  • the safety line 15 can be removed from the counterweight and used as a sling for the space small crane.
  • a guide wheel 5 as a guide mechanism is provided on the counterweight 4, and the guide rope 6 is sandwiched between the guide wheels 5 so that the movement direction is always vertical during the vertical movement of the counterweight 4.
  • an adjustable top wire 3 is provided at the bottom of the frame 7 to adjust the entire frame level.
  • a roller 2 is also provided at the bottom of the frame 7.
  • the pumping unit including a pumping mechanism, a motor, a counterweight, a drive shaft mounted on the bracket, a drive wheel mounted on the drive shaft, a first sprocket and a second sprocket
  • the pumping The mechanism and counterweight are connected by a drive rope that bypasses the drive wheel.
  • the oil pumping mechanism comprises: a sucker rod and a suspension rope.
  • the pumping unit further includes: a control reject connected to the motor and outputting a voltage of a set frequency to the motor, the control being rejected as a control device.
  • a first sprocket is disposed on the output shaft of the motor, and a second sprocket is mounted on the drive shaft.
  • the control device can still adopt the form of electronic control rejection, and an electronic device such as a frequency converter, a programmable controller (PLC), a brake unit, and a display is disposed in the electronic control rejection.
  • the output of the inverter is connected to the motor to operate the motor at a certain frequency and voltage.
  • the PLC can achieve further control of the frequency converter.
  • the motor uses a high-torque permanent magnet synchronous motor, and the high-torque permanent magnet synchronous motor is still regulated by an inverter that is electrically rejected.
  • the traction force ⁇ is equal to the difference between the gravity of the sucker rod and the counterweight balance, and also includes the resistance in the pumping operation.
  • Traction ⁇ varies depending on the depth of the well and the well condition.
  • the traction force of the motor output is 5880 ⁇ to 29400 ⁇ .
  • is preferably 0-10, and the drive wheel diameter D is preferably 0.3m-1.2m.
  • a high-torque permanent magnet synchronous motor with a rated output torque of 1300 Nm, a rated output power of 20 kw, and a rated rotational speed of 200 rpm is selected.
  • the motor is mounted on the platform of the bracket, and the first sprocket is coaxially mounted on the output shaft of the motor, and the diameter of the first sprocket is small.
  • the drive shaft of the pumping unit is also mounted on the platform of the bracket, and a second sprocket is coaxially mounted on the drive shaft, the second sprocket having a larger diameter than the first sprocket.
  • the first sprocket and the second sprocket are connected by a chain.
  • the chain can transmit the output torque and speed of the motor to the drive shaft. Through the chain drive, it can withstand a larger load than the belt.
  • the torque output to the second sprocket is twice the output torque of the motor
  • the rotational speed output to the second sprocket is the motor output. One-half of the speed.
  • the drive shaft will rotate under the driving of the motor.
  • a drive wheel is fixed on the drive shaft, and a groove for accommodating the drive rope is arranged on the circumference of the drive wheel, whereby the drive rope bypasses the drive wheel, one end of the drive rope is connected to the suspension rope, and the suspension rope is connected to the sucker rod; The other end of the drive cord is connected to the counterweight.
  • the sucker rod can move up and down in the vertical direction.
  • a photoelectric encoder is employed as the position measuring device, and the photoelectric encoder can be disposed on the motor output shaft.
  • the working principle of the photoelectric encoder is well known to those skilled in the art and will not be described herein.
  • FIG. 3 is a schematic structural view of a toothless transmission pumping unit having a hoist according to a second embodiment of the present invention
  • FIGS. 4 and 5 are respectively a left side view and a top view of the toothless transmission pumping unit.
  • the pumping unit includes a main frame 301, a bracket 308, a motor 310, a brake 31 1 , a control device 309, a sucker rod 304, a suspension 321, a weight 314, a drive shaft 330, and a drive rope. 318.
  • the top of the main frame 301 has a bracket 308, the bracket 308 has a platform, the driving shaft 330 is mounted on the bracket 308, the driving wheel 329 is mounted on the driving shaft 330, the sucker rod 304 and the suspension rope
  • the 321 is coupled to the weight 314 by a drive cord 318 that bypasses the drive wheel 329.
  • the control device may take the form of an electronically controlled rejection 309.
  • the electronic control device 309 is provided with an electronic device such as a frequency converter, a programmable controller (PLC), a braking unit, and a display unit.
  • the inverter converts alternating current with constant voltage and frequency into voltage or frequency.
  • a frequency converter for motor control that changes both voltage and frequency.
  • the output of the frequency converter is connected to the motor 310 to operate the motor 310 at a certain frequency and voltage.
  • PLCs and other industrial computers can achieve further control of the frequency converter.
  • the display unit provides the user with an interface that can perform human-computer interaction.
  • manual control of the pumping unit is achieved by an electronically controlled dial 303 connected to the electronically controlled reject 309, which is located at a position convenient for the operator to operate, such as on the security door 302.
  • the motor 310 is mounted on a platform of a bracket 308, and a brake 31 1 is mounted on the motor 310, and the brake 31 1 stops the motor under the control of the electronically controlled 309.
  • the motor 310 is only used to provide torque and power during the pumping process, and is not responsible for the individual lifting of the weight 314. Therefore, the torque, power and other parameters of the motor 310 need only meet the requirements of driving the sucker rod 304.
  • the motor 310 rotates regularly in the normal direction and the reverse direction under the control of the electric control 309.
  • the driving rope 318 wound on the driving wheel 329 drives the weight 314 and the sucker rod 304.
  • the upper and lower reciprocating movements cause the pumping crucible 304 to drive the oil pump to extract the oil.
  • the hoist 328 is also mounted on the platform of the bracket 38.
  • the hoist 328 can draw the counterweight 314 directly through the hoisting rope 320, or it can be towed by other attachment means. For example, in the present embodiment, traction can be saved by pulling the counterweight 314 through the pulley assembly.
  • one end of the hoisting rope 320 is connected to the output end of the hoisting machine 328.
  • the hoisting rope 320 bypasses the fixed pulley 326, and then passes around the movable pulley 319, and the other end is fixed to the hoisting rope holder 325.
  • the hook on the movable pulley 319 is hung on the weight 314, and the hoisting machine 328 is activated by operating the electronic control panel 33, so that the weight 314 can be raised.
  • Using the winch 328 to lift the counterweight 314 can greatly reduce the power used by the motor 310 as compared to the manner in which the motor 310 directly lifts the weight box 314.
  • the winch 328 can not only increase the counterweight, but also can be used as a crane during workover.
  • a guide device is further mounted on the platform of the bracket 308, and the guide device includes: a guide wheel 334, a guide wheel shaft 335, a guide wheel frame 306, a support hinge shaft 332, and a guide wheel bearing 336.
  • the guide wheel carrier 306 is secured to the platform of the bracket 308 by a support hinge shaft 332.
  • the guide wheel 334 is fixed to the guide wheel axle 335, and the guide wheel axle 335 is guided by the guide axle
  • the carrier 336 is mounted on the guide wheel carrier 306.
  • One end of the drive cord 318 is connected to the weight 314, and the other end is connected to the suspension rod 321 across the circumference of the guide wheel 334 after bypassing the drive wheel 329.
  • the suspension 321 is connected to the sucker rod 304.
  • the arrangement of the guides maintains a distance between the pumping unit and the well, so by retracting the guide and the pumping mechanism (for example by rotating the guide wheel frame 306 about the support hinge shaft 332), sufficient maintenance can be provided for the well repair. Repair the work space without the need to move the pump unit as a whole.
  • the above-described guiding means may not be provided, and the driving rope 318 is only connected to the pumping mechanism and the weight 314 by bypassing the driving wheel 329, and these embodiments are still applicable to the pumping unit of the present invention.
  • a safety line 316 is coupled between the weight 314 and the drive wheel 329.
  • One end of the safety line 316 is fixed on the driving wheel 329, and the other end is connected to the weight 314.
  • the sucker rod 304 is disconnected, the weight 314 is lowered, and the weight 314 drives the safety line 316 to rotate the driving wheel 329 at a high speed.
  • the motor 310 generates an overload.
  • the brake 31 1 of the motor 310 brakes, and the safety line 316 tightens the weight 314, so that the weight 314 cannot be freely dropped, thereby avoiding a collision accident.
  • the transmission in the present embodiment is realized by a belt transmission.
  • the belt drive includes a first pulley 322, a second pulley 324, and a belt 323.
  • the first pulley 322 is coaxially mounted on the output shaft of the motor 310. As shown in FIG. 3, the diameter of the first pulley 322 is small.
  • the drive shaft 330 of the pumping unit is mounted on the bracket 308 via a bearing 331 on which the second pulley 324 and the drive wheel 329 are mounted, and the second pulley 324 has a larger diameter than the first pulley 322.
  • the first pulley 322 and the second pulley 324 are connected by a belt 323.
  • the belt 323 can transmit the output torque and rotational speed of the motor 310 to the drive shaft 330.
  • the torque output to the second pulley 324 is twice the output torque of the motor 310, and is output to the second pulley 324.
  • the rotational speed is one-half of the output speed of the motor 310.
  • the pumping unit adopts a first-stage belt transmission mode.
  • the present invention can adopt various belt transmission modes, for example, a multi-stage belt transmission method, for example, a two-stage belt transmission mode can be adopted.
  • the diameter of the driving pulley is smaller than the diameter of the driven pulley.
  • the belt in order to drive a larger load, can be in parallel
  • a plurality of installed, for example, 6-8 belts can be installed between the first pulley 322 and the second pulley 324.
  • the belt 323 can be of various suitable belts, such as a V-belt, a toothed belt, etc. In order to extend the life of the belt 323, the belt 323 is a V-belt.
  • the motor 310 can be used with all motors that can satisfy the pumping conditions.
  • the traction force ⁇ is equal to the difference in gravity between the sucker rod 304 and the counterweight 3 14 , and also includes the resistance generated in the pumping operation. Traction ⁇ varies depending on the depth of the well and the well condition.
  • the traction force of the motor output is ⁇ 3000 ⁇ to 50,000 ⁇ .
  • is preferably 0-10, and the drive wheel diameter D is preferably 0.2m - 1.5m.
  • a sprocket chain can also be used in place of the belt drive. That is, the transmission includes a first sprocket, a second sprocket, and a chain. Wherein, the first sprocket is coaxially mounted on the output shaft of the motor 310, and the diameter of the first sprocket is small.
  • the drive shaft 330 of the pumping unit is mounted on the bracket 308 via a bearing 33 1 on which a second sprocket and a drive wheel 329 are coaxially mounted, the second sprocket having a larger diameter than the first sprocket.
  • the first sprocket and the second sprocket are connected by a chain. Since the second sprocket is fixed to the drive shaft 330 (e.g., by interference fit or keying), the chain can transmit the output torque and rotational speed of the motor 3 10 to the drive shaft 330.
  • the motor 310 is a permanent magnet synchronous motor, and a permanent magnet synchronous motor having an output torque of 300 Nm or more, an output of 5-45 Kw, and a rotational speed of 500 rpm or less is selected.
  • a zigzag motor having a rated output torque of 800 Nm, a rated output of 8 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 position measuring device is employed to control the reverse rotation of the motor 10.
  • a counter disk and a proximity switch are used as the position measuring device.
  • the counter disk is coaxially fixed to the drive shaft 330, and a proximity switch is provided on the platform of the bracket 308 with a small gap left between the counter and the counter.
  • the proximity switch is a magnetic switch. In the working stroke of the sucker rod 304, the proximity switch counts the number of revolutions of the drive shaft. When the predetermined number of revolutions is reached, the proximity switch sends a signal to the control device to cause the electronically controlled switch 309 to control the motor 310 to reverse.
  • the position measuring device described above may also be provided at other parts of the pumping unit, for example, on the output shaft of the motor 310.
  • the position measuring device is not limited to the above-mentioned counter/proximity switch, and other suitable position measuring devices may be employed, such as a photoelectric encoder or the like.
  • the main frame 301 is preferably formed into a cylindrical structure which is a semi-enclosed space in which the upper and lower sides are ventilated.
  • the cylindrical structure is preferably a cylindrical structure, so that the cylindrical weight 314 located in the cylindrical frame can be normally operated up and down without wind disturbance, which obviously improves the reliability of the pumping unit operation and safety.
  • the main frame 301 is further provided with an escalator 305, and a lower portion of the main frame 301 is provided with a security door 302 to prevent the pumping unit parts inside the main frame 301 from being stolen.
  • An electronic control panel 303 is disposed on the back of the security door 302. Through the electronic control panel 303, the operator can control the electronic control device in the entire electronically controlled rejection 309.

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  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

A pumping unit without gear driving comprises a main frame(7,301), a carrier(17,308), a motor(8,310), a pumping rod(13,304), a mule-head hanger(14,321), a balance weight(4,314), a driving shaft(18,330), driving lines(16,318), a driving wheel(19,329), a first belt pulley(9,322), a second belt pulley(12,324) and belts(11,323). The carrier(17,308) mounted on the top of the main frame(7,301) provides with a plat on which the motor(8,310) is mounted; The driving shaft(18,330) is fixed on the carrier(17,308). The pumping rod(13,304) and the mule-head hanger(14,321) connect with the balance weight(4,314) through driving lines(16,318) wound on the driving wheel(19,329) which is mounted on the driving shaft(18,330). The first belt pulley (9,322) is mounted on an output shaft of the motor(8,310) and the second belt pulley(12,324) is mounted on the driving shaft(18,330). The first belt pulley(9,322) is connected to the second belt pulley(12,324) through the belts. The pumping unit have many advantages, such as compact structure, lower noise, no oil leakage, lower power required and lower cost.

Description

无齿传动抽油机 技术领域  Gearless transmission pumping unit
本发明涉及采油装置, 尤其涉及一种无齿传动抽油机。 背景技术  The invention relates to an oil recovery device, in particular to a toothless transmission oil pumping machine. Background technique
抽油机属于石油开采机械, 目前, 抽油机通过电动机驱动, 通过齿轮 减速器, 带动抽油杆上下往复运动, 从而进行抽油作业。  The pumping unit belongs to the oil-mining machine. At present, the pumping unit is driven by the electric motor, and the sucker rod is driven up and down by the gear reducer to perform the pumping operation.
申请号为 200410011020.5 的专利申请"抽油修井机"公开了一种抽油 机械, 该抽油修井机包括主框架、 电控拒、 配重、 悬绳器、 抽油光杆、 电 机、 小齿轮、 大齿轮、 天轮和减速箱等部件。 其中, 抽油光杆与悬绳器相 连, 电机经过联轴器和减速箱连接, 大齿轮、 天轮及卷扬轮相互固定, 并 通过轴承安装在天轮轴上, 天轮轴用天轮轴紧固器紧固。 在抽油工作时, 电机通过联轴器带动减速箱运转, 与减速箱输出轴相连的小齿轮和大齿轮 啮合, 从而使与大齿轮紧固在一起的天轮有规律地正、 反向旋转, 带动抽 油杆上下往复运动。  Patent Application No. 200410011020.5, the "dumping workover rig" discloses a pumping machine comprising a main frame, an electric control rejection, a counterweight, a suspension rope, a pumping rod, a motor, a small Parts such as gears, large gears, crown wheels and gearboxes. Wherein, the oil absorbing rod is connected with the suspension rope, the motor is connected through the coupling and the reduction gear box, the large gear, the sky wheel and the hoisting wheel are fixed to each other, and are mounted on the sun gear shaft through the bearing, and the sun gear shaft fastener is used for the sun gear shaft Fasten. During the pumping operation, the motor drives the reduction gear box through the coupling, and the pinion gear and the large gear connected to the output shaft of the reduction gear box mesh, so that the balance wheel fastened together with the large gear gear rotates regularly and in the opposite direction. , driving the sucker rod to reciprocate up and down.
在上述抽油修井机中, 电机通过减速箱将转矩传递到天轮, 带动天轮 旋转, 进而完成抽油杆的上下往复运动, 但是如果要满足大扭矩、 低转速 的工作 ^牛, 则要求减速器中的齿轮结构复杂, 例如需要多级齿轮实现减 速、 增扭矩。 由于减速器中传动齿轮 ^制造难度较大, 因此复杂的减速 器制造更困难, 制造成本也较高, 而且在运行中啮合齿轮的运转会产生很 大的噪音, 从减速箱中漏油的现象也经常出现。  In the above-mentioned oil pumping workover rig, the motor transmits torque to the sky wheel through the reduction gear box, and drives the sky wheel to rotate, thereby completing the up and down reciprocating motion of the sucker rod, but if it is to satisfy the work of high torque and low speed, Therefore, the gear structure in the reducer is required to be complicated, for example, a multi-stage gear is required to achieve deceleration and increase torque. Due to the difficulty in manufacturing the transmission gears in the reducer, the complicated reducer is more difficult to manufacture and the manufacturing cost is higher, and the operation of the meshing gear during operation causes a large noise, and oil leakage from the reduction gearbox. It also appears frequently.
另外, 由于配重的质量通常有几吨重, 在安装、 维修过程中要利用电 机去牵引、 提升配重, 因此需要电机的输出功率很大, 而电机在进行正常 的抽油作业时, 通常只需要相对较小的输出功率, 因此, 造成了电机功率 的浪费。  In addition, since the weight of the counterweight usually has several tons of weight, it is necessary to use the motor to pull and lift the counterweight during installation and maintenance, so the output power of the motor is required to be large, and the motor usually performs normal pumping operations. Only a relatively small output power is required, thus causing a waste of motor power.
因此, 有必要开发一种新型抽油机, 克服以上不足之处。 发明内容 本发明的目的是提供一种结构简单、 运行噪音小、 无漏油问题、 所需 电机输出功率小且成本低廉的抽油机。 Therefore, it is necessary to develop a new type of pumping unit to overcome the above deficiencies. Summary of the invention The object of the present invention is to provide a pumping unit which has a simple structure, low running noise, no oil leakage problem, low required output power of the motor and low cost.
本发明公开的无齿传动抽油机包括主框架、 支架、 电机、 抽油杆、 悬绳器、 配重、 驱动轴、 驱动绳、 驱动轮、 第一皮带轮、 第二皮带轮和 皮带; 其中, 支架位于主框架顶部, 所述支架具有平台, 所述电机安装 在支架的平台上, 所述驱动轴安装在支架上, 所述驱动轮安装在所述驱 动轴上, 所述抽油杆和悬绳器通过绕过驱动轮的驱动绳与配重连接, 所 述电机的输出轴上安装有第一皮带轮, 所述驱动轴上安装有第二皮带 轮, 所述皮带连接所述第一皮带轮和第二皮带轮, 所述电机的额定输出 转矩大于或等于 G, G通过下式定义:  The toothless transmission pumping unit disclosed in the present invention comprises a main frame, a bracket, a motor, a sucker rod, a suspension rope, a counterweight, a drive shaft, a drive rope, a drive wheel, a first pulley, a second pulley and a belt; The bracket is located at the top of the main frame, the bracket has a platform, the motor is mounted on the platform of the bracket, the drive shaft is mounted on the bracket, the driving wheel is mounted on the driving shaft, the sucker rod and the suspension The rope is connected to the counterweight by a drive rope that bypasses the drive wheel, the first pulley is mounted on the output shaft of the motor, and the second pulley is mounted on the drive shaft, the belt is connected to the first pulley and the first pulley The second pulley, the rated output torque of the motor is greater than or equal to G, G is defined by:
G=PxD/ ( 2χΚ ) , 其中, Ρ为电机输出的牵引力, D为驱动轮直径, Κ 为第二皮带轮直径与第一皮带轮直径之比。 优选地, 其特征在于, Ρ 为 5880Ν至 29400Ν。 优选地, 所述电机为永磁同步电机。  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 pulley to the diameter of the first pulley. Preferably, it is characterized by Ρ 5880Ν to 29400Ν. Preferably, the motor is a permanent magnet synchronous motor.
优选地, 所述电机的转速大于或等于 η, η通过下式定义:  Preferably, the rotational speed of the motor is greater than or equal to η, and η is defined by:
n=2 L S K/ ( π ϋ ) , 其中, L为抽油杆沖程, S为抽油杆沖次, K 为 0-10, 而驱动轮直径 D为 0.3m-1.2m。  n=2 L S K/ ( π ϋ ) , where L is the stroke of the sucker rod, S is the stroke of the sucker rod, K is 0-10, and the diameter D of the drive wheel is 0.3m-1.2m.
优选地, 所述无齿传动抽油机还包括位置测量装置, 所述位置测量 装置包括计数盘和接近开关, 所述计数盘安装在驱动轴或电机的输出轴 上, 接收计数盘位置信号的所述接近开关与所述控制装置连接, , 所述 控制装置与电机连接, 向电机输出设定频率的电压, 并且根据所述位置 测量装置产生的信号使电机正、 反向转动。  Preferably, the gearless transmission pumping unit further comprises a position measuring device, wherein the position measuring device comprises a counting disc and a proximity switch, the counting disc is mounted on an output shaft of the driving shaft or the motor, and receives the signal of the counting disc position. The proximity switch is connected to the control device, and the control device is connected to the motor, outputs a voltage of a set frequency to the motor, and rotates the motor forward and reverse according to a signal generated by the position measuring device.
优选地, 所述无齿传动抽油机还包括位置测量装置, 所述位置测量 装置是光电编码器, 所述光电编码器安装在驱动轴或电机的输出轴上, 并与控制装置连接, 所述控制装置与电机连接, 向电机输出设定频率的 电压, 并且根据所述位置测量装置产生的信号使电机正、 反向转动。  Preferably, the toothless transmission pumping unit further comprises a position measuring device, wherein the position measuring device is a photoelectric encoder, and the photoelectric encoder is mounted on an output shaft of the driving shaft or the motor, and is connected to the control device. The control device is connected to the motor, outputs a voltage of a set frequency to the motor, and rotates the motor in the forward and reverse directions according to a signal generated by the position measuring device.
优选地, 所述无齿传动抽油机还包括保险绳, 所述保险绳的一端与 配重紧固连接、 另一端与驱动轮紧固连接。  Preferably, the toothless transmission pumping unit further comprises a safety rope, one end of which is fastened to the weight and the other end is fastened to the driving wheel.
优选地, 该抽油机框架底部设有调整顶丝和滚轮。  Preferably, the bottom of the pumping unit frame is provided with an adjusting top wire and a roller.
优选地, 所述无齿传动抽油机还包括用于保持配重竖直运动的导向 机构, 且所述导向机构安装在配重上, 所述配重沿着导向机构移动。 优选地, 该无齿传动抽油机还包括卷扬机, 所述卷扬机设置在支架 的平台上,卷扬机通过连接装置与配重连接。所述连接装置包括卷扬绳、 定滑轮、 动滑轮和卷扬绳固定器, 其中动滑轮与配重连接, 卷扬绳的一 端与卷扬机连接, 卷扬绳的另一端绕过定滑轮和动滑轮连接到卷扬绳固 定器上。 Preferably, the toothless transmission pumping unit further comprises a guide for maintaining vertical movement of the counterweight a mechanism, and the guiding mechanism is mounted on the counterweight, the counterweight moving along the guiding mechanism. Preferably, the toothless transmission pumping unit further comprises a hoisting machine, the hoisting machine is arranged on the platform of the bracket, and the hoisting machine is connected with the counterweight through the connecting device. The connecting device comprises a hoisting rope, a fixed pulley, a moving pulley and a hoisting rope holder, wherein the movable pulley is connected with the counterweight, one end of the hoisting rope is connected with the hoist, and the other end of the hoisting rope is connected to the fixed pulley and the movable pulley to On the hoisting rope holder.
优选地, 该无齿传动抽油机还包括导向装置, 所述导向装置安装在 支架的平台上, 所述驱动绳绕过导向装置。  Preferably, the toothless drive pumping unit further comprises a guiding device mounted on the platform of the bracket, the drive rope bypassing the guiding device.
本发明还提供了一种无齿传动抽油机, 包括支架、 电机、 抽油杆、 悬绳器、 配重、 驱动轴、 驱动绳、 驱动轮、 第一链轮、 第二链轮和链条; 所述电机安装在支架上, 所述驱动轴安装在支架上, 所述驱动轮安装在 所述驱动轴上, 所述抽油杆和悬绳器通过绕过驱动轮的驱动绳与配重连 接; 所述电机的输出轴上安装有第一链轮, 所述驱动轴上安装有第二链 轮, 所述链条连接所述第一链轮和第二链轮; 所述电机的额定输出转矩 大于或等于 G, G通过下式定义:  The invention also provides a toothless transmission pumping unit, comprising a bracket, a motor, a sucker rod, a suspension rope, a counterweight, a drive shaft, a drive rope, a drive wheel, a first sprocket, a second sprocket and a chain The motor is mounted on a bracket, the drive shaft is mounted on the bracket, the drive wheel is mounted on the drive shaft, and the sucker rod and the suspension rope pass the drive rope and the counterweight bypassing the drive wheel a first sprocket is mounted on the output shaft of the motor, and a second sprocket is mounted on the drive shaft, the chain connecting the first sprocket and the second sprocket; the rated output of the motor The torque is greater than or equal to G, and G is defined by:
G=PxD/ ( 2χΚ ), 其中, Ρ为电机输出的牵引力, D为驱动轮直径, Κ 为第二链轮直径与第一链轮直径之比。  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.
与现有技术相比, 由于本发明所述的抽油机采取了无齿轮变速箱的设 计, 大大降低了加工难度和制造成本。 由于采用皮带传动, 从而使传动噪 音明显减小,通常工作噪音小于 55db。 由于无齿轮箱结枸而解决了漏油问 题。 其简单的结构, 也使制造成本大大降低。  Compared with the prior art, since the pumping unit of the present invention adopts the design of the gearless transmission, the processing difficulty and the manufacturing cost are greatly reduced. Due to the belt drive, the transmission noise is significantly reduced, and the working noise is usually less than 55db. The problem of oil leakage was solved because there was no gearbox crusting. Its simple structure also greatly reduces manufacturing costs.
进一步地, 采用本发明的无齿传动抽油机, 只需要利低功率的电机和 简单的结构就能够实现低速、 大扭矩的输出。  Further, with the toothless transmission pumping unit of the present invention, low-speed, high-torque output can be realized with only a low-power motor and a simple structure.
而且, 当抽油机安装和维修时, 通过采用本发明的卷扬机提升配重, 与用主电机直接提升配重时相比, 可以明显降低主电机的功率。 该卷扬机 不仅能够提升配重, 在修井作业时还可以作为吊车使用。 附图说明  Moreover, when the pumping unit is installed and repaired, by using the hoist of the present invention to lift the counterweight, the power of the main motor can be significantly reduced as compared with when the counterweight is directly lifted by the main motor. The winch not only can increase the counterweight, but can also be used as a crane during workover operations. DRAWINGS
图 1是本发明第一实施方式的无齿传动抽油机的结构示意图; 图 2是图 1所示无齿传动抽油机的左视图; 1 is a schematic structural view of a toothless transmission pumping unit according to a first embodiment of the present invention; Figure 2 is a left side view of the toothless transmission pumping unit shown in Figure 1;
图 3是本发明第二实施方式的具有卷扬机的无齿传动抽油机的结构示 意图;  Figure 3 is a schematic view showing the structure of a toothless transmission pumping unit having a hoist according to a second embodiment of the present invention;
图 4是图 3所示无齿传动抽油机的左视图;  Figure 4 is a left side view of the toothless transmission pumping unit shown in Figure 3;
图 5是图 3所示无齿传动抽油机的俯视图。 具体实施方式  Figure 5 is a plan view of the toothless drive pumping unit of Figure 3. detailed description
下面结合附图进一步说明本发明所提供的无齿传动抽油机, 但本发 明并不因此而受到任何限制。  The toothless transmission pumping unit provided by the present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited thereby.
如图 1、 图 2所示, 该抽油 f几包括抽油机构、 配重 4、 安装在支架 17上的驱动轴 18、 安装在所述驱动轴 18上的驱动轮 19、 电控拒 1、 电 机 8、 第一皮带轮 9、 皮带 11、 第二皮带轮 12, 所述抽油机构和配重通 过绕过驱动轮的驱动绳 16连接。 其中, 抽油机构包括抽油杆 13、 悬绳 器 14。 所述抽油机还包括: 与电机 8连接并向电机输出设定频率及电压 的电控拒 1, 该电控拒 1作为控制电机的控制装置。 所述电机 8的输出 轴上具有第一皮带轮 9,所述第一皮带轮 9通过皮带 11与安装在驱动轴 上的第二皮带轮 12连接, 使电机输出轴的转矩传输到所述驱动轴 18。  As shown in FIG. 1 and FIG. 2, the pumping unit f includes a pumping mechanism, a counterweight 4, a drive shaft 18 mounted on the bracket 17, a drive wheel 19 mounted on the drive shaft 18, and an electric control rejection 1 The motor 8, the first pulley 9, the belt 11, and the second pulley 12, the pumping mechanism and the counterweight are connected by a drive rope 16 that bypasses the drive wheel. The pumping mechanism includes a sucker rod 13 and a suspension rope 14. The pumping unit further includes: an electric control circuit 1 connected to the motor 8 and outputting a set frequency and voltage to the motor, and the electronic control rejection 1 is used as a control device for controlling the motor. The output shaft of the motor 8 has a first pulley 9 connected to a second pulley 12 mounted on the drive shaft via a belt 11 to transmit torque of the motor output shaft to the drive shaft 18 .
在电控拒 1 中设置有变频器、 可编程控制器 (PLC ) 、 制动单元、 显示单元等电器件。 变频器是将电压和频率固定不变的交流电变换为电 压或频率可变的交流电的装置。 用于电机控制的变频器, 既可以改变电 压, 也可以改变频率。 变频器的输出端与电机 8连接, 使电机 8在一定 的频率、 电压下工作。 PLC以及其他的工业计算机(如单片机等)可以 实现对变频器的进一步控制。 显示单元为用户提供可以进行人机交互的 界面。  In the electronic control rejection 1, an inverter, a programmable controller (PLC), a brake unit, a display unit, and the like are provided. A frequency converter is a device that converts alternating current with constant voltage and frequency into alternating voltage of voltage or frequency. A frequency converter for motor control that changes both voltage and frequency. The output of the inverter is connected to the motor 8 to operate the motor 8 at a certain frequency and voltage. PLCs and other industrial computers (such as microcontrollers) can achieve further control of the frequency converter. The display unit provides the user with an interface for human-computer interaction.
电机 8可以选用所有能够满足抽油机工况的电机。 对于电机参数的 选择, 电机的额定输出转矩应大于或等于 G, G=PxD/ ( 2xK ) , 其中, P为电机输出的牵引力, D为驱动轮直径, K为第二皮带轮直径与第一 皮带轮直径之比。 其中, 牵引力 P等于抽油杆 13与配重 4平衡后的重 力之差, 还包括抽油作业中所产生的阻力。 牵引力 P根据油井深度和井 况的不同而不同。 在本实施例的抽油机设计时, 电机输出的牵引力 P为 5880N至 29400N。 同时, 所述电机的转速等于 n, n=2xLxS K/ ( πχϋ ) , 其中, L为抽油杆沖程, S为抽油杆冲次。 在无齿传动抽油机的设计中, K优选为 0-10, 而驱动轮直径 D优选为 0.3m-1.2m。 设抽油杆沖程为 5 米,沖次为 4次,取 P= 10000N、 D= 1 m、 K=5,则根据上述公式, G= 1 OOONm, n 64rpm, 即电机的额定输出转矩应该大于 lOOONm, 电机的额定输出转 速应大于 64rpm。 因此, 本实施例选用额定输出转矩 1200Nm、 额定转 速 85rpm的永磁同步电机。 The motor 8 can be used with all motors that can meet the pumping conditions. For the selection of motor parameters, the rated output torque of the motor should be greater than or equal to G, G = PxD / ( 2xK ), where P is the traction of the motor output, D is the diameter of the drive wheel, and K is the diameter of the second pulley and the first The ratio of the diameter of the pulley. Wherein, the traction force P is equal to the difference between the gravity of the balance between the sucker rod 13 and the counterweight 4, and also includes the resistance generated during the pumping operation. Traction P according to well depth and well The situation is different. In the design of the pumping unit of the present embodiment, the traction force P of the motor output is 5880N to 29400N. Meanwhile, the rotational speed of the motor is equal to n, n=2xLxS K/( πχϋ ), where L is the stroke of the sucker rod and S is the stroke of the sucker rod. In the design of the toothless drive pumping unit, K is preferably 0-10, and the drive wheel diameter D is preferably 0.3m-1.2m. Set the stroke of the sucker rod to 5 meters and the stroke to 4 times. Take P= 10000N, D= 1 m, K=5. According to the above formula, G= 1 OOONm, n 64rpm, that is, the rated output torque of the motor should be Above 1000Om, the rated output speed of the motor should be greater than 64 rpm. Therefore, in this embodiment, a permanent magnet synchronous motor with a rated output torque of 1200 Nm and a rated rotational speed of 85 rpm is selected.
在本发明的无齿传动抽油机优选永磁同步电机并且选用输出转矩 300Nm以上、 输出功率 5-45Kw、 转速在 500rpm以下的永磁同步电机。 具体在本实施例中, 采用额定输出转矩 800Nm、 额定输出功率 8kw, 额 定转速 85rpm的永磁同步电机。 在本发明无齿传动抽油机的设计中, 永 磁同步电机要满足大转矩、 低转速的工作要求, 不仅有利于节约能源, 更能避免高转速电机工作时产生的噪音, 进一步降低了抽油机整体的工 作噪音。  In the toothless transmission pumping unit of the present invention, a permanent magnet synchronous motor is preferably used, and a permanent magnet synchronous motor having an output torque of 300 Nm or more, an output of 5-45 Kw, and a rotation speed of 500 rpm or less is selected. Specifically, in the present embodiment, a permanent magnet synchronous motor having a rated output torque of 800 Nm, a rated output of 8 kw, and a rated rotational speed of 85 rpm is used. In the design of the toothless transmission pumping unit of the present invention, the permanent magnet synchronous motor has to meet the requirements of high torque and low speed, which not only saves energy, but also avoids noise generated when the high speed motor works, further reducing the noise. The overall working noise of the pumping unit.
电机 8安装在支架 17的平台上,电机 8的输出轴上同轴安装有第一 皮带轮 9, 如图 1所示, 第一皮带轮 9的直径较小。 抽油机的驱动轴 18 也通过轴承 21安装在支架 17的平台上, 在驱动轴 18上同轴安装有第 二皮带轮 12, 第二皮带轮 12具有比第一皮带轮 9更大的直径。 第一皮 带轮 9和第二皮带轮 12上通过皮带 11相连。 由于第二皮带轮 12固定 在驱动轴 18上 (例如通过过盈配合或键联接) , 皮带 1 1可以将电机 8 的输出转矩和转速传递到驱动轴 18。 例如, 当第二皮带轮 12的直径为 第一皮带轮 9直径的 2倍时,则输出到第二皮带轮 12上的转矩为电机 8 输出转矩的两倍, 而输出到第二皮带轮 12上的转速为电机 8输出转速 的二分之一。  The motor 8 is mounted on the platform of the bracket 17, and the first pulley 9 is coaxially mounted on the output shaft of the motor 8, as shown in Fig. 1, the diameter of the first pulley 9 is small. The drive shaft 18 of the pumping unit is also mounted on the platform of the bracket 17 via a bearing 21, and a second pulley 12 is coaxially mounted on the drive shaft 18, the second pulley 12 having a larger diameter than the first pulley 9. The first pulley 9 and the second pulley 12 are connected by a belt 11. Since the second pulley 12 is fixed to the drive shaft 18 (e.g., by an interference fit or a keyed connection), the belt 1 1 can transmit the output torque and rotational speed of the motor 8 to the drive shaft 18. For example, when the diameter of the second pulley 12 is twice the diameter of the first pulley 9, the torque output to the second pulley 12 is twice the output torque of the motor 8, and is output to the second pulley 12. The rotational speed is one-half of the output speed of the motor 8.
在图 1 中, 抽油机采用一级皮带传动的方式, 可以理解, 本发明可 以采取多种皮带传动方式, 例如采用多级皮带的传动方式, 优选地可采 用两级皮带的传动方式。 并且, 为了使输出转矩增大, 主动皮带轮的直 径要小于从动皮带轮的直径。 而且, 为了带动更大的载荷, 皮带可以为 并行安装的多根, 例如可以在第一皮带轮 9和第二皮带轮 12之间安装 6-8根皮带。 皮带 1 1可以采用各种适合的皮带, 如三角带、 齿形带等, 优选地, 为了延长皮带 1 1传输的寿命, 皮带 1 1选用三角带。 In Fig. 1, the pumping unit adopts a first-stage belt transmission. It can be understood that the present invention can adopt various belt transmission modes, for example, a transmission method using a multi-stage belt, and preferably a two-stage belt transmission method. Also, in order to increase the output torque, the diameter of the driving pulley is smaller than the diameter of the driven pulley. Moreover, in order to drive a larger load, the belt may be installed in parallel, for example, between the first pulley 9 and the second pulley 12 6-8 belts. The belt 1 1 can be of various suitable belts, such as a V-belt, a toothed belt, etc. Preferably, in order to extend the life of the belt 11 transport, the belt 11 is a V-belt.
驱动轴 18获得转矩和转速后, 会在电机 8的带动下转动。 驱动轴上 还固定有驱动轮 19, 在驱动轮 19的圆周上设有容纳驱动绳 16的槽, 从 而驱动绳 16可以很方便地绕过驱动轮 19。所述驱动绳 16的一端连接悬 绳器 14, 悬绳器 14连接抽油杆 13 , 驱动绳 16的另一端与配重 4连接。 设置配重 4是为了平衡抽油杆 13产生的转矩。 这样, 随着驱动轮 19的 转动, 抽油杆 13可以沿竖直方向上下运动。  After the drive shaft 18 obtains the torque and the rotational speed, it will rotate under the driving of the motor 8. A drive wheel 19 is also fixed to the drive shaft, and a groove for accommodating the drive rope 16 is provided on the circumference of the drive wheel 19, so that the drive rope 16 can easily bypass the drive wheel 19. One end of the drive rope 16 is connected to the suspension rod 14, and the suspension rope 14 is connected to the sucker rod 13, and the other end of the drive rope 16 is connected to the weight 4. The counterweight 4 is set to balance the torque generated by the sucker rod 13. Thus, as the drive wheel 19 rotates, the sucker rod 13 can move up and down in the vertical direction.
当抽油杆 13到达油井的预定深度完成采油后, 需要将抽油杆 13提 起, 因此需要实现驱动轮 19的反向转动, 即需要电机 8的反向转动。 在本实施例中, 采用计数盘 22和接近开关 20作为位置测量装置以控制 电机 8的反向转动。 如图 2所示, 计数盘 22同轴固定在驱动轴 18上, 在支架 17 的平台上且与计数盘之间留有较小间隙的地方设有接近开关 20, 该接近开关 20为磁力开关。 在抽油杆 13的工作行程中, 接近开关 20对驱动轴 18的转数进行计数, 当达到预定转数时, 接近开关 20向电 控柜 1发出信号, 使 PLC通过变频器让电机 8反转。  When the sucker rod 13 reaches the predetermined depth of the oil well to complete the oil recovery, the sucker rod 13 needs to be lifted, so that the reverse rotation of the drive wheel 19 is required, that is, the reverse rotation of the motor 8 is required. In the present embodiment, the counter disk 22 and the proximity switch 20 are employed as position measuring means for controlling the reverse rotation of the motor 8. As shown in FIG. 2, the counter disk 22 is coaxially fixed to the drive shaft 18, and a proximity switch 20 is provided on the platform of the bracket 17 and a small gap is left between the counter disk, and the proximity switch 20 is a magnetic switch. . During the working stroke of the sucker rod 13, the proximity switch 20 counts the number of revolutions of the drive shaft 18. When the predetermined number of revolutions is reached, the proximity switch 20 sends a signal to the electric control cabinet 1 to cause the PLC to reverse the motor 8 through the frequency converter. turn.
上述计数盘 22和接近开关 20组成的位置测量装置可以设置在支架 17的平台和驱动轴 18上, 也可以设置在传动机构的其他部分, 例如, 可设置在电机 8 的输出轴上。 而位置测量装置也不限于上述的计数盘 / 接近开关,其他适合的位置测量装置都可以采用,例如光电编码器等等。  The position measuring device composed of the above counter disk 22 and the proximity switch 20 may be disposed on the platform of the bracket 17 and the drive shaft 18, or may be disposed in other portions of the transmission mechanism, for example, on the output shaft of the motor 8. The position measuring device is not limited to the counting disc/proximity switch described above, and other suitable position measuring devices may be employed, such as a photoelectric encoder or the like.
为了抽油机的运行安全, 在本实施例中还设有保险绳 15。 所述保险 绳 15的一端固定在驱动轮 19上, 保险绳 15的另一端绕过驱动轮 18紧 固在配重 4上。 当抽油杆 13断开时, 配重 4下坠, 配重 4带动保险绳 15使驱动轮 19高速转动, 从而使电机 8产生过载, 此时在电控拒 1的 作用下, 电机 8的制动器 10刹车, 保险绳 15拉紧配重, 从而使配重不 能自由落下, 可以避免发生撞击事故。  For the safe operation of the pumping unit, a safety cord 15 is also provided in this embodiment. One end of the safety cord 15 is fixed to the drive wheel 19, and the other end of the safety rope 15 is fastened to the counterweight 4 around the drive wheel 18. When the sucker rod 13 is disconnected, the counterweight 4 is lowered, and the counterweight 4 drives the safety rope 15 to rotate the drive wheel 19 at a high speed, thereby causing the motor 8 to be overloaded. At this time, under the action of the electric control rejection 1, the brake of the motor 8 10 brakes, the safety rope 15 tightens the weight, so that the weight can not fall freely, can avoid collision accidents.
安装抽油机时, 通过电机 8带动保险绳 15提升配重, 同时悬绳器 14下降, 从而可以将抽油杆 13与悬绳器 14连接。 当抽油机不抽油时, 保险绳 15可以从配重上解下, 作为空间小吊车的吊绳使用。 在本实施例中, 在配重 4上设有作为导向机构的导向轮 5 , 导向绳 6 夹在导向轮 5之间, 使得在配重 4上下运动过程中, 运动方向始终保持 竖直。 When the pumping unit is installed, the weight is lifted by the motor 8 to lift the weight, and the suspension 14 is lowered, so that the sucker rod 13 can be connected to the suspension 14. When the pumping unit does not pump oil, the safety line 15 can be removed from the counterweight and used as a sling for the space small crane. In the present embodiment, a guide wheel 5 as a guide mechanism is provided on the counterweight 4, and the guide rope 6 is sandwiched between the guide wheels 5 so that the movement direction is always vertical during the vertical movement of the counterweight 4.
此外, 为了使抽油机框架底部与水平面平行, 在框架 7的底部设有可 调的顶丝 3, 以调节整个框架水平。 为了方便地移动抽油机, 在框架 7的 底部还设有滚轮 2。  Further, in order to make the bottom of the pumping unit frame parallel to the horizontal plane, an adjustable top wire 3 is provided at the bottom of the frame 7 to adjust the entire frame level. In order to move the pumping unit conveniently, a roller 2 is also provided at the bottom of the frame 7.
这里还提供了本发明的另一种实现形式。 在该抽油机中, 包括抽油 机构、 电机、 配重、 安装在支架上的驱动轴、 安装在所述驱动轴上的驱 动轮、 第一链轮和第二链轮, 所述抽油机构和配重通过绕过驱动轮的驱 动绳连接。 其中, 所述抽油机构包括: 抽油杆、 悬绳器。 所述抽油机还 包括: 与电机连接并向电机输出设定频率的电压的控制拒、 所述控制拒 作为控制装置。 所述电机的输出轴上设有第一链轮, 在驱动轴上安装有 第二链轮。  Another form of implementation of the invention is also provided herein. In the pumping unit, including a pumping mechanism, a motor, a counterweight, a drive shaft mounted on the bracket, a drive wheel mounted on the drive shaft, a first sprocket and a second sprocket, the pumping The mechanism and counterweight are connected by a drive rope that bypasses the drive wheel. Wherein, the oil pumping mechanism comprises: a sucker rod and a suspension rope. The pumping unit further includes: a control reject connected to the motor and outputting a voltage of a set frequency to the motor, the control being rejected as a control device. A first sprocket is disposed on the output shaft of the motor, and a second sprocket is mounted on the drive shaft.
所述控制装置仍可采用电控拒的形式, 在电控拒中设置有变频器、 可编程控制器 (PLC ) 、 制动单元、 显示器等电子器件。 变频器的输出 端与电机连接, 使电机在一定的频率、 电压下工作。 PLC可以实现对变 频器的进一步控制。  The control device can still adopt the form of electronic control rejection, and an electronic device such as a frequency converter, a programmable controller (PLC), a brake unit, and a display is disposed in the electronic control rejection. The output of the inverter is connected to the motor to operate the motor at a certain frequency and voltage. The PLC can achieve further control of the frequency converter.
在本实施例中, 电机采用大扭矩永磁同步电机, 该大扭矩永磁同步 电机仍由电控拒中的变频器调速。 同样地, 对于电机参数的选择, 具体 地, 电机的额定输出转矩应大于或等于 G, G=PxD/ ( 2χΚ ) , 其中, Ρ 为电机输出的牵引力, D为驱动轮直径, Κ为第二链轮直径与第一链轮 直径之比。 其中, 牵引力 Ρ等于抽油杆与配重平衡后的重力之差, 还包 括抽油作业中的阻力。 牵引力 Ρ根据油井深度和井况的不同而不同。 在 本实施例的抽油机设计时, 电机输出的牵引力 Ρ为 5880Ν至 29400Ν。 同时, 电机的转速大于或等于 n, n=2xLxS K ( πχΌ ) , 其中, L为抽 油杆冲程, S为抽油杆沖次。 在无齿传动抽油机设计中, Κ优选为 0-10, 而驱动轮直径 D优选为 0.3m-1.2m。 更优选地, 本实施例选用额定输出 转矩 1300Nm、 额定输出功率 20kw, 额定转速 200rpm的大扭矩永磁同 步电机。 电机安装在支架的平台上, 电机输出轴上同轴安装有第一链轮, 第 一链轮的直径较小。 抽油机的驱动轴也安装在支架的平台上, 在驱动轴 上同轴安装有第二链轮, 第二链轮具有比第一链轮更大的直径。 第一链 轮和第二链轮上通过链条相连。 由于第二链轮固定在驱动轴上 (例如通 过过盈配合或键联接) , 链条可以将电机的输出转矩和转速传递到驱动 轴。 通过链条传动, 可以承受比皮带更大的载荷。 当第二链轮的直径为 第一链轮的两倍时, 则输出到第二链轮上的转矩为电机输出转矩的两 倍, 而输出到第二链轮上的转速为电机输出转速的二分之一。 In this embodiment, the motor uses a high-torque permanent magnet synchronous motor, and the high-torque permanent magnet synchronous motor is still regulated by an inverter that is electrically rejected. Similarly, for the selection of the motor parameters, specifically, the rated output torque of the motor should be greater than or equal to G, G = PxD / ( 2 χΚ ), where Ρ is the traction of the motor output, D is the diameter of the drive wheel, Κ is the first The ratio of the diameter of the two sprocket to the diameter of the first sprocket. Among them, the traction force Ρ is equal to the difference between the gravity of the sucker rod and the counterweight balance, and also includes the resistance in the pumping operation. Traction Ρ varies depending on the depth of the well and the well condition. In the design of the pumping unit of the present embodiment, the traction force of the motor output is 5880 Ν to 29400 Ν. At the same time, the speed of the motor is greater than or equal to n, n = 2xLxS K ( π χΌ ), where L is the stroke of the sucker rod and S is the stroke of the sucker rod. In the design of the gearless pumping unit, Κ is preferably 0-10, and the drive wheel diameter D is preferably 0.3m-1.2m. More preferably, in this embodiment, a high-torque permanent magnet synchronous motor with a rated output torque of 1300 Nm, a rated output power of 20 kw, and a rated rotational speed of 200 rpm is selected. The motor is mounted on the platform of the bracket, and the first sprocket is coaxially mounted on the output shaft of the motor, and the diameter of the first sprocket is small. The drive shaft of the pumping unit is also mounted on the platform of the bracket, and a second sprocket is coaxially mounted on the drive shaft, the second sprocket having a larger diameter than the first sprocket. The first sprocket and the second sprocket are connected by a chain. Since the second sprocket is fixed to the drive shaft (for example by an interference fit or a keyed connection), the chain can transmit the output torque and speed of the motor to the drive shaft. Through the chain drive, it can withstand a larger load than the belt. When the diameter of the second sprocket is twice that of the first sprocket, the torque output to the second sprocket is twice the output torque of the motor, and the rotational speed output to the second sprocket is the motor output. One-half of the speed.
驱动轴在获得转矩和转速后, 会在电机的带动下转动。 驱动轴上固 定有驱动轮, 在驱动轮的圆周上具有容纳驱动绳的槽, 由此, 驱动绳绕 过驱动轮, 所述驱动绳的一端连接悬绳器, 悬绳器连接抽油杆; 驱动绳 的另一端与配重连接。 随着驱动轮的转动, 抽油杆可以在竖直方向上上 下运动。  After the torque and speed are obtained, the drive shaft will rotate under the driving of the motor. a drive wheel is fixed on the drive shaft, and a groove for accommodating the drive rope is arranged on the circumference of the drive wheel, whereby the drive rope bypasses the drive wheel, one end of the drive rope is connected to the suspension rope, and the suspension rope is connected to the sucker rod; The other end of the drive cord is connected to the counterweight. As the drive wheel rotates, the sucker rod can move up and down in the vertical direction.
当抽油杆到达油井的预定深度完成采油后, 需要将抽油杆提起, 因 此电机需在预定时刻反向转动。 在本实施例中采用光电编码器作为位置 测量装置, 所述光电编码器可以设置在电机输出轴上。 光电编码器的工 作原理为本领域技术人员所公知, 在此不再赘述。  When the sucker rod reaches the predetermined depth of the well to complete the oil recovery, the sucker rod needs to be lifted, so the motor needs to rotate in the opposite direction at the predetermined time. In the present embodiment, a photoelectric encoder is employed as the position measuring device, and the photoelectric encoder can be disposed on the motor output shaft. The working principle of the photoelectric encoder is well known to those skilled in the art and will not be described herein.
图 3是本发明第二实施方式的一种具有卷扬机的无齿传动抽油机的 结构示意图, 图 4、 图 5分别是该无齿传动抽油机的左视图和俯视图。  3 is a schematic structural view of a toothless transmission pumping unit having a hoist according to a second embodiment of the present invention, and FIGS. 4 and 5 are respectively a left side view and a top view of the toothless transmission pumping unit.
本发明第二实施方式提供的抽油机包括主框架 301、 支架 308、 电机 310、 制动器 31 1、 控制装置 309、 抽油杆 304、 悬绳器 321、 配重 314、 驱动轴 330、 驱动绳 318、 驱动轮 329、 卷扬机 328和卷扬绳 320以及传 动装置。 其中, 主框架 301顶部具有支架 308 , 支架 308具有平台, 所 述驱动轴 330安装在支架 308上,所述驱动轮 329安装在所述驱动轴 330 上, 所述抽油杆 304和悬绳器 321通过绕过驱动轮 329的驱动绳 318与 配重 314连接。  The pumping unit according to the second embodiment of the present invention includes a main frame 301, a bracket 308, a motor 310, a brake 31 1 , a control device 309, a sucker rod 304, a suspension 321, a weight 314, a drive shaft 330, and a drive rope. 318. Drive wheel 329, winch 328 and hoisting rope 320, and transmission. Wherein, the top of the main frame 301 has a bracket 308, the bracket 308 has a platform, the driving shaft 330 is mounted on the bracket 308, the driving wheel 329 is mounted on the driving shaft 330, the sucker rod 304 and the suspension rope The 321 is coupled to the weight 314 by a drive cord 318 that bypasses the drive wheel 329.
在第二实施方式中所述控制装置可以采用电控拒 309的形式,通常在 电控拒 309 中设置有变频器、 可编程控制器(PLC )、 制动单元、 显示单 元等电子器件。 变频器是将电压和频率固定不变的交流电变换为电压或频 率可变的交流电的装置。 用于电机控制的变频器, 既可以改变电压, 也可 以改变频率。变频器的输出端与电机 310连接,使电机 310在一定的频率、 电压下工作。 PLC以及其他的工业计算机(如单片机等)可以实现对变频 器的进一步控制。 显示单元为用户提供可以进行人机交互的界面。 在本实 施例中,通过连接到电控拒 309的电控操纵盘 303实现对抽油机的人工控 制, 所述电控操纵盘 303位于操作人员便于操控的位置, 例如位于防盗门 302上。 In the second embodiment, the control device may take the form of an electronically controlled rejection 309. Generally, the electronic control device 309 is provided with an electronic device such as a frequency converter, a programmable controller (PLC), a braking unit, and a display unit. The inverter converts alternating current with constant voltage and frequency into voltage or frequency. A device with a variable rate of alternating current. A frequency converter for motor control that changes both voltage and frequency. The output of the frequency converter is connected to the motor 310 to operate the motor 310 at a certain frequency and voltage. PLCs and other industrial computers (such as microcontrollers) can achieve further control of the frequency converter. The display unit provides the user with an interface that can perform human-computer interaction. In the present embodiment, manual control of the pumping unit is achieved by an electronically controlled dial 303 connected to the electronically controlled reject 309, which is located at a position convenient for the operator to operate, such as on the security door 302.
所述电机 310安装在支架 308的平台上, 电机 310上安装有制动器 31 1 , 所述制动器 31 1在电控拒 309的控制下使电机停转。 电机 310只 用于在抽油过程中提供转矩和功率, 而不负责配重 314的单独提升, 因 此电机 310的转矩、 功率等参数只需要满足能够带动抽油杆 304运动的 要求。 当抽油机抽油时, 电机 310在电控拒 309的控制下有规律的正、 反 向转动, 通过传动装置, 绕在驱动轮 329上的驱动绳 318带动配重 314 和抽油杆 304上、下往复运动,从而使抽油扞 304带动抽油泵抽取油液。  The motor 310 is mounted on a platform of a bracket 308, and a brake 31 1 is mounted on the motor 310, and the brake 31 1 stops the motor under the control of the electronically controlled 309. The motor 310 is only used to provide torque and power during the pumping process, and is not responsible for the individual lifting of the weight 314. Therefore, the torque, power and other parameters of the motor 310 need only meet the requirements of driving the sucker rod 304. When the pumping unit draws oil, the motor 310 rotates regularly in the normal direction and the reverse direction under the control of the electric control 309. Through the transmission device, the driving rope 318 wound on the driving wheel 329 drives the weight 314 and the sucker rod 304. The upper and lower reciprocating movements cause the pumping crucible 304 to drive the oil pump to extract the oil.
在抽油机的安装或维修期间, 如果需要对配重 314进行提升吊装, 则通过卷扬机 328来完成。 如图 3所示, 卷扬机 328也安装在支架 38 的平台上。 卷扬机 328可以直接通过卷扬绳 320牵引配重 314, 也可以 通过其他的连接装置来牵引配重 314, 例如在本实施例中, 通过滑轮组 牵引配重 314牵引配重可以节省牵引力。 如图 3所示, 卷扬绳 320的一 端连接在卷扬机 328的输出端, 卷扬绳 320绕过定滑轮 326, 再绕过动 滑轮 319后, 另一端固定在卷扬绳固定器 325上。 当抽油机安装或维修 时, 将动滑轮 319上的钩子挂到配重 314上, 通过操纵电控操纵盘 33 , 使 卷扬机 328启动, 从而可以提升配重 314。 与用电机 310直接提升配重箱 314的方式相比, 使用卷扬机 328提升配重 314可以大大降低电机 310 的使用功率。而且卷扬机 328不仅能提升配重,在修井时也可以当吊车。  During the installation or maintenance of the pumping unit, if the counterweight 314 needs to be lifted and hoisted, it is completed by the hoist 328. As shown in Figure 3, the hoist 328 is also mounted on the platform of the bracket 38. The hoist 328 can draw the counterweight 314 directly through the hoisting rope 320, or it can be towed by other attachment means. For example, in the present embodiment, traction can be saved by pulling the counterweight 314 through the pulley assembly. As shown in Fig. 3, one end of the hoisting rope 320 is connected to the output end of the hoisting machine 328. The hoisting rope 320 bypasses the fixed pulley 326, and then passes around the movable pulley 319, and the other end is fixed to the hoisting rope holder 325. When the pumping unit is installed or repaired, the hook on the movable pulley 319 is hung on the weight 314, and the hoisting machine 328 is activated by operating the electronic control panel 33, so that the weight 314 can be raised. Using the winch 328 to lift the counterweight 314 can greatly reduce the power used by the motor 310 as compared to the manner in which the motor 310 directly lifts the weight box 314. Moreover, the winch 328 can not only increase the counterweight, but also can be used as a crane during workover.
在本实施例中, 在支架 308的平台上还安装有导向装置, 所述导向 装置包括: 导向轮 334、 导向轮轴 335、 导向轮架 306、 支撑铰链轴 332和 导向轮轴承 336。 导向轮架 306通过支撑铰链轴 332固定在支架 308的平台 上。 导向轮 334固定在导向轮轴 335上, 而导向轮轴 335通过导向轮轴 承 336安装在导向轮架 306上。驱动绳 318的一端连接配重 314, 而另一 端绕过驱动轮 329后跨过导向轮 334的轮周与悬绳器 321相连, 悬绳器 321与抽油杆 304相连。 导向装置的设置使抽油机和油井之间保持了一 段距离, 因此通过收起导向装置和抽油机构(例如通过绕支撑铰链轴 332 旋转导向轮架 306 ), 可以为油井维修留出足够的维修作业空间, 而无需 整体移动抽油机。 在另外的实施例中, 可以不设置上述导向装置, 驱动 绳 318仅绕过驱动轮 329分别连接抽油机构和配重 314, 这些实施例仍 适用于本发明的抽油机。 In the present embodiment, a guide device is further mounted on the platform of the bracket 308, and the guide device includes: a guide wheel 334, a guide wheel shaft 335, a guide wheel frame 306, a support hinge shaft 332, and a guide wheel bearing 336. The guide wheel carrier 306 is secured to the platform of the bracket 308 by a support hinge shaft 332. The guide wheel 334 is fixed to the guide wheel axle 335, and the guide wheel axle 335 is guided by the guide axle The carrier 336 is mounted on the guide wheel carrier 306. One end of the drive cord 318 is connected to the weight 314, and the other end is connected to the suspension rod 321 across the circumference of the guide wheel 334 after bypassing the drive wheel 329. The suspension 321 is connected to the sucker rod 304. The arrangement of the guides maintains a distance between the pumping unit and the well, so by retracting the guide and the pumping mechanism (for example by rotating the guide wheel frame 306 about the support hinge shaft 332), sufficient maintenance can be provided for the well repair. Repair the work space without the need to move the pump unit as a whole. In other embodiments, the above-described guiding means may not be provided, and the driving rope 318 is only connected to the pumping mechanism and the weight 314 by bypassing the driving wheel 329, and these embodiments are still applicable to the pumping unit of the present invention.
在配重 314和驱动轮 329之间连接有保险绳 316。 保险绳 316的一 端固定在驱动轮 329上, 另一端连接在配重 314上, 当抽油杆 304断开 时, 配重 314下坠, 配重 314带动保险绳 316使驱动轮 329高速转动, 从而电机 310产生过载, 此时在电控柜 309的作用下, 电机 310的制动 器 31 1刹车, 保险绳 316拉紧配重 314, 使配重 314不能自由落下, 从 而可以避免产生撞击事故。  A safety line 316 is coupled between the weight 314 and the drive wheel 329. One end of the safety line 316 is fixed on the driving wheel 329, and the other end is connected to the weight 314. When the sucker rod 304 is disconnected, the weight 314 is lowered, and the weight 314 drives the safety line 316 to rotate the driving wheel 329 at a high speed. The motor 310 generates an overload. At this time, under the action of the electric control cabinet 309, the brake 31 1 of the motor 310 brakes, and the safety line 316 tightens the weight 314, so that the weight 314 cannot be freely dropped, thereby avoiding a collision accident.
在本实施方式中的传动装置通过皮带传动装置实现。皮带传动装置包 括第一皮带轮 322、 第二皮带轮 324、 皮带 323。 其中, 电机 310的输出轴 上同轴安装有第一皮带轮 322,如图 3所示, 第一皮带轮 322的直径较小。 抽油机的驱动轴 330通过轴承 331安装在支架 308上,在驱动轴 330上同 轴安装有第二皮带轮 324和驱动轮 329, 第二皮带轮 324具有比第一皮带 轮 322更大的直径。第一皮带轮 322和第二皮带轮 324通过皮带 323相连。 由于第二皮带轮 324固定在驱动轴 330上(例如通过过盈配合或键联接), 皮带 323可以将电机 310的输出转矩和转速传递到驱动轴 330。 例如, 当 第二皮带轮 324的直径为第一皮带轮 322直径的 2倍时, 则输出到第二皮 带轮 324上的转矩为电机 310输出转矩的两倍, 而输出到第二皮带轮 324 上的转速为电机 310输出转速的二分之一。  The transmission in the present embodiment is realized by a belt transmission. The belt drive includes a first pulley 322, a second pulley 324, and a belt 323. The first pulley 322 is coaxially mounted on the output shaft of the motor 310. As shown in FIG. 3, the diameter of the first pulley 322 is small. The drive shaft 330 of the pumping unit is mounted on the bracket 308 via a bearing 331 on which the second pulley 324 and the drive wheel 329 are mounted, and the second pulley 324 has a larger diameter than the first pulley 322. The first pulley 322 and the second pulley 324 are connected by a belt 323. Since the second pulley 324 is fixed to the drive shaft 330 (e.g., by an interference fit or a keyed coupling), the belt 323 can transmit the output torque and rotational speed of the motor 310 to the drive shaft 330. For example, when the diameter of the second pulley 324 is twice the diameter of the first pulley 322, the torque output to the second pulley 324 is twice the output torque of the motor 310, and is output to the second pulley 324. The rotational speed is one-half of the output speed of the motor 310.
在本实施方式中, 抽油机采用一级皮带传动的方式, 可以理解, 本发 明可以采取多种皮带传动方式, 例如采用多级皮带的传动方式, 例如可采 用两级皮带的传动方式。 并且, 为了使输出转矩增大, 主动皮带轮的直径 要小于从动皮带轮的直径。 而且, 为了带动更大的载荷, 皮带可以为并行 安装的多根, 例如可以在第一皮带轮 322和第二皮带轮 324之间安装 6-8 根皮带。 皮带 323可以采用各种适合的皮带, 如三角带、 齿形带等, 为了 延长皮带 323传输的寿命, 皮带 323选用三角带。 In the present embodiment, the pumping unit adopts a first-stage belt transmission mode. It can be understood that the present invention can adopt various belt transmission modes, for example, a multi-stage belt transmission method, for example, a two-stage belt transmission mode can be adopted. Also, in order to increase the output torque, the diameter of the driving pulley is smaller than the diameter of the driven pulley. Moreover, in order to drive a larger load, the belt can be in parallel A plurality of installed, for example, 6-8 belts can be installed between the first pulley 322 and the second pulley 324. The belt 323 can be of various suitable belts, such as a V-belt, a toothed belt, etc. In order to extend the life of the belt 323, the belt 323 is a V-belt.
在采用上述皮带传动装置的情况下, 电机 310可以选用所有能够满 足抽油机工况的电机。 对于电机参数的选择, 具体地, 电机的额定输出 转矩应大于或等于 G, G=PxD/ ( 2χΚ ) , 其中, Ρ为电机输出的牵引力, D为驱动轮直径, Κ为第二皮带轮直径与第一皮带轮直径之比。 其中, 牵引力 Ρ等于抽油杆 304与配重 3 14平衡后的重力之差, 还包括抽油作 业中所产生的阻力。 牵引力 Ρ根据油井深度和井况的不同而不同。 在本 实施例的抽油机设计时, 电机输出的牵引力 Ρ为 3000Ν至 50000Ν。 同 时, 所述电机 310的转速最好大于或等于 n, n=2xLxS K/ ( πχΌ ) , 其 中, L为抽油杆沖程, S为抽油杆沖次。 在无齿传动抽油机的设计中, Κ 优选为 0- 10 , 而驱动轮直径 D优选为 0.2m- 1 .5m。  In the case of the above belt drive, the motor 310 can be used with all motors that can satisfy the pumping conditions. For the selection of the motor parameters, specifically, the rated output torque of the motor should be greater than or equal to G, G = PxD / ( 2 χΚ ), where Ρ is the traction of the motor output, D is the diameter of the drive wheel, and Κ is the diameter of the second pulley The ratio to the diameter of the first pulley. Among them, the traction force Ρ is equal to the difference in gravity between the sucker rod 304 and the counterweight 3 14 , and also includes the resistance generated in the pumping operation. Traction Ρ varies depending on the depth of the well and the well condition. In the design of the pumping unit of this embodiment, the traction force of the motor output is Ν 3000 Ν to 50,000 。. At the same time, the rotational speed of the motor 310 is preferably greater than or equal to n, n = 2 x L x S K / ( π χΌ ), where L is the stroke of the sucker rod and S is the stroke of the sucker rod. In the design of the toothless drive pumping unit, Κ is preferably 0-10, and the drive wheel diameter D is preferably 0.2m - 1.5m.
在其他实施例中, 还可以用链轮链条方式代替皮带传动方式。 即所 述传动装置包括第一链轮、 第二链轮和链条。 其中, 电机 310的输出轴 上同轴安装有第一链轮, 第一链轮的直径较小。 抽油机的驱动轴 330通 过轴承 33 1安装在支架 308上, 在驱动轴 330上同轴安装有第二链轮和 驱动轮 329 , 第二链轮具有比第一链轮更大的直径。 第一链轮和第二链 轮通过链条相连。 由于第二链轮固定在驱动轴 330上(例如通过过盈配 合或键联接),链条可以将电机 3 10的输出转矩和转速传递到驱动轴 330。  In other embodiments, a sprocket chain can also be used in place of the belt drive. That is, the transmission includes a first sprocket, a second sprocket, and a chain. Wherein, the first sprocket is coaxially mounted on the output shaft of the motor 310, and the diameter of the first sprocket is small. The drive shaft 330 of the pumping unit is mounted on the bracket 308 via a bearing 33 1 on which a second sprocket and a drive wheel 329 are coaxially mounted, the second sprocket having a larger diameter than the first sprocket. The first sprocket and the second sprocket are connected by a chain. Since the second sprocket is fixed to the drive shaft 330 (e.g., by interference fit or keying), the chain can transmit the output torque and rotational speed of the motor 3 10 to the drive shaft 330.
在第二实施方式中, 电机 310采用永磁同步电机, 并且选用输出转矩 300Nm以上、 输出功率 5-45Kw、 转速在 500rpm以下的永磁同步电机。 在本实施例中, 采用额定输出转矩 800Nm、 额定输出功率 8kw, 额定转速 85rpm的 兹同步电机。 这是因为, 同步电机更能满足大转矩、 低转 速的工作要求, 不仅有利于节约能源, 更能避免高转速电机工作时产生的 噪音, 进一步降低了抽油机整体的工作噪音。  In the second embodiment, the motor 310 is a permanent magnet synchronous motor, and a permanent magnet synchronous motor having an output torque of 300 Nm or more, an output of 5-45 Kw, and a rotational speed of 500 rpm or less is selected. In the present embodiment, a zigzag motor having a rated output torque of 800 Nm, a rated output of 8 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.
当抽油杆 304到达油井的预定深度完成采油后, 需要将抽油扞 304 提起, 因此需要实现驱动轮 329的反向转动, 即实现电机 310的反向转 动。 优选地, 采用位置测量装置来控制电机 10 的反向转动。 在本实施 例中, 采用计数盘和接近开关作为位置测量装置。 计数盘同轴固定在驱 动轴 330上, 在支架 308的平台上、 并与计数盘之间留有较小间隙的地 方设有接近开关。 接近开关为磁力开关。 在抽油杆 304的工作行程中, 接近开关对驱动轴的转数进行计数, 当达到预定转数时, 接近开关向控 制装置发出信号, 使电控拒 309控制电机 310反转。 After the sucker rod 304 reaches the predetermined depth of the oil well to complete the oil recovery, the oil sucking bowl 304 needs to be lifted, so that the reverse rotation of the driving wheel 329 is required, that is, the reverse rotation of the motor 310 is realized. Preferably, the position measuring device is employed to control the reverse rotation of the motor 10. In this implementation In the example, a counter disk and a proximity switch are used as the position measuring device. The counter disk is coaxially fixed to the drive shaft 330, and a proximity switch is provided on the platform of the bracket 308 with a small gap left between the counter and the counter. The proximity switch is a magnetic switch. In the working stroke of the sucker rod 304, the proximity switch counts the number of revolutions of the drive shaft. When the predetermined number of revolutions is reached, the proximity switch sends a signal to the control device to cause the electronically controlled switch 309 to control the motor 310 to reverse.
上述位置测量装置也可以设置在抽油机的其他部位, 例如, 可以设置 在电机 310 的输出轴上。 而位置测量装置也不限于上述的计数盘 /接近开 关, 其他适合的位置测量装置都可以采用, 例如光电编码器等等。  The position measuring device described above may also be provided at other parts of the pumping unit, for example, on the output shaft of the motor 310. The position measuring device is not limited to the above-mentioned counter/proximity switch, and other suitable position measuring devices may be employed, such as a photoelectric encoder or the like.
由于本发明的抽油机通常在风力较大的环境中使用, 因此为了提高防 风能力, 优选地, 将主框架 301制成筒式结构, 该筒式结构为上、 下部通 风的半封闭空间。 并且该筒式结构优选为圆筒式结构, 从而使位于该圓筒 式框架内的圆柱形的配重 314能够不受风力干扰正常地上下运行, 这明显 提高了抽油机运行的可靠性和安全性。  Since the pumping unit of the present invention is generally used in a windy environment, in order to improve the windproof capability, the main frame 301 is preferably formed into a cylindrical structure which is a semi-enclosed space in which the upper and lower sides are ventilated. And the cylindrical structure is preferably a cylindrical structure, so that the cylindrical weight 314 located in the cylindrical frame can be normally operated up and down without wind disturbance, which obviously improves the reliability of the pumping unit operation and safety.
为了方便技术人员上下主框架 301, 主框架 301上还设有扶梯 305 , 而且主框架 301下部设有防盗门 302, 以防止主框架 301 内部的抽油机 部件被盗。防盗门 302背面设有电控操纵盘 303 ,通过该电控操纵盘 303 操作人员可以控制整个电控拒 309中的电控器件。  In order to facilitate the technician to lower the main frame 301, the main frame 301 is further provided with an escalator 305, and a lower portion of the main frame 301 is provided with a security door 302 to prevent the pumping unit parts inside the main frame 301 from being stolen. An electronic control panel 303 is disposed on the back of the security door 302. Through the electronic control panel 303, the operator can control the electronic control device in the entire electronically controlled rejection 309.
尽管本发明是通过上述的优选实施例进行描述的,但是其实现形式并 不局限于上述的实施方式。 应该认识到在不脱离本发明主旨的情况下, 本 领域技术人员可以对本发明做出不同的变化和修改。  Although the invention has been described in terms of the preferred embodiments described above, the implementation thereof is not limited to the embodiments described above. It will be appreciated that various changes and modifications can be made by those skilled in the art without departing from the scope of the invention.

Claims

权 利 要 求 Rights request
1、 一种无齿传动抽油机, 其特征在于, 包括主框架、 支架、 电机、 抽油杆、 悬绳器、 配重、 驱动轴、 驱动绳、 驱动轮、 第一皮带轮、 第二 皮带轮和皮带; 其中, 支架位于主框架顶部, 所述支架具有平台, 所述 电机安装在支架的平台上, 所述驱动轴安装在支架上, 所述驱动轮安装 在所述驱动轴上, 所述抽油杆和悬绳器通过绕过驱动轮的驱动绳与配重 连接, 所述电机的输出轴上安装有第一皮带轮, 所述驱动轴上安装有第 二皮带轮, 所述皮带连接所述第一皮带轮和第二皮带轮, 所述电机的额 定输出转矩大于或等于 G, G通过下式定义: 1. A toothless transmission pumping unit, comprising: a main frame, a bracket, a motor, a sucker rod, a suspension rope, a counterweight, a drive shaft, a drive rope, a drive wheel, a first pulley, and a second pulley And a belt; wherein the bracket is located at the top of the main frame, the bracket has a platform, the motor is mounted on the platform of the bracket, the driving shaft is mounted on the bracket, and the driving wheel is mounted on the driving shaft, The sucker rod and the suspension rope are connected to the counterweight by a drive rope that bypasses the drive wheel, the output pulley of the motor is mounted with a first pulley, and the drive shaft is mounted with a second pulley, the belt is connected to the The first pulley and the second pulley, the rated output torque of the motor is greater than or equal to G, G is defined by:
G=PxD/ ( 2χΚ ) , 其中, Ρ为电机输出的牵引力, D为驱动轮直径, Κ为第二皮带轮直径与第一皮带轮直径之比。  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 pulley to the diameter of the first pulley.
2、 根据权利要求 1所述的无齿传动抽油机, 其特征在于, 所述电机 的额定转速大于或等于 η, η通过下式定义:  2. The toothless transmission pumping unit according to claim 1, wherein the rated speed of the motor is greater than or equal to η, and η is defined by:
n=2xLxSxK/ ( πχϋ ) , 其中, L为抽油杆沖程, S为抽油杆冲次, Κ 为 0-10, 而驱动轮直径 D为 0.3m-1.2m。  n=2xLxSxK/ ( πχϋ ) , where L is the stroke of the sucker rod, S is the stroke of the sucker rod, Κ is 0-10, and the diameter D of the drive wheel is 0.3m-1.2m.
3、 根据权利要求 1或 2所述的无齿传动抽油机, 其特征在于, 电机 输出的牵引力 P为 5880N至 29400N。  3. A toothless transmission pumping unit according to claim 1 or 2, characterized in that the traction P of the motor output is 5880N to 29400N.
4、 根据权利要求 3所述的无齿传动抽油机, 其特征在于, 所述电机 为永磁同步电机。  4. The toothless transmission pumping unit according to claim 3, wherein the motor is a permanent magnet synchronous motor.
5、 根据权利要求 4所述的无齿传动抽油机, 其特征在于, 该无齿传 动抽油机还包括控制装置和位置测量装置, 所述位置测量装置包括计数 盘和接近开关, 所述计数盘安装在驱动轴或电机的输出轴上, 接收计数 盘位置信号的所述接近开关与所述控制装置连接, 所述控制装置与电机 连接, 向电机输出设定频率的电压, 并且根据所述位置测量装置产生的 信号使电机正、 反向转动。  5. The toothless transmission pumping unit according to claim 4, wherein the toothless transmission pumping unit further comprises a control device and a position measuring device, the position measuring device comprising a counter disk and a proximity switch, The counting disk is mounted on the output shaft of the driving shaft or the motor, and the proximity switch receiving the signal of the counting disk position is connected to the control device, the control device is connected with the motor, and outputs a voltage of a set frequency to the motor, and according to the The signal generated by the position measuring device causes the motor to rotate in the forward and reverse directions.
6、 根据权利要求 4所述的无齿传动抽油机, 其特征在于, 该无齿传 动抽油机还包括控制装置和位置测量装置, 所述位置测量装置是光电编 码器, 所述光电编码器安装在驱动轴或电机的输出轴上, 并与控制装置 连接, 所述控制装置与电机连接, 向电机输出设定频率的电压, 并且根 据所述位置测量装置产生的信号使电机正、 反向转动。 6. The toothless transmission pumping unit according to claim 4, wherein the toothless transmission pumping unit further comprises a control device and a position measuring device, wherein the position measuring device is a photoelectric encoder, the photoelectric encoding Installed on the drive shaft or the output shaft of the motor, and with the control unit Connected, the control device is connected to the motor, outputs a voltage of a set frequency to the motor, and rotates the motor in the forward and reverse directions according to a signal generated by the position measuring device.
7、 根据权利要求 1所述的无齿传动抽油机, 其特征在于, 所述无齿 传动抽油机还包括保险绳, 所述保险绳的一端与配重紧固连接、 另一端 与驱动轮紧固连接。  7. The toothless transmission pumping unit according to claim 1, wherein the toothless transmission pumping unit further comprises a safety rope, one end of the safety rope is fastened to the weight, and the other end is driven. Wheel fastening connection.
8、 根据权利要求 1所述的无齿传动抽油机, 其特征在于, 该抽油机 框架底部设有调整顶丝和滚轮。  8. The toothless transmission pumping unit according to claim 1, wherein the bottom of the pumping unit frame is provided with an adjusting top wire and a roller.
9、 根据权利要求 1所述的无齿传动抽油机, 其特征在于, 该抽油机 还包括用于保持配重竖直运动的导向机构, 且所述导向机构安装在配重 上, 所述配重沿着导向机构移动。  9. The toothless transmission pumping unit according to claim 1, wherein the pumping unit further comprises a guiding mechanism for maintaining vertical movement of the weight, and the guiding mechanism is mounted on the counterweight. The counterweight moves along the guiding mechanism.
10、 根据权利要求 1所述的无齿传动抽油机, 其特征在于, 该无齿 传动抽油机还包括卷扬机, 所述卷扬机设置在支架的平台上, 卷扬机通 过连接装置与配重连接。  The toothless transmission pumping unit according to claim 1, wherein the toothless transmission pumping unit further comprises a hoisting machine, the hoisting machine is disposed on the platform of the bracket, and the hoisting machine is connected to the counterweight through the connecting device.
1 1、 根据权利要求 10所述的无齿传动抽油机, 其特征在于, 所述连 接装置包括卷扬绳、 定滑轮、 动滑轮和卷扬绳固定器, 其中动滑轮与配 重连接, 卷扬绳的一端与卷杨机连接, 卷扬绳的另一端绕过定滑轮和动 滑轮连接到卷扬绳固定器上。  1 . The toothless transmission pumping unit according to claim 10, wherein the connecting device comprises a hoisting rope, a fixed pulley, a movable pulley and a hoisting rope holder, wherein the movable pulley is connected with the counterweight, and the hoisting One end of the rope is connected to the roll yang machine, and the other end of the hoist rope is connected to the hoisting rope holder around the fixed pulley and the movable pulley.
12、 根据权利要求 1所述的无齿传动抽油机, 其特征在于, 该无齿 传动抽油机还包括导向装置, 所述导向装置安装在支架的平台上, 所述 驱动绳绕过导向装置。  12. The toothless transmission pumping unit according to claim 1, wherein the toothless transmission pumping unit further comprises a guiding device mounted on a platform of the bracket, the driving rope bypassing the guiding Device.
13、 一种无齿传动抽油机, 其特征在于, 包括支架、 电机、 抽油杆、 悬绳器、 配重、 驱动轴、 驱动绳、 驱动轮、 第一链轮、 第二链轮和链条; 所述电机安装在支架上, 所述驱动轴安装在支架上, 所述驱动轮安装在 所述驱动轴上, 所述抽油杆和悬绳器通过绕过驱动轮的驱动绳与配重连 接; 所述电机的输出轴上安装有第一链轮, 所述驱动轴上安装有第二链 轮, 所述链条连接所述第一链轮和第二链轮; 所述电机的额定输出转矩 大于或等于 G, G通过下式定义:  13. A toothless transmission pumping unit, comprising: a bracket, a motor, a sucker rod, a suspension rope, a counterweight, a drive shaft, a drive rope, a drive wheel, a first sprocket, a second sprocket, and a chain; the motor is mounted on a bracket, the drive shaft is mounted on the bracket, the drive wheel is mounted on the drive shaft, and the sucker rod and the suspension rope pass the drive rope bypassing the drive wheel a first sprocket is mounted on the output shaft of the motor, and a second sprocket is mounted on the drive shaft, the chain connecting the first sprocket and the second sprocket; The output torque is greater than or equal to G, and G is defined by:
G=PxD/ ( 2χΚ ) , 其中, Ρ为电机输出的牵引力, D为驱动轮直径, Κ为第二链轮直径与第一链轮直径之比。  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.
PCT/CN2007/002347 2007-04-26 2007-08-06 Pumping nuiit without gear driving WO2008131610A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN200710098039.1 2007-04-26
CN 200710098039 CN101037936A (en) 2007-04-26 2007-04-26 Gearless transmission oil pumping machine
CN200710097714.9 2007-04-28
CN 200710097714 CN101046145A (en) 2007-04-28 2007-04-28 Pumping unit

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WO2008131610A1 true WO2008131610A1 (en) 2008-11-06

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RU2479751C1 (en) * 2011-08-26 2013-04-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Тюменский государственный нефтегазовый университет" (ТюмГНГУ) Mobile conventional pumping unit
CN104514866A (en) * 2013-09-27 2015-04-15 中国石油天然气股份有限公司 Magnetic coupling-gear transmission device of pumping unit
CN105464631A (en) * 2016-01-05 2016-04-06 靳宝才 Drum-type-balancing difference pumping unit
CN106894809A (en) * 2017-03-17 2017-06-27 董少明 The double reversing pumping units of triangle chain
CN107524424A (en) * 2017-10-10 2017-12-29 熊亮 Pumping unit moving device
CN110939410A (en) * 2019-12-26 2020-03-31 张海涛 Speed protection controller for belt type oil pumping unit
CN112709912A (en) * 2021-01-09 2021-04-27 傅广林 Arc-shaped movable mechanical vehicle platform for LED display screen

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CN1710248A (en) * 2004-08-06 2005-12-21 金成群 Oil-pumping workover rig
CN200975333Y (en) * 2006-10-10 2007-11-14 金成群 Gearless transmission oil pumping machine

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CN1279353A (en) * 1999-07-06 2001-01-10 李裕谨 Friction-driven self-locking roll-type pumping unit
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2479751C1 (en) * 2011-08-26 2013-04-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Тюменский государственный нефтегазовый университет" (ТюмГНГУ) Mobile conventional pumping unit
CN104514866A (en) * 2013-09-27 2015-04-15 中国石油天然气股份有限公司 Magnetic coupling-gear transmission device of pumping unit
CN105464631A (en) * 2016-01-05 2016-04-06 靳宝才 Drum-type-balancing difference pumping unit
CN106894809A (en) * 2017-03-17 2017-06-27 董少明 The double reversing pumping units of triangle chain
CN107524424A (en) * 2017-10-10 2017-12-29 熊亮 Pumping unit moving device
CN110939410A (en) * 2019-12-26 2020-03-31 张海涛 Speed protection controller for belt type oil pumping unit
CN112709912A (en) * 2021-01-09 2021-04-27 傅广林 Arc-shaped movable mechanical vehicle platform for LED display screen
CN112709912B (en) * 2021-01-09 2024-05-14 傅广林 Arc-shaped movable mechanical vehicle table for LED display screen

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